2024

• Miecznik, Maciej; Tyszer, Magdalena; Sowizdzal, Anna; Andresen, Trond; Frengstad, Bjørn S.; Stenvik, Lars Aaberg. (2024) Numerical modeling of a potential CO2-supplied enhanced geothermal system (CO2-EGS) in the Åsgard field, Norway. Geology, Geophysics and Environment
  Vitenskapelig artikkel

2023

• Frengstad, Bjørn Syvert. (2023) Innspill til Flaum og Skredmeldinga.
  Faglig kapittel

2022

• Stenvik, Lars Aaberg; Ramstad, Randi Kalskin; Frengstad, Bjørn S.. (2022) Optimizing submersible pump regulation of a clogging prone groundwater heat pump system in Melhus, Norway. Science and Technology for the Built Environment
  Vitenskapelig artikkel
• Stenvik, Lars Aaberg; Hilmo, Bernt Olav; Frengstad, Bjørn S.. (2022) Elevated manganese concentrations in groundwater wells after longtime abstraction with bank filtration: developing and testing of a sorption model for Ringerike waterworks, Norway. Hydrogeology Journal
  Vitenskapelig artikkel
• Stenvik, Lars Aaberg; Gjengedal, Sondre; Ramstad, Randi Kalskin; Frengstad, Bjørn. (2022) Hydrochemical and biotic control on iron incrustations in groundwater heat pump systems: Case study from a saline, anoxic aquifer in Melhus, Norway. Geothermics
  Vitenskapelig artikkel
• Stenvik, Lars Aaberg; Gjengedal, Sondre; Ramstad, Randi Kalskin; Frengstad, Bjørn S.. (2022) How to avoid gas clogging in groundwater heat pump systems: a case study from the Lena terrasse system in Melhus, Norway. Bulletin of Engineering Geology and the Environment
  Vitenskapelig artikkel

2021

• Larsen, H.B.; Piciullo, Luca; Frengstad, Bjørn S.; Schilirò, Luca. (2021) Physically Based Modelling of Shallow Landslides with “TRIGRS”. A Review of Applications and an Implementation in the Case Study of Jølster 2019. NTNU
  Mastergradsoppgave
• Pajak, Leszek; Sowiżdżał, Anna; Gładysz, Paweł; Tomaszewska, Barbara; Miecznik, Maciej; Andresen, Trond. (2021) Multi-criteria studies and assessment supporting the selection of locations and technologies used in co2-egs systems. Energies
  Vitenskapelig artikkel
• Sowizdzal, Anna; Gladysz, Pawel; Andresen, Trond; Miecznik, Maciej; Frengstad, Bjørn S.; Liszka, Marcin. (2021) CO2-enhanced geothermal systems for climate neutral energy supply. SINTEF akademisk forlag
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Gjengedal, Sondre; Stenvik, Lars Aaberg; Ramstad, Randi Kalskin; Ulfsnes, Jan Ivar; Hilmo, Bernt Olav; Frengstad, Bjørn S.. (2021) Online remote-controlled and cost-effective fouling and clogging surveillance of a groundwater heat pump system. Bulletin of Engineering Geology and the Environment
  Vitenskapelig artikkel

2020

• Gjengedal, Sondre; Brøtan, Vegard; Buset, Ole Tore; Larsen, Erik; Åsebø Berg, Olav; Torsæter, Ole. (2020) Fluid flow through 3D-printed particle beds: a new technique for understanding, validating, and improving predictability of permeability from empirical equations. Transport in Porous Media
  Vitenskapelig artikkel
• Gjengedal, Sondre; Ramstad, Randi Kalskin; Hilmo, Bernt Olav; Frengstad, Bjørn S.. (2020) Fouling and clogging surveillance in open loop GSHP systems: A systematic procedure for fouling and clogging detection in the whole groundwater circuit. Bulletin of Engineering Geology and the Environment
  Vitenskapelig artikkel

2019

• Skarphagen, Helge; Banks, David; Frengstad, Bjørn S.; Gether, Harald. (2019) Design considerations for borehole thermal energy storage (BTES): A review with emphasis on convective heat transfer. Geofluids
  Vitenskapelig oversiktsartikkel/review
• Gjengedal, Sondre; Stenvik, Lars Aaberg; Storli, Pål-Tore Selbo; Ramstad, Randi Kalskin; Hilmo, Bernt Olav; Frengstad, Bjørn S.. (2019) Design of Groundwater Heat Pump Systems. Principles, Tools, and Strategies for Controlling Gas and Precipitation Problems. Energies
  Vitenskapelig artikkel

2018

• Frengstad, Bjørn S.; Hauge, Emilie Olsen. (2018) The Influence of Water Content and Mineralogy on the Shear Strength of two Petrographically Contrasting Norwegian Tills. Norwegian University of Science and Technology
  Mastergradsoppgave

