[TRNSYS-users] problem with PV type 94a

[Michel Tamarzians]

Dear Federico,

I haven't seen the problem your addressing but you can check the following
things perhaps to make sure everything is correct:

- Make sure the temperature coefficient is given in V/K  (as normally it is
given as %/K in datasheets)
- The component is designed so that if no "Load Voltage" input parameter is
chosen zero, it assumes you have connected a mppt charge controller and
thus only the Pmpp, Vmmp, Impp are correct to be used. If you however have
determined a load voltage > 0 V (like direct connection to a load) then
probably the Parray, Varray, Iarray will follow the load.


Make checking this two things can help you sort out the problem.

Kind regards,
Michel


Op di 4 dec. 2018 om 20:10 schreef -- Fed -- via TRNSYS-users <
trnsys-users at lists.onebuilding.org>:

> Hello,
>
> i want to use type 94a for simulating a PV collector.
> I supply the parameters from a real collector datasheet in the proforma.
> Everything seems to work, but the voltage of the collector (both MPP and
> open circuit) does not seem to follow the temperature coefficient for V_oc. No
> matter which value a put as PARAMETER 8 (Temperature coeficient of Voc
> (ref. cond.)), the PV voltage does not change...
> Is there anyone who experienced the same issue?
> is there a problem with the type or am i doing something wrong?
>
> Thanks in advance,
> Federico
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