Bjørn Frengstad
Om
Bakgrunn og interesser
Min forskning og prosjekterfaring er innenfor et relativt bredt område av anvendt geologi, herunder:
- Hydrogeologi i løsmasser og fjell
- Kvartærgeologi på land og på sokkelen, samt på Svalbard
- Miljøgeokjemisk kartlegging av jord og grunnvann i regional og lokal skala.
- Grunnvarme
- Grunnvann til vannforsyning, mineralvann og energiformål
- Vurdering av grunnvannskvalitet, inkludert sporelementer og radioaktive grunnstoffer
- Baseline-studier, lange overvåkningsserier og statistisk analyse
- Geokjemiske prosesser i jord og grunnvann
- Stabilitet av løsmasseskråninger
Jeg har jobbet 19 år som forsker ved Norges geologiske undersøkelse derav fem år som leder av Grunnvannslaget. Fra 1990 til 1995 var jeg vitenskapelig assistent og amanuensis ved NTH og 1998-2001 var jeg stipendiat ved NTNU. Høsten 2017 ble jeg tilsatt her som professor i ingeniørgeologi løsmasser og siden 2020 har jeg hatt ansvaret for hydrogeologi.
Undervisning – emner 2022/23
TGB4185 Ingeniørgeologi grunnkurs. Emneansvarlig, underviser løsmassedelen med Ola Fredin
TBM4240 Geoteknikk. Underviser geologidelen
TGB4575 Ingeniørgeologi fordypningsemne. Feltundervisning løsmassedelen.
TGB4200 Ingeniørgeologi løsmasser videregående kurs. Underviser deler av kurset
TGB4855 Eksperter i Team. Landsbyleder: "Energilagring i grunnen"
TGB4205 Hydrogeologi. Emneansvarlig.
TGB4570 Ingeniørgeologi. Fordypningsprosjekt. Emneansvarlig.
TGB4945 Ingeniørgeologi. Masteroppgave. Emneansvarlig.
PhD-studenter
2008 - 2012 Heiko Liebel (medveileder)
2015 - 2021 Sondre Gjengedal (medveileder)
2018 - 2023 Lars Aaberg Stenvik (hovedveileder)
2021 - Christian Rekve Bryn (hovedveileder)
Forskningsprosjekter
EnerGizerS (CO2-Enhanced Geothermal Systems for Climate Neutral Energy Supply) https://pet.geo.ntnu.no/wordpress/igp/nb/tag/energizers/
ORMEL 2 (Optimal ressursutnyttelse av grunnvann til oppvarming og kjøling i Melhus kommune) https://www.vvsaktuelt.no/ormel-prosjektet-95881/nyhet.html
Bømoen plussbygd https://www.cowi.no/om-cowi/nyheter-og-presse/dette-kan-bli-norges-foerste-plussbygd
Publikasjoner
2022
-
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.
volum 100.
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.
volum 81 (4).
Vitenskapelig artikkel
2021
-
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.
volum 80.
Vitenskapelig artikkel
-
Sowizdzal, Anna;
Gladysz, Pawel;
Andresen, Trond;
Miecznik, Maciej;
Frengstad, Bjørn S.;
Liszka, Marcin;
Chmielowska, Anna;
Gawron, Marcel;
Løvseth, Sigurd Weidemann;
Pajak, Leszek;
Stenvik, Lars Aaberg;
Tomaszewska, Barbara.
(2021)
CO2-enhanced geothermal systems for climate neutral energy supply.
TCCS–11. CO2 Capture, Transport and Storage. Trondheim 22nd–23rd June 2021. Short Papers from the 11th International Trondheim CCS Conference.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2020
-
Gjengedal, Sondre;
Brøtan, Vegard;
Buset, Ole Tore;
Larsen, Erik;
Åsebø Berg, Olav;
Torsæter, Ole;
Ramstad, Randi Kalskin;
Hilmo, Bernt Olav;
Frengstad, Bjørn.
(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.
volum 134.
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.
volum 79.
Vitenskapelig artikkel
2019
-
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.
volum 12 (19).
Vitenskapelig artikkel
-
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.
volum 2019:4961781.
Vitenskapelig oversiktsartikkel/review
2017
-
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
-
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.
volum 178-179.
