Percentage absorbance and transmittance of various types of glasses

Abstract

Studies have been made on the Percentage Absorbance and Transmittance of various types of glasses in the Ultra-Violet (UV) and Visible (Vis.) Spectrum (between the wavelength range of 200nm and 800nm). The 6mm thick plain louvre glass absorbed more than other plain louvre glasses with smaller thickness. The same results were obtained for coloured glasses. The coloured glasses absorb less in their respective colour range and hence transmit more in such range. Hence, it is recommended that thick coloured and 6mm plain louvre glasses should be used to reduce the load on the air-conditioners inside buildings, while plain louvre glass of smaller thickness be used as glazing material in flat plate solar collectors and possibly in long term storage elements.


KEY WORDS: Absorbance, Transmittance, Glass.


Global Jnl Pure & Applied Sciences Vol.10(2) 2004: 327-334