"Short Wave Sportfishing" wrote in message
oups.com...
On Feb 8, 2:16 pm, "JoeSpareBedroom" wrote:
"RCE" wrote in message

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"JoeSpareBedroom" wrote in message
...

"RCE" wrote in message
om...

to reduce the pressure and it will suddenly freeze again and begin
to
sublimate (goes from solid to vapor without becoming a solid).

All of this happens at what range of temperatures? When you're
reducing
the air pressure, the temp is remaining fairly constant?

As the pressure is reduced, the only temperature left is that remaining
in
the water, (aside from any radiant energy). As pressure is reduced,
the
vapor pressure changes. Often, high intensity quartz lamps or UV
emitters
are used to add energy to the remaining water molecules to excite them
to
a state where they can be removed or captured by the vacuum pumps.
Otherwise they cling to the vacuum chamber walls and will slowly
sublimate
for hours or days.

Think of your car's radiator. The pressure cap allows the cooling
system
to operate at a higher barometric pressure than at atmosphere, raising
the
boiling point of water. The opposite happens in the vacuum chambers.
To
a less obvious degree, the normal barometric pressure variations at
atmosphere affects dew points, etc. for a given temperature.

BTW ... in my partial sentence quoted above about sublimation ... I
meant
to say "goes from solid to vapor without becoming a liquid".

Eisboch

Well anyway, it appears I've gone beyond my streak of good luck with
windshield fluid. 35 years of driving in frigid climates, and never a
problem until now, when I get not just one, but two products in a row
made
by idiots or liars. The stuff's frozen in the tank, at 14 degrees F.-
Hide quoted text -

- Show quoted text -

I wonder if you got some extraneous water in the fluid tank?


Who the hell knows. The tank isn't in plain sight. It's below a bunch of
other crap, and only the spout comes to the top of the engine compartment.
So, it's far from any heat source. And, the entire bottom of the truck is
encrusted with frozen crud. I'll deal with it when I get tires next week.
Have it washed, go straight to the mechanic's, figure it out there. Bring
some name brand fluid (ha ha), drain the tank, start from scratch.

Good mechanic. He likes customers in the shop, as long as talk about fishing
and don't get in his way.