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Barto,<br>
The flow rate out of the heat exchanger is equal to the flow rate
into the heat exchanger. You should be able to use whatever output
is providing the heat exchanger's inlet mass flow rate to also set
the inlet mass flow rate of the component that comes after the heat
exchanger. If making such a connection causes convergence problems
then that is a different issue and I would guess that the reason for
it is too long a time step. Keep in mind that TRNSYS can make one
control decision (pump on/ pump off) once per timestep and that if
you use a long timestep (such as an hour or even 15 minutes) then
the controls cannot converge upon an on/off decision. Also make sure
that you have some thermal capacitance in the loop made up of your
solar collector, heat exchanger, and pump (in other words do not
neglect the piping that connects all of those things.<br>
Kind regards,<br>
David<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 3/30/2014 14:42, Barto Pene wrote:<br>
</div>
<blockquote
cite="mid:CAABktHd0ntS_86jS5ytHODbosMj_K+88KP=qq572ZFO+9xev1A@mail.gmail.com"
type="cite">
<div dir="ltr">Dear all,
<div><br>
</div>
<div>I'm using the Type 60C - storage tank and I model the heat
exchanger inside the tank but when I do the connections I can
not find the output for "Flow rate for heat exchanger" and I
can't complete the connection with the pump (or solar
collector)-if I put the flow rate from the pump I get error
message "The simulation failed to converge after 5
timesteps..."</div>
<div>Does someone have idea how or what should I do?</div>
<div><br>
</div>
<div>Regards</div>
<div>Barto</div>
</div>
<br>
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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>
<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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