Interactive hydraulic design of ground loop networks

User manual

3.0

Version

October 2026

www.glnanalysis.com

Table of Contents

1. Chapter 1Foreword — Is the pump undoing the ground heat exchanger?Many geothermal heat pump systems never achieve their promised energy efficiency, and the problem often lies not in the ground, but in the pumping system.
2. Chapter 2How to citeIf GLN Analysis supported your work, please cite it.
3. Chapter 3Feature overviewGLN Analysis version 3.0 checks whether every borehole gets its flow share, stays turbulent at peak, is correctly sized, and what head the pump needs.
4. Chapter 4Quick startGLN Analysis is one of the three modules of the Analysis Suite, which are installed together and share a single window.
5. Chapter 5ShortcutsThe keys, gestures and mouse actions that speed up drawing and editing on the Hydraulic network canvas. None of them changes what a network computes.
6. Chapter 6Saving, loading and exportingGLN Analysis is one of three modules of a single Analysis Suite project.
7. Chapter 7Project descriptionThe Project description panel records project identity, site location, client and general notes that shape the network.
8. Chapter 8Heat carrier fluidThe Heat carrier fluid panel selects the fluid that will circulate in the network.
9. Chapter 9Pump curveThe Pump curve panel holds the library of circulating pumps available to the hydraulic network.
10. Chapter 10Hydraulic networkThe Hydraulic network panel is where the piping that connects the various components of a ground-source heat pump system is drawn and solved.
11. Chapter 11ConsoleThe console reports the design-level results of a solve, the ones the per-element tables cannot show at a glance.
12. Chapter 12CataloguesThe Catalogues section gathers the component, fitting-loss and pipe catalogues used to seed a GLN Analysis drawing.
13. Chapter 13ReferencesThese references document GLN Analysis's methods: Darcy-Weisbach friction losses, fitting loss coefficients and antifreeze fluid correlations.