An Experimental Investigation of a Novel Trombe Wall with Venetian Blind Structure

Abstract

A novel Trombe wall facade with DC fan integrated on the venetian blind structure is presented in this paper. To study the thermal performance of it, a series of comparative experiments have been conducted in winter and summer respectively in Hefei.In winter the experiment has been carried out (close assisted DC fan) at the varying of the slat angles (θ=0°, 45°, 90°) between the comparable two rooms, the results show that according to the measured weather data the value of normalized temperature rise is larger when the blind slat angle is set at 45°, which means the optimal effect of heat accumulation. In summer, to minimize the effect of undesired heat gains and enhance air vent velocity, the system focuses the blind slat angle at 90°(with reference to horizontal) and opens the assisted fan,then comparisons are made among the air temperature of the two rooms at 22 °C,24 °C and 26 °C and it indicates that the average temperature difference of the south wall between the two rooms is 1.95 °C,1.72 °C, 1.71 °C respectively and the maximum heat gain difference is reach up to 3.66×103KJ within 8 hours(8:00-16:00). The results reveal that a promising technicof trombe wall structure integrated venetian-type collector and it could operate high efficiently.