Video Blog: Measuring Surface Temperature and Air Temperature Requires Different Tools

IR Temperature Guns are a great tool for measuring surface temperatures, but not the best solution for providing the air temperature data EXAIR needs to size a Cabinet Cooler system for your electronic cabinets. This brief video illustrates the differences between using an IR temp gun and a regular thermometer when gathering temperatures to determine Cabinet Cooler system specifications.

Make sure to print out the Cabinet Cooler Sizing Guide before you get started so you can easily fill in all the needed data.

Brian Farno
Application Engineer
BrianFarno@EXAIR.com
@EXAIR_BF

You Have Too Much Water in Your Compressed Air

I have been working with a couple of overseas distributors lately who have projects involving vortex tubes that are tasked with cooling a chamber down to temperatures in the -10 to -20°C range. One of the projects was having some difficulty though. It seemed that in the beginning of the day, the vortex tube would function perfectly, but as the day wore on, the vortex tube would “stop working” as the customer would say.

Vortex tube

We went back and forth a few times and I finally determined that the customer’s compressed air supply had a dew point that was higher than the -20°C output flow they were achieving in the beginning of the day. The mechanics of what was happening is that the vortex tube would cool an initial volume of compressed air and the moisture was condensing out of the airflow and lying inside the vortex tube body. When the subsequent “on” cycles would occur, that left over water would freeze up inside the vortex tube generator, eventually plugging it up.

And so the cycle after that point was reached would be one of freeze, plug up, thaw and freeze again. Not a very reliable way to go about the application. And so, in order for the customer to have a more reliable process, they had to dry their compressed air with a refrigerant type air dryer to drop that dew point before the compressed air entered the vortex tube. Once they did that, no more troubles.

Neal Raker, Application Engineer
nealraker@exair.com