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Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

A Simulation Model for Evaluating Distributed Systems Dependability  

E-Print Network [OSTI]

In this paper we present a new simulation model designed to evaluate the dependability in distributed systems. This model extends the MONARC simulation model with new capabilities for capturing reliability, safety, availability, security, and maintainability requirements. The model has been implemented as an extension of the multithreaded, process oriented simulator MONARC, which allows the realistic simulation of a wide-range of distributed system technologies, with respect to their specific components and characteristics. The extended simulation model includes the necessary components to inject various failure events, and provides the mechanisms to evaluate different strategies for replication, redundancy procedures, and security enforcement mechanisms, as well. The results obtained in simulation experiments presented in this paper probe that the use of discrete-event simulators, such as MONARC, in the design and development of distributed systems is appealing due to their efficiency and scalability.

Dobre, Ciprian; Cristea, Valentin

2012-01-01T23:59:59.000Z

2

Use of parameter adjustment techniques in the simulation of multi-echelon inventory/distribution system  

E-Print Network [OSTI]

USE OF PARAMETER ADJUSTI4IENT TECHNIQUES IN THE SIMULATION OF A 11ULTI-ECHELON INVENTORY/DISTRIBUTION SYSTEM A Thesis by THOMAS JOHN DER TATEVASION Submitted to the Graduate College of Texas ARM University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE August 1981 Major Subject: Industrial Engineering USE OF PARAMETER ADJUSTMENT TECHNIQUES IN THE SIMULATION OF A MULTI-ECHELOI'I INVENTORY/DISTRIBUTION SYSTEM A Thes1s by THOMAS JOHN DER TATEVASION...

Der Tatevasion, Thomas John

1981-01-01T23:59:59.000Z

3

Harmonic propagation on an electric distribution system: Field measurements compared with computer simulation  

SciTech Connect (OSTI)

Power electronic loads are occupying an increasing fraction of the total load on distribution feeders. Coincidentally, there is a greater use of power factor correction capacitors on the distribution system. These two factors can present poor operating conditions in the form of high harmonic levels propagating through a distribution system. Electric utility engineers are facing an ever increasing number of situations which require the analysis of the propagation of harmonics on a distribution system. HARMFLO was developed by EPRI for use in the analysis of harmonics on a power system. However, for a typical analysis of a distribution system, data for some of the parameters required by HARMFLO are not available. Furthermore, exact load information is usually not available. Harmonic levels determined from field tests on a distribution system are compared to results of HARMFLO simulations to determine if this analysis tool can be expected to provide useful results despite the lack of exact information for load modeling and other system parameters.

Williams, S.M. (Naval Postgraduate School, Monterey, CA (United States)); Brownfield, G.T. (Union Electric Co., St. Louis, MO (United States)); Duffus, J.W. (Univ. of Missouri, Columbia, MO (United States). Power Electronics Research Center)

1993-04-01T23:59:59.000Z

4

Using Simulation Models for District Chilled Water Distribution Systems Design  

E-Print Network [OSTI]

the design. The focus of this paper is to demonstrate how the using of the computerized simulation model can give the engineer the ability to explore many more alternative design scenarios and to identify more cost-effective and robust designs. The University...

Chen, Q.; Xu, C.; Deng, S.; Claridge, D. E.; Turner, W. D.

2004-01-01T23:59:59.000Z

5

Simulation of energy performance of underfloor air distribution (UFAD) systems  

E-Print Network [OSTI]

system represents a fan coil unit (FCU) system, consistingEnergy use intensity EUI Fan coil unit F CU HVAC electricityarea Fan powered terminal unit (with heating coil) used for

2009-01-01T23:59:59.000Z

6

Experiment and Simulation of Dynamic Voltage Regulation in Multiple Distributed Energy Resources Systems  

SciTech Connect (OSTI)

Distributed energy (DE) resources are power sources located near load centers and equipped with power electronics converters to interface with the grid, therefore it is feasible for DE to provide reactive power (along with active power) locally for dynamic voltage regulation. In this paper, a synchronous condenser and a microturbine with an inverter interface are implemented in parallel in a distribution system to regulate the local voltage. Developed voltage control schemes for the inverter and the synchronous condenser are presented. Experimental results show that both the inverter and the synchronous condenser can regulate the local voltage instantaneously although the dynamic response of the inverter is much faster than the synchronous condenser. In a system with multiple DEs performing local voltage regulation, the interaction between the DEs is studied. The simulation results show the relationship between the voltages in the system and the reactive power required for the voltage regulation. Also, integrated voltage regulation (multiple DEs performing voltage regulation) can increase the voltage regulation capability of DEs and reduce the capital and operating costs.

Xu, Yan [ORNL; Li, Fangxing [ORNL; Kueck, John D [ORNL; Rizy, D Tom [ORNL

2007-01-01T23:59:59.000Z

7

A Simulation Framework for Design of Mixed Time/Event-Triggered Distributed Control Systems  

E-Print Network [OSTI]

not fit into the strict periodic framework [13]. These CPS control systems often consist of both TT and ET- grate, and simulate all parts together is essential for design space exploration during early

Koutsoukos, Xenofon D.

8

Service and Utility Oriented Distributed Computing Systems: Challenges and Opportunities for Modeling and Simulation Communities  

E-Print Network [OSTI]

1 Service and Utility Oriented Distributed Computing Systems: Challenges and Opportunities) networks have emerged as popular platforms for the next generation parallel and distributed computing. Utility computing is envisioned to be the next generation of IT evolution that depicts how computing needs

Buyya, Rajkumar

9

Simulating the Daylight Performance of Complex Fenestration Systems Using Bidirectional Scattering Distribution Functions within Radiance  

SciTech Connect (OSTI)

We describe two methods which rely on bidirectional scattering distribution functions (BSDFs) to model the daylighting performance of complex fenestration systems (CFS), enabling greater flexibility and accuracy in evaluating arbitrary assemblies of glazing, shading, and other optically-complex coplanar window systems. Two tools within Radiance enable a) efficient annual performance evaluations of CFS, and b) accurate renderings of CFS despite the loss of spatial resolution associated with low-resolution BSDF datasets for inhomogeneous systems. Validation, accuracy, and limitations of the methods are discussed.

