Low Temperature Geothermal Systems

This presentation will focus on ambient to low temperature geothermal systems and thermal energy networks. It will begin with a quick review on how heat pumps work, the advantages to using them over traditional HVAC systems, then an in-depth description of the various ways they are coupled to the subsurface. This will include open loop, closed loop, novel technologies, and how to decide on the technology depending on local geology. This section will also briefly touch on low temperature systems and direct use technology.
The second portion of the presentation will widen the scope and explore the various ways geothermal systems can be connected to thermal energy networks. It will cover additional technologies/techniques used to store thermal energy, shave peak loads, and connect various sources and sinks. Last, this section will include two examples of thermal energy networks that utilize the techniques discussed in this presentation.

Carter Johnson, Geothermal Scientist
Carter is a geoscientist who has specialized expertise in geothermal systems. Carter received a Bachelor's of Science of Brigham Young University-Idaho with a minor in Geographic Information Systems. He also completed an M.S in Sustainable Energy Science with a special focus in geothermal systems where he specialized in numerical and chemical modeling of high temperature geothermal reservoirs. Carter has undergone rigorous geothermal-specific training and carries a broad set of skills. He has technical expertise in a variety of geothermal issues including well design, powerplant design, life-cycle assessments, numerical reservoir simulation, reactive transport modelling of reinjection fluids, and energy markets/economics. He currently works as the chief scientist for Egg Geo LLC.