重力辅助平板型环路热管实验研究  

Experimental Study of a Gravity-assisted Plate Type of Loop Heat Pipe

作　　者：盖东兴[1] 刘志春[1] 刘伟[1] 杨金国[1] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《热能动力工程》2010年第2期196-201,共6页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目(50876035;50909026);中国博士点学科新进教师博士点基金资助项目(20070487093)

摘　　要：研制了一套以不锈钢丝网为毛细芯的平板式蒸发器、风冷式冷凝器,以甲醇为工作工质的环路热管,并着重研究了其在不同热负荷条件下启动特性以及变工况条件下运行特征。实验结果表明,平板式LHP可以在1～10W/cm2热流密度范围内顺利启动,并有良好的适应变热负荷能力,在改变工况的时候系统一般能在3min内重新达到新平衡状态。系统在18～48W热负荷条件下出现波幅和周期不等的温度波动现象。实验系统的热阻在0.29～3.2℃/W之间,热阻与热负荷、系统倾角以及工质充灌量有关,并重点研究了倾角以及充灌量对系统启动及其变工况运行的影响。Developed was a set of plate type evaporator and air cooled condenser with stainless steel wires serving as capillary cores, and loop heat pipes with methanol serving as the working medium. The emphasis was put on the study of their startup characteristics under different heat load conditions and their operating characteristics under off-design operating conditions. The test results show that the plate type of loop heat pipes can successfully start up at a heat flux density ranging from 1 W/cm2 to 10 W/cm2 and have a good capacity to accommodate themselves to a change in the heat load. During a transition from one operating condition to another, the system can usually come to a new balance state within 3 minutes. Under the condition of the heat load of 18 W to 48 W, a phenomenon of temperature fluctuations with unequal wave amplitudes and cycles will emerge in the system. The heat resistance of the experimental system is between 0.29 and 3.2 ℃/W. The heat resistance is related to heat load, system inclination angle and filling amount of the working medium. Special emphasis of the present study was put on an analysis of the influence of the above-mentioned inclination angle and filling amount on the startup of the system and its off-design operations.

关 键 词：环路热管 平板型蒸发器 热控 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]