. Electric railway journal . THREE-PHASE IN PRACTICE—FIG. 3—PROPORTION OFENERGY ABSORBED AND REGENERATED = 14 per cent of the generated energy. Although thisenergy is not a very large amount, yet the saving inactual money is fairly large as the electric energy isproduced by a steam plant and the cost of coal in Italy. THREE-PHASE IN PRACTICE—FIG. 4—WATER RHEOSTAT AT CENTRAL STATION DISSIPATING REGENERATED ENERGY two locomotives at a speed of 28 , with the expen-diture of energy shown in Fig. 2, the regenerated en-ergy amounted to per cent of the absorbed energy;that is to say, on th
. Electric railway journal . THREE-PHASE IN PRACTICE—FIG. 3—PROPORTION OFENERGY ABSORBED AND REGENERATED = 14 per cent of the generated energy. Although thisenergy is not a very large amount, yet the saving inactual money is fairly large as the electric energy isproduced by a steam plant and the cost of coal in Italy. THREE-PHASE IN PRACTICE—FIG. 4—WATER RHEOSTAT AT CENTRAL STATION DISSIPATING REGENERATED ENERGY two locomotives at a speed of 28 , with the expen-diture of energy shown in Fig. 2, the regenerated en-ergy amounted to per cent of the absorbed energy;that is to say, on this section of the line the trainscoming down grade regenerate more than half of theenergy they absorb when going up grade. If we as-sume only two trains on this section, one ascending andone descending, Fig. 3 shows respectively the energyabsorbed, the energy regenerated and the differencebetween the two. But, as already mentioned, the really important fig-ures are those which represent the saving effected byregeneration in the energy produced at the central sta-tion. This saving, of course, depends on the totaltraffic in both directions and on the way the schedule isarranged for a given service. The Giovi line is notparticularly fortunate in this respect, as most of thetraffic is in the up-grade direction
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