• 한국신재생에너지학회:학술대회논문집
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• 2007.11a
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• pp.137-141
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• 2007

The startup behaviour of PEM fuel cells at subfreeze zero is one of the most challenging tasks to be solved before PEM fuel cell vehicle is commercialized. Automotive companies are trying to increase cold statup capability of fuel cell. In this study, we found out the design factor of the stack to increase cold startup capability using 4kW stack and then cold startup test was performed at the various shutdown condition and the various current. In order to test the cold startup possibility and capability in vehicle, we installed 80kW stack in the vehicle and this 80kW fuel cell vehicle was housed in an environmental chamber to investigate the characteristics of cold startup and driving. We found that it is possible for fuel cell vehicle with 80kW stack to self-heated cold startup and drive at $-15^{\circ}C$.

• Journal of Digital Convergence
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• v.17 no.1
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• pp.63-71
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• 2019

The purpose of this study is to reduce the barriers to entry into the government- supported startups and to contribute to the improvement of public policy services of the government. To do this, we identify the difficulties and problems that pre-founders are experiencing through startup cases of young entrepreneurs established in 2018, and provide practical help for pre-founders to experience their utility in preparation for government-supported startups, the need for public services to do so. And to propose a mentoring service to help the successful startup of policy-oriented user. This study is effective to adopt and apply the public service design process and methodology to the development of public policy service for the pre-founder who is preparing for government support centered startup. This study is meaningful that it presents one approach that can be considered when the government wants to develop and improve public policy services.