11- Consider a steam power plant that operates on the ideal regenerative Rankine cycle with a closed feedwater heater as shown in the figure. The plant maintains the turbine inlet at 3000 kPa and 350°C and operates the condenser at 20 kPa. Steam is extracted at 1000 kPa to serve the closed feedwater heater, which discharges into the condenser after being throttled to condenser pressure. Calculate the work produced by the turbine, the work consumed by the pump, and the heat supply in the boiler for this cycle per unit of boiler flow rate. Answers: 741 kJ/kg, 3.0 kJ/kg, 2353 kJ/kg Turbine Boiler 1-6 Closed FWH 8 Condenser Pump

11- Consider a steam power plant that operates on the ideal regenerative Rankine cycle with a closed feedwater heater as shown in the figure. The plant maintains the turbine inlet at 3000 kPa and 350°C and operates the condenser at 20 kPa. Steam is extracted at 1000 kPa to serve the closed feedwater heater, which discharges into the condenser after being throttled to condenser pressure. Calculate the work produced by the turbine, the work consumed by the pump, and the heat supply in the boiler for this cycle per unit of boiler flow rate. Answers: 741 kJ/kg, 3.0 kJ/kg, 2353 kJ/kg Turbine Boiler 1-6 Closed FWH 8 Condenser Pump

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Q1) Consider a steam power plant that operates on the ideal regenerative Rankine cycle with a closed feedwater heater as shown in the figure. The plant maintains the turbine inlet at 3 MPa and 350°C, and operates the condenser at 20 kPa Steam is extracted at 1 MPa to serve the closed feedwater heater, which discharges into the condenser after being throttled to condenser pressure, note that during throttling process the enthalpy remain constant. Calculate the work produced by the turbine, the work consumed by the pump, and the heat supply in the boiler for this cycle per unit of boiler flow rate. Take: hl=251.42 kJ/kg, vi 0.001017m³ /kg. h4-3116.1 kJ/kg s4= 6.7450kJ/kg.k Boiler Impa 3 Closed fwh 7 2 зара 3500 Turbine 5 8 Pump 1 очокра Condenser
Consider a steam power plant, which can be modeled using the ideal reheat Rankine cycle. The steam entering the high- pressure turbine is at 6 MPa and 400 degrees C and leaves at 2 MPa. The steam is then reheated to 400 C at constant pressure, before it expands to 20 kPa in the low-pressure turbine. Calculate: (a) the turbine work output in kJ/kg (b) the thermal efficiency of the cycle
B- Consider a steam power plant operating on the simple ideal Rankine cycle. Steam enters the turbine at 3 MPa and 350 °C and is condensed in the condenser at a pressure of 75 kPa. Determine the thermal efficiency of this cycle.
This is an Open feedwater not a closed feedwater thank you
4. Consider a simple ideal Rankine cycle. The pressure of the boiler and the condenser are 3 Mpa and 10 kPa respectively. The temperature of the steam entering the turbine is 350°C, and the quality of mixture leaving the turbine is 0.8. Calculate the back work ratio, in %. 0.4% - 0.5% · 0.3 % - 0.6%
Consider a 210-MW steam power plant that operates on a simple ideal Rankine cycle. Steam enters the turbine at 10 MPa and 500°C and is cooled in the condenser at a pressure of 7.5 kPa. Show the cycle on a T-s diagram with respect to saturation lines.
A simple ideal Rankine cycle with water as the working fluid operates between the pressure limits of 10 MPa in Boiler the boiler and 10 kPa in the condenser and a turbine inlet temperature of 500°C. The boiler is sized to provide a steam flow of 165 kg/s. Determine: (a)(s) the quality of the steam at the turbine exit, (b) the thermal efficiency of the cycle, and (c) 2) the net power produced by the cycle Wa Condesser Turbine
Please show the solution. Thank you very mmuch
Scenario (1) The first steam power plant operates on an ideal reheat Rankine cycle. Steam enters the first turbine at 8 MPa and 500 C and leaves at 3 MPa. Steam is then reheated at a constant pressure to 500 C before it expands to 20 kPa in the low-pressure turbine. Assuming that heat is being added to the boiler from a high temperature source at 1800 K and the condenser is transferring heat to a temperature sink at 300 K. Task 1 Investigate the effect of changing pump efficiency on the overall thermal efficiency of the thermodynamics cycle (Hint: You will assume different values for the isentropic pump efficiency such as: 70%, 80%, 90%, 95%, and 100%, then observe how it will change the thermal efficiency of the cycle). Representing the results in a plot is recommended.
Scenario (1) The first steam power plant operates on an ideal reheat Rankine cycle. Steam enters the first turbine at 8 MPa and 500 C and leaves at 3 MPa. Steam is then reheated at a constant pressure to 500 C before it expands to 20 kPa in the low-pressure turbine. Assuming that heat is being added to the boiler from a high temperature source at 1800 K and the condenser is transferring heat to a temperature sink at 300 K. Task 1 Investigate the effect of changing turbine efficiency on the overall thermal efficiency of the thermodynamic cycle. (Hint: You will assume different values for the isentropic turbine efficiency such as: 70%, 80%, 90%, 95%, and 100%, then observe how it will change the thermal efficiency of the cycle). Representing the results in a plot is recommended.
Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Consider a steam power plant that operates on a reheat Rankine cycle and has a net power output of 80 MW. Steam enters the high-pressure turbine at 10 MPa and 500°C and the low-pressure turbine at 1 MPa and 500°C. Steam leaves the condenser as a saturated liquid at a pressure of 10 kPa. The isentropic efficiency of the turbine is 72 percent and that of the pump is 95 percent. Determine the quality (or temperature, if superheated) of the steam at the turbine exit. Use steam tables. (You must provide an answer before moving on to the next part.) The temperature of the steam at the turbine exit is °C.
A simple Rankine cycle uses water as the working fluid. The boiler operates at 6400 kPa and the condenser at 70 kPa. At the entrance to the turbine, the temperature is 490 °C. The isentropic efficiency of the turbine is 84 %, pressure and pump losses are negligible, and the water leaving the condenser is subcooled by 6.7 °C. The boiler is sized for a mass flow rate of 18 kg/s. Determine the following values. (1) The temperature at the pump inlet. / 80.3 (2) The specific volume at the pump inlet. (3) The specific enthalpy at the turbine exit. X 346 (4) The rate at which heat is added in the boiler. (5) The power required to operate the pumps. (6) The net power produced by the cycle. (7) The thermal efficiency. o °C O m/kg O kJ/kg O kW O kW O kW 0.001030