Aftercooler Gains

[Greg Hermann]

>
>By the way, does anyone have any real AC compressor figures to examine, at a
>variety of full load shaft speeds?

Yeah, but it would prolly go over the limit for a post! Compressor HP will
vary with suction pressure, condensing temp/pressure, compressor
displacement, and compressor speed. At "normal" AC conditions, say 35
degree suction temp and 135 degree condensing temp, you can figure ROUGHLY
1 HP compressor power per 12,000 BTUH of cooling effect. With higher
suction temps, a given displacement/rpm compressor will have a higher
"capacity" and pull more HP to drive it--because the refrigerant gas will
be more dense at the higher suction temp.

There are LOTS of variables!

Perhaps the numbers for a 200 HP compressor at 0 F suction and 110 F
condensing at 1200 rpm,using NH3 refrigerant would be of interest?? :-)

That 20 HP number wasn't too unrealistic for the conditions and load mentioned!

Greg
>
>Your math is probably correct, don't rely upon mine at this point.

See my prio post about the math--it wasn't.
>
>Since you appear well adept with thermo crunching, what do you specifically
>think of the air/dynalene/freon hybrid intercooling system found at
>www.coolflow.com?  Would be very interested in hearing your thoughts.
>
>
>Thanks;
>Walt.
>
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