Heat exchange between two coupled fixed beds by fluid flow

Jaakko Saastamoinen (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

Heat exchange by forced fluid flow between two coupled fixed beds containing solids can be used to recover heat from hot products to cool input in many industrial processes. The heat exchange between the fixed beds is studied. Analytical solutions for the transient fluid and solid temperature distributions and heat recovery effectiveness are derived. The intra-particle transient temperature distributions are accounted for in the more accurate analysis and the results are compared to lumped analysis. It is shown that the heat recovery effectiveness reaches maximum at certain optimum time instant at which the fluid circulation should be stopped. Damping of cyclic oscillations in fluid temperature or concentration is considered and analytical solution for the damper is presented.
Original languageEnglish
Pages (from-to)2727-2735
Number of pages9
JournalInternational Journal of Heat and Mass Transfer
Volume46
Issue number15
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed

Fingerprint

fluid flow
beds
Flow of fluids
Waste heat utilization
heat
Fluids
Temperature distribution
fluids
temperature distribution
recovery
Damping
dampers
damping
Hot Temperature
oscillations
products
Temperature
temperature

Keywords

  • heat transfer
  • heat exchangers
  • fixed bed combustion
  • fixed beds
  • batch heating

Cite this

Saastamoinen, Jaakko. / Heat exchange between two coupled fixed beds by fluid flow. In: International Journal of Heat and Mass Transfer. 2003 ; Vol. 46, No. 15. pp. 2727-2735.
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Heat exchange between two coupled fixed beds by fluid flow. / Saastamoinen, Jaakko (Corresponding Author).

In: International Journal of Heat and Mass Transfer, Vol. 46, No. 15, 2003, p. 2727-2735.

Research output: Contribution to journalArticleScientificpeer-review

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AB - Heat exchange by forced fluid flow between two coupled fixed beds containing solids can be used to recover heat from hot products to cool input in many industrial processes. The heat exchange between the fixed beds is studied. Analytical solutions for the transient fluid and solid temperature distributions and heat recovery effectiveness are derived. The intra-particle transient temperature distributions are accounted for in the more accurate analysis and the results are compared to lumped analysis. It is shown that the heat recovery effectiveness reaches maximum at certain optimum time instant at which the fluid circulation should be stopped. Damping of cyclic oscillations in fluid temperature or concentration is considered and analytical solution for the damper is presented.

KW - heat transfer

KW - heat exchangers

KW - fixed bed combustion

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KW - batch heating

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