Compound Corliss Engines |
Contents
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Common terms and phrases
Area of Piston area of rod back pressure British Thermal Units cent clearance coal combined diagram combustion compound engine condensing apparatus Corliss valve cylinder areas divided by number Double Expansion economy energy equal example Expansions in H. P. exps Fahr Find Mean Forward foot-pounds Forward press heat in steam heat units high pressure cylinder horse-power Initial press injection water L. P. Cyl L. P. Cylinder latent heat load low press low pressure cylinder Mean Effective Pressure minus Back press multiplied by Hyp multiplied by M. E. P. number of expansions pansions pipe piston speed point of cut-off pound of water pound weight pounds abso pounds gauge pres pumping engine Ratio of Cylinder receiver press revolutions per minute Rule Rule.-"Initial press steam engine steam jacket steam pressure stroke surface condenser Table temperature terminal drop terminal pressure Thermal total expansions total heat Triple Expansion vertical
Popular passages
Page 97 - I call the steam vessel, must, during the whole time the engine is at work, be kept as hot as the steam that enters it ; first by enclosing it in a case of wood, or any other materials that transmit heat slowly; secondly, by surrounding it with steam or other heated bodies...
Page 75 - Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it may be compelled by impressed forces to change that state.
Page 42 - It is impossible for a self-acting machine, unaided by any external agency, to convey heat from one body to another at a higher temperature ; or heat cannot of itself (that is, without compensation) pass from a colder to a warmer body.
Page 97 - Secondly. In those engines that are to be worked wholly or partially by condensation of steam, the steam is to be condensed in vessels distinct from the cylinders, though occasionally communicating with them. These vessels I call condensers, and whilst the engines are working they ought to be kept as cool as the air in the neighbourhood by the application of water or other cold bodies.
Page 50 - The action of the piston as it nears the end of the stroke, in reducing the volume and raising the pressure of the steam retained in the cylinder ahead of the piston by the closing of the exhaust valve. Boyle's or Mariotte^s Law of Expanding Gases. "The pressure of a gas at a constant temperature varies inversely as the space it occupies.
Page 46 - ... said cylinder, and using the elastic forces, wherewith the said steam expands itself in proceeding to occupy larger spaces, as the acting powers on the piston through the other parts or portions of the length of the stroke of the said piston...
Page 81 - I employ the steam after it has acted in the first vessel to operate a second time in the other, by permitting it to expand itself, which I do by connecting the vessels together, and forming proper channels and apertures, whereby the steam shall occasionally go in and out of the said vessels.
Page 46 - My first new improvement in steam or fire engines consists in admitting steam into the cylinders or steam vessels of the engine only during some part or portion of the descent or ascent of the piston of the said cylinder, and using the elastic forces wherewith the said steam expands itself in proceeding to occupy larger spaces as the acting powers on the piston through the other parts or portions of the length of the stroke of the said piston.
Page 41 - Whenever work is performed by the agency of heat, an amount of heat disappears equivalent to the work performed ; and...
Page 75 - Force is that which produces or tends to produce motion or change of motion.