Industries
Liquid CO₂ for greenhouse enrichment
Outdoor air holds about 400 ppm of CO₂, and a closed greenhouse on a sunny morning drops below that within hours. Clean liquid CO₂ lets you hold 800–1000 ppm during the light hours without the heat and exhaust of burning gas.
How much CO₂ a greenhouse needs
Consumption depends above all on ventilation: with vents closed CO₂ accumulates, with vents open it leaves with the air. A guideline for pure CO₂ enrichment is 20–60 kg per hectare per hour during the light hours. The exact figure comes from your area, crop, target concentration and ventilation pattern.
| Area | Peak draw | Vaporizer | Tank |
|---|---|---|---|
| 1 ha | 30–60 kg/h | 100 kg/h | 10–20 m³ |
| 3 ha | 90–180 kg/h | 200 kg/h | 30 m³ |
| 5 ha | 150–300 kg/h | 300 kg/h | 50 m³ |
| 10 ha | 300–600 kg/h | 800 kg/h or two units | 80–100 m³ |
The vaporizer matters more than the tank
Greenhouse demand is peaky: dosing starts across the whole area at once in the morning. The tank only stores the reserve; delivery at peak is the job of the CO₂ vaporizer. An ambient unit uses no electricity but loses capacity in frost; an electric one is stable but costs to run. The choice is covered in Ambient or electric CO₂ vaporizer for a greenhouse.
What the system includes
- A cryogenic liquid CO₂ tank that takes one full road tanker delivery with a working reserve.
- A vaporizer, or a switchover pair for the cold season.
- Pressure regulation and a main line to the greenhouse distribution system.
- Gas detection in rooms CO₂ can reach: it is heavier than air and collects at floor level.
- Turnkey installation: foundation, tanker access, commissioning.
Frequently asked questions
Why liquid CO₂ rather than flue gas from the boiler?
Flue gas brings heat you may not want in summer and contaminants such as ethylene, NOx and carbon monoxide that damage crops if combustion is not perfect. Liquid CO₂ lets you dose independently of heating, at any time of year.
Does greenhouse CO₂ have to be food grade?
The crop absorbs the gas, so food grade or a dedicated horticultural grade is the safe choice. What matters most is the absence of the contaminants plants react to, so ask for a certificate for each delivery.
Equipment for this solution
- Cryogenic tanks for liquid CO₂ (carbon dioxide) 10–100 m³Supply of stationary vacuum-insulated cryogenic tanks for liquid CO₂ storage with volumes of 10, 20, 30, 50, 80 and 100 m³. Complete with shut-off and safety valves, pressure control systems, vaporizers and pressure-reducing units. Equipment selection, supply, installation, process piping and turnkey commissioning of the CO₂ system.
- Vaporizers (gasifiers) for liquid CO₂ — 100–1000 kg/hSupply of vaporizers for gasifying liquid carbon dioxide (CO₂) with capacities of 100, 200, 300, 500, 800 and 1000 kg/h. Solutions for greenhouses, beverage production and bottling, food and industrial plants. Selection, supply, installation and integration into the CO₂ supply system.
- Turnkey installation of cryogenic and gas supply systemsWe install cryogenic tanks, vaporizers, gasifiers, pipelines, reducers, pressure regulators and shut-off and safety valves for CO₂, N₂, O₂ and Ar. The scope covers equipment selection and supply, installation on prepared foundations, process piping, connection and start-up of the gas supply system.
