To heat our greenhouses, we use geothermal energy, heat pumps, and biomass, supplemented by CHP units.
A CHP unit (Combined Heat and Power) is a system that generates both heat and electricity simultaneously. Fuel is burned in an engine, which drives a generator to produce electricity. The by-products of this process—heat and CO₂—can then be used effectively, for example, to heat greenhouses and nourish plants.
In many industries, these “byproducts” go to waste, but not in greenhouse horticulture. At Hoogweg, we can actually put them to great use in our greenhouses. Through a network of pipes, the heat from the CHP units is distributed, ensuring that the plants grow under optimal conditions.
The CO₂ that is released doesn’t go to waste either. It is purified and then used as a nutrient for the plants. CO₂ is essential for photosynthesis and helps the plants thrive even more.
The electricity we generate is mainly used within our own company. What we don’t need ourselves is fed back into the power grid. This means other gas and coal power plants have to generate less electricity, which in turn reduces CO₂ emissions and heat production elsewhere.
Emergency power is electricity that is needed when there might be a shortage on the energy grid. This can cause an imbalance in the system. Growers with a CHP unit can help during these peak times by supplying extra electricity when it’s needed most. In this way, we help keep the grid stable and prevent blackouts. You can think of it as an energy buffer for the network.
