Almost all users of liquid nitrogen Dewars will ask this question. After all, before this, samples died due to unclear storage time of liquid nitrogen Dewars, and there were many cases of irreparable losses, and samples were so important. thing.
Today, let’s talk about how long liquid nitrogen can be stored in a liquid nitrogen Dewar?
In fact, the storage time of liquid nitrogen has a great relationship with the thermal insulation performance of the liquid nitrogen dewar and the size of the caliber of the dewar.
A liquid nitrogen Dewar with good thermal insulation performance can slow down the evaporation time of liquid nitrogen. At present, the material with better thermal insulation performance is aviation aluminum alloy, and a liquid nitrogen tank made of aviation aluminum alloy can be selected.
Then there is the caliber, the size of the caliber will be determined according to your own needs!
Different calibers of liquid nitrogen Dewars have different volatilization amounts. Take Tianchi Liquid Nitrogen Dewars as an example:
10 liters of 50mm diameter, the daily evaporation is 0.09kg, and the static storage time of liquid nitrogen is 100 days;
10 liters of 80mm diameter, the daily evaporation is 0.15kg, and the static storage time of liquid nitrogen is 56 days;
80 liters of 125mm diameter, the daily evaporation is 0.59kg, and the static storage time of liquid nitrogen is 135 days;
……and many more!
The specific storage time can be obtained by contacting the manufacturer!
Note: The static holding time is when the liquid nitrogen Dewar remains unopened!