Sample records for based micro-grid power

  1. CARNEGIE MELLON UNIVERSITY Electric Power Micro-grids: Opportunities and Challenges

    E-Print Network [OSTI]

    CARNEGIE MELLON UNIVERSITY Electric Power Micro-grids: Opportunities and Challenges for an Emerging;Electric Power Micro-grids: Barriers and opportunities for an emerging distributed energy architecture ii, such as engines and micro-turbines. #12;Electric Power Micro-grids: Barriers and opportunities for an emerging

  2. Smart Energy Management and Control for Fuel Cell Based Micro-Grid Connected Neighborhoods

    SciTech Connect (OSTI)

    Dr. Mohammad S. Alam

    2006-03-15T23:59:59.000Z

    Fuel cell power generation promises to be an efficient, pollution-free, reliable power source in both large scale and small scale, remote applications. DOE formed the Solid State Energy Conversion Alliance with the intention of breaking one of the last barriers remaining for cost effective fuel cell power generation. The Alliance’s goal is to produce a core solid-state fuel cell module at a cost of no more than $400 per kilowatt and ready for commercial application by 2010. With their inherently high, 60-70% conversion efficiencies, significantly reduced carbon dioxide emissions, and negligible emissions of other pollutants, fuel cells will be the obvious choice for a broad variety of commercial and residential applications when their cost effectiveness is improved. In a research program funded by the Department of Energy, the research team has been investigating smart fuel cell-operated residential micro-grid communities. This research has focused on using smart control systems in conjunction with fuel cell power plants, with the goal to reduce energy consumption, reduce demand peaks and still meet the energy requirements of any household in a micro-grid community environment. In Phases I and II, a SEMaC was developed and extended to a micro-grid community. In addition, an optimal configuration was determined for a single fuel cell power plant supplying power to a ten-home micro-grid community. In Phase III, the plan is to expand this work to fuel cell based micro-grid connected neighborhoods (mini-grid). The economic implications of hydrogen cogeneration will be investigated. These efforts are consistent with DOE’s mission to decentralize domestic electric power generation and to accelerate the onset of the hydrogen economy. A major challenge facing the routine implementation and use of a fuel cell based mini-grid is the varying electrical demand of the individual micro-grids, and, therefore, analyzing these issues is vital. Efforts are needed to determine the most appropriate means of implementing micro-grids and the costs and processes involved with their extended operation. With the development and availability of fuel cell based stand-alone power plants, an electrical mini-grid, encompassing several connected residential neighborhoods, has become a viable concept. A primary objective of this project is to define the parameters of an economically efficient fuel cell based mini-grid. Since pure hydrogen is not economically available in sufficient quantities at the present time, the use of reforming technology to produce and store excess hydrogen will also be investigated. From a broader perspective, the factors that bear upon the feasibility of fuel cell based micro-grid connected neighborhoods are similar to those pertaining to the electrification of a small town with a localized power generating station containing several conventional generating units. In the conventional case, the town or locality would also be connected to the larger grid system of the utility company. Therefore, in the case of the fuel cell based micro-grid connected neighborhoods, this option should also be available. The objectives of this research project are: To demonstrate that smart energy management of a fuel cell based micro-grid connected neighborhood can be efficient and cost-effective;To define the most economical micro-grid configuration; and, To determine how residential micro-grid connected fuel cell(s) can contribute to America's hydrogen energy future.

  3. Anforderungen an den Energie-und Leistungsumsatz der POWER TO GAS-Einheit im MICRO GRID eines industriellen Produktionsstandortes

    E-Print Network [OSTI]

    Paderborn, Universität

    Anforderungen an den Energie- und Leistungsumsatz der POWER TO GAS- Einheit im MICRO GRID eines MICRO GRID angeschlossenen elektrischen Energiespeicher und eine ,,POWER TO GAS" -Anlage kompensiert werden. Die ,,POWER TO GAS"­ Anlage entnimmt dem MICRO GRID überschüssige elektrische Energie zur

  4. Multi-Agent Based Techniques for Coordinating the Distribution of Electricity in a Micro-Grid Environment

    E-Print Network [OSTI]

    Southampton, University of

    and agent managed microgrids. Fred Schweppe, a recognised world leader in the field of electric powerMulti-Agent Based Techniques for Coordinating the Distribution of Electricity in a Micro-Grid will be required which incor- porates intermittent renewable resources, micro-generators, micro-storage devices

  5. Community-Based Electric Micro-Grids Can Contribute to Rural Development: Evidence from Kenya

    E-Print Network [OSTI]

    Kammen, Daniel M.

    an ability to charge and enforce cost-reflective tariffs and when electricity consumption is closely linked and distribute electricity in rural areas (Government of Kenya, 2006). As an incentive measure, systems below 3Community-Based Electric Micro-Grids Can Contribute to Rural Development: Evidence from Kenya

  6. Methods of integrating a high penetration photovoltaic power plant into a micro grid.

    SciTech Connect (OSTI)

    Stein, Joshua S.; Johnson, Lars (SunPower Corporation, Richmond, CA); Nelson, Lauren (SunPower Corporation, Richmond, CA); Lenox, Carl (SunPower Corporation, Richmond, CA); Johnson, Robert. (SunPower Corporation, Richmond, CA)

    2010-06-01T23:59:59.000Z

    The island of Lanai is currently one of the highest penetration PV micro grids in the world, with the 1.2 MWAC La Ola Solar Farm operating on a grid with a peak net load of 4.7 MW. This facility interconnects to one of Lanai's three 12.47 kV distribution circuits. An initial interconnection requirements study (IRS) determined that several control and performance features are necessary to ensure safe and reliable operation of the island grid. These include power curtailment, power factor control, over/under voltage and frequency ride through, and power ramp rate limiting. While deemed necessary for stable grid operation, many of these features contradict the current IEEE 1547 interconnection requirements governing distributed generators. These controls have been successfully implemented, tested, and operated since January 2009. Currently, the system is producing power in a curtailed mode according to the requirements of a power purchase agreement (PPA).

  7. Micro-grid operation of inverter based distributed generation with voltage and frequency dependent loads

    E-Print Network [OSTI]

    Zeineldin, H. H.

    Distribution systems are experiencing increasing penetration of distributed generation (DG). One attractive option is to use the available DG capacity during utility outages by forming planned micro-grids. Load sharing ...

  8. Entwicklung eines Netzleitsystems fr das MICRO GRID eines industriellen Produktionsstandortes mit einem hohen Anteil

    E-Print Network [OSTI]

    Paderborn, Universität

    an das lokale MICRO GRID angeschlossenen elektrischen Energiespeicher und eine ,,POWER TO GAS" -Anlage

  9. A Micro-Grid Simulator Tool (SGridSim) using Effective Node-to-Node Complex Impedance (EN2NCI) Models

    SciTech Connect (OSTI)

    Udhay Ravishankar; Milos manic

    2013-08-01T23:59:59.000Z

    This paper presents a micro-grid simulator tool useful for implementing and testing multi-agent controllers (SGridSim). As a common engineering practice it is important to have a tool that simplifies the modeling of the salient features of a desired system. In electric micro-grids, these salient features are the voltage and power distributions within the micro-grid. Current simplified electric power grid simulator tools such as PowerWorld, PowerSim, Gridlab, etc, model only the power distribution features of a desired micro-grid. Other power grid simulators such as Simulink, Modelica, etc, use detailed modeling to accommodate the voltage distribution features. This paper presents a SGridSim micro-grid simulator tool that simplifies the modeling of both the voltage and power distribution features in a desired micro-grid. The SGridSim tool accomplishes this simplified modeling by using Effective Node-to-Node Complex Impedance (EN2NCI) models of components that typically make-up a micro-grid. The term EN2NCI models means that the impedance based components of a micro-grid are modeled as single impedances tied between their respective voltage nodes on the micro-grid. Hence the benefit of the presented SGridSim tool are 1) simulation of a micro-grid is performed strictly in the complex-domain; 2) faster simulation of a micro-grid by avoiding the simulation of detailed transients. An example micro-grid model was built using the SGridSim tool and tested to simulate both the voltage and power distribution features with a total absolute relative error of less than 6%.

  10. Integration of Distributed Energy The CERTS MicroGrid Concept

    E-Print Network [OSTI]

    Resources The MicroGrid Concept Appendices Prepared for Transmission Reliability Program Office of PowerIntegration of Distributed Energy Resources The CERTS MicroGrid Concept CALIFORNIA ENERGY;Preface The U.S. Electricity Grid Today The U.S. electric power system is in the midst of a fundamental

  11. Vehicle to Micro-Grid: Leveraging Existing Assets for Reliable Energy Management (Poster)

    SciTech Connect (OSTI)

    Simpson, M.; Markel, T.; O'Keefe, M.

    2010-12-01T23:59:59.000Z

    Fort Carson, a United States Army installation located south of Colorado Springs, Colorado, is seeking to be a net-zero energy facility. As part of this initiative, the base will be constructing a micro-grid that ties to various forms of renewable energy. To reduce petroleum consumption, Fort Carson is considering grid-connected vehicles (GCVs) such as pure electric trucks to replace some of its on-base truck fleet. As the availability and affordability of distributed renewable energy generation options increase, so will the GCV options (currently, three all-electric trucks are available on the GSA schedule). The presence of GCVs on-base opens up the possibility to utilize these vehicles to provide stability to the base micro-grid. This poster summarizes work to estimate the potential impacts of three electric vehicle grid interactions between the electric truck fleet and the Fort Carson micro-grid: 1) full-power charging without management, 2) full-power charging capability controlled by the local grid authority, and 3) full-power charge and discharge capability controlled by the local grid authority. We found that even at relatively small adoption rates, the control of electric vehicle charging at Fort Carson will aid in regulation of variable renewable generation loads and help stabilize the micro-grid.

  12. Abstract -This paper presents the coordinated control of distributed energy storage systems (DESSs) in DC micro-grids.

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    ) in DC micro-grids. In order to balance the state-of-charge (SoC) of each energy storage unit (ESU--Droop control; distributed energy storage system (DESS); DC micro-grids; state-of-charge (SoC) I. INTRODUCTION and more popularity [1]. Nowadays DC micro-grids are becoming more attractive with the raise of DC power

  13. Micro-Grids for Colonias (TX)

    SciTech Connect (OSTI)

    Dean Schneider; Michael Martin; Renee Berry; Charles Moyer

    2012-07-31T23:59:59.000Z

    This report describes the results of the final implementation and testing of a hybrid micro-grid system designed for off-grid applications in underserved Colonias along the Texas/Mexico border. The project is a federally funded follow-on to a project funded by the Texas State Energy Conservation Office in 2007 that developed and demonstrated initial prototype hybrid generation systems consisting of a proprietary energy storage technology, high efficiency charging and inverting systems, photovoltaic cells, a wind turbine, and bio-diesel generators. This combination of technologies provided continuous power to dwellings that are not grid connected, with a significant savings in fuel by allowing power generation at highly efficient operating conditions. The objective of this project was to complete development of the prototype systems and to finalize and engineering design; to install and operate the systems in the intended environment, and to evaluate the technical and economic effectiveness of the systems. The objectives of this project were met. This report documents the final design that was achieved and includes the engineering design documents for the system. The system operated as designed, with the system availability limited by maintenance requirements of the diesel gensets. Overall, the system achieved a 96% availability over the operation of the three deployed systems. Capital costs of the systems were dependent upon both the size of the generation system and the scope of the distribution grid, but, in this instance, the systems averaged $0.72/kWh delivered. This cost would decrease significantly as utilization of the system increased. The system with the highest utilization achieved a capitol cost amortized value of $0.34/kWh produced. The average amortized fuel and maintenance cost was $0.48/kWh which was dependent upon the amount of maintenance required by the diesel generator. Economically, the system is difficult to justify as an alternative to grid power. However, the operational costs are reasonable if grid power is unavailable, e.g. in a remote area or in a disaster recovery situation. In fact, avoided fuel costs for the smaller of the systems in use during this project would have a payback of the capital costs of that system in 2.3 years, far short of the effective system life.

  14. Energie-und Leistungsbilanzierung im MICRO GRID eines industriellen Produktionsstandortes mit

    E-Print Network [OSTI]

    Paderborn, Universität

    an das lokale MICRO GRID angeschlossenen elektrischen Energiespeicher und eine ,,POWER TO GAS" -Anlage ermöglichen. Aufgabe: Um einen effizienten Einsatz des BHKW's, des Speichers und der POWER TO GAS ­ Einheit zu Konzeptes zum wirtschaftlich effizienten Einsatz des BHKW's, des Speichers und der POWER TO GAS ­ Einheit 6

  15. A Virtual Laboratory for Micro-Grid Information and Communication Infrastructures

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    for communication between distributed energy resources, building, substations, etc. To evaluate various ICT and substations; monitoring electricity consumption; adjusting the power consumption of household applications. Within the smart-grid design hierarchy, micro-grids represent localized power grids containing both

  16. SMART FUEL CELL OPERATED RESIDENTIAL MICRO-GRID COMMUNITY

    SciTech Connect (OSTI)

    Dr. Mohammad S. Alam (PI/PD)

    2005-04-13T23:59:59.000Z

    To build on the work of year one by expanding the smart control algorithm developed to a micro-grid of ten houses; to perform a cost analysis; to evaluate alternate energy sources; to study system reliability; to develop the energy management algorithm, and to perform micro-grid software and hardware simulations.

  17. Developing and Implementing the Foundation for a Renewable Energy-Based "Distribution Generation Micro-grid": A California Energy Commission Public Interest Energy Research Co-Funded Program

    E-Print Network [OSTI]

    Lilly, P.; Sebold, F. D.; Carpenter, M.; Kitto, W.

    in response to a variety of factors, including: media attention to occasional lack of power supply, highly fluctuating West Coast electric wholesale prices, unprecedented public- and investor-owned utility retail rate increases, occasional rolling blackouts...

  18. Vehicle to MicroGrid: Leveraging Existing Assets for Reliable Energy Management Mike Simpson, Tony Markel, and Michael O'Keefe

    E-Print Network [OSTI]

    . Communities Vehicles POWER ELECTRONICS EFFICIENCY POWER ELECTRONICS EFFICIENCY INFRASTRUCTURE CODES Electricity GCV MicroGrid The Smith Electric Newton allelectric truckFort Carson Photovoltaic Installation Managed Charging 3 Managed Bidirectional Charging ANALYSIS Courtesy of Smith Electric Vehicles

  19. This document is a preprint of the final paper: Shafiee, Qobad; Vasquez, Juan C.; Guerrero, Josep M.; , "Distributed secondary control for islanded MicroGrids -A networked control systems approach," IECON 2012 -38th Annual Conference on IEEE Industrial El

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    approach is not only able to restore frequency and voltage of the MicroGrid but also ensures reactive power such as power electronics converters, distributed generations (DGs), energy storage systems.; , "Distributed secondary control for islanded MicroGrids - A networked control systems approach," IECON 2012 - 38

  20. Improving Energy Use Forecast for Campus Micro-grids using Indirect Indicators Department of Computer Science

    E-Print Network [OSTI]

    Prasanna, Viktor K.

    and institutional campuses can significantly contribute to energy conservation. The rollout of smart grids of occupants, and is a micro-grid test-bed for the DoE sponsored Los Angeles Smart Grid Demonstration ProjectImproving Energy Use Forecast for Campus Micro-grids using Indirect Indicators Saima Aman

  1. Messdatenerfassung und Kommunikation im MICRO GRID eines industriellen Produktionsstandortes

    E-Print Network [OSTI]

    Paderborn, Universität

    Energiespeicher und eine ,,POWER TO GAS" -Anlage kompensiert werden. Die intelligente Koordination von Erzeugungs

  2. Robust Networked Control Scheme for Distributed Secondary Control of Islanded MicroGrids

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    1 Robust Networked Control Scheme for Distributed Secondary Control of Islanded MicroGrids Qobad scenarios that have an increased number of distributed generators (DGs) within the MG. Due (RES) and distributed generators (DGs), microgrids (MGs) have recently attracted a significant interest

  3. A Holonic Control Architecture for a Heterogeneous Multi-Objective Smart Micro-Grid

    E-Print Network [OSTI]

    Diaconescu, Ada

    A Holonic Control Architecture for a Heterogeneous Multi-Objective Smart Micro-Grid Sylvain Frey proposes a holonic control architecture to help meet these requirements. We show how this architecture can that the proposed architecture can facilitate the development of control solutions addressing the aforementioned

  4. Integration of Distributed Energy The CERTS MicroGrid Concept

    E-Print Network [OSTI]

    the California Energy Commission passed upon the accuracy or adequacy of the information in this report. #12 Foundation's Power Systems Engineering Research Center, and Sandia National Laboratories. #12;LBNL-50829 Systems Integration Program Public Interest Energy Research California Energy Commission Prepared

  5. Development of a Smart MicroGrid Testbed

    SciTech Connect (OSTI)

    Lee, Wei-Jen; Wetz, David

    2013-04-25T23:59:59.000Z

    Demand for electricity is rapidly increasing thereby applying pressure to expand generation and distribution capacity worldwide. The expansion of traditional services not only imposes burdens on financial resources but also encounters many challenges from community residents who oppose the construction of new power generation plants or transmission facilities in their backyard. From the integrated resource planning point of view, a feasible and economical remedy is, therefore, to utilize existing dispersed generation capacity known as distributed generation (DG) and/or renewable energy resources that may exist in the vicinity of the load centers. The main criteria for selecting the type of fuel source for a DG is its local availability, conversion system technological advancement, impact on the environment, and operating cost. DG’s have existed in the market for many years. Large diesel or gas powered generation sets are used in stand-by mode to power up vital services such as hospitals, financial and commercial compounds, telecommunication centers and industrial premises. Wind turbines, photovoltaic energy sources, and fuel cells are new comers that are now competing in size and efficiency with many standard generating sets. With this in mind, they are being used in many places not only as stand-by units but as the prime source of power particularly when the $/kWhr rate is high[1-5].

  6. Dynamic Reactive Power Control of Isolated Power Systems

    E-Print Network [OSTI]

    Falahi, Milad

    2012-10-03T23:59:59.000Z

    This dissertation presents dynamic reactive power control of isolated power systems. Isolated systems include MicroGrids in islanded mode, shipboard power systems operating offshore, or any other power system operating in islanded mode intentionally...

  7. Control of single-phase islanded PV/battery streetlight cluster based on Power-Line Signaling

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    units in a micro- grid should not be only determined by load demand, but also by the available power storage systems (ESS). Specifically, the recharging process of secondary battery, the most prominent ESS of dis- tributed storage systems (DS), including both renewable and non-renewable sources, like ESS [1

  8. Modellierung der regelbaren Quellen, Lasten und Speicher im MICRO GRID eines industriellen Produktionsstandortes fr die Lastflussbe-

    E-Print Network [OSTI]

    Paderborn, Universität

    ,,POWER TO GAS" -Anlage kompensiert werden. Die intelligente Koordination von Erzeugungs- und Regelverhalten der Solar- Wechselrichter, des Batteriespeichers und der POWER TO GAS ­ Einheit in einer

  9. Wirtschaftliche Bereitstellung von Netzdienstleistungen durch das MICRO GRID eines industriellen Produktionsstandortes

    E-Print Network [OSTI]

    Paderborn, Universität

    GRID angeschlossenen elektrischen Energiespeicher und eine ,,POWER TO GAS" -Anlage kompensiert werden

  10. Modellierung des MICRO GRIDS eines industriellen Produktions-standortes mit einem hohen Anteil regenerativ erzeugter elektrischer

    E-Print Network [OSTI]

    Paderborn, Universität

    regenerativ erzeugter elektrischer Energie und innovativen Energiespeichen Motivation: Die AEG Power Solutions Einspeisung der PV- Anlage, sowie die weitgehend fremd geführte elektrische Einspeisung des BHKW sollen dabei für den optimalen Betrieb des Netzes abgeleitet werden. Gliederung: 1. Literaturrecherche 2

  11. 248 IEEE TRANSACTIONS ON POWER DELIVERY, VOL. 20, NO. 1, JANUARY 2005 Micro-Grid Autonomous Operation During

    E-Print Network [OSTI]

    Lehn, Peter W.

    - neering, University of Toronto, Toronto, ON M5S 3G4, Canada (e-mail: katiraei@ele.utoronto.ca; iravani

  12. A power beaming based infrastructure for space power

    SciTech Connect (OSTI)

    Bamberger, J.A.

    1991-08-01T23:59:59.000Z

    At present all space mission power requirements are met by integral, on-board, self-contained power systems. To provide needed flexibility for space exploration and colonization, an additional approach to on-board, self-contained power systems is needed. Power beaming, an alternative approach to providing power, has the potential to provide increased mission flexibility while reducing total mass launched into space. Laser-power beaming technology provides a viable power and communication infrastructure that can be developed sequentially as it is applied to power satellite constellations in Earth orbit and to orbital transport vehicles transferring satellites and cargos to geosynchronous orbit and beyond. Coupled with nuclear electric propulsion systems for cargo transport, the technology can be used to provide global power to the Lunar surface and to Mars' surface and moons. The technology can be developed sequentially as advances in power system and propulsion system technology occur. This paper presents stepwise development of an infrastructure based on power beaming that can support the space development and exploration goals of the Space Exploration Initiative. Power scenarios based on commonality of power systems hardware with cargo transport vehicles are described. Advantages of this infrastructure are described. 12 refs., 4 figs., 1 tab.

  13. Particle Swarm Optimization Based Reactive Power Optimization

    E-Print Network [OSTI]

    Sujin, P R; Linda, M Mary

    2010-01-01T23:59:59.000Z

    Reactive power plays an important role in supporting the real power transfer by maintaining voltage stability and system reliability. It is a critical element for a transmission operator to ensure the reliability of an electric system while minimizing the cost associated with it. The traditional objectives of reactive power dispatch are focused on the technical side of reactive support such as minimization of transmission losses. Reactive power cost compensation to a generator is based on the incurred cost of its reactive power contribution less the cost of its obligation to support the active power delivery. In this paper an efficient Particle Swarm Optimization (PSO) based reactive power optimization approach is presented. The optimal reactive power dispatch problem is a nonlinear optimization problem with several constraints. The objective of the proposed PSO is to minimize the total support cost from generators and reactive compensators. It is achieved by maintaining the whole system power loss as minimum...

  14. 2004 Power Marketing Plan - Base Resource Overview

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    * Terminates the existing contract amendments that provide for a customer's right to purchase power from Western after 2004. Execution of the Base Resource contract sustains a...

  15. Agent Based Power System Transient Stability Enhancement

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    Agent Based Power System Transient Stability Enhancement M. S. Rahman, Student Member, IEEE, M. J. Hossain and H. R. Pota Abstract--This paper describes an intelligent agent approach to power system fault electric power system is most capital investive and vast complex network with increasing interconnections

  16. Optimal Multi-scale Capacity Planning for Power-Intensive Continuous Processes under

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    -time basis. A set of measures, such as co-generation, micro-grids, future storage technologies and demand States. At the same time, the power grid is in transition to the so-called smart grid with the ambition- side management (DSM), is expected to play an important role in helping today's power grid, mastering

  17. Universal power transistor base drive control unit

    DOE Patents [OSTI]

    Gale, A.R.; Gritter, D.J.

    1988-06-07T23:59:59.000Z

    A saturation condition regulator system for a power transistor is disclosed which achieves the regulation objectives of a Baker clamp but without dumping excess base drive current into the transistor output circuit. The base drive current of the transistor is sensed and used through an active feedback circuit to produce an error signal which modulates the base drive current through a linearly operating FET. The collector base voltage of the power transistor is independently monitored to develop a second error signal which is also used to regulate base drive current. The current-sensitive circuit operates as a limiter. In addition, a fail-safe timing circuit is disclosed which automatically resets to a turn OFF condition in the event the transistor does not turn ON within a predetermined time after the input signal transition. 2 figs.

  18. Universal power transistor base drive control unit

    SciTech Connect (OSTI)

    Gale, Allan R. (Allen Park, MI); Gritter, David J. (Racine, WI)

    1988-01-01T23:59:59.000Z

    A saturation condition regulator system for a power transistor which achieves the regulation objectives of a Baker clamp but without dumping excess base drive current into the transistor output circuit. The base drive current of the transistor is sensed and used through an active feedback circuit to produce an error signal which modulates the base drive current through a linearly operating FET. The collector base voltage of the power transistor is independently monitored to develop a second error signal which is also used to regulate base drive current. The current-sensitive circuit operates as a limiter. In addition, a fail-safe timing circuit is disclosed which automatically resets to a turn OFF condition in the event the transistor does not turn ON within a predetermined time after the input signal transition.

  19. Evaluating the Effectiveness of Model-Based Power Characterization

    E-Print Network [OSTI]

    Snoeren, Alex

    a model of the system that describes power consump- tion in terms of power states and attributing in measured power draw. Previous work on power modeling has focused on modeling total system power consumptionEvaluating the Effectiveness of Model-Based Power Characterization John C. McCullough, Yuvraj

  20. Dynamic Power ... Abbasian et. al.1 Wavelet-Based Dynamic Power Management for

    E-Print Network [OSTI]

    Pedram, Massoud

    Dynamic Power ... Abbasian et. al.1 Wavelet-Based Dynamic Power Management for Non and Phrases: Dynamic Power Management, Wavelet based prediction, non-stationary service request. Low Power and frequency scaling (DVFS) and dynamic power management (DPM), use runtime behavior of the system to reduce

  1. Control and Protection of Power Electronics Interfaced Distri-buted Generation Systems in a Customer-Driven Microgrid

    E-Print Network [OSTI]

    Tolbert, Leon M.

    in a Customer-Driven Microgrid Fang Z. Peng, Yun Wei Li and Leon M. Tolbert Abstract ­ This paper discusses-driven microgrid (CDM). Particularly, the following topics will be addressed: microgrid system configurations); renewable energy source (RES); micro-source; microgrid; customer-driven micro- grid (CDM), power electronics

  2. Reinforcement Learning Based Dynamic Power Management with a Hybrid Power Supply

    E-Print Network [OSTI]

    Pedram, Massoud

    Reinforcement Learning Based Dynamic Power Management with a Hybrid Power Supply Siyu Yue, Di Zhu management (DPM) in battery- powered mobile systems attempts to achieve higher energy efficiency to a previously reported expert- based learning approach. Keywords-dynamic power management; reinforcement

  3. Developing and Implementing the Foundation for a Renewable Energy-Based "Distribution Generation Micro-grid": A California Energy Commission Public Interest Energy Research Co-Funded Program 

    E-Print Network [OSTI]

    Lilly, P.; Sebold, F. D.; Carpenter, M.; Kitto, W.

    2002-01-01T23:59:59.000Z

    The California Energy Commission has been implementing its Public Interest Energy Research (PIER) and Renewable Energy Programs since early 1998. In the last two years, the demand for renewable distributed generation systems has increased rapidly...

  4. Battery-Aware Power Management Based on Markovian Decision Processes

    E-Print Network [OSTI]

    Pedram, Massoud

    Battery-Aware Power Management Based on Markovian Decision Processes Peng Rong Massoud Pedram prong electronic system under a given performance constraint. A new stochastic model of a power-managed battery-powered, such as workload statistics and performance constraints are properly captured. The battery-aware power management

  5. Analysis of silicon carbide based semiconductor power devices and their application in power factor correction 

    E-Print Network [OSTI]

    Durrani, Yamin Qaisar

    2005-11-01T23:59:59.000Z

    ......................................................... 6 1.3.1 Flyback converter based PFC..................................................... 9 1.3.2 Boost converter based PFC....................................................... 10 1.3.3 Dual boost PFC scheme............................................................... 11 1.4. High frequency operation of PFC...................................................... 12 1.5. SiC based power devices in switching power converters.................. 13 1.6. Research objective...

  6. Complex Network Framework Based Dependency Matrix of Electric Power Grid

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    Complex Network Framework Based Dependency Matrix of Electric Power Grid A. B. M. Nasiruzzaman, H, Australian power grid operated under the National Electricity Market (NEM) is the worlds longest scale analysis of power grid using complex network framework a network matrix is formed. The elements

  7. Battery-Aware Power Management Based on Markovian Decision Processes

    E-Print Network [OSTI]

    Pedram, Massoud

    1 Battery-Aware Power Management Based on Markovian Decision Processes Peng Rong and Massoud Pedram under latency and loss rate constraints. First, a detailed stochastic model of a power-managed, battery recovery. Next, the battery-aware dynamic power management problem is formulated as a policy optimization

  8. Power Control for Crossbar-based Input-Queued Switches

    E-Print Network [OSTI]

    , if f is the maximum digital signal frequency, the power consumption of a CMOS device is proportional number of data simultaneously flowing across the switching fabric. Thermal power dissipation is becoming1 Power Control for Crossbar-based Input-Queued Switches Andrea Bianco, Paolo Giaccone, Guido

  9. Model Predictive Control based Real Time Power System Protection Schemes

    E-Print Network [OSTI]

    Kumar, Ratnesh

    1 Model Predictive Control based Real Time Power System Protection Schemes Licheng Jin, Member by controlling the production, absorption as well as flow of reactive power at various locations in the system predictive control, trajectory sensitivity, voltage stabilization, switching control, power system I

  10. Propeller based human powered swimming device

    E-Print Network [OSTI]

    Bunker, Kristine (Kristine Alina)

    2014-01-01T23:59:59.000Z

    Currently the only human powered swimming device widely sold on the market are swim flippers. However, flippers are not efficient for the human body, and there is a potential to increase the speed while swimming with a ...

  11. U.S. Forward Operating Base Applications of Nuclear Power

    SciTech Connect (OSTI)

    Dr. George Griffith

    2015-01-01T23:59:59.000Z

    Nuclear power was demonstrated and made practical so that it could support the military mission of powering ships and submarines. The critical mission benefits of almost unlimited air and fuel-independent power on submarines helped spur development of the nuclear power technology that still forms the basis for the modern nuclear power industry.i Potential production of large amounts of power with low-fuel volume inputs attracted military interest shortly after nuclear power was proven to be viable.ii The expected benefit of nuclear power plants at a forward operating base (FOB) is a significant reduction in the operational and transportation risks and cost required to power FOBs. The reduction in fuel and water volumes that need to be transported is viewed as particularly valuable during war time, when mission capability and reducing enemy exposure is considered much more important than cost. Paper reviews current reactor experience and previous small military reactor applications.

  12. Battery-Aware Power Management Based on Markovian Decision

    E-Print Network [OSTI]

    Pedram, Massoud

    ] " Electrical circuit model: A spice model of the lithium-ion batteries [Gold-97] " Electro-chemical model: Generic dual-foil lithium-ion battery model [Doyle-94] ! Battery Management " Discharge rate-based policyBattery-Aware Power Management Based on Markovian Decision Processes Battery-Aware Power Management

  13. Framework for Advance Sustainable Building Design. Smart Micro-Grid Enabled Buildings and Utility-Side of the Meter Energy Markets

    E-Print Network [OSTI]

    Goldberg, Bennett

    and Requirements System Information · Temperature, wind, sun, pollution ·Built Environment Impact on Infrastructure/Transmission and Retail/Distribution Cost and Congestion Modeling," First IEEE Conf. on Smart Grid Communic., Gaithersburg-Time Power Markets for Energy and Reserves Incorporating Local Distribution Network Costs and Congestion," 48

  14. Probabilistic Vulnerability Assessment Based on Power Flow and Voltage Distribution

    SciTech Connect (OSTI)

    Ma, Jian; Huang, Zhenyu; Wong, Pak C.; Ferryman, Thomas A.

    2010-04-30T23:59:59.000Z

    Risk assessment of large scale power systems has been an important problem in power system reliability study. Probabilistic technique provides a powerful tool to solve the task. In this paper, we present the results of a study on probabilistic vulnerability assessment on WECC system. Cumulant based expansion method is applied to obtain the probabilistic distribution function (PDF) and cumulative distribution function (CDF) of power flows on transmission lines and voltage. Overall risk index based on the system vulnerability analysis is calculated using the WECC system. The simulation results based on WECC system is used to demonstrate the effectiveness of the method. The methodology can be applied to the risk analysis on large scale power systems.

  15. Power Management for Wireless Sensor Networks Based on Energy Budgets

    E-Print Network [OSTI]

    Turau, Volker

    Power Management for Wireless Sensor Networks Based on Energy Budgets Christian Renner Institute with wireless sensor networks powered by energy-harvesting supplies. We introduce the concept of an energy budget, the amount of energy available to a sensor node for a given period of time. The presented tools

  16. USING SAT-BASED TECHNIQUES IN LOW POWER STATE ASSIGNMENT

    E-Print Network [OSTI]

    Aloul, Fadi

    and basis for further exploration. Keywords: State assignment; power; integer linear programming; Boolean¯ability and Integer Linear Programming (ILP) methods in ¯nding an optimized solution. We formulate the problem as a 0USING SAT-BASED TECHNIQUES IN LOW POWER STATE ASSIGNMENT ¤ ASSIM SAGAHYROON and FADI A. ALOUL

  17. A market-power based model of business groups

    E-Print Network [OSTI]

    Feenstra, Robert C; Huang, D S; Hamilton, G G

    2003-01-01T23:59:59.000Z

    complicated. In our model, business groups not only sellof Indian groups. 3. A Model of Business Groups We willa market-power based model of business groups. This We

  18. AlGaN/GaN-based power semiconductor switches

    E-Print Network [OSTI]

    Lu, Bin, Ph. D. Massachusetts Institute of Technology

    2013-01-01T23:59:59.000Z

    AlGaN/GaN-based high-electron-mobility transistors (HEMTs) have great potential for their use as high efficiency and high speed power semiconductor switches, thanks to their high breakdown electric field, mobility and ...

  19. Spin-on-doping for output power improvement of silicon nanowire array based thermoelectric power generators

    SciTech Connect (OSTI)

    Xu, B., E-mail: bin.xu09@imperial.ac.uk; Fobelets, K. [Department of Electrical and Electronic Engineering, Imperial College London, Exhibition Road, SW7 2BT London (United Kingdom)

    2014-06-07T23:59:59.000Z

    The output power of a silicon nanowire array (NWA)-bulk thermoelectric power generator (TEG) with Cu contacts is improved by spin-on-doping (SOD). The Si NWAs used in this work are fabricated via metal assisted chemical etching (MACE) of 0.01–0.02 ? cm resistivity n- and p-type bulk, converting ?4% of the bulk thickness into NWs. The MACE process is adapted to ensure crystalline NWs. Current-voltage and Seebeck voltage-temperature measurements show that while SOD mainly influences the contact resistance in bulk, it influences both contact resistance and power factor in NWA-bulk based TEGs. According to our experiments, using Si NWAs in combination with SOD increases the output power by an order of 3 under the same heating power due to an increased power factor, decreased thermal conductivity of the NWA and reduced Si-Cu contact resistance.

  20. Optimal Demand Response Based on Utility Maximization in Power Networks

    E-Print Network [OSTI]

    Low, Steven H.

    Optimal Demand Response Based on Utility Maximization in Power Networks Na Li, Lijun Chen different appliances including PHEVs and batteries and propose a demand response approach based on utility. The utility company can thus use dynamic pricing to coordinate demand responses to the benefit of the overall

  1. Environmental Analysis of the Coal-based Power Production with Amine-based Carbon Capture

    E-Print Network [OSTI]

    . Based on LCA methodology the study examines the operation of six coal power plants, which differ by the expected efficiency parameters for the year 2020: (1) Coal plant2005: pulverized coal power plant already operating in 2005 (2) Coal plant2010: pulverized coal power plant installed in 2010 (3) Coal plant2020

  2. Structural-Based Power-Aware Assignment of Don't Cares for Peak Power Reduction during Scan Testing

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Structural-Based Power-Aware Assignment of Don't Cares for Peak Power Reduction during Scan Testing on ISCAS'89 and ITC'99 benchmark circuits with the proposed structural-based power- aware X, and the resulting excessive power consumption can cause structural damage or severe decrease in reliability

  3. Reinforcement Learning-Based Dynamic Power Management of a Battery-Powered System Supplying Multiple Active Modes

    E-Print Network [OSTI]

    Pedram, Massoud

    Reinforcement Learning-Based Dynamic Power Management of a Battery-Powered System Supplying dynamic power management (DPM) framework is based on model-free reinforcement learning (RL) technique. In this DPM framework, the Power Manager (PM) adapts the system operating mode to the actual battery state

  4. BPA 20-year power subscription Q. Should DSIs receive cost-based power from BPA after 2006? If so, how

    E-Print Network [OSTI]

    the flexibility to purchase from whatever option offers the best price and reliability. § Q. Should power fromBPA 20-year power subscription § Q. Should DSIs receive cost-based power from BPA after 2006? If so, how much? § A. DSI's should not receive firm, cost-based federal power from BPA after 2006. BPA

  5. Base drive circuit for a four-terminal power Darlington

    DOE Patents [OSTI]

    Lee, Fred C. (Blacksburg, VA); Carter, Roy A. (Salem, VA)

    1983-01-01T23:59:59.000Z

    A high power switching circuit which utilizes a four-terminal Darlington transistor block to improve switching speed, particularly in rapid turn-off. Two independent reverse drive currents are utilized during turn off in order to expel the minority carriers of the Darlington pair at their own charge sweep-out rate. The reverse drive current may be provided by a current transformer, the secondary of which is tapped to the base terminal of the power stage of the Darlington block. In one application, the switching circuit is used in each power switching element in a chopper-inverter drive of an electric vehicle propulsion system.

  6. Optimal Power Flow Based Demand Response Offer Price Optimization

    E-Print Network [OSTI]

    Lavaei, Javad

    Optimal Power Flow Based Demand Response Offer Price Optimization Zhen Qiu 1 Introduction-time energy balance. Demand response programs are offered by the utility companies to reduce the load response cost in exchange for load reduction. A considerable amount of papers have discussed the demand

  7. Transmission Power Adaptation Based Energy Efficient Neighborhood Discovery

    E-Print Network [OSTI]

    Boyer, Edmond

    Transmission Power Adaptation Based Energy Efficient Neighborhood Discovery Jovan Radak, Nathalie such as optimization of energy consumption, connectivity of the WSN, routing in mobile networks and many more. Nodes Mitton INRIA Lille - Nord Europe, France, firstname.lastname.mitton@inria.fr Abstract--Neighborhood

  8. A Certificate-Based Approach to Marketing Green Power and

    E-Print Network [OSTI]

    , Colorado 80401-3393 NREL is a U.S. Department of Energy Laboratory Operated by Midwest Research InstituteA Certificate-Based Approach to Marketing Green Power and Constructing New Wind Energy Facilities Preprint May 2002 · NREL/CP-620-32430 E. Blank Community Energy, Inc. L. Bird and B. Swezey National

  9. Fuel Cell Distributed Power Package Unit: Fuel Processing Based On

    E-Print Network [OSTI]

    Fuel Cell Distributed Power Package Unit: Fuel Processing Based On Autothermal Cyclic Reforming have been metAll milestones have been met #12;4 Autothermal Cyclic Reforming for PEM Fuel Cell CH4 + H2 is not mixed with fuel70-80%High H2 Purity from Reformer AdvantagesAutothermal Cyclic Reformer (ACR) Metric #12

  10. POWER ELECTRONICS HARMONIC ANALYSIS BASED ON THE LINEAR TIME PERIODIC MODELING. APPLICATIONS FOR AC/DC/AC POWER

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    /Simulink simulations. Key words: power system harmonics, power electronic, linear time periodic modeling, PWM, control1 POWER ELECTRONICS HARMONIC ANALYSIS BASED ON THE LINEAR TIME PERIODIC MODELING. APPLICATIONS in power electronic systems. The considered system is described by a set of differential equations, which

  11. Repowering flexibility of coal-based advanced power systems

    SciTech Connect (OSTI)

    Bajura, R.A.; Bechtel, T.F.; Schmidt, D.K.; Wimer, J.G.

