A study of the characteristics of heat transfer for an Ammonia-Water bubble mode absorber in absorption heat pump systems

Jae Cheol Lee, Ki Bong Lee, Byung Hee Chun, Chan Ho Lee, Jong Joo Ha, Sung Hyun Kim

Research output: Contribution to journalArticle

Abstract

An absorber is a major component in absorption refrigeration systems and its performance greatly affects the overall system performance. In this study, experimental analyses of the characteristics of heat transfer for removal of absorption heat in an ammonia-water bubble mode absorber were performed. The heat transfer coefficient was estimated as a function of the input gas flow rate, solution flow rate, temperature, concentration, absorber diameter and height, and input flow direction. The increase of gas and solution flow rate affects positively in heat transfer. However, the increase of solution temperature and concentration affects negatively. Moreover, under the same Reynolds number, countercurrent flow is superior to cocurrent flow in heat transfer performance. In addition, from these experimental data, empirical correlations that can explain easily the characteristics of heat transfer are derived.

Original languageEnglish
Pages (from-to)552-556
Number of pages5
JournalKorean Journal of Chemical Engineering
Volume19
Issue number4
DOIs
Publication statusPublished - 2002 Jul

Keywords

  • Absorption heat pump
  • Absorption process
  • Ammonia-Water
  • Bubble mode
  • Heat transfer

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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