. The steam-engine and other heat-motors. he suction-chamber of a feed-pump which forces it through the feed-pipe into the boiler. Thereare two principal methods of condensation: (a) By means of a surface condenser.(6) By means of a jet condenser. Surface Condenser and Air-pump.—One form of a surface con-denser with its necessary pumps is shown in Fig. 16. The exhaust-steam from the engine-cylinder enters the condenser at .4. and isdivided into many streams by the scattering-plate 0. The steamis condensed into water by coming into contact with the cooltubes and then flows down pipe B (closed t
. The steam-engine and other heat-motors. he suction-chamber of a feed-pump which forces it through the feed-pipe into the boiler. Thereare two principal methods of condensation: (a) By means of a surface condenser.(6) By means of a jet condenser. Surface Condenser and Air-pump.—One form of a surface con-denser with its necessary pumps is shown in Fig. 16. The exhaust-steam from the engine-cylinder enters the condenser at .4. and isdivided into many streams by the scattering-plate 0. The steamis condensed into water by coming into contact with the cooltubes and then flows down pipe B (closed to spaces V and S) intospace below valves *S. The suction valves, S, open upward. It is well to keep in mind that there is no motion in steam,water, or air unless there is a difference of pressure. The ex-haust-steam flows into the condenser only so long as the pressurethere is less than the pressure in the cylinder. There is no suchtiling as the vacuum drawing or sucking in the steam. Hence we 24 THE STEAM-ENGINE AND OTHER ELEMENTARY PRINCIPLES. 25 Bee that the valve S will remain open only so long as the pressurein the pump is less than the pressure in the condenser decreasedby the pressure necessary to overcome the compression of thespring that tends to seat S. If there is not enough water to fillthe pump, air and steam-vapor will fill the remaining volumeabove the water. On the return-stroke, S will close and valve Vwill open. The air will be forced past the open valve V and willbe followed by such part of the water as is not required to fillthe clearance-space that exists in the cylinder and passagewaybetween the valve V and the piston when on the the chamber above V the air escapes into the atmosphere,and the water runs through a pipe (shown as a dotted circle) tothe hot-well. The vertical pipe at B connects B and space S, butis closed to space V. CirculatingPump.—On the right of the same figure is across-section of a circulating pump. It
Size: 1206px × 2073px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisheretcetc, booksubject
