Annual Thermal Performance of the Trombe Wall with Phase Change Heat Storage under Climate Conditions of Uzbekistan
K. A. Samiev, Akbar Halimov
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.