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INNIO Sustainability

CO2 Fertilization

CHP systems to fertilize plants.

When used in greenhouses, Jenbacher gas engines' combined heat and power (CHP) systems not only provide electricity for the public grid, but also heat and carbon dioxide (CO2) to fertilize plants and meet the requirements of an efficient greenhouse.

Plants grow by converting CO2 —also found in air—to carbon through photosynthesis, and greenhouse plants absorb even more CO2 because of the increased artificial lighting that is present. If the greenhouse environment is enriched with CO2, the temperature is kept constant, and sufficient lighting is provided, plant growth and the harvest yield can be increased significantly.

How does it work?

The energy created by gas engine cogeneration systems includes the electricity that powers grow lights and/or can be fed into the public grid, the heat that meets the environmental requirements of a greenhouse, and the CO2 from engine exhaust gas that fertilizes the plants.

  • When natural gas is burned in gas engines, nearly 1.8 kg of CO2 is produced per m3 of natural gas. This CO2 is present in the exhaust gas in a concentration of approximately 5 to 6% by volume.
  • After exhaust gas is purified with special catalytic converters (SCR and oxidation), it is cooled down by a heat exchanger to around 50°C and supplied to the greenhouse for CO2 enrichment.
  • Jenbacher aims at the greatest possible safety for vegetation. Therefore, a measurement and guarding device provides a constant assessment of exhaust gas levels.

Benefits of carbon utilization with CHP systems 

  • Excellent overall efficiency levels go as high as 95%, with high contribution to resource conservation.
  • Heat storage offers time-independent supply of CO2 and heat.
  • Zero to 100% load is achieved within 10 minutes.
  • Additional flexibility includes the option to supply electricity into the public grid.
  • LEANOX* lean mixture and Dry Low Emissions (DLE) combustion means very low emissions.
  • The DIA.NE* XT engine management system offers excellent operational safety and availability, as well as improved reliability with integrated grow light controls.
  • Application construction time is greatly reduced because the solution is highly standardized.
  • Design is lightweight, compact and modular.

Selected Case Studies

  • Case Study Den Berk - Foto

    Den Berk Délice (BEL)

    with combined heat and power


    Den Berk Délice, Belgium

    Installed engines

     6 x J416, 2 x J624

    Electrical output

     16,482 kW

    Thermal output

     20,948 kW

    Total efficiency

     102.3% (44.5% electricity, 57.8% heat)

    Energy source

    Pipeline gas


    2017, 2022

  • AGR Greenhouse image

    AGR Fenland Glasshouse (GBR)

    CHP energy center with an innovative heat pump system delivers power and heat with 30% less CO2 than conventionally heated greenhouses


    Cambridgeshire, United Kingdom

    Installed engines

     1 x J416, 1 x J620, 1 x J624

    Electrical output

     9 MW

    Thermal output

     11.2 MW

    Total efficiency


    Energy source

    Pipeline gas



Find all Jenbacher Case Studies

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  • Explore the advantages of onsite power generation solutions for your company
  • Discover how to use economic modeling for added financial benefit
  • Get answers on the technical aspects of your project—including fuel types, feasibility studies, and equipment and balance of plant selection
  • Learn how to take advantage of regional incentive programs
  • Review the delivery options for your project: purchasing, financing, leasing, and engaging a service provider, such as ESCO or BOO
  • Find out how to meet emissions targets

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