energy & emissions strategic plan ewa’s roadmap to energy independence
TRANSCRIPT
Energy & Emissions Strategic Plan
EWA’s Roadmap to Energy Independence
Objectives
Describe EWA
Set the context for EWA’s planning process
Discuss the importance of Board leadership
Planning Goals, Process, Results\
Big Picture Outcomes
Q&A?
15 minutes
Encina Wastewater Authority
Carlsbad, California
Joint Powers Agency
350,000 Residents
125 Sq. Mile Service Area
$350M Asset Value
Encina Water Pollution Control Facility
Contract O & M
Regional Source Control
Regional Laboratory
Encina Water Pollution Control Facility
Context
High energy demand
High energy costs
Unfavorable tariff environment
Future energy markets unstable beyond local control
Early investment & adoption
WASTEWATER
Legacy Cogeneration Investment
Investment
Engines
Generators Blowers Digester Heat
Phase III 5 3-350 kWh 2-350kWh 100%
Phase IV 5 3-350 kWh 2-350 kWh 100%
Phase V 4 4-750 kWh 5 – In Array 100%
Board Strategic Policy
MissionAs an environmental leader, EWA provides
sustainable and fiscally responsible wastewater services to the communities it serves while maximizing the use of alternative and renewable resources.
Key IssueAdditional resource recovery and investment
creates the opportunity for energy independence mitigate impacts arising from unstable energy markets.
Planning Goals
1. Energy Efficiency Goal Review existing energy consumption and evaluate
alternative methods to reduce consumption
2. Energy Production Goal ID and evaluate technologies for increasing on-site
energy production fueled by alternative or renewable fuels
3. Emissions Permitting Goal Evaluate alternative emissions and permitting models in
the context of energy demand & production strategies
4. Planning Goal Recommend specific actions.
Planning Process
Current and projected future baseline
Identify energy efficiency measures (EEM)
Comprehensive technology scan & comparison
Rank technologies using defined evaluative criteria
Develop an implementation plan
Planning Results
Energy Efficiency Goal: Review existing energy consumption and evaluate alternative methods to reduce consumption
Baseline annual electric demand 17,500,000 kWh
Secondary Treatment process = 43% of electric demand, Target: 9 EEMs, 2,000,000 kWh annual demand reduction Aeration Header Repair Turbo Blowers Process Operation Changes Variable Speed Fans & Pumps
Planning Results
Electrical Energy Production Goal: ID and evaluate technologies for increasing on-site energy production fueled by alternative or renewable fuels.
Screened In IC Engines, Fuel Cells, PV Solar
Screened Out Wind Turbines, Microturbines, Water Flow Energy
Capture
Planning Results
Bio-Gas Energy Production Goal: ID and evaluate technologies for increasing on-site energy production fueled by alternative or renewable fuels.
Screened In Alternative Fuels, Cell Lysis, Digester Enhancements,
Bio-Gas Treatment
Screened Out Sludge Heating, Bio-Gas Storage
Planning Results
Waste-Heat Energy Production Goal: ID and evaluate technologies for increasing on-site energy production fueled by alternative or renewable fuels.
Screened In Absorption & Adsorption Chiller, Organic Rankine Cycle
Screened Out Steam Turbines, Solids Pyrolysis
Planning Results
Emissions Permitting Goal: Evaluate alternative emissions and permitting models in the context of energy demand & production strategies
Screened In Synthetic Minor
Screened Out Title V
Recommended Project Summary
Element Est. $ ROI in Yrs
Priority
EEMs 2.3M 0.2-25 1/1
Alternative Fuel 2.0M 2.5 3/2
Gas Treatment & Exhaust Catalysts
3.0M 2.5 2/3
5th IC Engine 1.0M 2.8 4/4
Renewable Fuel Chiller 1.4M 6.4 5/5
6th IC Engine 3.1M 24 6/6
Planning Outcomes
Appropriate response to public’s growing recognition of the water-energy nexus
Good planning is a condition precedent to investment
Energy efficiency is nearly universally viewed as the most appropriate 1st investment
Sustained Board of Director’s commitment to energy independence since 2008
Value of thoughtful resource deployment and branded communication
