阅读说明：本技术 一种基于绿色能源利用的楼宇多联供系统及其控制方法 (Building multi-joint supply system based on green energy utilization and control method thereof ) 是由 丁鑫 于 2021-02-08 设计创作，主要内容包括：本发明涉及一种基于绿色能源利用的楼宇多联供系统及其控制方法,系统由光电单元、光热单元、蒸汽压缩循环单元、热水单元及控制单元组成,光电单元为光热单元、蒸汽压缩循环单元及热水单元供电,系统充分利用太阳能,通过光伏光热阵列模块吸热,实现循环水的一次加热升温,进而在循环水泵的作用下输送至所述蒸发器作为低品位热源,通过蒸汽压缩循环对循环水进行二次升温,系统所有用电设备及用电器件所需电完全可由光伏光热阵列模块产生的电进行提供,无需其他能源输入,可实现系统冷、热、电多联供的零电耗运行,同时彻底克服了一般空气源热水系统冬季蒸发器结霜问题。(The invention relates to a building multi-combined supply system based on green energy utilization and a control method thereof, the system consists of a photoelectric unit, a photo-thermal unit, a vapor compression circulating unit, a hot water unit and a control unit, the photoelectric unit supplies power for the photo-thermal unit, the vapor compression circulating unit and the hot water unit, the system fully utilizes solar energy, absorbs heat through a photovoltaic photo-thermal array module, realizes the primary heating and temperature rise of circulating water, then the heat is transmitted to the evaporator as a low-grade heat source under the action of a circulating water pump, the circulating water is heated secondarily through vapor compression circulation, all the electric equipment and electric appliances of the system can be completely supplied with electricity generated by the photovoltaic photo-thermal array module without inputting other energy sources, the system can realize zero power consumption operation of multi-combined supply of cold, heat and electricity, and simultaneously thoroughly solves the problem that an evaporator of a common air source hot water system frosts in winter.)

1. A building multi-union system based on green energy utilization is characterized in that: comprises a photoelectric unit, a photo-thermal unit, a vapor compression circulation unit, a hot water unit and a control unit;

s1, the photoelectric unit comprises a photovoltaic photo-thermal array module (1), a storage battery (2), a direct current load (3), an inverter (4) and an alternating current load (5), the photovoltaic photo-thermal array module (1) is connected with the storage battery (2), the storage battery (2) is connected with the direct current load (3), and the storage battery (2) is further connected with the alternating current load (5) through the inverter (4);

s2, the photo-thermal unit comprises a photovoltaic photo-thermal array module (1), a circulating water pump (6), a first valve (a), a heat storage water tank (9), a second valve (b), a third valve (c), an evaporator (7) and a fourth valve (d), wherein the photovoltaic photo-thermal array module (1), the circulating water pump (6), the first valve (a), the heat storage water tank (9) and the second valve (b) are sequentially connected through pipelines to form an independent heat supply loop, and the photovoltaic photo-thermal array module (1), the circulating water pump (6), the third valve (c), the evaporator (7) and the fourth valve (d) are sequentially connected through pipelines to form a combined heat supply loop;

s3, the steam compression circulation unit comprises an evaporator (7), a compressor (8), a hot water storage tank (9) and a throttling device (10) which are sequentially connected through pipelines;

s4, the hot water unit comprises a hot water pump (11), an expansion water tank (12) and a hot water storage tank (9), and the expansion water tank (12), the hot water pump (11) and the hot water storage tank (9) are connected through pipelines;

s5, the photoelectric unit does the light and heat unit the vapor compression circulation unit reaches the hot water unit power supply, the photoelectric unit passes through photovoltaic light and heat array module (1) with the light and heat unit is connected, the light and heat unit passes through evaporimeter (7) and heat storage water tank (9) with the vapor compression circulation unit is connected, the hot water unit passes through heat storage water tank (9) with the light and heat unit the vapor compression circulation unit is connected.

2. The building multi-union system based on green energy utilization as claimed in claim 1, wherein: the throttling device (10), the first valve (a), the second valve (b), the third valve (c) and the fourth valve (d) are all connected with the storage battery (2) through electric wires; the compressor (8), the circulating water pump (6) and the hot water pump (11) are connected with the storage battery (2) or the inverter (4) through electric wires.

