Cost and Performance Baseline for Fossil Energy Plants

Transcription

1 Cost and Performance Baseline for Fossil Energy Plants CMU Seminar September 26, 2007 Julianne Klara, National Energy Technology Laboratory

2 Fossil Energy Plant Baseline Study -Report Contains- Subcritical PC Supercritical PC IGCC NGCC Consistent design requirements Up-to-date performance and capital cost estimates Technologies built now and deployed by

3 Technical Approach 1. Extensive Process Simulation (ASPEN) All major chemical processes and equipment are simulated Detailed mass and energy balances Performance calculations (auxiliary power, gross/net power output) 2. Cost Estimation Inputs from process simulation (Flow Rates/Gas Composition/Pressure/Temp.) Sources for cost estimation Parsons Vendor sources where available Follow DOE Analysis Guidelines 3

4 Study Matrix Plant Type IGCC ST Cond. (psig/ F/ F) GT Gasifier/ Boiler Acid Gas Removal/ Separation / Sulfur Recovery Cap 1800/1050/1050 Selexol / - / Claus GE (non- Selexol / Selexol / Claus 90% capture cases) F CoP MDEA / - / Claus Class E-Gas 1800/1000/1000 Selexol / Selexol / Claus 88% 1 ( capture Sulfinol-M / - / Claus Shell cases) Selexol / Selexol / Claus 90% PC 2400/1050/1050 Subcritical 3500/1100/1100 Supercritical Wet FGD / - / Gypsum Wet FGD / Econamine / Gypsum 90% Wet FGD / - / Gypsum Wet FGD / Econamine / Gypsum 90% NGCC 2400/1050/950 F Class HRSG - / Econamine / - 90% 1 capture is limited to 88% by syngas CH 4 content GEE GE Energy CoP Conoco Phillips 4

5 Design Basis: Coal Type Illinois #6 Coal Ultimate Analysis (weight %) As Rec d Dry Moisture Carbon Hydrogen Nitrogen Chlorine Sulfur Ash Oxygen (by difference) HHV (Btu/lb) 11,666 13,126 5

6 Environmental Targets Pollutant IGCC 1 PC 2 NGCC 3 SO lb/mmbtu lb/mmbtu < 0.6 gr S /100 scf NOx 15 ppmv 15% O lb/mmbtu % O 2 PM lb/mmbtu lb/mmbtu Negligible Hg > 90% capture 1.14 lb/tbtu Negligible 1 Based on EPRI s CoalFleet User Design Basis Specification for Coal-Based IGCC Power Plants 2 Based on BACT analysis, exceeding new NSPS requirements 3 Based on EPA pipeline natural gas specification and 40 CFR Part 60, Subpart KKKK 6

7 Economic Assumptions Startup 2010 Plant Life (Years) 20 Capital Charge Factor, % High Risk (All IGCC, PC/NGCC with capture) 17.5 Low Risk (PC/NGCC without capture) 16.4 Dollars (Constant) 2007 Coal ($/MM Btu) 1.80 Natural Gas ($/MM Btu) 6.75 Capacity Factor IGCC 80 PC/NGCC 85 7

8 Total Plant Cost Includes Equipment Initial chemicals and catalyst loadings Materials Labor Direct and Indirect Engineering and Construction Management Project and Process Contingencies Excludes Owner s costs Land, licensing and permitting, AFUDC Escalation to period of performance Taxes (except payroll) Site specific considerations Labor incentives in excess of 5 day/10 hour work week EPC premiums 8

9 Costs do not include Risk Wrap Contract approach assumed for study EPCM (engineering, procurement, construction management) Owner has control of project Risk is reduced with time as scope definition improves by time of contract award as opposed to.. EPC (engineer, procure, construct) Lump sum contract where contractor assumes all risk for performance, schedule, and cost If willing to accept risk, premiums applied can raise costs dramatically 9

