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Hi,
Would anyone know where I can find a Type for a field of Borehole Heat Exchangers with free location of boreholes?
Popular Type557 cannot deal with this, since all boreholes are located on a honeycomb structure.
According to this 2016 master thesis ( https://www.diva-portal.org/smash/get/diva2:914770/FULLTEXT01.pdf), some Types able to do this using g-functions technique have been developped in the past (Type 203, 243, 244, 246), especially at Université de Montréal. Have you ever heard of these Types?
Best,
Charles
I am not aware of the Université de Montréal models that are based on g-functions. I would be very interested in dusting them off if someone out there has access to them! Less than a week ago I was asked if there was such a model and I was unaware of one!
Some years ago there was a model called SBM that was developed by Daniel PAHUD and if I recall correctly, it allowed you to define where you wanted the bores to be placed. You might find some information about it at: https://repository.supsi.ch/3042/1/29-Pahud-1996-SBM.pdf
kind regards,
David
Dear David,
Thanks for your suggestion.
I have been thinking about what follows: Using g-functions for close-loop ground heat exchangers means using convolution (also called superimposition principle) to deal with time-varying heat rates. This will be probably quite painfull to implement in a dedicated Type.
As an alternative, I would fit a network of resistances and capacities on whatever g-function I like (borehole heat exchangers, pile HE, etc.), and then use that network to compute the evolution of temperature with Type 78a (Differential équation solver).
Best regards,
Charles
