Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question
1

Performance curve of Fan:ZoneExhaust

asked 2022-07-21 21:38:44 -0500

Keigo's avatar

I modelled a Fan:ZoneExhaust object. I used EMS and made the airflow variable by linking with a variable volume supply fan. The simulation result shows that the airflow rate and electricity of Fan:ZoneExhaust became variable, but what performance curve is this fan electricity based on?

Unlike Fan:SystemModel and Fan:Variable, Fan:ZoneExhaust does not have an input field of Electric Power Function of Flow Fruction Curve Name.

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted
1

answered 2022-07-24 11:43:35 -0500

As described in the Engineering Documentation, "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." So the electricity usage is simply calculated as: FanPower = VolumetricFlowRate * PressureRise / TotalEfficiency.

edit flag offensive delete link more

Comments

Thank you for your answer. Then, FanPower is directly proportional to FlowRate becuase PressureRise and TotalEfficiency are considered constant values in this object.

Keigo's avatar Keigo  ( 2022-07-24 12:26:31 -0500 )edit

Your Answer

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

Add Answer

Training Workshops

Question Tools

1 follower

Stats

Asked: 2022-07-21 21:38:44 -0500

Seen: 170 times

Last updated: Jul 28