Storage potential in the formation of Breda

With high temperature storage (HTO), a permeable package is used to store (a surplus of) hot water, so that it can be extracted at the time it is needed. Usually, two different temperatures are used: 90 degrees Celsius for the middle well with a “buffer zone” around it with wells where water of 40 degrees Celsius is injected. For the potency calculation, an average temperature of the two is calculated: 65 degrees Celsius. The average temperature of the Breda Formation is 28 degrees Celsius. The injected water has a higher temperature, and therefore also a lower viscosity. This viscosity is 0,00043 pascalseconds (Pa.s) and the viscosity for water of 28 degrees is 0.00083 Pa.s. This means that it will be possible to extract water with a higher flow rate than in the case of shallow geothermal energy (OGT). The conversion factor for the Breda Formation is 1.93. The flow rate to be extracted will therefore be almost twice as high at HTO as with OGT.