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<font face="Times New Roman, Times, serif">Yes, your temperature set
points, and </font><font face="Times New Roman, Times, serif">throttling
range </font><font face="Times New Roman, Times, serif">(dead band).
A quick lean explanation.</font> 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.<br>
Bruce Easterbrook P.Eng.<br>
Abode Engineering<br>
<br>
On 08/07/2010 11:52 AM, Omar Katanani wrote:
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<p><font size="2">Dear all,<br>
<br>
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.<br>
<br>
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?<br>
<br>
Many thanks,<br>
Omar<br>
<br>
___________________________<br>
<br>
Omar Katanani<br>
Sustainable Design Engineer<br>
Email: <a class="moz-txt-link-abbreviated" href="mailto:omar@ecoconsulting.net">omar@ecoconsulting.net</a><br>
<br>
<br>
EcoConsulting (Lebanon)<br>
Nahas Building, 4th floor<br>
4 St-Maron Street / Georges Haddad Avenue<br>
Postal Code: 2028 5806 SAIFI<br>
Beirut, Lebanon<br>
Tel: +961 (0) 1 971 255<br>
Mobile: +961 (0) 3 045 045<br>
<br>
<br>
EcoConsulting (UK) Ltd<br>
28 Marshalsea Road<br>
London, SE1 1HF<br>
Tel: +44 (0)207 939 0989<br>
Fax: +44 (0)207 939 0981<br>
Website: <a class="moz-txt-link-abbreviated" href="http://www.ecoconsulting.net">www.ecoconsulting.net</a><br>
<br>
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