Analysis of absorption process in a smooth-tube heat exchanger with a porous medium

Yong Tae Kang, Richard N. Christensen, Kambiz Vafai

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In this article the absorption process in a smooth-tube heat exchanger (GAX absorber) with a porous medium is analyzed and a countercurrent model for GAX absorber that includes an absorption process within the porous medium is proposed. The absorption process is separated into three regions, a vapor region without a porous medium (region I), a vapor region within a porous medium (region II), and a liquid region within a porous medium (region III). The effects of thermal conductivities and porosities of the porous medium on the absorption rate and the required tube length are investigated, and the Nusselt number within each region is also predicted. The results show that the absorption rate increases with an increase of the thermal conductivity and with a decrease in porosity of the porous medium. The optimum value of the ratio of thermal conductivities (kp/k1) was found to be 5.0, and the optimum value of the porosity was found to be larger than 0.2.

Original languageEnglish
Pages (from-to)42-55
Number of pages14
JournalHeat Transfer Engineering
Volume15
Issue number4
Publication statusPublished - 1994 Oct 1
Externally publishedYes

Fingerprint

tube heat exchangers
Tubes (components)
Porous materials
Thermal conductivity
thermal conductivity
Porosity
porosity
absorbers
Vapors
vapors
Nusselt number
tubes
Liquids
liquids

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fluid Flow and Transfer Processes
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Fuel Technology

Cite this

Analysis of absorption process in a smooth-tube heat exchanger with a porous medium. / Kang, Yong Tae; Christensen, Richard N.; Vafai, Kambiz.

In: Heat Transfer Engineering, Vol. 15, No. 4, 01.10.1994, p. 42-55.

Research output: Contribution to journalArticle

Kang, Yong Tae ; Christensen, Richard N. ; Vafai, Kambiz. / Analysis of absorption process in a smooth-tube heat exchanger with a porous medium. In: Heat Transfer Engineering. 1994 ; Vol. 15, No. 4. pp. 42-55.
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