태양광 추진 소형 레저보트 선형개발에 관한 연구

Abstract

ABSTRACT

A Study on the Hull Form Development of Solar Powered Small Leisure Boat

Park, Kyeong-hun Advisor : Prof. Park, je-woong Ph. D. Department of Naval Architecture & Ocean Engineering Graduate School of Chosun University

As the public interest in marine leisure is increasing recently, the development of technology related to leisure boat and completions is also continuously increasing. However, most of those boats use engines of fossil fuel, it often causes not only water pollution in the coast but also secondary damage due to noise.

Therefore, reduction of greenhouse gas and development of leisure boat in a new concept using new regeneration energy are needed for activating marine leisure.

Considering domestic and overseas environment, this research developed a basic model of a small leisure boat for two people that propels by using only solar photovoltaic energy. To maximize light-harvesting effect of solar photovoltaic energy and secure stability of sailing, the concept of catamaran was introduced. The developed model of the ship approved its performance through model test in computational fluid dynamics (CFD) and circulating water channel. This research draw conclusion as it follows.

1) When design speed is higher than Froude value 0.3, it was confirmed that waver interference between two bulls can be reduced by designing the body of water plane as a straight line.

2) Like this development ship, to design to make operation in a long term with one charging for electrically propelling boat, it is confirmed that it is better to make bow area think and distribute lots of displacement to stern area in order to reduce wave- making resistance. And it is also confirmed that putting the battery on stern for good propelling performance.

3) In case of a small leisure boat for two people that propels by only using solar photovoltaic energy, having twin hull boat can improve performance in order to secure stability of sailing and to maximize light-harvesting effect.

4) In case of catamaran like this develop boat, L/B, which is a rate of length-width, is efficient when it is about 2.1 in average.

5) This develop boat confirmed the speed of more than 5 note as maximum by using 2Kw motor.

6) Flow analysis using common CFD code FLUENT shows similar tendencies with model test results, so it can be useful in development phase of the early model of catamaran.