Steam:
Its Generation and Use

Test of four Babcock & Wilcox boilers at the Arlington Mills Mfg. Co.’s, Wilmington, Del., May 9, 1883, by Geo. H. Barrus, M. E. Coal, anthracite pea. Sterling Mine, Shamokin region, Pa. Duration of test, in hours,............... 11 Average steam pressure, .... 106.2 Average temperature of feed, . . . 145.3 Water evaporated in pounds, . . . 161,656 Coal fired in pounds, ........................19,043 Per cent, of ash,......................... ’7-4 Combustible in pounds,.......................i5>72(> Grate-surface, square feet, .... 141.68 Coal burned per sq. ft. of grate, per hour, lbs., 12.22 Water evaporated : Per lb. coal under actual conditions, lbs., 8.49 ■ combustible “ “ “ 10-28 “ coal from and at 212°, “ 9.13 ■ combustible, “ “ 11.44 Rated horse-power, ............................. 488 Horse-power developed, .... 526 Per cent, above rated capacity, ... 7.7 Test of two Babcock & Wilcox boilers, made at the Peacedale Mfg. Co., Peacedale, R. I., Dec., 1882, by Geo. H. Barrus, M. E. Coal, 94 Powelton bituminous, J4 anthracite screenings. Duration of test, in hours, .... 10.25 Average steam pressure, .... 77.5° Average temperature of feed, .... 38 Water evaporated, in pounds, , . . 133,096 Coal fired, in pounds, .......................14,287 Per cent, of ash,............................... 8.8 Combustible, in pounds,.......................13,025 Grate-surface, square feet, .... 70 Coal burned per sq. foot of grate, per hour, lbs., 20 Water evaporated : Per lb. coal under actual conditions, lbs., 9.32 ■ combustible “ “ “ 10.22 “ coal from and at 2120, “ 11-32 “ combustible “ “ 12.42 Rated horse-power,.............................. 284 Horse-power developed,.................... 447-7° Per cent, above rated capacity, ... 57 Test of three Babcock. & Wilcox boilers at the Arlington Mills Mfg. Co.’s, Wilmington, Del., May 10, 1883, by Geo. H. Barrus, M. E. Coal, anthracite pea, Sterling Mine, Shamokin, Pa. Duration of test, in hours, .... 11 Average steam pressure, .... 105.4 Average temperature of feed, .... ’5^-7 Water evaporated, in pounds, . . . i55>707 Coal fired, in pounds,...................*8,371 Per cent, of ash,.............................. 15-8 Combustible, . ’5,47° Grate-surface, square feet, .... 106.26 Coal burned per sq. ft. of grate, per hour, lbs., 15.7a Water evaporated : Per lb. coal under actual conditions, lbs., 8.48 “ combustible “ “ “ 10.07 ■ coal from and at 212«, “ 9.ox ■ ' combustible “ “ 11.08 Rated horse-power............................... 366 Horse-power developed, .... 502-1 Per cent, above rated capacity, . . 37.1 Test of two Babcock & Wilcox boilers, made at Miami Soap and Oil Works, Cincinnati, O., August, 1882, by J, W. Hill, M. E. Coal, Pittsburgh slack, burned with force blast. Duration of test,...................... 8 Average steam pressure, .... 51.72 Average temperature of feed, .... 74.016 Water evaporated, lbs.................. 51,220.79 Coal fired, “ ...............7,365 Per cent, of ash, ...... 12.31 Combustible, lbs.,..........................6,460 Grate-surface,......................... 49-833 Coal burned per sq. foot of grate, per hour, lbs,, ’4-77 Water evaporated : Per lb. coal under actual conditions, . 6.9^4 ■ combustible, “ “ . 7,928 ■ coal from and at 2120, . . 8-136 ■ combustible “ 9.236 Rated horse-power,..................... 146 Horse-power developed,................. 249.69 Per cent, above rated capacity, ... 71 Test made at the Am. Grape Sugar Co., Buf- falo, Jan. 20, 1885, on a Babcock & Wilcox boiler erected July, 1878, by Edwin Roat, Chief Eng. Test of two Babcock & Wilcox boilers, made at the Mill Creek Distillery, Cincinnati, O., by J. W. Hill, M. E., September, 1882. Bituminous coal, Pittsburgh. Duration of test in hours, .... Average steam pressure by gauge, Average temperature of feed water, Pounds of coal burned, .... Pounds of combustible,...................... Per cent, of ash, ..... Coal burned per square ft. grate, per hour, lbs., Total water evaporated at temp, of feed, “ Water evaporated : Per sq. ft. heating surface, per hour, lbs., “ lb, coal—actual conditions, “ “ “ —from and at 2i2°, “ combustible actual conditions, lbs., “ combustible from and at 2120, lbs., Rated horse-power........................... Horse-power developed,...................... Per cent, above rated capacity, IO 68.97 121.42 ’5.065 13,700 9.06 15 ’43.683 4. ix 9-53 10.88 to. 48 11.97 300 529-4 76.4 Coal, Pittsburgh lump, 3d pool. Duration of test in hours,................. Average steam pressure, .... Average temperature of feed................ Water evaporated, in pounds, Coal fired, in pounds,..................... Per cent, of ash,.......................... Combustible, in pounds,.................... Grate-surface, square feet, .... Coal burned per sq. foot of grate, per hour, lbs., Water evaporated : Per lb. coal under actual conditions, lbs., “ combustible, “ “ “ ■ coal from and at 212°, “ ■ combustible “ “ Rated horse-power,......................... Horse-power developed, .... Per cent, above rated capacity, IO 63-975 132 112,663.455 12,000 4.81 ”,421-75 43-5 27.5 9.388 9-863 10.467 10.997 240 418.7 74-4