| Product(s): | CIBSE Weather Data | ||
| Version(s): | V8i (Version 26) | ||
| Environment: | N/A | ||
| Area: | N/A | ||
| Subarea: | N/A |
Overview
Most Hevacomp Simulations will run with Meteonorm weather data. In some instances it is advisable to use CIBSE weather data.
Energy year data can be created with Meteonorm or CIBSE data.
Summer design year can only be created with CIBSE data.
Please note that only 2006 CIBSE weather data is approved by DCLG for use in PartL Level 5 Simulations.
Either of the following weather packages can be purchased from CIBSE (see here) and installed into Bentley Hevacomp. (Please note that the Combined Data Package is incompatible).
Method
Installing CIBSE Weather Data
Once the weather data is purchased and downloaded, it must be installed into the Bentley Hevacomp data folder. For Hevacomp v26, this is specified during installation. By default this is:
C:\ProgramData\Bentley\Hevacomp V8i\Hevacomp
Within the data folder, locate the Weather Data folder, and then the CIBSE folder. Unzip your CIBSE weather data (or copy, whichever is relevant) into this folder.
Future Weather Data
Bentley Hevacomp supports CIBSE's Future Weather Data.
This can be purchased and downloaded from the CIBSE website. Please read this note from CIBSE regarding the various formats that are available:
“The .dsy and .try are old formats that were originally released when the weather files were first produced in 2002. They are just text files that contain the data in columns. To our knowledge there is not much demand for the formats, they were produced more as a "legacy", just in case someone did still use them. The London DSYs were produced previous to this release and the developers decided not produce a .dsy. If all the files had been developed by the same researchers at the same time, there would be consistency. But they have been developed at different stages, due to the current demands of the industry. “
With regards to this note, Bentley Hevacomp recommend
you use the .CSV version of the weather data files.
Once you have downloaded your Future Weather Data files, they should be installed as follows:
1] Ensure you are logged into Bentley Communities and use these links to download the Energy Year and Summer Year index (NDX) files. These files contain Current DSY and TRY indexes and future CSV indexes. Despite the index's containing full lists of weather locations you will only be able to use the locations your have purchased from CIBSE.
2] Copy the downloaded eweather.ndx and sweather.ndx files into the folder: C:\ProgramData\Bentley\Hevacomp V8i\Hevacomp\Weather Data\
3] Unzip (or copy) your CSV weather data files into the folder: C:\ProgramData\Bentley\Hevacomp V8i\Hevacomp\Weather Data\CIBSE\
Once installed, please see this article for guidance on how to apply this weather data in Hevacomp Simulator.