• CN：11-2187/TH
• ISSN：0577-6686

• 可再生能源与工程热物理 •

### 单螺杆膨胀机在有机朗肯循环系统中的性能研究

1. 北京工业大学环境与能源工程学院 北京 100124
• 出版日期:2015-08-20 发布日期:2015-08-20
• 基金资助:
国家重点基础研究发展计划(973计划，2011CB710704)和国家自然科学基金(51361135702)资助项目

### Performance Study on Single-screw Expander in Organic Rankine Cycle System

ZHANG Yeqiang, WU Yuting, XIA Guodong, MA Chongfang, JI Weining, LIU Shanwei, WANG Jingfu, GUO Hang

1. College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124
• Online:2015-08-20 Published:2015-08-20

Abstract: The selection of expanders for organic Rankine cycle (ORC)systems is very important, because it affects the performance of the system significantly. Single-screw expander is a new type of volume-type expanders, which is very suitable for medium/small scale ORC systems. In order to investigate the performance of single-screw expander in an ORC system, an experimental system is set up which is used high temperature gas as heat source and R123 as working fluid. By adjusting the torque and back pressure of single-screw expander and the vapor dryness of working fluid, the performance of single-screw expander has been obtained. The power output of single-screw expander is 5.46 kW, and the total efficiency and volume efficiency are 48.7% and 80%, respectively. The results shown that under the same heat resource, the expander ratio of single-screw expander increased with the risings of torque and dryness, but it decreased with the increase of back pressure; the volume efficiency decreased with increases of torque and dryness; and the total efficiency of single-screw of expander decreased with increases of back pressure and dryness, and with increase of torque, it increased at first and then decreased after the maximum is gotten.