Evaluation of thermal performance and suitability of heat-strengthened storage exterior materials featuring hexagonal boron nitride for building applications

초록

Phase change materials (PCM) are used in various fields like automobiles, refrigeration, power, and construction, where they help reduce energy consumption and enhance occupant comfort, particularly in applications like HVAC, windows, aggregates, and exterior materials. PCM-based exterior materials are effective thermal storage materials that absorb the heat of the building exterior wall received from the sun throughout the day and discharge it during the nighttime. Hexagonal boron nitride (h-BN) is a white powder with excellent thermal conductivity, heat resistance, and electrical insulation, commonly used as an electrical insulator in various heat-resistant molding materials. In this study, a heat-strengthening heat storage paint with improved thermal conductivity was prepared by mixing h-BN with microencapsulated phase change materials (MPCMs). Overall, the paint mixed with h-BN and MPCM contained well-dispersed particles. DSC analysis showed that latent heat performance improved as PCM content increased (61.02 %, 50.22 %). TGA analysis showed that M20 + BN10 retained 57.89 % byproducts at 600 degrees C, confirming its excellent thermal durability. Additionally, mixing with BN increased the thermal conductivity by 11.1 %. The dynamic thermal performance of heat storage paint was assessed through the application of a data logger and thermal imaging, confirming the latent heat absorption and release of MPCM.

키워드