×
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

Energy Recovery Run Around Loop Sizing

Energy Recovery Run Around Loop Sizing

Energy Recovery Run Around Loop Sizing

(OP)
I need to size a run around coil energy recovery loop to recover heat from a group of fume hoods exhaust ducts and use the energy to preheat my make up air.  Does anyone know of a good design guide or program for sizing the coils and flow rates?  What is the limiting factor on how much energy can be recovered from the exhaust air stream?  Would it be the exhaust air stream dewpoint to prevent coil frost?  What is the recommended delta t across the glycol side?    

RE: Energy Recovery Run Around Loop Sizing

Some good coil design software can be found at:

                   http://www.marlocoil.com

RE: Energy Recovery Run Around Loop Sizing

I think Heatcraft also has run-around coil sizing software
www.heatcraft.com

RE: Energy Recovery Run Around Loop Sizing

If you factor in maintenance & health hazard potential, heat recovery of fume hood exhaust will not be attractive. About 45% to 50% efficiency is what you can get. Then you have to add heat to prevent frosting at low ambient. Include fan & pump power penalty. Make sure you have space for coils & filters. Provide bag in/bag out filters to protect coils.

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