Using combustion, the heating provided by the burner, and thermal absorption surfaces, hot water boiler supplies the heat required in industries, buildings, and pools.
Steel hot water boilers are classified in fire-tube and water-tube groups irrespective of their capacity, size, or operating pressure.
Considering the key role of heat exchange surfaces in boilers, some manufacturers also utilize the end surface of a boiler to circulate water and exchange heat. Such boilers are known as the wet back type. Wet back boilers are more expensive, but in exchange, offer higher efficiency compared to the dry back types.
Lots of people use the word "boiler" for any variety of water-heating appliance. However, a boiler does not work like a water heater, and vice-versa. Confusing the two can complicate the troubleshooting process and make communication difficult between yourself and a heating expert.
The differences between steel hot water-tube and fire-tube boilers :
- In fire-tube boilers, the flame and smoke produced by combustion pass through tubes and boiler passes to transfer their heat to water. However, in water-tube boilers (e.g. the type used in power plants) the heat generated by the burners occupy the boiler, warming the water in tubes.
- Steel hot water tube boiler is built to operate under high pressures. This type of boiler is used in power plants under temperatures up to 550 and pressures above . On the other than, in fire tubes, the operating pressure does not exceed 30 bar. Fire-tube boilers feature long steel tubes that contain the hot gases produced in the combustion chamber. The water to be heated or vaporized circulates around these pipes.
- Fire-tube boilers offer high efficiency relative to their production costs and are easier to repair and maintain than their water-tube counterparts.
- A boiler heats water rapidly
- A water heater heats and stores water
- A heat-pump water heater is more efficient
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