Blar i NTNU Open på forfatter "Gjengedal, Sondre"
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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 ... -
En evaluering av empiriske formler som relaterer kornfordeling til hydraulisk konduktivitet og deres egnethet til bruk i fluviale og glasifluviale sedimenter
Tømmerdal, Håvard Marius (Master thesis, 2017)«En evaluering av empiriske formler som relaterer kornfordeling til hydraulisk konduktivitet og deres egnethet til bruk i fluviale og glasifluviale sedimenter» er en masteroppgave skrevet av Håvard Tømmerdal våren 2017. ... -
Fluid flow through 3D-printed particle beds: a new technique for understanding, validating, and improving predictability of permeability from empirical equations
Gjengedal, Sondre; Brøtan, Vegard; Buset, Ole Tore; Larsen, Erik; Åsebø Berg, Olav; Torsæter, Ole; Ramstad, Randi Kalskin; Hilmo, Bernt Olav; Frengstad, Bjørn (Peer reviewed; Journal article, 2020)The application of 3D technology for fabrication of artificial porous media samples improves porous media flow studies. The geometrical characteristics of a porous media pore channel: the channel shape, size, porosity, ... -
Fouling and clogging surveillance in open loop GSHP systems: A systematic procedure for fouling and clogging detection in the whole groundwater circuit
Gjengedal, Sondre; Ramstad, Randi Kalskin; Hilmo, Bernt Olav; Frengstad, Bjørn S. (Journal article; Peer reviewed, 2020)Fouling and clogging are some of the major water quality problems encountered in open loop ground source heat pump (GSHP) systems and aquifer thermal energy storage (ATES) systems. Here we present a surveillance strategy ... -
Groundwater heat pump systems. New insights on system design and on fluid flow in unconsolidated aquifers
Gjengedal, Sondre (Doctoral theses at NTNU;2021:336, Doctoral thesis, 2021)This PhD thesis concerns groundwater heat pump (GWHP) systems in Norway, which are systems that utilize groundwater as a source of thermal energy for heating and cooling applications in buildings. GWHP systems can typically ... -
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 ... -
Ladningsberegning basert på frekvensveide vibrasjonskrav
Gjengedal, Sondre (Master thesis, 2013)Den Norske Standarden, NS8141-01:2012 Vibrasjoner og støt ? Veiledende grenseverdier for bygge- og anleggsvirksomheten, bergverk og trafikk, har nylig gjennomgått en større revisjon hvor de veiledende grenseverdiene for ... -
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 ... -
Validity of the NTNU Prediction Model for D&B Tunnelling
Jakobsen, Pål Drevland; Grøv, Eivind; Bruland, Amund; Gjengedal, Sondre (Peer reviewed; Journal article, 2023)The Norwegian University of Science and Technology (NTNU) has since the early 1970s published prediction models for estimated production rates, time consumption, and costs for rock works. Since the early development of the ... -
Vann- og varmetransport i grunnvannsakviferen i Melhus sentrum - konseptuell vurdering.
Flugsrud, Inger Strøm (Master thesis, 2017)Vann- og varmetransport i grunnvannsakviferen i Melhus sentrum konseptuell vurdering er en masteroppgave skrevet av Inger Strøm Flugsrud høsten 2017. Arbeidet er gjort i forbindelse med emnet TGB4935 Miljø- og hydrogeologi, ... -
Vannkvalitet knyttet til grunnvannsbaserte grunnvarmeanlegg i Melhus og Elverum
Brøste, Heidi Marstein (Master thesis, 2017)Gjennom forskningsprosjektet ORMEL (Optimal ressursutnyttelse av grunnvann til oppvarming og kjøling i Melhus og Elverum) skal bruken av grunnvann som varmekilde i Melhus og Elverum optimaliseres. Dårlig vannkvalitet kan ...