adccommunitymod (AutomationDirect) asked a question.
Created Date: February 02,2012
Created By: dieseltwitch
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Im working a system with many VFD's, almost 200HP in total split between 15+/- individual drives. My Problem comes in cooling. I calculated some where in the area of 25k BTU/hr... I'm trying to figure out the best way to handle this. I though about just doing fans, to vent with the air in the room. By the way the room is a mechanical room of a fairly damp environment and I'm not sure how hot it gets in there but here in colorado the summer air temp break 100 but only 1 or 2 days a summer on average. I looked at ac but I haven't even seen a 25k BTU/HR, Ice Qube makes a 20k... do two? I 've never put this many vfds in at once Ideas?
Created Date: February 02,2012
Created by: Do-more PE
At my past job I always put in multiple units that way we could set the temp so that they would come on sequentially as the temp went up.
Created Date: February 02,2012
Created by: dieseltwitch
No a bad idea! this application (car wash) will see loads come and go. one minute it could be very light, the next it will be running full out so having a staged cooling system seams like a good idea! I wish they made some sort of split system multi stage cooling system that I could use. maybe even one drive by a VFD of its own.
Ever built your own cooling system?
Created Date: February 02,2012
Created by: stillman
Enclosures AC's vs. Fan
Just be sure not to set the temperature on the AC units too low or you can get condensation inside the cabinet. I run ours at around 95 Degrees F.
Created Date: February 02,2012
Created by: dieseltwitch
Just be sure not to set the temperature on the AC units too low or you can get condensation inside the cabinet. I run ours at around 95 Degrees F.
Good Call. Thanks
Created Date: February 02,2012
Created by: dieseltwitch
Just be sure not to set the temperature on the AC units too low or you can get condensation inside the cabinet. I run ours at around 95 Degrees F.
Does the AC help to dry out the air in the enclosure? Does condensate form on the evaporator coil that can be drained off?
Created Date: February 02,2012
Created by: Do-more PE
If there is enough humidity in the air, yes. It is not as efficient as a dehumidifier, but it will remove some of the moisture content in the processed air.
Created Date: February 03,2012
Created by: dieseltwitch
Yeah but for the most part we are relatively dry. the wind here keeps things dry. I was stationed in Ft. Hood tx where it felt like 100% at 4am when i went to work. if you look at the graph it only break 70 once! and hovers right around 30%-40% either way. it never gets close to 90% (the limit for the drives) so if the AC can condense even a little water out of the air i will fine.
I'm just trying to do my due diligence to make sure that the setup is going to last. I 've seen a few washes lately that have the drives just bolted to the wall and even see one in the tunnel! and the drives last less than 1 year and give VFD's a bad name
Created Date: February 03,2012
Created by: KB1GNI
Of course, if you are washing cars nearby there is going to be more humidity in the area than normal. I think you'll be fine, though, just don't try to cool beverages inside :) and you should be OK.
Created Date: February 03,2012
Created by: dieseltwitch
hahaha, Ill keep that in mind.... VFD Cabinet does not equal beer cooler... GOT IT! lol
Created Date: February 02,2012
Created by: dieseltwitch
Im working a system with many VFD's, almost 200HP in total split between 15+/- individual drives. My Problem comes in cooling. I calculated some where in the area of 25k BTU/hr... I'm trying to figure out the best way to handle this. I though about just doing fans, to vent with the air in the room. By the way the room is a mechanical room of a fairly damp environment and I'm not sure how hot it gets in there but here in colorado the summer air temp break 100 but only 1 or 2 days a summer on average. I looked at ac but I haven't even seen a 25k BTU/HR, Ice Qube makes a 20k... do two? I 've never put this many vfds in at once
Ideas?