Blar i Institutt for energi og prosessteknikk på tittel
Viser treff 1029-1048 av 4196
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DNS of Turbulent Premixed Ammonia/Hydrogen Flames: The Impact of Thermo-Diffusive Effects
(Journal article; Peer reviewed, 2023)Direct Numerical Simulations (DNS) of three-dimensional premixed turbulent hydrogen-air flames enriched with 19%, 36%, 44% and 57% of NH (in volume) are performed. Starting from an equivalence ratio of 0.44 for the case ... -
Do Amphibians and Cash Crops Compete for Scarce Water? A Spatial Correlation Analysis
(Journal article; Peer reviewed, 2019)It has been argued that the trade of water intensive crops may be beneficial as it helps alleviate regional differences in water scarcity by effectively transporting moisture from humid regions to arid ones. However, the ... -
Do Cash Crops and Species Compete for Scarce Water?
(Master thesis, 2015)Water scarcity is a major environmental challenge of today. More than 2/3 of global water consumption is used in agriculture, part of which for export production or so called cash crops. Some argue that trade of water ... -
Do not be misled on the energy crisis
(Peer reviewed; Journal article, 2023)False narratives cloud our understanding of Europe's energy crisis and its relationship to climate change and climate policy. A clear-eyed understanding, based on factual knowledge and the insights of scientific research ... -
Do President Trump's tweets affect financial markets?
(Peer reviewed; Journal article, 2021)Frequent tweets of the former president of the United States, Donald Trump, provide a unique opportunity to study how financial markets respond to his statements. To do this, we utilize a precise timestamp of each tweet ... -
Documentation of an integrated thermal energy system for a building complex
(Chapter, 2015)In large buildings and building complexes, energy use can be reduced by efficient interaction between heating and cooling demands and thermal storage (short and long term storage). This work describes an integrated energy ... -
Does CCS reduce power generation flexibility? A dynamic study of combined cycles with post-combustion CO2 capture
(Journal article; Peer reviewed, 2020)To date, the deployment, integration, and utilization of intermittent renewable energy sources, such as wind and solar power, in the global energy system has been the cornerstone of efforts to combat climate change. At the ... -
Does climate action destroy jobs? An assessment of the employment implications of the 2‐degree goal
(Journal article; Peer reviewed, 2018)The Paris Agreement lays out the objective of keeping global warming below 2 °C. The goal can be achieved by increasing both the share of renewables in the energy mix and energy efficiency. Such action entails a transformation ... -
Does power ultrasound (26 kHz) affect the hydrogen evolution reaction(HER) on Pt polycrystalline electrode in a mild acidic electrolyte?
(Peer reviewed; Journal article, 2020)In this study, we investigated the effects of power ultrasound (26 kHz, up to ∼75 W/cm2, up to 100% acoustic amplitude, ultrasonic horn) on the hydrogen evolution reaction (HER) on a platinum (Pt) polycrystalline disc ... -
Does power ultrasound affect heterogeneous electron transfer kinetics?
(Journal article; Peer reviewed, 2018)Most of the observations seen in the application of power ultrasound in electrochemistry or also known as sonoelectrochemistry are due to enhanced mass-transport of electroactive species from the bulk solution to the ... -
Does power ultrasound affect hydrocarbon Ionomers?
(Peer reviewed; Journal article, 2021)The effect of low-frequency high-power ultrasound on hydrocarbon-based ionomers, cation exchange sulfonated phenylated polyphenylene (sPPB-H+) and anion exchange hexamethyl-p-terphenyl poly(benzimidazolium) (HMT-PMBI), was ... -
Does power ultrasound affect Nafion® dispersions?
(Journal article; Peer reviewed, 2020)The effect of low frequency power ultrasound on Nafion® ionomer used for fabricating proton exchange membrane fuel cell (PEMFC) and water electrolyzer (PEMWE) catalyst inks was investigated. In this study, a series of ... -
Dokumentasjon av ventilasjonsaggregat
(Bachelor thesis, 2023)I denne bacheloroppgaven skal det dokumenteres av et ventilasjonsaggregat i lab i Varmeteknisk bygg. Det ble bestemt å utføre tilstandskontroll av temperaturmålerne for aggregatet og måleren for utetemperaturen. Formålet ... -
Dokumentering og evaluering av ny teknisk løsning for vannbåren varme i norske leilighetsbygg
(Master thesis, 2018)I Norge er det strenge krav til energibruk i leilighetsbygg og byggereglene stiller krav om minst 60 % energifleksibel oppvarming. Dette har gjort at etterspørselen etter effektive og billigere løsninger for vannbåren ... -
Domestic and international aviation emission inventories for the UNFCCC parties
(Journal article; Peer reviewed, 2024)Global aviation emissions have been growing despite international efforts to limit climate change. Quantifying the status quo of domestic and international aviation emissions is necessary for establishing an understanding ... -
Domestic hot water decomposition from measured total heat load in Norwegian buildings
(Chapter, 2020)In Nordic climates, the energy use in buildings is dominated by space heating (SH) and domestic hot water (DHW). Heat load measurements with hourly resolution from smart meters are now becoming the standard. However, in ... -
Downwind Rotor: Studies on yaw Stability and Design of a Suitable Thin Airfoil
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:131, Doctoral thesis, 2014)The advantages of the downwind rotor for a wind turbine are explored as design solution for large wind turbines offshore. One of the key solutions of decreasing the cost of offshore wind energy is increasing rotor size. ... -
Drag and Wake Measurements on Cylinders and Discs for Wind Turbine Wake Modelling
(Master thesis, 2014)This master thesis presents an experimental study of the mean wake velocities, the drag coefficients and the vortex frequencies behind cylinders, porous discs and circular full discs. The thesis contributes to the development ... -
Drag force for a burning particle
(Peer reviewed; Journal article, 2020)Fully-resolved simulations of a burning char particle are performed to understand the effects of chemical reastions on the drag force by using the ghost cell immersed boundary method. The momentum, heat and mass transfers ... -
Drag reduction and aerodynamic performances in Olympic sports
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:118, Doctoral thesis, 2010)In sports where high speed is involved, races are often won by milliseconds. Any advantage can then be important in order to reach the success. The drag acting on the athletes is often the highest force that the athletes ...