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600 Single eyl. 1,500 RPI.
Chain grate and under-equipment, Exhaust steam heating!
from turbo set sup plying auxil tuated a mill. The dry coal is fed into this mill by machinery; then huge pounders—somewhat similar to a chemist's. pestle—pulverize the coal until it is as fine as flour. The powder is then blown to the roof again and from there descends to the boiler burners mixed With air, and is then blown into the furnaces, creating an intense heat.
This has been found to be a most <conomical way of firing boilers and, indeed, in this new station, all sorts of installations have been brought suto use with an idea of cutting costs a minimum. For instance, the that. gases created by the furnaces are used. Instead of being let loose nto the air as heretofore, they are taken from the top of the furnace and used to heat water and air so Ghat less energy will be required to bring the water to the temperature required, The air thus heated is applied to the-furnaces by means of Hered draught fans. "These and Interior of control room looking south. sequent to the usual initial minor adjustments, the economy anticipat-fed as a result of the departures design referred to has been realized, this being mainly due to the higher efficiency obtained by operating at the higher steam pressure and temperature; the higher efficiency jof the matti-cylinder high speed turbo alternators; the utilization of relatively cheap coal in powdered form at efficiencies which could not be approached with automatic stoker equipment; and, lastly, efficient. operation.
This base load plant has not been in operation for a sufficient length of time to make direct or equitable comparisons with other base load stations operating in Great Britain, but a fair conception of the possibilities can be obtained from the records of performance subsequent to the plant going into full service and under spgeified operating conditions, The Fecords covering four weeks ending December 25 show that during this period over 26,000,- 090 K. W. hours have been generat-floor of new boiler house, Riverside ed in the new station, representing. 49 per cent. of the combined output, and the consumption has been only 14,498 BIT.U's, per K.W. hour generated, ie, overall thermal efficiency 23.55 per cent.
The report of the Electricity Com missioners for twelve months ending March 1929 covering fuel consumption returns of authorized under-
[takings in Great Britain shows that, the highest power plant efficiency is. to the credit of the Lancashire Blectrie Power Company, their: Padiham Station having headed the list with an overall thermal efficiency of 21.35 per cent., ie 16,000 U's. per K. W. hour; the Barton Station of the Manchester Coxporation taking second place with 21.31 per cent. or 16,020 B, 'T. U's, per W. hour. Both axe base' load stations and the latter can be com pared with Riverskle "B" Station the operating esnditions are almost identical The coal consumption for Padiham is 1.33 1b. par K. W. hour, thus the average calorific value of the fuel used is 12,090 B: T-U_'s. per Ib. a9 received. Similarly, the Barton coal figure is 1.87 Ib. per K. W. hour and the average calorific value of the fuel as received is therefore 11,700 B.T.U's. per Ib.
It is noteworthy that the fuel used in Riverside "B" Station is of much lower grade than either of these, the calorific value being con siderably below 11,000 B.T.U's. per 1b,, and is evidence of the fact that mich better results can be obtained with low and medium grade fuels in pulverized frm than can be obtained with any other type of firing station, equipment for burning coal in ite raw state. Furthermore, the a doption of the pulverized fuel system has opened up a much wider field im the choice of fuels, Needless to say the economy effected by the operation of the new plant will react immediately to the advantage of the consumers taking. bulk supply, and as further progress is made in this direction it will no doubt benefit consumers as a whole, Ar the request of the Chinese Shipowners Association, the Chino-tungpu has instructed the Customs authorities to forbid the Sungshan Maru, a Japanese vessel, to run between Shanghai and places along the Chekiang coast, as the ports called at are not treaty ports, AN international acrodrome will jhe constructed on reclaimed ground Yedomisaki, Haneda-machi, a suburb of Tokyo, by the Avi Bureau in the Ministry of Communications, according to Japanese newspapers. Tt is said that the new field, which will have facility \for both' water and land planes will be the biggest of its kind ever constructed in the Far East. A
THE Chinese Shipowners Asso ciation has telegraphed to the Waichiaopu, vigorously protesting against the Japanese encroaching' upon China's fishing rights, and requesting that this matter be taken Up, strongly with the Japanese Govarnment. The Waichiaopu has ord ed the governments of the various coastal provinces to aubstit reports to the Ministry in this respect,
Text read from the printed page and cleaned; old type leaves the occasional error.