Performance of virtually non-flammable azeotropic HFO1234yf/HFC134a mixture for HFC134a applications

In this study, ‘drop-in’ performance of HFC134a, HFO1234yf and HFO1234yf/HFC134a mixture at three compositions of 5%, 10%, and 15% HFC134a is measured in a heat pump bench tester under summer and winter conditions. Test results show that the COP, capacity, discharge temperature of HFO1234yf and HFO1...

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Bibliographic Details
Published in:International journal of refrigeration 2013-06, Vol.36 (4), p.1203-1207
Main Authors: Lee, Yohan, Kang, Dong-gyu, Jung, Dongsoo
Format: Article
Language:English
Subjects:
Air conditioning. Ventilation
Alternative refrigerant
Applied sciences
Devices using thermal energy
Energy
Energy. Thermal use of fuels
Exact sciences and technology
frigorigène de remplacement
Heat pumps
Heating, air conditioning and ventilation
HFC134a
HFO1234yf
HFO1234yf/HFC134a mixture
Mobile air-conditioner
mélange HFO1234yf/HFC134a
Refrigerating engineering
Refrigerating engineering. Cryogenics. Food conservation
système de conditionnement d'air mobile
Techniques, equipment. Control. Metering
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Summary:In this study, ‘drop-in’ performance of HFC134a, HFO1234yf and HFO1234yf/HFC134a mixture at three compositions of 5%, 10%, and 15% HFC134a is measured in a heat pump bench tester under summer and winter conditions. Test results show that the COP, capacity, discharge temperature of HFO1234yf and HFO1234yf/HFC134a mixture are similar to those of HFC134a. For HFO1234yf/HFC134a mixture, flammability decreases as more HFC134a is added and at compositions of more than 10% of HFC134a, the mixture becomes non-flammable. The amount of charge for HFO1234yf and HFO1234yf/HFC134a mixture is up to 11% lower than that of HFC134a. Since HFO1234yf/HFC134a mixture with 10–11% HFC134a is virtually non-flammable and azeotropic and has no ODP and GWP of less than 150 meeting the requirement of European mobile air-conditioner directive, it can be used as an environmentally friendly solution for various HFC134a applications including mobile air-conditioners with minor modifications.
ISSN:0140-7007
1879-2081
DOI:10.1016/j.ijrefrig.2013.02.015