Question: Please calculate with values.Power plant steady operations: Under normal operation, the turbine exhaust of a gas turbine power cycle is very hot and therefore contains
Please calculate with values.Power plant steady operations: Under normal operation, the turbine exhaust of a gas turbine power cycle is very hot and therefore contains a significant amount of exergy. One scheme that utilizes this exergy is called a combined cycle, as shown in Figure below. In a combined cycle, the hot exhaust from the gas turbine is used to boil steam in an interstage heat exchanger. The heat exchanger serves as a boiler for a vapor power cycle. Consider a combined cycle power plant that has a net power delivery of
MW
Air enters the compressor of the gas turbine cycle at
bar
deg C
The compressor has a pressure ratio of
and an isentropic efficiency of
After heat addition in the combustor, the air enters the gas turbine at
deg C with no appreciable pressure drop through the combustor. The air then expands through the gas turbine, which has an isentropic efficiency of
and leaves the turbine at a pressure of
bar The hot air passes through the interstage heat exchanger and leaves at
bar
deg C
In the steam cycle, steam enters the turbine at
bar
deg C
The steam expands through the steam turbine, which has an isentropic efficiency of
to the condenser pressure,
bar The condenser fully condenses the steam to a saturated liquid condition at
bar The exhaust of the pump, which has an isentropic efficiency of
is
bar The condenser is cooled with liquid water that enters at
deg C and exits at
deg C
The analysis needs to be implemented from both entire system and individual equipment,
The analysis needs to be investigated from energy quantity, quality and entropy points of views,
The opportunities need to be identified based on your analysis for the improvement of the performance.The sketch of the system and where possible the thermodynamics diagrams are required to be included in your analysis
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