• Title/Summary/Keyword: ocean eco-system

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Design of Ocean Fishways as Eco-movement Passages (생태이동통로로서의 해양어도의 설계)

  • Jang, Kyung-Soo;Lee, Jung-Eun
    • 한국신재생에너지학회:학술대회논문집
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    • 2009.06a
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    • pp.624-627
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    • 2009
  • Design of ocean fishways as eco-movement passages for turbine structures, sluice structures and barrages of a environmentally-friendly tidal power system through which fish can pass are suggested. The ocean fishways comprise a plurality of fishways to allow fish to move between the sea-side and the lake-side of the barrages and turbine structures and sluice structures. It is demonstrated that the inventive ocean fishways are cost effective to construct and environmentally-friendly eco-movement passages for fish and benthos to move between sea-side and lake-side without passing through the turbine blades of a tidal power plant in operation.

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A Study for the Application of Ammonia Propulsion Model: Focusing on the Training Ship (암모니아 추진 모델 적용을 위한 연구: 실습선을 중심으로)

  • GA-YOUNG YANG;JAE-WOO AHN;SUNG-BIN HONG;KANG-HYEON KIM;JAE-MIN PARK;BO RIM RYU;HO KEUN KANG
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2022.11a
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    • pp.156-157
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    • 2022
  • Currently, due to the increase in GHG emissions, the global weather phenomenon is constantly occurring, and each international organization is trying to reduce 온실가스 through various regulations to reduce GHG. To comply with the regulations, eco-friendly ships are currently being studied to reduce GHG. This paper models the fuel propulsion system of NH3 sofc fuel cell propulsion ship through the case study of eco-friendly ships, especially NH3 fuel cells, and provides information on how NH3 sofc fuel cell propulsion ships can benefit energy efficiency and decarbonization compared to existing FO vessels.

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Performance Evaluation and Technical Development of Eco-environmental Photovoltaic Leisure Ship with Sail-controlling Device With Respect to Solar-Hybrid Generating System (풍력 Sail 돛 제어장치를 이용한 친환경 태양광 레져보트의 하이브리드 발전시스템 관련 성능평가에 대한 연구)

  • Oh, Kyoung Gun;Moon, Byung Young;Lee, Ki Yeol
    • Journal of Ocean Engineering and Technology
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    • v.30 no.1
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    • pp.57-67
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    • 2016
  • As a new technical approach, an attempt was made to realize a photovoltaic system for an eco-environmental leisure ship by simultaneously actuating nine photovoltaic solar panels in association with the application of a sail-controlling system using wind energy. In this approach, the photovoltaic system consisted of a solar module, an inverter, a battery, and the relevant components, while the sail-controlling device was equipped with sail up/down and mast turning systems. The previously mentioned eco-environmental leisure ship utilizes a photovoltaic hybrid system that uses solar and wind energy as renewable energy sources. Furthermore, this research included a performance evaluation of the manufactured prototype, the acquisition of the purposed quantity values, and development of the purposed items. The significant items, including the sail up/down speed (seconds) and mast turning angle (degrees) were evaluated for a performance test. A wind direction sensitivity of 90% and maximum instant charging power of 900 W were also obtained in the process of the performance evaluation. In addition, the maximum sail time was also evaluated in order to acquire the optimum value. The performance evaluation showed that the prototype with a photovoltaic hybrid system was suitable for sailing an eco-environmental leisure ship using solar and wind energy.

Study on a Fully Electrified Car Ferry Design Powered by Removable Battery Systems Considering Domestic Coastal Environment

  • Hong, Jang Pyo;Kim, Young-Shik;Shim, Hyung-Won;Kang, Hee-Jin;Kim, YunHo;Kim, Gyu Bum;Cho, Seongpil
    • Journal of Ocean Engineering and Technology
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    • v.35 no.1
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    • pp.1-12
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    • 2021
  • As increasing the international community's awareness of greenhouse gas reduction, the demand for eco-friendly ship fuel has accelerated recently. The fundamental aim of this study is to develop a new type of fully electrified ferry for passengers and cars considering Korean domestic coastal environmental conditions. Several technical difficulties are encountered in applying a fully electric propulsion system based on removable battery systems into a ship due to limitations imposed by the batteries' size and capacity. This paper reviews and analyzes marine environment regulations strengthened recently, technology trends related to fully electric propulsion vessels in each country, and Korean domestic coastal environments. We propose a new fully electrified car ferry design with a displacement of 400 t applied in Korea. It is powered by removable battery systems pre-charged in a safe inland charging station. The mobile battery system is developed to enable roll-on and roll-off using wheels. The characteristics of the ship motion are analyzed based on the weight and location of the battery systems. We expect our battery systems to be applicable to larger ships in the future.

Study of a Photovoltaic System as an Emergency Power Supply for Offshore Plant Facilities (해양플랜트 설비의 비상전원공급을 위한 태양광 발전시스템 연구)

  • Choi, Gun Hwan;Lee, Byung Ho;Jung, Rho-Taek;Shin, Kyubo
    • Journal of Ocean Engineering and Technology
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    • v.32 no.4
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    • pp.279-286
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    • 2018
  • The use of eco-friendly energy in the offshore plant system is expanding because conventional generators are operated by fossil fuel or natural gas. Eco-friendly energy, which replaces existing power generation methods, should be capable of generating the power for lighting protection equipment, airborne fault indication, parameter measurement, and others. Most of the eco-friendly energy used in offshore plant facilities is solar and wind power. In the case of using photovoltaic power, because the structure must be constructed based as flat solar panels, it can be damaged easily by the wind. Therefore, there is a need for a new generation system composed of a spherical structure that does not require a separate structure and is less influenced by the wind. Considering these characteristics, in this study we designed, fabricated, and tested a unit that could provide the most efficient spherical photovoltaic power generation considering wind direction and wind pressure. Our test results indicated that the proposed system reduced costs because it did not require any separate structure, used eco-friendly energy, reduced carbon dioxide emissions, and expanded the proportion of eco-friendly energy use by offshore plant facilities.

