Question-and-Answer Resource for the Building Energy Modeling Community

Get started with the Help page

2

Zone Exhaust Fan Motor Heat

asked 2015-12-03 15:25:22 -0600

SVVitale
433 ●1 ●9

updated 2015-12-03 15:39:06 -0600

flag of United States of America

4446 ●5 ●17 http://bleedinggreenna...

Does anyone know if the motor heat for a Fan:ZoneExhaust goes directly into the zone, into the exhaust airstream, or if it is a throw-away load used only for electrical loading? It seems like there should be a way to dictate where the motor heat should go. I am hoping that it is NOT getting added into my zones as a cooling load because in reality my exhaust fans are outside the building on the roof and the motor is outside the exhaust airstream too so I would not want that motor heat to warm up my exhaust air either in the model since I want to accurately model heat recovery.

edit retag flag offensive close merge delete

1 Answer

Sort by » oldest newest most voted

3

answered 2015-12-03 16:31:43 -0600

Chris Jones
1109 ●1 ●6

From the Engineering Reference: "The exhaust fan model is similar to, but simpler than, the models used for air system fans. The electric power calculation is simplified and uses a constant overall efficiency. All of the fan power is added to the air stream."

edit flag offensive delete link

Comments

As a program enhancement, it would be nice if there was a field or two to specify where the heat should go.

SVVitale ( 2015-12-03 18:24:11 -0600 )edit

Suggest it here

aparker ( 2015-12-03 18:25:33 -0600 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Training Workshops

Careers

Question Tools

1 follower

Stats

Asked: 2015-12-03 15:25:22 -0600

Seen: 137 times

Last updated: Dec 03 '15

Site design and logo: Copyright © 2015 Big Ladder Software LLC. All rights reserved.
The Unmet Hours and Big Ladder names and logos are trademarks of Big Ladder Software LLC.
User contributions licensed under the Creative Commons Attribution Share Alike 3.0 License.

Powered by