Heat Storage and Use of Aquifers for Heating in Minneapolis, Minnesota, U.S.

By District Energy posted 15 days ago

  

Think GeoEnergy

Summary

With increasing blurring of lines between traditional hydrothermal geothermal energy with heat exchange systems of groundsource heat pumps, we are likely going to cover a few more related topics going forward.

In the past we have reported on efforts on utilizing aquifers for heat storage and some deeper heat exchange systems, so this story caught our attention.

The city of Minneapolis in the State of Minnesota, Upper Midwest in the United States is developing a project to use groundwater to heat and cool buildings for a new district in the city. By drawing heat from buildings during warmer months, it then stores that energy in the aquifer beneath the buildings. In the colder months, that energy is then used as base heat for electric pumps then heating the building.

The temperature of the aquifer will then not be sufficient alone, yet the geothermal capacity in the aquifer allows then the use of less electricity to increase the heat sufficient for heating the building or hot water use.

More details on the project via the website of Ever-Green Energy.

Similar projects are already in place, e.g. for the German parliament in Berlin (article from WGC 2000) and a coverage on research by KIT in Karsruhe, Germany we reported on.

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