• Title/Summary/Keyword: 에너지효율설계지수

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Recent International Development on the Technical and Operational Measures of IMO's CO2 Emission Control From Ships (IMO의 선박기인 CO2 배출 규제 동향 및 고찰)

  • Jung, Rho-Taek
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.14 no.1
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    • pp.65-71
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    • 2011
  • Since 2003, policies and practices related to the reduction of CO2 gas emission from ships has been discussing by the International Maritime Organization. The representative emission index and indicator are the EEDI (Energy Efficiency Design Index) for the new ships and EEOI (Energy Efficiency Operational Indicator) during the voyage. For the CO2 emission monitoring system, the SEEMP (Ship Energy Efficiency Management Plan) is also on the table. This global preparations to reduce theCO2 emission is not except for the surface transportation. This research report elucidates the recent stream on the IMO CO2 emission from ship and detail explanation on the EEDI and EEOI.

Development and its Application for Energy Efficiency Operation Indicator and Energy Efficiency Design Index Monitoring System on the Ship (선박의 에너지효율운전지표와 에너지효율설계지수의 모니터링 시스템 개발과 그 응용)

  • Lee, Don-Chool;Kim, Eoue-Sek;Joo, Ki-Se;Nam, Jeong-Gil
    • Journal of Advanced Marine Engineering and Technology
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    • v.34 no.4
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    • pp.500-507
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    • 2010
  • Regard to the global warming, the shipping industries are progressed the dedicated endeavor to reduce greenhouse gas. As the study results of 2009 GHG study team, the $CO_2$ emission of shipping industries exceeded slightly 1.0 billion ton during one year(2007) and it is 3.3% of total $CO_2$ amount exhausted from all industries. This paper are introduced the energy efficiency design index / operation indicator monitoring system(EDiMS) which matched with EVAMOS software released by the dynamics laboratory of Mokpo maritime university. EDiMS can continuously be monitored amounts of $CO_2$, NOx, SOx, and PM emitted from ship and it can be applied as the useful tool of the inventory work of air pollution and the ship energy management plan for the mitigation or reduction of ship emission.

Numerical Simulation for Improvement in Resistance Performance by Bulb Retrofit under Optimal Trim Conditions (최적 트림 조건하에서 벌브개조를 통한 선박저항성능 개선 연구)

  • Park, Hyunsuk;Seo, Dae-Won
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.28 no.6
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    • pp.1070-1077
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    • 2022
  • The International Maritime Organization has recently strengthened its marine environment regulations. The energy efficiency index has long been an important indicator of ship design, and now, energy efficiency is being enforced for existing ships as well as new ships. To increase the energy efficiency of existing ships, methods such as retrofitting the bow bulb, selecting an optimized trim during ship operation, and installing an energy saving device have been applied. In this study, the ship resistance was numerically simulated using computational fluid dynamics (CFD) under various bow and stern trim conditions. In addition, the bulb was redesigned to further improve the resistance performance under the selected trim conditions. When the improved bulb was applied, the effective horse power increased by approximately 5%. It is, however, necessary to verify whether the redesigned bulb can reduce ship resistance in waves.

전방향 이동로봇의 에너지효율 개선을 위한 제어방법

  • 김정근;송재복
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.05a
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    • pp.23-23
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    • 2004
  • 이동로봇의 독립성과 움직임에 자유도를 높이기 위해서 축전지를 이동로봇에 탑재하고, 이를 이용하여 동력을 공급하는 경우가 대부분이다 이러한 경우에 에너지 효율은 제한된 동력을 가지는 시스템의 가동 가능시간을 결정하는 중요한 성능지수가 된다. 또한, 이동로봇의 최대속도나 최대가속도, 등판각도 등의 설계 사양을 소형의 모터를 사용하여 만족시키는 것은 이동로봇의 소형화, 경량화 및 시스템의 가격을 낮추기 위해 필수적이다. 그러나 이동로봇의 최대의 문제점 중의 하나인 소비전력의 감소에 대한 문제는 활발히 연구되고 있지 않다.(중략)

