CN-115267324-B - Device and method for measuring radiation refrigeration cooling power

Abstract

The application belongs to the field of measuring instruments, and provides a measuring device and a measuring method for radiation refrigeration cooling power, wherein the measuring device comprises a radiating fin, a heat conducting layer, a temperature difference resistor piece, a basal layer and a power meter; the heat-conducting layer is arranged on one side of the hot end of the temperature difference resistor, the radiating fin is arranged at the bottom of the heat-conducting layer, the basal layer is arranged on one side of the cold end of the temperature difference resistor, and the radiation refrigeration cooling material layer to be tested is placed on the upper surface of the basal layer; the power meter is connected with the hot end and the cold end of the thermoelectric resistance piece through wires to form a closed loop. Compared with the traditional cooling power tester, the application can finish the power measurement without additional power supply and additional controllers and heaters, and only needs to place the material to be tested on the surface of the basal layer, and the radiation refrigeration cooling power can be indirectly obtained by collecting the electric power through the power tester, thereby having the characteristics of simple structure and convenient operation.

Inventors

• ZHAN YAOHUI
• ZHOU YUCHENG
• GAO JIALI
• LV CHANGDONG
• ZHANG ZEYU
• WU DI

Assignees

• 苏州大学

Dates

Publication Date

20260512

Application Date

20220809

Claims (8)

1. 1. The measuring device for the radiation refrigeration cooling power is characterized by comprising a radiating fin, a heat conducting layer, a temperature difference resistance piece, a basal layer, a power meter and a heat preservation box, wherein the heat conducting layer is arranged on one side of the hot end of the temperature difference resistance piece, the radiating fin is arranged at the bottom of the heat conducting layer, the basal layer is arranged on one side of the cold end of the temperature difference resistance piece, and a radiation refrigeration cooling material layer to be measured is placed on the upper surface of the basal layer; the heat radiating fin, the heat conducting layer, the temperature difference resistor piece and the basal layer form a temperature difference generating piece together and are used for spontaneous thermoelectric conversion through the temperature difference between the heat radiating fin and the environment when the radiation refrigeration cooling material layer to be detected generates radiation refrigeration cooling effect; The power meter is connected with the hot end and the cold end of the thermoelectric resistor piece through wires to form a closed loop and is used for detecting electric power generated by the thermoelectric generation piece and indirectly calculating the radiation refrigeration cooling power according to the electric power, the top of the heat preservation box is hollowed out and covered with a layer of light-transmitting film, the side wall of the heat preservation box is provided with a plurality of through holes, the thermoelectric resistor piece and the basal layer are arranged inside the heat preservation box, the power meter is arranged outside the heat preservation box, and the heat preservation box is used for providing a stable measuring environment for the thermoelectric generation piece.
2. 2. The device for measuring radiation refrigeration cooling power according to claim 1, wherein the substrate layer is made of metal or glass.
3. 3. The device for measuring radiation refrigeration cooling power according to claim 1, wherein the heat preservation box is made of polystyrene.
4. 4. The device for measuring radiation refrigeration cooling power according to claim 1, wherein the light-transmitting film is made of polyethylene.
5. 5. The device for measuring radiation refrigeration cooling power according to claim 1, further comprising a wireless communication module and an upper computer, wherein data measured in the power meter is transmitted to the upper computer through the wireless communication module, and the upper computer is used for data processing and outputting the radiation refrigeration cooling power of the radiation refrigeration cooling material layer to be measured.
6. 6. The device for measuring radiation refrigeration cooling power according to claim 5, wherein the wireless communication module comprises a WIFI module, a Bluetooth module, an infrared module and an LTE cellular data communication module.
7. 7. The device for measuring radiation refrigeration cooling power according to any one of claims 1 to 6, wherein the temperature difference resistor comprises a plurality of pairs of N-type semiconductor units and P-type semiconductor units, and the N-type semiconductor units and the P-type semiconductor units form a couple pair.
8. 8. A method for measuring radiation refrigeration cooling power is characterized in that a radiation refrigeration cooling material layer to be measured is placed on a substrate layer in the radiation refrigeration cooling power measuring device according to one of claims 1 to 6, the radiation refrigeration cooling material layer to be measured enables the cold end temperature of a temperature difference resistor to be lower than the hot end temperature through radiation refrigeration, a power meter detects electric power in a closed loop, and the electric power is converted into radiation refrigeration cooling power according to a mathematical model relation between the electric power and the radiation refrigeration cooling power.

