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INDUSTRIES , INC. <br /> CALCULATIONS FOR DIRECT FIRED OXIDIZER MANUFACTURED BY <br /> STEALTH INDUSTRIES INCORPORATED <br /> THE 250 CFM DIRECT <br /> FIRED THERMAL OXIDIZER <br /> 1 . TOTAL MASS FLOW RATE OF CONTAMINATED AIR <br /> ( 250 CFM) ( 60 MINUTES ) = 15 , 000 SCFH <br /> - <br /> - - - - - - - - - - = 11145 LB /HR <br /> 13 . 1 CUBIC FEET OF AIR PER POUND <br /> 2 . TOTAL HEAT REQiUIREMr TO RAISE AIR TEMPERATURE <br /> ENTHALPY OF CAS AT 1400 DEGREES = 341 . 5 BTU/ L3 <br /> ENTHALPY OF GAS AT 70 DEGREES = 9 . 0 BTU/ L3 <br /> TOTAL BTU PER LB TO RAISE AIR TEMP . 332 . 5 BTU/ LB <br /> TOTAL BTU REQUIRED TO RAISE TaKMP , 380 , 712 . 50 BTU <br /> LOSS OF HEAT DUE TO CONVECTION 40 , 000 . 00 BTU <br /> TOTAL HEAT REQUIREMENT 420 , 712 BTU/HR <br /> 3 . TOTAL VOLUME OF NATURAL GAS FOR OXIDIZER <br /> TOTAL HEAT REQUIREI✓ENT 420 , 712 . 50 BTU <br /> BTU PER CUBIC FOOT OF NATURAL GAS = 670 . 00 BTU/CF <br /> TOTAL CUBIC FEET OF NATURAL GAS 627 . 90 SCFH <br /> TOTAL BTU USAGE OF OXIDIZER = 627 , 900 BTU/HR <br /> 4 . VOLUME RATE OF COMBUSTION AT 1400 DEGREES <br /> ( 628 SCFH ) ( 11 , 45 ) ( 1 , 400 + 460 ) 13 , 374 , 516 <br /> - - - - - - - = 7 . 14 CF/ SEC <br /> ( 3600 ) ( 60 + 460 ) 11872 , 000 <br /> 3530 E. Enterprise Drive, Anaheim , CA 92807- 1628 <br /> tel : (714) 632- 1112 or (800) 632- 1112 fax (714) 632- 1177 <br />