Which classification is used for auxiliary boilers?

Auxiliary boilers are typically classified based on their design and operational characteristics. The classification of water-tube forced circulation is appropriate for auxiliary boilers due to the way that these systems operate to efficiently manage high steam pressure and heat transfer.

In water-tube boilers, water flows through tubes that are exposed to heat from the combustion of fuel. This design allows for better efficiency and faster steam generation compared to other boiler types. The forced circulation within these boilers helps maintain the required flow of water through the system, ensuring that the heat is effectively exchanged. This is especially crucial in auxiliary applications where the demand for steam may need to be rapidly adjusted based on varying operational needs.

In contrast, fire-tube boilers (another common boiler type) have hot gases running through tubes that are surrounded by water. This design can be less efficient for auxiliary applications where faster response to changes in steam demand is necessary. Other classifications like heat exchangers and natural circulation do not accurately reflect the structure and operation specific to auxiliary boilers in marine applications.