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<TITLE>RE: Heat Rejection consumption is so small!!</TITLE>
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<P><FONT SIZE=2>Dear all,<BR>
<BR>
Can anyone please answer my question that I sent last week? Your continuous support is much appreciated!<BR>
In addition to that, I have this small question below:<BR>
<BR>
Section G3.1.3.11 of ASHRAE 90.1 - 2007 says:<BR>
<BR>
"Condenser water design supply temperature shall be 85°F or 10°F approaching design wet-bulb temperature, whichever is lower, with a design temperature rise of 10°F. The tower shall be controlled to maintain a 70°F leaving water temperature where weather permits, floating up to leaving water temperature at design conditions."<BR>
<BR>
I was able to put the design set point temperature and the loop design DT of the Condenser water loop to 85F and 10F respectively.<BR>
<BR>
What about the tower? Where can I input this leaving temperature range from 70F up to the leaving water temperature?<BR>
<BR>
<BR>
Many thanks!<BR>
Omar<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>
<BR>
-----Original Message-----<BR>
From: Omar Katanani<BR>
Sent: Thu 7/15/2010 1:54 PM<BR>
To: equest-users@lists.onebuilding.org<BR>
Subject: Heat Rejection consumption is so small!!<BR>
<BR>
<BR>
<BR>
Dear all,<BR>
<BR>
<BR>
<BR>
What are typical values for heat rejection, if my Space Cooling constitutes 25% of my school consumption? All I'm getting is 1% or so!<BR>
<BR>
<BR>
<BR>
I left eQUEST to autosize the capacity of the tower, and I entered many default values into the inputs of the Open Tower and the Condenser Loop. I've heard that Heat Rejection in such climates such as Lebanon should reach at least 10%.<BR>
<BR>
<BR>
<BR>
One more thing, when modeling the baseline case according to ASHRAE 90.1, I read that I should model a condenser water loop for each chiller. So if I have 2 chillers, will I need 2 Open Towers?<BR>
<BR>
<BR>
<BR>
Many thanks,<BR>
<BR>
Omar<BR>
<BR>
___________________________<BR>
<BR>
Omar Katanani<BR>
Sustainable Design Engineer<BR>
<BR>
Email: omar@ecoconsulting.net<BR>
<BR>
<BR>
<BR>
EcoConsulting (Lebanon)<BR>
<BR>
Nahas Building, 4th floor<BR>
<BR>
4 St-Maron Street / Georges Haddad Avenue<BR>
<BR>
Postal Code: 2028 5806 SAIFI<BR>
<BR>
Beirut, Lebanon<BR>
<BR>
Tel: +961 (0) 1 971 255<BR>
Mobile: +961 (0) 3 045 045<BR>
<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>
<BR>
Website: www.ecoconsulting.net <<A HREF="http://www.ecoconsulting.net/">http://www.ecoconsulting.net/</A>><BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
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