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3- (15 points) The T-s diagram for a steam power cycle is shown below. If the...
Question 3 [30 marks] A reheat Rankine cycle is designed for a steam power plant. Steam...
Question 3 [30 marks] A reheat Rankine cycle is designed for a steam power plant. Steam enters both the high- and low- pressure turbines at 600oC. The maximum and minimum pressures of the cycle are 20 MPa and 20 kPa, respectively. Steam leaves the condenser as a saturated liquid. The moisture content of the steam at the exit of the low-pressure turbine is 4% if the actual expansion process is adiabatic; 8.5% if the ideal expansion process is isentropic. The...
An Actual Steam Power Cycle A steam power plant operates on the cycle. If the isentropic...
An Actual Steam Power Cycle A steam power plant operates on the cycle. If the isentropic efficiency of the turbine is 87 percent and the isentropic efficiency of the pump is 85 percent, determine (a) the thermal efficiency of the cycle and (b) the net power output of the plant for a mass flow rate of 15 kg/s. 15.9 MPa 35°C 15.2 MPa 625°C Boller 15 MPa 5 t 600 C 16 MPa 4 Wturb,out Turbine M7, 0.87 pump.in Pump...
Consider a steam power plant which operates on the simple ideal Rankine cycle (shown in the...
Consider a steam power plant which operates on the simple ideal
Rankine cycle (shown in the next page), where the boiler pressure
is 3 MPa and the condenser saturation temperature is 50°C. The
temperature at the exit of the boiler is 500°C. Water leaves the
condenser as a saturated liquid. The mass flow rate through each
component is 15 kg/s. Calculate:
1. The power output of the steam power plant
2. The thermal efficiency of the steam power plant
Now,...
Consider a steam power plant that operates on a reheat Rankine cycle and has a net...
Consider a steam power plant that operates on a reheat Rankine cycle and has a net power output of 80 MW. Steam enters the high-pressure turbine at 10 MPa and 550°C and the low-pressure turbine at 1 MPa and 550°C. Steam leaves the condenser as a saturated liquid at a pressure of 10 kPa. The isentropic efficiency of the turbine is 80 percent, and that of the pump is 95 percent. Show the cycle on a T-s diagram with respect...
Section B – combined cycles Overview: a combined gas – steam power cycle in Sweden provides...
Section B – combined cycles Overview: a combined gas – steam power cycle in Sweden provides electricity and hot water for heating duties for a small city. The gas turbine drives an electricity generator with an efficiency of 97%. A sub-critical coal fired boiler is used as a heat recovery steam generator, as well as providing additional steam from coal during the winter months. The steam turbine drives an electricity generator with an efficiency of 95%. The plant is located...
Thermo (25) 7. A steam power plant operates on the Rankine cycle with steam entering the...
Thermo
(25) 7. A steam power plant operates on the Rankine cycle with steam entering the high pressure turbine at 1500 psi, 1000'C with a mass flow rate of 5x10lb/hr. The steam exits the high pressure turbine at 90 psi, 350°F where the steam is then sent back to the boiler and reheated to 900°F before expanding through the low pressure turbine to 1 psi. Cooling water enters the condenser from a lake at 65°F and exits at 90°F Assume...
Consider a power plant with water as working fluid that operates on a reheat Rankine cycle...
Consider a power plant with water as working fluid that operates on a reheat Rankine cycle and has a net power output of 75 MW. Steam enters the high-pressure turbine at 10 MPa and 400°C and the low-pressure turbine at 1 MPa and 400°C. Water leaves the condenser as a saturated liquid at a pressure of 100 kPa. The isentropic efficiency of the high-pressure turbine is 85% and the low-pressure turbine in 100%. The pump has an isentropic efficiency of...
2. Consider a combined gas steam power cycle. The gas cycle is a simple Brayton cycle...
2. Consider a combined gas steam power cycle. The gas cycle is a
simple Brayton cycle that has a pressure ratio of 7. Air enters at
9.8 kg / s at the compressor at 15 ° C and 100 kPa, and at the gas
turbine at 950 ° C. The steam cycle is a Rankine cycle with
overheating between the pressure limits of 6 MPa and 10 kPa. The
water vapor is heated in the heat exchanger at a rate...
