Notes on Steam Boilers: Prepared for the Use of Students at the Massachusetts Institute of Technology

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Norwood Press, 1894 - Steam-boilers - 178 pages
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Page 44 - voyage, while the waste of the voyage was made up by the use of about 70 tons of fresh water, but during the last voyage sea water was used for this purpose. Every four hours,
Page 119 - 18 pounds of coal per square foot of grate surface per hour, and to evaporate 8 pounds of water per pound of coal. It will therefore generate
Page 46 - of an inch thick, which, because of its porosity, is even a better non-conductor of heat than before, and the plate becomes heated to redness and collapses. During the last stages
Page 74 - Slowest rate, Cornish boilers 4 to 6 Ordinary rate, Cornish boilers 10 to 15 Ordinary rate, factory boilers 12 to 18 Ordinary rate, marine boilers 15 to 25 Quickest rate for anthracite coal 15 to 20 Quickest rate for bituminous coal 20 to 25 With forced draught : Locomotives 40 to 100 Torpedo boats 60 to 125 The
Page 46 - of which an oil scum had formed. The ship having to stop some days in Gibraltar, the engineer took the opportunity of blowing out his boiler and refilling with fresh water, with the result that before he had been ten hours under steam the whole of the furnaces had
Page 6 - They are commonly 30 to 42 inches in diameter and from 20 to 40 feet long. They have been made 70 feet long. With such extreme lengths
Page 38 - The result is to give a deposit of calcium carbonate in the form of a fine white powder, which must be washed or swept out, and sodium sulphate in solution, which must be blown out from time to time. If the mineral matters in the water are known from a chemical analysis, the quantity of
Page 46 - and, on again filling up with fresh water, it still remains there, causing rapid collapse. A very remarkable instance of this is to be found in the case of a large vessel in the eastern trade, in the
Page 119 - rate of combustion, and the evaporation per pound of coal. The first item is fixed, and the other two, though somewhat indefinite, may be estimated from the type of boiler and the conditions under which it works. For example, a factory boiler having a grate 5 feet by 6 feet may be assumed to burn 18 pounds of coal per square foot of
Page 161 - Equivalent water evaporated into dry steam, from and at 212 F., per pound of combustible

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