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<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>Omar,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>For parking
deck fans, I have used a direct load on my meters. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>I am not
sure that the ASHRAE fan allowances were intended to account for fans that do
not serve enclosed spaces. Therefore, I’ve used the same peak power in my
baseline and proposed models.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>The key
variable is the schedule. ASHRAE 90.1-07 User Manual recommends using a
schedule “based on likely use.”<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>When installing
controls that are not code-required (eg CO monitoring), I would argue that
there should be fan power reductions over scheduled on/off and over full out
use.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>I believe this
has been addressed in past posts to the list; I think the recommendation was to
use “likely statistical schedules” of use, though I don’t
recall what these actually were? <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>The main trouble,
in my mind, is I’m not sure we can argue that 100% on all the time
control is a reasonable “baseline” for parking garage fans.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>Disclosure:
To date, I haven’t submitted this approach to the GBCI reviewers.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Omar
Katanani<br>
<b>Sent:</b> Thursday, July 29, 2010 12:00 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Toilet and Parking Exhaust<o:p></o:p></span></p>
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<p style='margin-bottom:12.0pt'><span style='font-size:10.0pt'>Dear all,<br>
<br>
I was wondering what is the best way to model exhaust fans in the school
toilets. I read some of the forum emails and what I'm doing now is that I
select the space type of the bathroom to be "plenum". Then go to
"Outdoor Air" tab and specify the flow in the exhaust
"Flow" input box, then specify the kW/CFM. I did so but didn't notice
a change in the ventilation fans consumption or in any other consumption.<br>
<br>
1) Can someone show me how I can see this? I have like
10 toilets or so, and their effect can't be that negligible!<br>
<br>
<br>
<br>
I have an underground parking with a supply fan and an exhaust fan (but no
heating or cooling). I obviously couldn't specify the zone type to
"Plenum" because then I won't be able to edit the supply rate. I put
the zone type to "Conditioned", and specified the maximum
cooling/heating rates of the parking to be 0 Btu/hr. I had an increase in the
ventilation fans consumption (due to the 30,000CFM of supply/exhaust in the parking).<br>
<br>
The problem is that I had a huge amount of additional cooling consumption! I do
not want to cool the air in the parking.<br>
<br>
2) What should I modify in order to have only ventilation in
the parking without cooling?<br>
<br>
I attach the files in this email, in case someone wishes to check them!<br>
<br>
PS: for the Unmet hours problem I had before, I was able to solve it by looking
into the Quality Control Report, then checking which zones had excessive
under-cooling. I increased the air supply flow rate for these zones, and the
problem is all fixed :D<br>
<br>
Many thanks,<br>
Omar<br>
<br>
<br>
___________________________<br>
<br>
Omar Katanani<br>
Sustainable Design Engineer<br>
Email: omar@ecoconsulting.net<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: www.ecoconsulting.net<br>
<br>
<br>
</span><o:p></o:p></p>
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