1. A Steam Power Plant that operates on an ideal regenerative Rankine Cycle with an open...
1. A Steam Power Plant that operates on an ideal regenerative Rankine Cycle with an open feedwater heater is considered. The turbine inlet conditions are 6 MPa, 450 C. The regeneration pressure is 0.4 MPa. The condenser pressure is 20 kPa. a) Draw the T-s diagram, and the sketch of the steam power plant. b) Calculate the low pressure pump work. c) Calculate the high pressure pump work. d) Calculate the fraction of the steam extracted from the turbine for...
Problem 4 In the vapor power cycle shown below, steam (H20) is the working fluid. Saturated...
Problem 4 In the vapor power cycle shown below, steam (H20) is the working fluid. Saturated vapor enters the turbine at 100 bar and saturated liquid exits the condenser at a pressure of 0.1 bar. The net power output of the cycle, Weycle, is 150 MW. Isentropic efficiency of the turbine and the pump (n (hi-h2)/(h1-h2s), np=(h25-h1)/(h2-h1)) are both 80%. Determine the followings. [30 pts] (a) Thermal efficiency, n (b) Mass flow rate of the steam, m, in kg/s (c)...
An Actual Steam Power Cycle A steam power plant operates on the cycle. If the isentropic efficiency of the turbine is 87 percent and the isentropic efficiency of the pump is 85 percent, determine (a) the thermal efficiency of the cycle and (b) the net power output of the plant for a mass flow rate of 15 kg/s. 15.9 MPa 35°C 15.2 MPa 625°C Boller 15 MPa 5 t 600 C 16 MPa 4 Wturb,out Turbine M7, 0.87 pump.in Pump...
Consider a steam power plant which operates on the simple ideal
Rankine cycle (shown in the next page), where the boiler pressure
is 3 MPa and the condenser saturation temperature is 50°C. The
temperature at the exit of the boiler is 500°C. Water leaves the
condenser as a saturated liquid. The mass flow rate through each
component is 15 kg/s. Calculate:
1. The power output of the steam power plant
2. The thermal efficiency of the steam power plant
Now,...
Thermo
(25) 7. A steam power plant operates on the Rankine cycle with steam entering the high pressure turbine at 1500 psi, 1000'C with a mass flow rate of 5x10lb/hr. The steam exits the high pressure turbine at 90 psi, 350°F where the steam is then sent back to the boiler and reheated to 900°F before expanding through the low pressure turbine to 1 psi. Cooling water enters the condenser from a lake at 65°F and exits at 90°F Assume...
Consider a power plant with water as working fluid that operates on a reheat Rankine cycle and has a net power output of 75 MW. Steam enters the high-pressure turbine at 10 MPa and 400°C and the low-pressure turbine at 1 MPa and 400°C. Water leaves the condenser as a saturated liquid at a pressure of 100 kPa. The isentropic efficiency of the high-pressure turbine is 85% and the low-pressure turbine in 100%. The pump has an isentropic efficiency of...
2. Consider a combined gas steam power cycle. The gas cycle is a
simple Brayton cycle that has a pressure ratio of 7. Air enters at
9.8 kg / s at the compressor at 15 ° C and 100 kPa, and at the gas
turbine at 950 ° C. The steam cycle is a Rankine cycle with
overheating between the pressure limits of 6 MPa and 10 kPa. The
water vapor is heated in the heat exchanger at a rate...
1. A Steam Power Plant that operates on an ideal regenerative Rankine Cycle with an open feedwater heater is considered. The turbine inlet conditions are 6 MPa, 450 C. The regeneration pressure is 0.4 MPa. The condenser pressure is 20 kPa. a) Draw the T-s diagram, and the sketch of the steam power plant. b) Calculate the low pressure pump work. c) Calculate the high pressure pump work. d) Calculate the fraction of the steam extracted from the turbine for...
Problem 4 In the vapor power cycle shown below, steam (H20) is the working fluid. Saturated vapor enters the turbine at 100 bar and saturated liquid exits the condenser at a pressure of 0.1 bar. The net power output of the cycle, Weycle, is 150 MW. Isentropic efficiency of the turbine and the pump (n (hi-h2)/(h1-h2s), np=(h25-h1)/(h2-h1)) are both 80%. Determine the followings. [30 pts] (a) Thermal efficiency, n (b) Mass flow rate of the steam, m, in kg/s (c)...
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