[Trace-users] Campus Chilled Water vs 90.1 Baseline Chiller

Steve Mettlach SMettlach at hga.com
Wed Jan 20 13:00:24 PST 2010


When you are modeling purchased chilled water, you are basically setting
up a chiller with a COP equal to one.  So if you are comparing a
baseline building with a chiller (COP equal to 4.9), you can expect the
purchased chilled water energy to be 4.9 times greater than the
purchased chilled water energy for an equivalent cooling load.

Steve Mettlach



-----Original Message-----
From: trace-users-bounces at lists.onebuilding.org
[mailto:trace-users-bounces at lists.onebuilding.org] On Behalf Of
trace-users-request at lists.onebuilding.org
Sent: Wednesday, January 20, 2010 2:07 PM
To: trace-users at lists.onebuilding.org
Subject: Trace-users Digest, Vol 18, Issue 2

Send Trace-users mailing list submissions to
	trace-users at lists.onebuilding.org

To subscribe or unsubscribe via the World Wide Web, visit
	
http://lists.onebuilding.org/listinfo.cgi/trace-users-onebuilding.org
or, via email, send a message with subject or body 'help' to
	trace-users-request at lists.onebuilding.org

You can reach the person managing the list at
	trace-users-owner at lists.onebuilding.org

When replying, please edit your Subject line so it is more specific
than "Re: Contents of Trace-users digest..."


Today's Topics:

   1. Campus Chilled Water vs 90.1 Baseline Chiller (Snarski, Marty)


----------------------------------------------------------------------

Message: 1
Date: Wed, 20 Jan 2010 13:51:49 -0600
From: "Snarski, Marty" <msnarski at shwgroup.com>
To: <trace-users at lists.onebuilding.org>
Subject: [Trace-users] Campus Chilled Water vs 90.1 Baseline Chiller
Message-ID:
	<078AC5207CEDE145A8C7C74FFB3975A070F783 at DALEXC1.shwgroup.com>
Content-Type: text/plain; charset="us-ascii"

Hello, all.

 

I'm working on a DD-level Energy Model, and am having some trouble with
the results.

 

My Design Building will use campus chilled water, and campus steam.
I've modeled those per the instructions in the TRACE User Manual.

 

My Baseline Building is a System 7, and is therefore modeled with a
chiller (screw-chiller >150, <300 tons), and a boiler.

 

The overall cooling loads for the  two alternatives are:

Baseline: 548.1 tons

Design: 393.1 tons

 

On the PRM Summary, however, the Space Cooling energy is coming up at:

Baseline: 765.0 (10^6 Btu/yr)

Design: 3659.7 (10^6 Btu/yr)

 

It seems to me there should be an energy savings with chilled water,
over the chiller.  At any rate, it seems strange to me that there'd be
an increase of Cooling Energy of 5 times, to meet a smaller load.

 

Might anyone have any suggestions?

 

Thanks!

 

 

Martin Snarski   LEED(r) AP 
Mechanical Engineer 



 



NOTICE:
This e-mail transmission is intended only for the use of the individual
or entity named above and may contain information that is confidential,
privileged, and/or exempt from disclosure under applicable law. If you
are not the intended recipient, you are hereby notified that any review,
disclosure, copying, distribution, or other use of any of the
information contained in this transmission is strictly prohibited. If
you have received this transmission in error, please immediately notify
the sender by e-mail at the above address and delete it from your
computer system; you should not copy the message or disclose its
contents to anyone. The content of the message and or attachments may
not reflect the view and opinions of the originating company or any
party it is representing.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.onebuilding.org/pipermail/trace-users-onebuilding.org/atta
chments/20100120/d919ff16/attachment.html>

------------------------------

_______________________________________________
Trace-users mailing list
Trace-users at lists.onebuilding.org
http://lists.onebuilding.org/listinfo.cgi/trace-users-onebuilding.org


End of Trace-users Digest, Vol 18, Issue 2
******************************************





More information about the Trace-users mailing list