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Evaluation of existing refrigerant charge determination methods for residential heat pumps using a virtual test bench.

Number: 0157

Author(s) : JOUNAY M., CAURET O., TEUILLIERES C., TRAN C. T.

Summary

Detecting and quantifying refrigerant leakages in residential heat pumps at an early stage is a major stake to maintain their efficiency and extend their lifespan. Several methods of leakage detection and refrigerant charge determination already exist. However, most focus on refrigerating or air-conditioning systems involving fixed-speed compressors and fixed orifice valves, lacking the dynamic aspects of more recent devices tending to smooth out the impacts of a leakage on the system.
This article first provides a brief insight on the state of the art of refrigerant charge determination methods. Two promising ones were selected, and a virtual test bench was developed and validated to evaluate them. The modeled system is an air-to-water heat pump for heating purpose involving a variable-speed compressor and an electronic expansion valve. These methods proved to be rather efficient on this numeric system, but further experimentation is required to assess them on a real device.

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Pages: 11

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Details

  • Original title: Evaluation of existing refrigerant charge determination methods for residential heat pumps using a virtual test bench.
  • Record ID : 30031379
  • 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.2023.0157

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