Kestrel e150i | FAQs | Site Map | Bookmark this site!
Home > Learning Center > Kestrel e150i
Kestrel e150i
The Kestrel e150i is short for the intimidating name Kestrel e150i 600W Wind Turbine 6 Blade 110VDC 30965. That long, convoluted name actually tells you quite about the wind turbine in question. The e150 is the smallest line of turbines that Kestrel makes, and it’s rated at 600 watts. That is the indication of the maximum power output under idealized conditions. That number assumes that you don’t include a cut out speed for the turbine, and that it runs at maximum capacity.
So what are cutout speeds and what is maximum capacity? A cutout speed is induced for large wind turbines for safety and structural integrity. Turbines are now built to be self stalling, which means that the blades are curved so that each blade produces turbulence for the blade behind it to encounter. This is done to help negate the lift that the blades produce. That is the same lift that drove the first plane manufacturers to use a propeller as their engine of choice. While it is a good thing in a plane, lift in a turbine is detrimental to the structural integrity of the whole. You in effect have a speed at which the blades are trying to take off and leave the rest of the structure behind. The Kestrel e150i, like most modern turbines induces turbulence to stall the blades, which is the best way to negate the lift they create.
This stalling is much like the same maneuver a plane goes through. When the angle of the lift becomes too extreme, the bottom falls out from an airfoil, causing it to fall. Since the wind turbine is held in one place and rotating about an axis, this means that when the Kestrel e150i is operating in wind speeds fast enough to induce blade stall, the structure is being subjected alternating lifting and downward stresses. In small turbines like the Kestrel e150i these forces are not great enough to cause structural harm. However in a large industrial scale wind turbine, the turbine can literally tear itself apart in high enough wind.
To counter this, the generator can be used as an engine brake for the exterior turbine blades, forcing them to not exceed a certain rotational velocity. This is what a manufacturer refers to as a cut out speed. So if a turbine has a cutout speed of 100 rpm, any wind speeds that cause it to rotate in excess of that have their power diverted into slowing the rotation down. Rather than generating additional electricity.
The next portion of the name, 6 blade; is nearly self explanatory. This particular model utilizes a six bladed configuration to get more out of low wind speeds, which gives it a lower cut in speed than the competition.Following that is a fairly important bit of information, which is the 110VDC. This stands for 110 volts direct current. That is the type of power the turbine produces. What this means for you is that it produces enough for most household appliances, but you need to purchase an inverter to convert it to alternating current before using it in the home. However because it is direct current, you can use it to charge fuel cells before diverting it to the house, which makes for a great energy storage option as well. The final portion of the name is the serial number, which is given to the Kestrel e150i by the manufacturer.
Jump to most popular search results:
Home Wind Turbines | Generators
| Vertical | Home
Wind Power Kits | Residential
| Windmills | Small
| Turbine Parts | Rooftop
| Wind Power | DIY
| Portable
Home |
Exchanges and Returns | Privacy
Policy | Contact
Us | About Us
| Shipping Policies
| Learning
Center | Wind Estimator | Tax
Credits
Copyright © 1998 - 2010