A5100422623- High Temperature Alloys and Creep
- Fatigue and fracture mechanics
- Microstructure and Mechanical Properties of Steels
- Microgrid Control and Optimization
- Electrostatic Discharge in Electronics
- Nuclear Materials and Properties
- Engineering Applied Research
- Semiconductor materials and devices
- Metallurgy and Material Forming
- Optimal Power Flow Distribution
- High-Temperature Coating Behaviors
- High Entropy Alloys Studies
- Material Properties and Failure Mechanisms
- Internet of Things and Social Network Interactions
- Fire effects on concrete materials
- Aluminum Alloy Microstructure Properties
- Intermetallics and Advanced Alloy Properties
- Electromagnetic Compatibility and Noise Suppression
- Advancements in Semiconductor Devices and Circuit Design
- Power System Optimization and Stability
- Railway Systems and Energy Efficiency
- Advanced MEMS and NEMS Technologies
- Lower Extremity Biomechanics and Pathologies
- Smart Grid Energy Management
- Additive Manufacturing Materials and Processes
Hanyang University
2008-2025
Convergence
2024
Korea Institute of Energy Research
2022-2024
Pukyong National University
2010-2024
Korea Institute of Industrial Technology
2014-2023
Pohang University of Science and Technology
2015-2022
Kookmin University
2020
Kunsan National University
2020
Pusan National University
2007-2019
Korea Aerospace University
2018
The Al-DMP hybrid multilayers improve electrolyte wettability and lithiophilicity, resulting in superior cycling performance. integration of a superlattice structure significantly enhances air stability, maintaining stability for 60 hours.
We report a novel method for fabricating highly sensitive chemical sensor based on ZnO nanorod array that is epitaxially grown Pt-coated Si substrate, with top-top electrode configuration. To practically test the device, its O(2) and NO(2) sensing properties were investigated. The gas of this type device suggest approach promising fabrication reliable sensors.
To investigate the dynamic strain aging (DSA) behavior of Alloy 617, high-temperature tensile tests were carried out with rates variations 10−3/s, 10−4/s, and 10−5/s from 24°C to 950°C. Five flow relationships, Hollomon, Ludwik, Swift, Ludwigson, Voce, applied describe true stress–strain curves, DSA region was defined. In describing Ludwigson's equation superior other equations, adequately defined by this as plateaus at intermediate temperatures 200°C 700°C. It identified that 617 is...
Mobile energy storage devices (MESDs) operate as medium- or large-sized batteries that can be loaded onto electric trucks and connected to charging stations provide various ancillary services for distribution grids. This article proposes a new strategy MESD operation, in which their power outputs paths are co-optimally scheduled minimize the total loss both transportation networks. The distances moved by MESDs time at different locations modeled using set of linear equations, considering...
Optimal operation scheduling of energy storage systems (ESSs) has been considered as an effective way to cope with uncertainties arising in modern grid such the inherent intermittency renewable sources (RESs) and load variations. This paper proposes a algorithm where ESS power inputs are optimally determined minimize microgrid (MG) cost. The proposed consists two stages. In first stage, hourly schedules during day optimized one advance objective minimizing operating second optimal schedule...
Hydrogen energy storage (HES) has attracted renewed interest as a means to enhance the flexibility of power balancing achieve goal low-carbon grid. This paper presents an innovative data-driven HES model that reflects interactive operations electrolyzer, fuel cell, and hydrogen tanks. A predictive control strategy is then developed, in which units support frequency regulation (FR) microgrid (MG). In proposed strategy, MG-level controller designed optimize sharing, allow respond quickly...
We demonstrate an N719 dye sensitized solar cell based on Cu2FeSnS4 (CFTS) as a counter electrode. The elements for the material are all earth abundant and environmentally benign. power conversion efficiency of DSSC using CFTS was comparable to that Pt under A.M. 1.5G (100 mW cm−2).
This paper proposes a new strategy for optimal grid frequency regulation (FR) in an interconnected power system where regional ac grids and offshore wind farm are linked via multi-terminal high voltage direct-current (MTDC) network. In the proposed strategy, decentralized <i>H</i><sub>∞</sub> controllers developed to coordinate operations of synchronous generators MTDC converters, thus achieving sharing minimizing deviations each grid. To develop controllers, robust optimization...
본 연구는 기존에 제조되었던 교호집성재의 휨강도의 단점을 보완하고 새로운 특성을 가진 교호 집성재 즉, 합판을 코어로 이용한 집성재가 기계적강도의 효과를 알아보기 위해 수행되었다. 집성재와 합판의 구성 방법, 적층 방향에 따라 그 값을 비교하였으며, 그에 따른 휨강도와 탄성계수를 측정하여 분석한 결과, 중심부를 집성판과 혼합하여 구성한 합판 코어 집성재의 휨강도(MOR) 값이 59.6% 강도가 향상되어 교호집성재구조 대조군보다는 우수하고, 집성재구조 대조군과는 유사한 강도를 나타냈다. 휨탄성계수(MOE)는 구조 및 방향성에 상관없이 모두 대조군과 MOE 치수 안정성 실험에서는 코어에 사용한 합판코어 사용으로 인하여, 수축 팽창률 대조군에 비해서 더 안정적인 것으로 나타났다. This study was performed to physical and mechanical properties of hybrid cross laminated timber (HCLT) with...
Alloy 617 is the one of leading candidate materials for intermediate heat exchangers (IHX) application a Very High Temperature Reactor (VHTR) system economic production electricity and hydrogen. Creep rupture data were obtained from series creep tests with different applied stresses at 850oC, 900oC 950oC. On basis systematic analysis experimental data, behaviour was analyzed using various relationships laws, such as Norton's power law, Monkman-Grant Relationships (MGR), Modified (MMGR),...
Islanded hybrid ac/dc microgrids (IHMGs), in which ac and dc subgrids are interconnected via interlinking converters (ICs), have emerged as a promising solution for efficient zero-carbon power grids. In an IHMG, primary objectives of the secondary control distributed generators (DGs) to 1) restore frequency subgrid ( <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">f</i> ) common bus voltage xmlns:xlink="http://www.w3.org/1999/xlink">V</i>...