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Vacuum sucks - Alex Belits
Vacuum sucks
Yesterday and today at work I was testing one of the versions of thermosyphons/heat pipes making process. Custom tools worked perfectly, no glitches in sealing procedure, everything was fine, yet after everything was done tests shown absolutely abysmal performance. All for the reason outlined in the subject -- I have forgot that if I am pulling a liquid into a vacuum through a small opening, large amount of liquid will evaporate while doing so.

When I have calculated the volume of the liquid that entered the pipe before the pressure equalized, it became obvious that most of it simply turned into a vapor, and kept the rest from entering, leaving me with less liquid than what I expected.
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