    1995-03-01T23:59:59.000Z

    The Department of Energy`s (DOE`s) Morgantown Energy Technology Center (METC) helps enhance the economic competitiveness, environmental quality, and national well-being of the U.S. by developing advanced power-generation systems. The potential market for advanced power-generation systems is large. In the U.S., electric demand is estimated to grow at about 1 percent per year through the year 2010. The total power generation market also includes new-capacity as well as replacement of existing power plants as they age. Thus, the market for power systems over the next 15 years is estimated to be about 279,000 megawatts (MW), but could range from as much as 484,000 MW to as little as 153,000 MW. These predictions are summarized. Over the next 15 years, the replacement market is potentially much larger than the expansion market because of the large base of aging power plants in the U.S.

  12. Econophysical Dynamics of Market-Based Electric Power Distribution Systems

    E-Print Network [OSTI]

    Nicolas Ho; David P. Chassin

    2006-02-09T23:59:59.000Z

    As energy markets begin clearing at sub-hourly rates, their interaction with load control systems becomes a potentially important consideration. A simple model for the control of thermal systems using market-based power distribution strategies is proposed, with particular attention to the behavior and dynamics of electric building loads and distribution-level power markets. Observations of dynamic behavior of simple numerical model are compared to that of an aggregate continuous model. The analytic solution of the continuous model suggests important deficiencies in each. The continuous model provides very valuable insights into how one might design such load control system and design the power markets they interact with. We also highlight important shortcomings of the continuous model which we believe must be addressed using discrete models.

  13. Power-recycled weak-value-based metrology

    E-Print Network [OSTI]

    Lyons, Kevin; Jordan, Andrew N; Howell, John C; Kwiat, Paul G

    2015-01-01T23:59:59.000Z

    We improve the precision of the interferometric weak-value-based beam deflection measurement by introducing a power recycling mirror, creating a resonant cavity. This results in \\emph{all} the light exiting to the detector with a large deflection, thus eliminating the inefficiency of the rare postselection. The signal-to-noise ratio of the deflection is itself magnified by the weak value. We discuss ways to realize this proposal, using a transverse beam filter and different cavity designs.

  14. Power-recycled weak-value-based metrology

    E-Print Network [OSTI]

    Kevin Lyons; Justin Dressel; Andrew N. Jordan; John C. Howell; Paul G. Kwiat

    2015-04-30T23:59:59.000Z

    We improve the precision of the interferometric weak-value-based beam deflection measurement by introducing a power recycling mirror, creating a resonant cavity. This results in \\emph{all} the light exiting to the detector with a large deflection, thus eliminating the inefficiency of the rare postselection. The signal-to-noise ratio of the deflection is itself magnified by the weak value. We discuss ways to realize this proposal, using a transverse beam filter and different cavity designs.

  15. Development of Power-head based Fan Airflow Station

    E-Print Network [OSTI]

    Wang, G.; Liu, M.

    2005-01-01T23:59:59.000Z

    related to the measured fan speed. Actually the measured fan speed is assumed to equal the motor synchronous speed, which is proportional to the VFD frequency. Theoretically it is not true. The difference between the synchronous speed and motor speed... the basic theory, experiment and results of the power-head based airflow station. Theory Figure 1 shows variable speed fan connection schematic. VFD is normally installed on the motor to adjust the motor speed by modulating frequency. Typically...

  16. High power light emitting diode based setup for photobleaching fluorescent impurities

    E-Print Network [OSTI]

    Kaufman, Laura

    High power light emitting diode based setup for photobleaching fluorescent impurities Tobias K be photobleached before final sample preparation. The instrument consists of high power light emitting diodes

  17. Envelope amplifier design for wireless base-station power amplifiers

    E-Print Network [OSTI]

    Hsia, Chin

    2010-01-01T23:59:59.000Z

    Measured Switcher Power Loss and Efficiency Performancea) Efficiency; (b) Power loss . . . . . . . . . . . . . . .Switcher Efficiency and Power Loss . . . . Figure 3.24: High

  18. 0733-8716 (c) 2013 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information.

    E-Print Network [OSTI]

    Stojmenovic, Ivan

    in Micro-Grids with Power Storage Devices Chao Wei, Student Member, IEEE, Zubair Md. Fadlullah, Member communication resource. Index Terms--power storage devices, micro grid, smart grid, greedy algorithm. I power from the macro-station and/or from other micro-grids. Micro-grids can also exploit power storage

  19. Performance of Networked Control Systems under Sporadic Feedback

    E-Print Network [OSTI]

    Lemmon, Michael

    Regenerative Braking power inverter storage Micro-Grid Renewable Generation PHEV Smart Grid - Distributed

  20. Fuel-cell based power generating system having power conditioning apparatus

    DOE Patents [OSTI]

    Mazumder, Sudip K. (Chicago, IL); Pradhan, Sanjaya K. (Des Plaines, IL)

    2010-10-05T23:59:59.000Z

    A power conditioner includes power converters for supplying power to a load, a set of selection switches corresponding to the power converters for selectively connecting the fuel-cell stack to the power converters, and another set of selection switches corresponding to the power converters for selectively connecting the battery to the power converters. The power conveners output combined power that substantially optimally meets a present demand of the load.

  1. Power Limitation Control for a PMSG-Based Marine Current Turbine at High Tidal Speed and

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Power Limitation Control for a PMSG-Based Marine Current Turbine at High Tidal Speed and Strong Sea the generator power at rated value. In this paper, two power limitation strategies with flux-weakening control by the power limitation and the rotor speed; this method enables to control the generator power at the limited

  2. An Agent-Based Computational Laboratory for Wholesale Power Market Design

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    1 An Agent-Based Computational Laboratory for Wholesale Power Market Design Junjie Sun and Leigh (in Java) of an agent-based compu- tational wholesale power market organized in accordance with core the Wholesale Power Market Platform (WPMP) as a template for all U.S. wholesale power markets (FERC [1

  3. Space-Based Solar Power | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently AskedEnergyIssues DOE's Nuclear EnergySmartOverview - 2015Space-Based Solar Power

  4. Design of a creep resistant nickel base superalloy for power plant applications

    E-Print Network [OSTI]

    Cambridge, University of

    Design of a creep resistant nickel base superalloy for power plant applications Part 2­Phase and used as tools to design a new `made to measure' nickel base superalloy for power plant applications (wt-%) nickel base superalloy has been proposed, for use in future fossil fuel power plant, to operate

  5. Entropy-based Power Attack Houssem Maghrebi, Sylvain Guilley, Jean-Luc Danger, Florent Flament

    E-Print Network [OSTI]

    Entropy-based Power Attack Houssem Maghrebi, Sylvain Guilley, Jean-Luc Danger, Florent Flament D-Order Differential Power Analysis (HO-DPA). For instance, an attack based on a variance analysis clearly shows attacks, called the Entropy-based Power Analysis (EPA). This new attack gives a greatest importance

  6. Entropy-based Power Attack Houssem Maghrebi, Sylvain Guilley, Jean-Luc Danger, Florent Flament

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Entropy-based Power Attack Houssem Maghrebi, Sylvain Guilley, Jean-Luc Danger, Florent Flament D to Higher-Order Differential Power Analysis (HO-DPA). For instance, an attack based on a variance anal- ysis to information- theoretic HO attacks, called the Entropy-based Power Analysis (EPA). This new attack gives

  7. North American Power Symposium NAPS, San Luis Obispo, California, October 1999. Web-based Computing for Power System Applications

    E-Print Network [OSTI]

    Cañizares, Claudio A.

    North American Power Symposium NAPS, San Luis Obispo, California, October 1999. Web-based Computing|This paper discusses the possible appli- cations of web-based computing, which is based on In- ternet be achieved by using web-based computing, as this technology per- mits sharing of data and computing resources

  8. Transaction Based Power Flow Analysis For Transmission Utilization Allocation

    E-Print Network [OSTI]

    transactions as well as the effect of reactive power on transmission losses and active power flows. Two the electric power industry moves into an era of supply competition and consumer choice, the power system electricity market at the ex ante phase; (ii) MW generations are decided by bilateral contracts and other

  9. Data bases for rapid response to power reactor problems

    SciTech Connect (OSTI)

    Maskewitz, B.F.

    1980-01-01T23:59:59.000Z

    The urgency of the TMI-2 incident demanded prompt answers to an imperious situation. In responding to these challenging circumstances, both government and industry recognized deficiencies in both availability of essential retrievable data and calculational capabilities designed to respond immediately to actual abnormal events. Each responded by initiating new programs to provide a remedy for the deficiencies and to generally improve all safety measures in the nuclear power industry. Many data bases and information centers offer generic data and other technology resources which are generally useful in support of nuclear safety programs. A few centers can offer rapid access to calculational methods and associated data and more will make an effort to do so. As a beneficial spin-off from the lessons learned from TMI-2, more technical effort and financial resources will be devoted to the prevention of accidents, and to improvement of safety measures in the immediate future and for long term R and D programs by both government and the nuclear power industry.

  10. Simulation-based biagnostics and control for nuclar power plants

    SciTech Connect (OSTI)

    Lee, J.C.

    1993-01-01T23:59:59.000Z

    Advanced simulation-based diagnostics and control guidance systems for the identification and management of off-normal transient events in nuclear power plants is currently under investigation. To date a great deal of progress has been made in effectively and efficiently combining information obtained through fuzzy pattern recognition and macroscopic mass and energy inventory analysis for use in multiple failure diagnostics. Work has also begun on the unique problem of diagnostics and surveillance methodologies for advanced passively-safe reactors systems utilizing both statistical and fuzzy information. Plans are also being formulated for the development of deterministic optimal control algorithms combined with Monte Carlo incremental learning algorithms to be used for the flexible and efficient control of reactor transients.

  11. Advanced power conversion based on the Aerocapacitor{trademark}

    SciTech Connect (OSTI)

    Josephs, L.C.; Gregory, D.; Roark, D. [and others

    1997-10-01T23:59:59.000Z

    The authors report here, for the first time, high frequency testing of a new type of electrochemical double layer capacitor (EDLC), based on carbon aerogels: the Aerocapacitor. Carbon aerogels, are a novel type of carbon foam developed by Lawrence Livermore National Laboratory for military applications. The unique properties of carbon aerogels, high surface area (700 m{sup 2}/g), high density (1g/cc), well controlled pore diameter and high material conductivity (25 S/cm) made it an ideal EDLC electrode material. Using carbon aerogel as the electrode material, the authors have developed Aerocapacitors. These new EDLC`s have a frequency response comparable to that of aluminum electrolytic capacitors and are thus ideally suited to power conversion applications.

  12. INTEGRATED CONTROL OF NEXT GENERATION POWER SYSTEM

    SciTech Connect (OSTI)

    None

    2010-02-28T23:59:59.000Z

    Control methodologies provide the necessary data acquisition, analysis and corrective actions needed to maintain the state of an electric power system within acceptable operating limits. These methods are primarily software-based algorithms that are nonfunctional unless properly integrated with system data and the appropriate control devices. Components of the control of power systems today include protective relays, supervisory control and data acquisition (SCADA), distribution automation (DA), feeder automation, software agents, sensors, control devices and communications. Necessary corrective actions are still accomplished using large electromechanical devices such as vacuum, oil and gas-insulated breakers, capacitor banks, regulators, transformer tap changers, reclosers, generators, and more recently FACTS (flexible AC transmission system) devices. The recent evolution of multi-agent system (MAS) technologies has been reviewed and effort made to integrate MAS into next generation power systems. A MAS can be defined as ��a loosely-coupled network of problem solvers that work together to solve problems that are beyond their individual capabilities��. These problem solvers, often called agents, are autonomous and may be heterogeneous in nature. This project has shown that a MAS has significant advantages over a single, monolithic, centralized problem solver for next generation power systems. Various communication media are being used in the electric power system today, including copper, optical fiber and power line carrier (PLC) as well as wireless technologies. These technologies have enabled the deployment of substation automation (SA) at many facilities. Recently, carrier and wireless technologies have been developed and demonstrated on a pilot basis. Hence, efforts have been made by this project to penetrate these communication technologies as an infrastructure for next generation power systems. This project has thus pursued efforts to use specific MAS methods as well as pertinent communications protocols to imbed and assess such technologies in a real electric power distribution system, specifically the Circuit of the Future (CoF) developed by Southern California Edison (SCE). By modeling the behavior and communication for the components of a MAS, the operation and control of the power distribution circuit have been enhanced. The use of MAS to model and integrate a power distribution circuit offers a significantly different approach to the design of next generation power systems. For example, ways to control a power distribution circuit that includes a micro-grid while considering the impacts of thermal constraints, and integrating voltage control and renewable energy sources on the main power system have been pursued. Both computer simulations and laboratory testbeds have been used to demonstrate such technologies in electric power distribution systems. An economic assessment of MAS in electric power systems was also performed during this project. A report on the economic feasibility of MAS for electric power systems was prepared, and particularly discusses the feasibility of incorporating MAS in transmission and distribution (T&D) systems. Also, the commercial viability of deploying MAS in T&D systems has been assessed by developing an initial case study using utility input to estimate the benefits of deploying MAS. In summary, the MAS approach, which had previously been investigated with good success by APERC for naval shipboard applications, has now been applied with promising results for enhancing an electric power distribution circuit, such as the Circuit of the Future developed by Southern California Edison. The results for next generation power systems include better ability to reconfigure circuits, improve protection and enhance reliability.

  13. Reactive Power Compensation Based on FACTs Devices Xunchi Wu (xw2256) Power Systems Analysis Final Project

    E-Print Network [OSTI]

    Lavaei, Javad

    ..........................................................................................5 2.1 The Thyristor Controlled Reactor (TCR)......................................................................8 III. Power Flow Calculation

  14. Accurate Online Power Estimation and Automatic Battery Behavior Based Power Model Generation for Smartphones

    E-Print Network [OSTI]

    Tomkins, Andrew

    of Systems]: Modeling techniques General Terms Measurement, Design Keywords Power modeling, mobile phones systems. Combined, PowerBooter and PowerTutor have the goal of opening power modeling and analysis of determining the impact of software design decisions on system energy consumption, but that barrier can

  15. Web-based Tool for Preliminary Assessment of Wind Power Plant Design

    E-Print Network [OSTI]

    Mustakerov, Ivan

    Web-based Tool for Preliminary Assessment of Wind Power Plant Design Daniela Borissova1 and Ivan. Designing of reliable and cost-effective industrial wind power plant is a prerequisite for the effective use of wind power as an alternative resource. The design of a wind power plant includes the determination

  16. Load Balancing and Unbalancing for Power and Performance in ClusterBased Systems #

    E-Print Network [OSTI]

    Bianchini, Ricardo

    systems conserve both power and energy in comparison to traditional systems. 1 Introduction PowerLoad Balancing and Unbalancing for Power and Performance in Cluster­Based Systems # Eduardo on -- to be able to handle the load imposed on the system efficiently -- and off -- to save power under lighter

  17. PEV-based Reactive Power Compensation for Wind DG Units: A Stackelberg Game Approach

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    balancing supply and demand for active power, we also need to compensate reactive power for each wind DGPEV-based Reactive Power Compensation for Wind DG Units: A Stackelberg Game Approach Chenye Wu, in particular wind power, in form of distributed generation (DG) units. However, one important challenge

  18. PEV-based Reactive Power Compensation for Wind DG Units: A Stackelberg Game Approach

    E-Print Network [OSTI]

    Huang, Jianwei

    balancing supply and demand for active power, we also need to compensate reactive power for each wind DG1 PEV-based Reactive Power Compensation for Wind DG Units: A Stackelberg Game Approach Chenye Wu, in particular wind power, in form of distributed generation (DG) units. However, one important challenge

  19. Routine based OS-aware Microprocessor Resource Adaptation for Run-time Operating System Power Saving

    E-Print Network [OSTI]

    John, Lizy Kurian

    workloads (see section 2 for detail), making it a major power consumer. The proportion of the OS power, such as thermal sensor reading, energy accounting and power control for memory and I/O devices [2]. ClearlyRoutine based OS-aware Microprocessor Resource Adaptation for Run-time Operating System Power

  20. Model-Free Based Water Level Control for Hydroelectric Power Plants

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Model-Free Based Water Level Control for Hydroelectric Power Plants Cédric JOIN Gérard ROBERT for hydroelectric run-of-the river power plants. To modulate power generation, a level trajectory is planned for cascaded power plants. Numerous dynamic simulations show that with a simple and robust control algorithm

  1. Space-based solar power generation using a distributed network of satellites and methods for efficient space power transmission

    E-Print Network [OSTI]

    McLinko, Ryan M.

    Space-based solar power (SSP) generation is being touted as a solution to our ever-increasing energy consumption and dependence on fossil fuels. Satellites in Earth's orbit can capture solar energy through photovoltaic ...

  2. Signaling Game-based Approach to Power Control Management in Wireless Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Signaling Game-based Approach to Power Control Management in Wireless Networks Khalil Ibrahimi, we revisit the power control problem in wire- less networks by introducing a signaling game approach to player II which can be accurate or dis- torted. Player II picks up his power control strategy based

  3. Design of a creep resistant nickel base superalloy for power plant applications

    E-Print Network [OSTI]

    Cambridge, University of

    Design of a creep resistant nickel base superalloy for power plant applications Part 1 ­ Mechanical and used as tools to design a new `made to measure' nickel base superalloy for power plant applications and Mining. Introduction Future fossil fuel power plants are being conceived to operate with steam

  4. Charge Recycling Sense Amplifier Based Logic: Securing Low Power Security IC's against

    E-Print Network [OSTI]

    Charge Recycling Sense Amplifier Based Logic: Securing Low Power Security IC's against Differential Charge Recycling Sense Amplifier Based Logic is presented. This logic is derived from Sense Amplifier and confidenti- ality. For these battery-powered devices much focus is on lower power design. We have analyzed

  5. RSSI Based Location-Aware PC Power Management Zhong-Yi Jin and Rajesh K. Gupta

    E-Print Network [OSTI]

    Gupta, Rajesh

    RSSI Based Location-Aware PC Power Management Zhong-Yi Jin and Rajesh K. Gupta University- sideration the locations of computer users, location- aware PC power management techniques can over- come the capabilities to support effi- cient PC power management. In this paper, we present NAPS, a zone based location

  6. Formal Analysis and Validation of Continuous-Time Markov Chain based System Level Power Management Strategies

    E-Print Network [OSTI]

    Oxford, University of

    Formal Analysis and Validation of Continuous-Time Markov Chain based System Level Power Management that competitive analysis based power management strategies can be automatically analyzed for proving competitive bounds and for validating power management strate- gies using the SMV model checker. In this paper, we

  7. Formal Analysis and Validation of ContinuousTime Markov Chain based System Level Power Management Strategies

    E-Print Network [OSTI]

    Oxford, University of

    Formal Analysis and Validation of Continuous­Time Markov Chain based System Level Power Management that competitive analysis based power management strategies can be automatically analyzed for proving competitive bounds and for validating power management strate­ gies using the SMV model checker. In this paper, we

  8. Complete System Power Estimation: A Trickle-Down Approach Based on Performance Events

    E-Print Network [OSTI]

    John, Lizy Kurian

    Complete System Power Estimation: A Trickle-Down Approach Based on Performance Events W. Lloyd of microprocessor performance counters for online measurement of complete system power consumption. While past knowledge, we are the first to create power models for the entire system based on processor performance

  9. DYNAMIC SECURITY ANALYSIS OF ELECTRIC POWER SYSTEMS: PASSIVITY-BASED APPROACH AND POSITIVE INVARIANCE APPROACH

    E-Print Network [OSTI]

    Shen, Jinglai

    DYNAMIC SECURITY ANALYSIS OF ELECTRIC POWER SYSTEMS: PASSIVITY-BASED APPROACH AND POSITIVE in modern power system opera- tion. With the aid of analytic tools for large-scale and hybrid systems, this paper proposes two new safety verification methods for power systems. The first method is based

  10. Feedback-based Adaptation for Improved Power Consumption Christos Bouras

    E-Print Network [OSTI]

    Bouras, Christos

    networks. Power control is also developed for 802.11b wireless networks in [7]. This model operates between made it inefficient in real life implementation. The initial model manages to minimize the power treatments of the subject. [1] proposes a transmission control power algorithm and tests it with the ns-2 [2

  11. Reducing Electrical Power Use with a Performance Based Incentive

    SciTech Connect (OSTI)

    M. Kathleen Nell

    2004-07-01T23:59:59.000Z

    This Departmental Energy Management Program (DEMP) funded Model Program Study developed out of a potential DOE-ID Performance Based Incentive for the Idaho National Engineering and Environmental Laboratory (INEEL), lasting from October 2001 through May 2002, which stressed reductions in electrical usage. An analysis of demand usage obtained from monthly INEEL Power Management electric reports revealed reductions in demand from a majority of the site areas. The purpose of this Model Program study was to determine the methods and activities that were used at these site areas to achieve the reductions in demand and to develop these demand reduction methods and activities into a Model Program that could be shared throughout the INEEL and DOE complex-wide for additional demand savings. INEEL Energy Management personnel interviewed contacts from the eight areas which had achieved a consistent reduction in demand during the study period, namely, Idaho Nuclear Technology and Engineering Center (INTEC), Test Area North (TAN), Power Burst Facility (PBF), Test Reactor Area (TRA) including Advanced Test Reactor ATR), Engineering Test Reactor (ETR), and Materials Test Reactor (MTR) areas, Central Facilities Area (CFA), Specific Manufacturing Capability (SMC), Radioactive Waste Management Complex (RWMC), and Argonne National Laboratory-West (ANLW). The information that resulted from the interviews indicated that more than direct demand and energy reduction actions were responsible for the recorded reductions in demand. INEEL Energy Management identified five categories of actions or conditions that contributed to the demand reduction. These categories are Decontamination and Decommissioning (D&D), employee actions, improvements, inactivation for maintenance, and processes. The following information details the findings from the study.

  12. Power Optimization in Programmable Processors and ASIC Implementations of Linear Systems: Transformation-based Approach

    E-Print Network [OSTI]

    Potkonjak, Miodrag

    Power Optimization in Programmable Processors and ASIC Implementations of Linear Systems and communications. We introduce two approaches for power minimization in linear computations using transformations: Transformation-based Approach Mani Srivastava Miodrag Potkonjak AT&T Bell Laboratories Computer Science

  13. A study of power electronic building block (PEBB)-based integrated shipboard power systems during reconfiguration

    E-Print Network [OSTI]

    Adediran, Adeoti Taiwo

    2004-09-30T23:59:59.000Z

    concept with electric propulsion, direct current (DC) distribution, and modular technology. In the all electric ship concept, ship propulsion and ship service loads are powered by alternating current (AC) generation. For the IPS, power electronics...

  14. TurboCap: A Batteryless, Supercapacitor-based Power Supply for Mini-FDPM

    E-Print Network [OSTI]

    Shinozuka, Masanobu

    TurboCap: A Batteryless, Supercapacitor-based Power Supply for Mini-FDPM Chulsung Park1 , KeunsikCap, a batteryless, supercapacitor-based power supply subsystem for a handheld, laser-based breast cancer detector on the selection of supercapacitor topology for conversion efficiency and for form- factor minimization

  15. Radioisotope-based Nuclear Power Strategy for Exploration Systems Development

    SciTech Connect (OSTI)

    Schmidt, George R.; Houts, Michael G. [NASA Marshall Space Flight Center, Huntsville, AL 35812 (United States)

    2006-01-20T23:59:59.000Z

    Nuclear power will play an important role in future exploration efforts. Its benefits pertain to practically all the different timeframes associated with the Exploration Vision, from robotic investigation of potential lunar landing sites to long-duration crewed missions on the lunar surface. However, the implementation of nuclear technology must follow a logical progression in capability that meets but does not overwhelm the power requirements for the missions in each exploration timeframe. It is likely that the surface power infrastructure, particularly for early missions, will be distributed in nature. Thus, nuclear sources will have to operate in concert with other types of power and energy storage systems, and must mesh well with the power architectures envisioned for each mission phase. Most importantly, they must demonstrate a clear advantage over other non-nuclear options (e.g., solar power, fuel cells) for their particular function. This paper describes a strategy that does this in the form of three sequential system developments. It begins with use of radioisotope generators currently under development, and applies the power conversion technology developed for these units to the design of a simple, robust reactor power system. The products from these development efforts would eventually serve as the foundation for application of nuclear power systems for exploration of Mars and beyond.

  16. Robust SAT-Based Search Algorithm for Leakage Power Reduction

    E-Print Network [OSTI]

    Aloul, Fadi

    , including packaging and cooling costs, battery life in portable systems, and power supply grid design scaling of the supply voltage (Vdd) by 30% promises to reduce the power by 50% [4]. Such supply voltage a high NMOS or PMOS transistor to shut off the supply to low logic [9]. This approach results in very

  17. Multimachine power system stabiliser design based on new LQR approach

    E-Print Network [OSTI]

    Aldeen, Mohammad

    -axis damper `2' e,,, e,, = machine states E, = stator referred field voltage vx = internal exciter state P,, = mechanical input power C,. = power at valve outlet i s , = excitation system set point vt = stator voltage of the design process. In an attempt to address this problem, a number of researchers have proposed noncon

  18. Genetic Algorithm Based Damage Control For Shipboard Power Systems

    E-Print Network [OSTI]

    Amba, Tushar

    2010-07-14T23:59:59.000Z

    The work presented in this thesis was concerned with the implementation of a damage control method for U.S. Navy shipboard power systems (SPS). In recent years, the Navy has been seeking an automated damage control and power system management...

  19. Power and Effective Study Size Based on Approximations to the Expected Likelihood Ratio

    E-Print Network [OSTI]

    Washington at Seattle, University of

    Power and Effective Study Size Based on Approximations to the Expected Likelihood Ratio Test statistical power and precision of heritability estimates can be difficult particularly in complex pedigrees. Previous work focused on the power to detect heritability by using the expectation of the likelihood ratio

  20. Capacity Withholding in Restructured Wholesale Power Markets: An Agent-Based Test Bed Study

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    1 Capacity Withholding in Restructured Wholesale Power Markets: An Agent-Based Test Bed Study test case imple- mented via the AMES Wholesale Power Market Test Bed to investigate strategic capacity withholding by generation compa- nies (GenCos) in restructured wholesale power markets under systematically

  1. An Agent-Based Test Bed Study of Wholesale Power Market Performance Measures

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    1 An Agent-Based Test Bed Study of Wholesale Power Market Performance Measures Abhishek Somani and Leigh Tesfatsion, Member, IEEE Abstract--Wholesale power markets operating over trans- mission grids and operational inefficiency. This study uses a wholesale power market test bed with strategically learning

  2. "BLUE BOX" POWER ELECTRONICS CONTROL MODULES FOR LABORATORY-BASED EDUCATION

    E-Print Network [OSTI]

    Kimball, Jonathan W.

    "BLUE BOX" POWER ELECTRONICS CONTROL MODULES FOR LABORATORY-BASED EDUCATION R. S. BALOG, J. W of Illinois at Urbana/Champaign Urbana, Illinois 61801 #12;#12;UILU-ENG-2004-2504 "BLUE BOX" POWER ELECTRONICS of design documents detailing the design and fabrication of "blue box" power electronics control modules

  3. A Contract-Based Methodology for Aircraft Electric Power System Design

    E-Print Network [OSTI]

    Xu, Huan

    1 A Contract-Based Methodology for Aircraft Electric Power System Design Pierluigi Nuzzo, Huan Xu´e, Sanjit A. Seshia Abstract--In an aircraft electric power system, one or more supervisory control units of our approach on a proof-of-concept electric power system design. I. INTRODUCTION The advent of high

  4. A power system control scheme based on security visualisation in parameter space

    E-Print Network [OSTI]

    Guo, Yi

    nonlinear and complex especially under competitive electricity market situations. A power system can with system contingencies. Electrical Power and Energy Systems 27 (2005) 488­495 wwwA power system control scheme based on security visualisation in parameter space Zhao Yang Donga

  5. Design of a creep resistant nickel base superalloy for power plant applications

    E-Print Network [OSTI]

    Cambridge, University of

    Design of a creep resistant nickel base superalloy for power plant applications Part 3­Experimental, and results in a promising new alloy for power plant applications. MST/5391 Dr Tancret is in the Laboratoire.1Ti ± 5Fe ± 0.4Si ± 0.07C ± 0.005B (wt-%)) for use in future fossil fuel power plant with steam

  6. New Reconfigurable Power Divider Based on Radial Waveguide and Cylindrical Electromagnetic Band Gap Structure for Low

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Structure for Low Power and Low Cost Smart Antenna Systems Halim Boutayeb, Paul Watson and Toby Kemp AntennaNew Reconfigurable Power Divider Based on Radial Waveguide and Cylindrical Electromagnetic Band Gap halim.boutayeb@huawei.com Abstract--A new low power and low cost technique is proposed for designing

  7. A Verification Framework for FBD based Software in Nuclear Power Plants Junbeom Yoo

    E-Print Network [OSTI]

    A Verification Framework for FBD based Software in Nuclear Power Plants Junbeom Yoo Div, conducted using a nuclear power plant shutdown system being developed in Korea, demonstrated in nuclear power plant's reactor protection systems. The software verification framework uses two different

  8. An Efficient Threshold-Based Power Management Mechanism for Heterogeneous Soft Real-Time Clusters

    E-Print Network [OSTI]

    Lu, Ying

    An Efficient Threshold-Based Power Management Mechanism for Heterogeneous Soft Real-Time Clusters {lwang, ylu}@cse.unl.edu Abstract With growing cost of electricity, the power management of server proposes an efficient algorithm for power management of heterogeneous soft real-time clusters. It is built

  9. An FPGA-based Distributed Computing System with Power and Thermal Management Capabilities

    E-Print Network [OSTI]

    Qiu, Qinru

    An FPGA-based Distributed Computing System with Power and Thermal Management Capabilities Hao Shen of New York Binghamton, NY, 13902, USA ABSTRACT Runtime power and thermal management has attracted step in the research of distributed power and thermal management. Compared to software simulation

  10. PLC-Based Safety Critical Software Development for Nuclear Power Plants

    E-Print Network [OSTI]

    PLC-Based Safety Critical Software Development for Nuclear Power Plants Junbeom Yoo1 , Sungdeok Cha development technique for nuclear power plants'I&C soft- ware controllers. To improve software safety, we in developing safety-critical control software for a Korean nuclear power plant, and experience to date has been

  11. Anawake: Signal-Based Power Management For Digital Signal Processing Systems

    E-Print Network [OSTI]

    Lazzaro, John

    , and controls the power consumption of the DSP system in a signal-dependent way. We estimate system power-listening model; for other applications (wordspotting systems for surveillance, speech control for the physicallyAnawake: Signal-Based Power Management For Digital Signal Processing Systems John Lazzaro and John

  12. Frequency-Based Load Control in Power Systems Changhong Zhao Ufuk Topcu Steven H. Low

    E-Print Network [OSTI]

    Low, Steven H.

    Frequency-Based Load Control in Power Systems Changhong Zhao Ufuk Topcu Steven H. Low Abstract-- Maintaining demand-supply balance and regulat- ing frequency are key issues in power system control. Conven the overall end-use disutility. By studying the power system model that characterizes the frequency response

  13. Measurement based Voltage Stability Monitoring of Power system Garng M. Huang

    E-Print Network [OSTI]

    Measurement based Voltage Stability Monitoring of Power system Garng M. Huang huang Station, TX 77843-3128 Abstract: Many papers discuss the voltage stability assessment of power system. The problem of voltage stability may be simply explained as inability of the power system to provide

  14. AN INNOVATIVE RTP-BASED RESIDENTIAL POWER SCHEDULING SCHEME FOR SMART GRIDS

    E-Print Network [OSTI]

    Snyder, Larry

    as demand response for residential power usage. In this scheme, the Energy Management Controller (EMCAN INNOVATIVE RTP-BASED RESIDENTIAL POWER SCHEDULING SCHEME FOR SMART GRIDS Chen Chen , Shalinee power usage profile plays the leader level game. The sequential equilib- rium is obtained through

  15. Budget-based power consumption for application execution on a plurality of compute nodes

    DOE Patents [OSTI]

    Archer, Charles J; Inglett, Todd A

    2012-10-23T23:59:59.000Z

    Methods, apparatus, and products are disclosed for budget-based power consumption for application execution on a plurality of compute nodes that include: assigning an execution priority to each of one or more applications; executing, on the plurality of compute nodes, the applications according to the execution priorities assigned to the applications at an initial power level provided to the compute nodes until a predetermined power consumption threshold is reached; and applying, upon reaching the predetermined power consumption threshold, one or more power conservation actions to reduce power consumption of the plurality of compute nodes during execution of the applications.

  16. Budget-based power consumption for application execution on a plurality of compute nodes

    SciTech Connect (OSTI)

    Archer, Charles J; Blocksome, Michael A; Peters, Amanda E; Ratterman, Joseph D; Smith, Brian E

    2013-02-05T23:59:59.000Z

    Methods, apparatus, and products are disclosed for budget-based power consumption for application execution on a plurality of compute nodes that include: assigning an execution priority to each of one or more applications; executing, on the plurality of compute nodes, the applications according to the execution priorities assigned to the applications at an initial power level provided to the compute nodes until a predetermined power consumption threshold is reached; and applying, upon reaching the predetermined power consumption threshold, one or more power conservation actions to reduce power consumption of the plurality of compute nodes during execution of the applications.

  17. Shipboard condition based maintenance and integrated power system initiatives

    E-Print Network [OSTI]

    Barber, Darrin E. (Darrin Eugene)

    2011-01-01T23:59:59.000Z

    With the U.S. Navy's continued focus on developing and implementing a robust integrated power system aboard future combatants, there has been an ever increasing effort to guarantee an electrical distribution system that ...

  18. Performance based incentive for Combined Heat and Power Program

    Broader source: Energy.gov [DOE]

    CHP technologies are eligible for either a grant, loan or power purchase incentive under the initial round of solicitations for new renewable energy generating equipment  up to five megawatts at ...

  19. Ultrahigh-power micrometre-sized supercapacitors based on onion...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    power microelectronics applications (a 500-mAh thin-film lithium battery, a 25-mF supercapacitor and an electrolytic capacitor of the same absolute capacitance), tested under the...

  20. Baseload Solar Power for California? Ammonia-based Solar Energy Storage Using Trough Concentrators

    E-Print Network [OSTI]

    Baseload Solar Power for California? Ammonia-based Solar Energy Storage Using Trough Concentrators to eventually optimise the reactor geometry for ammonia-based solar energy storage with troughs, which.1. Storing Solar Energy with Ammonia H2 / N2 gas liquid NH3 Heat Exchangers Power Generation (Steam Cycle

  1. A Verification Framework for FBD based Software in Nuclear Power Plants Junbeom Yoo

    E-Print Network [OSTI]

    Jee, Eunkyoung

    require safety demonstration. RPS software of APR-1400 advanced nuclear power reactor, in developmentA Verification Framework for FBD based Software in Nuclear Power Plants Junbeom Yoo Div-based software in nuclear reactor protection system (RPS). FBD programs are developed manually and revised

  2. A Low-power, Low-memory System for Wavelet-based Image Compression

    E-Print Network [OSTI]

    Walker, James S.

    of the components of our particular method of wavelet transform based image compression. 2 Wavelet transformsA Low-power, Low-memory System for Wavelet-based Image Compression James S. Walker Department the following advan- tages: low-power utilization, low RAM requirements, embedded bit-plane compression, scal

  3. Price-based adaptive spinning reserve requirements in power system scheduling1

    E-Print Network [OSTI]

    Oren, Shmuel S.

    &E, the Hydro-Thermal Optimization (HTO) program was developed almost a decade ago, based on the LagrangianPrice-based adaptive spinning reserve requirements in power system scheduling1 Chung-Li Tsenga function, on a price/value signal. We present three power system scheduling algorithms in which this price

  4. Reinforcement Learning Based Power Management for Hybrid Electric Vehicles

    E-Print Network [OSTI]

    Pedram, Massoud

    combustion engine (ICE) propelled vehicles, hybrid electric vehicles (HEVs) can achieve both higher fuel combustion engine (ICE) propelled vehicles, HEVs can simultaneously achieve higher fuel economy and lower that applies the reinforcement learning technique to the HEV power management problem. Simulation results over

  5. Advanced microprocessor based power protection system using artificial neural network techniques

    SciTech Connect (OSTI)

    Chen, Z.; Kalam, A.; Zayegh, A. [Victoria Univ. of Technology, Melbourne , Victoria (Australia). Save Energy Research Group

    1995-12-31T23:59:59.000Z

    This paper describes an intelligent embedded microprocessor based system for fault classification in power system protection system using advanced 32-bit microprocessor technology. The paper demonstrates the development of protective relay to provide overcurrent protection schemes for fault detection. It also describes a method for power fault classification in three-phase system based on the use of neural network technology. The proposed design is implemented and tested on a single line three phase power system in power laboratory. Both the hardware and software development are described in detail.

  6. The powerful high-voltage glow discharge electron gun and power unit on its base

    SciTech Connect (OSTI)

    Chernov, V.A. [All-Russian Electrotechnical Institute, Moscow (Russian Federation)

    1994-12-31T23:59:59.000Z

    The technical and operational characteristics and features of powerful electron gun with cold cathodes on the basis of high-voltage glow discharge (HGD) are submitted. The systems, ensuring their work are described. Some results of operation and applications of these non-traditional electron guns are presented.

  7. Assessment of Metal Media Filters for Advanced Coal-Based Power Generation Applications

    SciTech Connect (OSTI)

    Alvin, M.A.

    2002-09-19T23:59:59.000Z

    Advanced coal and biomass-based gas turbine power generation technologies (IGCC, PFBC, PCFBC, and Hipps) are currently under development and demonstration. Efforts at Siemens Westinghouse Power Corporation (SWPC) have been focused on the development and demonstration of hot gas filter systems as an enabling technology for power generation. This paper reviews SWPC's material and component assessment efforts, identifying the performance, stability, and life of porous metal, advanced alloy, and intermetallic filters under simulated, pressurized fluidized-bed combustion conditions.

  8. POEM: Power-efficient Occupancy-based Energy Management System

    E-Print Network [OSTI]

    Cerpa, Alberto E.

    for Heating Ventilation and Air-Conditioning (HVAC) systems. Current HVAC systems only condition based to reach target temperatures and minimize ventilation requirements. Based on live tests of the system, we, Measurement, Performance Keywords Occupancy, HVAC, Ventilation, Energy savings 1. INTRODUCTION Permission

  9. A Current-Sensorless Digital Controller for Active Power Factor Correction Control Based on Kalman Filters

    E-Print Network [OSTI]

    Kimball, Jonathan W.

