• Aerospace Industry
• /
• v.85
• /
• pp.20-25
• /
• 2004

무인기 기술개발 및 저변 확대를 위한 ''''제3회 한국 로봇항공기 경연대회''''가 산업자원부 주최로 9월 19일 한국항공대학교에서 개최되었다. 그동안 임무수행 미달로 대상 수상자를 배출하지 못하고 있었는데, 이번 대회에서는 대상 심사기준에 요구되는 임무를 완벽하게 수행해 내는 팀이 속출, 치열한 경합을 벌이며 기술적 진전도 두드러졌다.

• Particle and aerosol research
• /
• v.16 no.4
• /
• pp.107-117
• /
• 2020

Based on the airborne measurement results over a coal fired power plant and steel work in Dangjin city, SO2 emission amounts of each site are estimated (top-down emission). Airborne measurements were carried out on May-June and October-November 2019. The estimated SO2 emission in 2019 for the power plant was 1502.1 kg/hr and that for the steel work was 2850.5 kg/hr, higher as much as a factor of 2.5 and 2.0, respectively, than the emission amounts provided by both facilities (bottom-up emission). The outcomes strongly illustrates that well designed airborne observations can serve a quantitative diagnostic tool for bottom-up emission estimates. Further research direction to improve the reliability of the top-down emission estimates is suggested.

• Aerospace Industry
• /
• s.107
• /
• pp.54-57
• /
• 2010

신형 항공기 개발비 상승, 환경변화에 따른 새로운 탄소배출 규제조건, 항공운송 시장의 급격한 변화 등에도 불구하고 21세기 항공우주산업은 춘추전국시대를 방불케 하고 있다. 사실상 세계 민항기 시장을 양분하고 있는 보잉과 에어버스의 아성에 크고 작은 항공기 제작사들의 거센 도전이 계속되고 있기 때문 특히 지구 온난화에 따른 새로운 환경규제는 거대기업 보잉과 에어버스의 생존조차도 위협하고 있다. 생존할 것인가 도태될 것인가? 급변하는 21세기 항공우주시장 환경에서도 1위 자리를 고수하기 위해 보잉과 에어버스가 야심차게 준비하고 있는 비밀무기, B787과 A350을 비교해 본다.

• Current Industrial and Technological Trends in Aerospace
• /
• v.7 no.2
• /
• pp.95-105
• /
• 2009

Fuel cells are applied to the propulsion system of aircraft based on environmental-friendly characteristics with low noise and zero emission of CO2, currently many kinds of UAV and small manned aircraft equipped with fuel cells are being developed. Fuel cells for aircraft typically classified into PEMFC(Proton Exchange Membrane Fuel Cell) type and SOFC(Solid Oxide Fuel Cell) type and the system is developed to adapt missions and operational conditions of aircraft. For UAV, various types of aircraft mostly based on PEM fuel cell technology are investigated for military or commercial uses, and the stability and endurance of system will be improved. For small manned aircraft, many researches are carried out to substitute the propulsion system by fuel cell, also some developments for the higher performance of APU of large commercial aircraft to apply fuel cells are in progress. In the future, a fuel cell aircraft will be expected to improve the reliability and efficiency with higher power density.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.20 no.3
• /
• pp.576-586
• /
• 2019

Airlines need to reduce their greenhouse gas (GHG) emissions because of the Paris Climate Agreement and ICAO CORSIA. This examined the degree of the strategic responses to which the airlines have made and the problems in the emission trading system (ETS). According to the analysis, the total amount of emission all the airlines made in the last three years was 116% more than the emission allowance imposed by the central government resulting in 10.7 billion KRW additional emission expense. Airlines would also face an increased carbon cost due to the implementation of ICAO CORSIA by purchasing an additional paid-in emission allowance in international routes. Although it is effective to retire the old aircraft early and induce the brand-new fuel-efficient aircraft to reduce GHG emissions, it is impractical in the short-term due to the tremendous amount of investment. To reduce the emission, airlines are washing engines, using ultra-light ULD and carts in the cabin, increasing the use of flaps and preventing the use of APU. On the other hand, these are very limited measures for reducing emissions according to the ICAO's mandatory emission target.

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 2008.04a
• /
• pp.660-661
• /
• 2008

• Journal of the Korean Society of Propulsion Engineers
• /
• v.13 no.3
• /
• pp.58-63
• /
• 2009

The global restriction on pollutant emissions and the soaring of crude oil price are expected to result in the change of future transportation system. Hydrogen is considered to be the leading candidate as an alternative energy source before other new alternative energy sources emerge. Scientists anticipate that hydrogen fuel gas turbine engine and fuel cell will be the power plant of the aircraft in the near future. To realize the aircraft powered by fuel cell system in the future, the technologies such as fuel cell with higher energy density, compressed gas or liquid storage system of hydrogen fuel, and efficient and lightweight electric motor have to be developed first.

• Proceedings of the Korean Society of Propulsion Engineers Conference
• /
• 2017.05a
• /
• pp.554-559
• /
• 2017

Recently, the global attention is focused on the development of the renewal aero-propulsion systems proved in the air pollution, the noise, the great operational cost, safety and risks. Especially, various study are conducting for the development of the advanced high power to weight ratio aircraft through the significant reduction of fuel consumption and upgrade of the propulsion efficiency, using the alternative propulsion system developments such as hydrogen and solar power system. The hybrid propulsion system can be the representative propulsion system which get the power sources by combining the merits of two or more power sources. In this study, the advancement trends, characteristics, design method which can be applied to the renewal future UAV development.

• Proceedings of the Korean Vacuum Society Conference
• /
• 2013.08a
• /
• pp.61.1-61.1
• /
• 2013

최근 지구온난화 및 원유 공급 감소 또는 고갈로 에너지 효율성 높고 저탄소 녹색성장을 주도할 수 있는 철도산업에 대한 관심이 고조되고 있다. 초고속 자기부상철도는 에너지 효율이 높은 경제적인 교통수단으로써, 단위 수송당(인-km) 온실가스 배출량이 자동차의 38%, 항공기의 17%에 불과하고, 같은 궤도운송시스템인 고속철도에 비해서도 77%에 불과하고 단위수송당 에너지 소비율이 항공기의 80% 수준에 불과하므로, 화석에너지의 고갈이 예상되는 미래에 장거리 고속 이동 수단으로써 중요성이 확대되고 있다. 또한, 비접촉 추진 방식이므로 바퀴 접촉식 고속철도에 비해서 유지보수 비용이 저렴하고(34%에 불과) 고속철도에 비해 10dB 이상 소음 발생이 적은 수명주기 비용 및 환경측면에서 기존 철도시스템에 비해서 경쟁력이 있으므로 시급한 개발과 활용이 요구되고 있다. 본 연구에서는 초고속 자기부상철도 연구와 관련된 국내외 연구동향과 함께, 국가연구개발사업으로 추진중인 초고속 자기부상철도 핵심기술개발사업에 대해 살펴보았다. 또한, 미래기술로 각광을 받고 있는 튜브트레인 기술에 대해서도 알아보았다.

• Journal of environmental and Sanitary engineering
• /
• v.10 no.3
• /
• pp.124-130
• /
• 1995

Air pollution problem by air craft was reviewed from emission gas components from air craft and pollutants amount generated in airport with the compareness of domestic transportation data by airplane and foreign data. It is reported that concentration of emission gas from air craft is lower than that of pollutants from automobile and factory. But transportation frequency is increasing rapidly in Korea. It is recommended that concerns should be taken on long- term of counterplan device about it.