Search Results - "Cho, Junhyun"

Deformation-immunized optical deposition of graphene for ultrafast pulsed lasers by Kim, Hyungseok, Cho, Junhyun, Jang, Sung-Yeon, Song, Yong-Won

“…We demonstrate deformation-suppressed optical deposition of graphene onto an optical fiber by forming a graphene/polyvinyl acetate (PVAc) composite for…”
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Analysis of the transient response and durability characteristics of a proton exchange membrane fuel cell with different micro-porous layer penetration thicknesses by Cho, Junhyun, Park, Jaeman, Oh, Hwanyeong, Min, Kyoungdoug, Lee, Eunsook, Jyoung, Jy-Young

“…•The GDL which has a large MPL penetration showed a better transient response.•The transient response of the PEMFC was affected by the water balance of the…”
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Transient response of a unit proton-exchange membrane fuel cell under various operating conditions by Cho, Junhyun, Kim, Han-Sang, Min, Kyoungdoug

“…The transient response of proton-exchange membrane fuel cells (PEMFCs) is an important criterion in their application to automotive systems. Nevertheless, few…”
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Effect of the micro porous layer design on the dynamic performance of a proton exchange membrane fuel cell by JUNHYUN CHO, HWANYEONG OH, JAEMAN PARK, KYOUNGDOUG MIN, EUNSOOK LEE, JYOUNG, Jy-Young

“…The mass transport characteristics of a gas diffusion layer (GDL) predominantly affect the performance of a proton exchange membrane (PEM) fuel cell. However,…”
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Evaluation of ionic liquids as absorbents for absorption refrigeration systems using hydrofluoro-olefin refrigerant by Lee, Yonggyun, Lee, Gilbong, Cho, Junhyun, Choi, Bongsu, Han, Nyeon Gu, Kim, Dong Kyu

“…In this study, we evaluate the use of ILs as absorbents in a double effect absorption refrigeration system using HFO refrigerant. By examining the properties…”
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Analysis of transient response of a unit proton-exchange membrane fuel cell with a degraded gas diffusion layer by Cho, Junhyun, Ha, Taehun, Park, Jaeman, Kim, Han-Sang, Min, Kyoungdoug, Lee, Eunsook, Jyoung, Jy-Young

“…The transient response characteristics and durability problems of proton-exchange membrane fuel cells are important issues for the application of PEM fuel…”
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Exergy and Thermoeconomic Analyses of a Carnot Battery System Comprising an Air Heat Pump and Steam Turbine by Lee, Kum-Jung, Seo, Seok-Ho, Cho, Junhyun, Oh, Si-Doek, Choi, Sang-Ok, Kwak, Ho-Young

“…In this study, exergy and thermoeconomic analyses were performed on a Carnot battery system (CBS) comprising an air heat pump and steam turbine. The Carnot…”
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Study on the performance of a proton exchange membrane fuel cell related to the structure design of a gas diffusion layer substrate by JUNHYUN CHO, HWANYEONG OH, JAEMAN PARK, KYOUNGDOUG MIN, EUNSOOK LEE, JYOUNG, Jy-Young

“…Although characteristics of the gas diffusion layer (GDL) affect the performance of a proton exchange membrane fuel cell (PEMFC), mass transfer mechanisms…”
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Preliminary experimental study of a supercritical CO2 power cycle test loop with a high-speed turbo-generator using R134a under similarity conditions by Cho, Junhyun, Shin, Hyungki, Cho, Jongjae, Kang, Young-Seok, Ra, Ho-Sang, Roh, Chulwoo, Lee, Beomjoon, Lee, Gilbong, Kim, Byunghui, Baik, Young-Jin

“…Research on applying a supercritical carbon dioxide power cycle （S-CO2） to concentrating solar power （CSP） instead of a steam Rankine cycle or an air Brayton…”
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A scalable second order optimizer with an adaptive trust region for neural networks by Yang, Donghee, Cho, Junhyun, Lee, Sungchul

