Liquid nitrogen pre-cooling
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I would like to ask everyone: what pressure is appropriate to maintain in the storage tank during gas-phase pre-cooling as well as liquid-phase pre-cooling with liquid nitrogen? The temperature of liquid nitrogen is -196 degrees Celsius; what temperature is considered acceptable for pre-cooling in the gas phase? Can it be directly fed into the liquid ethylene phase after pre-cooling with liquid nitrogen? Our storage tanks are low-temperature, atmospheric-pressure tanks with a design pressure of 0.6 Mpa and an operating pressure of 0.2 Mpa; the working medium is ethylene, and the operating temperature is -102 degrees Celsius.
As long as the various parameters remain within the container’s capacity limits, there should be no major problems. The key lies in how you design them, as there is no strict right or wrong. What you described isn’t clear enough, making it difficult to discuss
You can check the pinned post in this version to find free options for meeting such needs, or search on Baidu for “Daxueshi””
If only pre-cooling is done, it’s best to maintain a slight positive pressure~~this yields the highest efficiency~~