Air conditioner model selection method, system and device

文档序号：49392 发布日期：2021-09-28 浏览：23次中文

阅读说明：本技术 空调选型方法、系统及装置 (Air conditioner model selection method, system and device ) 是由王超安普光张捷孟庆超徐龙靖梁文龙付松辉于 2020-03-27 设计创作，主要内容包括：本发明涉及空调技术领域,具体提供了一种空调选型方法、系统及装置,旨在解决在空调研发设计中针对非标准工况下的空调如何便捷、高效和准确地确定空调参数的问题。本发明基于制冷量、制冷功率、冷水温度与换热装置类型之间的对应关系并根据冷水温度输入值与制冷量输入值进行插值计算,获取在冷水温度输入值与制冷量输入值的条件下每类换热装置各自对应的制冷功率,根据制冷量输入值与制冷功率计算相应的压降并根据压降需求选取换热装置。当空调选型输入参数不符合标准工况要求时,通过上述步骤可以得出换热装置的准确压降。同时,由于不同换热装置的插值计算过程相互独立,因此能够同时对多个换热装置进行选型计算,提高空调选型效率。(The invention relates to the technical field of air conditioners, and particularly provides an air conditioner model selection method, an air conditioner model selection system and an air conditioner model selection device, aiming at solving the problem of how to conveniently, efficiently and accurately determine air conditioner parameters aiming at an air conditioner under a non-standard working condition in the research and development design of the air conditioner. The invention carries out interpolation calculation according to the cold water temperature input value and the refrigerating capacity input value based on the corresponding relation among the refrigerating capacity, the refrigerating power, the cold water temperature and the type of the heat exchange device, obtains the refrigerating power corresponding to each type of heat exchange device under the condition of the cold water temperature input value and the refrigerating capacity input value, calculates the corresponding pressure drop according to the refrigerating capacity input value and the refrigerating power, and selects the heat exchange device according to the pressure drop requirement. When the air conditioner model selection input parameters do not meet the standard working condition requirements, the accurate pressure drop of the heat exchange device can be obtained through the steps. Meanwhile, the interpolation calculation processes of different heat exchange devices are mutually independent, so that the type selection calculation can be carried out on a plurality of heat exchange devices at the same time, and the type selection efficiency of the air conditioner is improved.)

1. An air conditioner type selection method is characterized by comprising the following steps:

obtaining air conditioner type selection input parameters, wherein the air conditioner type selection input parameters comprise a cold water temperature input value, a heat exchange pipe dirt coefficient, a refrigerating capacity input value and one or more heat exchange device types;

calculating cold water correction temperature according to the dirt coefficient of the heat exchange tube, and performing correction calculation on the cold water temperature input value according to the cold water correction temperature to obtain corrected cold water temperature;

based on the preset one-to-one correspondence relationship among the refrigeration capacity, the refrigeration power, the cold water temperature and the type of the heat exchange device and according to the corrected cold water temperature, the refrigeration capacity input value and the type of the heat exchange device, obtaining a plurality of cold water temperatures which are respectively corresponding to each type of heat exchange device and are close to the corrected cold water temperature, a plurality of refrigeration capacities which are close to the refrigeration capacity input value and a plurality of corresponding refrigeration powers;

carrying out interpolation calculation according to the corrected cold water temperature and the refrigerating capacity input value and the obtained multiple cold water temperatures, multiple refrigerating capacities and multiple refrigerating powers corresponding to the heat exchange devices of each type, obtaining and outputting the refrigerating powers corresponding to the heat exchange devices of each type under the conditions of the corrected cold water temperature and the refrigerating capacity input value according to the calculation result, and calculating the pressure drop corresponding to the heat exchange devices of each type according to the refrigerating capacity input value and the refrigerating powers so as to select the heat exchange devices of the corresponding type according to the pressure drop and the preset pressure drop requirement;

and the pressure drop is the pressure drop between the cold water inflow side and the cold water outflow side in the heat exchange device, and the corrected cold water temperature is the chilled water outlet water temperature or the cooling water inlet water temperature.

2. The air conditioner model selection method according to claim 1, further comprising:

step S1: respectively calculating a first refrigerating capacity calculation value corresponding to each preset target load grade by taking the refrigerating capacity input value as a full-load refrigerating capacity;

step S2: judging whether the air conditioner type selection input parameters comprise variable flow parameters or not; if yes, go to step S3; if not, go to step S4;

step S3: acquiring a first load grade input value in the variable flow parameter and judging whether the preset target load grade is less than or equal to the first load grade input value or not; if yes, go to step S4; if not, go to step S5;

step S4: based on a one-to-one correspondence relationship among preset refrigerating capacity, refrigerating power, cold water temperature and cold water flow and according to the first refrigerating capacity calculated value and a cold water flow input value in the air conditioner type selection input parameter, acquiring a plurality of refrigerating capacities close to the first refrigerating capacity calculated value, a plurality of cold water flows close to the cold water flow input value, and a plurality of corresponding refrigerating powers and cold water temperatures; performing interpolation calculation according to the first refrigerating capacity calculation value, the cold water flow input value, the acquired refrigerating capacities, the acquired refrigerating powers and the acquired cold water temperatures, acquiring and outputting the refrigerating powers and the cold water temperatures corresponding to the preset target load grades under the conditions of the first refrigerating capacity calculation value and the cold water flow input value according to the calculation result, and calculating the air conditioner energy efficiency ratio according to the first refrigerating capacity calculation value and the refrigerating powers obtained through interpolation calculation;

step S5: based on preset refrigerating capacity, refrigerating power, the one-to-one correspondence relationship between cold water temperature and cold water flow and according to the first refrigerating capacity calculated value, obtaining a plurality of refrigerating capacities close to the first refrigerating capacity calculated value, and a plurality of corresponding refrigerating power, cold water temperature and cold water flow; and carrying out interpolation calculation according to the first refrigerating capacity calculation value and the obtained refrigerating capacities, refrigerating powers, cold water temperatures and cold water flows, obtaining and outputting the refrigerating power, the cold water temperature and the cold water flow corresponding to the preset target load grade under the condition of the first refrigerating capacity calculation value according to the calculation result, and calculating the air conditioner energy efficiency ratio according to the first refrigerating capacity calculation value and the refrigerating power obtained through interpolation calculation.

3. The air conditioner type selection method as claimed in claim 2, wherein when the air conditioner type selection input parameter includes a variable water temperature parameter, after step S4 or step S5, the method further comprises:

acquiring a second load grade input value and a variable water temperature input value in the variable water temperature parameter;

calculating a cold water temperature calculation value corresponding to each preset target load grade according to the second load grade input value, the variable water temperature input value and the cold water temperature input value and a method shown as the following formula:

wherein, T is_{n _ calculation}Is the calculated value of the cold water temperature corresponding to the nth target load grade, T_{m _ calculation}The load grade is a calculated value of the cold water temperature corresponding to the target load grade corresponding to the input value of the second load grade, and N is 1, … m, …, N and N are load grades corresponding to full load; the above-mentioned The T is_{N _ calculation}Is corresponding to full loadCalculated cold water temperature of said T_{N _ calculation}And said T_{m _ calculation}The values of (a) are dependent on the cold water temperature input value and the variable water temperature input value, respectively;

calculating a value T according to the cold water temperature based on the one-to-one correspondence relationship among preset refrigerating capacity, refrigerating power, cold water temperature and cold water flow_{n _ calculation}Obtaining a calculated value T of the cold water temperature according to a specific cold water flow parameter_{n _ calculation}A plurality of proximate chilled water temperatures, a plurality of chilled water flows proximate to the particular chilled water flow parameter, and a corresponding plurality of refrigeration capacities and a plurality of refrigeration powers;

calculating the value T according to the cold water temperature_{n _ calculation}Carrying out interpolation calculation with specific cold water flow parameters, a plurality of obtained cold water temperatures, a plurality of obtained cold water flows, a plurality of obtained refrigerating capacities and a plurality of obtained refrigerating powers, and obtaining and outputting a calculated value T at the cold water temperature according to a calculation result_{n _ calculation}Calculating the energy efficiency ratio of the air conditioner according to the refrigerating capacity and the refrigerating power corresponding to the preset target load grade under the condition of a specific cold water flow parameter;

wherein the specific cold water flow parameter is a cold water flow input value among the air conditioner selection input parameters when the step S4 is performed, and the specific cold water flow parameter is a cold water flow output according to an interpolation calculation result in the step S5 when the step S5 is performed.

