Browsing Institutt for energi og prosessteknikk by Title
Now showing items 3592-3611 of 4147
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System model derivation of the CO2 two-phase ejector based on the CFD-based reduced-order model
(Journal article; Peer reviewed, 2017)The developed reduced-order model (ROM) of the R744 two-phase ejector was presented in this paper. The proper orthogonal decomposition (POD) model was employed together with the radial basis function (RBF) to evaluate the ... -
System, methods and credible data for calculating primary energy efficiency for energy systems with special focus on energy systems applying CHP-technology with bio based fuel
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:112, Doctoral thesis, 2014)During the last few decades, reduced energy consumption, increased energy efficiency and utilization of renewable energy have gained interest while different energy efficient energy conversion technologies have matured. ... -
Systematic and data-driven literature review of the energy and indoor environmental performance of swimming facilities
(Peer reviewed; Journal article, 2021)During the last few decades, focus on measures for energy conservation in buildings has increased considerably. The European Commission implemented the Energy Performance of Buildings Directive, which gave instructions to ... -
A systematic approach for data analysis and prediction methods for annual energy profiles: An example for school buildings in Norway
(Journal article; Peer reviewed, 2021)Current research on energy supply systems and building energy demand presents positive impacts from the two sides, with potentials of combining top-down and bottom-up modelling. Mostly, the energy demand input has been ... -
A systematic review of operating room ventilation
(Peer reviewed; Journal article, 2021)Ventilation systems are the primary way of eliminating airborne pathogenic particles in an operating room (OR). However, such systems can be complex due to factors such as different surgical instruments, diverse room sizes, ... -
Systemdrift 2020
(Research report, 2012)KUBE 2012 har i årets sommerprosjekt svart på problemstillingen: Hvordan bør Statnett drifte kraftsystemet i 2020? Utviklingen av systemdriften frem mot 2020 vil drives av en kraftig økning i utvekslingskapasitet mot ... -
Systemdynamisk analyse av vannkraftsystem
(Master thesis, 2007)I denne oppgaven er det gjennomført en dynamisk analyse av vannkraftverket Fortun kraftverk. Tre fenomener er særlig vurdert i denne oppgaven: Sjaktsvingninger mellom svingesjakt og magasin, trykkstøt ved turbinen som følge ... -
Systemic approaches for emission reduction in industrial plants based on physical accounting: example for an aluminium smelter
(Peer reviewed; Journal article, 2022)Greenhouse gas (GHG) accounting in industrial plants usually has multiple purposes, including mandatory reporting, shareholder and stakeholder communication, developing key performance indicators (KPIs), or informing ... -
Systemløsninger for håndtering av lavtrykksgass i LNG-eksportterminaler
(Master thesis, 2017)Det er analysert ulike løsninger for håndtering av lavtrykksgass fra LNG-anlegg. Lavtrykksgass er en blanding av metan og nitrogen i gassfase som dannes ved LNG-produksjon grunnet varmelekkasje, trykktap og pumpearbeid. I ... -
Systems analysis of waste management opportunities at ReMidt IKS: Focusing on the circular economy
(Master thesis, 2021)Bakgrunn: Politisk og offentlig interesse for «end of life»-sikkerheten til produkter og tilhørende miljøpåvirkninger har vokst de siste årene. Sirkulær og bærekraftig ressursbruk er nøkkelen til å iverksette en sirkulær ... -
Ta-ITO Coated Titanium Bipolar Plates for Proton Exchange Membrane Water Electrolyzers
(Peer reviewed; Journal article, 2022)A novel bi-layer coating composed of a tantalum base layer with an Indium Tin Oxide (ITO) top layer was applied to titanium substrates. Samples were polarized ex situ in a parameter study, where the pH, potential and ... -
Tailoring anion exchange membranes for palladium recovery from industrial solutions using electrodialysis
(Journal article; Peer reviewed, 2024)Limited natural reserves and extensive use of palladium across various industries make it urgent to implement efficient recovery strategies. Despite its unique advantages, the use of ion exchange membranes in electrodialysis ... -
Tailoring nanopores within nanoparticles of PtCo networks as catalysts for methanol oxidation reaction
(Journal article; Peer reviewed, 2017)It has been recently reported that engineering the pores within alloy nanoparticles leads to improvement in the electrochemical activity of nanoparticle catalysts due to the enhanced electrochemical active surface areas. ... -
Tailoring the gain and phase of the flame transfer function through targeted convective-acoustic interference
(Peer reviewed; Journal article, 2022)This paper investigates how targeted interference between two well characterized sources of hydrodynamic disturbances can modify the response of premixed bluff body stabilised flames with and without swirl. We introduce ... -
Tailoring the oxide surface composition of stainless steel for improved OER performance in alkaline water electrolysis
(Peer reviewed; Journal article, 2022)There is a strong desire to replace bulk nickel electrodes for oxygen evolution reaction (OER) with a cheaper and more active steel material in alkaline water electrolyser (AWE). However, implementing an activation procedure ... -
Taking the Motion out of Floating Lidar: Turbulence Intensity Estimates with a Continuous-Wave Wind Lidar
(Peer reviewed; Journal article, 2020)Due to their motion, floating wind lidars overestimate turbulence intensity ( TI ) compared to fixed lidars. We show how the motion of a floating continuous-wave velocity–azimuth display (VAD) scanning lidar in all six ... -
Taleforståelighet: En enkel modell
(Master thesis, 2009) -
Technical Note: Evaluating a simple parameterization of radiative shortwave forcing from surface albedo change
(Journal article; Peer reviewed, 2013)Land-use activities affect Earth’s energy balance not only via biogeochemical emissions, but also through perturbations in surface albedo, the latter of which is often excluded in impact assessment studies. In this short ... -
Techniques for airflow measurements to determine the real efficiency of heat recovery in ventilation systems
(Journal article; Peer reviewed, 2019)Heat recovery in ventilation is essential to reduce energy use and thus mitigate greenhouse gas emissions from the building sector. Heat recovery efficiency of at least 80 % in new buildings is required according to Norwegian ... -
Techno economic evaluation of amine based CO2 capture: impact of CO2 concentration and steam supply
(Journal article; Peer reviewed, 2012)The timing and selection of CO2 sources will affect the cost of achieving projected CCS based emission reductions. Performed process simulations and cost estimations clearly point out the impact of CO2 concentration and ...