. American engineer and railroad journal . enters the tank through globe valve No. 2, expands, andgives up its heat arising therefrom to the walls of the tank,the latter in turn radiating it to the shop atmosphere. In such April, 1911. AMERICAN ENGINEER AND RAILROAD JOURNAL. 139 a manner refrigeration is, of course, taking place to a small extent. The purely cold liquid is forced by the air pressureabove it through pipe No. s, through needle valve No. i andnozzle No. 3 to the burner. On its way to the burner afterleaving the nozzle the liquid gasoline is picked up by the gustsof compresed air
. American engineer and railroad journal . enters the tank through globe valve No. 2, expands, andgives up its heat arising therefrom to the walls of the tank,the latter in turn radiating it to the shop atmosphere. In such April, 1911. AMERICAN ENGINEER AND RAILROAD JOURNAL. 139 a manner refrigeration is, of course, taking place to a small extent. The purely cold liquid is forced by the air pressureabove it through pipe No. s, through needle valve No. i andnozzle No. 3 to the burner. On its way to the burner afterleaving the nozzle the liquid gasoline is picked up by the gustsof compresed air from the by-pass which comes through valveNo. 4, and the gasoline becomes still further refrigerated, ashere the compressed air expands from a pressure of about 100pounds to practically that of the atmosphere, and the absorbtionof heat must be considerable. During this process the gasoline has not been vaporized, butmerely dispersed into globules through the fanning action ofthe refrigerated air. When this mixture of globules and air ^=ct. reach the burner, the globules which happen to be small enoughwill ignite, but the larger ones are checked by the walls of theburner to run out on the floor, where part soaks into the woodor earth and the others evaporate or become ignited. This, andthe radiation of heat, are the main sources of loss, but theformer is by far the greater. The loss of the liquid gasoline can be overcome entirely byarranging the heating apparatus as shown in Fig. 2. Instead ofthe compressed air coming in on top of the gasoline it shouldbe vice z-crsa^ entering through the valve (B) to the pipe, whichextends very close to the bottom, and bubbling up through theliquid. The tank should have a coil of pipe and the coil jack-eted so that when steam is allowed to circulate in the coil heatwill not radiate into the shop atmosphere. Then, as the airwould bubble up through the liquid gasoline and excelsior, theformer would become broken up into globules, and finally va-p
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
