RE: GAS-L: rated power - Dual Fuel Diesel

[Tom Miles <tmiles@trmiles.com>]

Darren,

It seems like using wood gas to substitute 70% of the diesel in a  "dual 
fuel" mode is a practical solution. Do you derate the engine in that case?

Regards,

Tom

At 08:03 AM 10/22/01 -0700, Schmidt, Darren wrote:
>-----Original Message-----
>From: "Schmidt, Darren" <dschmidt@undeerc.org>
>To: gasification@crest.org
>Subject: RE: GAS-L: rated power
>Date: Mon, 22 Oct 2001 09:41:42 -0500
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>
>Camp Lejeune, NC - A 1MWe Waukesha L7042 was operated on 150 Btu/scf wood
>gas.  After researching the serial number on the block, we determined our
>engine was originally a naturally aspirated engine retrofitted with a rotex
>turbo-charger.  Since the engine was used and older all we had to go by was
>the specifications for the L7042 turbo-charged engine.  We never baselined
>the engine on natural gas, but we did baseline it on propane.
>With that said here were the numbers:
>Fuel: natural gas, Rating: 1MWe, Output on producer gas: 350 kW, derate: 65%
>
>Fuel: propane, Rating: 650 kW, Derating: 46%
>
>I have also seen numerous examples of gasoline engines having deratings of
>up to 50% when fired on wood gas.
>
>Derating is dependant on compression ratio.  At Camp Lejeune, we could not
>get the turbo chargers to perform properly with wood gas.  If we could of
>achieved higher boost, we would have had much better results.  Theoretically
>the derating is calculated at 20-25% based on the difference in heating
>value.  You can expect to be somewhere between 25% and 50% derating.
>
>-----Original Message-----
>From: shuster [mailto:shuster@zol.co.zw]
>Sent: Monday, October 22, 2001 1:05 AM
>To: gasification forum
>Subject: GAS-L: rated power
>
>
>PLEASE COULD A FEW PEOPLE WHO ACTUALLY OPERATE  WOOD GASIFIERS TO FUEL SPARK
>AND COMPESSION IGNITION ENGINES STATE WHAT % HP THEY OBTAIN FROM THEIR
>ENGINES COMPARED TO MANUFACTURERS SPECS WHEN RUNNING ON THE ORIGINAL FUEL.
>I.E.
>BY HOW MUCH IS A ENGINE DERATED. IS THE DERATING DEPENDENT ON THE
>COMPRESSION RATIO OF THE ENGINE.
>I AM DESPERATE FOR A THERMOCOUPLE (1200 C) TO DETERMINE TEMPS IN OUR
>GASIFIERS AND SIMPLY GAS ANALYSER (DIY ; EXHAUST GAS; TUNE UP TYPE) TO
>MEASURE ROUGHLY CO CO2 AND
>O2.
>WE NEED A STRAIGHT DONATION IM AFRAID. FOREX IS SO SCARCE AND EXSORBITANT.
>
>MANY THANKS
>ASHLEY
>
>
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Thomas R Miles          tmiles@trmiles.com
T R Miles, TCI                  Tel 503-292-0107
1470 SW Woodward Way    Fax 503-292-2919
Portland, OR 97225 USA


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