自然科学版 英文版
自然科学版 英文版
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中南大学学报(英文版)

Journal of Central South University

Vol. 20    No. 2    February 2013

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Performance analysis and improvement of geothermal binary cycle power plant in oilfield
LI Tai-lu(李太禄)1,2, ZHU Jia-ling(朱家玲) 1,2, ZHANG Wei(张伟) 1,2

1. Key Laboratory of Efficient Utilization of Low and Medium Grade Energy of Ministry of Education
(Tianjin University), Tianjin 300072, China;
2. Tianjin Geothermal Research and Training Center, School of Mechanical Engineering,
Tianjin University, Tianjin 300072, China

Abstract:In order to improve the efficiency of a geothermal power plant, oil wells in the high water cut stage were used as geothermal wells, thereby improving the recovery ratio and economic benefit. A new function that reflects both the technical and economic performances was put forward and used as the objective function. An organic Rankine cycle (ORC) was analyzed through the energetic and exergetic analyses, and the reasons for low efficiency were pinpointed. Results indicate that geothermal water directly transferring heat to the working fluid reduces energy dissipation and increases cycle efficiencies. The net power output with an internal heat exchanger (IHE) is averagely 5.3% higher than that without an IHE. R601a and R601 can be used to replace R123 for geothermal water below 110 °C. Moreover, the modified ORC dramatically outperforms the actual one.

 

Key words: geothermal power generation; organic Rankine cycle; energetic and exergetic analyses; oilfield; internal heat exchanger

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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