Marcin Posted February 20, 2020 Report Share Posted February 20, 2020 Hello Valentin Team, I`ve created 3D project with bifacial modules (east/west) I don`t know if i do something wrong or there is a problem in aplication but in "Calculation": PV Generator Energy (AC grid) probably calculates energy only for one side. I`v done some tests and facade configuration heading to west producing the same amount of energy as bifacial setup heading to east/west. Calculation works correctly in 2D. Bifacial and facade projects included in attachment. Niemierzyno_1.pvprj Niemierzyno_1_proba_usun.pvprj Niemierzyno2d.pdf Quote Link to comment Share on other sites More sharing options...
developer_mh Posted February 20, 2020 Report Share Posted February 20, 2020 Hi Marcin, in the 3D environment of PV*SOL, we decided not to calculate bifacial gains if we have east/west mounting structures like in your pictures on the left. We assume that there is no irradiance hitting the backside of the module, since the triangular space below the modules will be dark. Also for facade structures, we decided not to calculate bifacial gains, since we considered them to be usually parallel to a vertical wall. But we just discussed it here and we will modify that in the future. Mounting structures of type 1 ("Tilting of modules") and type 3 ("Facade tilt") will calculated with the view factor bifacial model for inclination angles between 10° and 80°, and with the "vertical" model for angles between 80° and 90°. If the inclination angle is below 10°, no irradiation gains will be calculated. But for now, if you want to calculate with vertical modules oriented towards East/west, just use the mounting structure type 1. Kind regards, Martin Quote Link to comment Share on other sites More sharing options...
Marcin Posted February 20, 2020 Author Report Share Posted February 20, 2020 Thank you Martin for reply, To clarify situation here. Right now i can`t make bifacial installation like on picture with title "Bifacial two sides" and and proper Generator Energy calculated. I can make it like on picture with title "Facade one side" but this is not resolve my problem because i need installation with 90 degree mounting and modules on both sides. Is there any workaround for now to achive this ? Regards Quote Link to comment Share on other sites More sharing options...
developer_mh Posted February 20, 2020 Report Share Posted February 20, 2020 Hi Marcin, I am not sure if I understand correctly.. Quote because i need installation with 90 degree mounting and modules on both sides Do you mean, you have a vertical structure with two bifacial modules, one to each side? So that their backsides touch? Kind regards, Martin Quote Link to comment Share on other sites More sharing options...
Marcin Posted February 21, 2020 Author Report Share Posted February 21, 2020 Hi Martin, Quote Do you mean, you have a vertical structure with two bifacial modules, one to each side? So that their backsides touch? Yes Installation like this one below: Quote Link to comment Share on other sites More sharing options...
developer_mh Posted February 21, 2020 Report Share Posted February 21, 2020 Hi Marcin, from what I see on the picture there and also on their website (https://www.next2sun.de), there are only two bifacial modules per section, one on the top and one below. I think we can see it very clearly here on this picture: This system can be easily modelled in 3D right now, with the help of mounting system type 1: And, in order to get the vertical posts in the correct place, set the Support Points Distance to a value a bit smaller than the longer side of the PV modules. Hope that helps, kind regards, Martin Quote Link to comment Share on other sites More sharing options...
K24 Posted May 20, 2021 Report Share Posted May 20, 2021 Hi Martin, I am trying to simulate a similer System with roof top mounting East/West and 15 dgree. PVSol still does not calculate the bifacial gains? Quote Link to comment Share on other sites More sharing options...
developer_fw Posted May 21, 2021 Report Share Posted May 21, 2021 Hi K24, do you have a project file where this occurs? You can send it via private message here in the forum. Best regards, Frederik Quote Link to comment Share on other sites More sharing options...
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