The types of glass that make up the hollow include white glass, heat-absorbing glass, sunlight-controlled coating, low-e glass, etc., as well as the deeply processed products produced by these glasses.The optical thermal characteristics of glass will be slightly changed after hot bending and toughening, but it will not cause obvious changes to the hollow system. Therefore, only the raw glass without further processing is analyzed here.Different types of glass, in the use of a single piece of energy saving characteristics have a great difference, when the synthesis of hollow, various forms of combination will also show a different change characteristics.
Heat-absorbing glass is to reduce the transmission rate of solar heat through body coloring and increase the absorption rate. Because the air flow speed on the surface of outdoor glass will be greater than that of indoor glass, it can take away more heat of the glass itself, thus reducing the degree of solar radiation heat entering the room.Different color types, different shades of endothermic glass, glass SHGC value and visible light transmittance will have a great change.But various color series of endothermic glass, the extent of its radiant heat into the room.Different color types, different shades of endothermic glass, glass SHGC value and visible light transmittance will have a great change in the morning.However, the radiation of endothermic glass of various color series is the same as that of ordinary white glass of beta-fish, about 0.84.Therefore, in the case of the same thickness, the heat transfer coefficient of insulating glass is the same.Several representative 6mm thick endothermic glass made by different manufacturers were selected, and the hollow combination mode was "endothermic glass +12mm air +6mm white glass". The calculation results showed that the endothermic glass could only control the heat transfer of solar radiation, but could not change the heat transfer caused by the temperature difference.
Sunlight control coated glass is coated on the surface of the glass with a layer of metal or metal compound film, film not only makes the glass presents rich color, but also the more important role is to reduce the solar heat gain coefficient SHGC value of the glass, control solar radiation directly into the room.Different types of film can make the glass SHGC value and visible light transmittance have great changes, but there is no obvious reflection effect on the far infrared thermal radiation, so the sun control coated glass single or hollow use, K value is close to the white glass.
Post time: Apr-15-2021