Thermal Deformation of Window for Climatic Conditions of Russia

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During the last decades in Russia new designs of window found wide application. As a rule, modern designs of window are made of combinations of materials with different thermal characteristics. Most of them are designed for European climatic conditions. Operation in climatic conditions of Russia can lead to essential thermal deformations of elements of a design of window. It is necessary to consider that thermal deformations of various elements of window (a frame, a shutter, an impost) can lead to change of the main operational parameters of a design. Current regulations this parameter is not currently normalized. The authors conducted a large volume of experimental studies of window blocks made of PVC, aluminum alloys and other materials in order to assess the impact of thermal deformation on the characteristics of window blocks. On the basis of the conducted studies revealed a significant influence of thermal deformation of structures on thermal performance, the minimum temperature on the inner surface, the change of air permeability through the window unit, reducing the insulation of window units. Thus, the revealed physical process directly influences maintenance of comfort, an internal microclimate, costs of heating, ventilation and conditioning of buildings. Taking into account the diversity of climatic regions of Russia, there is a need for a comprehensive assessment of the main performance characteristics of window units, the development of measures to reduce the impact of thermal deformation on the performance of window units and the selection of optimal technical solutions for a given region of construction.