低温余热发电系统中涡轮膨胀机的优化研究  

Optimization Study of Turbo-expander in Power Generation System Recovering Low-temperature Waste Heat

作　　者：姜亮[1] 朱亚东[1] 徐建[1] 于立军[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《节能技术》2012年第5期400-404,共5页Energy Conservation Technology

摘　　要：以R152a为循环工质,对低温余热发电系统中径流涡轮式膨胀机进行了研究;采用EES(Engineering Equation Solver)软件编程对涡轮膨胀机进行了热力设计,其轮周效率、内效率分别可达90.19%和88.84%,输出功率为50 kW;对所设计的膨胀机进行性能分析发现:随着膨胀机入口工质温度的升高,其内效率稍有下降,而输出功率大幅增加;对应膨胀机大功率条件下的是较高的比转速Ns和较小的比直径Ds,符合未来高性能涡轮式膨胀机"大功率,高转速,小尺寸"的发展趋势。Research on the radial-flow turbine expander of low-temperature waste heat power generation using R152a as working fluid was conducted.Software EES（Engineering Equation Solver）was used to make thermodynamic design for turbine expander,of which the wheel efficiency reached 90.19% while the internal efficiency and output power reached 88.84%,50kW individually.By analysis,the internal efficiency decreased slightly while the output power increased substantially with the working fluid temperature rising at the expander inlet.Corresponding to the high expander power output condition,the specific speed Ns is big,while the diameter ratio Ds is small.Results of the analysis in this paper are consistent with the development of high-performance radial-flow turbine expander in future,which has higher power,faster speed and smaller size.

关 键 词：余热发电 有机朗肯循环 膨胀机 优化设计 软件开发 

分 类 号：TK11[动力工程及工程热物理—热能工程]