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Setting Ground Temperature in OS

asked 2019-09-29 14:00:12 -0500

BrunoRaviolo's avatar

updated 2020-01-07 17:05:37 -0500

Hi all,

I'm modelling a simple house with few thermal zones with OS 2.7.0, but in order to correctly simulate its thermal behavior the correct ground temperature must be informed, otherwise EnergyPlus will assume its default monthly temperature (18C) which isn't correct.

It's very much like this question:

Through an answer In this thread I've noticed that OS already has Site:GroundTemperature:BuildingSurface Model Object but I can't find it anywhere.

Could someone explain how to get it into my model?


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I've had this issue too and I didn't understand the answers so i searched for a ground temperature measures in open studio and got this unhandled exception which crashed my program " Provide URI is invalid: /api/metasearch/groundtemperature.xml? fq%5B%5D=bundl:nrel_measure&fq%5B%5D=tid:953&api_version=2.0 "

TheEnergyTutor's avatar TheEnergyTutor  ( 2020-05-26 09:50:02 -0500 )edit

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answered 2020-05-23 13:08:12 -0500

Saif's avatar

I am guessing you are looking for the object in the OpenStudio Application, as far as I know it has not been added to the application yet. You can add the site ground temperature to the model by using an OpenStudio measure. The documentation for this object is here

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need more detailed instructions on how to add this to OS

TheEnergyTutor's avatar TheEnergyTutor  ( 2020-05-26 12:32:32 -0500 )edit

you will need to write a measure which is a script in Ruby programming language, you can find more details about the measure writing in the OpenStudio documentation here

Saif's avatar Saif  ( 2020-05-26 13:25:06 -0500 )edit

Myself and my co-workers are engineers, not computer programmers. I don't see this happening as we already have full plate with what we do.

TheEnergyTutor's avatar TheEnergyTutor  ( 2020-05-26 14:01:47 -0500 )edit

answered 2020-05-23 04:02:03 -0500

TianZhichao's avatar

After simulating with OpenStudio, you can set up the Site:GroundTemperature:BuildingSurface in EnergyPlus. For buildings in a hot region, the ground temperature can be set to 24 to 26C for summer months, 16-18C for winter months, and decreasing temperatures for other months.

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but how do we do it?

TheEnergyTutor's avatar TheEnergyTutor  ( 2020-05-26 12:33:05 -0500 )edit

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Asked: 2019-09-29 14:00:12 -0500

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Last updated: May 23 '20