Heat engineering; a text book of applied thermodynamics for engineers and students in technical schools . Fig. 72.—T-S diagram of Rankinecycle with incomplete expansion. Fig. 73.—Effect of increasing tem-perature range. the Rankine cycle without and with complete expansion. Theyare not true representations since the lines of Figs. 70 and 72represent additions of heat and not of substance as is the caseon the actual cycle. Because the heat added in the figures onthe various lines represents the heat added on the lines with thesubstance the figures are used to represent this cycle. More-over, th
Heat engineering; a text book of applied thermodynamics for engineers and students in technical schools . Fig. 72.—T-S diagram of Rankinecycle with incomplete expansion. Fig. 73.—Effect of increasing tem-perature range. the Rankine cycle without and with complete expansion. Theyare not true representations since the lines of Figs. 70 and 72represent additions of heat and not of substance as is the caseon the actual cycle. Because the heat added in the figures onthe various lines represents the heat added on the lines with thesubstance the figures are used to represent this cycle. More-over, the area of the figure 1234 of Fig. 70 or 123456 of Fig. 72represents the difference between Q\ and Q2 and hence repre-sents the work. The efficiency is represented by the area of the cycle dividedby the total area beneath 4-1 in Fig. 70 or 72 and hence, if thetemperature is increased, both of these areas become greater andthe efficiency is increased. This is shown by 61-I of Fig. 73. 4611234 461234m ~ 846x1 7 > 84617 176 HEAT ENGINEERING If, now, the lower temperature is lowered from 3 to 3, th
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