• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.2
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• pp.286-294
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• 2021

The International Maritime Organization (IMO) has been seeking measures to prevent climate change caused by shipping and actively discussing the initial strategy of reducing ship greenhouse gas emissions adopted in 2018. Member states are proposing various reduction measures in the IMO's 5th International Working Group on the Reduction of Greenhouse-gas emissions. However, each member country's method of measuring impact assessment differs, making it impossible to objectively compare impact assessment by country. As such, various measures have been proposed by each country to reduce greenhouse gas emissions, and it is necessary to determine a standard impact assessment measurement method that can be applied to all countries before 2023, when IMO's greenhouse gas reduction strategy is implemented. Therefore, this study seeks to develop detailed guidelines for impact assessment to objectively compare the impact assessment results of ships' greenhouse gas reduction measures. Drawing detailed guidelines that can compare the effectiveness of each country's reduction strategies will enable the IMO leading marine environment GHG reduction.

• Journal of the Society of Naval Architects of Korea
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• v.60 no.6
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• pp.397-405
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• 2023

As interest in greenhouse gas reduction has increased in all sectors, the discussion of the International Maritime Organization (IMO) to regulate pollution by ships is attracting attention in international shipping. At the 80th IMO MEPC held in July 2023, the 「2023 IMO Strategy for the Reduction of Green House Gases from Ships (MEPC. 377(80))」 was adopted, which included the net-zero target around 2050, and a firm intention to the decarbonization of the international shipping sector showed. In particular, energy, fuel and technology targets for zero or near-zero greenhouse gas emissions by 2030 were added as new targets, and total greenhouse gas emission checkpoints for 2030 and 2040 were added as an indicator for achieving the 2050 target. The IMO's goal setting for 2030, which is about seven years away, will impose a lot of technical, economic, and political burden despite the decarbonization technology of international shipping, which has grown to a significant level in a short period of time. Accordingly, this paper presents the comprehensive impact of the 2023 IMO GHG Strategy on international shipping.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.11a
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• pp.139-140
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• 2019

세계경제는 인류의 지속가능한 성장을 위해 2020년을 기점으로 저탄소 경제체제에서 무탄소(에미션 제로·Emission Zero) 경제체제로 변화를 꾀하고 있는 상황이다. 이러한 변화는 해운분야에서도 예외가 아니다. 국제해사기구에서 선박온실가스 규제라고 할 수 있는 에너지효율 규정이 해양오염방지협약 부속서 6의 제4장(에너지 효율관리)으로 2011년 개정·채택된 것을 시작으로 최근 2030년까지 40%감축, 2050년까지 50% 감축이라는 온실가스 감축목표를 설정하여 본격적인 온실가스 감축을 위해 노력하고 있다. IMO는 감축목표를 달성하기 위한 단기조치, 중·장기 조치를 2023년까지 완성한다는 목표를 설정하고 장애요인 분석, 국가별 영향평가, 역량강화 및 기술지원과 연구개발에 관한 로드맵을 포함한 최종 전략 수립을 진행하고 있으나 문제는 국제해사기구(IMO) 2030 온실가스 감축목표 달성은 현재 사용되고 있는 화석연료로는 불가능하기 때문에 선박추진 연료로써 수소, 연료전지, 메탄올 등 대체에너지 개발을 대폭 지원하는 국가의 정책전환이 시급하며 이를 구체화할 수 있는 정책개발이 시급하다.

• Bulletin of the Society of Naval Architects of Korea
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• v.55 no.2
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• pp.24-27
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• 2018

• Journal of the Korean Society of Marine Environment & Safety
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• v.30 no.1
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• pp.135-145
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• 2024

At the 80th session of the MEPC, the IMO presented an enhanced GHG reduction strategy. The strategy is more specific and robust than the initial strategy presented at the 72nd session. The IMO aims to achieve 'Net Zero' GHG emissions from international shipping by 2050. In this study, a risk assessment was conducted for representative green fuels, namely. LNG, hydrogen, methanol, and ammonia. The fuzzy method was used to resolve the subjective ambiguity of results from the survey of the experts, and the positive and negative ef ects of the fuzziness were derived through the TOPSIS method. Finally, the closeness coefficients of the considered alternative fuels were determined using the Vertex method. As a result, methanol, LNG, hydrogen, and ammonia were preferred. This study suggests that the proposed approach can be used as a collective decision-making tool for selecting alternative fuels.

