Thermo-economic investigation of binary flashing cycle for enhanced geothermal system

doi:10.1016/j.geothermics.2020.101951

	Thermo-economic investigation of binary flashing cycle for enhanced geothermal system
	Wang, Lingbao 1,2,3; Li, Huashan 1,2,3; Bu, Xianbiao 1,2,3
刊名	GEOTHERMICS
	2021
卷号	89 页码:9
关键词	Binary flashing cycle Enhanced geothermal system Geothermal well depth Thermoeconomic analysis Operating parameters
ISSN号	0375-6505
DOI	10.1016/j.geothermics.2020.101951
通讯作者	Bu, Xianbiao(buxb@ms.giec.ac.cn)
英文摘要	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.
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
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000595925900005
资助机构	National Key Research and Development Program of China ; Natural Science Foundation of Guangdong Province ; Youth Innovation Promotion Association, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/32364]
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.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China
推荐引用方式 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.