Blar i Publikasjoner fra CRIStin - SINTEF Energi på dokumenttype "Journal article"
Viser treff 1-20 av 928
-
A 2D FEM Model For Impedance and Loss Calculation of Armored Three-Core Cables With Inclusion of 3D Pitching Effects
(Peer reviewed; Journal article, 2023)A method is introduced for impedance and loss calculation of three-core power cables with steel armoring, based on 2D finite element method (FEM) computations. The pitching effect of the cores and armor wires is taken into ... -
3D fluid modeling of positive streamer discharges in air with stochastic photoionization
(Peer reviewed; Journal article, 2020)Streamer discharges are thin plasma channels that precede lightning and sparks. They usually evolve in bundles as stochastic tree-like structures and are inherently difficult to model due to their multiscale nature. In ... -
A 3D kinetic Monte Carlo study of streamer discharges in CO2
(Peer reviewed; Journal article, 2024)We theoretically study the inception and propagation of positive and negative streamers in CO2. Our study is done in 3D, using a newly formulated kinetic Monte Carlo discharge model where the electrons are described as ... -
4D Seismic Monitoring of CO2 Storage During Injection and Post-closure at the Ketzin Pilot Site
(Journal article; Peer reviewed, 2017)At the Ketzin pilot site for geological CO2 storage, about 67,000 tons of CO2 were injected during the period June 2008 – August 2013. Since August 2013, the site is in its post-closure phase. Before and during the injection ... -
A Bayesian spatial assimilation scheme for snow coverage observations in a gridded snow model
(Journal article; Peer reviewed, 2006) -
A Case Study on Medium-Term Hydropower Scheduling with Sales of Capacity
(Journal article; Peer reviewed, 2016)This paper conducts a case study on hydropower scheduling considering sales of capacity reserves and impacts of detailed mod-elling. In latter years a growing demand for reserve capacity has been needed to ensure stable ... -
A Comparative Study of Methods for Estimating Virtual Flux at the Point of Common Coupling in Grid-Connected Voltage Source Converters with LCL Filter
(Journal article; Peer reviewed, 2017)Grid synchronization based on virtual flux (VF) estimation allows for control of grid-connected power converter without depending on ac-voltage measurements. This is useful in voltage-sensor-less applications for reducing ... -
A comparison of linear interpolation and spline interpolation for turbine efficiency curves in short-term hydropower scheduling problems
(Journal article; Peer reviewed, 2019)The purpose of short-term hydropower scheduling (STHS) in a competitive electricity market is to maximize the profit in the near future while adapting to the mid-term strategies for system operation. To ensure a realistic ... -
A Comparison of Low Flow Estimates in Ungauged Catchments Using Regional Regression and the HBV-Model
(Journal article; Peer reviewed, 2009) -
A Comparison of Post-combustion Capture Technologies for the NGCC
(Journal article; Peer reviewed, 2017)Four different post-combustion capture technologies are compared for the same NGCC (electric efficiency 58.1% without CO2 capture). The technologies are aqueous amine, polymeric membranes, a low temperature sorbent and ... -
A comprehensive model for char particle conversion in environments containing O2 and CO2
(Journal article; Peer reviewed, 2015)In this work, conversion of char is studied in a simulation code that includes a simplified heterogeneous adsorption–desorption reaction mechanism for char chemical reactivity and uses GRI-Mech 3.0 as the chemical kinetic ... -
A Damping Factor-Based White-Box Transformer Model for Network Studies
(Journal article; Peer reviewed, 2018)Transformer manufacturers make routine use of white-box detailed transformer models for ensuring that the transformer will pass the lightning impulse test. For use in general simulation studies, the model should additionally ... -
A fracture-propagation-control model for pipelines transporting CO2-rich mixtures including a new method for material-model calibration
(Journal article; Peer reviewed, 2017)This work considers a predictive numerical modelling approach for fracture-propagation control in CO2-transport pipelines, an area where current engineering tools do not work. Fluid-structure interaction model simulations ... -
A gas ejector for CO2 supercritical cycles
(Journal article; Peer reviewed, 2018)he CO2 ejectors are recently often used as the main expansion device in the modern refrigeration cycles. On the other hand, according to the newest literature the implementation the ejectors into supercritical CO2 power ... -
A generic framework for power system flexibility analysis using cooperative game theory
(Journal article; Peer reviewed, 2017)Electricity grid infrastructures provides valuable flexibility in power systems with high shares of variable supply due to its ability to distribute low-cost supply to load centers (spatial), in addition to interlinking a ... -
A harmonic pressure differential wave energy converter
(Journal article; Peer reviewed, 2017)A pressure differential sea wave energy converter concept using the forced harmonic motion of a hydraulic water column and hydraulic piston is presented. The mechanical power from the hydraulic piston is converted to ... -
A method for simulating two-phase pipe flow with real equations of state
(Journal article; Peer reviewed, 2014)Common two-fluid models for pipe flow assume local non-equilibrium regarding phase transfer. To solve the two-fluid models together with accurate equations of state for real fluids will in most cases require mechanical, ... -
A Model for Techno-Economic Optimization of Wind Power Combined with Hydrogen Production in Weak Grids
(Journal article; Peer reviewed, 2009) -
A modified homogeneous relaxation model for CO2 two-phase flow in vapour ejector
(Journal article; Peer reviewed, 2016)In this study, the homogenous relaxation model (HRM) for CO2 flow in a two-phase ejector was modified in order to increase the accuracy of the numerical simulations The two- phase flow model was implemented on the effective ... -
A new approach to the identification of high-potential materials for cost-efficient membrane-based post-combustion CO2 capture
(Journal article; Peer reviewed, 2018)Developing “good” membrane modules and materials is a key step towards reducing the cost of membrane-based CO2 capture. While this is traditionally being done through incremental development of existing and new materials, ...