Could a presure deferential sensor used as outdoor air monitoring devise?. It is a DOAS with diferential presure sensor wich will control the speed fan in order to deliver the same outdoor air when the filter gets old and the the presure increased.
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Andrew Mitchell, P.E.
PrincipalMitchell Gulledge Engineering, Inc.
LEEDuser Expert
126 thumbs up
May 2, 2016 - 3:31 pm
This is not an acceptable solution for a variable volume system. If you are using a constant volume system, you may use a system status as a monitor.
TOMAS URIBE
PROJECT MANAGERSOLUCIONES ENERGETICAS SOSTENIBLES
9 thumbs up
May 3, 2016 - 9:26 am
Hi Andrew, it is a constant volume system. The diferential pressure sensor and the VRF adjust the fan speed in order to mantain the same cfm. As the filter gets dirty the pressure will increase and the fan will speed up to maintain the same air flow.
Andrew Mitchell, P.E.
PrincipalMitchell Gulledge Engineering, Inc.
LEEDuser Expert
126 thumbs up
May 3, 2016 - 12:41 pm
Just use the VFD status to comply with the credit.
Brightworks Sustainability
Brightworks Sustainability LLC47 thumbs up
July 22, 2016 - 3:40 pm
Hi Andrew,
So a project can use the VFDs to monitor fan status (at 100% outside air at constant volume) and not have to include CT monitors? Thanks
Andrew Mitchell, P.E.
PrincipalMitchell Gulledge Engineering, Inc.
LEEDuser Expert
126 thumbs up
July 22, 2016 - 4:23 pm
If it is a constant volume system, the VFD has a CT built in for status.