Monotube steam generator

[1] For the sake of efficiency, it is desirable to minimise the steam content of the generator.

Heat can then be transferred efficiently into liquid water, rather than into low-density steam.

Monotube steam generators may either boil gradually along their length, usually pumped circulation systems,[2] but where this boiling does not disrupt the circulation.

Otherwise they can use the Benson supercritical system, where the pressure is sufficient to prevent boiling (within the heated volume) altogether.

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