renewable energy technology overview
DESCRIPTION
Overview of the renewable energy technologies, how they work, key issues, key advantagesTRANSCRIPT
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Renewable Energy Technology Overview
July 3, 2010
by: Ron Miller, P.E.
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Solar Energy
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Photovoltaic (PV)
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U.S. Solar Resources
Source: NREL
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Alamosa 8.2 MW PV Plant
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Alamosa 8.2 MW PV Plant
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PV Data
• 1 megawatt (MW) per 10 acres
• Installed price $5M – 7M/ MW
• 1 MW of PV capacity produces 1,500-2,100 megawatt-hour (MWh) per year in energy
• 1 MW PV provide average annual energy for 200-280 Colorado homes
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Different PV Applications
• Fixed – stationary on rooftop or ground-mounted
• Single-axis tracking – tracks sun from east to west during day, more kWh than fixed
• Double-axis tracking – tracks sun from east to west daily and seasonally north/south, more kWh than single-axis
• Concentrating PV – lens on PV panel to intensify the sun’s brightness
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Alamosa 8.2 MW PV Plant
Double-axis tracking PV Single-axis tracking PV
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Market Factors
• Oversupply dynamic emerged in 2009 due to polysilicon production capacity increase and recession
• Industry consolidation over next few years
• Demand growth forecasted 38% for 2009, 59% in 2010 per Deutsche Bank
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Projected U.S. PV Installations
Tremendous growth in U.S. PV installations, with more projected through 2025
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PV Projected Price Decline2007-2025 (cents/kWh)
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PV Project Size Increasing
3 large Colorado PV projects - Denver International Airport 2 MW ground-mounted PV, August, 2008
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Top 10 Solar Utilities
Xcel Energy (Public Service) 5th place of solar utilities; strong California and Nevada presence
Source: Solar Electric Power Association
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Large Solar Utility Announcements
Source: Solar Electric Power Association
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Concentrated Solar Power (CSP), Solar Thermal, or Solar Trough
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CSP Data
• 250 MW per 1,600 acres (1 MW per 6.5 acres)
• 250 MW with 3-hour storage per 2,000 acres
• Installed price $3.0M to $4.0M per MW
• 1 MW of CSP capacity produces 3,200 MWhper year in energy
• 1 MW CSP provide average annual energy for 425 Colorado homes
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CSP Process Flow
Similar to conventional generation plants, except solar provides heat to make steam for turbine generator
Source: NREL
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CSP Collector Components
Absorber pipe receives heat from parabolic reflector, heating synthetic oil to 700-800 degrees F.
Source: NREL
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CSP Collector Operation
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Solar Collector Operation
Synthetic oil is circulated through solar collector to make steam for turbine generator
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CSP Power Plant Components
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Andasol 1 & 2 - Spain
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Nevada Solar One
64 MW Trough plant built for Nevada Power in Boulder City, NV
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CSP Growth Projection
CSP growth projected to 43,000 MW by 2025; water rights for cooling water could be governing factor
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CSP Price Ranges 2007-2025
Total capital investment $53 billion
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CSP Players
• Flagsol (part of Solar Millennium)
• Solel Solar Systems
• Acciona Solar Power (was Solargenix)
• Sener / ACS Cobra
• Solucar R&D (part of Abengoa)
• IST Solucar (part of Abengoa)
• Ausra
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CSP Price Trends
• With full 30% ITC available, costs for “next” projects in SW US will be $130 -$150/MWh
• Costs in the $100 -$120/MWh are expected by the end of this decade for large scale projects
• R&D and other “efficiencies” will drop costs to below $100/MWh
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CSP Advantages / Trends
• Storage of energy (heat) addresses peak energy, growing faster than base demand
• Reduces need for expensive, under-utilized gas peaking plants
• Applicability in tandem with combined cycle combustion turbine operations
• Economies of scale driving unit cost down, as typical projects are 100 – 500 MW range
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CSP Advantages / Trends
• Technology advances in primary loop medium increasing temperature by 100 degrees F - higher energy production
• Demonstrated plant reliability beyond 20 years, lower Levelized Cost Of Energy (LCOE) by about 1.5 cents/kWh
• CSP market in the SW US can grow to 1-
2 GW per year
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CSP Market for CSP in SW US
• Arizona: 2,000 MW
• Nevada: 1,500 MW
• New Mexico/West Texas: 1,000 + MW
• Colorado: 500 MW after 2010
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Wind Energy
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Wind Turbines
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How Do Wind Turbines Work?
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U.S. Wind Resources
Source: NREL
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Wind Energy Statistics
• U.S. passed Germany in 2008 as #1 wind producer in world at 25,170 MW
• U.S. wind power capacity surged by 39% in 2009, with 9,922 MW added, after record-breaking 2008 with 8,358 MW
• Achieved in two years what had previously taken 2 decades (the 10,000-MW mark reached in 2006)
• Current capacity of 35,159 MW
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Trends
• Wind power contributed 42% of all new U.S. electric generating capacity in 2008
• U.S. wind turbine manufacturing expanded; now >50% components made domestically
• Average turbine size continued to grow
• Developer consolidation continues
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Trends, cont’d.
