[Equest-users] Water-Side Economizers

[James Hansen]

Just set up a new chiller in your primary chilled water loop, and set it
to type "waterside economizer".  Then create the associated pumps /
power consumption, and eQuest will automatically use this chiller (in
lieu of any powered chillers) whenever there is a possibility for
waterside economizer based on ambient conditions and required
temperature of chilled water loop to meet loads.

 

GHT Limited
James Hansen, PE, LEED AP

Senior Associate

1010 N. Glebe Rd, Suite 200

Arlington, VA  22201-4749

703-338-5754 (Cell)

703-243-1200 (Office)

703-276-1376 (Fax)

www.ghtltd.com <http://www.ghtltd.com/> 

 

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Pasha
Korber-Gonzalez
Sent: Thursday, April 15, 2010 4:46 PM
To: Jeff Ross-Bain
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Water-Side Economizers

 

Jeff,

 

if you have chilled water coils through your unit MZ unit and the
chilled water is coming from a chiller, then the water size economizing
function comes from the cooling tower that is connected to the chiller
which supplies the chilled water coils.  If you are talking about
economizer --in general terms, then maybe you are trying to
air-economize which should be able to be input in the air-side
tab-cooling  for your MZ AHU.

 

Look at the plant & cooling tower for your water econo inputs.

 

Pasha

On Thu, Apr 15, 2010 at 1:40 PM, Jeff Ross-Bain
<jross-bain at rbgreenbuilding.com> wrote:

Hi All,

 

I have an existing building with a multi-zone air handling system with
chilled water and hot water coils. The system consists of the air
handling units, a centrifugal chiller, cooling tower, and gas fired
boiler. I am trying to introduce a water-side economizer into the
system. In the detailed mode, I notice that a water-side economizer is
not allowed with a multi-zone system. The spreadsheet input simply has
an inaccessible "n/a" shown for the economizer and does not allow
access.

 

Am I missing something?

 

Thanks for your help.

 

Jeffrey G Ross-Bain, PE, LEED, BEMP

Ross-Bain Green Building, LLC

404-228-2893

 

P Build Green...Save Time

 

 


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