Ward, Gregory; Mistrick, Ph.D., Richard; Lee, Eleanor; McNeil, Andrew; Jonsson, Ph.D., Jacob

2011-01-21T23:59:59.000Z

10

Towards understanding tree root profiles: simulating hydrologically optimal strategies for root distribution Hydrology and Earth System Sciences, 5(4), 629644 (2001) EGS  

E-Print Network [OSTI]

Towards understanding tree root profiles: simulating hydrologically optimal strategies for root distribution 629 Hydrology and Earth System Sciences, 5(4), 629­644 (2001) © EGS Towards understanding tree root profiles: simulating hydrologically optimal strategies for root distribution M.T. van Wijk and W

Boyer, Edmond

11

Distributed Energy Technology Simulator: Microturbine Demonstration...  

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

Simulator: Microturbine Demonstration, October 2001 Distributed Energy Technology Simulator: Microturbine Demonstration, October 2001 This 2001 paper discusses the National Rural...

12

Agent-Based Simulation of Distribution Systems with High Penetration of Photovoltaic Generation  

E-Print Network [OSTI]

of strategic trading in restructured wholesale power markets with congestion managed by locational marginal when coupled with increased price-sensitivity of demand as realized through demand response, demand dispatch, and/or price-sensitive demand bidding. Index Terms--Distributed power generation, multiagent sys

Tesfatsion, Leigh

13

Simulation and analysis of distributed systems in Francesco Calzolai and Michele Loreti  

E-Print Network [OSTI]

Klaim systems we use SAM (Stochastic Analyser for Mobility). This is a command-line tool that provideKlaim is a stochastic extension of Klaim specifically thought to fa- cilitate the incorporation of random phenomena of random phenomena in models for network- aware computing a stochastic extension of Klaim [8,4], named Sto

Boyer, Edmond

14

Main Injector power distribution system  

SciTech Connect (OSTI)

The paper describes a new power distribution system for Fermilab's Main Injector. The system provides 13.8 kV power to Main Injector accelerator (accelerator and conventional loads) and is capable of providing power to the rest of the laboratory (backfeed system). Design criteria, and features including simulation results are given.

Cezary Jach and Daniel Wolff

2002-06-03T23:59:59.000Z

15

Distributed Theorem Proving for Distributed Hybrid Systems  

E-Print Network [OSTI]

system with a varying number of arbitrarily many cars. 1 Introduction Hybrid systems with joint discrete a multi-agent system, e.g., distributed car control systems. Such systems form distributed hybrid systemsDistributed Theorem Proving for Distributed Hybrid Systems David W. Renshaw, Sarah M. Loos

Platzer, Andr

16

FRIB cryogenic distribution system  

SciTech Connect (OSTI)

The Michigan State University Facility for Rare Isotope Beams (MSU-FRIB) helium distribution system has been revised to include bayonet/warm valve type disconnects between each cryomodule and the transfer line distribution system, similar to the Thomas Jefferson National Accelerator Facility (JLab) and the Spallation Neutron Source (SNS) cryogenic distribution systems. The heat loads at various temperature levels and some of the features in the design of the distribution system are outlined. The present status, the plans for fabrication, and the procurement approach for the helium distribution system are also included.

Ganni, Venkatarao [JLAB; Dixon, Kelly D. [JLAB; Laverdure, Nathaniel A. [JLAB; Knudsen, Peter N. [JLAB; Arenius, Dana M. [JLAB; Barrios, Matthew N. [Michigan State; Jones, S. [Michigan State; Johnson, M. [Michigan State; Casagrande, Fabio [Michigan State

2014-01-01T23:59:59.000Z

17

FRIB cryogenic distribution system  

SciTech Connect (OSTI)

The Michigan State University Facility for Rare Isotope Beams (MSU-FRIB) helium distribution system has been revised to include bayonet/warm valve type disconnects between each cryomodule and the transfer line distribution system, similar to the Thomas Jefferson National Accelerator Facility (JLab) and the Spallation Neutron Source (SNS) cryogenic distribution systems. The heat loads at various temperature levels and some of the features in the design of the distribution system are outlined. The present status, the plans for fabrication, and the procurement approach for the helium distribution system are also included.

Ganni, V.; Dixon, K.; Laverdure, N.; Knudsen, P.; Arenius, D. [Thomas Jefferson National Accelerator Facility (JLab), Newport News, VA 23606 (United States); Barrios, M.; Jones, S.; Johnson, M.; Casagrande, F. [Facility for Rare Isotope Beams (FRIB), Michigan State University, East Lansing, MI 48824 (United States)

2014-01-29T23:59:59.000Z

18

Cooling water distribution system  

DOE Patents [OSTI]

A passive containment cooling system for a nuclear reactor containment vessel. Disclosed is a cooling water distribution system for introducing cooling water by gravity uniformly over the outer surface of a steel containment vessel using an interconnected series of radial guide elements, a plurality of circumferential collector elements and collector boxes to collect and feed the cooling water into distribution channels extending along the curved surface of the steel containment vessel. The cooling water is uniformly distributed over the curved surface by a plurality of weirs in the distribution channels.

Orr, Richard (Pittsburgh, PA)

1994-01-01T23:59:59.000Z

19

High performance distributed simulation for interactive simulated vascular reconstruction  

E-Print Network [OSTI]

performance. 1 Introduction Interactive simulation environments are dynamic systems that combine simula- tion.1 Performance of interactive simulation environments The most important factor in the performance of a dynamic dynamic simulation environment. 1 1 2 2 3 visualization rendering simulation time rendering delay

Amsterdam, Universiteit van

20

Distribution System Voltage Regulation by Distributed Energy Resources  

SciTech Connect (OSTI)

This paper proposes a control method to regulate voltages in 3 phase unbalanced electrical distribution systems. A constrained optimization problem to minimize voltage deviations and maximize distributed energy resource (DER) active power output is solved by harmony search algorithm. IEEE 13 Bus Distribution Test System was modified to test three different cases: a) only voltage regulator controlled system b) only DER controlled system and c) both voltage regulator and DER controlled system. The simulation results show that systems with both voltage regulators and DER control provide better voltage profile.

