Optimization of Residential Air Source Heat Pump using Low–Global Warming Potential Refrigerants

Journal Article · 30 March 2022 · Heat Pumping Technologies Magazine

DOI: https://doi.org/10.23697/mx27-6e89 · OSTI ID:1872824

Li, Zhenning  ^[1]; Yana Motta, Samuel ^[1]; Shen, Bo  ^[1]; Fricke, Brian  ^[1]

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1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

We report low–global warming potential refrigerants can significantly reduce the direct emissions of CO₂ originating from HVAC systems. However, high-efficiency systems are needed to reduce indirect CO₂ emissions. In this study, an R410A residential 5-Ton heat pump was optimized using R32, R454A, R454B, R454C, and R455A. Among these options, R455A and R454C have the lowest global warming potential but have lower volumetric capacity and high glide. Optimization results using 5 mm tube heat exchangers showed 12.4% to 19.1% efficiency improvements and 13% to 33% reduction in CO₂ emissions.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1872824
• Journal Information: Heat Pumping Technologies Magazine, Journal Name: Heat Pumping Technologies Magazine Journal Issue: 1 Vol. 42; ISSN 2543-2028
• Publisher: IEA Heat Pump CentreCopyright Statement
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION