期刊
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
卷 84, 期 -, 页码 26-35出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2017.08.010
关键词
Vapor compression system; GWP Drop-in replacement; Zeotropic refrigerant; HFC/HFO mixture; Energy assessment
资金
- Swedish Energy Agency
- Danfoss Varmepumpar AB
- Nibe AB
- Svensk Energi Kylanalys AB
- Bosch Thermoteknik AB
- Universitat Jaume I [POSDOC/2016/23]
- Svenska Kyltekniska Foreningen
The Kigali amendment to the Montreal Protocol has highlighted the hydrofluorocarbons (HFCs) phase out as a priority to reduce the future global mean temperature increase. R134a is the most abundant HFC in the atmosphere and therefore it must be substituted using environmentally benign alternatives. In the short term, blends of HFCs and hydrofluoroolefins can replace R134a. This paper experimentally evaluates R450A (GWP of 547), a nonflammable mixture of R1234ze(E) and R134a, in an R134a small capacity refrigeration system. The controlled experimental conditions cover evaporating temperatures from - 15 to 12.5 degrees C and condensing temperature of 25, 30 and 35 degrees C (36 tests in total for each refrigerant). The experimental results showed that with only a thermostatic expansion valve adjustment the average R450A cooling capacity and COP are 9.9% and 2.9% lower than those measured using R134a. Besides, the observed compressor discharge temperature values of R450A are not greater than that of R134a. (C) 2017 Elsevier Ltd and IIR. All rights reserved.
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