A steam turbine receives steam from a boiler at 8 MPa and 480oC. After some time, a third of the steam is used for process heating at 6.5 Mpa after the remaining steam was reheated at 5 MPa and 460oC. A third of the steam is again extracted for process heating at 4 Mpa after the remaining steam was again reheated at 2 MPa and 450oC. The remaining steam continues to expand in the turbine and is then cooled in the condenser at 0.5 Mpa. If the total mass circulated in the system is 100 kg/s and the thermal plant behaves as an ideal vapor cycle, (Note: All FWH used in the cycle is open.) Determine: a. The schematic diagram of the thermal plant b. The T-S diagram of the thermal plant c. The enthalpies on each state d. The total heat added e. The total heat rejected f. The amount of cooling water needed in the condenser if the cooling water’s temperature difference is 15 K. g. The total power generated by the turbine h. The total pump work in the cycle i. The Thermal Efficiency of the cycle j. The Carnot Cycle Efficiency of the thermal plant k. Summary of the properties of the Thermal Plant
A steam turbine receives steam from a boiler at 8 MPa and 480oC. After some time, a third of the
steam is used for process heating at 6.5 Mpa after the remaining steam was reheated at 5 MPa and 460oC.
A third of the steam is again extracted for process heating at 4 Mpa after the remaining steam was again
reheated at 2 MPa and 450oC. The remaining steam continues to expand in the turbine and is then cooled
in the condenser at 0.5 Mpa. If the total mass circulated in the system is 100 kg/s and the thermal plant
behaves as an ideal vapor cycle, (Note: All FWH used in the cycle is open.)
Determine:
a. The schematic diagram of the thermal plant
b. The T-S diagram of the thermal plant
c. The enthalpies on each state
d. The total heat added
e. The total heat rejected
f. The amount of cooling water needed in the condenser if the cooling
water’s temperature difference is 15 K.
g. The total power generated by the turbine
h. The total pump work in the cycle
i. The Thermal Efficiency of the cycle
j. The Carnot Cycle Efficiency of the thermal plant
k. Summary of the properties of the Thermal Plant
Step by step
Solved in 7 steps with 6 images
