SITUATIONAL PROBLEM NO IIIn a reheat cycle steam at 8.0MPA and 485degC enters the turbine and expands to 1.4MPA. Atthis point, the steam is withdrawn and passed through a reheater. It reenters the turbine at1.3 MPa and 720degC. Expansion now occurs to the condenser pressure of 0.0006MPa. For thecycle and 1kg of steam determine:4. Heat added5. Work Turbine6. Work NetThermal Efficiency7.

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Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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In a reheat cycle steam at 8.0 MPa and 485C enters the turbine and expands to 1.4 MPa. Atthis point, the steam is withdrawn and passed through a reheater. It re-enters the turbineat 1.3 MPa and 720°C. Expansion now occurs to the condenser pressure of 0.006 MPa.Forthe cycle and 1 kg of steam determine Q.,Wn, W, e, and thesteam flow for an engine and For the engine output of 40,000kW.
In a reheat cycle steam at 8.0 MPa and 485 degrees Celsius enters the turbine and expands to1.4 MPa. At this point, steam is withdrawn and passed through a reheater. It re-enters theturbine at 1.3 MPa and 720 degrees Celsius. Expansion now occurs to condenser pressure of6Kpa. Determine the Qa and the Cycle Efficiency.
Compare the thermal efficiency and turbine-exit quality (temperature if superheated) at the condenser pressure for a simple Rankine cycle and the reheat cycle when the boiler pressure is 5 MPa, the boiler exit temperature is 500°C, and the condenser pressure is 20 kPa. The reheat takes place at 0.5 MPa and the steam leaves the reheater at 500°C. (Enthalpies are in KJ/kg.) Without the reheater, the heat added is: The enthalpy entering the condenser is: The net Work is: The enthalpy entering the reheater is: Without the reheater, the net Work is:
Compare the thermal efficiency and turbine-exit quality (temperature if superheated) at the condenser pressure for a simple Rankine cycle and the reheat cycle when the boiler pressure is 5 MPa, the boiler exit temperature is 500°C, and the condenser pressure is 20 kPa. The reheat takes place at 0.5 MPa and the steam leaves the reheater at 500°C. (Enthalpies are in KJ/kg.) Without the reheater, the enthalpy at the turbine exhaust is: Without the reheater, the quality at the turbine exhaust is: The pump work is: The enthalpy leaving the reheater is: The thermal efficiency is:
Compare the thermal efficiency and turbine-exit quality (temperature if superheated) at the condenser pressure for a simple Rankine cycle and the reheat cycle when the boiler pressure is 5 MPa, the boiler exit temperature is 500°C, and the condenser pressure is 20 kPa. The reheat takes place at 0.5 MPa and the steam leaves the reheater at 500°C. (Enthalpies are in KJ/kg.) Without the reheater, the thermal efficiency is: The temperature at the exhaust of the low-pressure turbine is: The throttle enthalpy is: The heat added in the boiler is: The enthalpy at the suction of the pump is:
In an ideal reheat-regenerative cycle, steam enters the turbine at 4 MPaa and 400°C. After expansion to 1 MPaa steam is withdrawn and reheated to 380°C. Extractions for regenerative heating occur at 0.2 MPaa and 0.02MPaa and the condenser pressure is 0.005MPaa. Use mass flowrate of 1 kg/s.
In a Rankine cycle, steam leaves the boiler and enters the turbine at 4 MPa and 400◦C. The condenser pressure is 10 kPa. Determine the cycle efficienc
In a reheat cycle steam at 15 MPa, 540 ̊C enters the engine and expands to 1.95 MPa.At this point the steam is withdrawn and passed through a reheater. It reenters the engineat 540 ̊C. Expansion now occurs to the condenser pressure of 0.0035 MPa (a) For theideal cycle, find e. (b) A 60,000 kw turbine operates between the same state piontsexcept that the steam enters the reheater at 1.95 MPa and 260 ̊C, departs at 1.8 MPa and540 ̊C. the steam flow is 147,000 kg/hr, generator efficiency is 96%. For actual enginefind ek, mk, and nk.
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.
Steam enters the high-pressure turbine at 15,000 kPa and 873 K in a 15,000-kWsteam power plant that operates on an ideal reheat Rankine cycle. If the condenserpressure is at 10 kPa and the moisture content is 10.4% at the exit of the low-pressureturbine at 4 MPa, determine the cycle thermal efficiency, the specific steamconsumption, and the pump work in kW if the steam is to be reheated to the initialtemperature. Show Ts and PV diagrams
A steam power plant operates under a reheat-regenerative Rankine cycle that utilizes 162 MTPH of steam at 8 MPa and 4000C. After expansion to 2800C, the steam is withdrawn and reheated to 3400C. Extractions for feedwater heating occur at 1.6 MPa and 0.7 MPa. The condenser pressure is 5 kPa. Calculate: (a) the mass flow rate of steam extracted for feedwater heating, in kg/hr (b) the total power required for feedwater pumping, in kW. (c) the net power output of the plant, in MW. (d) the plant thermal efficiency, in %, and (e) the amount of fuel oil, in liters, needed for one day of continuous operation. Assume a heating value of 43.5 MJ/kg, with S.G. = 0.875 and a boiler efficiency of 88%
In an ideal reheat-regenerative cycle, steam enters the turbine at 8.1356Mpa and 400.356oC. After expansion to 280.356oC the steam is withdrawn and reheated to 340oC. Extractions for feedwater heating occur at 1.6356Mpa and 0.70356Mpa and condenser pressure is 0.005356 Mpa.a) For ideal cycle, find thermal effieciency of the cycle. b) Draw the schematic diagram and T-s diagram with label

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