    A Current-Sensorless Digital Controller for Active Power Factor Correction Control Based on Kalman, by replacing the sensor with a Kalman filter, which is essentially a stochastic observer. Experimental results-power techniques are undesirable and the current sensor is too expensive. A Kalman filter [7] can be used

  10. Wind Farm Power Maximization Based On A Cooperative Static Game Approach

    E-Print Network [OSTI]

    Stanford University

    Wind Farm Power Maximization Based On A Cooperative Static Game Approach Jinkyoo Parka, Soonduck efficiency of wind farms using cooperative control. The key factors in determining the power production and the loading for a wind turbine are the nacelle yaw and blade pitch angles. However, the nacelle and blade

  11. Reactive power control of grid-connected wind farm based on adaptive dynamic programming

    E-Print Network [OSTI]

    He, Haibo

    Reactive power control of grid-connected wind farm based on adaptive dynamic programming Yufei Tang Wind farm Power system Adaptive control a b s t r a c t Optimal control of large-scale wind farm has of wind farm with doubly fed induction generators (DFIG). Specifically, we investigate the on

  12. PREDICTION OF REMAINING LIFE OF POWER TRANSFORMERS BASED ON LEFT TRUNCATED AND RIGHT

    E-Print Network [OSTI]

    PREDICTION OF REMAINING LIFE OF POWER TRANSFORMERS BASED ON LEFT TRUNCATED AND RIGHT CENSORED of the remaining life of high-voltage power transform- ers is an important issue for energy companies because of the need for planning maintenance and capital expenditures. Lifetime data for such transformers

  13. Peak-to-average power ratio reduction in OFDM based on transformation of partial

    E-Print Network [OSTI]

    Peak-to-average power ratio reduction in OFDM based on transformation of partial transmit sequences number, but T-PTS is less complex. Introduction: To avoid the occurrence of large peak power of signals G. Lu, P. Wu and C. Carlemalm-Logothetis A novel scheme (transformation of partial transmit

  14. REFORMING PROCESSES FOR MICRO COMBINED HEAT AND POWER SYSTEM BASED ON SOLID OXIDE FUEL CELL

    E-Print Network [OSTI]

    Berning, Torsten

    REFORMING PROCESSES FOR MICRO COMBINED HEAT AND POWER SYSTEM BASED ON SOLID OXIDE FUEL CELL University Denmark ABSTRACT Solid oxide fuel cell (SOFC) is a promising technology for decentralized power performance parameters will be identified. Keywords: Solid Oxide Fuel Cell, Micro CHP System INTRODUCTION

  15. PERFORMANCE OF DISTRIBUTED UTILITY-BASED POWER CONTROL FOR WIRELESS AD HOC NETWORKS

    E-Print Network [OSTI]

    Kuzmanovic, Aleksandar

    PERFORMANCE OF DISTRIBUTED UTILITY-BASED POWER CONTROL FOR WIRELESS AD HOC NETWORKS Jianwei Huang network. The users exchange prices that reflect their loss in utility due to interference. The prices are then used to determine optimal (utility maximizing) power levels for each user. We present simulation

  16. An Evolutionary Power Management Algorithm for SoC Based EHW Systems Lirong Tian

    E-Print Network [OSTI]

    Arslan, Tughrul

    such as satellites, autonomous vehicles, etc. Besides the limitation on power consumption, these systems usually have results in energy consumption. For further energy saving, a schedule for these tasks must reduce implementation on an ARM based embedded processor and provides results demonstrating power consumption

  17. European Wind Energy Conference 2007 Milan Measurement based analysis of active and reactive power

    E-Print Network [OSTI]

    European Wind Energy Conference 2007 ­ Milan 1 Measurement based analysis of active and reactive of the electricity is produced by wind turbines and combined heat and power plants (CHPs). Most of them are connected of reactive power between the 60 kV and the 150 kV networks. Further, the TSO is obligated to compensate

  18. Modelling and control of agent-based power protection systems using supervisors

    E-Print Network [OSTI]

    Lim, Jong-Tae

    Modelling and control of agent-based power protection systems using supervisors S.-J. Park and J of protection systems. Also, Petri net models are applied to power systems for process control and computer.-T. Lim Abstract: The framework of supervisory control of discrete event systems (DESs) is applied

  19. Oxide based thermoelectric materials for large scale power generation

    E-Print Network [OSTI]

    Song, Yang, M. Eng. Massachusetts Institute of Technology

    2008-01-01T23:59:59.000Z

    The thermoelectric (TE) devices are based on the Seebeck and Peltier effects, which describe the conversion between temperature gradient and electricity. The effectiveness of the material performance can be described by ...

  20. Frequency-based current-sharing techniques for paralleled power converters

    E-Print Network [OSTI]

    Perreault, David J.

    A new current-sharing technique for paralleled power converters, which is based on frequency encoding of the current-sharing information, is introduced. The approach has significant advantages over existing methods, including ...

  1. NCAR WRF-based data assimilation and forecasting systems for wind energy applications power

    E-Print Network [OSTI]

    Kim, Guebuem

    NCAR WRF-based data assimilation and forecasting systems for wind energy applications power Yuewei of these modeling technologies w.r.t. wind energy applications. Then I'll discuss wind farm

  2. Microprocessor-based control systems application in nuclear power plant critical systems

    SciTech Connect (OSTI)

    Shah, M.R.; Nowak, J.B. (Sargent and Lundy, Chicago, IL (US))

    1992-01-01T23:59:59.000Z

    Microprocessor-based control systems have been used in fossil power plants and are receiving greater acceptance for application in nuclear plants. This technology is not new but it does require unique considerations when applied to nuclear power plants. Sargent and Lundy (S and L) has used a microprocessor-based component logic control system (interposing Logic System) for safety- and non-safety-related components in nuclear power plants under construction overseas. Currently, S and L is in the design stage to replace an existing analog control system with a microprocessor-based control system in the U.S. The trend in the industry is to replace systems in existing plants or design new power plants with microprocessor-based control systems.

  3. Carbon nanotube-based nanorelays for low-power circuit applications

    E-Print Network [OSTI]

    Schmitt, Courtney E

    2009-01-01T23:59:59.000Z

    The objective of this research is to reduce static power dissipation by developing a vertically-oriented carbon nanotube-based nanoelectromechanical switch that has no off-state leakage current. This switch, called a ...

  4. 10January 1998 Small-Scale Gasification-Based Biomass Power Generation

    E-Print Network [OSTI]

    are the technologies of choice today for gasification-based power generationfrom biomass(Fig. I). Fuel cells and micro-gas turbines coupled with biomassgasifiers will offer considerably higher efficiencies at small

  5. Simulation and fabrication of GaN-based vertical and lateral normally-off power transistors

    E-Print Network [OSTI]

    Zhang, Yuhao, S.M. Massachusetts Institute of Technology

    2013-01-01T23:59:59.000Z

    This thesis is divided in two parts. First, self-consistent electro-thermal simulations have been performed for single finger and multi-finger GaN-based vertical and lateral power transistors and were validated with ...

  6. Advanced power conversion based on the Aerocapacitor{trademark}. Final report

    SciTech Connect (OSTI)

    Roark, D.

    1997-03-05T23:59:59.000Z

    This report summarizes work performed under contract No. DE-FC07-94ID13283, {open_quotes}Advanced Power Conversion Based on the Aerocapacitors{trademark}.{close_quotes} Under this contract high power density, high energy density, organic electrolyte Aerocapacitors{trademark} were developed and characterized for power conversion applications. Pilot facilities for manufacturing prototype AA-size Aerocapacitors{trademark} were put in place. The low ESR and good frequency response of these devices show that they are ideal components for high discharge rate and low to moderate frequency (< 10 kHz) applications such as power conversion.

  7. Transistor-based filter for inhibiting load noise from entering a power supply

    DOE Patents [OSTI]

    Taubman, Matthew S

    2013-07-02T23:59:59.000Z

    A transistor-based filter for inhibiting load noise from entering a power supply is disclosed. The filter includes a first transistor having an emitter coupled to a power supply, a collector coupled to a load, and a base. The filter also includes a first capacitor coupled between the base of the first transistor and a ground terminal. The filter further includes an impedance coupled between the base and a node between the collector and the load, or a second transistor and second capacitor. The impedance can be a resistor or an inductor.

  8. Need-based Communication for Smart Grid: When to Inquire Power Price?

    E-Print Network [OSTI]

    Li, Husheng

    2010-01-01T23:59:59.000Z

    In smart grid, a home appliance can adjust its power consumption level according to the realtime power price obtained from communication channels. Most studies on smart grid do not consider the cost of communications which cannot be ignored in many situations. Therefore, the total cost in smart grid should be jointly optimized with the communication cost. In this paper, a probabilistic mechanism of locational margin price (LMP) is applied and a model for the stochastic evolution of the underlying load which determines the power price is proposed. Based on this framework of power price, the problem of determining when to inquire the power price is formulated as a Markov decision process and the corresponding elements, namely the action space, system state and reward function, are defined. Dynamic programming is then applied to obtain the optimal strategy. A simpler myopic approach is proposed by comparing the cost of communications and the penalty incurred by using the old value of power price. Numerical resul...

  9. 1284 IEEE TRANSACTIONS ON POWER DELIVERY, VOL. 26, NO. 2, APRIL 2011 Improving SVM-Based Nontechnical Loss Detection in Power Utility Using

    E-Print Network [OSTI]

    Ducatelle, Frederick

    classification. I. INTRODUCTION DISTRIBUTON losses in power utilities originating from electricity theft-Based Nontechnical Loss Detection in Power Utility Using the Fuzzy Inference System Jawad Nagi, Keem Siah Yap, Sieh of fraud and electricity theft in power distribution utilities. Pre- vious work was carried out by using

  10. The future of GPS-based electric power system measurements, operation and control

    SciTech Connect (OSTI)

    Rizy, D.T. [Oak Ridge National Lab., TN (United States); Wilson, R.E. [Western Area Power Administration, Golden, CO (United States); Martin, K.E.; Litzenberger, W.H. [Bonneville Power Administration, Portland, OR (United States); Hauer, J.F. [Pacific Northwest National Lab., Richland, WA (United States); Overholt, P.N. [Dept. of Energy, Washington, DC (United States); Sobajic, D.J. [Electric Power Research Inst., Palo Alto, CA (United States)

    1998-11-01T23:59:59.000Z

    Much of modern society is powered by inexpensive and reliable electricity delivered by a complex and elaborate electric power network. Electrical utilities are currently using the Global Positioning System-NAVSTAR (GPS) timekeeping to improve the network`s reliability. Currently, GPS synchronizes the clocks on dynamic recorders and aids in post-mortem analysis of network disturbances. Two major projects have demonstrated the use of GPS-synchronized power system measurements. In 1992, the Electric Power Research Institute`s (EPRI) sponsored Phase Measurements Project used a commercially available Phasor Measurements Unit (PMU) to collect GPS-synchronized measurements for analyzing power system problems. In 1995, Bonneville Power Administration (BPA) and Western Area Power Administration (WAPA) under DOE`s and EPRI`s sponsorship launched the Wide Area Measurements (WAMS) project. WAMS demonstrated GPS-synchronized measurements over a large area of their power networks and demonstrated the networking of GPS-based measurement systems in BPA and WAPA. The phasor measurement technology has also been used to conduct dynamic power system tests. During these tests, a large dynamic resistor was inserted to simulate a small power system disturbance.

  11. Analysis of silicon carbide based semiconductor power devices and their application in power factor correction

    E-Print Network [OSTI]

    Durrani, Yamin Qaisar

    2005-11-01T23:59:59.000Z

    electronic switching devices................. 22 2.4.1. SiC Schottky diode................................................................. 22 2.4.2. 4H-SiC PiN diode................................................................... 23 2.4.3. Si...C MOSFET.......................................................................... 23 2.4.4. SiC JFET................................................................................. 23 2.5. Analysis of SiC based Schottky diode...

  12. Space-Based Solar Power | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreakingMayDepartment of EnergySite ScreeningSoundChallengesSpaceSpace-Based

  13. Microprocessor-based random PWM schemes for DC-AC power conversion

    SciTech Connect (OSTI)

    Hui, S.Y.R. [Univ. of Sydney, New South Wales (Australia). Dept. of Electrical Engineering] [Univ. of Sydney, New South Wales (Australia). Dept. of Electrical Engineering; [City Univ. of Hong Kong, Kowloon (Hong Kong). Dept. of Electronic Engineering; Oppermann, I.; Sathiakumar, S. [Univ. of Sydney, New South Wales (Australia). Dept. of Electrical Engineering] [Univ. of Sydney, New South Wales (Australia). Dept. of Electrical Engineering

    1997-03-01T23:59:59.000Z

    Two classes of microprocessor-based random PWM (RPWM) real-time schemes for dc-ac power conversion are compared and evaluated. Performance of the RPWM schemes based on the mathematical and logical approaches is examined. The proposed schemes exhibit excellent harmonic content with all low and high-order harmonics suppressed and are suitable for both MOSFET and IGBT inverters.

  14. Environment-based pin-power reconstruction method for homogeneous core calculations

    SciTech Connect (OSTI)

    Leroyer, H.; Brosselard, C.; Girardi, E. [EDF R and D/SINETICS, 1 av du General de Gaulle, F92141 Claman Cedex (France)

    2012-07-01T23:59:59.000Z

    Core calculation schemes are usually based on a classical two-step approach associated with assembly and core calculations. During the first step, infinite lattice assemblies calculations relying on a fundamental mode approach are used to generate cross-sections libraries for PWRs core calculations. This fundamental mode hypothesis may be questioned when dealing with loading patterns involving several types of assemblies (UOX, MOX), burnable poisons, control rods and burn-up gradients. This paper proposes a calculation method able to take into account the heterogeneous environment of the assemblies when using homogeneous core calculations and an appropriate pin-power reconstruction. This methodology is applied to MOX assemblies, computed within an environment of UOX assemblies. The new environment-based pin-power reconstruction is then used on various clusters of 3x3 assemblies showing burn-up gradients and UOX/MOX interfaces, and compared to reference calculations performed with APOLLO-2. The results show that UOX/MOX interfaces are much better calculated with the environment-based calculation scheme when compared to the usual pin-power reconstruction method. The power peak is always better located and calculated with the environment-based pin-power reconstruction method on every cluster configuration studied. This study shows that taking into account the environment in transport calculations can significantly improve the pin-power reconstruction so far as it is consistent with the core loading pattern. (authors)

  15. A review of ash in conventional and advanced coal-based power systems

    SciTech Connect (OSTI)

    Holcombe, N.T.

    1995-12-31T23:59:59.000Z

    Process conditions are briefly described for conventional and advanced power systems. The advanced systems include both combustion and gasification processes. We discuss problems in coal-based power generation systems, including deposition, agglomeration and sintering of bed materials, and ash attack are discussed. We also discuss methods of mitigating ash problems and anticipated changes anticipated in ash use by converting from conventional to advanced systems.

  16. Distributed energy resources customer adoption modeling with combined heat and power applications

    E-Print Network [OSTI]

    Siddiqui, Afzal S.; Firestone, Ryan M.; Ghosh, Srijay; Stadler, Michael; Edwards, Jennifer L.; Marnay, Chris

    2003-01-01T23:59:59.000Z

    Alex Farrell of the Energy and Resources Group, UniversityMicrogrid Distributed Energy Resource Potential Using DER-of Distributed Energy Resources: The CERTS MicroGrid

  17. Large-scale Ocean-based or Geothermal Power Plants by Thermoelectric Effects

    E-Print Network [OSTI]

    Liu, Liping

    2012-01-01T23:59:59.000Z

    Heat resources of small temperature difference are easily accessible, free and unlimited on earth. Thermoelectric effects provide the technology for converting these heat resources directly into electricity. We present designs of electricity generators based on thermoelectric effects and using heat resources of small temperature difference, e.g., ocean water at different depths and geothermal sources, and conclude that large-scale power plants based on thermoelectric effects are feasible and economically competitive. The key observation is that the power factor of thermoelectric materials, unlike the figure of merit, can be improved by orders of magnitude upon laminating good conductors and good thermoelectric materials. The predicted large-scale power plants based on thermoelectric effects, if validated, will have a global economic and social impact for its scalability, and the renewability, free and unlimited supply of heat resources of small temperature difference on earth.

  18. An Integrated Security-constrained Model-based Dynamic Power Management Approach for Isolated Microgrid Power Systems

    E-Print Network [OSTI]

    Mashayekh, Salman

    2013-11-22T23:59:59.000Z

    Prime Mover and Control GeneratorExcitation System and Control Shaft Power Field Current Voltage Speed / Power Speed Generating Unit Controls – Unit 1 Reactive Power and Voltage Control HVDC Transmission and Associated Controls System Generation...

  19. Two-dimensional AXUV-based radiated power density diagnostics on NSTX-U

    SciTech Connect (OSTI)

    Faust, I.; Parker, R. R. [MIT - Plasma Science and Fusion Center, Cambridge, Massachusetts 02139 (United States); Delgado-Aparicio, L.; Bell, R. E.; Diallo, A.; Gerhardt, S. P.; LeBlanc, B.; Kozub, T. A. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540 (United States); Tritz, K. [The Johns Hopkins University, Baltimore, Maryland 21209 (United States); Stratton, B. C. [MIT - Plasma Science and Fusion Center, Cambridge, Massachusetts 02139 (United States); Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540 (United States)

    2014-11-15T23:59:59.000Z

    A new set of radiated-power-density diagnostics for the National Spherical Torus Experiment Upgrade (NSTX-U) tokamak have been designed to measure the two-dimensional poloidal structure of the total photon emissivity profile in order to perform power balance, impurity transport, and magnetohydrodynamic studies. Multiple AXUV-diode based pinhole cameras will be installed in the same toroidal angle at various poloidal locations. The local emissivity will be obtained from several types of tomographic reconstructions. The layout and response expected for the new radially viewing poloidal arrays will be shown for different impurity concentrations to characterize the diagnostic sensitivity. The radiated power profile inverted from the array data will also be used for estimates of power losses during transitions from various divertor configurations in NSTX-U. The effect of in-out and top/bottom asymmetries in the core radiation from high-Z impurities will be addressed.

  20. High-efficient solar power systems based on thermionic converter with small gap

    SciTech Connect (OSTI)

    Nikolaev, Y.V.; Eryomin, S.A.; Kalmykov, S.S.; Karpechenko, Y.D.; Kucherov, R.Y.; Lapochkin, N.V. [Research Institute of Scientific Industrial Association ``Lutch``, 142100, Podolsk, Moscow Region (Russian Federation)

    1996-03-01T23:59:59.000Z

    Various configurations of power systems based on thermionic converter with small interelectrode gap have been considered. The results of studies of systems energy characteristics are presented. The high efficiency and perspectivety of such systems for different applications have been shown. {copyright} {ital 1996 American Institute of Physics.}

  1. Virginia Tech Comprehensive Power-based Fuel Consumption Model: Model Development and Testing

    E-Print Network [OSTI]

    Rakha, Hesham A.

    The transportation sector consumes approximately 30% of the total energy in the United States, which is mostlyVirginia Tech Comprehensive Power-based Fuel Consumption Model: Model Development and Testing, Moran, Saerens, and Van den Bulck 2 ABSTRACT Existing fuel consumption and emission models suffer from

  2. A laboratory for research and teaching of microprocessor-based power system protection

    SciTech Connect (OSTI)

    Sachdev, M.S.; Sidhu, T.S. [Univ. of Saskatchewan, Saskatoon, Saskatchewan (Canada). Power System Research Group] [Univ. of Saskatchewan, Saskatoon, Saskatchewan (Canada). Power System Research Group

    1996-05-01T23:59:59.000Z

    This paper describes a laboratory which is used for conducting research and teaching in the area of microprocessor-based power system protection. The details of the facilities and their functions are presented. The use of the laboratory for specific research and teaching functions is outlined. Students` experiences with the use of the laboratory are also discussed.

  3. An Evaluation of Economy-based Resource Trading and Scheduling on Computational Power Grids for

    E-Print Network [OSTI]

    Buyya, Rajkumar

    1 An Evaluation of Economy-based Resource Trading and Scheduling on Computational Power Grids, Computational Economy, Resource Trading, Nimrod/G Resource Broker, Scheduling, and Parameter Sweep Applications, resource allocation or co-allocation, online control, scalability, transparency, and "economy

  4. FC/Battery Power Management for Electric Vehicle Based Interleaved dc-dc Boost Converter Topology

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    FC/Battery Power Management for Electric Vehicle Based Interleaved dc- dc Boost Converter Topology.fr Keywords Fuel cell System (FCS), Electric vehicle, Energy management, Interleaved Boost DC-DC Converter (FC for electric vehicle may not be feasible to satisfy the peak demand changes especially during accelerations

  5. Effect of Compressing the Dynamic Range of the Power Spectrum in Modulation Filtering Based Speech Enhancement

    E-Print Network [OSTI]

    .paliwal@griffith.edu.au Abstract In the modulation-filtering based speech enhancement method, noise suppression is achieved systematically different dynamic range compression functions applied to the power spectrum for speech enhancement- gibility of the enhanced speech. The quality is measured objec- tively in terms of the Perceptual

  6. Scenario-Based Fault-Tolerant Model Predictive Control for Diesel-Electric Marine Power Plant

    E-Print Network [OSTI]

    Johansen, Tor Arne

    Scenario-Based Fault-Tolerant Model Predictive Control for Diesel-Electric Marine Power Plant Email: torstein.bo@itk.ntnu.no, tor.arne.johansen@itk.ntnu.no Abstract--Diesel-electric propulsion generation control, Ma- rine safety, Optimal control. I. INTRODUCTION Diesel electric propulsion is a system

  7. A Pattern-Based Method for Safe Control Systems Exemplified within Nuclear Power

    E-Print Network [OSTI]

    Stølen, Ketil

    A Pattern-Based Method for Safe Control Systems Exemplified within Nuclear Power Production Andr´e Alexandersen Hauge1,3 and Ketil Stølen2,3 1 Department of Software Engineering, Institute for Energy Technology), on a case taken from the nuclear domain. The method is supported by a pattern language and pro- vides

  8. A Current-based Method for Short Circuit Power Calculation under Noisy Input Waveforms*

    E-Print Network [OSTI]

    Pedram, Massoud

    A Current-based Method for Short Circuit Power Calculation under Noisy Input Waveforms* Hanif circuit energy dissipation of logic cells. The short circuit current is highly dependent on the input waveforms are then used to calculate the short circuit current, and hence, short circuit energy dissipation

  9. Improved Thermoelectric Power Factor in Metal-Based Superlattices Daryoosh Vashaee and Ali Shakouri*

    E-Print Network [OSTI]

    Improved Thermoelectric Power Factor in Metal-Based Superlattices Daryoosh Vashaee and Ali Shakouri and thermoelectric transport perpendicular to heterostructure superlattices. This nonlinear transport regime above with tall barriers can achieve a large effective thermoelectric figure of merit (ZT > 5 at room temperature

  10. Distributed Internet-based Load Altering Attacks against Smart Power Grids

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    technology in advanced demand side management and given the growth in power consumption in the computation by compromising direct load control command signals, demand side management price signals, or cloud computation distribution system. Keywords: Smart grid security, Internet-based load altering attacks, demand side

  11. A Flow Level Perspective on Base Station Power Allocation in Green Networks

    E-Print Network [OSTI]

    Boyer, Edmond

    the energy-efficiency of base stations operating in the downlink. The energy-efficiency refers to the amount nature of users (referred to as the global energy-efficiency). We emphasize our numerical results that study the influence of the radio conditions, transmit power and the user traffic on the energy-efficiency

  12. IEEE TRANSACTIONS ON POWER SYSTEMS 1 Web-based Security Cost Analysis in Electricity

    E-Print Network [OSTI]

    Cañizares, Claudio A.

    IEEE TRANSACTIONS ON POWER SYSTEMS 1 Web-based Security Cost Analysis in Electricity Markets Hong, and describes its implementation using a 3-tier client/server architecture and up-to-date web technologies to certain system parameters. The web implementation allows easy and effective access by all market

  13. Journal of Power Sources 128 (2004) 5460 Microfluidic fuel cell based on laminar flow

    E-Print Network [OSTI]

    Kenis, Paul J. A.

    2004-01-01T23:59:59.000Z

    Journal of Power Sources 128 (2004) 54­60 Microfluidic fuel cell based on laminar flow Eric R a novel microfluidic fuel cell concept that utilizes the occurrence of multi-stream laminar flow turbulent mixing. Preliminary results indicate that this novel fuel cell concept may lead to the development

  14. LOP: A Novel SRAM-based Architecture for LOw Power Packet Classification

    E-Print Network [OSTI]

    New South Wales, University of

    LOP: A Novel SRAM-based Architecture for LOw Power Packet Classification Xin He, Jorgen Peddersen, Sri Parameswaran School of Computer Science and Engineering, National ICT Australia The University of New South Wales, Sydney, NSW 2052, Australia {xinhe,jorgenp,sridevan}@cse.unsw.edu.au UNSW-CSE-TR-0907

  15. Optimization of a Steady-State Tokamak-Based Power Plant

    E-Print Network [OSTI]

    Optimization of a Steady-State Tokamak-Based Power Plant Farrokh Najmabadi University of California, San Diego, La Jolla, CA IEA Workshop 59 "Shape and aspect ratio optimization for high , steady between a physics optimization and an integrated systems optimization Identify key impact of physics

  16. The development of low cost LiFePO4-based high power lithium-ion batteries

    E-Print Network [OSTI]

    Shim, Joongpyo; Sierra, Azucena; Striebel, Kathryn A.

    2003-01-01T23:59:59.000Z

    4 , natural graphite, lithium-ion battery, diagnosticsand efficiency of pouch lithium-ion cells for constant C/24 -BASED HIGH POWER LITHIUM-ION BATTERIES Joongpyo Shim,

  17. The development of low cost LiFePO4-based high power lithium-ion batteries

    E-Print Network [OSTI]

    Shim, Joongpyo; Sierra, Azucena; Striebel, Kathryn A.

    2003-01-01T23:59:59.000Z

    study of rechargeable lithium batteries for application inin consumer-size lithium batteries, such as the synthetic4 -BASED HIGH POWER LITHIUM-ION BATTERIES Joongpyo Shim,

  18. Validation of an Agent-based Model of Deregulated Electric Power Markets Charles M. Macal and Michael J. North

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    Validation of an Agent-based Model of Deregulated Electric Power Markets Charles M. Macal model of the electric power market designed to investigate market restructuring and deregulation, deregulated electric power markets Acknowledgments: The authors would like to acknowledge the other members

  19. Abstract -This paper presents a supervised learning based power management framework for a multi-processor system, where a

    E-Print Network [OSTI]

    Pedram, Massoud

    1 Abstract - This paper presents a supervised learning based power management framework for a multi-processor system, where a power manager (PM) learns to predict the system performance state from some readily this predicted state to look up the optimal power management action (e.g., voltage-frequency setting) from

  20. Data base on batteries, power-conditioning equipment, and photovoltaic arrays. Final report

    SciTech Connect (OSTI)

    Podder, A; Kapner, M; Morse, T

    1981-02-01T23:59:59.000Z

    The objective of this study was to compile an up-to-date comprehensive data base for research, design, and development of photovoltaic systems, primarily in the areas of applications and battery technology, and secondarily in the area of power conditioning and photovoltaic array technology. This volume contains the data base used to develop the end-use scenarios and identify the R and D needed for batteries to be used in photovoltaic power systems. In addition to its specific application to the present study, this data base is intended to provide state-of-the-art information to manufacturers of the various components of photovoltaic power systems, system designers, and researchers in this field. An extensive literature search was conducted to obtain technical data on batteries, power conditioners, and photovoltaic arrays. The data obtained from published technical literature and direct communication with manufacturers and developers are compiled. Principles of operation, types of systems, performance characteristics, test data, and cost data are included for each of the components. (WHK)

  1. Fuel Cells: Thermodynamic Engine to a Sustainable Energy Future Richard T. Carlin

    E-Print Network [OSTI]

    Levi, Anthony F. J.

    penetration; enhances grid and micro-grid power management; provides efficient electrical power generation from biomass; provides easily scalable micro-grid energy storage; and enables long sustainable, reliable electrical grids and micro-grids. Integration of fuel cell systems with renewable

  2. Circuit for reducing power consumption in battery operated microprocessor based systems

    SciTech Connect (OSTI)

    Boyd, J.C.

    1980-05-13T23:59:59.000Z

    In a microprocessor based system, wherein at least one microprocessor is battery powered, a power strobe circuit includes an analog switch for connecting the battery to the microprocessor only during programmed task performance. Upon completion of task performance, the microprocessor generates signals which trigger the analog switch to open, thereby deenergizing the microprocessor and to enable an external timer. After a predetermined period of time, which may be fixed in the timer or programmed, the timer causes the switch to reclose, thereby energizing the microprocessor for performance of another programmed task.

  3. Sulfur Based Thermochemical Heat Storage for Baseload Concentrated Solar Power Generation

    SciTech Connect (OSTI)

    wong, bunsen

    2014-11-20T23:59:59.000Z

    This project investigates the engineering and economic feasibility of supplying baseload power using a concentrating solar power (CSP) plant integrated with sulfur based thermochemical heat storage. The technology stores high temperature solar heat in the chemical bonds of elemental sulfur. Energy is recovered as high temperature heat upon sulfur combustion. Extensive developmental and design work associated with sulfur dioxide (SO2) disproportionation and sulfuric acid (H2SO4) decomposition chemical reactions used in this technology had been carried out in the two completed phases of this project. The feasibility and economics of the proposed concept was demonstrated and determined.

  4. Sustainable Forward Operating Base Nuclear Power Evaluation (Relationship Mapping System) Users’ Manual

    SciTech Connect (OSTI)

    Not Listed

    2012-01-01T23:59:59.000Z

    The Sustainable Forward Operating Base (FOB) Nuclear Power Evaluation was developed by the Idaho National Laboratory Systems Engineering Department to support the Defense Advanced Research Projects Agency (DARPA) in assessing and demonstrating the viability of deploying small-scale reactors in support of military operations in theatre. This document provides a brief explanation of how to access and use the Sustainable FOB Nuclear Power Evaluation utility to view assessment results as input into developing and integrating the program elements needed to create a successful demonstration.

  5. 3 2 9002000 2 4 241

    E-Print Network [OSTI]

    Fujimoto, Hiroshi

    of Energy Storage in a Micro Grid considering Operation Shifts without Interruption 12 10 calculations 24 11:36 Development of Ubiquitous Power Grid 25 11:42 Camera based 3D Reconstruction type reactor OHLIF 2 9:06 Human-friendly Motion Control Based on Electric Power Steering

  6. Ultra-low power, Zeno effect based optical modulation in a degenerate V-system with a

    E-Print Network [OSTI]

    Shahriar, Selim

    Ultra-low power, Zeno effect based optical modulation in a degenerate V-system with a tapered nano@northwestern.edu Abstract: We demonstrate an ultra-low light level optical modulator using a tapered nano fiber embedded. For a control power of 40 nW and a signal power of 100 pW, we observe near 100% modulation. The ultra-low power

  7. A bimodal power and propulsion system based on cermet fuel and heat pipe energy transport

    SciTech Connect (OSTI)

    Polansky, G.F. [Sandia National Labs., Albuquerque, NM (United States); Gunther, N.A. [Gunther (Norman A.), San Jose, CA (United States); Rochow, R.F. [Novatech, Lynchburg, VA (United States); Bixler, C.H. [Bixler (Charles H.), Mannford, OK (United States)

    1995-05-01T23:59:59.000Z

    Bimodal space reactor systems provide both thermal propulsion for the spacecraft orbital transfer and electrical power to the spacecraft bus once it is on station. These systems have the potential to increase both the available payload in high energy orbits and the available power to that payload. These increased mass and power capabilities can be used to either reduce mission cost by permitting the use of smaller launch vehicles or to provide increased mission performance from the current launch vehicle. A major barrier to the deployment of these bimodal systems has been the cost associated with their development. This paper describes a bimodal reactor system with performance potential to permit more than 70% of the instrumented payload of the Titan IV/Centaur to be launched from the Atlas IIAS. The development cost is minimized by basing the design on existing component technologies.

  8. Space nuclear-power reactor design based on combined neutronic and thermal-fluid analyses

    SciTech Connect (OSTI)

    Koenig, D.R.; Gido, R.G.; Brandon, D.I.

    1985-01-01T23:59:59.000Z

    The design and performance analysis of a space nuclear-power system requires sophisticated analytical capabilities such as those developed during the nuclear rocket propulsion (Rover) program. In particular, optimizing the size of a space nuclear reactor for a given power level requires satisfying the conflicting requirements of nuclear criticality and heat removal. The optimization involves the determination of the coolant void (volume) fraction for which the reactor diameter is a minimum and temperature and structural limits are satisfied. A minimum exists because the critical diameter increases with increasing void fraction, whereas the reactor diameter needed to remove a specified power decreases with void fraction. The purpose of this presentation is to describe and demonstrate our analytical capability for the determination of minimum reactor size. The analysis is based on combining neutronic criticality calculations with OPTION-code thermal-fluid calculations.

  9. Stresa, Italy, 26-28 April 2006 A SILICON-BASED MICRO GAS TURBINE ENGINE FOR POWER GENERATION

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Stresa, Italy, 26-28 April 2006 A SILICON-BASED MICRO GAS TURBINE ENGINE FOR POWER GENERATION X. C. Our research aims to develop a micro power generation systems based on micro gas turbine engine and a piezoelectric converter, as illustrated in Fig. 1 [6]. The micro gas turbine engine is composed of a centrifugal

  10. Improved thermoelectric power output from multilayered polyethylenimine doped carbon nanotube based organic composites

    SciTech Connect (OSTI)

    Hewitt, Corey A.; Montgomery, David S.; Barbalace, Ryan L.; Carlson, Rowland D.; Carroll, David L., E-mail: carroldl@wfu.edu [Center for Nanotechnology and Molecular Materials, Wake Forest University, 501 Deacon Blvd., Winston Salem, North Carolina 27105 (United States)

    2014-05-14T23:59:59.000Z

    By appropriately selecting the carbon nanotube type and n-type dopant for the conduction layers in a multilayered carbon nanotube composite, the total device thermoelectric power output can be increased significantly. The particular materials chosen in this study were raw single walled carbon nanotubes for the p-type layers and polyethylenimine doped single walled carbon nanotubes for the n-type layers. The combination of these two conduction layers leads to a single thermocouple Seebeck coefficient of 96 ± 4??VK{sup ?1}, which is 6.3 times higher than that previously reported. This improved Seebeck coefficient leads to a total power output of 14.7 nW per thermocouple at the maximum temperature difference of 50?K, which is 44 times the power output per thermocouple for the previously reported results. Ultimately, these thermoelectric power output improvements help to increase the potential use of these lightweight, flexible, and durable organic multilayered carbon nanotube based thermoelectric modules in low powered electronics applications, where waste heat is available.

  11. pCloud: A Cloud-based Power Market Simulation Environment

    SciTech Connect (OSTI)

    Rudkevich, Aleksandr; Goldis, Evgeniy

    2012-12-02T23:59:59.000Z

    This research conducted by the Newton Energy Group, LLC (NEG) is dedicated to the development of pCloud: a Cloud-based Power Market Simulation Environment. pCloud is offering power industry stakeholders the capability to model electricity markets and is organized around the Software as a Service (SaaS) concept -- a software application delivery model in which software is centrally hosted and provided to many users via the internet. During the Phase I of this project NEG developed a prototype design for pCloud as a SaaS-based commercial service offering, system architecture supporting that design, ensured feasibility of key architecture's elements, formed technological partnerships and negotiated commercial agreements with partners, conducted market research and other related activities and secured funding for continue development of pCloud between the end of Phase I and beginning of Phase II, if awarded. Based on the results of Phase I activities, NEG has established that the development of a cloud-based power market simulation environment within the Windows Azure platform is technologically feasible, can be accomplished within the budget and timeframe available through the Phase II SBIR award with additional external funding. NEG believes that pCloud has the potential to become a game-changing technology for the modeling and analysis of electricity markets. This potential is due to the following critical advantages of pCloud over its competition: - Standardized access to advanced and proven power market simulators offered by third parties. - Automated parallelization of simulations and dynamic provisioning of computing resources on the cloud. This combination of automation and scalability dramatically reduces turn-around time while offering the capability to increase the number of analyzed scenarios by a factor of 10, 100 or even 1000. - Access to ready-to-use data and to cloud-based resources leading to a reduction in software, hardware, and IT costs. - Competitive pricing structure, which will make high-volume usage of simulation services affordable. - Availability and affordability of high quality power simulators, which presently only large corporate clients can afford, will level the playing field in developing regional energy policies, determining prudent cost recovery mechanisms and assuring just and reasonable rates to consumers. - Users that presently do not have the resources to internally maintain modeling capabilities will now be able to run simulations. This will invite more players into the industry, ultimately leading to more transparent and liquid power markets.

  12. Combined Base Station Association and Power Control in Multi-channel Cellular Networks

    E-Print Network [OSTI]

    Singh, Chandramani; Sundaresan, Rajesh

    2011-01-01T23:59:59.000Z

    A combined base station association and power control problem is studied for the uplink of multichannel multicell cellular networks, in which each channel is used by exactly one cell (i.e., base station). A distributed association and power update algorithm is proposed and shown to converge to a Nash equilibrium of a noncooperative game. We consider network models with discrete mobiles (yielding an atomic congestion game), as well as a continuum of mobiles (yielding a population game). We find that the equilibria need not be Pareto efficient, nor need they be system optimal. To address the lack of system optimality, we propose pricing mechanisms. It is shown that these mechanisms can be implemented in a distributed fashion.

  13. Commissioning of the First Klystron-Based X-Band Power Source at CERN

    E-Print Network [OSTI]

    Kovermann, J; Curt, S; Doebert, S; Naon, M; McMonagle, G; Paju, E; Rey, S; Riddone, G; Schirm, K; Syratchev, I; Timeo, L; Wuensch, W; Hamdi, A; Peauger, FF; Eichner, J; Haase, A; Sprehn, D

    2012-01-01T23:59:59.000Z

    A new klystron based X-band rf power source operating at 11.994 GHz has been installed and started to be commissioned at CERN in collaboration with CEA Saclay and SLAC for CLIC accelerating structure tests. The system comprises a solid state high voltage modulator, an XL5 klystron developed by SLAC, a cavity based SLED type pulse compressor, the necessary low level rf system including rf diagnostics and interlocks and the surrounding vacuum, cooling and controls infrastructure. The system is designed to produce up to 50 MW rf pulses of 1500 ns pulse width and 50 Hz repetition rate. After pulse compression, up to 100 MW of rf power at 250 ns pulse width will be available in the structure test bunker. This paper describes in more detail this setup and the process of commissioning which is necessary to arrive at the design performance.

  14. Linearity Improvement ofHBT-based Doherty Power Amplifiers Based on a Simple Analytical Model

    E-Print Network [OSTI]

    Asbeck, Peter M.

    model is based on linear and nonlinear components extracted from a VBIC model for Skyworks InGaP values were extracted from a device model for a Skyworks advanced InGaP/GaAs HBT, using ADS in harmonic

  15. Analysis of Complexity and Power Consumption in DSP-Based Optical Modulation Formats

    E-Print Network [OSTI]

    Wei, J. L.; Cheng, Q.; Penty, R. V.; White, I. H.

