Developing a comprehensive programme for improving shipboard energy efficiency

This article identifies a set of fuel saving strategies designed to meet the needs of vessel owners and operators, and describes how the strategies can be combined into a comprehensive programme. The strategies are developed from over sixty potential fuel saving measures grouped on the basis of commonness of purpose and interdependency. These criteria reflect the finding that implementing certain strategies is a prerequisite to the success of other strategies, and the success of some strategies generates a need to implement other strategies. Operational strategies identified include: developing crew motivation for active participation in energy efficiency improvement programmes; altering ship speeds; reducing auxiliary load on main propulsion plant; improved matching of ship capacities and cargo volume; reducing miles traveled; and maximizing use of electronic navigation and communications aids. Physical plant modification strategies identified include: optimizing for reduced ship speeds; fuel switching, blending and modifying; hydrodynamic improvements to the hull and propeller; and improving thrust.     

信息技术在海事行业的发展趋势

2009年5月10日-12日,第八届"计算机和信息技术在海事行业中的应用(COMPIT)"国际会议在匈牙利首都布达佩斯举行.自2000年举办首届会议以来,COMPIT已成为海事行业信息技术领域的重要会议,汇聚了众多软件开发商和用户.会议内容涵盖了船舶的生命周期,以及海上设施与设备,从设计到营运.     

Fully three-dimensional ship seakeeping computations with a surge-corrected Rankine panel method

A 3-d seakeeping code uses first-order Rankine panels with special numerical integration on the ship's hull and Rankine point source clusters above the free surface. The code computes the motions of the ship in regular waves of small height (linearized). The steady flow is captured without simplification by solving the fully nonlinear wave-resistance problem first. A special treatment of the surge motion considers the influence of periodic quantities on thrust and resistance, and improves surge motion predictions. Radiation and open-boundary conditions are enforced by staggered grids. Results for the ITTC standard test case S-175 containership agree well with experiments except for very long waves. The importance of capturing the three-dimensional steady flow contributions is also demonstrated.     

增加货车轴重

为了提高国际货物运输的效率，在订购新车时，选择比现行UIC标准规定的22．5t大的轴重，变得更经济、更具吸引力。文中概括了欧洲货车技术的现状，介绍了一种新型四轮货车走行部分，并展望了通过采用大轴重解决增加货物运输国际化道路上难题的前景。