A fully sustainably heated greenhouse by using the free power of the sun Tesselaar, The Netherlands About Tesselaar Freesia specializes in the year-round cultivation of Freesias in the Netherlands. These Freesias are still grown in the ground, with a layer of coconut as a covering. Tesselaar Freesia’s greenhouse is heated exclusively by energy from thermal solar collectors. The control and installations needed to efficiently use the solar heat were installed by Certhon. And the combination with a CHP, CHP and heat pump, ensures that only natural sources of heat are used. Crop Freesia Size 50.000m2 Location Heerhugowaard, The Netherlands Type climate control & installations Client Tesselaar Unique results: We give every project our fullest attention. Collaborating with you and exceeding your expectations. Resulting in exceptional highlights for this project too: Thermal solar collectors On the field next to the greenhouse you will find the thermal solar collectors with a net collector area of 9,300 square meters. This can be used to heat six acres of greenhouses, equivalent to a heat output of 500,000 cubic meters of gas. Temporary storage tank When the sun shines during the day, the heat is used directly to heat the greenhouses. There is also a 1,300 m³ storage tank under the site. Here the pre-heated water is stored and drawn upon at night to heat the greenhouses. Thermal storage system (WKO) In the winter, Tesselaar Freesia can benefit much less from solar energy, and this too has been considered. All the heated water produced in excess in the summer is stored in the ground in a so-called heat-cold storage system. Using a heat pump, the heat is extracted from the soil as soon as the greenhouse needs heating again. Heat pump In addition to heating the greenhouse in winter by extracting heat from the ground, the heat pump also serves in summer. The heat pump can then be used to cool the greenhouses with cold water. In this way, only natural sources of heat are used and a constant temperature is present in the greenhouses. "We can harvest a lot of heat with the solar thermal collectors. However, we had to deploy that in the right way, because then we have the most heat when we need it the least. That's why Certhon was the number one company to help us out and make this all work." Pip Tesselaar Owner Interested? Do you also want to achieve a great result for your company? Simply contact us; our international team will be happy to help: +31 174 225080. Jeffrey van der Sande Area Sales Manager