In a 35,000-kW turbogenerator that receives steam at 6.9 MPa and 370°C, 11% of the throttle steam is actually extracted at 2 MPa, 215°C; with the remainder being re heated to 1.8 MPa and 315°C; then 20% of the throttle steam is actually extracted at0.724 MPa, each extraction serving an open feedwater heater. The engine exhaust to a condenser pressure of 0.005 MPa and the temperature of the feedwater from the last heater is 205°C. The combined steam rate of the turbogenerator unit is 4.898 kg/kwh and the generator efficiency is 95%. For the total throttle flow to an ideal engine, find (a) extracted steam for the last heater, (b) W, (c) e. For the actual engine, find (d) e, (e) n. (f) What is the enthalpy of the actual exhaust when the pump efficiency is 60%?

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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.