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Title: Improved simulation of phase change processes in applications where conduction is the dominant heat transfer mode
Authors: Gowreesunker, BL
Tassou, SA
Kolokotroni, M
Keywords: Phase change materials (PCM);Heat source/sink;Temperature hysteresis
Issue Date: 2012
Publisher: Elsevier
Citation: Energy and Buildings, 47: 353 - 359, Apr 2012
Abstract: This paper reports on the development, experimental validation and application of a semi-empirical model for the simulation of the phase change process in phase change materials (PCM). PCMs are now increasingly being used in various building materials such as plasterboard, concrete or panels to improve thermal control in buildings and accurate modelling of their behaviour is important to effectively capture the effects of storage on indoor thermal conditions. Unlike many commercial simulation packages that assume very similar melting and freezing behaviour for the PCM and no hysteresis, the methodology employed treats the melting and freezing processes separately and this allows the inclusion of the effect of hysteresis in the modelling. As demonstrated by the results in this paper, this approach provides a more accurate prediction of the temperature and heat flow in the material, which is of particular importance in providing accurate representation of indoor thermal conditions during thermal cycling. The difference in the prediction accuracy of the two methods is a function of the properties of the PCM. The smaller the hysteresis of the PCM, the lower will be the prediction error of the conventional approach, and solution time will become the determining factor in selecting the simulation approach in practical applications.
Description: This is the post-print of the Article. The official published version can be accessed from the link below - Copyright @ 2012 Elsevier
ISSN: 0378-7788
Appears in Collections:Publications
Mechanical and Aerospace Engineering
Dept of Mechanical Aerospace and Civil Engineering Research Papers

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