Abstract
The thermophysical parameters of inorganic phase change material (PCM) of CaCl2.6H2O added by 1%wt BaSO4 as the nucleating agenthas been studied by analyzing the temperature vs time data during liquid-solid phase transition (solidification process) based on the original T-history method and its modification form. The PCM sample and water as reference material are placed in a cylindrical tube with chosen dimensions to fulfill the criterion that the Biot number Bi is less than 0.1. To extract the values of mean specific heat capacities of solid and liquid PCM and the heat of fusion related to liquid-solid phase change, hot liquid PCM in the tube with temperature above its melting point was suddenly exposed to a cool atmosphere to allow the gradual solidification process. We comparedthe results with reference data, both from direct measurements of Differential Scanning Calorimetry(DSC) andindirect measurement of the same method.
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