Dutch greenhouse construction technology Today is widely known all over the world. The use of these structures allows you to grow abundant crops at minimal cost.
Thanks to the use of "closed cultivation" technologies, the amount of pesticides and fungicides is significantly reduced, which ensures the cultivation of environmentally friendly products.
Features of the Dutch greenhouses
Growing vegetables in artificially created conditions has long become commonplace, however greenhouses in Holland served as the starting point of a powerful breakthrough in this area, due to the presence of many advantages.
Thus, the Dutch greenhouses most often used as industrial facilitiestherefore, their use in the private sector is not entirely appropriate.
The metal precisely calculated framework provides reliability and durability of a design.
Often, large greenhouse complexes have certain difficulties associated with the diversion of water, which is formed as a result of precipitation.
To combat this problem has been developed aluminum gutter. A feature of this device is the presence in its equipment of special glass sealing, as well as built-in condensate drain.
With its considerable length (60 m), the greenhouse structure is protected from the formation of the so-called droplet, which negatively affects the growth of plants. Carefully thought over design is arranged in such a way that even with heavy rains the water does not penetrate space, draining on the glass.
Advantages and disadvantages
Advantages of Dutch greenhouses:
- the size of the structure is calculated using the special CASTA program that is popular all over the world, which makes it possible to obtain more accurate indicators in the calculation;
- The method of calculation used assumes that the amount of light penetrating inside the room depends on the thickness of the hull walls. The ratio of these factors, according to experts, is 1% to 1%;
- The greenhouse is equipped with anti-propellant terminals, which protect the structure against strong winds.
Frame material
The frame base of the Dutch construction can be made from both steel and aluminum.
The quality of steel structures depends not so much on the thickness of the metal as on the correctly calculated calculation of the ratio of the metal capacitance and the amount of light entering the room.
Aluminum construction is used in the construction of greenhouses such as Venlo. This modification can rightly be called most modern systemDue to the presence of a number of underlying factors:
- the system has been in use for many years, which indicates that significant experience has been gained in this direction;
- significant new investments are regularly made in new developments;
- certification in the EU due to strict regulations.
Deficiencies not identified.
A photo
See below: industrial greenhouses Holland photo
Dutch greenhouse cover
As a coating for this facility, special float glass is used. The advantage of such a material is that in its production they apply the latest technology of shaped casting.
This technique gives the glass the following properties:
- the ability to pass more than 90% of the light, thereby increasing the volume of the crop;
- the presence of tolerances on all sides (+/- 1 mm) facilitates convenient fixing of the glass;
- material is durable and has a high degree of insulation;
- The surface has a uniform density, which gives the glass additional resistance to snow and wind loads.
Ventilation
Due to the high height of the structure (6 m) and the presence of ventilation frames, the Dutch greenhouse has high-quality ventilation.
Even with incomplete opening of the transoms, the tall structure is ventilated much better than the lower building with fully open frames.
In low buildings, the rate of movement of air decreases due to plants, which leads to a deterioration in heat transfer. In tall buildings, plants are less obstructed by airflow.
Irrigation system
Irrigation system is fully automated. All the equipment is assembled at the production site, after which it is delivered to the construction site as a finished product. The system is controlled by computerthat allows you to create an optimal microclimate for grown crops.
Curtains
This system is used for single glazing and is a special, vertically moving screens that are opened and closed using control mechanisms.
Such barriers are installed around the perimeter of the greenhouse structure, which allows adjust the amount of light entering the room. Also, the screens perform the function of auxiliary heat insulators.
Lighting
Lighting equipment is installed in accordance with careful calculations. For the most efficient lighting fittings are mounted right under the truss itself. The system is equipped with 750 W lamps, which are switched on and off in stages.
Dutch technologies and the use of a whole complex of modern equipment allowed the Dutch greenhouses to occupy one leading position in global agricultural production.
