Nanometer yellow tungsten oxide may be applied for manufacturing window heat insulation film. How many types of energy-saving glass are there? The commonly used heat-insulating glass is divided into three categories, namely coated glass, heat absorbing glass and insulating glass. The heat insulating glass coated with yellow tungsten oxide belongs to the coated glass, which can block ultraviolet and near-infrared rays in sunlight. Such thermal insulation glass has high visible light transmittance. In other words, it has excellent heat insulation effect without affecting daylighting.
Why not use heat absorbing glass? Heat-absorbing glass blocks some of the solar radiant heat in summer or winter, so it can be used in part of the southern area, but it is not suitable to be used in the north. The heat absorbing glass is actually the absorption of radiation, and the heat absorbed by the glass will eventually be transmitted indoors and outdoors. Such glass has no selectivity to the spectrum, which reduces the transmittance of sunlight and hinders the projection of visible light, which will affect the daylighting.
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