Photovoltaic agricultural greenhouses are a combination of photovoltaic power generation and agricultural production. Above the solar power generation, the new photovoltaic system engineering under agricultural production is a new model of modern agricultural development. Photovoltaic agricultural greenhouses not only do not occupy additional cultivated land, but also add value to existing land.
This article mainly based on the combination of photovoltaic modules and agricultural greenhouses, the current classification of major photovoltaic greenhouses, mainly divided into the following three types of forms: The first major category for agricultural greenhouses is a closed greenhouse, the components are arranged on the roof of the greenhouse; The second category is that the agricultural greenhouses are enclosed greenhouses. The photovoltaic modules are separately provided with brackets arranged behind or above the photovoltaic greenhouses. The third category is open agricultural greenhouses. The agricultural greenhouses are composed of photovoltaic modules and supports, and the agricultural greenhouses are not closed.
The first category
Photovoltaic modules are laid on the top of enclosed agricultural greenhouses. According to the structure of agricultural greenhouses, there are mainly the following types:
1) Steel Truss Structure Greenhouses for photovoltaics, which are widely used in greenhouses, generally consisting of steel columns, trussed beams, truss structures, as the main force components, roofing, slats, and glass panels or photovoltaic modules, walls Pressed steel plates or glass panels are used as enclosure structures. The more commonly used triangular truss and parallel string truss.
2) Door type steel frame structure form, this kind of door type structure application is also more extensive, mainly consists of steel column and steel beam consisting of the main force components, laying roof beams, purlins, laying a glass plate or profiled steel plate, and then Shop PV modules. There are relatively simple portal steel frames and large span portal steel frames.
3) In the form of steel frame structures, steel frame structures are generally modeled by steel columns and steel girders, and roofing paving strips, grate strips and glass panels or photovoltaic modules, and wall panels are made of profiled steel plates or glass panels as enclosure structures. Steel frame structure greenhouses are less widely used, and because of their lack of truss and portal steel frame spans, and large amounts of steel, they are less used in photovoltaic greenhouses.
The second category
Photovoltaic modules are not laid directly on the shed. There is a separate bracket behind the enclosed agricultural greenhouse, in the middle or above. According to the different combinations, it is mainly divided into the following types:
1) The agricultural greenhouse adopts the form of a simple steel greenhouse. The bracket is in the form of an ordinary steel bracket. The skeleton steel pipe of the agricultural greenhouse is connected to the vertical standpipe (beam) of the photovoltaic bracket.
2) The agricultural greenhouse adopts the form of a simple steel greenhouse. The bracket adopts the form of an ordinary steel bracket. The photovoltaic bracket is set behind the agricultural greenhouse. The two structures are independent.
3) The back wall and gable of agricultural greenhouses adopt the brick-concrete structure, and the photovoltaic support columns are erected on the back wall structure.
4) Between photovoltaic stand and agricultural yin and yang shed.
5) The columns of some agricultural greenhouses have been extended into photovoltaic supports and erected on top of agricultural greenhouses.
The third category
Open agricultural greenhouses, it also has several forms:
1) Simple photovoltaic stent shed, which is actually a form of photovoltaic support that raises the photovoltaic support and grows crops below.
2) The main structure of photovoltaic greenhouses adopts a portal type steel frame structure, photovoltaic modules are laid on top, and the following species are planted with crops. Generally, this type of support structure is high, which facilitates the operation of agricultural machinery.
3) Photovoltaic supports adopt steel pipe columns and steel pipe beams (steel cables are also available). Racks are raised to higher heights. Spacing between the above components and the distance between the supports is relatively large, which does not substantially affect the growth and agriculture of the following farming operations. Mechanical work.
4) It is basically the same as the open bracket made of the third kind of steel tube column steel beam above, but its bracket is a tracking bracket.
5) Photovoltaic supports adopt a steel frame structure composed of steel columns and steel girders, and are topped with purlins and photovoltaic modules. Planted crops below are generally higher in overhead, and the steel used is also relatively large.
Of course, there are many different forms and classifications of agricultural photovoltaic greenhouses. The above is only the personal views and understandings of Xiaobian. If there are inadequacies and inaccuracies, please criticize and correct me. The next time Xiaobian will briefly explain the application, design and drawings of the above agricultural greenhouses.
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