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IIR document

Low refrigerant charge air to water domestic heat pump using R-290 as the refrigerant.

Number: 0831

Author(s) : BEEK M. van, GORP T. van

Summary

The design process and the final design of a demonstration prototype air to water heat pump using a low refrigerant charge of R-290 is described. Component selection is supported by refrigerant charge calculation and experimental investigation using the PVT-superheat method. It is shown that the charge calculations and measurements agree within 6% based on the complete system. The prototype, having a R-290 refrigerant charge of 150 g and built using commercially available components, has a measured nominal heating capacity of 3.4 kW, and a measured system COP of 4.5 at A7/W35 (EN 14511). When combined with an A-label natural gas boiler, in hybrid configuration, A++ efficiency class results ((EU) No 811/2013). Comparison with measurement results of a commercially available hybrid heat pump, shows that the efficiency levels of the prototype correspond with current state of the art systems.

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Pages: 12

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Details

  • Original title: Low refrigerant charge air to water domestic heat pump using R-290 as the refrigerant.
  • Record ID : 30031466
  • Languages: English
  • Subject: Technology
  • Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Publication date: 2023/08/21
  • DOI: http://dx.doi.org/10.18462/iir.icr.2023.0831

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