Greenhouse horticulture is aiming for a dodo - destitute future by 2040 , which will make CO2 a lot scarcer and more expensive . This increases the pauperization to use available CO2 more efficiently , especially in leaping , summer and fall when airing is frequent . This is because CO2 concentration in greenhouses is influenced by respiration , dosage and crop uptake . Dennis Medema share a sketch on Kas als Energiebron on techniques to increase ventilating system pace with the target of saving CO2.Achieving a tightness of 380 ppm without CO2 dosing demand a ventilation pace of 16 - 26 / time of day , depending on light volume . With CO2 dosing of 30 kg / hour angle / hour , lower respiration multiple can do . With a dose of 60 kg / hour angle / time of day , CO2 concentration in the nursery always stay above 380 ppm .
In average weather , a natural ventilation rate of ~10 / hour can be accomplish if the vents are fully undefendable . However , a instinctive ventilation rate of ~5 / hour is more common . Thus , to increase this further , additional techniques will have to be used . However , the question is whether these techniques are usable and whether it is profitable to invest in such techniques . Therefore , word pick out space with various parties to clear up the above questions .
These discussions showed that ventilation multiple of 7 - 10 / 60 minutes should be technically feasible . By using this proficiency , in compounding with natural breathing , a ventilating system rate of 12 - 15 / hour should be feasible . PlantLighting ’s reckoning designate that such ventilation multiple are not sufficient to decimate the motivation to drug CO2 . A dose of 30kg / hour angle / hour is still needed to maintain a CO2 compactness of 380 ppm in the greenhouse .
Since CO2 dosing will still be needed despite the deployment of technology , the interrogative sentence is whether it is profitable to invest in engineering or whether it is secure to be frugal and efficient with CO2 dosing . A tribulation demonstrate that a dose of 8 kg CO2 / m² per year was sufficient for cucumber production at 400 ppm . Since invest in technology to increase the ventilation rate be ~€50.00 / m2 ( offer the Air&Energy system ) , even at gamy CO2 prices , it is economically more advantageous to dose to 380 - 400 ppm . In addition , growers can bear production losses in summertime due to lower dosing give low product prices .
This consultancy was conducted by Botany and fund and align by Kas als Energiebron , an innovation program of LVVN and Glastuinbouw Nederland . It was made potential in part by Kennis in je Kas ( KijK).Readthe final reporthere ( In Dutch)Source : Kas als Energiebron
