ARCHIVED REPORTS XR0006540 - Laserfiche WebLink

Home Browse Search

i FLOW RATES Flow rates are measured at the site by use of orifice plates . A one inch orifice is placed in line for each well and a three inch orifice is used to measure the total flow. An orifice plate restricts the flow of air across it This restriction causes a pressure drop across the orifice By measuring the resulting pressure change across the orifice it is possible to calculate the air flow rate The flow rate is calculated by the pressure drop (millimeters (mm) water) across a square edge orifice plate Ve = CK sqr (P) Q = AVe Where : Ve= velocity in feet per minute (fpm) C = Orifice Coefficient = 0 65 (for orifice used) K = Constant = 794 6 mm water P = Pressure differential across the orifice Q = Flow rate in cubic feet per minute (CFM) A = Area orifice in square feet . 1" = 0 00545 ft2 3 " = 0 04909 ft2 Q = A X 0 65 X 794 6 X sqr (P) CO2 EMISSIONS Analysis of the vapor stream has revealed that a mayor constituent of the extracted vapor is carbon dioxide (CO2) . The CO2 is found in concentrations well above its normal concentration in air and therefore is probably the product of the oxidation of hydrocarbons by biological and/or chemical means . Because of the high concentrations of CO2 found in the influent (2- 50) , this CO2 represents a significant amount of hydrocarbon removed. On average in a hydrocarbon molecule there are 2 Hydrogens (H) for every Carbon (C) therefore each CO2 represents the oxidation of one CH2 radical This indicates that for ever mole of CO2 recovered one mole of CH2 has been destroyed The molecular weight of CH2 is 14 gm/mole 14gm/435 . 6gm/lb= 0 . 032 lb/mole The volume of one mole of gas at STP = 22 4 1 1 1 = 0353 cf 22 41 x 0353 cf/l = 0 79cf/mol Therefore one cf of pure CO2 represents 0 032 lb/mole / 0 79 cf/mole = . 041 Ib/cf of CH2 In gasses 116 = 1/100 of a mole 0411b/cf/100%= 00041 lb/cf/% page 4 of R603 , 03/01/93