The temperature control effect of modified water hyacinth carbon based phase change materials in louvers

Abstract

Composite phase change material was filled into louvers, which could solve the energy consumption issues caused by the use of ordinary glass windows and traditional louvers in buildings. In this work, modified water hyacinth carbon based composite phase change material was prepared by freeze drying and high temperature pyrolysis methods, the effective load rate, relative enthalpy efficiency, and energy storage efficiency are 65.56 %, 81.95 %, and 99.1 %, respectively. It was filled into hollow louvers and a phase change louver model was constructed, which was applied in glass windows for measurement. The phase change louver stored a lot of heat while blocking heat. When the illumination distance is 15 cm and 30 cm, the peak temperature of the center of the louver was 25.219 °C and 28.918 °C. Compared with the traditional shutter model, the temperature is decreased by 1.914 °C and 1.810 °C respectively, indicating it has a synergistic effect of shading and energy storage temperature control, and phase change louver has the effect of delaying temperature rise and fall, which can reduce temperature fluctuations and improve the thermal comfort of the environment. Therefore, biomass carbon based phase change energy storage materials are expected to be sustainably utilized in the field of building energy conservation.