Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question
1

ground to air heat exchanger ventilation

asked 2025-06-15 06:27:27 -0500

abd slam's avatar

updated 2025-06-16 09:14:43 -0500

How can I model a ground-to-air heat exchanger ventilation system (Canadian well / earth tube) in OpenStudio, and what loop or configuration do I need to connect it properly to my building's ventilation system?

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted
1

answered 2025-06-20 15:14:29 -0500

I suggest you first familiarize yourself with the EnergyPlus class ZoneEarthtube (see here & here).

How to get there using OpenStudio is another question. You'll come up with a few interesting UMH posts if you search for either "earth tube" or "ZoneEarthtube", including this one (which deals a bit more on OpenStudio, EnergyPlus measures, etc.).


edit flag offensive delete link more

Comments

1

thank you so much I really appreciate the response, the simulation went well I've just another is there any chances to visualise some of the output variables shown after the idf file in the link u gave me using Dview in openstudio should I just create another idf for this or is there a method to do it, thanks in advance

abd slam's avatar abd slam  ( 2025-06-21 05:52:23 -0500 )edit

I suspect you recovered the OpenStudio-generated IDF and added the ZoneEarthtube parameters by hand? And you seem successful in running simulations? If so, go over the generated eplusout.rdd file: it will hold all admissible output variables, specific to your IDF. Search for those listed here. Pick the ones you're interested in, and manually add them to your IDF (usually a copy/paste from the .rdd file). Re-run the simulation - they should be reported in the eplusout.eso file.

Denis Bourgeois's avatar Denis Bourgeois  ( 2025-06-21 06:10:24 -0500 )edit
1

It worked ! Thanks for your time

abd slam's avatar abd slam  ( 2025-06-21 06:19:46 -0500 )edit

hello again @Denis Bourgeois while simulating with the IDF that you gave me the simulation went well but the results weren't accepted, so I searched for something else while I've found this and thisit seems to be like what I want the question I have is how can link that to a thermal zone if it is possible with the inlet outlet inputs?

abd slam's avatar abd slam  ( 2025-06-30 03:33:08 -0500 )edit

Your links point to more conventional geothermal systems (boreholes, heat pump, etc.), with a refrigerant (e.g. propylene glycol) as heat exchanger fluid - not ventilation air (as per your original question on Canadian wells / earth tubes). This is a separate UMH question IMO. I suggest you first run UMH searches and go over OpenStudio examples (search "ghx_"). Best of luck.

Denis Bourgeois's avatar Denis Bourgeois  ( 2025-06-30 04:56:56 -0500 )edit

Your Answer

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

Add Answer

Training Workshops

Question Tools

1 follower

Stats

Asked: 2025-06-15 06:27:27 -0500

Seen: 132 times

Last updated: Jun 21