RE: GAS-L: rated power

["Schmidt, Darren" <dschmidt@undeerc.org> (by way of Tom Miles <tmiles@trmiles.com>)]

-----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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