Heating Water by Injection Steam

Water can be heated by injecting steam

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

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

m_s = q / (h_g - (t c_p))         (1)

where

m_s = steam flow rate (kg)

q = heat transfer rate (kW)

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

t = final temperature of the water (^oC) 

c_p = specific heat capacity of water (kJ/kg)

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