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Radiation air conditioning system based on polymer aerogel

A technology of radiant air-conditioning and airgel, which is applied in air-conditioning systems, climate sustainability, space heating and ventilation, etc., and can solve problems such as cooling loss, cooling loss, and affecting the infrared emission performance of the emission layer

Inactive Publication Date: 2021-07-06
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the radiant air-conditioning systems that have been proposed so far, the air-conditioning low-temperature emission layer and the environment are mostly separated by an air layer or the emission layer is directly exposed to the environment. For example, in patent CN201710489249.7, there is inevitably an The convective heat transfer between the cold plates makes the cooling loss, so it is necessary to improve the heat insulation measures between the cold plate and the environment without affecting the radiation heat transfer
When the radiant air conditioner is used outdoors, it will inevitably be affected by sunlight. Sunlight can directly heat the low-temperature emission layer and cause cooling loss
In addition, since the temperature of the emission layer of radiant air conditioners is lower than the ambient temperature, condensation of water vapor on the surface of the emission layer is easy to occur in high-humidity areas. Affects the infrared emission properties of the emissive layer

Method used

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  • Radiation air conditioning system based on polymer aerogel
  • Radiation air conditioning system based on polymer aerogel
  • Radiation air conditioning system based on polymer aerogel

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The present embodiment relates to the preparation method of polymer airgel, comprises the following steps:

[0041] 1) Weigh 1g polyethylene powder, 0.5g dibutyl hydroxytoluene and 98.5g paraffin oil;

[0042] 2) The polyethylene powder, dibutylhydroxytoluene and paraffin oil weighed in step 1) are mixed in a jar at room temperature;

[0043] 3) Heat the mixed solution obtained in step 2) in a silicone oil bath at 150°C, and stir with a magnetic stirrer while heating, and the stirring speed is 300r / min;

[0044] 4) Place a square aluminum mold with a size of 10cm*15cm*2cm on a heating table to preheat to 110°C;

[0045] 5) Heat and stir the solution in step 3) for about 30 minutes, then stop stirring, and pour the solution into the preheated mold in step 4);

[0046] 6) quickly place the mold containing the solution in step 5) in the ice-water mixture, wait for about 5 minutes, phase separation occurs, and a jelly-like gel is obtained;

[0047] 7) Soak the jelly-like g...

Embodiment 2

[0058] The basic structure of the radiant air conditioner of the present invention is as follows: Figure 4 As shown, among them, 1 is the cooling layer, which is used to realize refrigeration and generate low temperature, 2 is the high infrared emission layer, which is used to absorb the infrared radiation energy from the heat source; 3 is the polymer airgel, which does not affect the infrared transmission Realize the insulation of the cold layer at the same time, and have the function of reflecting sunlight and avoiding water vapor condensation at the same time; 4 is a common insulation layer, which can use materials such as foam plastics to prevent the cooling from being lost to the environment from the back and sides.

[0059] The working principle of the polymer airgel in the radiant air conditioner of the present invention is as follows: Figure 5 As shown, among them, 5 is infrared heat radiation, which can pass through the polymer airgel 3, be absorbed by the high infr...

Embodiment 3

[0061] A method for building a radiant air-conditioning system, comprising the following steps:

[0062] 1) Take a semiconductor refrigeration chip;

[0063] 2) In step 1), the cold surface of the semiconductor refrigeration sheet is coated with a layer of PDMS;

[0064] 3) Lay a piece of polymer airgel on the surface of PDMS, and fix the polymer airgel with the cooling sheet coated with PDMS;

[0065] 4) A layer of foamed plastics used for ordinary heat preservation is wrapped around the composite layer made in step 3), thus a simple radiant air-conditioning device is combined;

[0066] 5) The radiant air conditioner can start to work after the semiconductor refrigerating sheet is powered on.

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Abstract

The invention belongs to the technical field of temperature regulation, and particularly relates to a radiation air conditioning system based on polymer aerogel. The radiation air conditioning system comprises a thermal insulation outer layer, a refrigeration layer, a high infrared emission layer and a polymer aerogel layer, all of which are arranged in sequence. The system depends on radiation heat exchange, an intermediate medium is not needed, and useless consumption of air conditioner cold in the intermediate medium can be reduced; the problem about temperature regulation in non-closed spaces and outdoor places can be solved, and the application range of an air conditioner is wider; the problem of useless dissipation of cold of an air conditioner cold plate to the surrounding environment and the problem of heating to a low-temperature layer by sunlight are solved in a simple and effective manner, and the energy-saving performance of the air conditioning system is improved; and condensation of water vapor on the surface of the low-temperature emission layer can be effectively avoided, and the practicability of the radiation air conditioner is improved.

Description

technical field [0001] The invention belongs to the technical field of temperature adjustment, and in particular relates to a radiation air-conditioning system based on polymer airgel. Background technique [0002] Air-conditioning technology is a technology that regulates the temperature of a certain space, environment or object, and is commonly used in building temperature regulation and human thermal comfort management. [0003] Radiation heat transfer is a heat transfer method in which objects with temperature differences exchange energy in the form of thermal radiation. Energy transmission relies on electromagnetic waves without an intermediate medium. For objects whose temperature is near the ambient temperature, most of the energy of their thermal radiation is concentrated in the infrared band. [0004] Radiation air conditioning is a temperature adjustment method that enables the cold source object and the heat source object to transfer heat between the cold and hea...

Claims

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Application Information

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IPC IPC(8): F24F5/00F25B23/00C08J9/28C08L23/06
CPCF24F5/0007F25B23/003C08J9/28C08J2323/06Y02P20/10
Inventor 刘抗刘辉东何荣杰王晨逸熊凌亨
Owner WUHAN UNIV
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