Plant for energy management, comprising: a working fluid other than atmospheric air; at least one casing configured to store the working fluid in gaseous phase and in equilibrium of pressure with the atmosphere; at least one tank configured to store the working fluid in liquid or super-critical phase with a temperature close to its own critical temperature; ducts operationally interposed between the casing and the tank and connecting, directly and/or indirectly, the casing with the tank; wherein the ducts delimit: at least one charge path extending from the casing to the tank, at least one discharge path extending from the tank to the casing, and at least one closed circuit in fluid communication with the discharge path and with the charge path; at least one expander arranged along the ducts and configured to expand the working fluid; at least one compressor arranged along the ducts and configured to compress the working fluid; heat exchangers (8, 9, 10, 11) arranged along the ducts and configured to transfer heat to the working fluid or to absorb heat from the working fluid; wherein the plant is configured to actuate a closed cyclic thermodynamic transformation with the working fluid, first in one direction in a charge configuration and then in the opposite direction in a discharge configuration, between said casing and said tank; wherein the plant is also configured to actuate at least one closed thermodynamic cycle in said closed circuit with said working fluid, optionally while said plant is in the charge or discharge configuration; characterized in that the plant comprises at least one combustion chamber arranged along the ducts and configured to actuate an oxy-combustion and to heat the working fluid therewith; and in that the combustion chamber is operationally active at least in the closed circuit to heat the working fluid through an oxy-combustion within the closed thermodynamic cycle and/or the closed cyclic thermodynamic transformation during charging. a working fluid other than atmospheric air; at least one casing configured to store the working fluid in gaseous phase and in equilibrium of pressure with the atmosphere; at least one tank configured to store the working fluid in liquid or super-critical phase with a temperature close to its own critical temperature; ducts operationally interposed between the casing and the tank and connecting, directly and/or indirectly, the casing with the tank; wherein the ducts delimit: at least one charge path extending from the casing to the tank, at least one discharge path extending from the tank to the casing, and at least one closed circuit in fluid communication with the discharge path and with the charge path; at least one charge path extending from the casing to the tank, at least one discharge path extending from the tank to the casing, and at least one closed circuit in fluid communication with the discharge path and with the charge path; at least one expander arranged along the ducts and configured to expand the working fluid; at least one compressor arranged along the ducts and configured to compress the working fluid; heat exchangers (8, 9, 10, 11) arranged along the ducts and configured to transfer heat to the working fluid or to absorb heat from the working fluid; wherein the plant is configured to actuate a closed cyclic thermodynamic transformation with the working fluid, first in one direction in a charge configuration and then in the opposite direction in a discharge configuration, between said casing and said tank; wherein the plant is also configured to actuate at least one closed thermodynamic cycle in said closed circuit with said working fluid, optionally while said plant is in the charge or discharge configuration; characterized in that the plant comprises at least one combustion chamber arranged along the ducts and configured to actuate an oxy-combustion and to heat the working fluid therewith; and in that the combustion chamber is operationally active at least in the closed circuit to heat the working fluid through an oxy-combustion within the closed thermodynamic cycle and/or the closed cyclic thermodynamic transformation during charging.