[Equest-users] Unmet Heating Hours - ES

Fri Oct 22 04:49:18 PDT 2010

Omar,

Your suggestion seems to have done the trick!  I did not know about the
Quality Control Reporting Tool, and now I realize how much of an asset
it will be in the future.  

Thanks a lot

Chris Swanson

Roger D. Fields & Associates

(614) 451-2248

From: Omar Katanani [mailto:omar at ecoconsulting.net] 
Sent: Wednesday, October 20, 2010 4:06 PM
To: Chris Swanson
Cc: equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] Unmet Heating Hours - ES

Chris,

Your building has 14 underheated zones.

Go to "Tools", "Quality Control Reporting...", then click the "QC
Details" tab, and then select "Show Errors Only".

Check section 6: Zone Control and Equipment Sizing.

What I usually do is that I increase the supply flow rate for each of
these 14 zones. This is the best option to solve the issue of unmet
loads in my opinion.

Best,

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_Nov10.htm
<http://ecoconsulting.net/www/Seminar_Series_Lebanon_Nov10.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/> 

-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Chris
Swanson
Sent: 20 October 2010 21:35
To: Pasha Korber-Gonzalez; Kelsey VanTassel
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Unmet Heating Hours - ES

Attached are both the .pd2 & .inp files.  I will look into the
suggestions below in the meantime.

Chris Swanson

Roger D. Fields & Associates

(614) 451-2248

From: Pasha Korber-Gonzalez [mailto:pasha.pkconsulting at gmail.com] 
Sent: Wednesday, October 20, 2010 2:27 PM
To: Kelsey VanTassel
Cc: Chris Swanson; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Unmet Heating Hours - ES

It sounds like the heated air is not being allowed to go where there is
a call for conditioning, have you checked your system reports too? it
might have to do with your system & temp scheduling.  Can you send your
.pd2 & .inp file both so that we can open your file in eQuest?

thanks,

pkg

On Wed, Oct 20, 2010 at 12:22 PM, Kelsey VanTassel <
KVanTassel at sustaineng.com> wrote:

Make sure that your thermostat type is appropriate. Use Reverse Action
if you want to allow the supply flow in heating mode to rise above the
minimum flow ratio, otherwise use Proportional. Also try reducing the
cool control range from 4 deg to 1 deg.

Kelsey Van Tassel

Mechanical Engineer | kvantassel at sustaineng.com

608.836.4488 ext. 20 | Fax: 608.836.4477

Sustainable Engineering Group

901 Deming Way, Suite 201

Madison, WI 53717

www.sustaineng.com <http://www.sustaineng.com/> 

From: equest-users-bounces at lists.onebuilding.org [mailto:
equest-users-bounces at lists.onebuilding.org] On Behalf Of Chris Swanson
Sent: Wednesday, October 20, 2010 1:16 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Unmet Heating Hours - ES

All,

I am modeling a two-story elementary school with a VRV / DOAS system in
one area (classrooms, admin.), and a VAV system in another (gym,
cafeteria, food prep.).  The unmet heating hours are currently around
750, and I am at my wit's end to reduce them further.  I have
incorporated suggestions such as increasing the throttling range
(currently at 6, helped a little bit) and sizing ratio (currently at
1.15, although increasing to 2.00 did not help much).  As I have also
tried my best to model the VRV / DOAS system, I'm still not sure if it
is correct...  I've just picked up what I could from the users archives.

Does anyone have suggestions for reducing the unmet heating hours that I
may not be aware of?  I have attached the .inp file.  Can anyone see
glaring mistakes in the model?

Thanks,

Chris Swanson

Mechanical Designer

Roger D. Fields & Associates

Columbus, Ohio 43220-2777

E-mail: cswanson at rdfa.com

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