拉幕-荷兰式外遮阳GreenTop Outside screen system.pdf

GreenTo p Outside screen system Greenhouse climates can be controlled better if certain weather factors can be ‘screened out’ outside the greenhouse. Excluding sunlight reduces solar radiation and lowers the temperature, which is especially important for high-quality ornamental plants like orchids and roses. Outside screening also means electricity savings due to a decreased demand for cooling and higher CO concentrations less loss through ventilation. And thanks to its insulating effect, there are signicant energy savings in the spring and autumn. The GreenTop outside screen from Van der Valk Horti Systems adds even more benets to this list. Calculation program Calculation toolDeveloped in collaboration with TNO and other partnersCalculates the forces rted on the structure for each projectInsurable according to TNO norms Sustainable The cheapest cooling Less solar radiation, so lower greenhouse temperatureDecreased need for coolingHigher CO concentration, less loss through ventilationCan be provided with solar panels, approx. 350 m per ha. Lightweight and compact Construction on the ridge of the greenhouseFreely accessible guttersNo accumulation of dirtSlender Valk-Plus push rodsMinimal light lossWHY VAN DER VALK HORTI SYSTEMS The only company in the world specialising exclusively in the development and production of ventilation mechanisms and screen systems Engineering and production are both in house Innovative systems with distinctive benets for growers Quick and reliable deliveries due to our modern machinery and large stocks Technical, commercial and project support provided by enthusiastic staff Quick and efcient mounting using unique, well designed and high-quality components System supplier since 1963 GreenTop truly a TOP product Hinged construction The compactness of the construction is primarily due to the use of slender Valk-Plus push rods, which have been the standard for decades in their application in vent-opening systems in greenhouses. With the GreenTop outside screen, they are applied as carriers of the screen trusses, mounted next to the glazing bars as an inverted V on the ridge. The V-carriers are hinged on both the underside and the top. This allows them to absorb lateral movements, preventing additional load from being put on the ridge due to torsion in the structure. The height of the outside screen is of course determined by the length of the V-carriers, which are manufactured entirely to the client’s specications. Optional solar panels GreenTop outside screens are also available with integrated solar panels to generate electricity. A xed cap is made of solar panels and placed precisely above the screen system so there is no further loss of light. The green electricity generated can be used to meet part of the energy requirements in the greenhouse air conditioning units, pumps, refrigerating units, etc. without substantial transmission losses. Van der Valk Horti Systems BV, Zwartendijk 73, 2681 LP Monster, The Netherlands, T 31 0174 21 22 23, F 31 0174 24 27 27, infovalksystemen.nl DEVELOPER AND PRODUCER OF VENTILATION MECHANISMS AND SCREEN SYSTEMS V01-2016 CONTACT VAN DER VALK HORTI SYSTEMS OR YOUR GREENHOUSE BUILDER / INSTALLER FOR MORE INATION. ValkScreenVision KliMax Strong brand names of Van der Valk Horti Systems StabiMax XLDriveLine GreenTop ValkTriplePlus