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Integrated horizontal-axis and vertical-axis wind turbines

[Category : - RENEWABLE ENERGY]
[Viewed 786 times]

A major difficulty encountered by a horizontal axis wind turbine (HAWT) is the limit of aerodynamic torque that it can withstand at high wind speeds. This novel design improves the operational capability of a prototype scale system by increasing the HAWT's rated wind speed for power generation. This is achieved by integrating its drivetrain with that of a vertical axis wind turbine supported on a common tower. Excess torque is transferred from the horizontal axis rotor to the vertical axis rotor’s drivetrain by coupling them using a continuously variable transmission.rnPerformance of this hybrid system is predicted at potential wind sites and is shown to exceed the standalone mechanical power output of both subsystems under different wind regimes. The critical criterion of the system’s aerodynamic feasibility was also investigated by turbulence modelling and it was found to be stable. For example, both a 30 kW HAWT and a 12 kW VAWT can be integrated on the same tower.rnThe details are given in the following article:rnB. Govind “Increasing the operational capability of a horizontal axis wind turbine by its integrationrnwith a vertical axis wind turbine” Applied Energy 199, pp. 479-494. DOI:rn10.1016/j.apenergy.2017.04.070.rn

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Patent publications:

US 9816487

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40,000 USD

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salov123 (United States)

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