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Cover: 9783846537978 | Vertical axis wind turbines | Brian Kirke | Taschenbuch | Paperback
Dekorationsartikel gehören nicht zum Leistungsumfang.
Vertical axis wind turbines
With particular emphasis on self-acting variable pitch Darrieus type turbines
Taschenbuch von Brian Kirke
Sprache: Englisch

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Beschreibung
Vertical axis wind turbines or VAWTs have some advantages compared to the better known horizontal axis turbines or HAWTs. VAWTs based on the Darrieus rotor principle are more efficient and economical than the Savonius type, but fixed pitch Darrieus VAWTs lack starting torque. This can be overcome with variable pitch blades, but active pitch control is complex and impracticable for stand-alone, non-electrical applications. Passive or self-acting variable pitch allows blades to pitch under the combined action of aerodynamic and inertial forces such that that a favourable blade angle of attack is maintained without the complexity of conventional variable pitch systems. This work assesses the potential of both fixed pitch and passive variable pitch vertical axis wind turbines to provide economical stand-alone power for direct mechanical drive applications. It is shown that the starting torque and low speed torque problems of VAWTs can be overcome either by passive variable pitch or by a combination of suitable blade aerofoil sections, either rigid or flexible, and transmissions which unload the rotor at low speeds so that high starting torque is not necessary.
Vertical axis wind turbines or VAWTs have some advantages compared to the better known horizontal axis turbines or HAWTs. VAWTs based on the Darrieus rotor principle are more efficient and economical than the Savonius type, but fixed pitch Darrieus VAWTs lack starting torque. This can be overcome with variable pitch blades, but active pitch control is complex and impracticable for stand-alone, non-electrical applications. Passive or self-acting variable pitch allows blades to pitch under the combined action of aerodynamic and inertial forces such that that a favourable blade angle of attack is maintained without the complexity of conventional variable pitch systems. This work assesses the potential of both fixed pitch and passive variable pitch vertical axis wind turbines to provide economical stand-alone power for direct mechanical drive applications. It is shown that the starting torque and low speed torque problems of VAWTs can be overcome either by passive variable pitch or by a combination of suitable blade aerofoil sections, either rigid or flexible, and transmissions which unload the rotor at low speeds so that high starting torque is not necessary.
Über den Autor
Brian Kirke has worked as an engineer, a teacher, a teacher-linguist, an academic and a consultant on vertical axis wind turbine design. His work on vertical axis wind turbines began in the early 1980s, leading to several prototypes, a patent, several journal articles and a PhD. He is also working on hydrokinetic turbine design.
Details
Erscheinungsjahr: 2011
Fachbereich: Kraftwerktechnik
Genre: Mathematik, Medizin, Naturwissenschaften, Technik
Rubrik: Naturwissenschaften & Technik
Medium: Taschenbuch
Inhalt: 364 S.
ISBN-13: 9783846537978
ISBN-10: 3846537977
Sprache: Englisch
Ausstattung / Beilage: Paperback
Einband: Kartoniert / Broschiert
Autor: Kirke, Brian
Hersteller: LAP LAMBERT Academic Publishing
Verantwortliche Person für die EU: LAP Lambert Academic Publishing, Brivibas Gatve 197, ?-1039 Riga, customerservice@vdm-vsg.de
Maße: 220 x 150 x 22 mm
Von/Mit: Brian Kirke
Erscheinungsdatum: 14.11.2011
Gewicht: 0,56 kg
Artikel-ID: 106724604
Über den Autor
Brian Kirke has worked as an engineer, a teacher, a teacher-linguist, an academic and a consultant on vertical axis wind turbine design. His work on vertical axis wind turbines began in the early 1980s, leading to several prototypes, a patent, several journal articles and a PhD. He is also working on hydrokinetic turbine design.
Details
Erscheinungsjahr: 2011
Fachbereich: Kraftwerktechnik
Genre: Mathematik, Medizin, Naturwissenschaften, Technik
Rubrik: Naturwissenschaften & Technik
Medium: Taschenbuch
Inhalt: 364 S.
ISBN-13: 9783846537978
ISBN-10: 3846537977
Sprache: Englisch
Ausstattung / Beilage: Paperback
Einband: Kartoniert / Broschiert
Autor: Kirke, Brian
Hersteller: LAP LAMBERT Academic Publishing
Verantwortliche Person für die EU: LAP Lambert Academic Publishing, Brivibas Gatve 197, ?-1039 Riga, customerservice@vdm-vsg.de
Maße: 220 x 150 x 22 mm
Von/Mit: Brian Kirke
Erscheinungsdatum: 14.11.2011
Gewicht: 0,56 kg
Artikel-ID: 106724604
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