Heat Engines, Embracing the Theory, Construction, and Performance of Steam Boilers, Reciprocating Steam Engines, Steam Turbines and Internal Combustion Engines: A Text-book for Engineering Students

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Longmans, Green and Company, 1920 - 592 σελίδες
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Σελίδα 18 - ... the earth. A compressed spiral spring has potential energy, because if it is allowed to resume its unstrained form it can be made to do work. Likewise compressed air possesses potential energy. The energy stored in a piece of coal is potential energy, and under favourable conditions the atoms of the constituents of the coal and the atoms of the oxygen of the air will rush together and produce heat which may be converted into work. Kinetic Energy is energy due to the motion of a body. A gallon...
Σελίδα 288 - The spring K, while sufficiently rigid to transmit the motion of the main spring to the end of the arm M without buckling, is flexible enough to allow for the angular motion of that arm. The mirror is thus turned about the axis of the spindle by an amount which is proportional to the displacement of the main spring D, and therefore to the pressure under the piston. In order to give the other motion to the mirror the frame B is positively connected by linkage...
Σελίδα 20 - It is impossible for a selfacting machine, unaided by any external agency to convey heat from one body to another at a higher temperature, or heat cannot of itself pass from a colder to a warmer body.
Σελίδα 17 - In measuring work the unit which is generally used by engineers is the work done when a force of one pound acts through a distance of one foot, this unit being called a foot-pound.
Σελίδα 17 - For measuring small quantities of work the inch-pound, or the work done when a force of one pound acts through a distance of one inch, is frequently used.
Σελίδα 287 - At the top it is provided with a hook, G, the opening of which is slightly larger than the thickness of the spring. The piston is thus free to move laterally, and no binding action is possible between it and the sides of the bore, such as would occur if the piston were rigidly attached to the spring. The mirror, H, is clamped to a steel spindle, I, the ends of which are pivoted in small holes in the vertical spring cheeks, JJ.
Σελίδα 460 - The pressure of the mixture of a gas and a vapour is equal to the sum of the pressures •which each would possess if it occupied the same space alone.
Σελίδα 183 - D, on the cover in a thin sheet, and is instantly heated by contact with the steam. As the pressure in the heater is generally much less than that of the entering water, the effect of this lowering of the pressure, and sudden heating of the water, is to liberate the air in the water...
Σελίδα 19 - Ib. and foot units. 49. Total Kinetic Energy of a Body.— If a body of weight W rotates about an axis through its centre of gravity with an angular velocity...
Σελίδα 384 - ... of the same weight of water at the temperature of the engine exhaust, both quantities being reckoned from 32° F.

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