Steam Condensate Recovery System

The steam condensate recovery system is a crucial component of a ship’s steam system that significantly improves overall energy efficiency.

Condensate, or condensed steam, can be reused in many different ways, for example:

• As heated feed water, by returning hot condensate back to the boiler’s deaerator
• As pre-heat source, for any applicable heating system
• As steam, by reusing flash steam generated in a flash tank
• As hot water, for cleaning equipment or other cleaning applications

The primary purpose of a Steam Condensate Recovery System is described on the first bullet point above: to collect, treat, and return the condensate back to the boiler, reducing fuel consumption and water treatment costs.

Broadly speaking, the following advantages can be obtained:

• Heat recovery: Condensate retains a significant amount of thermal energy. By returning it to the boiler, less energy is required to heat the water back to steam temperature.
• Reduced fuel consumption: The recovered heat energy means less fuel is needed to produce steam, leading to substantial fuel savings.
• Reduced air emissions: Besides impacting fuel consumption, reducing boiler fuel needs through condensate recovery leads to less air pollution by lowering CO₂, NO_x and SO_x emissions.
• Water conservation: Reusing condensate reduces the need for fresh water makeup, which is particularly important for ships with limited water production capacity.
• Reduced chemical treatment: Condensate is already treated and contains fewer impurities than raw water, reducing the need for chemical treatment in the boiler.
• Extended equipment life: By using preheated and pre-treated water, there’s less thermal stress on the boiler and reduced scale formation, leading to longer equipment lifespan.
• Improved cycle efficiency: The overall steam cycle efficiency is increased, as less energy is wasted in the form of hot condensate being dumped overboard.