阅读说明：本技术 一种储热材料的储热密度测试方法及系统 (Heat storage density testing method and system for heat storage material ) 是由 邓占锋 常亮 徐桂芝 赵波 杨岑玉 金翼 胡晓 张高群 杜兆龙 于 2018-06-06 设计创作，主要内容包括：本发明公开了一种储热材料的储热密度测试方法及系统,其中,该方法包括：测量加热装置空置时从第一温度加热至第二温度时的第一能耗,以及加热装置中放入待测储热材料后从第一温度加热至第二温度时的第二能耗,根据待测储热材料的质量、第一温度、第二温度、第一能耗及第二能耗计算待测储热材料的储热密度。通过该测量方法测得储热材料的储热密度,由于考虑了实际应用中储热材料以一定规模的成型产品被使用的因素,相比于微量测试法来说,更加贴近实际应用情况。因此,能够更加准确地反映整块大模块储热材料的储热密度。(The invention discloses a method and a system for testing heat storage density of a heat storage material, wherein the method comprises the following steps: and measuring first energy consumption when the heating device is heated from a first temperature to a second temperature when the heating device is vacant and second energy consumption when the heating device is heated from the first temperature to the second temperature after the heat storage material to be detected is put into the heating device, and calculating the heat storage density of the heat storage material to be detected according to the mass of the heat storage material to be detected, the first temperature, the second temperature, the first energy consumption and the second energy consumption. The heat storage density of the heat storage material is measured by the measuring method, and the heat storage density is closer to the actual application condition compared with a trace testing method due to the fact that the factors that the heat storage material is used in a molded product with a certain scale in the actual application are considered. Therefore, the heat storage density of the whole large-module heat storage material can be reflected more accurately.)

1. A heat storage density test method of a heat storage material is characterized by comprising the following steps:

Measuring first energy consumption when the heating device is empty and heated from a first temperature to a second temperature, and measuring second energy consumption when the heating device is filled with a heat storage material to be tested and heated from the first temperature to the second temperature;

and calculating the heat storage density of the heat storage material to be detected according to the mass of the heat storage material to be detected, the first temperature, the second temperature, the first energy consumption and the second energy consumption.

2. The method for testing the heat storage density of the heat storage material as claimed in claim 1, wherein the heat storage density of the heat storage material is calculated according to the following formula:

Wherein H is the heat storage density, M is the mass of the heat storage material to be tested, and T₀Is a first temperature, T₁At a second temperature, E₀for the first energy consumption, E₁Is the second energy consumption.

3. The method for testing the heat storage density of a heat storage material as claimed in claim 1, further comprising, before the step of measuring the first energy consumption when the heating device is empty and heated from the first temperature to the second temperature:

And testing the reliability of the heating device.

4. The method for testing the heat storage density of the heat storage material as claimed in claim 3, wherein the step of testing the reliability of the heating device comprises:

Acquiring energy consumption changes of heating the vacant heating device from a first temperature to a second temperature at least twice;

Generating energy consumption comparison according to the energy consumption change, and judging whether the energy consumption comparison is smaller than a preset value;

And when the energy consumption comparison is smaller than the preset value, judging that the heating device is reliable.

5. The method for testing the heat storage density of the heat storage material as claimed in any one of claims 1 to 4, wherein the second temperature is higher than the phase transition temperature of the heat storage material to be tested.

6. A heat storage density test system of a heat storage material, comprising: a heating device, an electric energy analysis device and a data processing device, wherein,

The heating device is used for heating from a first temperature to a second temperature when the heating device is vacant and heating from the first temperature to the second temperature after the heat storage material to be detected is placed in the heating device;

the electric energy analysis device is used for measuring first energy consumption when the heating device is empty and heated from a first temperature to a second temperature, and measuring second energy consumption when the heating device is filled with a heat storage material to be measured and heated from the first temperature to the second temperature;

the data processing device is used for acquiring the mass, the first temperature, the second temperature, the first energy consumption and the second energy consumption of the heat storage material to be detected, and calculating the heat storage density of the heat storage material to be detected according to the mass, the first temperature, the second temperature, the first energy consumption and the second energy consumption of the heat storage material to be detected.

7. The system for testing the heat storage density of the heat storage material as claimed in claim 6, wherein the data processing device calculates the heat storage density of the heat storage material to be tested according to the following formula:

Wherein H is heat storage density, M is preset mass, and T₀Is a first temperature, T₁At a second temperature, E₀for the first energy consumption, E₁Is the second energy consumption.

Technical Field

the invention relates to the technical field of phase change heat storage, in particular to a heat storage density testing method and system for a heat storage material.

