Antifreeze/H2O Ratio

[Larry C Leung]

Without investigating this too fully, (again, not running anything that
close in margin, so no need to investigate) I'd say, as long as there is
enough heat capacity in the system (i.e. mass to hold the heat, i.e.
volume of coolant) so that removed heat doesn't raise the fluid's temp to
it's boiling point, that the heat transfer rate is probably more
important. The question is, does EG reduce the surface tension enough to
really improve water's wetting? And what is the "measurement" of surface
tension?

LL - NY

On Sun, 8 Apr 2001 06:34:47 -0700 (PDT) =?iso-8859-1?q?mike?=
<mikemk40 at yahoo.com> writes:
>
>--- Robert Myers <robert at s-cars.org> wrote:
>> At 08:23 AM 4/8/01 -0400, Larry C Leung wrote:
>> 
>> >Mike,
>> >
>> >Anti-Freeze lowers freezing point/raises boiling
>> point BUT has
>> >comparatively poor heat transfer properties
>> (compared to water) and less
>> >heat capacity (ability to store heat). IF you can
>> keep temps down below
>> >the mixture boiling point, more water will transfer
>> more heat from the
>> >head to the radiator.
>> 
>> 
>> >Water Wetter (Redline) helps water/antifreeze (or
>> >water alone) be in fuller contact with the metal
>> surfaces, also helping
>> >heat transfer.
>> 
>anti freeze also lowers surface tension and so
>improves heat transfer...does this offset the lower
>heat capacity? ie which is the more important effect?
>
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