Integrated solar collector storage system based on a salt-hydrate phase-change material

Y. Rabin, I. Bar-Niv, E. Korin, B. Mikic

Research output: Contribution to journalArticlepeer-review

109 Scopus citations

Abstract

A new integrated collector storage (ICS) concept for low-temperature solar heating of water is described. The solar energy is stored in a salt-hydrate phase-change material (PCM) held in the collector and is discharged to cold water flowing through a surface heat exchanger located in a layer of stationary heat transfer liquid (SHTL), floating over an immiscible layer of PCM. A theoretical model for the charging process of the proposed integrated collector is presented. The model assumes one-dimensional transient heat conduction in the PCM and SHTL layers and neglects the effect of convection heat transfer in these regions. The model was solved numerically by an enthalpy-based finite differences method and validated against experimental data. The results of parametric studies on the effect of the transition temperature and of the thickness layer of the salt-hydrate PCM on the thermal performance of the charging process are also presented.

Original languageEnglish
Pages (from-to)435-444
Number of pages10
JournalSolar Energy
Volume55
Issue number6
DOIs
StatePublished - 1 Jan 1995

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