Performance evaluation of a micro turbo-expander for application in low-temperature solar electricity generation  

作　　者：Gang PEI Yun-zhu LI Jing LI Jie JI 

机构地区：[1]Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230026, China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2011年第3期207-213,共7页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project (Nos.50974150 and 50708105) supported by the National Natural Science Foundation of China

摘　　要：A micro turbo-expander capable of high working speed was specially manufactured for use in an organic Rankine cycle (ORC).A series of tests were executed to examine the performance of the machine.In the experiment,the machine was tested under different inlet pressure conditions (0.2-0.5 MPa).Data such as the compressed air pressure,temperatures of the inlet and the outlet,rotational speed,and electric power generation were analyzed to discover underlying relationships.During the test,the rotational speed of the machine reached as high as 54 000 r/min,the peak value of the temperature drop between the inlet and the outlet reached 42 ℃,the maximum electric power generated by the motor-generator attached to the machine reached 630 W,and the efficiency of the machine reached 0.43.A micro turbo-expander capable of high working speed was specially manufactured for use in an organic Rankine cycle （ORC）. A series of tests were executed to examine the performance of the machine. In the experiment, the machine was tested under different inlet pressure conditions （0.2-0.5 MPa）. Data such as the compressed air pressure, temperatures of the inlet and the outlet, rotational speed, and electric power generation were analyzed to discover underlying relationships. During the test, the rotational speed of the machine reached as high as 54 000 r/min, the peak value of the temperature drop between the inlet and the outlet reached 42 ℃, the maximum electric power generated by the motor-generator attached to the machine reached 630 W, and the efficiency of the machine reached 0.43.

关 键 词：Turbo-expander SOLAR LOW-TEMPERATURE Performance evaluation 

分 类 号：O513[理学—低温物理] TM615[理学—物理]