[TRNSYS-users] Tank 60 heat exchanger parameters

[David BRADLEY]

Martin,
  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.
Kind regards,
  David



On 5/16/2014 04:20, Martin Berov wrote:
> Hi ,
>
> 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.
>
> Any explanation regarding this?
>
> Thank you
>
> Kind regards
> Martin
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
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d.bradley at tess-inc.com

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