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In a reheat-cycle power plant, steam enters the high-pressure turbine at 5 MPa, 450°C, and expands...
A steam power plant operates on the reheat Rankine cycle. Steam enters the high-pressure turbine at...
A steam power plant operates on the reheat Rankine cycle. Steam enters the high-pressure turbine at 12.5 MPa and 5508C at a rate of 7.7 kg/s and leaves at 2 MPa. Steam is then reheated at constant pressure to 400 C before it expands in the low-pressure turbine. Steam leaves the condenser as a saturated liquid. The exit of the turbine is saturated at the condenser pressure (a) the condenser pressure, (b) the net power output, and (c) the thermal...
Steam power plant using the reheat Rankine cycle
A steam power plant operates using the reheat Rankine cycle. Steam enters the high pressure turbine at 12.5 MPa and 550ºC at a rate of 7.7 kg/s and leaves at 2MPa. Steam is then reheated at a constant pressure to 450ºC before it expands in the low pressure turbine. The isentropic efficiencies of the turbine and the pumpare 85% and 90%, respectively. Steam leaves the condenser as a saturated liquid. If the moisture content of the steam at the exit...
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...
Steam enters high-pressure turbine of a steam power plant that operates on ideal reheat Rankine cycle...
Steam enters high-pressure turbine of a steam power plant that operates on ideal reheat Rankine cycle at pressure and temperature of 5.5 MPa and 500°C, respectively. The steam leaves the high-pressure turbine as saturated vapor. The steam is then reheated to temperature of 400°C before it expands to a pressure of 7.5 kPa. Answer the following. i) Show the cycle on a T-s diagram with respect to saturation lines. ii) Determine the pressure at which reheating takes place. iii) Determine...
Problem 2/2 (50%) -The gas-turbine cycle of a combined gas-steam power plant has a pressure ratio...
Problem 2/2 (50%) -The gas-turbine cycle of a combined gas-steam power plant has a pressure ratio of 12. Air enters the compressor at 310 K and the turbine at 1400 K. The combustion gases leaving the gas turbine are used to heat the steam at 12.5 MPa to 500 C in a heat exchanger. The combustion gases leave the heat exchanger at 247"C. Steam expands in a high pressure turbine to a pressure of 2.5 MPa and is reheated in...
Steam enters the turbine of a simple vapor power plant with a pressure of 12 Mpa...
Steam enters the turbine of a simple vapor power plant with a pressure of 12 Mpa and a temperature of 600 ℃ and expands adiabatically to condenser pressure p. The isentropic efficiency of both the turbine and the pump is 84%. (a) For p = 30 kPa, determine the turbine exit quality and the cycle thermal efficiency.
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...
3. In a reheat cycle, steam leaves the boiler and enters the high-pressure turbine (HPT) at...
3. In a reheat cycle, steam leaves the boiler and enters the high-pressure turbine (HPT) at 6 MPa and 440 °C. After expansion in the high-pressure turbine to 500 kPa, the steam is reheated to 480 °C and then expanded in the low-pressure turbine (LPT) to 10 kPa. The end states of both the HPT and LPT fall in the liquid-vapor mixture region. Draw the cycle diagram and the T-s diagram, and determine the work done to the pump, total...
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...
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...
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...
Problem 2/2 (50%) -The gas-turbine cycle of a combined gas-steam power plant has a pressure ratio of 12. Air enters the compressor at 310 K and the turbine at 1400 K. The combustion gases leaving the gas turbine are used to heat the steam at 12.5 MPa to 500 C in a heat exchanger. The combustion gases leave the heat exchanger at 247"C. Steam expands in a high pressure turbine to a pressure of 2.5 MPa and is reheated in...
3. In a reheat cycle, steam leaves the boiler and enters the high-pressure turbine (HPT) at 6 MPa and 440 °C. After expansion in the high-pressure turbine to 500 kPa, the steam is reheated to 480 °C and then expanded in the low-pressure turbine (LPT) to 10 kPa. The end states of both the HPT and LPT fall in the liquid-vapor mixture region. Draw the cycle diagram and the T-s diagram, and determine the work done to the pump, total...
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...
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