<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:14pt"><span><div><span>Dear David</span></div><div><span></span> </div><div><span><font size="3" face="Times New Roman"></font></span></div><div><span style='color: black; font-family: "sans-serif"; font-size: 14pt;'>Thank you for your quick reply. I doubt that type 56 will be used with outdoor pool, I think that type 56 should be only used with indoor pool , please advise if i am wrong. I took your notes below into consideration, but the problem was not solved. However, I attached the tpf for your kind review.</span></div><div><font size="3" face="Times New Roman"></font></div><div><span></span><span style='color: black; font-family: "sans-serif"; font-size: 14pt;'><span>Best regards</span></span></div><div><font size="3" face="Times New Roman"></font></div><div><span></span><span style='color: black; font-family: "sans-serif";
font-size: 14pt;'><span>Nidal Abdalla </span></span></span></div><div><br></div> <div style="font-family: arial, helvetica, sans-serif; font-size: 14pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <font size="2" face="Arial"> <div style="margin: 5px 0px; padding: 0px; border: 1px solid rgb(204, 204, 204); height: 0px; line-height: 0; font-size: 0px;" class="hr" contentEditable="false" readonly="true"></div> <b><span style="font-weight: bold;">From:</span></b> David BRADLEY <d.bradley@tess-inc.com><br> <b><span style="font-weight: bold;">To:</span></b> Nidal Abdalla <nidalabdalla@yahoo.com> <br><b><span style="font-weight: bold;">Cc:</span></b> TRNSYS-users <TRNSYS-users@cae.wisc.edu> <br> <b><span style="font-weight: bold;">Sent:</span></b> Monday, July 16, 2012 6:16 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [TRNSYS-users] pool temp of outdoor pool
Type 344<br> </font> </div> <br>
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Nidal,<br>
I have been using Type344 quite a lot lately and have not had
trouble with it. I can think of a number of possible causes for the
behavior that you describe but without seeing the project it is not
possible to know which one is the trouble. I think the critical
thing to do is to use a Type65 to look at the values of inputs 15
and 16 to the pool (of course you will have to look at the outputs
of whatever Type is connected to those inputs; a pump perhaps or the
outlet of the solar collector). When you know what the inlet
temperature and mass flow rate of heating water to the pool are, it
should be obvious whether such a volume at such a temperature is
able to change the pool's temperature.<br>
<br>
1. it could be that you have so few collectors in comparison to the
size of the pool that the collector system can't affect the pool.<br>
2. if could be that the controller that determines when the
collector system needs to run is not working the way that you expect
it to.<br>
3. it could be that the evaporative, convective, and radiative
thermal losses from the pool are large in comparison to the energy
input from the heating system and that the pool is completely
dominated by its surroundings and not by the system.<br>
<br>
Another thing to try is to disconnect the solar collector system and
put in an imaginary source of hot water (just set the inlet
temperature to a constant value and turn an arbitrary mass flow rate
on and off with a controller. Verify that the pool temperature is
affected by those inputs.<br>
<br>
Kind regards,<br>
David<br>
<br>
<br>
<div class="yiv1845874045moz-cite-prefix">On 7/15/2012 01:42, Nidal Abdalla
wrote:<br>
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<div><font size="3" face="Times New Roman">
</font><font size="3"><font face="Calibri">Dear All</font></font></div>
<div><font size="3" face="Times New Roman">
</font></div>
<div style="margin: 0in 0in 10pt;" class="yiv1845874045MsoNormal"><font size="3"><font face="Calibri">I am wondering if type 344
related with outdoor swimming
pool have been updated or not. In fact, I tried to heat
the pool using solar
system by connecting the solar collector via input number
15 and 16, but I found
that the temperature of the pool wasn’t raised regardless
of the collector
area. Do you any suggestions in this regards?</font></font></div>
<div><font size="3" face="Times New Roman">
</font></div>
<div style="margin: 0in 0in 10pt;" class="yiv1845874045MsoNormal"><font size="3"><font face="Calibri">Best Regards</font></font></div>
<div><font size="3" face="Times New Roman">
</font><span style="line-height: 115%; font-size: 11pt;">Nidal Abdalla</span></div>
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<br>
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<pre class="yiv1845874045moz-signature">--
***************************
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="yiv1845874045moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com" rel="nofollow" target="_blank" ymailto="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
http://www.tess-inc.com
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