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The groundwater circulation well – Maximum performance from a single borehole

Highest level of efficiency andperformance at a low space requirement – this is a mark of the groundwater circulation well developed and patented by Geo-En. The groundwater circulation well is a highly efficient energy solution especially on closely built properties or in an existing building, as it can obtain up to ten times as much geothermal heat as a classic borehole heat exchanger. As a manufacturer of the groundwater circulation well, we specify and deliver all components, convert the well and develop it. Our experience of over ten years in the construction and operation of groundwater circulation wells helps us here.

The groundwater circulation well combines two wells coaxially in a single borehole and can then through such a compact space supply heating and cooling to large buildings. The groundwater is taken at the toe point of the borehole and is fed through the inner pipe of the coaxial systemto the heat pump. After the heat energy or the cold energy is extracted, the groundwater is again fed through the outer pipe in to a twenty-meter high level. In the aquifer, the water first circulates on a large scale and then changes to thermal energy. The groundwater circulation welldocks such a large thermal volume underground that the temperature of the circulating water remains stable through the year.  In winter, temperatures are well above zero degrees for a highly efficient operation of the heat pump. In summer, the groundwater circulation well also delivers sufficient cold energy even on extremely hot days and even tolerates midday peak loads. This renders the energy-intensive cooling units superfluous. This is why the integral prove is specially and effective and economical.

Hydrogeologically, the groundwater circulation well also provides another benefit: unlike a two-well system, the groundwater is not moved horizontally but taken at the same point where it is fed. Hence, the groundwater levels do not mix and the groundwater level around the borehole rarely changes. Geo-En has been examining the hydrogeological and chemical effects since years and is researching them cooperation with TU Berlin. Thus, basic approaches are always identified in order to continue improving the performance and scope of application of the groundwater circulation well.

 

Groundwater circulation well: High-performance
geothermal source for thickly built properties

Warm groundwater is aspirated through the lower filter route and transported to the heat pump. Cooled water flows from the pump to the upper filter section. From there, it flows back into the aquifer, where it holds thermal energy.

 

Measuring data of two geothermal systems
The groundwater temperature remainssignificantly more stable than the brine temperature of the probe field through the year.

Hydrogeologically, the groundwater circulation well also provides another benefit: unlike a two-well system, the groundwater is not moved horizontally but taken at the same point where it is fed. Hence, the groundwater levels do not mix and the groundwater level around the borehole rarely changes. Geo-En has been examining the hydrogeological and chemical effects since years and is researching them cooperation with TU Berlin. Thus, basic approaches are always identified in order to continue improving the performance and scope of application of the groundwater circulation well