This library contains g-functions (thermal response functions) for standard, regularly spaced vertical borehole ground heat exchangers. In total, it contains 34, 321 configurations. To permit interpolation, each configuration has g-functions for heights of 24, 48, 96, 192, and 384 m. All the g-functions were calculated with burial depths of 2m, and borehole diameters of 15 to 17.5 cm, depending on height. In configurations with uniform spacing, the spacing between the boreholes is set to 5m, though it can be scaled to other horizontal spacings.
G-Function Library for Modeling Vertical Bore Ground Heat Exchanger
This library contains g-functions for standard, regularly spaced vertical borehole ground heat exchangers. In total, it contains 34, 321 configurations. Included is a library guide that outlines what is included in the archive and instructions for using it.
Contains g-functions for standard, regularly spaced vertical borehole ground heat exchangers in the lopsided U configuration. These configurations consist of U cases that have had some number of boreholes removed from their right side. These configurations all have a single row of perimeter boreholes.
Contains g-functions for standard, regularly spaced vertical borehole ground heat exchangers in the open rectangle configuration. These configurations represent N by M rectangular cases where boreholes are only around the perimeter, but the perimeter can have more than one row of boreholes.
Contains g-functions for standard, regularly spaced vertical borehole ground heat exchangers in the U configuration. This type of configuration is U-shaped, with an opening at the top. The U may have up to 3 perimeter rows of boreholes around all sides of the U. The number of perimeter rows is represented with “t.”
Contains g-functions for standard, regularly spaced vertical borehole ground heat exchangers in the L configuration. These configurations consist of a line N boreholes long and M boreholes wide. The L cases have a single row of boreholes.
Contains g-functions for standard, regularly spaced vertical borehole ground heat exchangers in the C configuration. This type of configuration may be thought of as an open rectangle configuration that has had some number of boreholes removed from the top side.
Contains g-functions for standard, regularly spaced vertical borehole ground heat exchangers in the contained zoned rectangle configuration. For each row, Column A shows the number of perimeter boreholes in the x and y directions. Columns B and higher show the available configurations, where each pair represents the number of interior boreholes, which are laid out in a rectangular array, in the x and y directions.
This document provides a guide to the data found in the submission. Documentation of json file structure and sample python code can be found in appendix 8.
Contains g-functions for standard, regularly spaced vertical borehole ground heat exchangers in the zoned rectangle configuration. This configuration type has had rows/columns removed from the interior zone to represent configurations where the interior spacing of the bore field is greater than that of the exterior (or perimeter) spacing.