Re: [TRNSYS-users] Photovoltaic Pumping

[Georgios Kyriakarakos <gk@aua.gr>]

Dear Sergio Morales,

The problem is most likely in unit conversion. E.g. the unit used as output from one component does not match the unit the other component needs as input. You can go over this in numerous ways like inserting a calculator and making the unit conversation there, between the two types.
Since you are investigating PV pumping, I would suggest that you download and take a look at the MSc thesis of J. Eckstein, in which he developed routines for PV pumping water (not just a pump model). In the past I have used these routines successfully. Of course these routines had to be added manually to TRNSYS code.
The thesis can be downloaded directly by the corresponding university using the link below:
http://sel.me.wisc.edu/publications/theses/eckstein90.zip
The TRNSYS code is available in the Annexes of the thesis (in the past it used to be available in TRNSYS website as well).
Best regards from Greece,

George
------------------------------------------------------------------
Dr. George Kyriakarakos, Agricultural Engineer
PhD, MSc Energy Systems & Renewable Energy Sources
Agricultural University of Athens,
Dept. of Natural Resources and Agricultural Engineering
Iera odos street, 75, Athens 11855, Greece
Tel. +30.210.5294046 (direct), Fax:+30.210.5294023
Mobile +30.6942.046895
e-mail: <gk@aua.gr>
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----- Original Message -----
Από: sergio morales <sergio.moralesh@alumnos.usm.cl>
Ημερομηνία: Tuesday, December 16, 2014 8:39 pm
Θέμα: [TRNSYS-users] Photovoltaic Pumping
Προς: trnsys-users@lists.onebuilding.org


> Hello TRNSYS user
> 
> I have to simulate a photovoltaic pumping station. For this, i'm using 
> a
> photovoltaic panel with inversor (Type 194b) connected with a pump of
> variable speed with power input (Type749). I have the following problem
> with component Type 194b
> 
> TRNSYS Message    33 : An inconsistent connection has been defined in 
> the
> TRNSYS input file.  The desired units for the input do not match the units
> of the connected output as specified in the component model.  The
> discrepancy is listed below.  Reported information  : Not available
> 
> apparently the problem is in the junction of the photovoltaic panel with
> the pump, but i don´t know what is it. I want to know if the components
> chosen are appropiate to simulate the situation of photovoltaic pumping.
> I hope that you can help me
> 
> Thanks.
> 
> Regards.
> Sergio Morales
> -- 
> Sergio Ignacio Morales Hernández
> Estudiante Ingeniería Civil Mecánica, Mención Energía
> Universidad Técnica Federico Santa María
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