Environmentalists hate American Bald Eagles and Urge the Building of Eagle Killing Machines

Posted by PITHOCRATES - November 23rd, 2013

Week in Review

We have spent billions building wind farms all over the world.  To fight the rise of manmade global warming.  By replacing dirty, filthy, polluting, carbon-producing, global-warming-generating coal-fired power plants.  Which haven’t replaced many if any coal-fired power plants.  Because we still need those coal-fired power plants to provide electric power when the wind doesn’t blow.  Or blows too strong.  Making the whole wind power industry a costly joke.  Well, a costly sad joke.  As those great spinning killing machines are killing some of our most precious natural resources.  American Bald Eagles (see Energy company to pay out $1m over eagle deaths at wind farms by AP posted 11/23/2013 on The Telegraph).

The U.S. government for the first time has enforced environmental laws protecting birds against wind energy facilities, winning a $1 million settlement from a power company that pleaded guilty to killing 14 eagles and 149 other birds at two wind farms in the western state of Wyoming.

The Obama administration has championed pollution-free wind power and used the same law against oil companies and power companies for drowning and electrocuting birds. The case against Duke Energy Corp. and its renewable energy arm was the first prosecuted under the Migratory Bird Treaty Act against a wind energy company…

An investigation by The Associated Press in May revealed dozens of eagle deaths from wind energy facilities, including at Duke’s Top of the World farm outside Casper, Wyoming, the deadliest for eagles of 15 such facilities that Duke operates nationwide. The other wind farm included in the settlement is in nearby Campbell Hill…

A study in September by federal biologists found that wind turbines had killed at least 67 bald and golden eagles since 2008. That did not include deaths at Altamont Pass, an area in northern California where wind farms kill an estimated 60 eagles a year.

Until Friday’s announcement, not a single wind energy company had been prosecuted for a death of an eagle or other protected bird – even though each death is a violation of federal law…

Wind farms are clusters of turbines as tall as 30-story buildings, with spinning rotors as wide as a passenger jet’s wingspan. Though the blades appear to move slowly, they can reach speeds up to 170mph at the tips, creating tornado-like vortexes.

Flying eagles behave like drivers texting on their cellphones; they don’t look up. As they scan for food, they don’t notice the industrial turbine blades until it’s too late…

Once a wind farm is built, there is little a company can do to stop the deaths. Some firms have tried using radar to detect birds and to shut down the turbines when they get too close. Others have used human spotters to warn when birds are flying too close to the blades. Another tactic has been to remove vegetation to reduce the prey the birds like to eat.

As part of the agreement, Duke will continue to use field biologists to identify eagles and shut down turbines when they get too close. It will install new radar technology, similar to what is used in Afghanistan to track missiles. And it will continue to voluntarily report all eagle and bird deaths to the government.

Here’s a thought.  Instead of spending billions to build wind turbines.  And additional God knows how much more for radar technology and human bird spotters to shut down the wind turbines when birds are near.  Or razing the earth to kill the ecosystem for the wildlife that eagles feed on.  Instead of doing these things why not just use coal-fired power plants?  After all, what do you think will provide our electric power when radar or those human spotters shut down those wind turbines?  That’s right.  Coal-fired power plants.

Of course the environmentalists hate the modern industrial world.  And using energy to raise our standard of living.  They’d like to go back to a time when we grew our own food.  And spun our own clothing.  For them the modern world is an obscene abomination to them.  With America being the worst.  As we are the most advanced nation in the world.

It’s bad enough the environmentalists are raising the cost of electric power with their renewable energy nonsense.  But they’re also killing American Bald Eagles.  Sure, the glorious American Bald Eagle may not be as important to them as a forest rodent (preventing the cutting of firebreaks in forests to prevent the spread of forest fires) or delta smelt (shutting down the irrigation pumps in California’s Central Valley that provides much of our food), but they are a living creature, too.  And should be allowed to live freely in their habitat.  Then again, perhaps they don’t care about the American Bald Eagle.  As it is America’s national bird.  And they just hate America so much that they hate our national bird, too.

www.PITHOCRATES.com

Share

Tags: , , , , , , , , , , , , , ,

Windmills, Rotational Energy, Wing, Lift, Rotary Wing, Angle of Attack, Variable-Pitch Propellers, Drag, AC Power and Wind Turbine

Posted by PITHOCRATES - June 27th, 2012

Technology 101

When an Aircraft Rotates for Takeoff it increases the Angle of Attack of the Wing to Create more Lift

Early windmills turned when the wind pushed a sail or vane.  Thereby converting wind energy into rotational energy.  Mechanical linkages and shafts transferred this rotational motion to power a mill.  Or pump water.  As well as an assortment of other tasks.  Whatever the task it was important to regulate the speed at which the shaft rotated.  Which meant turning the windmill into the wind.  And adjusting the amount of sail catching the wind.  Much like on a sailing ship.  At first by shutting the windmill down and manually adjusting the sails.  Then later automating this process while the windmill was turning.  If the winds were too strong they’d lock the windmill to prevent it from turning.  To prevent damaging the windmill.

They regulated the speed to protect the equipment attached to the windmill, too.  To prevent a mill stone from spinning too fast.  Risking damage to it.  And harm to the people working with the equipment.  Or to protect a water pump form pumping too fast.  Even the small farm windmills had over-speed protection.   These sat atop a well.  The windmill drove a small piston to pump the water up the well shaft.  To prevent this windmill from flying apart in high winds over-speed features either furled the blades or rotated the windmill parallel to the wind.  Shutting the pump down.

