System for controlling temperature and pressure inside a propellant tank

A system for controlling a temperature and pressure in a propellant tank, comprising:

• a. a first tank;
• b. a cryogenic fluid in the first tank, the cryogenic fluid comprising a liquid portion and a gas portion;
• c. a forced convective vaporization (FVC) device positioned inside the first tank, the FVC device having:
• i. a suction chamber having a first inlet and a first outlet spaced from the first inlet, the first outlet submerged in at least a portion of the liquid portion of the cryogenic fluid;
• ii. a motive nozzle having a second inlet and a second outlet spaced downstream from the second inlet, the second outlet located within the suction chamber, the motive nozzle second inlet configured to receive pressurized motive fluid;
• iii. a mixing tube having a first end and a second end, the first end in fluid communication with the first outlet of the suction chamber and the second end positioned in the gas portion of the cryogenic fluid;
• and
• iv. a valve associated with the first inlet of the suction chamber, the valve having an open position and a closed position wherein the valve moves from the closed position to the open position by the introduction of pressurized motive fluid to the motive nozzle and moves to the closed position by stopping the supply of motive fluid to the motive nozzle.