4 replies to this topic

[benallou souria]

Good morning everyone;

How can I calculate the liquid Nitrogen Evaporation Rate (NER) in creyogenic tank?

Thank you

[breizh]

Hello Souria ,

To me you should consult the supplier of cryogenic tank . For example consider the Chart's brochure in the link

underneath . It has to do with the quality of insulation of the tank.

 

http://files.chartin...BulkCatalog.pdf

 

Hope this is helping you

Breizh 

Edited by breizh, 06 October 2020 - 06:59 AM.

[benallou souria]

Hello Braizh;      

Thank you for your help.

Souria 

[jayari]

This value usually isn't calculated by the end user when you buy a new vacuum jacketed vessel. If you have an existing vacuum jacketed tank that is getting old, you will have to monitor the level (or weight if possible) over time and calculate the average loss over time. I've seen this be more of an issue for the portable vacuum jacketed tanks that are used in labs.

[astro]

Good morning everyone;

How can I calculate the liquid Nitrogen Evaporation Rate (NER) in creyogenic tank?

Thank you

If you plan to do this from first principles, then this paper offers guidance:

https://www.ijedr.or...JEDR1501040.pdf

BTW - this turned up for me by web search.

 

If you've got plant data or a mass & energy balance with sufficient detail, you could work up an empirical basis and then scale it to the use case that you're interested in.