Effects of refrigerant charge and structural parameters on the performance of a direct-expansion solar-assisted heat pump system

doi:10.1016/j.applthermaleng.2014.07.077

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	Effects of refrigerant charge and structural parameters on the performance of a direct-expansion solar-assisted heat pump system
	Zhang, D.1; Wu, Q.B.1,2; Li, J.P.1; Kong, X.Q.3
刊名	Applied Thermal Engineering
	2014-12-05
卷号	73 期号:1 页码:522-528
关键词	Coefficient of performance Expansion Heat pump systems Pumps Refrigeration Direct expansion Mathematical calculations Refrigerant charge Refrigerant distributions Refrigerant mass charge Solar assisted heat pump Solar assisted heat pump systems Structural parameter
ISSN号	13594311
DOI	10.1016/j.applthermaleng.2014.07.077
英文摘要	The direct-expansion solar-assisted heat pump (DX-SAHP) is widely studied as a refrigeration system, which can supply hot water for domestic use during the whole year. The system refrigerant charge and structure parameters are believed to have a great effect on the cycling thermal performance. The refrigerant mass charge including two-phase and single-phase in heat exchangers and pipes is calculated with distributed and lumped parameter approach mathematical models, respectively. Based on the system simulation program, the refrigerant distribution characteristics and system performance under varied structural parameters are obtained. The mathematical calculation results show that the 70%-80% refrigerant charge exists in the condenser and collector; the optimum refrigerant charge, solar collector area, condenser pipe length and condenser internal diameter for the system are 1.65-1.75 kg, 6.0 m2, 70 m and 9 mm, respectively. In the optimum parameters, the better system performance and feasible cost can be achieved. © 2014 Elsevier Ltd. All rights reserved.
WOS研究方向	Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000346543400053
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150438]
专题	兰州理工大学
作者单位	1.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2.Cold and Arid Regions Environmental Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 3.School of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China
推荐引用方式 GB/T 7714	Zhang, D.,Wu, Q.B.,Li, J.P.,et al. Effects of refrigerant charge and structural parameters on the performance of a direct-expansion solar-assisted heat pump system[J]. Applied Thermal Engineering,2014,73(1):522-528.
APA	Zhang, D.,Wu, Q.B.,Li, J.P.,&Kong, X.Q..(2014).Effects of refrigerant charge and structural parameters on the performance of a direct-expansion solar-assisted heat pump system.Applied Thermal Engineering,73(1),522-528.
MLA	Zhang, D.,et al."Effects of refrigerant charge and structural parameters on the performance of a direct-expansion solar-assisted heat pump system".Applied Thermal Engineering 73.1(2014):522-528.