A5015148005- Wave and Wind Energy Systems
- Wind Energy Research and Development
- Fluid Dynamics and Vibration Analysis
- Power System Reliability and Maintenance
- Optimal Power Flow Distribution
- Coastal and Marine Dynamics
- Wind and Air Flow Studies
- Electric Power System Optimization
- Advanced Thermoelectric Materials and Devices
- Thermal Analysis in Power Transmission
- Radio Frequency Integrated Circuit Design
- Semiconductor materials and devices
- Thermal Radiation and Cooling Technologies
- Ocean Waves and Remote Sensing
- Tropical and Extratropical Cyclones Research
- Cavitation Phenomena in Pumps
- Fluid dynamics and aerodynamics studies
- Energy Harvesting in Wireless Networks
- HVDC Systems and Fault Protection
- Advancements in PLL and VCO Technologies
- Vibration and Dynamic Analysis
- Superconducting Materials and Applications
- Innovative Energy Harvesting Technologies
- Advancements in Semiconductor Devices and Circuit Design
- Aquatic and Environmental Studies
National Renewable Energy Laboratory
2020-2024
Neurobehavioral Research Laboratory and Clinic
2023
Moscow Polytechnic University
2021
Texas Instruments (United States)
2004-2020
Gyeongsang National University
2004-2017
Lockheed Martin (United States)
2005
This paper proposes a method for choosing the best transmission system expansion plan considering probabilistic reliability criterion (/sub R/LOLE). The minimizes investment budget constructing new lines subject to criteria, which consider uncertainties of elements. Two criteria are used as constraints. One is R/LOLE/sub TS/) constraint, and other bus/nodal Bus/) constraint. proposed models problem an integer programming problem. It solves optimal strategy using branch bound that utilizes...
The flow-field around the rotor blades of an FOWT may be significantly influenced by six rigid-body motions floating platform via blade–wake interaction. Therefore, accurate prediction unsteady aerodynamic load which is calculated many conventional numerical approaches still questionable for FOWT. In this study, periodic pitching motion rotating turbine due to considered investigate effects vortex–wake–blade interaction performance computational fluid dynamics (CFD) simulations based on...
The objective of this study is to illustrate the unsteady aerodynamic effects a floating offshore wind turbine experiencing prescribed pitching motion supporting platform as sine function. three-dimensional, Reynolds Averaged Navier-Stokes equations with shear-stress transport (SST) k-ω turbulence model were applied. Moreover, an overset grid approach was used rigid body blade. current simulation results are compared various approaches from previous studies. loads blade demonstrated change...
Abstract The prediction of dynamic characteristics for a floating offshore wind turbine (FOWT) is challenging because the complex load coupling aerodynamics, hydrodynamics, and structural dynamics. These loads should be accurately calculated to yield reliable analysis results in design phase FOWT. In this study, high‐fidelity fluid‐structure interaction simulation that simultaneously considers influence aero‐hydrodynamic due motion FOWT has been conducted using computational fluid dynamics...
This work proposes a new method for choosing the best transmission system expansion plan highest satisfaction level of decision maker. The proposed considers permissibility and ambiguity investment budget (economics) constructing lines delivery marginal rate (reliability criterion) system. is achieved by modeling problem as fuzzy integer programming one. solves optimal strategy (a reasonable flexible that would not be significantly worsened any assumed changes in surrounding situations)...
Abstract Microelectronic thermoelectric generators are one potential solution to energizing energy autonomous electronics, such as internet-of-things sensors, that must carry their own power source. However, with the mm 2 footprint area necessary for on-chip integration made from high figure-of-merit materials have been unable produce voltage and levels required run Si electronics using common temperature differences. We present microelectronic 0.97 Ge 0.03 , by standard processing,...
The accurate prediction of unsteady aerodynamic performance and loads, for floating offshore wind turbines (FOWTs), is still questionable because several conventional methods widely used this purpose are applied in ways that violate the theoretical assumptions their original formulation. major objective present study to investigate effects rotating blade due periodic surge motions an FOWT. This work was conducted using numerical approaches, particularly computational fluid dynamics (CFD)...
