Air as an ideal gas flows through the turbine and heat ex- changer arrangement shown in Fig. Data for the two flow streams are shown on the figure. Heat transfer to the sur- roundings can be neglected, as can all kinetic and potential en- ergy effects. Determine T3, in K, and the power output of the second turbine, in kW, at steady state. W11 = 10,000 kW W2 = ? Turbine Turbine 1 2 P3 = 4.5 bar T3 = ? T2 = 1100 K P2 = 5 bar T4 = 980 K P4 = 1 bar Air www twwww in 2 3 4 T = 1400 K P1 = 20 bar T5 = 1480 K 5 P5 = 1.35 bar ṁ3 = 1200 kg/min 6. Heat exchanger V T6 = 1200 K %3D P6 = 1 bar Air in

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Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.