Is it possible to use a 400Kw inverter installed inside a positive pressure fume hood?
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We have an engineering project; the owner’s power distribution room does not have enough space to accommodate additional cabinets. They have requested that we place the frequency conversion cabinet in a Class 2 hazardous area. We are considering using a positive pressure ventilation cabinet on-site at the factory, but given that the frequency converter has a power rating of 400 kW, there are issues related to heat dissipation within such a ventilation cabinet (two air conditioners would be required). We would appreciate any suggestions from those with expertise in this area Or please recommend some good manufacturers in China that produce positive pressure fume hoods. Thank you!
With extremely high power levels, the positive pressure fume hood needs to be large in size; positive pressure ventilation can be used. Calculate the heat generated by the inverter, and as long as the cooling requirements are met after ventilation, it will be sufficient
The cost of using large air conditioners for cooling is a bit high; it’s better to use water-cooled circulation fans for heat dissipation
Air conditioning cannot be used in the explosion-proof zone; only positive pressure ventilation is allowed
The air conditioner is built into the positive-pressure fume hood, while the wall-mounted unit is located outside.
That’s also an option; however, if air conditioning is built in, the cost will be higher
The fume hood is properly set up, and cooling and drying compressed air can be used for ventilation over the long term. Air conditioners can also be used for this purpose; there are specialized air conditioners designed for use in explosion-proof areas. What’s important is to ensure that these installed systems operate properly, with proper fault detection, regular maintenance, and emergency procedures in place
Do you have any experience using explosion-proof air conditioners?
There really are; in our facility, explosion-proof air conditioners are installed in the instrument control room where the gas boilers are located. Actually, at first I thought it was just a trick, but I noticed that the power supply and other components as well as the wiring elements were provided with explosion-proof sealing, so that shouldn’t be difficult
Huarong and New Dawn both have positive pressure cabinets, and the Expo positive pressure system can be used. This positive-pressure cabinet is equipped with two explosion-proof air conditioners, which is a good thing; however, maintenance of them can be rather troublesome later on.