Compared to adjustable nozzles, smooth bore nozzles absorb what?

Smooth bore nozzles are designed to produce a straight, solid stream of water, which allows for greater reach and improved penetration into the fire. One of the key aspects of their function is that they do not create turbulence, which can often lead to unnecessary heat absorption by the water.

When water flows through a smooth bore nozzle, it encounters minimal friction and turbulence, resulting in a lower temperature increase of the water as it exits the nozzle. This means that less of the heat from the fire is absorbed by the water before it exits and is applied to extinguish the fire. This characteristic is particularly important in firefighting, as it allows firefighters to deliver water effectively while maintaining the thermal energy of the water, maximizing its cooling effect upon reaching the fire.

In contrast, adjustable nozzles often create more turbulence, which can lead to increased heat absorption by the water. Therefore, smooth bore nozzles are distinguished by their ability to absorb less heat compared to adjustable nozzles.