The steam engine and turbine; a text-book for engineering colleges (1911)
Heck, Robert Culbertson Hays, 1870- · New York, D. Van Nostrand company · leaf 59
plani-meter or by averaging ordinates. Usually, the mean pressure through-out a certain volume change is found, whereupon U = Pn.(v2-vO; (23) but sometimes a work scale per unit oi area is used, like that shown inFig. 31, where the unit of base represents 1 cu. ft. and the same unit ofordinate 1000… … 5 10 Fig. 31. — The Isothermal Curve. relation Pv = PiVi, and desiring to integrate Pdv between the limits Viand V2 which locate the ordinates Al and B2 on Fig. 31, we get P interms of z; as 7. Pl^h § 7 (/)] THERMODYNAMIC OPERATIONS WITH GASES. 45 whence or U = Pv loge r (24) Here r is the ratio of…
Steam-engines · Steam-turbines
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