NOTES ON PUMPING MACHINERY.
At the new pumping station on the North Side of Chicago the recently installed pumping machinery has just been subjected to a twenty-four hour test, which revealed that the engines were far greater in efficiency than the contract between city and builders had stipulated. Designed by Engineer Henry A. Allen, the pumps did more work than their builders ever expected, and a large section of the city will enjoy, as the ultimate result, a more bountiful supply of water than appeared possible to give it. The guarantee of these engines was 162,000,000 foot-pounds at 1,000 pounds of superheated steam, while the “duty” attained during the test was more than 186,000,000 pounds, showing that they are better than any others now operated by the city.
During 1906 the work done at Richmond, Va., by the waterwheel and engine respectively was as follows: Pumped b.y turbine, 109,910,000 gals.; pumped by engine (when the water is out of the firelay, or when the turbine has been stopped), 4,670,000 gals.—total 114,580,000. Supt. Bolling keeps urging the installation of additional pumping machinery. He says; “The time has come when it is absolutely necessary and we should add to our pumps. It cannot be postponed any longer. By the first of July next we hope and expect to have everything completed to furnish water from the settling basins. It will all have to be pumped at the new pumpinghouse. Our present water pumps at this station are not capable of furnishing the daily consumption, and will have to be augmented by the steam pump. It costs three times as much to pump by steampower. Should it be decided that the city will not erect an electric light and power plant at the old pumphouse, to be used both for lighting and pumping purposes, it is imperative that we should at once build a waterpower pumping plant at the new pumphouse, and, at an early date, augment this plant by a steam plant of not less than 10,000,000 gals, capacity, to be held in reserve in the event of accident to our waterpower, brought to us by a canal for a distance of nearly seven miles. The banks of this canal ate liable to breakage from very high freshets. The addition of a 12,000,000 plant at the new pumphouse would aggregate 23,500,000 gals, waterpow’er pumps and 5,500,000 gals, steam pumps—our present steam capacity. * * * A recent estimate made and submitted to the committee on water for a 20.000,000-gal. waterpower plant was $178,891.06.”
The report of the convention of New York State Fire Chiefs will be concluded in the next issue of FIRE AND WATER ENGINEERING.