Geothermal energy and district heating in Ny-Ålesund, Svalbard
This thesis presents the possibilities for using shallow geothermal energy for heating purposes in Ny-Ålesund. The current energy supply in Ny-Ålesund is a diesel generator, which does not comply with the Norwegian government and Ny-Ålesund Science Managers Committee’s common goal to maintain the natural environment in Ny-Ålesund. Ny-Ålesund has a potential for replacing the heat from the current diesel based energy source with geothermal energy. Geothermal energy is considered to have low impact on the environment, and is therefore a good alternative to make Ny-Ålesund renewable. Ny-Ålesund is found suitable for the use of shallow geothermal energy. Considered factors are geology, the geothermal gradient, the groundwater flow and the permafrost depth the area. A geothermal system can be included in the existing district heating system, and replace the heat produced by the diesel generator. A model containing the geological and physical properties in Ny-Ålesund is created using COMSOL Multiphysics. Simulations of a geothermal system with a 100 meter deep pipe, show that approximately 50 such systems are needed to cover Ny-Ålesund’s heating demand. The simulations also show how a geothermal system will influence the temperature distribution around the geothermal pipe, how the geothermal system influences the permafrost depth, and how the groundwater flow effects the ground temperature.
ForlagUiT The Arctic University of Norway
UiT Norges arktiske universitet
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