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선박의 속도 저하를 고려한 운항효율제고에 관한 연구

  • Gong, Gil-Yeong;Lee, Bo-Gyeong;Lee, Yun-Seok
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2013.06a
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    • pp.198-200
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    • 2013
  • 최근 국제해사기구(IMO)의 해양환경보호위원회에서(MEPC)는 선박에서 대기로 방출되는 CO2의 양을 최소로 하기 위해서 신조선 설계 건조시 에너지효율지수(EEDI : Energy Efficiency Design Index for new ships), 에너지 효율지표(EEOI : Energy Efficiency Operational Indicator), 그리고 에너지 효율관리 계획(SEEMP : Ship Energy Efficiency Management Plan) 지수들을 이용하여 전 세계 이산화탄소 배출 규제 방침을 운영하고 있다. 이러한 환경규제 강화와 발맞추어 세계 각국은 지속적인 Green-ship의 개발과 저탄소 고효율 선박의 운항을 위해 연구와 노력한다. 본 연구에서는 선박이 움직이는데 있어 동력이 시작되는 부분과 그 힘이 전달되어 운항자의 의식이 반영되어 선체의 이동으로 이어지기까지 흐름에 대해 도식 및 수식으로 정리하였다. 그리하여 해상의 상태와 이에 따른 운항결정이 어떤 결과를 초래할 수 있는지 살펴보고 이 부분에서 운항효율을 증대시킬 수 있는 부분에 대해 모색해 보았다. 또한 엔진의 상태에 따른 연료 절감율에 대해 살펴보고 보다 경제적 운항을 위한 적정 RPM과 속도 등에 대해서 고찰해 보았다. 이 같은 정리를 통해 앞으로의 Echo-ship, Green-ship의 연구방향에 대한 초석으로 삼고자 한다.

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Applicability of reliability indices for water distribution networks (공급부하 시나리오에 따른 상수관망 신뢰도 지수의 적용성 분석)

  • Jeong, Gimoon;Kang, Doosun
    • Journal of Korea Water Resources Association
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    • v.50 no.7
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    • pp.441-453
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    • 2017
  • Water distribution networks (WDNs) supply drinking water to end users by maintaining sufficient water pressure for reliable water supply in normal and abnormal conditions. To design and operate WDNs in efficient way, it is required to quantify water supply ability of the network. Various reliability indices have been developed and applied in this field. Most of the reliability indices are calculated based on the energy within a network; that is, the total energy entered the network, the energy dissipated through water supply process, and the energy finally supplied at the nodes, etc. This study explains the energy composition in WDNs and introduces three well-known reliability indices developed based on the energy composition of the network. The three indices were applied to a study network under various demand loading scenarios that could occur in real-life operation practices. This study aimed to investigate the applicability of the reliability indices under abnormal scenarios and proposed to illustrate the spatial distribution of the system reliability in more intuitive way for proper responses to the abnormal situations.

Design and Performance Analysis of Ring Stator for Crude Oil Carriers (원유운반선용 Ring Stator 설계 및 성능 연구)

  • Kang, Jin Gu;Byun, Tae Young;Kim, Moon Chan
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.27 no.2
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    • pp.369-376
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    • 2021
  • The International Maritime Organization has developed the Energy Efficiency Design Index, an index related to carbon dioxide emissions, to enforce regulations on newly built ships. In this study, a new type of energy-saving device called the ring stator was used for 158k crude oil carriers, whose hull form was developed as a very thin after-body hull to reduce the resistance by delaying separation. The Energy-Saving Device (ESD) particularly involving the duct, is not adapted to the thin-after body hull form-like container ship. This new ring stator was developed considering these characteristics. A parametric study was conducted through Computational Fluid Dynamics (CFD) analysis using the Star-CCM+ program, and approximately 3.4 % improvement in propulsion efficiency was achieved. Further optimization investigations and experimental studies should be conducted in the future.