7.7 kg/s cold feedwater enters a 500kPa open feedwater heater (a mixing chamber) at 50oC. Bleed...
7.7 kg/s cold feedwater enters a 500kPa open feedwater heater (a mixing chamber) at 50oC. Bleed steam is available from the turbine at 500kPa and 250oC. At what rate must bleed steam be supplied to the open feedwater heater so the feedwater leaves this unit as a saturated liquid. Determine the mass flow rate in unit of kg/s.
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7.7 kg/s cold feedwater enters a 500kPa open feedwater heater (a
mixing chamber) at 50oC. Bleed...
SP-25 Consider a regenerative steam power plant with one open feedwater heater and one closed fee...
SP-25 Consider a regenerative steam power plant with one open feedwater heater and one closed feedwater heater. Superheated steam enters the turbine with a mass flow rate of 120 kg/s at 16 MPa and 560°C (State 1). Some fraction of the steam is extracted at 40 bar (State 2) and is supplied to the closed feedwater heater. The remaining steam expands to a pressure of 3 bar (State 3), another fraction is extracted at this pressure, and is supplied to...
In steam power plants, open feedwater heaters are frequently used to heat the feedwater bylon mixing...
In steam power plants, open feedwater heaters are frequently used to heat the feedwater bylon mixing it with steam bled off the turbine at an intermediate stage. Consider an feedwater heater that operates at a pressure of 1000 kPa. Feedwater at 50°C and 1000 kPa is to be heated by mixing it with superheated steam at 200°C and 1000 kPa. In an ideal feedwater heater, the mixture leaves the heater as saturated liquid at the feedwater pressure. Determine the ratio...
Liquid water at 20ºC, 100 kPa enters one inlet of an open-feedwater heater (a mixing chamber)...
Liquid water at 20ºC, 100 kPa enters one inlet of an open-feedwater heater (a mixing chamber) with a flowrate of 0.5 kg/s. Superheated vapor at 200ºC is added at the other inlet. Determine the mass flowrate (in kg/s) of water vapor that must be added to produce a liquid-vapor mixture with a quality of 75% at the exit.
Consider a reheat–regenerative vapor power cycle with two feedwater heaters, a closed feedwater heater and an...
Consider a reheat–regenerative vapor power cycle with two feedwater heaters, a closed feedwater heater and an open feedwater heater. Steam enters the first turbine at 12.0 MPa, 520C and expands to 0.6 MPa. The steam is reheated to 480C before entering the second turbine, where it expands to the condenser pressure of 0.006 MPa. Steam is extracted from the first turbine at 2 MPa and fed to the closed feedwater heater. Feedwater leaves the closed heater at 205C and 8.0...
In large steam power plants, the feedwater is frequently heated in a closed feedwater heater by...
In large steam power plants, the feedwater is frequently heated in a closed feedwater heater by using steam extracted from the turbine at some stage. Steam enters the feedwater heater at 1 MPa and 215°C and leaves as saturated liquid at the same pressure. Feedwater enters the heater at 2.5 MPa and 50°C and leaves at 10°C below the exit temperature of the steam. Determine the ratio of the mass flow rates of the extracted steam and the feedwater. The...
A power plant operates on a regenerative vapor power cycle with one open feedwater heater. Steam...
A power plant operates on a regenerative vapor power cycle with one open feedwater heater. Steam enters the first turbine stage at 12 MPa, 560°C and expands to 1 MPa, where some of the steam is extracted and diverted to the open feedwater heater operating at 1 MPa. The remaining steam expands through the second turbine stage to the condenser pressure of 6 kPa. Saturated liquid exits the open feedwater heater at 1 MPa. The net power output for the...
A power plant operates on a regenerative vapor power cycle with one open feedwater heater. Steam...
A power plant operates on a regenerative vapor power cycle with one open feedwater heater. Steam enters the first turbine stage at 12 MPa, 560°C and expands to 1 MPa, where some of the steam is extracted and diverted to the open feedwater heater operating at 1 MPa. The remaining steam expands through the second turbine stage to the condenser pressure of 28 kPa. Saturated liquid exits the open feedwater heater at 1 MPa. The net power output for the...
