Effect of water-ice phase change on thermal performance of building materials

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F16%3A00300233" target="_blank" >RIV/68407700:21110/16:00300233 - isvavai.cz</a>
Result on the web
<a href="http://scitation.aip.org/content/aip/proceeding/aipcp/10.1063/1.4955244" target="_blank" >http://scitation.aip.org/content/aip/proceeding/aipcp/10.1063/1.4955244</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.4955244" target="_blank" >10.1063/1.4955244</a>

Result language
angličtina
Original language name
Effect of water-ice phase change on thermal performance of building materials
Original language description
The effect of water ice-phase change on thermal performance of integrated building material is investigated in this paper. As a characteristic construction, simple external wall made of aerated autoclaved concrete was assumed which was exposed to dynamic climatic condition of Šerák, Czech Republic. The computational modelling of hygrothermal performance was carried out using computer codes HEMOT and SIFEL that work on the basis of finite element method. The effect of phase change was taken into account by fixed-domain method, when experimentally determined effective specific heat capacity was used as a material parameter. It comprises also the effect of heat consumption and heat release that accompany the water-ice phase change. Comparing to the results with specific heat capacity, the effect of phase change on thermal performance could be quantified. The results showed that temperature fields can differ more than 6 °C. Additionally, the amount energy transported through the wall may be higher up to 4 %. This confirmed, that the effect water-ice phase change should be included in all the relevant energy calculations.
Czech name
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Czech description
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Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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