Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. . then goes to the hot well for use in the boilers jet condensers are used the condensed steam and condensing waterare mixed and there is but a small proportion of the water usedagain. Jet condensers, while simple in construction, can only beused where the water is reasonably pure.
Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. . then goes to the hot well for use in the boilers jet condensers are used the condensed steam and condensing waterare mixed and there is but a small proportion of the water usedagain. Jet condensers, while simple in construction, can only beused where the water is reasonably pure. Circulating Water. The circulating water for the condenserscomes from a stream or from a reservoir in connection with a cool-ing tower. It is pumped through the condenser either by a pump orby its own weight (as in the barometric type). After this it flows 258 ELECTRIC RAILWAYS 161 out again, being either wasted or returned to the cooling tower togive up its acquired heat. If jet condensers are used the water ispartly returned to the hot-well for boiler feed and partly returnedto the source of supply, as above. Power Circuit. The power circuit begins at the engine wheremechanical power is transferred to electrical power. From thegenerator the power flows through the electrical circuit to the switch-. Fig. 144. Diagram of the Principal Elements in a Small Power Station board, thence to the transformers, if any/are used, and it finallyreaches the outside circuit. Before doing so it may be convertedfrom one form to another as, for example, from 3-phase alternatingcurrent to direct current, for railway purposes. 259 162 ELECTRIC RAILWAYS HEAT AND OTHER ENERGY TRANSFORMATIONS Transformation of energy in the power plant is extremely in=efficient even with the best management. Fig. 143 shows the largelosses involved in a typical case. Starting with 100 per cent ofenergy in the coal pile, 24 per cent is lost in the boiler room throughthe flue gases, ashes, unburned fuel, radiation, et
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