不同节距肋片管节流制冷器启动时间的研究  

EXPERIMENTAL RESEARCH ON FINNED TUBE HEAT EXCHANGER WITH DIFFERENT PITCH FOR A JOULE-THOMSON COOLER START-UP TIME

作　　者：李家鹏[1] 陈晓屏[1] 张绍裕 夏丽昆 刘春[1] 赵建锋 肖日仕 LI Jia-peng;CHEN Xiao-ping;ZHANG Shao-yu;XIA Li-kun;Liu Chun;ZHAO Jian-feng;XIAO Ri-shi(Kunming Institute of Physics,Kunming 650223,China;Military Commissary DepartmentGarrisoned in Kunming of Chongqing Commissary Bureau,Kunming 650223,China)

机构地区：[1]昆明物理研究所,昆明650223 [2]重庆军代局驻昆明地区军代室,昆明650223

出　　处：《真空与低温》2018年第3期167-171,共5页Vacuum and Cryogenics

摘　　要：节流制冷器的启动属于非稳态过程,目前的仿真计算仍然存在较大的误差。通过建立不同节距肋片管节流制冷器的实验模型,验证对节流制冷器启动时间的影响。实验结果表明,肋片管换热器翅片节距的变化,对节流制冷器的启动时间影响较大,该影响不是线性关系存在拐点。在设计模型时,肋片管的最佳节距为0.2 mm,该研究对J-T制冷器的设计有指导意义。The starting-up process of a J-T cooler is unsteady process. There is still a large error in the simulation of aJ-T cooler’ s start-up process until now. Establishing the experimental model of different pitch finned tube heat exchangerto verify the effect on a J-T cooler start-up time. The experimental results show that the change of a heat exchanger finpitch has impact on a J-T cooler start-up time,and the impact is not a linear relationship,there is an inflection point. In themodel of this paper,the optimum pitch of fin tubes is 0.2 mm. The study is useful for the design of the J-T cooler.

关 键 词：节流制冷器 肋片管换热器 微型 启动时间 

分 类 号：TB65[一般工业技术—制冷工程]