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What methods/resources are available to add ground temperatures

Dear all,

I'd like to add ground temperatures to my model in particular we would like to use the FCfactorMethod just like the DOE prototype buildings.

As far as I can tell there are no methods/code in the OpenStudio SDK or OpenStudio standards gem to help with adding the Construction:FfactorGroundFloor or Site:GroundTemperature:FcfactorMethod objects to the IDF.

If this is the case, would it be easier to use another method to simulate ground heat transfer? Could someone please suggest one.

I've also tried to use the standards gem ground temp method to at least add the ground temperatures based on climate zone (ASHRAE-169-2006), ashrae building type and ashrae standard

However it doesn't like the arguements which I fed in I always get the generic values returned in so I'm wondering in what format is it expecting these arguements?