Air stratification is an aspect not to be underestimated inside electrical panels and in this article we will introduce the phenomenon and we will give you precise technical indications on how to face the problem.
As also happens in our homes, even inside the electrical cabinet, due to the dilatation principle, the hot air produced by the operation of the devices contained in it, tends to rise in the upper part, while the fresher air settles in the lower area. However, as you will see, it’s wrong to consider only two layers of air, as if they were separated in a net halfway up the height of the electrical cabinet. It’s more correct to think about multiple different layers, given by intermediate temperatures between the two.
On what the stratification of the air inside the electrical panel depends
The air stratification inside the electrical cabinet is directly connected to the variations of the dry bulb temperature and relative humidity, terms that we have already encountered talking about the thermal dissipation of the electrical enclosures.
When it comes to designing heating and cooling systems for electrical cabinets, the goal is to maintain the dry bulb temperature and relative humidity within certain values, to avoid overtemperature and condensation, with consequent risks of malfunctions, short circuits. or, in long time, oxidation and corrosion of the components of the electrical panel.
Would you like to know more? Read our #whitepaper on air stratification in an electrical cabinet.
The attached White Paper will give you precise information on the concept of air stratification and explain how it relates to changes in the dry bulb temperature and relative humidity inside the electrical cabinet in the vertical direction, using a practical example of heating tests carried out on a electrical cabinet in laboratory. In addition, you can find useful information on where it’s better to install thermostats and hygrostats inside the electrical cabinet.
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