2. What is the minimum power requirement of a pump that is to increase the pressure...
(2) Steam generated in a Rankine steam power cycle at a pressure of 8 MPa and temperature 600°C is fed to a turbine. Exhaust from the turbine enters a condenser at 100 kPa, where it is condensed to saturated liquid, which is then pumped to the boiler. (a) (20 pts.) What is the thermal efficiency n of an ideal Rankine cycle operating at these conditions? (b) (5 pts.) If the net power production of the cycle is 80,000 kW, what...
What is the energy requirement of an 85% efficient pump that transports 52L/s of water if the pressure increases from 200 kPa to 1292.5 kPa? (suppose there is no elevation change and diameter keeps the same) Select one: Can't be determined 66.84 kW 48.29 kW 425.13 kW
Liquid water at 120 kPa enters a 7 kW pump where its pressure is raised to 4.7 MPa. If the elevation difference between the exit and the inlet levels is 10 m, determine the highest mass flow rate of liquid water this pump can handle. Neglect the kinetic energy change of water, and take the specific volume of water to be 0.001 m3/kg The highest mass flow rate of liquid water is kg/s
In a reheat-cycle power plant, steam enters the high-pressure turbine at 5 MPa, 450°C, and expands to 0.5 MPa, after which it is reheated to 450°C. The steam is then expanded through the low-pressure turbine to 7.5 kPa. Liquid water (Vi 0.001 m/kg) leaves the condensor at 30°C, is pumped to 5 MPa, and returned to the steam generator. Each turbine is adiabatic, with an isentropic efficiency of 81.6 % and the pump efficiency is 848 %. If the total...
Steam generated in a Rankine steam power cycle at a pressure of 8 MPa and temperature 600oC is fed to a turbine. Exhaust from the turbine enters a condenser at 100 kPa, where it is condensed to saturated liquid, which is then pumped to the boiler. (a) (20 pts.) What is the thermal efficiency η of an ideal Rankine cycle operating at these conditions? (b) (5 pts.) If the net power production of the cycle is 80,000 kW, what is...
A 4-kW pump operating at steady state draws in liquid water at 100 kPa, 15?C with a mass flow rate of 4.5 kg/s and delivers water at 1 MPa pressure. Ignore the kinetic and potential energy changes from inlet to exit. Determine (a) the isentropic efficiency of the pump and (b) whether the power input rating is adequate
Determine the cycle Efficiency: 8.7 MPa 500°C 320,000 kg/h Boiler 80,000 kW High-pressure turbine Low-pressure turbine Generator Condenser 5 kPa 0.9 MPa 28.000 kg/h 2.3 MPa 28.000 kg/h 227,000 kg/h Condensate pump High pressure heater Intermediate- Deaerating open feed water heater Boiler feed Low pressure heater pump pressure heater Trap Arrangement of heaters in an Trap Booster Trap pump actual power plant utilizing regenerative FWHs 210°C 330 kPa 12.000 kg/h 75КРа Determine the cycle Efficiency: 8.7 MPa 500°C 320,000 kg/h...
Determine the cycle Efficiency: 8.7 MPa 500°C 320,000 kg/h Boiler 80,000 kW High-pressure turbine Low-pressure turbine Generator Condenser 5 kPa 0.9 MPa 28.000 kg/h 2.3 MPa 28.000 kg/h 227,000 kg/h Condensate pump High pressure heater Intermediate- Deaerating open feed water heater Boiler feed Low pressure heater pump pressure heater Trap Arrangement of heaters in an Trap Booster Trap pump actual power plant utilizing regenerative FWHs 210°C 330 kPa 12.000 kg/h 75КРа Determine the cycle Efficiency: 8.7 MPa 500°C 320,000 kg/h...
Water is the working fluid in an ideal regenerative Rankine cycle with one open feed water heater, Figure 2. Upstream of the high pressure turbine superheated vapour with a mass flow rate of 90 kg/s entres the first-stage turbine at a pressure of 14 MPa Each turbine stage has an isentropic efficiency of 90%. The temperature of the inlet vapour is 520°C. The steam expands through the first-stage turbine to a pressure of 0.9MPa where some of the steam is...
2. (50 pts.) Consider a steady-state, steady-flow, regenerative power cycle with one closed feedwater heater. The mass flow rate of water going through the steam generator is 8 kg/s. The figure and table below provide some of the data needed for solving this problem, eg. you do not need to look up enthalpies in the tables. Calculate (a) The extracted flow fraction "a (b) The total turbine power (kW) (c) The total pump power (kW) (d) The boiler heat transfer...