TRT Analysis features and specifications
TRT Analysis version 3.0 interprets a thermal response test from the raw field record to the undisturbed ground temperature, the ground thermal conductivity and the effective borehole resistance. Every step is interactive and reversible: which data to use, where the heating phase begins and which averaging method applies can all be revised after the fact, and the estimated properties follow each change.
Feature overview| Data Import & Processing | |
| CSV import of the TRT time series (Q, V, Tin, Tout) | ✓ |
| Paste from a spreadsheet, and copy the loaded table back out | ✓ |
| Optional vertical undisturbed-temperature profile | ✓ |
| Low-pass filter for measurement noise | ✓ |
| Interactive phase selection — circulation, heating, recovery | ✓ |
| Undisturbed Ground Temperature | |
| Determination methods — manual, circulation phase, vertical profile | 3 |
| Mean annual ground temperature Ta from a logged profile | ✓ |
| First-Order Approximation (FOA) | |
| Heating-phase infinite line-source regression | ✓ |
| Recovery-phase regression | ✓ |
| Ground conductivity λs and effective resistance Rb* | ✓ |
| Critical time tcr drawn on the regression charts | ✓ |
| p-linear average of the mean fluid temperature | ✓ |
| Borehole configurations supportedsingle & double U-loop, coaxial, standing column | All 5 |
| Short-Term g-Function (ANN) | |
| Pre-trained on 3D transient finite-element datawithin 1 × 10⁻⁴ °C | ✓ |
| Standard, pulsed and interrupted TRT | ✓ |
| Heating and recovery phases interpreted together | ✓ |
| Measured heat-injection history by temporal superposition | ✓ |
| Interactive calibration with live RMSE feedback | ✓ |
| Borehole configurations supportedSingle U-Loop only | 1 |
| Maximum test durationshort-term g-function | 21 days |
| Ground conductivity learned by the networkW/m·K | 0.25 – 8 |
| Grout conductivity learned by the networkW/m·K | 0.25 – 5 |
| Borehole length learned by the networkm | 50 – 250 |
| Diagnostics | |
| Reynolds number and flow-regime flag, per phase | ✓ |
| Histograms of heating power, flow rate and model residuals | ✓ |
| Residual mean, standard deviation and RMSE | ✓ |
| Values read off any curve or histogram bar on hover | ✓ |
| Scaled borehole cross-section schematic | ✓ |
| Results & Export | |
| Guided analysis-tree workflow | ✓ |
| Automatic CSV export — FOA and short-term g-function results | ✓ |
| Self-contained project file, shared with the other modules | .ghe |
| Verification | |
| Verification scenarios runnable inside the application | 43 |
| Checked against analytical solutionsIngersoll line source, Horner recovery plot | ✓ |
| Bundled sample test reproduced value for value at every releasenon-regression | ✓ |
| Analysis Suite | |
| Modules in one applicationTRT interpretation, GHE design, GLN hydraulics | 3 |
| Parameters carried from one module to the nextTRT → GHE → GLN, choosing which technique's value travels | ✓ |
| Documentation | |
| Illustrated user manual written for this module11 figures | 16 000 words |
| Read inside the application, as a PDF, and onlineno registration | ✓ |
| Context help on every panel, opened from the panel itself | ✓ |
| Quick-start walkthrough of a complete analysis | ✓ |
| Linked reference section — every method traced to its publication | ✓ |
| Specifications | |
| Operating system | Windows 10+, macOS 14+ |
How the two methods differ
Two complementary methods are carried. The first-order approximation fits a line source to the heating phase, and to the recovery phase when the test carries one, and applies to any borehole configuration. The short-term g-function is reconstructed by a pre-trained neural network and convolved with the heat-injection history actually measured, so it also interprets the pulsed and interrupted tests that the line-source assumptions cannot accommodate; it is for now limited to a single U-loop borehole. The table below summarises the principal features available in this release.
Where each line is documented
Every line of the table above is a panel of the application, and every panel has its own chapter in the manual — with the method traced to the publication it comes from. The manual reads online without registration.
The TRT Analysis manual, in full · What the module does, and why it matters · Free for research and teaching
Every feature above is in the demo, with limited input ranges. No registration.