80.2K

Verified Solution

Link Copied!

Consider a steam power plant operating on the simple idealRankine cycle. Steam enters the turbine at 15 MPa and 600°C. Thesteam condenses in the condenser at 10 kPa. Use the EES software tostudy the effects of the following cases on the cycle performanceand to sketch the T-s diagram for each case:

Plot the variation of the cycle thermal efficiency with theturbine isentropic efficiency. Take the isentropic efficiency ofthe turbine in the range 70% to 100%.

If the cycle is modified to the ideal reheat Rankine cycle withthe same pressure limits and same maximum temperature, Plot thevariation of the steam quality at the turbine exit and the thermalefficiency with the reheat pressure. Take the range of the reheatpressure from 3 to 8 MPa.

If the cycle is modified to the ideal regenerative Rankine cyclewith the same pressure limits and same maximum temperature, plotthe variation of the thermal efficiency with the extraction(bleeding) pressure ranging from 1 to 3 MPa, with a step of 0.5MPa.

The heat is supplied to the boiler from a heat source (e.g.furnace) of a constant temperature. For the same pressure limitsand same maximum temperature of the cycle, plot the variation ofthe second law efficiency with the heat source temperature rangingfrom 700 to 1200 K. In addition, show the variations of the exergydestroyed in each component of the cycle (boiler, turbine,condenser, pump) with the heat source temperature and identify therooms of improvement in the second-law efficiency

it should be solved by ees.....