• Journal of Energy Engineering
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• v.25 no.1
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• pp.76-85
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• 2016

This study introduces the system layout and control strategy necessary to start and operate a fuel processor in a wide range of temperatures where a gasoline was selected as the fuel of fuel processor considering logistic support of Korea Army. The autothermal reformig(ATR) catalyst is heated to light-off temperature by combustion method in the initial stage. In order to ignite the gasoline and air mixture stably, the glow plug is installed after ATR catalyst. When the catalyst is increased to light-off temperature, the reformer is operated from initiation to steady state conditions as follows: Partial oxidation(POX) mode, partial ATR mode, full ATR mode. Finally the start-up and control strategy is validated by the operational test of gasoline fuel processor at low and room temperature. As a result the gasoline fuel processor is able to start-up within 40 min and to produce the reformate gas which has 37 ~ 42 vol.%(dry basis) of $H_2$ and 0.3 vol.% of CO.

• Journal of the KSME
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• v.44 no.11
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• pp.43-48
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• 2004

이 글에서는 수소 공급을 위한 연료프로세서와 연료전지 자동차내에서의 수소저장 방법, 그리고 수소 스테이션에 대해 간략히 알아본다.

• 전기의세계
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• v.31 no.4
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• pp.249-255
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• 1982

전기자동차의 마이크로 프로세서 제어시스템은 마이크로 프로세서가 엔진 피이드백제어, 순차제어, 연료계량, 축전지충전 및 일정한 기능진단의 역할을 한다는 것을 기술하였다. 이 마이크로 프로세서제어가 되는 운전 시스템은 연구실과 옥외주행시험을 통해서 그 우수한 성능이 확인되었다.

• Polymer Science and Technology
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• v.15 no.5
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• pp.571-577
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• 2004

• The Transactions of the Korean Institute of Power Electronics
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• v.13 no.6
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• pp.469-475
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• 2008

In this paper, control of small PEM(Proton Exchange Membrane) fuel cell stack by a microprocessor is introduced. The water management of fuel cell stack inside, a key technique in fuel cell control, can be achieved by adjusting the required air flow for fuel and cooling, and by purging the excessive water from the stack. It is very important to precisely control the BOS(Balance of Stack) since the stable operation of the fuel cell system mainly depends on it. In this study the fuel efficiency of the system is improved by the control of the system based on the measured air flow and purge cycle during the optimal operation and its effectiveness is proved by the experiments. The operating stability of the system is improved by the developed controller using a microprocessor and it is expected to be widely used for the control of small PEM fuel cell stack.

• Transactions of the Korean hydrogen and new energy society
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• v.27 no.5
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• pp.485-493
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• 2016

Recently submarine and unmanned underwater vehicle (UUV) are equipped with a fuel cell system as an air independent propulsion system. Methanol fuel processor can efficiently supply the hydrogen to the fuel cell system to improve the ability to dive. This study investigated the optimal conditions of the methanol fuel processor that may be used in the closed environment. For this purpose, the numerical model based on Gibbs minimization equation was established for steam reformer and three exhaust gas burners. After simulating the characteristics of steam reformer according to the steam-to-carbon ratio (SCR) and the pressure change, the SCR condition was able to narrow down to 1.1 to 1.5. Considering water consumption and the amount of heat recovered from three burners, the optimum condition of the SCR can be determined to be 1.5. Nevertheless, the additional heat supply is required to satisfy the heat balance of the methanol fuel processor in the SCR=1.5. In other to obtain additional amount of heat, the combustion of methanol is better than the increased of SCR in terms of system design.

• Journal of the KSME
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• v.22 no.4
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• pp.281-288
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• 1982

제품의 고급화, 정밀화, 생산성의 행상, 그리고 원가절감이 요구되는 요즈음 컴퓨터를 이용한 온라인 계측, 데이타처리 그리고 제어가 기계공학에서 차지하는 중요성이 점점 더 크게 인식되고 있다. 더욱 동력비와 연료비가 계속 상승하고 있기 때문에 건물에너지시스템, 화학공정시스템과 기타 에너지사용시스템의 온라인 모니터링(on-line moritiring)과 최적제어(에너지 사용비절감)을 위한)가 어느 때 보다도 중요성이 고조되고 있다. 본 해설을 통해서 마이크로프로세서 응용의 중요성과 일반적 방법을 잠시 생각해 보고자 한다.

• Proceedings of the KIEE Conference
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• 1987.07b
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• pp.1203-1205
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• 1987

가솔린 엔진용 전자 제어 에뮬레이션 시스템은 엔진의 운전 상태를 알려 주는 각종 센서로 감지한 정보를 A/D변환기를 통해 마이크로프로세서에 입력시키고, 이 정보를 이용하여 운전 상태를 분석한 후 엔진이 푤요로 하는 연료량, 점화시기, 배기가스의 재순환량, 공회전수 등을 전자적으로 제어하여 엔진의 최적제어를 실현시킴으로서 연료소비율 및 배기가스 중 공해물질 함량을 감소시키기 위한 장치이다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.18 no.5
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• pp.61-68
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• 2004

Recently, a fuel cell is remarkable for new generation system. The fuel cell is characterized by low voltage and high current. Therefor, for connecting to general load, it needs both a step up converter and an inverter. The proposed system consists of an isolated DC-DC converter to boost the fuel cell voltage to 380[Vdc] and a PWM inverter with LC filter to convert the dc voltage to single phase 220[Vac]. Also, bi-directional DC-DC converter for fuel cell generation system is composed to improve load response characteristic. In this paper, full bridge converter and the single phase inverter are designed and installed for fuel cell. Simulation and experiment verify that fuel cell generation system could be applied for the distributed generation.

• ETRI Journal
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• v.8 no.1
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• pp.34-43
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• 1986

에너지 관리 시스팀(Energy Management System)의 한 분야로서 보일러 제어를 들수 있는데, 보일러의 경우에 있어서 보일러 부하에 따른 연료의 연소 처리 제어, 압력차의 제어, 급수 제어 장치, 점화 등에 자동 제어가 적용되어 실질적인 보일러의 안전 운전 및 열효율을 개선시킬수 있다. 본고는 (주) 열연 보일러의 수관식 관류 보일러에 마이크로프로세서를 이용하여, 급수, 연소 제어를 구현한 내용이다.