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Design of Shallow p-type Dopants in ZnO

Description: ZnO is a promising material for short wave-length opto-electronic devices such as UV lasers and LEDs due to its large exciton binding energy and low material cost. ZnO can be doped easily n-type, but the realization of stable p-type ZnO is rather difficult. Using first-principles band structure methods the authors address what causes the p-type doping difficulty in ZnO and how to overcome the p-type doping difficulty in ZnO.
Date: May 1, 2008
Creator: Wei, S.H.; Li, J. & Y., Yan.
Partner: UNT Libraries Government Documents Department

Discovering and validating biological hypotheses from coherent patterns in functional genomics data

Description: The area of transcriptomics analysis is among the more established in computational biology, having evolved in both technology and experimental design. Transcriptomics has a strong impetus to develop sophisticated computational methods due to the large amounts of available whole-genome datasets for many species and because of powerful applications in regulatory network reconstruction as well as elucidation and modeling of cellular transcriptional responses. While gene expression microarray data… more
Date: August 12, 2008
Creator: Joachimiak, Marcin Pawel
Partner: UNT Libraries Government Documents Department

Bright Future for CPV

Description: Concentrator photovoltaics may play significant role in growth of solar electricity because of scalability. Need to take a bird?s eye view for the design and a worm?s eye view for diagnosis.
Date: February 3, 2009
Creator: Kurtz, S.
Partner: UNT Libraries Government Documents Department

High-Efficiency Solar Cells for Large-Scale Electricity Generation & Design Considerations for the Related Optics

Description: The photovoltaic industry has been growing exponentially at an average rate of about 35%/year since 1979. Recently, multijunction concentrator cell efficiencies have surpassed 40%. Combined with concentrating optics, these can be used for electricity generation.
Date: September 17, 2007
Creator: Kurtz, S.; Olson, J.; Geisz, J.; Friedman, D.; McMahon, W.; Ptak, A. et al.
Partner: UNT Libraries Government Documents Department

Infiltration and Injection Sites and Example Experiments

Description: The objectives of this paper are: (1) design a characterization and monitoring strategy for vadose zone infiltration and aquifer injection sites; and (2) track spatial and temporal evolution of water and reactive chemicals through vadose zone and aquifer.
Date: April 19, 2007
Creator: Rockhold, Mark
Partner: UNT Libraries Government Documents Department

CoolCab Truck Testing Project Update

Description: Presentation describes the CoolCab project, a DOE/NREL initiative to design efficient thermal management systems in heavy trucks to eliminate idling and reduce petroleum consumption.
Date: October 31, 2007
Creator: Proc, K.
Partner: UNT Libraries Government Documents Department

SETP Seed Fund, Session: OPV, Sensitized, Seed

Description: This project supports the Solar America Initiative by: (1) Exploring the concept of improving solar cell efficiency by generating and collecting multiple electrons per absorbed photon for h{nu} > 2Eg (Multiple Exciton Generation--MEG); and (2) Developing PV cells based on colloidally-synthesized semiconductor nanocrystals (NCs) which may eventually enable inexpensive and highly-efficient devices (single absorber design can potentially exceed Shockley-Queisser limit).
Date: April 1, 2008
Creator: Ellingson, R.
Partner: UNT Libraries Government Documents Department

Fuel Cell Turbocompressor

Description: No Description Available.
Date: April 1, 2003
Creator: Gee, Mark K.
Partner: UNT Libraries Government Documents Department

SETP CPV Technology, Session: CPV

Description: This project supports the Solar America Initiative by: (1) Reducing LCOE through--Increased power output from cell, and avenues for lowering of cell cost--substrate recycling; and (2) Establishing reliability by--Determination of cell degradation mechanisms; Integration of design for reliability into future cell development; future-generation cell development; cell reliability; advanced modeling for cell-system integration; basic science supporting cell development; and industry study.
Date: April 1, 2008
Creator: Friedman, D.
Partner: UNT Libraries Government Documents Department

Thermal Abuse Modeling of Li-Ion Cells and Propagation in Modules

Description: The objectives of this paper are: (1) continue to explore thermal abuse behaviors of Li-ion cells and modules that are affected by local conditions of heat and materials; (2) use the 3D Li-ion battery thermal abuse 'reaction' model developed for cells to explore the impact of the location of internal short, its heating rate, and thermal properties of the cell; (3) continue to understand the mechanisms and interactions between heat transfer and chemical reactions during thermal runaway for Li-io… more
Date: May 1, 2008
Creator: Kim, G.-H.; Pesaran, A. & Smith, K.
Partner: UNT Libraries Government Documents Department

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.
Partner: UNT Libraries Government Documents Department

Gearbox Reliability Collaborative - Phase 1 and 2 Overview

Description: The presentation given at the Wind Turbine Reliability Workshop at Sandia National Laboratories, August 2-3, 2011, serves as an overview for the findings from the Gearbox Reliability Collaborative Project Report: Findings from Phase 1 and Phase 2 Testing
Date: August 1, 2011
Creator: Link, H.
Partner: UNT Libraries Government Documents Department

Wind Turbine Gearbox Failure Modes - A Brief

Description: Wind turbine gearboxes are not always meeting 20-year design life. Premature failure of gearboxes increases cost of energy, turbine downtime, unplanned maintenance, gearbox replacement and rebuild, and increased warranty reserves. The problem is widespread, affects most Original Equipment Manufacturers, and is not caused by manufacturing practices. There is a need to improve gearbox reliability and reduce turbine downtime. The topics of this presentation are: GRC (Gearbox Reliability Collaborat… more
Date: October 1, 2011
Creator: Sheng, S.; McDade, M. & Errichello, R.
Partner: UNT Libraries Government Documents Department

Road to Net Zero (Presentation)

Description: A PowerPoint presentation on NREL's Research Support Facility (RSF) and the road to achieving net zero energy for new construction.
Date: May 1, 2011
Creator: Glover, B.
Partner: UNT Libraries Government Documents Department

IEC 61215: What It Is and Isn't

Description: Description and history of the IEC 61215 qualification test, what it accomplishes, and what it does not accomplish that would be useful to the community. The commercial success of PV is based on long term reliability of the PV modules. Today's modules are typically qualified/certified to: (1) IEC 61215 for Crystalline Silicon Modules; (2) IEC 61646 for Thin Film Modules; and (3) IEC 62108 for CPV Modules. These qualification tests do an excellent job of identifying design, materials and process… more
Date: February 1, 2012
Creator: Wohlgemuth, J.
Partner: UNT Libraries Government Documents Department

Durability of Polymeric Encapsulation Materials for Concentrating Photovoltaic Systems

Description: Many concentrating photovoltaic (CPV) systems use a polymeric encapsulant to couple and optical component and/or coverglass to the cell. In that location, the encapsulation improves the transmission of concentrated optical flux through interface(s), while protecting the cell from the environment. The durability of encapsulation materials, however, is not well established relative to the desired service life of 30 years. Therefore, we have initiated a screen test to identify the field-induced fa… more
Date: March 1, 2012
Creator: Miller, D. C.; Muller, M.; Kempe, M. D.; Araki, K.; Kennedy, C. E. & Kurtz, S. R.
Partner: UNT Libraries Government Documents Department
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