    2014-07-17T23:59:59.000Z

    sector as a result of concerns about global warming. Thus energy-efficiency is also an important criterion for technology evolution [5]. Ethernet has been the dominant technology for short reach optical interconnects [6]. In March 2013, the IEEE... Analysis of Complexity and Power Consumption in DSP-Based Optical Modulation Formats J. L. Wei, Q. Cheng, R. V. Penty, and I. H. White Centre for Photonic Systems, Electrical Engineering Division, Department of Engineering, University...

  16. Power Smoothing and Limitation Control of a PMSG-Based Marine Current Turbine under Swell Waves

    E-Print Network [OSTI]

    Boyer, Edmond

    Power Smoothing and Limitation Control of a PMSG-Based Marine Current Turbine under Swell Waves la puissance maximale (MPPT) nécessiterait d'accélérer ou de décélérer fréquemment la turbine à par une turbine marine associée à un générateur synchrone à aimants permanents (GSAP). Un algorithme

  17. Application of Microprocessor-Based Equipment in Nuclear Power Plants - Technical Basis for a Qualification Methodology

    SciTech Connect (OSTI)

    Korsah, K.

    2001-08-24T23:59:59.000Z

    This document (1) summarizes the most significant findings of the ''Qualification of Advanced Instrumentation and Control (I&C) Systems'' program initiated by the Nuclear Regulatory Commission (NRC); (2) documents a comparative analysis of U.S. and European qualification standards; and (3) provides recommendations for enhancing regulatory guidance for environmental qualification of microprocessor-based safety-related systems. Safety-related I&C system upgrades of present-day nuclear power plants, as well as I&C systems of Advanced Light-Water Reactors (ALWRs), are expected to make increasing use of microprocessor-based technology. The Nuclear Regulatory Commission (NRC) recognized that the use of such technology may pose environmental qualification challenges different from current, analog-based I&C systems. Hence, it initiated the ''Qualification of Advanced Instrumentation and Control Systems'' program. The objectives of this confirmatory research project are to (1) identify any unique environmental-stress-related failure modes posed by digital technologies and their potential impact on the safety systems and (2) develop the technical basis for regulatory guidance using these findings. Previous findings from this study have been documented in several technical reports. This final report in the series documents a comparative analysis of two environmental qualification standards--Institute of Electrical and Electronics Engineers (IEEE) Std 323-1983 and International Electrotechnical Commission (IEC) 60780 (1998)--and provides recommendations for environmental qualification of microprocessor-based systems based on this analysis as well as on the findings documented in the previous reports. The two standards were chosen for this analysis because IEEE 323 is the standard used in the U.S. for the qualification of safety-related equipment in nuclear power plants, and IEC 60780 is its European counterpart. In addition, the IEC document was published in 1998, and should reflect any new qualification concerns, from the European perspective, with regard to the use of microprocessor-based safety systems in power plants.

  18. A Knowledge-Based Approach for Power-Plant Availability Analysis

    E-Print Network [OSTI]

    Reddy, A. Chandra Shekar

    1988-01-01T23:59:59.000Z

    , this is a very powerful approach. When common- mode failures are to be included, this approach is not valid and the transition rate matrix approach needs to be used. C. GO Block Logic System The GO Availability Analysis Methodology was developed by EPRI... in Fig. 14. is based upon one of the designs developed by EPRI to aid in the evaluation of the economic benefits of potential improvements in advanced gas turbine reliaibility. The failure snd repair rates are based on previous historic data. Both...

  19. A Wavelet-Based Variability Model (WVM) for Solar PV Power Plants

    E-Print Network [OSTI]

    Lave, Matthew; Kleissl, Jan; Stein, Joshua S

    2013-01-01T23:59:59.000Z

    Model (WVM) for Solar PV Power Plants Matthew Lave, Jansolar photovoltaic (PV) power plant output given a singleproduce a simulated power plant output. The WVM is validated

  20. Atmospheric pressure plasma jet with high-voltage power supply based on piezoelectric transformer

    SciTech Connect (OSTI)

    Babij, Micha?; Kowalski, Zbigniew W., E-mail: zbigniew.w.kowalski@pwr.wroc.pl; Nitsch, Karol; Gotszalk, Teodor [Wroc?aw University of Technology, Wybrze?e Wyspia?skiego 27, 50-370 Wroc?aw (Poland)] [Wroc?aw University of Technology, Wybrze?e Wyspia?skiego 27, 50-370 Wroc?aw (Poland); Silberring, Jerzy [AGH University of Science and Technology, Al. A. Mickiewicza 30, 30-059 Kraków (Poland)] [AGH University of Science and Technology, Al. A. Mickiewicza 30, 30-059 Kraków (Poland)

    2014-05-15T23:59:59.000Z

    The dielectric barrier discharge plasma jet, an example of the nonthermal atmospheric pressure plasma jet (APPJ), generates low-temperature plasmas that are suitable for the atomization of volatile species and can also be served as an ionization source for ambient mass and ion mobility spectrometry. A new design of APPJ for mass spectrometry has been built in our group. In these plasma sources magnetic transformers (MTs) and inductors are typically used in power supplies but they present several drawbacks that are even more evident when dealing with high-voltage normally used in APPJs. To overcome these disadvantages, high frequency generators with the absence of MT are proposed in the literature. However, in the case of miniaturized APPJs these conventional power converters, built of ferromagnetic cores and inductors or by means of LC resonant tank circuits, are not so useful as piezoelectric transformer (PT) based power converters due to bulky components and small efficiency. We made and examined a novel atmospheric pressure plasma jet with PT supplier served as ionization source for ambient mass spectrometry, and especially mobile spectrometry where miniaturization, integration of components, and clean plasma are required. The objective of this paper is to describe the concept, design, and implementation of this miniaturized piezoelectric transformer-based atmospheric pressure plasma jet.

  1. Power scaling analysis of fiber lasers and amplifiers based on non-silica materials

    SciTech Connect (OSTI)

    Dawson, J W; Messerly, M J; Heebner, J E; Pax, P H; Sridharan, A K; Bullington, A L; Beach, R J; Siders, C W; Barty, C P; Dubinskii, M

    2010-03-30T23:59:59.000Z

    A developed formalism for analyzing the power scaling of diffraction limited fiber lasers and amplifiers is applied to a wider range of materials. Limits considered include thermal rupture, thermal lensing, melting of the core, stimulated Raman scattering, stimulated Brillouin scattering, optical damage, bend induced limits on core diameter and limits to coupling of pump diode light into the fiber. For conventional fiber lasers based upon silica, the single aperture, diffraction limited power limit was found to be 36.6kW. This is a hard upper limit that results from an interaction of the stimulated Raman scattering with thermal lensing. This result is dependent only upon physical constants of the material and is independent of the core diameter or fiber length. Other materials will have different results both in terms of ultimate power out and which of the many limits is the determining factor in the results. Materials considered include silica doped with Tm and Er, YAG and YAG based ceramics and Yb doped phosphate glass. Pros and cons of the various materials and their current state of development will be assessed. In particular the impact of excess background loss on laser efficiency is discussed.

  2. Agent-Based Modleing of Power Plants Placement to Evaluate the Clean Energy Standard Goal

    SciTech Connect (OSTI)

    Omitaomu, Olufemi A [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    There is a political push for utilities to supply a specified share of their electricity sales from clean energy resources under the clean energy standard (CES). The goal is to achieve 80% clean energy by 2035. However, there are uncertainties about the ability of the utility industry to ramp up quickly even with the incentives that will be provided. Water availability from the streams is one of the major factors. The contiguous United States is divided into eighteen water regions, and multiple states share water from a single water region. Consequently, water usage decisions made in one state (located upstream of a water region that crosses multiple states) will greatly impact what is available downstream in another state. In this paper, an agent-based modeling approach is proposed to evaluate the clean energy standard goal for water-dependent energy resources. Specifically, using a water region rather than a state boundary as a bounding envelope for the modeling and starting at the headwaters, virtual power plants are placed based on the conditions that there is: (i) suitable land to site a particular power plant, (ii) enough water that meet regulatory guidelines within 20 miles of the suitable land, and (iii) a 20-mile buffer zone from an existing or a virtual power plant. The results obtained are discussed in the context of the proposed clean energy standard goal for states that overlap with one water region.

  3. A Wavelet-Based Variability Model (WVM) for Solar PV Power Plants

    E-Print Network [OSTI]

    Lave, Matthew; Kleissl, Jan; Stein, Joshua S

    2013-01-01T23:59:59.000Z

    simulating solar photovoltaic (PV) power plant output givenfor simulating the power output of a solar photovoltaic (PV)

  4. Market power analysis in the EEX electricity market : an agent-based simulation approach.

    SciTech Connect (OSTI)

    Wang, J.; Botterud, A.; Conzelmann, G.; Koritarov, V.; Decision and Information Sciences

    2008-01-01T23:59:59.000Z

    In this paper, an agent-based modeling and simulation (ABMS) approach is used to model the German wholesale electricity market. The spot market prices in the European Energy Exchange (EEX) are studied as the wholesale market prices. Each participant in the market is modeled as an individual rationality-bounded agent whose objective is to maximize its own profit. By simulating the market clearing process, the interaction among agents is captured. The market clearing price formed by agentspsila production cost bidding is regarded as the reference marginal cost. The gap between the marginal cost and the real market price is measured as an indicator of possible market power exertion. Various bidding strategies such as physical withholding and economic withholding can be simulated to represent strategic bidding behaviors of the market participants. The preliminary simulation results show that some generation companies (GenCos) are in the position of exerting market power by strategic bidding.

  5. Radiation power and linewidth of a semifluxon-based Josephson oscillator

    SciTech Connect (OSTI)

    Paramonov, M.; Fominsky, M. Yu.; Koshelets, V. P. [Kotel'nikov Institute of Radioengineering and Electronics RAS, Mokhovaya 11, 125009 Moscow (Russian Federation); Neumeier, B.; Koelle, D.; Kleiner, R.; Goldobin, E. [Physikalisches Institut and Center for Collective Quantum Phenomena in LISA, Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen (Germany)

    2014-02-10T23:59:59.000Z

    We demonstrate a high-frequency generator operating at ?200?GHz based on flipping a semifluxon in a Josephson junction of moderate normalized length. The semifluxon spontaneously appears at the ? discontinuity of the Josephson phase artificially created by means of two tiny current injectors. The radiation is detected by an on-chip detector (tunnel junction). The estimated radiation power (at the detector) is ?8?nW and should be compared with the dc power of ?100?nW consumed by the generator. The measured radiation linewidth, as low as 1.1?MHz, is typical for geometrical (Fiske) resonances, although we tried to suppress such resonances by placing well-matched microwave transformers at its both ends. Making use of a phase-locking feedback loop, we are able to reduce the radiation linewidth to less than 1?Hz measured relative to the reference oscillator and defined just by the resolution of our measurement setup.

  6. A High Performance Computing Platform for Performing High-Volume Studies With Windows-based Power Grid Tools

    SciTech Connect (OSTI)

    Chen, Yousu; Huang, Zhenyu

    2014-08-31T23:59:59.000Z

    Serial Windows-based programs are widely used in power utilities. For applications that require high volume simulations, the single CPU runtime can be on the order of days or weeks. The lengthy runtime, along with the availability of low cost hardware, is leading utilities to seriously consider High Performance Computing (HPC) techniques. However, the vast majority of the HPC computers are still Linux-based and many HPC applications have been custom developed external to the core simulation engine without consideration for ease of use. This has created a technical gap for applying HPC-based tools to today’s power grid studies. To fill this gap and accelerate the acceptance and adoption of HPC for power grid applications, this paper presents a prototype of generic HPC platform for running Windows-based power grid programs on Linux-based HPC environment. The preliminary results show that the runtime can be reduced from weeks to hours to improve work efficiency.

  7. PR-EDB: Power Reactor Embrittlement Data Base, Version 2. Revision 2, Program description

    SciTech Connect (OSTI)

    Stallmann, F.W.; Wang, J.A.; Kam, F.B.K.; Taylor, B.J. [Oak Ridge National Lab., TN (United States)] [Oak Ridge National Lab., TN (United States)

    1994-01-01T23:59:59.000Z

    Investigations of regulatory issues such as vessel integrity over plant life, vessel failure, and sufficiency of current codes Standard Review Plans (SRP`s) and Guides for license renewal can be greatly expedited by the use of a well-designed computerized data base. Also, such a data base is essential for the validation of embrittlement prediction models by researchers. The Power Reactor Embrittlement Data Base (PR-EDB) is such a comprehensive collection of data for US commercial nuclear reactors. The current version of the PR-EDB contains the Charpy test data that were irradiated in 252 capsules of 96 reactors and consists of 207 data points for heat-affected-zone (HAZ) materials (98 different HAZ), 227 data points for weld materials (105 different welds), 524 data points for base materials (136 different base materials), including 297 plate data points (85 different plates), 119 forging data points (31) different forging), and 108 correlation monitor materials data points (3 different plates). The data files are given in dBASE format and can be accessed with any computer using the DOS operating system. ``User-friendly`` utility programs are used to retrieve and select specific data, manipulate data, display data to the screen or printer, and to fit and plot Charpy impact data. The results of several studies investigated are presented in Appendix D.

  8. Abstract--This paper describes a web-based electric power market simulation tool called POWERWEB. It can be used as an

    E-Print Network [OSTI]

    1 Abstract--This paper describes a web-based electric power market simulation tool called POWERWEB structure with the operational and reliability aspects of the underlying power system. Index Terms--Power system economics, power system simulation, software tools. I. INTRODUCTION ODAY's ever evolving power

  9. An Agent-Based Test Bed for the Integrated Study of Retail and Wholesale Power System Operations

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    An Agent-Based Test Bed for the Integrated Study of Retail and Wholesale Power System Operations D study of retail and wholesale power markets operating over transmission and distribution networks with smart-grid functionality. The test bed will seam together two existing test beds, the AMES Wholesale

  10. Abstract--This paper proposes an optimization based method of planning reactive power control for electric transmission

    E-Print Network [OSTI]

    Kumar, Ratnesh

    1 Abstract--This paper proposes an optimization based method of planning reactive power control for electric transmission systems to endow them with the capability of being reconfigured to a secure planning, reactive power control, reconfiguration, voltage stability. I. INTRODUCTION PPROPRIATE long

  11. Modelling downstream change in river flood power: a novel approach based on the UK Flood Estimation Handbook

    E-Print Network [OSTI]

    Birmingham, University of

    Modelling downstream change in river flood power: a novel approach based on the UK Flood Estimation" (McEwen, 1994: 359). Lawler (1992) recognised that little was known about the downstream change. It is suggested that downstream change in discharge is best represented as a power function in terms of channel

  12. A fission matrix based validation protocol for computed power distributions in the advanced test reactor

    SciTech Connect (OSTI)

    Nielsen, J. W. [Idaho National Laboratory, MS 3840, PO Box 1625, Idaho Falls, ID 83415 (United States); Nigg, D. W. [Idaho National Laboratory, MS 3860, PO Box 1625, Idaho Falls, ID 83415 (United States); LaPorta, A. W. [Idaho National Laboratory, MS 7136, PO Box 1625, Idaho Falls, ID 83415 (United States)

    2013-07-01T23:59:59.000Z

    The Idaho National Laboratory (INL) has been engaged in a significant multi year effort to modernize the computational reactor physics tools and validation procedures used to support operations of the Advanced Test Reactor (ATR) and its companion critical facility (ATRC). Several new protocols for validation of computed neutron flux distributions and spectra as well as for validation of computed fission power distributions, based on new experiments and well-recognized least-squares statistical analysis techniques, have been under development. In the case of power distributions, estimates of the a priori ATR-specific fuel element-to-element fission power correlation and covariance matrices are required for validation analysis. A practical method for generating these matrices using the element-to-element fission matrix is presented, along with a high-order scheme for estimating the underlying fission matrix itself. The proposed methodology is illustrated using the MCNP5 neutron transport code for the required neutronics calculations. The general approach is readily adaptable for implementation using any multidimensional stochastic or deterministic transport code that offers the required level of spatial, angular, and energy resolution in the computed solution for the neutron flux and fission source. (authors)

  13. An Efficient Hybrid Power Control Algorithm for Capacity Improvement of CDMA-based Fixed Wireless Applications

    E-Print Network [OSTI]

    Zeeshan, Muhammad; Malik, Muhammad Yasir

    2011-01-01T23:59:59.000Z

    In Fixed Wireless Applications (FWA), the Code Division Multiple Access (CDMA) is the most promising candidate for wideband data access. The reason is the soft limit on the number of active mobile devices. Many Fixed Wireless Applications impose an upper bound on the BER performance which restricts the increase in number of mobile users. The number of active mobile users or Capacity is further reduced in Multipath Fading Environment (MFE). This paper presents an effective method of improving the capacity of CDMA based Fixed Wireless Networks by using a hybrid power control algorithm. The proposed scheme improves the capacity two times as compared to the conventional CDMA based networks. Simulation results have been presented to demonstrate the effectiveness of the proposed scheme.

  14. A Silicon-Based Micro Gas Turbine Engine for Power Generation

    E-Print Network [OSTI]

    Shan, X -C; Maeda, R; Sun, Y F; Wu, M; Hua, J S

    2007-01-01T23:59:59.000Z

    This paper reports on our research in developing a micro power generation system based on gas turbine engine and piezoelectric converter. The micro gas turbine engine consists of a micro combustor, a turbine and a centrifugal compressor. Comprehensive simulation has been implemented to optimal the component design. We have successfully demonstrated a silicon-based micro combustor, which consists of seven layers of silicon structures. A hairpin-shaped design is applied to the fuel/air recirculation channel. The micro combustor can sustain a stable combustion with an exit temperature as high as 1600 K. We have also successfully developed a micro turbine device, which is equipped with enhanced micro air-bearings and driven by compressed air. A rotation speed of 15,000 rpm has been demonstrated during lab test. In this paper, we will introduce our research results major in the development of micro combustor and micro turbine test device.

  15. Power Fluctuation Minimization During Behavioral Synthesis using ILP-Based Datapath Scheduling

    E-Print Network [OSTI]

    Mohanty, Saraju P.

    , FL 33620 smohanty,ranganat,chappidi¡ @csee.usf.edu Abstract-- We model the power fluctuation power, energy altogether. II. POWER FLUCTUATION MODELING Let ¨©¨ !¨" be a set of # observations from 9 7 E S , VXWYC the total power consumption in control step F , Va`8C peak power consumption

  16. CLIPPER: Counter-based Low Impact Processor Power Estimation at Run-time

    E-Print Network [OSTI]

    New South Wales, University of

    -time power/energy data has been presented. Current measurement systems draw too much power to be used is dif- ficult as measurement systems for power and energy usage draw too much power themselves, making the knowledge of processor power/energy consumption at run- time. So far, no efficient method to provide run

  17. Biogeography-Based Optimization and the Solution of the Power Flow Problem

    E-Print Network [OSTI]

    Simon, Dan

    engineer Jules Carpentier [7]. A power utility may own power generating plants fueled by coal, natural gas. It is important to adjust the power output levels among the various generating plants in the system at any given, the Law of Conservation of Energy requires that the power generated by the plants must equal the power

  18. Adapting a GIS-Based Multicriteria Decision Analysis Approach for Evaluating New Power Generating Sites

    SciTech Connect (OSTI)

    Omitaomu, Olufemi A [ORNL; Blevins, Brandon R [ORNL; Jochem, Warren C [ORNL; Mays, Gary T [ORNL; Belles, Randy [ORNL; Hadley, Stanton W [ORNL; Harrison, Thomas J [ORNL; Bhaduri, Budhendra L [ORNL; Neish, Bradley S [ORNL; Rose, Amy N [ORNL

    2012-01-01T23:59:59.000Z

    There is a growing need to site new power generating plants that use cleaner energy sources due to increased regulations on air and water pollution and a sociopolitical desire to develop more clean energy sources. To assist utility and energy companies as well as policy-makers in evaluating potential areas for siting new plants in the contiguous United States, a geographic information system (GIS)-based multicriteria decision analysis approach is presented in this paper. The presented approach has led to the development of the Oak Ridge Siting Analysis for power Generation Expansion (OR-SAGE) tool. The tool takes inputs such as population growth, water availability, environmental indicators, and tectonic and geological hazards to provide an in-depth analysis for siting options. To the utility and energy companies, the tool can quickly and effectively provide feedback on land suitability based on technology specific inputs. However, the tool does not replace the required detailed evaluation of candidate sites. To the policy-makers, the tool provides the ability to analyze the impacts of future energy technology while balancing competing resource use.

  19. Utility-Based Power Control for a Two-Cell CDMA Data Network

    E-Print Network [OSTI]

    Zhou, Chi; Honig, Michael L.; Jordan, Scott

    2005-01-01T23:59:59.000Z

    and N. B. Mandayam, “Power control for wireless data,” IEEE6] ——, “Ef?cient power control via pricing in wireless dataA new framework for power control in wireless data networks:

  20. A Wavelet-Based Variability Model (WVM) for Solar PV Power Plants

    E-Print Network [OSTI]

    Lave, Matthew; Kleissl, Jan; Stein, Joshua S

    2013-01-01T23:59:59.000Z

    Term Variability of Solar Power," LBNL Report No. 3884E,High penetration of solar power is highly desirable from ansimilarity to the shape of solar power fluctuations [11].

  1. Envelope amplifier for broadband base-station envelope tracking power amplifier

    E-Print Network [OSTI]

    Zhu, Qiuyao

    2011-01-01T23:59:59.000Z

    represents total power loss inside the envelope ampli?er.simulator can simulate the power loss by extracting andThere are three main power losses inside the envelope ampli?

  2. Dual-Fuel Combustion Turbine Provides Reliable Power to U.S. Navy Submarine Base New London in Groton, Connecticut

    SciTech Connect (OSTI)

    Halverson, Mark A.(BATTELLE (PACIFIC NW LAB)) [BATTELLE (PACIFIC NW LAB)

    2002-01-01T23:59:59.000Z

    In keeping with a long-standing tradition of running Base utilities as a business, the U.S. Navy Submarine Base New London installed a dual-fuel combustion turbine with a heat recovery boiler. The 5-megawatt (MW) gas- and oil-fired combustion turbine sits within the Lower Base area, just off the shores of the Thames River. The U.S. Navy owns, operates, and maintains the combined heat and power (CHP) plant, which provides power to the Navy?s nuclear submarines when they are in port and to the Navy?s training facilities at the Submarine Base. Heat recovered from the turbine is used to produce steam for use in Base housing, medical facilities, and laundries. In FY00, the Navy estimates that it will save over $500,000 per year as a result of the combined heat and power unit.

  3. Reviewing PSA-based analyses to modify technical specifications at nuclear power plants

    SciTech Connect (OSTI)

    Samanta, P.K.; Martinez-Guridi, G. [Brookhaven National Lab., Upton, NY (United States); Vesely, W.E. [Science Applications International Corporation, Dublin, OH (United States)

    1995-12-01T23:59:59.000Z

    Changes to Technical Specifications (TSs) at nuclear power plants (NPPs) require review and approval by the United States Nuclear Regulatory Commission (USNRC). Currently, many requests for changes to TSs use analyses that are based on a plant`s probabilistic safety assessment (PSA). This report presents an approach to reviewing such PSA-based submittals for changes to TSs. We discuss the basic objectives of reviewing a PSA-based submittal to modify NPP TSs; the methodology of reviewing a TS submittal, and the differing roles of a PSA review, a PSA Computer Code review, and a review of a TS submittal. To illustrate this approach, we discuss our review of changes to allowed outage time (AOT) and surveillance test interval (STI) in the TS for the South Texas Project Nuclear Generating Station. Based on this experience gained, a check-list of items is given for future reviewers; it can be used to verify that the submittal contains sufficient information, and also that the review has addressed the relevant issues. Finally, recommended steps in the review process and the expected findings of each step are discussed.

  4. A Wavelet-Based Variability Model (WVM) for Solar PV Power Plants

    E-Print Network [OSTI]

    Lave, Matthew; Kleissl, Jan; Stein, Joshua S

    2013-01-01T23:59:59.000Z

    Model (WVM) for Solar PV Power Plants Matthew Lave, Janoutput of a solar photovoltaic (PV) plant was presented andsimulating solar photovoltaic (PV) power plant output given

  5. A Wavelet-Based Variability Model (WVM) for Solar PV Power Plants

    E-Print Network [OSTI]

    Lave, Matthew; Kleissl, Jan; Stein, Joshua S

    2013-01-01T23:59:59.000Z

    the WVM and other power plant simulation methods highlightedpower plant output ‘clear-sky index’ agrees with the simulationscale power plant in Copper Mountain, NV. The WVM simulation

  6. Journal of Power Sources 162 (2006) 388399 Model-based condition monitoring of PEM fuel cell using

    E-Print Network [OSTI]

    Ding, Yu

    2006-01-01T23:59:59.000Z

    Journal of Power Sources 162 (2006) 388­399 Model-based condition monitoring of PEM fuel cell using of polymer electrolyte membrane (PEM) fuel cell systems, temporary faults in such systems still might occur/uncertainty of the fuel cell system, and the measurement noise. In this research, we propose a model-based condition

  7. Dynamics, Optimization and Control of a Fuel Cell Based Combined Heat Power (CHP) System for Shipboard Applications

    E-Print Network [OSTI]

    Stefanopoulou, Anna

    Dynamics, Optimization and Control of a Fuel Cell Based Combined Heat Power (CHP) System, a natural gas fuel processor system (FPS), a proton exchange membrane fuel cell (PEM-FC) and a catalytic) systems based on fuel cells and fuel processing technologies have great potential for future shipboard

  8. Behavior-based rules for fitness-for-duty assessment of nuclear power plant personnel

    SciTech Connect (OSTI)

    Kennedy, R.S.; Turnage, J.J.; Price, H.E.; Lane, N.E.

    1989-01-01T23:59:59.000Z

    The safe and reliable operation of nuclear power plants requires that plant personnel not be under the influence of any substance, legal or illegal, or mentally or physically impaired from any cause that in any way adversely affects their ability to safely and competently perform their duties. This goal has been formalized by the US Nuclear Regulatory Commission in their proposed rule for a fitness-for-duty program. The purpose of this paper is to describe a performance-based tool based on surrogate tests and dose equivalency methodologies that is a viable candidate for fitness-for-duty assessment. The automated performance test system (APTS) is a microcomputer-based human performance test battery that has been developed over a decade of research supported variously by the National Science Foundation, National Aeronautics and Space Administration, US Department of Energy, and the US Navy and Army. Representing the most psychometrically sound test from evaluations of over 150 well-known tests of basic psychomotor and cognitive skills, the battery provides direct prediction of a worker's fitness for duty. Twenty-four tests are suitable for use, and a dozen have thus far been shown to be sensitive to the effects of legal and illegal drugs, alcohol, fatigue, stress, and other causes of impairment.

  9. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 54, NO. 1, FEBRUARY 2007 97 Distributed Intelligent Energy Management System

    E-Print Network [OSTI]

    Simões, Marcelo Godoy

    are very important for the Micro- grid. The majority of microsources must be power electronic based in the battery life is also achieved due to optimization of storage charge states using the proposed DIEMS. Index and the grid. The advantages and considerations of HFAC system will be addressed in this paper along

  10. System and method for controlling power consumption in a computer system based on user satisfaction

    DOE Patents [OSTI]

    Yang, Lei; Dick, Robert P; Chen, Xi; Memik, Gokhan; Dinda, Peter A; Shy, Alex; Ozisikyilmaz, Berkin; Mallik, Arindam; Choudhary, Alok

    2014-04-22T23:59:59.000Z

    Systems and methods for controlling power consumption in a computer system. For each of a plurality of interactive applications, the method changes a frequency at which a processor of the computer system runs, receives an indication of user satisfaction, determines a relationship between the changed frequency and the user satisfaction of the interactive application, and stores the determined relationship information. The determined relationship can distinguish between different users and different interactive applications. A frequency may be selected from the discrete frequencies at which the processor of the computer system runs based on the determined relationship information for a particular user and a particular interactive application running on the processor of the computer system. The processor may be adapted to run at the selected frequency.

  11. Probability-Based Software for Grid Optimization: Improved Power System Operations Using Advanced Stochastic Optimization

    SciTech Connect (OSTI)

    None

    2012-02-24T23:59:59.000Z

    GENI Project: Sandia National Laboratories is working with several commercial and university partners to develop software for market management systems (MMSs) that enable greater use of renewable energy sources throughout the grid. MMSs are used to securely and optimally determine which energy resources should be used to service energy demand across the country. Contributions of electricity to the grid from renewable energy sources such as wind and solar are intermittent, introducing complications for MMSs, which have trouble accommodating the multiple sources of price and supply uncertainties associated with bringing these new types of energy into the grid. Sandia’s software will bring a new, probability-based formulation to account for these uncertainties. By factoring in various probability scenarios for electricity production from renewable energy sources in real time, Sandia’s formula can reduce the risk of inefficient electricity transmission, save ratepayers money, conserve power, and support the future use of renewable energy.

  12. Progress in carbon dioxide capture and separation research for gasification-based power generation point sources

    SciTech Connect (OSTI)

    Pennline, H.; Luebke, D.; Jones, K.; Myers, C.; Morsi, B.; Heintz, Y.; Ilconich, J.

    2008-01-01T23:59:59.000Z

    The purpose of the present work is to investigate novel approaches, materials, and molecules for the abatement of carbon dioxide (CO2) at the pre-combustion stage of gasification-based power generation point sources. The capture/separation step for CO2 from large point sources is a critical one with respect to the technical feasibility and cost of the overall carbon sequestration scenario. For large point sources, such as those found in power generation, the carbon dioxide capture techniques being investigated by the Office of Research and Development of the National Energy Technology Laboratory possess the potential for improved efficiency and reduced costs as compared to more conventional technologies. The investigated techniques can have wide applications, but the present research is focused on the capture/separation of carbon dioxide from fuel gas (precombustion gas) from processes such as the Integrated Gasification Combined Cycle (IGCC) process. For such applications, novel concepts are being developed in wet scrubbing with physical sorption, chemical sorption with solid sorbents, and separation by membranes. In one concept, a wet scrubbing technique is being investigated that uses a physical solvent process to remove CO2 from fuel gas of an IGCC system at elevated temperature and pressure. The need to define an “ideal” solvent has led to the study of the solubility and mass transfer properties of various solvents. Pertaining to another separation technology, fabrication techniques and mechanistic studies for membranes separating CO2 from the fuel gas produced by coal gasification are also being performed. Membranes that consist of CO2-philic ionic liquids encapsulated into a polymeric substrate have been investigated for permeability and selectivity. Finally, processes based on dry, regenerable sorbents are additional techniques for CO2 capture from fuel gas. An overview of these novel techniques is presented along with a research progress status of technologies related to membranes and physical solvents.

  13. A knowledge-based system for control of xenon-induced spatial power oscillations during load-follow operations

    SciTech Connect (OSTI)

    Chung, Sun-Kyo; Danofsky, R.A.; Spinrad, B.I.

    1988-01-01T23:59:59.000Z

    As is well known, large pressurized water reactors (PWRs) are subject to xenon-induced axial power oscillations at some time during a given cycle. Attention to this behavior is required during load-follow operations. A knowledge-based system for controlling xenon-induced spatial power oscillations is described. Experience with a limited set of load-follow patterns has demonstrated that the system is capable of providing advice on appropriate control actions. A simulation model, coupled with a rule-learning process, has been found to be a useful way for determining appropriate weights for the rules that relate power patterns and control actions.

  14. Thermomechanical Characterization and Analysis of Insulation Materials for Nuclear-Based Space Power Systems

    SciTech Connect (OSTI)

    Hemrick, James Gordon [ORNL; Burns, Zachary M [ORNL; Ulrich, George B [ORNL

    2014-01-01T23:59:59.000Z

    Testing was carried out to characterize and predict the long-term thermomechanical properties of various thermal insulation materials for use in nuclear-based space power systems. In particular, the high temperature compressive strength and stress relaxation behavior of these materials under vacuum or an inert atmosphere and up to 950 C were evaluated under either isothermal conditions or under various thermal gradients for test times of over two years. Several tests subjected to thermal gradient conditions were also evaluated for changes in strain due to cooling or heating events. Other testing of these materials included evaluation of their response to lateral (as opposed to axial) loads, their response to triaxial loading conditions, thermal shock behavior of these materials, and shrinkage effects in these materials due to elevated temperature exposure. Additionally, finite element and mathematical models were formulated to predict the mechanical behavior exhibited by these materials out to 35,000 hours (4 years) based on this testing. This paper will summarize the design and construction of unique test equipment to carry out this testing, along with the results of the testing and the subsequent modeling.

  15. Novel Laser-Based Manufacturing of nano-LiFePO4-Based Materials for High Power Li Ion Batteries

    E-Print Network [OSTI]

    Horne, Craig R.; Jaiswal, Abhishek; Chang, On; Crane, S.; Doeff, Marca M.; Wang, Emile

    2006-01-01T23:59:59.000Z

    II “Olivines in Lithium Batteries” The Beckman Institute,for High Power Li Ion Batteries C.R. Horne 1 , A. Jaiswal

  16. Combinational logic optimization for low power using implication-based transformations

    E-Print Network [OSTI]

    Swarna, Madhukiran V.

    1997-01-01T23:59:59.000Z

    , Minpower, which reduces power consumption is presented. Heuristics and methods which help in guiding the optimization procedure towards a circuit with minimal power cost will be presented. Finally, experimental results on the ISCAS85 benchmark set and a...

  17. Control of a wind power system based on a tethered wing

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , hydraulic systems, etc. The wind turbine are certainly playing a major role in creating renewable energies overcome the drawbacks of standard power generation systems like nuclear power, gas turbine generator

  18. Electric load information system based on non-intrusive power monitoring

    E-Print Network [OSTI]

    Lee, Kwangduk Douglas, 1970-

    2003-01-01T23:59:59.000Z

    Obtaining high quality information economically and reliably is always a difficult objective to achieve. The electric power industry and consumers recently face many challenges, such as deregulation, autonomous power systems ...

  19. Combinational logic optimization for low power using implication-based transformations 

    E-Print Network [OSTI]

    Swarna, Madhukiran V.

    1997-01-01T23:59:59.000Z

    The demand for portable equipment has increased the emphasis on low-power designs. Higher power consumption results in shorter battery-lifetime of portable electronic devices. As a result larger batteries are required for ...

  20. An air-breathing, portable thermoelectric power generator based on a microfabricated silicon combustor

    E-Print Network [OSTI]

    Marton, Christopher Henry

    2011-01-01T23:59:59.000Z

    The global consumer demand for portable electronic devices is increasing. The emphasis on reducing size and weight has put increased pressure on the power density of available power storage and generation options, which ...

  1. RTDS-Based Design and Simulation of Distributed P-Q Power Resources in Smart Grid

    E-Print Network [OSTI]

    Taylor, Zachariah David

    2014-01-01T23:59:59.000Z

    1.2 MW grid-connected solar panel at bus 8. The power outputis as in Figure 5.11 [104]. Solar Panel Power Injection (pu)The daily output of the solar panel during a cloudy day.

  2. MARCH 6, 2007 1 Packet-Based Power Allocation for Forward

    E-Print Network [OSTI]

    Kuzmanovic, Aleksandar

    the time-averaged utility rate, subject to a constraint on the probability that the total power exceeds examples illustrate the achievable utility rate and power allocation as a function of the packet arrival

  3. A DSP based real time power quality measurement system with voltage distortion improvement capability 

    E-Print Network [OSTI]

    Gou, Jian

    1992-01-01T23:59:59.000Z

    have been established to specify the limitation on the magnitudes of both harmonic currents and harmonic voltage distortion at different frequencies. Among these the "IEEE Guide for Harmonic Control and Reactive Compensation of Static Power... by the utility and by the electricity consumer has arrived. These measurements include: current and voltage harmonics, input power 1'actor, reactive power, real power, total harmonic distortion (THD), percentage load unbalance, etc. The measured data can...

  4. Ancillary Frequency Control of Direct Drive Full-Scale Converter Based Wind Power Plants

    E-Print Network [OSTI]

    Chen, Zhe

    as the studied power system. Simulation results show that the proposed control strategies are effective means into the modern power systems. In Denmark, the wind energy supplies around 20% of the annual electricity demand system frequency control solutions, such as frequency control from wind power plants may be needed

  5. A Zonotope-Based Method for Capturing the Effect of Variable Generation on the Power Flow

    E-Print Network [OSTI]

    Liberzon, Daniel

    of a power system; this uncertainty arises from the increasing penetration of renewable resources that the uncertain generation can take by a zonotope and propagate it through a linearized power flow model take values within a symmetric polytope. This uncertainty is propagated through the power system model

  6. Power-Optimal Scheduling for a Green Base Station with Delay Constraints

    E-Print Network [OSTI]

    Sharma, Vinod

    by renewable energy sources, e.g. solar/wind energy and may also be connected to the power grid or diesel model for packet-switched networks. The power function is a non-decreasing convex function of the queue present a model of the total BS power consumption. In Section III, we discuss the system model

  7. Frequency Prediction of Power Systems in FNET based on State Space Approach and Uncertain Basis

    E-Print Network [OSTI]

    Li, Husheng

    , control, and protection of power systems and electric equipments because when a significant disturbance model in order to optimize the efficiency and reliability of power systems in the Frequency Monitoring. However, controlling and protecting power systems requires an accurate estimate of frequencies in real

  8. A Resilient Real-Time Agent-Based System for a Reconfigurable Power Grid

    E-Print Network [OSTI]

    Tolbert, Leon M.

    grid, collaboration, fault resiliency I. INTRODUCTION T he electric power industry in the 21st Century devices. The Electric Power Research Institute (EPRI) estimates that the annual economic losses from the information technology (IT) infrastructure level and the device level. Specifically, the reformed power grid

  9. Design and performance of radioisotope space power systems based on OSC multitube AMTEC converter designs

    SciTech Connect (OSTI)

    Schock, A.; Noravian, H.; Or, C. [Orbital Sciences Corp., Germantown, MD (United States)

    1997-12-31T23:59:59.000Z

    This paper extends the analytical procedure described in another paper in these proceedings to analyze a variety of compact and light-weight OSC-designed radioisotope-heated generators. Those generators employed General Purpose Heat Source (GPHS) modules and a converter containing sixteen AMTEC cells of OSC`s revised five-tube design with enhanced cell wall reflectivity described in a companion paper in these proceedings. OSC found that the performance of the generator is primarily a function of the thermal insulation between the outside of the generator`s 16 cells and the inside of its wall. After examining a variety of insulation options, it was found that the generator`s performance is optimized by employing a hybrid insulation system, in which the space between the cells is filled with fibrous Min-K insulation, and the generator walls are lined with tapered (i.e., graded-length) multifoil insulation. The OSC design results in a very compact generator, with eight AMTEC cells on each end of the heat source stack. The choice of the five-tube cells makes it possible to expand the BASE tube diameter without increasing the cell diameter. This is important because the eight cells mate well with the stacked GPHS modules. The OSC generator design includes a compliant heat source support and preload arrangement, to hold the heat source modules together during launch, and to maintain thermal contact conductance at the generator`s interfaces despite creep relaxation of its housing. The BOM and EOM (up to 15 years) performances of the revised generators were analyzed for two and three GPHS modules, both for fresh fuel and for aged fuel left over from a spare RTG (Radioisotope Thermoelectric Generator) fueled in 1982. The resulting power outputs were compared with JPL`s latest EOM power demand goals for the Pluto Express and Europa Orbiter missions, and with the generic goals of DOE`s Advanced Radioisotope Power System (ARPS) study. The OSC AMTEC designs yielded system efficiencies three to four times as high as present-generation RTGs.

