Development of a counter-current model for a vertical fluted tube GAX absorber

Yong Tae Kang, Richard N. Christensen

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

32 Citations (Scopus)

Abstract

The Generator-Absorber Heat Exchanger (GAX) cycle is a general cycle that can use ammonia-water as a absorption fluid. This cycle has been worked on for many years. In this paper, a modeling method is proposed to analyze the heat and mass transfer characteristics of the GAX absorber. Ammonia-water is used as the solution pair. The thermal properties of the solution pair are calculated by computer programs developed by Klein's group. The ammonia vapor and the solution liquid are in counter-current flow in the absorber, and the coolant flows counter to the solution liquid. In this model, a design method for the GAX absorber is proposed for counter-current flow. Seven fluted tubes were installed vertically within a can in the absorber. The GAX absorber has two different heat transfer modes. One is thin liquid film heat transfer on the wall, and the other is absorption at the interface between the vapor and liquid. The absorber also has mass transfer from the bulk vapor region to the interface. This paper proposes that the heat transfer resistance on the liquid film is very small compared with the coolant side, and the mass transfer in the vapor region has a considerable effect on the absorber size.

Original languageEnglish
Title of host publicationProceedings of the International Absorption Heat Pump Conference
PublisherPubl by ASME
Pages7-16
Number of pages10
ISBN (Print)0791806987
Publication statusPublished - 1994
Externally publishedYes
EventProceedings of the International Absorption Heat Pump Conference - New Orleans, LA, USA
Duration: 1994 Jan 191994 Jan 21

Publication series

NameProceedings of the International Absorption Heat Pump Conference

Other

OtherProceedings of the International Absorption Heat Pump Conference
CityNew Orleans, LA, USA
Period94/1/1994/1/21

ASJC Scopus subject areas

  • Engineering(all)

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