[Equest-users] Review Comment - Equipment capacities fortheProposed

Nick Caton ncaton at smithboucher.com
Thu Oct 6 09:32:56 PDT 2011



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


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!








Smith & Boucher Engineers

25501 west valley parkway, suite 200

olathe, ks 66061

direct 913.344.0036

fax 913.345.0617



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


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.




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
Sent: Thursday, October 06, 2011 1:39 PM
To: eQUEST Users List
Subject: [Equest-users] Review Comment - Equipment capacities for


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?





Please note that EcoConsulting is holding a new series of eco-seminars
on Green Building & LEED GA Training in November. 

More information available at:




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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