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외부 개질형 용융탄산염 연료전지 스택 시뮬레이션 모델 개발
김경택(Kyoung Teck Kim),한재영(Jae Young Han),탁현우(Hyun Woo Tak),유상석(Sang Seok Yu) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
The sharp cost reduction and aggressive marketing strategy of molten carbonate fuel cell system moves up the full commercialization of the stationary fuel cell system. Even though the operating strategies and design configuration of the MCFC system are significant for full commercialization, few study reported in the area of operating and control strategies. In this study, externally reformed MCFC stack is modeled in Simulink environment to understand dynamic response of the stack. As a matter of fact, Thermolib® of Simulink® library is used to model the stack that the library provides basic component for the modeling of the fuel cell stack. The electrochemistry with thermal behavior of original library is modified to properly simulate the physics of MCFC stack. The simulation result of the stack model are compared with the simulation result of ASPEN Plus® to validate the model. Finally, dynamic response over load change was investigated to determine the basic operating strategy of the MCFC stack.
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탁현우(Hyun Woo Tak),김경택(Kyoung Teck Kim),한재영(Jae Young Han),임석연(Seok Yeon Im),유상석(Sang Seok Yu) 대한기계학회 2013 大韓機械學會論文集B Vol.37 No.9
고분자 전해질 연료전지(이하 PEMFC) 시스템의 효율과 수명은 유입되는 공기의 습도에 직접적인 영향을 받는다. 그러므로 공기는 정상 운전조건에서 적절한 습도를 유지시켜 주어야 한다. 하지만 가습장치의 특성들에 대해서는 연구가 부족한 상태이다. 본 연구에서는 정상상태에서 다양한 입구조건에 따른 막 가습기의 수분전달 특성을 알아보기 위해 실험을 수행하였다. 실험에 이용할 평판형 막 가습기를 제작하였으며, 실험에 적합한 환경을 조성하였다. 우선 일정한 온도 조건하에서 막을 통과하는 수분 전달 능력을 실험하였고 이후 다양한 입구 조건에 따른 수분 전달 특성을 알아보았다. 본 실험에서 사용된 입구조건의 변수는 건공기와 습공기의 유량, 작동온도, 작동압력 및 유동배열이 있으며 각각의 입구조건이 가습기의 성능에 미치는 영향을 논의하였다. The efficiency and lifetime of a polymer electrolyte membrane fuel cell (PEMFC) system is critically affected by the humidity of the incoming gas, which should be maintained properly under normal operating conditions. Typically, the incoming gas of a fuel cell is humidified by an external humidifier, but few studies have reported on the device characteristics. In this study, a laboratory-scale planar membrane humidifier is designed to investigate the characteristics of water transport through a hydrophilic membrane. The planar membrane humidifier is immersed in a constant temperature bath to isolate the humidifier from the effect of temperature variations. The mass transfer capability of the hydrophilic membrane is first examined under isothermal conditions. Then, the mass transfer capability is investigated under various conditions. The results show that water transport in the hydrophilic membrane is significantly affected by the flow rate, operating temperature, operating pressure, and flow arrangement.
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탁현우(Hyun Woo Tak),한재영(Jae Young Han),김경택(Kyoung Teck Kim),유상석(Sang Seok Yu) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
The efficiency and life time of the proton exchange membrane fuel cell (PEMFC) system is critically affected by humidity of incoming gas which should be maintained properly at normal operating conditions but the characteristics of humidifier rarely reported. Water transport through the hydrophilic membrane is coupled phenomena of heat and mass transport. In this study, laboratory scale test bench is designed to investigate the characteristics of water transport through the hydrophilic membrane. At first, the mass transfer capability of the hydrophilic membrane is evaluated over various flow rates, humidities, and temperatures. In the experiment, the test bench is emersed in the constant temperature bath to isolate the effect of temperature variation between dry air and humid air. On the other hand, the capability of heat transfer is independently investigated with dry gases in both channels. The results shows the water transport of hydrophilic membrane is significantly affected by operating temperature, inlet gas humidities and flow arrangement.
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