3. The building multi-union system based on green energy utilization as claimed in claim 1, wherein: the adjacent channels of the evaporator (7) respectively flow through the refrigerant and the water, the flow direction of the refrigerant is generally opposite to that of the water, and the outer side of the evaporator (7) is wrapped with heat insulation cotton for isolating heat loss.

4. The building multi-union system based on green energy utilization as claimed in claim 1, wherein: the inside of heat storage water tank (9) is provided with condenser pipe and heating pipe, the condenser pipe with the heating pipe shape all is the coil pipe setting, the condenser pipe with the axial direction of heating pipe with the axial direction of heat storage water tank (9) is the same.

5. The building multi-union system based on green energy utilization as claimed in claim 4, wherein: the control unit can switch two modes of solar independent heating and combined heating modes by controlling the states of the circulating water pump (6), the compressor (8), the throttling device (10), the hot water pump (11), the first valve (a), the second valve (b), the third valve (c) and the fourth valve (d).

6. A building multi-combined supply system control method based on green energy utilization is applied to the building multi-combined supply system based on green energy utilization of claim 5, and is characterized in that: under the independent heat supply mode of solar energy, open circulating water pump (6), first valve (a), second valve (b) and hot-water pump (11), close third valve (c) and fourth valve (d), close compressor (8) and throttling arrangement (10), photovoltaic light and heat array module (1) absorbed heat heats the circulating water and heaies up, and the circulating water after the intensification passes through circulating water pump (6) carry to in the middle of heat storage water tank (9), circulating water in the middle of heat storage water tank (9) gives the heat for the hot water in the middle of the hot water unit, and hot water is in be carried to the user under the effect of hot-water pump (11), accomplishes the independent heat supply of solar energy.

7. The building multi-union system control method based on green energy utilization as claimed in claim 6, wherein: when solar radiation cannot independently meet the heat supply requirement, a system runs a combined heat supply mode, the circulating water pump (6), the compressor (8), the throttling device (10) and the hot water pump (11) are started, the third valve (c) and the fourth valve (d) are started, the first valve (a) and the second valve (b) are closed, circulating water generated by heat absorption of the photovoltaic and photothermal array module (1) is conveyed to the evaporator (7) through the circulating water pump (6) to serve as a low-grade heat source of the steam compression circulating unit, heat of the circulating water is absorbed by a refrigerant in the evaporator (7) to be gasified, the gasified refrigerant gas is compressed and conveyed into the condensing pipe through the compressor (8), and the refrigerant gas in the condensing pipe transfers heat to water in the heat storage water tank (9) through phase-change condensation, the water in the heat storage water tank (9) transfers the absorbed heat to the hot water in the hot water unit, and the hot water is conveyed to a user under the action of the hot water pump (11) to complete combined heat supply.

Technical Field

The invention relates to the technical field of heat pumps, in particular to a building multi-combined supply system based on green energy utilization and a control method thereof.

Background

The solar energy is inexhaustible, is one of the most environment-friendly renewable energy sources, can perform photovoltaic power generation, and also can generate heat through photo-thermal conversion, however, the solar energy is influenced by weather, has the problem of discontinuity and instability, has certain limitation when being used alone, and still needs the assistance of other heat sources to meet all-weather heating and hot water supply.

The heat pump has the advantages of energy conservation, environmental protection, reliable performance and the like, is gradually widely applied to heating, but under the outdoor low-temperature condition, the commonly used air source heat pump has obvious energy efficiency attenuation and serious frosting problem, and is difficult to stably meet the heating requirement.

The solar energy is fully utilized to carry out photovoltaic power generation and heating, and meanwhile, zero-energy-consumption operation of heat supply and heating is realized through the heat pump, so that the solar energy heat pump system has important significance for building green and low-carbon cities and environment-friendly society.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a building multi-generation system based on green energy utilization and a control method thereof, the system fully utilizes solar energy, absorbs heat through a photovoltaic and photo-thermal array module to realize primary heating and temperature rise of circulating water, then the circulating water is conveyed to an evaporator to be used as a low-grade heat source under the action of a circulating water pump to carry out secondary temperature rise on the circulating water through vapor compression circulation, all power consumption equipment and power consumption parts of the system can be completely provided by the power generated by the photovoltaic and photo-thermal array module, other energy input is not needed, zero power consumption operation of multi-generation of cold, heat and power of the system can be realized, and the frosting problem of an evaporator of a common air source hot water system in winter is thoroughly solved.

