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Dynamic modeling and charge minimization study of a packaged propane heat pump with external flow reversal for cold climates.

Number: No 102

Author(s) : SHELLY T. J., BARTA R. B., ZIVIANI D., GROLL E. A.

Summary

Buildings consume approximately 40% of the primary energy used in the U.S. The energy-independence challenge is particularly acute for buildings in colder U.S. climates that have a longer heating season. Heating is by far the biggest consumer of energy, accounting for at least 30%, and in some cases as much as 60%, of total energy use. In addition, the gradually phase-down of current refrigerants requires further research to identify suitable low-global warming potential (GWP) replacements. Hydrocarbons represent a possible solution, but their flammability yields to a number of challenges towards the actual commercialization in the residential sector. In this paper, a packaged air-source heat pump with external flow reversible is proposed as a viable solution to safely utilizing flammable refrigerants, such as propane (R-290). The proposed system can also be adapted to serve as a cold-climate heat pump that provides heating, cooling, and domestic hot water. A detailed dynamic model has been developed to evaluate the performance benefits of the proposed system architecture. Moreover, the use of propane as the working fluid reduces the total charge required by the system, which yields to possible down-sizing of the equipment. To this end, a charge minimization study has been carried out to further investigate the trade-off between reduced charge inventory and performance. 

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  • Original title: Dynamic modeling and charge minimization study of a packaged propane heat pump with external flow reversal for cold climates.
  • Record ID : 30029983
  • Languages: English
  • Subject: Technology
  • Source: 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Publication date: 2021/08/31

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