engleski

Windows with Heat Mirrors for Energy Conservation

detailed calculations have shown that radiation heat losses trough double-pane windows can be substantially reduced by the application of a thin, transparent film, reflective to long-wave radiation ("heat mirror"). The comparative analysis of different types of "heath mirrors" has been carried out, and a tin oxide layer deposited by spray has been recognized as the most suitable for large-scale production. A tin oxide film has been deposited on glass by spray method using ordinary commercial materials for the substrate, the solvent and solution. The optical properties of tin oxide films obained have been compared with those measured on films deposited by more sophisticated methods ; results are as folows: in comparison with vacuum-deposited metallic films or vacuum-deposited SnOx films, our sprayed SnOx films have similar or better transmitivity for visible specra and somewhat (10-30 per cent) lower reflectivity for the infrared portion of the spectrum, but at the same time the prices of material and/or production costs are several orders of magnitude lower.

energy conservation; reduction of heat losses; sprayed SnOx film

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