Ceylan, Oguzhan [ORNL; Liu, Guodong [ORNL; Xu, Yan [ORNL; Tomsovic, Kevin [University of Tennessee, Knoxville (UTK)

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

WATER DISTRIBUTION SYSTEM OPERATION: APPLICATION OF  

E-Print Network [OSTI]

CHAPTER 5 WATER DISTRIBUTION SYSTEM OPERATION: APPLICATION OF SIMULATED ANNEALING Fred E. Goldman Arizona State University, Tempe, Arizona 5.1 INTRODUCTION The operation of water distribution systems affects the water quality in these systems. EPA regulations require that water quality be maintained

Mays, Larry W.

22

preprint; to appear in IEEE Systems Journal special issue on Complex Systems Estimating propagation and distribution of load shed in simulations of cascading  

E-Print Network [OSTI]

, and maintaining high reliability is especially important as the electric power infrastructure is being transformed mechanisms in power systems by which components tripping or failures cause further compo- nents tripping [1 of electric power systems. The average propagation of the simulated load shed data is estimated

Dobson, Ian

23

Building diagnosable distributed systems  

E-Print Network [OSTI]

Building diagnosable distributed systems Petros Maniatis Intel Research Berkeley ICSI ­ Security] Project response@R (R, K, SI) lookup response Specification #12;2/8/2006 Petros Maniatis9 Strawman Design Join lookup.NI == node.NI Join lookup.NI == succ.NI Select K in (N, S] Project response@R (R, K, SI

Maniatis, Petros

24

Distributed Optimization System  

DOE Patents [OSTI]

A search system and method for controlling multiple agents to optimize an objective using distributed sensing and cooperative control. The search agent can be one or more physical agents, such as a robot, and can be software agents for searching cyberspace. The objective can be: chemical sources, temperature sources, radiation sources, light sources, evaders, trespassers, explosive sources, time dependent sources, time independent sources, function surfaces, maximization points, minimization points, and optimal control of a system such as a communication system, an economy, a crane, and a multi-processor computer.

Hurtado, John E. (Albuquerque, NM); Dohrmann, Clark R. (Albuquerque, NM); Robinett, III, Rush D. (Tijeras, NM)

2004-11-30T23:59:59.000Z

25

Distributed computing systems programme  

SciTech Connect (OSTI)

Publication of this volume coincides with the completion of the U.K. Science and Engineering Research Council's coordinated programme of research in Distributed Computing Systems (DCS) which ran from 1977 to 1984. The volume is based on presentations made at the programme's final conference. The first chapter explains the origins and history of DCS and gives an overview of the programme and its achievements. The remaining sixteen chapters review particular research themes (including imperative and declarative languages, and performance modelling), and describe particular research projects in technical areas including local area networks, design, development and analysis of concurrent systems, parallel algorithm design, functional programming and non-von Neumann computer architectures.

Duce, D.

1984-01-01T23:59:59.000Z

26

Distributing MCell Simulations on the Grid  

E-Print Network [OSTI]

Distributing MCell Simulations on the Grid Henri Casanova casanova@cs.ucsd.edu Tom Bartol The Computational Grid [21] is a promising platform for the deployment of large-scale scientific and engineering that structure, PSAs are particularly well suited to the Grid infrastructure and can be deployed on very large

Sejnowski, Terrence J.

27

Quality monitored distributed voting system  

DOE Patents [OSTI]

A quality monitoring system can detect certain system faults and fraud attempts in a distributed voting system. The system uses decoy voters to cast predetermined check ballots. Absent check ballots can indicate system faults. Altered check ballots can indicate attempts at counterfeiting votes. The system can also cast check ballots at predetermined times to provide another check on the distributed voting system. 6 figs.

Skogmo, D.

1997-03-18T23:59:59.000Z

28

Distributed road assessment system  

DOE Patents [OSTI]

A system that detects damage on or below the surface of a paved structure or pavement is provided. A distributed road assessment system includes road assessment pods and a road assessment server. Each road assessment pod includes a ground-penetrating radar antenna array and a detection system that detects road damage from the return signals as the vehicle on which the pod is mounted travels down a road. Each road assessment pod transmits to the road assessment server occurrence information describing each occurrence of road damage that is newly detected on a current scan of a road. The road assessment server maintains a road damage database of occurrence information describing the previously detected occurrences of road damage. After the road assessment server receives occurrence information for newly detected occurrences of road damage for a portion of a road, the road assessment server determines which newly detected occurrences correspond to which previously detected occurrences of road damage.

Beer, N. Reginald; Paglieroni, David W

2014-03-25T23:59:59.000Z

29

Onsite Wastewater Treatment Systems: Spray Distribution System  

E-Print Network [OSTI]

Spray distribution systems for wastewater are much like lawn sprinkler systems, in that they spray treated wastewater over the surface of a yard. This publication explains how spray distribution systems work, what their design requirements are...

Lesikar, Bruce J.

2008-10-23T23:59:59.000Z

30

Evaluation of Residential Hot Water Distribution Ssytems by Numeric Simulation  

SciTech Connect (OSTI)

The objective of this project was to evaluate the performance and economics of various domestic hot water distribution systems in representative California residences. While the greatest opportunities for improved efficiency occur in new construction, significant improvements can also be made in some existing distribution systems. Specific objectives of the project tasks were: (1) Simulate potential energy savings of, perform cost-benefit analyses of, and identify market barriers to alternative new systems. (2) Simulate potential energy savings of, perform cost-benefit analyses of, and identify market barriers to maintenance, repair, and retrofit modifications of existing systems. (3) Evaluate potential impact of adopting alternative hot water distribution systems and report project findings. The outcome of this project is to provide homeowners, homebuilders, systems suppliers, municipal code officials and utility providers (both electric and water/sewer) with a neutral, independent, third party, cost-benefit analysis of alternative hot water distribution systems for use in California. The results will enable these stakeholders to make informed decisions regarding which system is most appropriate for use.

Wendt, ROBERT

2005-08-17T23:59:59.000Z

31

Causality and sensitivity analysis in distributed design simulation  

E-Print Network [OSTI]

Numerous collaborative design frameworks have been developed to accelerate the product development, and recently environments for building distributed simulations have been proposed. For example, a simulation framework ...

