Effects of accumulator heat exchangers on the performance of a refrigeration system

Hoon Kang, Kwangmin Choi, Chasik Park, Yongchan Kim

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


An accumulator heat exchanger (AHX) consists of an accumulator and an inner heat exchanger (IHX) contained in a shell. The AHX has been used in multi-air-conditioners to obtain system reliability and high performance by providing liquid refrigerant into expansion devices and preventing wet-compression. Energy is exchanged between the evaporator exit and the condenser exit in the AHX. In this study, the heat transfer characteristics of the AHX were investigated experimentally, and the effects of the AHX on the performance of a refrigeration system using R22 were measured. The operating characteristics of the refrigeration system with the AHX were considerably different from those without the AHX. The AHX system showed higher refrigerant flow rate than the non-AHX system at a constant EEV (electronic expansion valve) opening because of higher subcooling, resulting in better performance and reliability of the refrigeration system. At 50% EEV opening, the cooling capacity and COP of the AHX system were higher than those of the non-AHX system by 7.5% and 3.2%, respectively.

Original languageEnglish
Pages (from-to)282-289
Number of pages8
JournalInternational Journal of Refrigeration
Issue number2
Publication statusPublished - 2007 Mar

Bibliographical note

Funding Information:
This work was supported by the Carbon Dioxide Reduction & Sequestration Center, one of the 21st Century Frontier R&D Programs in the Ministry of Science and Technology of Korea.


  • Air conditioning
  • COP
  • Experiment
  • Heat Exchanger
  • Performance
  • R22
  • Refrigeration system
  • Sous-refroidissement

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering


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