See photo below In a cogeneration plant, 10° kg/h of steam at 80 bar, 480 °C expands in theh.p. turbine to 10 bar. From the exhaust 4 x 10° kg/h of steam is extracted forprocess heating. The remaining steam expands in the 1.p. turbine to 0.08 bar.Saturated liquid at 0.08 bar leaving the condenser is pumped to 9.5 bar whereit mixes with the condensate from the process heater leaving at 9.5 bar,120°C. The entire flow is then pumped to 80 bar. The isentropic efficienciesof the turbines and the pumps are 86% and 80%, respectively. Determine (a)Copyrighted maAnalysis of Steam Cycles 101the heating load, in kJ/h, (b) the power developed by the turbines, in kW, and(c) the rate of heat transfer in the steam generator, in kJ/h.[Ans. (a) 9.53 kJ/h, (b) 236500 kW, (c) 3.032 × 10° kJ/h]

Answered: In a cogeneration plant, 10° kg/h of…

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

In an ideal Rankine cycle, steam is generated at 4.1 MPa and 480 deg. C. The condenser is at 32 deg. C. Determine: a. The cycle thermal efficiency b. For the engine with the same end states, the thermal efficiency and steam rate.
A binary-vapour cycle operates on mercury and steam. Saturated mercury vapour at 4.5 bar is suppliedto the mercury turbine, from which it exhaust at 0.04 bar. The mercury condenser generates saturatedsteam at 15 bar which is expanded in a steam turbine to 0.04 bar.(i) Find the overall efficiency of the cycle.(ii) If 50000 kg/h of steam flows through the steam turbine, what is the flow through the mercuryturbine ?(iii) Assuming that all processes are reversible, what is the useful work done in the binary vapour cyclefor the specified steam flow ?(iv) If the steam leaving the mercury condenser is superheated to a temperature of 300°C in a superheaterlocated in the mercury boiler, and if the internal efficiencies of the mercury and steam turbinesare 0.85 and 0.87 respectively, calculate the overall efficiency of the cycle. The properties ofsaturatedmercury are given below :
Steam is supplied to a two-stage turbine at 40 bar and 350 o It expands in the first turbine until it is just dry saturated, then it is reheated to 350 oC and expanded through the second stage turbine; the isentropic efficiencies of the first and second stage turbines are 84 % and 78 % respectively. The condenser pressure is 0.035 bar. Sketch the process on a T-s diagram and calculate; i. The work output and heat supplied per kg of steam for the plant assuming ideal processes ii. The thermal efficiency of the cycle iii. The specific steam consumption
2. Steam at 10MPaa, 550°C enters an ideal engine that has one stage of regenerative cycle; condenser pressure is 10 kPaa and extraction of steam is at 1 MPa.
in an ideal reheat cycle, the steam enters the turbine at 30 bar and 500°C after expansion to 5 bar, the steam is reheated to 500°Cand then expanded to the condenser pressure of 0.1 bar. Determine the cycle thermal efficiency, mass flow rate of steam. Take power output as 100 MW.
2. In a reheat cycle steam enters the high pressure turbine at 40 bar and 400°C. It expands isentropic ally to 6 bar and is reheated at constant pressure to 400°C. This steam is expanded isentropic ally in the low pressure turbine to the condenser pressure of 0.1 bar. Calculate the thermal efficiency and steam consumption for 10 MW output.
1. A 100-MW stean power plant operates on the Rankine cycle but with turbine and pump efficiencies of 85%. The steam enters the turbine at 7.0 MPa and 555°C. the cycle thermal It discharges to the condenser at 20 kPa. Determine and the cooling-water flow rate in the the steam flow rate, efficiency, condenser if cooling water enters at 20°C and leaves at 35°C. Draw the T-S diagram. I Steam generator Boundary 1' Turbine 77,-0.85 Condenser 4 3 Pump 7,-0.85 100 MW 1 35° C I Cooling water 20° C
In a Reheat Cycle steam enters the turbine @ 40 bar and 400 C. It expands isentropic ally to 6 bar and is reheated at constant pressure to 400 C. This steam expanded isentropic ally to 1 bar and is reheated at constant pressure to 200 C. Finally this steam is expanded isentropic ally in the condenser pressure of 0.1 bar. Determine the thermal efficiency and the capacity of the boiler if 10,000 KW of power output is required.
In a combined flash-binary geothermal power plant, saturated liquid at 230 C iswithdrawn from the production well at a rate of 220 kg/s and is flashed to a pressure of 500 kPa.The condenser pressure is 10 kPa. The liquid exiting the separator passes through a heat exchangerthat serves as the heat source in a binary cycle that uses isobutane. The geothermal liquid exits theheat exchanger at 90oC. Isobutane enters the turbine at 3.25 MPa and 145 C and leaves at 400 kPaand 80oC. Sketch the schematic and T-s diagrams. Also, determine the thermal efficiency of thecombined geothermal power plant.
In a steam plant 100 kg/min of dry-saturated steam at 30 bar enters the turbine. After expanding isentropic ally the exhaust steam enters the condenser. The condenser pressure is maintained at 0.1 bar by the cooling water taken from a nearby river. Calculate the following: a. Heat supplied to the boiler KJ/sec b. Heat rejected to the cooling water KJ/sec c. Efficiency of the plant and Net power output.
1. Determine the Rankine efficiency of a condensing steam turbine operating in a Rankine cycle as follows: Steam pressure - 200 psiaSteam temperature - 1000 FExhaust pressure - 2 in Hg absoluteSteam rate - 1.5 lb/kW-hr 2. If the no. 1 problem has a thermal efficiency of 30%, how many barrels of 30 °API fuel oil will be required to produce 1000 kW-hr of power. Neglect the pump work.
Q.8 In a regenerative steam cycle employing one open feed heater, the steam is supplied to the turbine as dry saturated at 40 bar, and exhausted to the condenser at 0.35 bar. The intermediate bleed pressure is 10 bar. Sketch the layout of the plant and show on the temp | entropy diagram the pressure under gone by the steam, neglecting the pump works, calculate: A. The mass of steam bled from the turbine per Kg of steam leaving the boiler. B. The thermal efficiency of the plant. C. The thermal efficiency of the plant without feed heating. D. The heat rate in (kJ/kW.hr) for the plant with and without feed heating.

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