Improvements in electrical engineering constituted another large subject, Mr. Aldridge pointed out, of interest to those watching the progress of electricity. In this connection, a great deal of credit was due to the manufacturers of plants, in design and manufacture, the new types showing.
great improvement over those of several years ago. A vast amount of research preceded improvement design and manufacture, and Mr. Aldridge stressed the tendency which was being shown at the preent time of big electrical engineer. regarded some of the economies possible through the new designs. That section of the power station which was designed in 1910. and which operates at a steam pressure of 200 Ibs per square inch and at a final steam temperature of 572 degrees F, requires approximately 428,000 tons of coal a year, at a cost of approximately Tls. 3,800,000, At the present time four large boilers and two 20,000 kilowatt turbines are being installed,—the boilers designed to operate at 375 Ibs. pressure and the steam temperature at 700 degrees F. If the whole output of the present station operating at 200 Ibs. (pressure) were operating under similar conditions to the new extension, the amount of coal consumed would be 827,000 tons a year, costing Tls. 2,916,000 approximately, or annual saving of Tls. 884,000 over the present arrangements.
The whole attitude of go-ahead public utility concerns nowadays, Mr. Aldridge said, was to adopt the more modern designs which were being worked out by electrical and mechanical engineers as the improved economy was what was. Constantly before them, Bringing the matter down to local issues, Mr.
Aldridge said that it was practically certain that within a reasonable distance of time, Shanghai would benefit by lowered electrical production costs, made possible by the adoption of higher pressure and temperature in Riverside Station. Although the initial capital costs were higher for the higher pressure designs, it was the general opinion that. the operation economy would much more than off-set tt
Text read from the printed page and cleaned; old type leaves the occasional error.