Thermo-Economic Comparison Between Organic Rankine Cycle and Binary-Flashing Cycle for Geothermal Energy

doi:10.3389/feart.2021.759872

GIEC OpenIR

	Thermo-Economic Comparison Between Organic Rankine Cycle and Binary-Flashing Cycle for Geothermal Energy
	Zhao, Yuan 1,2; Du, Bowen 1; Chen, Shunyi 1; Zhao, Jun 2; Gong, Yulie3 ; Bu, Xianbiao3 ; Li, Huashan3 ; Wang, Lingbao 3
	2021-10-07
发表期刊	FRONTIERS IN EARTH SCIENCE
卷号	9 页码:10
通讯作者	Wang, Lingbao(wanglb@ms.giec.ac.cn)
摘要	Geothermal energy is a characteristic of widely distributed, high capacity factor, high reliability, and lower environmental impact potential values. And it will play an important role in achieving the goal of carbon neutral carbon peak. Nonetheless, geothermal energy presents its own particular challenges, i.e., the high investment cost and long payback period. The binary flashing cycle (BFC) system is proved to be a promising power generation technology due to the efficient and full utilization of a low-grade heat source. While the economic performance still needs further evaluation, in the present study, the thermo-economic comparison between organic Rankine cycle (ORC) and the BFC for geothermal energy has been investigated. R245fa has been chosen as the working fluid. Considering the thermodynamic and economic performance simutaneously, several evaluation indicators were selected including thermal efficiency, exergy efficiency, net power output per ton geothermal water, heat exchanger area, and heat recovery efficiency, and the system modeling and comparison were presented. The simulation results reveal that the BFC system obtains 32% more net power output than the ORC system under the working conditions investigated. The heat recovery efficiency of the BFC is 1.96 times as much as that of the ORC, which indicates that the BFC can realize the full utilization of low-grade energy. And more heat exchanger areas are required in the BFC system. What is more, the preliminary discussion of the economic feasibility of BFC system applied in the FengShun geothermal power plant is presented. The payback period of the BFC is just 6.0 years under the generation pressure of 600 kPa. It is indicated that the BFC system has obvious economic benefits, especially in a nonflowing geothermal well.
关键词	geothermal energy organic Rankine cycle binary flashing cycle thermo-economic payback period
DOI	10.3389/feart.2021.759872
关键词[WOS]	WORKING FLUIDS ; GAS-TURBINE ; OPTIMIZATION ; PERFORMANCE ; SELECTION ; DESIGN ; PLANTS
收录类别	SCI
语种	英语
资助项目	Natural Science Foundation of Guangdong Province[2021A1515011763] ; Science and Technology Plan Project of Guangzhou[202102020301] ; China Postdoctoral Science Foundation[2020M681799]
WOS研究方向	Geology
项目资助者	Natural Science Foundation of Guangdong Province ; Science and Technology Plan Project of Guangzhou ; China Postdoctoral Science Foundation
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000709857300001
出版者	FRONTIERS MEDIA SA
引用统计	被引频次：3[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/344007/35122
专题	中国科学院广州能源研究所
通讯作者	Wang, Lingbao
作者单位	1.Powerchina HuaDong Engn Corp Ltd, Hangzhou, Peoples R China 2.Tianjin Univ, MOE, Key Lab Efficient Utilizat Low & Medium Grade Ene, Tianjin, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Yuan,Du, Bowen,Chen, Shunyi,et al. Thermo-Economic Comparison Between Organic Rankine Cycle and Binary-Flashing Cycle for Geothermal Energy[J]. FRONTIERS IN EARTH SCIENCE,2021,9:10.
APA	Zhao, Yuan.,Du, Bowen.,Chen, Shunyi.,Zhao, Jun.,Gong, Yulie.,...&Wang, Lingbao.(2021).Thermo-Economic Comparison Between Organic Rankine Cycle and Binary-Flashing Cycle for Geothermal Energy.FRONTIERS IN EARTH SCIENCE,9,10.
MLA	Zhao, Yuan,et al."Thermo-Economic Comparison Between Organic Rankine Cycle and Binary-Flashing Cycle for Geothermal Energy".FRONTIERS IN EARTH SCIENCE 9(2021):10.