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<p>David,<br>
</p>
<p><br>
</p>
<p>Thank you for your response.I have checked the parameters as suggested.The design outlet fluid temperature was not below the design wet bulb temperature. Although,when I reduce the design wet bulb temperature,I didn't get any error message.</p>
<p><br>
</p>
<p>However,the outlet water temperature is higher than the design outlet fluid temperature. How can I achieve a lower outlet water temperature,probably similar to the <span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);">design
outlet </span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);">fluid temperature or lower?</span><br>
</p>
<p><br>
</p>
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<p>Regards,<br>
</p>
<p>Idris<br>
</p>
<p><br>
</p>
<p> </p>
<p> </p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> David BRADLEY <d.bradley@tess-inc.com><br>
<b>Sent:</b> 30 April 2015 15:35<br>
<b>To:</b> TRNSYS users mailing list at OneBuilding.org; Shofolahan, Idris Adewale<br>
<b>Subject:</b> Re: [TRNSYS-users] Type 510 cooling tower -Fan control signal error</font>
<div> </div>
</div>
<div>Idris,<br>
The error message doesn't have to do with the fan control signal. The error is that the model cannot determine the energy transfer coefficients for the tower given the parameters that you have entered. For example, if you give a design outlet fluid temperature
that is below the design wet bulb temperature then it is physically impossible for a tower to deliver such an outlet water temperature and the model will generate the error that you received. The fan control signal appears involved because the energy transfer
coefficients are only calculated if the tower is actually on and running.<br>
regards,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 4/30/2015 12:20 AM, Shofolahan, Idris Adewale wrote:<br>
</div>
<blockquote type="cite">
<pre>Dear all,
I'm currently working on a project using a chiller and type 510 cooling tower. The project is given error when the fan control signal is set at 1 at the input tab. What do you think is the cause of this error? Schematics and error message of the project attached.Thank you.
Regards,
Idris
________________________________________
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<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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