2017

• Dutova, Ekaterina M.; Nikitenkov, Aleksei N.; Pokrovskiy, Vitaly D.; Banks, David; Frengstad, Bjørn; Parnachev, Valerii P.. (2017) Modelling of the dissolution and reprecipitation of uranium under oxidising conditions in the zone of shallow groundwater circulation. Journal of Environmental Radioactivity
  Vitenskapelig artikkel
• Bottrell, Simon; Hipkins, Emma V.; Lane, James M.; Zegos, Rose A.; Banks, David; Frengstad, Bjørn. (2017) Carbon-13 in groundwater from English and Norwegian crystalline rock aquifers: a tool for deducing the origin of alkalinity?. Sustainable Water Resources Management
  Vitenskapelig artikkel

2014

• Frengstad, Bjørn S.; Banks, David. (2014) Uranium distribution in groundwater from fractured crystalline aquifers in Norway. CRC Press
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

2012

• Liebel, Heiko Tobias; Stølen, Marie Sigmundsdatter; Frengstad, Bjørn Syvert; Ramstad, Randi kalskin; Brattli, Bjørge. (2012) Insights into the reliability of different thermal conductivity measurement techniques: a thermo-geological study in Mære (Norway). Bulletin of Engineering Geology and the Environment
  Vitenskapelig artikkel
• Liebel, Heiko Tobias; Huber, Kilian; Frengstad, Bjørn Syvert; Ramstad, Randi kalskin; Brattli, Bjørge. (2012) Thermal response testing of a fractured hard rock aquifer with and without induced groundwater flow. Bulletin of Engineering Geology and the Environment
  Vitenskapelig artikkel
• Liebel, Heiko; de Beer, Johannes; Frengstad, Bjørn; Kalskin Ramstad, Randi; Brattli, Bjørge. (2012) Effect of water yield and rock thermal conductivities on TRT results. Comunicações Geológicas
  Vitenskapelig artikkel

2011

• Liebel, Heiko Tobias; Huber, Kilian; Frengstad, Bjørn Syvert; Ramstad, Randi kalskin; Brattli, Bjørge. (2011) Temperature footprint of a thermal response test can help to reveal thermogeological information. Bulletin. Norges geologiske undersøkelse (NGU-Bulletin)
  Vitenskapelig artikkel

2010

• Liebel, Heiko; Huber, K.; Frengstad, Bjørn Syvert; Ramstad, Randi kalskin; Brattli, Bjørge. (2010) Rock core samples cannot replace thermal response tests : a statistical comparison based on thermal conductivity data from the Oslo Region (Norway). Tapir Akademisk Forlag
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
• Frengstad, Bjørn S.; Lax, Kaj; Tarvainen, Timo; Jæger, Øystein; Wigum, Børge Johannes. (2010) The chemistry of bottled mineral and spring waters from Norway, Sweden, Finland and Iceland. Journal of Geochemical Exploration
  Vitenskapelig artikkel

2009

• Liebel, Heiko; Brattli, Bjørge; Huber, Kilian; Frengstad, Bjørn; Ramstad, Randi Kalskin. (2009) Thermogeology in the Oslo region and Kristiansand - Results from thermal response tests (TRT) with and without artificially induced groundwater flow. Norges geologiske undersøkelse (NGU)
  Rapport
• Karnachuk, Olga V.; Gerasimchuk, A.L.; Banks, David; Frengstad, Bjørn S.; Stykon, G.A.; Tikhonova, Z.L.. (2009) Bacteria of the sulfur cycle in the sediments of gold mine tailings, Kuznetsk Basin, Russia. Microbiology
  Vitenskapelig artikkel

2008

• Liebel, Heiko; Frengstad, Bjørn; Ramstad, Randi; Brattli, Bj�rge. (2008) Low enthalpy geothermal energy in fractured rock aquifers. 33rd International Geological Congress, Abstracts
  Sammendrag/abstract
• Frengstad, Bjørn S.; Banks, David. (2008) The Natural Inorganic Chemical Quality of Crystalline Bedrock Groundwaters of Norway. Blackwell Publishing
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

2007

• Reimann, Clemens; Grimstvedt, Andreas Magnar; Frengstad, Bjørn S.; Finne, Tor Erik. (2007) White HDPE bottles as source of serious contamination of water samples with Ba and Zn. Science of the Total Environment
  Vitenskapelig artikkel
• Frengstad, Bjørn S.; Banks, David. (2007) Universal controls on the evolution of groundwater chemistry in crystalline bedrock: the evidence from empirical and theoretical studies. Balkema
  Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

2006

• Banks, David; Frengstad, Bjørn S.. (2006) Evolution of groundwater chemical composition by plagioclase hydrolysis in Norwegian anorthosites. Geochimica et Cosmochimica Acta
  Vitenskapelig artikkel

2003

• Reimann, Clemens; Bjorvatn, Kjell; Frengstad, Bjørn; Melaku, Zenebe; Tekle-Haimanot, Redda; Siewers, Ulrich. (2003) Drinking water quality in the Ethiopian section of the East African Rift Valley I-Date and health aspects. Science of the Total Environment
  Vitenskapelig artikkel

