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A primary reason R-404A has become the preferred refrigerant for commercial refrigeration over the last two decades is its low compressor discharge temperature which provides excellent protection for compressors and significantly improves their operability and durability. However, R-404A is also one of the highest GWP refrigerants in use today and has been targeted by various regulatory agencies for potential phase-down or phaseout. Several reduced GWP options have been proposed using blends of HFCs and hydrofluoroolefins (HFOs) that are around 1300 GWP. However, these blends have increased compressor discharge temperature and in some applications may require external compressor cooling. A new non-flammable refrigerant DR-34 has been developed with low compressor discharge temperature similar to R-404A and closely matches all other properties and performance. This refrigerant will be particularly suitable for transport refrigeration where compressor cooling is difficult to manage under a wide range of ambient conditions. This paper describes experimental testing in both truck and trailer transport refrigeration systems. Results demonstrate cooling capacity, energy efficiency, mass flow and compressor discharge temperature are comparable to R-404A. Miscibility of DR-34 is also measured with a polyol ester lubricant.
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Details
- Original title: R-404A alternative with low compressor discharge temperature.
- Record ID : 30012960
- Languages: English
- Source: 2014 Purdue Conferences. 15th International Refrigeration and Air-Conditioning Conference at Purdue.
- Publication date: 2014/07/14
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Indexing
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Themes:
Compressors;
HFCs;
Blends;
Energy efficiency, energy savings - Keywords: Temperature; Discharge; R404A; Substitute; Performance; GWP; Expérimentation; Refrigerant; Compressor
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