how can you make a bar fridge cope with cpu heat?

[Default]

my fridge is small but not overheated. condensers are only mildly warm yet the water is still not as cold as i would like. any suggestions for improvment on this setup:

water tank with submerged icebox(evaporator)
modded sk-6(no fins)
clear tubing(no insulating)
and tank inside fridge.

[Tiger]

Firstly measure the temp of the water going into the block and then comming out.
Determine the flow rate- quick way; time how long it takes to fill a one liter jug and then correct for 1hour.
With these figures go top this site;
http://fridgetech.com/
Click on calculators and go down to chillers. There is an on-line calculation for what wattage the compressor should be in KW. When you have that compare it with the fridge you are using.
Thermal insulation of the coolant is important. The tank should be well insulated inside to prevent it being heated by the interior of the fridge. Remember that while the freezer may be at -22C the interior is about +3C. All the pipes should be well insulated as well.

[Default]

gotcha, but i don't think i'llbe getting a new compressor any time soon;)

[Tiger]

That may not be necessary because I have an idea about staging.
I'll explain this. Say in your situation you go and do these calcs and find that the compressor wattage is too low. You have say a 90W comprssor and you calculate that you need a 150W. My idea is that most of these fridges have the ability to house two compressors at the bottom. You go out and get an old fidge with another 90W compressor. Cut the of the fridge open so that you can remove the evaporator. Remove the whole refrigeration unit intact and then cut open your existing unit and install the second refrigerating system with the first. Now using two tanks each with its own evaporator you will be able to feed the overflow from the first tank into the second. The two units are are now serial and you will have the combined refrigeration effect.