Design optimization and energy assessment of coaxial geothermal heat exchangers for residential applications

This thesis presents the simulation and performance evaluation of a coaxial geothermal heat exchanger for both heating and cooling applications. A detailed parametric analysis was conducted using COMSOL Multiphysics to study the effects of varying the inner and outer pipe diameters on the thermal performance of the system. The results were compared under different configurations to identify the most efficient design. Subsequently, an energy assessment was carried out using GeoTerMus, evaluating how much of the thermal demand of a typical residential building the optimized system could cover. The study demonstrates that, depending on the installed building systems and energy needs, the designed geothermal solution offers a feasible and sustainable alternative for residential climatization.