Condensers. A series of lectures and articles upon the subject by Low F. R. (Frederick Rollins) 1860-1936

Author:Low, F. R. (Frederick Rollins), 1860-1936
Language: eng
Format: epub, pdf
Tags: Condensers (Steam), Steam-engines
Publisher: New York, The Power publishing company

ing apparatus, close the engine throttle first, and when the engine has stopped, and not until then, close the injection valve C, and lastly shut down the air pump. By shutting off the water supply before the air pump is stopped, the water already in the condenser and pipes is pumped entirely out and there is no danger of it getting into the engine cylinder.

THE SURFACE CONDENSER.

Suppose that we have a cylindrical vessel arranged as in Fig. 6, with a pipe through the center, leaving an annular space outside of the pipe. If we fill the annular space with steam and run a stream of cold water through the pipe, the steam will condense upon the cold pipe surface and fall to the bottom of the vessel, leaving a vacuum above it. If we draw off this condensed steam

and the air it brought in with it, we can refill the vessel with steam and, by running more cold water through the pipe, condense this new steam; this operation can be continued indefinitely and a constant vacuum maintained in the vessel. In this case, we see that the exhauster draws out only the condensed steam and entrained air, the cooling water being kept entirely separate.

In the jet condensing arrangement shown in Figs, i and 2, it is plain that the condensing water flows into the vessel on account of the vacuum therein; while in this case the part of the vessel which is under a vacuum is, as we said above, entirely separate from the condensing water, making it necessary to force the water through the pipe by some other means

This is exactly the manner in which the surface condenser operates.

Fig. 7 shows a sectional view of a complete surface condenser and pumps.

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