Mixed refrigerant composition shift due to throttle valves opening in auto cascade refrigeration system

doi:10.1016/j.cjche.2013.06.001

Chin.J.Chem.Eng. ›› 2015, Vol. 23 ›› Issue (1): 199-204.DOI: 10.1016/j.cjche.2013.06.001

• CHEMICAL ENGINEERING THERMODYNAMICS • Previous Articles Next Articles

Mixed refrigerant composition shift due to throttle valves opening in auto cascade refrigeration system

Xiongwen Xu^1,2, Jinping Liu^1,3, Le Cao¹

1 School of Electric Power, South China University of Technology, Guangzhou 510640, China;
2 Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, Guangzhou 510640, China;
3 State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China

Received:2013-04-02 Revised:2013-06-25 Online:2015-01-24 Published:2015-01-28
Contact: Jinping Liu
Supported by:
Supported by the China Postdoctoral Science Foundation (2014M552195), the State Key Laboratory Foundation of Subtropical Building, South China University of Technology (2013ZC13) and the Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, South China University of Technology (2013A061401005).

Mixed refrigerant composition shift due to throttle valves opening in auto cascade refrigeration system

Xiongwen Xu^1,2, Jinping Liu^1,3, Le Cao¹

1 School of Electric Power, South China University of Technology, Guangzhou 510640, China;
2 Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, Guangzhou 510640, China;
3 State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China

通讯作者: Jinping Liu
基金资助:
Supported by the China Postdoctoral Science Foundation (2014M552195), the State Key Laboratory Foundation of Subtropical Building, South China University of Technology (2013ZC13) and the Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, South China University of Technology (2013A061401005).

Abstract

Abstract: Auto cascade refrigeration (ACR) cyclewith phase separators is widely used in the cryogenic system. The composition of mixed refrigerant has a great effect on the performance of the system. Based on the assumption of infinite volume of phase separator, ACR systemwith one phase separator is simulated in this paper. The variation of refrigerant composition under different valves opening is obtained. A related experimental systemis set up to verify the variation. The result shows that when the valve opening connected to the evaporator increases or the valve opening under the phase separator decreases, the low-boiling component concentration of the working mixture passing through the compressor and condenser increases, while the high-boiling component concentration decreases. Furthermore, the variations of condensation pressure and evaporation pressure under different valves opening are also observed. This paper is helpful to deepen the understanding of ACR system.

Key words: Auto cascade, Refrigeration, Composition shift, Throttle

摘要： Auto cascade refrigeration (ACR) cyclewith phase separators is widely used in the cryogenic system. The composition of mixed refrigerant has a great effect on the performance of the system. Based on the assumption of infinite volume of phase separator, ACR systemwith one phase separator is simulated in this paper. The variation of refrigerant composition under different valves opening is obtained. A related experimental systemis set up to verify the variation. The result shows that when the valve opening connected to the evaporator increases or the valve opening under the phase separator decreases, the low-boiling component concentration of the working mixture passing through the compressor and condenser increases, while the high-boiling component concentration decreases. Furthermore, the variations of condensation pressure and evaporation pressure under different valves opening are also observed. This paper is helpful to deepen the understanding of ACR system.

关键词: Auto cascade, Refrigeration, Composition shift, Throttle

Xiongwen Xu, Jinping Liu, Le Cao . Mixed refrigerant composition shift due to throttle valves opening in auto cascade refrigeration system[J]. Chin.J.Chem.Eng., 2015, 23(1): 199-204.

Xiongwen Xu, Jinping Liu, Le Cao . Mixed refrigerant composition shift due to throttle valves opening in auto cascade refrigeration system[J]. Chinese Journal of Chemical Engineering, 2015, 23(1): 199-204.

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Mixed refrigerant composition shift due to throttle valves opening in auto cascade refrigeration system

Mixed refrigerant composition shift due to throttle valves opening in auto cascade refrigeration system

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