[Equest-users] eQuest - Campus Steam

[Robby Oylear]

Kevin,

You should read the DES modeling guidelines that Daniel referenced.  There
are two options on how you choose to model the district utility system.  If
you choose to model it as a simple purchased steam meter, then you are
limited to a maximum amount of points under EAc1. Conversely, if you choose
to model the entire steam plant from source to site, you have to show a
minimum of 6 points.

Refer to Table 1 on page 10 of the DES guidelines.

Robby Oylear, LEED AP

*Mechanical Project Engineer*

*Senior Energy Analyst*

* *

*D* 206-788-4571

*www.rushingco.com* <http://www.rushingco.com/>

On Wed, Mar 14, 2012 at 2:26 PM, Kevin Kyte <KKyte at watts-ae.com> wrote:

> Daniel, that is curious that purchased steam would limit the number of
> EACr.1 points.  Is that in your theory or from something more concrete?  Or
> does it relate to DES modeling?  I had this issue with a cogeneration
> project that was inaccurately sized for the demand and resulted in
> (according to calcs) less efficient operation than the minimum required
> baseline.  Unfortunately the project was unable to meet the prerequisites
> for energy performance.****
>
> ** **
>
> Kevin****
>
> ** **
>
> ** **
>
> ** **
>
> *From:* R B [mailto:slv3sat at gmail.com]
> *Sent:* Wednesday, March 14, 2012 10:57 AM
> *To:* Daniel Knapp; equest-users at lists.onebuilding.org
>
> *Subject:* Re: [Equest-users] eQuest - Campus Steam****
>
> ** **
>
> You could just apply a steam meter.****
>
> On Wed, Mar 14, 2012 at 9:54 AM, Jim Paulino <jim.paulino at hesm.com> wrote:
> ****
>
> 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****
>
> ** **
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> Arborus Consulting****
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> Energy Strategies for the Built Environment****
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> www.arborus.ca****
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> 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.*****
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