Component 57: Gas Turbine (Extended)

In This Topic

Component 57: Gas Turbine (detailed characteristic field)

Specifications

Line connections
1	Air inlet
2	Exhaust gas outlet
3	Fuel inlet
4	Injection water / steam inlet
5	Generator power
6	Inlet for TIT-controller
7	Inlet for controlling VIGV (through component 46, type 8)
8	Inlet for controlling COS-PHI (through component 46, type 8)
9	Measurement value (P, T) for compressor inlet
10	Measurement value (P, T) for compressor outlet
11	Measurement value (Q) for generator terminals
12	Measurement value (P,T) for turbine outlet
13	Measurement value (P) for atmospheric pressure
14	Outlet for base-load (through component 46, type 9)

General User Input Values Characteristic Lines Physics Used Displays Example

General

Component 57 simulates the complete operation behaviour of a gas turbine in the vicinity of the design point. The following values are calculated with the help of characteristic diagrams:

power at terminals
total efficiency
flow rate of air
exhaust gas temperature
pressure ratio of the compressor
efficiency of the compressor
efficiency of the turbine

In the characteristic diagrams (comprising of 241 characteristic lines), there are dependencies of the following values

ambient pressure
ambient temperature
turbine inlet temperature (TIT)
water injection into the combustion chamber
inlet pressure loss
outlet pressure loss
position of the first blade row
COS PHI adjustment

These must be defined. This data is specific for the type.

The component also has a series of logic connections, on which the following values can be specified as measurement values:

on logic line No. 6 - the turbine inlet temperature (TIT)
on logic line No. 7 - the position of the first blade row (VIGV)
on logic line No. 8 - cos-phi of the generator
on logic line No. 9 - the inlet pressure of the vaporizer and its inlet temperature
on logic line No. 10 - the final pressure and the outlet temperature of the vaporizer
on logic line No. 11 - the generator power for comparative purposes
on logic line No. 12 - the turbine outlet pressure and the outlet temperature
on logic line No. 13 - the ambient pressure

Measuring values are assigned by component 46, (measured value input component).

The following values are determined through measurement values and characteristic lines:

the generator power,
the total efficiency,
the flow rate of air,
the exhaust temperature,
the pressure ratio of the compressor,
the efficiency of the compressor, and
the turbine efficiency

As such, specific values can be formed from the values given above.

It is expected, that the turbine inlet temperature is given or regulated by "Temperature", which lies at line-connection 6 (e.g. to deliver a demanded power).

The position of the first blade row is given and regulated by setting a component 46 on line-connection 7 specified as type 8. VIGV can be given as "POSITIVE" or "NEGATIVE" value.

COS-PHI of the generator is given and regulated by setting a component 46 on line-connection 7 specified as type 8.

The base-load factor is given by setting a component 46 on line-connection 8 specified as type 9.

User Input Values

QN	Gas turbine power (nominal)
ETGN	Total efficiency gas turbine (nominal)
M1N	Mass flow of air (nominal)
TEXN	Exhaust gas temperature (nominal)
DPIN	Inlet pressure loss
DPOUT	Outlet pressure loss
REV	Rotary speed
DQLGG	Sum of gear and generator losses
RQLCC	Relative combustion chamber heat loss
RDPCC	Relative combustion chamber pressure loss
TITB	Base load turbine inlet temperature
FDP	Type of DP calculation Like in Parent Profile (Sub profile option only) Expression =1: Calculate DPIN and DPOUT with simulation =2: Input DPIN, Calculation DPOUT =3: Input DPOUT, calculation DPIN =4: Input DPIN and DPOUT
FPEBS	(removed)

Generally, all inputs that are visible are required. But, often default values are provided.

