. Applied thermodynamics for engineers. CONSTANT VOLUME ■^S^^* Fig. 125. Arts. 298, 301, 302.—Lenoir Cycle. Fig. 126. Art. 298. —EntropyDiagram, Lenoir Cycle. falls, gh, until it reaches that of the atmosphere, and the gases are finallyexpelled on the return stroke, liA. It is a tivo-cyde engine. The netentropy diagram appears in Fig. efficiency is Heat absorbed - heat rejected _ Z(7}- - To) - l{Tg - Tu) - k(l\ - Ta) Heat absorbed = 1 Tf-Ta KTf-Ta)^ Tf-T. 299. Brayton Cycle. This is shown in Fig. 127. A separatepump is employed. The substance is drawn in along Ad^ compressedalong dn^ a

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. Applied thermodynamics for engineers. CONSTANT VOLUME ■^S^^* Fig. 125. Arts. 298, 301, 302.—Lenoir Cycle. Fig. 126. Art. 298. —EntropyDiagram, Lenoir Cycle. falls, gh, until it reaches that of the atmosphere, and the gases are finallyexpelled on the return stroke, liA. It is a tivo-cyde engine. The netentropy diagram appears in Fig. efficiency is Heat absorbed - heat rejected _ Z(7}- - To) - l{Tg - Tu) - k(l\ - Ta) Heat absorbed = 1 Tf-Ta KTf-Ta)^ Tf-T. 299. Brayton Cycle. This is shown in Fig. 127. A separatepump is employed. The substance is drawn in along Ad^ compressedalong dn^ and forced into a reservoir along nB. The engine beginsto take a charge from the reservoir at B^ which is slowly fed in andignited as it enters, so that combustion proceeds at the same rate asthe piston movement, giving the constant pressure line Bh. Expan-sion then occurs along hg, the exhaust valve opens at g^ and thecharge is expelled along hA. The net cycle is dnhgh, the net idealentropy diagram is as in Fig. 128. This is also

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