Evaluation of working fluids for geothermal power generation from abandoned oil wells

被引：101

作者：

Cheng, Wen-Long ^{[1
]}

Li, Tong-Tong ^{[1
]}

Nian, Yong-Le ^{[1
]}

Xie, Kun ^{[1
,2
]}

机构：

[1] Univ Sci & Technol China, Dept Thermal Sci & Energy Engn, Hefei 230027, Anhui, Peoples R China

[2] Anhui Elect Power Design Inst, Hefei 230601, Anhui, Peoples R China

来源：

APPLIED ENERGY | 2014年 / 118卷

基金：

中国国家自然科学基金;

关键词：

Geothermal power generation; Abandoned oil wells; Evaluation of working fluids; ORGANIC RANKINE-CYCLE; ENERGY;

D O I：

10.1016/j.apenergy.2013.12.039

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Geothermal power generation from abandoned oil wells is a new way to utilize geothermal energy. The organic Rankine cycle is used for exploiting geothermal energy from abandoned oil wells efficiently. The investigation on influences of working fluids on the power generation efficiency is significant. An analysis model for geothermal power generation based on the transient formation heat conduction of abandoned oil wells is presented in this paper. For abandoned oil wells with different kinds of well depths and geothermal gradients, the power generation performances using various organic fluids are analyzed. Direct power generation system (DPGS) is compared with flashing power generation system (FPGS). The results show that the geothermal energy from the abandoned oil wells with well depth less than 3000 m is worthless to be exploited due to low power generation efficiency. For the abandoned oil wells with well depths larger than 3000 m and geothermal gradients higher than 0.04 K/m, DPGS efficiency of supercritical working fluids leaving the recovery well is higher than FPGS efficiency of subcooled working fluids. R134a and R245fa are more suitable than R600a, R600, propylene, 12290 and R143a for the geothermal power generation using abandoned oil wells. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：238 / 245

页数：8

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