11 Matching Results

Search Results

Advanced search parameters have been applied.
in creator/contributor: "Lawrence Berkeley National Laboratory. Environmental Energy Technologies Division."  
Results: 1 - 11
open access

Automated Demand Response Opportunities in Wastewater Treatment Facilities

Description: Wastewater treatment is an energy intensive process which, together with water treatment, comprises about three percent of U.S. annual energy use. Yet, since wastewater treatment facilities are often peripheral to major electricity-using industries, they are frequently an overlooked area for automated demand response opportunities. Demand response is a set of actions taken to reduce electric loads when contingencies, such as emergencies or congestion, occur that threaten supply-demand balance, … more
Date: November 19, 2008
Creator: Thompson, Lisa; Song, Katherine; Lekov, Alex & McKane, Aimee
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Impact of carbon structure and morphology on the electrochemical performance of LiFePO4/C composites

Description: The electrochemical performance of LiFePO4/C composites in lithium cells is closely correlated to pressed pellet conductivities measured by AC impedance methods. These composite conductivities are a strong function not only of the amount of carbon but of its structure and distribution. Ideally, the amount of carbon in composites should be minimal (less than about 2 wtpercent) so as not to decrease the energy density unduly. This is particularly important for plug-in hybrid electric vehicle appl… more
Date: September 19, 2007
Creator: Doeff, Marca M.; Wilcox, James D.; Yu, Rong; Aumentado, Albert; Marcinek, Marek & Kostecki, Robert
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Role of Water States on Water Uptake and Proton Transport in Nafion using Molecular Simulations and Bimodal Network

Description: Using molecular simulations and a bimodal domain network, the role of water state on Nafion water uptake and water and proton transport is investigated. Although the smaller domains provide moderate transport pathways, their effectiveness remains low due to strong, resistive water molecules/domain surface interactions. The water occupancy of the larger domains yields bulk-like water, and causes the observed transition in the water uptake and significant increases in transport properties.
Date: November 19, 2010
Creator: Michigan, U.; Hwang, Gi Suk; Kaviany, Massoud; Gostick, Jeffrey T.; Kientiz, Brian; Weber, Adam Z. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Understanding Bulk Power Reliability: The Importance of Good Data and A Critical Review of Existing Sources

Description: Bulk power system reliability is of critical importance to the electricity sector. Complete and accurate information on events affecting the bulk power system is essential for assessing trends and efforts to maintain or improve reliability. Yet, current sources of this information were not designed with these uses in mind. They were designed, instead, to support real-time emergency notification to industry and government first-responders. This paper reviews information currently collected by bo… more
Date: October 19, 2011
Creator: Fisher, Emily; Eto, Joseph H. & LaCommare, Kristina Hamachi
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Energy Efficiency Services Sector: Workforce Education and Training Needs

Description: This report provides a baseline assessment of the current state of energy efficiency-related education and training programs and analyzes training and education needs to support expected growth in the energy efficiency services workforce. In the last year, there has been a significant increase in funding for 'green job' training and workforce development (including energy efficiency), through the American Recovery and Reinvestment Act (ARRA). Key segments of the energy efficiency services secto… more
Date: March 19, 2010
Creator: Goldman, Charles A.; Peters, Jane S.; Albers, Nathaniel; Stuart, Elizabeth & Fuller, Merrian C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Transport Properties for Combustion Modeling

Description: This review examines current approximations and approaches that underlie the evaluation of transport properties for combustion modeling applications. Discussed in the review are: the intermolecular potential and its descriptive molecular parameters; various approaches to evaluating collision integrals; supporting data required for the evaluation of transport properties; commonly used computer programs for predicting transport properties; the quality of experimental measurements and their import… more
Date: February 19, 2010
Creator: Brown, N. J.; Bastein, L. & Price, P. N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

High resolution fossil fuel combustion CO2 emission fluxes for the United States

Description: Quantification of fossil fuel CO{sub 2} emissions at fine space and time resolution is emerging as a critical need in carbon cycle and climate change research. As atmospheric CO{sub 2} measurements expand with the advent of a dedicated remote sensing platform and denser in situ measurements, the ability to close the carbon budget at spatial scales of {approx}100 km{sup 2} and daily time scales requires fossil fuel CO{sub 2} inventories at commensurate resolution. Additionally, the growing inter… more
Date: March 19, 2009
Creator: Gurney, Kevin R.; Mendoza, Daniel L.; Zhou, Yuyu; Fischer, Marc L.; Miller, Chris C.; Geethakumar, Sarath et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Achieving Energy Savings with Highly-Controlled Lighting in an Open-Plan Office

Description: An installation in a Federal building tested the effectiveness of a highly-controlled, workstation-specific lighting retrofit. The study took place in an open-office area with 86 cubicles and low levels of daylight. Each cubicle was illuminated by a direct/indirectpendant luminaire with three 32 watt lamps, two dimmable DALI ballasts, and an occupancy sensor. A centralized control system programmed all three lamps to turn on and off according to occupancy on a workstation-by-workstation basis. … more
Date: April 19, 2010
Creator: Rubinstein, Francis & Enscoe, Abby
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Parametric System Curves: Correlations Between Fan Pressure Rise and Flow for Large Commercial Buildings

Description: A substantial fraction of HVAC energy use in large commercial buildings is due to fan operation. Fan energy use depends in part on the relationship between system pressure drop and flow through the fan, which is commonly called a "system curve." As a step toward enabling better selections of air-handling system components and analyses of common energy efficiency measures such as duct static pressure reset and duct leakage sealing, this paper shows that a simple four-parameter physical model can… more
Date: May 19, 2010
Creator: Sherman, Max & Wray, Craig
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Financial Innovation Among the Community Wind Sector in the United States

Description: In the relatively brief history of utility-scale wind generation, the 'community wind' sector - defined here as consisting of relatively small utility-scale wind power projects that are at least partly owned by one or more members of the local community - has played a vitally important role as a 'test bed' or 'proving ground' for wind turbine manufacturers. In the 1980s and 1990s, for example, Vestas and other now-established European wind turbine manufacturers relied heavily on community wind … more
Date: January 19, 2011
Creator: Bolinger, Mark
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
open access

An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California

Description: An increasing number of homes in the U.S. have sold with photovoltaic (PV) energy systems installed at the time of sale, yet relatively little research exists that estimates the marginal impacts of those PV systems on home sale prices. A clearer understanding of these possible impacts might influence the decisions of homeowners considering the installation of a PV system, homebuyers considering the purchase of a home with PV already installed, and new home builders considering including PV as a… more
Date: April 19, 2011
Creator: Hoen, Ben; Cappers, Peter; Wiser, Ryan & Thayer, Mark
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen