SEARCH · Engineering Papers
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Robust Critical Point Detection is a software to compute critical points in a 2D or 3D vector field robustly. The software was developed as a part of the author's work at the lab as a Phd student under Livermore Scholar Program (now called Livermore Graduate Scholar Program).
Electrostatics software under development since 1999. Soee http://www.poissonboltzmann.org/ for more detail.
Abstract not provided
Haystack is a software agent platform for user emulation. We are leveraging python and the SPADE software packages to develop an architecture and platform where software agents can be sent actuation behaviors, configured with different behavior profiles (time based, event based, probability based, etc.), and controlled/monitored from a central control unit. The haystack agent platform provides the ability to model and simulate user behavior in cyber systems. This eliminates the need to fund real users to provide this interaction, provides control such that researchers can randomize, hold-steady, or model whatever behavior that want to study without running afoul of IRB requirements, and provides a documented truth that enables understanding what happened in and experiment and provides for repeatability.
Explore the source record for details and available documents.
The project team developed a software suite named Grid Stability Awareness System (GSAS) for power system near real-time stability monitoring and analysis based on synchrophasor measurement. The software suite consists of five analytical tools: an oscillation monitoring tool, a voltage stability monitoring tool, a transient instability monitoring tool, an angle difference monitoring tool, and an event detection tool. These tools have been integrated into one framework to provide power grid operators with both real-time or near real-time stability status of a power grid and historical information about system stability status. These tools are being considered for real-time use in the operation environment.
The follow up to the fall 2007 work on the structure, properties, thermal resistance, corrosion and fatigue of aluminum alloys in industrial manufacturing, discusses findings from the past decade, including sections on new casting alloys, novel casting technologies, and new methods of alloys design. The book also includes other hot topics, such as the implementation of computational technologies for the calculation of phase equilibria and thermodynamic properties of alloys, the development of software for calculation of diffusion processes in aluminum alloys, computational modeling of solidification microstructure and texture evolution of multi-component aluminum materials.
The U.S. residential building sector is responsible for thirty-eight percent of electricity use, as well as for 49%, 8%, 19% and 2% of U.S. SO2, NOx, CO2 and PM2.5 emissions, respectively. The residential building sector is also a key target of customer funded energy efficiency programs, which have typically been designed to reduce energy consumption (kWh). Today, energy efficiency is also being used to meet air emissions goals. However, not every kWh saved has the same mitigation potential. The goal of this work is to evaluate energy efficiency potential in the U.S. residential building sector and determine how energy conservation measures (ECMs) that reduce electricity consumption correlate to air emissions reductions. To assess energy efficiency potential, this analysis uses Scout, a software program developed by the U.S. Department of Energy that estimates the energy and CO2 impact potential of various ECMs on the U.S. residential and commercial building sectors. Here, Scout is first used to assess the total long term national energy (electricity, gas, and oil), CO2, and cost savings of deploying residential ECM portfolios. Then, electricity savings results from Scout in 2021 are used to assess the regional differences in emissions reductions with the Avoided Emissions and geneRation Tool (AVERT) model from different end uses. Better understanding the relationship between ECMs and cost-effective emission reductions will enable states, municipalities and other interested parties to meet multiple policy objectives through energy efficiency.
In the 1990s, a Los Alamos National Laboratory team developed a software package known as CICE that calculates the physics of sea ice, such as how it freezes, melts and moves across the ocean’s surface, influenced by external forces such as the ocean’s currents and the ever-shifting wind.
The software was developed to realize the precise control of the in-plane rotation and fixed-tilt motions, to drive the lens arrays accurately following the sun for the CPV module prototype.
Abstract not provided.
Explore the source record for details and available documents.
Monitoring functional machinery components that operate at elevated temperatures is costly and time consuming. This work explores leave in place composite transducers for high temperature monitoring of machinery components. A theoretical model was developed utilizing software provided by NASA. This model was then compared to the experimental results. The objective is to determine the characteristics of a set of spray-on composite transducers to identify the ideal transducer for any situation where a certain specification is made: - Operating temperature; - Signal amplitude/Signal to noise ratio; - Specific material property. The transducer is fabricated through a sol-gel deposition process that utilizes spraying the transducer onto the substrate. A sol-gel solution containing bismuth titanate is mixed with a combination of bismuth titanate and lead zirconate titanate(PZT) powders to create a composite transducer. Typical sintering methods have proved to be destructive and difficult to handle for the sol-gel deposition method; however, induction sintering has proved effective. -d{sub 33} decreases with increasing weight percent of bismuth titanate -the maximum usable temperature increases with increasing weight percent bismuth titanate -signal amplitude is also higher with increasing weight percent of bismuth titanate The ideal composition for the best signal amplitude and the highest operating temperature has been shown to be pure bismuth titanate; however, if the properties of the transducer are of utmost importance including conductivity and density then PZT should be added to increase these properties. The theoretical NASA Micromechanical Analysis Code by Generalized Method of Cell model has been validated through the experimental results of these experiments. Now that the composition of the transducer has been optimized to a specific application the future work is comprised of: - Utilizing the information to evaluate wall thickness - Integrating the optimized transducer with a wireless system for remote monitoring of mechanical component - Establishing a field deposition method for the spray-on transducer.
