All About Engines
Forfatter: Edward Cressy
År: 1918
Forlag: Cassell and Company, LTD
Sted: London, New York, Toronto and Melbourne
Sider: 352
UDK: 621 1
With a coloured Frontispiece, and 182 halftone Illustrations and Diagrams.
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The Modern Reciprocating Engine 139
behind the cylinder so that the pump plunger is
driven directly from the piston in the steam engine
cylinder. The exhaust steam enters at a and the
cooling water, in the form of a fine spray, at b. Con-
densation, therefore, takes place in the chamber c,
and air is extracted with every stroke of the pump
With a surface condenser a separate air pump is
employed. The condenser itself is shown diagram-
matically in Fig. 85. The directions of flow of ex-
haust steam and cooling water indicated by arrows
are such as to secure most rapid transfer of heat and
the greatest uniformity of temperature. Moreover,
brass, which is a better conductor than iron, is always
used for the tubes and, as a rule, steel for the casing.