Thermal response testing (trt)

Understanding Your Ground’s Thermal Performance

Designing an effective Ground Source Heat Pump (GSHP) system requires accurate knowledge of how your site’s subsurface will perform as a heat exchanger. The thermal characteristics of the ground vary significantly depending on geology, soil composition, moisture content, and groundwater conditions—factors that differ from site to site and even across a single property.

Properly sizing a vertical ground heat exchanger (VGHX) depends on understanding these thermal properties with precision. Without site-specific data on ground thermal conductivity and temperature profiles at depth, system designers are forced to use conservative assumptions that often result in oversized installations with unnecessarily high capital costs, or worse, undersized systems that underperform and experience premature failure.

Determining the actual thermal conductivity variation with depth and the undisturbed ground temperature is essential for designing an efficient VGHX field that delivers optimal performance and long-term reliability while minimizing upfront investment.

Advanced Testing for Accurate Results

Geothermal Drilling Australia (GDA) provides advanced Thermal Response Testing (TRT) services to support the design and optimisation of closed-loop geothermal ground loop systems for commercial, industrial, government, and large-scale residential applications. Our expertise and multidisciplinary approach utilising the latest global industry-leading testing equipment, software, and methodologies ensures accurate subsurface data, enabling efficient and cost-effective geothermal system designs from concept through to installation.

Our TRT services deliver precise measurement of:

This data forms the foundation for properly sized, high-performing geothermal systems that deliver reliable heating and cooling for decades, even centuries.

Making Informed Decisions

Thermal Response Testing can be a critical step in evaluating the performance of the ground as a heat source and sink. Contact us for more information about the viability of a TRT for your next project and how it can reduce risk, optimise system performance, and ensure your geothermal investment delivers maximum value.

Alternatively, we may already have information about the ground conditions you can expect on your site from our in-house database obtained from TRTs performed across the country over the past decade. This existing data can potentially expedite your project timeline and reduce upfront investigation costs while still providing the site-specific thermal property information needed for accurate system design.