Science & Technology Needs for Hydropower
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- Darren Bryant
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1 Science & Technology Needs for Hydropower Brennan T. Smith Program Manager Wind and Water Power Technologies Oak Ridge National Laboratory RNRF Congress on Assessing America's Renewable Energy Future Dallas Peck Memorial Auditorium U.S. Geological Survey Center Reston, Virginia December 8-9, 2009
2 New Resource Assessments are becoming available Existing Hydropower assets are a mix of federal and non-federal projects. Number of Projects Number of Units Total Capacity (GW) Average Project Size (MW) Average Units per Project Average Unit Size (MW) Corps of Engineers Bureau of Reclamation TVA Total Federal FERC Licenses * 1012 n/a n/a n/a FERC Exemptions 595 n/a n/a n/a Total Nonfederal *
3 Technically feasible resources are larger than previously considered New estimates have not been screened yet for costs or environmental issues New technologies can overcome (some of) those challenges
4 Hydropower Science and Technology Themes Unresolved Environmental Science Fish response to hydropower systems Ecosystem response to flow releases Hydropower in Electric Power Systems and Markets Capability and value of hydropower for grid services Holistic Decision Support Systems for Hydropower Multiple objectives and horizons for scheduling and planning Joint variability of hydro and intermittent renewables Hydropower Machine Technology Pumped storage construction costs, variable speed technology Smaller hydro technologies
5 Ecological Optimization: Chinook Salmon Model Water volume attributes: % pool vs. riffle number of predators number of overlapping spawners number of larger Chinook competitors weighted usable area temperature and flow 140 )3 Spawning Upmigration of adults WINTER high-temperature redd mortality FALL flow Jun Apr m it (h none 1392lim low 979 F 489 Feb 245 3/y) Dec 122 Snowmelt increases flow premature outmigration temperature Decreasing Temperature 80 Emergence of offspring low-temperature redd mortality redd scouring or dewatering 100 Optimal flow (hm Rearing of offspring, in redds as eggs in alevins 120 high-temperature juvenile mortality SPRING Increasing temperature Outmigration of smolts Oct
6 Advanced Scheduling for Environmental Targets Examples of constraints Modeling (and scheduling/planning) components Increasing complexity, uncertainty, data requirements, knowledge gaps, and modeling costs Reservoir health index criteria (IBI, RFAI, etc.) Fish passage and survival TMDLs and WQ criteria Scour thresholds Dam safety and flood risk Max/min elevations Max/min generation Level 4 Level 1 Level 2 Level 3 Ecological community dynamics and species interactions Species abundance Habitat, biomass, and population dynamics, behavioral models Availability of food, energy, and habitat Fluvial dynamics models Water quality models Habitat distribution models Flow dynamics and wetted area distribution Water control infrastructure Hydraulic routing models Water balance models Energy production models Specific Objectives Specific Objectives Values (weightings) and/or priorities Sustainable Operations
7 New technologies have been developed to improve performance Fish-friendly turbines Aerating turbines Reregulating weirs Siphon designs Automated controls Fish Survival (%) What are the tradeoffs? other runner designs??? 1 st Wanapum Energy Increase (%) 6/11/2008
8 Energy-Water-Use Optimization Hydrologic Forecasting Enhancements Unit and Plant Optimization Improvements Optimization Toolbox Demonstration & Deployment Dynamic Systems Modeling of Energy-Water- Environment Tradeoffs Optimization Toolbox Development Hydro-System Scheduling Enhancements Hydropower Best Practices Assessment (with industry partners) Hydrologic Forecasting Enhancement Asset Scheduling Enhancements Unit and Plant Optimization Environmental Improvement Hydropower Energy Increase Baseline Assessment Hydropower Flexibility Impacts O & M Cost Impacts
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