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Deployment of R290 in heat pump water heaters and implications for decarbonization.

Number: 2466

Author(s) : NAWAZ K., RENDALL J., ELATAR A., SUN J.

Summary

Growing awareness of the potential environmental impacts of various refrigerants has led to the phasedown of hydrofluorocarbon (HFC) refrigerants and initiatives replacing HFCs with hydrocarbons or other environmentally friendlier fluids. This study evaluated the performance of R290 (propane) as a substitute for R134a (an HFC) for heat pump water heating (HPWH). Comprehensive experimentation is performed to predict the performance of propane as a refrigerant for a domestic HPWH. Key performance parameters such as unified energy factor, first-hour rating, and total refrigerant charge have been established and compared to the baseline system based on R134a. To reduce the refrigerant charge in the system, a comprehensive work plan has been developed that focuses on individual components including the evaporator, compressor, and condenser. Based on one-to-one comparison it has been found that an R290 system can provide comparable performance with a substantially lower amount of refrigerant charge. The study aims to develop a roadmap for next-generation heat pump water heaters compatible with hydrocarbons as refrigerants and can be deployed safely for domestic applications.

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Pages: 8 p.

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  • Original title: Deployment of R290 in heat pump water heaters and implications for decarbonization.
  • Record ID : 30033112
  • Languages: English
  • Source: 2024 Purdue Conferences. 20th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2024/07/17

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