What is a relation between BAR & CFM in Air compressor?

Question

Pressure is calulated in BAR & capacity is calculated in CFM

Answer 1

CFM = Piston displacement x (1+m-m(pd/ps)exp1/n)

m= percent head clearance expressed as a decimel
pd = discharge pressure = psia x .069 = BAR
ps = suction pressure = psia x .069 = BAR

n=1.2 to 1.35

Answer 2

Cfm To Bar

Answer 3

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it's all about benouli CFM is not VOLUME it is FLOW PSI is not pressure it is resistance to FLOW. if you have a compressor with an open pipe and no reservoir it is producing the cubic foot per minute flow out of the open pipe. this has VELOCITY which is why when you let go of the pipe it SNAKES over the floor. Reduce the hole NOZZLE size and the pipe starts to expand as BACK PRESSURE forms in the pipe, the pressure therefore increases BUT the FLOW decreases so less air is moved through the nozzle but the VELOCITY of the air out of the nozzle increases. Right now if you want to use an air compressor to blast paint you need a venturi where the soda is drawn into the air flow by creating low PRESSURE in the venturi This isdone by INJECTING the air flow through a small NOZZLE into a larger tube, this FAST MOVING air creates a VACUUM behind it drawing the soda with it. SO for a grit or soda blaster you need HIGH CFM to create the FLOW and a small NOZZLE to create HIGH SPEED air in the venturi. benouli's law :o)

Answer 4

Normal CFM or Standard CFM remains same however with increase in pressure the density increases and the actual CFM decreases

Answer 5

See whether you can fit on all the values in the PV=mRT equation with p being in Bar, V being the CFM, m, R( Gas constant), Temp. , m being the air mass derived wtih density inputs( all STP conditions )from the table.