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### Can I use "Site:GroundTemperature:FCfactorMethod" as monthly ground temperature inputs for ground floor heat loss?

I am using OpenStudio to model several archetype domestic buildings.

I know there are numerous posts on using 'slab' and 'kiva' to approximate ground temperatures underneath a building that can then be used as ground temperature inputs to calculate ground floor heat loss.

However I am unable to get any of these to work, as I am not used to writing code and was hoping that I could use the GUI of OpenStudio for my modelling. In the Energy Plus Results file, it gives monthly ground temperature as calculated by the FC Factor Method. See image below:

My question is whether I could use these temperatures to input into OpenStudio using the Site:GroundTemperature:BuildingSurface object described here

If not, is there a simple way to calculate average monthly indoor air temperatures? This is so that I can apply the principle of:

"a reasonable default value [of monthly ground temperature] is 2C less than the average indoor space temperature."

I'm really stuck here because I feel like all my modelling will have been for nothing if I can't get at least approximate ground temperatures!

Thanks,

Jack

 2 retagged Aaron Boranian 12575 ●49 ●20 http://bigladdersoftware.com/

### Can I use "Site:GroundTemperature:FCfactorMethod" as monthly ground temperature inputs for ground floor heat loss?

I am using OpenStudio to model several archetype domestic buildings.

I know there are numerous posts on using 'slab' and 'kiva' to approximate ground temperatures underneath a building that can then be used as ground temperature inputs to calculate ground floor heat loss.

However I am unable to get any of these to work, as I am not used to writing code and was hoping that I could use the GUI of OpenStudio for my modelling. In the Energy Plus Results file, it gives monthly ground temperature as calculated by the FC Factor Method. See image below:

My question is whether I could use these temperatures to input into OpenStudio using the Site:GroundTemperature:BuildingSurface object described here

If not, is there a simple way to calculate average monthly indoor air temperatures? This is so that I can apply the principle of:

"a reasonable default value [of monthly ground temperature] is 2C less than the average indoor space temperature."

I'm really stuck here because I feel like all my modelling will have been for nothing if I can't get at least approximate ground temperatures!

Thanks,

Jack