[TRNSYS-users] EES and TRNSYS

[David Bradley]

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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