[Equest-users] 答复: what's the default equipment control?

[John Aulbach]

Joey:

For your "default" case, you will note chiller-1 and chiller-2 total runs hours total 2750 hrs. I would check if you are shutting off chiller -1 and going to chiller-2 for some reason. i would have thought it to be as i originally surmise (i.e., sharing the load at each junction).



________________________________
 From: "Jiao, Joey" <Joey.Jiao at WSPGroup.com.cn>
To: John Aulbach <jra_sac at yahoo.com>; Equest-users at lists.onebuilding.org 
Sent: Wednesday, March 21, 2012 11:48 PM
Subject: 答复: [Equest-users] what's the default equipment control?
 

Hi John & everyone:
Thank you for your helps , I just check that, but it seems different than we thought. 
The PS-H report show the chiller water loop run hours. I add it in the form, so you can get it clear.
Equipment control Chiller 1a Chiller 1b Chiller 1c Chiller Water Loop 
None 2126 624 607 2750 
Chiller1~3 to seq 1~3 2750 607 0 2750 
All Chillers seq 1 2750 2750 2750 2750 
Now you can find that , the loop run hours for all control types is 2750. 
If the default control type as we thought , the chiller 1a should be 2750 equal tothe run hours of  Chiller Water Loop, because in any situation , the chiller 1ashould first and always be used. 
Maybe I think too much. But it is a software , I think there must be a sample and clear way for the default control. 
Thank you for your help again. 
 
Joey 
 
 
发件人:John Aulbach [mailto:jra_sac at yahoo.com] 
发送时间: 2012年3月22日 13:20
收件人: Jiao, Joey; Equest-users at lists.onebuilding.org
主题: Re: [Equest-users] what's the default equipment control?
 
Joey:
 
I am guessing, but I BELIEVE Chiller-1 gets to a certain load (think it's defined in the chiller setup), then Chiller-1 and Chiller-2 share the load until Chiller-3 is needed, when all three share the load.
 
See if that makes sense.
 
John Aulbach
Partner Energy
 

________________________________

From:"Jiao, Joey" <Joey.Jiao at WSPGroup.com.cn>
To: Equest-users at lists.onebuilding.org 
Sent: Wednesday, March 21, 2012 7:49 PM
Subject: [Equest-users] what's the default equipment control?
 
Hi, everyone:
What’s the default equipment control when a loop with more than 1 plant?
At first I think the default should be” chiller1a- sequence 1, chiller 2a-sequence2, …” or all the chillers with the same sequence 1.
But my experiment shows it different than my think . 
 I make a system with 3 chiller and make a calculation under different control way.
The result run hour shows below:
Equipment control Chiller 1a Chiller 1b Chiller 1c 
None 2126 624 607 
Chiller1~3 to seq 1~3 2750 607 0 
All Chillers seq 1 2750 2750 2750 
So I’m puzzled with how should the software control more than 1 plant when there is no equipment control set?
Any suggestion should be appreciated.
Thank you very much. 
 
Joey

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