Passive cooling performance of a test room equipped with normal and new designed Trombe walls: A numerical approach

This paper is dedicated to numerically appraise the passive cooling performance of the new designed and normal Trombe walls combined with solar chimney and water spraying system (WSS) in a test room under Yazd (Iran) desert climate. The new designed Trombe wall expands the indoor space and decreases the implementation cost of the Trombe wall. Furthermore, it can receive the solar intensity from three directions while the normal Trombe wall can only receive it from one direction. The numerical simulation of the new designed Trombe wall was validated by the previous experimental study. The present numerical results indicate that in the morning the average room temperature in the new designed Trombe wall is lower than the normal type since the new designed Trombe wall generates higher natural air ventilation compared with the normal type. But, in the late hour of the day due to the more expansive area of normal Trombe wall and its higher capability to store the solar thermal energy, the average room temperature decreases to a greater extent in the normal type. Moreover, the cooling efficiency analysis demonstrates that the daily average cooling efficiency of the new designed Trombe wall surpasses the normal type by around 8.63%.