What does "makeup water" refer to in a boiler system?

Makeup water refers specifically to the water that is added to a boiler system to replace water that has been lost due to steam production or through processes like blowdown, where some water is intentionally removed to control impurities within the system. This is a crucial aspect of boiler operation; if the levels of water in the boiler are not maintained, it can lead to several issues, including overheating, boiler damage, and inefficient operation.

In typical boiler operations, as steam is generated, water is converted to steam and leaves the system. Additionally, blowdown is used to remove sludge and prevent scale buildup, which also results in water loss. Thus, to ensure a consistent level of water and maintain proper functionality, makeup water is necessary for replenishment. The management of makeup water is critical for safe and efficient boiler operation.