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

asked 2020-11-11 12:52:11 -0600

jaklloyd gravatar image

updated 2020-11-11 15:18:42 -0600

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: image description

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

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Comments

I think I have figured out how to use slab, just about! So I think the answer to this is a heavy NO! As the temperatures above are far lower than the temps that I got from slab. Is this right?

jaklloyd gravatar imagejaklloyd ( 2020-11-11 15:49:48 -0600 )edit