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Martin,<br>
I would recommend that you connect up all of the relevant Type60
energy outputs (energy added by the HX, energy added by inlet flow
1, etc.) to an online plotter and see what you can learn. It may be
that the heat exchanger is already so much larger (or smaller) than
it needs to be that doubling its area doesn't have a significant
impact. You can also see the UA of the HX among the outputs. Make
sure that you are using a small time step and tight tolerances on
your simulation as well.<br>
Kind regards,<br>
David<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 5/16/2014 04:20, Martin Berov wrote:<br>
</div>
<blockquote
cite="mid:CAJam3+XzksMs=JU5HuJ+LaWyyi2L7_OtequfjKXFkXpvbP-5KA@mail.gmail.com"
type="cite">
<div dir="ltr">Hi ,
<div><br>
</div>
<div>In my simulation I'm using tank Type 60 with internal heat
exchanger. So I wanted to evaluate the influence of the HX
area on the solar fraction and collector efficiency but with
keeping all parameters constant and only changing the HX area
and length I keep getting exactly the same solar fraction and
same amount of HX energy transferred in the tank even if the
HX areas are double in difference between the two simulations.</div>
<div><br>
</div>
<div>Any explanation regarding this?</div>
<div><br>
</div>
<div>Thank you</div>
<div><br>
</div>
<div>Kind regards</div>
<div>Martin</div>
<div> </div>
</div>
<br>
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<pre class="moz-signature" cols="72">--
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David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
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