Semi-Analytical Method for 3D Transient Heat Transfer in Thermally Interacting Fields of Ground Heat Exchangers

The study of heat transfer in ground exchangers (GHEs) considering the fluid advection inside pipes; between and through grout material; thermal interaction GHEs is a challenging task. present paper presents new semi-analytical method that takes into account aforementioned effects to consider both short- long-term GHEs. was studied by transient multipole expansion time-dependent temperatures an model for pipes obtained from energy balance on carrier fluid. Thermal interactions were analyzed using equivalent borehole while penalizing include effects. Validation short-term predictions performed comparing proposed experimental data found literature FEA model. then compared with simulations geothermal field comprised 24 multi-annual simulation. resulted substantial reduction computational time preserving good accuracy when