Re: [TRNSYS-users] Tank 60 heat exchanger parameters

[David BRADLEY <d.bradley@tess-inc.com>]

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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