Conference Papers and Presentations
Reaction and Thermal Modeling of a Packed Bed Reactor for
Hydrogen Storage
COMSOL Conference, October 2007 Tyler Williams and Keith Gazda Andrew Kindler and Yuhong Huang Don Karner, ETEC and Jonathan Read, ECOtality Abstract: Energy storage is an increasingly important area of research both for use in alternative transportation and to enable the widespread use of intermittent energy sources such as wind and solar energy. This paper presents a multiphysics model of a novel technology for hydrogen storage, in which hydrogen is stored in a packed bed of metal hydride and released by application of steam through a number of competing reactions. The only suitable way to analyze reactor performance is with a multiphysics tool such as COMSOL. The model incorporates multiphysics couplings between reaction kinetics, flow in porous media, and heat transfer in and between porous media and gas. The model is used to study important performance metrics such as reaction front size, temperature, and propagation characteristics. Tracking Systems for CPV: Challenges and Opportunities Tyler Palmer Tyler Palmer, President of GreenMountain, spoke on the CPV panel at Solar Power 2007 in Long Beach, CA. The panel was moderated by Herb Hayden of Pinnacle West and other participante were Geoffrey Kinsey, Spectrolab, Vahan Garboushian, Amonix, and Bob McConnell, National Renewable Energy Laboratory. Standardization and Customization in PV Manufacturing Jennifer I. Coyle, Jon Guice, Eric C. Johnson, Stephen P. Shea This poster, presented at Solar Power 2006, explores the level of standardization in PV manufacturing and the roles for customization and modular solutions. Although eventually the future will belong to standardized equipment, we argue that in the near future custom-built equipment and customized solutions will continue to play an important role. In addition, we argue, it is likely that between these two extremes, intermediate, “modular” solutions will appear and become increasingly important in the medium-term.
Andrew M. Gabor, Shaun Montminy, Luis Alegria, Chris Bordonaro, Joe Woods and Larry Felton Max Davis, Brian Atchley and Tyler Williams The need to reduce PV manufacturing costs and the shortage of polysilicon have led Evergreen Solar to produce steadily thinner silicon wafers and solar cells. Manufacturing processes and handling equipment must keep up with the requirements of these more delicate materials. This paper describes findings on advanced techniques for optimizing the cell soldering process, detecting cracks in modules and using finite element modeling to predict cell breakage patterns.
EUPVSEC 20, October 2005 Tyler Williams and Jon Guice GreenMountain Engineering, LLC Sarah Boyd and Tonio Buonassisi University of California, Berkeley A GreenMountain Engineering white paper analyzing the net environmental benefits of photovoltaic systems and offering recommendations for choices in design and manufacturing that can improve these benefits.
Daniel M. Kammen
University of California, Berkeley Jon Guice, PhD This presentation on the power management challenges of the shift to renewable energy source was presented at PowerGen Renewable Energy 2005. |
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