Hello! I am trying to simulate a cooling system consisting of: a Ground Source Heat Pump connected to a Low Temperature Radiant System. I'm confused about how I must define the condenser and evaporator loops (Ground Heat Exchanger and RadiantSystem, respectily) of the Heat Pump. I would be grateful if you could guide me to correctly define these connections in the Plant Loop.
I suggest going at this in steps (e.g. make sure your model first works with TABS, then look at integrating GHX).
Peruse through the OpenStudio-Resources simulation tests: CTRL-F "low" (3 hits - only 2 offering cooling):
Each example holds 3 files:
Both the .rb and .py files are structured and commented so you get a sense of required items, step-by-step logic/implementation, etc. You can open the example .osm files using the OpenStudio Application, go over the plant/system layouts, run simulation tests, etc., before attempting adaptations to your model.
You can eventually do the same for GSHP: CTRL-F "ghx".
Hope this helps ...
Thanks, @Denis Bourgeois. I simulated the low-temperature surface in a (prototype) building in OS and then included a horizontal ground-based heat exchanger. This scenario represents my actual prototype, and I obtained simulation results. Now, I need to test a cooling heat pump that works among the aforementioned components. Should I test a water-to-water cooling heat pump, for example? Thanks for your advice !
@MarcosH : My hint to adapt your model in steps is simply a practical suggestion. Too risky to take on everything at once, especially if testing fairly rare combinations (GSHP <> TABS in cooling mode). But if your simulations are running error-free (check eplusout.err file), then by all means proceed at your own pace.
Your initial question is general in nature (i.e. GSHP, TABS, connections ... vs OpenStudio). The provided links address your question, I think. Maybe go through related UMH posts (e.g. here). Beyond that, I suggest you continue your efforts (step-by-step, checking logged errors and warnings), and if needed post another UMH question (more specific next time, hopefully with a public link to your .osm file).
Thanks for your advice. I'm trying to simulate experimental prototypes (focusing on research), which aren't the systems typically used for heating/cooling. I'd like to know how to configure a plant loop system (e.g., a low-temperature radiant system) to operate in free-run mode, that is, avoiding control by the setpoint controller. Thank you so much!
Asked: 2025-07-02 15:56:09 -0500
Seen: 109 times
Last updated: Jul 07
