Electrical news and engineering . e boiler, the price whicli could be paidfor electric energy would be mils per If therefore, a supply of power is available at a price not greaterthan mils per in a plant where coal costs $8 perton or more, the production of steain by electric power iscommercially feasible. Electric Steam Generator Construction The water resistance electric steam generator consistsessentially of a closed pressure vessel to which is connecteda source of water supply, and from which water may bedrawn off at the bottom and steam at the top. In this vesselelec
Electrical news and engineering . e boiler, the price whicli could be paidfor electric energy would be mils per If therefore, a supply of power is available at a price not greaterthan mils per in a plant where coal costs $8 perton or more, the production of steain by electric power iscommercially feasible. Electric Steam Generator Construction The water resistance electric steam generator consistsessentially of a closed pressure vessel to which is connecteda source of water supply, and from which water may bedrawn off at the bottom and steam at the top. In this vesselelectric energy is made to flow through -the water from anelectrode in the form of a plate, or tuljc. to the shell of theshell of the vessel, or to the metallic inner lining. Alter-nating current energy is used at a pressure varying from110 up to volts. The generators are constructed forthe use of 3-phase poW-er, either by ennploying three elec- Viev / of electri steam generator in pla It of Laur entide Co. Ltd Grand Mere, Que. 38 THE ELECTRICAL NEWS tiodes in one vessel, or by the use of three vessels withone electrode in each, in which case the outer shells areconnected together in star. In this type of generator thereis no heating surface, the generation of steam taking placethroughout the water, and as a consequence no portion ofthe apparatus is at a higher temperature than the tempera-ture of the steam. This is a most important feature fromthe viewpoint of safety and continuity of operation, as canbe readily appreciated. The chief advantages of the water resistance type ofsteam generator over the metallic resistance type arc free-dom from electrical and mechanical troubles, ease of regu-lation and cheapness. This type of generator has recentlybeen further developed and made applicable to conditionson this continent by Mr. F. T. Kaelin, chief engineer oithe Shawinigan Water and Power Co. Units of Mr. Kaelinsdesign, manufactured by the Dominion Engineering Works,Limited,
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