[Equest-users] eQuest - Campus Steam

[Fred Betz]

Jim,

Remove the boilers, and apply a steam meter to the heating hot water loop under the  “plant” tab just like you would add any other piece of equipment.


The use of district energy does not necessarily limit the amount of points you can get, but district energy does add some caveats within LEED. Per Table 1 of “Treatment of District of Campus Thermal Energy in LEED v2 and LEED 2009 – Design and Construction” issued August 13, 2010; Option 1 limits you to 10 points for New Construction or Option 2 does not limit your maximum point score beyond the credit maximum.

Option 2 requires that you model the central plant, which can be very challenging if insufficient information is available. Also, Option 2 comes with a 6 point minimum per Table 1. In other words, your building has to achieve at least 6 points with your building and your plant to use Option 2. If it doesn’t achieve 6 points, you need to use Option 1.

Hope that makes sense.

Fred


Fred Betz  PhD., LEED AP
Sustainable Systems Analyst



AEI | AFFILIATED ENGINEERS, INC.
5802 Research Park Blvd. | Madison, WI  53719

P: 608.236.1175 | F: 608.238.2614
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From: Jim Paulino [mailto:jim.paulino at hesm.com]
Sent: Wednesday, March 14, 2012 9:55 AM
To: Daniel Knapp
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] eQuest - Campus Steam

Hi Daniel,

Thanks for the reply on the LEED requirements. You confirm an issue with having a campus system in that it can limit the potential energy points, but that is another topic...

What I'm not familiar with is how to change the "on-site" boilers that were modeled with a campus steam supply (I have been given a cost per lb of steam by the university), a steam to water heat exchanger and pumps. If anyone can walk me through this or point me in the right direction, I would appreciate that.

Thanks for any help,

Jim
________________________________
From: "Daniel Knapp" <danielk at arborus.ca>
To: "Jim Paulino" <jim.paulino at hesm.com>
Cc: equest-users at lists.onebuilding.org
Sent: Wednesday, March 14, 2012 10:39:01 AM
Subject: Re: [Equest-users] eQuest - Campus Steam

Hi Jim,

Just FYI if this is a LEED model you should check out the District Energy Modelling Requirements from the USGBC (http://www.usgbc.org/ShowFile.aspx?DocumentID=7671).  By modelling as purchased steam you are limiting the number of EAc1 points available.

Cheers,
Dan

—
Daniel Knapp, PhD, LEED® AP O+M
danielk at arborus.ca<mailto:danielk at arborus.ca>

Arborus Consulting
Energy Strategies for the Built Environment
www.arborus.ca<http://www.arborus.ca>
76 Chamberlain Avenue
Ottawa, ON, K1S 1V9
Phone: (613) 234-7178 ext. 113
Fax: (613) 234-0740



On 2012-03-14, at 10:25 AM, Jim Paulino wrote:

I've inherited an energy model that was done over 3 years ago by someone no longer at our firm.
I'm an eQuest novice and have a question about a system that uses campus steam for heating.
The original model was set up with two gas fired boilers. (I see this in the Component Tree tab in the Water-Side HVAC section)
How do I tell eQuest that the heating is from a campus/purchased steam system so that it complies with ASHRAE 90.1-2004 item G3.1.1.1, Purchased Heat which requires the campus utility rate to be used?
Jim Paulino, P.E., CxA, LEED ™ AP

Mechanical Engineer

jim.paulino at hesm.com

HESM&A, Inc.

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


MAIN:

(404) 881-5300

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(678) 365-2199

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