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Old 03-09-2012, 07:59 PM   #9 (permalink)
Ecky
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Water is the most efficient coolant you're likely to come across. It has a low viscosity (easy to pump), a fair heat capacity, but more important, very high thermal conductivity. Most liquids you could use for coolant fail to beat water in 2 of 3 areas.

Antifreeze for instance raises viscosity and lowers conductivity, even if it raises heat capacity.
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