Qinghai Solar Greenhouse introduction of new insulation materials research and development and utilization of
[Keywords:] Qinghai new insulation materials Solar Greenhouse
First, the steel frame structure, the introduction of selection
To ensure that greenhouse insulation performance, reduce costs and make more scientific and reasonable design of the greenhouse, around the benefits of positive absorption, combined with the climatic characteristics of Qinghai Province, the choice of three different types of steel frame structure model: First, Yangling W-II type, that is 70mx8mx3.6m hot galvanized steel strip rolled a "few"-shaped steel frame structure fully assembled; second half bilayer structure assembly (Patent No.: 01243259.8); third ordinary welded steel frame the 60-80mx8mx3.5m galvanized steel. All three solar energy greenhouse frame and structure model selection, the advantage of curved frame design with science, which will help the absorption of solar radiation through large shed converted into heat energy, the arc easy to shed the forefront of the larger farming, steady and smooth frame, extending the life of greenhouse film. Through the introduction of these three structural tests, the following conclusions: Yangling W-II-type hot-dip galvanizing steel strip rolling system "a few" Font fully assembled and welded steel frame structure of ordinary steel frame greenhouses for vegetables, mushroom cultivation; semi-assembled bilayer structure of the greenhouse for flower cultivation.
Second, the complex study design wall insulation
Solar energy greenhouse heat loss up to the "tubular heat." Thus, the reduction of greenhouse insulation design, "Tubular heat" the first place. In many parts of Qinghai Province, to reduce the current "cross-flow heat" is the main way of greenhouse After the roof with gables and increasing the thickness or the use of heterogeneous composite structure, wall thickness equal to or slightly greater than the local thickness of frozen soil layer in order to achieve the insulation effect, but take up more of the arable land, waste of land resources. Therefore, in the same under the premise of the greenhouse area, reducing the wall thickness, improve land use, through the application of polystyrene insulation material, the introduction of insulation composite wall structures, based on the climatic characteristics of Qinghai Province based on combined greenhouse construction principle of the wall thickness was improved from 60 cm to 48 cm, internal and external walls, 10 cm in the middle of a new polystyrene board insulation materials, the improved design compared with the local greenhouse walls, reducing the wall thickness of 1 m , the construction of the same specifications of the greenhouse. can save up to 20% of the land, greatly increasing the effective area of the greenhouse to improve the land utilization.
Third, polystyrene insulation board sandwich introduction and application of production technology
The introduction of light weight, strength hardware, good insulation properties of greenhouse polyethylene composite insulation sandwich board (after the slope panel) production processing techniques. Polystyrene insulation board sandwich the development and application, mainly to solve the four problems: First, improve the insulation performance of the greenhouse; second, compared with the prefabricated panels, reducing the slope of the capacity after Greenhouse; Third, greatly reducing the greenhouse construction costs; Fourth, durable, and the civil structure is greatly extended useful life.
Fourth, conduction-cooled greenhouses heat underground Research and application of technical measures
Greenhouses for the current production base which had shallow, underground temperature cooling too quickly, and without a solid foundation, adopting the underlying depth of 60-80 cm from the past to 130 cm, the local frozen layer below. Meanwhile, in the temperature deepening the first beam shed 60 cm with 5 cm polystyrene. the application of these two measures, reducing the temperature of the greenhouse geothermal heat conduction, and also enhance the civil construction quality greenhouses to extend the service life.
In addition to these technical measures, there are also on the temperature of cold studio roof insulation material prior to the selection and so on.
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