Evaluation of different heat pump systems for sanitary hot water production using natural refrigerants

Miquel Pitarch, Emilio Navarro-Peris, José Gonzálvez-Maciá and José M. Corberán

Applied Energy, 2017, vol. 190, issue C, 919 pages

Abstract: Heat pumps that work with a high degree of subcooling in subcritical systems have shown a significant margin of improvement when working with sanitary hot water applications. Recently, two different approaches to overcome the high degree of subcooling have been presented in the literature: with a subcooler (separate from the condenser) and by making all the subcooling in the condenser. In this paper, a comparative evaluation between both alternatives is presented, and the obtained results are compared with a representative solution already available on the market using natural refrigerants for this application. The results of this analysis have shown that in a system with subcooling in the condenser, it is possible to obtain a COP comparable to that of transcritical CO2 heat pump water heaters. Furthermore, the system with subcooling has been demonstrated experimentally as being capable of producing water up to 90°C and has shown a COP up to 20% higher than some CO2 commercial products (catalogue data reference).

Keywords: Propane; Heat pumps; Natural refrigerants; Sanitary hot water; Subcooling; Energy recovery (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (8)

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DOI: 10.1016/j.apenergy.2016.12.166

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