• Title, Summary, Keyword: 오일펜스

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An Experimental Study on Development of the Opening Apparatus for Oil Boom (오일펜스 전개장치 개발에 관한 실험적 연구)

  • Jang Duck-Jong;Na Sun-Chol
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.9 no.1
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    • pp.45-54
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    • 2006
  • The study was to review methods by which a ship can unfold and tow an oil boom by attaching the opening apparatus to an oil boom through experiments. The shape and dimension of the opening apparatus were designed with the measurement value of the towing tension load of the oil boom and the dimension of winch drum of the oil boom installed in the ship considered. For the field experiment to identify the performance of the opening apparatus, opening apparatuses were prepared to have the dimension of $3.0m^2$ and $6.0m^2$ which is 91% and 75% of the calculation value for type B and C respectively. As a result, T(kg), the value of tension in type B oil boom according to the towing speed(v) change when two ships are towed together were proved to be $T=920v^{1.1}\;and\;T=500v^{0.9}$ in case the distance is 100 m and 50 m. Based on the result, the dimension of the opening apparatus for type B and C oil boom was calculated as $3.3m^2$ and $8.0m^2$ respectively. When unfolding and towing by attaching the opening apparatus and 200 m of towing line at both ends of type B and type C oil boom, the maximum width of the opening apparatus was shown as 114 m and 95 m in average(width of opening/total length of oil boom: 33% and 57%) in the towing speed of 1.5 kt. It was evaluated that the opening apparatus could concentrate the spilled oil in a good performance. However as far as the increase rate of oil boom opening width according to the length of the towing line is debatable, the increase rate is remarkably reduced when it is lengthened from 100 m to 150 m and to 200 m although it showed extreme increase of 31% and 40% when the length of the towing line was changed from 50 m to 100 m. Therefore, it is inferred that the towing line should be maintained more or less 100 m to get good spread efficiency of the opening apparatus. Additionally, if the towing speed is faster than 1.5 kt, the opening width was narrowed because of the reduced spread efficiency and the shape of the oil boom can be unstable because of the partial sinking of the oil boom, run over waves, or flap of skirt. Thus the reasonable towing speed can be within 1.5 kt for the operation of the opening apparatus.

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A Study on Mass Rescue Operation Utilizing an Oil Boom (오일펜스를 활용한 다수 인명의 구조에 관한 연구)

  • Jeong, Bong Hun;Choi, Hyun Kue;Park, Gap Jun;Ha, Seung Young
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.24 no.6
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    • pp.686-693
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    • 2018
  • After the Sewol ferry-sinking incident in 2014, the public interest in safety at sea increased. In order to save and secure the initial response time required for sea rescues, not only the rescue organization, but also the victim needs to save and maintain golden time to secure the necessary time for rescue personnel. The purpose of this study was to investigate ways to maintain the psychological stability of victims during their rescue in the case of a mass rescue operation by using the oil boom installed on board oil spill response vessels. Through buoyancy tests and the development of oil booms in sea areas, it confirmed the buoyancy of two adults weighing 70 kg each per meter of oil boom could be maintained when a lifeline was installed on the side of the oil boom, and that it was possible to keep afloat four persons weighing 70 kg each on both sides of the oil boom. It also confirmed the buoyancy for three adults weighting 70 kg each per eight meters was maintained when riding on the top of the oil boom. As a method of rescue, it was found that the fastest and most accurate way to rescue victims was a rescue boat held at the rear end of the oil boom to lead to victims. In conclusion, the rescue team could utilize the oil boom installed on board the oil spill response vessel located near the marine accident site to save and secure the initial response time required for the rescue team to arrive. The victims in distress holding onto the lifeline or riding on the top of oil boom kept afloat at sea could maintain their psychological stability until the mass rescue operation initiated.

Characteristics of Flow Field at Curved Section of Oil Fence using PIV Measurements and CFD Simulations (PIV 계측과 CFD 해석을 통한 오일펜스 만곡부 단면에서의 유동장 특성)

  • Kim, Tae-Ho;Jang, Duck-Jong;Na, Sun-Chol;Bae, Jae-Hyun;Kim, Dae-An
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.17 no.1
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    • pp.29-37
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    • 2011
  • PIV measurements of the velocity field, pressure field, vorticity, and turbulent intensity in the rear of curved section of an oil fence with current speed showed that the flow directions in the rear of flow boundary area were similar to those in the front of it. As the current speed increased, the patterns of pressure distribution were changed, and the turbulent flow became more irregular. CFD simulations under the same conditions as the PIV tests showed that the flow patterns of the wake were similar to those by PIV tests in speed of 0.3 m/s and less, but were distinctively deviated from those in 0.4 m/s due to the flexibility of the oil fence, which was not properly taken care of in CFD modeling.

Prediction of Deformation of an Oil-fence by using Fluid$\cdot$Structure Interaction Method (유체$\cdot$구조물 상호 작용 기법을 이용한 오일 펜스의 변형 예측)

  • Kim T. G.;Kim W.;Hur N.
    • Journal of computational fluids engineering
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    • v.5 no.3
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    • pp.16-22
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    • 2000
  • In the present study a method of computing fluid-structure interaction is presented to simulate the deformation shape of an oil fence which is used to contain or to divert the split oil in sea water. The computation is performed by taking into account of the force and moment balance in each computational element of the oil fence. The forces and moments acting on each element of the structure is computed from the flow analysis, which in turn is used to predict deformed shape of the structure until the procedure converges. The flexibility of the oil fence was also considered in the analysis. It is shown from the present study that the predicted deformed shapes agree quite well with the available experiment data.

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A Note on in-Situ Burning of Marine Oil Spills (해상누유 현장소각 기술에 대한 소고)

  • Sung H.G.
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.3 no.3
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    • pp.58-65
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    • 2000
  • Responses to marine oil spills can be classified Into categories; 1) mechanical treatment using booms and skimmers, 2) chemical one utilizing dispersants, 3) controlled in-situ burning of spilled oils. In the present paper, characteristics, history, present issues, advantages and disadvanteges, and future applicability of in-situ burning technology which is nowadays winning much attention are summarized on the basis of a survey of related papers and other resources.

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Study on Prediction for Prompt Countermeasures to Oil Spread in Ocean (해안기름유출사고에 의한 기름확산 예측 방법 연구)

  • Kim, Young-Bok
    • Journal of Ocean Engineering and Technology
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    • v.25 no.2
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    • pp.108-112
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    • 2011
  • When oil spills occur in the ocean because of a ship collision or grounding, the oil in the sea will spread to the coastline. To effectively and promptly prevent such an oil spread, the prediction of the direction and speed of the spreading oil must be made. By applying the coastal wave diffusion theory with a consideration of the effects of wind and current, the oil spreading direction and speed can be predicted promptly so that the National Disaster Prevention System can effectively and promptly take countermeasures against the attack and contamination of the coastline by such oil bands.

A Basic Study On the Estimative Direction of Responsible Ability for HNS National Contingency Plan Using Powersim (파워심을 이용한 HNS 국가방제기본계획의 방제능력 산정방향에 관한 기초 연구)

  • Lee Sang-Bae;No Chang-Gyun
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • pp.209-214
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    • 2006
  • This paper desires to assist ensuring of propriety clean-up equipment for clean-up shore or sea of pollution, there is not that responsible ability of a nation has an amount of skimmer or the length of boom. responsible ability of a nation must express overall evaluation what is considering quickly, system, and economizing in addition to an amount or clean-up equipment. responsible ability of a nation is complication and it's mutual relation of each other factor therefore responsible capacity of a nation is expressed using powersim with system dynamics theory.

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