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<DIV><SPAN class=320041907-17102008><FONT face=Arial color=#0000ff>Hello Max,
</FONT></SPAN></DIV>
<DIV><SPAN class=320041907-17102008><FONT face=Arial
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=320041907-17102008><FONT face=Arial color=#0000ff>I am
currently working on quite the same system</FONT></SPAN></DIV>
<DIV><SPAN class=320041907-17102008><FONT face=Arial
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=320041907-17102008><FONT face=Arial color=#0000ff>Types 537 and
538 from Tess libraries allow to set a desired output temperature. The type will
then calculates an sets the output flowrate for the whole solar loop (not the
pump).</FONT></SPAN></DIV>
<DIV><SPAN class=320041907-17102008><FONT face=Arial
color=#0000ff></FONT></SPAN> </DIV>
<DIV><SPAN class=320041907-17102008><FONT face=Arial color=#0000ff>Concerning
type 534, You might want to read the "PIO reference manual" in the TESS
documentation folder.</FONT></SPAN></DIV>
<DIV><SPAN class=320041907-17102008></SPAN> </DIV>
<DIV><SPAN class=320041907-17102008><FONT face=Arial color=#0000ff>Hope this
helps, </FONT></SPAN></DIV>
<DIV><SPAN class=320041907-17102008></SPAN> </DIV>
<DIV><SPAN class=320041907-17102008><FONT face=Arial
color=#0000ff>Romain</FONT> </SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=fr dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma><B>De :</B> Max Werlein [mailto:maxwithhat@hotmail.com]
<BR><B>Envoyé :</B> mercredi 15 octobre 2008 13:09<BR><B>À :</B>
trnsys users<BR><B>Objet :</B> [TRNSYS-users] PID
controller<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV style="TEXT-ALIGN: left">Dear TRNSYS users,<BR><BR>I have a solar collector
with a constant area, feeding its outputflow to a storage tank. Cold water
leaves the tank through a pump (variable speed type 10) and feeds the collector.
I now want to use a PID controller (or feedback controller) so as to regulate
the outlet temperature of the collector to lets say 90 ºC by varing the input
flowrate of the collector, hence controlling the variable speed pump. This does
not seem to work, whereas testin the PID conroller (without Tank) i found out
that I can control the collector inlet temperature for a constant area and
flowrate trough the collector. But controlling a temperature by variing the
flowrate sonhow does not work.<BR>Maybe anyone has any
suggestions?<BR><BR>Thanks and kind regards<BR><BR>max<BR></DIV><BR>
<HR>
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