| Title | Shallow Geothermal Energy – Where Does the Energy Come From? |
|---|---|
| Authors | Hellström, G; Gehlin, S |
| Year | 2016 |
| Conference | European Geothermal Congress |
| Keywords | Shallow geothermal Energy, BTES, Heat flow, geothermal heat flux, renewable energy, energy balance |
| Abstract | Shallow Geothermal Energy Systems provide local, free and renewable energy from the underground. The energy reaches the ground via solar radiation, air, groundwater and geothermal heat flow from the Earth’s interior, and is stored as sensible heat in the ground material and groundwater. This paper sorts out the energy balance and contribution from the different heat sources over time for the undisturbed ground as well as for extraction-only ground source heat pump (GSHP) systems and underground thermal energy storage (UTES) systems. |