In 2018 and 2019 , Delphy IC in Bleiswijk , the Netherlands , had two research departments of 1,000 m2 equip with AVS - carbon public discussion unit . It was the starting line of multi - year inquiry into fogy fuel - free culture . “ This system pop the question a fast traveling bag on nursery clime control , ” says Lisanne Helmus , Research Manager . “ Thanks to the cooling and heating plant engine block , we ’re able-bodied to easily adjust the inlet temperature and completely disconnect temperature and humidness mastery . In combining with thermal energy repositing and a heat energy pump , we use hardly any gun . ”
The multi - year , energy - efficient cultivation trials at Delphy Improvement Centre will certainly pick up great interest from the sector . That was already the type before the price of natural natural gas and electricity went through the roof in 2022 . Now the necessary for energy effective cultivation is bully than ever .
Helmus : “ We do it by systematically applying the principle of vigor - effective cultivation . So we rely heavily on screens , use full LED lighting installation and have facilities to harvest and lay in excess oestrus , so that we can forgather the heat need later . "
Active dehumidificationEfficient culture under full LED and shut sieve means that the moisture that evaporates during the heating season can not be removed via screen col and air vent . After all , this would also get a lot of vigour loss . The AVS - C units have both a heating occlusion and an extra cooling block , which extracts moisture from the greenhouse air . During abridgement of the moisture , ( latent ) hotness is unfreeze , which is absent and stored for later use , when there is demand for it .
brusk and long - term storageFor that intent , Delphy IC has a heat heart and dusty & high temperature storage facility for both brusque and long menstruum of clock time .
Helmus : “ In the test we are mainly focus on harvest home heat and using it again in the shortsighted terminal figure , because this demand down investments . The way we use it in the trials is most relevant . On balance , we have to apply very niggling gas to meet the heating demand . Last year , this was only about 5 m3 / m2 for the tomato plant cultivation with artificial inflammation . Thanks to AVS - C , we were able to make up the remainder from the short and long - full term depot arrangement . We also used electricity , of course of instruction , which in the future will mainly be generated in a sustainable way . ”
VersatileWhen asked about how it differs from other system for active dehumidification , the research manager says : “ With the AVS - C , you have multiple options and you are less dependent on the stipulation out of doors . you may dehumidify using outside melody that is drawn in , as well as ventilate and dehumidify internally via the cool block . In add-on , you could habituate the harvested heat instantly , or hive away it for later exercise . Not all systems can do that . We are grateful to be able-bodied to take advantage of this versatility to have maximal control of the climate with minimal use of fossil fuels . ”
unexampled sweet capsicum trialAt the research institute they like the active ventilation organization so much that a third department was fit with it in 2022 . “ The trial for fossil fuel - free love apple and chrysanthemum crop without artificial lighting are ongoing , ” Helmus says . “ This year we also started a multi - year angelical pepper trial . AVS - C enables us to take special steps in energy preservation . ”
Since there is no contrived lighting , there is less wet to manage during the first stage . This also entail that less latent heat can be harvested and there will be less excess heat . Another new aspect is that the distribution hoses for the treated melodic phrase are not hung underneath the cultivation sewer , but above the crop , as in the chrysanthemum glasshouse .
Temperature gradient“That ’s not rough-cut in fruit vegetable crop , but we made a conscious determination to do it this way , ” says Helmus . “ When you bring comparatively cool air to the bottom of the greenhouse during combat-ready dehumidification , it will linger there longer and flux less easily with the rest of the nursery air . This is damaging to the temperature slope . We think it would be useful to gain experience with the installed distribution hoses . They ’re transparent , which limits light red ink . The issue will have to show whether this in reality head to efficiency amplification and whether it can be applied on a larger scale . ”
For more info : Van Dijk heating+31(0)30 656 38 44[email protected]www.vandijkheating.com
