retrofitting with non-cfc substitutes

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RETROFITTING WITH NON-CFC SUBSTITUTES important to follow the retrofit procedures. 247 low temperature units retrofitted from R-502 to 69L. Evaporation temperature down to appr. -29°C. No lubrication change was necessary. Customers claim that energy requirement has decreased. There seems to be less compressor failures with retrofitted units than with R-502-units. 7 medium temperature units retrofitted from CFC-12 to HFC-134a. Evaporation temperature down to appr. -0°C. Lubricant changed to polyol esteroil. 2 units retrofitted from HFC-134a to 69 L. The retrofitting was done in order to increase the refrigeration capacity in the low temperature range. Lubricant changed to alcylbenzen lubricant. Due to less expensive retrofitting, Thermo King is also preparing for retrofitting from CFC-12 to MP66 for old equipment. 40
RETROFITTING WITH NON-CFC SUBSTITUTES APPENDIX A BIBLIOGRAPHY These are only a selection of documents. OAIC also has access to document abstracts of FRIDOC of the International Institute of Refrigeration (nearly 4000 in 1993). Where an author has indicated his organization, this is identified in the bibliography. Arnaud, D., Macaudiere, S., Tanguy, J.C., Radice, P.F., Elf Atochem S.A.: Properties of blends which can be used as CFC-502 substitutes in refrigeration. Paper presented at the 1992 International CFC and Halon Alternatives Conference, September 29 - October 1 1992, Washington, D.C., U.S.A. pp. 105 - 114 Bitzer, 1993: Refrigerant Report 2, The future has already begun. Perspectives in refrigerant development. No. 9306 E, 12/93. Elf Atochem: Principaux Substituts du R-502. Received from M. Verhille, Elf Atochem May 6, 1994. Elf Atochem: Tech Digest, Forane 404a. Elf Atochem North America. Fleck, J. G., Blue Star Line (NZ) Ltd: Field Experience with Container Refrigeration Units Retrofitted with Alternative Refrigerant and Synthetic Oil. Paper presented in proceedings from commissions B1, B2, D1, D2/3, Cold Chain Refrigeration Equipment by design, 15 - 18 November 1993. Gerdsmeyer, K.D, 1992. HFC-134a (R-134a) in small commercial refrigeration systems: some practical aspects. Paper presented at the 1992 International Refrigeration Conference - Energy Efficiency and New Refrigerants. 14 - 17 July 1992, Purdue University, USA. Hans T. Haukås, 1994: Konvertering av kuldeanlegg med KFK. (Retrofit of refrigeration units with CFC.) Paper presented at Norsk Kjøleteknisk Årsmøte 28 - 30 January 1994. Komatsuzaki, S.; Iizuka, T., 1993. Miscibility and lubricity of polyol ester-based refrigerator lubricants. Paper presented at the 1993 International CFC and Halon Alternatives Conference, 20-22 October 1993, Washington, D.C., U.S.A. pp. 92-100. SINTEF Refrigeration, 1994: Internal paper; Konvertering fra CFC-12 til HFC-134a. (Retrofit from CFC-12 to HFC-134a). Summary from workshops on retrofitting, september 1993 and january 1994. SINTEF Refrigeration, 1993: Brochure: Avvikling av KFK i kuldeanlegg. (Phase-out of CFCs in Refrigeration Plants.) SINTEF Refrigeration, 1992: Blandinger for varmepumper (blend for heat pumps). SFT11 A92069, 1992. 41
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