4. The air conditioner type selection method as claimed in claim 2, wherein when the air conditioner type selection input parameter includes a target cooling capacity, after step S4 or step S5, the method further comprises:

respectively calculating a second refrigerating capacity calculation value corresponding to each preset target load grade by taking the target refrigerating capacity as a full-load refrigerating capacity;

acquiring a first refrigerating capacity calculated value corresponding to the preset target load grade, and outputting refrigerating power and cold water temperature corresponding to the preset target load grade under the condition of the first refrigerating capacity calculated value according to an interpolation calculation result in the step S4 or the step S5;

calculating and outputting an actual target power value corresponding to a preset target load grade according to the first refrigerating capacity calculated value, the second refrigerating capacity calculated value, the refrigerating power and the cold water temperature and according to a method shown in the following formula:

P′_{n _ actual}＝[(P_n-P_n-1)×K_ΔC+P_n-1]×{1+[(T_n-T_n-1)×K_ΔC+T_n-1-T_n]×k_t}

Wherein, the P'_nIs the actual target power value, P_nAnd P_n-1The refrigerating powers respectively corresponding to the nth target load grade and the n-1 target load grade, T_nAnd T_n-1The cold water temperature corresponding to the nth target load grade and the n-1 target load grade respectively, and the k_tIs a preset correction factor, said K_ΔCIs the ratio of the cold capacity difference andc'_nIs a second calculated cooling capacity value corresponding to the nth target load grade, C_nIs the first refrigerating capacity calculated value corresponding to the nth target load grade, C_n-1And calculating a first refrigerating capacity value corresponding to the (n-1) th target load grade.

5. An air conditioner model selection system, characterized in that, the system includes:

an input parameter acquisition device configured to acquire air conditioner selection input parameters including a cold water temperature input value, a heat exchange tube fouling coefficient, a refrigeration capacity input value, and one or more heat exchange device types;

the cold water temperature correction device is configured to calculate a cold water correction temperature according to the dirt coefficient of the heat exchange pipe, and perform correction calculation on the cold water temperature input value according to the cold water correction temperature to obtain a corrected cold water temperature;

a target parameter obtaining device configured to obtain, based on a one-to-one correspondence relationship among preset refrigeration capacity, refrigeration power, cold water temperature, and heat exchanger type, and according to the corrected cold water temperature, the refrigeration capacity input value, and the heat exchanger type, a plurality of cold water temperatures close to the corrected cold water temperature, a plurality of refrigeration capacities close to the refrigeration capacity input value, and a plurality of corresponding refrigeration powers, which are respectively corresponding to each type of heat exchanger;

the target parameter calculation device is configured to perform interpolation calculation according to the corrected cold water temperature and the refrigerating capacity input value and the acquired multiple cold water temperatures, multiple refrigerating capacities and multiple refrigerating powers corresponding to the heat exchange devices of each type, acquire and output the refrigerating powers corresponding to the heat exchange devices of each type under the conditions of the corrected cold water temperature and the refrigerating capacity input value according to the calculation result, and calculate the pressure drop corresponding to the heat exchange devices of each type according to the refrigerating capacity input value and the refrigerating powers so as to select the heat exchange devices of the corresponding type according to the pressure drop and preset pressure drop requirements;

6. The air conditioning model selection system according to claim 5, characterized in that the system further comprises an air conditioning parameter calculation device configured to perform the following operations:

step S2: judging whether the air conditioner type selection input parameters comprise variable flow parameters or not; if yes, go to step S3; if not, go to step S4;

7. The air conditioner model selection system according to claim 6, further comprising: the air-conditioning parameter calculation means is configured to, when the air-conditioning selection input parameter further includes a variable water temperature parameter, perform the following operations after step S4 or step S5:

acquiring a second load grade input value and a variable water temperature input value in the variable water temperature parameter;

wherein, T is_{n _ calculation}Is the calculated value of the cold water temperature corresponding to the nth target load grade, T_{m _ calculation}The load grade is a calculated value of the cold water temperature corresponding to the target load grade corresponding to the input value of the second load grade, and N is 1, … m, …, N and N are load grades corresponding to full load; the above-mentioned The T is_{N _ calculation}Is the calculated value of cold water temperature corresponding to full load, T_{N _ calculation}And said T_{m _ calculation}The values of (a) are dependent on the cold water temperature input value and the variable water temperature input value, respectively;

calculating the value T according to the cold water temperature_{n _ calculation}Carrying out interpolation calculation with specific cold water flow parameters, a plurality of obtained cold water temperatures, a plurality of obtained cold water flows, a plurality of obtained refrigerating capacities and a plurality of obtained refrigerating powers, and obtaining and outputting a calculated value T at the cold water temperature according to a calculation result_{n _ calculation}Bars with specific cold water flow parametersCalculating the energy efficiency ratio of the air conditioner according to the refrigerating capacity and the refrigerating power corresponding to the preset target load grade under the condition;

8. The air conditioner model selection system according to claim 6, further comprising: the air conditioning parameter calculating means is configured to perform the following operations after step S4 or step S5 when the air conditioning selection input parameter further includes a target cooling amount:

acquiring a first refrigerating capacity calculated value corresponding to the preset target load grade, and outputting refrigerating power and cold water temperature corresponding to the preset target load grade according to the interpolation calculation result in the step S4 or the step S5 under the condition of the first refrigerating capacity calculated value;

P′_{n _ actual}＝[(P_n-P_n-1)×K_ΔC+P_n-1]×{1+[(T_n-T_n-1)×K_ΔC+T_n-1-T_n]×k_t}

Wherein, the P'_{n _ actual}Is the actual target power value, P_nAnd P_n-1The refrigerating powers respectively corresponding to the nth target load grade and the n-1 target load grade, T_nAnd T_n-1The cold water temperature corresponding to the nth target load grade and the n-1 target load grade respectively, and the k_tIs a preset correction factor, said K_ΔCIs the ratio of the cold capacity difference andc'_nIs a second calculated cooling capacity value corresponding to the nth target load grade, C_nIs the first refrigerating capacity calculated value corresponding to the nth target load grade, C_n-1And calculating a first refrigerating capacity value corresponding to the (n-1) th target load grade.

9. A storage device having a plurality of program codes stored therein, wherein the program codes are adapted to be loaded and executed by a processor to perform the air conditioner model selection method according to any one of claims 1 to 4.

10. A control apparatus comprising a processor and a storage device adapted to store a plurality of program codes, wherein the program codes are adapted to be loaded and run by the processor to perform the air conditioner model selection method of any one of claims 1 to 4.

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioner model selection method, system and device.

