• Transactions of the Korean Society of Automotive Engineers
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• v.14 no.2
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• pp.127-135
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• 2006

We analyzed recyclability of the fuel tanks made from steel or aluminum alloy. For a comparison of the fuel tank recyclability, first we had analyzed the process of disassembly in a vehicle and evaluated its disassemblability. Then we evaluated the recyclability for reuse and withdrawal. The processes were more or less same owing to the similarity of fastening method of fuel tank and components. However, the fuel tank of the aluminum alloy was easier (about 5%) to disassembly than the fuel tank of steel. This could be attributed to the differences in weight of steel and aluminium. On light of the withdrawal and reuse, the fuel tank made up of steel needed to plate with zinc or lead due to its anti-corrosiveness. Hence, it required additional processes. In this paper, we were explaining the results of our on going research on the recyclability of fuel tanks made of steel and aluminum alloys. The differences that we found between the fuel tank made up of the aluminum alloy and steel were in their weight, recyclability, disassemblability, anticorrosive property, cost and productivity.

• Transactions of the Korean hydrogen and new energy society
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• v.30 no.5
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• pp.401-410
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• 2019

The operating conditions greatly impact the efficiency and performance of polymer electrolyte membrane (PEM) fuel cell systems and must be properly managed to ensure better performance and efficiency. In particular, small variations in operating conditions interact with each other and affect the performance and efficiency of PEM fuel cell systems. Thus, a systematic study is needed to understand how small changes in operating conditions affect the system performance and efficiency. In this paper, an automotive fuel cell system (including cell stack and balance of plant [BOP]) with a turbo-blower was modeled using MATLAB/Simulink platform and the sensitivity analyses of main operating parameters were performed using the developed system model. Effects of small variations in four main parameters (stack temperature, cathode air stoichiometry, cathode pressure, and cathode relative humidity) on the system efficiency were investigated. The results show that cathode pressure has the greatest potential impact on the sensitivity of fuel cell system efficiency. It is expected that this study can be used as a basic guidance to understand the importance of achieving accurate control of the fuel cell operating conditions for the robust operation of automotive PEM fuel cell systems.

• Journal of Digital Convergence
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• v.16 no.12
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• pp.257-266
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• 2018

The implication of this study is that the development and market participation of the next generation eco - friendly vehicles is accelerating, and consumers 'interest is increasing. Also, the product attributes of environment - friendly vehicles and the government's policy support for the next generation eco - friendly vehicles. The purpose of this study is to investigate the effect of purchasing behavior of eco-friendly vehicles on the product attributes of eco-friendly vehicles. Economic, image, functionality, and service convenience have positive effects on consumers' purchase intention. As a result of examining the moderating effect of the government support policy between the product attributes of environment - friendly vehicles and the purchase intentions of environment - friendly vehicles, the government or municipal government has no control effect such as vehicle price subsidy, vehicle tax subsidy, Carbon tax support to prevent emissions was found to have a moderating effect of supporting 10,000 won per ton, even if 5,000 won per ton was supported. This suggests that consumers who prefer to buy eco-friendly vehicles are more likely to have environmental factors.

• Journal of the Korean Professional Engineers Association
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• v.36 no.6
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• pp.68-71
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• 2003

세계의 석유 생산이 내일 갑자기 끊긴다면 우리에겐 어떤 일이 벌어질까？ 그야말로 전쟁터와도 같은 난리를 겪게 될 것은 뻔하다. 우리는 석유 자원이란 전혀 생산되지 않는다. 하지만, 우리의 산업부문 그리고 특히 운송부문을 주도하는 에너지의 바탕은 수입되는 석유이다. 엉뚱한 질문(？) 같지만 출퇴근길에 자동차를 몰면서 머리글의 질문을 한번쯤 자신에게 물어봐야 하지 않을까？ 에너지는 끊임없이 생겨나고 소멸하는 '에너지 사슬로 이어진다. 하지만, 화석연료는 다르다. 수억 연 동안 유기물질들이 지질시대를 거쳐야 석유 화석으로 변환되기 때문에 묻혀진 자원은 한정될 수밖에 없다. 뿐만 아니라 석유는 세계의 어느 특정한 지역 나라들에 편중돼 생산된다.(중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1999.10a
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• pp.422-423
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• 1999

최근 저유황 연료유의 공급과 청정연료의 사용 등으로 인해 1차 오염물질은 점차 줄어드는 추세에 있는 반면, 늘어나는 자동차와 급속한 산업화로 산업시설에서 배출되는 질소산화물과 탄화수소류, 휘발성 유기화합물(VOC) 등이 복잡한 광화학 반응을 통해 2차 오염물질을 생성함으로 대기오염의 문제가 심각하다.(중략)

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2004.05a
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• pp.759-763
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• 2004

High frequency noise of fuel pump has does claimed by user. But high frequency of fuel pump can't heat in the car. But this noise Is an offensive noise outside car. In this study is noise reduction used to mass law. Especially high frequency (for example BPF(blade pass frequency)) is influenced of this law. In detail used to transmission and add to mass according to mass law, reduced particular noise. As a result high frequency is down until can't perception.

• 한국신재생에너지학회:학술대회논문집
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• 2007.11a
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• pp.205-208
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• 2007

We aim to develop antifreezing coolant used to in the 200kW Fuel Cell system that is possible to starting at low temperature and that must not to be freezed under $-30^{\circ}C$, have high coductivity, excellent system protection ability and durability.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.11a
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• pp.433-434
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• 2003

1980년대 이후 대표적인 대기오염 지표인 아황산가스와 총먼지 오염도는 그동안 정부가 지속적으로 추진해 온 산업과 난방부문의 저황연료 등 청정연료공급 대책에 힘입어 개선되는 추세를 보이고 있다. 그러나 1990년대에 들어서는 자동차 증가와 유기 용재 사용의 급증으로 질소산화물, 휘발성유기화합물질 등의 배출이 증가하고 있으며, 이로 인한 대기오염의 심화 및 스모그와 시정장애 등 새로운 오염이 심각해지고 있고 이에 대한 대책이 시급한 실정이다. (중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1999.10a
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• pp.390-390
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• 1999

최근의 급속한 화석연료의 소비 증가로 각종 유기오염물질들이 다량으로 배출되고 있다. 대도시나 석유화학 관련업체가 밀집된 공단지역의 공해 관리를 위해서는 이러한 유기오염물질들에 대한 기초 자료의 확보가 시급히 이루어져야 할 것으로. 보인다. 대기 중 미량 유기오염물질들은 주로 자동차, 산업체, 난방연료, 쓰레기 소각 등 인위적 요인에 의해서 발생(Westerholm et al., 1991)되고 있으며 이 중 PAHs는 대표적인 유기오염물질이다.(중략)

• Proceedings of the KIPE Conference
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• 2010.11a
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• pp.257-258
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• 2010

최근 연료전지 기술의 발전으로 스택의 소형화 및 안전성이 확보됨에 따라 연료전지 자동차(FCEV)의 관심이 증가하고 있다. 본 논문에서는 변압기를 사용하는 풀-브리지 컨버터와 IPMSM 구동용 3상 인버터 구동 알고리즘을 제안하고 시뮬레이션을 통해 FCEV 적용 타당성을 검증 하였다.