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Thermo-economic investigation of binary flashing cycle for enhanced geothermal system
Wang, Lingbao1,2,3; Li, Huashan1,2,3; Bu, Xianbiao1,2,3
2021
发表期刊GEOTHERMICS
ISSN0375-6505
卷号89页码:9
通讯作者Bu, Xianbiao(buxb@ms.giec.ac.cn)
摘要In this paper, as a promising technology, the binary flashing cycle (BFC) is proposed for enhanced geothermal systems (EGS) exploitation. The detailed thermo-economic model is developed. With the thermal efficiency, net power output, total investment cost and levelized energy cost (LEC) as evaluation criteria, the flowsheet modeling and thermo-economic analysis are conducted. It is revealed that larger geothermal well depth and geothermal brine flow rate are in favor for improving system thermal performance. However, it is not always beneficial for the economic performance. There exist the optimal depth (3300 m) and geothermal brine flow rate (57 kg/s), at which the LEC obtains the minimum (0.329 USD/kWh) and (0.328 USD/kWh), respectively. For an economic EGS operation, the geothermal brine flow rate should be no less than 50 kg/s. The influences of operating parameters, including generation temperature, dryness degree at the vapor generator outlet and flashing temperature, on the evaluation criteria are also discussed. To achieve better economic benefits, the generation temperature should be less than 110 degrees C and the dryness should be larger than 0.2. With the flashing temperature 72-82 degrees C, the EGS-BFC yields excellent thermodynamic and economic performance. The present investigation will be helpful for the geothermal well construction, resource mining and generation system operating parameters design.
关键词Binary flashing cycle Enhanced geothermal system Geothermal well depth Thermoeconomic analysis Operating parameters
DOI10.1016/j.geothermics.2020.101951
收录类别SCI
语种英语
资助项目National Key Research and Development Program of China[2018YFB1501805] ; Natural Science Foundation of Guangdong Province[2018A030313018] ; Youth Innovation Promotion Association, Chinese Academy of Sciences[2017402]
WOS研究方向Energy & Fuels ; Geology
项目资助者National Key Research and Development Program of China ; Natural Science Foundation of Guangdong Province ; Youth Innovation Promotion Association, Chinese Academy of Sciences
WOS类目Energy & Fuels ; Geosciences, Multidisciplinary
WOS记录号WOS:000595925900005
出版者PERGAMON-ELSEVIER SCIENCE LTD
引用统计
被引频次:21[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/32365
专题中国科学院广州能源研究所
通讯作者Bu, Xianbiao
作者单位1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
2.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China
3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China
第一作者单位中国科学院广州能源研究所
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GB/T 7714
Wang, Lingbao,Li, Huashan,Bu, Xianbiao. Thermo-economic investigation of binary flashing cycle for enhanced geothermal system[J]. GEOTHERMICS,2021,89:9.
APA Wang, Lingbao,Li, Huashan,&Bu, Xianbiao.(2021).Thermo-economic investigation of binary flashing cycle for enhanced geothermal system.GEOTHERMICS,89,9.
MLA Wang, Lingbao,et al."Thermo-economic investigation of binary flashing cycle for enhanced geothermal system".GEOTHERMICS 89(2021):9.
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