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Generating electricity from air flow (it's a breeze)
American Institute of Physics ^ | Nov 22, 2009 | Unknown

Posted on 11/22/2009 7:34:38 AM PST by decimon

WASHINGTON, D.C. November 13, 2009 -- A group of researchers at the City College of New York is developing a new way to generate power for planes and automobiles based on materials known as piezoelectrics, which convert the kinetic energy of motion into electricity. They will present their concept later this month at the 62nd Annual Meeting of the American Physical Society's (APS) Division of Fluid Dynamics will take place from November 22-24 at the Minneapolis Convention Center.

About a half-inch by one inch in size, these devices might be mounted on the roof or tail of a car or on an airplane fuselage where they would vibrate inside a flow, producing an output voltage. The power generated would not be enough to replace that supplied by the combustion engines, but it could run some system -- such as batteries that would be used to charge control panels and other small electronic devices such as mobile phones.

Led by CCNY professor Yiannis Andreopoulos, the researchers are currently attempting to optimize these devices by modeling the physical forces to which they are subjected in different air flows -- on the roof of a car, for instance, or on the back of a truck.

When the device is placed in the wake of a cylinder -- such as on the back of a truck -- the flow of air will cause the devices to vibrate in resonance, says Andreopoulos. On the roof of car, they will shake in a much more unsteady flow known as a turbulent boundary layer. In Minneapolis, Andreopoulos and his colleagues will present wind tunnel data showing how the devices work in both situations.

"These devices open the possibility to continuously scavenge otherwise wasted energy from the environment," says Andreopoulos.

###

The presentation, "Harvesting energy in the wake of a circular cylinder using piezoelectric materials" by Dogus H. Akaydin, Niell Elvin, and Yiannis Andreopoulos of the City College of New York is at 8:00 a.m. on Sunday, November 22, 2009.

Abstract: http://meetings.aps.org/Meeting/DFD09/Event/110728

The presentation, "Harvesting energy from turbulence in boundary layers by using piezoelectric generators" by Yiannis Andreopoulos, Dogus H. Akaydin, and Niell Elvin of the City College of New York is at 8:52 a.m. on Monday, November 23, 2009.

MORE MEETING INFORMATION

The 62nd Annual DFD Meeting is largest scientific meeting of the year devoted to the fluid dynamics, it brings together researchers from around the globe to present work with applications in engineering, energy, physics, climate, astronomy, medicine, and mathematics. It will be held at the Minneapolis Convention Center in downtown Minneapolis. All meeting information, including directions to the Convention Center is at: http://www.dfd2009.umn.edu/

PRESS REGISTRATION

Credentialed full-time journalist and professional freelance journalists working on assignment for major publications or media outlets are invited to attend the conference free of charge. If you are a reporter and would like to attend, please contact Jason Bardi (jbardi@aip.org, 301-209-3091).

USEFUL LINKS

Main meeting Web site: http://meetings.aps.org/Meeting/DFD09/Content/1629

Searchable form: http://meetings.aps.org/Meeting/DFD09/SearchAbstract

Local Conference Meeting Website: http://www.dfd2009.umn.edu/

PDF of Meeting Abstracts: http://flux.aps.org/meetings/YR09/DFD09/all_DFD09.pdf

Division of Fluid Dynamics page: http://www.aps.org/units/dfd/

Virtual Press Room: SEE BELOW

VIRTUAL PRESS ROOM

The APS Division of Fluid Dynamics Virtual Press Room will contain tips on dozens of stories as well as stunning graphics and lay-language papers detailing some of the most interesting results at the meeting. Lay-language papers are roughly 500 word summaries written for a general audience by the authors of individual presentations with accompanying graphics and multimedia files. The Virtual Press Room will serve as starting points for journalists who are interested in covering the meeting but cannot attend in person. See: http://www.aps.org/units/dfd/pressroom/index.cfm

Currently, the Division of Fluid Dynamics Virtual Press Room contains information related to the 2008 meeting. In mid-November, the Virtual Press Room will be updated for this year's meeting, and another news release will be sent out at that time.

ONSITE WORKSPACE FOR REPORTERS

A reserved workspace with wireless internet connections will be available for use by reporters. It will be located in the meeting exhibition hall (Ballroom AB) at the Minneapolis Convention Center on Sunday and Monday from 8:00 a.m. to 5:00 p.m. and on Tuesday from 8:00 a.m. to noon. Press announcements and other news will be available in the Virtual Press Room.

GALLERY OF FLUID MOTION

Every year, the APS Division of Fluid Dynamics hosts posters and videos that show stunning images and graphics from either computational or experimental studies of flow phenomena. The outstanding entries, selected by a panel of referees for artistic content, originality and ability to convey information, will be honored during the meeting, placed on display at the Annual APS Meeting in March of 2010, and will appear in the annual Gallery of Fluid Motion article in the September 2010 issue of the journal Physics of Fluids.

This year, selected entries from the 27th Annual Gallery of Fluid Motion will be hosted as part of the Fluid Dynamics Virtual Press Room. In mid-November, when the Virtual Press Room is launched, another announcement will be sent out.

ABOUT THE APS DIVISION OF FLUID DYNAMICS

The Division of Fluid Dynamics of the American Physical Society exists for the advancement and diffusion of knowledge of the physics of fluids with special emphasis on the dynamical theories of the liquid, plastic and gaseous states of matter under all conditions of temperature and pressure. See: http://www.aps.org/units/dfd/


TOPICS: Business/Economy; Science
KEYWORDS: air; electricity; energy; flow; generating; generator; piezoelectric; piezoelectrics
Maybe your cellphone will recharge itself when outdoors. Or the cell towers.
1 posted on 11/22/2009 7:34:39 AM PST by decimon
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To: decimon

.....And in further energy news, Hamsters blowing on an ice cube can cool the room!


2 posted on 11/22/2009 7:38:11 AM PST by TRY ONE (NUKE the unborn gay whales!)
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To: decimon

The piezoelectric effect is a fascinating thing limited in usage. It will produce High voltages but not high current.

Voltage is “potential” Current gets things done.

We typically use the inverse of the piezoelectric effect, applying voltage to a crystal to cause it to oscillate as a clock, because it is far more useful to take advantage of this phenomena than it is to apply pressure to the crystal in order to produce voltage.

The idea that we can use crystals for serious production of energy is shocking


3 posted on 11/22/2009 7:43:08 AM PST by mylife
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To: decimon

I guess they’ll change the operation from picking up vibrations from a guitar to just using wind.


4 posted on 11/22/2009 7:44:54 AM PST by wastedyears (My 15 seconds of fame are on my profile.)
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To: decimon
Just great, lug around heavy batteries to hold the feeble charge that piezoelectrics give. Not to mention the air drag the panels will cause.

That's why combustion engines have magnetos, and alternators!

Just another distraction, from the solution staring us in the face.

5 posted on 11/22/2009 7:45:30 AM PST by rawcatslyentist (Jeremiah 50:31 Behold, I am against you," O " you most proud, said the said the Lord GOD of hosts)
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To: TRY ONE

There are so many suckers who believe that wind and sun will solve our problems.

Will it help? Maybe but at great expense.

Fossil fuels are cheap and readily available.


6 posted on 11/22/2009 7:47:14 AM PST by dhs12345
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To: decimon

One if the most fascinating things I have seen in mylife was a landslide down the face of a Lantern Hill in Connecticut in the dead of night.

The Hill is made of a silica rock which displays piezoelectric property’s. Any how, as the rockslide occured it produced blue arcing electric flashing and the entire hill was washed with the blue light as the wave of stone washed down the hill.

Fascinating effect


7 posted on 11/22/2009 7:53:12 AM PST by mylife
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To: decimon

Maybe they plan to generate electricity on a windy day when the car is parked. Otherwise, it’s just going to slow the car down. I doubt it’s any more efficient than the conventional method and the amount of energy required to charge a cell phone is minuscule.


8 posted on 11/22/2009 7:53:27 AM PST by Maurice Tift (You can't stop the signal, Mal. You can never stop the signal.)
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To: dhs12345
There are so many suckers who believe that wind and sun will solve our problems.

But that claim is not here being made.

9 posted on 11/22/2009 7:55:40 AM PST by decimon
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To: decimon

BTW as we camped at the top of of the hill we built a campfire of wood because striking silica rocks for warmth was worthless


10 posted on 11/22/2009 7:56:52 AM PST by mylife
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To: decimon

Maybe I can use this to jumpstart my perpetual motion machine.


11 posted on 11/22/2009 8:01:08 AM PST by oblomov
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To: decimon
“piezoelectrics” ?????

Is that the ‘pie in the sky” I've heard so much about? I'll have a slice please (I love pie!).

12 posted on 11/22/2009 8:01:26 AM PST by Ditter
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To: mylife
That sounds very cool. I'm surprised about the wood fire, though. I'd think the necessary repeated striking of the rock would require enough energy that you'd all be quite warm in no time.
13 posted on 11/22/2009 8:03:02 AM PST by FourPeas (Why does Professor Presbury's wolfhound, Roy, endeavour to bite him?)
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To: mylife

Were you washing something when you wrote this?


14 posted on 11/22/2009 8:05:10 AM PST by 1raider1
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To: decimon

There is already a company that manufactures this product. They are called Humdinger Wind Energy. These devices create so little power, they are useful for almost nothing.


15 posted on 11/22/2009 8:07:06 AM PST by Flightdeck (Go Longhorns)
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To: FourPeas
LoL! Nope it wasnt working. ☺
16 posted on 11/22/2009 8:08:10 AM PST by mylife
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To: 1raider1

Wash/wave whatever. I was using the word as a descriptor.


17 posted on 11/22/2009 8:10:17 AM PST by mylife
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To: decimon
No. Understand.

But, we are betting our future on lies. And there is a lot of false hope.

Two issues: we Americans consume a lot of energy AND the only viable sources are not allowed.

There is a plan to kill coal. What will replace it? Nuclear is out, too. And hydroelectric — no. Whats left? Solar, Wind???

All the while, the clock is ticking... power plants are getting old and demand is increasing. And we are betting our future on wind and solar.

Sorry... the emperor is NOT wearing any clothes.

18 posted on 11/22/2009 8:13:59 AM PST by dhs12345
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To: FourPeas

BTW Connecticut has fascinating geology. Not only is the place loaded with this silica, it has a ton of mica which also has interesting electrical properties


19 posted on 11/22/2009 8:14:23 AM PST by mylife
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To: decimon

No doubt all the “perpetual motioners” will get all excited about this bogus article.

Once again, I will invoke the second law of thermodynamics.

Any miniscule amount of energy that is generated comes from a miniscule amount of gasoline for which the driver paid a miniscule amount.

Since the energy from your wall socket cost less than gasoline, you are better off plugging it in at home, if you care.

Otherwise, you are better off plugging it into the lighter socket that is already in your car.


20 posted on 11/22/2009 8:16:47 AM PST by keat
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To: decimon

Don’t scoff...check out what Shawn Frayne aka Humdinger Wind Energy has been doing with the windbelt. Videos on Youtube or: http://www.humdingerwind.com/

There’s plenty of room for innovation.


21 posted on 11/22/2009 8:17:38 AM PST by bigbob
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To: dhs12345

But none of that has anything to do with this.


22 posted on 11/22/2009 8:21:13 AM PST by decimon
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To: Flightdeck
There is already a company that manufactures this product.

I kinda doubt they are researching what exists in a commercial product.

23 posted on 11/22/2009 8:22:51 AM PST by decimon
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To: decimon

Energy from passing wind? The potential is boundless!


24 posted on 11/22/2009 8:25:48 AM PST by norwaypinesavage (The trouble liberals isn't that they are ignorant; it is that they know so much that isn't so.)
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To: decimon
Two hot teenagers on a couch can generate pretty good electricity too.
25 posted on 11/22/2009 8:26:38 AM PST by 1776 Reborn (Test kids and politicians (bigger idiots) on the Constitution!)
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To: decimon

“I kinda doubt they are researching what exists in a commercial product.”

Go to humdingerwind.com

They use belts, while this group uses cylinders. Either way, its pretty useless, except perhaps as a sensor or diagnostic device.


26 posted on 11/22/2009 8:34:56 AM PST by Flightdeck (Go Longhorns)
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To: rawcatslyentist
"These devices open the possibility to continuously scavenge otherwise wasted energy from the environment," says Andreopoulos.

I am glad these guys do not design airplanes.

The best way to conserve energy in a vehicle is to make it as aerodynamic as possible. These chips will cause more drag and net energy loss as they can not be 100% efficient.

I think these boys skipped their classes in Thermodynamics and they damn sure know nothing about boundary layer effect as related to drag and energy loss.

27 posted on 11/22/2009 8:37:26 AM PST by cpdiii (roughneck, oilfield trash and proud of it, geologist, pilot, pharmacist, iconoclast.)
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To: decimon

Also, mounting these on cars is a stupid idea, and I should know because I have had plenty! The drag induced by this device will require just a tiny bit more power output from the engine to maintain speed. How much more? Just a fraction more than what is generated by the device.


28 posted on 11/22/2009 8:39:00 AM PST by Flightdeck (Go Longhorns)
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To: cpdiii

I hadn’t read your reply before posting mine beneath, but I agree.


29 posted on 11/22/2009 8:39:57 AM PST by Flightdeck (Go Longhorns)
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To: norwaypinesavage

I have idea for Booolsheeeet Pizzeo Energy Generator:
Take the output of the piezzzoo microphonies in Congress, rectify the current, charge batteries and sell it back to them, tax included.


30 posted on 11/22/2009 8:42:21 AM PST by Leo Carpathian (fffffFRrrreeeeepppeeee-ssed!)
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To: Leo Carpathian

I like it. Lots of Hot BS produced in congress.


31 posted on 11/22/2009 9:05:15 AM PST by mylife
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To: Flightdeck
The drag induced by this device will require just a tiny bit more power output from the engine to maintain speed.

How do you know it will induce drag without knowing how it will be mounted?

32 posted on 11/22/2009 9:13:45 AM PST by decimon
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To: mylife

Piezoelectrics are also used in those portable propane torches, of the type that Burnz-O-matic makes.

They have a finger operated trigger connected to an impeller so that when you press it down the impeller will strike a piezoelectric crystal, the voltage produces a spark in the nozzle of the torch which lights the propane. All the energy to light the torch comes from your finger pressing down on the trigger. With no batteries, the lighting mechanism will last virtually forever.


33 posted on 11/22/2009 9:15:12 AM PST by eclecticEel (The Most High rules in the kingdom of men ... and sets over it the basest of men.)
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To: eclecticEel

Heyup. They work great for that. Its the propane that actually gives useful energy. The crystal just provides a convenient spark.

Take away the propane and you just have a parlor trick.


34 posted on 11/22/2009 9:18:22 AM PST by mylife
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To: All
Piezoelectric Demonstration
35 posted on 11/22/2009 9:27:33 AM PST by mylife
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To: decimon

“How do you know it will induce drag without knowing how it will be mounted?”

If it doesn’t induce drag, it won’t generate any energy. That’s how the power is extracted. No free lunch.


36 posted on 11/22/2009 9:35:48 AM PST by Flightdeck (Go Longhorns)
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To: decimon
Nothing new about Piezo devices, the most common ones are crystals found in electronics equipment. They don't produce a very big voltage but are perfect for transmitters, oscillators etc. It would take a pretty big crystal to put out enough juice to charge a car battery. Piezos can produce a current when vibrated and in turn vibrate when a current is passed through them, which produces another current of a different frequency.

This is just more BS to lull the masses I would think.

37 posted on 11/22/2009 9:45:05 AM PST by calex59
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To: Flightdeck
The problem here is there is no usable current produced.

Only potential. Thats great in itself, and can be used to as a measure and a clock, it can act as a meter to lots of inputs but it doesn't produce any real workhorse energy, without amplification of current its pretty useless

No work gets done without current. Use this phenomena to sense a vibrating guitar string, and modulate a high power vacuum tube which regulates electron flow and Eureka! we have something of use.

Amplification

38 posted on 11/22/2009 9:51:26 AM PST by mylife
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To: Leo Carpathian
I have idea for Booolsheeeet Pizzeo Energy Generator: Take the output of the piezzzoo microphonies in Congress, rectify the current, charge batteries and sell it back to them, tax included.

I have an idea, we could hook up all the members of the house and senate, the cabinet members, all the czars, the president and vp and have them run generators like hamsters. We should be able to power at least one small city, in between running in the wheel they can sling enough BS to power another small city. Finally, a solution that works. They would be far more usefull and less likely to screw up American doing that then they do when actually doing their jobs.

39 posted on 11/22/2009 9:54:42 AM PST by calex59
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I note the “Humdinger” is usable from 6 to 20 MPH wind conditions, anything out side of that is outside the designed resonance of the circuit.

Worthless IMHO as a power source


40 posted on 11/22/2009 10:02:04 AM PST by mylife
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“piezo se pueda”


41 posted on 11/22/2009 10:05:30 AM PST by mylife
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To: decimon; AdmSmith; Berosus; bigheadfred; Convert from ECUSA; dervish; Ernest_at_the_Beach; ...

Thanks decimon.

Biofuels and Trash: Turning our Garbage into Energy
Oilprice.com | 23/11/2009 | Oilprice.com
Posted on 11/23/2009 2:25:44 PM PST by staffjam
http://www.freerepublic.com/focus/chat/2392934/posts


42 posted on 11/23/2009 7:06:28 PM PST by SunkenCiv (https://secure.freerepublic.com/donate/__Since Jan 3, 2004__Profile updated Monday, January 12, 2009)
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To: decimon

Perpetual Motioners are the Ron Paulians of the physics world.

They cling to theories that have no basis in fact and then get defensive when you challenge them.

Annoying.


43 posted on 11/24/2009 9:49:02 AM PST by keat
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To: decimon

Just vibrations in the air ...
http://en.wikipedia.org/wiki/Microphone#Piezoelectric_microphone


44 posted on 11/24/2009 11:07:13 AM PST by AdmSmith
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To: dhs12345
There are so many suckers who believe that wind and sun will solve our problems. ...

Fossil fuels are cheap and readily available.

But the wind and sun are free. That's one reason power companies are putting money into wind power, because there is zero fuel cost. This insulates them from fuel price fluctuations. Fossil fuels cost money and are becoming less available.

45 posted on 11/24/2009 11:34:51 AM PST by wideminded
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To: wideminded
Not exactly free. It is and intermittent energy source at best. Plus, wind and solar generation stations are not in the cities but out in the boonies. Means distribution costs are damned expensive. Someones gotta pay for it.

Besides, if it were so effective, why are subsidies so absolutely necessary. It takes an impractical number of years (sometimes will over a hundred years) for the wind and especially solar to pay for itself.

And the reason fossil fuels are less available may be by design. Remember that Obama is going to bankrupt the coal industry. Actually, it has been happening all along through environmental regs.

46 posted on 11/25/2009 9:12:42 AM PST by dhs12345
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To: wideminded
Not exactly free. It is and intermittent energy source at best. Plus, wind and solar generation stations are not in the cities but out in the boonies. Means distribution costs are damned expensive. Someones gotta pay for it.

Besides, if it were so effective, why are subsidies so absolutely necessary. It takes an impractical number of years (sometimes will over a hundred years) for the wind and especially solar to pay for itself.

And the reason fossil fuels are less available may be by design. Remember that Obama is going to bankrupt the coal industry. Actually, it has been happening all along through environmental regs.

47 posted on 11/25/2009 9:12:49 AM PST by dhs12345
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