Background

The air conditioning system mainly comprises a compressor, a heat exchange device and other equipment, and the type of the corresponding heat exchange device is mainly determined through water-cooling air conditioning system model selection software (such as model selection software provided by a heat exchange device supplier) in the research and development design of the water-cooling air conditioning system according to input operation parameters (such as the inlet and outlet water temperature of the heat exchange device). However, the type selection software of the existing water-cooling air-conditioning system can only perform type selection calculation according to the operation parameters (such as the chilled water outlet temperature of an evaporator, the cooling water inlet temperature of a condenser and the cold water flow rate) meeting specific standard working conditions (such as the working conditions specified by the national standard GB/T18430.1-2007) and can only provide one type of heat exchange device according to each refrigerating capacity requirement, and the actual operation working conditions of the air conditioner often do not meet the requirements of the specific standard working conditions, so the type selection software of the water-cooling air-conditioning system is not suitable for performing type selection on the heat exchange device of the air conditioner operating in the non-specific standard working conditions.

Accordingly, there is a need in the art for a new air conditioner option to address the above-mentioned problems.

Disclosure of Invention

In order to overcome the defects, the invention provides an air conditioner model selection method, an air conditioner model selection system and an air conditioner model selection device, which solve or at least partially solve the problem of how to conveniently, efficiently and accurately determine air conditioner parameters in air conditioner development and design aiming at an air conditioner running under a non-specific standard working condition (for example, the standard working condition is a working condition specified by national standard GB/T18430.1-2007 of the people's republic of China).

In a first aspect, an air conditioner model selection method is provided, which includes:

In one embodiment of the above air conditioner model selection method, the method further comprises:

step S2: judging whether the air conditioner type selection input parameters comprise variable flow parameters or not; if yes, go to step S3; if not, go to step S4;

In one embodiment of the above air conditioner selection method, when the air conditioner selection input parameter includes a variable water temperature parameter, after step S4 or step S5, the method further includes:

acquiring a second load grade input value and a variable water temperature input value in the variable water temperature parameter;

wherein, T is_{n _ calculation}Is the calculated value of the cold water temperature corresponding to the nth target load grade, T_{m _ calculation}The load grade is a calculated value of the cold water temperature corresponding to the target load grade corresponding to the input value of the second load grade, and N is 1, … m, …, N and N are load grades corresponding to full load; said d is a tolerance andthe T is_{N _ calculation}Is the calculated value of cold water temperature corresponding to full load, T_{N _ calculation}And said T_{m _ calculation}The values of (a) are dependent on the cold water temperature input value and the variable water temperature input value, respectively;

refrigeration capacity based on presettingRefrigerating power, cold water temperature and cold water flow, and calculating value T according to the cold water temperature_{n _ calculation}Obtaining a calculated value T of the cold water temperature according to a specific cold water flow parameter_{n _ calculation}A plurality of proximate chilled water temperatures, a plurality of chilled water flows proximate to the particular chilled water flow parameter, and a corresponding plurality of refrigeration capacities and a plurality of refrigeration powers;

In one embodiment of the above air conditioner selection method, when the air conditioner selection input parameter includes a target cooling capacity, after step S4 or step S5, the method further includes:

P′_{n _ actual}＝[(P_n-P_n-1)×K_ΔC+P_n-1]×{1+[(T_n-T_n-1)×K_ΔC+T_n-1-T_n]×k_t}

In a second aspect, an air conditioner model selection system is provided, which includes:

In one embodiment of the above air conditioning selection system, the system further comprises an air conditioning parameter calculating device configured to perform the following operations:

step S2: judging whether the air conditioner type selection input parameters comprise variable flow parameters or not; if yes, go to step S3; if not, go to step S4;

In one embodiment of the above air conditioning selection system, the air conditioning parameter calculating means is configured to, when the air conditioning selection input parameter further includes a variable water temperature parameter, perform the following after step S4 or step S5:

acquiring a second load grade input value and a variable water temperature input value in the variable water temperature parameter;

wherein, T is_{n _ calculation}Is the calculated value of the cold water temperature corresponding to the nth target load grade, T_{m _ calculation}The load grade is a calculated value of the cold water temperature corresponding to the target load grade corresponding to the input value of the second load grade, and N is 1, … m, …, N and N are load grades corresponding to full load; said d is a tolerance andthe T is_{N _ calculation}Is the calculated value of cold water temperature corresponding to full load, T_{N _ calculation}And said T_{m _ calculation}The values of (a) are dependent on the cold water temperature input value and the variable water temperature input value, respectively;

In one embodiment of the above air conditioning selection system, the air conditioning parameter calculating means is configured to perform the following operations after step S4 or step S5 when the air conditioning selection input parameter further includes a target cooling capacity:

P′_{n _ actual}＝[(P_n-P_n-1)×K_ΔC+P_n-1]×{1+[(T_n-T_n-1)×K_ΔC+T_n-1-T_n]×k_t}

In a third aspect, a storage device is provided, having stored therein a plurality of program codes adapted to be loaded and executed by a processor to perform any of the air conditioner model selection methods described above.

In a fourth aspect, there is provided a control device comprising a processor and a memory device, the memory device adapted to store a plurality of program codes, the program codes adapted to be loaded and run by the processor to perform any of the air conditioner model selection methods described above.

One or more technical schemes of the invention at least have one or more of the following beneficial effects:

according to the technical scheme, firstly, air conditioner type selection input parameters are obtained, temperature correction is carried out on cold water temperature input values in the air conditioner type selection input parameters according to heat exchange tube fouling coefficients, then a plurality of cold water temperatures which are close to the corrected cold water temperature, a plurality of refrigeration amounts which are close to the refrigeration amount input values and corresponding refrigeration powers are obtained according to preset one-to-one correspondence relations among refrigeration amounts, refrigeration powers, cold water temperatures and heat exchange device types, the cold water temperatures are corresponding to each type of heat exchange devices, the refrigeration amounts are close to the corrected cold water temperature, the refrigeration amounts are corresponding to the refrigeration amount input values, and the corresponding refrigeration powers are obtained, interpolation calculation is carried out according to the corrected cold water temperature and refrigeration amount input values, the cold water temperatures, the refrigeration amounts and the refrigeration power drops which are corresponding to each type of heat exchange devices, and each type of heat exchange devices is corresponding to each type of heat exchange devices under the condition that the corrected cold water temperature and the refrigeration amount input values are obtained according to the calculation results The refrigeration power of the heat exchanger is calculated according to the refrigeration quantity input value and the refrigeration power, the pressure drop corresponding to each type of heat exchanger is calculated, and then the heat exchanger of the corresponding type can be selected according to the pressure drop and the preset pressure drop requirement. The refrigeration power of different heat exchange devices under the condition of the air conditioner type selection input parameter is calculated in an interpolation calculation mode, and then the pressure drop of different heat exchange devices is calculated, so that even if the air conditioner type selection input parameter does not meet the requirement of a specific standard working condition, the accurate refrigeration capacity of the heat exchange device under the condition of the current air conditioner type selection input parameter can be obtained by interpolating the refrigeration capacity obtained through the one-to-one correspondence relation among the preset refrigeration capacity, the refrigeration power, the cold water temperature and the type of the heat exchange device, an accurate pressure drop value is calculated, whether the actual pressure drop requirement is met or not is judged according to the pressure drop value, and whether the heat exchange device is selected to be used or not is determined according to the judgment result. Meanwhile, the interpolation calculation processes corresponding to different heat exchange devices are mutually independent, and interference and influence do not exist, so that the method can simultaneously perform type selection calculation on a plurality of heat exchange devices under the condition of current air conditioner type selection input parameters.

Drawings

Embodiments of the invention are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic flow chart of the main steps of an air conditioner model selection method according to an embodiment of the invention;

FIG. 2 is a schematic diagram of the main structure of an air conditioning model selection system according to an embodiment of the present invention;

list of reference numerals:

11: an input parameter acquisition device; 12: a cold water temperature correction device; 13: a target parameter acquisition device; 14: and a target parameter calculation device.

