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25486Re: Fw: [environment] researchers develop cheap fuel cell design

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  • skorpela
    Nov 19, 2002
      These fuel cells are not for automotive applications. They will
      increase the efficiency of power production, it appear about 10
      percent. They still use hydrocarbon fuels.

      http://www.fe.doe.gov/coal_power/fuelcells/fuelcells_sofc.shtml

      This stuff is much more significant than what Dale posted on zero
      point energy power system with 449 patents, or some such. What does
      this have to do with Mike Ruppert. Is there some consipracy here?
      Will he investigate every conspiracy on the planet? He is a busy man
      and draws good speaker fees, I am sure. I was a bit distressed that
      he took up the oil issue, as this issue does not need be mixed up
      with all the other conspiracy theories, including Wellstone's death.

      best, Seppo Korpela
      40 N 83 W




      -- In energyresources@y..., "Peter Hill" <hillpa@o...> wrote:
      > Interesting news.
      >
      > Is the reduction of the exothermic gas stream temperature from 1000
      degC to
      > 800 degC commensurate with increased electrochemical conversion
      efficiency?
      > What is the laboratory test thermoelectric efficiency of these
      cells?
      >
      > Note that such exit gas temperatures allows for electrical co-
      generation by
      > steam boiler and turbine at lower efficiencies than those obtained
      from
      > steam or gas turbine systems, but when added to the fuel cell
      conversion
      > could provide much higher efficiencies of conversion of the gas
      chemical
      > energy to electricity.
      >
      > Important comment is that such "duplex" electricity generation
      systems would
      > be, by their physical nature and scale, unsuited to small scale
      automotive
      > traction. Yet the private car market is the prime driver for
      > commercialising hydrogen fuel cell systems. Yet again this is
      evidence that
      > development of "purely" electic vehicles should not be ignored in
      favour of
      > the "hot item" hydrogen fuelled cars.
      >
      > Peter Hill
      >
      > ***************************************************
      > ----- Original Message -----
      > From: "Mike Morin" <mikemorin@e...>
      > To: "Energy Resources" <energyresources@y...>
      > Sent: Wednesday, November 20, 2002 11:12 AM
      > Subject: [energyresources] Fw: [environment] researchers develop
      cheap fuel
      > cell design
      >
      >
      > > What do the scientists in this discussion group think of the
      following:
      > >
      > > -
      > > Fuel Cell Provides Cheap, Clean Energy
      > > BERKELEY, California, November 18, 2002 (Economics) -
      > >
      > > Researchers at the Lawrence Berkeley National Laboratory (LBNL)
      have
      > developed a solid oxide fuel cell that they say can generate
      electricity as
      > cheaply as the most efficient gas turbine.
      > >
      > > Their innovation, which paves the way for pollution free power
      generators
      > that serve neighborhoods and industrial sites, lies in replacing
      ceramic
      > electrodes with stainless steel supported electrodes that are
      stronger,
      > easier to manufacture, and cheaper. This latter advantage marks a
      turning
      > point in the push to develop commercial fuel cells.
      > >
      > > "We're closer to breaking the cost barrier than ever before,"
      said Steve
      > Visco, who developed the solid oxide fuel cell (SOFC) technology
      with fellow
      > Materials Sciences Division researchers Craig Jacobson and Lutgard
      De
      > Jonghe.
      > >
      > > The cost barrier is $400 per kilowatt, a bar set by the
      Department of
      > Energy's Solid State Energy Conversion Alliance, a government,
      industry, and
      > scientific group tasked with developing affordable fuel cell based
      power
      > generators. The $400 target - about one-tenth the cost of today's
      fuel
      > cells - is equivalent to the most efficient gas turbines and diesel
      > generators, and is based on the premise that a fuel cell's success
      hinges on
      > its competitiveness.
      > >
      > > "Green is great for marketing, but people won't buy an
      environmentally
      > friendly product if it's twice as expensive," Visco said.
      > >
      > > Fuel cells work by converting chemical energy to electrical
      energy,
      > capitalizing on hydrogen and oxygen's tendency to bond and form
      water.
      > Unlike gas turbines, this process does not emit air pollutants such
      as
      > nitrous oxide and sulfur dioxide.
      > >
      > > Because fuel cells are more efficient than gas turbines, they
      emit far
      > less carbon dioxide, a greenhouse gas.
      > >
      > > Visco and colleagues' foray into affordable fuel cell design
      began several
      > years ago when they developed a way to lower a fuel cell's operating
      > temperature to 800 degrees Celsius without sacrificing efficiency.
      Until
      > then, fuel cells worked best at 1,000 degrees Celsius, a high
      temperature
      > that decreases the cell's life span and precludes the use of metal
      > components.
      > >
      > > They fabricated thin ceramic electrodes that conduct ions at 800
      degrees
      > Celsius as well as thicker electrodes do at 1,000 degrees Celsius.
      Lowering
      > the temperature also allowed them to use metal components, instead
      of
      > ceramic, to connect several ceramic cells into a stack.
      > >
      > > Their design did not hit the $400 per kilowatt target, but it
      allowed them
      > to reduce the cell's operating temperature without sacrificing
      performance.
      > >
      > > Since then, they have developed a fuel cell that features 10 to
      15 microns
      > of a zirconia based electrolyte layered onto 10 to 20 microns of a
      nickel
      > based electrode. These are supported by and bonded to about two
      millimeters
      > of porous high strength commercial alloy.
      > >
      > > "The low cost of a metal based SOFC's raw materials, and its
      design
      > flexibility, should allow a stack to be manufactured below the $130
      fuel
      > cell target," Visco said.
      > >
      > > To meet the $400 generator target, the Berkeley Lab fuel cell
      must now be
      > developed into other stack designs, and paired with a low cost
      inverter and
      > other supporting technology.
      > >
      > > "Instead of building a large, fuel cell based power plant, which
      is
      > expensive and therefore risky, it makes sense to start smaller,"
      Visco
      > concluded. "The big question is not if fuel cells will enter the
      market, but
      > when."
      > >
      > >
      > > -- Coalition for Peace and Justice and the UNPLUG Salem Campaign;
      321 Barr
      > Ave., Linwood, NJ 08221; 609-601-8583 or 609-601-8537; ncohen12@c...
      > >
      > > UNPLUG SALEM WEBSITE: http://www.://www.unplugsalem.org/
      > > COALITION FOR PEACE AND JUSTICE WEBSITE:
      > thtp://www.://www.coalitionforpeaceandjustice.org
      > > The Coalition for Peace and Justice is a chapter of Peace
      Action. "First
      > they ignore you; Then they laugh at you; Then they fight you; Then
      you win.
      > (Gandhi) "Why walk when you can fly?" (Mary Chapin Carpenter)
      > >
      > >
      > > Your message didn't show up on the list? Complaints or
      compliments?
      > > Drop me (Tom Robertson) a note at t1r@b...
      > >
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      > >
      > >
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