FORMULA FOR STEAM TURBINE CYCLE HEAT RATE CALCULATION

1. TURBINE CYCLE HEAT
RATE CALCULATION
SHIVAJI CHOUDHURY

2. TURBINE CYCLE
PERFORMANCE CALCULATION
 1.Turbine cycle heat rate calculation.
(210 MW –KWU Turbine)
 2.HP turbine (HP cylinder ) efficiency
calculation .(210 MW –KWU Turbine)

3. WHAT IS HEAT RATE OF TURBINE
CYCLE
 Heat rate is the heat input required
per unit of power generated , for
specific fuel being fired and specific
site conditions.

4. 1.1.TURBINE CYCLE
HEAT RATE CALCULATION
 Heat rate calculation by enthalpy
method.
 For 210 MW KWU turbine.
 #ST: From steam table.

5. 1.2.TURBINE CYCLE HEAT RATE
CALCULATION(ENTHALPY METHOD)
 Heat rate calculation by enthalpy method.
 For 210 MW KWU turbine.
 CALCULATION IS DONE IN FOUR PARTS
 MEASUREMENT.
 ENTHALPY CALCULATION .
 CALCULATION FOR HOT REHEAT FLOW.
 TURBINE CYCLE HEAT RATE CALCULATION.

6. 1.3.MEASUREMENT
(TURBINE CYCLE HEAT RATE CALCULATION)
SN TAG NO DESCRIPTION MEASURED
VALUE
UNIT
1.1 FMST M S FLOW TO
TURBINE 692 T/HR
1.2 MWG MEGA WATT
GENERATED
206 MW
1.3 PMST PRESS AT MS
TURBINE INLET 132.2 KG/CM2
1.4 TMST TEMP AT MS
TURBINE INTET 528 DEG C
1.5 PFW PRESS FW AT
ECO IN 154 KG/CM2
1.6 TFW TEMP FW AT
ECO IN 238.5 DEG C
1.7 PHRH PRESS HRH
33.7
KG/CM2
1.8 THRH TEMP HRH
360 DEG C
1.9 PCRH PRESS CRH
37.07 KG/CM2

7. 1.4.MEASUREMENT
(TURBINE CYCLE HEAT RATE CALCULATION)
S.N TAG NO DESCRIPTION MEARURED
VALUE
UNIT
1.10 TCRH TEMP CRH STM
360
DEG C
1.11 FRHS FLO RH SPRAY
(R+H) 8.0
T/HR
1.12 FFW FLO FW ECO IN
625
T/HR
1.13 PEH6 PR EXT STM TO
HPH6 37.07
KG/CM2
1.14 TEH6 TEMP EXT STM TO
HPH6 360
DEG C
1.15 TDH6 TEMP DRN HPH6
206.5
DEG C
1.16 TFWHO6 TEMP FW HPH6
OUT 239.2
DEG C
1.17 TFWHI6 TEMP FW HPH6 IN
196.2
DEG C
1.18 PBFD PR BFP DIS HDR
171.0
KG/CM2

8. 1.5.ENTHALPY CALCULATION
(TURBINE CYCLE HEAT RATE CALCULATION)
(FROM STEAM TABLE); UNIT-KCAL/KG
S.N TAG NO DESCRIPTION EQUATION RESULTS
2.1 HMST ENTH MS TO TURB F(PMST,TMST) #ST
816.85
2.2 HFW ENTH FW TO ECON INLET F(PFW,TFW) # ST
246.13
2.3 HHRH ENTH HRH STM F(PHRH,THRH)#ST
840.70
2.4 HCRH ENTH CRH STM F(PCRH,TCRH) #ST
752.36
2.5 HEH6 ENTH EXT STM TO HPH6 F(PEH6,TEH6) #ST
752.36
2.6 HDH6 ENTH HPH6 DRN F(PEH6,TDH6)#ST
210.63
2.7 HFWHO6 ENTH FW HPH6 OUT F(PBFD,TFWHO6)#ST
247.12
2.8 HFWHI6 ENTH FW HPH6 IN F(TPBD,TFWHI6)#ST
199.52

