Product of dienst

Thermal storage

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 Campus

The 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.
The groundwater is pumped back and forth between the cold well and the hot well.
The groundwater is pumped back and forth between the cold well and the hot well.

Optimisation

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.

Expansion

Nineteen hot and cold wells have been positioned in the Framework Plan with a view to anticipated new-builds and renovations. Consultations are underway with the provincial and the municipal authority to anchor the Framework Plan firmly within the scope of the government decree (Algemene Maatregel van Bestuur). Third parties who want to set up businesses on the Campus will have to meet the conditions in the Framework Plan.