Saturated liquid water at 10 kPa leaves the condenser of a steam power plant and is...
Saturated liquid water at 10 kPa leaves the condenser of a steam power plant and is pumped to the boiler pressure of 5 MPa. Calculate the work for an isentropic pumping process in kJ/kg.
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Saturated liquid water at 10 kPa leaves the condenser of a steam
power plant and is...
Problem 5-Irreversible Power cycle A simple power plant cycle has saturated liquid water from a c...
Problem 5-Irreversible Power cycle A simple power plant cycle has saturated liquid water from a condenser at 100 kPa pumped into a boiler operating at 1.0 MPa. The steam leaves the boiler at 350 °C and is expanded through a turbine with the exit stream having a quality between 0 and 1. If the turbine is 80% efficient and the pump is 90% efficient in this Rankine cycle, what is the overall efficiency of the power cycle?
Problem 5-Irreversible Power...
Problem 5-Irreversible Power cycle A simple power plant cycle has saturated liquid water from a condenser...
Problem 5-Irreversible Power cycle A simple power plant cycle has saturated liquid water from a condenser at 100 kPa pumped into a boiler operating at 1.0 MPa. The steam leaves the boiler at 350 °C and is expanded through a turbine with the exit stream having a quality between 0 and 1. If the turbine is 80% efficient and the pump is 90% efficient in this Rankine cycle, what is the overall efficiency of the power cycle?
You are to analyze a simple steam power plant. At the boiler exit, the pressure is...
You are to analyze a simple steam power plant. At the boiler exit, the pressure is 8 MPa and the temperature is 1000 °C. The turbine isentropic efficiency is 85%. The condenser pressure is 15 kPa and the water is a saturated liquid at the condenser exit. The pump isentropic efficiency is 80%. Answer the following: a) What is the quality at the exit in %, if the turbine is assumed isentropic? b) What is the work output of the...
3-40 In the condenser of a steam power plant the steam from the turbine enters the...
3-40 In the condenser of a steam power plant the steam from the turbine enters the condenser at 0.10 bar with a quality of 95 percent and leaves at the same pressure as a saturated liquid. The steam is condensed by transferring heat to a stream of cooling water which enters at 1.3 bars and 5°C and leaves the heat exchanger at 1.2 bars and 25°C·The environmental temperature is 5°C. Determine a. the change in stream availability (exergy) of the...
a) A steam power plant operates on an ideal reheat-regenerative Rankine cycle. Steam enters the high-pressure...
a) A steam power plant operates on an ideal reheat-regenerative Rankine cycle. Steam enters the high-pressure turbine (HPT) at a pressure of 10 MPa and temperature of 550°C. The steam expands through the HPT stage to a pressure of 0.6 MPa. Some of the steam at the end of the expansion process in HPT is extracted for a regeneration process in a closed-type feedwater heater. The steam leaves the heater as a saturated liquid and then is throttled to the...
In a steam power plant, water is pressurized in an adiabatic pump from 100kPa as a saturated liqu...
In a steam power plant, water is pressurized in an adiabatic pump from 100kPa as a saturated liquid to 5 MPa at 150C. The pump is directly driven by an adiabatic steam turbine, which also powers a generator. Steam enters the steam turbine at 5 MPa and 450C and leaves as saturated vapor at 100kPa. Determine the net-work output of the pump-turbine-generator combination if the generator operates at 85% efficiency. (in kJ/kg) ) b) Determine the entropy generation for both...
In the power plant shown in Figure P2 below, steam leaves the boiler at p3 P2...
In the power plant shown in Figure P2 below, steam leaves the boiler at p3 P2 6 MPa and ??-320°C, flows through the throttling valve, which drops the pressure to p4-4 MPa. then enters the turbine in which it expands to the condenser pressure of p5-10 kPa. The water then leaves the condenser at p 10 kPa and T1-40°C. The net power output is 450 MW. The turbine isentropic efficiency is 85% and that of the pump is 78%. Determine:...
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...
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 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...
Problem 5-Irreversible Power cycle A simple power plant cycle has saturated liquid water from a condenser at 100 kPa pumped into a boiler operating at 1.0 MPa. The steam leaves the boiler at 350 °C and is expanded through a turbine with the exit stream having a quality between 0 and 1. If the turbine is 80% efficient and the pump is 90% efficient in this Rankine cycle, what is the overall efficiency of the power cycle?
Problem 5-Irreversible Power...
Problem 5-Irreversible Power cycle A simple power plant cycle has saturated liquid water from a condenser at 100 kPa pumped into a boiler operating at 1.0 MPa. The steam leaves the boiler at 350 °C and is expanded through a turbine with the exit stream having a quality between 0 and 1. If the turbine is 80% efficient and the pump is 90% efficient in this Rankine cycle, what is the overall efficiency of the power cycle?
3-40 In the condenser of a steam power plant the steam from the turbine enters the condenser at 0.10 bar with a quality of 95 percent and leaves at the same pressure as a saturated liquid. The steam is condensed by transferring heat to a stream of cooling water which enters at 1.3 bars and 5°C and leaves the heat exchanger at 1.2 bars and 25°C·The environmental temperature is 5°C. Determine a. the change in stream availability (exergy) of the...
a) A steam power plant operates on an ideal reheat-regenerative Rankine cycle. Steam enters the high-pressure turbine (HPT) at a pressure of 10 MPa and temperature of 550°C. The steam expands through the HPT stage to a pressure of 0.6 MPa. Some of the steam at the end of the expansion process in HPT is extracted for a regeneration process in a closed-type feedwater heater. The steam leaves the heater as a saturated liquid and then is throttled to the...
In a steam power plant, water is pressurized in an adiabatic pump from 100kPa as a saturated liquid to 5 MPa at 150C. The pump is directly driven by an adiabatic steam turbine, which also powers a generator. Steam enters the steam turbine at 5 MPa and 450C and leaves as saturated vapor at 100kPa. Determine the net-work output of the pump-turbine-generator combination if the generator operates at 85% efficiency. (in kJ/kg) ) b) Determine the entropy generation for both...
In the power plant shown in Figure P2 below, steam leaves the boiler at p3 P2 6 MPa and ??-320°C, flows through the throttling valve, which drops the pressure to p4-4 MPa. then enters the turbine in which it expands to the condenser pressure of p5-10 kPa. The water then leaves the condenser at p 10 kPa and T1-40°C. The net power output is 450 MW. The turbine isentropic efficiency is 85% and that of the pump is 78%. Determine:...
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 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...
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