In the maritime industry, achieving optimal efficiency is crucial for reducing fuel consumption and lowering operational costs. At Berg Propulsion, we are at the forefront of innovation, offering advanced solutions to meet the evolving needs of marine propulsion. Today, we’re excited to dive into our latest advancements in propulsion optimization.

The Basics of Propeller Technology

Let’s start with a quick overview of propeller types. A fixed pitch propeller (FPP) travels a set distance forward for each revolution, with thrust control depending on the engine and propeller RPM. While simple, this approach limits flexibility in adjusting to varying sea conditions.

A controllable pitch propeller (CPP) offers a significant advantage. By adjusting the blade pitch angle, we can control how far the propeller travels per revolution. This adjustability allows for more precise control over propulsion, optimizing both engine and propeller efficiency. To maximize this potential, we design a Combinator Curve, which defines the relationship between propeller pitch and RPM for the most efficient operation.

However, crafting the perfect Combinator Curve requires taking into account several real-world challenges, such as:

• Maximum engine load at varying RPMs
• Power demands from shaft alternators
• Adverse conditions like heavy winds, waves, and currents
• Vessel draft
• Hull fouling from marine growth

These factors make it difficult to design a fuel-efficient combinator curve that includes enough margin to meet the worst-case conditions.

Dynamic Drive: Adapting for Optimal Efficiency

To address these challenges, we developed Dynamic Drive—an adaptive system that continuously monitors the engine's load margin and adjusts the propeller pitch and RPM for optimal efficiency. Dynamic Drive simplifies the operation for crews by allowing them to set parameters for maintaining constant thrust, vessel speed, or fuel consumption. This adaptability ensures the vessel runs efficiently in any condition, automatically optimizing performance.

Enter OpWind®: Tailored for Sail-Assisted Vessels

Building on the success of Dynamic Drive, we introduced OpWind®, specifically designed for sail-assisted vessels. With the growing adoption of wind propulsion, the combination of sails and propellers presents a unique opportunity to further reduce fuel consumption.

OpWind® takes this synergy to the next level by automatically sensing the sail contribution and adjusting the propeller’s pitch and RPM to maximize efficiency. This intelligent system continuously analyzes the vessel’s operational data and adapts in real-time to ensure optimal performance. Whether the goal is constant thrust, speed, or fuel consumption, OpWind® provides a seamless and efficient solution.

Key Benefits of OpWind®

1. Automatic Optimization: OpWind® integrates propulsion data with real-time sail performance to automatically adjust settings for the best efficiency.
2. Flexible Operation Modes: Crews can select from various modes to maintain maximum speed, set fuel consumption limits, or ensure consistent thrust.
3. Fuel Savings: By leveraging wind propulsion, OpWind® significantly reduces fuel usage, making it a cost-effective choice for both new builds and retrofits.
4. Onboard Power Generation: In sailing mode, the system can use the propeller for onboard power generation, adding an extra layer of efficiency.
5. Enhanced Monitoring: Our Marine Information Display provides crews with a visual representation of performance, aiding in decision-making and operational adjustments.

Real-World Application and Impact

We are thrilled to see OpWind® gaining traction in the maritime industry, with initial orders from major vessel operators. These early adopters recognize the substantial fuel savings and operational efficiencies that OpWind® delivers. Whether navigating calm seas or rough waters, OpWind® ensures vessels can harness the power of wind and traditional propulsion in harmony.

Conclusion

At Berg Propulsion, our commitment is to drive innovation in marine propulsion, with a focus on reliability and sustainability. Dynamic Drive and OpWind® represent a significant leap forward in propulsion technology, offering enhanced efficiency and adaptability. By combining cutting-edge software with practical, real-world applications, we are helping the maritime industry move towards a greener, more efficient future.

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	Issue 95 of Robban Assafina (Jan/ Feb 2025)