Heatsinks in 19", 3unit case..

[TroelsM]

Hi.

I'm designing some electronics that needs to dissipate a lot of power. I'll be using a 19", 3 unit case and I'm thinking of using standard 100*160mm PCB's in a case like this:

http://www.fischerelektronik.de/fisc....3.5.U.1.1.pdf

I would like the heatsinks to be horizontal and not vertical. Any Ideas how/where to get a case like that?

If a special case is not available, then maybe just a heatsink with the right dimensions?

I'll be mounting a number of PCB's in the same 19" case, and I'm going for a solution that's as compact as possible (but not liquid-cooling though..)

Regards TroelsM

[Nisbeth]

How much is "a lot of power"? The Rth of your heat increases quite a bit if you mount it lying down instead of upright.


/U.

[TroelsM]

Hi.

It seems that I was in a bit of a hurry yesterday... I forgot some information:

The case will be fan-cooled

It might be ambitious, but I would like to dissipate something like 500-1000W in the 3U case... Yes it's a lot, and if it's impossible then I'll have to change my plans.

There's going to be a number of these 3U-cases in the same rack

If the air-flow is vertical then I'll either have to leave some space between each case or "re-cycle" the air and force it trough multiple cases. The latter approach will require some high-pressure fans and there is still the problem of trying to "cool" the top-case with the hot air from the bottom case...

If the airflow on the other hand is horizontal then i could force the airflow from front to back in the rack. This would make each case more "independent" and I could stack them as high as I would like to.

Hope this clarifies things.

Regards TroelsM

[jcx]

http://www.behringer.com/EP2500/index.cfm?lang=ENG

is a 2 U rack mount "2500" W probably ~ 800 W being dumped at max [actually may be a little lower with "class H" ouput, little brother ep1500 has to be dumping 500 W with class AB ouput]

should be able to find pics of insides

I would consider buying a similar PA amp for such a project just for the hardware that already fits together - I can't buy the mechanical parts/hardware for the finished PA amp sale price

[TroelsM]

Hi jcx!

That actually not a bad idea! I don't know why I didn't look to the "PA-amp-scene" for inspiration...

Although the idea about using a pro-amp-case i tempting, there are other restrictions to this project that might prevent from using this approach.

Regards TroelsM

[Jan Dupont]

Please tell me if I'm wrong, but as to my knowledge, this behringer amplifier case are not suited to dissapate over 500W.
Those amp cases are entended for class T amps, where the heat is heat is less and where high peak outpout power doesn't create the same amount of heat as conventionel electronics and "older" amp types

[jcx]

the ep1500 is certainly plain jane class ab so it has to be over 500 W pdiss when you throw in some ps inefficency - if the ratings were honest