  10. Environmental externalities: An ASEAN application to coal-based power generation. Extract

    SciTech Connect (OSTI)

    Szpunar, C.B.; Gillette, J.L.

    1992-06-01T23:59:59.000Z

    Significant benefits to human health that result from emissions control programs may justify the costs of pollution control policies. Many scientists, economists, risk analysts, and policymakers believe that comparisons of the benefits with the costs of pollution control demonstrate that the US stationary source, air emissions control program is justified. This justification is based upon pronounced benefits to human health, especially from controlling suspended particulates and sulfur compounds. Market decisions are usually made on the basis of a consideration of traditional costs such as capital, operating and maintenance, fuel costs, and fixed charges. Social costs, which could be significant, are not incorporated explicitly into such decisions. These social costs could result in a net reduction in the welfare of individuals, and of society as a whole. Because these social costs and their effects are not represented in the price of energy, individual have no way to explicitly value them; hence, they remain unaccounted for in market decisions. By accounting for external costs, the selection of energy sources and production of energy products can lead to and equilibrium, where the total cost of energy and energy products, together with resulting social costs, can be brought to an economic minimum. The concept of an air emissions control program is of interest to the ASEAN countries (Brunei, Indonesia, Malaysia, the Philippines, Singapore, and Thailand) and their governments, especially if such a program could be justified in cost-benefit terms and shown to be directly applicable to ASEAN conditions. It is the intent of the effort described herein to demonstrate that technical options are available to control emissions from coal-based, electric power plants and that that costs of these options may be justified in cost-benefit terms.

  11. Miniaturized Low-power Electro-optic Modulator Based on Silicon Integrated Nanophotonics and Organic Polymers

    E-Print Network [OSTI]

    Zhang, Xingyu; Luo, Jingdong; Jen, Alex K -Y; Chen, Ray T

    2014-01-01T23:59:59.000Z

    We design and demonstrate a compact, low-power, low-dispersion and broadband optical modulator based on electro-optic (EO) polymer refilled silicon slot photonic crystal waveguide (PCW). The EO polymer is engineered for large EO activity and near-infrared transparency. The half-wave switching-voltage is measured to be V{\\pi}=0.97V over optical spectrum range of 8nm, corresponding to a record-high effective in-device r33 of 1190pm/V and V{\\pi} L of 0.291Vmm in a push-pull configuration. Excluding the slow-light effect, we estimate the EO polymer is poled with an ultra-high efficiency of 89pm/V in the slot. In addition, to achieve high-speed modulation, silicon PCW is selectively doped to reduce RC time delay. The 3-dB RF bandwidth of the modulator is measured to be 11GHz, and a modulation response up to 40GHz is observed.

  12. Development of a Dry Sorbent-based Post-Combustion CO2 Capture Technology for Retrofit in Existing Power Plants

    SciTech Connect (OSTI)

    Nelson, Thomas; Coleman, Luke; Anderson, Matthew; Gupta, Raghubir; Herr, Joshua; Kalluri, Ranjeeth; Pavani, Maruthi

    2009-12-31T23:59:59.000Z

    The objective of this research and development (R&D) project was to further the development of a solid sorbent-based CO2 capture process based on sodium carbonate (i.e. the Dry Carbonate Process) that is capable of capturing>90% of the CO2 as a nearly pure stream from coal-fired power plant flue gas with <35% increase in the cost of electrictiy (ICOE).

  13. Short-term Wind Power Prediction for Offshore Wind Farms -Evaluation of Fuzzy-Neural Network Based Models

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Short-term Wind Power Prediction for Offshore Wind Farms - Evaluation of Fuzzy-Neural Network Based of offshore farms and their secure integration to the grid. Modeling the behavior of large wind farms presents the new considerations that have to be made when dealing with large offshore wind farms

  14. PEV-based P-Q Control in Line Distribution Networks with High Requirement for Reactive Power Compensation

    E-Print Network [OSTI]

    Huang, Jianwei

    no P-Q control is conducted at PEV charging stations. Keywords--Plug-in electric vehicles, reactive1 PEV-based P-Q Control in Line Distribution Networks with High Requirement for Reactive Power-Rad, Member, IEEE, and Jianwei Huang, Senior Member, IEEE Abstract--While plug-in electric vehicles (PEVs

  15. A Novel Si-Tunnel FET based SRAM Design for Ultra Low-Power 0.3V VDD Applications

    E-Print Network [OSTI]

    Yener, Aylin

    A Novel Si-Tunnel FET based SRAM Design for Ultra Low-Power 0.3V VDD Applications J. Singh, K-Band Tunnel Field Effect Transistors (TFETs) in SRAMs at ultra low supply voltages. The uni design using Si- TFETs for reliable operation with low leakage at ultra low voltages. We also demonstrate

  16. Energy management of power-split plug-in hybrid electric vehicles based on simulated annealing and Pontryagin's minimum principle

    E-Print Network [OSTI]

    Mi, Chunting "Chris"

    Energy management of power-split plug-in hybrid electric vehicles based on simulated annealing Accepted 14 August 2014 Available online 27 August 2014 Keywords: Plug-in hybrid electric vehicles Fuel-rate Pontryagin's minimum principle Simulated annealing State of health a b s t r a c t In this paper, an energy

  17. Study of seismic design bases and site conditions for nuclear power plants

    SciTech Connect (OSTI)

    Not Available

    1980-04-01T23:59:59.000Z

    This report presents the results of an investigation of four topics pertinent to the seismic design of nuclear power plants: Design accelerations by regions of the continental United States; review and compilation of design-basis seismic levels and soil conditions for existing nuclear power plants; regional distribution of shear wave velocity of foundation materials at nuclear power plant sites; and technical review of surface-founded seismic analysis versus embedded approaches.

  18. A Cycle-Based Formulation and Valid Inequalities for DC Power ...

    E-Print Network [OSTI]

    Burak Kocuk

    2014-12-19T23:59:59.000Z

    Dec 19, 2014 ... Abstract: It is well-known that optimizing network topology by switching on and off transmission lines improves the efficiency of power delivery in ...

  19. A Wavelet-Based Variability Model (WVM) for Solar PV Power Plants

    E-Print Network [OSTI]

    Lave, Matthew; Kleissl, Jan; Stein, Joshua S

    2013-01-01T23:59:59.000Z

    Power characteristics of PV ensembles: experiences from theproduction of 100 grid connected PV systems distributed overHoff and R. Perez, "Modeling PV Fleet Output Variability,"

  20. Experimental Validation of Voltage-Based State-of-Charge Algorithm for Power Batteries

    E-Print Network [OSTI]

    Jia, Zhuo

    2013-01-01T23:59:59.000Z

    for nickel metal hydride batteries including hysteresis” ,Control of Lithium-Ion Batteries”, Control Systems, IEEE,modeling of lead acid batteries”, Applied Power Electronics

  1. Tight MIP Formulations of the Power-Based Unit Commitment Problem

    E-Print Network [OSTI]

    Germán Morales-España

    2014-07-08T23:59:59.000Z

    Jul 8, 2014 ... In the conventional UC problem, power schedules are used to ... Category 2: Applications -- OR and Management Sciences (Scheduling ).

  2. advanced coal-based power: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    . . . . 18 3.4.1 Heat Exchanger - Code description . . . . . . . . . . . . . . . 18 3.4.2 Simulation ResultsADVANCED POWER PLANT MODELING WITH APPLICATIONS TO THE ADVANCED BOILING...

  3. Novel Laser-Based Manufacturing of nano-LiFePO4-Based Materials for High Power Li Ion Batteries

    E-Print Network [OSTI]

    Horne, Craig R.; Jaiswal, Abhishek; Chang, On; Crane, S.; Doeff, Marca M.; Wang, Emile

    2006-01-01T23:59:59.000Z

    17-18, 2007 Novel Laser-Based Manufacturing of nano-LiFePO 4laser-based process for synthesizing nanomaterials, NanoParticle Manufacturing (

  4. Critical Node Identification of Smart Power System Using Complex Network Framework Based

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    transmission networks, in which a DC power flow model and overloading of lines is embedded into the traditional or node removal can cause serious impact on normal system operation. Removal of transmission lines from characteristics and complex network theory together. Particularly, electric power networks are quite different

  5. Power factor correction of an electrical drive system based on multiphase machines

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    both in wind energy conversion or motor drive applications. A power factor (PF) control scheme is to maintain the PF of the power-winding, of the double star induction machine, in vicinity of unity whatever signify a machine with more than three phases in the stator side. So, the number of phases can be used

  6. Voltage Stability and Frequency Synchronization of Weak Power Distribution Networks with Inverter-Based

    E-Print Network [OSTI]

    Lemmon, Michael

    a part of microgrids, are incorporated to improve power quality and reliability when disruptions happen of microgrids [13], together with oth- er generation, storage and load units. These microgrid- s are installedVoltage Stability and Frequency Synchronization of Weak Power Distribution Networks with Inverter

  7. A Review of Power Electronics Based Microgrids 181 JPE 12-1-23 http://dx.doi.org/10.6113/JPE.2012.12.1.181

    E-Print Network [OSTI]

    Chen, Zhe

    is followed by the descriptions of system controls and power management strategies for AC microgrids. Finally, but enables also microgrids to control and manage the power and energy flows efficiently [6]­[9]. FurthermorA Review of Power Electronics Based Microgrids 181 JPE 12-1-23 http://dx.doi.org/10.6113/JPE.2012

  8. Power Control for Efficient Multicasting in IP-based 3G and beyond mobile Neophytos Vlotomas, Josephine Antoniou, George Hadjipollas, Vasos Vassiliou, Andreas

    E-Print Network [OSTI]

    Pitsillides, Andreas

    Power Control for Efficient Multicasting in IP-based 3G and beyond mobile networks Neophytos quality of service over the radio interface. Power Control is the mechanism responsible for keeping signal approaches for efficient power control in the case of multicast services for 3G and beyond mobile networks

  9. IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, VOL. 6, NO. 4, DECEMBER 1998 707 Algorithm-Based Low-Power Transform Coding

    E-Print Network [OSTI]

    Hung, Shih-Hao

    Algorithm-Based Low-Power Transform Coding Architectures: The Multirate Approach An-Yeu Wu, Member, IEEE to design low-power transform coding architectures, in which the transform coefficients are computed through at the architectural level. We start with the design of low- power multirate discrete cosine transform (DCT

  10. Carbon Dioxide Capture and Separation Techniques for Gasification-based Power Generation Point Sources

    SciTech Connect (OSTI)

    Pennline, H.W.; Luebke, D.R.; Jones, K.L.; Morsi, B.I. (Univ. of Pittsburgh, PA); Heintz, Y.J. (Univ. of Pittsburgh, PA); Ilconich, J.B. (Parsons)

    2007-06-01T23:59:59.000Z

    The capture/separation step for carbon dioxide (CO2) from large-point sources is a critical one with respect to the technical feasibility and cost of the overall carbon sequestration scenario. For large-point sources, such as those found in power generation, the carbon dioxide capture techniques being investigated by the in-house research area of the National Energy Technology Laboratory possess the potential for improved efficiency and reduced costs as compared to more conventional technologies. The investigated techniques can have wide applications, but the research has focused on capture/separation of carbon dioxide from flue gas (post-combustion from fossil fuel-fired combustors) and from fuel gas (precombustion, such as integrated gasification combined cycle or IGCC). With respect to fuel gas applications, novel concepts are being developed in wet scrubbing with physical absorption; chemical absorption with solid sorbents; and separation by membranes. In one concept, a wet scrubbing technique is being investigated that uses a physical solvent process to remove CO2 from fuel gas of an IGCC system at elevated temperature and pressure. The need to define an ideal solvent has led to the study of the solubility and mass transfer properties of various solvents. Pertaining to another separation technology, fabrication techniques and mechanistic studies for membranes separating CO2 from the fuel gas produced by coal gasification are also being performed. Membranes that consist of CO2-philic ionic liquids encapsulated into a polymeric substrate have been investigated for permeability and selectivity. Finally, dry, regenerable processes based on sorbents are additional techniques for CO2 capture from fuel gas. An overview of these novel techniques is presented along with a research progress status of technologies related to membranes and physical solvents.

  11. High-power efficient cw and pulsed lasers based on bulk Yb : KYW crystals with end diode pumping

    SciTech Connect (OSTI)

    Kim, G H; Yang, G H; Lee, D S; Kulik, Alexander V; Sall', E G; Chizhov, S A; Yashin, V E; Kang, U

    2012-04-30T23:59:59.000Z

    End-diode-pumped lasers based on one and two Yb : KYW crystals operating in cw and Q-switched regimes, as well as in the regime of mode-locking, are studied. The single-crystal laser generated stable ultrashort (shorter than 100 fs) laser pulses at wavelengths of 1035 and 1043 nm with an average power exceeding 1 W. The average output power of the two-crystal laser exceeded 18 W in the cw regime and 16 W in the Q-switched regime with a slope efficiency exceeding 30%.

  12. The development of low cost LiFePO4-based high power lithium-ion batteries

    SciTech Connect (OSTI)

    Shim, Joongpyo; Sierra, Azucena; Striebel, Kathryn A.

    2003-11-25T23:59:59.000Z

    The cycling performance of low-cost LiFePO4-based high-power lithium-ion cells was investigated and the components were analyzed after cycling to determine capacity fade mechanisms. Pouch type LiFePO4/natural graphite cells were assembled and evaluated by constant C/2 cycling, pulse-power and impedance measurements. From post-test electrochemical analysis after cycling, active materials, LiFePO4 and natural graphite, showed no degradation structurally or electrochemically. The main reasons for the capacity fade of cell were lithium inventory loss by side reaction and possible lithium deposition on the anode.

  13. Microsoft PowerPoint - ITA Webinar_Miller_APPROVED_2009_09_04...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MODERN GRID S T R A T E G Y Smart Grid Key Technology Areas Smart meters Smart sensors Demand Response DG dispatch Distribution automation Micro-grids Markets Work force management...

  14. New approaches to improve the performance of the PEM based fuel cell power systems

    E-Print Network [OSTI]

    Choi, Woojin

    2005-11-01T23:59:59.000Z

    Fuel cells are expected to play an important role in future power generation. However, significant technical challenges remain and the commercial breakthrough of fuel cells is hindered by the high price of fuel cell components. As is well known...

  15. Optimization and hybridization of membrane-based oxy-combustion power plants

    E-Print Network [OSTI]

    Gunasekaran, Surekha

    2013-01-01T23:59:59.000Z

    This thesis considers the optimization and hybridization of advanced zero emissions power (AZEP) cycles. More specifically, existing flowsheets for zero and partial emissions are optimized, and new integration schemes with ...

  16. New approaches to improve the performance of the PEM based fuel cell power systems 

    E-Print Network [OSTI]

    Choi, Woojin

    2005-11-01T23:59:59.000Z

    Fuel cells are expected to play an important role in future power generation. However, significant technical challenges remain and the commercial breakthrough of fuel cells is hindered by the high price of fuel cell ...

  17. Observer-based control of a tethered wing wind power system: indoor real-time experiment

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . A third solution is to use power kites as renewable energy generators [3]. One can cite the "Kite Wind Generator" of Politecnico di Torino [6], [5] and the "Laddermill" of the Delft University of Technology [13

  18. Control of a Powered Ankle–Foot Prosthesis Based on a Neuromuscular Model

    E-Print Network [OSTI]

    Geyer, Hartmut

    Control schemes for powered ankle-foot prostheses rely upon fixed torque-ankle state relationships obtained from measurements of intact humans walking at target speeds and across known terrains. Although effective at their ...

  19. A neuromuscular-model based control strategy for powered ankle-foot prostheses

    E-Print Network [OSTI]

    Eilenberg, Michael Frederick

    2009-01-01T23:59:59.000Z

    In the development of a powered ankle-foot prosthesis, it is desirable to provide the prosthesis with the ability to exhibit human-like dynamics. A simple method for achieving this goal involves trajectory tracking, where ...

  20. Research on a new active power filter topology based on chopper circuit

    E-Print Network [OSTI]

    Xiaoling, Guo; Bo, Zhang; Jing, Zhang

    2015-01-01T23:59:59.000Z

    The active power filter (APF) is attracting more and more attention for its outstanding performance in current and voltage ripple compensation. As modern high-energy accelerators are demanding much more stringent current ripple guideline, the APF is introduced to the magnet power supply (MPS) in accelerator system. However, the conventional APF has a lot of shortages and drawbacks due to its traditional topology, such as complex structure, nonadjustable working voltage, requirement of power supply, and so on. This paper proposes a new topology of APF, which is working as two types of chopper circuits. This APF need not extra electricity, but to use the power of the MPS current ripple to realize ripple depressing. At the end of this paper, the experiment result proves its feasibility and effect.

  1. A Geometrical Approach for Power Optimization in Relay-Based Cellular

    E-Print Network [OSTI]

    Coupechoux, Marceau

    ,2 , Maode Ma1 , Marceau Coupechoux2 , and Philippe Godlewski2 1 Nanyang Technological University, Nanyang.edu.sg (Maode Ma); coupecho@enst.fr (Marceau Coupechoux); godlewsk@enst.fr (Philippe Godlewski) power allocation

  2. Towards "Zero-energy" using NEMFET-based Power Management for 3D Hybrid Stacked ICs

    E-Print Network [OSTI]

    Kuzmanov, Georgi

    potentially autonomous "zero-energy" devices. Index Terms--Low power electronics, Energy efficiency, Na experiment we believe that such 3D hybrid NEMS/CMOS approach creates the premises for the substantial

  3. IEEE MICROWAVE AND GUIDED WAVE LETTERS, VOL. 9, NO. 7, JULY 1999 277 18-GHz GaN-Based Power Amplifier

    E-Print Network [OSTI]

    York, Robert A.

    IEEE MICROWAVE AND GUIDED WAVE LETTERS, VOL. 9, NO. 7, JULY 1999 277 1­8-GHz GaN-Based Power, Senior Member, IEEE Abstract-- We report the first gallium nitride (GaN)-based broad-band power amplifier. The circuit was fabricated on an AlN substrate using AlGaN/GaN power high-electron mobil- ity transistors

  4. Elevated Temperature Materials for Power Generation and Propulsion The energy industry is designing higher-efficiency land-based turbines for natural gas-fired

    E-Print Network [OSTI]

    Li, Mo

    Elevated Temperature Materials for Power Generation and Propulsion The energy industry is designing higher-efficiency land-based turbines for natural gas-fired power generation systems. The high inlet materials for these aggressive environments. For example, Ni-base superalloys are used to fabricate blades

  5. Potential Environmental Impacts of Hydrogen-based Transportation and Power Systems

    SciTech Connect (OSTI)

    Grieb, Thomas M.; Mills, W. B.; Jacobson, Mark Z.; Summers, Karen V.; Crossan, A. Brook

    2010-12-31T23:59:59.000Z

    Hydrogen (H2) offers advantages as an energy carrier: minimal discharge of pollutants, production from multiple sources, increased thermodynamic efficiencies compared to fossil fuels, and reduced dependence on foreign oil. However, potential impacts from the H2 generation processes, transport and distribution of H2, and releases of H2 into the atmosphere have been proposed. The goal of this project was to analyze the effects of emissions of hydrogen, the six criteria pollutants and greenhouse gases on climate, human health, materials and structures. This project was part of a larger effort by DOE to assess the life-cycle costs and benefits and environmental impacts to inform decisions regarding future hydrogen research. Technical Approach: A modeling approach was developed and used to evaluate the potential environmental effects associated with the conversion of the on-road vehicle fleet from fossil-fuel vehicles to hydrogen fuel cell vehicles. GATOR-GCMOM was the primary tool used to predict atmospheric concentrations of gases and aerosols for selected scenarios. This model accounts for all feedbacks among major atmospheric processes based on first principles. The future scenarios and the emission rates selected for this analysis of hydrogen environmental effects are based on the scenarios developed by IPCC. The scenarios selected for the model simulations are a 2000 and 2050 A1B base cases, and a 2050 A1B case with hydrogen fuel cell vehicles (HFCVs). The hydrogen fuel cell scenario assumed conversion of 90% of fossil-fuel on-road vehicles (FFOV) in developed countries and 45% of FFOVs vehicles in other countries to HFCVs, with the H2 produced by steam-reforming of natural gas (SHFCVs). Simulations were conducted to examine the effect of converting the world�s FFOVs to HFCVs, where the H2 is produced by wind-powered electrolysis (WHFCVs). In all scenarios a 3% leakage of H2 consumed was assumed. Two new models were developed that provide the ability to evaluate a wider range of conditions and address some of the uncertainties that exist in the evaluation of hydrogen emissions. A simplified global hydrogen cycle model that simulates hydrogen dynamics in the troposphere and stratosphere was developed. A Monte Carlo framework was developed to address hydrogen uptake variability for different types of ecosystems. Findings 1.Converting vehicles worldwide in 2050 to SHFCVs at 90% penetration in developed countries and 45% penetration in other countries is expected to reduce NOx, CO, CO2, CH4, some other organic gases, ozone, PAN, black carbon, and other particle components in the troposphere, but may increase some other organic gases, depending on emissions. Conversion to SHFCVs is also expected to cool the troposphere and warm the stratosphere, but to a lesser extent than WHFCVs. Finally, SHFCVs are expected to increase UTLS ozone while decreasing upper stratospheric ozone, but to a lesser extent than WHFCVs. 2.The predicted criteria pollutant concentrations from the GATOR-GCMOM simulations indicated that near-surface annual mean concentrations in the US are likely to increase from the 2000 base case to the 2050 A1B base case for CO2 and ozone due to the increased economic activity, but to decrease for CO, NO2, SO2, and PM10 due to improved pollution control equipment and energy efficiencies. The shift to SHFCVs in 2050 was predicted to result in decreased concentrations for all the criteria pollutants, except for SO2 and PM10. The higher predicted concentrations for SO2 and PM10 were attributed to increased emissions using the steam-reforming method to generate H2. If renewable methods such as wind-based electrolysis were used to generate H2, the emissions of SO2 and PM10 would be lower. 3.The effects on air quality, human health, ecosystem, and building structures were quantified by comparing the GATOR-GCMOM model output and accepted health and ecosystem effects levels and ambient air quality criteria. Shifting to HFCVs is expected to result in improved air quality and benefits to human health. Shifting

  6. Technical basis for environmental qualification of microprocessor-based safety-related equipment in nuclear power plants

    SciTech Connect (OSTI)

    Korsah, K.; Wood, R.T. [Oak Ridge National Lab., TN (United States); Hassan, M. [Brookhaven National Lab., Upton, NY (United States); Tanaka, T.J. [Sandia National Labs., Albuquerque, NM (United States)

    1998-01-01T23:59:59.000Z

    This document presents the results of studies sponsored by the Nuclear Regulatory Commission (NRC) to provide the technical basis for environmental qualification of computer-based safety equipment in nuclear power plants. The studies were conducted by Oak Ridge National Laboratory (ORNL), Sandia National Laboratories (SNL), and Brookhaven National Laboratory (BNL). The studies address the following: (1) adequacy of the present test methods for qualification of digital I and C systems; (2) preferred (i.e., Regulatory Guide-endorsed) standards; (3) recommended stressors to be included in the qualification process during type testing; (4) resolution of need for accelerated aging for equipment to be located in a benign environment; and (5) determination of an appropriate approach for addressing the impact of smoke in digital equipment qualification programs. Significant findings from the studies form the technical basis for a recommended approach to the environmental qualification of microprocessor-based safety-related equipment in nuclear power plants.

  7. Modelling approach for the Simulation-Based Preliminary Design of Power Transmissions

    E-Print Network [OSTI]

    Boyer, Edmond

    ). Keywords: ball-screw, flight control, inverse simulation, model based design, Modelica, modelling

  8. Systems and methods for providing power to a load based upon a control strategy

    DOE Patents [OSTI]

    Perisic, Milun; Kajouke, Lateef A; Ransom, Ray M

    2013-12-24T23:59:59.000Z

    Systems and methods are provided for an electrical system. The electrical system includes a load, an interface configured to receive a voltage from a voltage source, and a controller configured to receive the voltage from the voltage source through the interface and to provide a voltage and current to the load. Wherein, when the controller is in a constant voltage mode, the controller provides a constant voltage to the load, when the controller is in a constant current mode, the controller provides a constant current to the load, and when the controller is in a constant power mode, the controller provides a constant power to the load.

  9. Hybrid solid state laser system using a neodymium-based master oscillator and an ytterbium-based power amplifier

    DOE Patents [OSTI]

    Payne, Stephen A. (Castro Valley, CA); Marshall, Christopher D. (Livermore, CA); Powell, Howard T. (Livermore, CA); Krupke, William F. (Pleasanton, CA)

    2001-01-01T23:59:59.000Z

    In a master oscillator-power amplifier (MOPA) hybrid laser system, the master oscillator (MO) utilizes a Nd.sup.3+ -doped gain medium and the power amplifier (PA) utilizes a diode-pumped Yb.sup.3+ -doped material. The use of two different laser gain media in the hybrid MOPA system provides advantages that are otherwise not available. The Nd-doped gain medium preferably serves as the MO because such gain media offer the lowest threshold of operation and have already been engineered as practical systems. The Yb-doped gain medium preferably serves in the diode-pumped PA to store pump energy effectively and efficiently by virtue of the long emission lifetime, thereby reducing diode pump costs. One crucial constraint on the MO and PA gain media is that the Nd and Yb lasers must operate at nearly the same wavelength. The 1.047 .mu.m Nd:YLF/Yb:S-FAP [Nd:LiYF.sub.4 /Yb:Sr.sub.5 (PO.sub.4).sub.3 F] hybrid MOPA system is a preferred embodiment of the hybrid Nd/Yb MOPA.

  10. Energy 32 (2007) 406417 Modeling and control of a SOFC-GT-based autonomous power system

    E-Print Network [OSTI]

    Foss, Bjarne A.

    2007-01-01T23:59:59.000Z

    including natural gas will be a major source of energy. With today's increasing concern about global warming, thus emitting less per kWh produced, and also power production processes with CO2 capture capabilities directly to electrical energy. The electrical efficiency of a SOFC can reach 55%. Another significant

  11. Unbiased MMSE-Based Noise Power Estimation with Low Complexity and Low Tracking Delay

    E-Print Network [OSTI]

    the noise power estimator from subsequent steps in a speech enhancement framework, such as the estimation estimation, speech enhancement. I. INTRODUCTION AS digital speech communication devices, such as hearing aids communicating while walking along the street. The aim of speech enhancement algorithms is to reduce the additive

  12. POWER EVALUATION FOR FLUTTER-BASED ELECTROMAGNETIC ENERGY HARVESTER USING CFD SIMULATIONS

    E-Print Network [OSTI]

    Stanford University

    as well as the optimum load resistance. Results are supported by wind tunnel tests conducted. 1 has long been used to generate power mostly using wind turbines by exploiting the blades' lift conducted myriad wind tunnel tests to understand the flutter phenomenon using scaled structural models

  13. Probabilistic Optimal Power Flow in Electricity Markets Based on a Two-Point Estimate Method

    E-Print Network [OSTI]

    Cañizares, Claudio A.

    in an "unpredictable" manner; hence, probability distributions of locational marginal prices are calculated as a result unpredictable, which can be considered as one of the main factors for electricity price volatility in some markets. Another "by- product" of deregulation is the reduction in power system stability margins

  14. Fuzzy Based Energy Management Control of A Hybrid Fuel Cell Auxiliary Power System

    E-Print Network [OSTI]

    Simões, Marcelo Godoy

    battery auxiliary power unit (APU) for remote applications where a fuel cell is the main energy source for decentralized or distributed energy production, such as telecom, remote sites or even for military applications by hydrogen cartridges a fuel cell has nearly no noise operation, providing electricity and heat with water

  15. Constraint-based Evolutionary QoS Adaptation for Power Utility Communication Networks

    E-Print Network [OSTI]

    Suzuki, Jun

    Champrasert, Junichi Suzuki and Tetsuo Otani Department of Computer Science University of Massachusetts power stations to consumers through a number of substations. Recently, the commu- nication networks consumers through a chain of substations. Each substation is re- sponsible for a certain physical regio

  16. Power-control based scheduling for commercial transatlantic flights Husam Fahmi, Seowoo Jang and Saewoong Bahk

    E-Print Network [OSTI]

    Bahk, Saewoong

    the flight times/pattern of transatlantic flight to provide an efficient transmission schedule for all nodes. The scheme also dynamically changes transmission power according to traffic rate and node density expects high quality connectivity in any place and at any time. Cell towers utilizing 4G/3G technology

  17. PROPAGATION ALGORITHM OF BEHAVIOR PROBABILITY IN POWER ESTIMATION BASED ON MULTIPLE-VALUED LOGIC

    E-Print Network [OSTI]

    Pedram, Massoud

    ()(if0 ;)1()(if1 )( jxjx jxjx jx ii ii i #12;2 From Eq.(1), we can obtain the corresponding flow chart dissipation. The energy required to charge or discharge the load capacitance of each device's output node i node gradually, then the total power dissipation can be obtained in the end. However, this flow has

  18. A Constraint-based Application Model and Scheduling Techniques for Power-aware Systems

    E-Print Network [OSTI]

    Chou, Pai H.

    pack and a solar This research was sponsored by DARPA under contract F33615- 00-1-1719 Permission-89791-88-6/97/05...$5.00. panel to operate under extremely harsh weather and power condi- tions for hundreds of days. Such systems sufficient to find just one good design point; instead, the same design must cover a range of behaviors

  19. Partition Based Cascaded Generator Scheduling with Constraints for Large Power Networks

    E-Print Network [OSTI]

    Kundur, Deepa

    must be revisited. In this paper, we focus on the generator scheduling problem in smart grid comprehensive view for planning in the smart grid. Given the mammoth size of the power networks, we propose]. In addition, the smart grid vision in- corporates consumer-driven and regulator-driven policies

  20. Estimation of A Sensitivity-Based Metric for Detecting Market Power

    E-Print Network [OSTI]

    about network topology and parameters as well as the rules used to operate the market. While computing of the information. In this paper we suggest a method for estimating the M-matrix by using publicly available data to measure market power ([1], [3]). The This project was support in part by the US Department of Energy

  1. Zero-Crossing-Based Ultra-Low-Power A/D Converters

    E-Print Network [OSTI]

    Lee, Hae-Seung

    Since the first demonstration of a comparator-based switched-capacitor circuit, analog-to-digital (A/D) converters based on virtual ground detection have made steady and significant progress. Comparators have been replaced ...

  2. A Wavelet-Based Variability Model (WVM) for Solar PV Power Plants

    E-Print Network [OSTI]

    Lave, Matthew; Kleissl, Jan; Stein, Joshua S

    2013-01-01T23:59:59.000Z

    Lave et al. A Wavelet-based Variability Model (WVM)for Solar PV Powerplants A Wavelet-based Variability Model (Joshua S. Stein Abstract – A wavelet variability model (WVM)

  3. Battery-free Wireless Sensor Network For Advanced Fossil-Fuel Based Power Generation

    SciTech Connect (OSTI)

    Yi Jia

    2011-02-28T23:59:59.000Z

    This report summarizes technical progress achieved during the project supported by the Department of Energy under Award Number DE-FG26-07NT4306. The aim of the project was to conduct basic research into battery-free wireless sensing mechanism in order to develop novel wireless sensors and sensor network for physical and chemical parameter monitoring in a harsh environment. Passive wireless sensing platform and five wireless sensors including temperature sensor, pressure sensor, humidity sensor, crack sensor and networked sensors developed and demonstrated in our laboratory setup have achieved the objective for the monitoring of various physical and chemical parameters in a harsh environment through remote power and wireless sensor communication, which is critical to intelligent control of advanced power generation system. This report is organized by the sensors developed as detailed in each progress report.

  4. Optimal meter placement and transaction-based loss allocation in deregulated power system operation

    E-Print Network [OSTI]

    Ding, Qifeng

    2005-02-17T23:59:59.000Z

    (OPF) algorithm to optimize the loss compensation if some transactions elect to purchase the loss service from the Independent System Operator (ISO) and accordingly the incurred losses are fairly allocated back to individual transactions. IEEE test... regulations have been causing the power industry to move rapidly toward the open transmission access, the unbundling of previously integrated services and the creation of regional transmission organizations (RTOs), Independent System Operators (ISOs) and so...

  5. High-power LEDs based on InGaAsP/InP heterostructures

    SciTech Connect (OSTI)

    Rakovics, V. [Hungarian Academy of Sciences, Institute of Technical Physics and Materials Science, Research Centre for Natural Sciences (Hungary); Imenkov, A. N.; Sherstnev, V. V.; Serebrennikova, O. Yu.; Il’inskaya, N. D.; Yakovlev, Yu. P., E-mail: Yak@iropt1.ioffe.ru [Russian Academy of Sciences, Ioffe Physical-Technical Institute (Russian Federation)

    2014-12-15T23:59:59.000Z

    High-power light-emitting diodes (LEDs) with mesa diameters of 100, 200, and 300 ?m are developed on the basis of InGaAsP/InP heterostructures. The mesas are close in shape to a truncated cone with a generatrix inclination angle of ?45° in the vicinity of the active region of the LED, with a ring etched around the mesa serving as a reflector. The emission spectra and directivity patterns of these LEDs are studied in a wide range of current densities and it is shown that radiative recombination is dominant to a current density of ?5000 A/cm{sup 2}, which makes these structures promising for the development of high-power LEDs. An emission power of ?14 mW is obtained in the continuous-wave mode (I = 0.2 A, ? = 1.1 ?m), and that of 77 mW, in the pulsed mode (I = 2 A, ? = 1.1 ?m), which corresponds to external quantum efficiencies of 6.2 and 3.4%, respectively.

  6. High power impulse magnetron sputtering and related discharges: scalable plasma sources for plasma-based ion implantation and deposition

    SciTech Connect (OSTI)

    Anders, Andre

    2009-09-01T23:59:59.000Z

    High power impulse magnetron sputtering (HIPIMS) and related self-sputtering techniques are reviewed from a viewpoint of plasma-based ion implantation and deposition (PBII&D). HIPIMS combines the classical, scalable sputtering technology with pulsed power, which is an elegant way of ionizing the sputtered atoms. Related approaches, such as sustained self-sputtering, are also considered. The resulting intense flux of ions to the substrate consists of a mixture of metal and gas ions when using a process gas, or of metal ions only when using `gasless? or pure self-sputtering. In many respects, processing with HIPIMS plasmas is similar to processing with filtered cathodic arc plasmas, though the former is easier to scale to large areas. Both ion implantation and etching (high bias voltage, without deposition) and thin film deposition (low bias, or bias of low duty cycle) have been demonstrated.

  7. Design of Power Efficient FPGA based Hardware Accelerators for Financial Applications

    E-Print Network [OSTI]

    Nannarelli, Alberto

    gorithms [1] with high energy efficiency. The case study is a Monte Carlo approach for pricing of European-based specific processor for European option pricing using Monte Carlo simu lations, and we compare its results, in terms of speed-up and energy savings, can be obtained by using FPGA-based accelerators

  8. Light-Powered Microbial Fuel Cell Offering Clean, Renewable Hydrogen-Based

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12electron 9 5Let us count

  9. An Integrated Power Pack of Dye-Sensitized Solar Cell and Li Battery Based on Double-Sided TiO2 Nanotube Arrays

    E-Print Network [OSTI]

    Wang, Zhong L.

    An Integrated Power Pack of Dye-Sensitized Solar Cell and Li Battery Based on Double-Sided TiO2 harvest and storage processes. This power pack incorporates a series-wound dye- sensitized solar cell, nanostructures have been widely used in energy harvesting devices, such as dye-sensitized solar cells (DSSCs

  10. Power Conservation Strategies for MEMS-based Storage Devices Ying Lin Scott A. Brandt Darrell D. E. Long Ethan L. Miller

    E-Print Network [OSTI]

    Miller, Ethan L.

    to reduce power consumption: ag- gressive spin-down, sequential request merging, and sub- sector accesses energy and reduce response time by about 20%. Transferring less data for small requests such as those strategies simultaneously the total power consumption of MEMS-based storage devices can be reduced by about

  11. FPGA Based Sinusoidal Pulse Width Modulated Waveform Generation for Solar (PV) Rural Home Power Inverter

    E-Print Network [OSTI]

    Singh, S N

    2010-01-01T23:59:59.000Z

    With the increasing concern about global environmental protection and energy demand due to rapid growth of population in developing countries and the diminishing trend of resources of conventional grid supply, the need to produce freely available pollution free natural energy such as solar/wind energy has been drawing increasing interest in every corner of the world. In an effort to utilize these energies effectively through Power converter, a great deal of research is being carried out by different researchers / scientist and engineers at different places in the world to meet the increasing demand of load. The study presents methodology to integrate solar (PV) energy (which is freely available in every corner of the world) with grid source and supplement the existing grid power in rural houses during its cut off or restricted supply period. In order to get consistency in supply a DG is also added as a standby source in the proposed integration of network. The software using novel Direct PWM modulation strate...

  12. Data base on dose reduction research projects for nuclear power plants. Volume 5

    SciTech Connect (OSTI)

    Khan, T.A.; Yu, C.K.; Roecklein, A.K. [Brookhaven National Lab., Upton, NY (United States)] [Brookhaven National Lab., Upton, NY (United States)

    1994-05-01T23:59:59.000Z

    This is the fifth volume in a series of reports that provide information on dose reduction research and health physics technology or nuclear power plants. The information is taken from two of several databases maintained by Brookhaven National Laboratory`s ALARA Center for the Nuclear Regulatory Commission. The research section of the report covers dose reduction projects that are in the experimental or developmental phase. It includes topics such as steam generator degradation, decontamination, robotics, improvements in reactor materials, and inspection techniques. The section on health physics technology discusses dose reduction efforts that are in place or in the process of being implemented at nuclear power plants. A total of 105 new or updated projects are described. All project abstracts from this report are available to nuclear industry professionals with access to a fax machine through the ACEFAX system or a computer with a modem and the proper communications software through the ACE system. Detailed descriptions of how to access all the databases electronically are in the appendices of the report.

  13. Ultrahigh-Power Micrometre-Sized Supercapacitors Based on Onion-Like Carbon

    SciTech Connect (OSTI)

    Pech, D.; Brunet, M.; Durou, H.; Huang, P.; Mochalin, V.; Gogotsi, Y.; Taberna, P. L.; Simon, P.

