Vacuum glazed units - energy efficient glazing

The article summarizes the prerequisites for the improvement of translucent structures in terms of energy conservation. It is noted that there is a high potential of application of vacuum glazed units. On the basis of EN 673 and the application of numerical methods, a research was made to calculate the theoretical thermal resistance on the pillars and between them, and a thermal resistance of a central part of a vacuum glazed unit taking into account a heterogeneity. To compare with theoretical values, experimental laboratory examinations on a model vacuum glazed unit and a conventional single-chamber glazed unit were conducted using methods of GOST 26602.1-99. The data obtained from measuring sensors of temperature and thermal flux was processed using thermal imaging. The areas of pillars influence and the given resistance of the central part of the vacuum glazed unit were calculated. The results obtained from practical and theoretical studies showed high convergence. The accuracy of the experiment is confirmed by taking simultaneous measurements of the vacuum, and the conventional single-chamber glazed unit. It should be noted that confirmed high thermal qualities of vacuum glazed units can be compared with the required heat conductance values of Moscow for non-translucent wall constructions. A brief economic analysis is done to determine the practicability of application of vacuum glazed units.