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KW Calculations for Process Heaters:
(See tables below for properties of commonly heated mediums)

*Important Note: This calculation is provided for reference purposes only, and must not be used for any other purpose. Contact a qualified factory representative for final sizing before specifying, ordering, or using any process heater.


KW required to heat gases, liquids, or solids:
(includes 25% safety factor)
Specific
Heat
Lbs/Gal. (Liquid)
or lbs/cu.ft. (Gas)
Total Volume
per Hour
Temperature
Rise (°F)
 x   x   x 

  =   
3412 (BTU's in 1 kWH )
 

KW Required to Heat Air Only
(includes 25% safety factor)
 
Volume (SCFM) Temperature Rise (°F)
 x 

  =   
3000
Liquids
Gases and Vapors
SUBSTANCE
Sp. Heat Wt. in lbs. per gallon   SUBSTANCE
Specific Heat
Weight in lbs per cubic foot at approx. 70° F.
Acetic Acid .49 8.75   Acetylene .35 .068
Alcohol .65 6.58   Air .237 .080
Benzine .45 7.34   Alcohol .453 ........
Ether .503 6.14   Ammonia .520 .048
Glycerine .58 10.43   Argon .124 .1033
Mercury .0333 112.97   Carbon Dioxide .203 .1144
Oil, Cottonseed .47 7.92   Carbon Monoxide .243 .0725
Oil, Olive .471 7.67   Chlorine .125 .1853
Paraffin, Melted .71 7.49   Ethylene .37 .078
Petroleum .51 7.26   Helium 1.25 .0103
Sulphur, melted .234 15.01   Hydrochloric Acid .189 .095
Turpentine .42 7.21   Hydrogen 3.41 .0056
Water 1.0 8.34   Methane .536 .0446
        Methyl Chloride .197 .142
        Nitric Oxide .237 .0777
        Nitrogen .249 .073
        Oxygen .219 .083
        Sulphur Dioxide .149 .166



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