Refrigeration system having a refrigeration cycle which provides optimized consumption

A method for cooling at least one refrigeration cell by means of a refrigeration system, comprising the steps of:

• starting from a condition in which a first auxiliary reservoir is filled with a liquefied gas and a second auxiliary reservoir is empty, introducing a refrigerant gas, by means of an auxiliary compressor, in an auxiliary condenser in which said gas is condensed and sent to said first auxiliary reservoir, pressurizing said liquefied gas contained therein;
• transferring the content of said first auxiliary reservoir to at least one expansion valve in order to reach at least one evaporator of said at least one refrigeration cell;
• drawing, by means of a main compressor, refrigerant gas from a low-pressure intake line and sending said refrigerant gas to a main condenser and then to said second auxiliary reservoir, filling it;
• and
• transferring the contents of said second auxiliary reservoir to said at least one expansion valve, in order to send them to said at least one evaporator.