Free air enters a compressor at atmospheric conditions 20 o C and 70% humidity ratio . The air leaves saturated at gauge pressure 8 bar and 40 o C .
Based on the diagram and table above the water content in saturated air entering the compressor can be estimated to be approximately 1.8 10 -2 kg per m 3 free air (0.018 kg water /m 3 air ) .
The amount of water with 70% saturation can be calculated as
( 0.018 kg water /m 3 air ) (70%) / (100%)
= 0.0126 (kg water /m 3 air )
The water content in the 100% saturated air leaving the compressor can be estimated from above to be approximately 0.62 10 -2 kg per m 3 free air (0.0062 kg water /m 3 air ) .
The water extracted in the compressor can be calculated as
( 0.0126 kg water /m 3 air ) - ( 0.0062 kg water /m 3 air )
= 0.0064 ( kg water /m 3 air )
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