| Abstract |
Thermal Response Tests (TRTs) are the industry-standard method for quantifying in situ ground thermal conductivity, a critical parameter to size ground heat exchangers and predict the performance of ground source heating and cooling systems. Conventional TRT apparatus require continuous energy input, typically provided by diesel generators—an approach that is logistically challenging, costly, and carbon-intensive. This study presents a TRT methodology using a trailer-mounted solar energy system that integrates photovoltaic panels, an inverter, and battery storage to generate the energy injected into a borehole with an electric heating cable. The study objective was to verify and demonstrate that solar energy that can be supplied to conduct TRTs with a low power requirement. Successful implementation at two sites in Whitehorse, Yukon (Canada), demonstrated the feasibility of significantly reducing diesel consumption. Generator runtime was reduced from a continuous 72-hour operation to intermittent periods of 2–4 hours, three times daily, with solar energy meeting the remaining load. Additionally, the use of an electric heating cable enabled TRTs to be conducted in existing groundwater monitoring wells, avoiding the need to drill new boreholes prior to confirming project feasibility. This approach offers a scalable, low-carbon alternative for in situ thermal conductivity analysis, especially suited for challenging & remote locations like northern communities. By improving the practicality and economics of TRTs in remote settings while simultaneously reducing their associated GHG emissions, this work supports broader geothermal potential mapping efforts and facilitates data-driven deployment of GSHP systems as part of climate-resilient infrastructure strategies for the Whitehorse area. |