Influence of thermal properties of architectural glass on energy efficiency of sustainable buildings
2017
Gusta, S., Latvia Univ. of Agriculture, Jelgava (Latvia) | Strausa, S., Latvia Univ. of Agriculture, Jelgava (Latvia) | Gross, U., Latvia Univ. of Agriculture, Jelgava (Latvia)
In order to increase energy efficiency in buildings, reduce CO2 emissions in the world and prevent global warming, it is very important to pay attention to the thermal properties of skylights. The impact of glazing on the thermal performance of a building is complicated. There are several aspects that need to be considered : the climatic conditions of the location, such as temperature, humidity, sunshine, and wind, as well as the orientation, form and layout of the building, the building materials, especially their mass and insulating properties, the size and location of windows and shading and the thermal properties of glazing systems. The impact of glazing is the result of the interaction of all of these aspects. The aim of this study is to provide some insight in to how thermal properties, in particular vertical heat flow, are affected by the thickness of the air separation layer in horizontal and sloped skylights. Glass structures made from organic glass and aerogel layers, which are characterised by a low thermal conductivity coefficient, were studied. An experiment was carried out with different translucent materials (selective glass, organic glass, aerogel filling) and the distance between the glazing layers was varied. The aim was to measure the dependence of the thermal conductivity coefficient on the thickness of the air separation layer and the direction of the heat flow.
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