by Doğan Güneş and Ergin Kükrer
Mechanical Engineering Department, Istanbul Bilgi University, Eyüp, Istanbul 34060, Türkiye Submission received: 11 March 2024 / Revised: 1 April 2024 / Accepted: 6 April 2024 / Published: 8 April 2024
- Conclusions
The computational analysis conducted in this study offers valuable insights into the performance characteristics of a novel airborne vertical axis wind turbine (AVAWT) system across varying wind conditions. Our findings not only highlight the complex interactions between wind speed, rotational speed, and turbine performance but also provide several opportunities for researchers and developers in the field of airborne wind energy.
One significant implication of this research is the identification of optimal operating conditions for maximizing energy extraction efficiency. The cyclic behavior observed in power generation, characterized by peaks at specific rotor positions, underscores the importance of adjusting rotational speed to optimize power output. This presents an opportunity for further research into advanced control strategies and optimization algorithms aimed at dynamically adjusting rotor speed to adapt to changing wind conditions in real time, thereby enhancing overall system efficiency.
In this study, we carried out a comprehensive evaluation of the performance of a vertical axis wind turbine (VAWT) airborne wind turbine system inspired by the innovative design resembling yacht sails. By using information from related websites and literature, which reported a power coefficient (Cp) of 0.21, we aimed to validate and extend these initial claims. Through meticulous computational analysis, we investigated the performance of the turbine across a spectrum of wind speeds and rotational velocities. Our findings revealed a dynamic range of average power coefficients (Cp) spanning from 0.1 to 0.38, underscoring the versatility and adaptability of the turbine system under diverse operating conditions. Notably, the highest power generation potential was observed at a wind speed of 12 m/s and a rotational speed of 13.85 rpm, culminating in an impressive average power production of 91.18 kW.
Moreover, our analysis of wake formation and translation behind the rotor highlights the need for further research to minimize power losses due to wake interference. Wake and vortex structures could be further explored to mitigate the adverse effects of wake turbulence on downstream turbines. Additionally, experimental validation of the numerical results could further enhance the reliability and accuracy of the predictive models.
In conclusion, this study contributes to the ongoing efforts to harness the vast potential of airborne wind energy as a sustainable and renewable energy source. By addressing key research challenges and identifying opportunities for innovation, this research lays the foundation for the continued development and commercialization of different types of airborne wind turbine systems.
Would pumping mode (perhaps using hydrogen-filled envelope within nitrogen-filled envelope within air-filled envelope) or lifting (perhaps using hydrogen-filled envelope within nitrogen-filled envelope) versions be interesting?
See also the reference 22: