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Thank you for interesting presentation

Yes - I am considering EH application

Interested in solar and piezo types of energy harvesting

I havent thought of combining any techniques

Concerning slide 9 I imagine the length of the beam is relatede to the frequency of 

max power harvested

you mean slide 8 not slide 13 right?

Currently I am involved a very little with RFID tags these use 

energy harvesting to power the response to a query from a reader device

Looking forward to this one

Hi picking up a few missed lectures

 

@Chuck - no, have not concidered combining (yet)

Iron

@Chuck - solar battery powered sensors

Iron

Great to have access to the recorded sessions...

Iron

Missed the live lecture...

Iron

Thanks Randy and Chuck for today's session. I wasn't aware of the options for energy harvesting. You've opened some new thoughts and potential opprotunities.

Iron

I'm considering energy harvesting for future products to reduce battery consumption.

Iron

interested in harvesting existing energy in the environment.

Iron

no energy harvesting applications right now. wireless energy transfer/harvesting is interesting to me.

Iron

Thanks Randy; excellent presentation

Iron

Energy Harvesting Techniques have made a remarkable leap forward during last years

Iron

We have no energy harvesting project at this time

Iron

also interested in very low power microcontrollers, sensors and peripheral interface chips

Iron

interested, studying and evaluating available energy harveting techniques in solar, TEG, vibration, electromechanical, piezo and RF fields

Iron

interested in energy harvesting apps and storage

Iron

Thanks for today's presentation, Randy.

No, not cosidering a project right now.

I am interested in vibration, electromechanical and RF energy harveting techniques

Interested in remote/wireless sensing and building automation.

Not involved in energy harvesting now.

Thank you for the class

Iron

Thank you.  I'll take a look.

Iron

That's going to do it for today.

Thanks for listening,

Randy

Blogger

For solar applications, there are some nice chips that automatically limit current to keep operation in the most efficient oprating zone for the PV cell (MPPT). But they seem to be very expensive, and not widely stocked. For example, the LTC3105 is $3.33 at 2500, but only 419 in stock at Digi-Key. Do you know of any good chips that are inexpensive and available enough for consumer products?

 Some info provided at teh following link but I do not know if the MPPT is part of their capability:

http://www.digikey.com/us/en/techzone/energy-harvesting/resources/articles/power-management-ics.html

Blogger

Strange. I did NOT just send that.  I sent it 3-1/2 hours ago.

Iron

Good morning.  Enjoying some rare RAIN here in southern California.  Looking forward to hearing about energy harvesting.

Iron

@Chuck Yesterday you asked about suggestions for new classes. Energy harvesting is really interesting and would make a great week long topic. Thanks for including this today Randy.

Iron

Do switches like the one shown on slide 12 require a lot of force to operate?

They replace a typical wall switch so the force cannot be excessively greater but they most likely require a little more effort to achieve the snap action.

Blogger

Nothing at this point.

Iron

Solar is the most cost effective means of Energy Harvesting currently. PVs have a 40-year head start!

TEGs and Piezos will come down in prie as they hit economies of scale.

For solar applications, there are some nice chips that automatically limit current to keep operation in the most efficient oprating zone for the PV cell (MPPT).  But they seem to be very expensive, and not widely stocked.  For example, the LTC3105 is $3.33 at 2500, but only 419 in stock at Digi-Key.  Do you know of any good chips that are inexpensive and available enough for consumer products?

Iron

The MEMS thermoelectric harvester would have to be connected to a hot and cold reservoir. How is this done on a MEMS scale?

The heat exchanger actually is about the same size as a bulk TEG in products that I have seen. The big advantage of the MEMS TEG is similar to MEMS sensors: the wafer level processing can provide consistent, high volume production and a ongoing cost reduction.

Blogger

SciGuy:

The TEG is usually thermall connected to the heat source and the other side is exposed to the cooler ambient air & uses a heat sink to create the temp differential.

Some systems use the temp differential a heating system warm air in the heat plenum and the cooler ambient air of the environment. The reverse could also be used.

Also the differential between hot and cold pipes in a hot water heat system...

The key is the thermal coupling for many of these applications.

 

Is there any applications of these device on the medical area?

 

I know many suppliers have proposed usage in medical applications to keep portable monitoring systems running longer in between charges.

Blogger

Thank you for today's lecture

Iron

The MEMS thermoelectric harvester would have to be connected to a hot and cold reservoir. How is this done on a MEMS scale?

Iron

Do switches like the one shown on slide 12 require a lot of force to operate? 

Iron

Thanks!  Nothing definite at the moment, but this will give me something to think about.

Iron

Yes.  Would likely be a hybrid system with multiple harvesters

Iron

Not right now, but good to know the possibilities. Thanks

Iron

No.

Thanks Randy and Chuck.

Iron

Thkx Randy, Chuck.

Iron

No, still studying and evaluating available energy

Iron

@Chuck - Yes, electromagnetic vibration, TEG.

Iron

Yes we are considering EH.

Thanks Randy!

Iron

I have some midnight engineering projects that could use these types of applications.

Iron

Yes considering EH systems;  Great presentation thanks

Iron

Thanks for the great lecture!!!

Iron

Considering developing an indoor light harvesting product.

Iron

I don't have a current need for energy harvesting but lt's very useful to know about it for the future

Not currently considering EH apps but am interested and in information gathering mode.  Thanks for the presentaiton,

Iron

Excellent...

