| Project: | Weather Tool |
| Component: | Data Conversion |
| Category: | bug report |
| Priority: | normal |
| Assigned: | Unassigned |
| Status: | active |
| Attachment: | meteonorm_weathertools.jpg (337.4 KB) |
There seems to be an issue with solar radiation data imported into WeatherTool from Meteonorm, and possibly EnergyPlus.
Attached are two images of the solar radiation graph for Munich, the first from Metonorm imported data, the second being the WEA file included with WeatherTool. As can be seen, there doesn't seem to be any co-relation between these graphs.
The same also seems to happen with climate data imported from an EnergyPlus EPW weather file. This occurs whether the data is converted to the WEA format using either WeatherTool or the EnergyPlus conversion tools.
Oliver Hans originally brought this issue to my attention. He as also looked further into the matter, and believes that there seems to be some kind of multiplier being applied to the direct solar radiation values, somewhere between 2.0-2.5. Please find screenshot attached.
I don't know if this is a data conversion issue, or if there is something wrong with the data itself.
Kind regards,
sid.
Updates
The values look fine to me in all the Meteonorm files I have imported. Are you sure you are reading the correct columns in the MN6 file? Weathertool has a ccf prepared for EPW files that I have used to import a number of files successfully (it does not import global horizontal, so I have modified it, but that doesn't make much difference), and the charted values match perfectly.
Have you tried creating an EPW from Meteonorm and importing that? Are you importing with a custom ccf? I have had problems importing with a custom ccf if my csv had headers, so try deleting the headers first, them importing. I don't know if the WxTool native EPW import has a tag to ignore the headers, but it works with EPW files with headers just fine. I haven't used the Meteonorm ccf, but I have imported many custom files with custom ccf.
rds
Screenshots
Here are the other screenshots.