2002

• Frengstad, Bjørn; Banks, David; Midtgård Skrede, Aase; Krogh, Jan Reidar; Siewers, Ulrich; Strand, Terje. (2002) The hydrochemistry of crystaline bedrock groundwater in Norway. NGU-Bulletin
  Vitenskapelig artikkel
• Banks, David; Karnachuk, Olga V.; Parnachov, Valerij P.; Holden, Wayne; Frengstad, Bjørn Syvert. (2002) Rural pit latrines as a source of groundwater contamination; examples from Siberia and Kosova. Water and Environment Journal
  Vitenskapelig artikkel
• Banks, David; Parnachov, Valerij P.; Frengstad, Bjørn; Holden, Wayne; Vedernikov, Anatoly A.; Karnachuk, Olga V.. (2002) Alkaline mine drainage from metal sulphide and coal mines: examples from Svalbard and Siberia. Geological Society Special Publication
  Vitenskapelig artikkel
• Shand, Paul; Frengstad, Bjørn. (2002) Baseline groundwater quality. A comparison of Selected British and Norwegian Aquifers. Groundwater Systems and Water Quality Programme Internal Report (IR/01/177)
  Rapport
• Frengstad, Bjørn. (2002) Groundwater quality of crystalline bedrock aquifers in Norway. Department of Geology and Mineral Resources Engineering, NTNU
  Doktorgradsavhandling

2001

• Reimann, Clemens; Koller, Friedrich; Frengstad, Bjørn; Kashulina, Galina; Niskavaara, Heikki; Englmaier, Peter. (2001) Comparison of the element composition in several plant species and their substrate from a 1 500 000-km2 area in Northern Europe. The Science of the Total Envinronment
  Vitenskapelig artikkel
• Frengstad, Bjørn; Banks, David; Siewers, Ulrich. (2001) The chemistry of Norwegian groundwaters: IV. The pH-dependence of element concentrations in crystalline bedrock groundwaters. The Science of the Total Envinronment
  Vitenskapelig artikkel

2000

• Banks, David; Frengstad, Bjørn; Skrede, Aase Kjersti; Krog, Jan Reidar; Strand, Terje; Siewers, Ulrich. (2000) Grunnvann - ikke bare vann. Gråsteinen : et geofaglig tidsskrift for alle
  Vitenskapelig artikkel
• Frengstad, Bjørn; Midtgård Skrede, Aase Kjersti; Banks, David; Krog, Jan Reidar; Siewers, Ulrich. (2000) The Chemistry of Norwegian Groundwaters III. The Distribution of Trace Elements in 476 Crystalline Bedrock Groundwaters, as Analysed by ICP-MS Techniques. Science of the Total Environment
  Vitenskapelig artikkel

1999

• Misund, Arve; Frengstad, Bjørn; Siewers, Ulrich; Reimann, Clemens. (1999) Variation of 66 elements in European bottled mineral waters. Science of the Total Environment
  Vitenskapelig artikkel
• Rokoengen, Kåre; Frengstad, Bjørn. (1999) Radiocarbon and seismic evidence of ice sheet extent and the last deglaciation on the mid-Norwegian continental shelf. Norsk Geologisk Tidsskrift
  Vitenskapelig artikkel

1998

• Banks, David; Frengstad, Bjørn; Krog, J.R.; Midtgård Skrede, Aase; Strand, Terje; Lind, Bjørn. (1998) Chenmical quality of Norwegian bedrock groundwaters. NGU-rapport (98.058)
  Rapport
• Banks, David; Frengstad, Bjørn; Krog, J.R.; Midtgård Skrede, Aase; Strand, Terje; Lind, Bjørn. (1998) Chemical Quality of Groundwaters from Quaternary Sedimentary Aquifers. NGU-rapport (98.089)
  Rapport
• Midtgård, Aase Kjersti; Frengstad, Bjørn; Banks, David; Krog, Jan Reidar; Strand, Terje; Siewers, Ulrich. (1998) Drinking water from crystalline bedrock aquifers - not just H2O. Mineralogical Society Bulletin
  Vitenskapelig artikkel
• Banks, David; Midtgård, Aase Kjersti; Frengstad, Bjørn; Krog, Jan Reidar; Strand, Terje. (1998) The chemistry of Norwegian groundwaters. II. The chemistry of 72 groundwaters from Quaternary sedimentary aquifers. The Science of the Total Envinronment
  Vitenskapelig artikkel
• Banks, David; Frengstad, Bjørn; Midtgård, Aase Kjersti; Krog, Jan Reidar; Strand, Terje. (1998) The chemistry of Norwegian groundwaters: I. The distribution of radon, major and minor elements in 1604 crystalline bedrock groundwaters. The Science of the Total Envinronment
  Vitenskapelig artikkel
• Banks, David; Midtgård Skrede, Aase; Frengstad, Bjørn; Krog, J.R.; Strand, Terje; Lind, Bjørn. (1998) Utjevningsbassengs innvirkning på radoninnholdet i grunnvann fra fast fjell. NGU-rapport (98.097)
  Rapport