Thermal performance estimation of ammonia-water plate bubble absorbers for compression/absorption hybrid heat pump application

Chung Woo Jung, Seung Sun An, Yong Tae Kang

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The objectives of this paper are to analyze the heat transfer characteristics during the NH3-H2O absorption process in plate heat exchangers and to develop the experimental correlations of the heat transfer coefficient for the compression/absorption hybrid heat pump application. The parametric analysis on the effects of the absorber internal pressure, ammonia weak solution concentration and absorber geometric dimensions on the absorber capacity and system COP (coefficient of performance) is carried out. From the experimental results, the maximum absorber capacity of 7.3kW, COP of 2.66 and the maximum hot water outlet temperature of 80.7°C are obtained. It is concluded that the heat transfer coefficient of solution side increases with increasing the aspect ratio (L/D) while it does not significantly depend upon the aspect ratio (W/D). Finally, an experimental Nusselt number correlation is developed with ±20% error band and compared with the other correlation from the literature.

Original languageEnglish
Pages (from-to)371-378
Number of pages8
JournalEnergy
Volume75
DOIs
Publication statusPublished - 2014 Jan 1

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Heat transfer coefficients
Aspect ratio
Ammonia
Pumps
Nusselt number
Heat exchangers
Water
Heat transfer
Temperature
Hot Temperature

ASJC Scopus subject areas

  • Energy(all)
  • Pollution

Cite this

Thermal performance estimation of ammonia-water plate bubble absorbers for compression/absorption hybrid heat pump application. / Jung, Chung Woo; An, Seung Sun; Kang, Yong Tae.

In: Energy, Vol. 75, 01.01.2014, p. 371-378.

Research output: Contribution to journalArticle

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