【作者】 张美兰； 马一太； 李敏霞；

【Author】 Zhang Meilan Ma Yitai Li Minxia (Thermal energy research institute of Tianjin university,Tianjin 300072)

【机构】 天津大学热能研究所；

【摘要】 本文分析了CO2双缸滚动活塞膨胀机中间通道对其效率及膨胀比的影响。并对CO2双缸滚动活塞膨胀机的中间通道进行了改进,即同时减小中间通道的长度和直径。本文还对改进后的膨胀机做了相关实验,实验中膨胀机的入口最优工况在26℃,6.5MPa左右,回收功率最高达到200W,效率最高达到42.3%。在各种实验工况下,原膨胀机测得的膨胀比已经达到了2.2左右,较之设计膨胀比2.5,已经非常接近。但是,原膨胀机仍有改进的空间。更多还原

【Abstract】 The influence on efficiency and expansion ratio of the intermediate channel of CO2 two-cylinder rolling piston expander is researched in this paper.The channel is improved like this:decreasing its diameter and length at the same time.The experiment of the improved expander is carried out in this paper.26℃,6.5MPa is the optimum work condition of the test.The recover power of the expander is up to 200W with the efficiency is 42.3%.The expander ratio has already gone to 2.2,compared to the theoretical ratio 2.5.However,there is still the room for improvement of the expander.更多还原