液氮温区JT节流制冷机多元低温混合物工质热力循环优化设计  

OPTIMIZATION DESIGN FOR MULTICOMPONENT CRYOGENIC MIXTURE USED IN JOULE THOMSON CRYOCOOLER OPERAT ING IN LIQUID NITROGEN TEMPERATURE RANGE

作　　者：公茂琼[1] 罗二仓[1] 周远[1] 

机构地区：[1]中国科学院低温技术实验中心,北京100080

出　　处：《低温工程》1999年第4期13-18,共6页Cryogenics

基　　金：国家自然科学基金

摘　　要：报道了针对液氮温区混合物工质 Ｊ Ｔ节流制冷机的热力循环优化计算。作者以制冷循环的卡诺系数为目标函数， 考虑了压缩机的容积效率及换热器的传热温差损失等实际情况， 采用复合形优化算法， 在给定热力条件下来优化混合物最佳配比和循环最佳运行压力参数。计算结果对实际混合物制冷循环设计有一定指导意义。The optimization calculation is reported in this paper for multicomponent cryogenic mixture used in Joule Thomson cryocooler operating in liquid nitrogen temperature range.An optimization calculation program is developed.In this program,we use the thermodynamic perfect degree(also called Carnot Fraction) of J T cryocooler as the objective function to be maximized.The coefficient of the compressor and the temperature difference in heat exchanger are considered in this work.The Complex Optimization Algorithm(COA) is introduced.The calcuation result can be helpful in the experimental investigation of the mixed gas refrigerant J T refrigerator.

关 键 词：混合物工质 J-T节流制冷机 优化设计 液氮 

分 类 号：TB651[一般工业技术—制冷工程] TB66