Community Energy Independence Initiative Demonstration Project March 14, 2006
A City-wide Program that integrates: Comprehensive energy efficiency Optimal solar potential of rooftops Distributed generation where appropriate (e.g. microturbines, fuel cells) Provides greater consumer and City control over costs Enhances electric reliability Reduces greenhouse gas emissions Achieves Sustainable City Plan goals Potential to create “Net-Zero” Energy City What is the Community Energy Independence Initiative?
Solar Potential Analysis – Ensure Roof Compatibility Determine roof type (validated with on-site survey) Examples: _ Tile _ Asphalt Shingle _ Composite _ Tar and Gravel
Solar Potential – Roof Area Determination Measure dimensions of roof from aerial 400 + 2,800 = 3,200 sf
Solar Potential – Roof Area Determination Measure dimensions of roof from aerial Estimate shaded portion (%) 35%
Solar Potential – Roof Area Determination Measure dimensions of roof from aerial Estimate shaded portion (%) Estimate obstructed area (%) 40%
Solar Potential – Roof Area Determination Measure dimensions of roof from aerial Estimate shaded portion (%) Estimate obstructed area (%) Account for roof type __ Tile __ Asphalt Shingle __ Composite __ Tar and Gravel Example: 3,200 sf - 35% - 40% = 800 sf
Solar Study Results 24 million sq.ft. total usable roof area for solar 103 MW capacity potential from solar photovoltaics 350,000 sq.ft. of solar thermal for pool heating and commercial heating needs Ability to estimate any building’s solar potential
Solar Survey Results Interviewed more than 250 property owners Considerable support for investing in cost- effective, integrated energy systems City should fill the role of program facilitator
Energy Efficiency Potential: Overall savings of 38% in electricity Overall savings of 34% in gas consumption Solar Potential: Distributed Generation: CEII Program Potential 103 MW peak electric (69% of total peak) 350,000 sq.ft. of solar thermal 41 MW of DG electric capacity w/ heat recovery
Citywide Potential for Reduction in Electricity Peak Generation Need * In this case all electricity is generated within the city on a net basis, which means we will still be using natural gas for distributed generation.
Environmental Benefits of CEII Greenhouse gas (CO 2 ) reduction Smog (NO X ) reduction Building Quality Improvements Reduced need for centralized power plants
CO 2 Emissions Reductions (Stationary Sources) Electricity Gas Heat
Economic Benefits of CEII Most energy savings remain in community Increased property value Potential job creation Business retention and attraction
Two-year CEII Demonstration Project Install integrated energy systems in 50 residential, commercial, and municipal buildings Prepare implementation plan for Community- wide CEII Develop website/marketing plan for Community-wide CEII Revise City code to facilitate permitting of CEII projects Develop business model and financing plan for Community-wide CEII