For more information on colour of the input fields and their descriptions see Edit Component\Specification values

For more information on design vs. off-design and nominal values see General\Accept Nominal values

Notes for using FDP

--------------------------------------------------------------------

FDP is a selection index for taking into account different inputs for determining the inlet and the outlet pressure losses (DPIN, DPOUT)

=1: Calculation of

Inlet and outlet pressure loss through simulation results

DPIN = P(MEDIUM) - P(Inlet) = P13 - P1

DPOUT = P(Outlet) - P(MEDIUM) = P2 - P13

=2: Calculation of

Inlet pressure loss through user input values, and

outlet pressure loss through simulation results

DPIN = DPIN

DPOUT = P(outlet) - P(MEDIUM) = P2 - P13

and calculation of P1=P13-DPIN

=3: Calculation of

outlet pressure loss through user input value, and

inlet pressure loss through simulation results

DPIN = P(MEDIUM) - P(inlet) = P13 - P1

DPOUT = DPOUT

and calculation of P2=P13+DPOUT

=4: Calculation of

outlet and inlet pressure loss through user input values

DPIN = DPIN

DPOUT = DPOUT

and calculation of P1=P13-DPIN

and calculation of P2=P13+DPOUT

Characteristic lines

Terms

=======

TIT Turbine inlet temperature

T0 average temperature

P0 average pressure

DPIN Inlet pressure loss

DPOUT Outlet pressure loss

COSP COS-PHI of the generator

STEL Position of the leading blades

WSBN Water injection

Q Generator power

QN Nominal value of generator power

ETG Total efficiency

ETAN Nominal value of total efficiency

DL Air mass flow

DL1N Nominal value of air mass flow

TA Turbine exhaust gas temperature

TABN Nominal value of exhaust gas temperature

PIK Compressor pressure ratio

ETAC Compressor efficiency

ETAT Turbine efficiency

VIGV Position of the inlet valves

Generator power

===============

Q = QN * QF0 * QF1 * QF2 * QF3 * QF4 * QF5 * QF6 * QF7

QF0 = f (TIT) characteristic line 232

Characteristic diagram 1 : QF1 = f (T0 ,TIT)

characteristic line 1 to 7

Characteristic diagram 2 : QF2 = f (P0 ,TIT)

characteristic line 8 to 14

Characteristic diagram 3 : QF3 = f (DPIN,TIT)

characteristic line 15 to 21

Characteristic diagram 4 : QF4 = f (DPOT,TIT)

characteristic line 22 to 28

Characteristic diagram 5 : QF5 = f (COSP,TIT)

characteristic line 29 to 35

Characteristic diagram 6 : QF6 = f (STEL,TIT)

characteristic line 36 to 42

Characteristic diagram 7 : QF7 = f (WSBN,TIT)

characteristic line 43 to 49

Parameter is the TIT with

750, 800, 900, 1000, 1100, 1125, 1150 °C

Total efficiency

================

ETG = ETAN * EF0 * EF1 * EF2 * EF3 * EF4 * EF5 * EF6

EF0 = f (TIT) characteristic line 233

Characteristic diagram 8 : EF1 = f (T0 ,TIT)

characteristic line 50 to 56

Characteristic diagram 9 : EF2 = f (DPIN,TIT)

characteristic line 57 to 63

Characteristic diagram 10 : EF3 = f (DPOT,TIT)

characteristic line 64 to 70

Characteristic diagram 11 : EF4 = f (COSP,TIT)

characteristic line 71 to 77

Characteristic diagram 12 : EF5 = f (STEL,TIT)

characteristic line 78 to 84

Characteristic diagram 13 : EF6 = f (WSBN,TIT)

characteristic line 85 to 91

Parameter is the TIT with

750, 800, 900, 1000, 1100, 1125, 1150 °C

Air mass flow

=============

M1 = M1N * MF0 * MF1 * MF2 * MF3 * MF4 * MF5

MF0 = f (TIT) characteristic line 234

Characteristic diagram 14 : MF1 = f (T0 ,TIT)

characteristic line 92 to 98

Characteristic diagram 15 : MF2 = f (P0 ,TIT)

characteristic line 99 to 105

Characteristic diagram 16 : MF3 = f (DPIN,TIT)

characteristic line 106 to 112

Characteristic diagram 17 : MF4 = f (STEL,TIT)

characteristic line 113 to 119

Characteristic diagram 18 : MF5 = f (WSBN,TIT)

