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Requirements for glass greenhouse construction

Edit:Weifang Liwang Electric Co., Ltd.UpDate:2019-11-07

Requirements for glass greenhouse construction

With the rapid development of the greenhouse industry, the glass greenhouse has gradually become the goal pursued by people, mainly because of its architectural design advantages, so that it has a place in the market. At present, large-scale multi-span glass greenhouses have large single-room areas and design and construction levels. The characteristics of high and novel management methods have become one of the development trends of modern greenhouses, but its design, installation and construction standards are very different from other greenhouses. Today, let us understand the requirements of glass greenhouse construction.

As we all know, the higher the light transmittance of the glass greenhouse, the better the light and heat performance. The light transmittance of the greenhouse is affected by factors such as the light transmittance of the greenhouse covering material and the shadow ratio of the greenhouse skeleton. In addition, with the height of the sun in different seasons, different With the change of time, the light transmittance of the greenhouse also changes. The light transmittance of the ordinary glass greenhouse is 60-70%.

The thermal insulation index of the greenhouse covering layer and the overall thermal insulation index of the greenhouse are two indicators to measure the thermal insulation performance of the greenhouse. In general, the heat transfer coefficient of the single-layer greenhouse covering material is greater than 6. 2 w / (M 2 · K) [The heat transfer resistance is less than 0.1 6 (M 2 · K) / w] The heat transfer coefficient of the greenhouse covering layer can be reduced to 3 ~ 4. {{{8}} w / (M 2 · K) [The heat transfer resistance is 0. 2 1 ~ 0. { {6}} 3 (M 2 · K) / W] The overall thermal insulation performance of the greenhouse can be evaluated by the indoor and outdoor temperature differences that can be maintained without winter heating in the winter. In general, when the greenhouse is covered by a single layer, the indoor and outdoor temperature difference can be maintained at 2 ~ 5 ℃; by adding thermal insulation measures such as thermal insulation curtains, the indoor and outdoor temperature difference can be increased to {{7} } ~ {{8}} ℃.

The factors that affect the durability of the greenhouse are not only the aging resistance of the greenhouse materials, but also the carrying capacity of the main structure of the greenhouse. The bearing capacity of the main structure of the greenhouse is directly related to the heavy wind and snow load over the years.