A Manual of Steam-boilers : Their Design, Construction, and Operation: For Technical Schools and EngineersWiley, 1890 - 671 pàgines |
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Altres edicions - Mostra-ho tot
A Manual of Steam-boilers : Their Design, Construction, and Operation: For ... Robert Henry Thurston Visualització completa - 1890 |
Frases i termes més freqüents
amount anthracite atmosphere bituminous coal boiling-point British British thermal units burned calorimeter carbonic acid cause cent chemical chimney coke condensation construction cubic cubic foot cylindrical determined diameter draught ductility effect efficiency elastic limit energy engineer equal equivalent evaporation experiments explosion external factor of safety Fahr feed-water feet fire firebox flue fluid fuel furnace gases given grate heat of combustion heat-energy heating-surface horse-power hydrogen increase iron kilogrammes latent heat less liquid locomotive mass matter maximum measured metal method nearly obtained oxidation oxygen plates pounds per square pressure produced products of combustion proportion quantity of heat ratio resistance rivets safety-valve seams sensible heat sheet shell sometimes specific heat square inch steam steam-boiler steam-engine steam-pressure steel strength stress surface taken temperature tenacity thermal units thermodynamics thickness tion total heat tubes ture usually valve variation volume weight
Passatges populars
Pàgina 214 - calorie," as it was called by the French philosophers who first adopted the metric system, is that quantity of heat which is required to raise the temperature of one kilogramme of water one degree centigrade, — the
Pàgina 500 - On account of the difficulty of securing accuracy in these tests the greatest care should be taken in the measurements of weights and temperatures. The thermometers should be accurate to within a tenth of a degree, and the scales on which the water is weighed to within one hundredth of a pound. ANALYSES OF GASES. — MEASUREMENT OF AIR-SUPPLY, ETC. XV. In tests for purposes of scientific research, in which the determination of all the variables entering into the test is desired, certain observations...
Pàgina 544 - The energy of gunpowder is somewhat variable, but it has been seen that a cubic foot of heated water, under a pressure of 60 or 70 pounds per square inch, has about the same energy as one pound of gunpowder. The gunpowder exploded has energy sufficient to raise its own weight to a height of nearly 50 miles ; while the water has enough to raise that weight about one-sixtieth that height.
Pàgina 496 - II. Measure and record the dimensions, position, etc., of grate and heating surfaces, flues and chimneys, proportion of air-space in the grate-surface, kind of draught, natural or forced. III. Put the Boiler in good condition.
Pàgina 231 - Heat is a very brisk agitation of the insensible parts of the object, which produces in us that sensation from whence we denominate the object hot ; so what in our sensation is heat, in the object is nothing but motion.
Pàgina 241 - That the quantity of heat produced by the friction of bodies, whether solid or liquid, is always proportional to the quantity of force expended.
Pàgina 496 - Establish the correctness of all apparatus used in the test for weighing and measuring. These are: 1. Scales for weighing coal, ashes, and water. 2. Tanks, or water-meters for measuring water.
Pàgina 68 - With such brittle materials as the cast-irons, the difference becomes unimportant. Beardslee found a difference of but i per cent in certain cases. The more brittle the material the less this variation of the observed tenacity. As will be seen later, even more important variations follow changes of proportion of pieces in compression. No test-piece should be of very small diameter, as inaccuracy is more probable with a small than with a large piece, and the errors are more likely to be increased...
Pàgina 233 - In our demonstrations we tacitly assume that after a body has experienced a certain number of transformations, if it be brought identically to its primitive physical state as to density, temperature, and molecular constitution, it must contain the same quantity of heat as that which it initially possessed...
Pàgina 503 - Factor of evaporation = — -r- — , //and h being respectively the total heatunits in steam of the average observed pressure and in water of the average observed temperature of feed, as obtained from tables of the properties of steam and water. 'Item 29 = Item 27 X (H — k).