Overview

Most of the Design Simulation calculations will run with Meteonorm weather data. In some instances it is advisable to use CIBSE weather data. This data can be purchased from CIBSE (see here) and installed into Bentley Hevacomp.

Method

Installing the weather data

Once purchased and downloaded, the weather data must be installed into the Bentley Hevacomp data folder.

For v25, this is the HEVADATA folder and can be located in the installation folder (see here)

For 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 now 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] Locate C:\ProgramData\Bentley\Hevacomp V8i\Hevacomp\Weather Data\

    Unzip (or copy) the eweather.ndx and sweather.ndx files into this location.

2] Locate  C:\ProgramData\Bentley\Hevacomp V8i\Hevacomp\Weather Data\CIBSE\

    Unzip (or copy) your .CSV weather data files into this location

Using the weather data

Once your weather data is installed, load the Design Database project. From Building Data, select your buildings location as usual and ensure that CIBSE is selected as the weather source. When you exit the screen your standard weather data (Meteonorm) will be set up and the program will be primed for CIBSE weather data.

To set up CIBSE weather data for Simulation calculations, run the Weather Data program and select "New simulation days"

Select the required location for the Energy year, and push the "Add..." button. If you are asked if you with to overwrite existing data, select yes. Set up your summer design year in the same manner.

FUTURE WEATHER DATA

The method for activating future weather data is the same as above, though the lists will appear a little different:

Energy year data can be created with Meteonorm or CIBSE data.
Summer design year can only be created with CIBSE data.

See Also

Product TechNotes and FAQs

Building Product TechNotes And FAQs

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

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