• Journal of Korea Ship Safrty Technology Authority
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• s.27
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• pp.15-24
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• 2009

최근 IMO에서는 온실가스 배출을 규제화 하고자 하는 동향이 있으며 조만간 선박에서 온실가스 배출의 규제가 실현될 것으로 예상된다. 선박에서 배출되는 온실가스는 CO$_2$가 대부분을 차지하고 있으며 세계경제상황에 따른 영향이 고려되지만 지속적으로 증가추세에 있는 CO$_2$를 감소시키기 위한 아국의 대처방안이 필요한 시점이다. 또한 향후 발효될 EEDI를 소개하고 결과적으로 GHG를 저감시키기 위한 방안인 선형개선, 폐열회수시스템, 친환경연료사용기관, SEMP 등에 관한 내용을 다루어 보았다. 이 보고서에서는 GHG를 비롯한 NOx, SOx 및 PM과 같은 유해배출물질을 Top Down방식으로 평가함으로써 선박에서 기인하는 대기오염물질 관련 국내정책 및 해운산업의 장기적인 발전전략에 유용하게 사용될 것으로 기대한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.164-166
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• 2018

최근 전 세계적으로 수송수단과 산업시설에서의 배출로 인한 대기오염의 심각성을 강조하고 있다. 특히 항만과 공항에서도 대기오염의 중요성을 인지하고 있고 지역별 대기오염물질 배출 및 대기오염도 현황을 분석하여 각 시설에서의 종합관리방안을 도출하고 있다. 2020년부터 시행되는 국제해사기구(IMO)의 선박에서 배출되는 온실가스 즉, 황성분을 포함한 연소배기가스 중 CO2, SOX,NOX, PM2.5의 배출규제에의 대응과 배출규제해역(ECA)제도 도입에 따른 업계와 정부, 학회의 대비도 빠르게 진행되고 있다. 부산항에서도 항내계류선박과 하역장비에서의 오염물질 배출을 억제하기 위한 대체전력공급(AMP, Cold Ironing)에 대해 대응하고 있다. 본 연구는 도시주민의 건강을 위협하는 미세먼지(PM2.5)의 심각성과 배출가스의 저감을 위한 방안을 소개하고 오히려 이를 해운항만에서의 4차산업 발전의 계기로 대응하도록 하는 방향을 제시하고자 하였다. 산업화 과정에서 필연적인 대기오염을 저감시키는 방안이 새로운 해양산업으로 전환하기를 기대한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.691-692
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• 2022

IMO 온실가스 규제는 현존선박과 친환경 신조선박의 온실가스 배출에 대하여 차별적으로 규제함으로써 시장경쟁력에 영향을 주어 선주들에게 친환경 신조선박으로 전환을 가속시키고자 하는 것이 핵심이다. 크게 기술적 조치와 운항적 조치, 그리고 시장적 조치가 있으며 세가지 대안 모두 비용적인 측면에서 선주에게 재무적 부담이 될 것으로 예상된. 따라서 본 연구는 온실가스규제에 따른 재무적 부담을 정량적 추정하여 기업의 향후 대응방안과 정책적 지원방안에 대한 제언을 하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.11a
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• pp.158-159
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• 2022

Due to the climate crisis, various environmental regulations including greenhouse gas reduction are in effect. This is not limited to any specific industry sector, but is affecting the entire industry worldwide. For this reason, the IMO and governments of each country are announcing strategies and policies related to the shipbuilding and shipping industries. The current regulations can be partially resolved through additional facilities such as scrubbers while using existing fossil fuels, but ultimately, the emission of greenhouse gases such as CO2 from the exhaust gases generated by ships must be restricted through energy conversion. To this end, it is necessary to develop fuels that can replace traditional fuels such as oil and natural gas. Among them, hydrogen is attracting attention as a clean energy that does not emit pollutants when used as a fuel. However, hydrogen has a wide explosive range and a fast dispersion speed, so research on this is necessary. Therefore, in this paper, when hydrogen leakage occurs in the fuel preparation room of a hydrogen-powered ship, the trend was analyzed and the ventilation characteristics were investigated.

• Journal of the Korean Society of Marine Environment & Safety
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• v.28 no.4
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• pp.648-656
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• 2022

As environmental regulations such as the International Maritime Organization (IMO)'s strategy to reduce greenhouse gases(GHG) are strengthened, technology development such as eco-friendly ships and alternative fuels is expanding. As part of this, ship propulsion technology using energy reduction and wind propulsion technology is emerging, especially in shipping companies and shipbuilders. By securing wind propulsion technology and introducing empirical research into shipbuilding and shipping, a high value-added market using eco-friendly technology can be created. Moreover, by reducing the fuel consumption rate of operating ships, GHG can be reduced by 6-8%. Rotor Sail (RS) technology is to generate a hydrodynamic lift in the vertical direction of the cylinder when the circular cylinder rotates at a constant speed and passes through the fluid. This is called the Magnus effect, and this study attempted to propose a plan to increase propulsion efficiency through a numerical analysis study on turbulence flow characteristics around RS, a wind power assistance propulsion system installed on a ship. Therefore, C_L and C_D values according to SR and AR changes were derived as parameters that affect the aerodynamic force of the RS, and the flow characteristics around the rotor sail were compared according to EP application.