Energy‐Efficient Heat Storage using Gypsum Board with Fatty Acid Ester as Layered Phase Change Material. Issue 8 (20th March 2017) - Wi, Seunghwan
Abstract: The thermal performance of phase change materials (PCMs) for energy savings is important in various fields. Fatty acid waxes are types of organic fatty acid ester PCMs made from under‐used and renewable feedstocks. However, they possess one major drawback, namely their phase instability in the liquid state. Therefore, to improve stability during phase transitions, a new method of leakage prevention was developed to form the layer. The thermal properties of the layered PCM gypsum boards were analyzed by differential scanning calorimetry (DSC), phase change, enthalpy, and leakage tests. Finally, a dynamic heat transfer analysis of the layered PCM gypsum board was performed for the evaluation of the peak temperature reduction time lag effects of the prepared specimen. The latent heats of palm wax (PW) and beeswax (BW) were 178.1 and 173.6 J g −1 during heating, 159.7 and 140.9 J g −1, during freezing, respectively. Furthermore, the peak temperatures of the three wax‐infused layered PCM gypsum board samples were reduced by 4.6, 6.6 and 0.9 °C, respectively, compared with reference gypsum board. Abstract : Band of gypsum : The thermal properties of gypsum‐board layered phase change materials (LCPM) are analyzed by differential scanning calorimetry (DSC), phase change analysis, enthalpy analysis, and leakage tests. A dynamic heat transfer analysis of the LPCM gypsum board is also performed. The LPCM gypsum boards exhibit high heat storage, peak temperature shifting, and time lag effects for maintaining thermal inertia.