So outside the box, only the water to be cooled is transmitted to the cooler and back and the resulting electric current. The heat can be supplied outside the box at normal atmospheric pressure. The efficiency of the device increases 10 times (or 100).
The steam does not go anywhere, because it is in a closed circuit, and the water is similar, it does not need to be topped up, but only cooled ..
Such "boxes" can be installed downstairs in mines to produce electricity .. with high efficiency .. But basically any source of heat can be used ..
The second law of thermodynamics, she forgot to say that the efficiency of a heat engine depends not only on the temperature difference, but also largely on the pressure at which the system works.
The Feliks-Newcomen formula.
https://youtu.be/zd5uDlfDwgc?t=369
Andrew