||Cooling is a device required by many equipments and one of the main factors that consume a lot of electricity. Due to the increasing greenhouse effect, the development of green energy is also an urgent matter. The structure made in this paper can make use of the atmospheric window, which in turn causes the effect of passive cooling.|
We use passive cooling, which means that it does not require extra power, and uses its own characteristics for the heat radiation band to cool the object, because the atmospheric window is in a band with a very high transmittance of 8~14 μm, thermal energy will not be The energy absorbed by the atmosphere is transmitted to outer space, so we conveniently use the atmospheric window to implement our radiation cooling.
We coated the ITO/PVAc film on the copper substrate and attached it to the cold surface of the thermoelectric wafer, and used the characteristics of radiation cooling to generate electricity.When the ambient temperature is 22 degrees Celsius, 1.12 wt% ITO/PVAc film is covered on the TEG wafer. When the TEG wafer is given a constant thermal energy of 80 degrees Celsius, the current that can be generated is 8.47 mA, and the simulated net radiant cooling power is 469.28 W/m2. 10.12 wt% ITO/PVAc film given TEG wafer 80 degrees Celsius constant thermal energy can produce 11.19 mA current, simulated net radiation cooling power is 937.21 W/m2.
The ITO/PVAc film weight percentage concentration was increased from 1.12 wt% to 10.12 wt%. The simulated net radiant cooling power was increased by 467.93 W/m2 under the condition of giving a constant thermal energy of 80 degrees Celsius, and the actual measured current increased by 2.72 mA .1.12 wt% ITO/PVAc film simulates a net radiation cooling power of 83.04 W/m2 when the ambient temperature is the same as the structure temperature,10.12 wt% ITO/PVAc film simulates a net radiation cooling power of 115.84 W/m2when the ambient temperature is the same as the structure temperature, ITO/PVAc film increased from 1.12 wt% to 10.12 wt% at room temperature with a net weight cooling power increase of 32.8 W/m2.Increasing the concentration of ITO particles can increase the net radiant cooling power, so that the efficiency of heat dissipation is improved, and the application in power generation also increases the amount of power generated.
||1. Vectorized by User:Mysid in Inkscape, original NASA image from File:Atmospheric electromagnetic transmittance or opacity.jpg.|
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