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Refrigerant charge distribution in brine-to-water heat pump using R290 as refrigerant.

Author(s) : SANCHEZ MORENO GINER L., METHLER T., BARCELÓ RUESCAS F., GONZÁLVEZ-MACIÁ J.

Type of article: IJR article

Summary

This paper presents experimental results from a brine-to-water heat pump used for space heating at low temperature, with a low refrigerant charge of R290 (propane). Performance and refrigerant distribution were analysed in every test condition studied. Performance results show a declared heating capacity of 9.5 kW, obtaining a specific capacity of 48.7 kW rmkg and a seasonal coefficient of performance of 4.01. In terms of refrigerant distribution, at the nominal point, 41.5% of the refrigerant is located in the compressor, mainly dissolved in the oil, and the rest is separated almost evenly in both heat exchangers, 23.9% in the condenser and 27.8% in the evaporator; having the lines and accessories (pneumatic-ball valves) the remaining 6.8%. Due to this fact, reducing oil solubility by heating the crankcase or increasing the superheat (SH) has a positive impact on the refrigerant charge reduction, but it also affects the coefficient of performance.

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Pages: 158-167

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Details

  • Original title: Refrigerant charge distribution in brine-to-water heat pump using R290 as refrigerant.
  • Record ID : 30030805
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 145
  • Publication date: 2023/01
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2022.10.013

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