This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...installations in Northern Italy, and which convey water for several kilometres, have been so costly as to be quite prohibitive in coal mining countries where cheap steam coal may be obtained. In fact the writer ascertained that the interest on the first cost of one famous installation added to the cost of maintenance ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...installations in Northern Italy, and which convey water for several kilometres, have been so costly as to be quite prohibitive in coal mining countries where cheap steam coal may be obtained. In fact the writer ascertained that the interest on the first cost of one famous installation added to the cost of maintenance made the cost of power almost equal to that derived from high priced fuel in a large city to which the power was conveyed by transmission lines. True, the losses in transmission, amounting to 8 per cent., told against the water-power plant, but notwithstanding this, the difference in cost of a horse-power delivered from the two sources was barely sufficient to justify the enormous expense of a canal cut through rock for several kilometres. And so it is in many other instances where, at a great outlay of capital, water power is delivered in competition with heat-engine power with very little difference in cost, owing to the heavy capital cost of the works necessary to develop it, though the running costs and maintenance charges may be extremely low compared with steam or gas power. The development of such water powers remote from the centre of distribution is a problem of a special kind, while the use of small powers located close to a manufacturing centre and in direct competition with cheap steam power is quite another. Without prejudging the question as to the distance it is commercially practicable to transmit power (the maximum distance at present being 232 miles from the De Sabla power-house of the California Gas and Electric Co. to Sausalito at 50,000 volts), the limitations to which are chiefly in the cost of the copper line, and the difficulties incident to the insulation of the line at very high potentials, it is clear that there is a ...
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