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Performance evaluation and optimization of lower GWP refrigerants in a residential heat pump.

Number: 1106

Author(s) : MEDINA J., HUGHES J.

Summary

R-410A is the prevailing fluid in stationary air conditioning and heat pump applications. Its global warming impact, however, has garnered attention for lower GWP options. Existing alternatives include R-32 and R454B, which provide notable GWP reductions from R-410A (AR4 GWPs of 2088 vs. 675 and 465 respectively). Although R-454B may prove to be a long-term solution, system optimizations, such as variable speed compressor use and heat exchanger changes, enable the use of even lower GWP fluids.This paper explores the performance of several low GWP refrigerants (<300 GWP) in stationary air conditioning and heating applications. A commercial, residential R-410A heat pump was modified, per OEM guidance, with a suitable variable speed compressor. The heat pump and corresponding evaporator were placed in a pair of environmental chambers. The evaluated refrigerants consisted of blended HFO-based compositions. Variable speed compressor use allowed each fluid to match R-410A air-side capacities.Presented data will include the following: air-side capacities, energy efficiencies, compressor speeds, and operating parameters. These performance metrics and operating conditions will be compared to those of R410A. Performance will consist of both air-conditioning and heating environmental conditions, following the guidelines of AHRI 210/240. These blends further extend the potential options of low GWP alternatives, utilizing optimization technologies such as a variable speed compressor.

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Pages: 7 p.

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Details

  • Original title: Performance evaluation and optimization of lower GWP refrigerants in a residential heat pump.
  • Record ID : 30033557
  • Languages: English
  • Subject: Environment
  • Source: 14th IEA Heat Pump Conference 2023, Chicago, Illinois.
  • Publication date: 2023/05

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