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Gross | 3000 | 6000 | 9000 | 12,000 | 15,000 |
Indicated | Ind. | Ind. | Ind. | Ind. | Ind. |
Horse Power | H.P. | H.P. | H.P. | H.P. | H.P. |
at Central | | | | | |
Works: | | | | | |
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Thousands of | 1,080,000 | 2,160,000 |3,240,000 | 4,320,000 |5,400,000 |
Cubic Feet at 45 | | | | | |
lbs. pressure | | | | | |
at engines | | | | | |
Deduction for | 17,928 | 70,927 | 154,429 | 267,529 | 409,346 |
friction and | | | | | |
leakage | | | | | |
Estimated net | 1,062,072 | 2,089,073 |3,085,571 | 4,052,471 |4,990,654 |
delivery | | | | | |
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CAPITAL | | | | | |
EXPENDITURE-- | | | | | |
Purchase and pre-| £12,500 | (amounts below apply to extension of works) |
paration of land | | | | | |
Machinery | 27,854 | £25,595 | £25,595 | £25,595 | £25,595 |
Mains | 10,328 | 10.328 | 10,328 | 10,328 | 10,328 |
Buildings | 8,505 | 4,516 | 4,632 | 4,614 | 4,594 |
Parlimentary and | | | | | |
general expenses,| 20,000 | .. | .. | .. | .. |
royalty, &c. | | | | | |
Engineering | 3,268 | 1,820 | 1,825 | 1,824 | 8,823 |
Previous Capit-| | 82,455 | 124,714 | 167,094 | 209,455 |
al Expenditure | .. | | | | |
Total Cap. Exp. | £82,455 | £124,714 | £167,094 | £209,455 | £251,795 |
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ANNUAL CHARGES-- | | | | | |
Salaries, wages, | | | | | |
& general working| £6,405 | £7,855 | £9,305 | £10,955 | £12,480 |
expenses | | | | | |
Repairs, renewals| 2,780 | 5,198 | 7,622 | 10,045 | 12,467 |
&c.(reserve fund)| | | | | |
Coal, water, &c. | 1,950 | 3,900 | 5,850 | 7,800 | 9,750 |
Rates | 370 | 674 | 980 | 1,285 | 1,585 |
Contingencies of | | | | | |
horse power = 5 | 575 | 881 | 1,187 | 1,504 | 1,814 |
per cent on above| | | | | |
Total Ann. Exp. | £12,080 | £18,508 | £24,944 | £31,589 | £38,096 |
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Revenue at 5d. | | | | | |
per 1000 cub. ft.| 22,126 | 43,522 | 64,282 | 84,426 | 103,971 |
(average) | | | | | |
Profit |12.18 p.ct.|20.06 p.ct.|23.54 p.ct.|25.22 p.ct.|26.16 p.ct.|
|= 10,046 | = 25,014 | = 39,338 | = 52,837 | = 65,875 |
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TABLE II.--Cost of Air Power in Terms of Indicated Horse Power.
Abbreviated column headings:
Qty. Air: Quantity of Air at 45 lbs. Pressure required per Ind. H.P. per Hour.
Cost/Hr.: Cost per Hour at 5d. per 1000 Cubic Feet.
Cost/Hr. w/rebate: Cost per Hour with Rebate when Profits reach 26 per Cent.
Cost/Yr.: Cost per Annum (2700 Hours) at 5d. per 1000 Cubic Feet.
Cost/Yr. w/rebate: Cost per Annum with Rebate when Profits reach 26 per Cent.
Abbreviated row headings:
CASE 1.--Where air at 45 lbs. pressure is re-heated to 320° Fahr., and expanded to atmospheric pressure.