Blar i Publikasjoner fra CRIStin - SINTEF Energi på tittel
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Condensation heat transfer of CO2 on Cu based hierarchical and nanostructured surfaces
(Peer reviewed; Journal article, 2021)Phase-change processes such as condensation are efficient means of heat transfer. However, condensation is also an energy-intensive process and extensive research is conducted to increase the heat transfer efficiency. ... -
Condition Assessment of Hydrogenerator Stator Bar Insulation Using Partial Discharge Measurements
(Chapter; Peer reviewed, 2018)This paper presents results from laboratory measurements of partial discharge (PD) activity in 50 cm long samples cut from the mainwall section of old hydrogenerator stator bars. All stator bars were manufactured in 1976 ... -
Conduction and Electric Fields in Dielectric Liquids in Needle-to-Plane Gaps
(Peer reviewed; Journal article, 2024)This paper describes measurements of conduction currents in both neat and commercial insulating liquids. Conduction in thermodynamic equilibrium has been measured by applying a low ac voltage in a uniform field. High-field ... -
Configuration and model order selection of frequency-dependent π-models for representing dc-cables in small-signal eigenvalue analysis of HVDC transmission systems
(Peer reviewed; Journal article, 2020)Eigenvalue-based analysis of small-signal dynamics in High Voltage Direct Current (HVDC) transmission systems requires cable models that are compatible with a state-space representation. While distributed parameter models ... -
Consequences for Residential customers when changing from energy based to capacity based tariff structure in the distribution grid
(Chapter; Peer reviewed, 2017)This paper presents the trends towards capacity based grid tariffs and results from a work analysing the consequences different grid tariffs will have for residential customers, based on their consumption profile. The ... -
Consequences of Uncertainty from Intraday Operations to a Capacity Expansion Model of the European Power System
(International Conference on the European Energy Market;2023, Chapter; Peer reviewed, 2023)The European Energy Transition envisions a high deployment of variable renewable energy sources (VRES) by 2050. Some estimates expect that 60-to-70% of power generation will be entirely covered by VRES technologies (i.e., ... -
Considerations on factors affecting biocarbon densification behavior based on a multiparameter model
(Peer reviewed; Journal article, 2021)The optimization of upscaled biochar pelleting is limited by lack of knowledge regarding the effects of process parameters. A multiparameter model, coupled to a single pellet press unit, was for the first time applied to ... -
Considering flexibility in network expansion planning: present practices and regulatory conditions
(International Conference on the European Energy Market;2020, Chapter; Peer reviewed, 2020)There are strong regulatory signals prompting European system operators to consider flexible resources as an active subject in the grid expansion planning. The present paper is based on the first results from H2020 project ... -
Constrained adaptive sampling for domain reduction in surrogate model generation: Applications to hydrogen production
(Peer reviewed; Journal article, 2021)We propose a new approach for sampling domain reduction for efficient surrogate model generation. Currently, the standard procedure is to use box constraints for the independent variables when sampling the exact simulator. ... -
Contact and nozzle wear from 100 interruptions for a puffer-type air load break switch
(Journal article; Peer reviewed, 2017)One type test requirement for medium voltage load break switches is to interrupt 100 consecutive "mainly active loads". A puffer-type switch with axial-blown arc has been tested according to the 630 A/24 kV ratings. The ... -
Contact Angle and Condensation of a CO2 Droplet on a Solid Surface
(Journal article; Peer reviewed, 2019)Anthropogenic release of carbon dioxide (CO2) is a major contribution to manmade increase in global warming. Carbon capture and storage (CCS) is a necessary technology for lowering CO2 emissions to an acceptable level that ... -
Continuous Hydrothermal Flexibility Coordination Under Wind Power Uncertainty
(Peer reviewed; Journal article, 2022)This paper develops a stochastic continuous-time optimization model for coordinating the operation of flexibility in a hybrid hydro-thermal-wind power system. The developed model gives insight for investigating the short-term ... -
Contraction Analysis for a MMC Converter
(Chapter; Peer reviewed, 2019)One of the present barriers to the widespread use of Modular Multilevel Converters (MMC) is the complexity of its control. We use a suitable degree of simplifications of the MMC converters, under given conditions, to allow ... -
Control Challenges and Possibilities for Offshore Wind Farms
(SINTEF Energi. Rapport;, Research report, 2013)Electricity generation from large offshore wind farms is being gradually accepted as a feasible solution to meet the rapid increase in energy demands. However, although the technology is progressing fast, a major drawback ... -
Control of steam bottoming cycles using nonlinear input and output transformations for feedforward disturbance rejection
(Peer reviewed; Journal article, 2022) -
Control Strategies for Variable Speed Operation of Pumped Storage Plants with Full-size Converter Fed Synchronous Machines
(Chapter; Peer reviewed, 2021)The full-size converter fed synchronous machine (CFSM) for variable speed operation of a pumped storage power plant exhibits multiple advantages over the state-of-the-art Doubly Fed Induction Machine (DFIM) technology. The ... -
Control system for start-up and shut-down of a floating vertical axis wind turbine
(Peer reviewed; Journal article, 2013)A baseline control system for the Deepwind floating vertical axis wind turbine (VAWT) concept is analysed with em- phasis on start-up and shut-down schemes. The turbine concept includes a rotating spar with a 2-bladed rotor ... -
Convergence properties of detonation simulations
(Journal article; Peer reviewed, 2019) -
Convex Optimization-based Control Design for Parallel Grid-Connected Inverters
(Journal article; Peer reviewed, 2018)This paper presents a novel frequency-domain approach towards the control design for parallel grid-connected voltage source inverters (VSIs) with LCL output filters. The proposed method allows to design the controllers of ... -
Convex Relaxations of the Short-Term Hydrothermal Scheduling Problem
(Peer reviewed; Journal article, 2020)This paper concerns the assessment of two methods for convex relaxation of the short-term hydrothermal scheduling problem. The problem is originally formulated as a mixed integer programming problem, and then approximated ...