Niels Posted April 20, 2022 Share Posted April 20, 2022 I am currently working on a project where the client has requested that we use the global horizontal irradiation, horizontal diffuse irradiation and wind temperature from PVGIS CMSAF. The client gave the following instructions which I followed: Start with the default PVGIS import “PVGIS:TMY Sarah,Cosmo or NSDRB” Then go to PVGIS (version 5.1): https://re.jrc.ec.europa.eu/pvg_tools/en/#api_5.1 to download the following monthly data (PVGIS-CMSAF) for the location: (i) Global horizontal irradiation; (ii) Diffuse/global ratio (use this to manualy calculate the monthly diffuse horizontal irradiation); (iii) Temperature; Then overwrite the first three columns in PVGIS with this external data. Windvelocity and humidity remain unchanged. I modified the site by going into choose site > open the specific site and changed the data in monthly meteo. This gave me a glob hor of 1134,7 a diffhor of 601,1 and an T_Amb of 10,8 Afterwards I ran the Pvsyst however on the main results page I can see that the used data is from the original PVGIS TMY import namely: globhor 1139,7 diffhor 557,4 and T_Amb 10,5 and not the modified version. Please advice on what went wrong and how I can get Pvsyst to use the modified data. Link to comment Share on other sites More sharing options...
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