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It - A steam power plant operates on the ideal Rankine cycle. The steam enters the turbine at 7.0 MPa and 550°C. Seam Turhine 7 MP Condee 8 Punp 20 LP Boundary It discharges to the condenser at 20 kPa. Let the steam flow rate be 5 kg/s. The steam receives heat from the combustion gases in the furnace of the steam generator; assume the combustion gases change temperature from 2000 K to 425 K in flowing through the steam generator. The cooling water enters the condenser at 20°C and leaves at 40°C. To is also 20°C. Determine (a) the cycle thermal efficiency, and (b) the cycle irreversibility.

It - A steam power plant operates on the ideal Rankine cycle. The steam enters the turbine at 7.0 MPa and 550°C. Seam Turhine 7 MP Condee 8 Punp 20 LP Boundary It discharges to the condenser at 20 kPa. Let the steam flow rate be 5 kg/s. The steam receives heat from the combustion gases in the furnace of the steam generator; assume the combustion gases change temperature from 2000 K to 425 K in flowing through the steam generator. The cooling water enters the condenser at 20°C and leaves at 40°C. To is also 20°C. Determine (a) the cycle thermal efficiency, and (b) the cycle irreversibility.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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It A steam power plant operates on the ideal Rankine cycle. The steam enters the turbine at 7.0 MPa and 550°C. 550C Seam generator Turbine 7 MPa Condenser 8- 20 P Pump Boundary It discharges to the condenser at 20 kPa. Let the steam flow rate be 5 kg/s. The steam receives heat from the combustion gases in the furnace of the steam generator; assume the combustion gases change temperature from 2000 K to 425 K in flowing through the steam generator. The cooling water enters the condenser at 20°C and leaves at 40°C. T, is also 20°C. Determine (a) the cycle thermal efficiency, and (b) the cycle irreversibility. Hint: Heating of the steam in the steam generator from state 1 to state 2 occurs at constant pressure; hence the process is internally reversible, but there is a temperature difference between the water in the steam generator and the combustion gas in the furnace, so there are external irreversibilities associated with the process. In the condensation of steam in the condenser from state 3 to state 4 heat transfers to the surroundings and there is a temperature difference between the system and the surroundings; hence the process is externally irreversible.
Transcribed Image Text:It A steam power plant operates on the ideal Rankine cycle. The steam enters the turbine at 7.0 MPa and 550°C. 550C Seam generator Turbine 7 MPa Condenser 8- 20 P Pump Boundary It discharges to the condenser at 20 kPa. Let the steam flow rate be 5 kg/s. The steam receives heat from the combustion gases in the furnace of the steam generator; assume the combustion gases change temperature from 2000 K to 425 K in flowing through the steam generator. The cooling water enters the condenser at 20°C and leaves at 40°C. T, is also 20°C. Determine (a) the cycle thermal efficiency, and (b) the cycle irreversibility. Hint: Heating of the steam in the steam generator from state 1 to state 2 occurs at constant pressure; hence the process is internally reversible, but there is a temperature difference between the water in the steam generator and the combustion gas in the furnace, so there are external irreversibilities associated with the process. In the condensation of steam in the condenser from state 3 to state 4 heat transfers to the surroundings and there is a temperature difference between the system and the surroundings; hence the process is externally irreversible.
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