[TRNSYS-users] ΠΡ: Comparing the type560 PV-T with the type103b PV

[David BRADLEY]

Jim,

   Types103 and 560 definitely use different approaches to the thermal 
and electrical energy balance but I am wondering if the issues you are 
seeing actually have to do with differences in the incident radiation 
due to the way that those models treat incidence angle modifiers. Can 
you try running a case in which the solar radiation is normal to the 
panel and constant? Make sure to set the IAMs in Type560 to unity as 
well as the Type103 tau-aplha product to the same.

kind regards,

  David


On 11/01/2021 11:00, dimitris soukoulis via TRNSYS-users wrote:
>
> Hello! I am sending my question again with the hope that someone will 
> reply. Thanks !
>
> *Από: *dimitris soukoulis <mailto:saintdimi at hotmail.com>
> *Αποστολή: *Τρίτη, 26 Οκτωβρίου 2021 2:16 μμ
> *Προς: *trnsys-users at lists.onebuilding.org
> *Θέμα: *Comparing the type560 PV-T with the type103b PV
>
> Dear All,
>
> I am currently trying to compare the difference between a simple PV 
> panel ( type103) and a PVT collector (type560) but I am not getting 
> the expected results, because the output of the PVT is less than that 
> of the PV which doesn’t make sense. My calculations are the following 
> : I calculated the type103 efficiency by multiplying the module’s 
> current (Parameter 7) with the voltage(Parameter 6) at the MPP for 
> reference conditions and divided it by the product of the insolation 
> at reference conditions (P 5) and the module’s area (P 12). That 
> efficiency I entered to the Parameter 18 of type560. I also made the 
> areas of the two components equal ( 71,2 m2 in my case ) and changed 
> the tubes number to 712 so it would have the same ratio as the default 
> setting which is 10 tubes/m2. By doing so I expexted to have a higher 
> electrical yield from the PVT but that was not the case. Did I do 
> something wrong with my calculations ?
>
> I am attaching the project’s files.
>
> Thanks a lot,
>
> Jim Soukoulis.
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI  53703 USA

P:+1.608.274.2577
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com
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