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Abstract

A technique of vacuum deposition is described for producing heat reflecting films onto sheet plastic for application in domestic windows. Thin metal films of copper, silver, gold and titanium nitride sandwiched between dielectric films and electrically conducting oxide coatings of indium, indium doped with tin and cadmium/tin are shown to have the properties required for a heat reflecting coating for visible windows. Durability measurements suggest that conducting oxide films have more promise. Indium oxide coatings on polyester sheet have been made which have been produced onto plastic transferred from roll-to-roll at a rate of 0.25 m.min**-1. They are highly transparent and have a low temperature emissivity of about 0.2. It is shown that their use as a secondary window can improve the performance of the system to give a U-value of less than 2 Wm -20-C**11 and this can be done with a small weight penalty and, what is most important, can be projected to be able to be manufactured at a cost which makes the unit a very efficient use of energy resources. It should have a payback period of considerably less than one year, both in cost and in energy saved, and have the potential to be made in large areas to make a significant impact on natural energy use.

Additional information

Authors: HOWSON R P DEPARTMENT OF PHYSICS, UNIVERSITY OF TECHNOLOGY, LOUGHBOROUGH (UK), DEPARTMENT OF PHYSICS, UNIVERSITY OF TECHNOLOGY, LOUGHBOROUGH (UK)
Bibliographic Reference: EUR 9139 EN (1984) MF, 91 P., BFR 120, BLOW-UP COPY BFR 455, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989122082000 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en