• Title/Summary/Keyword: Small ship

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The Wave Power Generator on Small Ship for Charging Engine Start-Up Battery (엔진 시동용 소형선 탑재형 파력 발전 시스템)

  • Kisoo, Ryu;Sungjin, Kang;Byeongseok, Yu
    • Journal of the Society of Naval Architects of Korea
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    • v.59 no.6
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    • pp.439-446
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    • 2022
  • Efforts to reduce carbon dioxide(CO2) emissions are being carried out due to climate environmental problems. Eco-friendly ships are also being developed, and various energy saving measures have been developed and applied. In ships, researches have been conducted in various fields such as electric propulsion system and energy saving devices. In addition, the development of ships using various renewable energy, such as kite using wind power and wind power generation, has been carried out. This paper proposes a plan to use renewable energy for ships by applying wave generators to small ships. In 2016, 130 small domestic ships drifted by sea due to discharge of starting storage batteries, and discharge cases accounted for the largest portion of the causes of domestic ship accidents. This is due to the excessive use of storage batteries for starting the main engine by departing in a weak storage battery state for small ships. Accordingly, two type wave power generators - opened flow wave power generator and enclosed vibrator type wave power generator - are developed for charging a starting storage battery when the ships are stationary at sea or port. Opened flow wave power generator utilizes the flow of fluid in the ship by using wave induced ship motion. Enclosed vibrator type wave power generator utilizes the pendulum kinetic energy located in a ship due to wave induced ship motion.

A Study on the Classification Type Approval Certificate of Cruise Ship Equipment (크루즈선박 기자재의 선급형식승인에 관한 검토)

  • Kim, Ki-Pyoung;Kang, Ho-Keun;MA, Suk-In
    • Proceedings of the Korean Society of Marine Engineers Conference
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    • 2011.06a
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    • pp.250-253
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    • 2011
  • The cruise industry is one of the world's fastest growing device industry which is structural construction coasts are expensive. Cruise out-fittings are thirty times compare with general large vessels. According to the characteristics of materials or equipments, most equipments are imported from europe. At present domestic shipbuilding industries and minor enterprises have a hard times therefore enhancing technology for the cruise industry could be infused vitality on the industries. If domestic small and midium industries have high technology for the cruise ship, domestic small and midium industries can have global competitiveness compare with european equipment suppliers which has small-scale and high technology. Therefore on this study, cruise ship's new equipment development and a study for the performance assessment and classification type approval certificate was carried out.

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Design and Implementation of Integrated Marine Data Networking and Communication System for Training-Research Ship (실습조사선의 종합정보통신망시스템 구축)

  • KIM JAE-DONG;PARK SOO-HAN;KIM HYUNG-JIN;KOH SUNG-WI;JEONG HAE-JONG
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • 2004.05a
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    • pp.24-29
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    • 2004
  • A small, highly-trained crew working on the ship's automation has contributed to the improvement of operation efficiency and the labor environment on board ship. However, at the same time, having a small crew adds more responsibility to the ship's officers to safely operate and manage the ship. Recently, development on the system to concentrate important information being scattered at the various pieces of navigational equipment has been actively studied, using information and computer technology. The purpose of this study is to set up and implement an integrated marine data networking and communication system on the training-research ship. Information relating to navigation, engine and office automation were investigated and analyzed, and implementation methods associated with navigation, engine and the management information system were designed and presented. In addition, the networking system and navigational signal interface unit for the integrated communication system, and the data communication method between the ship and land are also discussed.

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A Study on Design and Implementation of Integrated Marine Data Networking and Communication System for Training-Research Ship (실습조사선의 종합정보통신망시스템 구축에 관한 연구)

  • KIM JAE-DONG;PARK SOO-HAN;KIM HYUNG-JIN;KOH SUNG-WI;JEONG HAE-JONG
    • Journal of Ocean Engineering and Technology
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    • v.18 no.6 s.61
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    • pp.44-50
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    • 2004
  • A small, highly-trained crew working on the ship's automation has contributed to the improvement of operations and the labor environment on board ship. However, at the same time, having a small crew adds more responsibility to the ship's officers to safely operate and manage the ship. With the use of information and computer technology, efforts are being made towards the development of a system that will concentrate important information from the various pieces of navigational equipment. The purpose of this study is to set up and implement an integrated marine data networking and communication system on the training-research ship. Information relating to navigation, engine and office automation are investigated and analyzed, and implementation methods associated with navigation, engine and management information system were designed and presented. In addition, the networking system of the navigational signal interface unit for the integrated communication system, and the data communication method between the ship and land are also discussed.

Comparative Study of Ice Breaking Performance according to Scale of Sea Ice on Ice Field (실해역 해빙 크기에 따른 Araon호의 쇄빙성능 비교연구)

