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Experimental study on dynamic power generation of three ORC-based cycle configurations under different heat source/sink conditions

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  • Li, Tailu
  • Qiao, Yuwen
  • Wang, Zeyu
  • Zhang, Yao
  • Gao, Xiang
  • Yuan, Ye

Abstract

Organic Rankine cycle (ORC) is used for geothermal power generation, and other two derived cycle configurations, parallel double-stage organic Rankine cycle (PDORC) and organic Rankine flash cycle (ORFC), have been proposed to improve the geothermal power generation performance. However, no experimental comparison have been done before. An experimental device that can switch between three cycles was designed and constructed to compare the power generation performance of three cycles. The operational performance of the three cycles at different heat source and heat sink temperatures are analyzed in this paper. The results show that under the heat source temperature of 90 °C and heat sink temperature of 15 °C, the output power of ORFC is 876.59 W, which is higher than that of the PDORC and ORFC. Moreover, the exergetic efficiency is greater than other two cycles due to the smallest irreversible loss of ORFC. The exergetic efficiencies of the ORC, PDORC and ORFC are 31.87 %, 31.32 % and 34.79 %, respectively. The increase of heat sink temperature is beneficial for the isentropic efficiency of the expander, but not conducive to power generation performance and energy utilization. PDORC and ORFC promote the effective utilization of heat source, outputting more power but with a lower efficiency.

Suggested Citation

  • Li, Tailu & Qiao, Yuwen & Wang, Zeyu & Zhang, Yao & Gao, Xiang & Yuan, Ye, 2024. "Experimental study on dynamic power generation of three ORC-based cycle configurations under different heat source/sink conditions," Renewable Energy, Elsevier, vol. 227(C).
    • Handle: RePEc:eee:renene:v:227:y:2024:i:c:s096014812400613x
    DOI: 10.1016/j.renene.2024.120548
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    References listed on IDEAS

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