Detailed Description

Some embodiments of the invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

In the description of the present invention, the "device" and "processor" may include hardware, software, or a combination of both. An apparatus may comprise hardware circuitry, various suitable sensors, communication ports, memory, may comprise software components such as program code, and may be a combination of software and hardware. The processor may be a central processing unit, a microprocessor, a digital signal processor, or any other suitable processor. The processor has data and/or signal processing functionality. The processor may be implemented in software, hardware, or a combination thereof. Non-transitory computer readable storage media include any suitable medium that can store program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random-access memory, and the like. The term "a and/or B" denotes all possible combinations of a and B, such as a alone, B alone or a and B. The term "at least one A or B" or "at least one of A and B" means similar to "A and/or B" and may include only A, only B, or both A and B. The singular forms "a", "an" and "the" may include the plural forms as well.

Firstly, it is to be noted that the heat exchange device is an essential key device of the air conditioner, and when the water-cooled air conditioner works in a refrigeration mode, chilled water is gasified and absorbs heat in the heat exchange device, so that the purpose of refrigeration can be achieved; when the water-cooled air conditioner works in a heating mode, cooling water is liquefied in the heat exchange device to release heat, and the purpose of heating can be achieved. The air conditioner type selection refers to the selection and determination of key parameters of the air conditioner, a heat exchange device of the air conditioner and the like according to design requirements during research and development of the water-cooled air conditioner. Among other things, key parameters of the heat exchange device may include a pressure drop between the cold water inflow side and the cold water outflow side.

In the prior art, the traditional model selection software of the water-cooling air-conditioning system can only perform model selection calculation according to heat exchange device parameters (such as chilled water outlet temperature of an evaporator, cooling water inlet temperature of a condenser and cold water flow) meeting specific standards (such as working conditions specified by the national standard GB/T18430.1-2007), and only one type of heat exchange device can be provided according to each refrigerating capacity requirement, and the actual operation working condition of the air conditioner often does not meet the requirements of the working condition of the specific standard, so the model selection software of the water-cooling air-conditioning system is not suitable for performing model selection on the heat exchange device of the air conditioner operating in the working condition of the unspecified standard.

The air conditioner model selection method in the embodiment of the invention firstly obtains air conditioner model selection input parameters (including but not limited to a cold water temperature input value, a heat exchange pipe fouling coefficient, a refrigerating capacity input value, one or more heat exchange device types and the like), corrects the temperature of the cold water temperature input value in the air conditioner model selection input parameters, then obtains a plurality of cold water temperatures which are close to the corrected cold water temperature, a plurality of refrigerating capacities which are close to the refrigerating capacity input value and a plurality of corresponding refrigerating powers which are respectively corresponding to each type of heat exchange device according to the preset one-to-one correspondence relationship among the refrigerating capacity, the refrigerating power, the cold water temperature and the heat exchange device types and the corrected cold water temperature, the refrigerating capacity input value and the heat exchange device types, and finally obtains a plurality of cold water temperature which are respectively corresponding to each type of heat exchange device according to the corrected cold water temperature and refrigerating capacity input value, And carrying out interpolation calculation on the plurality of refrigerating capacities and the plurality of refrigerating powers, acquiring and outputting the refrigerating powers corresponding to each type of heat exchange device under the conditions of the corrected cold water temperature and the refrigerating capacity input value according to the calculation result, calculating the pressure drop corresponding to each type of heat exchange device according to the refrigerating capacity input value and the refrigerating power, and selecting the heat exchange device of the corresponding type according to the pressure drop and the preset pressure drop requirement. The pressure drop of different heat exchange devices under the condition of the air conditioner type selection input parameter is calculated in an interpolation calculation mode, so that even if the air conditioner type selection input parameter does not meet the requirement of a specific standard working condition, the accurate refrigerating capacity of the heat exchange device under the condition of the current air conditioner type selection input parameter can be obtained by interpolating the pressure drop obtained through the one-to-one correspondence relation among the preset refrigerating capacity, the refrigerating power, the cold water temperature and the type of the heat exchange device, an accurate pressure drop value is further calculated, whether the actual pressure drop requirement is met or not is judged according to the pressure drop value, and whether the heat exchange device is selected to be used or not is determined according to the judgment result. Meanwhile, the interpolation calculation processes corresponding to different heat exchange devices are mutually independent, and interference and influence do not exist, so that the method can simultaneously perform type selection calculation on a plurality of heat exchange devices under the condition of current air conditioner type selection input parameters.

Referring to fig. 1, fig. 1 is a flowchart illustrating main steps of an air conditioner model selection method according to an embodiment of the present invention. As shown in fig. 1, the air conditioner model selection method in the embodiment of the present invention mainly includes the following steps:

step S101: and obtaining air conditioner type selection input parameters, wherein the air conditioner type selection input parameters comprise a cold water temperature input value, a heat exchange pipe dirt coefficient, a refrigerating capacity input value and one or more heat exchange device types.

The cold water temperature input value refers to a temperature input value of a cold water inflow side and a temperature input value of a cold water outflow side of the heat exchange device. For example: when the heat exchange device is an evaporator, the input value of the cold water temperature comprises the inlet temperature of the chilled water and the outlet temperature of the chilled water of the evaporator; when the heat exchange device is a condenser, the cold water temperature input value comprises the cooling water inlet temperature and the cooling water outlet temperature of the condenser.

The heat exchange pipe fouling coefficient refers to a coefficient capable of expressing the degree of fouling of a heat exchange pipe in the heat exchange device, and the specific numerical value of the heat exchange pipe fouling coefficient can be set according to the actual operation condition. For example: when the actual operation working condition is a working condition specified by national standard GB/T18430.1-2007 of the people's republic of China, the specific numerical value of the fouling coefficient of the heat exchange tube can be set according to the value range of the fouling coefficient of the heat exchange tube specified in the standard. An example is as follows: the fouling factor of the heat exchange tube when the heat exchange device is an evaporator is 0.018m²K/kW, and the fouling factor of the heat exchange tube is 0.044m when the heat exchange device is a condenser²K/kW。

The refrigerating capacity input value refers to an input value of the refrigerating capacity of the air conditioner. An example is as follows: the refrigeration capacity input is 530 kW.

The heat exchange device type refers to the type of the heat exchange device such as model information. An example is as follows: when the heat exchange device is an evaporator, the heat exchange device types may include an evaporator a, an evaporator B, and an evaporator C.

Step S102: and calculating the cold water correction temperature according to the dirt coefficient of the heat exchange tube, and performing correction calculation on the cold water temperature input value according to the cold water correction temperature to obtain the corrected cold water temperature. When the heat exchange device is an evaporator, the corrected cold water temperature is the outlet water temperature of the chilled water of the evaporator; when the heat exchange device is a condenser, the corrected cold water temperature is the inlet water temperature of the cooling water of the condenser.

When the heat exchange pipe of the heat exchange device is scaled, the scale generated by scaling can influence the heat exchange capacity of the heat exchange device, so that the temperature of the cold water outflow side of the heat exchange device is influenced, the chilled water outflow temperature and the cooling water inflow temperature are corrected by utilizing the scale coefficient of the heat exchange pipe, and the chilled water outflow temperature and the cooling water inflow temperature of the heat exchange device which are closer to the actual operation working condition can be obtained.

