<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:10pt"><div id="yiv6569927598"><div><div style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 10pt;"><div id="yiv6569927598"><div id="yiv6569927598yui_3_13_0_1_1396980912287_6015"><div class="yiv6569927598yui_3_13_0_1_1396980912287_5910" id="yiv6569927598yui_3_13_0_1_1396980912287_6014" style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 10pt;"><div id="yiv6569927598yui_3_13_0_8_1396980912287_13"><div id="yiv6569927598yui_3_13_0_8_1396980912287_13" style="margin-top:0.1em;margin-bottom:0.1em;"><span id="yiv6569927598yui_3_13_0_8_1396980912287_20">Thank you David, exactly
that was the problem, I was recording temperatures above 60 C when there was no flow through the valve - I put a trigger printer recording only temp. when there is flow and the temperatures values were exactly as the set mixing temp. </span></div><div id="yiv6569927598yui_3_13_0_8_1396980912287_13" style="margin-top:0.1em;margin-bottom:0.1em;background-color:transparent;"><br clear="none"></div><div id="yiv6569927598yui_3_13_0_8_1396980912287_13" style="margin-top:0.1em;margin-bottom:0.1em;background-color:transparent;">I tried to put pipes between the collector the tank and the pump to get more realistic results regard outlet temperaturesas a result of the increased thermal mass and it was ok - but the only disadvantage is that the pump flow can not go under certain value (total volume of fluid in pipes) it gives convergence problems...so it means that it is not possible to test the influence of low flow on system efficiency
etc..</div><div id="yiv6569927598yui_3_13_0_8_1396980912287_13" style="margin-top:0.1em;margin-bottom:0.1em;background-color:transparent;"><br></div><div id="yiv6569927598yui_3_13_0_8_1396980912287_13" style="margin-top:0.1em;margin-bottom:0.1em;background-color:transparent;">Regards,</div><div id="yiv6569927598yui_3_13_0_8_1396980912287_13" style="margin-top:0.1em;margin-bottom:0.1em;background-color:transparent;">Barto</div><div id="yiv6569927598yui_3_13_0_8_1396980912287_13" style="margin-top: 0.1em; margin-bottom: 0.1em; background-color: transparent; color: rgb(0, 0, 0); font-size: 13px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal;"><br clear="none" id="yiv6569927598yui_3_13_0_1_1396980912287_6452"></div><div id="yiv6569927598yui_3_13_0_8_1396980912287_13" style="margin-top: 0.1em; margin-bottom: 0.1em; background-color: transparent; color: rgb(0, 0, 0); font-size: 13px;
font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal;"><br clear="none"></div><div id="yiv6569927598yui_3_13_0_8_1396980912287_13" style="margin-top: 0.1em; margin-bottom: 0.1em; background-color: transparent; color: rgb(0, 0, 0); font-size: 13px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal;"><span id="yiv6569927598yui_3_13_0_9_1396980912287_15"><br clear="none"></span></div></div><div class="yiv6569927598yahoo_quoted" id="yiv6569927598yui_3_13_0_8_1396980912287_15" style="display: block;"> <div class="yiv6569927598yui_3_13_0_1_1396980912287_3252 yiv6569927598yui_3_13_0_1_1396980912287_5912" style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 10pt;"> <div class="yiv6569927598yui_3_13_0_1_1396980912287_3253 yiv6569927598yui_3_13_0_1_1396980912287_5913" style="font-family:
HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 12pt;"> <div class="yiv6569927598yqt6608141044" id="yiv6569927598yqt67382"><div class="yiv6569927598yqt2318821345" id="yiv6569927598yqt17177"><div dir="ltr"> <font size="2" face="Arial"> On Tuesday, April 8, 2014 7:34 PM, David BRADLEY <d.bradley@tess-inc.com> wrote:<br clear="none"> </font> </div> <div class="yiv6569927598y_msg_container"><div id="yiv6569927598"><div>
Barto,<br clear="none">
It is not really possible to diagnose the problem without looking
at the project. I would recommend using an online plotter to look at
all of the temperatures and flow rates of all the flows going into
and coming out of the tank. If for some reason all of the
temperatures in the system are over 60C (including the temperature
of the tempering water) then Type953 would not be able to temper the
outlet flow. It could also be that you are seeing higher than 60C
temperature at the mixing valve when there is no flow through the
valve.<br clear="none">
If you are not able to sort out the problem using Type65 as a
debugging tool then you should send your project to your distributor
so that they can have a look at it.<br clear="none">
Kind regards,<br clear="none">
David<br clear="none">
<br clear="none">
<br clear="none">
<br clear="none">
<div class="yiv6569927598yqt6915655950" id="yiv6569927598yqt07530"><div class="yiv6569927598moz-cite-prefix">On 4/7/2014 08:16, Barto Pene wrote:<br clear="none">
</div>
<blockquote type="cite">
<div dir="ltr">Hi ,
<div><br clear="none">
</div>
<div>I get some strange result i.e I can not find logic in it: I
use tank Type 60c only heated by standard solar collector
installation. I use the differential controller(monitoring
temp.) to limit the tank top temperature to 60C and I'm also
using tempering valve Type 953 with diverting and three-wat
valves for controling the outlet temp. In the simulation I get
temperatures at the outlet of the three-way valve (after
mixing) higher than 60C (even 80-90C) how is it possible?</div>
<div><br clear="none">
</div>
<div>When I model the HX in Type60c with glycol solution I get
convergence problems and with water there is no problem...?</div>
<div><br clear="none">
</div>
<div>Thank you</div>
<div><br clear="none">
</div>
<div>Regards</div>
<div>Barto</div>
</div>
<br clear="none">
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<br clear="none">
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<pre class="yiv6569927598moz-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
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