Methods and apparatus for pressure control systems in pressure vessels

A non-transitory machine readable storage medium comprising instructions to cause programmable circuitry to at least:

• determine, based on a temperature of a cryogenic tank and a property of the cryogenic tank, a threshold pressure of the cryogenic tank;
• determine a threshold rate of change of pressure of the cryogenic tank;
• compare a current pressure of the cryogenic tank to the threshold pressure;
• and
• after determining that one of (a) the current pressure of the cryogenic tank does not satisfy the threshold pressure or (b) a current rate of change of the pressure of the cryogenic tank does not satisfy the threshold rate of change, actuate a valve fluidly coupled to the cryogenic tank until the current pressure satisfies the threshold pressure and the current rate of change satisfies the threshold rate of change.

A method comprising:

• determining, based on a temperature of a cryogenic tank and a property of the cryogenic tank, a threshold pressure of the cryogenic tank;
• determining a threshold rate of change of pressure of the cryogenic tank;
• comparing a current pressure of the cryogenic tank to the threshold pressure;
• and
• after determining that one of (a) the current pressure of the cryogenic tank does not satisfy the threshold pressure or (b) a current rate of change of the pressure of the cryogenic tank does not satisfy the threshold rate of change, actuating a valve fluidly coupled to the cryogenic tank until the current pressure satisfies the threshold pressure and the current rate of change satisfies the threshold rate of change.