Question

In: Mechanical Engineering

In an intermediate superheated steam cycle, water vapor is 4 MPa pressure, 440 oC high, isentropic...

In an intermediate superheated steam cycle, water vapor is 4 MPa pressure, 440 oC high, isentropic and 0.80 high
After entering the pressure turbine, it expands to 0.4 MPa and the intermediate superheater is again up to 440 oC.
it is heated and enters the low pressure turbine, whose isentropic efficiency is also 0.80. 40 oC from condenser
The fluid that works as a saturated liquid at temperature is pressed into the boiler with a pump with an isentropic efficiency of 0.90.
By accepting the entry of steam into the high pressure turbine as 1 point,
A) Show the cycle in the T-S diagram.
B) The degree of dryness of the steam at the outlet of the low pressure turbine
C) Thermal efficiency of the cycle
D) Calculate the second law efficiency of the cycle.

Solutions

Expert Solution


Related Solutions

In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa...
In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa and 480 °C, while the condenser pressure is 6 kPa. Steam expands through the first-stage turbine to 0.7 MPa and then is reheated to 480 °C a) Calculate the total heat addition, net work of the cycle, heat extraction through condenser, and thermal efficiency of this ideal Rankine cycle with reheat. [25] b) Calculate the same quantities assuming that the pump and each turbine...
In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa...
In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa and 480 °C, while the condenser pressure is 6 kPa. Steam expands through the first-stage turbine to 0.7 MPa and then is reheated to 480 °C a) For a pressure of 7 bar right after the first stage turbine in the ideal Rankine cycle, create two plots: thermal efficiency as a function of the reheat temperature from 200 °C to 500 °C; and the...
In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa...
In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa and 480 °C, while the condenser pressure is 6 kPa. Steam expands through the first-stage turbine to 0.7 MPa and then is reheated to 480 °C. Calculate the total heat addition, net work of the cycle, heat extraction through condenser, and thermal efficiency of this ideal Rankine cycle with reheat  
Superheated steam at 20 MPa, 640°C enters the turbine of a vapor power plant. The pressure...
Superheated steam at 20 MPa, 640°C enters the turbine of a vapor power plant. The pressure at the exit of the turbine is 0.5 bar, and liquid leaves the condenser at 0.4 bar at 75°C. The pressure is increased to 20.1 MPa across the pump. The turbine and pump have isentropic efficiencies of 81 and 85%, respectively. Cooling water enters the condenser at 20°C with a mass flow rate of 70.7 kg/s and exits the condenser at 38°C. For the...
Rankine cycle operates on boiler pressure 15 MPa and condenser pressure of 30 kPa. Superheated steam...
Rankine cycle operates on boiler pressure 15 MPa and condenser pressure of 30 kPa. Superheated steam enters the high-pressure turbine at 450°C. The high-pressure turbine expands the steam and enters the re-heater at 2.5 MPa. The steam is reheated until temperature reaches 450°C before being expanded in low-pressure turbine to condenser pressure of 30 kPa. Assume the isentropic efficiency of the low-pressure and high-pressure turbines are 94% and 89% respectively, and pump is working isentropically. Neglect the change in kinetic...
Superheated steam at 8 MPa and 480°C leaves the steam generator of a vapor power plant....
Superheated steam at 8 MPa and 480°C leaves the steam generator of a vapor power plant. Heat transfer and frictional effects in the line connecting the steam generator and the turbine reduce the pressure and temperature at the turbine inlet to 7.7 MPa and 440°C, respectively. The pressure at the exit of the turbine is 10 kPa, and the turbine operates adiabatically. Liquid leaves the condenser at 8 kPa, 36°C. The pressure is increased to 8.6 MPa across the pump....
Superheated steam at 8 MPa and 480°C leaves the steam generator of a vapor power plant....
Superheated steam at 8 MPa and 480°C leaves the steam generator of a vapor power plant. Heat transfer and frictional effects in the line connecting the steam generator and the turbine reduce the pressure and temperature at the turbine inlet to 7.3 MPa and 440°C, respectively. The pressure at the exit of the turbine is 10 kPa, and the turbine operates adiabatically. Liquid leaves the condenser at 8 kPa, 36°C. The pressure is increased to 8.6 MPa across the pump....
Superheated vapor enters the turbine at 10 MPa, 480°C, and the condenser pressure is 7.5 kPa...
Superheated vapor enters the turbine at 10 MPa, 480°C, and the condenser pressure is 7.5 kPa of a steam Rankine power cycle. Isentropic efficiencies of the turbine and pump are 84% and 73%, respectively. Determine for the cycle a. Sketch the cycle of a T-s diagram. Indicate the isobars with their values and the values for temperature and entropy. b. The heat transfer to the working fluid passing through the steam generator, in kJ per kg of steam flowing. c....
Superheated vapor enters the turbine at 10 MPa, 480°C, and the condenser pressure is 7.5 kPa...
Superheated vapor enters the turbine at 10 MPa, 480°C, and the condenser pressure is 7.5 kPa of a steam Rankine power cycle. Isentropic efficiencies of the turbine and pump are 84% and 73%, respectively. Determine for the cycle a. Sketch the cycle of a T-s diagram. Indicate the isobars with their values and the values for temperature and entropy. b. The heat transfer to the working fluid passing through the steam generator, in kJ per kg of steam flowing. c....
Superheated steam enters a turbine at 3 MPa, 550oC, and exits at 0.01 MPa. a) If...
Superheated steam enters a turbine at 3 MPa, 550oC, and exits at 0.01 MPa. a) If the process is reversible adiabatic (isentropic), find the final temperature (T2s), the final enthalpy (h2s) of the steam, and the turbine work (Wt,s). b) What is Sgen for the above process? c) If the isentropic efficiency is 90%, find the actual final temperature (T2a) and calculate Sgen? d) Plot process (a) and (c) on a Ts diagram.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT