I recently had the pleasure of assisting a caller with a cooling application. We’ve written before (more than once) about cooling applications & product selection, and I had a very similar conversation with this caller. Since the need was for cooling as quickly as possible to ambient temperature, the caller was keen on talking about Vortex Tubes.
This application entails operators placing small products, by hand, under the cold air flow for rapid cooling. Now, a Vortex Tube can produce VERY low temperatures…down to -40F…so operator safety had to be addressed. By keeping the Cold Fraction (the percentage of supply air flow which is directed to the cold end) high, we can also keep the temperature high enough to not present a hazard (i.e., frostbite) but still plenty low enough for effective cooling.
Since sound level was also a concern, we discussed mufflers…with Hot and Cold Mufflers installed on a Medium Vortex Tube (models 3215, 3225, or 3230, which were what we narrowed our discussion to,) a sound level of 81-84 dBA will be produced. That’s within OSHA’s limits for 8-hour exposure, but isn’t exactly “communication-friendly” for operators that need to talk to each other on a regular basis.
The Model 3825 Adjustable Spot Cooler System incorporates the performance of the three Vortex Tube models that we were talking about into a convenient mag base mounted assembly, fitted with a cold muffler, flexible cold air hose, and additional sound level suppression to 72-74 dBA…which makes a significant difference in areas where operator conversation is critical.
The temperature control knob allowed them to dial in the optimal cold air flow, keeping the temperature low enough, and flow high enough, for rapid cooling of the parts.
If you’d like to find out just how cool an EXAIR Vortex Tube/Spot Cooling Product can make your application, give me a call.