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#1
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Overheating Need Help!
Help. I have a custom built in home theater/high end audio
installation. The equipment is behind closed wooden doors. There are two 5ft racks full of blister generating equipment (4 power conditions, 5 mono block amps, satelite box plus the head gear that's getting baked). There is an 10" gap between the back of the builtin unit and the wall. In the wall behind the unit are 4 120mm fans, two at the bottom, two at the top (bottom blows in, top blows out from/into the next room). Problem: Still baking equipment. There is also plenty of bottom air flow but it seems that the equpment, being densly packed and close to the front doors prevents the air flow from circulating from the bottom-back, to the front-top and out the top/back. It appears that the open space behind the rack is getting the circulation but not the equipment. I have engieered the built-ins such that the audio equipment is directly under the HVAC air return in the ceiling (drawing air up into the HVAC unit). This draws additional air through the builtin but I'm still concerned about the heat. This is a bit complex sounding and I have a nice PDF drawing of the current installation that is worth a thousand words if you'd like to take a look. Photos avaailable as well. As many of you already posted, the solution MUST be quiet yet effective. Perhaps 200lbs of dry ice on top? |
#2
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Overheating Need Help!
wrote in message ...
Help. I have a custom built in home theater/high end audio installation. The equipment is behind closed wooden doors. There are two 5ft racks full of blister generating equipment (4 power conditions, 5 mono block amps, satelite box plus the head gear that's getting baked). There is an 10" gap between the back of the builtin unit and the wall. In the wall behind the unit are 4 120mm fans, two at the bottom, two at the top (bottom blows in, top blows out from/into the next room). Problem: Still baking equipment. There is also plenty of bottom air flow but it seems that the equpment, being densly packed and close to the front doors prevents the air flow from circulating from the bottom-back, to the front-top and out the top/back. It appears that the open space behind the rack is getting the circulation but not the equipment. I have engieered the built-ins such that the audio equipment is directly under the HVAC air return in the ceiling (drawing air up into the HVAC unit). This draws additional air through the builtin but I'm still concerned about the heat. This is a bit complex sounding and I have a nice PDF drawing of the current installation that is worth a thousand words if you'd like to take a look. Photos avaailable as well. As many of you already posted, the solution MUST be quiet yet effective. Perhaps 200lbs of dry ice on top? Without seeing it of course it's hard to know. The problem may be that you have conflicting airflow within the spaces. and while a lot of air is potentially being blown in or sucked out, in fact it may just be circulating internally. If each unit has it's own fans internally or air vents then you need to make sure that your fans are assisting the air to move in the same direction. Also if it's possible to re-order your units in the rack, try putting the hottest units at the bottom, giving them the coolest air, rather than adding to their heat generation by giving them the air heated by all the others items. And take a look at the heat sink air vents in each item & try & make sure that air can flow freely through them.. this may mean even rotating items sideways in the rack, if it's not possible to leave enough space. If it's a home built cabinet, drill some big holes through each supporting shelf to allow upward airflow . I hope this helps Cheers, Ric |
#3
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Overheating Need Help!
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#4
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Overheating Need Help!
Thanks for the replys Albatross/Bear. I wish I could attach a PDF of
the design to help illustrate the problem. The pressurization comment is interesting. There is a lot of free cubic feet of air to move and 2 x 120mm fans probably are not making a dent. If that IS my problem, (other than an addiction for audio/video) what is a good brand of large, quiet squirrel cage blowers? |
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