Compressed air; theory and computations . ank is emptied the other willbe filled, at which time the switch will automatically reverse theoperation. The economic advantage of the system lies in the fact that theexpansive energy in the air is not lost as in the ordinary dis-placement pump (Art. 37). The compressor takes in air at vary-ing degrees of compression while it is exhausting the tank. The mathematical theory, and derivation of formulas forproportioning this style of pump are quite complicated butinteresting. 70 COMPRESSED AIR Preliminary to a mathematical study for proportioning theinst
Compressed air; theory and computations . ank is emptied the other willbe filled, at which time the switch will automatically reverse theoperation. The economic advantage of the system lies in the fact that theexpansive energy in the air is not lost as in the ordinary dis-placement pump (Art. 37). The compressor takes in air at vary-ing degrees of compression while it is exhausting the tank. The mathematical theory, and derivation of formulas forproportioning this style of pump are quite complicated butinteresting. 70 COMPRESSED AIR Preliminary to a mathematical study for proportioning theinstallation it is well to follow a cycle in its operation: Referringto the two tanks, Fig. 13, as A and B, assume tank A to be fullof air at a pressure sufficient to sustain the back pressure or headof the discharge water column and tank B to be full of air compressor is running and taking the compressed airout of A and passing it over into B. At this stage (the beginningof a cycle) no work is demanded of the air compressor except. Water-
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