Thermodynamic analysis of latent heat storage in a shell-and-tube heat exchanger

Ch Charach, A. Zemel

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

This work addresses the entropy generation aspects of a latent heat storage in which the energy delivered by a hot gas flowing through a cylindrical tube induces melting of the material surrounding the tube. The heat transfer for conduction-dominated melting is analyzed, taking into account the two-dimensional effects. The storage process irreversibilities associated with both the gas flow and the heat transfer (including entropy generation in the melted layer) are considered. The number of entropy generation units, which is a measure of the thermodynamic imperfection of the energy storage process, is expressed as a function of the main design parameters of the system. Analytic bounds and simplified asymptotic expressions for this quantity are derived. The results are compared with earlier one-dimensional studies.

Original languageEnglish
Pages (from-to)93-99
Number of pages7
JournalJournal of Solar Energy Engineering, Transactions of the ASME
Volume114
Issue number2
DOIs
StatePublished - 1 Jan 1992

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