[Equest-users] Interlock combustion air fan with boiler schedule

[Bishop, Bill]

Shawn,
If you select a boiler TYPE of "...w/ draft" you will see default values for the boiler ELEC-INPUT-RATIO and EIR-FPLR curve. This simulates electrical consumption coincident with boiler operation. You could calculate an EIR based on all fan power, controls etc. associated with your boilers. I haven't plotted the default "Draft-Fan-EIR-fPLR" curve so you might take a look at it and make changes based on your particular boiler plant.
Regards,
Bill

William Bishop, PE, BEMP, BEAP, LEED AP | Pathfinder Engineers & Architects LLP
Senior Energy Engineer

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From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Shawn Maurer
Sent: Friday, January 10, 2014 8:59 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Interlock combustion air fan with boiler schedule

Hello eQuest community

I've been using eQuest on a basic to moderate level for a while, and am starting to get into more detailed modeling.

What I have now is a building with boilers in a basement that get fresh air from a 100% OA supply fan.  The fan is interlocked with the boilers so that it only supplies air when the boilers are burning fuel.  The fan also has a hot water coil to keep the air at a minimum temperature to prevent thermal shock of the boilers.

I'm pretty sure I've got the heating figured out, but how do I link the fan schedule to the boiler operation schedule?
An answer to this will definitely help in figuring out interlocking other equipment in eQuest

Thank you all for your help!
Shawn

Shawn Maurer, EIT
Building Energy Specialist
University of Illinois - Urbana Champaign
Smart Energy Design Assistance Center
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