Resources and Energy Management at IEUA s Regional Water Recycling Plant No. 1 SCAP Energy Management Committee Meeting February 28, 2013 Jason Marseilles Senior Operations Assistant Inland Empire Utilities Agency
Presentation Summary PART I Agency Energy Background PART II RP-1 Operations During Fuel Cell Construction PART III RP-1 Operations During Fuel Cell Commercial Operation
PART I Agency Energy Background PART II RP-1 Operations During Fuel Cell Construction PART III RP-1 Operations During Fuel Cell Commercial Operation
IEUA Service area Wastewater RP-1: 44 MGD CCWRF: 11.4 MGD RP-4: 14 MGD RP-5: 15 MGD Composting IERCF: 410 W.T./day Biosolids RP-1: 475 KGPD RP-2: 150 KGPD
IEUA recycled water system 930/800 RP-1 RWPS* 1050 1158 26 MGD 127 TDH 10.5 MGD 254 TDH 16 MGD 347 TDH CCWRF RWPS 930/800 10 MGD 300 TDH RP-4 RWPS 1158 39 MGD 69 TDH 1299 40 MGD 208 TDH RP-5 RWPS 800 * RWPS Recycled Water Pump Stations 12 MGD 266 TDH
IEUA recycled water system 930/800 RP-1 RWPS* 1050 1158 26 MGD 127 TDH 10.5 MGD 254 TDH 16 MGD 347 TDH CCWRF RWPS 930/800 10 MGD 300 TDH RP-4 RWPS 1158 39 MGD 69 TDH 1299 40 MGD 208 TDH RP-5 RWPS 800 * RWPS Recycled Water Pump Stations 12 MGD 266 TDH
Facility Energy Schematic Energy Production Treatment Facility Recycled Water Constant Power Demand Variable Power Demand (Daily/Seasonal) Facility Facility Power RW Power (Low Demand) RW Power (Avg. Demand) RW Power (High Demand) RP-1 2,493 kw 0 kw 1,171 kw 2,431 kw CCWRF 713 kw 0 kw 149 kw 596 kw RP-4 824 kw 260 kw 574 kw 1,331 kw RP-5 1,290 kw 0 kw 0 kw 537 kw
energy management plan Cost Containment IEUA energy costs account for more than 50% of non-labor expenses Operational Reliability Reduced dependence on imported power supplies Key Drivers Rate Stabilization Hedge against energy rate hikes and market volatility Budget and planning Regulatory/Environmental Meet AQMD standards (1110.2) Reduce carbon footprint
Peak power independence No Peak Power Import by 2020 Maximizing renewable energy generation Optimizing use of IEUA biogas Matching renewable energy generation with peak demands Optimizing energy conservation and efficiency Successfully leveraging available financial incentives Pursuing legislative support for renewable energy
Solar Initiative RP-1: 1.0 MW CCWRF: 600 kw RP-5: 1.0 MW IERCF: 1.0 MW
Power (kw) Power (kw) Rp-4 Wind turbine RP-4 Wind Turbine Power Production 1500 1250 1000 750 500 250 0 0:00 6:00 12:00 18:00 0:00 1500 1250 1000 750 500 250 0 6:00 7:00
Summer Peak Load (kw) Plan to Power Independence 15,000 12,000 Conservation / Efficiency Fuel Cell 9,000 Wind 6,000 Solar 3,000 Purchased from Grid Food Waste to Energy 0 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
Power (kw) 2012 average power sources 12,000 10,000 19% Renewable 8,000 6,000 4,000 27% 7% 2,000 83% 17% 16% 0 Agency RP-1 RP-2 CCWRF RP-4 & IERCF RP-5 Grid Cogen Solar Fuel Cell Wind
PART I Agency Energy Background PART II RP-1 Operations During Fuel Cell Construction PART III RP-1 Operations During Fuel Cell Commercial Operation
Fuel Cell Project Schedule 2008 August Rule 1110.2 November Feasibility Study 2010 October PPA with UTS 2012 January Electrical Shutdown June SCE Interconnection Agreement June Start up 2008 2009 2010 2011 2012 2013 2009 April RFP RP-1, RP-2, RP-5 SHF October RFP RP-1 2011 July Design Complete September AQMD Permit October Mechanical Shutdown December Fuel Cell Delivery SCE Application 2013 January Commissioning
