Longevity and power density of intermediate-to-deep geothermal wells in district heating applications
Department of Applied Physics, Aalto University, P.O. Box 11100, 00076, AALTO, Finland
2 The University of Western Australia, 35 Stirling Highway, 6009, Crawley, WA, Australia
3 Department of Aerospace, Physics and Space Sciences, Florida Institute of Technology, 32901, Melbourne, FL, USA
Accepted: 8 January 2021
Published online: 25 January 2021
This paper assesses the potential of intermediate-to-deep geothermal wells for district heating purposes in non-hot spot regions as a means for replacing carbon-intensive heat sources. In analysing the problem of heat transfer from the bedrock to a flowing coolant in the well, we perform parameter scans to assess the longevity and power density of different-size wells and derive analytical estimates to explain salient characteristics of the well behaviour. The results are then utilized to illustrate how intermediate-to-deep geothermal wells would compare with the requirements of typical large-scale district heating systems, by using the city of Helsinki in Finland as an example.
© The Author(s) 2021
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