Mechanical EngineeringThermodynamicsTopic: Brayton Cycles A power plant working on an ideal Brayton cycle with two stages of compression and twostages of expansion has an overall pressure ratio of 11. Air enters each stage of thecompressor at 310 K and each stage of the turbine at 1260 K and a regenerator with aneffectiveness of 70% effectiveness is used. Utilising the air standard assumptions andaccounting for the variation of specific heats with temperature:(a) Determine the specific enthalpies at each stage in the cycle.(b) Calculate the total work input at the compressors.(c) Calculate the total work output at the turbines.(d) Calculate the total heat supplied during the cycle.(e) Calculate the thermal efficiency.(f) Determine the mass flow rate of air needed to develop a net power output of 110 MW.(Ans: 254.14 kJ/kg; 751.24 kJ/kg; 911.93 kJ/kg; 54.5%; 221.3 kg/s)

Fig :TS diagram The overall pressure ratio is 11 Pressure ratiorp rp=11=3.3167 T1=T3=310…

Answered: Brayton Cycles

Engineering

Mechanical Engineering

Brayton Cycles

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Question

Mechanical Engineering
Thermodynamics
Topic: Brayton Cycles

A power plant working on an ideal Brayton cycle with two stages of compression and two
stages of expansion has an overall pressure ratio of 11. Air enters each stage of the
compressor at 310 K and each stage of the turbine at 1260 K and a regenerator with an
effectiveness of 70% effectiveness is used. Utilising the air standard assumptions and
accounting for the variation of specific heats with temperature:
(a) Determine the specific enthalpies at each stage in the cycle.
(b) Calculate the total work input at the compressors.
(c) Calculate the total work output at the turbines.
(d) Calculate the total heat supplied during the cycle.
(e) Calculate the thermal efficiency.
(f) Determine the mass flow rate of air needed to develop a net power output of 110 MW.
(Ans: 254.14 kJ/kg; 751.24 kJ/kg; 911.93 kJ/kg; 54.5%; 221.3 kg/s)

Science that deals with the amount of energy transferred from one equilibrium state to another equilibrium state.

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