Abstract This paper reports on a benchmark study based small-scale (1:50) measurements of single, oscillating water column chamber mounted sideways in long flume. The geometry the OWC is extracted from barge-like, attenuator-type floating concept “KNSwing” with 40 chambers targeted for deployment Danish part North Sea. In addition to traditional two-way energy extraction we also consider one-way passive venting and compare response, pressures total absorbed between two methods. A blind was...
Highly accurate and precise heave decay tests on a sphere with diameter of 300 mm were completed in meticulously designed test setup the wave basin Ocean Coastal Engineering Laboratory at Aalborg University, Denmark. The dedicated to providing rigorous benchmark dataset for numerical model validation. was ballasted half submergence, thereby floating waterline equator when rest calm water. Heave conducted, wherein held stationary dropped from three drop heights: small height, which can be...
This paper reports on an ongoing international effort to establish guidelines for numerical modeling of wave energy converters, initiated by the International Energy Agency Technology Collaboration Program Ocean Systems. Initial results point absorbers were presented in previous work, and here we present a breakwater-mounted Oscillating Water Column (OWC) device. The experimental model is at scale 1:4 relative full-scale installation water depth 12.8 m. power-extracting air turbine modeled...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation T. Tran, G. J. Ryu, Y. H. Kim, D. Kim; CFD-based design load analysis of 5MW offshore wind turbine. AIP Conf. Proc. 6 November 2012; 1493 (1): 533–545. https://doi.org/10.1063/1.4765539 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search...
Abstract This report describes the ongoing and planned development of software package CT-Opt (Current/Tidal Optimization), a control co-design modeling tool for marine hydrokinetic turbines. The commercialization these turbines has faced significant challenges due to complex, multidisciplinary nature their design extreme environmental conditions operation. project aims create that will enable efficient robust, cost-competitive turbine systems. Rather than using traditional optimization...
This paper presents the first blind prediction stage of Tidal Turbine Benchmarking Project being conducted and funded by UK's EPSRC Supergen ORE Hub. In this stage, only steady flow conditions, at low elevated turbulence (3.1%) levels, were considered. Prior to a large laboratory scale experiment was in which highly instrumented 1.6m diameter tidal rotor towed through towing tank well-defined conditions with without an upstream grid. Details test campaign design released as part community...
A nodal probabilistic production cost simulation method is described for power system long-term expansion planning considering unavailability and delivery limitation constraints of the transmission system. This new model includes capacity unavailabilities generators as well lines. methodology comes from composite equivalent load duration curve (CMELDC), based on a effective at points developed by authors. The CMELDC can be obtained convolution integral processing outage probability...
Integrated circuit (IC) thermoelectric generators (TEGs) fabricated by standard "65 nm" Si processing have been shown to be potentially competitive with (Bi, Sb) <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Te xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> TEGs in terms of maximum power generated, <inline-formula xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${P}_{\text {max}}$ </tex-math></inline-formula>...
Focused waves are increasingly used as a design method to predict extreme loads for offshore structures, such wave energy converters (WECs). However, the ability of computational methods accurately simulate prescribed focused and resulting structure interactions is not well validated. This study uses two fluid dynamic methods, WEC-Sim STAR-CCM+, evaluate responses taut-moored WEC-like buoys three different waves. computationally efficient, mid-fidelity model, based on linearised potential...
In this article, an industry leading 21 mask count 90nm CMOS SoC technology with integrated RF, analog, dense memory, low power or high-speed logic, and high-voltage DEMOS options is demonstrated. RF analog characteristics high on-chip voltage capability enable single chip radio design as well many additional applications.
Parametric resonance is a non-linear phenomenon in which system can oscillate at frequency different from its exciting frequency. Some wave energy converters are prone to this phenomenon, usually detrimental their performance. Here, computationally efficient way of simulating parametric point absorbers presented. The model based on linear potential theory, so the forces evaluated mean position body. However, first-order variation body's centres gravity and buoyancy taken into account. This...