Diffusion absorption refrigeration cycle analysis with low GWP refrigerants

Gawon Lee, Gahyeong Kim, Yong Tae Kang

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

Abstract

Many refrigerant/absorbent pairs such as ammonia/water and various HCFCs or HFCs with organic absorbents have been applied for diffusion absorption refrigeration(DAR) system. However, due to the toxicity and corrosiveness of ammonia and high GWPs of other refrigerants, this study focuses on applying low-GWP refrigerants as alternatives and executing a numerical simulation of the DAR system. R600a/n-Octane is used for the working fluids and helium is chosen as an auxiliary gas. The performance and minimum evaporation temperature characteristics are investigated with different generator temperatures in the range of 85?-160?. The effects of the total system pressure and the evaporation temperature are also considered as the key parameters. It was found that minimum evaporation temperature monotonically dropped as the generator temperature increased. However, the coefficient of performance(COP) reached its peak at a certain point and decreased when the generator temperature increased beyond a critical point. The highest COP was estimated 0.48 at the total system pressure of 3.5 bar and the generator temperature of 85?.

Original languageEnglish
Title of host publicationIIR Rankine 2020 International Conference - Advances in Cooling, Heating and Power Generation, Rankine 2020
PublisherInternational Institute of Refrigeration
Pages194-199
Number of pages6
ISBN (Electronic)9782362150388
DOIs
Publication statusPublished - 2020
Event2020 IIR Rankine International Conference on Advances in Cooling, Heating and Power Generation, Rankine 2020 - Virtual, London, United Kingdom
Duration: 2020 Jul 272020 Jul 31

Publication series

NameRefrigeration Science and Technology
Volume2020-July
ISSN (Print)0151-1637

Conference

Conference2020 IIR Rankine International Conference on Advances in Cooling, Heating and Power Generation, Rankine 2020
CountryUnited Kingdom
CityVirtual, London
Period20/7/2720/7/31

Keywords

  • COP
  • Diffusion absorption refrigeration
  • Evaporation temperature
  • Low-GWP refrigerants
  • R600a

ASJC Scopus subject areas

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

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