Kim, Jaehyun, 1970-

2002-01-01T23:59:59.000Z

32

Measuring Advances in HVAC Distribution System Design  

SciTech Connect (OSTI)

Substantial commercial building energy savings have been achieved by improving the performance of the HV AC distribution system. The energy savings result from distribution system design improvements, advanced control capabilities, and use of variable-speed motors. Yet, much of the commercial building stock remains equipped with inefficient systems. Contributing to this is the absence of a definition for distribution system efficiency as well as the analysis methods for quantifying performance. This research investigates the application of performance indices to assess design advancements in commercial building thermal distribution systems. The index definitions are based on a first and second law of thermodynamics analysis of the system. The second law or availability analysis enables the determination of the true efficiency of the system. Availability analysis is a convenient way to make system efficiency comparisons since performance is evaluated relative to an ideal process. A TRNSYS simulation model is developed to analyze the performance of two distribution system types, a constant air volume system and a variable air volume system, that serve one floor of a large office building. Performance indices are calculated using the simulation results to compare the performance of the two systems types in several locations. Changes in index values are compared to changes in plant energy, costs, and carbon emissions to explore the ability of the indices to estimate these quantities.

Franconi, E.

1998-05-01T23:59:59.000Z

33

Simulating neural systems with Xyce.  

SciTech Connect (OSTI)

Sandia's parallel circuit simulator, Xyce, can address large scale neuron simulations in a new way extending the range within which one can perform high-fidelity, multi-compartment neuron simulations. This report documents the implementation of neuron devices in Xyce, their use in simulation and analysis of neuron systems.

Schiek, Richard Louis; Thornquist, Heidi K.; Mei, Ting; Warrender, Christina E.; Aimone, James Bradley; Teeter, Corinne; Duda, Alex M. [University of Illinois, Urbana-Champaign

2012-12-01T23:59:59.000Z

34

Measuring Advances in HVAC Distribution System Design  

E-Print Network [OSTI]

Advances in HV AC Distribution System Design Ellen FranconiAdvances in HVAC Distribution System Design Ellen Franconisavings result from distribution system design improvements,

Franconi, E.

2011-01-01T23:59:59.000Z

35

Simulation of open quantum systems  

E-Print Network [OSTI]

We present an approach for the semiclassical treatment of open quantum systems. An expansion into localized states allows restriction of a simulation to a fraction of the environment that is located within a predefined vicinity of the system. Adding and dropping environmental particles during the simulation yields an effective reduction of the size of the system that is being treated.

Florian Mintert; Eric J. Heller

2008-03-27T23:59:59.000Z

36

Distributed expert systems for nuclear reactor control  

SciTech Connect (OSTI)

A network of distributed expert systems is the heart of a prototype supervisory control architecture developed at the Oak Ridge National Laboratory (ORNL) for an advanced multimodular reactor. Eight expert systems encode knowledge on signal acquisition, diagnostics, safeguards, and control strategies in a hybrid rule-based, multiprocessing and object-oriented distributed computing environment. An interactive simulation of a power block consisting of three reactors and one turbine provides a realistic, testbed for performance analysis of the integrated control system in real-time. Implementation details and representative reactor transients are discussed.

Otaduy, P.J.

1992-12-01T23:59:59.000Z

37

Distributed expert systems for nuclear reactor control  

SciTech Connect (OSTI)

A network of distributed expert systems is the heart of a prototype supervisory control architecture developed at the Oak Ridge National Laboratory (ORNL) for an advanced multimodular reactor. Eight expert systems encode knowledge on signal acquisition, diagnostics, safeguards, and control strategies in a hybrid rule-based, multiprocessing and object-oriented distributed computing environment. An interactive simulation of a power block consisting of three reactors and one turbine provides a realistic, testbed for performance analysis of the integrated control system in real-time. Implementation details and representative reactor transients are discussed.

Otaduy, P.J.

1992-01-01T23:59:59.000Z

38

Development of an Integrated Distribution Management System  

SciTech Connect (OSTI)

This final report details the components, functionality, costs, schedule and benefits of developing an Integrated Distribution Management System (IDMS) for power distribution system operation. The Distribution Automation (DA) and Supervisory Control and Data Acquisition (SCADA) systems used by electric power companies to manage the distribution of electric power to retail energy consumers are vital components of the Nations critical infrastructure. Providing electricity is an essential public service and a disruption in that service, if not quickly restored, could threaten the public safety and the Nations economic security. Our Nations economic prosperity and quality of life have long depended on the essential services that utilities provide; therefore, it is necessary to ensure that electric utilities are able to conduct their operations safely and efficiently. A fully integrated technology of applications is needed to link various remote sensing, communications and control devices with other information tools that help guide Power Distribution Operations personnel. A fully implemented IDMS will provide this, a seamlessly integrated set of applications to raise electric system operating intelligence. IDMS will enhance DA and SCADA through integration of applications such as Geographic Information Systems, Outage Management Systems, Switching Management and Analysis, Operator Training Simulator, and other Advanced Applications, including unbalanced load flow and fault isolation/service restoration. These apps are capable of utilizing and obtaining information from appropriately installed DER, and by integrating disparate systems, the Distribution Operators will benefit from advanced capabilities when analyzing, controlling and operating the electric system.

Schatz, Joe E.

2010-10-20T23:59:59.000Z

39

Simulation framework for intelligent transportation systems  

SciTech Connect (OSTI)

A simulation framework has been developed for a large-scale, comprehensive, scaleable simulation of an Intelligent Transportation System (ITS). The simulator is designed for running on parallel computers and distributed (networked) computer systems, but can run on standalone workstations for smaller simulations. The simulator currently models instrumented smart vehicles with in-vehicle navigation units capable of optimal route planning and Traffic Management Centers (TMC). The TMC has probe vehicle tracking capabilities (display position and attributes of instrumented vehicles), and can provide two-way interaction with traffic to provide advisories and link times. Both the in-vehicle navigation module and the TMC feature detailed graphical user interfaces to support human-factors studies. Realistic modeling of variations of the posted driving speed are based on human factors studies that take into consideration weather, road conditions, driver personality and behavior, and vehicle type. The prototype has been developed on a distributed system of networked UNIX computers but is designed to run on parallel computers, such as ANL`s IBM SP-2, for large-scale problems. A novel feature of the approach is that vehicles are represented by autonomous computer processes which exchange messages with other processes. The vehicles have a behavior model which governs route selection and driving behavior, and can react to external traffic events much like real vehicles. With this approach, the simulation is scaleable to take advantage of emerging massively parallel processor (MPP) systems.

