1) A Rankine cycle with reheat uses 1 kg s-1 of steam though the primary turbine,...
1) A Rankine cycle with reheat uses 1 kg s-1 of steam though the primary turbine, whose inlet conditions are 400C and 50 Bar. The primary turbine has an isentropic efficiency of 80% and an outlet pressure of 10 Bar. After this turbine, all of the steam is reheated to 400C and passed through a reheat turbine which also has an isentropic efficiency of 80% and whose outlet pressure is 1 bar, which is the condenser pressure. After the condenser, the steam is a saturated liquid. It is then compressed in a feed pump (whose isentropic efficiency coincidently is 65%) where it exits at 50 bar. Heat is then added to the steam to raise its temperature to that of the primary turbine
a) Draw the block and T-s diagram for the system.
b) How much power does the HP turbine produce? How much power does the LP turbine produce? How much power does the feed pump need? What is the net power output?
c) How much heat is required for the primary heat input, the reheat?
d) What is the thermal efficiency of the cycle?
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1) A Rankine cycle with reheat uses 1 kg s-1 of steam though the
primary turbine,...
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 steam power plant operates on the reheat Rankine cycle. Steam enters the high-pressure turbine at...
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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...
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 500°C and the low-pressure turbine at 1 MPa and 500°C. Steam leaves the condenser as a saturated liquid at a pressure of 10 kPa. The isentropic efficiency of the turbine is 74 percent and that of the pump is 95 percent. Determine the quality (or temperature, if superheated) of the...
Example: Consider a steam power plant operating on the ideal reheat Rankine cycle. Steam enters the...
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A steam power plant is based on the Rankine cycle with reheat (refer to the figure below). Steam is produced by the boiler/superheater (H-1) at 100 bar and 600 C at a rate of 2.5 kgs. This is expanded to 10 bar in the turbine T-1 and then reheated to 600 °C in heater H-2. The steam is then expanded in turbine T-2 to a pressure of 0.1 bar. The steam is then condensed in condenser (C-1) which operates at...
A steam plant operates on a reheat Rankine cycle and has a net power output of 80MW. Steam enters the high pressure turbine at 10 MPa and 500 °C and the low pressure turbine at 1 MPa and 500 °C. Steam leaves the condenser as a saturated liquid at a pressure of 10kPa. The efficiency of the turbine is 80% and the efficiency of the pump is 95%. Determine the thermal efficiency of the cycle. Rankine Cycle with Reheat
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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temperature is 1,742 ° F. The pressure ratio in the compressor is
7. The isentropic efficiency of both the compressor and the turbine
is 80%. Gas exits the heat...
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