A5013946755- Integrated Energy Systems Optimization
- Solar Radiation and Photovoltaics
- Atmospheric and Environmental Gas Dynamics
- Mechanical Behavior of Composites
- Wind Energy Research and Development
- Advanced ceramic materials synthesis
- Reservoir Engineering and Simulation Methods
- Energy Load and Power Forecasting
- Advanced Surface Polishing Techniques
- Power Systems and Technologies
- Smart Grid Energy Management
- Calibration and Measurement Techniques
- Solar and Space Plasma Dynamics
- Optical measurement and interference techniques
- Metal Forming Simulation Techniques
- Numerical methods in engineering
- Electric Power System Optimization
- Health, Environment, Cognitive Aging
- Water-Energy-Food Nexus Studies
- Medical Imaging Techniques and Applications
- Wind and Air Flow Studies
- Advanced Sensor and Energy Harvesting Materials
- Cloud Computing and Resource Management
- Meteorological Phenomena and Simulations
- Composite Material Mechanics
National Renewable Energy Laboratory
2017-2024
University of Illinois Urbana-Champaign
2017-2020
University of California, Santa Barbara
2012-2017
University of Washington
2011
Abstract. The mid-Atlantic will experience rapid wind plant development due to its promising resource located near large population centers. Wind turbines and plants create wakes, or regions of reduced speed, that may negatively affect downwind plants. We evaluate wake variability annual energy production with the first yearlong modeling assessment using Weather Research Forecasting model, deploying 12 MW across domain at a density 3.14 km−2, matching planned 3 km−2. Using series simulations...
We review the development of virtual tests for high-temperature ceramic matrix composites with textile reinforcement. Success hinges on understanding relationship between microstructure continuous-fiber composites, including its stochastic variability, and evolution damage events leading to failure. The combine advanced experiments theories address physical, mathematical, engineering aspects material definition failure prediction. Key new include surface image correlation methods...
Climate change will likely impact wind and solar resources. As power systems increasingly shift towards power, these resource changes system operations. We assess how operations be affected by climate impacts on resources generating generation profiles for a reference period five projections. then run unit commitment economic dispatch model to high-renewable generator fleet with profiles. For projections, we use 2041–2050 output from global models (GCMs) Representative Concentration Pathway...
Geothermal power plants are excellent resources for providing low carbon electricity generation with high reliability. However, many geothermal could realize significant improvements in operational efficiency from the application of improved modeling software. Increased integration digital twins into operations will not only enable engineers to better understand complex interplay components larger systems but also enhanced exploration space recent advances artificial intelligence (AI) and...
We report a simple method to produce stable chitosan derivative nanofibers via electrospinning. A solution with lactate salt was electrospun nanofibers, followed by thermal treatment enhance fiber stability. Chemical and morphological analyses demonstrated that the resulting were crosslinked amidation between salt. These fibers exhibited sustained structural stabilities serve as scaffold for biomedical applications.
Abstract The article describes an experimental investigation of oxidative degradation in mechanical performance a SiC fiber‐reinforced composite with Si CN matrix produced by polymer infiltration and pyrolysis. Tensile stress rupture retained strength tests were performed at 800°C dry air water vapor. Fracture surfaces examined to determine the degree fiber pull‐out constituent oxidation measure radii representative fracture mirrors. results indicate that tows adjacent cut occurs equally...
The remarkable ability of some plants and animals to cling strongly substrates despite relatively weak interfacial bonds has important implications for the development synthetic adhesives. Here, we examine origins large detachment forces using a thin elastomer tape adhered glass slide via van der Waals interactions, which serves as model system geckos, mussels ivy. required peeling are shown be strong function angle peeling, is consequence frictional sliding at edge attachment that dissipate...
We present a methodology for characterizing and reconstructing in‐plane weave variability in textile composites. Surface topography of partially processed C‐fiber/SiC matrix composite panel was measured using digital image correlation. The centroids tow segments that appear periodically on the fabric surface were located by analysis used as fiducial markers. Stochastic deviations markers from ideal periodic structure indicate geometrical variance. Fourier shows spatial wavelengths range size...
Techniques for characterizing tow architectures and defects in woven ceramic composites are required generating high‐fidelity geometric models subsequently probing effects of on composite performance. Although X ‐ray computed tomography ( CT ) has been shown to provide the requisite information with potentially sub‐μm resolution, technique is inherently limited only small volumes: order a few unit cells typical weaves. Here, we present an assessment efficacy complementary 2D technique, based...
SiC‐based composites exhibit oxidative embrittlement at intermediate temperatures. Although the mechanisms of internal oxidation in with initially hermetic matrices have been studied extensively, comparable studies on semipermeable matrices, such as those produced by polymer infiltration and pyrolysis, not reported. The present article focuses latter class composites, specifically a SiC f /SiCN m dual BN/Si 3 N 4 fiber coating. It describes detailed SEM TEM analyses microstructure before...
This article addresses the effects of small holes (1–2 mm in diameter) on tensile properties a woven C/SiC composite. Holes are introduced by one two methods: insertion fugitive rods into preform before adding matrix or drilling after panel fabrication. The strength exhibits only weak sensitivity to presence holes, regardless manner which introduced. Nevertheless, appear be somewhat less detrimental strength. attributed fact that tows specimens with locally intact and thus contribute...
Abstract. Offshore wind resource characterization in the United States relies heavily on simulated winds from numerical weather prediction (NWP) models, given lack of hub-height observations offshore. One such NWP data set used extensively by U.S. stakeholders is Wind Integration National Dataset (WIND) Toolkit, a 7-year time-series produced 2013 Renewable Energy Laboratory. In this study, we present an update to that for offshore California leverages recent advancements modeling...