机械制冷机污染控制.pdfVIP

机械制冷机污染控制 杨宝玉府华吴亦农 (中国科学院上海技术物理研究所，上海200083) 摘要 污染控制是提高空间机械制冷机长寿命运行可靠性的关键因素。为了阐明污染对制冷机影响的机 理，对制冷机内部污染源进行分类，并采用蒙特卡罗方法对污染气体在制冷机内复杂的传质扩散过程进行 建模计算，然后分析了污染气体在蓄冷器的凝结对制冷机性能的影响。根据污染机理的分析结合实际经验 提出了在制冷机选材、装配、充气过程中一些必要的污染控制手段及其改进措施。进而对机械制冷机污染 控制技术的系统化、标准化进行了展望。 关键词机械制冷机寿命污染放气传质蓄冷器控制 CONTAMINATIONCONTROL0FM[ECHANICAL Hua Fu Wu Baoyu Yang Yinong Institute of (ShanghaiofTechnologicalPhysics，ChineseAcademySciences，Shanghai200083) ofmechanical AbstractContaminationcontroliSa cmcialfactorto the andduration improvereliability in orderto thecontaminationmechanism．anumberofsourcesofinternal clarify cryocoolerspaceapplication．In were been tO masstransfer contaminationjdentified．theMonteCarlomethodhas usedsimulatethe complicated ofcontaminationinthecooler．thenthe traceabletothe process performancedegradationdirectly accumulationon was onthetheoreticalcombinedwith regeneratoranalyzed．Subsequently，basedstudy practical in be control the and can improved processessuggested． experiences，some proceduresdesign，assemblyfilling Furthermore。theandstandardizationof contaminationcontrolcanbe systematism cryocooler expected． LifeContamination Masstransfer