Damien Broderick wrote:
>
> At 03:14 PM 26/08/00 -0700, James wrote:
>
> >> Is an Arakis still-suit permissible?
>
> >the evaporated sweat would have to re-radiate the heat
> >it has absorbed (impossible to do passively if the ambient temperature is
> >above the body temperature), again effectively negating the cooling
> >effect. Actively powered systems would work, but defeat the purpose.
>
> Could you carry a well-shielded container of near-zero K helium (or
> whatever) across which the evaporated sweat passes? Would this be
> mass-cost-effective compared with carrying water? Is the required thermal
> shielding too heavy? Yes, clearly you'd need a powered system at *some*
> point to re-freeze the coolant, but maybe this would get you further than a
> bag of H2O you have to piss away?
Since I've seen camping coolers that use a small solar panel to power a solid
state cooling device, I would imagine that a still suit would have PV devices to
power the cooling of collected water by similar means...
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