Annual Thermal Performance of the Trombe Wall with Phase Change Heat Storage under Climate Conditions of Uzbekistan
Abstract
Abstract—In this study, we have assessed the potential of a passive solar heating system with a Trombe wall integrated with phase change materials (PCMs) under climate conditions of Uzbekistan. The proposed mathematical model of unsteady-state heat transfer of a building with the Trombe wall integrated with PCMs has been verified by experimental data. The annual thermal performance and potential of the passive solar heating system with the PCM-based Trombe wall were assessed based on analysis of three-room residential buildings: a typical building; a building with the Trombe wall; and a building with the Trombe wall integrated with PCM-based heat storage. The results show that the specific annual thermal load for heating a typical three-room building, building with the Trombe wall, and building with the Trombe wall integrated with PCM-based heat storage is 211, 134.3, and 91.8 kWh/m2 year, respectively. It has been revealed that the integration of the Trombe wall system alone in a building will result in a 36% reduction in the annual thermal load for heating the building in winter, while the use of the Trombe wall system with PCM-based heat storage reduces this value to 56.6%. Therefore, the simple payback period for the passive solar heating system with the Trombe wall with PCM-based heat storage is 12.9 years and annual reduction in CO2 emissions is 70 kg/m2.