Hybrid solar plants that combine concentrated solar power (CSP) and photovoltaic (PV) technologies require efficient thermal energy storage (TES) to ensure continuous and flexible operation. This work was carried out within the framework of an ongoing project supported by the Italian National Agency for New Technologies, Energy, and Sustainable Economic Development (ENEA). Thermocline single-tank systems are a promising solution because of their compactness and cost advantages, but their performance strongly depends on how effectively the thermocline can be maintained during charging and discharging. In this thesis, a computational fluid dynamics (CFD) model of a single-medium (molten salt) indirect thermocline TES with three internal serpentine coils is developed.