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Propane as working fluid for heat pump water heaters- opportunities and challenges.

Number: 2504

Author(s) : NAWAZ K., RENDALL J., ELATAR A., SU 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, condenser discharge temperature, thermal stratification in the water tank, and total refrigerant charge have been established and compared to the baseline system. A drop-in-replacement study indicates that the system can provide reasonable performance with a substantial reduction in refrigerant charge in the system. To further reduce the refrigerant charge in the system, a comprehensive work plan has been developed which focused on individual components including the evaporator, compressor, and condenser. The objective of the study is to develop a roadmap for next- generation heat pump water heaters which are compatible with hydrocarbons as refrigerants and can be deployed safely for domestic applications.

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Pages: 8 p.

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Details

  • Original title: Propane as working fluid for heat pump water heaters- opportunities and challenges.
  • Record ID : 30030756
  • 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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