ORNL researchers win 7 R&D 100 awards
Scientists and engineers at the Department of Energy's Oak Ridge National Laboratory have received seven R&D 100 Awards presented by R&D Magazine.
These awards, sometimes referred to as the "Academy Awards of Science," honor the 100 most outstanding advances in technology for the year and are chosen by an expert panel of independent judges and the editors of R&D Magazine.
"I want to congratulate this year's R&D 100 award winners," Energy Secretary Steven Chu said. "The Department of Energy's national laboratories and sites are at the forefront of innovation, and it is gratifying to see their work recognized once again. The cutting-edge research and development done in our national labs and facilities is helping to meet our energy challenges, strengthen our national security and enhance our economic competitiveness."
The seven awards bring the total number of R&D 100 awards won by ORNL researchers over the years to 164.
"Winning seven of these prestigious awards is a testimony to the talent and creativity of a remarkable staff," ORNL Director Thom Mason said. "Our researchers do a tremendous job of delivering our mission of scientific discovery and innovation."
ORNL researchers were recognized for the following technologies:
Multiresolution Adaptive Numerical Environment for Scientific Simulations, submitted and developed by ORNL with a team led by Robert Harrison and George Fann with Judith Hill, Diego Galindo and Jun Jia of the Computer Science and Mathematics Division and Rebecca Hartman-Baker of the Oak Ridge Leadership Computing Facility. Harrison is also the director of the Joint Institute for Computational Sciences.
MADNESS is a free open-source general purpose user-friendly numerical framework and software for the development scientific simulations from laptops to massively parallel supercomputers. MADNESS utilizes the latest parallel computing and solution methodologies to solve many dimensional integral and differential equations accurately and precisely for real-world problems. MADNESS provides a new platform for scientists and engineers to easily create new applications with assurance in the exactness of their results. Funding for this project was provided by the DOE Office of Science, the National Science Foundation Office of Cyber Infrastructure and Division of Chemistry, and the Defense Advanced Research Projects Agency's Program in High-Productivity Computer Systems under subcontract from Argonne National Laboratory.
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Self-assembled, Ferromagnetic-Insulator Nanocomposites for Ultrahigh-Density Data Storage, developed and submitted by Amit Goyal, Junsoo Shin, Claudia Cantoni and James Thompson of ORNL's Materials Science and Technology Division.
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Gravity of the PEM fuel cell cathode of water management - Battery ...
Gravity of the PEM fuel cell cathode of water management
This paper tested the gravity of the PEM fuel cell cathode in the water discharged from the impact of. By changing the placement of anode and cathode, the use of electronic load changes the output voltage and current measurement methods, corresponding to different wetting conditions, the cathode and the anode in the last, using the voltage / current density / temperature polarization curve drawn. Anode corresponds to the different upper and lower placement, cell temperature, anode and cathode gas humidification temperature, gas humidification temperature of 40 deg ~ 70 deg synchronize changes between the obtained results of four sets of experimental data. Experimental results show that the PEM fuel cell anode electrode placed in the last, the gravity is conducive to liquid water in the PEM fuel cell cathode discharge; in the PEM fuel cell electrodes placed on the cathode, the gravity is not conducive to liquid water in PEM fuel cell cathode discharge.
Of PEM (proton exchange membrane) fuel cell performance factors, such as temperature, pressure, fuel and oxidizer in the gas flow and other external factors, but also internal factors such as heat and mass transfer. One of the more significant factor is the impact of the internal water management. The quality of water management will directly affect its performance is good or bad, and the water in the PEM fuel cell inside is a double membrane can not be short of water, gas diffusion layer in the water not be blocked, excess water should also be considered discharge and so on.
Many people inside the PEM fuel cell water management research, most are in the form of model to simulate the transfer process. Hua Meng [1] established a three-dimensional model to simulate the MEA (membrane electrode assembly) within the continuous water transfer process. B. Carnes et al [2] using one-dimensional and two-dimensional model of the PEM fuel cell inside the proton and water were analyzed. Wei-Mon Yan et al [3] coupled with a one-dimensional model of the temperature gradient through a detailed analysis of mass transfer and PEM fuel cell membrane of water and heat management.
Trung Van Nguyen et al [4] from the gas transmission and distribution analysis of the PEM fuel cell stack within the water management. N. Rajalaks hmi et al [5] have done experiments to measure the battery leads to produce dry gas flow of water and change the shape of the water transport case. JJ Baschuk et al [6], with a mathematical model of the battery level on the performance of flooding. The existing two-dimensional and three-dimensional mathematical model of PEM fuel cell performance, the internal water transport and distribution of the simulation analysis. No gravity to be considered basic, and some only mentioned in the model, there is no way to verify experimentally the influence of gravity on the water.
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