[Bldg-sim] How the get the "estimated load profile"?

[Dennis Knight]

If your client actually meters the chilled water usage at the buildings and
allocates the charges to each facility for the cost of producing chilled
water you can use that information and just set the model up in baseline
and proposed building like any other metered utility with a cost per btu,
Kbtu, ton-hours, etc. There would be no need to model a central plant at
all in this case.
I believe the rule is that the proposed building has to be less than 50% of
the load on the central plant. You would need to verify that in the LEED
documentation.

On Wednesday, April 17, 2013, James Hess wrote:

>  I would agree with that.****
>
> ** **
>
> I would recommend informing your client that you can either do Option 1 of
> the USGBC DESv2.0 guidelines (i.e. plants modeled as neutral between
> baseline and proposed via stipulated rates), or using the stipulated
> efficiencies for Option 2.****
>
> ** **
>
> Otherwise, I would recommend informing your client that modeling the
> entire district system just to estimate the plant efficiencies (i.e.
> includes buildings outside the scope of the current project), with the goal
> of getting more EAc1 points for the project, will result in you asking for
> additional fee because this is additional work on your part, potentially a
> lot of additional work.  I think this is a very reasonable approach. ****
>
> ** **
>
> Regards,****
>
> * *
>
> *JAH*
>
> * *
>
> *James A. Hess, PE, CEM, BEMP*
> Energy Engineer
> TME, Inc.
> Little Rock, AR****
>
> Mobile: (501) 351-4667****
>
> ** **
>
> *From:* equest-users-bounces at lists.onebuilding.org <javascript:_e({},
> 'cvml', 'equest-users-bounces at lists.onebuilding.org');> [mailto:
> equest-users-bounces at lists.onebuilding.org <javascript:_e({}, 'cvml',
> 'equest-users-bounces at lists.onebuilding.org');>] *On Behalf Of *David
> Griffin
> *Sent:* Tuesday, April 16, 2013 3:21 PM
> *To:* 'Esmireta'; BLDGSIM; equest-users
> *Subject:* Re: [Equest-users] How the get the "estimated load profile"?***
> *
>
> ** **
>
> Esmireta,****
>
> ** **
>
> It has been awhile since I modeled a central plant for a LEED project, so
> you’ll have to verify my comments.****
>
> ** **
>
> After applying a CHW meter and a Steam Meter to your CHW Loop and HW Loop
> respectively, a new Central Plant can be modeled in either of the following
> ways:****
>
> ** **
>
> **1)    **Using efficiencies per section 2.4.1.2.3 *Default Efficiencies*and applying them to your meters, or
> ****
>
> **2)    **Using efficiencies per the design specifications and applying
> them to your meters.****
>
> ** **
>
> I don’t remember ever seeing a ‘process load’ that must be applied to the
> plant. I’m sure some else will chime in a correct me if I’m wrong. Have a
> great day!****
>
> ** **
>
> Thanks,****
>
> * *
>
> *David Griffin*
>
> Energy Analyst****
>
> ETC Group, LLC****
>
> 801.278.1927 ext. 128****
>
> Cell 480.235.0899****
>
> Fax 801.486.0668****
>
> dgriffin at etcgrp.com <javascript:_e({}, 'cvml', 'dgriffin at etcgrp.com');>***
> *
>
> ** **
>
> [image: Copy of ETC_LogoOnly2_rgb_sm.png]****
>
> 1997 South 1100 East, Suite 201, Salt Lake City, UT 84106-4471 –
> www.etcgrp.com****
>
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>
> *From:* Esmireta [mailto:e2fye2 at 163.com <javascript:_e({}, 'cvml',
> 'e2fye2 at 163.com');>]
> *Sent:* Monday, April 15, 2013 7:49 PM
> *To:* BLDGSIM; equest-users
> *Subject:* [Equest-users] How the get the "estimated load profile"?****
>
> ** **
>
> Dear all,****
>
> When simulating district cooling for LEED, a virtual plant is required to
> be added to the proposed building, according to the "Treatment of District
> or Campus Thermal Energy in LEED V2 and LEED 2009 – Design & Construction".
> ****
>
> The efficiency of the virtual plant is obtained through modeling if the
> district cooling system is new.****
>
> The "Treatment of District or Campus Thermal Energy in LEED V2 and LEED
> 2009 – Design & Construction" said, "Apply measured or estimated load
> profiles as “process loads” to reflect the estimated total loads on the
> district energy plant".****
>
> My question is:****
>
> What is the estimated load? If the district cooling system provides cold
> to any other buildings that are not in the LEED certificate scope, how can
> I get the estimated load? ****
>
> Regards,****
>
> Esmi****
>
> ** **
>


-- 
M. Dennis Knight, P.E.
Founder & CEO
*W*hole *B*uilding *S*ystems, LLC
P.O. Box 1845
Mt. Pleasant, SC 29465
Phone: 843-437-3647
Email: dknight at wholebuildingsystems.com
Website: www.wholebuildingsystems.com
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