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Steam & Condensate Equations

Steam consumption and condensate generation when heating liquid or gas flows

Some common steam and condensate equations:

Steam Heating

ms = h / 960                          (1)

where

ms = steam mass flow rate (lbs/hr)

h = heat flow rate (Btu/hr)

Steam Heating Liquid Flow

ms = ql 500 SGl Cpl dtl / Ls                         (2)

where

ms = steam mass flow rate (lbs/hr)

ql= volume flow liquid (gallons per minute, gpm)

Cpl= specific heat capacity of liquid (Btu/lb oF)

SGl= specific gravity of fluid

dtl= temperature difference liquid (oF)

Ls= latent heat steam (Btu/lb)

Steam Heating Air or Gas Flow

ms = qg 60 ρg Cpg dtg / Ls                          (3)

where

ms = steam mass flow rate (lbs./hr.)

qg = volume flow gas (cubic feet per minute, cfm)

ρg = density of the gas (lb/ft3)

Cpg = specific gravity of the gas

dtg = temperature difference gas (oF)

Ls = latent heat steam (Btu/lb)

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Citation

• The Engineering ToolBox (2005). Steam & Condensate Equations. [online] Available at: https://www.engineeringtoolbox.com/steam-condensate-heating-d_889.html [Accessed Day Month Year].

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7.25.9

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