Blar i Institutt for energi og prosessteknikk på tittel
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Two-Phase pipeflow simulations with OpenFoam
(Master thesis, 2013)The main purpose of this thesis is to develop two-phase simulations using OpenFOAM. Two different situations are studied: open and closed channel flow. Different parameters are changed in each case to obtain different ... -
Two-stage evaporator for R744 heat pumps using greywater as heat source
(Peer reviewed; Journal article, 2023)Heat pumps are pinpointed as a key technology in decarbonizing buildings' heat supply, which is currently dominated by fossil-fuel based systems. To minimize the environmental impact of heat pumps over their lifetime, ... -
Two-way coupled fluid-structure interaction of gas-liquid slug flow in a flexible riser: Small-scale experiments and simulations
(Journal article; Peer reviewed, 2019)Flexible risers might be subjected to large pressure and density fluctuations when transporting multiphase mixtures as different flow patterns may take place. Those fluctuations might induce large forces on the structure, ... -
Two-way coupled simulation of the Francis-99 hydrofoil using model order reduction
(Journal article; Peer reviewed, 2019)The Francis-99 hydrofoil is simulated using a quasi two-way Fluid-Structure Interaction procedure. The structural domain is reduced by the use of modal decomposition, and solved for inside the commercial fluid solver ANSYS ... -
Typologier for norske boligbygg - Eksempler på tiltak for energieffektivisering
(Research report, 2016)Denne rapporten presenterer en såkalt typologi-brosjyre for norske boligbygg med vekt på å vise effekter av tiltak for energieffektivisering i typiske norske boligbygg. Arbeidet er utført innen rammene av prosjektet EPISCOPE ... -
Ultra-high surface area and mesoporous N-doped carbon derived from sheep bones with high electrocatalytic performance toward the oxygen reduction reaction
(Journal article; Peer reviewed, 2017)A nitrogen (N)-doped mesoporous carbon material exhibiting ultra-high surface area was successfully synthesized from sheep bones via a facile and low-cost method. The obtained carbon material had an ultra-high specific ... -
An Ultra-Low Temperature Transcritical R744 Refrigeration System for Future Detectors at CERN LHC
(Peer reviewed; Journal article, 2021)The cooling systems of the future tracking detectors of the ATLAS and CMS experiments at the Large Hadron Collider (LHC) at CERN will be entirely based on CO2 refrigeration technology. The system is a booster refrigeration ... -
Ultra-Low-Temperature Refrigeration Systems: A Review and Performance Comparison of Refrigerants and Configurations
(Peer reviewed; Journal article, 2023)During the last decade, many industrial and medical applications have shown a requirement for low-temperature-cooling usage (from −40 to −80 °C), which cannot be efficiently obtained via the conventional refrigeration ... -
Ultrasonic degassing of TDG supersaturated, flowing water
(Peer reviewed; Journal article, 2024) -
Uncertainty in multiphase flow estimates for a field development case
(Master thesis, 2013)Commercial multiphase flow simulators typically give one value for each output parameter simulated in a pipeline. Field development project managers want to know the uncertainty in these predictions in order to assess the ... -
Uncertainty of the allocation factors of heat and electricity production of combined cycle power plant
(Journal article; Peer reviewed, 2015)There are many different methods for the allocation of CO2 emissions in Combined Heat and Power plants. The choice of allocation method has a great effect on energy pricing and CO2 allocation in Combined Heat and Power ... -
Understanding Energy Conversion in Combustion
(Master thesis, 2021)I dette prosjektet har tre forskjellige modeller for flammer blitt undersøkt: forblandet velblandet reaktor, forblandet fritt-spredene flamme, og ikke-forblandet motstrøms flamme. Målet med prosjekter var å først bestemme ... -
Understanding GHG emissions from Swedish consumption - Current challenges in reaching the generational goal
(Journal article; Peer reviewed, 2019)The Swedish generational goal is a unique initiative governing all Swedish environmental policy, aiming at solving all major domestic environmental problems for the next generation without increasing environmental damage ... -
Understanding the consequences eradicating poverty and reducing world inequalities will have on the carbon-, material use- and land use footprints
(Master thesis, 2019)Menneskeskapte klimagassutslipp har de siste tiårene resultert i permanente skader på klimaet, noe som både vil påvirke denne og fremtidige generasjoner. Jordens gjennomsnittstemperatur har allerede steget med én grad siden ... -
Understanding the Effects of Power Ultrasound on the Hydrogen Evolution Reaction (HER) and the Oxygen Evolution Reaction (OER) on Polycrystalline Pt and Ni in Alkaline and Acidic Solutions
(Doctoral theses at NTNU;2022:172, Doctoral thesis, 2022)The aim of this Ph.D. project was to investigate the effect of power ultrasound on the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) on polycrystalline nickel (Ni) and platinum (Pt) in alkaline ... -
Understanding the Effects of Ultrasound (408 kHz) on the Hydrogen Evolution Reaction (HER) and the Oxygen Evolution Reaction (OER) on Raney-Ni in Alkaline Media
(Peer reviewed; Journal article, 2022)The hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) occurring at the Raney-Ni mesh electrode in 30 wt.-% aqueous KOH solution were studied in the absence (silent) and presence of ultrasound (408 ... -
Understanding the Environmental Implications of Energy Transitions. A Case Study for Wind Power
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:8, Doctoral thesis, 2013)A fundamental change in the ways in which we provide energy to run our economies, an energy transition, is needed to mitigate climate change. Wind power is an important part of future global energy supply in most energy ... -
Understanding the physical phenomena that occur inside heat exchanger for liquefactin of hydrogen
(Chapter, 2017)Liquid hydrogen is an attractive solution for long-range distribution. The largest barriers for implementing large-scale hydrogen liquefaction plants are currently their high energy consumption and cost. The heat exchangers ... -
Understanding the role of moisture recovery in indoor humidity: An analytical study for a Norwegian single-family house during heating season
(Journal article; Peer reviewed, 2022) -
Understanding the role of second life batteries in energy storage in Norway
(Master thesis, 2023)Denne oppgåva undersøker handteringa av brukte litium-ion batteri frå den norske elbilflåten. Etter kvart som transportsektoren vert dominert av elbilar blir det stadig viktigare å finne ut korleis ein best mogeleg kan ...