What do we call the water flowing out of the demineralizer to the condensate system?

The term used to describe the water flowing out of the demineralizer to the condensate system is makeup feedwater. This water has had impurities and minerals removed through the demineralization process, making it suitable for use in the condensate system.

Makeup feedwater is essential for replenishing the water that is lost due to evaporation and other operational processes within the steam and condensate systems. By ensuring that the water entering the system is free from contaminants, the integrity and efficiency of steam generation can be maintained, which is critical for the overall performance of the machinery and boiler systems on the vessel.

The other terms do not accurately reflect this water's specific role or source. Return water typically refers to water returning from a system after it has been utilized, while processed water can be too generic and does not specifically highlight its demineralized nature. Clear water, although implying purity, does not convey the specific treatment and purpose that makeup feedwater does. Thus, makeup feedwater is the most precise designation for the treated water utilized in the condensate system after demineralization.