Orange. County. Reclamation Plant No. 1 Treatment Plant No. 2. La Habra Brea. Fullerton Placentia Anaheim Villa Park Alamitos.

Transcription

1 Energy Management

2 OCSD Service Area 572 miles of sewers 471 square miles 200 million gallons per day 2.5 million population 20 cities, 4 special districts 15 pumping stations 2 treatment plants Pacific Ocean Reclamation Plant No. 1 Treatment Plant No. 2 Buena Park La Palma Cypress La Habra Brea Fullerton Placentia Anaheim Villa Park Los Stanton Alamitos Orange Garden Grove Seal Westminster Beach Santa Ana Fountain Tustin Valley Huntington Beach Costa Mesa Ocean Pipeline Newport Beach Irvine Yorba Linda Anaheim Orange County

3 Water Resource Recovery Preliminary Treatment Primary Treatment Secondary Treatment Influent Reclaim/ Effluent Solids Reuse Solids Processing Solids Dewatering Heat Digesters Digester Gas Energy to Plant Central Power Generation System Engines

4 MW Total Generation Estimated Generation Total Plant Load Estimated Plant Load

5 2,300 Total Influent Power Efficiency (kwh/mgd) 2,100 1,900 1,700 1,500 1,300 P1 Energy Efficiency P2 Energy Efficiency 1, Jul' 05 Oct Jan'06 Apr Jul' 06 Oct Jan'07 Apr Jul' 07 Oct Jan'08 Apr Jul' 08 Oct Jan'09 Apr Jul' 09 Oct Jan'10 Apr Jul'10 Oct Jan'11 Apr Jul'11 Oct Jan'12 Apr Jul'12 Oct Jan'13 Apr Jul'13 Oct Jan'14 Apr

6 Industry s Best Practices Know how energy is being used Know what you are paying Understand the onsite energy generation Build efficiency into new projects Participate in Edison (SCE) efficiency programs Monitor alternative energy opportunities

7 Energy Utilization Power Monitoring System at Each Plant Monthly electric, gas and heat data collected and analyzed Energy used by each process is estimated annually Used for cost allocations and economic analyses of alternate processes Used as baseline for efficiency projects

8 Energy Utilization Power Monitoring (cont d) System at Each Plant Identifies opportunities for energy savings Energy info is made available to Operations staff to optimize use Time of day price variations Impact of taking equipment out of service

9 Know What You Are Paying Bills are Analyzed for Accuracy Credit for $25 K (SCE meter failure) SCE credit for $73,000 for standby tariff appeal We understand the tariffs / energy markets Operation during Peak hours Meet with utility reps quarterly

10 Onsite Energy Management Produce 11 MW of Electricity Recover 1.3 M Therms Heat Saved Electricity $ 483,000 Natural Gas $ 510,000 $ 993,000 Annually

11 J-111 Project: Cengen Engines Emissions Reduction 2-Step Catalytic System Chemical Injection Digester Gas Treatment CO Removal Catalyst NOx Removal Catalyst

12 Build Efficiency into New Projects Ultra Premium efficiency motors Use of variable speed motor controllers High efficiency lighting including LED Multi-level lighting Optimize pumping & blower applications to maximize efficiency

13 Participate in SCE Efficiency Programs Savings by design $193,000 received for three projects SCE Pump testing and optimization program Energy conservation review - Currently TEN (The Energy Network) and Lincus

14 Alternative Energy Opportunities Digester Gas as Renewable Fuel AB32 implementation - GHG emissions reduced to 1990 levels by 2020 Use gas, get credits for renewable energy Clean and sell gas Sell renewable energy credits DG export requires Natural Gas to heat digesters to produce DG

15 Alternative Energy Opportunities Solar Energy Limited availability of open land and roof space 1 megawatt requires 5 acres Cost and benefit 1 megawatt = $5 million, payback 15 years Power purchase agreements are Net Metered Variable output based on season & weather Energy Storage coming into use

16 Alternative Energy Opportunities Fuel Cells Emerging technology Low emissions High cost 1 MW = $5.2 million + $300K / yr More electrical efficiency than engines; less heat output means boiler heat required for digesters Should be constant-loaded; abrupt load changes & shutdowns shorten cell life

17 Renewable H 2 Energy Station Treatment Plant Solids Treatme nt Heat (future) Power Biogas Heat (Future) Digesters Natural gas (backup) Fuel Cell Hydrogen Fueling Station Efficiency: Target (electricity + H 2 ) 50% Measured (electricity + H 2 ) 53.2% (July 2011) Measured (incl. heat value) >70%

18 What s In The Future Digestion alternatives Increase gas production Technology: Cambi, aquacritox, and others Supplemental fuels Monitor fuel cell and solar advancements

19 Partnerships Matter Federal/state government DOE, USBR, EPA, DWR, CARB, and OCWD Private sector Utilities

20 Questions? Umesh Murthy Orange County Sanitation District