Grid: The span of brick-wall solar greenhouse is 8- 16m, and its wall structure is red brick or concrete foam brick, and the wall thickness is generally 0.37-1m.. Other structures are basically the same as the earth-wall solar greenhouse, all of which are all steel skeletons, covering films, insulation quilts and rolling shutters.
If several steel skeletons are used as roof supports, the cost per meter of greenhouse can be reduced. The brick wall costs about 1000 yuan per meter, and the greenhouse cost can be reduced by using concrete foamed bricks per meter 100~ 150 yuan.
Advantages: the brick wall structure is firm and durable, and its service life can reach 20~25 years; Brick wall solar greenhouse has high land utilization rate and strong regional applicability, and is especially suitable for construction in areas with complex geology, low water level and inability to build earth walls.
Disadvantages: Due to the brick wall structure, the cost of greenhouse is higher than that of earth wall solar greenhouse, and the investment payback period is longer.
Extended data:
Vegetable farmers should choose suitable covering materials for vegetable greenhouses according to their own production needs.
(1) ordinary membrane. Using polyethylene or polyvinyl chloride as raw materials, the thickness of greenhouse film is 0. 1 mm, which is colorless and transparent; The service life is about half a year.
(2) Multifunctional long-life membrane. It is made by adding proper amount of anti-aging materials and surfactants in the process of polyethylene blow molding. The width is 7.5m, the thickness is 0.06mm, the service life is 1 times longer than that of ordinary film, and the greenhouse temperature at night is1-2℃ higher than that of other materials; The film is not easy to drip, with good covering effect, low cost and high benefit.
(3) grass cover and grass fan. It is woven from straw and has good heat insulation performance. It is a kind of heat preservation material at night.
(4) Polyethylene high foaming film. White plastic film with many bubbles, width of 1 m, thickness of 0.4-0.5 cm, light weight, rollable, and thermal insulation similar to grass quilt.