A steam power plant operates on a Rankine cycle. Steam enters the turbine at 4 MPa, 350°C and exits at a pressure of 15 kPa. Then it enters the condenser and exits as saturated water and the boiler feed pump delivers the water back to the boiler. The thermodynamic properties of the working fluid are given in the tables below. Consider an adiabatic efficiency of the turbine to be 87 percent. Draw and label the T-s diagram and solve for the following: 4.1 Turbine work. 4.2 Work net output 4.3 Heat supplied to the boiler State @4MPa & 350°C h (kJ/kg) 3092.5 s (kJ/kg-K) v (m³/kg) V 6.5821 0.06645 hg Sr Sg Vr Vg @15 kPa 225.94 2599.1 0.7549 8.0085 0.001014 10.02

A steam power plant operates on a Rankine cycle. Steam enters the turbine at 4 MPa, 350°C and exits at a pressure of 15 kPa. Then it enters the condenser and exits as saturated water and the boiler feed pump delivers the water back to the boiler. The thermodynamic properties of the working fluid are given in the tables below. Consider an adiabatic efficiency of the turbine to be 87 percent. Draw and label the T-s diagram and solve for the following: 4.1 Turbine work. 4.2 Work net output 4.3 Heat supplied to the boiler State @4MPa & 350°C h (kJ/kg) 3092.5 s (kJ/kg-K) v (m³/kg) V 6.5821 0.06645 hg Sr Sg Vr Vg @15 kPa 225.94 2599.1 0.7549 8.0085 0.001014 10.02

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

The pressure in the boiler of a steam power plant operating on the ideal Rankine cycle is 1250 psia. The condenser pressue is 2 psia. The mass flow rate of steam through the system is 75 lbm/s and the quality of the steam at the turbine exit is 0.9. Show the cycle on a T-s diagram, and determine (a) the turbine inlet temperature, (b) the rate of heat input in the boiler, and (c) the thermal efficiency of the cycle.
A basic Rankine steam power plant uses an adiabatic turbine that operates with inlet steam at 6.80 MPa and 550.0 ∘C.The exhaust steam enters the condenser at 50.0 ∘C with a quality of 0.960. Saturated liquid water leaves the isobaric condenser and is pumped to the boiler. Mass flow through the cycle is 2.900 kg/s. Neglecting pump work and kinetic and potential energy changes, determine: the work interaction term of the turbine: the thermal efficiency of the cycle, ?th:
A basic Rankine steam power plant uses an adiabatic turbine that operates with inlet steam at 6.80 MPa and 550.0 ∘C. The exhaust steam enters the condenser at 50.0 ∘C with a quality of 0.960. Saturated liquid water leaves the isobaric condenser and is pumped to the boiler. Mass flow through the cycle is 2.900 kg/s. Neglecting pump work and kinetic and potential energy changes, determine: the work interaction term of the turbine: the thermal efficiency of the cycle, ?th: the second law efficiency of the turbine, ?2nd:
The turbine of a steam power plant operating on a simple ideal Rankine cycle produces 500 kW of power when the boiler is operated at 3.5 MPa, the condenser at 40 kPa, and the temperature at the turbine entrance is 650oC. Determine: (a)the rate of heat supply in the boiler, (b)the rate of heat rejection in the condenser, and (c)the thermal efficiency of the cycle. Answers: (a) 1458 kW, (b) 958 kW, (c) 0.343
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.
Steam enters the turbine of a power plant operating on the Rankine cycle at 3300 kPa and exhausts at 50 kPa. To show the effect of superheating on the performance of the cycle, calculate the thermal efficiency of the cycle and the quality of the exhaust steam from the turbine for turbine-inlet steam temperatures of 450, 500, 5500C.
A basic Rankine steam power plant uses an adiabatic turbine that operates with inlet steam at 6.80 MPa6.80 MPa and 550.0 ∘C.550.0 ∘C. The exhaust steam enters the condenser at 50.0 ∘C50.0 ∘C with a quality of 0.960. Saturated liquid water leaves the isobaric condenser and is pumped to the boiler. Mass flow through the cycle is 1.850 kg/s.1.850 kg/s. Neglecting pump work and kinetic and potential energy changes, determine: the work interaction term of the turbine: © Macmillan Learning A basic Rankine steam power plant uses an adiabatic turbine that operates with inlet steam at 6.80 MPa6.80 MPa and 550.0 ∘C.550.0 ∘C. The exhaust steam enters the condenser at 50.0 ∘C50.0 ∘C with a quality of 0.960. Saturated liquid water leaves the isobaric condenser and is pumped to the boiler. Mass flow through the cycle is 1.850 kg/s.1.850 kg/s. Neglecting pump work and kinetic and potential energy changes, determine: the work interaction term of the turbine: the thermal efficiency of…
A simple power plant utilizing the Rankine Cycle operates with an inlet boiler pressureof 5 MPa and an inlet condenser pressure of 300 kPa. Because of frictional effects, thepressure of the water drops 0.3 MPa in the boiler and 3 kPa in the condenser. Thetemperature of the steam as it enters the turbine is 700 °C. The adiabatic efficiency ofthe pump and of the turbine are 83 percent and 88 percent, respectively. The pumpand the turbine are adiabatic, and the water enters the pump as saturated liquid. It canbe assumed that heat transfer to the water in the boiler is from a reservoir at 1500 K,and the environment is at 25 °C.Determine the thermal efficiency of the cycle and compare it with the thermal efficiencyof (a) a Carnot cycle, and (b) the ideal Rankine Cycle. Specify the amount of entropygenerated in each step of the real cycle
1. Consider a steam power plant that operates on a simple ideal Rankine cycle and has a net power output of45 MW. Steam enters the turbine at 7 MPa and 500°C and iscooled in the condenser at a pressure of 10 kPa by runningcooling water from a lake through the tubes of the condenserat a rate of 2000 kg/s. Show the cycle on a T-s diagram withrespect to saturation lines, and determine (a) the thermal efficiency of the cycle, (b) the mass flow rate of the steam, and(c) the temperature rise of the cooling water. Answers:(a) 38.9 percent, (b) 36 kg/s, (c) 8.4°C 2. Consider a 210-MW steam power plant that operateson a simple ideal Rankine cycle. Steam enters the turbine at10 MPa and 500°C and is cooled in the condenser at a pressure of 10 kPa. Show the cycle on a T-s diagram with respectto saturation lines, and determine (a) the quality of the steamat the turbine exit, (b) the thermal efficiency of the cycle,and (c) the mass flow rate of the steam. Answers: (a) 0.793,(b) 40.2 percent, (c) 165…
A 40 MW steam plant working on the Rankine cycle operates between boiler pressure of 4 MPa and condenser pressure of 10 KPa. The steam leaves the boiler and enters the steam turbine at 400°C. The isentropic η of the steam turbine is 85%. Determine a) The cycle η b) The quality of steam from the turbine and c) The steam flow rate in kg per hour. Consider pump work.
Consider a steam power plant that operates on an ideal regenerative Rankine cycle and has a net power output of 150 MW. Steam enters the turbine at 10 MPa and 500°C and the condenser at 15 kPa. Steam is extracted from the turbine at 0.5 MPa to heat the feedwater in an open feedwater heater. Water leaves the feedwater heater as a saturated liquid. Show the cycle on a T-s diagram, and determine (a) the mass flow rate of steam through the boiler, and (b) the thermal efficiency of the cycle.
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.