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가역적 고온 고체산화물 연료전지-수전해 시스템 성능해석
강상규(Sanggyu Kang),이상호(Sangho Lee),김영상(Youngsang Kim),이영덕(Youngduk Lee),안국영(Kook-Young Ahn) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
Various types of the energy storage system (ESS) have been developing to compensate for the renewable power generation. The objective of the study is to develop the novel renewable hybrid system composed of the reversible solid oxide fuel cell (SOFC)/solid oxide electrolyser cell (SOEC) system and waste steam. In case of SOEC operation mode, the surplus electricity and the steam of 3 bar and 750 ℃ are supplied to the SOEC system to generate the hydrogen. The steam is generated by the boiler using the solid refuse fuel (SRF). The generated hydrogen is de-humidified by flowing through the heat exchanger and dryer, then heated and compressed to be stored at the metal hydride. In case of the SOFC operation mode, the hydrogen from the metal hydride enters to the SOFC system to generate the power. In order to improve the system efficiency, the off gas from the hydrogen electrode of the SOFC/SOEC system is recirculated by regenerative blower or ejector. And the system exhaust heat could be used for the hydrogen storage/release. The system analysis has been conducted to determine the system efficiency by Aspen Plus®. In order to achieve the system optimization, the efficiency of the various system configurations have been compared.
강상규(Sang-Gyu Kang) 한국동양정치사상사학회 2005 한국동양정치사상사연구 Vol.4 No.2
대한제국의 대외관계를 다루는 대부분의 연구는 부국강병을 이루어내지 못한 고종의 어떠한 외교적 노력도 실패할 수밖에 없었음을 공통적으로 지적한다. 그러면 과연 고종은 흔히 알려진 것처럼 너무 어리석어서 이러한 사실을 예측하지 못한 것일까. 본 연구는 다음과 같은 두 가지 문제를 해명하는 데에 초점을 맞추었다. 첫째,조선의 지도층 특히 고종에게 ‘독립국가’를 만들려는 의식적인 행위가 존재하고 있었는가, 둘째, 만일 존재하고 있었다면 고종이 국가의 ‘자주’와 ‘독립’을 국정수행의 가장 중요한 목표로 인식하기 시작한 것은 언제부터인가. 본 연구는 이를 위해 우선 고종의 정치의식과 대외관이 어떠한 과정을 통해서 형성되었으며 대체로 어떠한 내용을 담고 있었는지에 주목하면서, 새로운 대내외 정책의 주요내용은 무엇이었는지를 분석한다. 그리고 그것이 대한제국의 외교에 어떠한 정치적 사상적 영향을 미쳤는지 살펴보았다. Most studies to cover diplomacy of Daehanjeguk point out any kind of diplomatic effort of the King Kojong(r.1863-1907) which failed in 'rich nation and strong army' that there wasn't possibility to succeed. Well then, King Kojong was too foolish like having been known usually as expected, and wasn't there an ability to forecast this fact? This paper does in order to order a focus in elucidating two questions as follows. At first was there a conscious act with the existence in order to make 'independent country', in King Kojong? If there was it, when did he start to recognize national 'independence' as the most important aim? In order to approach two questions, this study did attention in process and the contents that political mind and foreign view of King Kojong were formed and analyzed trajectory of his domestic and foreign policy.
FTP-75 사이클에서의 고분자 전해질형 연료전지 차량의 동적 시뮬레이션
강상규(Sanggyu Kang),민경덕(Kyoungdoug Min) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Dynamic behavior of a PEMFC is crucial factors to ensure safe and effective operation. In this work, FTP-75 (Federal Test Procedure) mode was used to investigate the dynamic response of the PEMFC system. In order to investigate the effect of cell humidity and temperature on the performance of PEMFC, a dynamic model of a PEMFC system for automotive application has been developed by using the Matlab/Simulink<SUP>®</SUP>. The model is composed of a PEM unit cell, shell and tube humidifier, and thermal management system (TMS). PEM model considering two-phase transport was discretized into several control volumes in the through-plane to resolve energy balance, species conservation. The humidifier model was also discretized into two control volumes along the radial and axial direction. TMS consists of radiator, fan, and pump. The dynamic response of the PEMFC system was investigated by the simulation during the FTP-75 mode. In order to compare the simulation result with the experimental date, the velocity profile of the FTP-75 mode was compared to that from the FCEV model. The simulation results are in good agreement with the power profile with slight differences. It is expected this dynamic simulation of FCEV (Fuelcell Electric Vehicle) can contribute to establish the basic insight of developing the control strategy for vehicle application during various driving cycle.
강상규 ( Sang Gyu Kang ) 한국사회사학회 2006 사회와 역사 Vol.0 No.71
Diplomatic history is not a chronology of negotiations between international actors. Rather, it analyzes the actor``s mental structure or weltanschauung. In the 19th century there was a clash of two different world order what is called Chinese world order and modern international order in East Asia. Paradigm shift of East Asia in the 19th century is the transformation from world order on the basis of ceremony to modern international order by a sovereign state. This means that a reversal of "standard of civilization" occurred from the viewpoint of East Asia. That granted, why the Korean intellectual wasn``t able to concentrate on ``rich state and strong army`` building? This article is to analyze what king of historical, psychological elements, and how disturbed Korean in their positive reception of the new paradigm in the 19th century.