[Ti] Need cool air vs. heat Advice

[Dr. Trevor J. Hutley]

At 20:59 -0400 13/6/05, Kaskudoo wrote:
>i had the idea to put a spare marble plate underneath the tibook - 
>that worked phenomenal
>if you have a stone plate (marble, granit, preferably an inch thick) 
>then that might be a solution too

Kaskudoo - our resident pastry chef ! - I think this stone slab is a 
good idea, certainly if the alternative is a wood or leather-topped 
desk.

It is a matter of thermal conductivity (stone is good) and thermal 
capacity (stone is good).

I would put the stone in the freezer before you start, to get as much 
heat out as possible.

If you have a glass-topped desk, then that could also be fine.

An aluminium block (best specific conductor of heat) or a copper 
block is also an option, especially if it has fins for air cooling.

Those in banking or equally lucrative professions might try gold 
ingots or plaques.

As I said, conductivity is the property you seek, combined with 
thermal capacity.

What I mean by the latter is that eventually (if you are doing hours 
of video conversion) then the stone will also get hot, and lose its 
cooling effect (which is a function of the temperature difference).

When I was doing a lot of CPU intensive work, I was using plastic 
bags with ice cubes in, as a bed for the Powerbook, which kept it 
nice and cool for a few hours.

regards, Trevor