Regarding -80°C refrigeration
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Everyone, we need to cool a 200L reactor to -80 degrees. Should we use liquid nitrogen or a refrigeration machine? As far as I know, the efficiency of a refrigeration machine is very low. But if we use liquid nitrogen for cooling, how should we do it and what equipment is required?
Please give some feedback – just to stimulate further discussion. Should liquid nitrogen be passed through the jacket of the reactor, through the coiled tubes, or inside the reactor itself?
This approach of using dual cooling methods, namely cooling through an external jacket and cooling via the coils inside the tank, yields very good results. As for whether to use a refrigeration machine or liquid nitrogen, it depends on the availability of your auxiliary equipment
Ethane refrigeration can achieve -80°; taking into account the driving force provided by the temperature difference for heat transfer, methane refrigeration is likely required to reach around -100°.
Using a refrigerator results in higher initial costs, but it is more stable and easier to control