Description

Device and method for measuring radiation refrigeration cooling power Technical Field The application belongs to the field of measuring instruments, and particularly relates to a measuring device and a measuring method for radiation refrigeration cooling power. Background The main principle of radiation refrigeration is to reflect solar wave band (0.3-2.5 μm) energy and simultaneously improve emissivity of an atmospheric window wave band (the main wave band is 8-13 μm) so as to emit heat to deep space through an atmospheric window, thereby realizing that the temperature can be reduced below the ambient temperature even under the irradiation of the sun. With intensive research into radiation refrigeration technology, measurement of cooling power of materials becomes an indispensable part. The comparison cooling amplitude test is limited by environmental climate, longitude and latitude and the like, and the cooling power measurement can more objectively reflect the cooling performance of the material and is favorable for transverse comparison and standardized measurement. In year 2020, 6 months, the energy science and technology of Ling Xin proposes an integrated device comprising a container with a measuring chamber, an atmospheric reverse radiation simulation component and an atmospheric window simulation component, which is used for measuring radiation cooling power indoors. However, the device is complex, the material is required to be kept consistent with the ambient temperature in a heating mode, and the adjustment time, the overshoot and the no static difference cannot be ensured when the temperature changes. Therefore, a simple way for realizing breakthrough in the aspect of representing cooling power still exists. The existing market has no special measuring device for cooling power, and the measuring method used in a laboratory is to realize temperature control by using a controller under PID regulation, so that the power consumed by a heating plate is characterized as cooling power, the realization difficulty is high, the cost is high, and the temperature regulation is not easy to realize. Disclosure of Invention In order to solve the problems of complexity and higher difficulty of a radiation cooling power measuring device, the application discloses a radiation cooling power measuring device, which adopts the following technical scheme: The measuring device comprises a radiating fin, a heat conducting layer, a temperature difference resistance piece, a basal layer and a power meter, wherein the heat conducting layer is arranged on one side of the hot end of the temperature difference resistance piece, the radiating fin is arranged at the bottom of the heat conducting layer, the basal layer is arranged on one side of the cold end of the temperature difference resistance piece, and a radiation refrigeration cooling material layer to be measured is placed on the upper surface of the basal layer; The heat radiating fin, the heat conducting layer, the temperature difference resistor piece and the basal layer form a temperature difference generating piece together; the power meter is connected with the hot end and the cold end of the temperature difference resistor piece through wires to form a closed loop. The preferable scheme is as follows: The device also comprises a heat preservation box; the top of the heat preservation box is hollowed out and covered with a layer of light-transmitting film, a plurality of through holes are formed in the side wall of the heat preservation box, the temperature-reducing layer is arranged inside the heat preservation box, and the power meter is arranged outside the heat preservation box. The substrate layer is made of metal or glass. The heat preservation box is made of polystyrene. The heat conduction coefficient is low, and the influence of an external heat source can be effectively reduced. The transparent film is made of polyethylene. The material layer to be tested can exchange heat with the deep space through the atmospheric window by radiation. The power meter comprises a power meter, a wireless communication module, an upper computer and a control module, wherein the wireless communication module is used for transmitting data measured in the power meter to the upper computer, and the upper computer is used for data processing and outputting radiation refrigeration cooling power of a radiation refrigeration cooling material layer to be measured. The wireless communication module comprises a WIFI module, a Bluetooth module, an infrared module and an LTE cellular data communication module. In the measuring device of the radiation refrigeration cooling power, a thermoelectric generation sheet (TEG) is formed by a radiating fin, a heat conducting layer, a thermoelectric resistance piece and a basal layer together; During measurement, the radiation refrigeration cooling material layer to be measured is fixed on the basal layer by using heat conduction silica gel, s