Ewing, T.; Doss, E.; Hanebutte, U.; Tentner, A.

1996-10-01T23:59:59.000Z

40

Communication Simulations for Power System Applications  

SciTech Connect (OSTI)

New smart grid technologies and concepts, such as dynamic pricing, demand response, dynamic state estimation, and wide area monitoring, protection, and control, are expected to require considerable communication resources. As the cost of retrofit can be high, future power grids will require the integration of high-speed, secure connections with legacy communication systems, while still providing adequate system control and security. While considerable work has been performed to create co-simulators for the power domain with load models and market operations, limited work has been performed in integrating communications directly into a power domain solver. The simulation of communication and power systems will become more important as the two systems become more inter-related. This paper will discuss ongoing work at Pacific Northwest National Laboratory to create a flexible, high-speed power and communication system co-simulator for smart grid applications. The framework for the software will be described, including architecture considerations for modular, high performance computing and large-scale scalability (serialization, load balancing, partitioning, cross-platform support, etc.). The current simulator supports the ns-3 (telecommunications) and GridLAB-D (distribution systems) simulators. Ongoing and future work will be described, including planned future expansions for a traditional transmission solver. A test case using the co-simulator, utilizing a transactive demand response system created for the Olympic Peninsula and AEP gridSMART demonstrations, requiring two-way communication between distributed and centralized market devices, will be used to demonstrate the value and intended purpose of the co-simulation environment.

Fuller, Jason C.; Ciraci, Selim; Daily, Jeffrey A.; Fisher, Andrew R.; Hauer, Matthew L.

2013-05-29T23:59:59.000Z

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

MAPPING HVAC SYSTEMS FOR SIMULATION IN ENERGYPLUS  

E-Print Network [OSTI]

LBNL-XXXXX MAPPING HVAC SYSTEMS FOR SIMULATION IN ENERGYPLUSof California. MAPPING HVAC SYSTEMS FOR SIMULATION INpresent a conventional view of HVAC systems to the user, and

Basarkar, Mangesh

2013-01-01T23:59:59.000Z

42

Constructing Reliable Distributed Communication Systems with CORBA  

E-Print Network [OSTI]

Constructing Reliable Distributed Communication Systems with CORBA Silvano Maffeis Douglas C model to support reliable data- and process- oriented distributed systems that communicate through syn distributed object computing systems with CORBA. First, we examine the question of whether reliable applica

Schmidt, Douglas C.

43

Argonne simulation framework for intelligent transportation systems  

SciTech Connect (OSTI)

A simulation framework has been developed which defines a high-level architecture for a large-scale, comprehensive, scalable simulation of an Intelligent Transportation System (ITS). The simulator is designed to run on parallel computers and distributed (networked) computer systems; however, a version for a stand alone workstation is also available. The ITS simulator includes an Expert Driver Model (EDM) of instrumented ``smart`` vehicles with in-vehicle navigation units. The EDM is capable of performing optimal route planning and communicating with Traffic Management Centers (TMC). A dynamic road map data base is sued for optimum route planning, where the data is updated periodically to reflect any changes in road or weather conditions. The TMC has probe vehicle tracking capabilities (display position and attributes of instrumented vehicles), and can provide 2-way interaction with traffic to provide advisories and link times. Both the in-vehicle navigation module and the TMC feature detailed graphical user interfaces that includes human-factors studies to support safety and operational research. Realistic modeling of variations of the posted driving speed are based on human factor studies that take into consideration weather, road conditions, driver`s personality and behavior and vehicle type. The simulator has been developed on a distributed system of networked UNIX computers, but is designed to run on ANL`s IBM SP-X parallel computer system for large scale problems. A novel feature of the developed simulator is that vehicles will be represented by autonomous computer processes, each with a behavior model which performs independent route selection and reacts to external traffic events much like real vehicles. Vehicle processes interact with each other and with ITS components by exchanging messages. With this approach, one will be able to take advantage of emerging massively parallel processor (MPP) systems.

Ewing, T.; Doss, E.; Hanebutte, U.; Canfield, T.; Brown-VanHoozer, A.; Tentner, A.

1996-04-01T23:59:59.000Z

44

Nuclear Systems Modeling & Simulation | More Science | ORNL  

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

Systems Modeling and Simulation SHARE Nuclear Systems Modeling and Simulation Reactor physics depletion model for the Advanced Test Reactor Reactor physics depletion model for the...

45

Nuclear Systems Modeling, Simulation & Validation | ORNL  

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

Systems Modeling and Simulation SHARE Nuclear Systems Modeling, Simulation and Validation Reactor physics depletion model for the Advanced Test Reactor Reactor physics depletion...

46

Analysis Model for Domestic Hot Water Distribution Systems: Preprint  

SciTech Connect (OSTI)

A thermal model was developed to estimate the energy losses from prototypical domestic hot water (DHW) distribution systems for homes. The developed model, using the TRNSYS simulation software, allows researchers and designers to better evaluate the performance of hot water distribution systems in homes. Modeling results were compared with past experimental study results and showed good agreement.

Maguire, J.; Krarti, M.; Fang, X.

2011-11-01T23:59:59.000Z

47

Air distribution effectiveness with stratified air distribution systems  

E-Print Network [OSTI]

1 Air distribution effectiveness with stratified air distribution systems Kisup Lee* Zheng Jiang, Ph.D Qingyan Chen, Ph.D. Student Member ASHRAE Fellow ASHRAE ABSTRACT Stratified air distribution systems such as Traditional Displacement Ventilation (TDV) and Under- Floor Air Distribution (UFAD

Chen, Qingyan "Yan"

48

Measuring Advances in HVAC Distribution System Design  

E-Print Network [OSTI]

Gabel and Andresen, HVAC Secondary Toolkil. Atlanta: ASHRAE,P_02 Measuring Advances in HVAC Distribution System Designdesign and operation of the HVAC thermal distribution system

Franconi, E.