Vitenskapelig artikkel
2014
-
Frengstad, Bjørn S.;
Banks, David.
(2014)
Uranium distribution in groundwater from fractured crystalline aquifers in Norway.
Fractured Rock Hydrogeology.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2012
-
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.
volum 71 (3).
Vitenskapelig artikkel
-
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.
volum 71 (2).
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.
volum 99 (1).
Vitenskapelig artikkel
2010
-
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
-
Karnachuk, Olga V.;
Gerasimchuk, A.L.;
Banks, David;
Frengstad, Bjørn S.;
Stykon, G.A.;
Tikhonova, Z.L.;
Kaksonen, A.;
Puhakka, J.;
Yanenko, A.S.;
Pimenov, N.V..
(2009)
Bacteria of the sulfur cycle in the sediments of gold mine tailings, Kuznetsk Basin, Russia.
Microbiology.
volum 78 (4).
Vitenskapelig artikkel
2008
-
Frengstad, Bjørn S.;
Banks, David.
(2008)
The Natural Inorganic Chemical Quality of Crystalline Bedrock Groundwaters of Norway.
Natural Groundwater Quality.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2007
-
Frengstad, Bjørn S.;
Banks, David.
(2007)
Universal controls on the evolution of groundwater chemistry in crystalline bedrock: the evidence from empirical and theoretical studies.
Groundwater in fractured rocks. Selected papers from Groundwater in Fractured Rocks International Conference, Prague. IAH selected papers Vol. 9.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
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.
volum 374 (2-3).
Vitenskapelig artikkel
2006
-
Banks, David;
Frengstad, Bjørn S..
(2006)
Evolution of groundwater chemical composition by plagioclase hydrolysis in Norwegian anorthosites.
Geochimica et Cosmochimica Acta.
volum 70 (6).
Vitenskapelig artikkel
2002
-
Frengstad, Bjørn.
(2002)
Groundwater quality of crystalline bedrock aquifers in Norway.
2002. ISBN 82-471-5449-8.
Doktorgradsavhandling
-
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.
volum 16 (2).
Vitenskapelig artikkel
2001
-
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
-
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.
volum 79 (2).
Vitenskapelig artikkel
1998
-
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, 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
Tidsskriftspublikasjoner
-
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.
volum 100.
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.
volum 81 (4).
Vitenskapelig artikkel
-
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.
volum 80.
Vitenskapelig artikkel
-
Gjengedal, Sondre;
Brøtan, Vegard;
Buset, Ole Tore;
Larsen, Erik;
Åsebø Berg, Olav;
Torsæter, Ole;
Ramstad, Randi Kalskin;
Hilmo, Bernt Olav;
Frengstad, Bjørn.
(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.
volum 134.
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.
volum 79.
Vitenskapelig artikkel
-
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.
volum 12 (19).
Vitenskapelig artikkel
-
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.
volum 2019:4961781.
Vitenskapelig oversiktsartikkel/review
-
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
-
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.
volum 178-179.
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.
volum 71 (3).
Vitenskapelig artikkel
-
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.
volum 71 (2).
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.
volum 99 (1).
Vitenskapelig artikkel
-
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
-
Karnachuk, Olga V.;
Gerasimchuk, A.L.;
Banks, David;
Frengstad, Bjørn S.;
Stykon, G.A.;
Tikhonova, Z.L.;
Kaksonen, A.;
Puhakka, J.;
Yanenko, A.S.;
Pimenov, N.V..
(2009)
Bacteria of the sulfur cycle in the sediments of gold mine tailings, Kuznetsk Basin, Russia.
Microbiology.
volum 78 (4).
Vitenskapelig artikkel
-
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.
volum 374 (2-3).
Vitenskapelig artikkel
-
Banks, David;
Frengstad, Bjørn S..
(2006)
Evolution of groundwater chemical composition by plagioclase hydrolysis in Norwegian anorthosites.
Geochimica et Cosmochimica Acta.
volum 70 (6).
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.
volum 16 (2).
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
-
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
-
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.
volum 79 (2).
