Hopkinsville Kentuckian. [volume] (Hopkinsville, Ky.) 1889-1918, 1897-02-16

NuNttOuS bDoCtdl DDlltAliOud OF
refrigeration have arisen which
would scarcely have been suspected
until small refrigerating plants were
perfected There are May prod
ucts, such as oil and chemicals,
which arc drawn very hot from the
stills aud retorts, and on which the
saving Of time by quick cooling
more than pays for the cost of re-
frigeration.
Among these lines of service per-
haps one of the most interes ting is
that Of chocolate making. Choco-
late was formerly manufactured
only in cold weather when the tenn
pcrature was low enough for it to
be worked and hardened.
A Yorking-room temperature Of
65 degrees is sufficient for the dip
ping process and insures the setting
OF the chocolate when put in the
chill-room at As degrees. If the
temperature be much above So de-
grees the chocolate remains sticky
and plastic, which is very incon-
venient under any circums tances,
and absolutely fatal to bonbons.
Cooling coils are placed around
the room like steam-pipes, but in
addition to this, and Of even greater
Importance, air. bunkers are provid-
ed, containing ammonia coils, over
which the air is forced and cooled.
1t is then delivered to the room
through large galvanized pipes, run
Mug across the ceiling, thus pro-
viding ventilation for the operatives
and the requisite GOODNESS to work
the chocolate. The chill-room is re-
frigerated to As degrees in the usual
way and opens off the dipping room.
Another one of the many odd
uses of refrigeration is in connec-
ton with gelatine working. Every
one is familiar with the gelatine
capsules in which medicine is ad-
ministered, and will readily under
stand that difficulty might be ex-
perienced in manufacturing such
articles in hot and moist weather.
The capsules are formed of sheets Of
gelatlne pressed over steel pins.
The cooling must take place rapidly
in order to turn out the product in
sufficient quantity, while to insure
quality and general evenness of ma
terial proper temperature must be
provided.
In one of these instances it was
found that about 10000 cubic feet
of air had to be cooled per hour in
order to insure an even tempera-
ture for the gelatine, and about 160,-
600 pounds Of steel pins per work
ing day had to be cooled from about
80 to 70 degrees. BY combining
the two requirements and making
the blast of cold air cool the pins,
both of these results were effected
through one operation, requiring
only the cooling of sufficient air in
bunkers with refrigerating coils
Perfect success was met, and prob
ably in no other way could so use
full result have been obtained so
cheaply.
In the tempering of steel or the
cooling of other articles in a bath of
special composition of such cost that
it cannot well be run to waste-as
oil or brine-the necessity arises of
removing the heat surrendered by
the material cooled, thus keeping a
constant temperature in the dipping
tank. In the case Of saw temper
ing, large volume of brine is re-
frigerated and circulated through |
the dipping vat. The large reserve
volume acts as q fly wheel, equal
izing fluctuations of temperature
arising from varying rates of dip
ping, the compressor running con-
tinuously. w. c, Kerr, in Casters
Ma0o1ino