[Bldg-sim] EE4 - Packaged VAV with Fan Powered Boxes

[Brian Tysoe]

Hi,

I am trying to model a packaged VAV rooftop unit with fan-powered boxes in the perimeter zones. After hours the RTU fans are off and the fan-powered boxes cycle to maintain the night setback temperature.

How can I correctly model the fan energy for this system in EE4?

When I select "Packaged VAV" as my system type there is no option to enter any fan energy at the zone level.

What should I use for a fan schedule and what should I put under "Fan Operation" at the system level?

Currently I do not have the terminal fans entered anywhere, just the RTU fans. I am not sure if I am over estimating the fan energy because the RTU fans are cycling to maintain night setback; or if I am under estimating the fan energy because there are no fans operating at night.

Also, if I have an exhaust fan in my RTU in addition to the supply fan and return fan, should I include it with my supply fan or with my return fan?

Thanks,


Brian Tysoe M.A.Sc., P.Eng., LEED AP
Mechanical Engineer

MCW Consultants Ltd. <http://www.mcw.com>
600-156 Front Street West
Toronto, ON M5J 2L6
Phone 416-598-2920
Fax 416-598-5394

This e-mail may be privileged and confidential. Any unauthorized use is strictly prohibited. If you received this e-mail in error, please contact the sender directly.

________________________________
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20101117/645c3043/attachment-0001.htm>