[200q20v] Re: [UrS-technical] atmosphere and compressor maps -
read'n 'riting & 'ritmatic
pjrose at frontiernet.net
Mon Mar 19 12:51:13 EST 2001
At 11:29 PM -0800 3/18/01, Feico van der Laan wrote:
>There may be a 2-4% error in this calculator. He uses
>the assumption that the standard conditions are: Air
>temp 77 deg F, 29.235 Inches Hg Barometer, 0 ft
>altitude, 0% relative humidity.
>Standard air temperature is considered 59 Degrees @
>29.235 inches Hg. If my memory serves me correctly.
That sounds like a strange "standard temperature" to a chemist's ear.
Although standard conditions in use for turbo compressor calculations
might be different, the standard temp that's defined by international
convention for gas-property calculations is 0 degrees C (32 F). Of
course, any temperature can be assumed for calculations, as long as
it's specified. And similarly, the generally accepted value for
standard pressure (1 atm) is 29.921 inches Hg. Of course, YMMV (your
manometer may vary).
BTW, that tutorial by John Lucius was great. Certainly made it to my
mailto:pjrose at frontiernet.net
More information about the 200q20v