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Cédric, are you familiar with building model Type 56? If yes you can use it to calculate the diffuse shading acc. to a Perez sky. If not is maybe too complicated to explain everything correctly. For Type 56 you can generate a shading maks by TRNbuild after drawing your “building” including shaders in SketchUp. Your “building” would be a box with a sloped roof and a roof window representing you collector row. The row in front of the collector row is defined as “shader”. You need to use the option “internal radiation calculation” for the roof orientation. For the roof window you can select the output “incident diffuse radiation including shading effects” . This output divided by the area would be the input for your collector model. Dipl.-Ing.
Transsolar Energietechnik GmbH Curiestraße 2 70563
Transsolar: KlimaEngineering- Technologien für energieeffizientes Bauen und Nutzerkomfort in Gebäuden Geschäftsführer :Diplom-Ingenieur
Eingetragen beim Amtsgericht
Steuernummer: 99073/00911,USt-IdNr.: DE 152272639 Von:
Dear TRNSYS-Users, I would like to use the type of collector array shading between rows (type 30) connected to a weather data reading and processing (type 15) in order to simulate
performance of large scale solar collector field. I made some first check only with one row in order to find normally the same results as without collector shading. The beam radiation is the same (normal) but the
total radiation is lower due to a lower diffuse radiation (not normal). When I check the type 30 model it seems that an isotropic sky model has been implemented in order to calculate the diffuse radiation. Am I right ? As I prefer to use the Perez 1999 Model (5 for the parameter “Tilted Surface Radiation Mode” of type 15), I would like to know if this model was or is planned to
be implemented in the type 30 ? Thanks Best Regards, Cédric Paulus CEA INES – DTBH/SBRT/LSHT | +33 (0)4 79 79 21 17 |