Optimizing energy efficiency in HSCW buildings in China through temperature-controlled PCM Trombe wall system

This study investigates the use of PCM-TWS (phase change material Trombe wall) as a solution for improving energy efficiency in HSCW region buildings in China. The study found that the optimal parameters for PCM-TWS include a phase change temperature of 20–30° Celsius, a latent heat of 175–225 kJ/kg, and an air gap and indoor air exchange rate of 0.12 m³/s. The results indicate that the use of PCM-TWS can significantly reduce heat load and improve thermal comfort, with a 71.53% reduction in heat load during the heating season. The payback period for the PCM TWS investment ranges from 6.56 to 11.18 years, the investment in PCM TWS appears to be attractive and economically valuable. This study contributes to the current body of knowledge on the use of PCM TWS for improving energy efficiency in HSCW buildings in China.