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Dynamic Heat Transfer and Thermal Performance Evaluation of PCM

C-Therm TCi Thermal Conductivity Analyzer is applied in the characterization of the thermal conductivity of the samples in the article. The thermal performance of hybrid hollow plaster panels (HHPPs) were analyzed using the phase change material (PCM) injection amount as a variable according to the hollow size. This study focuses on the n-octadecane, an organic PCM, was used for storing latent heat during the phase change range and to improve thermal transmittance using exfoliated graphite nanoplatelets (xGnPs), which have high thermal conductivity. When xGnP was applied to n-octadecane, the thermal conductivity was improved by 225% and it was confirmed that thermal storage or release of the phase change material was actively react. The thermo-physical properties of the xGnP and n-octadecane composites were analyzed using a thermal conductivity analyzer (TCi) and differential scanning calorimetry (DSC). The thermal stability of PCM over a long period of analyzed through after 10000 times thermal cycling. The thermal performance of the PCM/plaster composite panel using the dynamic heat transfer device were performed. The peak temperature through the HHPPs was significantly reduced of 3.8 ℃at internal room, and the time-lag effect was confirmed of 1.56 hour. The result showed that up to 36.6 J/m2 of thermal energy was stored in the 26-Px/O, corresponding to approximately 247% of the available thermal energy of the reference panel.

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