TESTING AND ANALYZING ON P-V DIAGRAM OF CO2 ROLLING PISTON EXPANDER

摘要：

Developing high efficient expander replacing throttle valve is one of the effective methods of improving performance of CO2 trans-critical refrigeration cycle. Testing on P-T and P-V diagram of CO2 rolling piston expander is discussed. The results show that expansion work in P-V diagram agree with practical recovery power. It is also shown that three different expansion processes can be occurred in expander. Owing to the theoretical expansion Vr in expander is constant after manufacturing, the expander will normal expand if the expansion ratio in practical working conditions equals to Vr; while the expansion ratio is larger than Vr, over-expansion will be produced; under-expansion may be generated as the expansion ratio is lower than Vr. Therefore, some measures that overcoming over-expansion and under-expansion to match the practical work condition of expander are discussed.

作者: Xianyang ZENG Yitai MA Shengchun LIU Hongli WANG

作者单位: Thermal Energy Research Institute, Tianjin University, Tianjin, 300072, China

会议类型: 国际会议

会议名称: The 22nd International Congress of Refrigeration(第22届国际制冷大会)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-21（万方平台首次上网日期，不代表论文的发表时间）