• Project cost increases as a function of turbine prices, and turbine prices have increased dramatically
• Solutions to transmission barriers emerging, but constraints remain
• Installed project costs continued to rise in 2007/2008, after a long period of decline
• Policy efforts continued to affect the
amount and location of wind development
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Wind Energy Projections
• New starts in 2010 projected to slow
• Top states: Texas, Iowa, California, Washington, Minnesota, Oregon, Illinois
• Upward pressure on wind power prices
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21,000 MW Wind Capacity Impact
• Generate >60 billion kWh in 2009
• Serve over 5.5 million American homes
• Eliminate burning of:
• 30.4 million short tons of coal (enough to fill two 1,000-mile-long coal trains)
• 91 million barrels of oil per year
• 560 billion cubic feet of natural gas (about 9% of the natural gas used for electricity generation)
Source: December 22, 2008 AWEA press release
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Growth In U.S. Wind Power Capacity
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U.S. Overtakes Germany in Wind Capacity in 2008
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U.S. Wind Capacity
Source: AWEA
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U.S. Wind Capacity By State
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Top 20 Wind Utilities
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Wind Turbine Manufacturer’s Share
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U.S. Wind Turbine Installations By Manufacturer
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U.S. Wind Manufacturing Facilities
Source: NREL
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Average Turbine Size Growing
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Wind Farm Size Declined Slightly
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Wind Industry Consolidating
Source: AWEA
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Wind PPA Energy Prices Increasing
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Wind Project Ownership
IPPs own majority of wind projects, but recent legislation allows IOU ownership, which is increasing
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Wind production decreases during peak power demand period; without demand, wind production may be curtailed
Geographic Diversity of Wind
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Biomass Energy
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Biomass Wood / Pellets To Energy
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Microgy’s Biomass to Methane Project, Stephenville, Texas
Source: Environmental Power website
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Biomass Issues / Concerns
• Increasing regulation of agricultural waste and environmental concerns for air/water
• Concentrated animal feeding operations face new costly regulations
• Increasing costs of MSW disposal
• A number of states are implementing a cap and trade system for greenhouse gases
• Federal legislation for more greenhouse standards increased in pace and scope
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Biomass Feedstocks
• Agricultural and forest residues
• Primary and secondary mill residues
• Municipal solid and urban wood waste
• Methane emissions from landfills, manure management, wastewater treatment plants
• Wood-processing residues
• Animal wastes
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Biomass Technologies
• Gasification
• Thermal
• Chemical
• Incineration
• Anaerobic digestion
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Biomass Products
• Electricity
• Heat
• Biogas
• Ethanol
• Biodiesel
• Hydrogen
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Biomass Energy Advantages
• Diversion of waste from landfills, saving transportation costs
• Relatively-high capacity factor (80-90%)
• Distributed generation near energy demand, reducing transmission losses (7-10%)
• Process agricultural wastes to eliminate production of greenhouse gas (GHG)
• Largely carbon-neutral
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Biomass Projects
Source: Environmental Power website
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Biomass Process Overview
Source: Environmental Power website
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Key Success Factors
• Biomass feedstocks in close proximity to generator
• Net metering for full retail rate relief
• Interconnection to grid for export
• State RPS requirements to include biomass to drive urgency
• High utilization rates
• Customer demand for combined heat and power (CHP)
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Hydro
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Hydro
• Hydro static reservoir release
• Hydro pumped storage
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Hydro Static Reservoir Release
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Hydro Static Release - How It Works
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Lower Granite Dam, Snake River
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Key Points
• Power generation depends on flow to reservoir (rate), pressure of water (head)
• Generation can be at odds with dam’s purpose of flood control and seasonal changes
• For highest price for energy produced, power needs to be at peak demand period for utility
• May not be dispatchable to utility
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Key Points, cont’d.
• Access to federal tax credits, accelerated depreciation incentives
• Helps to meet state renewable portfolio standards
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Hydro Pumped Storage (HPS)
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Hydro Pumped Storage - How It Works
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Basic Principle
• Two reservoirs at different elevations and pipeline connecting two is required
• Energy produced when water released from upper to lower reservoir
• Daytime, higher-priced energy produced
• Energy consumed as water pumped back to the upper reservoir
• Night-time, lower-priced energy used
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Advantages
• Quick startup
• Provides demand for wind farm energy production during night-time/off-peak periods, allowing higher wind utilization
• Provides peak energy during periods of excessive demand on the grid system
• HPS not renewable, but enhances wind energy production during off-peak periods
• Dispatchable energy for utility
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HPS ProjectLudington, Michigan
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Questions and Answers
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Contact Information
Ron Miller, P.E.
303-723-5465
303-748-3441 cell
http://www.linkedin.com/in/ronmiller10
“Drivers of the New Renewable Energy Transmission System” CLE Renewable Energy Transmission March 2010 conference available at link above
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Building A Wind Farm
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