In the present embodiment, the calculation method of the fouling coefficient correction temperature specified in the national standard GB/T18430.1-2007 of the people's republic of china can be adopted for calculation, and specifically, the cold water correction temperature can be calculated according to the method shown in the following formula (1):

the meaning of each parameter in the formula (1) is: TD is cold water correction temperature, S is small temperature difference and S ═ t_s-t_wlR is the temperature difference between inlet and outlet water and t_wl-t_we|， ILMTD＝f×(q/A)，t_sIs the heat exchange temperature (e.g. evaporation temperature or condensation temperature), t_weThe temperature of the cold water inlet side of the heat exchanger (such as the inlet temperature of cooling water), t_wlThe temperature of the cold water outflow side of the heat exchange device (such as the temperature of the cooling water outflow), f is the fouling coefficient of the heat exchange tube, q is the refrigerating capacity, and A is the total heat exchange area of the inner side (the side where the fouling is located) of the heat exchange tube.

In this embodiment, after the cold water correction temperature is obtained by calculation, the cold water temperature input value may be corrected and calculated according to the following steps, so as to obtain a corrected cold water temperature (a chilled water outlet temperature or a cooling water inlet temperature):

and acquiring the corrected outlet water temperature of the chilled water according to the temperature difference between the input value of the outlet water temperature of the chilled water and the corrected temperature of the cold water. An example is as follows: the corrected outlet water temperature of the chilled water is equal to or close to the temperature difference. And acquiring the corrected inlet water temperature of the cooling water according to the input value of the inlet water temperature of the cooling water and the temperature and value of the cold water correction temperature. An example is as follows: the corrected inlet water temperature of the cooling water is equal to or close to the temperature sum.

Step S103: and acquiring a plurality of cold water temperatures which are respectively corresponding to each type of heat exchange device and are close to the corrected cold water temperature, a plurality of refrigeration amounts which are respectively corresponding to the input value of the refrigeration amount and a plurality of corresponding refrigeration powers according to the corrected cold water temperature, the input value of the refrigeration amount and the type of the heat exchange device on the basis of the one-to-one correspondence relationship among the preset refrigeration amount, the refrigeration power, the cold water temperature and the type of the heat exchange device.

Each parameter in the one-to-one correspondence relationship between the preset refrigeration capacity, the preset refrigeration power, the preset cold water temperature and the type of the heat exchange device can be obtained by carrying out actual operation tests on the conditions of different refrigeration capacities, different refrigeration powers and the like by research and development designers, and then the correspondence relationship of each parameter is established according to the actual operation test results.

Taking the types of the heat exchange devices A, B and C as examples, the cold water temperature close to the corrected cold water temperature and the cooling capacity close to the cooling capacity input value obtained in step S103 will be further described.

First, the corresponding "one-to-one correspondence relationship a, b, and C between the cooling capacity, the cooling power, the cold water temperature, and the heat exchanger type" is constructed for the heat exchangers A, B and C, respectively. Then, a plurality of cold water temperatures such as Ta1 and Ta2 close to the corrected cold water temperature, a plurality of refrigerating capacities such as Ca1 and Ca2 close to the refrigerating capacity input value, refrigerating power Pa1 corresponding to Ta1 and Ca1 obtained according to the corresponding relation a, and refrigerating power Pa2 corresponding to Ta2 and Ca2 obtained according to the corresponding relation a are obtained according to the corresponding relation a. The method for obtaining the cold water temperature, the refrigerating capacity and the refrigerating power of the heat exchange devices B and C is similar to that of the heat exchange device A, and for brevity of description, the description is omitted here

Step S104: and carrying out interpolation calculation according to the corrected cold water temperature and refrigerating capacity input value and the obtained multiple cold water temperatures, multiple refrigerating capacities and multiple refrigerating powers corresponding to each type of heat exchange device.

Interpolation calculation is a conventional calculation method in the field of data calculation, and aims to calculate and obtain a value of any point in a known data interval. An example is as follows: assuming that the data corresponding to a1 is B1, the data corresponding to a2 is B2, and it is known that the data corresponding to a is B, and a is between a1 and a2, the value of a can be calculated according to the formula (a1-a)/(a1-a2) ═ B1-B)/(B1-B2), specifically: from (a1-a)/(a1-a2) ═ B1-B)/(B1-B2, it is known that: (a1-a) ═ B1-B)/(B1-B2) × (a1-a2), and further a ═ a1- (B1-B)/(B1-B2) × (a1-a2) ═ a1+ (B1-B)/(B1-B2) × (a2-a 1). Wherein A1, A2, B1, B2 and B are known data.

In this embodiment, each data in the "one-to-one correspondence relationship between preset cooling capacity, cooling power, cold water temperature, and heat exchanger type" is known data, and the purpose of the interpolation calculation is to calculate the cooling power corresponding to the corrected cold water temperature (chilled water outlet temperature or cooling water inlet temperature) and the cooling capacity input value.

Step S105: and obtaining and outputting the refrigeration power corresponding to each type of heat exchange device under the condition of the corrected cold water temperature and the refrigeration capacity input value according to the calculation result, and calculating the pressure drop corresponding to each type of heat exchange device according to the refrigeration capacity input value and the refrigeration power so as to select the heat exchange device of the corresponding type according to the pressure drop and the preset pressure drop requirement.

The calculation result refers to the refrigeration power corresponding to the corrected input values of the cold water temperature and the refrigeration capacity, which is obtained by interpolation in step S104. The pressure drop refers to the pressure drop between the cold water inflow side and the cold water outflow side in the heat exchange device.

In this embodiment, the pressure drop of the heat exchange device may be calculated according to the cooling capacity input value and the cooling power and according to the method shown in the following formula (2):

the meaning of each parameter in the formula (2) is: Δ P is the pressure drop of the heat exchanger, γ is a coefficient for correcting the pressure drop of the heat exchanger, γ > 0, which may be provided by a supplier of the heat exchanger, N is the Number of flows (Number of passes) of the heat exchanger, f is the resistance coefficient of the heat exchanger, L is the length of a heat exchange tube in the heat exchanger, di is the inner diameter of the heat exchange tube in the heat exchanger, ρ is the fluid density, v is the fluid flow rate and v is G/(Si · 3600), G is the cold water flow (chilled water flow or cooling water flow), Si is the flow area of the heat exchanger, and in this embodiment, Si may be calculated by a conventional calculation method of the flow area of the heat exchanger in the air conditioning field.

When the heat exchanger is an evaporator, the cold water flow rate G represents the chilled water flow rate, and when the heat exchanger is a condenser, the cold water flow rate G represents the cooling water flow rate. The following description will specifically discuss the calculation method of the chilled water flow rate G1 and the cooling water flow rate G2, taking as an example the case where the parameter G1 represents the chilled water flow rate and the parameter G2 represents the cooling water flow rate. Specifically, the calculation formulas of the chilled water flow rate G1 and the cooling water flow rate G2 are shown in the following formula (3):

the meaning of each parameter in the formula (3) is: q is a refrigerating capacity input value, W is refrigerating power corresponding to the refrigerating capacity input value obtained through interpolation calculation in the step S104, and delta T is the temperature difference between inlet water and outlet water of the heat exchange device.

The pressure drop of different heat exchange devices under the condition of the same air conditioner type selection input parameter can be obtained through the steps, so that an air conditioner designer can select a proper heat exchange device according to the actual pressure drop requirement of the heat exchange device.

Further, the air conditioner type selection method shown in fig. 1 may further include an air conditioner type selection calculation step for an arbitrary load level in one embodiment. The air conditioner model selection calculation step aiming at any load grade specifically comprises the following steps:

step S201: and respectively calculating a first refrigerating capacity calculation value corresponding to each preset target load grade by taking the refrigerating capacity input value as the full-load refrigerating capacity (the load grade corresponding to the refrigerating capacity input value is 100% load).

