Ground experimental investigations into an ejected spray cooling system for space closed-loop application

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• 作者：Hongsheng Zhang^a ; ^{Hongsheng.Zhang@buaa.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Yunze Li^a ; ^{buaalyz@163.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Shengnan Wang^b ; ^{qfwangshengnan@126.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Yang Liu^a ; Mingliang Zhong^a
• 关键词：Ejected spray cooling system ; Evaluation models ; Ground experiment ; Heat transfer performance ; High heat flux ; Space closed-loop
• 刊名：Chinese Journal of Aeronautics
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：29
• 期：3
• 页码：630-638
• 全文大小：1682 K

文摘

Spray cooling has proved its superior heat transfer performance in removing high heat flux for ground applications. However, the dissipation of vapor–liquid mixture from the heat surface and the closed-loop circulation of the coolant are two challenges in reduced or zero gravity space environments. In this paper, an ejected spray cooling system for space closed-loop application was proposed and the negative pressure in the ejected condenser chamber was applied to sucking the two-phase mixture from the spray chamber. Its ground experimental setup was built and experimental investigations on the smooth circle heat surface with a diameter of 5 mm were conducted with distilled water as the coolant spraying from a nozzle of 0.51 mm orifice diameter at the inlet temperatures of 69.2 °C and 78.2 °C under the conditions of heat flux ranging from 69.76 W/cm² to 311.45 W/cm², volume flow through the spray nozzle varying from 11.22 L/h to 15.76 L/h. Work performance of the spray nozzle and heat transfer performance of the spray cooling system were analyzed; results show that this ejected spray cooling system has a good heat transfer performance and provides valid foundation for space closed-loop application in the near future.