Heating and ventilation efficiencies of a solar chimney integrated system in a low-energy office building

Summary

Using CFD, the authors model a rooftop solar chimney linked to an air duct, whose openings can be rearranged to switch between warming and cooling, on a small Iranian office block. It works for daytime pre-warming and trims yearly heating needs by roughly a third, though comfort requires sunshine above 550 W/m² and outdoor air above 10 °C.

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