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ll 4 <br /> Vapor Extraction System Sample Calculations <br /> {. Moore Petroleum,Inc, 14800 W Frontage Road,Manteca,CA <br /> Effluent flow rate calCulations <br /> To calculate the stack flow rate of the RSI vapor extraction system, the manufacturer supplies the <br /> followmg equataon <br /> exhaust flow rate = RPM - c i d • e <br /> 2 revolutions • 1728 inches 3 <br /> ft 3 <br /> where, <br /> RPM = engine operating revolutions per minute, 2400 RPM on 8-21-95 <br /> cid = engine displacement, 140 m3 <br /> e = efficiency factor, 0 75 (per manufacturers gmdelmes) <br /> Using this information, the stack flow rate on August 21, 1995 is <br /> exhaust flow rate = 2,400 RPM 140 c r d 0 75 = 73 SCFM <br /> 2 revolutions • 1728 inches <br /> ft 3 <br /> C� <br /> i <br />