    2010-01-01T23:59:59.000Z

    Electrochemical capacitors, also called supercapacitors, store energy in two closely spaced layers with opposing charges, and are used to power hybrid electric vehicles, portable electronic equipment and other devices. By offering fast charging and discharging rates, and the ability to sustain millions of cycles, electrochemical capacitors bridge the gap between batteries, which offer high energy densities but are slow, and conventional electrolytic capacitors, which are fast but have low energy densities. Here, we demonstrate microsupercapacitors with powers per volume that are comparable to electrolytic capacitors, capacitances that are four orders of magnitude higher, and energies per volume that are an order of magnitude higher. We also measured discharge rates of up to 200 V s{sup ?1}, which is three orders of magnitude higher than conventional supercapacitors. The microsupercapacitors are produced by the electrophoretic deposition of a several-micrometre-thick layer of nanostructured carbon onions with diameters of 6–7 nm. Integration of these nanoparticles in a microdevice with a high surface-to-volume ratio, without the use of organic binders and polymer separators, improves performance because of the ease with which ions can access the active material. Increasing the energy density and discharge rates of supercapacitors will enable them to compete with batteries and conventional electrolytic capacitors in a number of applications.

  14. Advanced intelligent coordinated control of coal fired power plant based on fuzzy reasoning and auto-tuning

    SciTech Connect (OSTI)

    Li, S.Y.; Liu, H.B.; Cai, W.J.; Soh, Y.C.; Xie, L.H. [Shanghai Jiao Tong University, Shanghai (China)

    2004-07-01T23:59:59.000Z

    The load following operation of coal-fired boiler-turbine unit in power plants can lead to changes in operating points, and it results in nonlinear variations of the plant variables and parameters. As there exist strong couplings between the main steam pressure control loop and the power output control loop in the boiler-turbine unit with large time-delay and uncertainties, automatic coordinated control of the two loops is a very challenging problem. This paper presents a new coordinated control strategy (CCS) which is organized into two levels: a basic control level and a high supervision level. PID-type controllers are used in the basic level to perform basic control functions while the decoupling between two control loops can be realized in the high level. Moreover, PID-type controllers can be auto-tuned to achieve a better control performance in the whole operating range and to reject the unmeasurable disturbances. A special subclass of fuzzy inference systems, namely the Gaussian partition system with evenly spaced midpoints, is also proposed to auto-tune the PID controller in the main steam pressure loop based on the error signal and its first difference to overcome uncertainties caused by changing fuel calorific value, machine wear, contamination of the boiler heating surfaces and plant modeling errors, etc. The developed CCS has been implemented in a power plant in China, and satisfactory industrial operation results demonstrate that the proposed control strategy has enhanced the adaptability and robustness of the process.

  15. TVA- Green Power Providers

    Broader source: Energy.gov [DOE]

    Tennessee Valley Authority (TVA) and participating power distributors of TVA power offer a performance-based incentive program to homeowners and businesses for the installation of renewable...

  16. Impact of Advanced Turbine Systems on coal-based power plants

    SciTech Connect (OSTI)

    Bechtel, T.F.

    1993-12-31T23:59:59.000Z

    The advanced power-generation products currently under development in our program show great promise for ultimate commercial use. Four of these products are referred to in this paper: Integrated Gasification Combined Cycle (IGCC), Pressurized Fluidized Bed Combustion (PFBC), Externally Fired Combined Cycle (EFCC), and Integrated Gasification Fuel Cell (IGFC). Three of these products, IGCC, PFBC, and EFCC, rely on advanced gas turbines as a key enabling technology and the foundation for efficiencies in the range of 52 to 55 percent. DOE is funding the development of advanced gas turbines in the newly instituted Advanced Turbine Systems (ATS) Program, one of DOE`s highest priority natural gas initiatives. The turbines, which will have natural gas efficiencies of 60 percent, are being evaluated for coal gas compatibility as part of that program.

  17. Environmental externalities: Applying the concept to Asian coal-based power generation

    SciTech Connect (OSTI)

    Szpunar, C.B.; Gillette, J.L.

    1993-03-01T23:59:59.000Z

    This report examines the concept of environmental externality. It discusses various factors -- the atmospheric transformations, relationship of point-source emissions to ambient air quality, dose-response relationships, applicable cause-and-effect principles, and risk and valuation research -- that are considered by a number of state utilities when they apply the environmental externality concept to energy resource planning. It describes a methodology developed by Argonne National Laboratory for general use in resource planning, in combination with traditional methods that consider the cost of electricity production. Finally, it shows how the methodology can be applied in Indonesia, Thailand, and Taiwan to potential coal-fired power plant projects that will make use of clean coal technologies.

  18. Air pollution: Coal based power plants major culprit : HindustanTimes.com http://www.hindustantimes.com/news/5922_1646830,001500250000000... 1 of 2 3/10/2006 7:45 AM

    E-Print Network [OSTI]

    Singh, Ramesh P.

    Air pollution: Coal based power plants major culprit : HindustanTimes.com http 1 Front » Story Air pollution: Coal based power plants major culprit HT Correspondent Kanpur, March that coal based thermal power plants are the main source for air pollution. The fact came to the fore during

  19. On improving performance and conserving power in cluster-based web servers

    E-Print Network [OSTI]

    Vageesan, Gopinath

    2007-04-25T23:59:59.000Z

    . The proactive distribution depends on both online and offline analysis of the website log files, which capture user navigation patterns on the website. The prefetching scheme pre-fetches the web pages into the memory based on a confidence value of the web page...

  20. Cramer-Rao Bounds for Power Delay Profile Fingerprinting based Positioning

    E-Print Network [OSTI]

    Gesbert, David

    , SAP, Monaco Telecom. The research reported herein was also partially supported by the European FP7 projects WHERE2, CROWN and NEWCOM++. database [1] for fingerprints. In [2], authors provide deter- ministic. It is well known that at least 3 BSs are required for a TOA based localization system to uniquely identify

  1. Risk-based Maintenance Allocation and Scheduling for Bulk Electric Power Transmission System Equipment

    E-Print Network [OSTI]

    equipment, maintenance, reliability, risk, security, optimization 1.Introduction Maintenance of bulk Equipment Yong Jiang, Ming Ni, James D. McCalley, Tim Van Voorhis {jiangy for bulk transmission equipment that is based on the cumulative long-term risk caused by each piece

  2. Power Factor Reactive Power

    E-Print Network [OSTI]

    motor power: 117.7 V x 5.1 A = 600 W? = 0.6 kW? NOT the power measured by meter #12;Page 9 PSERC: displacement power factor: angle between voltage and current = 0 degrees pf = cos(0 degrees) = 1.0 true powerPage 1 PSERC Power Factor and Reactive Power Ward Jewell Wichita State University Power Systems

  3. Power/Performance Trade-offs of Small Batched LU Based Solvers on GPUs

    SciTech Connect (OSTI)

    Villa, Oreste; Fatica, Massimiliano; Gawande, Nitin A.; Tumeo, Antonino

    2013-08-26T23:59:59.000Z

    In this paper we propose and analyze a set of batched linear solvers for small matrices on Graphic Processing Units (GPUs), evaluating the various alternatives depending on the size of the systems to solve. We discuss three different solutions that operate with different level of parallelization and GPU features. The first, exploiting the CUBLAS library, manages matrices of size up to 32x32 and employs Warp level (one matrix, one Warp) parallelism and shared memory. The second works at Thread-block level parallelism (one matrix, one Thread-block), still exploiting shared memory but managing matrices up to 76x76. The third is Thread level parallel (one matrix, one thread) and can reach sizes up to 128x128, but it does not exploit shared memory and only relies on the high memory bandwidth of the GPU. The first and second solution only support partial pivoting, the third one easily supports partial and full pivoting, making it attractive to problems that require greater numerical stability. We analyze the trade-offs in terms of performance and power consumption as function of the size of the linear systems that are simultaneously solved. We execute the three implementations on a Tesla M2090 (Fermi) and on a Tesla K20 (Kepler).

  4. Thermoeconomic design optimization of a KRW-based IGCC power plant

    SciTech Connect (OSTI)

    Tsatsaronis, G.; Lin, L.; Pisa, J.; Tawfik, T. (Tennessee Technological Univ., Cookeville, TN (United States). Center for Electric Power)

    1991-11-01T23:59:59.000Z

    This report discussed the cost and efficiency optimization of an integrated gasification-combined-cycle (IGCC) power plant design and the effects of important design options and parameters. Advanced thermoeconomic techniques were used to evaluate and optimize a given IGCC concept which uses Illinois No. 6 bituminous coal, air-blown KRW coal gasifiers, a hot gas cleanup system, and GE MS7001F gas turbines. Three optimal design concepts are presented and discussed in the report. Two of the concepts are characterized by minimum cost of electricity at two different values of the steam high pressure. The third concept represents the thermodynamic optimum. This study identified several differences between the original design and the design of the optimized cases. Compared with the original concept, significant annual savings are achieved in the cost optimal cases. Comparisons were made between results obtained using both the old and the new performance data for the MS7001F gas turbine. This report discusses the effects of gasification temperature, steam high pressure, coal moisture, and various design options on the overall plant efficiency and cost of electricity. Cost sensitivity studies were conducted and recommendations for future studies were made.

  5. Thermoeconomic design optimization of a KRW-based IGCC power plant. Final report

    SciTech Connect (OSTI)

    Tsatsaronis, G.; Lin, L.; Pisa, J.; Tawfik, T. [Tennessee Technological Univ., Cookeville, TN (United States). Center for Electric Power

    1991-11-01T23:59:59.000Z

    This report discussed the cost and efficiency optimization of an integrated gasification-combined-cycle (IGCC) power plant design and the effects of important design options and parameters. Advanced thermoeconomic techniques were used to evaluate and optimize a given IGCC concept which uses Illinois No. 6 bituminous coal, air-blown KRW coal gasifiers, a hot gas cleanup system, and GE MS7001F gas turbines. Three optimal design concepts are presented and discussed in the report. Two of the concepts are characterized by minimum cost of electricity at two different values of the steam high pressure. The third concept represents the thermodynamic optimum. This study identified several differences between the original design and the design of the optimized cases. Compared with the original concept, significant annual savings are achieved in the cost optimal cases. Comparisons were made between results obtained using both the old and the new performance data for the MS7001F gas turbine. This report discusses the effects of gasification temperature, steam high pressure, coal moisture, and various design options on the overall plant efficiency and cost of electricity. Cost sensitivity studies were conducted and recommendations for future studies were made.

  6. Computer–Based Procedures for Nuclear Power Plant Field Workers: Preliminary Results from Two Evaluation Studies

    SciTech Connect (OSTI)

    Katya L Le Blanc; Johanna H Oxstrand

    2013-10-01T23:59:59.000Z

    The Idaho National Laboratory and participants from the U.S. nuclear industry are collaborating on a research effort aimed to augment the existing guidance on computer-based procedure (CBP) design with specific guidance on how to design CBP user interfaces such that they support procedure execution in ways that exceed the capabilities of paper-based procedures (PBPs) without introducing new errors. Researchers are employing an iterative process where the human factors issues and interface design principles related to CBP usage are systematically addressed and evaluated in realistic settings. This paper describes the process of developing a CBP prototype and the two studies conducted to evaluate the prototype. The results indicate that CBPs may improve performance by reducing errors, but may increase the time it takes to complete procedural tasks.

  7. Breakout Session: Solar as a Base Load Power Source | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny: Theof Energy Future of CSP: Challenges and OpportunitiesPitch foras a Base

  8. Auxiliary feedwater system risk-based inspection guide for the Point Beach nuclear power plant

    SciTech Connect (OSTI)

    Lloyd, R C; Moffitt, N E; Gore, B F; Vo, T V; Vehec, T A [Pacific Northwest Lab., Richland, WA (United States)

    1993-02-01T23:59:59.000Z

    In a study sponsored by the US Nuclear Regulatory Commission (NRC), Pacific Northwest Laboratory has developed and applied a methodology for deriving plant-specific risk-based inspection guidance for the auxiliary feedwater (AFW) system at pressurized water reactors that have not undergone probabilistic risk assessment (PRA). This methodology uses existing PRA results and plant operating experience information. Existing PRA-based inspection guidance information recently developed for the NRC for various plants was used to identify generic component failure modes. This information was then combined with plant-specific and industry-wide component information and failure data to identify failure modes and failure mechanisms for the AFW system at the selected plants. Point Beach was selected as one of a series of plants for study. The product of this effort is a prioritized listing of AFW failures which have occurred at the plant and at other PWRS. This listing is intended for use by NRC inspectors in the preparation of inspection plans addressing AFW risk-important components at the Point Beach plant.

  9. Auxiliary feedwater system risk-based inspection guide for the Ginna Nuclear Power Plant

    SciTech Connect (OSTI)

    Pugh, R.; Gore, B.F.; Vo, T.V.; Moffitt, N.E. (Pacific Northwest Lab., Richland, WA (United States))

    1991-09-01T23:59:59.000Z

    In a study sponsored by the US Nuclear Regulatory Commission (NRC), Pacific Northwest Laboratory has developed and applied a methodology for deriving plant-specific risk-based inspection guidance for the auxiliary feedwater (AFW) system at pressurized water reactors that have not undergone probabilistic risk assessment (PRA). This methodology uses existing PRA results and plant operating experience information. Existing PRA-based inspection guidance information recently developed for the NRC for various plants was used to identify generic component failure modes. This information was then combined with plant-specific and industry-wide component information and failure data to identify failure modes and failure mechanisms for the AFW system at the selected plants. Ginna was selected as the eighth plant for study. The product of this effort is a prioritized listing of AFW failures which have occurred at the plant and at other PWRs. This listing is intended for use by NRC inspectors in the preparation of inspection plans addressing AFW risk-important components at the Ginna plant. 23 refs., 1 fig., 1 tab.

  10. Selection of higher eigenmode amplitude based on dissipated power and virial contrast in bimodal atomic force microscopy

    SciTech Connect (OSTI)

    Diaz, Alfredo J.; Eslami, Babak; López-Guerra, Enrique A.; Solares, Santiago D., E-mail: ssolares@gwu.edu [Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742 (United States)

    2014-09-14T23:59:59.000Z

    This paper explores the effect of the amplitude ratio of the higher to the fundamental eigenmode in bimodal atomic force microscopy (AFM) on the phase contrast and the dissipated power contrast of the higher eigenmode. We explore the optimization of the amplitude ratio in order to maximize the type of contrast that is most relevant to the particular study. Specifically, we show that the trends in the contrast range behave differently for different quantities, especially the dissipated power and the phase, with the former being more meaningful than the latter (a similar analysis can be carried out using the virial, for which we also provide a brief example). Our work is based on numerical simulations using two different conservative-dissipative tip-sample models, including the standard linear solid and the combination of a dissipation coefficient with a conservative model, as well as experimental images of thin film Nafion{sup ®} proton exchange polymers. We focus on the original bimodal AFM method, where the higher eigenmode is driven with constant amplitude and frequency (i.e., in “open loop”).

  11. Combustion systems and power plants incorporating parallel carbon dioxide capture and sweep-based membrane separation units to remove carbon dioxide from combustion gases

    DOE Patents [OSTI]

    Wijmans, Johannes G. (Menlo Park, CA); Merkel, Timothy C (Menlo Park, CA); Baker, Richard W. (Palo Alto, CA)

    2011-10-11T23:59:59.000Z

    Disclosed herein are combustion systems and power plants that incorporate sweep-based membrane separation units to remove carbon dioxide from combustion gases. In its most basic embodiment, the invention is a combustion system that includes three discrete units: a combustion unit, a carbon dioxide capture unit, and a sweep-based membrane separation unit. In a preferred embodiment, the invention is a power plant including a combustion unit, a power generation system, a carbon dioxide capture unit, and a sweep-based membrane separation unit. In both of these embodiments, the carbon dioxide capture unit and the sweep-based membrane separation unit are configured to be operated in parallel, by which we mean that each unit is adapted to receive exhaust gases from the combustion unit without such gases first passing through the other unit.

  12. Electric power grid control using a market-based resource allocation system

    DOE Patents [OSTI]

    Chassin, David P

    2014-01-28T23:59:59.000Z

    Disclosed herein are representative embodiments of methods, apparatus, and systems for distributing a resource (such as electricity) using a resource allocation system. In one exemplary embodiment, a plurality of requests for electricity are received from a plurality of end-use consumers. The requests indicate a requested quantity of electricity and a consumer-requested index value indicative of a maximum price a respective end-use consumer will pay for the requested quantity of electricity. A plurality of offers for supplying electricity are received from a plurality of resource suppliers. The offers indicate an offered quantity of electricity and a supplier-requested index value indicative of a minimum price for which a respective supplier will produce the offered quantity of electricity. A dispatched index value is computed at which electricity is to be supplied based at least in part on the consumer-requested index values and the supplier-requested index values.

  13. Simulation-based biagnostics and control for nuclar power plants. Progress report, April 15, 1992--April 14, 1993

    SciTech Connect (OSTI)

    Lee, J.C.

    1993-01-01T23:59:59.000Z

    Advanced simulation-based diagnostics and control guidance systems for the identification and management of off-normal transient events in nuclear power plants is currently under investigation. To date a great deal of progress has been made in effectively and efficiently combining information obtained through fuzzy pattern recognition and macroscopic mass and energy inventory analysis for use in multiple failure diagnostics. Work has also begun on the unique problem of diagnostics and surveillance methodologies for advanced passively-safe reactors systems utilizing both statistical and fuzzy information. Plans are also being formulated for the development of deterministic optimal control algorithms combined with Monte Carlo incremental learning algorithms to be used for the flexible and efficient control of reactor transients.

  14. Submersion Criticality Safety Analysis of Tungsten-Based Fuel for Nuclear Power and Propulsion Applications

    SciTech Connect (OSTI)

    A.E. Craft; R. C. O'Brien; S. D. Howe; J. C. King

    2014-07-01T23:59:59.000Z

    The Center for Space Nuclear Research (CSNR) is developing tungsten-encapsulated fuels for space nuclear applications. Aims to develop NTP fuels that are; Affordable Low impact on production and testing environment Producible on a large scale over suitable time period Higher-performance compared to previous graphite NTP fuel elements Space nuclear reactors remain subcritical before and during launch, and do not go critical until required by its mission. A properly designed reactor will remain subcritical in any launch abort scenario, where the reactor falls back to Earth and becomes submerged in terrestrial material. Submersion increases neutron reflection and thermalizes the neutrons, which typically increases the reactivity of the core. This effect is usually very significant for fast-spectrum reactors. This research provided a submersion criticality safety analysis for a representative tungsten/uranium oxide fueled reactor. Determine the submersion behavior of a reactor fueled by tungsten-based fuel. Considered fuel compositions with varying: Rhenium content (wt% rhenium in tungsten) Fuel loading fractions (UO2 vol%)

  15. Light Water Reactor Sustainability Program: Computer-based procedure for field activities: results from three evaluations at nuclear power plants

    SciTech Connect (OSTI)

    Oxstrand, Johanna [Idaho National Laboratory; Bly, Aaron [Idaho National Laboratory; LeBlanc, Katya [Idaho National Laboratory

    2014-09-01T23:59:59.000Z

    Nearly all activities that involve human interaction with the systems of a nuclear power plant are guided by procedures. The paper-based procedures (PBPs) currently used by industry have a demonstrated history of ensuring safety; however, improving procedure use could yield tremendous savings in increased efficiency and safety. One potential way to improve procedure-based activities is through the use of computer-based procedures (CBPs). Computer-based procedures provide the opportunity to incorporate context driven job aids, such as drawings, photos, just-in-time training, etc into CBP system. One obvious advantage of this capability is reducing the time spent tracking down the applicable documentation. Additionally, human performance tools can be integrated in the CBP system in such way that helps the worker focus on the task rather than the tools. Some tools can be completely incorporated into the CBP system, such as pre-job briefs, placekeeping, correct component verification, and peer checks. Other tools can be partly integrated in a fashion that reduces the time and labor required, such as concurrent and independent verification. Another benefit of CBPs compared to PBPs is dynamic procedure presentation. PBPs are static documents which limits the degree to which the information presented can be tailored to the task and conditions when the procedure is executed. The CBP system could be configured to display only the relevant steps based on operating mode, plant status, and the task at hand. A dynamic presentation of the procedure (also known as context-sensitive procedures) will guide the user down the path of relevant steps based on the current conditions. This feature will reduce the user’s workload and inherently reduce the risk of incorrectly marking a step as not applicable and the risk of incorrectly performing a step that should be marked as not applicable. As part of the Department of Energy’s (DOE) Light Water Reactors Sustainability Program, researchers at Idaho National Laboratory (INL) along with partners from the nuclear industry have been investigating the design requirements for computer-based work instructions (including operations procedures, work orders, maintenance procedures, etc.) to increase efficiency, safety, and cost competitiveness of existing light water reactors.

  16. Thermionic power generation. January 1970-December 1980 (citations from the Engineering Index Data Base). Report for January 1970-December 1980

    SciTech Connect (OSTI)

    Not Available

    1980-12-01T23:59:59.000Z

    Research on thermionic power generation, power plant design, converter design, and basic research on thermionic materials are cited in the bibliography. Spacecraft applications are also included. (Contains 138 citations, fully indexed and including a table of contents.)

  17. High power single-crystal fiber CW 946 nm laser and blue generation based on Rubidium-doped PPKTP

    E-Print Network [OSTI]

    Boyer, Edmond

    , T. Kozaki, T. Yanamoto, S. Nagahama, and T. Mukai, "High-Power Pure Blue InGaN Laser Diodes there is substantial absorption in KTP which leads to temporal instabilities at highest power levels, but stable output

  18. Assessment of the Flue Gas Recycle Strategies on Oxy-Coal Power Plants using an Exergy-based Methodology

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Assessment of the Flue Gas Recycle Strategies on Oxy- Coal Power Plants using an Exergy to be competitive with post-combustion for carbon capture on coal-fired power plants. In order to achieve is produced from coal (IEA 2012b), the development of CO2 capture technology on coal-fired power plants

  19. Reuse of Treated Internal or External Wastewaters in the Cooling Systems of Coal-Based Thermoelectric Power Plants

    SciTech Connect (OSTI)

    Radisav Vidic; David Dzombak; Ming-Kai Hsieh; Heng Li; Shih-Hsiang Chien; Yinghua Feng; Indranil Chowdhury; Jason Monnell

    2009-06-30T23:59:59.000Z

    This study evaluated the feasibility of using three impaired waters - secondary treated municipal wastewater, passively treated abandoned mine drainage (AMD), and effluent from ash sedimentation ponds at power plants - for use as makeup water in recirculating cooling water systems at thermoelectric power plants. The evaluation included assessment of water availability based on proximity and relevant regulations as well as feasibility of managing cooling water quality with traditional chemical management schemes. Options for chemical treatment to prevent corrosion, scaling, and biofouling were identified through review of current practices, and were tested at bench and pilot-scale. Secondary treated wastewater is the most widely available impaired water that can serve as a reliable source of cooling water makeup. There are no federal regulations specifically related to impaired water reuse but a number of states have introduced regulations with primary focus on water aerosol 'drift' emitted from cooling towers, which has the potential to contain elevated concentrations of chemicals and microorganisms and may pose health risk to the public. It was determined that corrosion, scaling, and biofouling can be controlled adequately in cooling systems using secondary treated municipal wastewater at 4-6 cycles of concentration. The high concentration of dissolved solids in treated AMD rendered difficulties in scaling inhibition and requires more comprehensive pretreatment and scaling controls. Addition of appropriate chemicals can adequately control corrosion, scaling and biological growth in ash transport water, which typically has the best water quality among the three waters evaluated in this study. The high TDS in the blowdown from pilot-scale testing units with both passively treated mine drainage and secondary treated municipal wastewater and the high sulfate concentration in the mine drainage blowdown water were identified as the main challenges for blowdown disposal. Membrane treatment (nanofiltration or reverse osmosis) can be employed to reduce TDS and sulfate concentrations to acceptable levels for reuse of the blowdown in the cooling systems as makeup water.

  20. Real-time State Estimation on Micro-grids Ying Hu, Anthony Kuh, Aleksandar Kavcic

    E-Print Network [OSTI]

    Kavcic, Aleksandar

    . In addition, the proposed graphical model can integrate new models for solar/wind cor- relation that will help been made on the individual feeder circuit estimating the customer load characteristics. One reason for this lack of study is that there is hardly any real-time load measure- ments for individual customers

  1. WindTurbineGenerator Introduction of the Renewable Micro-Grid Test-Bed

    E-Print Network [OSTI]

    Johnson, Eric E.

    Simulator Wind Turbine: PMSM, 3kW, 8.3A Wind Generator: PMSM, 3kW, 8.3A 3 AC/DC Converter & DC/AC Inverter Wind Turbine: Torque or Speed Control Wind Generator: PQ Control Cubicle #4: Energy Storage Generator #1 3kW, 8.3A Wind Turbine #1 3kW, 8.3A Wind Turbine #2 3kW Wind Generator #2 3kW RS232

  2. Micro-grid State Estimation Using Belief Propagation on Factor Graphs

    E-Print Network [OSTI]

    Kavcic, Aleksandar

    to environmental and energy sustainability concerns, variable pricing, sophisticated communication and sensing energy resources and enable a future self-dispatch and self- healing grid. This would first require, renewable energy generation become more prevalent (with intermittent sources such as wind and solar) due

  3. Towards risk-based management of critical infrastructures : enabling insights and analysis methodologies from a focused study of the bulk power grid.

    SciTech Connect (OSTI)

    Richardson, Bryan T.; LaViolette, Randall A.; Cook, Benjamin Koger

    2008-02-01T23:59:59.000Z

    This report summarizes research on a holistic analysis framework to assess and manage risks in complex infrastructures, with a specific focus on the bulk electric power grid (grid). A comprehensive model of the grid is described that can approximate the coupled dynamics of its physical, control, and market components. New realism is achieved in a power simulator extended to include relevant control features such as relays. The simulator was applied to understand failure mechanisms in the grid. Results suggest that the implementation of simple controls might significantly alter the distribution of cascade failures in power systems. The absence of cascade failures in our results raises questions about the underlying failure mechanisms responsible for widespread outages, and specifically whether these outages are due to a system effect or large-scale component degradation. Finally, a new agent-based market model for bilateral trades in the short-term bulk power market is presented and compared against industry observations.

  4. Environmental externalities: An ASEAN application to coal-based power generation. [Association of South East Asian Nations (ASEAN)

    SciTech Connect (OSTI)

    Szpunar, C.B.; Gillette, J.L.

    1992-06-01T23:59:59.000Z

    Significant benefits to human health that result from emissions control programs may justify the costs of pollution control policies. Many scientists, economists, risk analysts, and policymakers believe that comparisons of the benefits with the costs of pollution control demonstrate that the US stationary source, air emissions control program is justified. This justification is based upon pronounced benefits to human health, especially from controlling suspended particulates and sulfur compounds. Market decisions are usually made on the basis of a consideration of traditional costs such as capital, operating and maintenance, fuel costs, and fixed charges. Social costs, which could be significant, are not incorporated explicitly into such decisions. These social costs could result in a net reduction in the welfare of individuals, and of society as a whole. Because these social costs and their effects are not represented in the price of energy, individual have no way to explicitly value them; hence, they remain unaccounted for in market decisions. By accounting for external costs, the selection of energy sources and production of energy products can lead to and equilibrium, where the total cost of energy and energy products, together with resulting social costs, can be brought to an economic minimum. The concept of an air emissions control program is of interest to the ASEAN countries (Brunei, Indonesia, Malaysia, the Philippines, Singapore, and Thailand) and their governments, especially if such a program could be justified in cost-benefit terms and shown to be directly applicable to ASEAN conditions. It is the intent of the effort described herein to demonstrate that technical options are available to control emissions from coal-based, electric power plants and that that costs of these options may be justified in cost-benefit terms.

  5. Polarity dependence of the electrical characteristics of Ag reflectors for high-power GaN-based light emitting diodes

    SciTech Connect (OSTI)

    Park, Jae-Seong; Seong, Tae-Yeon, E-mail: tyseong@korea.ac.kr [Department of Materials Science and Engineering, Korea University, Seoul 136-713 (Korea, Republic of); Han, Jaecheon [Department of LED Business, Chip Development Group, LG Innotek, Paju 413-901 (Korea, Republic of); Ha, Jun-Seok [School of Applied Chemical Engineering, Chonnam National University, Gwangju 500-757 (Korea, Republic of)

    2014-04-28T23:59:59.000Z

    We report on the polarity dependence of the electrical properties of Ag reflectors for high-power GaN-based light-emitting diodes. The (0001) c-plane samples become ohmic after annealing in air. However, the (11–22) semi-polar samples are non-ohmic after annealing, although the 300?°C-annealed sample shows the lowest contact resistivity. The X-ray photoemission spectroscopy (XPS) results show that the Ga 2p core level for the c-plane samples experiences larger shift toward the valence band than that for the semi-polar samples. The XPS depth profile results show that unlike the c-plane samples, the semi-polar samples contain some amounts of oxygen at the Ag/GaN interface regions. The outdiffusion of Ga atoms is far more significant in the c-plane samples than in the semi-polar samples, whereas the outdiffusion of N atoms is relatively less significant in the c-plane samples. On the basis of the electrical and XPS results, the polarity dependence of the electrical properties is described and discussed.

  6. A Web-Based Platform for Experimental Investigation of Electric Power Auctions Ray D. Zimmerman Robert J. Thomas Deqiang Gan Carlos Murillo-Snchez

    E-Print Network [OSTI]

    -based character. Keywords: electric power auction, competitive electricity market, deregulation 1 Introduction on this path and to refer to the undertaking as deregulation would be a mistake. In 1990 the United Kingdom the experience in the UK, the historical experience with deregulation of other industries has been an unqualified

  7. Design & development fo a 20-MW flywheel-based frequency regulation power plant : a study for the DOE Energy Storage Systems program.

    SciTech Connect (OSTI)

    Rounds, Robert (Beacon Power, Tyngsboro, MA); Peek, Georgianne Huff

    2009-01-01T23:59:59.000Z

    This report describes the successful efforts of Beacon Power to design and develop a 20-MW frequency regulation power plant based solely on flywheels. Beacon's Smart Matrix (Flywheel) Systems regulation power plant, unlike coal or natural gas generators, will not burn fossil fuel or directly produce particulates or other air emissions and will have the ability to ramp up or down in a matter of seconds. The report describes how data from the scaled Beacon system, deployed in California and New York, proved that the flywheel-based systems provided faster responding regulation services in terms of cost-performance and environmental impact. Included in the report is a description of Beacon's design package for a generic, multi-MW flywheel-based regulation power plant that allows accurate bids from a design/build contractor and Beacon's recommendations for site requirements that would ensure the fastest possible construction. The paper concludes with a statement about Beacon's plans for a lower cost, modular-style substation based on the 20-MW design.

  8. Department of Mechanical Engineering Presents: "Towards Optimal Investment, Planning and Control of Microgrids"

    E-Print Network [OSTI]

    Keaveny, Tony

    on the optimal investment, planning, and control of distributed micro-grids. A micro-grid is characterized by its generation sources (renewables and non-renewables), storage capacity, internal demand and sell back to grid of microgrids quite challenging problems. From the power grid point of view, microgrids are resource nodes

  9. IEEE TRANSACTIONS ON SMART GRID, VOL. 4, NO. 3, SEPTEMBER 2013 1297 Decentralized Voltage Control to Minimize

    E-Print Network [OSTI]

    Peng, Huei

    a decentralized voltage control algorithm that minimizes power losses for micro- grids. Its optimality and plug sometimes are installed in rural areas away from the main electric grid, forming micro- grids [1 storage systems and provide vehicle-to-grid (V2G) functions using the on-board generators [8

  10. Power Plant Power Plant

    E-Print Network [OSTI]

    Tingley, Joseph V.

    Basin Center for Geothermal Energy at University of Nevada, Reno (UNR) 2 Nevada Geodetic LaboratoryStillwater Power Plant Wabuska Power Plant Casa Diablo Power Plant Glass Mountain Geothermal Area Lassen Geothermal Area Coso Hot Springs Power Plants Lake City Geothermal Area Thermo Geothermal Area

  11. The development of low cost LiFePO4-based high power lithium-ion batteries

    E-Print Network [OSTI]

    Shim, Joongpyo; Sierra, Azucena; Striebel, Kathryn A.

    2003-01-01T23:59:59.000Z

    HIGH POWER LITHIUM-ION BATTERIES Joongpyo Shim, Azucenaof rechargeable lithium batteries for application in hybridin consumer-size lithium batteries, such as the synthetic

  12. Cluster-Based Semi-Asynchronous Power-Saving Protocols for Multi-hop Ad Hoc Networks

    E-Print Network [OSTI]

    Tseng, Yu-Chee

    applied to a multi-hop MANET. I. INTRODUCTION Since most mobile devices do not have plug-in power, battery

  13. Reliable, Efficient and Cost-Effective Electric Power Converter for Small Wind Turbines Based on AC-link Technology

    SciTech Connect (OSTI)

    Darren Hammell; Mark Holveck; DOE Project Officer - Keith Bennett

    2006-08-01T23:59:59.000Z

    Grid-tied inverter power electronics have been an Achilles heel of the small wind industry, providing opportunity for new technologies to provide lower costs, greater efficiency, and improved reliability. The small wind turbine market is also moving towards the 50-100kW size range. The unique AC-link power conversion technology provides efficiency, reliability, and power quality advantages over existing technologies, and Princeton Power will adapt prototype designs used for industrial asynchronous motor control to a 50kW small wind turbine design.

  14. High Level Power Estimation based on a functional analysis for Embedded DSP Johann LAURENT Nathalie JULIEN Eric SENN Eric MARTIN

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of the cooling system and batteries. The power optimization can act on these different parameters-known that algorithm transformations are more efficient than technologic optimizations [1]; furthermore caches and possibly superscalar architecture. All recent works on power estimation for DSP operate

  15. FACTSHEET: Next Generation Power Electronics Manufacturing Innovation...

    Broader source: Energy.gov (indexed) [DOE]

    Power Electronics Across Every Industry In the last century, silicon semiconductor-based power electronics - which control or convert electrical energy into usable power -...

  16. Application of bounding spectra to seismic design of piping based on the performance of above ground piping in power plants subjected to strong motion earthquakes

    SciTech Connect (OSTI)

    Stevenson, J.D. [Stevenson and Associates, Cleveland, OH (United States)

    1995-02-01T23:59:59.000Z

    This report extends the potential application of Bounding Spectra evaluation procedures, developed as part of the A-46 Unresolved Safety Issue applicable to seismic verification of in-situ electrical and mechanical equipment, to in-situ safety related piping in nuclear power plants. The report presents a summary of earthquake experience data which define the behavior of typical U.S. power plant piping subject to strong motion earthquakes. The report defines those piping system caveats which would assure the seismic adequacy of the piping systems which meet those caveats and whose seismic demand are within the bounding spectra input. Based on the observed behavior of piping in strong motion earthquakes, the report describes the capabilities of the piping system to carry seismic loads as a function of the type of connection (i.e. threaded versus welded). This report also discusses in some detail the basic causes and mechanisms for earthquake damages and failures to power plant piping systems.

  17. Wavelet-based multi-resolution analysis and artificial neural networks for forecasting temperature and thermal power consumption

    E-Print Network [OSTI]

    Boyer, Edmond

    and thermal power consumption Julien Eynard, Stéphane Grieu1 and Monique Polit ELIAUS Lab., University. The number of past sequences to take into account and the chosen time step were also major concerns

  18. Operating Experience and Test Results From An Ammonia-Based Dry/Wet Cooling System For Electric Power Stations 

    E-Print Network [OSTI]

    Allemann, R. T.; Werry, E. V.; Fricke, H. D.; Price, R. E.; Bartz, J. A.

    1982-01-01T23:59:59.000Z

    Preliminary results of testing the Advanced Concept Test Facility, a 15 MW(e) heat rejection demonstration at the Kern Power Plant of PG&E* , Bakersfield, California, are summarized. The system operates stable and essentially as expected...

  19. Using risk-based regulations for licensing nuclear power plants : case study of gas-cooled fast reactor

    E-Print Network [OSTI]

    Jourdan, Grégoire

    2005-01-01T23:59:59.000Z

    The strategy adopted for national energy supply is one of the most important policy choice for the US. Although it has been dismissed in the past decades, nuclear power today has key assets when facing concerns on energy ...

  20. Design, characterization, and modeling of GaN based HFETs for millimeter wave and microwave power amplifier applications

    E-Print Network [OSTI]

    Conway, Adam M.

    2006-01-01T23:59:59.000Z

    power GaN electronics thermally resistive substrates,” IEEE400um SiC (Si, GaN, Sapphire, Diamond) substrate 5um Au 50umfree standing GaN or SiC substrates). At room temperature,

  1. ELECTRIFICATION OF ISOLATED AREAS BY INTERCONNECTING DIFFERENT RENEWABLE SOURCES OF ENERGY: A SUSTANAIBLE APPROACH

    E-Print Network [OSTI]

    of a methodology for rural electrification by micro-grids based upon different renewable resources. > Application to absorb innovations such as rural electrification by isolated micro grid Sustainable approach The successELECTRIFICATION OF ISOLATED AREAS BY INTERCONNECTING DIFFERENT RENEWABLE SOURCES OF ENERGY

  2. Maintenance Duration Estimate for a DEMO Fusion Power Plant, based on the EFDA WP12 pre-conceptual studies

    E-Print Network [OSTI]

    Crofts, O

    2014-01-01T23:59:59.000Z

    The erosion and high neutron flux in a fusion power plant results in the need for frequent remote replacement of the plasma facing components. This is a complex and time consuming remote handling operation and its duration directly affects the availability and therefore the commercial viability of the power plant. A tool is needed to allow the maintenance duration to be determined so that developments in component design can be assessed in terms of their effect on the maintenance duration. This allows the correct balance to be drawn between component cost and performance on the one hand and the remote handling cost and plant availability on the other.

  3. Thermodynamic Modeling and Analysis of the Ratio of Heat to Power Based on a Conceptual CHP System 

    E-Print Network [OSTI]

    Liu, Z.; Li, X.; Liu, Z.

    2006-01-01T23:59:59.000Z

    .P. Strakey, S.C. Sighal. U.S. distributed generation fuel cell program [J]. Journal of Power Source, 131(2004): 79-85 [14] J.L. Silveira, C.E. Tuna. Thermo-economic analysis method for optimization of combined heat and power systems Part I [J]. Progress..., Simulation 1. INTRODUCTION Solid oxide fuel cells (SOFCS) are electrochemical reactors currently under development for applications in the field of energy conversion [1]. As the fuels are concerned, pure hydrogen and methane are generally being...

  4. Thermodynamic Modeling and Analysis of the Ratio of Heat to Power Based on a Conceptual CHP System

    E-Print Network [OSTI]

    Liu, Z.; Li, X.; Liu, Z.

    2006-01-01T23:59:59.000Z

    .P. Strakey, S.C. Sighal. U.S. distributed generation fuel cell program [J]. Journal of Power Source, 131(2004): 79-85 [14] J.L. Silveira, C.E. Tuna. Thermo-economic analysis method for optimization of combined heat and power systems Part I [J]. Progress..., Simulation 1. INTRODUCTION Solid oxide fuel cells (SOFCS) are electrochemical reactors currently under development for applications in the field of energy conversion [1]. As the fuels are concerned, pure hydrogen and methane are generally being...

