• 한국항해항만학회지
• /
• 제39권6호
• /
• pp.439-450
• /
• 2015

본 연구는 아시아 케미컬 탱커 시장을 구성하는 수요 및 공급적 특성을 알아보고 케미컬 탱커선의 주요 비용을 파악하여 탱커시장의 주요 노선별로 최적선형을 제시하는 것이다. 따라서 본 연구는 선박 운항 상 비용분석에 관한 선행연구사례를 파악하고 케미컬 탱커 관련 연구를 통해 케미컬 탱커선에 적용 가능한 비용모델을 파악하였다. 또한 각 비용요소에 해당하는 데이터를 수치해석(Numerical Analysis)하고 연구결과의 민감도를 최소화하기 위해 시나리오 분석을 시행하였다. 그 결과 다음과 같이 다섯 가지의 시사점을 도출할 수 있다. 첫째, 연구대상 선형에서 평균적인 마켓상황을 가정했을 때, '극동-중동 노선'에서는 12,000DWT급 선형, '극동-동남아시아 노선'에서는 9,000DWT급 선형, 극동지역 내 에서는 3,000DWT급이 비용측면에서 경쟁력을 보일 수 있다. 둘째, 케미컬 탱커의 선박 사이즈가 커질수록, 연료의 가격이 상승함에 따른 경쟁우위가 높아지고 작은 사이즈의 경우 연료가격이 하락할 경우 경쟁우위가 높아지는 것으로 나타났다. 셋째, 케미컬 탱커의 용선료 변동은 호황기와 불황기의 표준편차가 20%미만으로 시황의 영향을 덜 받는 것으로 나타났으며, 비슷한 비율로 상승 시 사이즈별 경쟁력에는 큰 차이가 없는 것으로 나타났다. 넷째, 케미컬 탱커의 Parcelling의 규모가 커질수록 큰 사이즈의 케미컬 탱커가 경쟁력을 가지며 반대의 경우 작은 탱커의 경쟁력이 상승하는 것으로 나타났다. 마지막으로, 케미컬 탱커의 재항시간은 선박의 비용측면에 큰 영향을 미치는데 재항시간이 감소할 경우 큰 사이즈의 선박 경쟁력이 더욱 상승하여 보다 짧은 루트에 투입하여도 경쟁력이 있는 것으로 나타났다.

• 대한용접접합학회:학술대회논문집
• /
• 대한용접접합학회 1999년도 특별강연 및 추계학술발표대회 개요집
• /
• pp.290-293
• /
• 1999

• 대한조선학회 특별논문집
• /
• 대한조선학회 2013년도 특별논문집
• /
• pp.1-7
• /
• 2013

In past decades, a maximum standard vessel size for chemical tankers is not normally larger than 55,000 TDW due to the characteristic of chemical product shipment which is so variable but small quantity unlike single product carries such as crude oil tankers. These days, as demand of very large chemical tanker is rising due to the change of market trend of chemical product shipment, 75,000 TDW class chemical tanker has been developed. The newly developed vessel's structure has been designed based on CSR (Common Structural Rule) for double hull oil tankers (hereafter CSR) published by IACS (International Association of Classification Societies). However, due to the large difference from typical oil tankers, many items should be specially considered such as on deck transverse and corrugated bulkheads. In addition, two longitudinal bulkheads without upper stool have been constructed in order to maximise the number of cargo tanks and the volume of each cargo tanks. In this study, key word of the vessel has been briefly reviewed and the structural reliability of the proposed vessel has been investigated.

• 한국해양공학회지
• /
• 제24권2호
• /
• pp.41-46
• /
• 2010

This paper deals with the problem of developing a new decision procedure for the freeboard of a coastal chemical tanker going on the coast. The decision procedure is mainly constructed with the algorithm of estimating statistically the time period that deck wetness will last on the deck of the ship. Deck wetness is one of the most important safety factors for sailing of a coaster. It generally means the situation in which the amplitude of the relative motion between the deck and the surface of the wave exceeds the freeboard. Therefore, in this paper, we proposed that the time during which the amplitude remains above the level of the freeboard should be appraised on the basis of statistical theory. A series of numerical calculations were executed for four different coastal chemical tankers (199G/T Type II, III & 499G/T Type II, III). It was demonstrated that the present decision procedure of freeboard is practical for planning the type of coaster sailing in the sea.

