[Equest-users] Review Comment - Equipment capacities fortheProposed
Nick Caton
ncaton at smithboucher.com
Thu Oct 6 09:32:56 PDT 2011
Omar,
By extension, you'll want to watch for any changes in your proposed
model's underheated/undercooled hours. eQuest makes generally sensible
assumptions regarding occupancies, internal loads and scheduling - but
these do not always agree with the HVAC designer's calculations and can
result in fairly different heating/cooling requirements for some spaces.
For this and future LEED modeling, you should plan on incorporating some
degree of QC between the load calculations used for equipment sizing and
your model's inputs, to avoid excessive undercooled/heated hours.
If you reach this stage of QC at an early enough stage of design (i.e.
before 100% documents), eQuest models can serve as a QC check for the
HVAC design as well, bringing to light loads/ventilation
requirements/etc... that were not considered in earlier HVAC equipment
sizing.
Also, since your reviewer is definitely going to be looking for matching
airflows on your resubmittal - remember to pay close attention to the
effects of site elevation within eQuest and take that into account when
entering scheduled capacities. Plenty of discussion in the archives.
Good luck!
~Nick
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
Kushagra Juneja
Sent: Thursday, October 06, 2011 4:37 AM
To: 'Omar Katanani'; 'eQUEST Users List'
Subject: Re: [Equest-users] Review Comment - Equipment capacities
fortheProposed
Hi Omar,
The Proposed Case should be entered as designed in eQuest. The default
values of eQuest can be used if there is no specific design available.
However, if the design is available the values should match in all the
design documents and the model. Rerunning is a good choice, I guess.
Providing a narrative to explain any revisions is always a good call.
Cheers
Kushagra Juneja
Project Engineer
Kamal Cogent Energy Private Limited,
1st Floor, Kamal Ratan Chambers
Opposite GPO, Jaipur- 302001
Rajasthan, India
Ph: +91-9602332434
P Please consider the environment before printing this e-mail
________________________________
From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Omar
Katanani
Sent: Thursday, October 06, 2011 1:39 PM
To: eQUEST Users List
Subject: [Equest-users] Review Comment - Equipment capacities for
theProposed
Dear all,
I have received the following LEED design review:
"Mechanical drawings with equipment schedules (M-04, M-05, and M-06)
with the heating and cooling pumps, boiler, chiller, and cooling tower
schedules have been provided. However, the scheduled flows and
capacities are inconsistent with those reported in the Table 1.4.3 in
the spreadsheet.
Please revise the Proposed model to reflect the design conditions
(including all capacities, flows, controls, and setpoints), revise the
form and spreadsheet as required to reflect any changes, and provide
reports or screen captures to confirm the changes made."
My impression was that we don't have to enter the capacities / flows (as
per the Mechanical design) in eQUEST, as the program automatically
calculates/sizes these.
The reviewer noticed an inconsistency between Table 1.4.3 (whereby I
filled in the equipment capacities & loop flows from the eQUEST
Simulation Output reports) and the Mechanical schedules.
Shall I rerun my simulations with whatever capacities/schedules provided
by the Mechanical Engineers?
Thanks,
Omar
Please note that EcoConsulting is holding a new series of eco-seminars
on Green Building & LEED GA Training in November.
More information available at:
http://ecoconsulting.net/www/Seminar_Series_Lebanon_Nov11.htm
<http://ecoconsulting.net/www/Seminar_Series_Lebanon_Nov11.htm>
___________________________
Omar Katanani
Sustainable Design Engineer
Email: omar at ecoconsulting.net
EcoConsulting (Lebanon)
Nahas Building, 4th floor
4 St-Maron Street / Georges Haddad Avenue
Postal Code: 2028 5806 SAIFI
Beirut, Lebanon
Tel: +961 (0) 1 971 266
Mobile: +961 (0) 3 045 045
EcoConsulting (UK) Ltd
28 Marshalsea Road
London, SE1 1HF
Tel: +44 (0) 207 939 0989
Fax: +44 (0) 207 939 0981
Website: www.ecoconsulting.net <http://www.ecoconsulting.net/>
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