The desuperheater reducing station is used to lower the temperature of the steam destined for which system?

• A. 150 psi auxiliary steam system
• B. 600 psi main steam
• C. Condensing loop
• D. Feedwater system

Answer: (A)

Desuperheater reducing station is used to bring steam down to a temperature suitable for a lower-pressure auxiliary service. In shipboard plants, the 600 psi main steam is too hot for the auxiliary system that operates around 150 psi. The desuperheater injects water into the steam and mixes it to absorb heat, delivering steam at the required, cooler temperature to the 150 psi auxiliary steam system. It isn’t used to cool condensate in the loop or to feed the feedwater system, which operate with different objectives and fluids.