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, 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
Del av bok/rapport
-
Sowizdzal, Anna;
Gladysz, Pawel;
Andresen, Trond;
Miecznik, Maciej;
Frengstad, Bjørn S.;
Liszka, Marcin;
Chmielowska, Anna;
Gawron, Marcel;
Løvseth, Sigurd Weidemann;
Pajak, Leszek;
Stenvik, Lars Aaberg;
Tomaszewska, Barbara.
(2021)
CO2-enhanced geothermal systems for climate neutral energy supply.
TCCS–11. CO2 Capture, Transport and Storage. Trondheim 22nd–23rd June 2021. Short Papers from the 11th International Trondheim CCS Conference.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Frengstad, Bjørn S.;
Banks, David.
(2014)
Uranium distribution in groundwater from fractured crystalline aquifers in Norway.
Fractured Rock Hydrogeology.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Frengstad, Bjørn S.;
Banks, David.
(2008)
The Natural Inorganic Chemical Quality of Crystalline Bedrock Groundwaters of Norway.
Natural Groundwater Quality.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Frengstad, Bjørn S.;
Banks, David.
(2007)
Universal controls on the evolution of groundwater chemistry in crystalline bedrock: the evidence from empirical and theoretical studies.
Groundwater in fractured rocks. Selected papers from Groundwater in Fractured Rocks International Conference, Prague. IAH selected papers Vol. 9.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Rapport
-
Frengstad, Bjørn.
(2002)
Groundwater quality of crystalline bedrock aquifers in Norway.
2002. ISBN 82-471-5449-8.
Doktorgradsavhandling
Undervisning
Emner
- TGB4575 - Ingeniørgeologi, fordypningsemne
- TGB4200 - Ingeniørgeologi - Løsmasser, videregående kurs
- TGB4185 - Ingeniørgeologi, grunnkurs
- GEOL3093 - Spesialpensum til masteroppgaven/særpensum
- GEOL3092 - Spesialpensum til masteroppgaven/særpensum
- TGB4580 - Mineralproduksjon og teknisk ressursgeologi, fordypningsprosjekt
- TGB4570 - Ingeniørgeologi, fordypningsprosjekt
- TGB4945 - Ingeniørgeologi, masteroppgave
- BYGT2316 - Ingeniørgeologi - berg
- TGB4205 - Hydrogeologi
Formidling
2021
-
Vitenskapelig foredragStenvik, Lars Aaberg; Frengstad, Bjørn S.; Gjengedal, Sondre; Ramstad, Randi Kalskin. (2021) Diagnosing Encrustation Problems in Open-loop Groundwater Heat Pump Systems in Melhus, Norway. World Geothermal Congress 2020+1 Reykjavik . International Geothermal Association; Reykjavik. 2021-03-01 - 2021-10-27.
2019
-
Vitenskapelig foredragStenvik, Lars Aaberg; Gjengedal, Sondre; Frengstad, Bjørn S.; Ramstad, Randi Kalskin. (2019) Application of a flow-through cell to monitor groundwater source heat pump systems in Melhus, Norway. 46th IAH Congress: Groundwater management and governance – coping with water scarcity . International Assocation of Hydrogeologists; Malaga. 2019-09-22 - 2019-09-27.
-
Populærvitenskapelig foredragStenvik, Lars Aaberg; Gjengedal, Sondre; Frengstad, Bjørn S.; Ramstad, Randi Kalskin. (2019) Groundwater source heat pumps systems: Principles and challenges. Clean Energy Symposium . NTNU Young Researcher Clean Energy Forum; Trondheim. 2019-02-08 - 2019-02-08.
-
Vitenskapelig foredragStenvik, Lars Aaberg; Gjengedal, Sondre; Frengstad, Bjørn S.; Ramstad, Randi Kalskin. (2019) ORMEL 2: Iron and manganese encrustations in open-loop ground source heat pump systems. Vinterkonferansen 2019 . Norsk Geologisk Forening; Bergen. 2019-01-07 - 2019-01-09.
2010
-
Vitenskapelig foredragLiebel, Heiko Tobias; Huber, Kilian; Ramstad, Randi kalskin; Brattli, Bjørge; Frengstad, Bjørn. (2010) Can rock core thermal conductivity data replace thermal response tests?. Water and Energy 2010 . International Water Association (IWA); Amsterdam. 2010-11-10 - 2010-11-12.