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Heating Water by Injection of Steam

Water can be heated by injecting steam

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For some applications a direct heating of the water by injecting steam may be convenient. A direct heating system is very simple since it don't require any heat exchangers. Fouling of surfaces, which may be a major problem in certain processes, are avoided.

The required steam flow rate in an steam injection process can be calculated as

ms = q / (hg - (t cp))                                  (1)

where

ms = steam flow rate (kg)

q = heat transfer rate (kW)

hg = specific total enthalpy of the steam before the control valve (kJ/kg)

t = final temperature of the water after the heating (oC) 

cp = specific heat water (kJ/kg)

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