Thermodynamic system for storing/producing electrical energy

A system for producing and storing electrical energy, said system comprising:

• a thermally insulated chamber comprising a first circuit including a first working fluid circulating therein;
• a hot source and a cold source, wherein said hot source and said cold source are thermally insulated from each other;
• wherein:
• (i) a first leg of the first circuit passes through the hot source for heat exchange between the first working fluid in the first leg and the hot source;
• (ii) a second leg of the first circuit passes through the cold source for heat exchange between the first working fluid in the second leg and the cold source;
• the first circuit further comprising a third leg that extends between and that is connected in series between the first leg and the second leg and a fourth leg that extends between and that is connected in series between the second leg and the first leg such that said first leg is located between said third and fourth legs and such that said second leg is located between said third and fourth leg;
• the third leg connecting the cold source to the hot source and comprising a pump for circulating the first working fluid in liquid phase;
• the fourth leg connecting the hot source to the cold source and comprising a turbine for circulating the first working fluid in gas phase;
• the hot source comprising a pure water ice slurry always at 0° C.;
• the cold source comprising an ice slurry with a temperature lower than or equal to −40° C.;
• said system further comprising:
• a second circuit in which a second working fluid circulates between the hot source and a constant temperature system located outside the thermally insulated chamber, the constant temperature system being selected from the group comprising:
• ambient air, a water reserve, a water stream, a water course, a waterway;
• an auxiliary expansion valve and an auxiliary compressor for circulating the second working fluid between said constant temperature system and the hot source for heat exchange from the hot source to the constant temperature system.