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Evaluation of the Impact of Window Shading on the Anti-Insulation Phenomenon in Building Energy Use

Published online by Cambridge University Press:  02 May 2018

R. K. Rabasoma
Affiliation:
University of Botswana, Gaborone, Botswana, Email: [email protected]
D. D. Serame*
Affiliation:
University of Botswana, Gaborone, Botswana, Email: [email protected]
O.T. Masoso
Affiliation:
University of Botswana, Gaborone, Botswana, Email: [email protected]
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Abstract

Before 2008, it was common knowledge around the world that insulation always saved air conditioning energy in buildings. In 2008 a phenomenon called anti-insulation was brought to light by Masoso & Grobler. They demonstrated that there are instances when insulation materials in a building directly increase building energy use. Researchers around the world then echoed the message. Recent work by some of the authors investigated the anti-insulation phenomenon in summer and winter for both hot climatic regions (Botswana) and cold climatic regions (Canada). Their study concluded that there is still a mystery of exaggerated sources of heat inside the building aggravating the anti-insulation phenomenon. They hypothesized that incident solar radiation through the windows could be one of the causes. This paper therefore focuses on eliminating direct solar radiation through windows by applying external shadings on a previously anti-insulation building. The energy saved is evaluated and the possible reversal of anti-insulation studied. The study is useful to energy policy makers and the building industry as it showcases the existence of a possible silent killer (anti-insulation) and demonstrates that investing large sums of money on insulation in buildings may not be the most economic thing to do in building design decisions.

Keywords

Type
Articles
Copyright
Copyright © Materials Research Society 2018 

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References

REFERENCES

Melo, A.P., Sorgato, M.J., Lamberts, R.. (2013), Building energy performance assessment: Comparison between ASHRAE standard 90.1 and Brazilian regulation, (Elsevier Science Publishers), Vol. 70, pp. 372383.Google Scholar
Kaynakli, Omer. (2011), A review of the economical and optimum thermal insulation thickness for building applications, (Elsevier Science Publisher), Vol. 16, pp. 415425.Google Scholar
Masoso, O.T., Grobler, . (2008), A new and innovative look at anti-insulation behaviour in building energy consumption, (Energy and Buildings), pp. 18891894.Google Scholar
Kweche, G.. & Pule, B.N., (2017), An investigation of anti-insulation behaviour in building energy use. Presented as a final year Project, University of Botswana (unpublished)Google Scholar
Bond, Danielle E.M., (2014), Design and Analysis of Optimal Multi-layer Walls for Time Varying Thermal Excitation.Google Scholar
Bakera, N. M.W., Talebb, A. M., The Application of the Inclined Window Method for Passive Cooling in Buildings. (Architectural Science Review) Volume 45, Issue 1, 2002, pages 5155.CrossRefGoogle Scholar
Brennan, C.J, (2012), Analysis of Passive Louver Shading Technology and Impact on Interior Environment, Missouri University of Science and Technology.Google Scholar