[Equest-users] Multi-Zone Hot Deck supply Flow rate error

[Sundharam, Premnath]

Hello All,

 

Found out what the problem is or at least this is what I think the
problem is. Title 24 does not allow heating and cooling to happen
simultaneously. So when I selected a single fan multi-zone 2 deck
constant volume with hot water loop heat system, there is no way to
enter the Hot deck supply air flow rate. See image below.

 

 

 

 

So I had to change the system to have DUAL FAN under DUAL DUCT TYPE
(even though my system has only one fan) and now I was able to enter
heating supply flow. See image below. Now the error is gone!

 

 

 

So I believe, in concept this is a work around in eQuest to model THREE
DECK Multi-zone systems. So when there is no heat required the heating
fan just shuts down and vice versa. What I am not sure is, whether
eQuest will have two fan loads instead of one.... And I am not sure how
to check that in eQuest either...

Anyways hoping that this would simulate my three deck single fan
multi-zone with hot water loop heat system as precisely as it can.

 

If others have found a better way to model three deck multi zone with
single fan, please let me know... it will be a great help.

Thanks.

Prem

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of
Sundharam, Premnath
Sent: Tuesday, December 29, 2009 1:24 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Multi-Zone Hot Deck supply Flow rate error

 

Hello Everyone,

 

I am using a Multi-Zone 3 deck constant volume system and have given all
the required flow rates and horse power information for that system.
When I run the compliance check analysis for Title 24, it gives me a
"HVAC System 'EL1 Sys1 (MZS) (ML.C1)' Hot Deck Supply Flow (no default)"
error and I am not able to proceed without eliminating this error. 

 

The error description says: Missing Data - Hot deck supply air flow rate
required for permit submittal. 

 

I have all the air flow rates specified as Min cfm/sf under flow
parameters under fans for a MZS system (Actually the error navigation
takes directly to this input screen and I have all the parameters
entered) and for some reason it keeps giving me this error.

 

Is there any other place I have to give the Hot deck supply flow rate
for a MZS?

Please help!

Thanks and happy new year to all.

Prem

 

Premnath Sundharam, Assoc. AIA, LEED AP

Architectural Designer  |  Senior Associate

psundharam at dlrgroup.com

DLR Group

Architecture  Engineering  Planning  Interiors

o: 602/381-8580
6225 North 24th Street, Suite 250  Phoenix, AZ  85016-2020
dlrgroup.com <http://www.dlrgroup.com/>   |  listen.DESIGN.deliver
 
 

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