Analysis of TTGh Inlet Air Cooling Techniques Applied to Brazilian Sites 2012

7/25/2019 Analysis of TTGh Inlet Air Cooling Techniques Applied to Brazilian Sites 2012

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LIST OF SYMBOLS AND NOMENCLATURE

Abbreviations

ISO International Organization for Standardization

TIT Turbine Inlet Temperature

TIC Turbine Inlet Cooling

Symbols Units

Cp

[kJ/kgC]

COP

[-]

LHV [kJ/kg]

h [kJ/kg]

HR Heat rate

m

P [Pa]

P [Pa]

Q

[kW]

r [-]

T Temperature [C]

Tb [C]

Tw Wet-bulb temperature [C]

W

Power output [MW]

SFC

doi: 10.5028/jatm.2012.04032012

Analysis of Gas Turbine Performance with Inlet Air Cooling

Techniques Applied to Brazilian Sites

Ana Paula Santos1, Cludia R. Andrade2,*1

2

Abstract:Frrph r whr pwrm hh r pr rr h

wrmmh rb r h p r r p r-

r h pwrp b h rb r hhrm wr h

mprr mprr r rb h pr p r -m-w

mb mh h p m r rprpr h mprr h r h

r r hhrrm wr h mr r C h rb

pwrp h r mh r b rr mprr rmprr Thr r

w b m rr b r Th r m - m h pr

pr r m h pr wr r h rb rmprrTh mmp w w h r mh mpr brp h mh

h mmw hrh h hr h rm h rmh r h

pr hrmm rb prrm rr h r pwr

p hrm r rmprr r hm Th r b

whh m r mpr whh h wh hr m -C Th h

hr h r mp mpm rr mprr

r hm h rb w rr mh rw r

mpr bw hrm mh brp hw h h brp hrpr h

hh rm r r whwr r O h hrh pr r

r h w r b wh m p

Keywords: rb Trb TC pr Chrbrp

J. Aerosp. Technol. Manag., So Jos dos Campos, Vol.4, No 3, pp. 341-353, Jul.-Sep., 2012 341


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[-]

[-]

[-]

[-]

[kgwater

/kgair

]

Subscripts

0

a

a

C

MC

CL Cooling load

g in Input

N Net

Turbine

T Total

h

w water

INTRODUCTION

-

-

-

Jaber a

-

-

and

J. Aerosp. Technol. Manag., So Jos dos Campos, Vol.4, No 3, pp. 341-353, Jul.-Sep., 2012342


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GAS TURBINE CYCLE

-

Net.W

0

06

050403

TurbineCompressor

Air ambient

CombusonChamber

P P0 03=

P04

P r P04 03$=

-

T04

P

PT

TT1

c

04

03

03

04

1

03h

= - +c

c-

c m= G

W m C T T ,C a pa avg 04 03$= -o o ^ h

ma C

pa

ag

-

P05

P P PCombustor05 04 D= -

Q m C T T ,in a pg avg 05 04$ $= -o o ^ h

Cpg

ag

LHV

/m

Q LHV f

Combustor

in

h=o o

Cmbr

/T T T

P P1

1t06 0 5 04

05 06

1

$h= - - c

c-

c m= G

P



4/13

W m C T T ,t T pg avg 05 06$= -o o ^ h

mT

m m mT a f= +o o o

and Cpg

ag

W W WN T C= -o o o

SFCW

m3600

N

f$

=o

o

HR SFC LHV$=

SFC LHV

3600th

$

h =

INLET AIR COOLING SYSTEMS

-

Net

.W

01

02

0

06

050403

Compor

Cooingym

Evaporative cooling

Coolingmedia

Air cooledAmbient Air

T Tb Tb Tw03 02 02 02f= - -^ h

m mw a 02 03$ ~ ~= -o o ^ h



5/13

ma

02

03

-

Q m C T T ,CL a pa avg 02 03$ $

= -o

o ^ h

ma C

paag

Absorption and mechanical chiller systems

-

tion cooling.

Ambient air

Chilled water

Air cooled to

gas turbine inlet

a

Q m h h h ,CL a w02 03 03 02 03$ $ ~ ~= - - -o o ^ ^h h6 @

h02

and h03

m mw a 02 03$ ~ ~= -o o ^ h

-

a

-

a

-

-

WCOP

QMC

CL=o o

-

W W W W N t C MC= - -o o o o



6/13

-

a a

100% RH

60% RH

40% RH

20% RH

10% RH

Inlet Chilling

Process

Enthalpy

Btu Per Pound

of Dry Air

Evaporative

Cooling Process

Specific

Humidity

Dry Bulb Temperature

40

35

30

25

20

15

4 16 27 38 49.000

.005

.010

.015

.020

C

RESULTS AND DISCUSSIONS

-

-

taining

11 [-]

Turbine inlet temperature

turbine

100 [mmH2O]

200 [mmH2O]

-

-

72

76

80

84

88

92

96

100

104

108

112

116

[%]

4 8 12 16 20 24 28 32 36 40 44 48

Intake temperature [C]

ISO Conditions:T = 15 C

= 60 %

TIT = 1385 K

Heat rate

Power output



7/13

-

-

4 8 12 1 6 20 24 28 32 36 40 44 48


2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

8.0

T

[C]

TIT = 1385 K

= 60%

= 0.95

= 0.90

= 0.85

temperature drop.

