How to calculate the compression ratio
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Does outlet pressure/inlet pressure refer to gauge pressure or absolute pressure? For example, if the gauge pressures at the outlet and inlet are 0.8 MPa and 0.2 MPa respectively, should the compression ratio be 0.8/0.2 = 4, or (0.8+0.1)/(0.2+0.1) = 3? It’s a question that just occurred to me; I’m a bit confused. This post was last edited by 156026692 on 2009-1-12 at 21:33.]
Compression ratio = absolute pressure at the outlet / absolute pressure at the inlet; this is how it is calculated in the principles of chemical engineering as well as in practice.
The compression ratio is calculated using absolute pressure.
What was said upstairs is right! The compression ratio is calculated using absolute pressure! ! This post was last edited by tmg2008 on 2009-1-12 09:30]
Is it the one that requires increasing the air pressure first? Oh, I hadn’t considered that issue before. Hehe!
It is calculated using gauge pressure. Export pressure divided by import pressure.
The compression ratio uses absolute pressure; it should be the absolute pressure at the outlet divided by the absolute pressure at the inlet
Gauge pressure is used, plus one atmosphere.
Calculations are done using absolute pressure. Ordinary pressure gauges display only relative pressure, which is also known as gauge pressure; therefore, the formula for the latter should be used
What was said upstairs is right! The compression ratio is calculated using absolute pressure! !
The ratio of the absolute pressures at the inlet and outlet should be used