Experimental study of the external load characteristics on a micro-scale organic Rankine cycle system

Yifan Zhang, Yu-Chun Tsai, Xiao Ren, Zhaodong Tuo, Wei Wang, Liang Gong and Tzu-Chen Hung

Energy, 2024, vol. 306, issue C

Abstract: The expansion device is considered the crucial equipment in Organic Rankine cycle (ORC). Due to the structure limitation, the scroll expander would be critical affected by the external load characteristics. In this work, to fit the development trend of small-scale ORC and fill the research blank of load resistance, the ORC system with rated power of 300 We was experimentally studied, the dynamic operation characteristics, the direct and indirect influence on each device, and the overall system performance with rated load of 175 We, 200 We and 225 We were evaluated. By adjusting the frequency of the pump, the system dynamic operation characteristics are developed, and the behaviors of the devices are analyzed. According to the system analyses, despite the system with a rated load of 225 We could reach the highest output of 707 Wnet, the system with the lower rated load has the favorable performance, caused by the superior expander and generator behaviors with lower Ampere force. The overall system performance shows that the thermal efficiencies exhibits an increase trend of about 6.67 %, 7.01 %, and 7.27 % sequentially for the system with rated load of 225 We, 200 We, and 175 We.

Keywords: Organic Rankine cycle; Load resistance; Experiment study; Operation characteristic (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:306:y:2024:i:c:s0360544224022278

DOI: 10.1016/j.energy.2024.132453

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