What is the approximate temperature of the liquid nitrogen after passing through the subcooler and reaching the storage tank? It’s definitely impossible to be lower than the temperature at the top of the tower. If entering a tank at pressure zero at such temperatures. Won’t the liquid nitrogen boil and vaporize then?
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As the title suggests, I would like to consult the experts and seniors here
At normal atmospheric pressure, the boiling point of liquid nitrogen is -196, while the temperature at the top of the upper column is only -192
Worrying about this topic really has no practical meaning; it’s enough to have a general idea of it. I’m not sure what your process is like, but in the case of liquid nitrogen passing through a cooler, it should be liquid nitrogen at relatively high pressure that is subcooled. Because the liquid nitrogen present in various parts of the tower in liquid form (without being cooled by a subcooler) is always in a saturated state. If liquid nitrogen that has been cooled flows out, the degree of supercooling in this case will not be very high, and the pressure inside the tank will not be very high either; it will be roughly at a saturated state. As for vaporization, it occurs at all times depending on changes in environmental pressure and temperature.
Thank you! In other words, vaporization boiling keeps occurring in the nitrogen tank. Thank you, I’ve learned it