Thanks very much...

Iron

Not at this time, possibly in the future.

Iron

@Chuck: no plans for energy harvesting application at this time.

Iron

Yes. We are very interested in integrating EH with smart sensors.

Iron

YES,  Thanks Randy & Chuck!

Iron

thanks randy and chuck

Iron

Yes, considering an energy harvesting application.  Solar.

Iron

Super interesting!  Thanks!  Not considering an EH app now, but want to keep informed should one come up...

Iron

No energy harvesting project right now.

Iron

I am considering an EH appl.

Iron

EH application?  not yet, but great info.

thanks, great lecture

no

Great could of used this 20 years ago.

 

Iron

Yes, considering EH apps.

Combination of energy sources for harvesting is a great idea, maximizing effectiveness.  Perhaps solar and human motion combination would be a useful pair.

Iron

we tend to focus a lot on vibration for our purposes

Iron

The piezoelectric and solarmodule is interesting.

Iron

Is there any applications of these device on the medical area?

 

Iron

I want to read your patent app JSP

Iron

I'm interested in harvesting energy from quantum singularities.

Iron

Focusing on vibration and thermal;  from our plant equipment

Iron

This is a really useful slide!

molecular resonance...

Iron

Most likely source for energy harvesting in my area is thermal or solar.  

Iron

piezoelectric technique from a vibration source

Iron

Which ever harvest makes me the most $$$.

Iron

I am most interested in electromechanical and solar EH.

Iron

two probes in a lemon 8^)

Iron

When you suck all this RF energy from the air, is that why my cellphone doesn't work ?

Iron

Looking for solutions; vibration, thermal, solar, RF,....  Anything that can provide power for wireless data aquisition of production equipment.

Iron

Have played with solar, piezioelectric and vibration in experimental apps.

Iron

None at the time, but have had an interest in applications where there are physical issues with conventional wiring.

Iron

Working on a solar powered ID communication device as a home project. Interested in other technologies for background info.

Iron

We are interested in harvesting energy from railroad track.  We have battery powered sensors that are connected to the rail and being able to harvest some of that energy would give our sensors longer life.  

Medical Monitoring

Bldg Automation & Security

Body Area Networks

Interested in vibration(mechanical), thermal, soloar in human application 

Iron

Interested in energy harnessing through human motion, be it cycling or walking.

Iron

not involved for the moment

Iron

@Chuck: no energy harvesting projects at this time.

Iron

Sound Level  A-OK now

Iron

got sound by pressing the start button at the left side.

Stick a human on a bicycle generator and you're gona get more than 25uW/cm^2.

Iron

reseting, reloading, right clicking did not work.

clicking a bunch of times on the triangle play button finally gave me the audio.

Yeah

 

Iron

The Volume level even at 100% is much lower than normal.Can be heard clearly just at a much lower volume level.

Iron

try clicking play button a few times

Iron

i don't even get the "blog talk radio"

Iron

Also electromagnetic (flywheel magnet) as an energy harvesting technique.

Iron

I found a thing to the right of the DN audio red slide rule and timer that turned the speaker icon on finally

 

Iron

I have no audio. Is it on?

 

Iron

reset reload , but will the audio work.

Iron

Good afternoon Randy - had to switch over to Chrome to get audio

Iron

the audio no work to day.

Iron

Thanks, had to take off my pop up blockers and hit it several times

Iron

yes, audio is on. Refresh the page and press the play button on the DN Audio bar at the top

Iron

Had to hit refresh several times and the start button to get audio going.

 

Iron

WORKING THANKS REFRESHED

Iron

@ JackO-07

keep trying, it will come on

 

Iron

Anybody got audio yet?

 

Iron

Right click on the DN Audio bar, select ABOUT ADOBE FLASH PLAYER and allow pop-ups.

The information on sensors has been new and a good review.

try refreshing and hitting start a few times

Iron

NO AUDIO HERE TOO WILL LISTEN TO IT LATER THANKS GUYS.

Iron

Has the audio started yet?

Iron

I am not having as much trouble today as yesterday

Iron

My copy of yesterdays still does not work.

Iron

Hello from Albuquerque, the home of the Albuquerque International Balloon Fiesta.

Iron

Hello from Mich. again

Iron

68 and partly sunny, turning to thunderstorms tonight here in Utah

Iron

Hi from Sunny Cool Boston!

Iron

Good afternoon folks.

Iron

Hi All from California.

Iron

Ola from Midland TX

Iron
Howdy all from Mesquite, NV
Iron

Sunny and cool in Maryland

Iron

Hello from Milwaukee

 

Iron

Hi again for partly cloudy, Huntsville.

Iron

Good Morning/Afternoon From Cloudy San Jose, CA.

It's 56°F now and High of 67°F.

We had Rain, Thunder Storm and Hail last night.

Iron

Howdy folks!   GO STL CARDINALS!   :)

Sunny and cool again in Chicago.

Blogger

Good Morning to everyone as well and the weather is not so nice here. Its a cold dreary day, but I am excited to hear todays lecture as well. Thank you Randy Frank for letting us have part of your time today!

Iron

Good morning.  Enjoying some rare RAIN here in southern California.  Looking forward to hearing about energy harvesting.

Iron


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