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

[James Hess]

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 [mailto: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<mailto:dgriffin at etcgrp.com>

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From: Esmireta [mailto: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

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