WorldCat Identities

University of Colorado Boulder

Overview
Works: 1,769 works in 1,983 publications in 1 language and 9,992 library holdings
Genres: Periodicals  Conference proceedings  Criticism, interpretation, etc  Bibliography  History  Catalogs 
Roles: Researcher, Publisher, Editor
Classifications: PE1, 420.5
Publication Timeline
Key
Publications about University of Colorado Boulder Publications about University of Colorado Boulder
Publications by University of Colorado Boulder Publications by University of Colorado Boulder
Most widely held works about University of Colorado Boulder
 
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Most widely held works by University of Colorado Boulder
English language notes by University of Colorado Boulder ( )
in English and held by 1,246 WorldCat member libraries worldwide
The Journal of energy and development by International Research Center for Energy and Economic Development ( )
in English and held by 394 WorldCat member libraries worldwide
Solar dynamics and G-modes final report by Jane B Blizard ( )
3 editions published in 1987 in English and held by 266 WorldCat member libraries worldwide
Neural network based energy storage system modeling for hybrid electric vehicles ( )
1 edition published in 1999 in English and held by 211 WorldCat member libraries worldwide
In this paper, we demonstrate the application of an artificial neural network (ANN) to modeling the ESS. The model maps the system's state-of-charge (SOC) and the vehicle's power requirement to the bus voltage and current. We show that neural network models can accurately capture the complex, non-linear correlations accurately. Further, we propose and deploy our new technique, Smart Select, for designing neural network training data
An analysis model for domestic hot water distribution systems preprint by Jeff Maguire ( )
1 edition published in 2011 in English and held by 202 WorldCat member libraries worldwide
A thermal model was developed to estimate the energy losses from prototypical domestic hot water (DHW) distribution systems for homes. The developed model, using the TRNSYS simulation software, allows researchers and designers to better evaluate the performance of hot water distribution systems in homes. Modeling results were compared with past experimental study results and showed good agreement
Program design analysis using BEopt building energy optimization software defining a technology pathway leading to new homes with zero peak cooling demand : preprint by Ren Anderson ( )
1 edition published in 2006 in English and held by 202 WorldCat member libraries worldwide
An optimization method based on the evaluation of a broad range of different combinations of specific energy efficiency and renewable-energy options is used to determine the least-cost pathway to the development of new homes with zero peak cooling demand. The optimization approach conducts a sequential search of a large number of possible option combinations and uses the most cost-effective alternatives to generate a least-cost curve to achieve home-performance levels ranging from a Title 24-compliant home to a home that uses zero net source energy on an annual basis. By evaluating peak cooling load reductions on the least-cost curve, it is then possible to determine the most cost-effective combination of energy efficiency and renewable-energy options that both maximize annual energy savings and minimize peak-cooling demand
Public land policy; proceedings by Western Resources Conference ( Book )
2 editions published in 1970 in English and held by 202 WorldCat member libraries worldwide
The Case for Mars : proceedings of a conference held April 29-May 2, 1981 at University of Colorado, Boulder, Colorado ( Book )
1 edition published in 1984 in English and held by 201 WorldCat member libraries worldwide
BEopt software for building energy optimization features and capabilities ( )
1 edition published in 2006 in English and held by 196 WorldCat member libraries worldwide
BEopt is a computer program designed to find optimal building designs along the path to ZNE. A user selects from predefined options in various categories to specify options to be considered in the optimization. Energy savings are calculated relative to a reference. The reference can be either a user-defined base-case building or a climate-specific Building America Benchmark building automatically generated by BEopt. The user can also review and modify detailed information on all available options in a linked options library spreadsheet. BEopt calls the DOE2 and TRNSYS simulation engines and uses a sequential search technique to automate the process of identifying optimal building designs along the path to ZNE. BEopt finds these optimal and near-optimal designs based on discrete building options reflecting realistic construction options. BEopt handles special situations with positive or negative interactions between options in different categories. The BEopt software includes a results browser that allows the user to navigate among different design points and retrieve detailed results regarding energy end-use and option costs in different categories. Multiple cases, based on a selected parameter such as climate, can be included in a BEopt project file for comparative purposes
Exploring high-dimensional data space identifying optimal process conditions in photovoltaics : preprint ( )
1 edition published in 2011 in English and held by 193 WorldCat member libraries worldwide
We demonstrate how advanced exploratory data analysis coupled to data-mining techniques can be used to scrutinize the high-dimensional data space of photovoltaics in the context of thin films of Al-doped ZnO (AZO), which are essential materials as a transparent conducting oxide (TCO) layer in CuInxGa1-xSe2 (CIGS) solar cells. AZO data space, wherein each sample is synthesized from a different process history and assessed with various characterizations, is transformed, reorganized, and visualized in order to extract optimal process conditions. The data-analysis methods used include parallel coordinates, diffusion maps, and hierarchical agglomerative clustering algorithms combined with diffusion map embedding
LIDAR wind speed measurement analysis and feed-forward blade pitch control for load mitigation in wind turbines January 2010 - January 2011 by Fiona M Dunne ( )
1 edition published in 2011 in English and held by 192 WorldCat member libraries worldwide
