Performance evaluation on heat pump water heater with drop-in refrigerant R1234yf and condenser size modification

Ce Shi, Pega Hrnjak

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Refrigerant and heat exchanger design are significant factors of interest in Heat Pump Water Heater (HPWH) system. This paper presents the experimental study about R1234yf as a low global warming potential (GWP) drop-in substitute of R134a. Then condenser configuration analysis is conducted to explore the effects of condenser circuit number using the baseline R134a. It is experimentally demonstrated that the cooling capacity and COP obtained with R1234yf in a HPWH system is slightly lower than that obtained with R134a. It has been shown that R1234yf can be a desirable alternative for R134a with comparable performance but it is noted that extensive modifications should be considered if the same system performance need to be obtained. By closing the valves at the inlet and outlet of one condenser circuit, a one-circuit condenser system could be achieved. It is shown that a system operating with one-circuit condenser only brings the COP down within 5.5%.

Original languageEnglish (US)
Title of host publicationICR 2019 - 25th IIR International Congress of Refrigeration
EditorsVasile Minea
PublisherInternational Institute of Refrigeration
Pages1813-1820
Number of pages8
ISBN (Electronic)9782362150357
DOIs
StatePublished - 2019
Event25th IIR International Congress of Refrigeration, ICR 2019 - Montreal, Canada
Duration: Aug 24 2019Aug 30 2019

Publication series

NameRefrigeration Science and Technology
Volume2019-August
ISSN (Print)0151-1637

Conference

Conference25th IIR International Congress of Refrigeration, ICR 2019
CountryCanada
CityMontreal
Period8/24/198/30/19

Keywords

  • Condenser
  • Drop-In
  • Heat Pump Water Heater
  • Low GWP
  • Performance
  • R1234yf
  • R134a

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Condensed Matter Physics

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