Performance tests of R-22 and R-32/R-125/R-134a mixture for baseline air conditioning and liquid over-feeding operations
- Oak Ridge National Lab., TN (United States)
- Dept. of Energy, Washington, DC (United States)
Much experimental and theoretical analysis of potential R-22 replacements has been accomplished. However, published information regarding the experimental analysis of any off-the-shelf air conditioners with a potential R-22 replacement at realistic operating conditions is still rare. This type of work could be useful because it would provide baseline data for comparing the performance of R-22 and its potential replacement at drop-in conditions. In this study, an off-the-shelf window air conditioners was tested at Air Conditioning and Refrigeration Institute (ARI)-rated indoor conditions and at different ambient temperatures, include the ARI-rated outdoor condition, with R-22 and with its potential replacement, a ternary mixture of R-32(30%)/R-125(10%)/R-134a(60%) (the ternary mixture). A test rig was built that provided for baseline operation and for the option of operating the system with a flooded evaporator by means of liquid overfeeding (LOF). The test results indicated that the cooling capacity of the ternary mixture was 7.7% less than that of R-22 at 95 F ambient for baseline operation. The cooling capacity for both refrigerants improved when a flooded evaporator, or LOF, was used. For LOF operation, the cooling capacity of the ternary mixture was only 1.1% less than that of R-22. The ternary mixture had slightly higher compressor discharge pressure, a lower compressor discharge temperature, slightly lower compressor power consumption, and a higher compressor high/low pressure ratio.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 211863
- Report Number(s):
- CONF-950624-; TRN: IM9617%%179
- Resource Relation:
- Conference: Annual meeting of the American Society of Heating, Refrigeration and Air-Conditioning Engineers, Inc. (ASHRAE), San Diego, CA (United States), 24-28 Jun 1995; Other Information: PBD: 1995; Related Information: Is Part Of ASHRAE transactions 1995: Technical and symposium papers. Volume 101, Part 2; PB: 1497 p.
- Country of Publication:
- United States
- Language:
- English
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