Sustainable House for Botswana

C. Ketlogetswe and J.K. Fiszdon (Botswana)


Energy efficiency measures in building


Botswana’s weather conditions are characterised by high insolation, with an average of 320 clear, sunny days per year. Such weather conditions considerably increase the costs of keeping building at comfortable conditions particularly due to the high cooling loads. Despite all these high solar energy, its use to produce electricity is minimal. However it appears that designing of buildings particularly residential homes do not take weather conditions into considerations. This paper investigates effect of building construction on the cooling loads profiles for several different wall constructions including one prevalently used for single family housing. Analysis clearly indicates advantages of modern construction with embedded insulation. Installation of both, thermal – to heat water and photovoltaic solar collectors allow the housing to be sustainable.

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