characteristic line 120 to 126

Parameter is the TIT with

750, 800, 900, 1000, 1100, 1125, 1150 °C

Exhaust gas temperature

=======================

TA = TABN + TF0 + TF1 + TF2 + TF3 + TF4 + TF5 + TF6

TF0 = f (TIT) characteristic line 235

Characteristic diagram 19 : TF1 = f (T0 ,TIT)

characteristic line 127 to 133

Characteristic diagram 20 : TF2 = f (P0 ,TIT)

characteristic line 134 to 140

Characteristic diagram 21 : TF3 = f (DPIN,TIT)

characteristic line 141 to 147

Characteristic diagram 22 : TF4 = f (DPOT,TIT)

characteristic line 148 to 154

Characteristic diagram 23 : TF5 = f (STEL,TIT)

characteristic line 155 to 161

Characteristic diagram 24 : TF6 = f (WSBN,TIT)

characteristic line 162 to 168

Parameter is the TIT with

750, 800, 900, 1000, 1100, 1125, 1150 °C

Compressor pressure ratio

=========================

for 22° <= VIGV < 5° : PIK = PK2 - (PK3-PK2)*(VIGV+15)/15

for 5° <= VIGV < 32° : PIK = PK1 - (PK2-PK1)* VIGV/15

Characteristic diagram 25 : PK1 = f (T0,TIT)

characteristic line 169 to 175 for VIGV= 32°

Characteristic diagram 26 : PK2 = f (T0,TIT)

characteristic line 176 to 182 for VIGV= 5°

Characteristic diagram 27 : PK3 = f (T0,TIT)

characteristic line 183 to 189 for VIGV=-22°

Parameter is TIT with

750, 800, 900, 1000, 1100, 1125, 1150 °C

Compressor efficiency

=====================

for 22° <= VIGV < 5° : ETAC = ETAC2 - (ETAC3-ETAC2)*(VIGV+15)/15

for 5° <= VIGV < 32° : ETAC = ETAC1 - (ETAC2-ETAC1)* VIGV/15

Characteristic diagram 28 : ETAC1 = f (T0,PIK)

characteristic line 190 to 196 for VIGV= 32ø

Characteristic diagram 29 : ETAC2 = f (T0,PIK)

characteristic line 197 to 203 for VIGV= 5ø

Characteristic diagram 30 : ETAC3 = f (T0,PIK)

characteristic line 204 to 210 for VIGV=-22ø

Parameter is PIK

14.8, 15.0, 15.2, 15.6, 16.0, 16.4, 16.8

Turbine efficiency

==================

for 22° <= VIGV < 5° : ETAT = ETAT2 - (ETAT3-ETAT2)*(VIGV+15)/15

for 5° <= VIGV < 22° : ETAT = ETAT1 - (ETAT2-ETAT1)* VIGV/15

Characteristic diagram 31 : ETAT1 = f (T0,PIK)

characteristic line 211 to 217 for VIGV= 32ø

Characteristic diagram 32 : ETAT2 = f (T0,PIK)

characteristic line 218 to 224 for VIGV= 5ø

Characteristic diagram 33 : ETAT3 = f (T0,PIK)

characteristic line 225 to 231 for VIGV=-22ø

Parameter is PIK

14.8, 15.0, 15.2, 15.6, 16.0, 16.4, 16.8

The characteristic lines 236 to 241 are no longer used.

Physics used

Equations

All cases

Total power Q = QN * QF0*QF1*QF2*QF3*QF4*QF5*QF6*QF7

Total efficiency ETG = ETAN * EF0*EF1*EF2*EF3*EF4*EF5*EF6

Air mass flow M1 = M1N * MF0*MF1*MF2*MF3*MF4*MF5

Exhaust gas temperature T2 = TABN + TF0+TF1+TF2+TF3+TF4+TF5+TF6

M1 = M1

M3 = Q/(ETA*NCV3)

M4 = WSBN

M2 = M1 + M3 + M4

H2 = f(T2)

H5 = Q/M5 with M5=1.0

Exhaust gas composition

- Weight fractions line 1, 3 and 4, and

- Combustion calculation

Component Displays

Display Option 1

Display Option 2

Example

Click here >> Component 57 Demo << to load an example.