Research on Environmental Performance and Energy Saving Performance of Double LayerTrombe Wall in Winter in China's Severe Cold Region

Abstract

This study presents a double mezzanine Trombe wall that integrates light and heat, designed specifically to fulfill the thermal insulation requirements in regions experiencing hot summers and cold winters. This wall structure incorporates solar collectors, reflective heat radiation layers, and indoor radiant panels. Both simulation and experimental analyses were conducted to evaluate the thermal insulation effectiveness of the wall under various operational conditions. The findings from the simulations and experiments indicate that, under solar radiation, the temperature of the collector plate in no-load conditions increases, significantly influencing the heat transfer properties of the wall. During winter no-load condition tests, the collector plate achieved maximum temperatures of 89.1℃ and 92.0℃ in the respective simulation and experimental settings. The collector plate's temperature exceeds both indoor and outdoor ambient temperatures, enhancing its capability to maintain indoor warmth during winter. This method of indoor heating contributes to an improved environment while simultaneously lowering carbon emissions throughout the heating season in colder northern areas, thereby promoting environmental sustainability. Additionally, each material layer of the wall exhibits a vertical temperature gradient, which becomes more pronounced with increased solar radiation intensity, yet diminishes as the thickness of the air interlayer increases.