The preset target load levels may be 90% load, 80% load, 70% load, and so on. First refrigerating capacity calculated valueWherein, C is the input value of the refrigerating capacity, G' is the load grade corresponding to the input value of the refrigerating capacity, and G is the preset target load grade. An example is as follows: if the input value C of the refrigerating capacity is 5004kW, the load grade G' corresponding to the input value of the refrigerating capacity is 100%, and the preset target load is negativeAnd if the load grade G is 90%, the calculated first refrigerating capacity C1 is 4504 kW.

Step S202: judging whether the air conditioner type selection input parameters comprise variable flow parameters or not; if yes, go to step S203; if not, go to step S205.

The variable flow rate parameter includes a first load level input value, and when a preset target load level in step S201 is less than or equal to the first load level input value (for example, the first load level input value is 70% load, and the preset target load level is 60% load), the flow rate of the heat exchange device under the target load level is controlled to be the cold water flow rate input value in the air conditioner type selection input parameter, that is, the cold water flow rate is controlled to be fixed. When the preset target load level in step S201 is greater than the first load level input value (for example, the first load level input value is 70% load, and the preset target load level is 80% load), performing interpolation calculation according to other parameters in the air conditioner type selection input parameters to obtain the cold water flow rate of the heat exchanger at the target load level, that is, the chilled water flow rate control.

Step S203: based on the preset one-to-one correspondence relationship among the refrigeration capacity, the refrigeration power, the cold water temperature and the cold water flow and according to the first refrigeration capacity calculation value and the cold water flow input value in the air conditioner type selection input parameter, a plurality of refrigeration capacities close to the first refrigeration capacity calculation value, a plurality of cold water flows close to the cold water flow input value, a plurality of corresponding refrigeration powers and a plurality of cold water temperatures are obtained.

Each parameter in the one-to-one correspondence relationship among the preset refrigerating capacity, refrigerating power, cold water temperature and cold water flow can be obtained by carrying out actual operation tests on the conditions of different refrigerating capacities, refrigerating powers and the like by research and development designers, and then the correspondence relationship of each parameter is established according to the actual operation test result. The method for obtaining the relevant data according to the corresponding relationship in this embodiment is similar to the method for obtaining the relevant data according to the corresponding relationship in the foregoing step S103, and for brevity of description, details are not repeated here.

Step S204: according to the first refrigerating output calculated value and cold water flow inputInterpolation calculation is carried out on the values and the plurality of refrigeration amounts, the plurality of refrigeration powers and the plurality of cold water temperatures obtained in the step S203, the refrigeration power and the cold water temperature corresponding to the preset target load level under the condition that the first refrigeration amount calculation value and the cold water flow input value are obtained and output according to the calculation result, the air conditioner energy efficiency ratio COP1 is calculated according to the first refrigeration amount calculation value and the refrigeration power obtained through interpolation calculation, and then the model selection calculation is stopped. Wherein the air-conditioning energy efficiency ratioC1 is the first cooling capacity calculation value, and P is the cooling power obtained by interpolation calculation. Through the steps S201 to S204, the cold water flow of the heat exchange device under the preset target load level is a fixed cold water flow input value, namely, the cold water flow is controlled fixedly. The interpolation process in this embodiment is similar to the interpolation process described in the foregoing step S104, and for brevity of description, no further description is provided here.

Step S205: based on the preset one-to-one correspondence relationship among the refrigeration capacity, the refrigeration power, the cold water temperature and the cold water flow and according to the first refrigeration capacity calculation value, a plurality of refrigeration capacities close to the first refrigeration capacity calculation value, a plurality of corresponding refrigeration powers, a plurality of cold water temperatures and a plurality of cold water flows are obtained.

Step S206: and performing interpolation calculation according to the first refrigerating capacity calculated value and the plurality of refrigerating capacities, the plurality of refrigerating powers, the plurality of cold water temperatures and the plurality of cold water flows acquired in step S205, acquiring and outputting the refrigerating power, the cold water temperature and the cold water flow corresponding to the target load level preset under the condition of the first refrigerating capacity calculated value according to the calculation result, calculating the air conditioner energy efficiency ratio COP1 according to the first refrigerating capacity calculated value and the refrigerating power obtained through interpolation calculation, and then stopping the model selection calculation. Wherein the air-conditioning energy efficiency ratioC1 is the first cooling capacity calculation value, and P is the cooling power obtained by interpolation calculation. The heat exchange is carried out under different preset target load levels through the steps S201 to S204 and S206The cold water flow of the device can be changed according to the change of the first refrigerating capacity calculated value corresponding to the preset target load grade, and therefore the variable flow control of the cold water flow is achieved. The interpolation process in this embodiment is similar to the interpolation process described in the foregoing step S104, and for brevity of description, no further description is provided here.

Further, in one embodiment, the air conditioner model selection method shown in fig. 1 may further include a water temperature changing control step after the steps S204 and S206 are performed. The variable water temperature control method specifically comprises the following steps:

step S207: and acquiring a second load grade input value and a variable water temperature input value in the variable water temperature parameter.

Step S208: calculating a cold water temperature calculation value corresponding to each preset target load grade according to the second load grade input value, the variable water temperature input value and the cold water temperature input value and a method shown in the following formula (4):

the meaning of each parameter in the formula (4) is: t is_{n _ calculation}Is the calculated value of the cold water temperature corresponding to the nth target load grade, T_{m _ calculation}The calculated value of the cold water temperature corresponding to the target load grade with the load grade as the input value of the second load grade, wherein N is 1, … m, …, N, N is the load grade corresponding to full load; d is a tolerance andT_{n _ calculation}Is the calculated value of cold water temperature corresponding to full load, T_{N _ calculation}And T_{m _ calculation}The values of (a) are dependent on the cold water temperature input value and the variable water temperature input value, respectively. An example is as follows: the heat exchanger is a condenser, the inlet temperature of the cooling water in the input value of the cold water temperature is 30 ℃, the inlet temperature of the cooling water in the variable water temperature parameter is 24 ℃, the target load grades comprise 10% load, 20% load, 30% load, 40% load, 50% load, 60% load, 70% load, 80% load, 90% load and 100% load, andthe input value of the two-load level is 50% load, T_{N _ calculation}And T_{m _ calculation}The respective temperatures can be 32 ℃ and 23 ℃, and the tolerance d ═ 1.8 ℃ can be calculated. According to the above data and the formula (4), the calculated cold water temperatures of 60% load to 100% load are 24.8 ℃, 26.6 ℃, 28.4 ℃, 30.2 ℃ and 32 ℃ in sequence.

Step S209: based on the preset one-to-one correspondence relationship among the refrigerating capacity, the refrigerating power, the cold water temperature and the cold water flow and according to the cold water temperature calculation value T_{n _ calculation}Obtaining a calculated value T of the temperature of the cold water according to the specific cold water flow parameter_{n _ calculation}A plurality of proximate cold water temperatures, a plurality of cold water flows proximate to a particular cold water flow parameter, and a corresponding plurality of refrigeration capacities and a plurality of refrigeration powers.

In the present embodiment, if the variable water temperature control step is executed after step S204 is executed, the specific cold water flow parameter is the cold water flow input value among the air conditioner selection input parameters. If the variable water temperature control step is performed after step S206 is performed, the specific cold water flow parameter is the cold water flow output from step S206 according to the interpolation calculation result.

