[Equest-users] Waterside Economizer

Sethi, Amarpreet amarpreet.sethi at stantec.com
Mon Jun 28 15:22:09 PDT 2010


Varkie,

 

You need the water economizer –

 

"water economizer" = CHILLER         

   TYPE             = WATER-ECONOMIZER

   CHW-LOOP         = "Chilled Water Loop"

   CHW-PUMP         = "WE pump"

   CW-LOOP          = "Condenser Water Loop"   ..

 

 

And a pump attached to the water economizer –

 

"WE pump" = PUMP            

   CAP-CTRL         = VAR-SPEED-PUMP

   ..

 

Along with the chilled water loop and a condenser water loop.

 

I think the problem you are facing may be due to the 42deg temperature input.

 

Hope this helps.

Amarpreet

 

From: Varkie C Thomas [mailto:thomasv at iit.edu] 
Sent: Monday, June 28, 2010 10:08 AM
To: Varkie C Thomas
Cc: Jonathan Smith; Sethi, Amarpreet; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Waterside Economizer

 

I am having a hard time getting �Chiller Type = Waterside Economizer� to work in eQ.  I received 2 messages recommending this as the solution.  I have 2 more saying that they have not been able to model WSE in eQ.  Please let me know if it is not supposed to work.  

 

Unlike DOE2.1E this is the only minimum input required in eQ.  In this project during WSE operation we require a Clg-Twr leaving temp (Plate & Frame HX entering temp) of 42F so that the CHW temp leaving the HX is 44F or 46F.  The eQ default is 85F.  Even with this default and �Chiller Type = Waterside Economizer� I get the error message �Condenser Water Loop has Zero Design Flow�.

 

Unlike DOE2.1E there is no way of attaching a schedule for WSE operation.  I have attached eQ input-output �Without-WSE-1� and �With-WSE-2�; DOE2.1E definitions of WSE commands and keywords;  a sample DOE2.1E plant section input showing WSE; a schematic of Plate & Frame HX; and my eQ input for WSE and the resulting error message.  The attached project is dummy to test eQ for WSE.

 

Has anyone modeled WSE with eQ?  WSE works with DOE2.1E commands and keywords.  Does Waterside Economizer work with EnergyPlus (this project is also going to be modeled with E+ using Design-Builder interface for building and systems), TRACE or HAP

 

Varkie

 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20100628/6e445af2/attachment-0001.htm>


More information about the Equest-users mailing list