More and more greenhouse growers are tackling high-pitched energy price with newfangled or additional screen fabric . To keep the indoor mood optimal in this billet , they are also investing in advanced dehumidification and ventilation system proficiency .
At Technokas , they notice this through a strong growing demand for systems for ' Het Nieuwe Telen ' ( The New Cultivation ) . In recent months , more vegetable grower than ever ordered the airwave coach that Technokas can install in the façade or deck . These units can draw in outdoors and inside breeze to blow this ( mixed ) melodic line into the greenhouse in a controlled mode via a fan , heating block , and air distribution hoses , Technokas report .
After Technokas antecedently installed the air do by unit of measurement at Schenkeveld ’s sizable tomato company , near Schiphol Airport , in its two newest greenhouses add 20 hectares , requirement is now also coming in from other vegetable growers . These installation can achieve positive answer in tomato , aubergine , and black pepper .
The most late project have been carry out at Van Duijn De Jong Aubergines in Oosterland , on Schouwen - Duiveland , and at D.T. van Noord ’s Lycopersicon esculentum glasshouse in Sirjansland , almost a neighbour of Van Duijn De Jong . Pepper raiser Overgaag has also ordered the scheme with AHUs for their new nursery to be built in Maasland . They can have this applied science at their disposition next year .
" grow becomes much easier"At Van Duijn De Jong Aubergines in Oosterland , farm manager Gerard van Vossen is very enthusiastic and pleasantly surprised by the confirming outcome . " By nature , I am quite hesitant about these form of young techniques and promises . We also went to see Schenkeveld , but even then , I had some reservation about the results we could achieve with it and the investment we had to make , " agree Van Vossen . " But the system has now been do work since December when we begin the novel craw , and I am , perhaps a fiddling against my nature , wildly enthusiastic . "
" Growing really is getting so much light . I have on the spur of the moment gained a mass of tools . I can work with blotto line of credit . Controlling for wet or temperature is fully automatic . I can activate the crop properly in the dawning , even in dark weather condition . Because we have another greenhouse where we do n’t have this system yet , but where we do have a fixed and movable screen , we can make good comparison . Growing has really become a top - course of instruction sport . With the air handling units and trunks , performing is a lot easier and with better results . Compared to the greenhouse without this system , we have saved about 20 % of energy here . That ’s above expectations . "
ameliorate performance furtherVan Vossen expects it to get even easier in the coming year and to potentially better execution . " In the root , you ’re hesitating to get everything out of it . I had to gain confidence in the system , but it really works well . I even presume to keep the concealment close all twenty-four hour period on dour day . The only grounds we had to heat more than was really necessary is because we do not yet have an substitute result for the CO2 . " To set up the system in the 27,500 m2 nursery , with a sewer height of 6.6 m , Technokas installed the air handling units ( AHUs ) above the itinerary in the deck .
The concrete path runs along the end bulwark . Van Duijn De Jong Aubergines plans to extend this glasshouse at the death wall in the time to come , after which this way of life will become a in-between course . Eight AHUs are currently install , with air ingestion through the deck of cards .
These AHUs are already directly worthy for a next annex on the other side , but for now they are only outfit with fans , mixing valves , mix bedroom , and heat pulley block on one side . These facility can later also be incorporated on the other side . The air travel distribution hosiery on the side now in use are about 125 meters long . So there is now one AHU for every three 8 - meter rail , i.e. , every 24 time . This gives the AHU a coverage of 3,000 m² , with a capacity of 15,500 m³/h , which equates to about 5 m³/hr / m² .
AHUs in the end wallsNeighboring D.T. van Noord ’s greenhouse is over 3.5 hectares , with a gutter height of 5.5 metres . In another nursery , where Van Noord already dehumidify , the tomato agriculturist utilize a unlike system with trunks under the crop . But for this large glasshouse in Sirjansland , Van Noord pick out Technokas ' system with air discourse units on two sides in the terminal bulwark and , therefore , hoses above the harvest . Technokas installed a total of 13 AHUs , 6 on the short side and 7 on the recollective side .
All AHUs are equipped with internal and extraneous dampers , a mix sleeping room , a heating block , and a fan . The air distribution hoses are about 83 and 90 meters long each . With one zephyr handle unit per four 8 - meter rails , i.e. , every 32 cadence , the capacity here , too , comes to about 5 m³/h / m² .
Relatively few adjustments"To install these atmosphere handling units , we had to modify the façade more or less , " explains Freek Batist of Technokas . " But the adjustments more often than not stay very modified . The installers adjusted the façade screen door installation more or less , connected the heating blocks of our AHUs , and provided the electrical connections and computer controls . So we were capable to deliver the installation in a unforesightful time in other 2023 , after which Van Noord was capable to start using the benefit now . "
First installation for white pepper cultivationAnother nursery that will begin using the system next year is Kwekerij Overgaag . These pepper growers will realize a nursery expansion of over 4 hectare at their Maasland site . At this nursery , Technokas will start installing six AHUs above the middle gangway in September , with breeze intake through the deck . " These AHUs do straightaway blow out out to two side , so in fact , they are 12 units , each equipped with inner and outer valves , a mixing chamber , a heat city block , a fan , and air statistical distribution hose approximately 92 beat long . "
" These units have a capacity or flow rate of 15,250 m³/h , tantamount to about 4.6 m³/hr / m² . This is on purpose slenderly low-pitched than for tomatoes or aubergines , " says Batist , " but that ’s because the ' drier ' cultivation of sweet white pepper has slightly dissimilar requirements . So Technokas will always , in consultation with the agriculturalist and their cultivation requirements , plan , and engineer the AHUs entirely to size . "
For ornamental and vegetable cultivationIn previous yr , it was primarily cultivator of cosmetic crops , such as orchid , roses , chrysanthemums , and a few other crop , for whom AHU system were democratic . " Those raiser also still come to us for this engineering . For example , this yr , we installed 12 AHUs in the facade of an survive greenhouse in Naaldwijk for KP Holland to raise Curcuma . Kwekerij Apartus also has advanced plans to have 12 AHUs install in the façade of their Cyclamen greenhouse in Poeldijk . But now vegetable growers are also discovering the advantages of dehumidify , ventilating , and heating with AHUs in their hunt for fresh manner to save energy , and especially for tools to good see the indoor climate .
For example , Technokas will before long set up two AHUs in the façade at Arjan Bassie ’s Nursery , which manage Syngenta ’s love apple test greenhouse in Maasland . Besides the enterpriser mentioned , other growers have submit applications . Some will make a determination shortly , and others will apply for subsidy first and make the decision as soon as they receive subsidies . " Especially with the current Energy Department rates , put in AHUs is already very interesting for many agriculturalist even without a subsidy , exactly because , in addition to the savings , it provides a effective unvarying indoor clime , " concludes Batist .
For more data : TechnokasLeehove 332678 MA De LierTel . : +31 ( 0)174 24 05 45[email protected]www.technokas.nl
