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Thursday , Nov 21st, 2013
A Maharatna Company
Advanced Technologies and Best Practices for SC TPPs
A Presentation by: D.K. Dubey General Manager (PE- Mech/SG, WS) NTPC Limited
NTPC Plan for improvement
of Power Plant Efficiency
New Delhi
Contents
NTPC’s Efficiency Approach 1
Supercritical as the central idea 2
Forays into advanced energy conversion 3
Experience Based deployment strategy 4
Contents
NTPC’s Efficiency Approach 1
Coal forms the edifice of Indian power story
Source: CEA, excluding captive capacity
Total Installed Capacity ~ 229 GW*
12% 17%
59% 9%
Hydro
Coal
RES
Gas
(134+ GW)
*as on 31.10.2013
Of the total installed capacity of 41,794 MW for NTPC 35,889 MW is based on coal
NTPC’s Efficiency focus over the years
New
Technology
Induction
Plant Efficiency
control
Stack Emissions
control
41000 + MW
Contents
Supercritical as the central idea 2
Supercritical Technology a natural choice
0.40-0.30
0.65-0.60
0.75-0.70
0.80-0.75
0.85-0.80
0.90-0.85
NGCC
IGCC +FC
IGCC
USC
Super critical
PC Subcritical
0% 20% 40% 60%
46-58%
> 50%
45-49%
>41.5
39.3-40.5%
37.9-38.5%
Specific CO2
emission * Efficiency
%
CO
2 e
mis
sio
n r
edu
ctio
n
po
ten
tial
Tech
no
logy
Mat
uri
ty
* Figure in kg/KWh
Supercritical is central to NTPC’s posturing
Ultra supercritical technology with temperature upto 600 °C/ 600 °C introduced in
North Karanpura Project.
2018
42%
2020
46%
2025 2006
38.9%
500MW
Sub-Critical 565RH
2011
39.5%
SC
247 537/565
2013
40.8%
SC
247 565/593
USC
270 600/620
Adv-USC
310 710/720
1st Unit
AUSC AUSC
Fleet 1st Unit
USC
Barh-II
onwards Sipat-I Simh-II
46%
1998
38.6%
Rihand-II
500MW
Sub-Critical Mod.
Indian Adv-USC Program
Adv-USC
Collaboration between NTPC, BHEL and IGCAR
Time schedule 7 years (2½ R&D & 4½ yrs plant Const.)
Objective: 800 MWe Adv-USC Plant having 310 ksc pr/ 710°C MS/ 720°C RH Temp
Status Update
•Pre-project R&D for Boilers started
Test loops utilizing indigenously developed advanced materials, to be deployed for high temp applications, shall be installed at NTPC, Dadri for hot
corrosion tests.
Characterization of two Adv-USC materials in
advanced stages.
•Plant Design Memorandum (PDM) finalized
•Pre Project R&D for design & Devpt. of turbine blade
profiles for HPT for Adv-USC parameters started
•Other projects like design and development of thick
walled header for SH, HPT bypass valve are being planned.
Project Implementation Mode
Research
Development
Demonstration
Deployment
No global reference at present
Target efficiency of 46% as against 38% in sub-critical plants resulting in ~ 20% reduction in carbon emissions
Contents
Forays into advanced energy conversion 3
Gas Turbine- the key building block
2014
J class
1600 °C
Improvements in Gas Turbine Technology will boost gasification based technology adoption
IGCC- the promising option
IGCC offers Better Coal Utilization
•Potential for higher efficiency due to GT use
•Cheaper dedusting & deSOx- low syngas volumes
•Low Nox- low reactor temperatures
PC
SCP
C
NG
CC
P
FBC
IGC
C
0
10
20
30
40
50
60
70
80
The
rmal
Eff
icie
ncy
(%)
Current Possible Future
CCT Efficiency Comparison
0
100
200
300
400
500
600
700
0
10
20
30
40
50
60
70
GT
Ca
pa
cit
y (
MW
)
CC
PP
E
ffic
ien
cy (
%)
Time Line
GT Technology Status Market Introduction: 463 MW Class h = 62% by 2014
2013
NTPC IGCC Program Update
IGCC
Set up 100 MWe Net capacity IGCC demo Plant
Plant Location: NTPC Dadri
Fluidized bed Technology
Tech. Specs Phase-I finalized
• Establish the gasification process for Indian coals.
• Establish design for Gasification Island and other key equipment.
• Establish the IGCC process package.
• Establish in-house Engineering capability for IGCC plants
• Establish O&M systems for IGCC plant
• Establish commercial viability with non recourse funding
Technology Demo Project Benefits
Contents
Experience Based deployment strategy 4
Knowledge based Efficiency program Deployment
Technology scans
OEM dialogues
Visits for 1st hand exposure
Global Operation feedback
International experts inputs
Supercritical induction
IGCC Strategy
Background studies
Coal Testing in Gasifier
Industry experience capture
International experts inputs
International experience
capture
Efficiency Increase Program Deployment Strategy
• Availability analysis and failure scan
• Contemporary Indian industry experience
• Technology selection as per Indian fuel & MRO
(maintenance-repair-overhaul) situation
•Pilot tests, demo project testing
• Developmental work space within EPC contract
• Demo project R&D Plan
The presenter may be contacted at: [email protected]