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공회전 정지 기술이 적용된 굴삭기의 연비향상 효과 측정 방법 연구
강명철(M. C. Kang),김경수(K. S. Kim),이대엽(D. Y. Lee),최진구(J. K. Choi),강주영(J. Y. Kang) 유공압건설기계학회 2016 유공압건설기계학회 학술대회논문집 Vol.2016 No.11
While the main research topics in the 1970s and 1980s on the excavator were about maximizing the performances of the excavators, since the 2000s, the main research interests have been changed to the developments of the eco-friendly, high-efficient, and intelligent excavators. Moreover, due to many environmental problems, such as the oil depletion, high CO2 levels, and fine dust, the research field on the development of the eco-friendly technologies have been growing rapidly. Especially, because the energy consumption of the excavator is very high, many researchers are trying to develop energy-efficient excavators. In the present study, we apply an idle-stop technology to the excavator to maximize its energy efficiency, study experimental methods and conditions to measure the improvements of the energy efficiency with the idle-stop technology, and finally, verify the effectiveness of the idle-stop technology through experiments.
태양열 Hybrid Heat Pipe 흡수기의 설계와 제조 특성에 관한 연구
강명철(M. C. Kang),김진수(J. S. Kim),강용혁(Y. H. Kang),김낙주(N. J. Kim),유성연(S. Y. Yoo) 한국태양에너지학회 2006 한국태양에너지학회 학술대회논문집 Vol.- No.-
The dish/stirling system is used to convert solar energy directly to electrical energy. A hybrid sodium heat pipe receiver was designed for the dish/stirling system. In order to improve economic of solar power generation, stirling engine is required continuous operation and the receiver has to be provided with an additional combustion system. The hybrid receiver with a specially adapted combustion system is possible to 24 hr/day operation by a solar and gas-fired.<br/> The hybrid receiver has three different heat transfer surfaces of solar input, combustor heat input, and heat output to stirling engine. The inner cavity and external wall serve as absorber surfaces using collected irradiation and heat transfer surfaces for the gas heat flow, respectively. The container and wick structures are made of Stainless-310. The heat pipe was designed for a total thermal load of 35㎾ at 830℃ maximum temperature.