Abstract
An analysis was developed for the calculation of the total infrared transmittance of polymer films, based on existing spectral transmittance measurements of fixed thickness polymer samples. Although the analysis can be equally applied for any specific material, it was employed for the calculation of the total infrared transmittance of Tedlar films for the wavelength band between 2.5 to 42.5 μm and for a broad range of radiant source temperatures between –20 and 500°C. The derived results were found to be in reasonable agreement with earlier data derived for a narrow range of radiant source temperatures. The use of polymer films appears to be very promising in various fields of technology and construction, more specifically in solar energy for the design of simple low-cost solar collector fields and individual collectors, in horticulture, architecture, and radioactive cooling design in which radioactive properties and more specifically their infrared transmission is necessary.
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