[2] described a thermodynamic model that simulates the discharge cycle of a single-tank thermal energy storage system that can operate from the two-phase (liquid-vapor) to supercritical regimes for storage fluid temperatures typical of concentrating solar power plants. Based on the second-law of thermodynamics, [PERSON] et al. [3] evaluated the thermal stratification of a single-tank TES system by accurate time-dependent 3D CFD simulations. [PERSON] et al. [4] conducted a comprehensive numerical simulation of a 125 \(\mathrm{MWh_{t}}\) thermocline tank and examined the effect of relevant design and operating parameters on the performance of the TES system. [PERSON] et al. [5] developed a thermophysical model of an innovative thermal energy storage facility, which is ideated, realized, and tested by ENEA (Italy) and tested properly for this particular geometry. The influence of the radial position (r) on the thermocline degradation was studied, finding that at the edges (r\(\rightarrow\)1) the thermocline remains unchanged for longer (around ten times more) than at the center of the tank (r\(\rightarrow\)0). [PERSON] et al. [6] analyzed the behavior of the most common single-tank configurations of thermal storage capacities that involve a transfer of mass (open systems) or/and heat (closed/hybrid systems), using simplified dynamic models of different complexity: zero-dimensional, quasi-one-dimensional and one-dimensional. [PERSON] et al. [7] compared analytical approach solutions derived from the one-dimensional two-phase (1D-2P) without heat loss model and one-dimensional one-phase (1D-1P) with heat loss model with experimental data, and found that the local thermal equilibrium assumption is inappropriate in the thermocline tank. [PERSON] et al. [8] proposed a new criterion for quantifying thermocline thickness and defined an ideal charging diffuser. The accuracy of the obtained results was validated against available experimental data and a good agreement was observed. [PERSON] et al. [9] applied a comprehensive laminar and k-\(\epsilon\) turbulent flow energy transport model to calculate the stability of the thermocline, and found that the \(\mathrm{Re}=1\) provides better stability in the axial and radial direction as well as diagonal than other Reynolds numbers. [PERSON] et al. [10] numerically studied the effects of an inlet inertial jet on the thermal blending of hot and cold heat transfer fluid (m molten salt) for a single tank sensible thermal energy storage system. These results revealed that the single tank thermocline storage performance can be improved for higher charging/discharging rates using hemispherical diffusers. [PERSON] et al. [11] adopted the computational fluid dynamics method to study fluid dynamics and thermal performance of a new ternary molten salt of \(\mathrm{KNO_{3}}\)-\(\mathrm{NaNO_{3}}\)-\(\mathrm{NaNO_{2}}\) in a heat storage single tank with a thermocline. [PERSON] et al. [12] numerically analyzed the thermocline characteristics of the thermal storage tank during the actual operation. The results showed that the thermocline thickness increases with the operating time and the growth rate gradually slows down. [PERSON] et al. [13] numerically studied the influence of the number and the diameter of openings, the diameter of the water distributor, and the ratio of height to diameter of the tank on the discharging performance of the regenerator. The results showed that the greater the number of openings, the larger the opening diameter, or the larger the hole diameter, the thinner the thermocline. [PERSON] et al. [14] designed a water single-tank thermocline thermal energy storage experimental system. They investigated the process including discharging, dissipation, cyclic operation, and simultaneous charging and discharging by numerical simulation totally. Their results indicated that as the number of cycles increases the thermocline thickness increases continuously. [PERSON] et al. [15] established thermal storage tank models under different working conditions.