In order to achieve the purpose, the invention provides the following technical scheme:

a building multi-connection supply system based on green energy utilization comprises a photoelectric unit, a photo-thermal unit, a vapor compression circulation unit, a hot water unit and a control unit;

s1, the photoelectric unit comprises a photovoltaic photo-thermal array module, a storage battery, a direct current load, an inverter and an alternating current load, the photovoltaic photo-thermal array module is connected with the storage battery, the storage battery is connected with the direct current load, and the storage battery is further connected with the alternating current load through the inverter;

s2, the photo-thermal unit comprises a photovoltaic photo-thermal array module, a circulating water pump, a first valve, a heat storage water tank, a second valve, a third valve, an evaporator and a fourth valve, wherein the photovoltaic photo-thermal array module, the circulating water pump, the first valve, the heat storage water tank and the second valve are sequentially connected through a pipeline to form an independent heat supply loop, and the photovoltaic photo-thermal array module, the circulating water pump, the third valve, the evaporator and the fourth valve are sequentially connected through a pipeline to form a combined heat supply loop;

s3, the steam compression circulation unit comprises an evaporator, a compressor, a heat storage water tank and a throttling device which are sequentially connected through pipelines;

s4, the hot water unit comprises a hot water pump, an expansion water tank and a hot water storage tank, and the expansion water tank, the hot water pump and the hot water storage tank are connected through pipelines;

s5 the photoelectric unit does the light and heat unit the vapor compression circulation unit reaches the hot water unit power supply, the photoelectric unit passes through photovoltaic light and heat array module with the light and heat unit is connected, the light and heat unit passes through the evaporimeter reaches the heat storage water tank with the vapor compression circulation unit is connected, the hot water unit passes through the heat storage water tank with the light and heat unit the vapor compression circulation unit is connected.

By adopting the technical scheme, when the system operates in the solar independent heat supply mode, hot water generated by the photovoltaic photo-thermal array module is directly conveyed into the heat storage water tank, heating is not needed by a heat pump circulating unit, and solar energy is inexhaustible, so that the operation energy consumption of the system is reduced; meanwhile, direct current generated by the photovoltaic photo-thermal array module is stored through the photoelectric unit and is used for the photo-thermal unit, the steam compression circulating unit and the hot water unit, and the system does not need external energy sources and plays a role in energy conservation. When solar irradiation can not independently satisfy the heat supply demand, water generated by the photovoltaic photo-thermal array module is used as a low-grade heat source of the vapor compression circulating unit to be supplied to a refrigerant to absorb heat, so that the vapor compression circulating unit further utilizes the low-grade heat source, the solar low-grade energy is fully utilized, the utilization rate of the system to energy is improved, the problems of obvious energy efficiency attenuation and frosting of an air source hot water system are avoided, and the stability of the system is improved.

The invention is further configured to: the throttling device, the first valve, the second valve, the third valve and the fourth valve are all connected with the storage battery through electric wires; the compressor, the circulating water pump and the hot water pump are all connected with the storage battery or the inverter through electric wires.

By adopting the technical scheme, the electricity of the photoelectric unit can be output in a direct current mode and also in an alternating current mode, so that the photoelectric unit is more suitable for application of various devices in a system, and the adaptability of the system is improved.

The invention is further configured to: the adjacent channels of the evaporator respectively flow through the refrigerant and the water, the flow direction of the refrigerant is generally opposite to that of the water, and the outer side of the evaporator is wrapped with heat insulation cotton for isolating heat loss.

Through adopting above-mentioned technical scheme, the outside parcel of evaporimeter has the heat preservation cotton that isolated heat was lost, plays the heat of isolated evaporimeter and loses the effect.

