Evaluation of the thermal performance of the geometry of the domed roof

Abstract

Domed roofs were used for mulching roofs of buildings in Iraq and other countries for them adequate thermal performance. This study aims to evaluate to determine the thermal performance the most suitable roof configuration, reduce indoor air temperature and be useful through hot seasons, taking into account all factors such as radiative heat transfer, solar radiation, wind moving around as well as openings in the dome. Field measurements and research on the performance of the domes were carried out in the city of Baghdad using a computer energy simulation program (Ecotect). Results showed that the thermal performance of a domed building examined is better than that of a flat-roofed building and keeps indoor air relatively cool during the summer. Domed formation has a clear effect on the quantity of received and absorbed solar radiation and the intensity of wind movement around the dome, as well as the negative air flow inside the building. It's good for human comfort.