A new ducted turbine surpasses Betz’s limit and opens a new era in wind energy

August 16, 2025
A new ducted turbine surpasses Betz's limit and opens a new era in wind energy

The Betz limit is a concept used in the wind energy industry, establishing the maximum theoretical efficiency with which a wind turbine can convert the wind’s kinetic energy into electrical energy. That said, recent scientific research and experiments have shown that new turbines are capable of producing far more than any of their previous designs.

This limit is due to the need to maintain wind flow through the wind turbine

According to the Betz limit principle, formulated by German physicist Albert Betz in 1919, no more than 59.3% of the wind’s kinetic energy can be captured. This limit is due to the need to maintain wind flow through the wind turbine. It turns out that the ducted turbine is now turbulent away from the outside air and is supported by a casing covered with aerodynamic winding sheets. Laboratory work has demonstrated the difference and the advantage that ducted turbines have over the older version.

Power extraction reached a maximum coefficient of 0.61

In fact, the calculated speed ranges between 8 and 25 m/s, maintaining the necessary conditions in a rigorously monitored wind tunnel. Power extraction reached a maximum coefficient of 0.61, slightly different from the Betz limit of approximately 0.593.

The importance of the Betz limit lies in its ability to guide the design and optimization of wind turbines

The inference resulting from this important innovation is so immense that we cannot even begin to fathom how far we could go beyond the Betz limit. The importance of the Betz limit lies in its ability to guide the design and optimization of wind turbines. It should be noted that this in no way contradicts the fundamental principles of mechanics in physics, but simply serves as a major leap forward in exploiting recovered energy that could have been wasted.

Although the practical efficiency of these devices generally ranges between 40% and 50%, understanding the theoretical ceiling allows engineers and designers to get as close as possible to this ideal limit. This means, as we mentioned before, this understanding fosters innovation in blade design, material selection, and wind system configuration to maximize energy capture.

If the Betz limit remains the “previous limit,” the idea of an off-world application is viable

Our lunar space plays an important role in this application because lunar gusts surrounding crater rims can be captured by steered rotors. This includes the high-energy wind motion occasionally captured on Mars. Engineers invest ideas like this in finding solutions for expansion while avoiding invasion. A feat that could be enormously beneficial if fully utilized and exploited. Consequently, if the Betz limit remains the “previous limit,” the idea of an off-world application is viable.

As wind technologies evolve, wind energy is positioned as an increasingly vital and competitive source within the global energy mix. Continued efforts in research, development, and innovation will be crucial to maximize the potential of this clean, renewable energy source. After several attempts, it can be firmly concluded that the driven turbine is one of the most efficient means of generating renewable energy, as is this groundbreaking discovery.

The reality is that technology is advancing at such a rapid pace that combining the concepts of “wind energy” and “Mars” in the same sentence seems almost like a vision of the future. But the fact is that it’s a reality. Investment in innovation is reflected in this type of experimentation and research. It’s essential to keep in mind that the more young people have access to higher education, the better educated a country will be and, therefore, the greater the chances of continuing to advance. The ultimate goal is to try to improve human life on Earth. We continue working on that goal.