MM, I think they are only used in buses or trucks for HEV applications due to their output. These are either 30 or 60 kW turbines. They can be grouped in sets of up to 100 units working together for non-HEV applications. That was why I made the comment about downsizing. Currently, they are too large for what I would want for a single home or a small vehicle. But, the technology looks 'perfect,' if they could be downsized.
Poke around the site at www.microturbine.com They have some white papers that deal with emissions, etc. They might have what you are looking for concerning efficiency, which I think is a good point relative to the fuel cells, and one I hadn't thought of. If I am reading the chart properly, electrical efficiency is between 25% and 30% for the 30kW turbine, depending on fuel. Efficiency would go up if the exhaust heat is used in a cogen for stationary applications, but I don't see any figures for that. Derek > Does anyone know the upper limits of energy efficiency on these turbines? I > know with a conventional ICE engine, a major reason for looking to fuel cells > as > alternatives is that ICE engines are permanently limited by Carnot Cycle > inefficiencies. Even though many fuel cells are not yet above 40-50% > efficiency, their theoretical efficiencies are much higher than ICE engines. > Is > this also true of Microturbines? > > The HEV success stories on the page you link all appear to be very large > vehicles (busses). I wonder if there's a reason. > > MM ------------------------ Yahoo! Groups Sponsor ---------------------~--> Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark Printer at MyInks.com. Free s/h on orders $50 or more to the US & Canada. http://www.c1tracking.com/l.asp?cid=5511 http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/index.php?list=biofuel Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
