Evening Republican, Volume 22, Number 293, Rensselaer, Jasper County, 6 December 1919 — Boilers Heated by Electricity. [ARTICLE]

Boilers Heated by Electricity.

The curious anomaly of steam boilers heated by electricity is attracting serious attention in certain localities. Such boilers have been set up of capacities up to 1,500 kilowatts, or 2,000 horse-power, taking electric current of voltages up to 10,000, aud offer advantages where coal is high and waterpower cheap, as In certain woodpulp and paper factories of northern Europe. Steam is generated by passage of the electric current through water. Narrow vertical tubes of insulating material contain water, and are connected at top and bottom with the Interior of the boiler. Alternating current is sent through the water columns, the tubes with three-phase currents being connected in groups of three. Moving the electrodes in the tubes regulates the current strength. An efficiency of 95 per cent is Claimed and one watt of electric energy to stated to produce nearly four pounds of steam.