1. Power Generation OBJECTIVE To examine vapor power plants in which the working fluid is vaporized and condensed

2. HEAT ENGINES cyclic processes are used to convert thermal energy to useful work problem is to design to maximize efficiency, , of conversion condenser boiler WsWs WsWs QcQc QHQH

3. Power Generation

4. Carnot Cycle Efficiency Carnot cycle is the most efficient

5. Example A steam plant operating under a Carnot cycle, uses steam at 100 C in the condenser and a pressure of 3 MPa at 600 C in the boiler. Assuming the pump and turbine operate reversibly, compute the efficiency of the cycle.

6. Ideal Rankine Cycle standard for fossil fuel-burning power plants  isentropic pumping of liquid to boiler pressure  constant pressure heating in boiler  isentropic expansion in turbine  constant T,P condensation condenser boiler WtWt WpWp QcQc QHQH

7. Example An ideal Rankine power station uses steam at 100 ºC in the condenser and a pressure of 3 MPa at 600 ºC in the boiler. Assuming the pump and turbine operate reversibly, compute the efficiency of the cycle.