Blar i Publikasjoner fra CRIStin - NTNU på tidsskrift "Renewable Energy"
Viser treff 21-40 av 44
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From vague interest to strong intentions to install solar panels on private homes in the North – An analysis of psychological drivers
(Peer reviewed; Journal article, 2020)Solar panels have not seen the same widespread adoption in the Nordic countries as in the rest of Europe. The aim of the paper is to investigate how house owners that have already expressed some interest in solar panels ... -
Hydrostatic Stability and Hydrodynamics of a Floating Wind Turbine Platform Integrated with Oscillating Water Columns: A Design Study
(Peer reviewed; Journal article, 2024)One of the challenges in the installation of Floating Wind Turbines (FWTs) is the occurrence of undesired resonant motions under environmental conditions, which adversely impact their lifespan, maintenance cost, components ... -
Hydrothermal carbonization of olive wastes to produce renewable, binder-free pellets for use as metallurgical reducing agents
(Journal article, 2020)Torrefaction or hydrothermal carbonization processes were compared for conversion of olive pulp into metallurgical reducing agent. The dependence of yield, CO2 reactivity, and mechanical properties to reaction time and ... -
Identifying key design parameters of the integrated energy system for a residential Zero Emission Building in Norway
(Journal article; Peer reviewed, 2016)This study examined an integrated solution of the building energy supply system consisting of flat plate solar thermal collectors in combination with a ground-source heat pump and an exhaust air heat pump for the heating ... -
Implementation and evaluation of control strategies based on an open controller for a 10 MW floating wind turbine
(Journal article; Peer reviewed, 2021)The reliability assessment concerning the drivetrain system is important for integrated dynamic analysis of large-scale floating wind turbines (FWTs). An open, modular, and adaptable baseline wind turbine controller is ... -
Influence of variability and uncertainty of wind and waves on fatigue damage of a floating wind turbine drivetrain
(Peer reviewed; Journal article, 2021)This study investigates the effect of variability and uncertainty of wind and wave conditions on the short-term fatigue damage of a 10-MW floating wind turbine drivetrain. Global dynamic responses of a semi-submersible ... -
Integrated dynamic analysis of a spar floating wind turbine with a hydraulic drivetrain
(Peer reviewed; Journal article, 2022)Conventional drivetrains with gearbox failures are associated with major downtime in offshore wind turbines. This impacts the maintenance cost and cost of energy. A hydraulic transmission eliminates the need for gearbox ... -
Internal hydro- and wind portfolio optimisation in real-time market operations
(Peer reviewed; Journal article, 2021)In this paper aspects related to handling of intraday imbalances for hydro and wind power are addressed. The definition of imbalance cost is established and used to describe the potential benefits of shifting from ... -
Investigation of a Francis turbine during speed variation: Inception of cavitation
(Peer reviewed; Journal article, 2020)Variable-speed operation of a hydro turbine is considered as an alternative option to meet fluctuating energy demand as it allows high-ramping rate. Cavitation can be a limiting factor to utilize the variable-speed technology ... -
An investigation of using CO<inf>2</inf> heat pumps to charge PCM storage tank for domestic use
(Journal article; Peer reviewed, 2023)Current investigations mainly focused on onefold phase change material (PCM) storage tank charging process, while the integration between a heat-source device and a PCM storage tank has been seldom considered. The investigation ... -
Investigations of unsteady pressure loading in a Francis turbine during variable-speed operation
(Journal article; Peer reviewed, 2017)Current study was aimed to investigate the unsteady pressure loading in a model Francis turbine under variable-speed configurations. Focus was to investigate the time-dependent characteristic frequencies and the pressure ... -
Model-based Fault Detection, Fault Isolation and Fault-tolerant Control of a Blade Pitch System in Floating Wind Turbines
(Journal article; Peer reviewed, 2018)This paper presents model-based fault detection, fault isolation, and fault-tolerant control schemes focused on blade pitch systems in floating wind turbines. Fault detection, isolation, and accommodation techniques are ... -
Natural heat transfer air-conditioning terminal device and its system configuration for ultra-low energy buildings
(Peer reviewed; Journal article, 2020)In consideration of the lowered heating and cooling load of ultra-low energy buildings, a natural heat transfer air-conditioning terminal device (NHTACTD) is presented by the authors. The terminal device is able to undertake ... -
Numerical investigation of modeling frameworks and geometric approximations on NREL 5 MW wind turbine
(Journal article; Peer reviewed, 2018)The key to the better design of an industrial scale wind turbine is to understand the influence of blade geometry and its dynamics on the complicated flow-structures. An industrial-scale wind turbine can be numerically ... -
Numerical modelling and dynamic response analysis of a 10 MW semi-submersible floating offshore wind turbine subjected to ship collision loads
(Journal article; Peer reviewed, 2022)The number of installed offshore wind turbines is continuously growing worldwide in recent years. Offshore wind farms are generally located near the coast close to traffic lanes and are exposed to the risk of collisions ... -
Optimal combination of bioenergy and solar photovoltaic for renewable energy production on abandoned cropland
(Peer reviewed; Journal article, 2021)Ambitious climate change mitigation scenarios require large-scale deployment of bioenergy and solar photovoltaics. Utilizing recently abandoned cropland for renewable energy production is a promising option for energy ... -
Optimization of operational cost for a grid-supporting PV system with battery storage
(Journal article, 2016)Coupling an energy storage to a photovoltaic (PV) system not only increases the self-consumption but also solves the over-voltage issues if the cycling of the storage is properly controlled. Whatever the application the ... -
Review on numerical techniques applied in impulse hydro turbines
(Peer reviewed; Journal article, 2020)Impulse turbines are widely used in hydropower plants around the world due to their high efficiency in a larger operating range compared to reaction turbines. State of the art Pelton turbines can give over 90% efficiency ... -
Rotor imbalance detection and diagnosis in floating wind turbines by means of drivetrain condition monitoring
(Peer reviewed; Journal article, 2023)This paper presents a novel approach for detection and diagnosis of the rotor imbalance types pitch misalignment, yaw misalignment and mass imbalance by monitoring the drivetrain vibration response. Traditionally, only ... -
Solar PV generation in Colombia - A qualitative and quantitative approach to analyze the potential of solar energy market
(Journal article; Peer reviewed, 2019)Colombia faces several challenges to secure a reliable, affordable, and climate-friendly energy supply. Persistently low reserve-to-production ratios in oil and gas, together with advancing climate change, are putting the ...