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Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2011, Vol. 12 Issue (3): 207-213    DOI: 10.1631/jzus.A1000105
Energy Engineering     
Performance evaluation of a micro turbo-expander for application in low-temperature solar electricity generation
Gang Pei, Yun-zhu Li, Jing Li, Jie Ji
Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230026, China
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Abstract  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 °C, 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.

Key wordsTurbo-expander      Solar      Low-temperature      Performance evaluation     
Received: 17 March 2010      Published: 09 March 2011
CLC:  TK11+4  
Cite this article:

Gang Pei, Yun-zhu Li, Jing Li, Jie Ji. Performance evaluation of a micro turbo-expander for application in low-temperature solar electricity generation. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2011, 12(3): 207-213.

URL:

http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A1000105     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2011/V12/I3/207

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