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Performance of heat pumps charged with R170/R290 mixture.

Prestaciones de bombas de calor cargadas con mezcla R170/R290.

Author(s) : KANG D. G., PARK K. J., JUNG D.

Type of article: Article

Summary

This article is the Spanish translation of an article presented at the IIR conference in Boulder, USA (see the Bulletin of the IIR, reference 2009-2164). In this study, thermodynamic performance of R170/R290 mixture is measured on a heat pump bench tester in an attempt to substitute R22. The bench tester is equipped with a commercial hermetic rotary compressor providing a nominal capacity of 3.5 kW. All tests are conducted under the summer cooling and winter heating conditions of 7/45 and -7/41°C in the evaporator and condenser, respectively. During the tests, the composition of R170 is varied from 0 to 10% with an interval of 2% for R170/R290 mixture. Test results show that the COP and capacity of R290 are up to 15.4% higher and 7.5% lower than those of R22 for two conditions, respectively. For R170/R290 mixture, the COP decreases and the capacity increases with an increase in the amount of R170. The mixture of R170/R290 (4/96) shows a similar capacity and COP as those of R22. For the mixture, the compressor discharge temperature is 17-28°C lower than that of R22. For R170/R290 mixture, there is no problem with mineral oil since the mixture is composed of hydrocarbons. The amount of charge is reduced up to 58% as compared to R22. Overall, R170/R290 mixture is a good long term 'drop-in' candidate to replace R22 in residential air-conditioners and heat pumps.

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Pages: pp. 58-64 (6 p.)

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Details

  • Original title: Prestaciones de bombas de calor cargadas con mezcla R170/R290.
  • Record ID : 2010-1648
  • Languages: Spanish
  • Source: IIF-IIR/Frío Calor Aire acond. - vol. 38 - n. 425
  • Publication date: 2010/05

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