The invention is further configured to: the inside of heat storage water tank is provided with condenser pipe and heating pipe, the condenser pipe with the heating pipe shape all is the coil pipe setting, the condenser pipe with the axial direction of heating pipe with heat storage water tank's axial direction is the same.

Through adopting above-mentioned technical scheme, promoted the area of contact of condenser pipe, heating pipe and heat storage water tank water, the heat that condenser and heating pipe released is fully absorbed to the water of the heat storage water tank of being convenient for, has reduced the loss of energy.

The invention is further configured to: the control unit can switch two modes of solar independent heat supply and combined heat supply by controlling the states of the circulating water pump, the compressor, the throttling device, the hot water pump, the first valve, the second valve, the third valve and the fourth valve.

Preferably, under the independent heat supply mode of solar energy, open circulating water pump first valve the second valve reaches the hot-water pump, close third valve reaches the fourth valve is closed the compressor reaches throttling arrangement, photovoltaic light and heat array module absorbs the heat and heats the circulating water, and circulating water after the intensification passes through circulating water pump delivers to in the heat storage water tank, the circulating water among the heat storage water tank gives the heat to the hot water among the hot water unit, and hot water is in the effect of hot-water pump is carried to the user down, accomplishes the independent heat supply of solar energy.

Preferably, when solar radiation cannot independently meet the heat supply requirement, the system operates in a combined heat supply mode, the circulating water pump, the compressor, the throttling device and the hot water pump are started, the third valve and the fourth valve are started, the first valve and the second valve are closed, circulating water generated by heat absorption of the photovoltaic and photothermal array module is conveyed to the evaporator through the circulating water pump to serve as a low-grade heat source of the steam compression circulating unit, a refrigerant in the evaporator absorbs heat of the circulating water to be gasified, gasified refrigerant gas is compressed and conveyed to the condenser pipe through the compressor, the refrigerant gas in the condenser pipe transfers heat to water in the heat storage water tank through phase change condensation, and the water in the heat storage water tank transfers the absorbed heat to hot water in the hot water unit, the hot water is delivered to the user under the action of the hot water pump, and the combined heat supply is completed.

In conclusion, the invention has the following beneficial effects:

1. according to the invention, solar energy is fully utilized, heat is absorbed by the photovoltaic photo-thermal array module, primary heating and temperature rise of circulating water are realized, then the circulating water is conveyed to the evaporator under the action of the circulating water pump to be used as a low-grade heat source, and secondary temperature rise is carried out on the circulating water through vapor compression circulation, so that compared with an electric water heating system and an air energy water heating system, the power consumption is greatly reduced, and meanwhile, the problem that an evaporator of a common air source water heating system frosts in winter is thoroughly solved;

2. direct current generated by the photovoltaic photo-thermal array module is stored in a storage battery, and the direct current in the storage battery is directly used by a direct current load in a system or is converted into alternating current by an inverter to be used by an alternating current load in the system;

3. the solar water heater fully utilizes solar energy, improves the quality of water through steam compression circulation, has obvious energy-saving effect, can completely supply electricity required by all electric equipment and electric appliances of the system by the electricity generated by the photovoltaic photo-thermal array module, does not need other energy input, and realizes zero-power-consumption operation of multi-supply of cold, heat and electricity of the system.

Drawings

FIG. 1 is a schematic diagram of the system of the present embodiment;

fig. 2 is a diagram illustrating the circulating water pump, the compressor, the throttle device, the hot water pump and the valve switching in two operation modes according to the embodiment.

Reference numerals: 1. a photovoltaic photo-thermal array module; 2. a storage battery; 3. a direct current load; 4. an inverter; 5. an alternating current load; 6. a water circulating pump; 7. an evaporator; 8. a compressor; 9. a heat storage water tank; 10. a throttling device; 11. a hot water pump; 12. an expansion tank; a. a first valve; b. a second valve; c. a third valve; d. and a fourth valve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2, the building multi-connection supply system based on green energy utilization disclosed by the invention comprises a photoelectric unit, a photo-thermal unit, a vapor compression cycle unit, a hot water unit and a control unit;

