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

Thermal imbalance of the ground

asked 2016-09-28 02:20:32 -0500

Diego's avatar

updated 2016-09-28 07:31:51 -0500

Hi, I'm simulating a ground source heat pump coupled with vertical borehole heat exchangers, for heating and cooling an office building. During cooling season it rejects to the ground more heat than what it absorbs during heating season, so I'd need to analyse the increase of ground temperature. Is there a way to simulate the effect of thermal imbalance of the ground with OpenStudio, EnergyPlus or other software? Thanks.

edit retag flag offensive close merge delete


You may want to look at Kiva if you are getting unexpected results from EnergyPlus.

__AmirRoth__'s avatar __AmirRoth__  ( 2016-09-28 07:33:54 -0500 )edit

1 Answer

Sort by ยป oldest newest most voted

answered 2016-09-29 11:42:59 -0500

EnergyPlus can simulate the vertical borehole heat exchangers with the GroundHeatExchanger:Vertical object which it documented here.

image description

One of the outputs is the Ground Heat Exchanger Average Borehole Temperature so you should be able to see the temperature of the ground. There are many example files that use that object but you might want to start with looking at the GSHP-GLHE.idf file as a starting point.

edit flag offensive delete link more


Average borehole temperature is not a good indication of long-term increase of ground temperature. The undisturbed ground temperature is an input in E+, but E+ does not give ground temperature as an output. The model assumes that the undisturbed ground temperature stays constant, which makes its capabilities of simulating GSHPs over a long time period somewhat limited.

JKavanaugh's avatar JKavanaugh  ( 2017-10-25 08:14:04 -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: 2016-09-28 02:20:32 -0500

Seen: 247 times

Last updated: Sep 29 '16