Which type of boiler has the largest capacity of energy?

The correct answer is that a water tube boiler typically has the largest capacity for energy due to its design and operational characteristics. In water tube boilers, water circulates in tubes that are heated externally by fire or hot gases. This arrangement allows for efficient heat transfer and can generate steam at higher pressures and temperatures.

Water tube boilers can produce a significant amount of steam because they have a greater surface area for heat transfer and can accommodate larger capacities more easily than fire tube boilers. Fire tube boilers, on the other hand, have hot gases passing through tubes that are surrounded by water, which limits the pressure and steam output capacity.

This makes water tube boilers particularly suitable for larger industrial applications where high steam output is essential. By being able to handle higher pressures and larger volumes of water, water tube boilers stand out as the preferred choice for many high-capacity energy needs.