10 Power Plant Configurations Current State-of-the-Art 10

11 Current Technology IGCC Power Plant Process Design Assumptions: Dual Train: 2 gasifiers, 2 Comb. Turbine, 1 Steam Turbine Oxygen: 95% O 2 via 2 via Cryogenic ASU, ~4-7% Air Air Extraction from combustion turbine Turbines: Advanced F-Class Turbine --232MWe N 2 dilution 2 employed to to full full extent in in all all cases Humidification/steam injection used only when necessary to to meet syngas specification of of ~120 Btu/scf LHV Steam: 1800psig/1050 F/1050 F 11

12 Pre-Combustion Current Technology IGCC Power Plant with Scrubbing Mole % (Dry) H CO Mole % (Dry) H CO Capture Advantages: High P CO2 CO2 Process Design 2. Assumptions: 2. Low Volume Syngas Stream 3. Oxygen: 95% O 2 via 2 via Cryogenic 3. Produced at ASU, No at Pressure No air air extraction from combustion turbine Steam: 1800psig/1000 F/1000 F Compression: 2,200 Psig 12

13 Post-Combustion Current Technology Pulverized Coal Power Plant with Scrubbing Steam to Econamine FG+ Power Flue Gas 2,200 Psig Steam Air Coal PC Boiler (With SCR) Bag Filter ID Fans Wet Limestone FGD Steam Ash Process Design Assumptions: Steam: Subcritical 2400psig/1050 F/1050 F Supercritical 3500psig/1100 F/1100 F * Orange Blocks Indicate Unit Operations Added for Capture Case Capture Challenges: Dilute Flue Gas (10-14% ) ) Low Pressure Million scfm ,000 ton /day removed Large Parasitic Loads (Steam + Compression) 13

14 Current Technology Natural Gas Combined Cycle* * Orange Blocks Indicate Unit Operations Added for Capture Case Natural Gas HRSG Direct Contact Cooler Air Combustion Turbine Blower Cooling Water Stack Gas Reboiler Steam Condensate Return MEA Stack 2200 psig Compressor NOx Control: LNB + SCR to to maintain % O 2 2 Steam Conditions: 2400 psig/1050 F/950 F 14

15 IGCC Power Plant Cost and Performance No capture 15

16 IGCC Performance Results No Capture GE Energy E-Gas Shell Gross Power (MW) Auxiliary Power (MW) Base Plant Load Air Separation Unit Gas Cleanup Total Aux. Power (MW) Net Power (MW) Heat Rate (Btu/kWh) 8,922 8,681 8,304 Efficiency (HHV)

17 IGCC Economic Results No Capture GE Energy E-Gas Shell Plant Cost ($/kwe) 1 Base Plant 1,323 1,272 1,522 Air Separation Unit Gas Cleanup Total Plant Cost ($/kwe) 1,813 1,733 1,977 Capital COE ( /kwh) Variable COE ( /kwh) Total COE 2 ( /kwh) Total Plant Capital Cost (Includes contingencies and engineering fees) 2 January 2007 Dollars, 80% Capacity Factor, 17.5% Capital Charge Factor, Coal cost $1.80/10 6 Btu 17

18 IGCC Power Plant Cost and Performance With Capture 18

19 Impact of Adding CCS GE Energy Capture NO YES Gross Power (MW) Auxiliary Power (MW) Base Plant Load Air Separation Unit Gas Cleanup/ Capture 4 18 Compression - 27 Total Aux. Power (MW) Net Power (MW) Heat Rate (Btu/kWh) 8,922 10,505 Efficiency (HHV) Energy Penalty Steam for WGS and Selexol in ASU air comp. load w/o CT integration Includes H 2 S/ Removal in Selexol Solvent in auxiliary load for compression to 2200 psig 1 Capture Energy Penalty = Percent points decrease in net power plant efficiency due to Capture 19

