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l INDUSTRIES, INC. <br /> CALCULATIONS FOR DIRECT FIRED OXIDIZER MANUFACTO ED BY <br /> STEALTH INDUSTRIES INCORPORATED <br /> THE 250 CFM DIRECT <br /> FIRED THERMAL OXIDIZER <br /> 1. TOTAL MASS FLOW RATE OF CONTAhfMATED AIR <br /> (250 CFM) (60 MINUTES) = 1S, 000 SCFH <br /> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - = 1, 145 LB/HR <br /> 33 . 1 CUBIC FEET OF AIR PER POUND <br /> 2 . TOTAL HEAT REQi7IRM TO RAISE AIR TEMPERATURE <br /> ENTHALPY OF GAS AT 1400 DEGREES 341 . 5 BTU/LB <br /> ENTHALPY OF GAS AT 70 DEGREES - 9 . 0 BTU/LB <br /> TOTAL BTU PER LB TO RAISE AIR TEMP. = 332 . 5 BTU/LB <br /> TOTAL BTU REQUIRED TO RAISE TEi�. = 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 VOLUIM OF NATURAL GAS FOR OXIDIZER <br /> TOTAL HEAT REQUIREMENT = 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. VOLUIMM 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 f 460) = 1, 872, 000 <br /> 3530 E. Enterprise Drive, Anaheim, CA 92807-1628 <br /> tel: (774) 632-1112 or (800) 632-1112 fax (714) 632-1177 <br />