A Cornerstone For Wind-Assisted Ship Propulsion (WASP) Systems

A recent survey by Vaisala in collaboration with the International Windship Association (IWSA) has shed light on the critical role of accurate wind data in optimizing Wind-Assisted Ship Propulsion (WASP) systems. The study highlights the industry’s evolving priorities and the technological advancements shaping the future of wind propulsion.

Key Insights from the Survey

Importance of Local Wind Measurements

• 75% of participants rated local wind measurements as “very important” for optimizing WASP performance—up significantly from 20% in 2022.
• Ultrasonic anemometers remain the primary tool for capturing reliable wind data.

Role of Wind Data in System Optimization

• 87% of respondents confirmed that local wind data directly improves WASP system efficiency.
• Half of the participants noted its importance in enhancing safety, ensuring activation only in optimal wind conditions.

Wind Nowcasting and Real-Time Monitoring

• Real-time wind nowcasting emerged as a priority for maximizing operational efficiency and system performance.
• Accurate wind measurements help in real-time adjustments, improving fuel efficiency and reducing emissions.

Challenges in Wind Data Acquisition

The survey identified several barriers to optimizing WASP systems through wind data:

1. Data Reliability: High-fidelity wind data is critical to minimize noise and interference.
2. Advanced Tools: Technologies like wind lidar are needed for undisturbed wind data collection.
3. Environmental Complexity: Comprehensive wind field analysis is essential to address variable conditions.
4. Sensor Placement: Strategic placement ensures accurate readings, avoiding disturbed airflow.
5. Cost-Effectiveness: Balancing affordability with regulatory compliance remains a challenge.

Weather Forecasts and Predictive Tools

• Over 80% of respondents integrate weather forecasts to optimize wind propulsion systems.
• Real-time wind observations are prioritized by 30% of participants for their immediacy and accuracy.
• The growing trend is toward integrating real-time and predictive data for holistic optimization.

WASP in Decarbonization

In 2024, the maritime industry made significant progress in using WASP systems as a decarbonization tool, retrofitting vessels with:

• Rotor sails
• Wing sails
• Kite systems

These innovations have demonstrated potential in enhancing fuel efficiency and reducing emissions.

Adoption Projections

• EU Estimate: 3,700–10,700 installations by 2030.
• UK Vision: 40–45% of the global fleet using wind propulsion by 2050.

Despite optimism, widespread adoption faces hurdles such as:

• Lack of standardized criteria for efficiency evaluation.
• Hidden costs and logistical challenges.
• Supply chain scale-up needs.

The survey underscores the maritime industry’s commitment to sustainability and highlights the critical role of accurate wind data in achieving the potential of WASP systems. As operators continue to innovate and invest in wind propulsion, addressing these challenges will be key to driving widespread adoption and meeting global decarbonization goals.