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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>
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                <pre>_______________________________________________
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</pre>
              </blockquote>
              <br>
              <pre cols="72">-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:<a moz-do-not-send="true" href="tel:%2B1.608.274.2577" target="_blank" value="+16082742577">+1.608.274.2577</a>
F:<a moz-do-not-send="true" href="tel:%2B1.608.278.1475" target="_blank" value="+16082781475">+1.608.278.1475</a>
<a moz-do-not-send="true" href="mailto:d.bradley@tess-inc.com" target="_blank">d.bradley@tess-inc.com</a>

<a moz-do-not-send="true" href="http://www.tess-inc.com" target="_blank">http://www.tess-inc.com</a>
<a moz-do-not-send="true" href="http://www.trnsys.com" target="_blank">http://www.trnsys.com</a></pre>
            </div>
          </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>

<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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