Experimental Research on Heat Flux for Integration of Flat Solar Collectors and Roofs

Three roof types including single roof without solar collector and two types of integration of flat solar collectors and roof are considered and researched by experimental testing during daytime and nighttime. Through analysis of data from experimental testing, the following conclusions are obtained: (1) During summer daytime, heat flow into the building through the integration of flat solar collector and roof is significantly reduced compared to the roof without collector. The heat gain of sealed type of integration is lower than the none-sealed type of integration. (2) During winter night, heat flow out of the building through the integration of flat solar collector and roof is significantly reduced compared to the roof without collector. The heat loss of sealed type of integration is lower than the none-sealed type of integration. (3) Integration of roof and flat solar collector can reduce the heat gain in summer daytime and heat loss in winter nighttime, the sealed type of integration is better than none-sealed type of integration whether in summer daytime or winter night.