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Renewable Resource Update
Renewable Resource Update APPA 2006 Engineering and Operations Technical Conference Neil Kennebeck, Director, Planning Services Dairyland Power Cooperative Why Renewable Energy ? Driven by state and federal requirements and laws Need for energy independence, i.e. to reduce foreign oil needs Need to reduce emissions of all kinds Fear of “global warming” CO2 and CH4 are bad guys Downtown Minneapolis 25,000 Years Ago State Requirements Wisconsin Renewable Portfolio Standard (RPS) 2001 0.5% of retail energy sales must be renewable 2003 0.85 % 2005 1.20 % 2006 use 2004 as baseline and add 2% by 2010 and 4% more by 2015 Intention is for state to achieve 10% not individual utilities ( a mess) Minnesota 2005 1 % add 1% per year to 10 % by 2015 (target) Iowa Electric utilities must offer alternative energy that allows customers to participate voluntarily, but waives Iowa co-ops receiving power under an all requirements contract from an out of state supplier. Illinois 2% 2007 3% 2008 4% 2009 5% 2010 6% 2011 7% 2012 8% 2013 75% of all renewables must come from wind Dairyland’s Renewable Plan Goal: Exceed currently mandated requirements Target early development of renewables at or below the cost of new coal, i.e 4.5-5.0 cents/kWh Expect long term requirements and costs to rise substantially, expect government to be naïve Being long early may mitigate long term risks of price and availability Dairyland’s Existing Renewable Generation Existing Renewables Hydro 23 MW of hydroelectric outside Ladysmith, Wisconsin ~63,000 MWh per year Maximize the use of the FHS offsets coal generation and its emissions Dairyland’s Existing Renewable Generation Dairyland’s Existing Renewable Generation Wind 660 kW outside Chandler, MN 17,400 kW from McNeilus outside Adams, MN Minnesota wind will produce 55,400 MWh/year huge hot wind in Madison, WI and St Paul, MN very difficult to harvest for beneficial use Dairyland’s Existing Renewable Generation Dairyland’s Existing Renewable Generation Dairyland’s Existing Renewable Landfill Gas Generation Elk Mound, Wi 3.0 MW Lake Mills, Iowa 4.8 MW Bruce, Wi 3.2 MW These will produce nearly 93,000 MWh, enough for 9,300 homes DPC’s Plan for New Renewable Resources Wind DPC will add 6-10 MW of new wind in next 14 months May take power from existing turbines at Adams Mn May take power from 5 new 2 MW turbines with 100 meter rotors at Adams Uncertainty is due to restricted availability/long lead times on new wind turbines DPC’s Plan for New Renewable Resources Landfill Gas Additions and Expansions DPC has identified one new landfill and expansions Sarona Wisconsin, 3.2 MW-with future expansion potential Bruce Wisconsin, 0.8 MW expansion about every other year Lake Mills Iowa, 0.8 MW expansion about every other year 7 Mile Creek, WI will add 1 MW for landfill expansion this year Transmission constraints currently a road block for further development in Wisconsin anywhere north of Eau Claire Contented Cows… A New Fuel Source DPC’s Plan for New Renewable Resources Manure Digesters Target 3 MW/yr x 5 yrs (1000 head herds) Standard design for 1000 head and 750-850 kW Approximately 6,200MWh/farm/year Major portion of DPC distributed generation plan wrestling with generation on distribution lines CO2 mitigation, will offset 36,200 tons CO2/yr per farm: equivalent to planting 1.4 million trees per year Technically, it will also reduce system losses, offsetting coal generation Waste-to-Energy System Characteristics CAPTURED WASTE HEAT Farm Farm Use Use •Farm heat $ offsets • Farm refrigeration $ offsets BIOGAS •Methane captured carbon credits Engine Engine // Generator Generator Set Set ELECTRICITY •Peak production •Long-term contract • ‘Green Tag’ premium CAPTURING ADDED VALUE Anaerobic Waste Manure Digester Filtrate DIGESTED MANURE • NPK mineralized •Odor reduced •Pathogens, weed seeds controlled DeDeWatering Watering •Slightly reduced N • P – 40-60% •Useable for on-farm fertilizer Solids •Bedding (on-farm) - or •Compost / Organic Fertilizer DPC’s Plan for New Renewable Resources Farms to be developed in 2005-6: Wild Rose Dairy (Vernon Electric) LaFarge, WI Five Star Dairy (Dunn Energy) Elk Mound, WI Bach Farms (Taylor Electric) Dorchester, WI Norswiss Farms (Barron Electric) Rice Lake, WI Daley Farm (People’s Cooperative Services) Pine Island, MN After first five we intend to revamp the program to improve cost and efficiency Five Star Dairy Renewable Energy Plan Energy MWh D airyland P ow er C ooperative's R enew able E nergy P rojections 600,000 500,000 D igesters (T argeted) N orswiss D igester D aley D igester Bach D igester W ild R ose D igester Five Star D igester Lake Area LFG T E C entral D isposal LFT G E T im berline T rail LF T G E Seven M ile C reek LF G T E T jaden W ind T urbine C handler W ind Farm M cN eilus W ind F arm Flam beau H ydro Station 400,000 MWh 300,000 200,000 100,000 2005 2006 2007 2008 2009 2010 Year 2011 2012 2013 2014 2015 Dairyland Power Cooperative Renewable Energy MWh and Percentage of Retail Sales MWh 600,000 12.0% 500,000 10.0% 400,000 8.0% 300,000 6.0% 200,000 4.0% 100,000 2.0% - 0.0% 200 5 200 6 200 7 200 8 200 9 201 0 201 1 201 2 201 3 201 4 201 5 Percentage of Retail Sales Environmental Benefits of Renewable Program by 2007 Annual emission reduction equivalent to: Not burning 312,000 tons of coal Not emitting 583,500 tons of CO2 85,000 cars off the road per year Planting 24 million trees Thank You!
