Investigation on geothermal binary-flashing cycle employing zeotropic mixtures as working fluids

GIEC OpenIR

	Investigation on geothermal binary-flashing cycle employing zeotropic mixtures as working fluids
	Wang, Lingbao 1; Bu, Xianbiao1 ; Li, Huashan1
	2019
发表期刊	GEOTHERMAL ENERGY
ISSN	2195-9706
卷号	7 期号:1
摘要	The binary-flashing cycle (BFC) is supposed to be a promising technology for geothermal recovery due to the full use of geofluid. For further performance improvement, the potential of using mixtures of a hydrocarbon and a retardant in the BFC system is investigated. R245fa is selected as a retardant and blended with R600 to form zeotropic mixtures. With the thermal efficiency (eta(th)), exergy efficiency (eta(ex)), net power output per ton geofluid (PRW), and exergy destruction rate (E-d) as evaluation indexes, the flowsheet modeling and optimization are conducted to explore the optimal compositions and operating parameters. It is revealed the optimal mass fraction of R600/R245fa is 0.44/0.56, at which the flammability of R600 is suppressed, the global warming potential (GWP) of R245fa is reduced. The maximum eta(ex) and PRW are higher than those of component fluids. The maximum E-d occurs in the heat exchanger, which should be optimized. The recommended generation pressures are 1200-1430, 1240-1480, 1220-1460, and 1170-1420 kPa, respectively, for R600 mass fraction of 0.2, 0.4, 0.6, and 0.8. In addition, the flashing temperature is also optimized. Although the mixtures do not always yield superior performance, it is still beneficial to apply the mixtures to the BFC system through systematic consideration of safety and environmental friendliness.
语种	英语
资助项目	[National Key R&D Program of China] ; [Natural Science Foundation of Guangdong Province] ; [National Natural Science Foundation of China]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/26535
专题	中国科学院广州能源研究所
作者单位	1.Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences 2.CAS Key Lab Renewable Energy 3.Guangdong Prov Key Lab New & Renewable Energy Res
推荐引用方式 GB/T 7714	Wang, Lingbao,Bu, Xianbiao,Li, Huashan. Investigation on geothermal binary-flashing cycle employing zeotropic mixtures as working fluids[J]. GEOTHERMAL ENERGY,2019,7(1).
APA	Wang, Lingbao,Bu, Xianbiao,&Li, Huashan.(2019).Investigation on geothermal binary-flashing cycle employing zeotropic mixtures as working fluids.GEOTHERMAL ENERGY,7(1).
MLA	Wang, Lingbao,et al."Investigation on geothermal binary-flashing cycle employing zeotropic mixtures as working fluids".GEOTHERMAL ENERGY 7.1(2019).