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2004 DOE Hydrogen, Fuel Cells & Infrastructure Technologies Program Review Presentation COST AND PERFORMANCE ENHANCEMENTS FOR A PEM FUEL CELL TURBOCOMPRESSOR

Description: The objective is to assist the Department of Energy in the development of a low cost, reliable and high performance air compressor/expander. Technical Objective 1: Perform a turbocompressor systems PEM fuel cell trade study to determine the enhanced turbocompressor approach. Technical Objective 2: Using the results from technical objective 1, an enhanced turbocompressor will be fabricated. The design may be modified to match the flow requirements of a selected fuel cell system developer. Techni… more
Date: April 1, 2004
Creator: Gee, Mark K.

2008 B20 Survey Results

Description: Describes results of a sample survey of the quality of B20, a biodiesel blend, collected from U.S. public pumps and fleets as part of a joint effort by NREL, the NBB, and engine manufacturers.
Date: February 2, 2009
Creator: Alleman, T. L. & McCormick, R. L.

2008 Solar Annual Review Meeting, Session: Parabolic Troughs

Description: The project description is R and D activities at NREL and Sandia aimed at lowering the delivered energy cost of parabolic trough collector systems and FOA awards to support industry in trought development. The primary objectives are: (1) support development of near-term parabolic trought technology for central station power generation; (2) support development of next-generation trought fields; and (3) support expansion of US trough industry. The major FY08 activities were: (1) improving reflect… more
Date: April 1, 2008
Creator: Kutscher, Chuck

3D Thermal and Electrochemical Model for Spirally Wound Large Format Lithium-ion Batteries

Description: In many commercial cells, long tabs at both cell sides, leading to uniform potentials along the spiral direction of wound jelly rolls, are rarely seen because of their high manufacturing cost. More often, several metal strips are welded at discrete locations along both current collector foils. With this design, the difference of electrical potentials is easily built up along current collectors in the spiral direction. Hence, the design features of the tabs, such as number, location and size, ca… more
Date: October 14, 2010
Creator: Lee, K. J.; Kim, G. H. & Smith, K.

Accelerating Computation of the Unit Commitment Problem

Description: Production cost models (PCMs) simulate power system operation at hourly (or higher) resolution. While computation times often extend into multiple days, the sequential nature of PCM's makes parallelism difficult. We exploit the persistence of unit commitment decisions to select partition boundaries for simulation horizon decomposition and parallel computation. Partitioned simulations are benchmarked against sequential solutions for optimality and computation time.
Date: October 1, 2013
Creator: Hummon, M.; Barrows, C. & Jones, W.

Accelerating Design of Batteries Using Computer-Aided Engineering Tools

Description: Computer-aided engineering (CAE) is a proven pathway, especially in the automotive industry, to improve performance by resolving the relevant physics in complex systems, shortening the product development design cycle, thus reducing cost, and providing an efficient way to evaluate parameters for robust designs. Academic models include the relevant physics details, but neglect engineering complexities. Industry models include the relevant macroscopic geometry and system conditions, but simplify … more
Date: November 1, 2010
Creator: Pesaran, A.; Kim, G. H. & Smith, K.

Accelerating Development of EV Batteries Through Computer-Aided Engineering

Description: The Department of Energy's Vehicle Technology Program has launched the Computer-Aided Engineering for Automotive Batteries (CAEBAT) project to work with national labs, industry and software venders to develop sophisticated software. As coordinator, NREL has teamed with a number of companies to help improve and accelerate battery design and production. This presentation provides an overview of CAEBAT, including its predictive computer simulation of Li-ion batteries known as the Multi-Scale Multi… more
Date: December 1, 2012
Creator: Pesaran, A.; Kim, G. H.; Smith, K. & Santhanagopalan, S.

Accelerating Fatigue Testing for Cu Ribbon Interconnects

Description: This presentation describes fatigue experiments and discusses dynamic mechanical loading for Cu ribbon interconnects.
Date: May 1, 2013
Creator: Bosco, N.; Silverman, T.; Wohlgemuth , J.; Kurtz, S.; Inoue, M.; Sakurai, K. et al.

Acceleration of Field-Scale Bioreduction of U(VI) in a Shallow Alluvial Aquifer: Temporal and Spatial Evolution of Biogeochemistry

Description: Uranium mill tailings sites provide access to uranium-contaminated groundwater at sites that are shallow and low hazard, making it possible to address the following scientific objectives: (1) Determine the dominant electron accepting processes at field sites with long-term metal/rad contamination; (2) Define the biogeochemical transformations that may be important to either natural or accelerated bioremediation under field conditions; and (3) Examine the potential for using biostimulation (elec… more
Date: April 20, 2005
Creator: Long, Phil

Accounting for the Variation of Driver Aggression in the Simulation of Conventional and Advanced Vehicles

Description: This presentation discusses a method of accounting for realistic levels of driver aggression to higher-level vehicle studies, including the impact of variation in real-world driving characteristics (acceleration and speed) on vehicle energy consumption and different powertrains (e.g., conventionally powered vehicles versus electrified drive vehicles [xEVs]). Aggression variation between drivers can increase fuel consumption by more than 50% or decrease it by more than 20% from average. The norm… more
Date: May 1, 2013
Creator: Neubauer, J. & Wood, E.

Active Power Control from Wind Power

Description: In order to keep the electricity grid stable and the lights on, the power system relies on certain responses from its generating fleet. This presentation evaluates the potential for wind turbines and wind power plants to provide these services and assist the grid during critical times.
Date: April 1, 2011
Creator: Ela, E. & Brooks, D.

Active Power Control Testing at the U.S. National Wind Technology Center (NWTC)

Description: In order to keep the electricity grid stable and the lights on, the power system relies on certain responses from its generating fleet. This presentation evaluates the potential for wind turbines and wind power plants to provide these services and assist the grid during critical times.
Date: January 1, 2011
Creator: Ela, E.
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