×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Recover cooling energy from Nitrogen Vapour Exhaust / Air mix

Recover cooling energy from Nitrogen Vapour Exhaust / Air mix

Recover cooling energy from Nitrogen Vapour Exhaust / Air mix

(OP)
Does anyone know of a way to recover the cooling energy from a liquid nitrogen vapour / air mix coming out of a Liquid Nitrogen freezing process?  The vapour mix is at -80F and flowing at 3000 CFM.  Snow flakes are generated at the fan exit on the roof from the moisture in the air from the process room.  A dual exhaust fan set-up is being used because the stainless squirl cage fans do freeze up occasionally.
Goal is to transfer some of this cooling energy to cool an existing room.

RE: Recover cooling energy from Nitrogen Vapour Exhaust / Air mix

You could do it with a multipass heat exchanger.
 A single pass exchanger would leave you with a block of ice on the warm side.
B.E.

The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them.  Old professor

RE: Recover cooling energy from Nitrogen Vapour Exhaust / Air mix

how about drawing some of the air at -80 off and mixing with some ambient air to get it to a reasonable temp then run it through a heat exchanger into your system?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources