Heat engineering; a text book of applied thermodynamics for engineers and students in technical schools . guide. Fig. 40 shows the construction of an intercooler, through whichthe air must pass from one stage to another and give up its the arrangement of baffle-plates and partitions the air andwater are made to take a circuitous path so as to be moreefficient in the removal of heat. The moisture which separates 122 HEAT ENGINEERING as the air is cooled is usually caught as shown in the figure so thatit will not pass over into the next stage. In many cases an after cooler, Fig. 40, is u
Heat engineering; a text book of applied thermodynamics for engineers and students in technical schools . guide. Fig. 40 shows the construction of an intercooler, through whichthe air must pass from one stage to another and give up its the arrangement of baffle-plates and partitions the air andwater are made to take a circuitous path so as to be moreefficient in the removal of heat. The moisture which separates 122 HEAT ENGINEERING as the air is cooled is usually caught as shown in the figure so thatit will not pass over into the next stage. In many cases an after cooler, Fig. 40, is used after the laststage to remove more of the moisture from the air and to cool itbefore it passes into the transmission line. In this way the airis of smaller volume and there is less friction. Fig. 41 illustrates the arrangement of the Taylor hydraulicair compressor. In this a system for the flow of water mustexist. Suppose the dam A gives a head of H feet and this causeswater to flow through the pipes B, C, D, E to the tail race head and friction will cause a certain flow through the system. Fig. 41.—Taylor hydraulic air compressor. and if the pipe is necked at C the velocity may become so highthat a vacuum is formed at this point and air is drawn in throughopenings placed here. The air enters from G. This air mixeswith the water and when the velocity is decreased in H the airseparates out and rises to the surface of the water. This air isunder pressure due to the head h on the chamber G. The air istaken out through the pipe I. The Humphrey apparatus is described in Engineering,Vol. LXXXVIII, p. 737, and in Compressed Air Practiceby Richards. In all of these forms of apparatus the volume of air takenin might be the same while that discharged is determined by itspressure and temperature. To give some idea of the amount of AIR COMPRESSORS 123 air used by tools or machines and the amount handled by thecompressor it is customary to reduce the air to some one standardcond
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