System and method for cryogenic vaporization with parallel vaporizer arrangements

A method for controlling a cryogenic vaporization system, the method comprising the steps of:

• receiving, via a plurality of control valves, a liquid cryogen at banks of ambient air vaporizers selected from a first bank of ambient air vaporizer units, a second bank of ambient air vaporizer units, and a third bank of ambient air vaporizer units connected in parallel arrangement;
• and
• vaporizing the liquid cryogen in two of the first bank of ambient air vaporizer units, the second bank of ambient air vaporizer units, and/or the third bank of ambient air vaporizer units to create one or two streams of cryogenic vapor while concurrently defrosting one of the first bank of ambient air vaporizer units, the second bank of ambient air vaporizer units, and/or the third bank of ambient air vaporizer units;
• combining the one or two streams of cryogenic vapor;
• heating the combined streams of cryogenic vapor in a downstream vaporizer comprising a water bath vaporizer or a fourth bank of ambient air vaporizer units disposed downstream and in series with the first, second, and third banks of ambient air vaporizer units;
• and
• outputting a superheated vapor from the downstream vaporizer.