[Bldg-sim] EE4: Boiler/Cooling Tower Set Points, and Max Heating COP

[Justin Elkin]

Thank you Robert and everyone else for your replies.

 

Robert, The program that I am using is EE4 and it does seem that the boiler
set point must be below the cooling tower set point. 

 

  Justin Elkin, LEED® Green Associate

  Mechanical Engineer-In-Training



  t: (902) 422-7393

  f: (902) 423-4945

  e: jelkin at mreng.ca

 

  _____  

From: RobertWichert [mailto:robert at wichert.org] 
Sent: Thursday, April 12, 2012 4:26 PM
To: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] EE4: Boiler/Cooling Tower Set Points, and Max
Heating COP

 

What software are you using, Justin?  I have seen EnergyPro require the
cooling tower minimum water temperature to be above the boiler setpoint.
This might be correct for a water source heat pump system, but I don't think
it is correct for a hot water reheat system, for instance.  I have never
been able to get EnergySoft to tell me why this limitation exists.

You may have a different situation, but I have seen that error in EnergyPro.





Robert Wichert P.Eng. LEED AP BD&C
+1 916 966 9060
FAX +1 916 966 9068
 
 
 
 
 
 
 
===============================================


On 4/12/2012 12:00 PM, Justin Elkin wrote: 

Hello All,

 

I had a couple questions that I was hoping someone could clear up for me.

 

1)      Boiler and Cooling Tower Set points: The boiler set point states its
range from 32 °F – 100 °F. But the program will not run if the set point is
over 65 °F. Has   anybody encountered this before? Is this normal or should
I be able to have a higher value? For the cooling tower, is there a place
where I can input the set points?

 

2)      Max Heating COP: In the building tree under the Zone Level and in
the Mechanical Tab I can set the heating COP. It says in the EE4 Help Guide
that I should be able to set this value as high as 10. But the program will
not let me input anything higher than 8. Again, is this normal and has
anyone else experienced this? I am trying to model a hybrid heat pump;
therefore I would like to input the highest COP possible. 

 

Please let me know if anyone can shed some light on the issues I’ve
expressed above. Thank you in advance.

 

Cheers,

 

  Justin Elkin, LEED® Green Associate

  Mechanical Engineer-In-Training



  t: (902) 422-7393

  f: (902) 423-4945

  e: jelkin at mreng.ca

 






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