Mobile Nuclear Power Station

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Andrew shows how you can

Hi!

First of all I’d like to introduce myself: I`m a 22 year old Hungarian man. I made my first watercooling stuff in the late July, 1997. I tried several things like: aircooling, water, vapochil (gas), subzero liquid, peltier, etc., but I found out that watercooling and maybe a peltier would do fine.

Case Front

But there is a problem: I always go out for LAN parties, so I had to make my cooling mobile. I have a big case, so I was thinking about what if I take my cooling inside the case. It`s an old AT case, but I transformed it into ATX 3 years ago.

First I have to talk about the CPU cooler – it’s made of copper and milled. The cooler is soldered with 8mm pipes inside and outside. But the pipes in the system all have 10mm diameter. There is a little rubber on the “block” to hold itself in place.

Waterblock Unmounted

Waterblock

An important thing is how to get rid of the captured heat. I solved it with a car`s heating unit [heater core]. It`s surface is big enough; let me count: 100 copper snails [fins]* 15 column * 7 cm depth + 3cm wide pipe * 2 sides *14 pipes * 2 up and down way = 10,668 sq cm. Dimension: 19,5cm high, 13,2wide, 7,5 deep.

It is soldered brass: up and down units, and soldered copper snails. Capacity: 2,1 dl. All the stumps are made of copper, some of them with epoxy resin, some by soldering. The stumps have 10mm diameters. You see I had to cut the case because of the L figures – the pipes cannot make the curve that the case requires.

Heater Core

Pipes

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AndrewBoy

Since the heatunit had to be put into the case, I had to pay more attention to air handling. After trying the fans behind and in front of the unit, I decided to mount them behind. I found an old junk 24x Panasonic CDRom case and I cut out a 15,8*7,8 place for two 8cm fan. The CDRom`s case is very good, because the heatunit has the same width as the CDRom`s case. I hermetically sealed it with epoxy and solid sponge.

Rad

Rad Mount

I had the problem of getting fresh air into the case. I had to cut the front of the case to let the heatunit get enough fresh air.

Case Cut

Case Front

The last thing was water circulation. I`m using a little DE800 (800l/h) pump. It requires 220v power, so I connected it up to the Power Supply`s 220 out connector. When the machine starts, the pump also starts. This pump is transformed to be a kind of inline pump, so I just plug it in and play (or pray;-]]).

Case Detail

The filling works with a T adapter. This adapter is in the highest point of the system and when I fill it up, it automatically pushes out all the air inside. To take out the water, just unplug the pump`s input pipe. The capacity is nearly 4,1 dl. Interesting to count: if the pump works at 750 l/h, then a full cycle takes 750/0,4= 1875, 3600/1845 = 1,92 seconds. It`s quite short. To close the system, I just plug a rubber stopper into the pipe on the upper side.

Case Done

Last question is: What can I do with this?

I`m cooling a 1 GHz AMD Athlon (2*256MB Infinion PC133 RAM, ABIT KT7A raid, 41 GB IBM 7200 ATA100, etc.). I`m using the processor @ 1,5 GHz without any problem.

The minimal temperature at idle: 26 C; maximum: 37 C. The liquid consists of distilled water and antifreeze (5:1). At 1,5Ghz (150*10), it is a stable system; at 1,55 GHz, sometimes it makes errors.

CPUID

Next time I will try it with peltier and a new CPU cooler.

AndrewBoy

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