斯特林制冷循环膨胀腔制冷能力研究  

Study on the cooling capacity of expansion chamber in Stirling refrigeration cycle

作　　者：吴腾马 周巧根[2] 汤启升[2] 樊凯 WU Tengma;ZHOU Qiaogen;TANG Qisheng;FAN Kai(Shanghai Institute of Advanced Research,Chinese Academy of Sciences,Shanghai 201204,China;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China)

机构地区：[1]中国科学院上海高等研究院,上海201204 [2]中国科学院上海应用物理研究所,上海201800

出　　处：《流体机械》2022年第5期99-104,共6页Fluid Machinery

基　　金：上海市科技重大专项(2017SHZDZX02);上海应用物理研究所科研项目(1105000503)。

摘　　要：针对斯特林制冷循环内膨胀腔与压缩腔温度差异较大导致采用闭口系统分析与实际情况偏差较大的问题,本文将产生实际制冷能力的膨胀腔视为开口系统,并对其进行制冷能力分析。结果表明,工质的制冷能力可用气缸内工质体积对压力的积分表示,膨胀腔的实际制冷能力可用工质的制冷能力减去工质进出膨胀腔的焓差表示;影响工质体积对压力积分的主要因素为活塞面积比n、膨胀腔相位领先角φ与膨胀腔温度T_(e);当压缩腔温度为320 K、膨胀腔温度为80 K时,活塞面积比在4左右时会获得最优的制冷效率。所得结果可为斯特林制冷循环的设计与优化提供依据。Considering the large deviation between the analysis when using closed system and the actual situation due to large temperature difference between the expansion chamber and compression chamber of Stirling cycle,the expansion chamber producing actual cooling capacity was considered as the opening system and its cooling capacity was analyzed separately.The results show that the cooling capacity of the working medium can be expressed by integration of volume with pressure.The actual cooling capacity of the expansion chamber can be expressed by cooling capacity of the working medium minus the difference of enthalpy entering and leaving the expansion chamber.Main factors affecting integration of volume of the working medium with pressure are piston area ratio n,phase lead angle of expansion chamber,and expansion chamber temperature T_(e).The system can achieve best refrigeration efficiency when the compression chamber temperature is 320 K,expansion chamber temperature is 80 K,and the piston area ratio is about 4.The results can provide a basis for the design and optimization of Stirling refrigeration cycle.

关 键 词：斯特林制冷循环 膨胀腔 开口系统 制冷能力 

分 类 号：TH12[机械工程—机械设计及理论]