Sistema per immagazzinare e utilizzare energia termica

The system (100) for storing and using thermal energy has a first closed-loop cycle arrangement which comprises two main storage tanks: a first tank (145) to store heat-storage fluid at low temperature and a second tank (155) to store 5 heat-storage fluid at high temperature. The system (100) comprises also a second thermodynamic cycle arrangement and a third thermodynamic cycle arrangement which can work respectively as a heat pump, to heat in a first heat exchanger the heat-storage fluid at low temperature by consuming electrical energy and store it in the second tank (155), and as a heat engine, to produce 0 electrical energy by cooling in a second heat exchanger the heat-storage fluid at high temperature and store it in the first tank (145).