Experimental Investigation on Heat Transfer Characteristics of Liquid Nitrogen Spray Cooling for Large Area

Yu Gong, Jinhong Zhao, Wei Li, Qing Ai (), Jiaming Gong (), Yong Shuai () and Chuang Sun
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Yu Gong: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Jinhong Zhao: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Wei Li: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Qing Ai: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Jiaming Gong: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Yong Shuai: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Chuang Sun: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

Energies, 2022, vol. 16, issue 1, 1-18

Abstract: Spray cooling has demonstrated advantages in the thermal control of avionic devices. In this study, a spray cooling system is established using liquid nitrogen (LN2) as a working fluid to investigate the effect of heat transfer characteristics on a large heating surface. The temperature response measurement and experimental analysis of the heating surface of a large-area shell structure under the boundary conditions of different heat flux and temperature regions were carried out. The temperature response curves for the outer surface of the shell structure from the initial temperature to the set temperature were obtained under different heat flows and temperature zones. The results show that the thermal response time of the surface spray phase cooling is less than 2 s, the stability time for the cooling temperature of the covering layer is longer than 60 s, and the cooling state can be maintained for 30 min under different working conditions. This study can provide a technical reference for the application of spray systems in the field of aircraft cooling.

Keywords: temperature control; spray cooling; large area; liquid nitrogen (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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