Low temperature deicing of road infrastructure using renewable energy

Winter road maintenance is costly but it is inevitable since it is necessary to keep roads accessible and safe during winter. Current winter road maintenance methods use annually 600 000 tons of salt, in the Nordic countries. The salt ends up in the environment along the roads and results in environmental challenges. This thesis proposes an alternative, winter road maintenance concept for critical parts of the road infrastructure. The proposed concept consists of a hydronic heated pavement (HHP), utilised as pavement solar collector (PSC), which is connected to a borehole thermal energy storage (BTES). The combination of an HHP and a BTES means that the solar radiation will be harvested in the summer time and the stored energy will be used for winter road maintenance. This system can be installed at critical parts of a road infrastructure. In existing hydronic pavements district heating or other high temperature energy sources are currently used, however, high temperature energy sources limit the implementation of HHP systems. Research on using low temperature energy sources can result in a reduction of primary energy need and makes implementation of HHP systems more feasible. The purpose of this thesis is to investigate the feasibility of implementing hydronic heated pavements using renewable energy, in the Scandinavian countries. This dissertation presents the experimental and numerical results from a field station of BTES connected HHP system. The field station was constructed during 2017 and experiments on harvesting were conducted during the summer of 2018. The anti-icing and de-icing function of the HHP system were studied during the winter of 2018/2019.

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01751390
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • ISBN: 9789179051686
  • Files: ITRD, VTI
  • Created Date: Sep 8 2020 2:37PM