Question about DRYCOLOD.mos / weather CSV file

[Norah135]

I worked on developing a test case independently and followed the documentation for guidance. However, I have a question regarding the water files: How can I modify the DRYCOLOD.mos file to suit a specific location? Additionally, I’m curious about the creation of the weather CSV file. I understand that it is generated using a simulation, but I’m still unsure about the process. Is it possible to obtain the CSV file without running a simulation model? I went to get the weather csv file in simple way based in the location that I will provide.

[EttoreZ]

Dear @Norah135 .mos weather files are extensions used by Modelica libraries. However, they are identical in content to .TMY3 or .epw weather files. You can go the E+ websiste and get a weather file for your location. Some already have .mos available. If that is not the case you can convert your .epw following the procedure highlighted here: weather generation, just go to the section "add new weather data". If you have your own .TMY2 or TMY3 weather file, you need to use E+ converter to first convert it into an .epw and than convert it to .mos. The fastest way to generate the .csv file is as you mention to simulate jus the weather reader and not the whole model (with any modelica tool OpenModelica, Dymola, Optimica), and then adapt this script to create the .csv. If you do not want to use a simulation, you would have to manually creating the '.csv' file.

[Norah135]

Thanks for your response @EttoreZ . I have a couple of questions:

Why do I need the .mos file, and what’s the purpose of the simulation process ?
Can I just get the data CSV file by extracting it from a previous file (.mos file) ?

[EttoreZ]

The .mos file is needed for the simulation of the Modelica model, the .csv file is used by BOPTEST to produce the weather forecasts. The simulation is an easy way to generate the .csv file starting from the .mos file using the script I linked in the previous post. You can manually extract the data from the .mos file, but you need to rename it, resample it, and add some variables that are calculated and are not present in the original .mos file, but are present in the .csv (Altitude Angle,Solar Declination,Solar Hour Angle,Solar Time,Zenith Angle,Black Sky Temperature). These variables are generated with the weather reader I mentioned before during the Modelica simulation. For a detailed explanation on how each Test case is set up you can check the documentation, both user guide and design specification.

[dhblum]

Note also that during the simulation of the Modelica model, the weather reader interpolates the .mos file into splines for intervals sub-one hour. Thus, for BOPTEST to provide accurate deterministic weather forecasts at sub one-hour resolution (if asked for by a user through the API), we wanted to replicate that spline behavior, and therefore run the weather-only simulation to convert the .mos used by the Modelica model into the .csv used by BOPTEST.