This secondary steam is then used to power auxiliary shipboard engines driving winches or pumps, or to meet any steam requirement that does not require superheating, such as boiler feedwater and freshwater evaporators.
[2] It is constructed as a cylindrical steel pressure vessel, either horizontal or vertical, containing a series of heating coils.
The design bears a strong resemblance to a marine evaporator, though simpler, as it uses treated feedwater, rather than scale-producing raw seawater.
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