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The overall performance, expressed in some key numbers and sustainability, is compared in the table below.
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Illumination increases energy demand
The greenhouse without illumination naturally has the lowest energy costs, but has also a substantial lower production. The lower production will have a detrimental impact on the financial feasibility.LED illumination has lower energy demand than HPS
When comparing the illuminated greenhouses, the cases with LED lighting clearly have lower costs than the greenhouses with HPS lighting. This benefit is to be expected, but has to be weighed against the higher initial investments for LEDs compared with HPS-lamps to determine the financial feasibility.CHP decreases costs but increases CO2 emissions
Under the assumed economical conditions, options with CHP lead to lower costs, but higher CO2 emissions.
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