On the Development and Transmission of Power: From Central StationsLongmans, Green, 1894 - 312 páginas |
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Página 29
... the con- densation of fresh steam . Nearly all the heat of the steam so condensed is wasted , during the next period of exhaust , by re- evaporation during the return stroke , when no useful work ENGINE EFFICIENCY 29.
... the con- densation of fresh steam . Nearly all the heat of the steam so condensed is wasted , during the next period of exhaust , by re- evaporation during the return stroke , when no useful work ENGINE EFFICIENCY 29.
Página 30
... stroke . As in steam engines , the evil is greater the greater the wall surface exposed at the moment of explosion . This appears to be the principal reason why initial compression of the gases is necessary for good efficiency . The ...
... stroke . As in steam engines , the evil is greater the greater the wall surface exposed at the moment of explosion . This appears to be the principal reason why initial compression of the gases is necessary for good efficiency . The ...
Página 32
... stroke and lessens the amount of heat which must be given by the steam to the wall during admission . Table II.C above shows how advantageous in most cases the use of a steam - jacket is . But though a steam - jacket reduces , it does ...
... stroke and lessens the amount of heat which must be given by the steam to the wall during admission . Table II.C above shows how advantageous in most cases the use of a steam - jacket is . But though a steam - jacket reduces , it does ...
Página 43
... stroke , the speed being constant , then the conditions are different . If the power is varied by varying the speed , then the work against back pressure bears the same ratio to the effective work at all loads . Influence of the Type of ...
... stroke , the speed being constant , then the conditions are different . If the power is varied by varying the speed , then the work against back pressure bears the same ratio to the effective work at all loads . Influence of the Type of ...
Página 45
... stroke by altering the density of the steam . This may be done by varying the boiler pressure or by throttling the steam . Lastly , the expansion may be varied . A case of an engine has been taken and the effect on the steam consumption ...
... stroke by altering the density of the steam . This may be done by varying the boiler pressure or by throttling the steam . Lastly , the expansion may be varied . A case of an engine has been taken and the effect on the steam consumption ...
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adiabatic air mains air motor alternate current atmospheric boilers cable cent central station coal compressed air compressors condensing conductors constructed cost Crown 8vo cubic feet curves cylinder destructor Diagrams direct current discharge distance driving dynamos effective h.p. hour efficiency electric lighting energy erected expansion fall feet per second flow friction fuel full load gas engines Geneva h.p. per annum heat high pressure hydraulic i.h.p. hour Illustrations inches in diameter Indicated h.p. indicator diagram jacket leakage lighting gas Lord Armstrong loss of pressure low pressure machinery mechanical mechanical efficiency Messrs miles motive power NON-CONDENSING obtained P₁ Paris pipes piston pound power purposes pressure turbines pressure water pulleys pumping quantity re-heated reservoir revolutions per minute Rhône rope Schaffhausen shaft sluices speed square inch steam engine steam power storage stored stroke supply temperature transmitted utilised valve varying volts waste water power wheel Woodcuts Zürich
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