<VV> Re: compressing air

JVHRoberts@aol.com JVHRoberts@aol.com
Thu, 12 Aug 2004 16:01:29 EDT

Which, of course, is an excellent case for a blow through with an 
intercooler. Cool the air FIRST, and THEN vaporize the fuel!  <G>

In a message dated 8/12/2004 12:22:11 PM Eastern Standard Time, 
FrankCB@aol.com writes:
    Quite true.  This cooling from the evaporation of fuel depends, of 
course, on the A/F ratio.  For a 12 to 1 ratio (rich for high load) it's 
around 50 
deg. F cooling of the air/fuel stream.
    Frank Burkhard

In a message dated 7/29/04 4:47:38 PM Eastern Daylight Time, 
JVHRoberts@aol.com writes:
You forgot to take into account the cooling effect from the vaporizing fuel.

In a message dated 7/29/2004 4:29:50 PM Eastern Standard Time, 
djtcz@comcast.net writes:
> I had less than 180 deg out of turbo before intercooler at 17 psi with a 
TE60 on a nonvair motor.
Was the 180 degree temp F of C?  Was it temperature rise (natural with 
compression) or the actual discharge temp?
There is a chart in  Hugh MacInnes "Turbochargers" book that plots compressor 
discharge temperature VS pressure ratio for compressor efficiencies from 56% 
to 80% when starting with 90 degree F air.
I'd say 17 psi boost is a pressure ratio of  2.15.  With a very efficient 
well matched  80% efficient compressor it shows almost 260 F, which is a 170 
temperature increase from 90 F.