How to raise the temperature of liquid nitrogen from -196 degrees to -50 degrees. I earnestly beg for your guidance
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The last edit to this post was made by 丶Cold and warm on 2016-7-15 at 20:54. It would be helpful to have some ideas as well – could direct heating cause vaporization? Is there a pump that can directly increase the pressure of liquid nitrogen? Will the temperature rise accordingly?
It’s not possible; the critical temperature of liquid nitrogen is -147°C, and its critical pressure is 3.39 Mpa. At -50 degrees, it can only exist in gaseous form. If nitrogen is needed, a vaporizer can be used
Do you want to increase the pressure or the temperature? Explain clearly
To increase the pressure of liquid nitrogen, a plunger-type cryogenic liquid pump can be used; it remains liquid nitrogen after pressure augmentation. If nitrogen is to be used, a vaporizer is required
The critical temperature of liquid nitrogen is -147°C, and its critical pressure is 3.39 Mpa; if it remains in liquid state at -50°C, the pressure will be relatively high
To raise the temperature of liquid nitrogen from -196 degrees to -50 degrees, compression is the only option; the pressure required for this is estimated to be in the hundreds of kilograms. It’s almost impossible now – gaseous nitrogen at -50°C can be obtained using a vaporizer
Can it be heated with ethylene glycol?
Just use an air-temperature type gasifier directly
The wording is inaccurate; it’s impossible to have a liquid phase at this temperature
-At 50 degrees, nitrogen will not liquefy no matter what the pressure is; increasing the pressure means raising the temperature, which can compensate for the heat loss. The critical temperature of nitrogen is -147 degrees; this means that above this temperature, nitrogen will not remain in a liquid state no matter how much pressure is applied.