8.63 Data for a regenerative vapor power cycle using an open and a closed feedwater heater similar in design to that shown in Fig PS.60 are provided in the table below. Steam enters the hubine at...
8.63 Data for a regenerative vapor power cycle using an open and a closed feedwater heater similar in design to that shown in Fig PS.60 are provided in the table below. Steam enters the hubine at 14 MPa, 560 C, state 1, and expands isentropically in three stages to a condenser of80 kPa, state 4. Saturated liquid exiting the condenser at state 5 İs pumped isentropically to state 6 and enters the open feedwater heater. Between the first and second...
Consider a reheat-regenerative vapor power cycle with two feedwater heaters, a closed feedwater heater and an...
Consider a reheat-regenerative vapor power cycle with two feedwater heaters, a closed feedwater heater and an open feedwater heater. Steam enters the first turbine at 8.0 MPa, 500°C and expands to 0.8 MPa. The steam is reheated to 500°C before entering the second turbine, where it expands to the condenser pressure of 10 kPa. Steam is extracted from the first turbine at 2 MPa and fed to the closed feedwater heater. Feedwater leaves the closed heater at 200°C and 8.0...
An open feedwater heater operates at 7 bars. Compressed liquid water at 35°C enters at one Given: section, while su...
An open feedwater heater operates at 7 bars. Compressed liquid water at 35°C enters at one Given: section, while superheated vapor enters at another section. The fluids mix and leave the heater as a saturated liquid. Let To 20°Cand Po 1 bar and assume the feedwater heater is well insulated Find: a) The change in flow exergy (kJ/s) if the flow rate of compressed liquid is 72.8 kg/s and the mass flow rate of superheated vapor is 16.7 kg/s and...
SP-25 Consider a regenerative steam power plant with one open feedwater heater and one closed feedwater heater. Superheated steam enters the turbine with a mass flow rate of 120 kg/s at 16 MPa and 560°C (State 1). Some fraction of the steam is extracted at 40 bar (State 2) and is supplied to the closed feedwater heater. The remaining steam expands to a pressure of 3 bar (State 3), another fraction is extracted at this pressure, and is supplied to...
In steam power plants, open feedwater heaters are frequently used to heat the feedwater bylon mixing it with steam bled off the turbine at an intermediate stage. Consider an feedwater heater that operates at a pressure of 1000 kPa. Feedwater at 50°C and 1000 kPa is to be heated by mixing it with superheated steam at 200°C and 1000 kPa. In an ideal feedwater heater, the mixture leaves the heater as saturated liquid at the feedwater pressure. Determine the ratio...
A power plant operates on a regenerative vapor power cycle with one open feedwater heater. Steam enters the first turbine stage at 12 MPa, 560°C and expands to 1 MPa, where some of the steam is extracted and diverted to the open feedwater heater operating at 1 MPa. The remaining steam expands through the second turbine stage to the condenser pressure of 6 kPa. Saturated liquid exits the open feedwater heater at 1 MPa. The net power output for the...
8.63 Data for a regenerative vapor power cycle using an open and a closed feedwater heater similar in design to that shown in Fig PS.60 are provided in the table below. Steam enters the hubine at 14 MPa, 560 C, state 1, and expands isentropically in three stages to a condenser of80 kPa, state 4. Saturated liquid exiting the condenser at state 5 İs pumped isentropically to state 6 and enters the open feedwater heater. Between the first and second...
Consider a reheat-regenerative vapor power cycle with two feedwater heaters, a closed feedwater heater and an open feedwater heater. Steam enters the first turbine at 8.0 MPa, 500°C and expands to 0.8 MPa. The steam is reheated to 500°C before entering the second turbine, where it expands to the condenser pressure of 10 kPa. Steam is extracted from the first turbine at 2 MPa and fed to the closed feedwater heater. Feedwater leaves the closed heater at 200°C and 8.0...
An open feedwater heater operates at 7 bars. Compressed liquid water at 35°C enters at one Given: section, while superheated vapor enters at another section. The fluids mix and leave the heater as a saturated liquid. Let To 20°Cand Po 1 bar and assume the feedwater heater is well insulated Find: a) The change in flow exergy (kJ/s) if the flow rate of compressed liquid is 72.8 kg/s and the mass flow rate of superheated vapor is 16.7 kg/s and...
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