There are three types of glass that are generally used in glass greenhouses. Insulating glass, float glass, tempered glass. In the past, ordinary glass used in the construction of glass greenhouses was generally float glass, usually 4mm and 5mm thick. At that time, 3mm and 4mm thick glass were commonly used in Europe and the United States. Only 5mm thick glass was used in hail-prone areas. In my country, because 5mm thick glass meets the requirements of the civil construction market, it has been used as a common specification for glass greenhouse covering. With the gradual increase of imported greenhouses and the increasing investment of foreign glass greenhouse manufacturers in China, 4mm thick glass is gradually being used in my country’s glass greenhouses. The most commonly used glass is tempered glass, which is tempered on the basis of float glass and is stronger. Generally, the top of the better glass greenhouse is 5mm tempered glass, and the surrounding is 5+6+5 hollow glass. The glass has good anti-condensation properties. Because there is a desiccant that can absorb water molecules inside the hollow glass, the gas is dry. When the temperature is reduced, the inside of the hollow glass will not produce condensation. The dew point on the outer surface of the glass will also increase. For example, when the outdoor wind speed is 5m/s, the indoor temperature is 20°C, and the relative humidity is 60%, 5mm glass starts to condense when the outdoor temperature is 8°C, while 16mm (5+6+5) insulating glass under the same conditions, Condensation occurs when the outdoor temperature is -2°C. For example, the top of the eco-restaurant greenhouse is a selected sun panel, surrounded by hollow glass.
Post time: Aug-28-2021