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| Betz Limit× | 最大電力点追従× | |
|---|---|---|
| 分野 | 熱力学 | 熱力学 |
| 系統 | Process / pipeline | Process / pipeline |
| 提唱年≠ | 1920 | 2007 |
| 提唱者≠ | Albert Betz | Trishan Esram |
| 種類≠ | Theoretical limit | Control algorithm |
| 原典≠ | Betz, A. (1920). Das Maximum der theoretisch möglichen Ausnützung des Windes durch Windmotoren. Zeitschrift für das gesamte Turbinenwesen, 26, 307-320. link ↗ | Villalva, M. G., Gazoli, J. R., & Ruppert Filho, E. (2009). Comprehensive approach to modeling and simulation of photovoltaic arrays. IEEE Transactions on Power Electronics, 24(5), 1198-1208. DOI ↗ |
| 別名 | Lanchester-Betz limit, wind turbine efficiency limit | MPPT, impedance matching |
| 関連 | 3 | 3 |
| 概要≠ | The Betz Limit states that no wind turbine can extract more than 59.3% of the kinetic energy from flowing wind, regardless of design. This fundamental thermodynamic limit arises because extracting energy slows the wind, which then blocks further energy extraction. Albert Betz derived this limit in 1920 from momentum and energy conservation. Modern wind turbines achieve 35-45% efficiency, approaching this theoretical maximum. | Maximum Power Point Tracking (MPPT) is a control algorithm for photovoltaic and wind energy systems that continuously adjusts the electrical load to extract maximum power regardless of changing irradiance and temperature. Without MPPT, a solar panel or wind turbine operates below its power potential due to impedance mismatch with the load. MPPT boosts the annual energy yield by 15-25% depending on system and climate. |
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