Digestion before Fuel Cell Thermophilic 2 nd Phase 55% Thermophilic 3 rd Phase Mesophilic Acid Phase 80% Mesophilic 2 nd Phase 25% Mesophilic 3 rd Phase Raw Sludge (Gravity Thickener & DAFT) Mesophilic Single Stage 20%
RP-1 Digester Gas System 2011 Digestion Plant Compressor Blower FC Compressor Flare Cogen Boiler Fuel Cell
Fuel Cell construction shutdowns Mechanical Shutdown Relocation of DG Storage Tank FC Compressor Tie-in 3 Week Shutdown of Cogen and Boiler Operation on DG Electrical Shutdown Installation of Wire for FC/Cogen Kirk Key Breaker Installation of H11 Breaker 8 hour Electrical Shutdown of RP-1 1 Week Shutdown of Cogen
DG System during shutdowns Digestion Plant Compressor Blower FC Compressor Flare Cogen Boiler Fuel Cell
Digestion process upset
Digestion process upset Upset Normal
Digestion For Fuel Cell Construction Raw Sludge (Gravity Thickener & DAFT) Mesophilic Single Stage 13% Mesophilic Single Stage 12% Mesophilic Single Stage 12% Mesophilic Single Stage 18% Mesophilic Single Stage 22% Mesophilic Single Stage 23% 33% Primary Sludge to RP-5
Gas Production (SCFD) Gas Production (SCFD) Digestion Gas production 1,000,000 900,000 800,000 700,000 Mechanical Shutdown 600,000 500,000 400,000 300,000 200,000 100,000 800,000 700,000 600,000 500,000 400,000 300,000 200,000 100,000 0 10/1 10/8 10/15 10/22 10/29 Electrical Shutdown 0 1/1/11 7/3/11 1/2/12 7/3/12
PART I Agency Energy Background PART II RP-1 Operations During Fuel Cell Construction PART III RP-1 Operations During Fuel Cell Commercial Operation
RP-1 Fuel Cell Commercial Operation 1/1/2013 Fuel Cell Energy DFC3000 Gross Power Output = 2,800 kw Net Power Output = 2,650 kw Heat Recovery System 4.2 MMBTU/hr Digester Gas Treatment 600 scfm
Current Digestion Process Thermophilic 2 nd Phase 44% Thermophilic 3 rd Phase Raw Sludge (Gravity Thickener & DAFT) Mesophilic Acid Phase 100% Thermophilic 2 nd Phase 34% Thermophilic 3 rd Phase Thermophilic 2 nd Phase 22% Thermophilic 3 rd Phase
RP-1 Digester Gas System current Digestion Plant Compressor Blower FC Compressor Flare Cogen Boiler Fuel Cell
Power (kw) Energy management 4,000 3,000 Utility Import Min. Peak Solar Influenced by GWR Demand 1158 RWPS 3 Pumps 2 Pumps 1 Pump 1050 RWPS 930 RWPS 2,000 Fuel Cell RP-1 Treatment Facility 1,000 0 Power Production Power Demand
Power (kw) Gas Consumption (scfm) Fuel Cell operation - February 3,000 600 2,500 500 2,000 400 1,500 300 1,000 200 500 100 0 0 2/1 2/8 2/15 2/22 3/1 Net Power Natural Gas Digester Gas
Digester Gas Consumption (scfm) 800 Digester gas management 700 600 500 400 300 200 100 0 1/1 1/8 1/15 1/22 1/29 2/5 2/12 2/19 2/26 Fuel Cell DG Boiler DG Flare Fuel Cell + Boiler on DG
Next Steps Complete Boiler/Blower Automation Automated selection between DG/NG based upon availability Will increase digester gas utilization Flare Upgrade and Gas Loop Pressure Control Provide increased capacity for flare system Provide increased control of gas loop pressures Load Bank to Load Leveler Conversion Maximize power received from fuel cell Maintain stable operation of fuel cell
Questions?