Oregon ACWA summer meeting

Transcription

1 Oregon ACWA summer meeting Bend, July Municipalities and Clean Energy Solutions

2 About us Independent nonprofit Serving 1.6 million customers of Portland General Electric, Pacific Power, NW Natural, Cascade Natural Gas and Avista Providing access to affordable energy Generating homegrown, renewable power Building a stronger Oregon and SW Washington

3 Clean and affordable energy since 2002 From Energy Trust s investment of $1.7 billion in utility customer funds: Nearly 680,000 sites transformed into energy efficient, healthy, comfortable and productive homes and businesses 13,000 clean energy systems generating renewable power from the sun, wind, water, geothermal heat and biopower $7.6 billion in savings over time on participant utility bills from their energy-efficiency and solar investments 22.8 million tons of carbon dioxide emissions kept out of our air, equal to removing 4 million cars from our roads for a year 3

4 A clean energy power plant 669 average megawatts saved 127 amw generated 58 million annual therms saved Enough energy to power 678,000 homes and heat 93,000 homes for a year Avoided 22.8 million tons of carbon dioxide 4

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6 The Water Energy Nexus Water and energy are inextricably linked. Two simple, but important concepts: Conserving water reduces energy use and; Virtually any water project is an energy project, and vice versa.

7 Renewable Energy at WRRFs IDEAL locations for Energy Efficiency & Renewable Energy! permanent low cost of capital municipally owned heat and electric load full time staff long term planning Net-metered: off-setting retail power price Key ingredient for project success: energy champion!

8 Evolution of WRRF Services 1 st Generation protect public health o Clean water o Biosolids treatment 2 nd Generation value-added products o Recycled water o Soil amendments o Renewable energy generation (biogas, solar) 3 rd Generation greenhouse gas reduction / sustainably goals o Use existing infrastructure to achieve goals o Efficiency upgrades / Strategic Energy Management / Solar / Biopower o Helping meet municipal climate action goals

9 Bend Climate Action Goals resolution 3044; Sept 2016 City Facilities and Operations: 9

10 Biopower (CHP) at Oregon WRRFs w/ Cogeneration WRRFs Utility Codigest? 2019 Nameplate (kw) 2019 Estimated Generation (MWh) Portland-Columbia WWTP PGE Yes 1,730 12,578 CWS-Durham WWTP PGE Yes 1,696 12,331 Willow Lake (Salem) WPCF PGE No 1,176 7,726 CWS-Rock Creek WWTP PGE No 1,000 7,183 Eugene Springfield OWEB No 800 6,517 Gresham WWTP PGE Yes 790 5,536 Medford WWTP PAC No 750 2,957 WES-Tri-City WPCP PGE No 600 4,205 Pendleton WWTP PAC Yes WES-Kellogg STP PGE No Total 4 8,672 59,209 Homes 5,383 Net generation value $ 2,368,356

11 Biopower potential? Grants Pass Roseburg Klamath Falls (Spring St.) Corvallis Albany Hood River Lincoln City Woodburn Cottage Grove Hermiston Bend

12 The Gresham story Ten-year journey to net-zero energy use 1. Cogen # (395 kw) 2. City Sustainability Plan 2009 (100% RE by 2030) 3. Solar array 2009 (420 kw) 4. FOG Feasibility Study Energy Mngt. Team 2010 (net-zero by 2015) 6. Master Plan update Energy efficiency measures 8. FOG phase 1 (2012) & phase 2 (2014) 9. Cogen # (395 kw)

13 Gresham WRRF - Annual Savings Consumption and Production Net-Exporter City of Gresham WWTP 13

14 Revisit Solar!

15 Solar Incentives Volunteer Ratepayer Funds Blue Sky (PAC) & Renewable Development Fund (PGE) Energy Trust:

16 Energy Trust improving energy management & operational efficiency Project scoping and technical studies Technical assistance Cash incentives for capital upgrades and operations & maintenance improvements Lighting upgrades Equipment rebates Strategic Energy Management

17 Renewable energy incentives they come & go Business Energy Tax Credit (BETC) Biomass Collector Producer Tax Credit ODOE s Combined Heat and Power CHP Tax Credit ODOE s Renewable Energy Development (RED) grant

18 Renewable Energy Headwinds Uncertain energy policy LCFS, RIN market, PTC, ITC Low avoided power prices Loss of key biopower incentives Higher capital costs with strong economy

19 Renewable Energy Tailwinds Significant benefits of net metering / CHP Utility incentives: Blue Sky & Renewable Development Fund Corporate & municipal sustainability goals Regional food waste recovery policies Oregon renewable energy (& carbon?) policy

20 Next Frontier for Renewable Energy at WRRFs? 1. Maximizing on-site generation 2. Co-digestible feedstocks (FOG, food waste) 3. Batteries! Reduce utility demand, transmission, & distribution charges 4. Aggregated net-metering 5. Non condensing backpressure turbines 6. Vehicle charging / fueling

21 Thank you! Dave Moldal, Program Manager

22 Biogas Production Trends 350, , , , , ,000 50,000 0 Biogas (SCF/day) and FOG Injection (Gal/day) Cogen 2 Phase 2B FOG Phase 2A FOG Phase ,000 10,000 8,000 6,000 4,000 2,000 0 Biogas FOG 2014 Gas production up 60%+ from baseline Produced more energy than we consumed in 2015 Flared 20% of biogas production in 2015 (Future project?) City of Gresham WWTP 22

23 Electric Utility Impacts from Energy Trust

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