A Study on the Improvement and Application Plans of Korean Nuclear Safety Regulations for their Application on Nuclear powered ships (원자력 선박 적용을 위한 국내 원자력 안전규제 개선 및 적용방안에 관한 고찰)

  • Jaehyun Kim;Junseop Jang;Seungmin Kwon;Sinhyeong Kim
    • Journal of Radiation Industry
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    • v.18 no.2
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    • pp.109-115
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    • 2024
  • As a global effort for eco-friendly, the ship building is making great efforts to develop ships using low-carbon, eco-friendly alternative fuels. Nuclear energy, one of several eco-friendly alternative energy sources, is evaluated as an effective alternative for future ships by minimizing carbon emissions and securing economic feasibility with low power generation cost. However, although appropriate regulatory requirements are necessary for commercialization of nuclear powered ships, there are currently no regulatory requirements for nuclear powered ships in Korea. In this study, accordingly, domestic and international regulatory requirements related to nuclear powered ships were reviewed, matters to be considered in terms of safety when developing domestic marine nuclear reactor regulatory requirements were derived, and a licensing regulatory system for nuclear powered ships was derived.This study is expected to be used as basic reference data when developing regulatory requirements for nuclear powered ships.

Technology Assessment for Design of an Environment-Friendly Vehicle for Tidal Flat Zone (친환경성 갯벌차량 설계를 위한 기술 분석)

  • Yeu, Tae-Kyeong;Hong, Sup;Kim, Hyong-Woo;Choi, Jong-Su;Lim, Dong-Il
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • 2006.11a
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    • pp.257-260
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    • 2006
  • West coast of Korea belongs to the five largest tidal-flat zones in the world. Aiming at the efficient management and preservation of the eco-system and the enhancement of the bio-productivity of the tidal-flat zones, development of a environment-friendly vehicle for tidal-flat area is being attempted. This paper deals with the description of the characteristics of the tidal-flat zones of west coast of Korea, the technology assessment of the related products in the ATV(All-Terrain Vehicle) market, the demand assessment for the resident people.

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Analysis of Life Cycle Assessment (LCA) for Sustainable Basic Design Alternatives for Medium-Sized LNG-DF Propulsion Ship (LNG-DF추진 중형선박의 지속가능한 기본설계 대안을 위한 전과정평가(LCA) 분석)

  • Ki Seok Jung;Dong Kun Lee
    • Journal of the Society of Naval Architects of Korea
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    • v.60 no.5
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    • pp.358-366
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    • 2023
  • Due to the International Maritime Organization's (IMO) environmental regulations on NOx and SOx, LNG-fueled eco-friendly ships are gaining attention worldwide, and various eco-friendly ships are being proposed and demanded for conversion to eco-friendly ships in Korea, as the eco-friendly ship law has recently been enforced. In this study, the initial basic design was performed to convert an existing Marine Gas Oil (MGO) fueled ship into an LNG-DF propulsion ship, targeting medium-sized ship, to select the fuel tank capacity and main dimensions and appropriate fuel ratio between the two fuels. In particular, Sustainable basic design method considering environmental impact were proposed by performing a Life Cycle Assessment (LCA) throughout the design process, and various design options were compared and analyzed to meet different design conditions by applying them.

Trends in safety improvement technologies for an electric propulsion system of eco-friendly ships (친환경 선박용 전기추진시스템 안전성 향상 기술개발 동향)

  • Kim, Sehwan;Choi, Gilsu;Lee, Jae Suk
    • Journal of IKEEE
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    • v.25 no.3
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    • pp.556-564
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    • 2021
  • This paper presents trends of safety improvement technologies for an electric propulsion system of eco-friendly ships. As an effort to reduce a green house effect, demands for eco-friendly ships have been increased. An energy storage system (ESS) is one of key systems in an eco-friendly ship and a lithium-ion battery generally used in an ESS system due to its high power density and efficiency. However, a lithium-ion battery is considered as one of reasons for ESS fire hazard. Since a fire extinguishing facility is especially limited in the ocean, safety issue in an eco-friendly ship is important. In this paper, recent safety improvement technologies for traction motors, ESS batteries and structures for eco-friendly ships are presented.

Cruise Look Design Inspired by the Ocean Life Motif (해양 생물 모티브를 응용한 크루즈 룩 디자인)

  • JeKal, Mee;Lee, Youn-Hee
    • The Research Journal of the Costume Culture
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    • v.16 no.4
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    • pp.634-645
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    • 2008
  • The purpose of this study was to develop cruise look design inspired by the ocean life motif using by computer CAD system. Domestic and international brands were selected for this study researching cruise line collection. A variety of literature and online site for concept of cruise look and sustainable design was studied. Adobe Illustrator CS2 and Adobe Photoshop CS2 program were used for cruise look design through analysis of 07/08 S/S trend. The diffusion of cruise look reflects a societal trend to be changed life pattern. The results of this study are as below. First, as this society has become modernized with advancement of technology, people have been increasingly interested in the pursuit of happiness and the concept of 'quality of life', thereby creating a new trend of consumption culture. As a result, fashion market place changed targeting sensible and self-enrichment customers. Second, as combining rapid technological innovation and mass production, industrial design caused environmental pollution and the problems are being worsen. Fashion design has same problems and led to eco-friendly design by the large. Third, as the change of style influenced by economic and social condition, cruise look re-defined and became more common. The change of various fields led to fashion market place should be changed. The cruise look design using computer program will give more benefits to many designers.

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