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Research Papers: Energy Systems Analysis

Improving Refrigeration Performance by Using Pressure Exchange Characteristic of Wave Rotor

[+] Author and Article Information
Dapeng Hu

School of Chemical Machinery,
Dalian University of Technology,
No. 2 Linggong Road, Ganjingzi District,
Dalian 116024, Liaoning, China
e-mail: hudp@dlut.edu.cn

Yang Yu

School of Chemical Machinery,
Dalian University of Technology,
No. 2 Linggong Road, Ganjingzi District,
Dalian 116024, Liaoning, China
e-mail: yuyang_oceany@163.com

Peiqi Liu

School of Chemical Machinery,
Dalian University of Technology,
No. 2 Linggong Road, Ganjingzi District,
Dalian 116024, Liaoning, China
e-mail: lpq21cn@dlut.edu.cn

Xiaolin Wu

School of Chemical Machinery,
Dalian University of Technology,
No. 2 Linggong Road, Ganjingzi District,
Dalian 116024, Liaoning, China
e-mail: arya_wu@yahoo.com

Yiming Zhao

School of Chemical Machinery,
Dalian University of Technology,
No. 2 Linggong Road, Ganjingzi District,
Dalian 116024, Liaoning, China
e-mail: 545199342@qq.com

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received October 4, 2017; final manuscript received October 5, 2018; published online November 5, 2018. Assoc. Editor: Esmail M. A. Mokheimer.

J. Energy Resour. Technol 141(2), 022004 (Nov 05, 2018) (8 pages) Paper No: JERT-17-1534; doi: 10.1115/1.4041722 History: Received October 04, 2017; Revised October 05, 2018

Wave rotor with pressure exchange function can be attempted to improve refrigeration performance. The objective of this paper is to verify the feasibility of the method by thermodynamic and experimental analysis. First, a refrigeration process which contains wave rotor pressurization was established. Then, a thermodynamic model which reflects the refrigeration process was designed. The thermal performance was researched under various key parameters. Finally, based on the novel wave rotor refrigeration platform, the experimental work was carried out, and the effects of main parameters of the device were systematically studied. The results showed that it was feasible to enhance the coefficient of performance (COP) by using pressure exchange characteristic of wave rotor. The COP could be improved substantially at relatively small expansion ratio. Under the design point, more than half of the pressure energy could be restored. The performance curve of the novel equipment was also obtained. Enhancing the isentropic efficiency of expansion is the effective means to improve the COP and σ of the system. This paper was designed in a way that contained a novel equipment to enhance the COP of wave rotor refrigeration.

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References

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Figures

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Fig. 1

Pressure-wave thermal separator

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Fig. 2

The structure schematic of wave rotor

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Fig. 3

Principle of the novel refrigeration

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Fig. 4

The curves of the shock compression efficiency with the intensity of shock wave

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Fig. 5

Thermodynamic calculation model

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Fig. 6

T–S diagram of thermodynamic cycles

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Fig. 7

Variation of COP with expansion ratio

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Fig. 8

Curves of performance indexes with expansion ratio

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Fig. 9

Curves of COP and σ with expansion efficiency

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Fig. 10

Curves of COP with expansion ratio

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Fig. 11

Relationship between inlet temperature and system performance

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Fig. 12

Process flow diagram for the novel refrigeration

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Fig. 13

Prototype research

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Fig. 14

The variation of temperature drop with changes of motor frequency

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Fig. 15

The variation of temperature drop with changes of pressure recovery coefficient

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Fig. 16

The curve of temperature drop with expansion ratio

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