Glass in hot climates


Current practices in the architectural design of office buildings have changed dramatically over the past three decades.  Nowadays, one of the most common and desirable features of such buildings is a large glazing area.  Such trends, coupled with stringent energy conservation measures and inappropriate glazing selections, may lead to the designing of buildings in which a comfortable inside condition cannot be maintained.  It is mainly for this reason that the concept of dual skin facades is gaining popularity in order to impose solar control and maximise the  utilisation of day lighting and the utilisation of more neutral glazing configurations with the advantage of increased comfort and productivity of the occupants.  Such facades can also include photovoltaic cells to enhance the energy efficiency of such buildings.  In principle, the concept sounds ideal for hot climates.  For this purpose, a typical governmental office building was considered for the analysis and was subjected to the climate conditions in Kuwait.  IGU with clear glass was used for the inner skin while for the outer skin, clear laminated glass with a spectrally selective film was used.  The addition of the clear laminated outer skin resulted in significant reductions in the amount of solar radiation entering the building,  This reduction had an impact on both the peak cooling load requirements and annual energy consumption.  Such application warrants the use of larger areas of standard clear IGU.

Primary author(s): Aasem E O

                            Kuwait,Institute for Scientific Research

Source: Asian Glass


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