20 Impact of CCS on IGCC Capital Cost $3,000 $2,500 $2,000 $1,813 $1,733 $1,977 $2,390 $2,431 $2,668 GEE R+Q $/kw $1,500 $1,000 CoP E-Gas Shell $500 $0 w/o CCS w/ CCS Total Plant Cost Note: 2007 (Jan) Dollars CCS = Carbon capture and sequestration CCS increases TPC by about 35 percent (or ~ $660/kW) 20

21 Impact of CCS on IGCC Efficiency % Efficiency 50% 45% 40% 35% 30% 25% 20% 15% 10% 5% 0% 38.2% 39.3% 41.1% 32.5% 31.7% 32.0% GEE R+Q CoP E-Gas FSQ Shell w/o CCS w/ CCS Net Plant HHV Efficiency (%) CCS = Carbon capture and sequestration Average energy penalty for CCS is 7 percentage points 21

22 Impact of CCS on IGCC Cost of Electricity LCOE, mills/kwh ($2007) LCOE by Component GE GE CCS CoP CoP CCS Shell Shell CCS CO2 TS&M Plant O&M Plant Fuel Cost Plant Capital Cost CCS = Carbon capture and sequestration 22

23 PC Power Plant Cost and Performance 23

24 Pulverized Coal Performance Summary Subcritical Supercritical Coal Flow Rate 5,252 7,759 4,935 7,039 Captured (Ton/day) 0 16, ,029 Gross Power (MW) Auxiliary Power (MW) Base Plant Load Forced + Induced Draft Fans Flue Gas Cleanup Capture Compression Total Aux. Power (MW) Net Power (MW) Efficiency (%HHV) Energy Penalty (% Points) Capture decreases net efficiency by ~12 percentage points 24

25 Subcritical PC Performance Subcritical Coal Flow Rate 5,252 7,759 Captured (Ton/day) 0 16,566 Gross Power (MW) Auxiliary Power (MW) Base Plant Load Forced + Induced Draft Fans Flue Gas Cleanup 4 5 Capture - 24 Compression - 52 Total Aux. Power (MW) Net Power (MW) Efficiency (%HHV) Energy Penalty (% Points) % Increase in Coal Flow Rate Larger Base Plant MEA Scrubbing ~17,000 TPD to 2,200 Psig 25

26 Pulverized Coal Economic Results Subcritical Supercritical Capture NO YES NO YES Plant Cost ($/kwe) 1 Base Plant 1,302 1,689 1,345 1,729 Gas Cleanup (SOx/NOx) Capture Compression Total Plant Cost ($/kwe) 1,549 2,895 1,575 Capital COE ( /kwh) Variable COE ( /kwh) TS&M COE ( /kwh) Total COE 2 ( /kwh) Increase in COE (%) $/tonne Avoided Total Plant Capital Cost (Includes contingencies and engineering fees) 752 2,870 PC PC CO capture 2 capture results results in: in: Increase 6.75 Increase in in Capital Capital Cost Cost (TPC) (TPC) ~ $1,325/kW $1,325/kW Increase Increase in in COE COE ~5 ~5 cents/kwh cents/kwh 4.34 (~ (~ 83%) 83%) 2 January 2007 Dollars, 85% Capacity Factor, 16.4% (no capture) 17.5% (capture) Capital Charge Factor, Coal cost $1.80/10 6 Btu, Natural Gas cost $6.75/10 6 Btu

27 Technology Comparison IGCC, PC and NGCC 27

28 Net Plant Efficiency Efficiency, % (HHV Basis) Avg IGCC Avg IGCC CCS PC-Sub PC-Sub CCS PC-Super PC-Super CCS NGCC NGCC CCS CCS = Carbon capture and sequestration 28

29 Total Plant Cost $/kw ($2007) Avg IGCC Avg IGCC CCS PC-Sub PC-Sub CCS PC-Super PC-Super CCS NGCC NGCC CCS Total Plant Capital Cost includes contingencies and engineering fees CCS = Carbon capture and sequestration 29

