Now this seems like
an intrinsically funny challenge to me. What a completely
barking thing to be trying to do - keep someone cool
in Death Valley on their "Mars Mission".
Barking? Yes. Easy? No. In the series on Cariacou,
we completely failed to make ice, so the stakes are
up for making a cooling system.
We're all quite hopeful - zeolite is amazing. The image
I have is that it just sucks up moisture like mad, so
using it and a partial vacuum together could help us
enormously (it should help get a lower pressure by sucking
the moisture out of the air).
But different zeolites will have different abilities
to 'suck up' water. And even if Ian finds some, it may
not be very pure - so it's great Mike is getting some
from detergent too.
I spend a while thinking about the design for the 'fridge'
and talking to the others. It would be easier to have
one compartment with water in to cool, and zeolite suspended
above it to extract evaporated water. But the zeolite
gets hot, and having something hot in the same volume
as the water we're trying to cool just can't be a good
But the separate container I decide to make for the
zeolite needs a load of holes to make the connections
to the main container, and none of the drill bits are
a good size for any of the decent tubing I have. It's
such a small issue, but such a pain in the neck, as
holes that are much too big will be hard to seal. Anything
that isn't sealed will trash the vacuum we're trying
A lot is frustrating here!