Steam & Condensate Equations
Steam consumption and condensate generation when heating liquid or gas flows
Some common steam and condensate equations:
Steam Heating
m_{s} = h / 960 (1)
where
m_{s} = steam mass flow rate (lbs/hr)
h = heat flow rate (Btu/hr)
Steam Heating Liquid Flow
m_{s} = q_{l} 500 SG_{l} C_{pl} dt_{l} / L_{s} (2)
where
m_{s} = steam mass flow rate (lbs/hr)
q_{l}= volume flow liquid (gallons per minute, gpm)
C_{pl}= specific heat capacity of liquid (Btu/lb ^{o}F)
SG_{l}= specific gravity of fluid
dt_{l}= temperature difference liquid (^{o}F)
L_{s}= latent heat steam (Btu/lb)
Steam Heating Air or Gas Flow
m_{s} = q_{g} 60 ρ_{g} C_{pg} dt_{g} / L_{s} (3)
where
m_{s} = steam mass flow rate (lbs./hr.)
q_{g} = volume flow gas (cubic feet per minute, cfm)
ρ_{g} = density of the gas (lb/ft^{3})
C_{pg} = specific gravity of the gas
dt_{g} = temperature difference gas (^{o}F)
L_{s} = latent heat steam (Btu/lb)
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