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http://dx.doi.org/10.6110/KJACR.2011.23.12.791

Performance of HFC32/HFC125 Mixtures for Heat Pumps  

Kim, Wook-Jin (Department of Mechanical Engineering, Inha University)
Kang, Dong-Gyu (Department of Mechanical Engineering, Inha University)
Lee, Yo-Han (Department of Mechanical Engineering, Inha University)
Jung, Dong-Soo (Department of Mechanical Engineering, Graduate School, Inha University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.23, no.12, 2011 , pp. 791-798 More about this Journal
Abstract
In this study, performance of R410A(50%R32/50%R125) and HFC32/HFC125 mixture is measured to examine the effect of composition shift of R410A used for various air-conditioners and heat pumps. The composition of HFC32/HFC125 mixture varies from the reference composition of R410A ${\pm}10%$ with 5% interval. Tests carried out in a heat pump bench tester at the evaporation and condensation temperatures of $7/45^{\circ}C$ and $-7/41^{\circ}C$ for summer and winter conditions, respectively. Test results show that both the coefficient of performance (COP) and compressor power of the HFC32/HFC125 mixture have the maximum difference of 2.0% as compared to those of R410A. Compressor discharge temperatures of HFC32/HFC125 mixture are increased up to $6.7^{\circ}C$ as compared to that of R410A. The amount of charge for HFC32/HFC125 mixture vary within 5.6% as compared to that of R410A. Overall, performance of R410A is not appreciably affected by the composition shift of ${\pm}10%$ of R32 under both air-conditioning and heat pumping conditions.
Keywords
Coefficient of Performance; R410A; Refrigerant mixture of R32/R125; Capacity; Heat pump; Air-conditioning; Discharge temperature;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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