Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

ground model in energyPlus

asked 2015-08-14 08:57:12 -0500

antifx's avatar

updated 2020-01-20 13:40:49 -0500


how is a proper way to model the ground(temperature) in E+(i use Version 8.1)? Is there maybe a easy way (where the ground temperature depends just on the outside temperature)?

Thank you very much!

edit retag flag offensive close merge delete


For your bonus question; use OutputControl:Table:Style and select unit conversion JtoKWH

Julien Marrec's avatar Julien Marrec  ( 2015-08-14 11:18:37 -0500 )edit

I would encourage you to separate out the question about units to be an entirely different topic.

JasonGlazer's avatar JasonGlazer  ( 2015-08-14 11:39:29 -0500 )edit

Or just delete it from the posting

Julien Marrec's avatar Julien Marrec  ( 2015-08-14 12:07:41 -0500 )edit

1 Answer

Sort by ยป oldest newest most voted

answered 2015-08-16 10:04:55 -0500

antifx's avatar

Regarding my question i read this: Object: Site:GroundTemperature:BuildingSurface "Otherwise, take the indoor air temperature and subtract 2C as a reasonable starting value to use for most commercial applications in the U.S."

So should I simulate (in my example a 1 zone house) without HVAC (the house is located in europa/germany) - take the averrage monthly room temperature and substract 2C - and this are the values for Site:GroundTemperature:BuildingSurface?

And if there is a HVAC system - same approach (modeling without HVAC, set ground temperature)?

Thank you very much.

edit flag offensive delete link more



This extra information should be added to your original question, not here as an answer. The short answer though is no, you can't do what you propose for a house. The edge effects are too large so the ground under the building won't be in the kind of equilibrium found under a large commercial building.

Jamie Bull's avatar Jamie Bull  ( 2015-08-16 18:19:22 -0500 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer


Question Tools

1 follower


Asked: 2015-08-14 08:57:12 -0500

Seen: 182 times

Last updated: Aug 16 '15