Depreciated gfunction.uniform_temperature from pygfunction about ghetool

[wouterpeere]

The new 'equivalent' method in the gFunction class of pygfunction based on Prieto and Cimmino (2021), is very fast.
Currently, within GHEtool, when you want to size a field, for which the size is not precalculated, a whole new dataset is generated. This is very slow and, now, unnecessary.

This will be changed so, whenever a (rectangular) field is chosen, for which no precalculated data is available, a warning will be thrown and the gfunctions will be calculated immediately.

[wouterpeere]

Implementation started in separate branch

[blcools]

Hello Wouter. I seem to be having a bug when the dataset is being generated. I did a simulation with a 2x1 field and asked the GHEtool to calculate the necessary depth. When the boreholes are 8,9m apart, the precalculated databases is used and the depth is as expected (about 130m for a family home). When I then ask the software to put the boreholes at 10m apart, the dataset is being genereated, but the calulated depth is aproximately half of this 130m. I might be doing something wrong, but the onlyt thing I did was copy the first scenario and change the distance between the boreholes. The first scenario (with the precalculated data) als fits with what Smartgeotherm calculates, so that looks fine. Might it be that with the newley generated dataset, the calculated length per well is afterwards divided by the total number of boreholes? Kind regard, and thanks for making this software

[wouterpeere]

@blcools we will continu this discussion in a separate issue.

[wouterpeere]

Partly implemented, but first tests show an increase in calculation time (for fields which already have precalculated data) of more than a factor of 10.
Ideally, it will be partly JIT, partly precalculated g-function data.

[wouterpeere]

For the GUI however, to decrease the setup.exe-file, it can be useful to implement just the JIT g-function calculation and let a separate calculation thread precalculate the required g-function datafiles. So we don't need the 200MB of precalculated data ...