The utilization rate of potential heat accumulation capabilities using latent heat of phase-change materials

Abstract

The aim of the study is to gain information on the actual effects of PCM labor in building partitions. The tested materials were plasterboards containing microcapsules of PCM. Two types of boards with various thermal characteristics of the contained PCM phase change and a simple plasterboard without PCM were tested. The results presented in this paper are one of the few stages of broader research on various PCM materials and different ways of their application. The lightweight wall of timber frame with high thermal insulation was subjected to set of test. The research was conducted in a complex of environmental chambers which allows provide different temperature curve of the chamber possible for real climatic conditions. The temperature and the density of heat flux were the values measured both on the surface and between wall layers. The results of measurements can also serve as a basis to determine the actual thermal characteristics of a partition wall with PCM layers, which can be helpful in creating a design tool to select an appropriate amount of PCM in relation to the thermal load of the building.

Effects of Neglecting PCM Hysteresis While Making Simulation Calculations of a Building Located in Polish Climatic Conditions

“…Knauf Comfortboard Properties: board thickness 12.5 mm, board weight 11 kg/m 2 , latent heat capacity 200 kJ/m 2 , specific heat capacity 13 kJ/m 2 K, phase change temperature 23 • C. The course of the curve (Figure 2) of Temperature Dependence of Enthalpy was adopted based on the results of calorimetric tests and the literature [35]. On the other hand, for a plasterboard containing 30% phase-change material in the form of microcapsules, the curve shown in Figure 3 was determined on the basis of the results of calorimetric tests performed separately for pure PCM and the plasterboard matrix and then calibrated [36]. Due to the expected high degree of overheating of the interior of the building, the use of two layers of boards containing phase-change material was assumed.…”