About giant passive rad, where to find heat sink panels?

[migueld]

I'm doing a giant passive water radiator to be placed on the side of my tower, and I need a giant heatsink flat panel, something similar to this:


I've looked everywhere including eBay, and a bunch of custom extrusion companies but they are all offline-ordering and I think most require minimum order quantities. Any ideas?

[bigben2k]

Search for condensor or evaporator cores, including auto parts. They might be a bit restrictive, but they'll fit nicely. Also, I have a search running for "heat exchanger" that often returns interesting results.

Also: transmission and engine oil coolers (i.e. Hayden).

[davidzo]

@bigben2k: he searches for aluminium extrusion profiles, not for a big Radiator.

@migueld: Aluminium Extrusion profiles like that are really expensive. I wouldn't wonder if you need to pay a few hundred bucks to get two profiles eized like the zalman case in the pic. In Germany we have a Company called Fischer-elektronik, which has a big inventory of industrial coolers including such profiles. I ordered once from them, but its also only for companys and with aminimum ordering quantity.
I don't think you can get extrusions that big at other sources than the Companies producing them. This is one example of the thousands of nice materials which never come into retail and are only available for the industries.
If you are Lucky you can get some old used extrusion profiles at ebay, but it probably takes some time until you find the right ones.

[migueld]

Thanks for the replies. Yea I’m looking for large flat heatsinks, not the heater cores (although the ones at ebay are nice).

Davidzo, I’d settle with smaller heatsink panels; I could stick them together, but even those seem hard to find. Regarding your purchase, how were you able to get around Fisher’s minimum order requirement? I might be able to do something similar here in the US.

[migueld]

This seems the most promising place thus far:
http://www.thermaflo.com/bin/exsrch....&NumPerPage=v4

I'm now trying to figure out ordering, we'll see...

[davidzo]

Originally Posted by migueld

Thanks for the replies. Yea I’m looking for large flat heatsinks, not the heater cores (although the ones at ebay are nice).

Davidzo, I’d settle with smaller heatsink panels; I could stick them together, but even those seem hard to find. Regarding your purchase, how were you able to get around Fisher’s minimum order requirement? I might be able to do something similar here in the US.

I got the prototypes because i was doing some competition school science project back then and i won a few quite wellknown awards, and i offered them to list them on my sponsorship list. for the second (final) order, i fulfilled the minimum ordering requirements easily because i ordered heatsinks for 20 cases. since i have a oneman company it isn't a problem for me.

the link looks ok. give it a try
if you don't suceed, i could oder the profiles you need from fischer and send it to you, but shipping costs would be alot (~30-40€ DHL) additional to the fischer shipping costs.

maybe this could help too. Its a complete passive radiator already, but its relatively cheap for its size. passive performance should be better than with simply hughe car rads:
http://www.kailon.de/catalog/product...ff942494962775

[migueld]

Hey, thanks for the help; I appreciate your offer but like you mention it does sound quite expensive. I was able to get a quote at thermaflo.com for 3 pieces, which in all would cover the panel I need. But they run for about $70 each, and I can't really justify the expense.

On a lucky take I found these Thermalloy heatsinks :

10 of these for $9.99 US, and they measure 3" wide by .475" high by 4.75" length. So I'm thinking of getting these and putting them together.

That passive radiator you posted looks really nice; I'm surprised no one in the US is offering it. I don't like the acrylic covers because they seem to block air currents, and the fact that it interfaces with aluminum, it seems it'll be a corrosion generator. But it is quite appealing nonetheless.

I'm curious what company do you run? Is it about watercooling products?

Regards,

[davidzo]

Originally Posted by migueld

I'm curious what company do you run? Is it about watercooling products?

lets say it is about cooling in general and watercooling takes the biggest part of it. People at procooling don't like it when i talk about it, but as i see there are not many people left here, most went to XS or other sites.- its called cooling-store(.de) and its not the company who made this radiator. i used these profiles for passive cooling purposes.

[billbartuska]

Originally Posted by migueld

That passive radiator you posted looks really nice; I'm surprised no one in the US is offering it.,

"Really nice"