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Energy use: Artificial illumination typically increases energy demand, but reduces heating demand.
Without CHP, the greenhouse has to import a substantial amount of electricity. This electricity is then converted to light, but also to heat. Therefore the heating demand of an illuminated greenhouse is in general lower than that of a non-illuminated greenhouse. The decrement is however less than one might expect, which is caused by the fact that a crop requires a higher average greenhouse temperature when there is more light available for growth.CO2 footprint: The use of CHP-engines typically increases the CO2 footprint of the greenhouse.
CHP-engines typically uses use natural gas, the . The CO2-emission associated with the electricity use of an illuminated greenhouse with CHP will be substantially higher compared to a non-illuminated greenhouse.
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