Geo-thermal storage is a sustainable source of energy in which heat and cold are stored in a sand aquifer at a depth of between 40 and 90 metres. In summer, buildings are cooled with water. The heated water, with a temperature of approximately 17 °C, is then stored in a hot well. In winter, the hot water is pumped up and used to heat the ventilation air. The water cools to approximately 6 °C and is stored in a cold well. The groundwater is therefore pumped back and forth between the cold well and the hot well.
Geo-thermal system on the CampusThe geo-thermal system on the Campus consists of six hot and six cold wells, at Forum, Radix, Atlas, Actio, Impulse, Helix and Orion. A cold well plus a hot well is known as a doublet. The aim is to extend the system to 19 doublets in the future. The possibilities have been set out by Wageningen UR and an expert advisor in a Framework Plan, which addresses, amongst other things, optimal and sustainable utilisation of the available substrate.
A pilot was conducted with a view to optimising the geo-thermal system on Wageningen Campus. The aim was to determine the demand profiles of the connected buildings. The pilot led to the formation of an MYA3 (Multi-Year Agreement 3) user group called ‘Optimisation of the Geothermal Service Sector’. Wageningen UR is participating in this group.