GE Power & Water
Combined Cycle
Combined Heat and Power
Dipti Dash
(CHP)
Capabilities for Industry
Dipti Dash
Presented at:
International District Energy Association (IDEA)
104th Annual Conference
June 2-5, 2013 l Miami, Florida, USA
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Objective
Part 1: Combined Cycle CHP Concepts
Part 2: Combined Cycle CHP Examples
for District Heating Application
© 2013, General Electric Company.
No part of this document may be reproduced, transmitted, stored in any system in any form, or by any means without the prior written permission of General Electric Company.
Part 1:
Combined Cycle
CHP Concepts
© 2013, General Electric Company.
No part of this document may be reproduced, transmitted, stored in any system in any form, or by any means without the prior written permission of General Electric Company.
GE Gas Turbine output
Heavy Duty Gas Turbine Output
Aeroderivative Gas Turbine Output
Note: Based on 2009 Data
5
© 2013, General Electric Company.
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Typical combined cycle CHP
for Industrial/DH application
Industrial Process / District
Heating System
Heat &
Power
Condensate
Combined Cycle CHP
LP Steam
HR Steam
HP Steam
Inlet Air
LP
HP
IP
Fuel
HP SH
RH
HP EVAP
HP ECO
IP SH
IP EVAP
IP ECO
LP SH
LP EVAP
LP ECO
GEN
CLUTCH
GT
COMP
Gas Turbine
HRSG
HP/ IP
Steam Turbine
Fuel
1
LP
LP
From
Cond.
Pump
Water Cooled
Condenser
Cond
CR Steam
HP/IP FW
Pumps
Sources of heat
Low grade heat
High grade heat
Cond. Pumps
GSC
1
To HRSG
LP ECO
© 2013, General Electric Company.
No part of this document may be reproduced, transmitted, stored in any system in any form, or by any means without the prior written permission of General Electric Company.
6
Typical combined cycle CHP capability curve
Net Power Export, MW
2
CST
3
BPST 4
No ST
1
8
7
6
Thermal Net Export, MMBtu/ Hr
1 – 1P, unfired, CST, 0 steam
2 – 3P, fired, CST, 0 steam
3 – 3P, fired, CST, Max steam
4 – 3P, fired, BPST, Max steam
5 – 1P, fired, No ST, Max steam
6 – 1P, unfired, No ST, Max steam
7 – 1P, unfired, BPST, Max steam
8 – 1P, unfired, CST, Max steam
5
CST – Condensing steam turbine
BPST – Back Pressure steam turbine
© 2013, General Electric Company.
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7
Typical CHP capability family curve
for GE Gas Turbine 9F 7-series
2500
Net Power Export, MW
2000
1500
1000
500
1 Unit
2 Units
3 Units
0
0
1000
2000
3000
4000
5000
6000
7000
8000
Thermal Net Export, MMBtu/ Hr
Note: There will be variations based on site specific conditions.
© 2013, General Electric Company.
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8
CHP solution development steps
Select the best GT
based on customer
requirements for
power, fuel flexibility,
redundancy, cost,
performance and
availability
Gas Turbines
Heavy Duty
Aeroderivative
Bottoming Cycle
HRSG
•
•
•
•
1P/ 2P/ 3P HRSG
Drum/ Once Through
Supp fired/ Fresh Air fired
NOx/ SOx/ CO2 control
STG
•
•
•
•
Cooling
GE (Thermal/O&G) or Non-GE • Once through
Condensing / Back Pressure • Cooling Tower
Water / Air Cooled
• Air Cooled
Customized extraction
Power Cycle
• Customized cycle
• Steam Bypasses
• Variable / Fix Speed
BFP
• Condensate System
Customized bottoming
cycle based on process
needs, redundancy,
cost, performance and
plant location
Auxiliary Equipment
Aux Boiler
DG
No Break
DG/UPS
Chillers
CO2 Extraction
CO2 Extraction Plant
CO2 Storage
Customized auxiliary
equipment & systems
based on customer/
process needs, startup power and steam
demand
9
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Steam turbines for CHP
• Automatic extraction:
Provide steam at “controlled
pressure” consistent with
process requirements
• Uncontrolled extraction:
Used when process
extractions are small
compared to total turbine flow
• Condenser: Adds power
generating flexibility
10
© 2013, General Electric Company.
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Steam turbine extraction map
Typical single-automatic extraction turbine-performance map
© 2013, General Electric Company.
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11
Part 2:
Combined Cycle CHP
Examples for DH Application
© 2013, General Electric Company.
No part of this document may be reproduced, transmitted, stored in any system in any form, or by any means without the prior written permission of General Electric Company.
