A power-generating unit runs the simple Rankine cycle with a mass flow rate of 24,000 kg/h. Water leaves the pump at 10 MPa and 60°C and enters the boiler at the same state. The steam exits the boiler at 650°C and pressure drop in the boiler is negligible. However, the steam pressure drops to 9.5 MPa in the piping between the boiler exit and the turbine inlet, and ultimately enters the turbine at 625°C. At the inlet of the condenser, the water is at 30 kPa and has a quality of 95%. There is a 10 kPa pressure drop in the condenser and the water leaves the condenser subcooled by 3.06°C. The water enters the pump in the same state that it leaves the condenser.

A power-generating unit runs the simple Rankine cycle with a mass flow rate of 24,000 kg/h. Water leaves the pump at 10 MPa and 60°C and enters the boiler at the same state. The steam exits the boiler at 650°C and pressure drop in the boiler is negligible. However, the steam pressure drops to 9.5 MPa in the piping between the boiler exit and the turbine inlet, and ultimately enters the turbine at 625°C. At the inlet of the condenser, the water is at 30 kPa and has a quality of 95%. There is a 10 kPa pressure drop in the condenser and the water leaves the condenser subcooled by 3.06°C. The water enters the pump in the same state that it leaves the condenser.

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 gas-turbine power plant operates on the simple Brayton cycle between the pressure limits of 100 and 1200 kPa. The working fluid is air, which enters the compressor at 30°C at a rate of 150 m3/min and leaves the turbine at 500°C. Using constant specific heats for air and assuming a compressor isentropic efficiency of 82 percent and a turbine isentropic efficiency of 88 percent, determine (a) the net power output, (b) the work ratio, and (c) the thermal efficiency.
A gas-turbine power plant operates on the simple Brayton cycle between the pressure limits of 200 and 1500 kpa. The working fluid as air, which enters the compressor at 30C at a rate of 20 kg/s and enters at the turbine at 900k. Using variable specific heats for air and assuming a compressor isoentropic afficiency of 90 % and a turbine isentropic efficiency of 100%, determine a) the net power output, b) the back work ratio, and c) the thermal efficiency
A steam power plant operates on a simple ideal Rankine cycle between the pressure limits of3 MPa and 50 kPa. The temperature of the steam at the turbine inlet is 300°C, and the massflow rate of steam through the cycle is 35 kg/s. Show the cycle on a T-s diagram with respectto saturation lines, and determine (a) the thermal efficiency of the cycle and (b) the net poweroutput of the power plant.
A gas-turbine power plant operates on the simple Brayton cycle between the pressure limits of 100 and 1600 kPa. The working fluid is air, which enters the compressor at 40C at a rate of 850 m3/min and leaves the turbine at 650C. Using variable specific heats for air and assuming a compressor isentropic efficiency of 85 percent and a turbine isentropic efficiency of 88 percent, determine (a) the net power output, (b) the back work ratio, and (c) the thermal efficiency.
A simple rankine ideal cycle with water as the working fluid. Twenty kilograms of steam enters the turbine at 7.356 MPa and 500.356 oC and is cooled in the condenser at a pressure of 10.356 KPa by running cooling water from a lake through the tubes of the condenser at rate of 2000 kg. Show the T-s diagram and schematic of simple rankine cycle. For cycle determin (a) the turbine work, (b) the heat added, (c) the temperature rise of the cooling water, (d) the thermal efficiency of the cycle. For engine, determine (e) the heat added, (f) the thermal efficiency of the engine, and (g) Draw the T-s and schematic diagram.
A simple Rankine cycle has a pump with an isentropic efficiency of 70%. The inlet and outlet pressures of the turbine are 6 MPa and 0.075 MPa, respectively, and steam enters the turbine at 550°C. Determine a) the isentropic efficiency of the turbine if the quality at the turbine outlet is to be ? = 1, b) the thermal efficiency of the cycle, c) the rate of heat input into the boiler if the net power output of the cycle is 10 MW.
A stationary gas-turbine power plant operates on an ideal regenerative Brayton cycle (∊ = 100 percent) with air as the working fluid. Air enters the compressor at 95 kPa and 290 K and the turbine at 880 kPa and 1100 K. Heat is transferred to air from an external source at a rate of 30,000 kJ/s. Determine the power delivered by this plant accounting for the variation of specific heats with temperature.
A stationary gas-turbine power plant operates on a simple ideal Brayton cycle with air as the working fluid. The air enters the compressor at 95 kPa and 290 K and the turbine at 760 kPa and 1100 K. Heat is transferred to air at a rate of 35,000 kJ/s. Determine the power delivered by this plant accounting for the variation of specific heats with temperature.
A stationary gas-turbine power plant operates on an ideal regenerative Brayton cycle (∊ = 100 percent) with air as the working fluid. Air enters the compressor at 95 kPa and 290 K and the turbine at 880 kPa and 1100 K. Heat is transferred to air from an external source at a rate of 30,000 kJ/s. Determine the power delivered by this plant assuming constant specific heats for air at room temperature.
A gas-turbine power plant operates on the simple Brayton cycle between the pressure limits of 100 and 1600 kPa. The working fluid is air, which enters the compressor at 40°C at a rate of 850 m3 /min and leaves the turbine at 650°C. Assuming a compressor isentropic efficiency of 85 percent and a turbine isentropic efficiency of 88 percent, determine the thermal efficiency. Use constant specific heats with cv = 0.821 kJ/ kg·K, cp = 1.108 kJ/kg·K, and k = 1.35.
In a Rankine Cycle , saturated liquid water at 1 bar is compressed isentropically to 150 bar. First by heating in a boiler and then by superheating at constant pressure of 150 Bar, the water substance is brought to 750 K. After Adiabatic reversible expansion in a turbine at 1 Bar, it is then cooled in a condenser to a saturated liquid. How much work is generated in the turbine? (include diagram)
Steam generated at a power plant at 8.0 MPa and 600.°C is fed to a turbine. Exhaust from the turbine enters a condenser at 25 kPa where it is condensed to a saturated liquid, which is then pumped to the boiler. What is the thermal efficiency of a Rankine cycle with a reversible adiabatic turbine operating at these conditions?