A system for cooling an object with nitrogen having a critical point defined by a critical-point pressure and a critical-point temperature, wherein the system comprises: a plurality of cryogen generators (512-1, 512-2) adapted to increase a pressure of the nitrogen; a plurality of valves (216, 504), each such valve provided at an outlet of a respective one of the plurality of cryogen generators and adapted to release a flow of nitrogen when the pressure of nitrogen within the respective one of the plurality of cryogen generators exceeds a predetermined pressure, the predetermined pressure being greater than a pressure value determined to provide the nitrogen at a reduced molar volume that prevents vapor lock; each such cryogen generator comprising a heating element for applying heat within an interior volume of a tank of said cryogen generator; a cryogenic application device adapted to be brought into thermal communication with the object; a conduit in fluid communication with each of the plurality of valves to selectively transport the nitrogen from the valve to the cryogenic application device in accordance with the states of the valves; and a flow controller to regulate flow of nitrogen through the conduit and cryogenic application device, wherein said cryogen generators, said plurality of valves, and said flow controller cooperatively operate to (a) raise a pressure of the nitrogen to between 0.8 and 1.2 of its 33.94 bar critical-point pressure and provide the nitrogen at a temperature within ± 10% of its - 147.15° C critical-point temperature; (b) reduce a temperature of the nitrogen without decreasing the pressure of the nitrogen below 0.8 times its 33.94 bar critical-point pressure; (c) place the nitrogen in thermal communication with the object in order to increase the temperature of the nitrogen to an ambient temperature along a thermodynamic path that maintains a pressure greater than 0.8 times the 33.94 bar critical-point pressure for a duration that the nitrogen and object are in thermal communication; (d) remove the nitrogen from thermal communication with the object; and (e) reduce the pressure of the nitrogen to an ambient pressure. a plurality of cryogen generators (512-1, 512-2) adapted to increase a pressure of the nitrogen; a plurality of valves (216, 504), each such valve provided at an outlet of a respective one of the plurality of cryogen generators and adapted to release a flow of nitrogen when the pressure of nitrogen within the respective one of the plurality of cryogen generators exceeds a predetermined pressure, the predetermined pressure being greater than a pressure value determined to provide the nitrogen at a reduced molar volume that prevents vapor lock; each such cryogen generator comprising a heating element for applying heat within an interior volume of a tank of said cryogen generator; a cryogenic application device adapted to be brought into thermal communication with the object; a conduit in fluid communication with each of the plurality of valves to selectively transport the nitrogen from the valve to the cryogenic application device in accordance with the states of the valves; and a flow controller to regulate flow of nitrogen through the conduit and cryogenic application device, wherein said cryogen generators, said plurality of valves, and said flow controller cooperatively operate to (a) raise a pressure of the nitrogen to between 0.8 and 1.2 of its 33.94 bar critical-point pressure and provide the nitrogen at a temperature within ± 10% of its - 147.15° C critical-point temperature; (b) reduce a temperature of the nitrogen without decreasing the pressure of the nitrogen below 0.8 times its 33.94 bar critical-point pressure; (c) place the nitrogen in thermal communication with the object in order to increase the temperature of the nitrogen to an ambient temperature along a thermodynamic path that maintains a pressure greater than 0.8 times the 33.94 bar critical-point pressure for a duration that the nitrogen and object are in thermal communication; (d) remove the nitrogen from thermal communication with the object; and (e) reduce the pressure of the nitrogen to an ambient pressure. (a) raise a pressure of the nitrogen to between 0.8 and 1.2 of its 33.94 bar critical-point pressure and provide the nitrogen at a temperature within ± 10% of its - 147.15° C critical-point temperature; (b) reduce a temperature of the nitrogen without decreasing the pressure of the nitrogen below 0.8 times its 33.94 bar critical-point pressure; (c) place the nitrogen in thermal communication with the object in order to increase the temperature of the nitrogen to an ambient temperature along a thermodynamic path that maintains a pressure greater than 0.8 times the 33.94 bar critical-point pressure for a duration that the nitrogen and object are in thermal communication; (d) remove the nitrogen from thermal communication with the object; and (e) reduce the pressure of the nitrogen to an ambient pressure.