A New Theory of the Steam Engine And the Mode of Calculation By Means of It O
A New Theory of the Steam Engine And the Mode of Calculation By Means of It O
F M Franois Marie Guyonneau De Pambour
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The only remark we shah 1 make on the subject of these formulse is, that the load suitable to the pro- ducing of the absolute maximum useful effect is not the maximum load that may be imposed on the engine. In effect, from equation (12), we know that the maxi- mum load for the engine takes place when L' = L, and not when Thus the greatest possible load of the engine is that of the maximum useful effect without expansion ; but by applying a lighter load, that of equation (22), and at the same ti...me the expansion of equation (30), a still greater useful effect will be obtained. PART III. APPLICATION OF THE FORMULA TO THE VARIOUS SYSTEMS OF STEAM-ENGINES. WE shall not give here the applications to different systems of steam-engines, which are developed in this part of the work. We shall confine ourselves to what concerns Watt's steam-engines, because they are the most generally employed in the arts. Watt's rotative double-acting steam-engine. These engines being without expansion, the proper formulae for calculating their effects will be deduced from the general formulse by making L' = L, which will give also K = 1, and by replacing the quantity p by the pressure of condensation.
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