Ground source heat pump design software, from the response test to the pipe network

Thermal response test analysis

The thermal response test is the in-situ measurement on which the design rests. TRT Analysis fits the ground conductivity and the borehole resistance from the field record, including records that were interrupted, which the straight-line methods cannot interpret.

• Infinite line source, and a neural network model trained on the short-term response
• Interrupted and restarted tests interpreted without discarding the record
• The fitted values carry into GHE Analysis, and you choose which technique's value travels

Ground loop sizing and simulation

GHE Analysis simulates the borehole field hour by hour, drawn as it will be drilled. It computes the fluid temperatures over one to fifty years, with groundwater flow included in the g-function.

• Fields to 625 boreholes and 500 m deep, in regular grids or fully irregular layouts
• Hourly entering fluid temperature over one to fifty years, in a single pass
• Sizing by the ASHRAE alternative method, and what drives the total length

Ground loop network and header piping design

GLN Analysis designs the part of the system above ground. It solves the network drawn as a piping and instrumentation diagram and checks four things: how the flow is shared among the boreholes, whether it is turbulent, whether each pipe is correctly sized, and what head the circulator must supply.

• Newton-Raphson mass balance, Darcy-Weisbach losses, Swamee-Jain friction
• Pump curves from manufacturer H-Q points, matched to the resistance of their circuit
• Velocity and friction gradient checked against the recommended windows, pipe by pipe