9. 1.6.CALCULATION FOR HOT REHEAT FLOW
(TURBINE CYCLE HEAT RATE CALCULATION)
S.N TAG NO DESCRIPTION EQUATION RESULT UNIT
3.1 FEH6 FLOW EXT STM TO HPH6 FFW(HFWHO6-HFWHI6)
_________________
HEH6-HDH6
54.91
T/HR
3.2 FHRH HRH FLOW FHRH=FMST-FEH6+FRHS
645.09 T/HR

10. 1.7.TURBINE CYCLE HEAT RATE
CALCULATION
(TURBINE CYCLE HEAT RATE CALCULATION)
S
.NO
TAG
NO
DESCRIPTION EQUATION RESULTS UNIT
4.1 QT HEAT INPUT
TO TURBINE
CYCLE
= FMST(HMST-HFW)X1000
+FHRH(HHRH-CRH)X1000
451925.49X1000 KCAL/HR
4.2 THR TURBINE
HEAT RATE
QT
___________
MWGX1000
2193.81 KCAL/KWH

11. HEAT RATE OF TURBINE CYCLE
UNIT-Kcal/KWH
 210 MW TURBINE(LMZ)- 2063
 210 MW TURBINE (KWU)-
 210 MW- 1952
 168 MW - 2001
 500 MW TURBINE (KWU)-
 500 MW - 1945
 400 MW- 1988
 300 MW- 2063.2
 250 MW - 2134.3

12. 2.HP TURBINE (HP CYLINDER)EFFICIENCY
(ENTHALY DROP METHOD)CALCULATION
 HP turbine (HP cylinder) Efficiency
calculation is done in three parts
 1.Measurement
 2.Enthalpy calculation
 3.HP cylinder efficiency calculation
 4.Note

13. 2.1.MEASUREMENT (HP cylinder efficiency)
S.NO TAG NO DESCRITION MEASUREMENT UNIT
1.1 TMST TEMP MS TURBINE IN
528
DEG C
1.2 PMST PRESS MS TURBINE IN
132.2
KG/CM2
1.3 TCRH TEMP CRH
360
DEG C
1.4 PCRH PRESS CRH
37.07
KG/CM2

14. 2.2.ENTHALPY CALCULATION
(HP cylinder efficiency),
FROM STEAM TABLE , UNIT-KCAL/KG
S.NO TAG NO DESCRIPTION EQUATION RESULT
2.1 HMST ENTHALPY OF
MS TURBINE IN
F(TMST,PMST)
#ST 816.85
2.2 HCRHA ENTHALPY OF
CRH STEAM
(ACTUAL)
F(TCRH,PCRH)#ST
752.36
2.3 HCRHT ENTHTHALPY
OF CRH STM
(THEORITICAL)
F(PMST,TMST,
PCRH)#ST
730.86

15. 2.3.CALCULATION
(HP TURBINE EFFICIENCY)
S.NO TAG NO DESCRIPTION EQUATION RESULT UNIT
1 EHPT ENTH DROP EFFICIENCY
HPT
HMST-HCRHA
__________
HMST-HCRHT
X100
74.9 %

16. 2.4.NOTE
(HP TURBINE EFFICIENCY)
 EHPT- this is the ratio of ACTUAL CHANGE in
enthalpy across the HP TURBINE to theoretical
change (at constant entropy) expressed as a
percentage

17. TURBINE CYCLE - 500 MW
Turbine cycle
Heat hate

18. TURBINE 500 MW
Turbine Cylinder
efficiency

19. HEAT RATE OF TURBINE CYCLE
UNIT-Kcal/KWH
 210 MW TURBINE(LMZ)- 2063
 210 MW TURBINE (KWU)-
 210 MW- 1952
 168 MW - 2001
 500 MW TURBINE (KWU)-
 500 MW - 1945
 400 MW- 1988
 300 MW- 2063.2
 250 MW - 2134.3

20. Turbine cycle heat rate

21. STANDARDS
 ASME PTC 6-Steam turbine
performance test code.
 DIN 1943 –Thermal acceptance tests
for steam turbine.
 BS EN 60953-Rules for steam turbine
thermal acceptance test.
 IEC 953 –Rules for steam turbine’s
thermal acceptance test.

22. THANKING YOU