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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/10854

Title: A tale of two cities: An analysis of the thermal performance of glazed office buildings in Ghana.
Authors: Simons, B
Ayarkwa, J
Koranteng, C
Keywords: Simulation
Cooling loads
Orientation
Glazing
Thermal performance
Issue Date: 12-Apr-2017
Publisher: ICIDA
Citation: ICIDA, 6th International Conference on infrastructure development in Africa
Abstract: Best buildings are not only exemplars of form, grace, building technology and aesthetics; they also help in the development of the organizations that use them. A well-briefed and well-designed office building therefore goes a long way into boosting the productivity of the occupying organisation. Heavily glazed office buildings have become the order of the day in recent time. The use of energy in these glazed buildings to create comfort in the indoor has a tremendous effect on the energy consumed. The paper comparatively analyses two glazed office buildings in the Ghanaian cities of Accra and Kumasi through simulation. The two buildings (ROY and H.T) were compared based on their base case cooling loads and then the improvement scenarios. The results indicated that whilst building ROY in Kumasi recorded a total simulated cooling load of 126.20 KWh.m-2.a-1, H. T in Accra was 235.16 KWh.m-2.a-1, a value almost twice as much as that of ROY. The huge difference could be due to factors such as the orientation, the number of people within the offices, the lighting systems in use etc. With efficient lighting, glazing, thermal mass, night ventilation and facade insulation, ROY had its cooling loads significantly reduced to 89.7 KWh.m-2.a-1 representing 29%. In Accra, the same parameters applied to H.T led to a 34% reduction of the initial annual cooling load. This showed that H.T primarily uses much more energy than the ROY but in trying to improve it, the former responded better to the parameters than the later. It is recommended for designers to treat such localized climate as a different entity and provide designs to suit it whiles ensuring low energy use for thermal comfort.
Description: In the proceedings of the 6th International Conference on Infrastructure Development in Africa, 12th April, 2017, KNUST, Ghana.
URI: http://hdl.handle.net/123456789/10854
Appears in Collections:College of Architecture and Planning

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