In this paper, a sensitivity analysis of input material parameters of computational model for description ice forming process in the porous building materials is presented. The analysis is primarily aimed at investigation of uncertainty in moisture transport modelling, as the amount of liquid water can significantly effect the ice formation process. Since the model uses smooth effective specific heat capacity feature for simulation of latent heat consumption or releasing during the phase change, the sensitivity analysis is focusing on this part of the model. The results showed, that uncertainty in moisture content may significantly affect the temperature distribution in the building materials during the year.
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