  • Lee, Chun-Ju;Kim, Hyun Soo;Choi, Kyungsik
    • Journal of Ocean Engineering and Technology
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    • v.28 no.1
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    • pp.28-33
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    • 2014
  • The Korean icebreaking research vessel "Araon" performed four sea trials in the Arctic and Antarctic Seas. The ice properties, such as the ice thickness, floe size, ice strength, and power of the vessel were quite different in these trials. To compare the speeds of ship with the same ice strength and power, the AARC (Arker Arctic Research Center) method is used with a vessel power of 10 MW and an ice strength of 630 Pa in this paper. Based on the analysis results, the speed of the ship was 1.62 knots (0.83 m/s) with a 1.02-m ice thickness and 2.5-km floe size, 5.3 knots (2.73 m/s) with a 1.2-m ice thickness and 1.0-km floe size, and 13.8 knots (7.10 m/s) with a 1.1-m ice thickness and 200-m floe size. The analysis results showed that the ship speed and floe size have an inversely proportional relationship. Two reasonable reasons are given in this paper for the final result. One is an ice breaking phenomenon, and the other is the effect of the ice floe mass. For the breaking phenomenon, the ice breaking force is very small because the ice floe is not breaking but tearing when a ship is passing through a small ice floe. Regarding the effect of the ice floe mass, it is impossible for a ship to push and tear an ice floe if the mass of the ice floe is too large compared to the mass of the ship. The velocity of the ship decreases when the ice floe has a large mass and a large size because the ship has to break the ice floe to move forward.

A Study on the Dynamic Response Analysis of the Fishery Barge Type Offshore Structure for Fitting Radar Reflector (레이더 리프렉터 장착을 위한 어업용 바지선의 동적 응답해석에 관한 연구)

  • Park Sung-Hyeon;Jeong Jung-Sik
    • Journal of Navigation and Port Research
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    • v.29 no.5 s.101
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    • pp.383-388
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    • 2005
  • To install a radar reflector on small ships, such as a small fishing vessel, a fishery buoy, and a barge ship for fishery, it is very important to develop the optimal system which may determine a proper installation location. For this, the response characteristics how waves have an effect on the small ships should be accurately analyzed. In this paper, we analyze the dynamic behaviors of small ships, which may be caused by irregular waves. To do this, we investigate how a barge ship responses to wavelength, water depth, and directions of incoming waves. The analyzed results shall be utilized to evaluate an effect on a radar cross section when we install an radar reflector on a barge ship for fishery and a small ship.

The development of internet based ship design support system for small and medium sized shipyards

  • Shin, Sung-Chul;Lee, Soon-Sup;Kang, Dong-Hoon;Lee, Kyung-Ho
    • International Journal of Naval Architecture and Ocean Engineering
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    • v.4 no.1
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    • pp.33-43
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    • 2012
  • In this paper, a prototype of ship basic planning system is implemented for the small and medium sized shipyards based on the internet technology and concurrent engineering concept. The system is designed from the user requirements. Consequently, standardized development environment and tools are selected. These tools are used for the system development to define and evaluate core application technologies. The system will contribute to increasing competitiveness of small and medium sized shipyards in the 21st century industrial en-vironment.

2D numerical modeling of icebreaker advancing in ice-covered water

  • Sawamura, Junji
    • International Journal of Naval Architecture and Ocean Engineering
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    • v.10 no.3
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    • pp.385-392
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    • 2018
  • This paper presents 2D numerical modeling to calculate ship-ice interactions that occur when an icebreaker advances into ice-covered water. The numerical model calculates repeated icebreaking of an ice plate and removal of small ice floes. The icebreaking of the ice plate is calculated using a ship-ice contact detection technique and fluid-structural interaction of ice plate bending behavior. The ship-ice interactions in small ice floes are calculated using a physically based modeling with 3DOF rigid body equations. The ice plate is broken in crushing, bending, and splitting mode. The ice floes drift by wind or current and by the force induced by the ship-ice interaction. The time history of ice force and ice floe distribution when an icebreaker advances into the ice-covered water are obtained numerically. Numerical results demonstrate that the time history of ice force and distribution of ice floes (ice channel width) depend on the ice floe size, ship motion and ice drifting by wind or current. It is shown that the numerical model of ship maneuvering in realistic ice conditions is necessary to obtain precise information about the ship in ice-covered water. The proposed numerical model can be useful to provide data of a ship operating in ice-covered water.

Motion Behavior of Platform Supply Vessels Running Under Regular Wave Conditions in RANS Model

  • Park, Huiseung;Jang, Hoyun;Ahn, Namhyun;Yoon, Hyunsik
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.25 no.3
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    • pp.366-372
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    • 2019
  • This study performed a numerical analysis of a 3D unsteady viscous flow in order to investigate ship motion responses running through regular waves of the platform supply vessel. The feasibility of numerical analysis was tested under the three regular wave conditions of the KRISO container ship (KCS) suggested at the 2010 Gothenburg CFD Workshop. The resulting resistance coefficient, heave motion, and pitch angle were compared with the model test of the harmonic analysis. Also, the ship motion response characteristics of the platform supply vessel were performed using the proven method of the KRISO container ship (KCS). The ship motions including the resistance coefficient, heave motion, and pitch angle according to the time series were investigated via harmonic analysis under regular waves condition of ${\lambda}/LPP=1.87$ and $H_S=0.078m$.

Development of a Small Unmanned Marine Prober and Navigation (소형 무인해양탐사선 및 항법 개발)

  • 임종환;강철웅
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.3
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    • pp.59-65
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    • 2004
  • The paper presents a small unmanned probing ship that can be used for acquiring information on marine and coastal environments. For communication system, we adopt direct and indirect methods based on the wireless modem of a commercial cellular telephone. The former is a direct communication between the modems of the ship and the server, and the latter is an indirect communication via internet between the ship and the server. The system is equipped with a digital compass and a GPS for position estimation, and extended Kalman filter is used for Navigation. The performance of the ship is demonstrated with the results produced by sets of experiments.