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Jing,<br>
Thank you for the file and first I want to say that your
simulation is very well put together. You avoided a lot of the
pitfalls and traps that are common sources of errors! Well done.<br>
<br>
I had a look at your simulation and found that during those few
periods of the year when the water is coming out of the tower
slightly hotter than it goes in are just because the ambient
temperature and RH are so high at those times that the tower can't
do any cooling. The way that a closed circuit tower works is that
water is sprayed over the tubes that contain the water that is being
cooled. As water evaporates off the tubes, it cools the tubes and
thus the water in them. If it gets too hot and humid out, however,
there isn't much evaporation off the tubes and consequently there
isn't any cooling.<br>
Best,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 5/1/2014 10:11, Jing Hong wrote:<br>
</div>
<blockquote
cite="mid:CABWCf9ObCWsiO1ARguAYM29yZDND26TVSy4KCTwkozMNHgVvRw@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>David,</div>
<div> </div>
<div>Thanks! Here is the machine schedule, as attached.</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Wed, Apr 30, 2014 at 4:35 PM, David
BRADLEY <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:d.bradley@tess-inc.com" target="_blank">d.bradley@tess-inc.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF"> Jing,<br>
Could you please send me the file "Machine schedule.sl7"
in addition to the two that you already sent (no need to
copy the entire list).<br>
Best,<br>
David
<div>
<div class="h5"><br>
<br>
<div>On 4/29/2014 13:41, Jing Hong wrote:<br>
</div>
</div>
</div>
<blockquote type="cite">
<div>
<div class="h5">
<div dir="ltr">
<div>Dear all,</div>
<div> </div>
<div>I am trying to test a cooling tower. As
attached, I have a simplified cooling tower
system with my own control strategy. But when
the cooling tower is continuously working, the
fluid outlet temperature of cooling tower will
be higher than the return. I didn't figure out
which part wrong.</div>
<div> </div>
<div>If you have any experience of this situation
before, please let me know. It will be very
helpful for me. I appreciate. </div>
<div> </div>
<div>Best wishes,</div>
<div> </div>
<div>Jing Hong<br clear="all">
<br>
-- <br>
</div>
<div dir="ltr">
<div>Doctoral Student</div>
<div> </div>
<div>University of Wisconsin-Milwaukee</div>
<div>School of Architecture and Urban Planning</div>
</div>
</div>
<br>
<fieldset></fieldset>
<br>
</div>
</div>
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</blockquote>
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<pre cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
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</blockquote>
</div>
<br>
<br clear="all">
<br>
-- <br>
<div dir="ltr">
<div>Doctoral Student</div>
<div> </div>
<div>University of Wisconsin-Milwaukee</div>
<div>School of Architecture and Urban Planning</div>
</div>
</div>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
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