International Journal of Air-Conditioning and Refrigeration
- 제6권
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- Pages.36-44
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- 1998
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- 2010-1325(pISSN)
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- 2010-1333(eISSN)
An Experimental Investigation of Thermodynamic Performance of R-22 Alternative Blends
- Kim, Chang-Nyeon (Graduate School, Ajou University) ;
- Park, Young-Moo (School of Mechanical and Industrial Engineering, Ajou University)
- 발행 : 1998.08.01
초록
R-410a and R-407c which have the best potential among R-22 alternatives were tested as drop-in refrigerants against a set of R-22 baseline tests. The performance evaluations were carried out in a psychometric calorimeter test facility using the residential spilt type air conditioner under the ARI rating conditions. Except the lubricant and hand-operated expansion valve, the other parts of the air conditioner were the same with the commercial system. Performance characteristics were measured; compressor power, capacity, VCR, mass flow rate and COP. The tests showed that R-407c can be directly charged into the current refrigeration system because its vapor pressure and other thermochemical properties are similar to those of R-22. However, it is required to change the volume flow rate of compressor in order to achieve the volumetric capacity of R-22. This results from its relatively small VCR and capacity. Meanwhile, R-410a has vapor pressure values too high to be substituted for the current system and this resulted relatively low COP of R-410a compared to that of R-22.