GLN Analysis features and specifications

GLN Analysis version 3.0 answers the four questions a ground loop network is judged on: (1) does every borehole get its share of the flow, (2) is that flow turbulent at the heating peak, (3) is each pipe the right size, and (4) what head must the circulating pump supply.

Feature overview

Drawing & Modelling
Diagram-driven modellinga node per component, an edge per pipe	✓
Component types in the paletteactive, passive, thermal, instrumentation, storage	35
Valve, exchanger and heat-pump genres, each with its own symbol and default K	✓
Ready-made archetypes shipped with the module	4
Ground heat exchanger generatorsingle-U, double-U, coaxial; parallel or series	✓
Reusable archetypes with thumbnails	✓
Independent networks in one drawing, each with its own fluid, flow rate and temperature	✓
Result maps drawn on the network itselfpressure, velocity, head, elevation	4
Hydraulic Solver
Newton-Raphson mass balance at every free node	✓
Darcy-Weisbach distributed losses, Swamee-Jain friction factor	✓
Minor losses as K·ρv²/2	✓
Piezometric head formulationgauge pressure plus ρg·z	✓
Sparse Jacobian, pattern analysed interactively	✓
Solution recalculated interactively, in a few milliseconds	500 boreholes
Pumps
Pump slots, each with its own H-Q points and efficienciesseeded as a size ladder, meant to be replaced by the curve of the pump specified	5
Curve completed to the shutoff head and the runout flow	✓
Separate hydraulic and motor efficiencies	✓
Operating point — flow, head, fluid power and electrical draw	✓
Control modesconstant speed, constant head, imposed flow	3
Fluids & Pipes
Heat carrier fluids through the Melinder correlations	5
ρ and µ evaluated at each network's own temperature	✓
Pipe entries28 metric DN and 21 imperial IPS, SDR 9 / 11 / 17	49
Design Checks & Diagnostics
Velocity window checked per pipem/s	0.3 – 2.5
Friction gradient window checked per pipePa/m	100 – 400
Reynolds number and flow regime, per pipe	✓
Balancing indicatorhighest to lowest borehole loop flow	✓
Results & files
Guided analysis-tree workflow	✓
Per-pipe and per-node results tablessortable, with the three advisory checks in the cell they judge	✓
Unified project filedrawing, pumps, fluid and project record, shared with the GHE and TRT modules	.ghe
Reusable pipework archetypessaved from a selection, inserted from a thumbnail gallery	.hya
High-resolution capture of the active viewanimated GIF while the flow animation runs	PNG
Verification
Reference scenarios	40
Cross-checked against an independent solverEPANET 2	✓
Worked examples of the reference textbook reproduced	✓
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 module9 figures	33 000 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+

Every feature above is in the demo, with limited input ranges. No registration.