Cooling with Spray Nozzles
Spray nozzles are used to cool surfaces by spraying a cooler fluid that absorbs and removes heat. Heat energy is transferred to the coolant either by heating it in its still liquid state or by vaporizing the fluid. Water has high heat capacity (energy to change water from liquid to gas) and specific heat capacity (energy needed to warm water in its liquid stage) compared to most liquids, making it a useful coolant. However, in certain situations, water may not be suitable and other coolants need to be sprayed.
Spiral nozzles can be configured to provide wide full cone spray patterns and are excellent at distributing liquid over a large area. They also produce relatively fine drops compared to other hydraulic nozzles and are suitable for many cooling applications.
For evaporative cooling applications, small drops are required, so misting nozzles are a good choice.
Air Atomizing Nozzles
Air atomizing nozzles use compressed air to help break the liquid into small drops. The air also carries the spray over a larger area, making them suitable for many cooling applications.