Jack,

You described a perpetuum mobile machine.

That should tell you enough.

 

BTW, in the previous post I added "I would love to be proven wrong",

so that will tell you how much my mind is made up.

I love seeing a reasoning that includes the laws of physics,

to avoid trying to reason about impossible energy creation.

Kind Regards,

Cor van de Water
Chief Scientist
Proxim Wireless
 
office +1 408 383 7626                    Skype: cor_van_de_water
XoIP   +31 87 784 1130                    private: cvandewater.info

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From: [email protected] [mailto:[email protected]] 
Sent: Friday, August 26, 2016 5:48 PM
To: Cor van de Water; Electric Vehicle Discussion List
Subject: Re: [EVDL] Piezo-power> 10mi of freeway could charge all the
EVs in Burbank-CA(?)

 

Take an inflexible beam (no such thing, even if made of concrete) simply
supported at each end. Put a piezo device at each support end. A wheel
rolls over the support at the near end. Let's say your example is
correct and the surface lowers, causing the vehicle to roll up an
incline. The incline becomes progressively less as the vehicle nears the
center. Now the wheel passes the center of the beam. The piezo at the
far end starts taking progressively more of the load, the one at the
near end takes progressively less, and the vehicle starts going
progressively more and more down hill. Since the uphill and downhill
distances are the same, there is no net loss as compared to the surface
that did not change inclination. And the rise and fall of both the near
end and the far end cause a similar energy output since a rectifier can
be used to gain electricity from both extension and contraction of each
piezo device. And we were able to retrieve "free" electricity (that
would have been wasted otherwise) from the event. Concrete roads have
expansion cracks. Simply put the piezo devices there. Not as effective
as other methods but, then again, we are gaining energy from an
otherwise unutilized (and wasted) resource. Even better, line the entire
underside of the concrete support structure of the concrete strip
(instead of just the simply supported ends) this way and you have
potentially multiplied the energy gain significantly. (Or not, if the
energy gain per deflection is linear and only the two piezo devices can
handle and transmit the entire energy transfer).  

 

        I am quite sure that more than 99% of that
        energy will come from the cars traveling that road experiencing
a higher
        loss, especially when we are talking about a concrete freeway
surface." 

 

This entire proposal is utilizing the VERTICAL forces of the vehicle!
These exist even if there were no rolling resistance and do not rely on
any significant changes in HORIZONTAL forces (or rolling resistance) to
capture. These exist by nature and are currently being completely
wasted. When you (or a vehicle) goes on and off a scale, how much energy
is "wasted". The energy I lose stepping up on the scale is gained back
when I step off (shame extensive energy isn't lost, it would make my
weight loss challenge MUCH simpler). This is the same principle. 

 

Wow... 99%?!? Guess you don't happen to have any data to back that up,
do you? 

 

Since your mind is already made up, the energy of me typing further is
wasted and can better be utilized elsewhere. 

 

Finally, is this approach cost effective? Heck, I have no idea, I
haven't even read the linked paper.  But dismissing this offhand seems
no different to me than all the anti-EV people I meet that off hand
claim EVs are a stupid idea with no real data or information to back up
their preconceived conclusion based 100% on personal opinion. 

 

 

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