The Science Behind Steam Ejectors for Vacuum Creation

[kaushal]

Mmmmm... why only steam is used in a steam ejector for creating vacuum and not anything like air or other inert gases...

 

[lalbatros]

I think air ejectors, N2 ejectors, natural gas ejector, and other types are also used.
It all depends on the applications and the environment.
Sometimes HP steam is easily available, maybe.
Sometimes compressed air is available.
Sometimes O2 is prohibited because of explosivity.
I don't know all the possible design aspects.

For further discussion, I think, you should give more details about what you have in mind and your reasons.

 

[ravenprp]

The reason why steam is used in a steam ejector for creating vacuum is due to its physical properties and behavior. Steam is a highly efficient vapor and has the ability to expand rapidly when it comes into contact with cooler surfaces. This expansion creates a high velocity jet of steam which can then be used to create a vacuum.

On the other hand, air and other inert gases do not have the same properties as steam. They do not expand as rapidly and are not as efficient in creating a vacuum. Additionally, air and other inert gases can also contain impurities which can affect the performance of the steam ejector.

Moreover, steam is readily available and inexpensive, making it a practical choice for use in steam ejectors. Other gases, especially inert gases, may be more costly and difficult to obtain. Therefore, steam is the most suitable and efficient option for creating a vacuum in steam ejectors.