Yes, you are applying force to traditional pavement. However, because
of its stiffness, that force is equally reflected back into your foot.
That causes your heel to drop while the ball of your foot essentially
stays stationary. As well, when you begin your next step, the ball of
your foot does not sink down, as it would with a pavegen tile. With the
pavegen, you will have to exert extra energy to overcome the sinkage.
Another way to look at it is that there is conservation of energy - no
over unity energy.
Peri
------ Original Message ------
From: "tomw via EV" <[email protected]>
To: [email protected]
Sent: 25-Jun-15 8:16:13 AM
Subject: Re: [EVDL] EVLN: pavegen.com tiles charge EV from human foot
traffic (v)
You are putting energy into the pavement when you walk pavegen tiles or
not.
You apply force to the pavement when you transfer your body weight from
one
foot to the foot hitting the pavement. The bonds in the molecules
making up
the pavement supply a reaction force by stretching ever so slightly,
then
relaxing back as you transfer weight to the other foot. Mechanical
work is
done to displace the atoms and stretch the bonds. I imagine they just
use
some sort of piezo device to utilize about the same energy with a
somewhat
larger displacement, so you likely wouldn't notice the difference.
Seems it
would be relatively high cost/Wh.
--
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