Cooling performance of a bioinspired micro-crystal-bars coated composite fabric with solar reflectance

2021 ◽  
pp. 100814
Author(s):  
Yuxiang Wang ◽  
Dahua Shou ◽  
Songmin Shang ◽  
Ka-Lok Chiu ◽  
Shouxiang Jiang
Keyword(s):  
Cooling Performance ◽  
Solar Reflectance

scholarly journals A Multilayer Emitter Close to Ideal Solar Reflectance for Efficient Daytime Radiative Cooling

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1203 ◽  
Author(s):  
Yeqing Zhu ◽  
Dong Wang ◽  
Cheng Fang ◽  
Ping He ◽  
Yong-Hong Ye
Keyword(s):  
Air Temperature ◽  
Physical Vapor Deposition ◽  
Ambient Air ◽  
Film Structure ◽  
Radiative Cooling ◽  
Atmospheric Conditions ◽  
Cooling Performance ◽  
Average Temperature ◽  
Ambient Air Temperature ◽  
Solar Reflectance

A passive radiative cooling method has a significant influence on thermal management applications because it can cool without any energy input. This work both experimentally and theoretically demonstrates a multilayer thin film structure with high solar reflectance, which can be applied to passive daytime radiative cooling. The combination of physical vapor deposition and spin-coating prepared the samples, which were also characterized experimentally by spectrometers. On-site measured results show that the emitter can effectively achieve daytime radiative cooling, and the cooling performance can be further improved with the increase of the ambient air temperature. When the emitter is exposed to direct solar radiation (AM1.5) of about 880 W/m2 on a rooftop under dry air conditions, it can achieve an average temperature reduction of about 12.6 °C from the ambient air temperature with nonradiative heat transfer (11 a.m.–1 p.m.). Theoretical simulations reveal that the emitter can still have a certain cooling performance in the presence of significant nonradiative heat exchange and nonideal atmospheric conditions. The influence of ambient air temperature on the cooling performance of the emitter is also theoretically analyzed.

Cooling Performance Analysis of Heat Sink

2011 ◽  
Vol 1 (9) ◽  
pp. 65-67
Author(s):  
Pritesh S Patel ◽  
◽  
Prof. Dattatraya G Subhedar ◽  
Prof. Kamlesh V Chauhan
Keyword(s):  
Performance Analysis ◽  
Heat Sink ◽  
Cooling Performance

Investigation of the cooling performance and thermal comfort for 4-way cassette air conditioner with swinging motion of vanes

2021 ◽  
Vol 35 (4) ◽  
pp. 1757-1770
Author(s):  
Ho Yeon Choi ◽  
Jae Hyun Oh ◽  
Man Su Park ◽  
Sai Kee Oh ◽  
Yong Gap Park ◽  
...  
Keyword(s):  
Thermal Comfort ◽  
Air Conditioner ◽  
Cooling Performance

scholarly journals Study of Injection Method for Maximizing Oil-Cooling Performance of Electric Vehicle Motor with Hairpin Winding

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 747
Author(s):  
Taewook Ha ◽  
Dong Kyu Kim
Keyword(s):  
Electric Vehicle ◽  
Flow Rate ◽  
Film Formation ◽  
Formation Rate ◽  
Cooling Performance ◽  
Oil Film ◽  
Injection Method ◽  
Cooling Method ◽  
Oil Flow ◽  
Oil Injection

The oil injection method was studied to maximize the cooling performance of an electric vehicle motor with a hairpin winding. The cooling performance of the motor using the oil cooling method is proportional to the contact area of the oil and the coil. A numerical analysis was conducted to examine the effect of the spray nozzle type on the oil flow. The dripping nozzle forms the thickest oil film on the coil, making it the most effective for cooling of hairpin-type motors. Subsequently, an experimental study was conducted to optimize the nozzle diameter and number of nozzles. When the inlet diameter and number was 6.35 mm and 6, the oil film formation rate was 53%, yielding the most uniform oil film. Next, an experiment was performed to investigate the effects of the oil temperature and flow rate on the oil flow. The oil film formation rate was the highest (83%) when the oil temperature was 40 °C and the flow rate was 6 LPM.

Sign in / Sign up

Export Citation Format

Share Document