Show Electrically Heated Healed Stear Boiler That Is 1 s 98 Per Cent Efficient PT THE lIE prohibitive price of coal andt and t tho the abundance of ot water power in Italy have stimulated tho engineers of or that country to some most Ingeni ingeni- ous devices for running running running run run- ning their machinery Tho The picturesque and daring but quite successful she suc attempt to run runa a huge factory on power derived from a harnessed volcano has already been described in this magazine Now comes cornea Col Revel Re of oC tho the Italian Army Array with witban an steam boiler boller boil boll er which is hailed b by Engineering of ot London Lou Lon Loudon don and the Electrical Experimenter of ot New C NewYork York as not only successful suc sue and simple but as extraordinarily efficient t. t The Electrical Ex- Ex Exper per en ter remarks that while the tho efficiency efficiency effi effi- clency of the average coal lined fired boiler is only about 50 GO or GO CO COper GOper GOper per cent In Co Col Coi I. I Revels Revel's boiler steam Is produced by the passage of ot electricity r through water at the almost unbelievable efficiency of ot 98 per percent cent That la IQ n ns b n ne i- i Ing the electric energy into heat and I thence into steam The semi sectional view here I I shown will aid In understanding ju just t PASS'S 4 Cf D i Z p t 1 i r Q tl ELECTRODES Ft J raw iN pr iNLET NOZZLE COLD j PEED v. d W. bt LEVEL N. N o TO HAND MR CONTROL LEVER SAFETY ANO RI N E This illustrate graphically lust just how hou the boiler steam l by y the r passage of 0 an electric carrent carrent car car- rent through h the water atu t een the circular r nt metal 1 plates The resistance of the hI nater aln to the ic pua passage of thi th current curent causes steam dram to form forn I w ww cent of ot the energy In tho the electric curent cur- cur current rent ent sent through the water is actually diverted Into steam The principal feature of ot this generator generator generator gener gener- ator Is utilization of ot the reI resistance re- re I Istance of the water for Cor transform transform- I hew this simple yet et wonderful device operates Tho The working drawing shows o one e of oC these apparatus tal taking I IS S current a at a pressure of ot volts In which we I find the following arrangement At Atthe Atthe Atthe the centre contre as shown there Is an elec elc I an and steam space at the bottom a cold water space Through the thc steam dome cover run three brass rods rod electrically insulated from th the cover In the steam and electrode chamber chamb r there ther are three sets of ot circular steel electrodes separated a short distance and rigidly fixed to the rods shown Next ext we find rInd a vertical steam pipe and steam pipe support and ba bathe le a I water feed injector a steam valve a awater awater I I water gauge a pressure gauge gaube a r re receiver receiver er ce for Cor soda solution a water level lovd regulator which automatically automatically governs gov governs gov- gov erns ems the working of or the apparatus a safety and drain valve a handle for tor working this valve alve by hand and n a water feed valve val The transformation of electrical energy Into heat takes place in tn the body of or the water contained in the steam and chamber the water acting as an resistance inserted between the electrodes the production of ot steam therefore varies varIeD with the Immersed surface of the electrodes ele elec and assumes all values between zero and the maximum corresponding with the various levels of the water in the steam chamber For starting the generator the circuit circuit cir cir- cult breaker Is closed the feed teed water valve Is opened and and and-a anda a small quantity of soda solution is introduced from the small receiver to give a suitable conductivity to the water When the water has reached the height of ot the lower edge of ot the electrode segments the current flows through the water and commences 5 to raise steam the steam production increasing as the water level rises until it reaches the working pressure required At this moment the automatic regulator enters enters en en- Into action actton and the water level hence the steam production remain constant |