ENVIRONMENTAL ASSESSMENT OF SOLAR HEAT SHADING OF A BUILDING EQUIPPED WITH EXTERIOR SCREENS COATED WITH PHOTOCATALYSTS(Environmental Engineering)

Abstract

The authors have surveyed a building equipped with exterior screens coated with photocatalysts and conducted theoretical calculation. The survey has found that sol-air temperature was extremely low when water was sprinkled over the screens and the temperature was higher when screens were installed but no water was sprinkled, and the sol-air temperature became the highest when no screen was provided. This shows that exterior screens using photocatalysts are very effective in solar heat shading. It is also found that air layers were spontaneously ventilated about 32 times an hour. Theoretical values of screen surface and room temperature are very close to the surveyed ones.