Germany leading EU CHP policies
implementation
• Government subsidies for
Typical German CCDH Load Profile
high efficiency (>85% Cogen
Eff.) CHP/DH plants
• Subsidies linked to CHP related
power at Max DH load
• Selling power from Combined
Cycle not profitable 80% of
the time due to large
renewable source of power
• Combined Cycle runs on
Part Load just enough for
providing DH heat
• Power-to-heat reference
number “Stromverlustkennziffer” should be enhanced
Plant configuration must consider the load profile and
provide a
thermo-economic balanced engineering approach for high
efficiency at Max DH, full condensing and part load
operations.
© 2013, General Electric Company.
No part of this document may be reproduced, transmitted, stored in any system in any form, or by any means without the prior written permission of General Electric Company.
13
CHP related power concept
Reference German District Heating Association (AGFW) Guideline FW
308
Waste Heat
Fuel
Usabl
e
Heat
Captive
Fuel
Net Power
Usabl
e
Heat
Waste Heat
CHP related GT Power
CHP related ST Power
Total CHP related Power = CHP related GT Power + CHP related ST
AHK+ZF = Including supplemental
heat
Power
EK-DT = Extraction condensing steam
boiler
G = Generator
K = Condenser
P = Pump
turbine
GT = Gas Turbine
HK = Heating Condenser
Verdichter = Compressor
© 2013, General Electric Company.
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14
Combined cycle CHP solution
for German DH application
District Heating System
Condensate to Condenser
LP Extraction 2
LP Extraction 1
LP Steam
HR Steam
HP Steam
Inlet Air
LP
HP
IP
Fuel
HP SH
RH
HP EVAP
HP ECO
IP SH
IP EVAP
IP ECO
LP SH
LP EVAP
LP ECO
GEN
CLUTCH
GT
COMP
Gas Turbine
HP
IP
LP
LP
Steam Turbine
HRSG
1
From
Cond.
Pump
Water Cooled
Condenser
Cond
CR Steam
HP/IP FW
Pumps
Get the most from the utilization of low grade energy for high
CHP related power, and power-to-heat reference number
Cond. Pumps
GSC
1
To HRSG
LP ECO
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15
Typical CCDH load profile in Asia
Annual Operating Hours
• No Government subsidies
3000
• Selling power from combined cycle not
Annual Hours
2500
profitable during off-peak hours
2000
• Combined cycle runs on part load just enough 1500
for providing DH heat during off-peak
1000
500
• Plant shut down during summer nights
0
16
© 2013, General Electric Company.
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District Heating and Cooling in Asia
• Centralized heat supply by hot water
supply through buried pre-insulated pipe
• Heat production in large facility … CHP,
Heat only boilers (HOB)
• Hot Water Production with DH Heater(s)
–
ST extraction steam, HOB
• Large heat demand variation mainly due
to ambient temperature
• Hot water storage in accumulator to
improve heat demand vs. production
Season
• Variable DH temperature according to
Winter
heat demand(Supply/Return)
– Winter: 120-100°C/65–55°C
Summer
–
Summer: 100-95°C/65-55°C
• Evaluate electricity and heat separately
at multiple operating mode
–
–
ST Operating Mode
LPT declutched
Full Condensing
Spring & Fall Extraction Condensing
Emergency
ST Bypass
Electricity and heat for winter, elec.
For other seasons (evaluation factor)
IPP: Electricity and heat throughout the
seasons (pro forma)
17
© 2013, General Electric Company.
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Combined cycle CHP solution for DH application in
Asia
District Heating System
Stand-by
Emergency
Oil/ Gas
Heat only
Boiler (HOB)
Condensate to Condenser
ST Bypass
System
LP Extraction
IP Extraction
LP Steam
HR Steam
HP Steam
Inlet Air
LP
HP
IP
Fuel
HP SH
RH
HP EVAP
HP ECO
IP SH
IP EVAP
IP ECO
LP SH
LP EVAP
LP ECO
GEN
GEN
CLUTCH
GT
COMP
Gas Turbine
HP
IP
LP
LP
Steam Turbine
HRSG
1
From
Cond.
Pump
Water Cooled
Condenser
Cond
CR Steam
HP/IP FW
Pumps
Reliable DH water supply. Plant to be enhanced
for full condensing, max DH and part condensing
1
To HRSG
LP ECO
Cond. Pumps
GSC
© 2013, General Electric Company.
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18
For more GE capabilities see GER 3430G at
http://site.ge-energy.com/prod_serv/products/tech_docs/en/downloads/GER3430G.pdf
Contact your local GE Sales Application Engineer for help
Resources
1. GE document GER 3430G – Cogeneration Application Considerations
2. German District Heating Association (AGFW) Work sheet FW308 – Certification of CHP Plant
3. GE Marketing and Sales documentation
© 2013, General Electric Company.
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