4 8 12 16 20 24 28 32 36 40 44 48


27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

Poweroutp

ut[MW]

TIT = 1385 K

= 0.90

= 18%

= 60%

Base-case

4 8 12 16 20 24 28 32 36 40 44 48


25.5

26.0

26.5

27.0

27.5

28.0

28.5

29.0

29.5

30.0

30.5

31.0

Thermalefficiency[%]

TIT = 1385 K

= 0.90

= 18%

= 60%

Base-Case

4 8 12 16 20 24 28 32 36 40 44 48-4

0

4

8

12

16

20

24

28

32

36

40

T

[C]

Intake temperature[C]

TIT = 1385 K

Absorption chiller: = 18% and 60%

Evaporative cooling: = 0.90 and = 18%

Evaporative cooling: = 0.90 and = 60%



8/13

-

a

4 8 12 16 20 24 28 32 36 40 44 48


27

28

29

30

31

32

33

34

35

36

37

38

39

40

Poweroutput[MW]

TIT = 1385 K

Absorption chiller: =18%

Absorption chiller: =60%

Base-case

4 8 12 16 20 24 28 32 36 40 44 48


25.5

26.0

26.5

27.0

27.5

28.0

28.5

29.0

29.5

30.0

30.5

Thermaleffic

iency[%]

TIT = 1385 K

Absorption chiller: = 18%

Absorption chiller: = 60%

Base-case

4 8 12 16 20 24 28 32 36 40 44 48


30

31

32

33

34

35

36

37

38

39

Poweroutput[MW]

TIT = 1385 K

= 60 %

COP = 7.0

COP = 4.5

COP = 2.0

4 8 12 16 20 24 28 32 36 40 44 48


30

31

32

33

34

35

36

37

38

39

Poweroutp

ut[MW]

TIT = 1385 K

= 60 %

COP = 7.0

COP = 4.5

COP = 2.0



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-

obtained at

-

-

4 8 12 16 20 24 28 32 36 40 44 48


34.5

35.0

35.5

36.0

36.5

37.0

37.5

38.0

38.5

39.0

Poweroutput[MW]

TIT = 1385 K

COP = 4.5

= 18%

= 60%

4 8 12 16 20 24 28 32 36 40 44 48


-0.1

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

Massflow

wa

ter[kg/s]

ma

= 141.16 kg/s

TET = 1385 C

= 18%

Evaporative cooling: = 0.90

Absorption chiller

Mechanical chiller: COP = 4.5

4 8 12 16 20 24 28 32 36 40 44 48


-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

Coolingloa

d[MW]

TIT = 1385 K

= 18 %


Absorption chiller




10/13

-

-

Table 2.

Site 25.0

Latitude []

Longitude [] - 41.34

101.25

-

4 8 12 16 20 24 28 32 36 40 44 48


26

28

30

32

34

36

38

40

42

Poweroutput[MW]

TIT = 1385 K

= 18%

Evaporative cooling:

Absorption chiller

Compression chiller: COP = 4.5

Base case

= 0.90

4 8 12 16 20 24 28 32 36 40 44 48


25.5

26.0

26.5

27.0

27.5

28.0

28.5

29.0

29.5

30.0

30.5

31.0

Thermaleffic

iency[%]

TIT = 1385 K

= 18 %

Evaporative cooling:

Absorption chiller

Compression chiller: COP = 4.5

Base-case

= 0.90

27.0

27.5

28.0

28.5

29.0

29.5

30.0

30.5

31.0

31.5

32.0

32.5

33.0

33.5

34.0

Months

DECOCTSEPAUGJULJUNMAYAPR NOVMARFEBJAN

Ambienttemperature[C]

70

71

72

73

74

75

76

77

78

79

80

81

DECNOVOCTSEPAUGJULJUNMAYAPRMARFEBJAN

Relativehu

midity[%]

Months



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Oprar NainaSimari

-

-

a a

29.0

29.5

30.0

30.5

31.0

31.5

32.0

32.5

33.0

33.5

34.0

34.5

35.0

Months

DECOCTSEPAUGJULJUNMAYAPR NOVMARFEBJAN

Ambienttemperature[C]

DECNOVOCTSEPAUGJULJUNMAYAPRMARFEBJAN

Months

25

30

35

40

45

50

55

60

65

70

75

80

85

Relativehu

midity[%]


Absorption chiller


DECOUTSEPAUGJUL NOV0

400

800

1,200

1,600

2,000

2,400

2,800

3,200

3,600

4,000

4,400

Incremen

talelectricenergygeneration[MWh]

0

400

800

1,200

1,600

2,000

2,400

2,800

3,200

3,600

4,000

4,400

4,800

5,200

Mounths

DECOUTSEPAUGJUL NOV


Absorption chiller


Incrementalelectricenerg

ygeneration[MWh]



12/13

-

-

CONCLUSIONS

T0

-

ACKNOWLEDGMENTS

Table 3. I

43.28

32.02

43.24

53.00



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REFERENCES

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Analysis of TTGh Inlet Air Cooling Techniques Applied to Brazilian Sites 2012

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