[Equest-users] Unmet Heating Hours - ES

Fri Oct 22 09:10:34 PDT 2010

Yay, Omar!! You are really learning this stuff fast. It makes sense to me
that a gym would need more airflow. It probably should be thought of in the
terms of air changes per hour (ACH) instead of cfm/sf, due to the volume of
a gym being greater than a normal space. I'm surprised this made no sense to
the design team. Pretty soon you'll be teaching them all kinds of valuable
lessons!

Cheers,

Carol

On Fri, Oct 22, 2010 at 5:18 AM, Omar Katanani <omar at ecoconsulting.net>wrote:

>  No problem, it’s the first time I actually have a valuable answer!
>
>
>
> However, note that I couldn’t justify some of my zones with excessive
> underheating or undercooling. I do not know why these specific zones have
> caused problems. Keep in mind that you need to coordinate with the
> Mechanical Engineers regarding any changes in the supply flow rates. I had
> to increase the supply flow rate of a gym from 11,000CFM to 16,000CFM in
> eQUEST, and this made absolutely no sense to the design team!
>
>
>
> 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 *
>
> ___________________________
>
> 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
>
>
>
>
>
> -----Original Message-----
> *From:* Chris Swanson [mailto:cswanson at rdfa.com]
> *Sent:* 22 October 2010 14:49
> *To:* Omar Katanani
> *Cc:* equest-users at lists.onebuilding.org
> *Subject:* RE: [Equest-users] Unmet Heating Hours - ES
>
>
>
> 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 *
>
> ___________________________
>
> 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
>
>
>
>
>
> -----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
>
>
>
>
>
> *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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-- 
Carol Gardner PE
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