化工学报2016，Vol.5Issue(5)：1778-1783,6.DOI:10.11949/j.issn.0438-1157.20151669
双面蒸发器环路热管的瞬态特性
Transient properties of bifacial evaporator loop heat pipe
摘要
Abstract
Loop heat pipe (LHP) is an efficient two-phase heat transfer device, mainly applied to spacecrafts and terrestrial electronics with high heat density. The existing flat loop heat pipes (FLHPs) are only used a surface to dissipate heat. Thus, the adverse back-conduction makes it difficult for FLHPs to startup at low heat loads, and also, the another surface of the flat evaporator possesses the potential for heat rejection. Aiming at the disadvantages above, a methanol-copper loop heat pipe with a bifacial evaporator was developed in this paper. Under the conditions of assisted-gravity angle at 10° and heat sink temperature at 0℃, startup performance and variable heat load operation were investigated with one surface heated and two surfaces heated simultaneously. The experimental results indicated that this loop could start up successfully and operate normally when one surface or two surfaces worked, but startup process with two surfaces heated showed faster and more stable. With heat source simulator wall temperature below (90±2)℃, the evaporator with one surface heated could transfer the maximum heat load of 210 W, corresponding to a heat flux of 21.8 W·cm?2, while 240 W at the evaporator with two surfaces heated. For operation with alternative heat load, the LHP could quickly shift from one surface to another surface, and operation failure was not observed.关键词
平板式环路热管/双面蒸发器/温度波动/两相传热/稳定状态Key words
flat LHP/bifacial evaporator/temperature instability/two-phase heat transfer/steady state分类
能源科技引用本文复制引用
何松,刘志春,汪冬冬,刘伟,杨金国,张晓屿..双面蒸发器环路热管的瞬态特性[J].化工学报,2016,5(5):1778-1783,6.基金项目
国家自然科学基金项目(50906026, 51276071).supported by the National Natural Science Foundation of China (50906026, 51276071). （50906026, 51276071）