  5. Hybrid Electric Vehicle Power Management Solutions Based on Isolated and Non-Isolated Configurations of MMCCC Converter

    SciTech Connect (OSTI)

    Khan, Faisal H [ORNL; Tolbert, Leon M [ORNL; Webb, William E [Oak Ridge National Laboratory (ORNL)

    2009-01-01T23:59:59.000Z

    This paper presents the various configurations of a multilevel modular capacitor-clamped converter (MMCCC), and it reveals many useful and new formations of the original MMCCC for transferring power in either an isolated or nonisolated manner. The various features of the original MMCCC circuit are best suited for a multibus system in future plug-in hybrid or fuel-cell-powered vehicles' drive train. The original MMCCC is capable of bidirectional power transfer using multilevel modular structure with capacitor-clamped topology. It has a nonisolated structure, and it offers very high efficiency even at partial loads. This circuit was modified to integrate single or multiple high-frequency transformers by using the intermediate voltage nodes of the converter. On the other hand, a special formation of the MMCCC can exhibit dc outputs offering limited isolation without using any isolation transformer. This modified version can produce a high conversion ratio from a limited number of components and has several useful applications in providing power to multiple low-voltage loads in a hybrid or electric automobile. This paper will investigate the origin of generating ac outputs from the MMCCC and shows how the transformer-free version can be modified to create limited isolation from the circuit. In addition, this paper will compare various modified forms of the MMCCC topology with existing dc-dc converter circuits from compactness and component utilization perspectives.

  6. Work In Progress: Conquest--Combining Battery-Backed RAM and Threshold-Based Storage Scheme to Conserve Power

    E-Print Network [OSTI]

    Wang, Andy

    accesses, which account for 8% of the power usage for laptops, 20% for web servers, and up to 70% for disk, Computer Science Department, UCLA, popek@cs.ucla.edu Energy conservation has become a pressing re- search performance and more features. Due to rising energy costs, the server market is also becoming sensitive

  7. Increase in NOx Emissions from Indian Thermal Power Plants during 1996-2010: Unit-Based Inventories and Multisatellite Observations

    E-Print Network [OSTI]

    Jacob, Daniel J.

    and Multisatellite Observations Zifeng Lu* and David G. Streets Decision and Information Sciences Division, Argonne National Laboratory, Argonne, Illinois, United States *S Supporting Information ABSTRACT: Driven by rapid economic development and growing electricity demand, NOx emissions (E) from the power sector in India have

  8. Abstract--This paper proposes an effective VAR planning based on reactive power margin for the enhancement of dynamic

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    , distributed generation (DG), D-STATCOM, reactive power margin, wind turbine. I. INTRODUCTION URRENTLY for the enhancement of dynamic voltage stability in distribution networks with distributed wind generation results showing the effects of composite load on voltage dynamics in the distribution network through

  9. Abstract--This paper proposes a stochastic wind power model based on an autoregressive integrated moving average (ARIMA)

    E-Print Network [OSTI]

    Bak-Jensen, Birgitte

    of one year from the Nysted offshore wind farm in Denmark. The proposed limited-ARIMA (LARIMA) model be applied to planning of future wind farms in the power system. However, both approaches entail wind speed measurements and an accurate wind farm model, which is usually unavailable. The accurate wind farm model

  10. US Department of Energy`s high-temperature and high-pressure particulate cleanup for advanced coal-based power systems

    SciTech Connect (OSTI)

    Dennis, R.A.

    1997-05-01T23:59:59.000Z

    The availability of reliable, low-cost electricity is a cornerstone for the United States` ability to compete in the world market. The Department of Energy (DOE) projects the total consumption of electricity in the US to rise from 2.7 trillion kilowatt-hours in 1990 to 3.5 trillion in 2010. Although energy sources are diversifying, fossil fuel still produces 90 percent of the nation`s energy. Coal is our most abundant fossil fuel resource and the source of 56 percent of our electricity. It has been the fuel of choice because of its availability and low cost. A new generation of high-efficiency power systems has made it possible to continue the use of coal while still protecting the environment. Such power systems greatly reduce the pollutants associated with cola-fired plants built before the 1970s. To realize this high efficiency and superior environmental performance, advanced coal-based power systems will require gas stream cleanup under high-temperature and high-pressure (HTHP) process conditions. Presented in this paper are the HTHP particulate capture requirements for the Integrated Gasification Combined Cycle (IGCC) and Pressurized Fluidized-Bed Combustion (PFBC) power systems, the HTHP particulate cleanup systems being implemented in the PFBC and IGCC Clean Coal Technology (CCT) Projects, and the currently available particulate capture performance results.

  11. Multimegawatt space power reactors

    SciTech Connect (OSTI)

    Dearien, J.A.; Whitbeck, J.F.

    1989-01-01T23:59:59.000Z

    In response to the need of the Strategic Defense Initiative (SDI) and long range space exploration and extra-terrestrial basing by the National Air and Space Administration (NASA), concepts for nuclear power systems in the multi-megawatt levels are being designed and evaluated. The requirements for these power systems are being driven primarily by the need to minimize weight and maximize safety and reliability. This paper will discuss the present requirements for space based advanced power systems, technological issues associated with the development of these advanced nuclear power systems, and some of the concepts proposed for generating large amounts of power in space. 31 figs.

  12. Development of a Web-based Emissions Reduction Calculator for Green Power Purchases from Texas Wind Energy Providers

    E-Print Network [OSTI]

    Liu, Z.; Baltazar-Cervantes, J. C.; Gilman, D.; Haberl, J.; Culp, C.

    2005-01-01T23:59:59.000Z

    that have been developed to calculate the emissions reductions from electricity provided by wind energy providers in the Texas ERCOT region, including an analysis of actual hourly wind power generated from a wind turbine in Randall County, Texas... development here. The capacity of installed wind turbines totals 1,407 MW as of April 2005 and the planned capacity for new projects 4 rises to 3,700 1 In the 2003 Texas State legislative session...

  13. IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 25, NO. 4, NOVEMBER 2010 1823 Season-Dependent Condition-Based Maintenance

    E-Print Network [OSTI]

    Ding, Yu

    energy costs, wind power becomes one of the fastest growing renewable energy sources around the world to the total energy production cost is 10%­20% for a wind farm. Vachon [4] shows that the O&M costs can account. The total capacity of wind energy in the U.S. rose 45% in 2007 and is forecast to nearly triple by 2012 [1

  14. Assessing the impact of space weather on the electric power grid based on insurance claims for industrial electrical equipment

    E-Print Network [OSTI]

    Schrijver, Carolus J; Murtagh, William; Petrinec, Stephen M

    2014-01-01T23:59:59.000Z

    Geomagnetically induced currents are known to induce disturbances in the electric power grid. Here, we perform a statistical analysis of 11,242 insurance claims from 2000 through 2010 for equipment losses and related business interruptions in North-American commercial organizations that are associated with damage to, or malfunction of, electrical and electronic equipment. We find that claims rates are elevated on days with elevated geomagnetic activity by approximately 20% for the top 5%, and by about 10% for the top third of most active days ranked by daily maximum variability of the geomagnetic field. When focusing on the claims explicitly attributed to electrical surges (amounting to more than half the total sample), we find that the dependence of claims rates on geomagnetic activity mirrors that of major disturbances in the U.S. high-voltage electric power grid. The claims statistics thus reveal that large-scale geomagnetic variability couples into the low-voltage power distribution network and that relat...

  15. Demonstration of a Novel Synchrophasor-based Situational Awareness System: Wide Area Power System Visualization, On-line Event Replay and Early Warning of Grid Problems

    SciTech Connect (OSTI)

    Rosso, A.

    2012-12-31T23:59:59.000Z

    Since the large North Eastern power system blackout on August 14, 2003, U.S. electric utilities have spent lot of effort on preventing power system cascading outages. Two of the main causes of the August 14, 2003 blackout were inadequate situational awareness and inadequate operator training In addition to the enhancements of the infrastructure of the interconnected power systems, more research and development of advanced power system applications are required for improving the wide-area security monitoring, operation and planning in order to prevent large- scale cascading outages of interconnected power systems. It is critically important for improving the wide-area situation awareness of the operators or operational engineers and regional reliability coordinators of large interconnected systems. With the installation of large number of phasor measurement units (PMU) and the related communication infrastructure, it will be possible to improve the operators’ situation awareness and to quickly identify the sequence of events during a large system disturbance for the post-event analysis using the real-time or historical synchrophasor data. The purpose of this project was to develop and demonstrate a novel synchrophasor-based comprehensive situational awareness system for control centers of power transmission systems. The developed system named WASA (Wide Area Situation Awareness) is intended to improve situational awareness at control centers of the power system operators and regional reliability coordinators. It consists of following main software modules: • Wide-area visualizations of real-time frequency, voltage, and phase angle measurements and their contour displays for security monitoring. • Online detection and location of a major event (location, time, size, and type, such as generator or line outage). • Near-real-time event replay (in seconds) after a major event occurs. • Early warning of potential wide-area stability problems. The system has been deployed and demonstrated at the Tennessee Valley Authority (TVA) and ISO New England system using real-time synchrophasor data from openPDC. Apart from the software product, the outcome of this project consists of a set of technical reports and papers describing the mathematical foundations and computational approaches of different tools and modules, implementation issues and considerations, lessons learned, and the results of lidation processes.

  16. Dose commitments due to radioactive releases from nuclear power plant sites: Methodology and data base. Supplement 1

    SciTech Connect (OSTI)

    Baker, D.A. [Pacific Northwest National Lab., Richland, WA (United States)] [Pacific Northwest National Lab., Richland, WA (United States)

    1996-06-01T23:59:59.000Z

    This manual describes a dose assessment system used to estimate the population or collective dose commitments received via both airborne and waterborne pathways by persons living within a 2- to 80-kilometer region of a commercial operating power reactor for a specific year of effluent releases. Computer programs, data files, and utility routines are included which can be used in conjunction with an IBM or compatible personal computer to produce the required dose commitments and their statistical distributions. In addition, maximum individual airborne and waterborne dose commitments are estimated and compared to 10 CFR Part 50, Appendix 1, design objectives. This supplement is the last report in the NUREG/CR-2850 series.

  17. Fuel Cell Power Model Version 2: Startup Guide, System Designs, and Case Studies. Modeling Electricity, Heat, and Hydrogen Generation from Fuel Cell-Based Distributed Energy Systems

    SciTech Connect (OSTI)

    Steward, D.; Penev, M.; Saur, G.; Becker, W.; Zuboy, J.

    2013-06-01T23:59:59.000Z

    This guide helps users get started with the U.S. Department of Energy/National Renewable Energy Laboratory Fuel Cell Power (FCPower) Model Version 2, which is a Microsoft Excel workbook that analyzes the technical and economic aspects of high-temperature fuel cell-based distributed energy systems with the aim of providing consistent, transparent, comparable results. This type of energy system would provide onsite-generated heat and electricity to large end users such as hospitals and office complexes. The hydrogen produced could be used for fueling vehicles or stored for later conversion to electricity.

  18. Improved Performance of an Air Cooled Condenser (ACC) Using SPX Wind Guide Technology at Coal-Based Thermoelectric Power Plants

    SciTech Connect (OSTI)

    Ken Mortensen

    2010-12-31T23:59:59.000Z

    This project added a new airflow enhancement technology to an existing ACC cooling process at a selected coal power plant. Airflow parameters and efficiency improvement for the main plant cooling process using the applied technology were determined and compared with the capabilities of existing systems. The project required significant planning and pre-test execution in order to reach the required Air Cooled Condenser system configuration for evaluation. A host Power Plant ACC system had to be identified, agreement finalized, and addition of the SPX ACC Wind Guide Technology completed on that site. Design of the modification, along with procurement, fabrication, instrumentation, and installation of the new airflow enhancement technology were executed. Baseline and post-modification cooling system data was collected and evaluated. The improvement of ACC thermal performance after SPX wind guide installation was clear. Testing of the improvement indicates there is a 5% improvement in heat transfer coefficient in high wind conditions and 1% improvement at low wind speed. The benefit increased with increasing wind speed. This project was completed on schedule and within budget.

  19. IEEE TRANSACTIONS ON POWER DELIVERY, VOL. 28, NO. 4, OCTOBER 2013 2373 Market-Based Control in Emerging

    E-Print Network [OSTI]

    Nesterov, Yurii

    prosumers, market- based control needs to make prosumer benets aligned with reg- ulator/DSOs concerns, thus prosumer behaviors. Not necessarily, the prosumer would be an "ideal citizen" [9] who follows a cooperative prosumers

  20. Internet Based, GIS Catalog of Non-Traditional Sources of Cooling Water for Use at America's Coal-Fired Power Plants

    SciTech Connect (OSTI)

    J. Daniel Arthur

    2011-09-30T23:59:59.000Z

    In recent years, rising populations and regional droughts have caused coal-fired power plants to temporarily curtail or cease production due to a lack of available water for cooling. In addition, concerns about the availability of adequate supplies of cooling water have resulted in cancellation of plans to build much-needed new power plants. These issues, coupled with concern over the possible impacts of global climate change, have caused industry and community planners to seek alternate sources of water to supplement or replace existing supplies. The Department of Energy, through the National Energy Technology Laboratory (NETL) is researching ways to reduce the water demands of coal-fired power plants. As part of the NETL Program, ALL Consulting developed an internet-based Catalog of potential alternative sources of cooling water. The Catalog identifies alternative sources of water, such as mine discharge water, oil and gas produced water, saline aquifers, and publicly owned treatment works (POTWs), which could be used to supplement or replace existing surface water sources. This report provides an overview of the Catalog, and examines the benefits and challenges of using these alternative water sources for cooling water.

  1. ZnO nanotube-based dye-sensitized solar cell and its application in self-powered devices This article has been downloaded from IOPscience. Please scroll down to see the full text article.

    E-Print Network [OSTI]

    Wang, Zhong L.

    ZnO nanotube-based dye-sensitized solar cell and its application in self-powered devices.1088/0957-4484/21/40/405203 ZnO nanotube-based dye-sensitized solar cell and its application in self-powered devices Jingbin Han1-length nanotubes as the photoanode for a dye-sensitized solar cell (DSSC), a full-sun conversion efficiency of 1

  2. Open-cycle magnetohydrodynamic power plant based upon direct-contact closed-loop high-temperature heat exchanger

    DOE Patents [OSTI]

    Berry, Gregory F. (Naperville, IL); Minkov, Vladimir (Skokie, IL); Petrick, Michael (Joliet, IL)

    1988-01-01T23:59:59.000Z

    A magnetohydrodynamic (MHD) power generating system in which ionized combustion gases with slag and seed are discharged from an MHD combustor and pressurized high temperature inlet air is introduced into the combustor for supporting fuel combustion at high temperatures necessary to ionize the combustion gases, and including a heat exchanger in the form of a continuous loop with a circulating heat transfer liquid such as copper oxide. The heat exchanger has an upper horizontal channel for providing direct contact between the heat transfer liquid and the combustion gases to cool the gases and condense the slag which thereupon floats on the heat transfer liquid and can be removed from the channel, and a lower horizontal channel for providing direct contact between the heat transfer liquid and pressurized air for preheating the inlet air. The system further includes a seed separator downstream of the heat exchanger.

  3. Open-cycle magnetohydrodynamic power plant based upon direct-contact closed-loop high-temperature heat exchanger

    DOE Patents [OSTI]

    Berry, G.F.; Minkov, V.; Petrick, M.

    1981-11-02T23:59:59.000Z

    A magnetohydrodynamic (MHD) power generating system is described in which ionized combustion gases with slag and seed are discharged from an MHD combustor and pressurized high temperature inlet air is introduced into the combustor for supporting fuel combustion at high temperatures necessary to ionize the combustion gases, and including a heat exchanger in the form of a continuous loop with a circulating heat transfer liquid such as copper oxide. The heat exchanger has an upper horizontal channel for providing direct contact between the heat transfer liquid and the combustion gases to cool the gases and condense the slag which thereupon floats on the heat transfer liquid and can be removed from the channel, and a lower horizontal channel for providing direct contact between the heat transfer liquid and pressurized air for preheating the inlet air. The system further includes a seed separator downstream of the heat exchanger.

  4. RESULTS OF THE TECHNICAL AND ECONOMIC FEASIBILITY ANALYSIS FOR A NOVEL BIOMASS GASIFICATION-BASED POWER GENERATION SYSTEM FOR THE FOREST PRODUCTS INDUSTRY

    SciTech Connect (OSTI)

    Bruce Bryan; Joseph Rabovitser; Sunil Ghose; Jim Patel

    2003-11-01T23:59:59.000Z

    In 2001, the Gas Technology Institute (GTI) entered into Cooperative Agreement DE-FC26-01NT41108 with the U.S. Department of Energy (DOE) for an Agenda 2020 project to develop an advanced biomass gasification-based power generation system for near-term deployment in the Forest Products Industry (FPI). The advanced power system combines three advanced components, including biomass gasification, 3-stage stoker-fired combustion for biomass conversion, and externally recuperated gas turbines (ERGTs) for power generation. The primary performance goals for the advanced power system are to provide increased self-generated power production for the mill and to increase wastewood utilization while decreasing fossil fuel use. Additional goals are to reduce boiler NOx and CO{sub 2} emissions. The current study was conducted to determine the technical and economic feasibility of an Advanced Power Generation System capable of meeting these goals so that a capital investment decision can be made regarding its implementation at a paper mill demonstration site in DeRidder, LA. Preliminary designs and cost estimates were developed for all major equipment, boiler modifications and balance of plant requirements including all utilities required for the project. A three-step implementation plan was developed to reduce technology risk. The plant design was found to meet the primary objectives of the project for increased bark utilization, decreased fossil fuel use, and increased self-generated power in the mill. Bark utilization for the modified plant is significantly higher (90-130%) than current operation compared to the 50% design goal. For equivalent steam production, the total gas usage for the fully implemented plant is 29% lower than current operation. While the current average steam production from No.2 Boiler is about 213,000 lb/h, the total steam production from the modified plant is 379,000 lb/h. This steam production increase will be accomplished at a grate heat release rate (GHRR) equal to the original boiler design. Boiler efficiencies (cogeneration-steam plus air) is increased from the original design value of 70% to 78.9% due to a combination of improved burnout, operation with lower excess air, and drier fuel. For the fully implemented plant, the thermal efficiency of fuel to electricity conversion is 79.8% in the cogeneration mode, 5% above the design goal. Finally, self-generated electricity will be increased from the 10.8 MW currently attributable to No.2 Boiler to 46.7MW, an increase of 332%. Environmental benefits derived from the system include a reduction in NOx emissions from the boiler of about 30-50% (90-130 tons/year) through syngas reburning, improved carbon burnout and lower excess air. This does not count NOx reduction that may be associated with replacement of purchased electricity. The project would reduce CO{sub 2} emissions from the generation of electricity to meet the mill's power requirements, including 50,000 tons/yr from a net reduction in gas usage in the mill and an additional 410,000 tons/yr reduction in CO{sub 2} emissions due to a 34 MW reduction of purchased electricity. The total CO{sub 2} reduction amounts to about 33% of the CO{sub 2} currently generated to meet the mills electricity requirement. The overall conclusion of the study is that while significant engineering challenges are presented by the proposed system, they can be met with operationally acceptable and cost effective solutions. The benefits of the system can be realized in an economic manner, with a simple payback period on the order of 6 years. The results of the study are applicable to many paper mills in the U.S. firing woodwastes and other solid fuels for steam and power production.

  5. Performance-degradation model for Li4Ti5O12-based battery cells used in wind power applications

    E-Print Network [OSTI]

    Teodorescu, Remus

    Terms--Lithium-ion battery, Performance model, Elec- trochemical Impedance Spectroscopy, Degradation. I on measurements performed during an accelerated cycling ageing process. Since ageing tests under real operation) measurements. TABLE I VARIOUS CHEMISTRIES OF LI-ION BATTERIES AND THEIR CHARACTERISTICS (BASED ON [5

  6. Power-Efficient Radio Resource Allocation for Low-Medium-Altitude Aerial Platform Based TD-LTE

    E-Print Network [OSTI]

    Quartly, Graham

    in emergency scenarios, a low-medium-altitude aerial platform based time-division-duplex long term evolution. A similar scenario occurred after the recent tsunami near Sendai, Japan. Since then lowMAX or combinations of them. The time-division-duplex long term evolution (TD-LTE) system is considered as one

  7. 4968 IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 28, NO. 4, NOVEMBER 2013 Optimized FTR Portfolio Construction Based on the

    E-Print Network [OSTI]

    Gross, George

    handling and heavy computing demands of locational marginal price (LMP)-difference-based methods for FTR, each seller (buyer) re- ceives (pays) the locational marginal price (LMP) at the point of Manuscript whomever they desire [1]. The result is higher electricity prices at various locations in the grid. Our

  8. Power module assembly

    DOE Patents [OSTI]

    Campbell, Jeremy B. (Torrance, CA); Newson, Steve (Redondo Beach, CA)

    2011-11-15T23:59:59.000Z

    A power module assembly of the type suitable for deployment in a vehicular power inverter, wherein the power inverter has a grounded chassis, is provided. The power module assembly comprises a conductive base layer electrically coupled to the chassis, an insulating layer disposed on the conductive base layer, a first conductive node disposed on the insulating layer, a second conductive node disposed on the insulating layer, wherein the first and second conductive nodes are electrically isolated from each other. The power module assembly also comprises a first capacitor having a first electrode electrically connected to the conductive base layer, and a second electrode electrically connected to the first conductive node, and further comprises a second capacitor having a first electrode electrically connected to the conductive base layer, and a second electrode electrically connected to the second conductive node.

  9. U.S. Department of Energy Electricity Advisory Committee Meeting

    Broader source: Energy.gov (indexed) [DOE]

    standards could be looked at as a way to say if you're a micro grid or a virtual power plant or distributed generation, your inverter and your protection need to be able...

  10. Power mixture and green body for producing silicon nitride base articles of high fracture toughness and strength

    DOE Patents [OSTI]

    Huckabee, M.L.; Buljan, S.T.; Neil, J.T.

    1991-09-17T23:59:59.000Z

    A powder mixture and a green body for producing a silicon nitride-based article of improved fracture toughness and strength are disclosed. The powder mixture includes (a) a bimodal silicon nitride powder blend consisting essentially of about 10-30% by weight of a first silicon nitride powder of an average particle size of about 0.2 [mu]m and a surface area of about 8-12m[sup 2]g, and about 70-90% by weight of a second silicon nitride powder of an average particle size of about 0.4-0.6 [mu]m and a surface area of about 2-4 m[sup 2]/g, (b) about 10-50 percent by volume, based on the volume of the densified article, of refractory whiskers or fibers having an aspect ratio of about 3-150 and having an equivalent diameter selected to produce in the densified article an equivalent diameter ratio of the whiskers or fibers to grains of silicon nitride of greater than 1.0, and (c) an effective amount of a suitable oxide densification aid. The green body is formed from the powder mixture, an effective amount of a suitable oxide densification aid, and an effective amount of a suitable organic binder. No Drawings

  11. Power mixture and green body for producing silicon nitride base & articles of high fracture toughness and strength

    DOE Patents [OSTI]

    Huckabee, Marvin L. (Marlboro, MA); Buljan, Sergej-Tomislav (Acton, MA); Neil, Jeffrey T. (Acton, MA)

    1991-01-01T23:59:59.000Z

    A powder mixture and a green body for producing a silicon nitride-based article of improved fracture toughness and strength. The powder mixture includes 9a) a bimodal silicon nitride powder blend consisting essentially of about 10-30% by weight of a first silicon mitride powder of an average particle size of about 0.2 .mu.m and a surface area of about 8-12m.sup.2 g, and about 70-90% by weight of a second silicon nitride powder of an average particle size of about 0.4-0.6 .mu.m and a surface area of about 2-4 m.sup.2 /g, (b) about 10-50 percent by volume, based on the volume of the densified article, of refractory whiskers or fibers having an aspect ratio of about 3-150 and having an equivalent diameter selected to produce in the densified articel an equivalent diameter ratio of the whiskers or fibers to grains of silicon nitride of greater than 1.0, and (c) an effective amount of a suitable oxide densification aid. The green body is formed from the powder mixture, an effective amount of a suitable oxide densification aid, and an effective amount of a suitable organic binder.

  12. Integrated All-silicon Thin-film Power Electronics on Flexible Sheets For Ubiquitous Wireless Charging Stations based on Solar-energy Harvesting

    E-Print Network [OSTI]

    . The blocks overcome these challenges and generate AC power using a power inverter and control circuits, all the power inverter circuit. To generate an AC output current, the two solar modules (S1/2) are used maximizes the current, and all of the S1/2 current is delivered to the load, yielding high power-inverter

  13. vision clean power | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the left of this page. 1. Important products using CO2 as feedstock include urea and methanol Power Commercial Power Production based on Gasification Typical IGCC Configuration...

  14. Fuel Cycle Comparison for Distributed Power Technologies

    Fuel Cell Technologies Publication and Product Library (EERE)

    This report examines backup power and prime power systems and addresses the potential energy and environmental effects of substituting fuel cells for existing combustion technologies based on microtur

  15. Efficient Indexing Data Structures for Flash-Based Sensor Devices *

    E-Print Network [OSTI]

    Najjar, Walid A.

    index structures, MicroHash and MicroGF (Micro Grid Files), exploit the asymmetric read/write and wear GUNOPULOS, WALID A. NAJJAR University of California, Riverside Flash Memory is the most prevalent storage behind these index structures is that expensive random access deletions are completely eliminated. Micro

  16. Efficient Indexing Data Structures for Flash-Based Sensor Devices

    E-Print Network [OSTI]

    Jiang, Anxiao "Andrew"

    structures, MicroHash and MicroGF (micro grid files), exploit the asymmetric read/write and wear, and WALID A. NAJJAR University of California, Riverside Flash memory is the most prevalent storage medium behind these index structures is that expensive random access deletions are completely eliminated. Micro

  17. Modeling Long-term Creep Performance for Welded Nickel-base Superalloy Structures for Power Generation Systems

    SciTech Connect (OSTI)

    Shen, Chen

    2015-01-01T23:59:59.000Z

    We report here a constitutive model for predicting long-term creep strain evolution in ?’ strengthened Ni-base superalloys. Dislocation climb-bypassing ?’, typical in intermediate ?’ volume fraction (~20%) alloys, is considered as the primary deformation mechanism. Dislocation shearing ?’ to anti-phase boundary (APB) faults and diffusional creep are also considered for high-stress and high-temperature low-stress conditions, respectively. Additional damage mechanism is taken into account for rapid increase in tertiary creep strain. The model has been applied to Alloy 282, and calibrated in a temperature range of 1375-1450?F, and stress range of 15-45ksi. The model parameters and a MATLAB code are provided. This report is prepared by Monica Soare and Chen Shen at GE Global Research. Technical discussions with Dr. Vito Cedro are greatly appreciated. This work was supported by DOE program DE-FE0005859

  18. Georgia Power- Solar Buyback Program

    Broader source: Energy.gov [DOE]

    Georgia Power, the state's largest utility, has established a green power program, that allows the company to purchase limited solar generation at a premium price based on other customers volunta...

  19. Tunable sub-20 fs pulses from a 500 kHz OPCPA with 15 W average power based on an all-ytterbium laser

    E-Print Network [OSTI]

    Puppin, Michele; Prochnow, Oliver; Ahrens, Jan; Binhammer, Thomas; Morgner, Uwe; Krenz, Marcel; Wolf, Martin; Ernstorfer, Ralph

    2014-01-01T23:59:59.000Z

    An optical parametric chirped pulse amplifier fully based on Yb lasers at 500 kHz is described. Passive optical-synchronization is achieved between a fiber laser-pumped white-light and a 515 nm pump produced with a 200 W picosecond Yb:YAG InnoSlab amplifier. An output power up to 19.7 W with long-term stability of 0.3% is demonstrated for wavelength tunable pulses between 680 nm and 900 nm and spectral stability of 0.2%; 16.5 W can be achieved with a bandwidth supporting 5.4 fs pulses. We demonstrate compression of 30 microjoule pulses to sub-20 fs duration with a prism compressor, suitable for high harmonic generation.

  20. Qualification for PowerInsight accuracy of power measurements.

    SciTech Connect (OSTI)

    DeBonis, David; Laros, James H.,; Pedretti, Kevin Thomas Tauke

    2013-11-01T23:59:59.000Z

    Accuracy of component based power measuring devices forms a necessary basis for research in the area of power-e cient and power-aware computing. The accuracy of these devices must be quanti ed within a reasonable tolerance. This study focuses on PowerInsight, an out- of-band embedded measuring device which takes readings of power rails on compute nodes within a HPC system in realtime. We quantify how well the device performs in comparison to a digital oscilloscope as well as PowerMon2. We show that the accuracy is within a 6% deviation on measurements under reasonable load.

  1. Requirements for Computer Based-Procedures for Nuclear Power Plant Field Operators Results from a Qualitative Study

    SciTech Connect (OSTI)

    Katya Le Blanc; Johanna Oxstrand

    2012-05-01T23:59:59.000Z

    Although computer-based procedures (CBPs) have been investigated as a way to enhance operator performance on procedural tasks in the nuclear industry for almost thirty years, they are not currently widely deployed at United States utilities. One of the barriers to the wide scale deployment of CBPs is the lack of operational experience with CBPs that could serve as a sound basis for justifying the use of CBPs for nuclear utilities. Utilities are hesitant to adopt CBPs because of concern over potential costs of implementation, and concern over regulatory approval. Regulators require a sound technical basis for the use of any procedure at the utilities; without operating experience to support the use CBPs, it is difficult to establish such a technical basis. In an effort to begin the process of developing a technical basis for CBPs, researchers at Idaho National Laboratory are partnering with industry to explore CBPs with the objective of defining requirements for CBPs and developing an industry-wide vision and path forward for the use of CBPs. This paper describes the results from a qualitative study aimed at defining requirements for CBPs to be used by field operators and maintenance technicians.

  2. Economic feasibility analysis of distributed electric power generation based upon the natural gas-fired fuel cell. Final report

    SciTech Connect (OSTI)

    Not Available

    1994-03-01T23:59:59.000Z

    The final report provides a summary of results of the Cost of Ownership Model and the circumstances under which a distributed fuel cell is economically viable. The analysis is based on a series of micro computer models estimate the capital and operations cost of a fuel cell central utility plant configuration. Using a survey of thermal and electrical demand profiles, the study defines a series of energy user classes. The energy user class demand requirements are entered into the central utility plant model to define the required size the fuel cell capacity and all supporting equipment. The central plant model includes provisions that enables the analyst to select optional plant features that are most appropriate to a fuel cell application, and that are cost effective. The model permits the choice of system features that would be suitable for a large condominium complex or a residential institution such as a hotel, boarding school or prison. Other applications are also practical; however, such applications have a higher relative demand for thermal energy, a characteristic that is well-suited to a fuel cell application with its free source of hot water or steam. The analysis combines the capital and operation from the preceding models into a Cost of Ownership Model to compute the plant capital and operating costs as a function of capacity and principal features and compares these estimates to the estimated operating cost of the same central plant configuration without a fuel cell.

  3. Critical pulse power components

    SciTech Connect (OSTI)

    Sarjeant, W.J.; Rohwein, G.J.

    1981-01-01T23:59:59.000Z

    Critical components for pulsed power conditioning systems will be reviewed. Particular emphasis will be placed on those components requiring significant development efforts. Capacitors, for example, are one of the weakest elements in high-power pulsed systems, especially when operation at high-repetition frequencies for extended periods of time are necessary. Switches are by far the weakest active components of pulse power systems. In particular, opening switches are essentially nonexistent for most applications. Insulaton in all systems and components requires development and improvement. Efforts under way in technology base development of pulse power components will be discussed.

  4. An economic feasibility analysis of distributed electric power generation based upon the natural gas-fired fuel cell: a model of a central utility plant.

    SciTech Connect (OSTI)

    Not Available

    1993-06-30T23:59:59.000Z

    This central utilities plant model details the major elements of a central utilities plant for several classes of users. The model enables the analyst to select optional, cost effective, plant features that are appropriate to a fuel cell application. These features permit the future plant owner to exploit all of the energy produced by the fuel cell, thereby reducing the total cost of ownership. The model further affords the analyst an opportunity to identify avoided costs of the fuel cell-based power plant. This definition establishes the performance and capacity information, appropriate to the class of user, to support the capital cost model and the feasibility analysis. It is detailed only to the depth required to identify the major elements of a fuel cell-based system. The model permits the choice of system features that would be suitable for a large condominium complex or a residential institution such as a hotel, boarding school or prison. The user may also select large office buildings that are characterized by 12 to 16 hours per day of operation or industrial users with a steady demand for thermal and electrical energy around the clock.

  5. Thermionic power generation. January 1972-December 1980 (citations from the International Aerospace Abstracts Data Base). Report for January 1972-December 1980

    SciTech Connect (OSTI)

    Not Available

    1980-12-01T23:59:59.000Z

    Research on thermionic power generation, power plant design, converter design, and basic research on thermionic materials are cited in the bibliography. Spacecraft applications are also included. (Contains 142 citations, fully indexed and including a table of contents.)

  6. Computational power of correlations

    E-Print Network [OSTI]

    Janet Anders; Dan E. Browne

    2009-02-05T23:59:59.000Z

    We study the intrinsic computational power of correlations exploited in measurement-based quantum computation. By defining a general framework the meaning of the computational power of correlations is made precise. This leads to a notion of resource states for measurement-based \\textit{classical} computation. Surprisingly, the Greenberger-Horne-Zeilinger and Clauser-Horne-Shimony-Holt problems emerge as optimal examples. Our work exposes an intriguing relationship between the violation of local realistic models and the computational power of entangled resource states.

  7. A Synergistic Combination of Advanced Separation and Chemical Scale Inhibitor Technologies for Efficient Use of Imparied Water As Cooling Water in Coal-based Power Plants

    SciTech Connect (OSTI)

    Jasbir Gill

    2010-08-30T23:59:59.000Z

    Nalco Company is partnering with Argonne National Laboratory (ANL) in this project to jointly develop advanced scale control technologies that will provide cost-effective solutions for coal-based power plants to operate recirculating cooling water systems at high cycles using impaired waters. The overall approach is to use combinations of novel membrane separations and scale inhibitor technologies that will work synergistically, with membrane separations reducing the scaling potential of the cooling water and scale inhibitors extending the safe operating range of the cooling water system. The project started on March 31, 2006 and ended in August 30, 2010. The project was a multiyear, multi-phase project with laboratory research and development as well as a small pilot-scale field demonstration. In Phase 1 (Technical Targets and Proof of Concept), the objectives were to establish quantitative technical targets and develop calcite and silica scale inhibitor chemistries for high stress conditions. Additional Phase I work included bench-scale testing to determine the feasibility of two membrane separation technologies (electrodialysis ED and electrode-ionization EDI) for scale minimization. In Phase 2 (Technology Development and Integration), the objectives were to develop additional novel scale inhibitor chemistries, develop selected separation processes, and optimize the integration of the technology components at the laboratory scale. Phase 3 (Technology Validation) validated the integrated system's performance with a pilot-scale demonstration. During Phase 1, Initial evaluations of impaired water characteristics focused on produced waters and reclaimed municipal wastewater effluents. Literature and new data were collected and evaluated. Characteristics of produced waters vary significantly from one site to another, whereas reclaimed municipal wastewater effluents have relatively more uniform characteristics. Assessment to date confirmed that calcite and silica/silicate are two common potential cycle-limiting minerals for using impaired waters. For produced waters, barium sulfate and calcium sulfate are two additional potential cycle-limiting minerals. For reclaimed municipal wastewater effluents, calcium phosphate scaling can be an issue, especially in the co-presence of high silica. Computational assessment, using a vast amount of Nalco's field data from coal fired power plants, showed that the limited use and reuse of impaired waters is due to the formation of deposit caused by the presence of iron, high hardness, high silica and high alkalinity in the water. Appropriate and cost-effective inhibitors were identified and developed - LL99B0 for calcite and gypsum inhibition and TX-15060 for silica inhibition. Nalco's existing dispersants HSP-1 and HSP-2 has excellent efficacy for dispersing Fe and Mn. ED and EDI were bench-scale tested by the CRADA partner Argonne National Laboratory for hardness, alkalinity and silica removal from synthetic make-up water and then cycled cooling water. Both systems showed low power consumption and 98-99% salt removal, however, the EDI system required 25-30% less power for silica removal. For Phase 2, the EDI system's performance was optimized and the length of time between clean-in-place (CIP) increased by varying the wafer composition and membrane configuration. The enhanced EDI system could remove 88% of the hardness and 99% of the alkalinity with a processing flux of 19.2 gal/hr/m{sup 2} and a power consumption of 0.54 kWh/100 gal water. Bench tests to screen alternative silica/silicate scale inhibitor chemistries have begun. The silica/silicate control approaches using chemical inhibitors include inhibition of silicic acid polymerization and dispersion of silica/silicate crystals. Tests were conducted with an initial silica concentration of 290-300 mg/L as SiO{sub 2} at pH 7 and room temperature. A proprietary new chemistry was found to be promising, compared with a current commercial product commonly used for silica/silicate control. Additional pilot cooling tower testing confirmed

  8. Abstract --With the increasing acceptance, micro-grid, combined with distributed generation (DG), may be operated in

    E-Print Network [OSTI]

    Chen, Zhe

    ), may be operated in two modes: grid-connected mode and island mode. In grid connected mode, energy operation point; the coordinate control of voltage and frequency with a feed forward control of the voltage the operation modes. The new droop control method has been validated through simulations by PSCAD software

  9. Global Optimization of Optimal Power Flow

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    /03/2013 4 Power balance Power flows Physical limits Nonconvex constraints #12;8/26/2013 2 SDP Relaxation renewables into the grid e.g., Wind: Hard to forecast. ­ Base load power plants cannot change their output problems. Multi-Period OPF Formulation 12/03/2013 9 Power balance Power flows Physical limits Storage

  10. Pool power control in remelting systems

    DOE Patents [OSTI]

    Williamson, Rodney L. (Albuquerque, NM); Melgaard, David K. (Albuquerque, NM); Beaman, Joseph J. (Austin, TX)

    2011-12-13T23:59:59.000Z

    An apparatus for and method of controlling a remelting furnace comprising adjusting current supplied to an electrode based upon a predetermined pool power reference value and adjusting the electrode drive speed based upon the predetermined pool power reference value.

  11. Power marketing and renewable energy

    SciTech Connect (OSTI)

    Fang, J.M.

    1997-09-01T23:59:59.000Z

    Power marketing refers to wholesale and retail transactions of electric power made by companies other than public power entities and the regulated utilities that own the generation and distribution lines. The growth in power marketing has been a major development in the electric power industry during the last few years, and power marketers are expected to realize even more market opportunities as electric industry deregulation proceeds from wholesale competition to retail competition. This Topical Issues Brief examines the nature of the power marketing business and its relationship with renewable power. The information presented is based on interviews conducted with nine power marketing companies, which accounted for almost 54% of total power sales by power marketers in 1995. These interviews provided information on various viewpoints of power marketers, their experience with renewables, and their respective outlooks for including renewables in their resource portfolios. Some basic differences exist between wholesale and retail competition that should be recognized when discussing power marketing and renewable power. At the wholesale level, the majority of power marketers stress the commodity nature of electricity. The primary criteria for developing resource portfolios are the same as those of their wholesale customers: the cost and reliability of power supplies. At the retail level, electricity may be viewed as a product that includes value-added characteristics or services determined by customer preferences.

