CO2两相回路启动过程阶段蒸发和干烧现象分析  

ANALYSIS ON SUBSEQUENT NUCLEAR BOILING AND DRY-OUT DURING THE START-UP OF A TWO-PHASE CO_2 MECHANICALLY PUMPED THERMAL CONTROL SYSTEM

作　　者：孙西辉[1,2] 黄臻成[1,2] 陈粤[2,3] 肖文佳[1,2] 何振辉[1,2] J Van Es A Pauw 

机构地区：[1]中山大学空间技术中心,广东珠海510982 [2]中山大学物弹科学与工程技术学院,广东广州510275 [3]中山大学化学与化学工程学院,广东广州510275 [4]National Aerospace Laboratory, the Netherland

出　　处：《工程热物理学报》2009年第11期1889-1891,共3页Journal of Engineering Thermophysics

基　　金：广东省人民政府科技专项、科技部国际科技合作重点项目计划资助(No.2003DF000050);973计划前沿研究专项资助(No.2006CB708613);广东省自然科学基金资助项目(No.05003274)

摘　　要：采用并联蒸发器作为传热元件,并联冷凝器作为散热部件,建立了包括热量收集、传递与排散的机械泵驱动两相回路集成试验系统,并对该系统的热启动进行实验研究。实验结果表明:(1)在冷工况、低热流密度的情况下,采用长程毛细管结构的蒸发器对分布式小热源进行集热时,会出现阶段性形核沸腾蒸发,并且上游过热液体形核沸腾后会导致下游出现干烧现象。(2)对于该系统,并联蒸发器相同热量同时启动是相对较好的启动方式。A mechanically pumped CO2 two-phase thermal control loop （MPTCL）, to effectively collect waste heat through dual evaporators and release heat through dual condensers with longer transport distance, is investigated on its start-up characteristic. These experiments indicated that （1） when using long capillary tubes as an evaporator to collect distributed heat resource with low heat flux at low operational temperature, the MPTCL shows that superheating followed by subsequent nuclear boiling, and temporal dry-out found somewhere in the downstream after nuclear boiling are accomplished in the upstream, and （2） comparing three different start up characteristic, balance heat load is relative better way for the MPTCL＇ start-up.

关 键 词：机械泵驱动两相回路热控系统 阶段性形核沸腾 干烧 

分 类 号：TK124[动力工程及工程热物理—工程热物理]