Energy and environmental performance of vapor injection heat pumps using R134a, R152a, and R1234yf under various injection conditions

Heegyu Maeng, Jinyoung Kim, Soonbum Kwon, Yongchan Kim

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Vapor injection heat pumps have been used to mitigate performance degradation under severe operating conditions. Low-global-warming-potential (GWP) refrigerants have been used to replace R134a in heat pumps to comply with F-gas regulations. However, experimental and optimization analyses of vapor-injection heat pumps with low-GWP refrigerants are limited in terms of injection conditions. In this study, the energy and environmental performance of vapor-injection heat pumps containing low-GWP refrigerants were experimentally investigated under various injection conditions. The capacity and coefficient of performance (COP) of the vapor-injection heat pumps using R152a and R1234yf were optimized and compared to those using R134a under various injection conditions. The optimized vapor-injection heat pump using R152a increased the heating and cooling COPs by 5.7% and 1.3%, respectively, compared to those using R134a because of its lower power consumption. In addition, the life-cycle climate performance (LCCP) of the optimized vapor-injection heat pumps using R152a and R1234yf were 4.7% lower and 3.0% higher, respectively, than those using R134a under practical conditions. Overall, R152a is recommended as a preferred alternative for vapor-injection heat pumps because of its high COP and low LCCP.

Original languageEnglish
Article number128265
JournalEnergy
Volume280
DOIs
Publication statusPublished - 2023 Oct 1

Bibliographical note

Funding Information:
This work was supported by the Korea Agency for Infrastructure Technology Advancement ( KAIA ) grant funded by the Ministry of Land, Infrastructure and Transport (Grant RS-2020-KA-157909 ).

Publisher Copyright:
© 2023 Elsevier Ltd

Keywords

  • Heat pump
  • Injection ratio
  • Low GWP refrigerant
  • Vapor injection

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Modelling and Simulation
  • Renewable Energy, Sustainability and the Environment
  • Building and Construction
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Pollution
  • Mechanical Engineering
  • General Energy
  • Management, Monitoring, Policy and Law
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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