2011-01-01T23:59:59.000Z

49

Building America Webinar: Ductless Hydronic Distribution Systems...  

Energy Savers [EERE]

Building America Webinar: Ductless Hydronic Distribution Systems Building America Webinar: Ductless Hydronic Distribution Systems This webinar was presented by research team...

50

Enhanced distributed energy resource system  

DOE Patents [OSTI]

A power transmission system including a direct current power source electrically connected to a conversion device for converting direct current into alternating current, a conversion device connected to a power distribution system through a junction, an energy storage device capable of producing direct current connected to a converter, where the converter, such as an insulated gate bipolar transistor, converts direct current from an energy storage device into alternating current and supplies the current to the junction and subsequently to the power distribution system. A microprocessor controller, connected to a sampling and feedback module and the converter, determines when the current load is higher than a set threshold value, requiring triggering of the converter to supply supplemental current to the power transmission system.

Atcitty, Stanley (Albuquerque, NM); Clark, Nancy H. (Corrales, NM); Boyes, John D. (Albuquerque, NM); Ranade, Satishkumar J. (Las Cruces, NM)

2007-07-03T23:59:59.000Z

51

Advanced simulation of intelligent transportation systems  

SciTech Connect (OSTI)

A large-scale, comprehensive, scaleable simulation of an Intelligent Transportation System (ITS) has been developed which is capable of running on parallel computers and distributed (networked) computer systems. The simulator currently models instrumented {open_quotes}smart{close_quotes} vehicles with in-vehicle navigation units capable of optimal route planning and Traffic Management Centers (TMC). The TMC has probe vehicle tracking capabilities (display position and attributes of instrumented vehicles), and can provide two-way interaction with traffic to provide advisories and link times. Both the in-vehicle navigation module and the TMC feature detailed graphical user interfaces to support human-factors studies. The prototype has been developed on a distributed system of networked UNIX computers but is designed to run on parallel computers, such as ANL`s IBM SP-2, for large-scale problems. A novel feature of this approach is that vehicles are represented by autonomous computer processes which exchange messages with other processes. The vehicles have a behavior model which governs route selection and driving behavior, and can react to external traffic events much like real vehicles. With this approach, the simulation is scaleable to take advantage of emerging massively parallel processor (MPP) systems.

Ewing, T.; Doss, E.; Hanebutte, U.; Tentner, A. [Argonne National Lab., IL (United States)

1996-11-01T23:59:59.000Z

52

Optimisation of a Crossdocking Distribution Centre Simulation Model  

E-Print Network [OSTI]

This paper reports on continuing research into the modelling of an order picking process within a Crossdocking distribution centre using Simulation Optimisation. The aim of this project is to optimise a discrete event simulation model and to understand factors that affect finding its optimal performance. Our initial investigation revealed that the precision of the selected simulation output performance measure and the number of replications required for the evaluation of the optimisation objective function through simulation influences the ability of the optimisation technique. We experimented with Common Random Numbers, in order to improve the precision of our simulation output performance measure, and intended to use the number of replications utilised for this purpose as the initial number of replications for the optimisation of our Crossdocking distribution centre simulation model. Our results demonstrate that we can improve the precision of our selected simulation output performance measure value using C...

Adewunmi, Adrian

2010-01-01T23:59:59.000Z

53

Simulating Complex Window Systems using BSDF Data  

SciTech Connect (OSTI)

Nowadays, virtual models are commonly used to evaluate the performance of conventional window systems. Complex fenestration systems can be difficult to simulate accurately not only because of their geometry but also because of their optical properties that scatter light in an unpredictable manner. Bi-directional Scattering Distribution Functions (BSDF) have recently been developed based on a mixture of measurements and modelling to characterize the optics of such systems. This paper describes the workflow needed to create then use these BSDF datasets in the Radiance lighting simulation software. Limited comparisons are made between visualizations produced using the standard ray-tracing method, the BSDF method, and that taken in a full-scale outdoor mockup.

Konstantoglou, Maria; Jonsson, Jacob; Lee, Eleanor

2009-06-22T23:59:59.000Z

54

Simulation Steering with SCIRun in a Distributed Memory Environment  

E-Print Network [OSTI]

Lake City, UT 84112 fmmiller, hansen, sparker, crjg@cs.utah.edu http://www.cs.utah.edu/¸sci #12Simulation Steering with SCIRun in a Distributed Memory Environment Michelle Miller, Charles D

Utah, University of

55

Simulation Steering with SCIRun in a Distributed Environment  

E-Print Network [OSTI]

, and Christopher R. Johnson University of Utah, Salt Lake City, UT 84112, USA, fmmiller, hansen, crjgSimulation Steering with SCIRun in a Distributed Environment Michelle Miller, Charles D. Hansen

Utah, University of

56

Simulation Steering with SCIRun in a Distributed Memory Environment  

E-Print Network [OSTI]

Lake City, UT 84112 fmmiller, hansen, sparker, crjg@cs.utah.edu http: www.cs.utah.edu sci #12;AbstractSimulation Steering with SCIRun in a Distributed Memory Environment Michelle Miller, Charles D

Utah, University of

57

Distribution Effectiveness and Impacts on Equipment Sizing for Residential Thermal Distribution Systems  

E-Print Network [OSTI]

1 LBNL-43724 Distribution Effectiveness and Impacts on Equipment Sizing for Residential Thermal Distribution Systems Walker, I., Sherman, M., and Siegel, J. Environmental Energy Technologies Division Energy .................................................................................................................. 14 Figure 1. Simulations of Pulldowns from 3:00 p.m. on a Sacramento Design Day

58

A reliability assessment methodology for distribution systems with distributed generation  

E-Print Network [OSTI]

Reliability assessment is of primary importance in designing and planning distribution systems that operate in an economic manner with minimal interruption of customer loads. With the advances in renewable energy sources, Distributed Generation (DG...

