Near-azeotropic refrigerants as alternatives for R502.
Author(s) : SHIFLETT M. B., YOKOZEKI A.
Type of article: Article
Summary
Practical tests have been carried out on two near-azeotropic refrigerant mixtures developed as drop-in replacements for R502 in existing equipment. These are blends of R125, R290 and R22. The first was tested in several cube ice machines designed for R502 containing hermetic compressors, air-cooled condensers and capillary tubes or expansion valves. The tests indicated a small increase in ice production using the same power, but with a slightly higher discharge temperature than R502. The second, tested in a supermarket display cabinet, showed almost identical performance at both -40 and -30 deg C evaporation, but with a small increase in power at the lower temperature. Leakage tests indicate no significant changes in percentages of constituents. A third refrigerant blend of R125, R143a and R134a is recommended for zero ozone depletion. D.W.H.
Details
- Original title: Near-azeotropic refrigerants as alternatives for R502.
- Record ID : 1993-3238
- Languages: English
- Source: ASHRAE Journal - vol. 35 - n. 2
- Publication date: 1993/02
- Document available for consultation in the library of the IIR headquarters only.
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R502 substitutes for supermarket applications.
- Author(s) : RINNE F., KRUSE H.
- Date : 1992/12
- Languages : German
- Source: Kälte + Klimatechnik (Die) - vol. 45 - n. 12
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CFC phase-out from commercial refrigeration in ...
- Author(s) : FAWCETT D.
- Date : 1993/03
- Languages : English
- Source: AIRAH J. - vol. 47 - n. 3
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Experimental evaluation of refrigerant mixtures...
- Author(s) : CAMPORESE R., BIGOLARO G., BOBBO S., CORTELLA G.
- Date : 1997/01
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 20 - n. 1
- Formats : PDF
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The impact of new refrigerants on the Australia...
- Author(s) : GRAHAM J.
- Date : 1992/03
- Languages : English
- Source: AIRAH J. - vol. 46 - n. 3
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More blends coming.
- Date : 1993/02
- Languages : English
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