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Good day,<br>
<br>
I would like to cite this question (10 September 2009)<br>
<i><br>
"Dear Trnsys user,
When a solar water collector (Type 73) connected to a heat
exchanger in a water tank (Type 60), what is the difference
between the Output of the 'useful energy gain' of Type 73 and the
Output of the 'Energy input from the heat exchanger of Type60?
></i><i>From my calculation, the energy from the heat exchanger
is much higher than the useful energy of the solar collector.
I am not understanding it.
Many thanks!"</i><br>
<br>
I have exactly the same problem and the link above hasn't been
answered.<br>
The source code says, that the "Energy input from the Heat
exchanger" is q_hx = UA_hx x LMTD<br>
<br>
Where is my thinking mistake? There can't be more energy input in
the tank than sun available!<br>
<br>
Cheers,<br>
<br>
Inga<br>
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