본 연구에서는 선박용 엔진을 활용하여 E2, E3 사이클 시험 결과로부터 연료 내 황 함유량 변화에 따른 대기오염물질 배출 특성을 조사하였다. 테스트를 위해 사용된 엔진은 360 PS의 엔진(Doosan L126TIH engine)을 활용하였고, 동력계로는 Horiba-Schenck사의 400㎾급 동력계인 W400을 사용하였다. 엔진에서 발생되는 대기오염물질 계측을 위해서는 오스트리아 AVL사의 FTIR과 SPC 장비를 배기라인 후단에 장착해서 사용하였다. 실험 결과로는 E2, E3 사이클 모두에서 연료 내 황 함유량이 증가할수록 THC와 CO의 단위 출력 당 배출량은 감소하고 입자상물질은 증가하였다. 연료의 황 함유량이 증가할수록 동점도가 증가되어 엔진의 연료소모율이 좋아지는 것을 확인하였다. 이는 본 연구에 사용된 엔진의 경우 연료 분사압력이 일정한 상태에서 동점도 증가에 따른 분무입자의 평균입경이 커짐에 따른 연소 상태가 개선되었기 때문이라 생각되어진다. 질소산화물의 경우 이번 연구에서는 황함유량의 변화에도 배출량에서는 큰 변화를 보이지 않았다.

Recently, the outboard engine system of internal combustion engine is widely used in the field of small ship propulsion. However, the internal combustion engine has serious problems of energy depletion and environmental problems, so electric propulsion methods are being studied. In this paper, we have developed important motors and controllers of electric propulsion system for small marine outboard motors. The motor design was performed through the motor characteristics analysis method, and the 30Kw system was developed through the BEMF processing circuit and the power conversion circuit by the embedded microprocessor. This study was carried out through government supported projects and achieved quantitative targets through accredited institutions.

Domestic fishing villages' net profit has consistently dropped down in recently, and currently it is down to 16.4%.This paper develop and increase fishing profit as this project will decrease 20% of the operation cost and eventually vitalize the fishing villages' economy. Especially, it could be an alternative solution to the constant requests of WTO (World Trade Organization) and UN ECOSOC (UN Economic and Social Council) to stop cross subsidization of marine products. IMO (International Maritime Organization) is concerned about air pollution caused by carbon dioxide production, and it strongly suggests on decreasing carbon dioxide discharge level. This paper will help protect ocean ecology as it will not only decrease various types of oil usage but also promote alternative technology solution. Also Increase business' profit by selling ocean and other related business parts and factors. Low speed electric car applies high performance level of motor and motor control devices. Among those, about 20% is the original cost of motor and motor control devices. Therefor entering low speed electric car market, parts sales and sales will increase.

Marine casualties of vessel are serious problems on social and national aspects, because it results in sacrifice of lives, a great lose of properties and marine pollution. According to recent statistics of marine casualties of vessel, fishing boats are more likely to be ended in the casualty, and especially, small fishing boats cause much more accidents than any other big vessels. Most of marine casualties were caused by the human factors such as poor watch keeping, inadequate manoeuvering and negligent action for engine, etc. This study is intended to provide navigator of small fishing boat with a specific information of necessary to assist both the manoeuvering and the avoidance of capsizing. The manoeuvering characteristics of ship can be adequately judged by the results of typical ship trials manoeuvres. For this purpose, the author measured the roll responses of a small fishing boat in waves using the real sea experimental measuring system, and analyzed the experimental data by the statistical and spectral analyzing methods to get the characteristics of the roll motion responses of the small boat through the wave directions and the ship's speed.

최근 들어 선박직원법상 승무기준의 개정의 필요성에 대한 강력한 주장이 수산업계에서 제기되었다. 수산업계에서는 승무기준완화 입장을 유지하는 반면 노동계와 해기사협회 및 통신사협회는 현행유지 내지 기준의 강화를 주장하였다. 본 연구는 선박안전운항을 확보하기 위하여 선박직원법상 소형선박조종사 승무기준의 타당성과 그 개선 방안을 연구 제시하고자 한다.