TY - JOUR
T1 - Comparative study of double-sided spray cooling system under atmospheric and sub-atmospheric ambient pressures
AU - Li, Xiang
AU - Ji, Bowen
AU - Chen, Jiajun
AU - Yu, Ruixing
AU - Liu, Xiufang
AU - Feng, Huicheng
N1 - Publisher Copyright:
© 2024 Elsevier Ltd
PY - 2024/3
Y1 - 2024/3
N2 - Spray cooling is a highly efficient cooling technique that is widely used on the ground, but is more challenging with regards to the thermal management of airborne microelectronics due to the sub-atmospheric ambient pressure. In this study, we conducted experimental analyses on a double-sided spray cooling system designed to cool both sides of a copper block under sub-atmospheric and atmospheric pressure, with variations in heat fluxes and spray flow rates. The results show that under sub-atmospheric ambient pressure, the cooling rate is higher, cooling surface temperature at steady state is lower, and the heat transfer coefficient is higher. The max heat transfer coefficients are achieved at intermediate flow rates. Taking into account of both heat transfer and power consumption, the coefficient of performance (COP) and power efficiency coefficient (PEC) exhibit a gradual decrease with increasing flow rates. In all the examined operating conditions, the spray system achieves max COP and PEC when the flow rate is low. Under sub-atmospheric pressure, the spray cooling performance shows an improvement of over 40% compared to that under atmospheric pressure.
AB - Spray cooling is a highly efficient cooling technique that is widely used on the ground, but is more challenging with regards to the thermal management of airborne microelectronics due to the sub-atmospheric ambient pressure. In this study, we conducted experimental analyses on a double-sided spray cooling system designed to cool both sides of a copper block under sub-atmospheric and atmospheric pressure, with variations in heat fluxes and spray flow rates. The results show that under sub-atmospheric ambient pressure, the cooling rate is higher, cooling surface temperature at steady state is lower, and the heat transfer coefficient is higher. The max heat transfer coefficients are achieved at intermediate flow rates. Taking into account of both heat transfer and power consumption, the coefficient of performance (COP) and power efficiency coefficient (PEC) exhibit a gradual decrease with increasing flow rates. In all the examined operating conditions, the spray system achieves max COP and PEC when the flow rate is low. Under sub-atmospheric pressure, the spray cooling performance shows an improvement of over 40% compared to that under atmospheric pressure.
KW - Atmospheric ambient pressure
KW - Double-sided spray cooling
KW - Heat transfer characteristics
KW - Sub-atmospheric ambient pressure
KW - Thermal performance enhancement
UR - http://www.scopus.com/inward/record.url?scp=85185481668&partnerID=8YFLogxK
U2 - 10.1016/j.tsep.2024.102443
DO - 10.1016/j.tsep.2024.102443
M3 - 文章
AN - SCOPUS:85185481668
SN - 2451-9049
VL - 49
JO - Thermal Science and Engineering Progress
JF - Thermal Science and Engineering Progress
M1 - 102443
ER -