. The steam-engine and other heat-motors . ? ? FlG. 125.— Induced Circulation Counter-current Condenser. 238 THE STEAM-ENGINE AND OTHER HEAT-MOTORS. sugar-houses, condensed-milk factories, and in chemical industrieswhere there is much boiling done at pressures less than Fig. 128.—Alberger Barometric Condenser. Syphon, Ejector, or Injector Condensers.—A remarkable degreeof vacuum may be obtained, without the use of an air-pump, bymeans of condensers of the form shown in Fig. 127. Its most im-portant and essential feature is a suction-gill, so arranged thatthe steam
. The steam-engine and other heat-motors . ? ? FlG. 125.— Induced Circulation Counter-current Condenser. 238 THE STEAM-ENGINE AND OTHER HEAT-MOTORS. sugar-houses, condensed-milk factories, and in chemical industrieswhere there is much boiling done at pressures less than Fig. 128.—Alberger Barometric Condenser. Syphon, Ejector, or Injector Condensers.—A remarkable degreeof vacuum may be obtained, without the use of an air-pump, bymeans of condensers of the form shown in Fig. 127. Its most im-portant and essential feature is a suction-gill, so arranged thatthe steam, vapor, and air may be drawn into the discharge- CONDENSERS AND AIR-PUMPS. 239 water. This action is due to the high velocity of the water enteringthe contracted orifice above the gill, and since the sum of thestatic, velocity, and friction heads must be constant, it is evidentthat if the velocity-head is increased the static head will be de-creased. In tests made with an injector-condenser of this type in winterin New York the condenser pressures varied from pound to
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