• 대한조선학회논문집
• /
• 제59권2호
• /
• pp.89-95
• /
• 2022

The stability of the existing ships has been evaluated through numerical calculations in the steady-state, but recently the IMO proposed a new stability assessment criteria that the stability is evaluated in the state in which environmental loads from such as waves and wind act like the loads under actual ship operating conditions. In this study, IMO 2nd generation stability assessment method and procedure were summarized for the dead ship condition, and Direct Stability Assessment (DSA) was performed on 13K chemical tanker through basin model test. The model test is performed in the ocean engineering basin to implement wave and wind loads, and environmental conditions for waves were set height and period of the incident wave, considering the regular wave and wind generation range reproducible in the ocean engineering basin. In addition, to consider the effect of wind speed, the Beaufort Scale for wind speed was applied in the model test.

• 대한조선학회지
• /
• 제13권1호
• /
• pp.35-39
• /
• 1976

• 대한조선학회지
• /
• 제55권3호
• /
• pp.41-50
• /
• 2018

• 무역상무연구
• /
• 제41권
• /
• pp.185-202
• /
• 2009

With the rapid development of oil and chemical industry in the late 20C, massive transportation of oil by oil tanker vessel has grown and it caused the big oil pollution accidents. When oil spill from the oil tanker, damages reach into the astronomical figures in economically and damages affect wide area and many people with break the balance of ecosystem. Recently in Korea, the oil pollution accidents has occurred frequently as growing of oil consumption and it caused large-scale damages to the victim. Oil pollution in Korea offshore takes not only Korean fisherman from their life ground and break the ecosystem but it takes too much time and money to recover. To minimize oil pollution damages, it is necessary to make pre-caution effort as a ship owner and relevant government bodies should endeavor to prevent from more damages. But once oil pollution accidents occurs in territorial sea, compensation for victim is very important. But it is true that compensation is not paid to victim smoothly. So this study aims at the problems of oil pollution compensation to the Korean victim and find the best way to get reasonable compensation.

• 한국항해항만학회:학술대회논문집
• /
• 한국항해항만학회 2002년도 춘계학술대회논문집
• /
• pp.145-153
• /
• 2002

A coastwise chemical tanker sailing at full speed has capsized in calm water and whole turing. In the precious paper, we investigated reasons of the accident by demonstrating the proper correction for the free surface effect of the liquid cargo and the bow-sinkage effect. In this paper, we also carry out model experiments of a transverse pressure under the seawater and an outward heel moment according to the heel angle and rudder angle, on the basis of radius of turning circle, ship's speed and drift angle of model ship occurring in turning. It is also shown that the flooding of seawater onto the deck occurring in turning generated a significant outward heel moment and the vertical distance between the center of gravity of the ship and the renter of lateral water drag.

• 수산해양기술연구
• /
• 제51권2호
• /
• pp.257-264
• /
• 2015

This study is intended to provide navigator with specific information necessary to assist the avoidance of collision and the operation of ships to evaluate the maneuverability of dead weight tonnage 8,000 tons Oil/Chemical tanker. The actual maneuvering characteristics of ship can be adequately judged from the results of typical ship trials. Author carried out sea trials based full scale for turning test, Z" maneuvering test, man overboard rescue maneuver test, inertia stopping test. Consequently, $2^{st}$ Overshoot yaw angle of the semi balanced rudder and flap rudder in ${\pm}20^{\circ}$ zig-zag test showed $22.2^{\circ}$ and $18.0^{\circ}$, respectively. The maneuverability of the vessel was good in the flap rudder. The man overboard rescue maneuver maneuverability test was most favorable in the flap rudder and the full load condition. The results from tests could be compared directly with the standards of maneuverability of IMO and consequently the maneuvering qualities of the ship is full satisfied with its.