Background

The traditional heat storage density test method is obtained by firstly measuring the specific heat capacity of a material by utilizing a differential scanning calorimetry method, a microcalorimetry method or an adiabatic calorimetry method and other microanalysis methods and then integrating the specific heat capacity and the temperature difference, and if phase change occurs in a temperature range, the phase change enthalpy of the material is added. In the traditional method, when the specific heat capacity of the material is measured, the sample is generally sampled at the mg level, and the measurement result is high in accuracy but only aims at a trace sample at the mg level, so that the method is not widely applicable.

In the practical application process of the heat storage material, the volume and the mass of the heat storage module are relatively large (generally above the kg grade), and the heat storage material in the heat storage module is likely to have the condition of uneven distribution, so that the specific heat result obtained by a microanalysis method test cannot accurately reflect the heat storage density of the whole large module heat storage material.

Disclosure of Invention

Therefore, the invention provides a method and a system for testing the heat storage density of a heat storage material, and solves the problem that the heat storage density of a large-module heat storage material cannot be accurately reflected by the result of a microcalorimetry test in the prior art.

The heat storage density testing method of the heat storage material provided by the embodiment of the invention comprises the following steps:

Measuring first energy consumption when the heating device is empty and heated from a first temperature to a second temperature, and measuring second energy consumption when the heating device is filled with a heat storage material to be tested and heated from the first temperature to the second temperature; and calculating the heat storage density of the heat storage material to be detected according to the mass of the heat storage material to be detected, the first temperature, the second temperature, the first energy consumption and the second energy consumption.

preferably, the heat storage density of the heat storage material is calculated according to the following formula:

Wherein H is the heat storage density, M is the mass of the heat storage material to be tested, and T₀is a first temperature, T₁At a second temperature, E₀For the first energy consumption, E₁Is the second energy consumption.

Preferably, before the step of measuring the first energy consumption when the heating device is empty and heated from the first temperature to the second temperature, the method further comprises: and testing the reliability of the heating device.

preferably, the step of performing a reliability test on the heating device specifically includes:

Acquiring energy consumption changes of heating the vacant heating device from a first temperature to a second temperature at least twice; generating energy consumption comparison according to the energy consumption change, and judging whether the energy consumption comparison is smaller than a preset value; and when the energy consumption comparison is smaller than the preset value, judging that the heating device is reliable.

Preferably, the second temperature is higher than the phase transition temperature of the heat storage material to be measured.

The embodiment of the invention also provides a heat storage density testing system of the heat storage material, which comprises: the device comprises a heating device, an electric energy analysis device and a data processing device, wherein the heating device is used for heating from a first temperature to a second temperature when the device is vacant and heating from the first temperature to the second temperature after a heat storage material to be detected is placed in the device; the electric energy analysis device is used for measuring first energy consumption when the heating device is empty and heated from a first temperature to a second temperature, and measuring second energy consumption when the heating device is filled with a heat storage material to be measured and heated from the first temperature to the second temperature; the data processing device is used for acquiring the mass, the first temperature, the second temperature, the first energy consumption and the second energy consumption of the heat storage material to be detected, and calculating the heat storage density of the heat storage material to be detected according to the mass, the first temperature, the second temperature, the first energy consumption and the second energy consumption of the heat storage material to be detected.

preferably, the data processing device calculates the heat storage density of the heat storage material to be measured according to the following formula:

Wherein H is heat storage density, M is preset mass, and T₀Is a first temperature, T₁At a second temperature, E₀for the first energy consumption, E₁is the second energy consumption.

The technical scheme of the invention has the following advantages:

the embodiment of the invention provides a method and a system for testing the heat storage density of a heat storage material, wherein the method comprises the following steps: measuring the energy consumption when the heating device is heated from the normal temperature to a temperature higher than the phase-change temperature when the heating device is empty, and the energy consumption when the heating device is heated from the normal temperature to a temperature higher than the phase-change temperature after the heat storage material to be detected is put into the heating device, and calculating the heat storage density of the heat storage material to be detected according to the mass of the heat storage material to be detected, the energy consumption in the two heating processes and the temperature values before and after heating. The heat storage density of the heat storage material is measured by the measuring method, and the heat storage density is closer to the actual application condition compared with a trace testing method due to the fact that the factors that the heat storage material is used in a molded product with a certain scale in the actual application are considered. Therefore, the heat storage density of the whole large-module heat storage material can be reflected more accurately.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

fig. 1 is a flowchart of a specific example of a method for testing a heat storage density of a heat storage material according to an embodiment of the present invention;

Fig. 2 is a flowchart of another specific example of a method for testing a heat storage density of a heat storage material according to an embodiment of the present invention;

FIG. 3 is a graph comparing the energy consumption curves of the heating furnace according to the embodiment of the present invention after the heating furnace is empty-fired under the same temperature raising condition;

FIG. 4 is a graph showing the comparison of energy consumption between an empty-burning heating furnace and a heat storage brick in the embodiment of the present invention;

Fig. 5 is a composition diagram of a heat storage density testing system of a heat storage material in an embodiment of the invention.

Detailed Description

the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

in the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

in addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.