Release date: September 10, 2025Guest: Prof. Elsa Maalouf, Maroun Semaan Faculty of Engineering & Architecture, American University of Beirut (AUB)Episode overviewGeothermal can heat in winter and cool in summer “quietly, invisibly, and reliably”—but design costs keep it out of reach for many communities. Prof. Elsa Maalouf explains a new simulation shortcut—the “bucket space approximation”—that slashes compute time from days to hours on a standard laptop without sacrificing accuracy, making shallow geothermal more practical from Oslo to Valencia. She also maps the non-technical pieces (policy, finance, community awareness) needed to turn smarter models into real projects, including in energy-stressed places like Lebanon.Episode highlightsGeothermal 101: How ground-coupled systems deliver heating and coolingThe pain point: Why conventional modeling eats time, money, and specialized softwareThe breakthrough: A mathematical shortcut for the well’s “bucket” curvature and flowValidation: Comparable accuracy with far fewer resources; runs on a laptop in hoursBeyond engineering: Insights from a recent review in Renewable and Sustainable Energy Reviews on policy, financing, and community buy-inImpact lens: Pathways for affordable deployment in Lebanon and other underserved regions

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