Blar i NTNU Open på forfatter "Stenvik, Lars Aaberg"
-
Bruk av temperaturmålinger til kartlegging av grunnvannsstrømning - Test og metodeutvikling med data fra Åknes
Stenvik, Lars Aaberg (Master thesis, 2018)Denne masteroppgaven er en del av Norges vassdrags- og energidirektorats dreneringsprosjekt tilknyttet det ustabile fjellpartiet på Åknes. Målsetning med arbeidet var kartlegging av vannførende sprekker og grunnvannsbevegelsen ... -
Design of Groundwater Heat Pump Systems. Principles, Tools, and Strategies for Controlling Gas and Precipitation Problems
Gjengedal, Sondre; Stenvik, Lars Aaberg; Storli, Pål-Tore Selbo; Ramstad, Randi Kalskin; Hilmo, Bernt Olav; Frengstad, Bjørn S. (Journal article; Peer reviewed, 2019)The utilization of groundwater heat pump systems is increasing in Norway, which are currently widely employed for heating and cooling applications in the town center of Melhus. The investigations of the Melhus installations ... -
How to avoid gas clogging in groundwater heat pump systems: a case study from the Lena terrasse system in Melhus, Norway
Stenvik, Lars Aaberg; Gjengedal, Sondre; Ramstad, Randi Kalskin; Frengstad, Bjørn S. (Peer reviewed; Journal article, 2022)Vacuum pressures are unfavorable in water pipes since they pose a risk to degassing dissolved gases from the water and air in-leakage. If the water flow rate through the pipeline is too low, gas bubbles will rise to local ... -
Hydrochemical and biotic control on iron incrustations in groundwater heat pump systems: Case study from a saline, anoxic aquifer in Melhus, Norway
Stenvik, Lars Aaberg; Gjengedal, Sondre; Ramstad, Randi Kalskin; Frengstad, Bjørn (Peer reviewed; Journal article, 2022)Clogging by incrustations of nine groundwater heat pump (GWHP) systems in Melhus, Norway have been investigated by field and laboratory methods for water quality and incrustation composition. Iron oxides incrust systems ... -
Numerical modeling of a potential CO2-supplied enhanced geothermal system (CO2-EGS) in the Åsgard field, Norway
Miecznik, Maciej; Tyszer, Magdalena; Sowizdzal, Anna; Andresen, Trond; Frengstad, Bjørn S.; Stenvik, Lars Aaberg; Pierzchala, Karol; Gladysz, Pawel (Journal article, 2024)The principle of Enhanced Geothermal System (EGS) technology is that water injected at a sufficiently high pressure will lead to the fracturing of naturally impermeable rocks, and as a result, this will create hydraulic ... -
Online remote-controlled and cost-effective fouling and clogging surveillance of a groundwater heat pump system
Gjengedal, Sondre; Stenvik, Lars Aaberg; Ramstad, Randi Kalskin; Ulfsnes, Jan Ivar; Hilmo, Bernt Olav; Frengstad, Bjørn S. (Peer reviewed; Journal article, 2021)Fouling and clogging of groundwater wells and heat exchangers are among the major operational challenges for groundwater heat pump (GWHP) and aquifer thermal energy storage (ATES) systems. This article presents the application ... -
Pumping iron and manganese: Geochemistry and engineering of groundwater well systems with challenging redox conditions
Stenvik, Lars Aaberg (Doctoral theses at NTNU;2023:58, Doctoral thesis, 2023)Wells facilitate extraction and injection of groundwater, both for heating/cooling and drinking water purposes. Their ability to supply groundwater of sufficient quantity and quality may be impeded with time. To a large ...