Thermally Stable Phase Change Material with High Latent Heat and Low Cost based on an Adipic Acid/Boric Acid Binary Eutectic System

摘要

An adipic acid/boric acid (AA-BA) binary eutectic mixture containing 80 wt adipic acid and 20 wt boric acid was investigated as a new phase change material (PCM) with high latent heat, high thermal stability, and low cost. The materials thermophysical properties and thermal stability were studied using differential scanning calorimetry (DSC), X-Ray Diffraction (XRD), and thermogravimetric analysis (TGA). The thermal stability was investigated insitu over 100cycles using DSC. The phase change temperature of the AA-BA binary eutectic mixture was 135.04 degrees C and the latent heats of the melting and crystallization process were 283.42 and 272.16Jg(-1), respectively. The latent heat of melting only dropped 4.94 after insitu 100cycles using DSC. Following comparison of thermal properties and price of the AA-BA eutectic mixture PCM with those of some composite PCMs, the results indicate that the newly prepared AA-BA eutectic mixture is a potential phase change material for thermal storage tanks.