Optimization Study on Fluids for the Gravity-Driven Organic Power Cycle

doi:10.3390/en12040732

	Optimization Study on Fluids for the Gravity-Driven Organic Power Cycle
	Shi WX 1,2; Pan LS(潘利生)3
通讯作者	Pan, Lisheng(panlisheng@imech.ac.cn)
发表期刊	ENERGIES
	2019-02-02
卷号	12 期号:4 页码:19
ISSN	1996-1073
摘要	The organic Rankine cycle (ORC) is efficient in using low-grade heat energy, while low pump efficiency and high pump leakage are usually serious problems. A gravity-driven organic power cycle (GDOPC) uses gravity instead of a pump to pressurize working fluid and has the potential to avoid problems associated with the pump. A theoretical method is used to study the performance and suitability of several fluids for GDOPC. The results show that the flow efficiency in high vertical pipes and the pump efficiency determine whether GDOPC gives better performance than ORC or not. When R245fa is selected as working fluid and evaporating temperature is 62 degrees C, specific energy of GDOPC (flow efficiency is 80%) is 2.5% higher than that of ORC (pump efficiency is 60%). The improvement degree of specific energy and the liquid column height increase with increasing evaporating temperature. R1234yf and R227ea give good performance with specific energy of 4.84 kJ/kg and 4.82 kJ/kg, respectively, while they need a liquid column as much as 76.55 m and 45.65 m, respectively. Although R365mfc and cyclopentane do not give the most excellent cycle performance, they need liquid column height as low as 9.04 m and 10.88 m, respectively. Fluid with low saturated pressure and high density may need low liquid column height and has the advantage to be used in practical applications.
关键词	gravity driven organic power cycle (GDOPC) organic Rankine cycle (ORC) theoretical study fluid optimization
DOI	10.3390/en12040732
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000460667700158
关键词[WOS]	RANKINE-CYCLE ; WORKING FLUIDS ; EXPANDER ; DESIGN ; SELECTION ; CRITERIA
WOS研究方向	Energy & Fuels
WOS类目	Energy & Fuels
资助项目	National Natural Science Foundation of China[51776215] ; Beijing Natural Science Foundation[3172008] ; Beijing Natural Science Foundation[3192042] ; Fundamental Research Funds for Beijing University of Civil Engineering and Architecture[X18143]
项目资助者	National Natural Science Foundation of China ; Beijing Natural Science Foundation ; Fundamental Research Funds for Beijing University of Civil Engineering and Architecture
论文分区	二类
力学所作者排名	1
RpAuthor	Pan, Lisheng
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/78949
专题	高温气体动力学国家重点实验室
作者单位	1.Beijing Univ Civil Engn & Architecture, Sch Environm & Energy Engn, Beijing 100044, Peoples R China; 2.Beijing Univ Civil Engn & Architecture, Beijing Engn Res Ctr Sustainable Energy & Bldg, Beijing 100044, Peoples R China; 3.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Shi WX,Pan LS. Optimization Study on Fluids for the Gravity-Driven Organic Power Cycle[J]. ENERGIES,2019,12,4,:19.
APA	Shi WX,&潘利生.(2019).Optimization Study on Fluids for the Gravity-Driven Organic Power Cycle.ENERGIES,12(4),19.
MLA	Shi WX,et al."Optimization Study on Fluids for the Gravity-Driven Organic Power Cycle".ENERGIES 12.4(2019):19.

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