Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
I suggest you first familiarize yourself with the EnergyPlus class ZoneEarthtube (see here & here).
How to get there using OpenStudio is another question. You'll come up with a few interesting UMH posts if you search for either "earth tube" or "ZoneEarthtube", including this one (which deals a bit more on OpenStudio, EnergyPlus measures, etc.).