Step S210: calculating the value T according to the temperature of cold water_{n _ calculation}Interpolation calculation is carried out on the parameters of the specific cold water flow, the obtained multiple cold water temperatures, the obtained multiple cold water flows, the obtained multiple refrigeration amounts and the obtained multiple refrigeration powers, and a calculated value T at the cold water temperature is obtained and output according to the calculation result_{n _ calculation}And calculating the COP2 according to the refrigerating capacity and the refrigerating power corresponding to the preset target load grade under the condition of the specific cold water flow parameter. Wherein the air-conditioning energy efficiency ratio C2 is the refrigerating capacity obtained by interpolation, and P is the refrigerating power obtained by interpolation. For a preset target load level with a load level equal to or less than the second load level input value, the steps S207 to S209 may be performedThe cold water temperature of the heat exchange device under the target load grades is a fixed cold water temperature calculated value T_{n _ calculation}Thus realizing the fixed cold water temperature control. For the preset target load grades with the load grades larger than the second load grade input value, the cold water temperature of the heat exchange device under the target load grades can be calculated according to the cold water temperature calculation value T corresponding to each target load grade through the steps S207 to S209_{n _ calculation}The temperature of the water is changed, namely, the variable water temperature control of different load grades is realized. The interpolation process in this embodiment is similar to the interpolation process described in the foregoing step S104, and for brevity of description, no further description is provided here.

Further, in one embodiment, the air conditioner model selection method shown in fig. 1 may further include a target cooling capacity control step after the steps S204 and S206 are performed. The target refrigeration quantity control step specifically comprises:

step S211: and respectively calculating a second refrigerating capacity calculation value corresponding to each preset target load grade by taking the target refrigerating capacity as the full-load refrigerating capacity (the load grade corresponding to the target refrigerating capacity can be 100 percent of load).

Step S212: a first refrigerating capacity calculated value corresponding to the preset target load grade acquired in step S201, and refrigerating power and cold water temperature corresponding to the preset target load grade output according to the interpolation calculation result in step S204 or step S206 under the condition of the first refrigerating capacity calculated value are acquired.

Step S213: calculating and outputting an actual target power value corresponding to a preset target load grade according to the first refrigerating capacity calculated value, the second refrigerating capacity calculated value, the refrigerating power and the cold water temperature and a method shown in the following formula (5):

P′_{n _ actual}＝[(P_n-P_n-1)×K_ΔC+P_n-1]×{1+[(T_n-T_n-1)×K_ΔC+T_n-1-T_n]×k_t} (5)

The meaning of each parameter in the formula (5) is: p'_{n _ actual}Is the actual target power value, P_nAnd P_n-1Are respectively provided withIs the refrigerating power, T, of the nth target load level corresponding to the n-1 target load levels_nAnd T_n-1The cold water temperature k corresponding to the nth target load grade and the n-1 target load grade_tIs a preset correction factor, K_ΔCIs the ratio of the cold capacity difference andC′_nis a second calculated cooling capacity value corresponding to the nth target load grade, C_nIs a first calculated cooling capacity value, C, corresponding to the nth target load grade_n-1And calculating a first refrigerating capacity value corresponding to the (n-1) th target load grade.

The following is a detailed description of the derivation process of the actual target power value calculation formula shown in formula (5).

Step 1: the cold difference ratio was calculated according to the method shown in the following formula (6):

the meaning of each parameter in the formula (6) is: k_ΔCIs the cold capacity difference ratio, C'_nIs a second calculated cooling capacity value corresponding to the nth target load grade, C_nIs the calculated value of the refrigerating capacity corresponding to the nth target load grade, C_n-1And (4) calculating the refrigerating capacity corresponding to the (n-1) th target load grade.

Step 2: the target power value is calculated according to the method shown in the following equation (7):

P′_n＝(P_n-P_n-1)×K_ΔC+P_n-1 (7)

the meaning of each parameter in the formula (7) is: p'_nIs the target power value, P_nAnd P_n-1Respectively calculating the refrigerating power of the nth target load grade and the refrigerating power of the n-1 target load grade.

And step 3: the target cold water temperature was calculated according to the method shown in (8) below:

T′_n＝(T_n-T_n-1)×K_ΔC+T_n-1 (8)

the meaning of each parameter in the formula (8) is: t'_nIs the target cold water temperature, T_nAnd T_n-1The cold water temperatures corresponding to the nth target load class and the n-1 target load classes are respectively set.

And 4, step 4: the power correction coefficient is calculated according to the method shown in the following equation (9):

K_T＝(T′_n-T_n)×k_t (9)

the meaning of each parameter in formula (9) is: k_TIs the power correction factor, k_tIs a preset correction coefficient.

And 5: the actual target power value is calculated according to the method shown in the following equation (10):

P′_{n _ actual}＝P′_n×(1+K_T) (10)

The meaning of each parameter in the formula (10) is: p'_{n _ actual}Is the actual target power value.

The formula (5) can be obtained by substituting the formulas (6) to (9) into the formula (10).

It should be noted that, although the foregoing embodiments describe each step in a specific sequence, those skilled in the art will understand that, in order to achieve the effect of the present invention, different steps do not necessarily need to be executed in such a sequence, and they may be executed simultaneously (in parallel) or in other sequences, and these changes are all within the protection scope of the present invention.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating a main structure of an air conditioner model selection system according to an embodiment of the present invention. As shown in fig. 2, the air conditioner model selection system in the embodiment of the present invention mainly includes an input parameter obtaining device 11, a cold water temperature correction device 12, a target parameter obtaining device 13, and a target parameter calculating device 14. Specifically, the input parameter acquiring device 11 may be configured to acquire air conditioner selection input parameters including a cold water temperature input value, a heat exchange pipe fouling coefficient, a cooling capacity input value, and one or more heat exchange device types. The cold water temperature correction device 12 may be configured to calculate a cold water correction temperature based on the heat exchange tube fouling factor, and perform a correction calculation on the cold water temperature input value based on the cold water correction temperature to obtain a corrected cold water temperature. The target parameter obtaining device 13 may be configured to obtain, based on a one-to-one correspondence relationship among preset cooling capacity, cooling power, cold water temperature, and heat exchanger type, and according to the corrected cold water temperature, cooling capacity input value, and heat exchanger type, a plurality of cold water temperatures that are close to the corrected cold water temperature, a plurality of cooling capacities that are close to the cooling capacity input value, and a plurality of corresponding cooling powers that are respectively corresponding to each type of heat exchanger. The target parameter calculation device 14 may be configured to perform interpolation calculation according to the corrected cold water temperature and the refrigeration quantity input value, and the acquired multiple cold water temperatures, multiple refrigeration quantities, and multiple refrigeration powers corresponding to each type of heat exchange device, acquire and output the refrigeration powers corresponding to each type of heat exchange device under the condition of the corrected cold water temperature and the refrigeration quantity input value according to the calculation result, and calculate the pressure drop corresponding to each type of heat exchange device according to the refrigeration quantity input value and the refrigeration power, so that the heat exchange device of the corresponding type can be selected according to the pressure drop and the preset pressure drop requirement. The pressure drop is the pressure drop between the cold water inflow side and the cold water outflow side in the heat exchange device, and the corrected cold water temperature is the chilled water outlet water temperature or the cooling water inlet water temperature. In one embodiment, the description of the specific implementation function may be referred to in steps S101 to S105.

In one embodiment, the system shown in fig. 2 further includes an air conditioning parameter calculation device, which may be configured to perform the following operations:

step S1: and respectively calculating a first refrigerating capacity calculation value corresponding to each preset target load grade by taking the refrigerating capacity input value as the full-load refrigerating capacity.

Step S2: judging whether the air conditioner type selection input parameters comprise variable flow parameters or not; if yes, go to step S3; if not, go to step S4.

Step S3: acquiring a first load grade input value in the variable flow parameter and judging whether a preset target load grade is less than or equal to the first load grade input value or not; if yes, go to step S4; if not, go to step S5.