30 Cost of Electricity LCOE by Cost Component CO2 TS&M LCOE, mills/kwh Plant O&M Plant Fuel Costs Plant Capital Cost Avg IGCC Avg IGCC CCS sub-pc sub-pc CCS super-pc super-pc CCS January 2007 Dollars, Coal cost $1.80/10 6 Btu, Gas cost $6.75/10 6 Btu CCS = Carbon capture and sequestration TS&M = transport, storage, and monitoring NGCC NGCC CCS 30

31 Mitigation Costs Avg IGCC Sub PC Super PC NGCC % Increase in COE $/tonne CO2 avoided 31

32 Criteria Pollutant Emissions for All Cases Hg lb/tbtu SO2 NOx PM Hg GE GE w/co2 CoP CoP Shell Shell PC-sub PC-sub PC-SC PC-SC NGCC NGCC w/co2 w/co2 w/co2 w/co2 w/co2 Emissions (lb/mmbtu) GE GE w/co2 CoP CoP w/co2 Shell Shell w/co2 PC-sub PC-sub w/co2 PC-SC PC-SC w/co2 NGCC NGCC w/co2 32

33 30 Raw Water Usage per MWnet (Absolute) 25.7 Raw Water Usage, gpm/mwnet GE GE w/co2 CoP CoP w/co2 Shell Shell w/co2 PC-sub PC-sub w/co2 PC-SC PC-SC w/co2 NGCC NGCC w/co2 33

34 Result Highlights Coal-based plants using today s technology are efficient and clean 20 year levelized COE: PC lowest cost generator IGCC total plant cost ~20% higher than PC With CCS: IGCC lowest coal-based option for CCS PC TPC > IGCC TPC PC efficiency < IGCC efficiency LCOE* equal when natural gas price is: No Capture IGCC: $7.99/MMBtu PC: $6.15/MMBtu With Capture IGCC: $7.73/MMBtu PC: $8.87/MMBtu * At baseline coal cost of $1.80/MMBtu 34

35 NETL Viewpoint Improved efficiencies and reduced costs are required to improve competitiveness of advanced coal-based systems In today s market and regulatory environment Also in a carbon constrained scenario Opportunities for Fossil Energy RD&D Improve performance and cost of clean coal power systems including development of new approaches to capture and sequester greenhouse gases 35

36 Thank You!! Report, Desk Reference & Slides Available Cost and Performance Baseline of Fossil Energy Plants, DOE/NETL- 2007/1281, May Fossil Energy Power Plant Desk Reference 2007/1282, May DOE/NETL- 36

37 Backup Slides 37

38 Removal Cost versus Avoided Cost $/tonne of CO2 captured (removed) Function of the bulk quantity of CO2 removed from the capture power plant and the increase in COE required for capture Difference in COE divided by amount of CO2 captured in the capture plant $/tonne of CO2 avoided (mitigation cost) Accounts for the extra energy (auxiliary power) spent to capture CO2, which increases total CO2 per net MWh Difference in COE divided by difference in emissions between reference plant and capture plant 38

39 Comparison of CO2 Removed and Avoided The amount of CO2 avoided is always less than the amount of CO2 captured Captured Capture Plant CO2 emissions Avoided CO2 captured Reference Plant Produced (tonne/mwh) 39

40 GE Energy Radiant Coal Slurry 63 wt.% High Pressure Steam Coal Water Radiant Syngas Cooler Quench Chamber 95% O 2 Radiant Quench Gasifier 2,500 O F 1,100 O F 419 O F Syngas 410 F, 800 Psia Composition (Mole%): H 2 26% 7% 12% H 2 O 34% Other 1% H 2 O/CO Saturated = 1.3 Syngas 398 O F Syngas Scrubber Slag/Fines To Acid Gas Removal or To Shift Design: Pressurized, single-stage, downward firing, entrained flow, slurry feed, oxygen blown, slagging, radiant and quench cooling Note: All gasification performance data estimated by the project team to be representative of GE gasifier 40

