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Undersøkelse av inneklimakvalitet i lagringsmagasinene på NTNU Gunnerus Biblioteket
(Master thesis, 2019)Hovedformålet med denne masteroppgaven var å undersøke og kartlegge inneklimaet til de historiske lagringsmagasinene til NTNU Gunnerus Biblioteket. Dette ble gjort gjennom overvåkning av de termo-hygrometriske parameterne; ... -
Undersøkelse av NVF 2020 relatert til vannkraftverk
(Master thesis, 2020)Statnett reviderer dokumentet som definerer funksjonskravene for turbinregulatorer i norske vannkraftverk. Revisjonen er en del av en større europeisk reform med hensikt å løse frekvensproblemer i det nordiske synkronnettet. ... -
Undersøkelse av småturbin
(Master thesis, 2012)I denne oppgaven har en Kaplan turbin produsert i Afghanistan blitt undersøkt. En fullstendig virkningsgradanalyse er gjort i laboratoriet, på to av fire løpehjulsvinkler. Like før innløpet til turbinen er det et 90 grader ... -
Undersøkelse av ustasjonære og turbulente forhold i minirigg ved hjelp av LDV, trykkmålinger og CFD
(Master thesis, 2009)Diplomoppgava fortsetter arbeidet som blei starta i prosjektoppgava høsten 2008. Det er utført laboratorieforsøk på en minirigg der spinn settes opp i et vertikalt rør. Nedstrøms kan vann injiseres tangentielt gjennom ei ... -
Undersøkelse av varmetap ved Grong barneskole
(Master thesis, 2010)I Undersøkelse av varmetap ved Grong barneskole er fasadene termografert utvendig og innvendig for å avdekke kuldebroer og infiltrasjon. Termograferingen ble foretatt uten å trykksette bygget. Årsaken til at termografering ... -
Undersøkelse av ventilasjonsprinsipper for museer
(Master thesis, 2019)Museer er institusjoner som skal ta vare på samlinger av gjenstander med historisk eller vitenskapelig verdi, samt kunstverk. Denne kunnskapen skal videreføres gjennom utstillinger tilgjengelig for offentligheten, og sikre ... -
Unequal carbon tax impacts on 38 million German households: assessing spatial and socio-economic hotspots
(Journal article, 2023)Carbon pricing is a core climate policy in many countries. However, the distribution of impacts is highly unequal across income brackets, but also across household types and regions. The complex interplay between household ... -
The unequal contribution to global energy consumption along the supply chain
(Peer reviewed; Journal article, 2020)Reducing fossil fuel consumption is a top priority option for climate change mitigation, which requires collaborations of partners along the supply chain, such as energy suppliers, energy consumers and final consumers of ... -
The unequal distribution of household carbon footprints in Europe and its link to sustainability
(Peer reviewed; Journal article, 2020)The distribution of household carbon footprints is largely unequal within and across countries. Here, we explore household-level consumption data to illustrate the distribution of carbon footprints and consumption within ... -
A Unified Geometry Parametrization Method for Turbomachinery Blades
(Peer reviewed; Journal article, 2021)Turbomachinery design is increasingly carried out by means of automated workflows based on high-fidelity physical models and optimization algorithms. The parametrization of the blade geometry is an essential aspect of such ... -
Uniform-momentum zones in a turbulent boundary layer subjected to freestream turbulence
(Peer reviewed; Journal article, 2021)The instantaneous structure of a turbulent boundary layer that has developed beneath freestream turbulence (FST) was investigated with planar particle image velocimetry. Measurements were performed in the streamwise–wall-normal ... -
Unlocking cell chemistry evolution with operando fibre optic infrared spectroscopy in commercial Na(Li)-ion batteries
(Peer reviewed; Journal article, 2022)Improvements to battery performance, reliability and lifetime are essential to meet the expansive demands for energy storage. As part of this, continuous monitoring of the dynamic chemistry inside cells offers an exciting ... -
Unlocking Room Temperature Formation of Li-Rich Phases in Aluminum Anodes for Li-ion Batteries
(Journal article; Peer reviewed, 2024)Aluminum (Al) has been an attractive anode candidate for lithium-ion batteries (LIBs) since the 1970s. While the formation of β-LiAl is considered the origin of the Li storage capability in Al anodes, multiple Li-Al phases ... -
Unraveling the Impact of Land Cover Changes on Climate Using Machine Learning and Explainable Artificial Intelligence
(Peer reviewed; Journal article, 2021)A general issue in climate science is the handling of big data and running complex and computationally heavy simulations. In this paper, we explore the potential of using machine learning (ML) to spare computational time ... -
Unraveling the role of biofuels in road transport under rapid electrification
(Peer reviewed; Journal article, 2022)Biofuels have been the predominant option for climate change mitigation in road transport for decades, but the recent expansion of electric vehicles may bring into question their key role. In this work we model the energy ... -
Unstable two phase flow in long vertical pipes
(Master thesis, 2018)Flow instabilities can cause operational problems when transporting multiphase mixtures of oil and gas in offshore risers and pipelines. Several types of flow instabilities have been studied and are well documented. This ... -
Unsteady flow in wicket gate and runner with focus on static and dynamic load on runner
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:155, Doctoral thesis, 2007)This thesis presents a study on unsteady flow at the inlet of the runner in a Francis turbine. The main goal has been to find a connection between the design of the wicket gate and the dynamic load on the runner due to ... -
Unveiling bulk and surface radiation forces in a dielectric liquid
(Peer reviewed; Journal article, 2022)Precise control over light-matter interactions is critical for many optical manipulation and material characterization methodologies, further playing a paramount role in a host of nanotechnology applications. Nonetheless, ... -
Upgrading protected areas can improve or reverse the decline in conservation effectiveness: Evidence from the Tibetan Plateau, China
(Peer reviewed; Journal article, 2023)Protected areas (PAs) are considered essential for maintaining biodiversity. Several governments would like to strengthen the management levels of their PAs (as shorthand for a hierarchy in PA administrative governance) ... -
Upscaling of wind turbine blades
(Doktoravhandlinger ved NTNU, 1503-8181; 2003:94, Doctoral thesis, 2003)The wind turbine industry is rapidly growing, and wind turbines are growing in size accordingly. For the wind turbines in the past and up to the present commercial size, aerodynamic forces have basically governed all blade ...