gas turbine - aast-notes.weebly.com · slide nr. 10 of 15 slides actual cycle without pressure...
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Slide Nr. 1 of 15 Slides
Gas Turbine
Mon 8:42:26 PM
Chapter 4:
Gas Turbine
Dr. Eng. Sameh Shaaban
21 December 2009
Slide Nr. 2 of 15 Slides
Gas Turbine
Mon 8:52:36 PM
Chapter 4:
Gas Turbine
Dr. Eng. Sameh Shaaban
21 December 2009
Slide Nr. 3 of 15 Slides
Jet Engine
Mon 10:37:11 PM
Chapter 4:
Gas Turbine
Dr. Eng. Sameh Shaaban
21 December 2009
Slide Nr. 4 of 15 Slides
BRAYTON CYCLE
Tue 12:28:04 AM
Chapter 4:
Gas Turbine
Dr. Eng. Sameh Shaaban
21 December 2009
Slide Nr. 5 of 15 Slides
BRAYTON CYCLE
Tue 12:28:04 AM
Chapter 4:
Gas Turbine
Dr. Eng. Sameh Shaaban
21 December 2009
Slide Nr. 6 of 15 Slides
BRAYTON CYCLE
Tue 12:28:04 AM
Chapter 4:
Gas Turbine
Dr. Eng. Sameh Shaaban
21 December 2009
Slide Nr. 7 of 15 Slides
BRAYTON CYCLE
Tue 12:28:04 AM
Chapter 4:
Gas Turbine
Dr. Eng. Sameh Shaaban
21 December 2009
Slide Nr. 8 of 15 Slides
BRAYTON CYCLE
Tue 12:28:04 AM
Chapter 4:
Gas Turbine
Dr. Eng. Sameh Shaaban
21 December 2009
Slide Nr. 9 of 15 Slides
BRAYTON CYCLE
Tue 12:28:04 AM
( ) ( )
( ) ( )
WWW
r1TcTT1TcTTcW
1rTc1TTTcTTcW
CTnet
1
p3p343p43pT
1
p1p121p12pC
−=
−=−=−=
−=−=−=
κ
−κ−
κ
−κ
Chapter 4:
Gas Turbine
Dr. Eng. Sameh Shaaban
21 December 2009
0r
W
p
net =∂
∂
( ) ( )12
min
max12
1
3opt,p
T
T
T
Tr
−κ
κ
−κ
κ
=
=
Slide Nr. 10 of 15 Slides
Actual Cycle without Pressure Losses
Tue 12:28:04 AM
Chapter 4:
Gas Turbine
Dr. Eng. Sameh Shaaban
21 December 2009
is,43
43T
12
1is,2
CTT
TT
TT
TT
−
−=η
−
−=η
Firing temperature Tf = T3
Ambient temperature Tamb = T1
( ) ( )43pT12pC TTcwTTcw −=−=
CTnet www −=
Slide Nr. 11 of 15 Slides
Actual Cycle without Pressure Losses
Tue 12:28:04 AM
Chapter 4:
Gas Turbine
Dr. Eng. Sameh Shaaban
21 December 2009
add
net
q
wEfficiencyThermal =η
CTnet www −= ( )23padd TTcq −=
T
net
w
wRatioWork =
Slide Nr. 12 of 15 Slides
Actual Cycle without Pressure Losses
Tue 12:28:04 AM
Chapter 4:
Gas Turbine
Dr. Eng. Sameh Shaaban
21 December 2009
( )
( ) ( )
−
η
−−−
η−η
=ηκ−κκ−κ
κ−κ
1p
C
1p
ambambf
C
1pamb
fT
cycler
11
1rTTT
rTT
Overall cycle efficiency as a function of the firing temperature and pressure ratio (based on a compressor efficiency 87% and turbine efficiency 92%).
Slide Nr. 13 of 15 Slides
Actual Cycle without Pressure Losses
Tue 12:28:04 AM
Chapter 4:
Gas Turbine
Dr. Eng. Sameh Shaaban
21 December 2009
Slide Nr. 14 of 15 Slides
The Use of Power Turbine
Tue 12:28:04 AM
PTnet ww =
( )23padd TTcq −=
net
w
wRatioWork =
Chapter 4:
Gas Turbine
Dr. Eng. Sameh Shaaban
21 December 2009
add
net
q
wEfficiencyThermal =η
TwRatioWork =
T-s ????