41 ConocoPhillips E-Gas Stage 2 Syngas Syngas 1,700 F, 614 psia Composition (Mole%): H 2 26% CO 37% 14% H 2 O 15% CH 4 4% Other 4% H 2 O/CO = 0.4 To Fire-tube boiler To Acid Gas Removal or To Shift Coal Slurry 63 wt. % (0.78) (0.22) Char Design: Pressurized, two-stage, upward firing, entrained flow, slurry feed, oxygen blown, slagging, fire-tube boiling syngas cooling, syngas recycle 95 % O Slag 2 Quench Stage 1 2,500 o F 614 Psia Slag/Water Slurry 41 Note: All gasification performance data estimated by the project team to be representative of an E-Gas gasifier

42 HP Steam Convective Cooler Soot Quench & Scrubber Shell Gasification Design: Pressurized, single-stage, downward firing, entrained flow, dry feed, oxygen blown, convective cooler Syngas Quench 2 Gasifier 2,700 o F 615 psia Notes: 1. All gasification performance data estimated by the project team to be representative of Shell gasifier. 2. capture incorporates full water quench instead of syngas quench. Steam HP Steam Syngas 350 F, 600 Psia 95% O 2 Dry Coal Slag 650 o F Composition (Mole%): H 2 29% CO 57% 2% H 2 O 4% Other 8% H 2 O/CO = 0.1 To Acid Gas Removal or To Shift Source: The Shell Gasification Process, Uhde, ThyssenKrupp Technologies 42

43 IGCC Performance Results GE Energy E-Gas Shell Capture NO YES NO YES NO YES Gross Power (MW) Auxiliary Power (MW) Base Plant Load Air Separation Unit Gas Cleanup/ Capture Compression Total Aux. Power (MW) Net Power (MW) Heat Rate (Btu/kWh) 8,922 10,505 8,681 10,757 8,304 10,674 Efficiency (HHV) Energy Penalty Capture Energy Penalty = Percent points decrease in net power plant efficiency due to Capture

44 IGCC Economic Results GE Energy E-Gas Shell Capture NO YES NO YES NO YES Plant Cost ($/kwe) 1 Base Plant 1,323 1,566 1,272 1,592 1,522 1,817 Air Separation Unit Gas Cleanup/ Capture Compression Total Plant Cost ($/kwe) 1,813 2,390 1,733 2,431 1,977 2,668 Capital COE ( /kwh) Variable COE ( /kwh) TS&M COE ( /kwh) Total COE 2 ( /kwh) Increase in COE (%) $/tonne Avoided Total Plant Capital Cost (Includes contingencies and engineering fees) 2 January 2007 Dollars, 80% Capacity Factor, 17.5% Capital Charge Factor, Coal cost $1.80/10 6 Btu 44

45 PC and NGCC Performance Results Subcritical Supercritical NGCC Capture NO YES NO YES NO YES Gross Power (MW) Base Plant Load Gas Cleanup/ Capture Compression Total Aux. Power (MW) Net Power (MW) Heat Rate (Btu/kWh) 9,276 13,724 8,721 12,534 6,719 7,813 Efficiency (HHV) Energy Penalty Capture Energy Penalty = Percent points decrease in net power plant efficiency due to Capture 45

46 PC and NGCC Economic Results Subcritical Supercritical NGCC Capture NO YES NO YES NO YES Plant Cost ($/kwe) 1 Base Plant 1,302 1,689 1,345 1, Gas Cleanup (SOx/NOx) Capture Compression Total Plant Cost ($/kwe) 1,549 2,895 1,575 2, ,172 Capital COE ( /kwh) Variable COE ( /kwh) TS&M COE ( /kwh) Total COE 2 ( /kwh) Increase in COE (%) $/tonne Avoided Total Plant Capital Cost (Includes contingencies and engineering fees) 2 January 2007 Dollars, 85% Capacity Factor, 16.4% (no capture) 17.5% (capture) Capital Charge Factor, Coal cost $1.80/10 6 Btu, Natural Gas cost $6.75/10 6 Btu 46