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Model 636G
WHI’s Model 636G brings together the design of the Model 530G with the external array structure of the Model 1500. It will use 12-foot blades instead of the 10-foot blades of the Model 530G and thus increase its rotor swept area to 636 square feet. With the same 25 kW generator it will have a higher capacity factor and a better swept area to cost ratio. Because the blades will be aligned to appear as four 36' blades, it will have 1/3 the drag-creating blade ends and an improved aspect ratio.
| The Model 530G has been proven through ten thousand plus hours of
field-testing. Its extruded blades use 6061 T6 aluminum and, like all
WHI turbines, have moment-free connections to the blade arms, which
contribute greatly to their durability. New computer modeling shows
that the blades can be aligned so that instead of the three modules of
blades in the Model 530G, where each blade had two unique blade arms,
the Model 636G’s blades share blade arms between modules. This reduces
blade arms from 24 in the Model 530G to 16 in the Model 636G and 24 blade
end connections to 8, with a similar reduction in drag. The alignment
of the blades also will realize a greater aspect ratio and thus more
lift and efficient conversion of wind energy to torque. The Model 636G will have a 25 kW generator and can be installed as a single turbine or as Linear Array Vortex Turbine Systems (LAVTS) of two turbines or more. In a LAVTS formation, the per turbine energy output will increase because of the “coupled vortex” effect. The predicted per turbine energy output in a three array is listed below. |  Side view of single Model 636G turbine. Click here for larger view |
Model 636G Technical Specifications (Single Turbine)
| Type | Vertical Axis, Straight Blade | Swept Area | 636 ft2 (59.1 m2) |
| Power | 25 kW (25/6 kW with 2-speed generator) | Superstructure Height | 58.9 feet (17.95 m) |
| Voltage | 400v/50HZ | Generation Rotor Speed | 85 RPM |
| Type of Generator | Induction | Cut-in Windspeed | 13.8 MPH (6.17 m/s) |
| Rotor Diameter | 17.7 feet (5.38m) | Max generation Windspeed | 65 mph (29.1 m/s) |
| Blade Length | 12 feet (3.66m) | Design Windspeed | 125 mph (55.9 m/s) |
| Blade Cord Length | 17.4 in.(441.9mm) | Type of Brake | Fail-safe Mechanical and Aerodynamic |
| Number of Blades | 12 (4 blades per module, 3 aligned modules per rotor) | Brake Articulation | Mechanical and Pneumatic |
| Number of Modules | 3 | Fully Installed Cost | $2,500-$4,500 / kW |
*when installed in a 3-rotor LAVTS
Expected Model 636G Energy Output*
| Windspeed (mph) | Windspeed (m/s) | One-Speed Generator (25kW) | Two-Speed Generator (6kW & 25kW) |
| --- | --- | Annual Energy Output (kWh) | Annual Energy Output (kWh) |
| 12 | 5.4 | 16,500 | 24,300 |
| 13 | 5.8 | 22,000 | 30,636 |
| 14 | 6.3 | 28,100 | 37,300 |
| 15 | 6.7 | 34,500 | 44,200 |
| 16 | 7.2 | 41,150 | 51,190 |
| 17 | 7.6 | 47,900 | 58,170 |
| 18 | 8.0 | 54,600 | 65,070 |
