[Equest-users] User Expressions in Schedules eQuest

[Joel Travis]

Todd,

 

This may be more than you bargained for but here is some sample INP code
that will achieve what you're looking for:

 

**

$ ---------------------------------------------------------

$              Global Parameters

$ ---------------------------------------------------------

 

PARAMETER

   "setback_hr"   = 6  ..

 

$ ---------------------------------------------------------

$              Day Schedules

$ ---------------------------------------------------------

" Sample_Cool_SB" = DAY-SCHEDULE-PD

   TYPE             = TEMPERATURE

   VALUES           = ( 

{if(0> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(1> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(2> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(3> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(4> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(5> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(6> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(7> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(8> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(9> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(10> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(11> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(12> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(13> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(14> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(15> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(16> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(17> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(18> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(19> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(20> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(21> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(22> parameter("setback_hr")) then 72 else 80 endif}, 

         {if(23> parameter("setback_hr")) then 72 else 80 endif} )

   ..

 

This allows the schedule "Sample_Cool_SB" to be linked to whatever week and
annual schedule and it sets the daily hours less than 6am to be 80F and the
daily hours greater than 6am to be 72F.

To add an ending condition (reset back to 80 at 8pm), you would need a
second parameter and a second if loop for each hour to achieve this.  

 

*Note - if you don't feel like touching the *.inp file, manually add the
parameter and then add each if statement to the respective hours in the day
schedule you want to change.

 

Cheers,

 

Joel Travis, LEED AP

Project Engineer

781-769-8773

1408 Providence Hwy

Norwood, MA 02062

joel at andelmanlelek.com

 

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Todd Lagus
Sent: Monday, February 23, 2009 12:44 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] User Expressions in Schedules eQuest

 

Is there a way to modify day schedules using global parameters.  For
example, say I want to compare the difference between having a setback start
at 6 pm instead of 10 pm.  I know how to create two different schedules and
change them in the parametric run to get the difference.

 

However, let's say I want to use a single schedule to save time if I want to
run many different parametric runs.  In pseudo code, I would say something
like-

 

 

Global parameter - Setback Hour (6 pm or 10 pm)

 

If time < "Setback Hour", then cooling setpoint is 72, else cooling setpoint
is 80

 

There would be a similar code to bring the setpoint back to occupied.

 

Is it at all possible to create a User expression in the schedules that
would to this?  I could not find a keyword that corresponds to a time of
day, so I think this all may be in vain.

 

Thanks,

 

Todd

 

 

Todd Lagus, EIT

Mechanical Engineer

Sebesta Blomberg 
sebesta.com | P  651.634.7236 | F  651.634.7400

 

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