Question-and-Answer Resource for the Building Energy Modeling Community
Get s tarted with the Help page
Ask Your Question
4

outside air control for four pipe fan coil with inlet side mixer and DOAS

asked 2019-07-09 13:33:11 -0500

xchen gravatar image

updated 2019-07-09 16:30:09 -0500

Does the OS:AirTerminal:SingleDuct:InletSideMixer provide any outside air control for the zone?

I'm trying to model a DOAS system with four pipe fan coils and osa/return air mixing before supply to the fan coils, using this configuration.

image description

When I check the primary airflow for the inlet mixer, it does not seem to control for minimum outside air for the zone.

The four pipe fan coil object only provide maximum osa input and schedule.

image description

My question is how can I model the system to make sure that the DOAS unit delivers minimum required outside air cfm to the zone? I'm using the latest openstudio v2.8.1.

Energyplus documentation shows there's a "Design Specification Outdoor Air Object" field and "Per Person Ventilation Rate Mode" field. But no input shown in openstudio.

image description

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted
2

answered 2021-06-08 11:10:46 -0500

This is being addressed in https://github.com/NREL/OpenStudio/pu.... Two new fields are added:

  • Control For Outdoor Air [Yes/No]: if set to 'Yes' (default since this is a an object that inherently meant for outside air), it will automatically populate the E+ "Design Specification Outdoor Air Object Name" field (by looking at the ThermalZone it connects to and its spaces).
  • Per Person Ventilation Flow Rate Mode: same as the E+ field.
edit flag offensive delete link more

Your Answer

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

Add Answer

 

Question Tools

2 followers

Stats

Asked: 2019-07-09 13:33:11 -0500

Seen: 237 times

Last updated: Jun 18