Plant for producing mechanical energy from a carrier fluid under cryogenic conditions

A method for producing mechanical energy from a carrier fluid under cryogenic conditions, comprising the preliminary steps of:

• preparing a cryogenic tank containing a fluid at a cryogenic temperature Tcryo and a pressure level Pcryo;
• preparing a capacitive tank;
• preparing an engine body designed to house an expansion phase and a compression phase;
• supplying said capacitive tank with a mass M2 at a pressure level Prec and a supply temperature Trec;
• said method also comprising the cyclical steps of:
• raising the pressure of the carrier fluid from the Pcryo level to the Pproc level, where Pproc is greater than Pcryo and Prec;
• raising the temperature of the carrier fluid from Tcryo to a first process temperature Tproc1, where Tproc1 is greater than Tcryo;
• raising the temperature of the carrier fluid from Tproc1 to a second process temperature Tproc2, where Tproc2 is greater than Tproc1;
• supplying the capacitive tank with a mass M1 of working fluid at the temperature Tproc2 and pressure level Pproc;
• mixing the masses M1 and M2 of carrier fluid, obtaining a mass M1+M2 at the supply temperature Tfeed and pressure level Pfeed;
• supplying said mass M1+M2 of carrier fluid at the pressure level Pfeed and supply temperature Tfeed from the capacitive tank to the engine body;
• expanding the mass M1+M2 of carrier fluid in the engine body, so as to lower the pressure from the level Pfeed to the level Pex, wherein Pex is less than Pfeed, and to lower the temperature from Tfeed to Tex, wherein Tex is less than Tfeed, producing mechanical energy;
• discharging the mass M1 of fluid towards an external environment;
• compressing the mass M2 of fluid so as to raise the pressure from the level Pex to the level Prec and so as to raise the temperature from Tex to Trec to supply said capacitive tank with said mass M2 at the pressure level Prec and supply temperature Trec.