The Transmission of Power by Compressed AirD. Van Nostrand Company, 1878 - 133 páginas |
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absolute temperature adiabatic applied Area body Boyle's law Brevet British Thermal Unit Bushnell Clausius cloth complete expansion compressed air compressed-air engine constant pressure constant volume cooling cylinder dead spaces density diameter edition effect efficiency ences equation feet final temperature formula full pressure GAY-LUSSAC'S LAW GILLMORE Gothard Tunnel Harlem River heat at constant heat of compression hence hot water hydraulic Illustrated inch increases internal heat intrinsic energy kilogram kilogramme loss of pressure machinery machines Mallard Messrs moisture morocco NOSTRAND'S PUBLICATIONS obtained P₁ partial derivative perature performed pipes piston plunger pounds pression pump quantity of heat Quantity of Water ratio reservoir saturated single-acting sion specific heat steam supplied surrounding atmosphere tempera theoretically thermal unit thermodynamics tion transmission ture valves vapor water-vapor weight of air weight of water Wet Compressors Whitneyville wood-cuts working-cylinder
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Página 31 - ... of the head; the absolute initial pressure was 5.70 atmospheres, and it was reduced to 5.50 atmospheres whilst there was an expenditure at the rate of 64 cubic feet of compressed air per minute. In the middle of the tunnel, through a length of pipe of 3.8 miles, the absolute pressure fell only from six atmospheres to 5.7 atmospheres, or to .95 of the original pressure. At the Hoosac Tunnel the air was carried through an 8-inch pipe from the compressors to the heading, a distance of 7,150 feet,...
Página 41 - It has been found best to take a thermal unit to be the quantity of heat which correspends to some definite interval of temperature in a definite weight of a particular substance. ' Def. A British Thermal Unit is the quantity of heat which corresponds to an interval of one degree of Fahrenheit's scale, in the temperature of one pound of pure liquid water at its temperature of greatest density (39°.
Página 44 - All forms of energy are convertible. 2. The total energy of any substance or system cannot be altered by the mutual actions of its parts.