Application Research for Pump-driven Loop Heat Pipe System Using R32 to Replace R22

MA Guoyuan; WANG Xuan; ZHOU Feng

doi:10.11936/bjutxb2017080026

Journal of Beijing University of Technology > 2019 > 45(4): 381-388. > DOI: 10.11936/bjutxb2017080026

MA Guoyuan, WANG Xuan, ZHOU Feng. Application Research for Pump-driven Loop Heat Pipe System Using R32 to Replace R22[J]. Journal of Beijing University of Technology, 2019, 45(4): 381-388. DOI: 10.11936/bjutxb2017080026

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Application Research for Pump-driven Loop Heat Pipe System Using R32 to Replace R22

College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

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Received Date: August 20, 2017
Available Online: August 03, 2022
Published Date: April 09, 2019

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Abstract

Abstract

To investigate the heat transfer characteristics of the pump-driven loop heat pipe using R32 to replace R22, an experimental unit of pump-driven loop heat pipe system was built to study the variation of cooling capacity and energy efficiency ratio (EER) of the system by using two refrigerants under different indoor and outdoor temperature differences and different mass flow rates of refrigerants. The performances of different refrigerants were analyzed and compared. Results show that the cooling capacity and EER of R32 unit is higher than that of R22 unit under all experimental conditions, and according to the energy-saving analysis, the starting temperature, running time and average EER of the unit using different refrigerants were contrasted, showing that R32 has the advantages over R22 on energy saving. Meanwhile, R32 unit has the problem of insufficient feed liquid when pump frequencies are low under outdoor high temperature.
- pump-driven loop heat pipe,
- natural cooling,
- R32,
- energy saving for data centers

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References

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Application Research for Pump-driven Loop Heat Pipe System Using R32 to Replace R22