Reduction of real gas losses with a DC flow in the regenerator of the refrigeration cycle

doi:10.1016/j.apenergy.2018.10.096

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	Reduction of real gas losses with a DC flow in the regenerator of the refrigeration cycle
	Cao Qiang; Sun Zheng; Li Zimu; Luan Mingkai; Tang Xiao; Li Peng; Jiang Zhenhua; Wei Li
刊名	APPLIED ENERGY
	2019
卷号	235 期号:无页码:139-146
DOI	10.1016/j.apenergy.2018.10.096
英文摘要	Improving efficiency is an enduring effort for all refrigeration cycles. Real gases cause "intrinsic" heat losses in the regenerator and degrade the coefficient of performance (COP) of the regenerator of the refrigeration cycle. Previous experimental and numerical studies found that the COP of the regenerative refrigerator can be improved by imposing a direct-current (DC) flow, and the liquefaction rate can be improved by several times when the gas is precooled by the regenerator that works down to the temperatures close to or below the critical point However, the working mechanism of such improvements has not been fully explored. In this paper, the working mechanism of imposing a DC flow on the regenerator working with a real gas is revealed based on thermodynamic analyses. The theoretical value of the DC flow and its influence on the COP of the regenerator are analyzed. The results show that the COP of the regenerator can be improved by over 10 times with a DC flow. An even higher relative Carnot COP of around 80% is possible to obtain in some specific temperature ranges. The enthalpy loss and the entropy loss of this approach has been estimated. This approach provides a potential way to improve the refrigeration COP and the liquefaction rate significantly. Measured liquefaction results found in the relevant literature have been analyzed to demonstrate the effectiveness of this approach.
WOS记录号	WOS:000458942800013
内容类型	期刊论文
源URL	[http://202.127.2.71:8080/handle/181331/12354]
专题	上海技术物理研究所_上海技物所
推荐引用方式 GB/T 7714	Cao Qiang,Sun Zheng,Li Zimu,et al. Reduction of real gas losses with a DC flow in the regenerator of the refrigeration cycle[J]. APPLIED ENERGY,2019,235(无):139-146.
APA	Cao Qiang.,Sun Zheng.,Li Zimu.,Luan Mingkai.,Tang Xiao.,...&Wei Li.(2019).Reduction of real gas losses with a DC flow in the regenerator of the refrigeration cycle.APPLIED ENERGY,235(无),139-146.
MLA	Cao Qiang,et al."Reduction of real gas losses with a DC flow in the regenerator of the refrigeration cycle".APPLIED ENERGY 235.无(2019):139-146.