  12. High power connection system

    DOE Patents [OSTI]

    Schaefer, Christopher E. (Warren, OH); Beer, Robert C. (Noblesville, IN); McCall, Mark D. (Youngstown, OH)

    2000-01-01T23:59:59.000Z

    A high power connection system adapted for automotive environments which provides environmental and EMI shielding includes a female connector, a male connector, and a panel mount. The female connector includes a female connector base and a snap fitted female connector cover. The male connector includes a male connector base and a snap fitted male connector cover. The female connector base has at least one female power terminal cavity for seatably receiving a respective female power terminal. The male connector base has at least one male power terminal cavity for seatably receiving a respective male power terminal. The female connector is covered by a cover seal and a conductive shroud. A pair of lock arms protrude outward from the front end of the male connector base, pass through the panel mount and interface with a lever of a lever rotatably connected to the shroud to thereby mechanically assist mating of the male and female connectors. Safety terminals in the male and female connectors provide a last-to-connect-first-to-break connection with an HVIL circuit.

  13. IEEE Power Engineering Society Conference Proceedings, SF, CA, June 12-16, 2005, to appear. An Agent-Based Computational Laboratory

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    , and the recommended use of locational marginal pricing and tradable financial transmission rights. All generators participating in restructured wholesale power markets must make repeated price and quantity offers prices across generators (general seller market power). They can also attempt to create locally

  14. Bacteria power may be possible http://www.masslive.com/hampfrank/republican/index.ssf?/base/news... 1 of 2 5/12/2006 2:33 PM

    E-Print Network [OSTI]

    Lovley, Derek

    fuel cells powered by so-called geobacter, tiny bacteria that convert iron to electricity, to the point geobacter) to change that trash to electricity," Lovley said. A typical fuel cell converts fuels that conduct electricity to the outside for use as power. The UMass researchers found that when the geobacter

  15. IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 24, NO. 2, FEBRUARY 2009 559 Design and Implementation of an Adaptive Tuning System Based on Desired

    E-Print Network [OSTI]

    IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 24, NO. 2, FEBRUARY 2009 559 Design and Implementation with component degradation, input voltage variations, etc. These types of power stage pa- rameter changes and reliability over a wider range of possible operating points. Recent work in the area of digital control of dc

  16. Extending the Lifetime of a Network of Battery-Powered Mobile Devices by Remote Processing: A Markovian Decision-based Approach

    E-Print Network [OSTI]

    Pedram, Massoud

    Extending the Lifetime of a Network of Battery-Powered Mobile Devices by Remote Processing the lifetime of a battery- powered mobile host in a client-server wireless network by using task migration-line adaptive policy is proposed, which dynamically monitors the channel conditions and the server behavior

  17. Nuclear Power

    E-Print Network [OSTI]

    Vilhena and Bardo E.J. Bodmann Carbon-#1;? in Terrestrial and Aquatic Environment of Ignalina Nuclear Power Plant: Sources of Production, Releases and Dose Estimates #3;?? Jonas Mazeika Impact of radionuclide discharges from Temel?n Nuclear Power... (chapter 5), ? Instrumentation and control (chapter 6), ? Diagnostics (chapter 7), ? Safety evaluation methods (chapters 6, 8, 9 and 10), ? Environment and nuclear power plants (chapters 11 - 15), ? Human factors (chapter 16), ? Software development...

  18. Power LCAT

    ScienceCinema (OSTI)

    Drennen, Thomas

    2014-06-27T23:59:59.000Z

    POWER LCAT is a software tool used to compare elements of efficiency, cost, and environmental effects between different sources of energy.

  19. Power LCAT

    SciTech Connect (OSTI)

    Drennen, Thomas

    2012-08-15T23:59:59.000Z

    POWER LCAT is a software tool used to compare elements of efficiency, cost, and environmental effects between different sources of energy.

  20. Power system

    DOE Patents [OSTI]

    Hickam, Christopher Dale (Glasford, IL)

    2008-03-18T23:59:59.000Z

    A power system includes a prime mover, a transmission, and a fluid coupler having a selectively engageable lockup clutch. The fluid coupler may be drivingly connected between the prime mover and the transmission. Additionally, the power system may include a motor/generator drivingly connected to at least one of the prime mover and the transmission. The power-system may also include power-system controls configured to execute a control method. The control method may include selecting one of a plurality of modes of operation of the power system. Additionally, the control method may include controlling the operating state of the lockup clutch dependent upon the mode of operation selected. The control method may also include controlling the operating state of the motor/generator dependent upon the mode of operation selected.

  1. Dynamic Testing of Wholesale Power Market Designs

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    Dynamic Testing of Wholesale Power Market Designs: An Open-Source Agent-Based Framework1 Junjie Sun ­ the Wholesale Power Market Platform (WPMP) ­ for common adoption by all U.S. wholesale power markets. Versions development and open-source implementation (in Java) of a computational wholesale power market organized

  2. Strathclyde powerS ahead

    E-Print Network [OSTI]

    Mottram, Nigel

    Strathclyde powerS ahead the future of renewable energy SHARING AND ENHANCING RESEARCH Discover the vision of Principal Professor Jim McDonald THE FUTURE OF ENERGY Strathclyde pioneers renewableEdicinE Snapshot the reSearcher Following a decade of environmental research in her native egypt, nabila saleem

  3. Optimum Power Control for Fading CDMA with Deterministic Sequences

    E-Print Network [OSTI]

    Ulukus, Sennur

    Optimum Power Control for Fading CDMA with Deterministic Sequences Onur Kaya Sennur Ulukus optimally in this paper are the transmit powers of the users. The quality-of-service based power control-to-interference-ratio (SIR) requirements while transmitting with the least amount of power. The SIR-based power control

  4. Power combiner

    DOE Patents [OSTI]

    Arnold, Mobius; Ives, Robert Lawrence

    2006-09-05T23:59:59.000Z

    A power combiner for the combining of symmetric and asymmetric traveling wave energy comprises a feed waveguide having an input port and a launching port, a reflector for reflecting launched wave energy, and a final waveguide for the collection and transport of launched wave energy. The power combiner has a launching port for symmetrical waves which comprises a cylindrical section coaxial to the feed waveguide, and a launching port for asymmetric waves which comprises a sawtooth rotated about a central axis.

  5. Cleco Power- Power Miser New Home Program

    Broader source: Energy.gov [DOE]

    Louisiana's Cleco Power offers energy efficiency incentives to eligible customers. Cleco Power offers a rate discount for residential customers building homes that meet the Power Miser Program...

  6. Development of gallium nitride power transistors

    E-Print Network [OSTI]

    Piedra, Daniel, M. Eng. Massachusetts Institute of Technology

    2011-01-01T23:59:59.000Z

    GaN-based high-voltage transistors have outstanding properties for the development of ultra-high efficiency and compact power electronics. This thesis describes a new process technology for the fabrication of GaN power ...

  7. Paper presented at the 2010 European Wind Energy Conference, Warsaw, Poland, 20-23 April 2010 Wind power prediction risk indices based on

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Paper presented at the 2010 European Wind Energy Conference, Warsaw, Poland, 20-23 April 2010 Wind. I. INTRODUCTION Wind power is a rapidly growing renewable energy source increasing its share Siebert** and George Kariniotakis*** MINES ParisTech, CEP - Center for Energy and Processes BP 207, 06904

  8. Abstract-This paper proposes a neural network based approach to estimating the maximum possible output power of a solar photovoltaic

    E-Print Network [OSTI]

    Lehman, Brad

    on a shaded solar panel at different hours of a day for several days. After training the neural network, its, building-integrated photovoltaic panels, and portable solar tents, it is common for a solar PV to become output power of a solar photovoltaic array under the non-uniform shadow conditions at a given geographic

  9. IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, VOL. 6, NO. 4, DECEMBER 1998 707 Algorithm-Based Low-Power Transform Coding

    E-Print Network [OSTI]

    Liu, K. J. Ray

    processing. I. INTRODUCTION DUE to the limited power-supply capability of current battery technology voltage goes down. In [1], the techniques of "parallel processing" and "pipelining" were suggested to compensate the speed penalty, in which a simple comparator circuit was used to demonstrate how parallel

  10. Orcas Power & Light- MORE Green Power Program (Washington)

    Broader source: Energy.gov [DOE]

    Orcas Power and Light (OPALCO), an electric cooperative serving Washington’s San Juan Islands, provides a production-based incentive for residential and commercial members who generate energy from...

  11. Superconducting electric power applications

    SciTech Connect (OSTI)

    Blaugher, R.D. [National Renewable Energy Lab., Golden, CO (United States)

    1997-06-01T23:59:59.000Z

    The application of superconductors to electric power systems has been actively pursued over the past 30 years. Following the realization of high-field, high-current superconductors in 1961, researchers applied these type II materials, such as Nb-Ti and Nb{sub 3}Sn, to laboratory magnets, followed by generators, motors, and transmission cables. Successful prototypes for the latter were constructed and tested by the mid-1980s. It is fair to assume that widespread utility acceptance of these low-temperature superconducting (LTS) power applications was compromised by the necessity for liquid helium cooling. The discovery of the high-temperature superconductors (HTS) in 1986, which offered the prospect for liquid nitrogen cooling, provided renewed interest and impetus and spurred the development of HTS power components. The expectations for HTS power components are, in fact, near realization, as a result of the rapid worldwide progress in HTS wire and tape development. This paper will review the history and present status of superconducting power-system-related applications. The major problems facing this technology and the prospects for commercialization and eventual integration into the utility sector will be discussed. General acceptance for superconducting power equipment by the electric utilities and other end-users will ultimately be based on the respective system performance, efficiency, reliability and maintenance, operational lifetime, and installed cost compared to conventional technologies.

  12. Reactive Power Compensator.

    DOE Patents [OSTI]

    El-Sharkawi, M.A.; Venkata, S.S.; Chen, M.; Andexler, G.; Huang, T.

    1992-07-28T23:59:59.000Z

    A system and method for determining and providing reactive power compensation for an inductive load. A reactive power compensator (50,50') monitors the voltage and current flowing through each of three distribution lines (52a, 52b, 52c), which are supplying three-phase power to one or more inductive loads. Using signals indicative of the current on each of these lines when the voltage waveform on the line crosses zero, the reactive power compensator determines a reactive power compensator capacitance that must be connected to the lines to maintain a desired VAR level, power factor, or line voltage. Alternatively, an operator can manually select a specific capacitance for connection to each line, or the capacitance can be selected based on a time schedule. The reactive power compensator produces control signals, which are coupled through optical fibers (102/106) to a switch driver (110, 110') to select specific compensation capacitors (112) for connections to each line. The switch driver develops triggering signals that are supplied to a plurality of series-connected solid state switches (350), which control charge current in one direction in respect to ground for each compensation capacitor. During each cycle, current flows from ground to charge the capacitors as the voltage on the line begins to go negative from its positive peak value. The triggering signals are applied to gate the solid state switches into a conducting state when the potential on the lines and on the capacitors reaches a negative peak value, thereby minimizing both the potential difference and across the charge current through the switches when they begin to conduct. Any harmonic distortion on the potential and current carried by the lines is filtered out from the current and potential signals used by the reactive power compensator so that it does not affect the determination of the required reactive compensation. 26 figs.

  13. Reactive power compensator

    DOE Patents [OSTI]

    El-Sharkawi, Mohamed A. (Renton, WA); Venkata, Subrahmanyam S. (Woodinville, WA); Chen, Mingliang (Kirkland, WA); Andexler, George (Everett, WA); Huang, Tony (Seattle, WA)

    1992-01-01T23:59:59.000Z

    A system and method for determining and providing reactive power compensation for an inductive load. A reactive power compensator (50,50') monitors the voltage and current flowing through each of three distribution lines (52a, 52b, 52c), which are supplying three-phase power to one or more inductive loads. Using signals indicative of the current on each of these lines when the voltage waveform on the line crosses zero, the reactive power compensator determines a reactive power compensator capacitance that must be connected to the lines to maintain a desired VAR level, power factor, or line voltage. Alternatively, an operator can manually select a specific capacitance for connection to each line, or the capacitance can be selected based on a time schedule. The reactive power compensator produces control signals, which are coupled through optical fibers (102/106) to a switch driver (110, 110') to select specific compensation capacitors (112) for connections to each line. The switch driver develops triggering signals that are supplied to a plurality of series-connected solid state switches (350), which control charge current in one direction in respect to ground for each compensation capacitor. During each cycle, current flows from ground to charge the capacitors as the voltage on the line begins to go negative from its positive peak value. The triggering signals are applied to gate the solid state switches into a conducting state when the potential on the lines and on the capacitors reaches a negative peak value, thereby minimizing both the potential difference and across the charge current through the switches when they begin to conduct. Any harmonic distortion on the potential and current carried by the lines is filtered out from the current and potential signals used by the reactive power compensator so that it does not affect the determination of the required reactive compensation.

  14. Power Factor Compensation (PFC) Power Factor Compensation

    E-Print Network [OSTI]

    Knobloch,Jürgen

    Power Factor Compensation (PFC) Power Factor Compensation The power factor (PF) is defined as the ratio between the active power and the apparent power of a system. If the current and voltage are periodic with period , and [ ), then the active power is defined by ( ) ( ) (their inner product

  15. Star Power

    ScienceCinema (OSTI)

    None

    2014-11-18T23:59:59.000Z

    The U.S. Department of Energy's Princeton Plasma Physics Laboratory has released ''Star Power,'' a new informational video that uses dramatic and beautiful images and thought-provoking interviews to highlight the importance of the Laboratory's research into magnetic fusion.

  16. Star Power

    SciTech Connect (OSTI)

    None

    2014-10-17T23:59:59.000Z

    The U.S. Department of Energy's Princeton Plasma Physics Laboratory has released ''Star Power,'' a new informational video that uses dramatic and beautiful images and thought-provoking interviews to highlight the importance of the Laboratory's research into magnetic fusion.

  17. Interference Mitigation via Power Control under the One-Power-Zone Constraint

    E-Print Network [OSTI]

    Yu, Wei

    Interference Mitigation via Power Control under the One-Power-Zone Constraint Hayssam Dahrouj, Wei on different zones. The objective of this paper is to design power control strategies to mitigation inter this constrained power control problem based on an iterative function evaluation technique. The proposed algorithms

  18. CARIBBEAN COLLOQUIUM ON POWER QUALITY (CCPQ), JUNE 2003 100 Defining Reactive Power in Circuit Transients via

    E-Print Network [OSTI]

    Stankoviæ, Aleksandar

    CARIBBEAN COLLOQUIUM ON POWER QUALITY (CCPQ), JUNE 2003 100 Defining Reactive Power in Circuit the notion of reactive power during circuit transients. The definition we propose is based on the concept, namely Short- Time Fourier Coefficients and Haar Wavelets. We illustrate this "dynamic" reactive power

  19. Multi-objective Optimal Power Flows to Evaluate Voltage Security Costs in Power Networks

    E-Print Network [OSTI]

    Cañizares, Claudio A.

    1 Multi-objective Optimal Power Flows to Evaluate Voltage Security Costs in Power Networks William Abstract-- In this paper, new optimal power flow (OPF) tech- niques are proposed based on multi- dard power flow models. The results obtained using the proposed mixed OPFs are compared and analyzed

  20. Investigation of Multi-Frequency Power Transmission and System

    E-Print Network [OSTI]

    Barazarte Conte, Ronald

    2012-10-19T23:59:59.000Z

    This dissertation presents a new power system transmission concept based on frequency selectivity named Multi-Frequency Power System (MFPS). This system allows for selective power transmission among terminals in an interconnected system...

  1. Reuse of Produced Water from CO2 Enhanced Oil Recovery, Coal-Bed Methane, and Mine Pool Water by Coal-Based Power Plants

    SciTech Connect (OSTI)

    Chad Knutson; Seyed Dastgheib; Yaning Yang; Ali Ashraf; Cole Duckworth; Priscilla Sinata; Ivan Sugiyono; Mark Shannon; Charles Werth

    2012-04-30T23:59:59.000Z

    Power generation in the Illinois Basin is expected to increase by as much as 30% by the year 2030, and this would increase the cooling water consumption in the region by approximately 40%. This project investigated the potential use of produced water from CO{sub 2} enhanced oil recovery (CO{sub 2}-EOR) operations; coal-bed methane (CBM) recovery; and active and abandoned underground coal mines for power plant cooling in the Illinois Basin. Specific objectives of this project were: (1) to characterize the quantity, quality, and geographic distribution of produced water in the Illinois Basin; (2) to evaluate treatment options so that produced water may be used beneficially at power plants; and (3) to perform a techno-economic analysis of the treatment and transportation of produced water to thermoelectric power plants in the Illinois Basin. Current produced water availability within the basin is not large, but potential flow rates up to 257 million liters per day (68 million gallons per day (MGD)) are possible if CO{sub 2}-enhanced oil recovery and coal bed methane recovery are implemented on a large scale. Produced water samples taken during the project tend to have dissolved solids concentrations between 10 and 100 g/L, and water from coal beds tends to have lower TDS values than water from oil fields. Current pretreatment and desalination technologies including filtration, adsorption, reverse osmosis (RO), and distillation can be used to treat produced water to a high quality level, with estimated costs ranging from $2.6 to $10.5 per cubic meter ($10 to $40 per 1000 gallons). Because of the distances between produced water sources and power plants, transportation costs tend to be greater than treatment costs. An optimization algorithm was developed to determine the lowest cost pipe network connecting sources and sinks. Total water costs increased with flow rate up to 26 million liters per day (7 MGD), and the range was from $4 to $16 per cubic meter ($15 to $60 per 1000 gallons), with treatment costs accounting for 13 â?? 23% of the overall cost. Results from this project suggest that produced water is a potential large source of cooling water, but treatment and transportation costs for this water are large.

  2. Northwest Power and Conservation Council Fish and Wildlife Project Funding Recommendations to the Bonneville Power Administration

    E-Print Network [OSTI]

    to the Bonneville Power Administration for Fiscal Years 2007 through 2009 October 2006 Programmatic Issues-based obligations into the broader Northwest Power Act program -- it is precisely the fact that Bonneville has to Bonneville that satisfy Bonneville's ESA-based objectives balanced with its broader Northwest Power Act

  3. StationaryEnvironment ResidentialTransportation Premium Power Advanced High Efficiency, Quick Start Fuel

    E-Print Network [OSTI]

    Premium Power Agenda STARTM (1999-2003) ­ Substrate based Transportation application Autothermal ReformerEnvironment Residential Stationary Premium Power STAR Fuel Processor · Autothermal reformer · Substrate-based catalysts

  4. Computer-Based Procedures for Field Workers in Nuclear Power Plants: Development of a Model of Procedure Usage and Identification of Requirements

    SciTech Connect (OSTI)

    Katya Le Blanc; Johanna Oxstrand

    2012-04-01T23:59:59.000Z

    The nuclear industry is constantly trying to find ways to decrease the human error rate, especially the human errors associated with procedure use. As a step toward the goal of improving procedure use performance, researchers, together with the nuclear industry, have been looking at replacing the current paper-based procedures with computer-based procedure systems. The concept of computer-based procedures is not new by any means; however most research has focused on procedures used in the main control room. Procedures reviewed in these efforts are mainly emergency operating procedures and normal operating procedures. Based on lessons learned for these previous efforts we are now exploring a more unknown application for computer based procedures - field procedures, i.e. procedures used by nuclear equipment operators and maintenance technicians. The Idaho National Laboratory and participants from the U.S. commercial nuclear industry are collaborating in an applied research effort with the objective of developing requirements and specifications for a computer-based procedure system to be used by field workers. The goal is to identify the types of human errors that can be mitigated by using computer-based procedures and how to best design the computer-based procedures to do so. This paper describes the development of a Model of Procedure Use and the qualitative study on which the model is based. The study was conducted in collaboration with four nuclear utilities and five research institutes. During the qualitative study and the model development requirements and for computer-based procedures were identified.

  5. Power superconducting power transmission cable

    DOE Patents [OSTI]

    Ashworth, Stephen P. (Cambridge, GB)

    2003-01-01T23:59:59.000Z

    The present invention is for a compact superconducting power transmission cable operating at distribution level voltages. The superconducting cable is a conductor with a number of tapes assembled into a subconductor. These conductors are then mounted co-planarly in an elongated dielectric to produce a 3-phase cable. The arrangement increases the magnetic field parallel to the tapes thereby reducing ac losses.

  6. Power Right. Power Smart. Efficient Computer Power Supplies and...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AC power that you get from your electric company into the DC power consumed by most electronics, including your computer. We expect our power supplies to be safe, reliable, and...

  7. Microsoft PowerPoint - Steve_Spinner

    Office of Environmental Management (EM)

    facilities 2.0 billion - for "front end" nuclear fuel cycle facilities 8.0 billion - coal based power generation, industrial gasification & carbon capture & sequestration...

  8. Nuclear power high technology colloquium: proceedings

    SciTech Connect (OSTI)

    Not Available

    1984-12-10T23:59:59.000Z

    Reports presenting information on technology advancements in the nuclear industry and nuclear power plant functions have been abstracted and are available on the energy data base.

  9. Silicon Valley Power and Oklahoma Municipal Power Authority Win...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Silicon Valley Power and Oklahoma Municipal Power Authority Win 2014 Public Power Wind Awards Silicon Valley Power and Oklahoma Municipal Power Authority Win 2014 Public Power Wind...

  10. Use of Air2Air Technology to Recover Fresh-Water from the Normal Evaporative Cooling Loss at Coal-Based Thermoelectric Power Plants

    SciTech Connect (OSTI)

    Ken Mortensen

    2009-06-30T23:59:59.000Z

    This program was undertaken to build and operate the first Air2Air{trademark} Water Conservation Cooling Tower at a power plant, giving a validated basis and capability for water conservation by this method. Air2Air{trademark} water conservation technology recovers a portion of the traditional cooling tower evaporate. The Condensing Module provides an air-to-air heat exchanger above the wet fill media, extracting the heat from the hot saturated moist air leaving in the cooling tower and condensing water. The rate of evaporate water recovery is typically 10%-25% annually, depending on the cooling tower location (climate).

  11. Tidal power

    SciTech Connect (OSTI)

    Hammons, T.J. (Glasgow Univ., Scotland (United Kingdom))

    1993-03-01T23:59:59.000Z

    The paper reviews the physics of tidal power considering gravitational effects of moon and sun; semidiurnal, diurnal, and mixed tides; and major periodic components that affect the tidal range. Shelving, funneling, reflection, and resonance phenomena that have a significant effect on tidal range are also discussed. The paper then examines tidal energy resource for principal developments estimated from parametric modeling in Europe and worldwide. Basic parameters that govern the design of tidal power schemes in terms of mean tidal range and surface area of the enclosed basin are identified. While energy extracted is proportional to the tidal amplitude squared, requisite sluicing are is proportional to the square root of the tidal amplitude. Sites with large tidal amplitudes are therefore best suited for tidal power developments, whereas sites with low tidal amplitudes have sluicing that may be prohibitive. It is shown that 48% of the European tidal resource is in the United Kingdom, 42% in France and 8% in Ireland, other countries having negligible potential. Worldwide tidal resource is identified. Tidal barrage design and construction using caissons is examined, as are alternative operating modes (single-action generation, outflow generation, flood generation, two-way generation, twin basin generation, pumping, etc), development trends and possibilities, generation cost at the barrage boundary, sensitivity to discount rates, general economics, and markets. Environmental effects, and institutional constraints to the development of tidal barrage schemes are also discussed.

  12. Energy Efficient Scheduling with Power Control for Wireless Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Energy Efficient Scheduling with Power Control for Wireless Networks Bastian Katz Institute the complexity of scheduling with power control in the SINRG model of interference. Based on a novel scheme without power control are also solutions if power control is possible, power control can be exploited

  13. Model Predictive Control for Smooth Distributed Power Adaptation

    E-Print Network [OSTI]

    Boyer, Edmond

    1 Model Predictive Control for Smooth Distributed Power Adaptation Virgile Garcia1,2,3 , Nikolai the variations of other BS powers. The trajectories are then updated using a Model Predictive Control (MPC-based power control, no inter-cell cooperation, power trajectory, model predictive control, smooth power

  14. Boosting Data Center Performance Through Non-Uniform Power Allocation

    E-Print Network [OSTI]

    Young, R. Michael

    Data center power management is evolving from ad hoc methods based on maximum node power usage capacity. A conservative power management ap- proach is to ensure the maximum power consumption of all, dynamic algorithm to manage power globally in server clusters with non-uniform workloads. #12;This

  15. 48 OCTOBER | 2010 Near Term Power PredicTioN

    E-Print Network [OSTI]

    Kusiak, Andrew

    48 OCTOBER | 2010 Near Term Power PredicTioN wiNd eNergy is becomiNg a sigNificaNT player are presented. The first model for power prediction is developed based on the power curve equation [1 equation, data-mining algorithms can be directly applied to predict the power based on parameters

  16. Maybe you've heard about The 7 Habits of Highly Effective People--the best-selling business book of all time. Now you have a chance to implement the 7 Habits in your life by attending an exciting three-day program based on the powerful book.

    E-Print Network [OSTI]

    Cui, Yan

    Maybe you've heard about The 7 Habits of Highly Effective People--the best-selling business book-day program based on the powerful book. The 7 Habits program is the most dynamic training for personal

  17. Low-Power Maximum Power Point Tracker with Digital Control for Thermophotovoltaic Generators

    E-Print Network [OSTI]

    Pilawa, Robert

    This paper describes the design, optimization, and evaluation of the power electronics circuitry for a low-power portable thermophotovotaic (TPV) generator system. TPV system is based on a silicon micro-reactor design and ...

  18. Cut Your Power Bills

    E-Print Network [OSTI]

    Greenwood, R. W.

    1979-01-01T23:59:59.000Z

    in lohich it was not at all obvious. If fuel and power factor adjustments are included, the equation becomes: M = $1650 + $3.948 BD + $0.20 rkVA + E ($0.0054 + FCA) The monthly bill is further increased, by 1%, unless the customer is served at 132 kV... and the National Energy Program, has mandated that states consider lifeline and marginal cost based rates. 3. Energy charges are based on those expenses that tend to vary with rate of electricity production such as fuel, operating labor and maintenance. Because...

  19. Wind power and Wind power and

    E-Print Network [OSTI]

    Wind power and the CDM #12; Wind power and the CDM Emerging practices in developing wind power 2005 Jyoti P. Painuly, Niels-Erik Clausen, Jørgen Fenhann, Sami Kamel and Romeo Pacudan #12; WIND POWER AND THE CDM Emerging practices in developing wind power projects for the Clean Development Mechanism Energy

  20. Ultra Low Power Bioelectronics Fundamentals, Biomedical Applications,

    E-Print Network [OSTI]

    Sarpeshkar, Rahul

    Ultra Low Power Bioelectronics Fundamentals, Biomedical Applications, and Bio-inspired Systems to articulate information-based principles for ultra-low-power design that apply to biology or to electronics of ultra- low-power electronics and bioelectronics is shown in the figure below. Engineering can aid

  1. Environmental externalities: Applying the concept to Asian coal-based power generation. [Includes external environmental and societal costs and methods of evaluating them

    SciTech Connect (OSTI)

    Szpunar, C.B.; Gillette, J.L.

    1993-03-01T23:59:59.000Z

    This report examines the concept of environmental externality. It discusses various factors -- the atmospheric transformations, relationship of point-source emissions to ambient air quality, dose-response relationships, applicable cause-and-effect principles, and risk and valuation research -- that are considered by a number of state utilities when they apply the environmental externality concept to energy resource planning. It describes a methodology developed by Argonne National Laboratory for general use in resource planning, in combination with traditional methods that consider the cost of electricity production. Finally, it shows how the methodology can be applied in Indonesia, Thailand, and Taiwan to potential coal-fired power plant projects that will make use of clean coal technologies.

  2. Power Recovery

    E-Print Network [OSTI]

    Murray, F.

    , will be the use of the ASTM Theoretical Steam Rate Tables. In addition, the author's experience regarding the minimum size for power recovery units that are economic in a Culf Coast plant will be presented. INTROD\\Jr.'rION When surveying an operation... will be discussed in detail. Each term in the equation will be considered in English units. Secondly, the use of Mollier diagrams to estimate the enthalphy change between the initial and final conditions will be considered. The last method, specific to steam...

  3. Yakama Power

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron SpinPrincetonUsingWhatY-12 recognized for ...BER/NERSCYakama Power May

  4. Fusion Power

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8,Dist.Newof EnergyFunding Opportunity fromFusion Links Fusion

  5. A Tariff for Reactive Power

    SciTech Connect (OSTI)

    Kueck, John D [ORNL; Kirby, Brendan J [ORNL; Li, Fangxing [ORNL; Tufon, Christopher [Pacific Gas and Electric Company; Isemonger, Alan [California Independent System Operator

    2008-07-01T23:59:59.000Z

    Two kinds of power are required to operate an electric power system: real power, measured in watts, and reactive power, measured in volt-amperes reactive or VARs. Reactive power supply is one of a class of power system reliability services collectively known as ancillary services, and is essential for the reliable operation of the bulk power system. Reactive power flows when current leads or lags behind voltage. Typically, the current in a distribution system lags behind voltage because of inductive loads such as motors. Reactive power flow wastes energy and capacity and causes voltage droop. To correct lagging power flow, leading reactive power (current leading voltage) is supplied to bring the current into phase with voltage. When the current is in phase with voltage, there is a reduction in system losses, an increase in system capacity, and a rise in voltage. Reactive power can be supplied from either static or dynamic VAR sources. Static sources are typically transmission and distribution equipment, such as capacitors at substations, and their cost has historically been included in the revenue requirement of the transmission operator (TO), and recovered through cost-of-service rates. By contrast, dynamic sources are typically generators capable of producing variable levels of reactive power by automatically controlling the generator to regulate voltage. Transmission system devices such as synchronous condensers can also provide dynamic reactive power. A class of solid state devices (called flexible AC transmission system devices or FACTs) can provide dynamic reactive power. One specific device has the unfortunate name of static VAR compensator (SVC), where 'static' refers to the solid state nature of the device (it does not include rotating equipment) and not to the production of static reactive power. Dynamic sources at the distribution level, while more costly would be very useful in helping to regulate local voltage. Local voltage regulation would reduce system losses, increase circuit capacity, increase reliability, and improve efficiency. Reactive power is theoretically available from any inverter-based equipment such as photovoltaic (PV) systems, fuel cells, microturbines, and adjustable-speed drives. However, the installation is usually only economical if reactive power supply is considered during the design and construction phase. In this report, we find that if the inverters of PV systems or the generators of combined heat and power (CHP) systems were designed with capability to supply dynamic reactive power, they could do this quite economically. In fact, on an annualized basis, these inverters and generators may be able to supply dynamic reactive power for about $5 or $6 per kVAR. The savings from the local supply of dynamic reactive power would be in reduced losses, increased capacity, and decreased transmission congestion. The net savings are estimated to be about $7 per kVAR on an annualized basis for a hypothetical circuit. Thus the distribution company could economically purchase a dynamic reactive power service from customers for perhaps $6/kVAR. This practice would provide for better voltage regulation in the distribution system and would provide an alternate revenue source to help amortize the cost of PV and CHP installations. As distribution and transmission systems are operated under rising levels of stress, the value of local dynamic reactive supply is expected to grow. Also, large power inverters, in the range of 500 kW to 1 MW, are expected to decrease in cost as they become mass produced. This report provides one data point which shows that the local supply of dynamic reactive power is marginally profitable at present for a hypothetical circuit. We expect that the trends of growing power flow on the existing system and mass production of inverters for distributed energy devices will make the dynamic supply of reactive power from customers an integral component of economical and reliable system operation in the future.

  6. The Political Economy of Wind Power in China

    E-Print Network [OSTI]

    Swanson, Ryan Landon

    2011-01-01T23:59:59.000Z

    wind power, while others may mandate daily operating limits or are based upon thresholds for the percentage of balancing

  7. 314 IEEE MICROWAVE AND GUIDED WAVE LETTERS, VOL. 9, NO. 8, AUGUST 1999 39-GHz GaN-Based Microwave Power

    E-Print Network [OSTI]

    York, Robert A.

    314 IEEE MICROWAVE AND GUIDED WAVE LETTERS, VOL. 9, NO. 8, AUGUST 1999 3­9-GHz GaN-Based Microwave. P. Keller, and U. K. Mishra, Fellow, IEEE Abstract--We present an initial demonstration of GaN-band network. Using 0.7-m gate-length GaN high-electron-mobility transistors (HEMT's) with current

  8. Power management system

    DOE Patents [OSTI]

    Algrain, Marcelo C. (Peoria, IL); Johnson, Kris W. (Washington, IL); Akasam, Sivaprasad (Peoria, IL); Hoff, Brian D. (East Peoria, IL)

    2007-10-02T23:59:59.000Z

    A method of managing power resources for an electrical system of a vehicle may include identifying enabled power sources from among a plurality of power sources in electrical communication with the electrical system and calculating a threshold power value for the enabled power sources. A total power load placed on the electrical system by one or more power consumers may be measured. If the total power load exceeds the threshold power value, then a determination may be made as to whether one or more additional power sources is available from among the plurality of power sources. At least one of the one or more additional power sources may be enabled, if available.

  9. Solar powered desalination system

    E-Print Network [OSTI]

    Mateo, Tiffany Alisa

    2011-01-01T23:59:59.000Z

    2008, uses concentrated solar power to split water. Figurethe main reason the potential for solar power is boundless.a clean energy source, solar power is inexhaustible, fairly

  10. ELECTROCHEMICAL POWER FOR TRANSPORTATION

    E-Print Network [OSTI]

    Cairns, Elton J.

    2012-01-01T23:59:59.000Z

    electric power generating plant, and the distributionrequired on the power-generating plant and not on the vehi-in either power-generating plants or combustion engines,

  11. Southwestern Power Administration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Courses Instructors NERC Continuing Education Power Operations Training Center You'll find the "Power" of learning at Southwestern's Power Operations Training Center (POTC). POTC's...

  12. POWER PURCHASE AGREEMENT DELMARVA POWER & LIGHT COMPANY

    E-Print Network [OSTI]

    Firestone, Jeremy

    POWER PURCHASE AGREEMENT between DELMARVA POWER & LIGHT COMPANY ("Buyer") and BLUEWATER WIND 3.5 Energy Forecasts, Scheduling and Balancing.......................................... 39 3

  13. EVALUATION OF THE EMISSION, TRANSPORT, AND DEPOSITION OF MERCURY, FINE PARTICULATE MATTER, AND ARSENIC FROM COAL-BASED POWER PLANTS IN THE OHIO RIVER VALLEY REGION

    SciTech Connect (OSTI)

    Kevin Crist

    2004-04-02T23:59:59.000Z

    Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc. (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NOx, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal-fired power plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg{sup 0}, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley Region, operated independently of this project. These sites may include (1) the DOE National Energy Technology Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by U.S. EPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.

  14. Enhanced optical power of GaN-based light-emitting diode with compound photonic crystals by multiple-exposure nanosphere-lens lithography

    SciTech Connect (OSTI)

    Zhang, Yonghui; Wei, Tongbo, E-mail: tbwei@semi.ac.cn; Xiong, Zhuo; Shang, Liang; Tian, Yingdong; Zhao, Yun; Zhou, Pengyu; Wang, Junxi; Li, Jinmin [Semiconductor Lighting Technology Research and Development Center, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 (China)

    2014-07-07T23:59:59.000Z

    The light-emitting diodes (LEDs) with single, twin, triple, and quadruple photonic crystals (PCs) on p-GaN are fabricated by multiple-exposure nanosphere-lens lithography (MENLL) process utilizing the focusing behavior of polystyrene spheres. Such a technique is easy and economical for use in fabricating compound nano-patterns. The optimized tilted angle is decided to be 26.6° through mathematic calculation to try to avoid the overlay of patterns. The results of scanning electron microscopy and simulations reveal that the pattern produced by MENLL is a combination of multiple ovals. Compared to planar-LED, the light output power of LEDs with single, twin, triple, and quadruple PCs is increased by 14.78%, 36.03%, 53.68%, and 44.85% under a drive current 350?mA, respectively. Furthermore, all PC-structures result in no degradation of the electrical properties. The stimulated results indicate that the highest light extraction efficiency of LED with the clover-shape triple PC is due to the largest scattering effect on propagation of light from GaN into air.

  15. Power oscillator

    DOE Patents [OSTI]

    Gitsevich, Aleksandr (Montgomery Village, MD)

    2001-01-01T23:59:59.000Z

    An oscillator includes an amplifier having an input and an output, and an impedance transformation network connected between the input of the amplifier and the output of the amplifier, wherein the impedance transformation network is configured to provide suitable positive feedback from the output of the amplifier to the input of the amplifier to initiate and sustain an oscillating condition, and wherein the impedance transformation network is configured to protect the input of the amplifier from a destructive feedback signal. One example of the oscillator is a single active element device capable of providing over 70 watts of power at over 70% efficiency. Various control circuits may be employed to match the driving frequency of the oscillator to a plurality of tuning states of the lamp.

  16. Over-Current Protection Scheme for SiC Power MOSFET DC Circuit Breaker

    E-Print Network [OSTI]

    Zhang, Yuan; Liang, Yung C.

    2015-01-01T23:59:59.000Z

    V. Radun, “SiC based solid state power controller,” in 23tha solid-state circuit breaker based on SiC power MOSFET withSolid-state DC circuit breakers made of the modern wide bandgap power

  17. EVALUATION OF THE EMISSION, TRANSPORT, AND DEPOSITION OF MERCURY, FINE PARTICULATE MATTER, AND ARSENIC FROM COAL-BASED POWER PLANTS IN THE OHIO RIVER VALLEY REGION

    SciTech Connect (OSTI)

    Kevin Crist

    2005-04-02T23:59:59.000Z

    Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NO{sub x}, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately of 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg{sup 0}, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by U.S. EPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.

  18. EVALUATION OF THE EMISSION, TRANSPORT, AND DEPOSITION OF MERCURY, FINE PARTICULATE MATTER, AND ARSENIC FROM COAL-BASED POWER PLANTS IN THE OHIO RIVER VALLEY REGION

    SciTech Connect (OSTI)

    Kevin Crist

    2004-10-02T23:59:59.000Z

    Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NOx, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately of 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg{sup 0}, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by U.S. EPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.

  19. EVALUATION OF THE EMISSION, TRANSPORT, AND DEPOSITION OF MERCURY, FINE PARTICULATE MATTER, AND ARSENIC FROM COAL-BASED POWER PLANTS IN THE OHIO RIVER VALLEY REGION

    SciTech Connect (OSTI)

    Kevin Crist

    2003-10-02T23:59:59.000Z

    Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NO{sub x}, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately of 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg{sup 0}, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley Region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by U.S. EPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley Region.

  20. Evaluation of the Emission, Transport, and Deposition of Mercury, Fine Particulate Matter, and Arsenic from Coal-Based Power Plants in the Ohio River Valley Region

    SciTech Connect (OSTI)

    Kevin Crist

    2006-04-02T23:59:59.000Z

    As stated in the proposal: Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NO{sub x}, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg0 and RGM. Approximately 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg{sup 0}, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by the USEPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.