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t <br />INDUSTRIES, INC. <br />• <br />AM <br />CALCULATIONS FOR DIRECT FIRED OXIDIZER MANUFACTURED BY <br />STEALTH INDUSTRIES INCORPORATED <br />THE 250 CFM DIRECT <br />FIRED THERMAL OXIDIZER <br />I. TOTAL MASS FLOW RATE OF CONTAMINATED AIR <br />(250 CFM) (60 I-jIm IES) = 15, 000 SCFH <br />---------------------------------- = 1,145 LB/HR <br />13.1 CUBIC FEET OF AIR PER POUND <br />2. TOTAL HEAT REQUIREKENT 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 TEMP = 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 VOLMIE 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. VOLUME RATE OF COMBUSTION AT 1400 DEGREES <br />(628 SCFH) (11.45) (1,400 + 460) = 13, 374, 51.6 <br />--------------------------------------- - 7.14 CF/SEC <br />(3600) (60 + 460) = 1,872,000 <br />3530 E. Enterprise Drive, Anaheim, CA 92807-1628 <br />tel: (714) 632-1112 or (800) 632-1112 - fax (714) 632-1177 <br />