A steam power plant operates on an ideal regenerative Rankine cycle. Steam enters the turbine at 6 MPa and 600 °C and is condensed in the condenser at 20 kPa. Steam is extracted from the turbine at 2 MPa and 0.8 MPa to heat water in open feed water heaters. Water leaves the feed water heaters as a saturated liquid. Sketch the plant and show the cycle on a T-s diagram, and determine: (a) the net work output per kg of steam flowing through the boiler, kJ/kg (b) the thermal efficiency of the cycle (c) the specific steam consumption, kg/kW.hr

A steam power plant operates on an ideal regenerative Rankine cycle. Steam enters the turbine at 6 MPa and 600 °C and is condensed in the condenser at 20 kPa. Steam is extracted from the turbine at 2 MPa and 0.8 MPa to heat water in open feed water heaters. Water leaves the feed water heaters as a saturated liquid. Sketch the plant and show the cycle on a T-s diagram, and determine: (a) the net work output per kg of steam flowing through the boiler, kJ/kg (b) the thermal efficiency of the cycle (c) the specific steam consumption, kg/kW.hr

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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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%
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
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A simple steam power plant uses water as the working fluid and operates on the simple ideal Rankine cycle. The boiler operates at 15000 kPa and the condenser at 30 kPa. Show the cycle on a T-s diagram with respect to saturation lines and determine the phase change in each state, the minimum temperature required at the turbine inlet such that the mixture at the exit of the turbine is not lower than 80 percent and the thermal efficiency of the cycle
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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.
B1
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