Kuzhel L. Regularities of heat transfer through window constructions

The dissertation is devoted to theoretical and experimental research processes of aerodynamics and heat transfer through window constructions. The heat-engineering features of heat transfer through window constructions have been theoretically researched. The existing thermophysical model of calculation of heat transfer through the double-glazed unit with ordinary double-glazed windows has been improved by applying it in a non-standard setting with one and two low-emission coatings, applied to the glass surface. Experimental studies of heat transfer through single-and double-chamber glass units with different distance between glasses and low-emission coatings deposited on them have been conducted. Experimental studies of heat transfer through window profiles have been conducted to. The verification of calculation model has been verified by experimental data. As a result, the proportion of radiation and convective heat transfer through the double-glazed unit have been determined and the type of double-glazed window and window profile have been determined too, which is optimal for installation in the window sill. Using a CFD-package, a computer simulation of radiation-convective heat exchange of a two-chamber double-glazed window was carried out in three-dimensional formulation. An engineering methodology for calculation of heat loss through window designs is developed, which allows to take into account the influence of the radiation component of solar radiation on the heat transfer through a window-paneled window. In the non-stationary formulation a thermophysical model of heat transfer for a ventilated double-glazed double-glazed window is developed.