Modelling of Borehole Solar Energy Storage Concept in High Latitudes

Topias Siren, Mateusz Janiszewski, Lauri Kalle Tapio Uotinen, Harm Oosterbaan

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

1 Citation (Scopus)
13 Downloads (Pure)

Abstract

Globally there is an increasing pressure to reduce the greenhouse gas emissions and increase the use of renewable sources of energy. The storage of solar heat is a crucial aspect for implementing the solar energy for heating purposes especially in high latitudes, as it is the case in Finland, with sun insolation high in summer and almost negligible in winter when the domestic heating demand is high. To use the solar heating during winter thermal energy storages are required. In this paper, equations representing the single U-tube heat exchanger are implemented in weak form edge elements in COMSOL Multiphysics to dramatically speed up the calculation process for modelling of a borehole storage layout. Borehole seasonal solar heat storage of 6425 m3 volume with 64 boreholes is successfully simulated. After 10 years of operation the simulated borehole pattern recovers 62.8% of the stored seasonal thermal energy and provides 380 MWh of thermal energy for heating in winter.
Original languageEnglish
Title of host publication 2017 YSRM Young Scholars' Symposium on Rock Mechanics
Subtitle of host publicationProceedings of
Place of PublicationKorea
Pages369-372
Number of pages4
ISBN (Electronic)9791156103158
Publication statusPublished - 11 May 2017
MoE publication typeA4 Article in a conference publication
EventYoung Scholars' Symposium on Rock Mechanics - Jeju, Korea, Republic of
Duration: 10 May 201713 May 2017
Conference number: 4

Conference

ConferenceYoung Scholars' Symposium on Rock Mechanics
Abbreviated titleYSRM
CountryKorea, Republic of
CityJeju
Period10/05/201713/05/2017

Keywords

  • COMSOL
  • Numerical modelling
  • Seasonal storage
  • Solar energy
  • Weak form

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