sebin wrote:Thats exactly what i thought...using cold finger type...
But is that product available in the market?
If not its a really good method for cooling.
What abt the other suggestion reagarding the use of seeback effect for power generation using CPU heat.
Cold fingers are common. However, they are not very portable. They are laboratory devices that use cold water circulating through a 'thumb' for local cooling. Probably you can go ahead with your concept of a portable device based on a Peltier chip.
The only issue is that the element has to be produced in a tubular shape with the hot junction inside and the cold one on the outside. The inner surface has to have the heat removed. For this to be fast you may think of using a heat pipe that extends above ending in a finned radiator.
The second problem is the power. To cool a 200 ml volume of liquid from 25 degC to 10 degC you need about 6 watts at 100% efficiency. This would completely drain two mtal hydride AA cells of 2.5 Amp. Hr. capacity. You will have to recharge fully for the next shot of cooling. Any thing more than twoo AA cells may prove too bulky.
Battery technology is advancing. You may have to put in some serious design effort from this point on if you are thinking of commercializing your idea. Or sell the idea to any consumer goods or liquor manufacturer.
Somewhat similar considerations apply to producing power from CPU heat. If you do a detailed calculation you will find that it is not commercially viable.