Thermodynamics Lecture 22: Isentropic Efficiency

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Thermodynamics Lecture 22: 0:04:26

Thermodynamics Lecture 22: Isentropic Efficiency

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Teacher spent an hour and I was confused. You spent 5 minutes and saved my grade. Thanks.

BlessingMakwera
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In an open cycle gas turbine plant, air enters the compressor at 1 bar and 290 K. The pressure at the exit of compressor is 5 bar. The isentropic efficiencies of the turbine and the compressor are 90% and 85%, respectively. Air fuel ratio is 60:1. The calorific value of the fuel used is 42 MJ/kg and mass flow rate of air is 2 kg/s. Assume air as an ideal gas with specific heat at constant pressure equal to 1.005 kJ/kgK and the specific heat ratio as 1.4. Consider specific heat at constant pressure for fuel also as 1.005 kJ/kgK and specific heat ratio is 1.4. Find the following:
1). Heat supplied by fuel to the plant in kJ/s is
a) 1300
b) 1400
c) 1000
d) 900
2). Work required to drive the Compressor in kW is
a) 400
b) 309
c) 595
d) 658
3). Actual turbine outlet temperature in Kelvin is
a) 672
b) 792
c) 710
d) 590
4). Thermal efficiency of the plant in percentage is
a) 21
b) 29
c) 19
d) 39

KnowledgeTricky
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Great explanation with great clarity :)

ramyusic
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Are you unable to calculate the formulas? I understand- you have them mesmerized, but can you show how to use them?

f_your_face
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my major is nuclear engineering and i should study by this

petrussegetmena
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Hey man, i have a question. Are 2 and 2s in the same phase?

brucewayne