This report examines the accuracy of measurements that rely on Doppler LIDAR systems to determine their applicability to wind turbine feed-forward control systems and discusses feed-forward control system designs that use preview wind measurements. Light Detection and Ranging (LIDAR) systems are able to measure the speed of incoming wind before it interacts with a wind turbine rotor. These preview wind measurements can be used in feed-forward control systems designed to reduce turbine loads. However, the degree to which such preview-based control techniques can reduce loads by reacting to turbulence depends on how accurately the incoming wind field can be measured. The first half of this report examines the accuracy of different measurement scenarios that rely on coherent continuous-wave or pulsed Doppler LIDAR systems to determine their applicability to feed-forward control. In particular, the impacts of measurement range and angular offset from the wind direction are studied for various wind conditions. A realistic case involving a scanning LIDAR unit mounted in the spinner of a wind turbine is studied in depth with emphasis on choices for scan radius and preview distance. The effects of turbulence parameters on measurement accuracy are studied as well. Continuous-wave and pulsed LIDAR models based on typical commercially available units were used in the studies present in this report. The second half of this report discusses feed-forward control system designs that use preview wind measurements. Combined feedback/feed-forward blade pitch control is compared to industry standard feedback control when simulated in realistic turbulent above-rated winds. The feed-forward controllers are designed to reduce fatigue loads, increasing turbine lifetime and therefore reducing the cost of energy. Three feed-forward designs are studied: non-causal series expansion, Preview Control, and optimized FIR filter. The input to the feed-forward controller is a measurement of incoming wind speeds that could be provided by LIDAR. Non-causal series expansion and Preview Control methods reduce blade root loads but increase tower bending in simulation results. The optimized FIR filter reduces loads overall, keeps pitch rates low, and maintains rotor speed regulation and power capture, while using imperfect wind measurements provided by the spinning continuous-wave LIDAR model
Slope error measurement tool for solar parabolic trough collectors preprint by J. Kathleen Stynes ( )
1 edition published in 2012 in English and held by 192 WorldCat member libraries worldwide
The National Renewable Energy Laboratory (NREL) has developed an optical measurement tool for parabolic solar collectors that measures the combined errors due to absorber misalignment and reflector slope error. The combined absorber alignment and reflector slope errors are measured using a digital camera to photograph the reflected image of the absorber in the collector. Previous work using the image of the reflection of the absorber finds the reflector slope errors from the reflection of the absorber and an independent measurement of the absorber location. The accuracy of the reflector slope error measurement is thus dependent on the accuracy of the absorber location measurement. By measuring the combined reflector-absorber errors, the uncertainty in the absorber location measurement is eliminated. The related performance merit, the intercept factor, depends on the combined effects of the absorber alignment and reflector slope errors. Measuring the combined effect provides a simpler measurement and a more accurate input to the intercept factor estimate. The minimal equipment and setup required for this measurement technique make it ideal for field measurements
Combining droop curve concepts with control systems for wind turbine active power control preprint ( )
1 edition published in 2012 in English and held by 192 WorldCat member libraries worldwide
Wind energy is becoming a larger portion of the global energy portfolio and wind penetration has increased dramatically in certain regions of the world. This increasing wind penetration has driven the need for wind turbines to provide active power control (APC) services to the local utility grid, as wind turbines do not intrinsically provide frequency regulation services that are common with traditional generators. It is common for large scale wind turbines to be decoupled from the utility grid via power electronics, which allows the turbine to synthesize APC commands via control of the generator torque and blade pitch commands. Consequently, the APC services provided by a wind turbine can be more flexible than those provided by conventional generators. This paper focuses on the development and implementation of both static and dynamic droop curves to measure grid frequency and output delta power reference signals to a novel power set point tracking control system. The combined droop curve and power tracking controller is simulated and comparisons are made between simulations using various droop curve parameters and stochastic wind conditions. The tradeoffs involved with aggressive response to frequency events are analyzed. At the turbine level, simulations are performed to analyze induced structural loads. At the grid level, simulations test a wind plant's response to a dip in grid frequency
Solar thermal conversion of biomass to synthesis gas : cooperative research and development final report ( )
1 edition published in 2013 in English and held by 168 WorldCat member libraries worldwide
University of Colorado studies ( )
in English and held by 146 WorldCat member libraries worldwide
Human health effects of molybdenum in drinking water ( Book )
3 editions published in 1979 in English and held by 136 WorldCat member libraries worldwide
Progress of medieval studies in the United States of America ( )
in English and held by 120 WorldCat member libraries worldwide
No. 6-10 include the report of the Mediaeval Academy of America
Low-gravity sciences ( Book )
2 editions published in 1987 in English and held by 115 WorldCat member libraries worldwide
 
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Alternative Names

controlled identity University of Colorado (Boulder campus)

Boulder (Colo.)
Boulder (Colo.). University
Colorado University
Colorado. University of Colorado, Boulder
CU.
CU-Boulder.
CUREC
U.C.B.
UCB
University of Colorado
University of Colorado at Boulder.
University of Colorado, Boulder
University of Colorado (System). University of Colorado, Boulder
Languages
English (81)
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