Convert IDF to SSC

Understanding IDF and SSC file formats

IDF (Input Data File) is commonly used in building energy modeling, particularly with EnergyPlus simulation software. It contains structured data describing building geometry, materials, schedules, and HVAC systems for energy analysis.

SSC (System Simulation Configuration) files are typically used in system simulation tools, such as TRNSYS, to define the configuration and parameters of simulation components and their interconnections.

Why convert IDF to SSC?

Converting an IDF file to an SSC file allows users to transfer building and system data from EnergyPlus to TRNSYS or other system simulation environments. This enables leveraging the strengths of both platforms for comprehensive energy and system analysis.

How to convert IDF to SSC

There is no direct, universal converter for IDF to SSC due to the differences in data structure and simulation focus. However, the process generally involves:

• Exporting relevant building and system data from the IDF file.
• Manually or semi-automatically mapping this data to the SSC format required by your simulation tool.
• Using intermediary tools or scripts to assist in the conversion.

Recommended software and tools

TRNSYS is the primary software for working with SSC files. For conversion, consider the following approaches:

• OpenStudio: Use OpenStudio to open the IDF file, then export building geometry and system data in a more accessible format (such as gbXML or CSV) via File → Export. These exported files can be used as references for manual SSC creation.
• Custom scripts: Python scripts (using libraries like eppy or pyidf) can parse IDF files and help automate the extraction and mapping of data to SSC format.
• TRNSYS3d: For geometry, use TRNSYS3d (a SketchUp plugin) to recreate or import building geometry, then configure the SSC file within the TRNSYS Simulation Studio.

Step-by-step conversion process

1. Open your IDF file in OpenStudio or a text editor.
2. Export or extract building geometry and system data.
3. Open TRNSYS Simulation Studio and create a new project.
4. Manually input or import the extracted data into the SSC file using the TRNSYS interface.
5. Validate the SSC file and run a test simulation to ensure accuracy.

Tips for successful conversion

• Carefully map HVAC and system components, as IDF and SSC may use different terminologies and structures.
• Check for data loss or mismatches, especially in schedules and control logic.
• Consult documentation for both EnergyPlus and TRNSYS for detailed mapping guidance.

Conclusion

While there is no one-click solution for converting IDF to SSC, using tools like OpenStudio, TRNSYS3d, and custom scripts can streamline the process. Manual review and adjustment are essential to ensure simulation accuracy.