The Hawaiian gazette. [volume] (Honolulu [Oahu, Hawaii]) 1865-1918, 1915-10-29

p.
Another thing" he said, 'tany en-
gineer who is about to install motors
ought TO figure his full requirements
and then add City per cent, because
current Is SO handy there are going TO
be n lot Of unforeseen calls for II. -
The engineers then talked over the
best form of motor, whether squirrel
cage" OF "form. wound =, and the rela
ton of "starting tor" TO their use.
Whether TO use turbines or cehtrifu-
gals for Juice pumps ELECTED some diff
ference OF opinion and was debated by
Messrs, Murray, Winter, Gushingham
and Carr. r. 8, Norris said that In
California beet factories centrifugals
are used on all thin juices. From the
syrup on, .roeiprocating pumps are used.
Visiting Expert Gives Opinion ,
The question Of control of centrifu-
gal pumps by varying the speed, or
thrattling down, was another problem
attacked from many angles. Il. w.
Green, visiting representative of tho
AIberger Pump and Condenser Com.
pany, explained why throttling at the
discharge end is better practise. As
long as a pump does not run entirely
dry no serious trouble arises and
variations In speed are not necessary
Mr.. Carr said varying the speed of the
motor TO meet the variations m the sup
Iply of mill juice, takes more power, and
Mr.. Green said Mr.. Carr was right
except in the case of heavy installa
tions, say 1O00-horsepower city pump
ing plant. :.
Electricity Or steam7 u
Renton Hind then called for dis.
cussiOn of the main problem, that Of
electrifying the mill The point. here
seems to be whether motors will do
what steam does. The tendency in all
sugar mills appears to be towards the
maintenance of constant speed. VIII
electric drive do the worki he asked.
That brought up the matter Of chok
ing the mill, at the crusher end and
the resulting difficulty of holding CON
slant blanket as the cane passes
through the three or four mills. 81.
Mr.. Carr said there should be indi
vidual motors, one to each mill Rem
ton Hind thought the general adop-
| ton of juice growing in mill rollers has
changed both the system and the re-
quirements. Formerly mills were run
at varying speed but nowadays .engi-
ueers are decreasing the speed and max
ing il uniform. If mill chokes that is
overcome by speeding up, not by stop.
ping the train. Mr.. Carr raised the
point that slow drive Is not economical
of power, but that off a single motor
Is best it can be done that way"
Dollar Is Limiting Factor
Mr.. Hind said it really narrows
down to a question of cost. The single
motor would cost less to install and
would probably prove the more econ.
omieal. Horace johnson said that If
olect IRRIGATION of the mill is possible
and works towards economy it will be
u fine thing.
% Individual motors were favored by
Messrs. J, Wyllie, Greaves and Kruse
rhe single motor advocates were Simp-
son, Glib and Bechert. j. s. X. Cush.
ingham thought there ought to be two
motors, one on the fourth mill and one
for the first, second and third mills
working as single unit. His point
was that the quality Of cane varies
with different varieties and the speed
IF the fourth mill must be under con
troll to maintain the continuity of the
blanket.
Watchful Waiting
w. G. Hall said the sugar mill prac.
tise il constantly ruupi1U in circles
Nav ideas anneaT. are tried ont and re.
tanned or rejected. IF there il M AZ
tual gain from new Inventions or new
methods the circle returns tn it's start.
inc point
The Cuban planters are ''eIectricitv
mad, and are going the limit "Five
wears hence we will know more about
i - he said. Wbut Ave wears from now
we will probably look hack and want
to know where we started from" He
asked that a vote he taken on the ones.
ton of whether the engineers look with
favor on motor drive-sunposinp the
cash is availableA2.or whether the Ha.
waiian industry ought 10 stick to steam.
The vote stood tweIve IN one in favor
of the motor drive.
Messrs. ,Plankinuton md Carr then
talked "peak loads,I and .'yaIlevsV
and the relative ADVANTAGES Of direct
and alternating e1rrent i9 overcoming
them. J C, PIsnkington said there arc
no "peaks or yalIeysD in sugar mills
Flvwbeels are not therefore needed on
min drives, AZ II costs mower To drive