azizsye1 Posted November 21, 2012 Share Posted November 21, 2012 Hello, I found the following information on the PVsyst Help section:The thermal behaviour is characterised by a thermal loss factor designed here by U-value (formerly called K-value), which can be split into a constant component Uc and a factor proportional to the wind velocity Uv : U = Uc + Uv · v (U in [W/m²·k], v = wind velocity in [m/s]).These factors depend on the mounting mode of the modules (sheds, roofing, facade, etc...). I want to determine how the Uv Factor is effected with a higher tilt angle. When going from 5 to 10 Degrees in a set-up on a flat rooftop, I would expect that the Uv value would increase. Currently I have Uc set to a default of 20 and Uv at 0. Please advise. Thanks. Link to comment Share on other sites More sharing options...
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