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
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
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
