Bulletin of the United States Geological SurveyThe Survey., 1908 - Geology |
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11 Indian Territory 12 Illinois 18 one-half 19 and Miscellaneous 2.-Tests of fuel 26 Pennsylvania 38 Indiana 39 Illinois 45 Arkansas 48 Illinois 52 Illinois air supply ash pit average binder bituminous coal boiler at St boiler horsepower boilers at Urbana-Continued briquet tests British thermal unit BULLETIN clinker in refuse CO₂ coal was fired Coke Designation of fuel different fuels dry fuel efficiency evaporating 1,000 pounds feet of radiating fire door flue gas fuel as fired fuel in house-heating fuel-testing plant gases Geological Survey grate surface heating boilers house-heating boiler plant Illinois coal inch thick Item load regulators Louis-Continued Louisiana Purchase Exposition Missouri Moisture Number of tests one-fourth percentage of clinker pipe plant at St Pocahontas coal pounds of water radiating surface rated capacity developed Rhode Island sectional boiler shows soot STANDARD FUELS steam pressure TABLE 4.-Tests tests at Urbana TESTS ON BRIQUETS TESTS ON STANDARD Virginia volatile matter
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Page 44 - BULLETIN 339. The purchase of coal under government and commercial specifications on the basis of its heating value, with analyses of coal delivered under government contracts, by DT Randall. 1908.
Page 44 - BULLETIN 332. Report of the United States fuel-testing plant at St. Louis, Mo., January 1, 1906, to June 30, 1907; JA Holmes, in charge. 1908. 299 pp. BULLETIN 334. The burning of coal without smoke in boiler plants; a preliminary report, by DT Randall.
Page 43 - The following publications, except those to which a price is affixed, can be obtained free by applying to the Director...
Page 41 - ... basis, was 44.85 per cent for the 24 tests. A comparison of eight tests on briquets, of which four were made on large briquets and four on small briquets, shows that the large briquets invariably gave an appreciably higher efficiency, indicating that the size of the coal burned is an important factor. With the cost of fuel assumed at $1 per 2,000 pounds, the cost of evaporating 1,000 pounds of water from and at 212° F.
Page 6 - B were completely stopped up at the end of the eight-hour run. CONCLUSIONS. On comparing the results of tests on the coal and briquets there seems to be no advantage in the briquets over coal of a suitable size for house-heating boilers. Briquetting a good bituminous coal would be justified only when slack is used for material and the gain from briquetting would lie almost entirely in the more favorable size of the fuel. This gain would be less for coals that coke readily than for noncoking coals...
Page 43 - Preliminary report on the operations of the coal-testing plant of the United States Geological Survey at the Louisiana Purchase Exposition, in St. Louis, Mo.. 1904; E.
Page 42 - ... of results on coal and on briquets shows no advantage in the briquets over coal of a size larger than screened nut. Briquetting good bituminous coal would be justified only when slack is used for material. The briquets tested gave much smoke, which was due to the pitch used as a binder. The results indicate that coals containing the higher percentages of fixed carbon give the least smoke and are the most economical. While these tests were going on a general inquiry was being made into the question...
Page 22 - Fuel per hour per 100 square feet of radiating surface (mean load carried during test...
Page 32 - ... density. In all the briquet tests the stack smoked badly for three-quarters of an hour after firing. About one hour after firing the stack became almost clean, remaining so until another charge was fired. DEDUCTIONS FROM TEST DATA. Table 6 is a compilation of nine different items from the St. Louis tests (exclusive of tests on mixed coals and one on Arkansas No. 13) averaged on the percentage of volatile matter in the combustible as a base. These results emphasize the difficulty of burning high-volatile...
Page 16 - The ash and refuse from the coal were completely removed before the grates were dumped to clean them of the residual fuel. Just as the grates were dumped the final readings of time, water level, and pressures were taken. The boiler flues were blown after the close, of every test, so that the heat developed had an equal chance on the heating surface at the start of each test; however, on some of the trials more soot was formed than on others and the heating surface on these trials was therefore much...