“…We introduce Tadam (Trust region ADAptive Moment estimation), a new optimizer based on the trust region of the second-order approximation of the loss using the…”
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An accurate and stable numerical method for option hedge parameters by Cho, Junhyun, Kim, Yejin, Lee, Sungchul

“…•The Feynman-Kac formula reduces truncation error in time direction.•Piecewise quadratic approximation gives the third-order convergence in asset…”
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Numerical analysis of the gas flow rate uniformity in the molten carbonate fuel cell (MCFC) under various conditions by Cho, Junhyun, Kim, Han-Sang, Min, Kyoungdoug, Park, Jong Hoon, Chang, In Gab, Lee, Tae Won

“…The gas distribution uniformity between anode channels in an indirect internal reforming type molten carbonate fuel cell (MCFC) is a crucial design parameter…”
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An operator splitting method for multi-asset options with the Feynman-Kac formula by Cho, Junhyun, Yang, Donghee, Kim, Yejin, Lee, Sungchul

“…In this paper, we propose an unconditionally stable numerical technique for a multi-dimensional Black-Scholes equation to price an option with high accuracy…”
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Application of heuristic algorithms for design optimization of industrial heat pump by Oh, Bong Seong, Cho, Junhyun, Choi, Bongsu, Choi, Hong Wone, Kim, Min Soo, Lee, Gilbong

“…The design parameters of heat pumps are related to each other nonlinearly or in a complicated manner; therefore, it is difficult to determine the optimal…”
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Design and optimization of CO2 pressurization system integrated with a supercritical CO2 power cycle for the CO2 capture and storage system by Muhammad, Hafiz Ali, Lee, Gilbong, Cho, Junhyun, Bhatti, Umair Hassan, Baik, Young-Jin, Lee, Beomjoon

“…[Display omitted] •An innovative energy efficient CO2 pressurization and utilization system is proposed.•The proposed design involves a vapor compression cycle…”
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Application of advanced exergy analysis for optimizing the design of carbon dioxide pressurization system by Muhammad, Hafiz Ali, Lee, Beomjoon, Cho, Junhyun, Rehman, Zabdur, Choi, Bongsu, Cho, Jongjae, Roh, Chulwoo, Lee, Gilbong, Imran, Muhammad, Baik, Young-Jin

“…The pressurization of carbon dioxide is an integral step of the carbon capture and storage process; a key technology frontier for the decarbonization of power…”
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Investigation of leakage reinjection system for supercritical CO2 power cycle using heat pump by Muhammad, Hafiz Ali, Lee, Beomjoon, Lee, Gilbong, Cho, Junhyun, Baik, Young-Jin

“…Supercritical carbon dioxide power cycle (sCO2) has recently attracted a great deal of interest owing to its compact size and potential for achieving high…”
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Development of the turbomachinery for the supercritical carbon dioxide power cycle by Cho, Junhyun, Choi, Munkyoung, Baik, Young-Jin, Lee, Gilbong, Ra, Ho-Sang, Kim, Byunghui, Kim, Minsung

“…Summary A supercritical carbon dioxide power cycle has been focused as a promising power cycle because of its compactness, a high efficiency, and a wide…”
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Performance improvement of supercritical carbon dioxide power cycle at elevated heat sink temperatures by Muhammad, Hafiz Ali, Cho, Junhyun, Cho, Jongjae, Choi, Bongsu, Roh, Chulwoo, Ishfaq, Hafiz Ahmad, Lee, Gilbong, Shin, Hyungki, Baik, Young-Jin, Lee, Beomjoon

“…The supercritical carbon dioxide power cycle has emerged as an advanced power generation system owing to its better efficiency, compactness, and capability to…”
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Investigating supercritical carbon dioxide power cycles and the potential of improvement of turbine leakage characteristics via a barrier gas by Muhammad, Hafiz Ali, Lee, Beomjoon, Imran, Muhammad, Cho, Junhyun, Cho, Jongjae, Roh, Chulwoo, Lee, Gilbong, Shin, Hyungki, Sultan, Haider, Baik, Young-Jin

“…•Energy efficient leakage management system for supercritical carbon dioxide turbine is designed.•The proposed design employs barrier gas method to reduce the…”
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