Duttagupta, Suchismita Sujaya

2006-08-16T23:59:59.000Z

59

1 A Grid based distributed simulation of Plasma Turbulence  

E-Print Network [OSTI]

1 A Grid based distributed simulation of Plasma Turbulence Beniamino Di Martino and Salvatore- cati, Rome, Italy Grid technology is widespreading, but most grid-enabled applications just exploit of Grid platforms. In this paper the porting on a Globus equipped platform of a hierarchically distributed

Vlad, Gregorio

60

Automated Fault Location In Smart Distribution Systems  

E-Print Network [OSTI]

of utilizing a suitable fault location method. As distribution systems are gradually evolving into smart distribution systems, application of more accurate fault location methods based on gathered data from various Intelligent Electronic Devices (IEDs...

Lotfifard, Saeed

2012-10-19T23:59:59.000Z

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Large-scale Intelligent Transporation Systems simulation  

SciTech Connect (OSTI)

A prototype computer system has been developed which defines a high-level architecture for a large-scale, comprehensive, scalable simulation of an Intelligent Transportation System (ITS) capable of running on massively parallel computers and distributed (networked) computer systems. The prototype includes the modelling of instrumented ``smart`` vehicles with in-vehicle navigation units capable of optimal route planning and Traffic Management Centers (TMC). The TMC has probe vehicle tracking capabilities (display position and attributes of instrumented vehicles), and can provide 2-way interaction with traffic to provide advisories and link times. Both the in-vehicle navigation module and the TMC feature detailed graphical user interfaces to support human-factors studies. The prototype has been developed on a distributed system of networked UNIX computers but is designed to run on ANL`s IBM SP-X parallel computer system for large scale problems. A novel feature of our design is that vehicles will be represented by autonomus computer processes, each with a behavior model which performs independent route selection and reacts to external traffic events much like real vehicles. With this approach, one will be able to take advantage of emerging massively parallel processor (MPP) systems.

Ewing, T.; Canfield, T.; Hannebutte, U.; Levine, D.; Tentner, A.

1995-06-01T23:59:59.000Z

62

Designing Distributed, Real-Time Systems  

E-Print Network [OSTI]

- - Designing Distributed, Real-Time Systems Kevin L. Mills INFT 796 SUMMER 1993 DIRECTED READINGS IN SOFTWARE ENGINEERING WITH DR. H. GOMAA GEORGE MASON UNIVERSITY #12;Designing Distributed, Real-Time Systems problem faced by designers of software systems, and particularly by designers of distributed, real

Mills, Kevin

63

Reliable Distributed Computing for Decision Support Systems  

E-Print Network [OSTI]

Reliable Distributed Computing for Decision Support Systems Taha Osman, Andrzej Bargiela Department of application tasks on the currently avail- able computing nodes. Distributed Systems Reliability Due decision-support systems such as water distribution net- works, involving hundreds or even thousands

Bargiela, Andrzej

64

Distributed Energy Systems Integration Group (Fact Sheet)  

SciTech Connect (OSTI)

Factsheet developed to describe the activites of the Distributed Energy Systems Integration Group within NREL's Electricity, Resources, and Buildings Systems Integration center.

Not Available

2009-10-01T23:59:59.000Z

65

Energy Efficiency of Distributed Environmental Control Systems  

SciTech Connect (OSTI)

In this report, we present an analytical evaluation of the potential of occupant-regulated distributed environmental control systems (DECS) to enhance individual occupant thermal comfort in an office building with no increase, and possibly even a decrease in annual energy consumption. To this end we developed and applied several analytical models that allowed us to optimize comfort and energy consumption in partitioned office buildings equipped with either conventional central HVAC systems or occupant-regulated DECS. Our approach involved the following interrelated components: 1. Development of a simplified lumped-parameter thermal circuit model to compute the annual energy consumption. This was necessitated by the need to perform tens of thousands of optimization calculations involving different US climatic regions, and different occupant thermal preferences of a population of ~50 office occupants. Yearly transient simulations using TRNSYS, a time-dependent building energy modeling program, were run to determine the robustness of the simplified approach against time-dependent simulations. The simplified model predicts yearly energy consumption within approximately 0.6% of an equivalent transient simulation. Simulations of building energy usage were run for a wide variety of climatic regions and control scenarios, including traditional one-size-fits-all (OSFA) control; providing a uniform temperature to the entire building, and occupant-selected have-it-your-way (HIYW) control with a thermostat at each workstation. The thermal model shows that, un-optimized, DECS would lead to an increase in building energy consumption between 3-16% compared to the conventional approach depending on the climate regional and personal preferences of building occupants. Variations in building shape had little impact in the relative energy usage. 2. Development of a gradient-based optimization method to minimize energy consumption of DECS while keeping each occupants thermal dissatisfaction below a given threshold. The DECS energy usage was calculated using the simplified thermal model. OSFA control; providing a uniform temperature to the entire building, and occupant-selected HIYW control with a thermostat at each workstation were implemented for 3 cities representing 3 different climatic regions and control scenarios. It is shown that optimization allows DECS to deliver a higher level of individual and population thermal comfort while achieving annual energy savings between 14 and 26% compared to OSFA. The optimization model also allowed us to study the influence of the partitions thermal resistance and the variability of internal loads at each office. These influences didnt make significant changes in the optimized energy consumption relative to OSFA. The results show that it is possible to provide thermal comfort for each occupant while saving energy compared to OSFA Furthermore, to simplify the implementation of this approach, a fuzzy logic system has been developed to generalize the overall optimization strategy. Its performance was almost as good as the gradient system. The fuzzy system provided thermal comfort to each occupant and saved energy compared to OSFA. The energy savings of the fuzzy system were not as high as for the gradient-optimized system, but the fuzzy system avoided complete connectivity, and the optimization did not have to be repeated for each population. 3. We employed a detailed CFD model of adjacent occupied cubicles to extend the thermal-circuit model in three significant ways: (a) relax the office wall requirement by allowing energy to flow between zones via advection as well as conduction, (b) improve the comfort model to account both for radiation as well as convection heat transfer, and (c) support ventilation systems in which the temperature is stratified, such as in underfloor air distribution systems. Initially, three-dimensional CFD simulations of several cubicle configurations, with an adjoining corridor, were performed both to understand the advection between cubicles and the

Khalifa, H. Ezzat; Isik, Can; Dannenhoffer, John F. III

2011-02-23T23:59:59.000Z

66

Distributed Termination Detection for Dynamic Systems  

E-Print Network [OSTI]

Distributed Termination Detection for Dynamic Systems D. M. Dhamdhere \\Lambda Sridhar R. Iyer E for detecting the termination of a dis­ tributed computation is presented. The algorithm does not require global are provided. Keywords Distributed algorithms, Distributed computation, Distributed termination, Dynamic

Dhamdhere, Dhananjay Madhav

67

UAV Based Distributed ATR under Realistic Simulated Environmental Effects  

E-Print Network [OSTI]

UAV Based Distributed ATR under Realistic Simulated Environmental Effects Xiaohan Chen, Shanshan has grown increasingly reliant upon the use of unattended aerial vehicles (UAVs) for surveillance missions. There is an increasing trend towards fielding swarms of UAVs operating as large-scale sensor

Valenti, Matthew C.

