An aerial, marine or land vehicle, comprising: - a compartment to be cooled; and - a first circuit through which a coolant can pass; said first circuit, in turn, comprising: - a heat exchanger, which can be fed with said coolant and is adapted to enable said coolant to release heat; - a second circuit, which can be fed with a second flow of a heat-carrying fluid and is thermally coupled to said heat exchanger; and - supply means for supplying water inside said second flow in a position upstream of said heat exchanger and spaced from said heat exchanger, proceeding along the feed direction of said second flow along said second circuit, so as to cause evaporation of said water and cool said second flow in said heat exchanger; said first circuit being closed, and the coolant being capable of changing phase passing through it; said coolant performing, in use, a thermodynamic vapour compression cycle inside said first circuit; said first circuit comprising, in sequence: - compressor means, which can be fed with said coolant in the vapour phase and can be activated to raise the pressure of said coolant in the vapour phase; - a condenser defining said heat exchanger, arranged downstream of said compressor means, with reference to the feed direction of said coolant in said first circuit, and which can be fed with said coolant in the vapour phase and is adapted to cause the transition of said coolant from the vapour phase to the liquid phase; - thermal expansion means arranged downstream of said condenser with reference to said feed direction, which can be fed with said coolant in the liquid phase and are adapted to cause the transition of said coolant to a two-phase condition (L+V) formed by a mixture of a liquid phase and a vapour phase; and - an evaporator arranged downstream of said thermal expansion means and upstream of said compressor means, with reference to said feed direction, and adapted to cause the transition of said coolant from said two-phase condition (L+V) to the vapour phase; said vehicle further comprising: - a third circuit adapted to feed said water to said supply means; and - a fourth circuit, which can be fluidically connected to said compartment; said fourth circuit comprising: - an inlet, which can be fluidically connected to said compartment and which can be fed with a first flow of air to be cooled; and - an outlet which can be fluidically connected to said compartment and through which the cooled said first flow of air can pass; said evaporator being interposed along said fourth circuit between said inlet and said outlet, and being thermally coupled to said fourth circuit so as to cool said first flow of air; characterized in that the vehicle further comprises a first tank of said water fluidically connected to said third circuit; and, optionally, said third circuit being fluidically connectable to a second tank arranged outside said vehicle for supplying said water to said supply means. - a compartment to be cooled; and - a first circuit through which a coolant can pass; - a heat exchanger, which can be fed with said coolant and is adapted to enable said coolant to release heat; - a second circuit, which can be fed with a second flow of a heat-carrying fluid and is thermally coupled to said heat exchanger; and - supply means for supplying water inside said second flow in a position upstream of said heat exchanger and spaced from said heat exchanger, proceeding along the feed direction of said second flow along said second circuit, so as to cause evaporation of said water and cool said second flow in said heat exchanger; - compressor means, which can be fed with said coolant in the vapour phase and can be activated to raise the pressure of said coolant in the vapour phase; - a condenser defining said heat exchanger, arranged downstream of said compressor means, with reference to the feed direction of said coolant in said first circuit, and which can be fed with said coolant in the vapour phase and is adapted to cause the transition of said coolant from the vapour phase to the liquid phase; - thermal expansion means arranged downstream of said condenser with reference to said feed direction, which can be fed with said coolant in the liquid phase and are adapted to cause the transition of said coolant to a two-phase condition (L+V) formed by a mixture of a liquid phase and a vapour phase; and - an evaporator arranged downstream of said thermal expansion means and upstream of said compressor means, with reference to said feed direction, and adapted to cause the transition of said coolant from said two-phase condition (L+V) to the vapour phase; - a third circuit adapted to feed said water to said supply means; and - a fourth circuit, which can be fluidically connected to said compartment; - an inlet, which can be fluidically connected to said compartment and which can be fed with a first flow of air to be cooled; and - an outlet which can be fluidically connected to said compartment and through which the cooled said first flow of air can pass;