Weather Convertor and Perez Model not working
Hi everybody,
I have meteorological data for a .epw file. I have the dry bulb temperature, relative humidity, atmospheric pressure, global solar radiation, wind direction, wind speed and total cloud cover.
When I try to use the weather converter (I convert .epw to .epw), it does calculated the horizontal infrared radiation (and delete my values for cloud cover), however it does not fill the direct and diffuse solar radiation (does not use the Perez model)
I have tried adding a .def file, but it does not change anything, thought I am not sure that I use it correctly as my case is not in the examples of the AuxiliaryPrograms Documentation.
Any help on that matter would be highly appreciated. Thanks!
@Aurore, have you tried using Elements to create your weather file? https://bigladdersoftware.com/project...
Hi Jeremy, thanks for your answer! I just did and it split it but its the same at all hours of the day : example my Global solar goes from 416Wh/m² at 7am to 658 (pic at noon) and then to 268 at 6pm, but then it puts the normal solar at 402 from 7am to 6pm and diffuse at 268 from 7am to 6pm so this cannot be correct. Do you have any other insights ? I'm really confused, since in the Engineering Reference and Auxiliary program it says E+ uses the Perez model to split it. I've looked everywhere and I don't understand why it does not work if the documentation says it should... ? Thanks
@Aurore - when you say that you did it, do you mean using Elements? If so, I have never used it (hence the suggestion in a comment instead of a full answer) so can't be of much help. You could try emailing the developers: elements@bigladdersoftware.com
Yes. I emailed them, lets see what they answer. I have found a similar post to mine here : https://unmethours.com/question/24509... However I tried what Michael and Amy both suggested and it does not work for me. It would be nice to have an example of the .cst and .def file that successfully work to do the Perez split, since the documentation says the WeatherConvertor can do it. It's really missing! Any help would be appreciated. Thanks
@Aurore - Did you get the reply? Any updates on it.