Energy and Conventional and Advanced Exergy Analyses of Low-Temperature Geothermal Binary-Flashing Cycle Using Zeotropic Mixtures

doi:10.3390/en15103487

GIEC OpenIR

	Energy and Conventional and Advanced Exergy Analyses of Low-Temperature Geothermal Binary-Flashing Cycle Using Zeotropic Mixtures
	Zhao, Yuan 1,2; Du, Bowen 1; Chen, Shunyi 1; Zhao, Jun 2; Guo, Zhipeng 3,4; Wang, Lingbao 4
	2022-05-01
发表期刊	ENERGIES
卷号	15 期号:10 页码:18
通讯作者	Wang, Lingbao(wanglb@ms.giec.ac.cn)
摘要	Due to its deep utilization of geobrine and its high net power output, the binary-flashing cycle (BFC) is deemed to be the future geothermal energy power generation technology. The working fluids considered in present analysis are zeotropic mixtures (R245 /R600a). The system thermodynamic model is built, and the energy and conventional and advanced exergy analyses are carried out to reveal the real optimization potential. It is demonstrated that the optimal ranges of R245fa mass fraction and working fluid dryness at the evaporator outlet are 0.30 similar to 0.50 and 0.40 similar to 0.60, considering the thermodynamic performance and the flammability of the zeotropic mixtures, simultaneously. Conventional exergy analysis indicates that the maximum exergy destruction occurs in the condenser, followed by the expander, evaporator, flashing tank, preheater, high-pressure pump and low-pressure pump. Meanwhile, the advanced exergy analysis reveals that the expander should be given the first priority for optimization, followed by the condenser and evaporator. The BFC has a large potential for improvement due to higher avoidable exergy destruction, about 48.6% of the total system exergy destruction can be reduced. Moreover, the interconnections among system components are not very strong, owing to small exogenous exergy destructions. It also demonstrates the effectiveness of advanced exergy analysis, and the approach can be extended to other energy conversion systems to maximize the energy and exergy savings for sustainable development.
关键词	advanced exergy analysis geothermal energy binary-flashing cycle zeotropic mixtures inerting mass concentration
DOI	10.3390/en15103487
关键词[WOS]	ORGANIC RANKINE-CYCLE ; WORKING FLUID SELECTION ; HEAT-RECOVERY ; OPTIMIZATION ; R245FA
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	Energy & Fuels
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	Energy & Fuels
WOS记录号	WOS:000803337100001
出版者	MDPI
引用统计	被引频次：2[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/344007/36721
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 311122, Peoples R China 2.Minist Educ China, Key Lab Efficient Utilizat Low & Medium Grade Ene, Tianjin 300350, Peoples R China 3.Univ Sci & Technol China, Sch Engn Sci, Hefei 230026, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Yuan,Du, Bowen,Chen, Shunyi,et al. Energy and Conventional and Advanced Exergy Analyses of Low-Temperature Geothermal Binary-Flashing Cycle Using Zeotropic Mixtures[J]. ENERGIES,2022,15(10):18.
APA	Zhao, Yuan,Du, Bowen,Chen, Shunyi,Zhao, Jun,Guo, Zhipeng,&Wang, Lingbao.(2022).Energy and Conventional and Advanced Exergy Analyses of Low-Temperature Geothermal Binary-Flashing Cycle Using Zeotropic Mixtures.ENERGIES,15(10),18.
MLA	Zhao, Yuan,et al."Energy and Conventional and Advanced Exergy Analyses of Low-Temperature Geothermal Binary-Flashing Cycle Using Zeotropic Mixtures".ENERGIES 15.10(2022):18.