In a Rankine cycle we can use the steam exiting the turbine to heat the steam leaving the pump, just as we would for a Brayton cycleQuestion 7Select one:a.TRUEb.FALSE
Question
In a Rankine cycle we can use the steam exiting the turbine to heat the steam leaving the pump, just as we would for a Brayton cycleQuestion 7Select one:a.TRUEb.FALSE
Solution
b. FALSE
In a Rankine cycle, the steam exiting the turbine is condensed and then pumped back into the boiler. The steam leaving the pump is not heated by the steam exiting the turbine, but by the boiler. This is different from a Brayton cycle, where the exhaust gases from the turbine are used to preheat the air entering the combustion chamber. Therefore, the statement is false.
Similar Questions
When a simple Rankine cycle is modified to include reheating for the same mass flowQuestion 1Select one:a.the pump work remains the same, the heat supplied is increased, the heat rejected is increased, the total turbine work increases, and the quality of steam leaving the turbine decreasesb.the pump work remains the same, the heat supplied is increased, the heat rejected stays the same, the total turbine work increases, and the quality of steam leaving the turbine decreasesc.the pump work remains the same, the heat supplied is increased, the heat rejected is increased, the total turbine work increases, and the quality of steam leaving the turbine increasesd.the pump work remains the same, the heat supplied remains the same, the heat rejected is increased, the total turbine work increases, and the quality of steam leaving the turbine increasese.the pump work remains the same, the heat supplied remains increases, the heat rejected stays the same, the total turbine work increases, and the quality of steam leaving the turbine increases
A simple ideal Rankine cycle operates between the pressure limits of 10 kPa and 4 MPa, with a turbine inlet temperature of 500C. The mass fraction of steam that condenses at the turbine exit isQuestion 1Select one:a.14%b.0%c.92%d.86%e.8%
Q2. Consider an ideal Rankine cycle where the boiler operates at 12.5 MPa and thecondenser operates at 40 kPa. The steam is superheated after the boiler to 600 oC. Theturbine produces 100 MW of shaft work. Determine:a) The mass flow rate of water through the turbine (in kg/s).b) The work required for the pump.Q3. For the process in Q2. Determine:a) The heat input into the boiler (in MW).b) The heat out for the condenser (in MW)c) The thermal efficiency of the cycle (in %).
A steam plant operates on the Rankine Cycle. The boiler pressure is 70bar andcondenser pressure 0.5bar. The steam enters the turbine at 500°C
For a simple ideal Rankine cycle, which uses water as the working fluid, the work produced by the turbine is 962.37 kJ/kg and heat supplied in the boiler is 2,568.32 kJ/kg . The condenser operates at 8 kPa and its boiler operates at 8,614 kPa. Use v1 = 0.001008 m3/kg in your calculations.Note: v-specific volumeAssumptions:Steady operating conditionKinetic and potential energy changes are negligible.Determine the thermal efficiency in % of this Rankine cycle when steam enters the turbine without any super-heating.
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