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10kW급 건물용 고체산화물연료전지(SOFC) 시스템 모델을 이용한 운전조건 최적화 연구
이율호,양찬욱,양충모,박상현,박성진 한국수소및신에너지학회 2016 한국수소 및 신에너지학회논문집 Vol.27 No.1
In this study, a solid oxide fuel cell (SOFC) system model including balance of plant (BOP) for building electric power generation is developed to study the effect of operating conditions on the system efficiency and power output. SOFC system modeled in this study consists of three heat-exchangers, an external reformer, burner, and two blowers. A detailed computational cell model including internal reforming reaction is developed for a planer SOFC stack which is operated at intermediate temperature (IT). The BOP models including an external reformer, heat-exchangers, a burner, blowers, pipes are developed to predict the gas temperature, pressure drops and flow rate at every component in the system. The SOFC stack model and BOP models are integrate to estimate the effect of operating parameters on the performance of the system. In this study, the design of experiment (DOE) is used to compare the effects of fuel flow rate, air flow rate, air temperature, current density, and recycle ratio of anode off gas on the system efficiency and power output.
운전조건 변화에 따른 고체제습 냉방 시스템 모델 파라미터 연구
이율호(Yulho Lee),인정현(Junghyun In),강상규(Sanggyu Kang),박성진(Sungjin Park) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
A desiccant cooling system can make a use of waste heat. The reusing of waste heat is one of the essential methods to conserve a using of grid electric energy and fossil fuel. Reducing an energy consumption of the cooling system in the summer season has an ability to avoid concentration of energy demands in the daytime. In this study, an on-design desiccant cooling system model is developed. A desiccant cooling system model is composed of a desiccant rotor, heat exchangers, an evaporative cooler, and blowers. A silica gel coated honeycomb rotor is adapted to the desiccant rotor model. A direct evaporative cooler model is applied to the system. The parameters: outdoor air temperature, outdoor humidity, regenerative heat duty, air flow rate, indoor heat duty are studied to analyze the effects on cooling capacity, Coefficient Of Performance (COP), and demand of regenerative heat duty.
연료전지 차량의 폐열 활용을 위한 제습냉방 시스템의 효용성 분석
이율호(Yulho Lee),형지원(Jiwon Hyung),김태우(Taewoo Kim),강상규(Sanggyu Kang),박성진(Sungjin Park) 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.11
Fuel cell vehicle (FCV) is clean energy power vehicle that exhaust only water and heat. Utilizing a heat energy from exhaust gas of FCV increases an efficiency of system. A desiccant cooling system is air conditioning system that energy sourced by thermal and water evaporative heat. In this study, a PEM FCV model is modified based on GT-suite FCV power train model and developed hybrid desiccant cooling system using Matlab-Simulink and verified using measured reference data. Based on developed model, System simulation is conducted in various driving cycles to verify effects on fuel consumption, fuel economy, exhaust heat, system efficiency in condition of air conditioning cooling operation. A hybrid desiccant cooling system need electric power as well as heat source, but lower electric power consumption of hybrid desiccant cooling system decreases a hydrogen consumption of FCV in summer season than electric powered heat pump FCV. As a result, a hybrid desiccant air conditioning cooling system for FCV increases a system efficiency and vehicle fuel economy.