Exos Style Heatercore shroud??

C

CCUABIDExORxDIE

2[H]4U
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Jan 30, 2005
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Alright, im going wcing soon, and i dont have the room in my case for a heatercore, so im using an external setup. i plan on putting the heatercore on the top of my case, with a shroud around it for a case. the whole blue thing is the wooden or metal shroud.

shroud.png


thats just a rough sketch, i will make more if more are needed. will this hinder performance of the heatcore at all? the heatercore will have approx. 1 1/2 inches of free airspace below it. will anything hinder performance? i will have the fans blowing, as sucking wouldnt be too adiquate i think. any suggestions on how to make this better?
 
A separation of 1.5 inches is a good distance to get maximum performance. Also, fans work better against restriction when pulling the air through the radiator rather than pushing it through.


ie. Rad -> Fan ---->

with the air travelling in the direction of the arrows.
 
ok, so just switch the way the fans blow, and ill cut some good side slits of air to enter the shroud with. does everything else look good, or something else you'd change?
 
Wow... your fan shroud is like an M C Escher painting. You should call the case "Relativity" after the painting he did where perspective is all messed up. I'm going to sit here a while and try to decide if I'm looking into the shroud from the bottom or at the shroud from the top.

Sorry... didn't mean to be a prick.

I think that'll work well. I did something very similar. And Erasmus is right... draw the air through the radiator instead of trying to push through. When you think about it it works much better. If you try to push air through a Radiator the resistance created will simply keep air from passing into the fan in the first place. If you create suction behind the radiator the fan will just keep drawing through it.
 
1.5" is excessive to say the least. .5" between the fans and the heatercore is plenty. Keep it nice and simple.

Dont cut slits in the shroud. Cut a huge hole in the top of the case for the radiator inlet. Put the radiator on top, then put the shroud over that and seal the shroud against the case. Have the fans suck air out of the case through the radiator and out the top.
 
the fans and heatercore will be flush almost, the 11/2 inches is between the bottom of the heatercore, and the top of the case. also, do you think bondo would work to attach the shroud to the case?
 
killernoodle said:
1.5" is excessive to say the least. .5" between the fans and the heatercore is plenty. Keep it nice and simple.

Dont cut slits in the shroud. Cut a huge hole in the top of the case for the radiator inlet. Put the radiator on top, then put the shroud over that and seal the shroud against the case. Have the fans suck air out of the case through the radiator and out the top.
Click to expand...

1.5" is by no means excessive. Measure the width of a fan hub on almost any 120mm x 38mm fan (which is the cause of the airflow dead spot under each fan) and you will see why 1.5" of standoff is much better than .5"
examples:
panaflo - 2-1/4"
sanace - 2-1/4"
Delta - 2-1/8"
Nidec Beta V tri-blade - 2"
Silent Fan Aluminum - 2-3/8"
Panaflo Aluminum - 2-1/4"
Comair Rotron AC Muffin - 2-1/8"
Comair Rotron DC Muffin - 2"

If you use a fairly accurate thermometer (i.e. Omega 5830 ) to test the different levels of standoff, the performance difference is obvious.

on the other hand, definitely cut out a large opening for airlflow through the underside of the heat exchanger as opposed to small slits. there is another way to work the airflow but I can't really see it fitting into your current design.
 
Hey weapon, is it beneficial to have wall within the shroud, halfway down so that the turbulence generated by the fans are isolated from one another? Would this yield better performance?

It is something I have been wondering, and also something to take into consideration for your shroud, CCUABIDExORxDIE :)
 
DarkenReaper57 said:
Hey weapon, is it beneficial to have wall within the shroud, halfway down so that the turbulence generated by the fans are isolated from one another? Would this yield better performance? It is something I have been wondering, and also something to take into consideration for your shroud, CCUABIDExORxDIE :)
Click to expand...

rev2.1shrdfinal.jpg

^look at the middle section of the shroud between the fans. :)
lol. I wish we could have left that sucker out because having them welded in place (or any other solution we could think of) makes shipping them in large numbers a pain. With the dividers, they won't stack so they have to be individually wrapped and layered and the box dimensions are 10 times what would have been required without them. I am working on a design that would likely work just as well without it but I suspect it will cost way to much to ever produce in any volume.

anyway, as for external/top mount boxes, for comparison, the prototype of my canadian partner's current project can be found here
hmmmm....looks like a weapon shroud would bolt right in under the top of that one.... ;)
 
So I'm guessing it does have a performance benefit? :confused: :)

I just don't want to mod my shroud if it isn't worth it.
 
weapon, your friends shroud looks perfect for what im planning on doing, except the fans are on the outside instead of the inside. im sure i could mount fans on the outside. what do you think would be a better performer? and how much will that shround cost?
 
DarkenReaper57 said:
So I'm guessing it does have a performance benefit? :confused: :)

I just don't want to mod my shroud if it isn't worth it.
Click to expand...
yes, there is a bit of a performance gain from it - it is not one that will blow your socks off or anything but it is definitely there.

CCUABIDExORxDIE said:
weapon, your friends shroud looks perfect for what im planning on doing, except the fans are on the outside instead of the inside. im sure i could mount fans on the outside. what do you think would be a better performer? and how much will that shround cost?
Click to expand...
I am not entirely certain on the pricing as they are still in development. I built several similiar enclosures some time ago and I am still halfway considering redesigning one of them for production (my originals always seem to be cranked out at 2am on the gear I have in my shop so they are often not CNC friendly for one reason or another and require some tweaking before they can be produced on big machines). In the alternative, malph's design is looking good and I might just send some ideas to him to see if he wants to incorporate them into his model.

internally mounted fans vs. externally mounted fans
there really is not much of a performance difference provided you account for a couple of different factors:
1. the fan cutout needs to be made a little differently for interally mounted fans as the fans will be blowing air through the fan cut out as opposed to pulling air through the fan cutout.
2. standoff - to mount the fans internally and still maintain the same amount of standoff, the box will have to be about 40mm taller.

Hmmm...externally mounted fans that pull air through the core and then up and out of the shroud might have slightly smoother airflow as the fan housings on internally mounted fans could create some minor turbulence inside the box. Of course, a lot of minor performance differences can add up to a substantial performance difference once combined...
 
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