Really? Is rolling resistance so high that there's energy to power
Burbank? I'm not going to do the math but it sounds preposterous. Ok,
some of the math: 105000 homes at an average of 1MWh/month. That's
10.5GWh/month or 14.5Mwh/hour. So, that strip of highway needs to
produce 14.5Mw. Still seems preposterous.
Really, again? Even if all those cars rolling on the highway can produce
14.5Mw, is that a good idea? Seems we want to reduce rolling resistance
and make EVs (and other vehicles) more efficient. To give the benefit of
the doubt, maybe it's a tradeoff and the rolling resistance of asphalt
is being traded for that of piezoelectrics.
Peri
------ Original Message ------
From: "brucedp5 via EV" <[email protected]>
To: [email protected]
Sent: 26-Aug-16 2:40:55 AM
Subject: [EVDL] Piezo-power> 10mi of freeway could charge all the EVs in
Burbank-CA(?)
http://www.awaken.com/2016/08/california-freeways-will-soon-generate-electricity/#14718579495901&action=collapse_widget&id=0&data=
California Freeways Will Soon Generate Electricity
August 22, 2016 Laura Goldman
[image
http://www.awaken.com/wp-content/uploads/2016/08/1.jpg
]
Energy conservation is probably not the first thing that comes to mind
when
you think about freeways jammed with idling vehicles…
Awaken
But in California, which has some of the most congested freeways in the
country, that’s about to change. The California Energy Commission (CEC)
has
approved a pilot program in which piezoelectric crystals will be
installed
on several freeways.
No, these aren’t some kind of new-agey crystals with mystical powers.
Piezoelectric crystals, about the size of watch batteries, give off an
electrical discharge when they’re mechanically stressed, such as when a
vehicle drives over them. Multiply that by thousands of vehicles and it
creates an electric current that can be harvested to feed the grid.
In fact, scientists estimate the energy generated from piezoelectric
crystals on a 10-mile stretch of freeway could provide power for the
entire
city of Burbank (population: more than 105,000).
“I still get stopped on the street by people who ask what happened to
the
idea of using our roads to generate electricity,” said Mike Gatto, a
Los
Angeles assemblyman, in a press releaseannouncing the program.
“California
is the car capital of the world and we recycle just about everything.
So why
not capture the energy from road vibrations and put it to good use?”
Piezoelectric-based energy‐harvesting technology is already being used
in
other countries. Since 2009, all the displays in the East Japan Railway
Company’s Tokyo station have been powered by people walking on the
piezoelectric flooring. Italy has signed a contract that will install
this
technology in a portion of the Venice-to-Trieste Autostrada. Israel is
already using this technology on some highways, which is how Gatto got
the
idea for the pilot program in California. A friend returning from a
trip to
Israel raved about a road that produced energy.
“If piezoelectric‐based technology has the potential to match the
performance, reliability and costs of existing or emerging renewable
energy
sources, then it can potentially diversify California’s resource
portfolio
and ultimately increase grid reliability and reduce costs to
ratepayers,”
states a report prepared for the CEC in 2014 by international
certification
body and classification society DNV KEMA Energy & Sustainability (now
known
as DNV GL).
Piezoelectric technology has been used for years in electric guitars
and
sonar. The crystals are “in effect the reverse of sonar: a vibration
comes
in and an electric pulse comes out,” according to the press release.
This
video provides an animated illustration of how they could generate
electricity on roadways.
After California Gov. Brown vetoed an assembly bill Gatto introduced in
2011
that would have launched two piezoelectric pilot programs in
California,
Gatto asked the CEC to study the technology. Five years later, the CEC
has
agreed to fund pilot projects around the state.
If they are successful, perhaps other states will consider harvesting
electricity from their busy roadways.
“Thirty years ago, no one would have believed that black silicon panels
in
the desert could generate ‘solar‘ power,” Gatto stated. “Piezoelectric
technology is real and I am glad the state has finally acknowledged its
potential in becoming an energy source.”
[© awaken.com]
...
http://www.ecowatch.com/california-freeways-generate-electricity-piezoelectric-crystals-1967109463.html
California Freeways Will Soon Generate Electricity
Aug 10, 2016
For EVLN EV-newswire posts use:
http://evdl.org/evln/
{brucedp.0catch.com}
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