the photovoltaic unit comprises a photovoltaic photo-thermal array module 1, a storage battery 2, a direct current load 3, an inverter 4 and an alternating current load 5, the photovoltaic photo-thermal array module 1 is connected with the storage battery 2, the storage battery 2 is connected with the direct current load 3, and the storage battery 2 is also connected with the alternating current load 5 through the inverter 4;

the photo-thermal unit comprises a photovoltaic photo-thermal array module 1, a circulating water pump 6, a first valve a, a heat storage water tank 9, a second valve b, a third valve c, an evaporator 7 and a fourth valve d, wherein the photovoltaic photo-thermal array module 1, the circulating water pump 6, the first valve a, the heat storage water tank 9 and the second valve b are sequentially connected through pipelines to form an independent heat supply loop, and the photovoltaic photo-thermal array module 1, the circulating water pump 6, the third valve c, the evaporator 7 and the fourth valve d are sequentially connected through pipelines to form a combined heat supply loop;

the vapor compression circulation unit comprises an evaporator 7, a compressor 8, a heat storage water tank 9 and a throttling device 10 which are sequentially connected through pipelines;

the hot water unit comprises a hot water pump 11, an expansion water tank 12 and a heat storage water tank 9, and the expansion water tank 12, the hot water pump 11 and the heat storage water tank 9 are connected through pipelines;

the photoelectric unit is the light and heat unit, the power supply of vapor compression circulation unit and hot water unit, and the photoelectric unit is connected with the light and heat unit through photovoltaic light and heat array module 1, and the light and heat unit is connected with the vapor compression circulation unit through evaporimeter 7 and heat storage water tank 9, and the hot water unit is connected with light and heat unit, vapor compression circulation unit through heat storage water tank 9.

The throttling device 10, the first valve a, the second valve b, the third valve c and the fourth valve d are all connected with the storage battery 2 through electric wires; the compressor 8, the circulating water pump 6 and the hot water pump 11 are connected with the storage battery 2 or the inverter 4 through electric wires.

The adjacent channels of the evaporator 7 respectively flow through the refrigerant and the water, the flow direction of the refrigerant is generally opposite to that of the water, and the outer side of the evaporator 7 is wrapped with heat insulation cotton for isolating heat loss.

The inside of heat storage water tank 9 is provided with condenser pipe and heating pipe, and condenser pipe and heating pipe shape all are the coil pipe setting, and the axial direction of condenser pipe and heating pipe is the same with heat storage water tank 9's axial direction.

The control unit can switch two modes of solar independent heating and combined heating modes by controlling the states of the circulating water pump 6, the compressor 8, the throttling device 10, the hot water pump 11, the first valve a, the second valve b, the third valve c and the fourth valve d.

A building multi-combined supply system control method based on green energy utilization comprises the following steps:

under the independent heat supply mode of solar energy, open circulating water pump 6, first valve a, second valve b and hot-water pump 11, close third valve c and fourth valve d, close compressor 8 and throttling arrangement 10, photovoltaic light and heat array module 1 absorbs the heat and heats the circulating water and heaies up, circulating water after the intensification is carried to heat storage water tank 9 in the middle of through circulating water pump 6, circulating water in the middle of heat storage water tank 9 gives the heat for the hot water in the middle of the hot water unit, hot water is carried to the user under the effect of hot-water pump 11, accomplish the independent heat supply of solar energy.

When solar radiation cannot independently meet the heat supply requirement, the system operates in a combined heat supply mode, a circulating water pump 6, a compressor 8, a throttling device 10 and a hot water pump 11 are started, a third valve c and a fourth valve d are started, a first valve a and a second valve b are closed, circulating water generated by heat absorption of the photovoltaic and photothermal array module 1 is conveyed to an evaporator 7 through the circulating water pump 6 to serve as a low-grade heat source of a vapor compression circulating unit, a refrigerant in the evaporator 7 absorbs heat of the circulating water for gasification, the gasified refrigerant gas is compressed and conveyed to a condensing pipe through the compressor 8, refrigerant gas in the condensation pipe transfers heat to water in the heat storage water tank 9 through phase change condensation, the water in the heat storage water tank 9 transfers the absorbed heat to hot water in the hot water unit, and the hot water is conveyed to a user under the action of the hot water pump 11 to complete combined heat supply.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.