[Equest-users] Unmet Heating Hours - ES

[Carol Gardner]

I agree with Omar, especially if you let eQUEST autosize your cfm/sf. It
sets it a .5 cfm/sf which in my experience is almost always too low.

Carol

On Wed, Oct 20, 2010 at 1:06 PM, Omar Katanani <omar at ecoconsulting.net>wrote:

>  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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