Bureau Veritas (BV) released new-generation classification rules for wind propulsion systems. These rules aim to help support the development of zero carbon propulsion options for modern ships.
The new Bureau Veritas rule notation for Wind Propuslion Systems (WPS) – NR 206, builds on pre-existing BV rules released in 1987. Now two new notations have been issued to provide the classification requirements for modern wind powered ships: WPS 1 for standing rigging and WPS 2 for standing and running rigging. Both provide load cases and coefficients for all types of wind propulsion technologies.
The new rules provide the key classification framework for wind assisted propulsion. Firstly at the design review stage, in order to ensure safety and interactions with other systems onboard, and, secondly, for in-service life, wherein the rules address survey regime and maintenance requirements.
General requirements that must be addressed include:
- Risk analysis / hazard identification (HAZID) studies
- Definition of load cases and critical situations
- Definition of automation and release system
- Definition of wind propulsion system impacts on ship safety
- Ship strength: influence on hull girder strength, addressing bending moments and shear forces
- Local strength in way of connections between wind propulsion systems and the ship including the mast footings, boom, deck, standing rigging attachments to the ship and manoeuvring systems
The rules also require an operational manual including limitations of operation of wind propulsion systems in accordance with its design, such as wind speed limitations.
Laurent Leblanc, Senior Vice President Technical & Operations at Bureau Veritas, stated:
We know that the power of the wind, even if it is not always available, can make a significant contribution to GHG-free ship propulsion and ship design. Wind propulsion systems can play a significant auxiliary role in providing substantial propulsive energy and, in some cases, wind could be used for main propulsion requirements. This is an incredibly exciting time for the industry as we revive an ancient, powerful and endlessly renewable source of energy – but with all the benefits of modern technology and materials
Remaining in the field of wind propulsion, last month the International Windship Association launched a new initiative to accelerate shipping decarbonisation.
The new campaign called the ‘Decade of Wind Propulsion’, aims to accelerate the adoption of hybrid alternative propulsion methods, blending wind, alternative fuels and energy efficiency measures.
What is more, after extensive testing conducted at the Wolfson Unit of the University of Southampton, it has been confirmed that an appropriately rigged commercial vessel could achieve savings of fuel and reduce emissions by at least 30% per year.
The Wolfson Unit report analyzed performance predictions regarding thrust reductions or effective power reductions for a 125,000dwt vessel with two different combinations of rig devices. Namely, the team found that the rigs are essential to the effectiveness of Windship Technology’s True Zero Emission design.
