Where is the combustion chamber located in a serpentine watertube boiler?

In a serpentine watertube boiler, the combustion chamber is typically located below the water tubes. This positioning allows the flames and hot gases produced during combustion to rise through the water tubes, enhancing the heat transfer efficiency. As the hot gases flow upward through the tubes, they heat the water inside those tubes, generating steam as a result. This design helps ensure effective heating while maintaining the necessary circulation of water and steam throughout the system.

The boilers are designed with the combustion chamber at the bottom to facilitate the upward movement of combustion gases, which is integral for maximizing heat absorption by the water in the tubes. Consequently, this arrangement not only improves thermal efficiency but also supports a natural flow of water, contributing to the overall functionality of the boiler.