What is the characteristic of a water leg in a boiler?

The water leg in a boiler is designed to serve as a space that absorbs wasted heat. It typically refers to a part of the boiler system where the temperature is lower, allowing for the absorption of heat from flue gases or other heat sources that would otherwise be lost. This helps improve overall thermal efficiency, as the heat absorbed can then be transferred back into the water, raising its temperature and contributing to the steam generation process.

Other components of the boiler system perform different functions, such as steam generation or water circulation for cooling, but the primary role of the water leg specifically focuses on reclaiming waste heat to maximize the energy efficiency of the boiler.