Power from mercury vapor

The author describes a thermodynamic process using a mercury boiler in tandem with a steam-generating apparatus for the production of power. As mercury boils at 677 deg. fahr. at atmospheric pressure and condenses in a 28-in. vacuum at 455 deg. fahr., its temperature and pressure characteristics make possible the utilization of some of the energy available in ranges above those practicable for steam apparatus. The object of the new development is therefore to increase efficiency, by increasing greatly the temperature range available. The mercury vapor produced in the boiler passes to the nozzles of a turbine which drives a generator or other utilizer of power, and thence to a condensing boiler, where it is condensed to liquid mercury on the outer surface of tubes which contain water. The heat given up by the mercury vaporizes the water, and the steam produced is used to drive other turbines or for any other purpose. The author describes the experimental development of the mercury boiler, which is of such a design as to require the least possible amount of mercury. Means are provided to guard against the loss of mercury at any of the joints, and for immediately detecting any leakage if it should occur. The advantages and disadvantages of the process are discussed, and the most advantageous size of unit for commercial application.