[Equest-users] EMS Control System Modeling

[MatthewRLarson at Eaton.com]

Charles,

 

Regarding the DCV, you need to specify the "Minimum OA Control Method"
under the Outdoor Air tab for the system to state whether the CO2 sensor
is in the return or in the space.  Then at the zone level, specify the
"Minimum Flow Control" under the Air Flow tab to state if the minimum OA
resets up or down depending on occupancy level.  To ensure the amount of
OA going into a space doesn't go below the ASHRAE 62.1 minimum, I always
input the OA Flow per Person and/or Flow per Area at the zone level as
well.  DCV has always been something I've been a little dicey about so
any additional suggestions/comments would be great.

 

Thanks,

 

Matthew Larson, LEED AP BD+C
Project Engineer

Energy Solutions Group

E M C Engineers, Inc.
Eaton's Electrical Services & Systems 
143 Union Blvd, Suite 350
Lakewood, CO 80228
tel: +1 303 328-3419
mobile: +1 303 668-2511
fax: +1 303 974-1239

MatthewRLarson at Eaton.com 
www.eaton.com/energysolutions  

 

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Greg
Collins
Sent: Tuesday, March 08, 2011 5:53 PM
To: Charles Welch; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] EMS Control System Modeling

 

Charles - A quick suggestion for the setback is to try setting your
system fans to "cycle on any."  Otherwise, your system might not kick on
to maintain setback temperatures. 

 

Greg Collins
GLUMAC | (949) 833-8190

 

From: Charles Welch [mailto:cwelch at capitalreviewgroup.com] 
Sent: Tuesday, March 08, 2011 4:24 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] EMS Control System Modeling

 

I am doing an quick estimate for adding EMS control to an existing HVAC
system (schools) which incorporate the following measures

 

1)    Automatic thermostat setbacks for building occupation

2)    Demand controlled ventilation

3)    Economizers

 

Here are my "challenges"
1)    Simulation with setback temperatures shows no reduction in energy

2)    I am unsure how to handle DCV

3)    Simulation with economizers show very little reduction

 

I would appreciate any pointers, suggestions, etc. on what to do here.

I would especially appreciate any example files to see how you input the
data to get proper results.

 

 

Thanks in advance for any help.

  

 

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