But wind just doesn’t push.  It can also lift.  A lateen (triangular) sail on a sailing vessel is similar to an aircraft wing.  The leading edge of the sail splits the wind apart.  Part of it fills the sail and pushes it.  Bowing it out into a curved surface.  The wind passing on the other side of the sail travels across this curved surface and creates lift.  Similar to how a wing operates during takeoff on a large aircraft.  With the trailing edge flaps extended it creates a large curve in the wing.  When the aircraft rotates (increasing the angle of attack of the wing) to take off wind passing under the wing pushes it up.  And the wind travelling over the wing pulls it up.  These lift forces are so strong that planes carry their fuel in the wings and mount engines on the wing to keep the wings from bending up too much from these forces of lift.

A Pilot will Feather the Propeller on a Failed Engine in Flight to Minimize Drag 

When an aircraft carrier launches its aircraft it turns into the wind.  To maximize the wind speed travelling across the wings of the aircraft.  For the faster the wind moves across the wing the great lift it creates.  Commercial airports don’t have the luxury of turning into the wind.  So they lay their runways out to correspond to the prevailing wind directions.  As weather systems move through the region they often reverse the direction of the wind.  When they do planes take off in the other direction.  If the winds are somewhere in between these two extremes some airports have another set of runways called ‘crosswind’ runways.  Or trust in the highly skilled pilots flying out of their airports to adjust the control surfaces on their planes quickly and delicately to correct for less than optimal winds.

Helicopters don’t have this problem.  They can take off facing in any direction.  Because that big propeller on top is a rotary wing.  Or rotor.  A fixed wing airplane needs forward velocity to move air over their wings to create lift.  A helicopter moves air over its rotary wing by spinning it through the air.  To create lift the pilot tilts the rotor blades to change their angle of attack.  And tilts the whole rotor in the direction of travel.  The helicopter’s engine runs at a constant RPM.  To increase lift the angle of attack is increased.  This also creates drag that increases the load on the engine, slowing it down.  So the pilot increases the throttle of the engine to return the rotor to that constant RPM.

Propeller-powered airplanes also have variable-pitch propellers.  To create the maximum possible lift at the lowest amount of drag.  So it’s not just engine speed determining aircraft speed.  When running up the engines while on the ground the pilot will feather the propellers.  So that the blade pitch is parallel to the airflow and moves no air.  This allows the engines to be run up to a high RPM without producing a strong blast of air behind it.  A pilot will also feather the prop on a failed engine in flight to minimize drag.  Allowing a single-engine plane to glide and a multiple engine plane to continue under the power of the remaining engines.  A pilot can even reverse the pitch of the propeller blades to reverse the direction of airflow through the propeller.  Helping planes to come to a stop on short runways.

By varying the Blade Pitch for Different Wind Speeds Wind Turbines can Maintain a Constant RPM

Thomas Edison developed DC electrical power.  George Westinghouse developed AC electrical power.  And these two went to war to prove the superiority of their system.  The War of the Currents.  Westinghouse won.  Because AC is economically superior.  One power plant can power a very large geographic area.  Because alternating current (AC) works with transformers.  Which stepped up voltages for long-distance power transmission.  And then stepped them back down to the voltages we use.  Power equals voltage times current.  Increasing the voltages allows lower currents.  Which allows thinner wires.  And fewer generating plants.  Which saves money.  Hence the economic superiority of AC power.

Alternating current works with transformers because the current alternates directions 60 times a second (or 60 cycles or hertz).  Every time the currents reverse an electrical field collapses in one set of windings of a transformer, inducing a voltage in another set of windings.  A generator (or, alternator) creates this alternating current by converting rotational energy into electrical energy.  Which brings us back to windmills.  A source of rotational energy.  Which we can also use to generate electrical energy.  But unlike windmills of old, today’s windmills, or wind turbines, turn from lift.   The wind doesn’t push the blades.  The wind passes over them producing lift.  Like on a wing.  Pulling them into rotation.

The typical wind turbine design is a three-bladed propeller attached to a nacelle sitting on top of a tall pylon.  The nacelle is about as large as a big garden shed or a small garage.  Inside the nacelle are the alternator and a gearbox.  And various control equipment.  Like windmills of old wind turbines still have to face into the wind.  We could do this easily and automatically by placing the propeller on the downwind side of the nacelle.  Making it a weathervane as well.  But doing this would put the pylon between the wind and the blades.  The pylon would block the wind causing uneven loading on the propeller producing vibrations and reducing the service life.  So they mount the propeller on the upwind side.  And use a complex control system to turn the wind turbine into the wind.

When it comes to electrical generation a constant rotation is critical.  How does this happen when the wind doesn’t blow at a constant speed?  With variable-pitched blades on the propeller.  By varying the blade pitch for different wind speeds they can maintain a constant number of revolutions per minute (RPM).  For a limited range of wind conditions, that is.  If the wind isn’t fast enough to produce 60 hertz they shut down the wind turbine.  They also shut them down in high winds to prevent damaging the wind turbine.  They can do this by feathering the blades.  Turning the propeller blades parallel to the wind.  Or with a mechanical brake.  The actual rotation of the propeller is not 60 cycles per second.  But it will be constant.  And the gearbox will gear it up to turn the alternator at 60 cycles per second.  Allowing them to attach the power they produce to the electric grid.

www.PITHOCRATES.com

Share

Tags: , , , , , , , , , , , , , , , , , , , , , , , , , , ,