Max Ohagen Student

Here are some screenshots for further explanation.

Hi Carlos, sorry for explaining it a bit confusing. We don’t use the plugin at the moment so its uncoupled! The problem is we have a time series for the flow rates of the BHE Array and when the flow rates drop below 20 m3/h, the Bhe error gets really high and then all temperatures are wrong. hope this helps, cheers Max

Hello everyone, I have the following problem: I created an FEFLOW Problem to model a BHE Array consisting of 64 BHEs connected in parallel, so the Input goes to all BHEs which then goes to the output. For bigger flow rates of lets say 150 m3/d the simulation runs totally fine but for flow rates below 20 m3/d the BHE Error Norm raises astronomically high causing completely wrong calculations. We coupled the BHE Array to a TRNSYS Model, with an IFM Plugin so the low flow rates somehow need to be calculated correctly. Has someone an Idea what could be the issue? We first thought laminar flow inside BHEs could be the problem, but reading the White Papers FEFLOW should handle this right? Is there any numerical parameter in the settings we are missing? I can provide the information for our chosen settings if needed! Thanks, Max