Washington River Protection Solutions, LLC is developing a software tool designed to simulate near-term waste affecting activities at the Hanford Site. The tool will allow for timely planning and evaluation of near-term operational activities, as well as facilitate feedback incorporation from the field to enable rapid iteration of various planning scenarios for a Multi-Year Operating Plan. Implementation of this tool in the Multi-Year Operating Plan planning process will support building a better connection between execution of daily activities and long-term mission objectives. (authors)
To design good software, you must always keep the end user in mind. Some benefits of incorporating the user-centered design process include saving users time and effort and helping them to utilize all capabilites of an application. In my work on the All Hazards Analysis (AHA) application, I employed principles of user-centered design to make the application easier for new users to navigate. This poster describes user-centered software design in general and showcases some of my user-centered design work on the AHA application.
This is a technical presentation that does not take into account contractual limitations or obligations under the Standard Contract for Disposal of Spent Nuclear Fuel and/or High-Level Radioactive Waste (Standard Contract) (10 CFR Part 961). For example, under the provisions of the Standard Contract, spent nuclear fuel in multi-assembly canisters is not an acceptable waste form, absent a mutually agreed to contract amendment.
Water heating accounts for about 18% of a typical US home’s energy use. Modern water heaters have enabled control options through APIs, offering customers the opportunity to reduce their energy cost and peak demand by dynamically adjusting settings. A water heater’s capacity to store energy using its storage tank makes it an asset for peak demand reduction and energy cost savings. For this reason, a mixed-integer linear programming model is proposed to minimize the energy cost of a high-performance water heater while also reducing the peak demand of the residential household under a time-of-use utility rate by dynamically changing the water heater’s running mode. Specifically, a multi-objective optimization model is formulated to determine the mode settings of the water heater considering hot water use, time-of-use rate, and peak demand limit of the residential household. The mode settings are associated with different dead bands of water temperature for triggering on/off action of the heat pump and heating element. A 66-gal hybrid electric high performance water heater was used for numerical simulation and practical experiments. The simulation results were well aligned with measurements of practical experiments, validating the soundness of the thermodynamic model. In addition, reductions of energy cost, enabling affordability, and reducing peak demand are demonstrated. The research team also developed a software framework with dashboards to automatically and continuously monitor and manage devices.
ANSYS Inc. develops and markets engineering simulation software and services used in the aerospace, automotive, manufacturing, electronics, biomedical, energy, defense, and many other industries. ANSYS is dedicated to engineering simulation and is the world’s leading software provider. ANSYS was founded in 1970 and is headquartered in Canonsburg, Pennsylvania. ANSYS provides an engineering analysis tool combining structural, thermal, computational fluid dynamics, acoustic, and electromagnetic simulation capabilities. ANSYS has two main programs, which use the same solvers: (1) Mechanical APDL (ANSYS Design Parametric Language), a Fortran-based coding platform, and (2) ANSYS Workbench, which uses a graphical user interface to aid in finite element analysis implementation. This plan covers both APDL and Workbench. The ANSYS computer program is a large-scale, multipurpose finite element program that can be used to solve several classes of engineering analyses. The analysis capabilities of ANSYS include the ability to solve static and dynamic structural analyses, steady-state and transient heat transfer problems, mode-frequency and buckling eigenvalue problems, static or time-varying magnetic analyses, and various types of field and coupled-field applications. The program contains many special features that allow nonlinearities or secondary effects such as plasticity, large strain, hyperelasticity, creep, swelling, large deflections, contact, stress stiffening, temperature dependency, material anisotropy, and radiation to be included in the solution. As ANSYS has been developed, other special capabilities such as substructuring, submodeling, random vibration, kinetostatics, kinetodynamics, free convection fluid analysis, acoustics, magnetics, piezoelectrics, coupled-field analysis, and design optimization have been added to the program. These capabilities contribute further to making ANSYS a multipurpose analysis tool for varied engineering disciplines. The ANSYS program has been in commercial use for over 50 years and has been used extensively in the aerospace, automotive, construction, electronic, energy services, manufacturing, nuclear, plastics, oil, and steel industries. Additionally, many consulting firms and hundreds of universities have used ANSYS for analysis, research, and educational purposes. ANSYS is recognized worldwide as one of the most widely used and capable programs of its type. Ansys design analysis software is the first created within a quality system with ISO 9001 certification, the internationally accepted quality standard. Product development, testing, maintenance and support processes also meet the United States Nuclear Regulatory Commission's quality requirements, as they have for nearly four decades. The Quality Assurance Service Agreement is suitable for the customers working in the nuclear industry who need to meet specific federal regulations including 10CRF50 Appendix B and provisions of 10CFR21. ANSYS has retained its original International Organization for Standardization (ISO) 9001 accreditation certificate since1995-05-04, It’s current certificate is valid until 2027-05-29.