Steam leaves a turbine at 250 kPa and 0.85 dryness fraction after isentropic expansion. The turbine inlet pressureis 3 MPa. A boiler feed-water pump extracts the moisture in the 250 kPa wet exhaust and returns it to the boiler,leaving only dry steam to enter a lower-pressure turbine. It expands isentropically in this turbine to 4 kPa, and asecond feed-water pump returns the condensate to the boiler. Ignoring the feed-water pump terms, calculate theideal-cycle efficiency.

Answered: Image /qna-images/answer/11c2cceb-a935-411b-8713-ee4261d78891.jpg

Answered: Steam leaves a turbine at 250 kPa and…

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

See similar textbooks

Similar questions

A geothermal power plant draws pressurized water from a well at 20 MPa and 300 C. To produce a steam-water mixture in the separator, where the unflashed water is removed, this water is throttled to a pressure of 1.5 MPa. The flashed steam which is dry and saturated passes through the steam collector and enters the turbine at 1.5 MPa and expands to 1 atm. The turbine efficiency is 85% at a rated power output of 10 MW. Calculate the overall plant efficiency.
Steam is supplied to a two-stage turbine at 40 bar and 350oC. It expands isentropic ally until it is just dry-saturated. Then it is reheated to 350oC at constant pressure and expanded in the second-stage turbine to the condenser pressure of 0.03 bar. If the isentropic efficiency of the second stage is 78%. Calculate the specific steam consumption and the thermal efficiency.
Steam enters the turbine of a cogeneration plant at 6 MPa and 550 degrees * C . One-third of the steam is extracted from the turbine at 1400 kPa pressure for process heating. The remaining steam continues to expand to 20 kPa. The extracted steam is then condensed and mixed with feedwater at constant pressure and the mixture is pumped to the boiler pressure of 6 MPaThe mass flow rate of steam through the boiler is 30 kg/s. Disregarding any pressure drops and heat losses in the piping, and assuming the turbine and the pump to be isentropic, determine (a) the net power produced(b) the utilization factor of the plant, (c) the exergy destruction associated with the process heating, and (d ) the entropy generation associated with the process in the boiler. Assuming a source temperature of 1000 K and a sink temperature of 298 K
Steam is expanded in the high pressure turbine from 4000kPa, 360°C to 1000kPa with an isentropic efficiency of 80%. The steam is then reheated isobarically to 360°C after which it passes through the low pressure turbine expanding down to 4kPa with an isentropic efficiency of 75%. If the condensate has a temperature of 24°C, calculate: (a). the condition of the steam entering the reheater (b). the condition of the steam entering the condenser (c). the total power output for a mass flow-rate of 10tonnes of steam per hour (d). the specific steam consumption in kg steam/kWh (e). the Rankine efficiency of the plant including the feed pump work
Steam is generated at 5.15 Mpa and 525C and condensation occurs at 0.127 Mpa. Considering that a Rankine cycle occurs between the same limits, determine the QA, QR, Wnet, cycle efficiency, engine efficiency and heat rate. What mass flow rate is required for a net output of 25000 kW?
The production well of a typical geothermal power plant is at 230°C saturated liquid and ground water flow rate of 230kg/s with separator pressure of 0.5MPaa while its condenser pressure is at 0.01MPa. the turbine and generator efficiencies are 83% and 87% , respectively. Sketch the T-s diagram of the system. Determine the amount of mass flowing into the reinjection well from the separator, generator output, heat rejection in the condenser and overall plant efficiency.
2. (#7ppVI-14Prm) - A steam plant operating with an initial pressure of 1.70 MPa and 370 C temperature and exhaust to a heating system at 0.17 MPa. The condensate from the heating system is returned to the boiler at 65.5 C and the heating system utilizes from its intended purpose 90% of the energy transferred from the steam it receives. The turbine efficiency is 70 %. If the boiler efficiency is 80 %, what is the cogeneration efficiency of the system in percent. Neglect pumpwork. Steam Properties: At 1.7 MPa and 370 ☐ C h = 3187.1 kJ/kg At 1.7 MPa he 483.20 kJ/kg s = 7.1081 kJ/kg At 65 C h₁ = 274.14 kJ/kg hfg = 2216.0 kJ/kg SĘ = 1.4752 kJ/kg Sfg = 5.7062 kJ/kg-K
Steam is delivered to turbine at 5.4 MPa and 600 degree C. Before condensation at 31 degree C, steam is extracted for feed water heating at 0.6 MPa. The turbine exhaust is 60 degree C. the required values of some state point properties are tabulated below. 9. Calculate the total pump work of the cycle
The pressure of the steam going into the turbine of the power plant is 4 MPa and the temperature is 600 degrees celsius. In the turbine, reheating is done at a pressure of 400 kPa, which raises the temperature to 400 degrees. The condensing pressure is 10 kPa. Determine the power of the turbine if the mass flow is 12 kg/s. What is the efficiency of the cycle? How to draw the cycle to Ts-diagram?
TNB steam power plant in Genting Highlandsoperates on reheat Rankine cycleand has power net output of 50MW. Steam enters the turbine at aMPa and b °Cand it is cooled in the condenser at a pressure of ckPa by running cooling water from the Bertam River through the tubesof condenser. Steam enters both stages of the turbine at b°C. If the moisture content of the steam at the exit of the low-pressure turbine is not to exceed 10 percent, show the cycle on a T-s diagram and determine;i.The pressure at which reheating takes place, ii.The thermal efficiency of the cycleandiii.Please justify how does the thermal efficiency of the cycle if the temperature to low turbine is increase to 600°C? a=12 b=500 c=12
Steam is supplied to a turbine at a pressure of 5,000 KPa and a temperature of 500 C. Steam is bled for feed heating at pressures of 2000 KPa and 500 kPa. The condenser pressure is 50 KPa. The stage efficiency of each section of the turbine can be taken as 82%. In the feed heaters the feedwater has its liquid enthalpy raised to that of the corresponding bled steam. The bled steam is condensed but not undercooled and, in this state, on leaving the feed heater. is pumped into the feed main as it leaves the feed heater Using a Mollier chart, determine Note: Use the Mollier Chart to answer the question Complete the calculations using 4 significant figures The mass of steam bled to each feed heater in kg/kg of supply steam 0.017 O kg/kg supply steam m2 = 0,0106 O kg/kg supply steam
TNB steam power plant in Genting Highlandsoperates on reheat Rankine cycleand has power net output of 50MW. Steam enters the turbine at 12MPa and 500 °C and it is cooled in the condenser at a pressure of 12kPa by running cooling water from the Bertam River through the tubesof condenser. Steam enters both stages of the turbine at b°C. If the moisture content of the steam at the exit of the low-pressure turbine is not to exceed 10 percent, show the cycle on a T-s diagram and determine;i.The pressure at which reheating takes place, ii.The thermal efficiency of the cycleandiii.Please justify how does the thermal efficiency of the cycle if the temperature to low turbine is increase to 600°C?

SEE MORE QUESTIONS

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS