A steam power plant operates on the ideal Rankine cycle. The steam enters the turbine at 7.0 MPa and 550°C. Seam eneror Turbine 7 MP Condenser 8- Pump 20 P 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.

A steam power plant operates on the ideal Rankine cycle. The steam enters the turbine at 7.0 MPa and 550°C. Seam eneror Turbine 7 MP Condenser 8- Pump 20 P 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.

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

See similar textbooks

Similar questions

A reheat steam cycle has 13500 kPa throttle pressure at the turbine inlet and 2800 kPa reheat pressure. The throttle and reheat temperature of the steam is 540°C. The condenser pressure is 3.4 kPa. Find the cycle thermal efficiency in %. Note: At 13.5 MPa, tsat = 333.88 deg C, Sf = 3.5921 kJ/kg-K, sg = 5.4022 kJ/kg-K.
Consider a Rankine cycle with reheat in which steam enters the high-rate turbine at 500 psi and 1000 F from which it expands to 120 psi; the latter reheats to 1000 F expanding to 2 psi in the low- rate turbine. Calculate the thermal efficiency of the cycle 500 psia, 1000 F 120 psia 1000 F 2 psia
A power plant operating in a Reheat Rankine Cycle produces steam at 3 MPa, 600oC in the boiler. It keeps the condenser at 45oC by transfer of 10 MW out as heat transfer. The first turbine section (high-pressure) expands to 500 kPa and then flow is reheated followed by the expansion in the low-pressure turbine. Provide a detailed solution. Avoid shortcuts. Find the boiler heat transfer including the reheat process (kW)
A simple Rankine cycle works between the boiler pressure of 5 MPa and condenser pressure of 5 kPa. The steam is dry saturated before the throttling in the turbine. Determine Rankine cycle efficiency work ratio specific steam consumption
n an ideal rankine cycle. Steam is generated at 4.1 mpa and 480C. The condenser is at 32C. For an engine with the same end states, determine its thermal efficiency, steam rate, and mep. Considering the engine only, assume the brake engine efficiency to be 78%, the generator efficiency 92%, the steam flow rate is 163,600 kg/hr. Compute the output of the combined unit.
A reheat steam cycle has 13500 kPa throttle pressure at the turbine inlet and 2800 kPa reheat pressure. The throttle and reheat temperature of the steam is 540°C The condenser pressure is 3.4 kPa. Find the cycle thermal efficiency in %. Note: At 13.5 MPa, tsat = 333.88 deg C, sf = 3.5921 kJ/kg-K, sg = 5.4022 kJ/kg-K
Regenerative Rankine steam power plant operates at boiler pressure of (12.5MPa) and the steam leaves the boiler and enters the turbine at (550°C). Some steam is exerted at pressure of (1MPA) to an open feed water heater. The still steam is continues expanding until condenser pressure of (15kPa). If the plant developed (10MW). Find the mass flow rate of steam in the cycle and the cycle efficiency.
A power plant operating in a Reheat Rankine Cycle produces steam at 3 MPa, 600oC in the boiler. It keeps the condenser at 45oC by transfer of 10 MW out as heat transfer. The first turbine section (high-pressure) expands to 500 kPa and then flow is reheated followed by the expansion in the low-pressure turbine. Provide a detailed solution. Avoid shortcuts. Compute for the Pump work input (kJ/kg)
In an ideal reheat-rgenerative cycle, steam enters the turbine at 6 MPaa and 400 degrees Celsius. After expansion to 1.4 MPaa steam is withdrawn and reheated to 300 degrees Celsius . Extractions for regenerative heating occur at 0.15 MPaa and 1.4 MPaa and the condenser pressure is 0.1 MPaa. Use mass flowrate of 1 kg/s.
Please show the solution. Thank you very mmuch
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…
termo question example