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MassimoCimmino / pygfunction

An open-source toolbox for the evaluation of thermal response factors (g-functions) of geothermal borehole fields.
BSD 3-Clause "New" or "Revised" License
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NewFeature Analytical Short-term g-function #149

Open j-c-cook opened 3 years ago

j-c-cook commented 3 years ago

Javed and Claesson (2011) present an analytical solution for the short-term temperature response. It is validated against a numerical implementation and sandbox data. Detailed mathematical solution is given in Claesson (2011).

Javed, S., & Claesson, J. (2011). New analytical and numerical solutions for the short-term analysis of vertical ground heat exchangers. ASHRAE Transactions, 117(1), 3–12.

Claesson, J. (2011). Radial heat flow for a pipe in a borehole in ground using Laplace solutions. Report on mathematical background.

MassimoCimmino commented 2 years ago

I am considering the implementation of our transient multipole solution presented in [1].

This solution has the added feature of considering the position of the pipes in the borehole and the short-circuit resistance. It would allow us to re-use some of the interface of the steady-state pipe models in the pipes module.

[1] Prieto, C., & Cimmino, M. (2020). Transient multipole expansion for heat transfer in ground heat exchangers. Science and Technology for the Built Environment, 27(3), 253-270.

j-c-cook commented 2 years ago

That sounds great. I currently don't have time to dwell into either of Claesson's papers on the subject. From a top level, I like the look of Prieto and Cimmino (2020). I'll keep an eye out for a PR implementing the solution presented in [1] and see if I can provide support in any way.