Cooling Deluge Nozzles
Process cooling for food, chemical, and industrial processes
Cooling a solid object quickly is typically accomplished by deluging it with a coolant, most often water. The rate at which the object can be cooled with a water deluge depends on the shape of the object, initial temperature, final desired temperature, the heat capacity of the object, and the convection coefficient between the object and the water. Shape takes into account the surface area, volume, and indirectly the thermal conductivity of the object. It is also important to take into account that the object's ability to transfer heat may not be uniform, as it may be made of several substances.
The basic idea is to distribute a high volume of water completely over the object, allowing the greatest contact and therefore heat transfer from the object to the water. Nozzle spray is advantageous because it can provide full coverage of virtually any object shape. Cooling takes time; the major advantage of spraying the coolant is the ability to speed up the process as compared to simple submersion. As the object cools down, the water in contact heats up. In order to continue cooling, the warmed water should be flushed away to make space for more cool water. This flushing action is an inherent characteristic of the flood of liquid produced by a nozzle.
The rate of heat transfer is usually complicated both theoretically and computationally, involving difficult calculations. BETE can help your company determine which nozzles will be most effective at deluge cooling for your process.
Selecting a Cooling Deluge Nozzle:
The nozzles listed below have a Full Cone spray and a wide range of spray angles. Full cone designs are ideal for a cooling deluge because they provide the most uniform coverage over a given area. These nozzles also have a wide range of spray angles to allow flexibility in laying out the cooling system. In situations where significant heat is present, 316 Stainless Steel is often prefered.
BETE's clog-resistant MaxiPass has the largest free passage available, making it resistant to clogging and applicable when recycling the cooling water. The MaxiPass' unique design makes it very efficient and reliable, even in harsh conditions. If temperatures are relatively low and free passage is not a concern, plastic NC nozzles are very reliable and come in a wide range of flow rates, including very high flow. WL nozzles offer uniform coverage at lower flows than the MaxiPass or NC. Standard manufacturing materials for the MaxiPass and WL are Brass, Stainless Steel, PVC, polypropylene, and PTFE. Standard materials for the NC are PVC, polypropylene, and PTFE.
Our experienced engineers can determine which nozzle is best for your application.
Typical operating conditions for this application are listed for each nozzle