Improving geothermal HVAC systems with mathematics

Sketch of a typical geothermal borehole, whose thermal conductivity differs from that of the surrounding ground. The left pop-out depicts the problem’s asymptotic structure and application of sub-annual harmonic excitation. Credit: Miguel Hermanns and Santiago Ibáñez, SIAM Journal on Applied Mathematics. Extreme weather events, water shortages, and other consequences of climate change have challenged—and compromised—energy…