f the boilers is
automatic and requires practically no work on the part of the
engineers, no firemen will be needed. Ashes will also be automatically
removed. The engine room equipment will consist of two 100-ton high
speed compressors, direct connected to two Simple Condensing Unaflow
Engines; also two generators, two cooling tower pumps, two air
compressors, switchboard, etc. All to be equipped with the latest
labor and power-saving devices.

Equipped as above, 25 tons of refrigeration can be easily obtained
from one ton of ordinary 12500 B T U coal. 1.8 tons of refrigeration
is required to produce one ton of ice, including the cooling of the
storage house.

Therefore, the power cost of making one ton of ice with coal at $5.00
per ton equals $5.00 divided by 25/1.8 = 37 cent. (One cent per ton of
ice is added for heating of dipping-tank water.)

Assuming one month's shut down for inspection and repairs, the total
output of 100 tons of ice for 333 days amounts to 33,300 tons of ice.

The total power cost of making 33,300 tons of ice is therefore,
33,300 x 37 cent, equals $ 12,321.00

[13]

ENGINE ROOM AND ICE PLANT LABOR COST:

1 Chief Engineer per day $ 8.00

3 Engineers per day $ 6.00

2 Storage House Men per day $ 4.00

Total per day $ 34.00

Total 365 days at $34.00 per day $ 12,410.00

Additional labor cost for putting
7,500 tons into winter storage
and taking out at $4.00 per day $ 750.00

Total labor cost $ 13,160.00

or 13160 / 33300 = 39.52 cent per ton

Engineer will do his own firing of boilers and will pull all the ice
and set it up in ante room if required. One pull required every 70
minutes.

Chief Engineer will act as shipping clerk.

OFFICE EXPENSE:

1 Office Man (Manager and Bookkeeper) $ 3,000.00

Stationery, Telephone, etc. (per year) $ 300.00

Total Office Expense $ 3,300.00

or 3300 / 33300 = 9.9 cent per ton

Cost of Ammonia at 2 cent per ton $ 666.00

Cost of Oil and Waste at 2 cent per ton $ 666.00

Cost of Water at 3 cent per ton $ 999.00

Cost of Salt at 1/2 cent per ton $ 166.50

Plant Maintenance and Repairs $ 1,500.00

or 1500 / 33300 = 4.5 cent per ton

[14]

OVERHEAD CHARGES:

8 per cent interest on
$150,