Water – Energy Nexus WETCAT and Climate Change

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Presentation transcript:

Water – Energy Nexus WETCAT and Climate Change DSIWM/Water Use and Efficiency Branch Jim Lin Intro myself, Sr. Engineer, WUE/water saving/energy saving/GHG emissions reduction

Objectives Interconnection of Water – Energy – GHG Emission 19.4% of electricity 30% of (non-power plant) natural Gases Water saving/Energy saving/GHG reduction

Energy Consuming Segments of California’s Water-Use Cycle Source Supply & Conveyance Water Treatment Water Distribution Wastewater Treatment Wastewater Collection Recycled Water Treatment Recycled Water Distribution End Use: Agriculture, Residential, commercial, industrial Discharge Water segments: supply and conveyance, Treatment/distribution, End users, wastewater CPUC (2010)

Embedded Energy (energy use by water and wastewater agencies) Focus of Study 1: Wholesale Water Systems Source Focus of Study 2: Retail Water & Wastewater Systems End-Use Energy Supply & Water Treatment Water Distribution Conveyance (312 GWh ) (1,000 GWh ) (15,958 GWh) Water End Uses: Agriculture, Recycled Water Recycled Water Residential, Treatment Distribution commercial, industrial (~30,000 GWh ) Energy embedded in water at each segments: 32% in supply and conveyance, 61% in end users, 3% in treatment/distribution, 4% in wastewater treatment. Wastewater Wastewater Discharge Treatment Collection (2,012 GWh ) Source CPUC (2010)

CAT Climate Action Team Governor’s EO S-3-05 on June 1, 2005 Secretary of CalEPA - Coordinator 18 State Agencies (ARB, CEC, CPUC, NRA, DWR, etc.) 9 Working Groups Goals – GHG Emission Reduction Strategies CAT Climate Action Team CAT was formed after Gov. EO in 2005, 18 agencies and 9 working groups now, Goals – GHG emissions reduction to 1990 level by 2020.

9 CAT Working Groups Agriculture Biodiversity Coastal/Oceans Forestry Land Use Public Health Research State Gov. Water/Energy or WETCAT Emphasize WETCAT

WETCAT Water Energy Team of Climate Action Team Help CARB in Developing AB 32 Scoping Plan, etc. Six GHG Emission Reduction Measures in Water W-1 Water Use Efficiency W-2 Water Recycling W-3 Water System Energy Efficiency W-4 Reuse Urban Runoff W-5 Increase Renewable Energy Production W-6 Public Goods Charge for Water Water sector, six measures to help achieve AB 32 W.S.P. WUE, WR EE, RE Urban Runoff reuse, PGCs

Water Use & Efficiency in DWR Work on grant-funded Projects Evaluation of Water Saving (AF/Yr.) Evaluation of Energy Saving (MWh/Yr.) Evaluation of GHG emission Reduction (Metric Ton CO2e/Yr.) WUE in Urban, Ag., and CII

WUE Example 1: Central Basin MWD Low Flow Toilet Replacement Water Savings: 38 GPD per toilet; 7600 GPD for 200 toilets; Total Water Savings: 8.5 AF/Yr. Urban water use, toilets, from 7 gal/flush to 5, 3.5 and to 1.28 HET – High Efficient Toilets

WUE Example 1: Central Basin MWD Low Flow Toliet Replacement Energy Savings: Total Dynamic Head of GW: 331 ft (101 m, S. CA) Volume of Water Saving: 10,493 Cubic-Meters Pump Efficiency: 0.6 Additional Water Treatment Cost: 20% Energy Savings: 5.77 MWh (~ $ 700 / Yr.) GHG Emission Reduction: 2.61 MTon CO2e/Yr. Detail calculations for those who want to check

Example 2: Water Recycle (IEUA, Chino Basin) Recycled water is used for landscape irrigation Water Saving: 13,167 AFY (Energy Intensity: 2,657 KWh/AF) Energy Saving: 34,985 MWh/Yr. (Nonbaseload Emission Rate: 0.452 MTCO2e/MWh) CO2 Emission Reduction: 15,813 MTCO2e/Yr. This is like to idle 3,163 passenger cars off road (12,000 miles/yr., 20.8 gal/mile, 8.81 kg/gal of gasoline) (5 MTCO2e/car/year) Example 2, water/energy savings, GHG reduction, 5 ton CO2 per car

Water Saving Analysis (38 Prop 50 Projects) Water Saving (AF/Yr.) 14,419 Project Life (Year) 10 Grant Amount ($) 12,376,198 Grant Cost of Water ($/AF) 86 Project Total Cost ($) 39,463,200 Total Cost of Water ($/AF) 274 Bond Accountability required;

Pricing of SWP Water (2012, in $/AF) Grant Funded Water Proj. 86 San Joaquin Valley 52 Southern Cal. 284 Central Coastal 1,408 State Average 185 Favorable in pricing w.r.t. SWP prices

Sources for GHG Calculations www.epa.gov/eGRID eGRID – Emission and Generation Resources Integrated Data (eGRID2012 ver. 1.1; 2009 data) www.climateregistry.org CARROT – Climate Action Registry Reporting Online Tool www.theclimateregistry.org North America GHG Reporting and Evaluation Website www.climatechange.water.ca.gov DWR Climate Change Webpage http://www.epa.gov/climatechange/emissions/ind_calculator.html USEPA Household Emission Calculator Read Project Objective Statement From Project Charter Project Mgmt Docs, Including Charter, RACI, PMP, Comm Plan, Scope DSIWM/Water Use and Efficiency Branch Jim Lin jllin@water.ca.gov

Ever Wonder How Much GHG You Create? www.PGE.com/microsite/calculator/calc1.jsp Utility Bill Electricity Usage Natural Gas Usage Travel mileage