Influence of inlet pressure and rotational speed on the performance of high pressure single screw expander prototype

被引：21
作者：
Li, Guoqiang [1 ,2 ]
Lei, Biao [1 ,2 ]
Wu, Yuting [1 ,2 ]
Zhi, Ruiping [1 ,2 ]
Zhao, Yingkun [1 ,2 ]
Guo, Zhiyu [1 ,2 ]
Liu, Guangyu [1 ,2 ]
Ma, Chongfang [1 ,2 ]
机构：
[1] Beijing Univ Technol, Coll Environm & Energy Engn, MOE Key Lab Enhanced Heat Transfer & Energy Conse, Beijing 100124, Peoples R China
[2] Beijing Univ Technol, Coll Environm & Energy Engn, Beijing Municipal, Beijing Key Lab Heat Transfer & Energy Convers, Beijing 100124, Peoples R China
来源：
ENERGY | 2018年 / 147卷
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
High pressure single screw expander; Inlet pressure; High pressure energy recovery; Shaft efficiency; ORGANIC RANKINE-CYCLE; WASTE HEAT-RECOVERY; LOW-GRADE HEAT; SCROLL EXPANDER; COMPRESSED-AIR; WORKING FLUID; SYSTEMS; TURBINE; ENERGY;
D O I：
10.1016/j.energy.2018.01.034
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
To recover high pressure energy in a letdown station, a high pressure single screw expander (HPSSE) with 117 mm diameter is developed in our laboratory recently. This study presents the results of an experimental survey on the performance of HPSSE under varied inlet pressure and rotational speed. The inlet pressure of HPSSE ranges from 1.0 MPa to 5.0 MPa and the rotational speed is from 1500 rpm to 3000 rpm. The experimental results show that when the inlet pressure is 5.0 MPa, the maximum power output, volumetric efficiency, isentropic efficiency and shaft efficiency of HPSSE are 56.55 kW, 80.57%, 62.55% and 50.96%, respectively. The volumetric efficiency is immensely affected by inlet pressure under fairly slow rotational speed and a slight change in volumetric efficiency is observed under considerably high rotational speed. A high rotational speed is an effective method to reduce leakage in large pressure difference working conditions. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：279 / 285
页数：7
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