[Equest-users] How to turn off hot water loop and how to make aFCU+DOAS system simulation

[tsea2005]

Hi Rob Hudson,
                 First thanks for your reply. I followed you advice that set the snap temp to 120, and there is no heating load, I made it .
                  But for the DOAS system ,as you said that the dummy space doesn't need to have walls or loads,I created a new floor named dummy floor using a box with 1ft width ,1ft depth and 1ft floor-floor.Then in the dummy floor ,I created a child space named dummy space with box-shaped,1ft width ,1ft depth. After this ,I created a new HVAC system named DOAS system , that is SZRH.Here is the problem:the DOAS system's "control zone" dose't include the dummy space defined ealier,as the chart showed below, So I have to cancel. 

2010-04-20 



The simulation can't run ,then I checked the building description，it turned out as the chart showed below:
 
I do know that I have misunderstood the method definfying the dummy space ，what is the correct one？I’ve attached my INP and PD2 files.


2010-04-21 



tsea2005 



发件人： Rob Hudson 
发送时间： 2010-04-19  22:07:20 
收件人： Grando, John 
抄送： tsea2005; equest-users at lists.onebuilding.org 
主题： Re: [Equest-users] How to turn off hot water loop and how to make aFCU+DOAS system simulation 
 
you can keep the heating and hot water in the model, and simply use "non heating" thermostat schedules that will allow the space to be satisfied without turning on the hot water coils.  also in the hot water loop there is a snap temperature.  set this to 120 or something high and the boilers and attached equipment will never turn on.  

also for the DOAS system with FCU equipment.  i have done exactly that and gotten good results.  Start by setting all your FCU systems to have OA-FROM-SYSTEM to the DOAS system and make sure that the DOAS system is attached to a "dummy space."  this space doesn't need to have walls or loads, just 1sqft of space and the correct thermostat schedules and it should work just fine.


2010/4/19 Grando, John <JGrando at cosentini.com>

You can just select it as it is and then remove it in Detailed edit or set the heating level to something extremely low (55F).


John Grando LEED AP| Mechanical Engineer

  





From: tsea2005 [mailto:tsea2005 at 163.com] 
Sent: Saturday, April 17, 2010 2:56 AM

To: equest-users at lists.onebuilding.org

Subject: [Equest-users] How to turn off hot water loop and how to make a FCU+DOAS system simulation



Hi all:
       I am simulating a building which dosen't need heating via FCU,but in eQuest's air-side system,there is the  4-pipe Fan coils with HW heat.  I don't need heating so how can i turn off the heat water loop in detailed interface mode？

     Another question is HOw to service the whole building with both FCU and DOAS?

Thank you so much!
2010-04-17 



tsea2005 


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-- 
Rob Hudson
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