What is the span and bay of a terraced greenhouse?
At present, the common multi-span greenhouse style has round arch and pointed roof style. Before explaining the direction of the greenhouse, let's first understand the span and room of the greenhouse. The span of the greenhouse refers to the distance between the two main columns perpendicular to the direction of the gutter, generally called the end of the greenhouse. The opening of a multi-storey greenhouse refers to the distance between the two main columns parallel to the direction of the greenhouse gutter. The span of the greenhouse has 8.0m, 9.6m, 10.8m, 12.0m, 16.0m and other specifications, and the greenhouse is generally 4.0m and 8.0m. Of course, it can also be designed according to the specific terrain, and the span and opening size can be designed according to local conditions.
In agricultural production, the conventional span generally refers to the east-west direction of the greenhouse, and the opening direction generally refers to the north-south direction of the greenhouse. There are two main factors affecting the span and orientation of multi-storey greenhouse. One is the Angle and area of the multi-span greenhouse to receive sunlight, and the other is the direction of air flow in the greenhouse.
First, multi-span greenhouse sunlight acceptance rate
Whether it is a circular arch multi-span greenhouse or a spire shaped greenhouse, its circular arch and spire have a certain height, and the roof is north-south, so the sunlight will not have too much shadow area into the greenhouse. If the direction of the greenhouse is changed, the sun shines on one side of the roof ridge at noon, and the other side is easy to leave a shadow. Therefore, engaged in agricultural cultivation, greenhouses with strong lighting requirements are generally chosen to go north-south.
Second, multi-span greenhouse internal air flow movement
Due to the cooling of the multi-span greenhouse in summer, it is mainly completed by the fan water curtain. The working principle of the fan water curtain is that the fan and the water curtain are installed on two opposite sides, the fan draws air out, the negative pressure is formed inside the greenhouse, and the outdoor air enters the greenhouse after cooling through the water curtain. The gas entering the room moves along the ridge direction without hindrance, and if it moves perpendicular to the ridge direction, the airflow will be hindered, thus affecting the cooling effect of the greenhouse.
Therefore, partners engaged in agricultural production, when choosing a plant-type greenhouse, try to make the opening of the greenhouse north-south direction, the span is made of east-west direction, and in some special terrain cases, you can also design the opening and span direction according to local conditions. For example, if it is made into an ecological garden greenhouse or a flower market greenhouse, you can change the direction of the greenhouse at will.
