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Experimental investigation of R454C as a replacement for R410A in a residential heat pump split system.

Number: 2547

Author(s) : HOU W., FARD H. R., BURNS L., GROLL E. A., ZIVIANI D., BRAUN J. E.

Summary

In recent years, environmental concerns accelerated the quest for alternative low-GWP working fluids to replace current HFCs and their blends. However, trade-offs exist between desired performance characteristics and flammability. In this paper, a fully-instrumented 10.5 kW (3RT) residential heat pump split system has been utilized to conduct experimental comparisons between R410A and R454C under both heating and cooling conditions. As R454C has a lower volumetric capacity compared to R410A, a compressor with larger volume displacement was selected for R454C in an attempt to obtain similar capacity as R410A system. A wide range of experimental data has been collected by varying condensing and evaporating temperatures as well as the superheating degree. Moreover, charge sensitivity tests were carried out to investigate the effect of charge on cycle operation, component sizing and system performance. The results showed that, in heating mode, the heating capacity and the system heating COP obtained with R454C were about 6.56~7.66% and approximately 8.37~11.36% lower than the values measured with R410A, respectively. In cooling mode, the cooling capacity and the system cooling COP with R454C were approximately 2.45~10.55% and 6.90~21.23% lower than those obtained with R410A, respectively. The experimental results highlighted the need for optimizing heat exchanger areas as well as compressor displacement to achieve the desired nominal capacity and system performance with a high-glide refrigerant mixture.

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  • Original title: Experimental investigation of R454C as a replacement for R410A in a residential heat pump split system.
  • Record ID : 30030771
  • Languages: English
  • Subject: Technology, HFCs alternatives
  • Source: 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2022

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