[Equest-users] chiller staging based on time

[Byron Burns]

Hello Edmund,

 

Yes, you can stage the chillers in eQUEST according to the described
building control strategy.  To do this you will need to use both the
equipment controls and Load management controls in the detailed edit
mode.  

 

The first step would be to set an Flag schedule that defines the hours
of operation of one of the chillers.  Since it sounds like they do not
run at the same time you could get by with creating only one schedule.
Set the flag to 1 when your chosen chiller is operating and 0 when it is
off.

 

Assign that schedule to the Equipment Control Schedule of the Load
management control.

 

 

 

 

Create a separate equipment control for each chiller

 

 

 

 

 

 

Set the equipment control you want to be on when the schedule is 0 in
Seq 1

 

 

 

Set the equipment control you want to be on when the schedule is 1 in
Seq 2

 

 

 

 

I hope that helps,


Byron D. Burns, EIT, BEMP 
Energy Analyst/ Modeler 

H&A Architects & Engineers | www.ha-inc.com <http://www.ha-inc.com>  




From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of E Wong
Sent: Sunday, August 11, 2013 7:13 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] chiller staging based on time

 

Hello fellow eQuest modeller,

 

I am trying to model an existing building that stages chiller based on
time and not load.  The building has a big chiller (~1000 ton) that runs
during day time and a small chiller (~200 ton) at night.  I want to
ensure the model use the big chiller during day time even when the
cooling load is low.

 

Is there any smart way in eQuest to model this?  Or am I better off just
removing the small chiller completely and use spreadsheet to
post-process the efficiency during night time?

 

Thanks,

Edmund

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