Suppose a power plant is operating on an ideal cycle. What is a reasonable value for...
Suppose a power plant is operating on an ideal cycle. What is a reasonable value for the maximum possible temperature of the high temperature thermal reservoir? What physical limitations prevent you from arbitrarily increasing this temperature? What is a reasonable expectation for the low temperature thermal reservoir? Why can you not arbitrarily reduce this value? Based on the values that you have selected, what is the maximum reasonable thermal efficiency of a thermal power plant?
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Suppose a power plant is operating on an ideal cycle. What is a
reasonable value for...
Example: Consider a steam power plant operating on the ideal reheat Rankine cycle. Steam enters the...
Example: Consider a steam power plant operating on the ideal reheat Rankine cycle. Steam enters the high-pressure turbine at 15 MPa and 600 °C and is condensed in the condenser at a pressure of 10 kPa. If the moisture content of the steam at the exit of the low-pressure turbine is not to exceed 10.4 percent, determine (a) the pressure at which the steam should be reheated and (b) the thermal efficiency of the cycle. Assume the steam is reheated...
Q1: What is the cycle efficiency of an ideal Rankine cycle with Refrigerant R134a operating between 8 bar and 1 bar and...
Q1: What is the cycle efficiency of an ideal Rankine cycle with Refrigerant R134a operating between 8 bar and 1 bar and at a maximum cycle temperature of 150C? Q2: Suggest a condenser pressure for an ideal Rankine cycle using water as a working fluid that uses a lake as a thermal reservoir to reject heat to if the lake can sometimes reach temperatures of 25C. The pressure should be chosen to maximize cycle efficiency
Thermodynamics 1 A thermal power plant based on an ideal reheat cycle uses steam as the...
Thermodynamics
1 A thermal power plant based on an ideal reheat cycle uses steam as the operating fluid and is operated between 800 psi and 2 psi. The pressure and temperature at the turbine inlet are 800 psi and 750° F. The steam is expanded in the turbine to 80 psi and then reheated to 700° F. The steam is then expanded to 2 psi. (a) Show the schematic identifying the major components in the power plant, i.e. boiler, turbine,...
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,...
A steam power plant operates on an ideal reheat Rankine cycle between the pressure limits of...
A steam power plant operates on an ideal reheat Rankine cycle between the pressure limits of 5 MPa and 100 kPa. The temperature of the steam att the turbine is 500 C degree and the mass flow rate of steam through the cycle is 35 kg/s. a) Determine the thermal efficiency of the cycle. b) determine the net power output of the power plant ( Assume both the turbine and the pump have isentropic efficiency of 100%). c) Draw the...
Q-1 What is irreversibility in a power plant, what are types of irreversibility?
Q-1 What is irreversibility in a power plant, what are types of irreversibility?Q-2 What is a pinch point? What is its effect on the size and efficiency of the steam generator?Q-3 What is the mean temperature of heat addition? What is its effect on cycle efficiency? Explain the different methods by which the mean temperature of heat addition can be increased.Q-4 How is the maximum and minimum pressure of a steam cycle is decided - How can we address the...
Steam enters the turbine of a power plant operating on the Rankine cycle at 3300 kPa...
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 temperature of 550°C. The Rankine cycle is shown in the following figure: The thermal efficiency of the cycle is O The quality of the exhaust steam is...
2) A steam power plant operates on an ideal regenerative rankine cycle with superheated steam leaving...
2) A steam power plant operates on an ideal regenerative rankine cycle with superheated steam leaving the boiler, entering the turbine at 10 mPa,600C. X fraction of steam is extracted from the turbine at 0.6 mPa pressure for the high pressure open feedwater heater. Then x fraction more of steam is extracted from the turbine at 0.2 mPa pressure for the low pressure open feedwater heater . The condenser pressure in the cycle is 5 kPa. The mass flow rate...
Q1. A steam power plant operates on a simple ideal Rankine cycle between the pressure limits...
Q1. A steam power plant operates on a simple ideal Rankine cycle between the pressure limits of 4 MPa and 50 kPa. The temperature of the steam at the turbine inlet is 300°C, and the mass flow rate of steam through the cycle is 35 kg/s. Show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the thermal efficiency of the cycle and (b) the net power output of the power plant. 02
Example: Consider a steam power plant operating on the ideal reheat Rankine cycle. Steam enters the high-pressure turbine at 15 MPa and 600 °C and is condensed in the condenser at a pressure of 10 kPa. If the moisture content of the steam at the exit of the low-pressure turbine is not to exceed 10.4 percent, determine (a) the pressure at which the steam should be reheated and (b) the thermal efficiency of the cycle. Assume the steam is reheated...
Thermodynamics
1 A thermal power plant based on an ideal reheat cycle uses steam as the operating fluid and is operated between 800 psi and 2 psi. The pressure and temperature at the turbine inlet are 800 psi and 750° F. The steam is expanded in the turbine to 80 psi and then reheated to 700° F. The steam is then expanded to 2 psi. (a) Show the schematic identifying the major components in the power plant, i.e. boiler, turbine,...
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,...
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 temperature of 550°C. The Rankine cycle is shown in the following figure: The thermal efficiency of the cycle is O The quality of the exhaust steam is...
2) A steam power plant operates on an ideal regenerative rankine cycle with superheated steam leaving the boiler, entering the turbine at 10 mPa,600C. X fraction of steam is extracted from the turbine at 0.6 mPa pressure for the high pressure open feedwater heater. Then x fraction more of steam is extracted from the turbine at 0.2 mPa pressure for the low pressure open feedwater heater . The condenser pressure in the cycle is 5 kPa. The mass flow rate...
Q1. A steam power plant operates on a simple ideal Rankine cycle between the pressure limits of 4 MPa and 50 kPa. The temperature of the steam at the turbine inlet is 300°C, and the mass flow rate of steam through the cycle is 35 kg/s. Show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the thermal efficiency of the cycle and (b) the net power output of the power plant. 02
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