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Vapor Extraction System Sample Calculations <br /> Moore Petroleum,Inc.,5491 'T"Street,Banta,CA <br /> I <br /> I <br /> Calcul tin Exhau t to k FI w R to <br /> The manufacturer of the RSI unit supplies the following information to ad in th <br /> the exhaust flow rate: ia calculation of 1 <br /> stack flaw(SCFM) = RPM • DISP(in 3) • e <br /> 3 t <br /> 2 revolutions • 1728 <br /> in <br /> ft 3 <br /> . 4 <br /> where, <br /> t <br /> RPM (REV �= engine displacement <br /> MIN <br /> DISP = engine displacement (in') = 140 in 3 <br /> ii e = efficiency factor = 0.75 (per manufacturers guidelines) <br /> This process may be applied to the data collected on September 19, 1995. On this date, the RSI <br /> unit was operating at 2,500 RPM. The resulting stack flow rate can be calculated in the following <br /> manner: } <br /> 2500 M� 140(in3) • 0.75 <br /> stack flow(SCFM) _ = 76 SCFM <br /> 2 revolutions 1728 in3 <br /> ft 3 I <br /> I <br /> Therefore, with the unit operating at 2,500 RPM;the resulting stack flow rate is 76 SUM. <br /> - I <br /> 4 <br /> { <br /> - <br /> t <br /> } <br /> �l <br /> i <br /> k <br />