In a water tube boiler, where do the gases of combustion pass?

In a water tube boiler, the gases of combustion pass around the tubes that contain water. This design allows the hot gases to transfer heat to the water within the tubes efficiently. As the water absorbs the heat from the hot gases, it converts into steam, which can then be used for various applications.

The configuration of a water tube boiler is specifically aimed at achieving high efficiency and safety. It allows for a larger surface area for heat exchange and enables better circulation of water, which is essential for maintaining optimal operational pressure and temperature. The gases of combustion being directed around the tubes rather than through them is important because it ensures that there is no risk of overheating or damaging the tubes due to direct exposure to the combustion gases.

This approach contrasts with fire tube boilers, where the combustion gases flow through the tubes that are surrounded by water. Understanding the flow of combustion gases in various boiler types is crucial for ensuring their efficiency and safety in operation.