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Coaxial Borehole heat exchanger
Posted 11 dic 2015, 05:52 GMT-5 Fluid & Heat, Heat Transfer & Phase Change, Porous Media Flow, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 5.2 3 Replies
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I work on geothermal heating systems using borehole heat exchanger (see file attached for general functioning of coaxial geothermal exchanger). To that purpose, I use non-isothermal pipe flow interface (calculates fluid exchanger temperature from reservoir temperature) coupled with Darcy's law and heat transfer in porous media interfaces (pressure and reservoir temperature).
So far I was able to model complex geometry of a single layered pipe loop. Now, I was wondering if there is a way to account for coaxial heat exchanger using the non-isothermal pipe flow interface (simplify 3D geometry of the pipe to 1D element). Due to the high extent of the numerical model, I cannot afford meshing the geothermal system explicitly in 3D. I know the solution exists in other numerical codes (such as FEFLOW) and I would like to reproduce using COMSOL.
Any suggestions would be highly appreciated!
Regards,
Morgan Le Lous
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Hello Morgan Le Lous
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