[Equest-users] Unmet hours

[Bruce Easterbrook]

Yes, your temperature set points, and throttling range (dead band).  A 
quick lean explanation.  Standard eQuest throttling range is 4F.  
Throttling hours are in 5F bands , 65, 75 and 80 being the critical 
bands for unmet hours.  Typical buildings are controlled at 70F for 
heating and 75 for cooling aligning with the cut-off points not the 
midpoints of the critical bands.  A little conflict.  Solutions, make 
your throttling range larger, 5 or 6 degrees normally will do it.  You 
can also modify your set points say to 68F heating and 78F cooling, 
69/76.  You just have to play with it a bit but normally the throttling 
range will do it.  The help file will provide more info on dead band and 
throttling range.
Bruce Easterbrook P.Eng.
Abode Engineering

On 08/07/2010 11:52 AM, Omar Katanani wrote:
>
> Dear all,
>
> I am having 19.2% of hours outside throttling range, and the fans are 
> on for 8760 hrs (all the year). This means 1682 hrs outside throttling 
> range. How can I reduce this number to less than 300? I increased the 
> chiller and boiler capacities a lot, (from 0.6 to 65 MBtu/h), but it 
> seems there is a limit on the effect of capacities on the hours unmet.
>
> Does anyone know how I can solve this problem? Is there any other 
> parameter i need to play with to decrease the number of unmet hours?
>
> Many thanks,
> Omar
>
> ___________________________
>
> 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) 1 971 255
> 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
>
>
> _______________________________________________
> Equest-users mailing list
> http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org
> To unsubscribe from this mailing list send  a blank message to EQUEST-USERS-UNSUBSCRIBE at ONEBUILDING.ORG
>    
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20100708/d075ac3f/attachment-0002.htm>