See the following picture: 10–78 Consider a cogeneration power plant modified with regeneration. Steam enters the turbine at 9 MPa and 400°C andexpands to a pressure of 1.6 MPa. At this pressure, 35 percent of the steam is extracted from the turbine, and the remainderexpands to 10 kPa. Part of the extracted steam is used to heat the feedwater in an open feedwater heater. The rest of the extractedsteam is used for process heating and leaves the process heater as a saturated liquid at 1.6 MPa. It is subsequently mixed with thefeedwater leaving the feedwater heater, and the mixture is pumped to the boiler pressure. Assuming the turbines and the pumpsto be isentropic, show the cycle on a T-s diagram with respect to saturation lines, and determine the mass flow rate of steamthrough the boiler for a net power output of 25 MW. Answer: 29.1 kg/s

Answered: Image /qna-images/answer/1df98e7d-7e1c-4bb8-b89e-491843fcc397.jpg

Answered: 10–78 Consider a cogeneration power…

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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Consider a 210-MW steam power plant that operates on a simple ideal Rankine cycle. Steam enters the turbine at 10 MPa and 500C and is cooled in the condenser at a pressure of 10 kPa. Assuming an isentropic efficiency of 85 percent for both the turbine and the pump, determine the actual quality (%) of the steam at the turbine exit. (Use 2 decimal places for the final answer.)
Consider a 210-MW steam power plant that operates on a simple ideal Rankine cycle. Steam enters the turbine at 10 MPa and 500C and is cooled in the condenser at a pressure of 10 kPa. Assuming an isentropic efficiency of 85 percent for both the turbine and the pump, determine the quality ofthe steam at the turbine exit, the thermal efficiency of the cycle, specific enthalpy (kJ/kg) at the condenser, and actual Qin (kJ/kg).
Consider a 210-MW steam power plant that operates on a simple ideal Rankine cycle. Steam enters the turbine at 10 MPa and 500C and is cooled in the condenser at a pressure of 10 kPa. Assuming an isentropic efficiency of 85 percent for both the turbine and the pump, determine the specific enthalpy (kJ/kg) at the condenser outlet. (Use 2 decimal places for the final answer.)
Consider a 210-MW steam power plant that operates on a simple ideal Rankine cycle. Steam enters the turbine at 10 MPa and 500C and is cooled in the condenser at a pressure of 10 kPa. Determine the quality of the steam (%) at the turbine exit. (Use 2 decimal places for the final answer.)
Consider a 175 MW steam power plant that operates on a simple ideal Rankine cycle. Steam enters the turbine at 10 MPa and 575°C and is cooled in the condenser at a pressure of 10 kPa. 1. Show the cycle on a T-s diagram with respect to saturation lines. Determine: 2. the quality of the steam at the turbine exit, 3. the thermal efficiency of the cycle, and 4. the mass flow rate of the steam.
A 600-MWe power plant has an efficiency of 36 % with 15% of the waste heat beingreleased to the atmosphere as stack heat and the other 85% taken away in the coolingwater. Instead of drawing water from a river, heating it, and returning it to the river, this plant uses an evaporative cooling tower wherein heat is released to the atmosphere as cooling water is vaporized. At what rate must 15 °C makeup water be provided from the river to offset the water lost in the cooling tower?
Consider a 210-MW steam power plant that operates on a simple ideal Rankine cycle. Steam enters the turbine at 10 MPa and 500C and is cooled in the condenser at a pressure of 10 kPa. Assuming an isentropic efficiency of 85 percent for both the turbine and the pump, determine the actual mass flow rate (kg/s) of the steam. (Use 2 decimal places for the final answer.)
Consider an 80 MW coal-fired steam power plant that runs on a reheat Rankine cycle. 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 10 kPa. Determine the mass flow rate of steam from the boiler. in metric tons per hour
(simple cycle)Consider a 210-MW steam power plant that operates on a simple ideal Rankine cycle. Steam enters the turbine at10 MPa and 500C and is cooled in the condenser at a pressure of 10 kPa. Show the cycle on a T-s diagram with respect to saturation lines and determine (a) the quality of the steam at the turbine exit, (b) the thermal efficiency of the cycle, and (c) the mass flow rate of the steam.
Consider a steam power plant operating on a simple Rankine cycle. Steam enters the turbine at 15 MPa and 650°C and is condensed in the condenser at a pressure of 15 kPa. Assuming an isentropic efficiency of 84% and 86% for the pump and turbine, respectively, determine the actual thermal efficiency (%). (Use 2 decimal places for the final answer.)
A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at 10°C by rejecting waste heat to cooling water that enters the condenser at 18°C at a rate of 0.25 kg/s and leaves at 26°C. The refrigerant enters the condenser at 1.2 MPa and 50°C and leaves at the same pressure subcooled by 5°C. If the compressor consumes 2.3 kW of power, determine the COP?
Consider a steam power plant that operates on a simple ideal Rankine cycle and has a net power output of 20MW. Steam enters the turbine at 7MPa and 450.210C and is cooled in the condenser at a pressure of 10kPa by running cooling water from a lake through the tubes of the condenser at a rate of 1750kg/s. Determine the value of enthalpy of steam at the entry to the steam turbine (accurate to 4 decimal places, using the relevant equations) assuming that the cp of superheated steam is 2.9699kJ/kg.K.

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