[Equest-users] LEED system 5

Sami, Vikram Vikram.Sami at perkinswill.com
Tue Jun 5 08:13:03 PDT 2012


1.       Make sure your systems are set to cycle on any

2.       Make sure you have your reheat Delta T Set correctly.

This should take care of the problem - otherwise its probably something more sinister.


Vikram Sami, LEED AP BD+C
Sustainable Design Analyst
1315 Peachtree St. NE, Atlanta, GA 30309
t: 404-443-7462    f: 404.892.5823       e: vikram.sami at perkinswill.com   www.perkinswill.com<http://www.perkinswill.com/>
Perkins+Will.  Ideas + buildings that honor the broader goals of society


From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Nick Caton
Sent: Tuesday, June 05, 2012 10:57 AM
To: Howe, Timothy; Matt Clough; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] LEED system 5

Unmet heating hours will probably go away once you get your heating operational.  I'd caution against internally justifying/rationalizing one set of unmet hours with another - keep in mind unmet hours are an indicator/symptom of a problem, not a problem in and of themselves.

For HW consumption, open both models and review the DHW loop, schedules, process loads, and equipment.  Generally everything should be identical excepting HW heater efficiency inputs.

Reheat coils are set up at the terminal units (zone inputs).  Those relying on wizards can easily miss some required edits to make reheat operate correctly - see attached discussion from the [Bldg-sim] archives for a recap.

~Nick


[cid:image001.jpg at 01CD430C.2C925AF0]

NICK CATON, P.E.
SENIOR ENGINEER

Smith & Boucher Engineers
25501 west valley parkway, suite 200
olathe, ks 66061
direct 913.344.0036
fax 913.345.0617
www.smithboucher.com

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Howe, Timothy
Sent: Tuesday, June 05, 2012 9:26 AM
To: Matt Clough; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] LEED system 5

Post the .pd2 and .inp file for this project and we may be able to help you better.

Timothy Howe, MS, LEED® AP BD+C
Mechanical Engineer
Stantec
61 Commercial Street
Rochester NY 14614
Ph:   (585) 413-5347
Fx:   (585) 272-1814
Cell: (585) 330-8681
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From: equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org> [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Matt Clough
Sent: Tuesday, June 05, 2012 10:24 AM
To: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: [Equest-users] LEED system 5

Salutations!

I just completed a LEED model, but after reviewing the data results, I think something is wrong.

The baseline building is showing no energy used for space heating, heat rejection, and service water heating.  I have the 2 boilers modeled, per G3.1.3.2.  This sort of makes sense because the model was showing high unmet heating hours, while the proposed building had had unmet cooling hours (successfully resolved).

I set up the system 5 equipment (Packaged VAV with reheat) in the wizard, but it doesn't seem to show a heating component in the DDE.  I'm going to keep looking, but wanted to see if someone could point me in the right direction.

Regards,
Matt Clough
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