<div>Hello,</div>
<div>I am gathering information on a thermosiphon solar water heater system on TRNsys (and TRNed if necessary) and trying to build a model.</div>
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<div>The main problem is that the T° coming out of the heat exchanger (and into the solar heated water tank) is unknown and therefore might require a loop with a random initial value and many iterations. </div>
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<div>Is this really necessary, would anyone happen to have a rough draft of this kind of model or something relatively close?</div>
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<div>Thank you very much for any help at all</div>
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<div>Charles</div>