Step S4: based on the preset one-to-one correspondence relationship among the refrigerating capacity, the refrigerating power, the cold water temperature and the cold water flow and according to the first refrigerating capacity calculation value and the cold water flow input value in the air conditioner type selection input parameter, obtaining a plurality of refrigerating capacities close to the first refrigerating capacity calculation value, a plurality of cold water flows close to the cold water flow input value, a plurality of corresponding refrigerating powers and a plurality of cold water temperatures; and carrying out interpolation calculation according to the first refrigerating capacity calculated value, the cold water flow input value, the acquired refrigerating capacities, the refrigerating powers and the cold water temperatures, acquiring and outputting the refrigerating power and the cold water temperature corresponding to the preset target load grade under the condition of the first refrigerating capacity calculated value and the cold water flow input value according to the calculation result, and calculating the air conditioner energy efficiency ratio according to the first refrigerating capacity calculated value and the refrigerating power obtained by interpolation calculation.

Step S5: based on the preset one-to-one correspondence relationship among the refrigerating capacity, the refrigerating power, the cold water temperature and the cold water flow and according to the first refrigerating capacity calculated value, obtaining a plurality of refrigerating capacities close to the first refrigerating capacity calculated value and a plurality of corresponding refrigerating powers, cold water temperatures and cold water flows; and performing interpolation calculation according to the first refrigerating capacity calculation value and the obtained plurality of refrigerating capacities, refrigerating powers, cold water temperatures and cold water flows, obtaining and outputting the refrigerating powers, cold water temperatures and cold water flows corresponding to the preset target load level under the condition of the first refrigerating capacity calculation value according to the calculation result, and calculating the air conditioner energy efficiency ratio according to the first refrigerating capacity calculation value and the refrigerating powers obtained through interpolation calculation. In one embodiment, the detailed implementation functions of the air conditioner parameter calculating device may be described in reference to steps S201 to S206.

In one embodiment, the air conditioning parameter calculating means may be further configured to perform the following operations after step S4 or step S5 when the air conditioning selection type input parameter further includes a variable water temperature parameter:

acquiring a second load grade input value and a variable water temperature input value in the variable water temperature parameter; according to the second load grade input value, the variable water temperature input value and the cold waterCalculating a cold water temperature calculation value corresponding to each preset target load grade according to the temperature input value and a method shown in a formula (4); based on the preset one-to-one correspondence relationship among the refrigerating capacity, the refrigerating power, the cold water temperature and the cold water flow and according to the cold water temperature calculation value T_{n _ calculation}Obtaining a calculated value T of the temperature of the cold water according to the specific cold water flow parameter_{n _ calculation}A plurality of proximate cold water temperatures, a plurality of cold water flows proximate to a particular cold water flow parameter, and a corresponding plurality of refrigeration capacities and a plurality of refrigeration powers; calculating the value T according to the temperature of cold water_{n _ calculation}Interpolation calculation is carried out on the parameters of the specific cold water flow, the obtained multiple cold water temperatures, the obtained multiple cold water flows, the obtained multiple refrigeration amounts and the obtained multiple refrigeration powers, and a calculated value T at the cold water temperature is obtained and output according to the calculation result_{n _ calculation}Calculating the energy efficiency ratio of the air conditioner according to the refrigerating capacity and the refrigerating power, wherein the refrigerating capacity and the refrigerating power correspond to a preset target load grade under the condition of a specific cold water flow parameter; wherein the specific cold water flow parameter is a cold water flow input value among the air conditioner selection input parameters when the step S4 is performed, and the specific cold water flow parameter is a cold water flow output according to the interpolation calculation result of the step S5 when the step S5 is performed. In one embodiment, the description of the specific implementation function may be referred to in steps S207 to S210.

respectively calculating a second refrigerating capacity calculation value corresponding to each preset target load grade by taking the target refrigerating capacity as the full-load refrigerating capacity; acquiring a first refrigerating capacity calculated value corresponding to a preset target load grade, and outputting refrigerating power and cold water temperature corresponding to the preset target load grade under the condition of the first refrigerating capacity calculated value according to an interpolation calculation result in the step S4 or the step S5; calculating and outputting an actual target power value corresponding to a preset target load grade according to the first refrigerating capacity calculated value, the second refrigerating capacity calculated value, the refrigerating power and the cold water temperature and a method shown in a formula (5); based on preset refrigerating capacity, refrigerating power, air conditioner energy efficiency ratio, one-to-one correspondence relationship between cold water temperature and cold water flow and according to the actual target power value and the specific cold water flow parameter, a plurality of refrigerating powers close to the actual target power value, a plurality of cold water flows close to the specific cold water flow parameter, a plurality of corresponding refrigerating capacities, a plurality of cold water temperatures and a plurality of air conditioner energy efficiency ratios are obtained. And carrying out interpolation calculation according to the actual target power value and the specific cold water flow parameter, and the obtained multiple cold water temperatures, multiple cold water flows, multiple refrigeration amounts, multiple refrigeration powers and multiple air conditioner energy efficiency ratios, and obtaining and outputting the cold water temperature, the refrigeration amount and the air conditioner energy efficiency ratio corresponding to the target load grade preset under the conditions of the actual target power value and the specific cold water flow parameter according to the calculation result. In one embodiment, the description of the specific implementation function may be referred to in steps S211 to S213.

The technical principles, the solved technical problems, and the generated technical effects of the air conditioner type selection system described above for implementing the embodiment of the air conditioner type selection method shown in fig. 1 are similar, and it can be clearly understood by those skilled in the art that for convenience and brevity of description, the specific working process and related descriptions of the air conditioner type selection system may refer to the contents described in the embodiment of the air conditioner type selection method, and are not described herein again.

In yet another embodiment of the present invention, a storage device is also provided, in which the storage device stores a plurality of program codes adapted to be loaded and executed by a processor to perform the method steps of the aforementioned air conditioner selection method embodiment.

In a further embodiment of the present invention, there is also provided a control apparatus in which the control apparatus comprises a processor and a storage device, the storage device being adapted to store a plurality of program codes adapted to be loaded and run by the processor to perform the method steps as described in the aforementioned air conditioner model selection method embodiment. For convenience of explanation, only the parts related to the embodiments of the present specification are shown, and specific technical details are not disclosed, so that reference is made to the method parts of the embodiments of the present specification. The control device can be a server device formed by various electronic devices, a PC computer, a network cloud server, or even a server function arranged on any electronic device such as a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a desktop computer, and the like.

It will be understood by those skilled in the art that all or part of the flow of the method according to the above-described embodiment may be implemented by a computer program, which may be stored in a computer-readable storage medium and used to implement the steps of the above-described embodiments of the method when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying said computer program code, media, usb disk, removable hard disk, magnetic diskette, optical disk, computer memory, read-only memory, random access memory, electrical carrier wave signals, telecommunication signals, software distribution media, etc. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.

Further, it should be understood that, since the modules are only configured to illustrate the functional units of the system of the present invention, the corresponding physical devices of the modules may be the processor itself, or a part of software, a part of hardware, or a part of a combination of software and hardware in the processor. Thus, the number of individual modules in the figures is merely illustrative.

Those skilled in the art will appreciate that the various modules in the system may be adaptively split or combined. Such splitting or combining of specific modules does not cause the technical solutions to deviate from the principle of the present invention, and therefore, the technical solutions after splitting or combining will fall within the protection scope of the present invention.

So far, the technical solution of the present invention has been described with reference to one embodiment shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

23页详细技术资料下载

上一篇：一种医用注射器针头装配设备

下一篇：一种基于热电耦合的能量优化配置与评估方法

Air conditioner model selection method, system and device

相关技术

网友询问留言