Heating Water by Injection of Steam
Water can be heated by injecting steam
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)