. Journal. c pressure. Fig. 1shows a set of curves giving the relation oftemperature and resistance for raw water from Chart of Resistance Tests of Water •vf* I inoe of raw river of eon: make-up water. ISO100 BO 5 eo p a 20500 \ AJ B, S \ \ S 1000 1500 2000 Resistance—ohms per CD. In. Fio. 1 3000 4000 the St. Maurice River and for condensate watermixed with about 25 per cent, of raw waterfrom the same source I sing a logarithmic scale, the curves appearas straight lines, and in many other tests, of Vol. XU, No. 19] REVIEW 413n which the results are not shown in the diagram,i
. Journal. c pressure. Fig. 1shows a set of curves giving the relation oftemperature and resistance for raw water from Chart of Resistance Tests of Water •vf* I inoe of raw river of eon: make-up water. ISO100 BO 5 eo p a 20500 \ AJ B, S \ \ S 1000 1500 2000 Resistance—ohms per CD. In. Fio. 1 3000 4000 the St. Maurice River and for condensate watermixed with about 25 per cent, of raw waterfrom the same source I sing a logarithmic scale, the curves appearas straight lines, and in many other tests, of Vol. XU, No. 19] REVIEW 413n which the results are not shown in the diagram,it was found that these line ; were all very nearlyparallel. This would indicate that the samegenera] law applies to all kinds of water. Thecurses have been verified above 100° C. bytests on steam-generators under pressure. Figure 2 shows a section of a 50(H) , consisting of a vertical cylindricaltank with an extension at the bottom. The Electric Steam GeneratorThree-plMSO single unit system. Fig. 2 upper part is flanged, and to it is bolted a dishedcover which contains three openings for theporcelain bushings that insulate the threecopper conductors leading to the electrodes. The insulator bushing consists of three parts :two corrugated sleeves, one of which is outsideand the other inside the tank, and a tube insidethese sleeves, the whole being held together bythe shoulder and nut of the conductor passingthrough. The arrangement shown in Fig. 2is for 1300 amps., 2200 volts, 3-phase, 60 cycles,and for a working pressure of 165 lb. persq. in. ; the electric current passes throughfrom both sides of the electrode to the insideand outside cylinders, and to a much smallerextent directly from electrode to electrode. This type of generator requires but little floorspace ; the 5000 kw. generator with electriccontrol apparatus can easily be placed in anarea 10 X 12 ft., and the 18,000 kw. generator,equal to 1800 boiler horse-power, with all its accessories, needs a floo
Size: 1300px × 1922px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
