# Steam & Condensate Equations

## Steam consumption and condensate generation formulas heating liquids or gas flows

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Some common steam and condensate equations can be expressed as

### 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 the liquid (Btu/lb.^{o}F)

SG_{l}= specific gravity of the 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}60ρ_{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= density of the gas (lb/ft_{g}^{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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