Re: [TRNSYS-users] EES and TRNSYS

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

Dear Zouhour,
  Each TRNSYS component in a simulation has initial values that are
set by the user in that component's proforma. The initial values just
give the component a place to start its iterations; as soon as the
simulation starts, the initial input values are replaced by the
calculated output values of the upstream components. The one exception is
inputs that are not connected from another component; these inputs remain
constant throughout the simulation and keep the initial value set in the
proforma. Because the initial values are replaced by calculated output
values, the initial values don't matter too much - they only need to
allow the model to solve. The EES component is no different; in the very
first iteration, the initial values set in the proforma are placed on the
Windows clipboard automatically, are sent to EES, EES solves using those
values, and generates outputs, the outputs are placed on the clipboard
and are read by TRNSYS. As soon as the second iteration occurs, the
inputs to the EES component are the outputs of other components upstream.
I think all you have to do is pick some initial values that are
reasonable enough to allow your EES model to solve during the
initialization time step.
Kind regards,
 David


At 14:12 1/9/2008, zouhour sayadi wrote:
> Dear all , 
> I have to couple a project created with EES with TRNSYS .For this purpose
> , I used the exemple "calling EES " in the exemples library of
> TRNSYS .The method as explained there is via the clipborad which 
> link between the inputs of my EES project and the data comming from
> TRNSYS ,I mean that I must copy the initial values that TRNSYS tranfers
> to EES to the clipboard  , for this exemple , it's OK , but for my
> EES  project I don't know what are the initial values that I take.So
> , I don't understand how this transfer from TRNSYS to EES is hapened and
> how the clipboard can contain the data from TRNSYS, in general , please
> explain me how to link TRNSYS to EES .
> Thanks 
> My best regards 
>
>
>
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