The image above shows an electrical panel located over a belt press machine. Belt press machines can be used in a variety of mechanical separation applications, from juice manufacturing to de-watering of grains, and even algae extraction. The use in this application, however, was to assist in the removal of liquid from styrene via multiple “wedge zones” which force the styrene between an upper and lower belt, applying increasing pressure and forcing the liquid from the styrene roll.
The Plant Manager of the facility which uses this cabinet contacted EXAIR in search of a solution to provide cooling for this enclosure, and wanted to know if we could also provide some means to provide a constant ventilation as well. We discussed the merits of the Cabinet Cooler in terms of cooling power, and also discussed our Non-Hazardous Purge Cabinet Cooler systems which provide a constant feed of 1 SCFM of compressed air into an enclosure. This slight airflow into the cabinet provides a slight positive pressure which further helps to prevent any dust from entering the cabinet. For older cabinets with potentially weakened seals, these systems can provide an added level of protection against harmful dust in the ambient environment.
After sending a Cabinet Cooler Sizing Guide and determining the proper model number (NHP4825), the customer asked about lead time. They said that the machine was intermittently shutting down and they needed something FAST. I informed them that EXAIR Cabinet Coolers ship from stock and we can even ship UPS Next Day Air if need be.
Knowledgeable engineering support coupled with a shoe-in solution and on-the-shelf availability got this application under control quickly. If you’re having a similar experience with your electrical control panels, contact EXAIR’s Application Engineering department for a similar solution experience.
One of the main focuses for Cabinet Cooler Systems is to cool electrical enclosures that are overheating due to inadequate cooling, failing air conditioners, or heat exchangers that are not performing due to high ambient conditions. Another focus is the fact that the Cabinet Cooler Systems don’t require refrigerant based coolants, or fans that can move dirty ambient air into the cabinet. This is the portion I would like to focus on today.
If there are vents on the enclosure then these are sometimes covered with a filter media that is an easily forgotten maintenance item – sometimes they are even removed. This is an issue as it starts to allow the contaminants from the surrounding area to begin to enter the inside of an enclosure. In case you have never seen a circuit board that is covered in oil mist and metal chips, it is terrifying to see a maintenance person that is trying to troubleshoot the machine for failures. Not only does this present a fire hazard but it also presents the internals of the panel with a strong probability of failure.
Another item I have personally seen fail in the field are small fans mounted within enclosure vents to help circulate air through the enclosure. This is a great idea if the ambient environment is climate controlled and has no dirt or debris in the air. Even in a facility that is climate controlled there is still potential for airborne debris, dust, and contaminants to enter the cabinets. These are merely accelerated into the cabinet by the fan and distributed throughout the entire enclosure instead of just coming in and covering the area just inside of the vent.
The solution to all the problems above which can easily save thousands of dollars worth of damaged circuit boards or drives is an EXAIR Cabinet Cooler System. The Cabinet Coolers will all provide a slight positive air flow within the enclosure and will help to keep those external ambient conditions out of the cabinet and away from valuable electronics. Even with our thermostatically controlled systems (which turn on and off as needed to maintain internal temperature AND save air) we offer a Non-Hazardous Purge option which will permit a 1 SCFM flow of air through the Cabinet Cooler to always keep a slight positive pressure within the enclosure. When the cabinet needs to be cooled, it will open the solenoid valve and provide the full rate of cooling from the Cabinet Cooler System. The Non-Hazardous Purge function is available for all three NEMA types of Cabinet Cooler Systems, 12, 4, and 4X.