68

Cloud vertical distribution from radiosonde, remote sensing, and model simulations  

E-Print Network [OSTI]

Cloud vertical distribution from radiosonde, remote sensing, and model simulations Jinqiang Zhang's radiation budget and atmospheric adiabatic heating. Yet it is among the most difficult quantities to observe Great Plains and along with ground- based and space-borne remote sensing products, use it to evaluate

Li, Zhanqing

69

Scalable, probabilistic simulation in a distributed design environment  

E-Print Network [OSTI]

Integrated simulations have been used to predict and analyze the integrated behavior of large, complex product and technology systems throughout their design cycles. During the process of integration, uncertainties arise ...

Mao, Wei, Ph. D. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

70

Describing and Analyzing Distributed Software System Designs  

E-Print Network [OSTI]

Describing and Analyzing Distributed Software System Designs GEORGE S. AVRUNIN and JACK C. WILEDEN by applying it to a realistic distributed software-system design problem involving mutual exclusion Additional Key Words and Phrases: Analysis of software design, design notation, distributed mutual exclusion

Avrunin, George S.

71

Low jitter RF distribution system  

DOE Patents [OSTI]

A timing signal distribution system includes an optical frequency stabilized laser signal amplitude modulated at an rf frequency. A transmitter box transmits a first portion of the laser signal and receive a modified optical signal, and outputs a second portion of the laser signal and a portion of the modified optical signal. A first optical fiber carries the first laser signal portion and the modified optical signal, and a second optical fiber carries the second portion of the laser signal and the returned modified optical signal. A receiver box receives the first laser signal portion, shifts the frequency of the first laser signal portion outputs the modified optical signal, and outputs an electrical signal on the basis of the laser signal. A detector at the end of the second optical fiber outputs a signal based on the modified optical signal. An optical delay sensing circuit outputs a data signal based on the detected modified optical signal. An rf phase detect and correct signal circuit outputs a signal corresponding to a phase stabilized rf signal based on the data signal and the frequency received from the receiver box.

Wilcox, Russell; Doolittle, Lawrence; Huang, Gang

2012-09-18T23:59:59.000Z

72

Human-in-the-Loop Distributed Simulation and Validation of Strategic Autonomous Algorithms  

E-Print Network [OSTI]

Human-in-the-Loop Distributed Simulation and Validation of Strategic Autonomous Algorithms Christopher W. Lum, Matthew L. Rowland, and Rolf T. Rysdyk Autonomous Flight Systems Laboratory University autonomously without human interaction. Most of these autonomous algorithms operate at a high, strate- gic

Washington at Seattle, University of

73

Prognostics for the Maintenance of Distributed Systems  

E-Print Network [OSTI]

but also higher level function prognosis. I. INTRODUCTION In the classical case, preventive maintenance of preventive maintenance for complex systems. In this sense, a distributed system can be split down into a setPrognostics for the Maintenance of Distributed Systems Pauline Ribot, Yannick Pencol´e and Michel

Pencolé, Yannick

74

SIMULATION OF RESIDENTIAL HVAC SYSTEM PERFORMANCE  

E-Print Network [OSTI]

1 LBNL-47622 SIMULATION OF RESIDENTIAL HVAC SYSTEM PERFORMANCE Walker, I., Siegel, J ..................................................... 9 #12;3 ABSTRACT In many parts of North America residential HVAC systems are installed outside of the simulations is that they are dynamic - which accounts for cyclic losses from the HVAC system and the effect

75

Building a Smarter Distribution System in Pennsylvania  

Broader source: Energy.gov (indexed) [DOE]

Development of an advanced distribution management system (DMS) software is at the heart of the project. The DMS monitors and controls all of the smart devices being installed...

76

System Simulations of Hybrid Electric Vehicles with Focus on...  

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

System Simulations of Hybrid Electric Vehicles with Focus on Emissions System Simulations of Hybrid Electric Vehicles with Focus on Emissions Comparative simulations of hybrid...

77

Air Distribution Effectiveness for Residential Mechanical Ventilation: Simulation and Comparison of Normalized Exposures  

SciTech Connect (OSTI)

The purpose of ventilation is to dilute indoor contaminants that an occupant is exposed to. Even when providing the same nominal rate of outdoor air, different ventilation systems may distribute air in different ways, affecting occupants' exposure to household contaminants. Exposure ultimately depends on the home being considered, on source disposition and strength, on occupants' behavior, on the ventilation strategy, and on operation of forced air heating and cooling systems. In any multi-zone environment dilution rates and source strengths may be different in every zone and change in time, resulting in exposure being tied to occupancy patterns.This paper will report on simulations that compare ventilation systems by assessing their impact on exposure by examining common house geometries, contaminant generation profiles, and occupancy scenarios. These simulations take into account the unsteady, occupancy-tied aspect of ventilation such as bathroom and kitchen exhaust fans. As most US homes have central HVAC systems, the simulation results will be used to make appropriate recommendations and adjustments for distribution and mixing to residential ventilation standards such as ASHRAE Standard 62.2.This paper will report on work being done to model multizone airflow systems that are unsteady and elaborate the concept of distribution matrix. It will examine several metrics for evaluating the effect of air distribution on exposure to pollutants, based on previous work by Sherman et al. (2006).

Petithuguenin, T.D.P.; Sherman, M.H.

2009-05-01T23:59:59.000Z

78

Method for simulating discontinuous physical systems  

DOE Patents [OSTI]

The mathematical foundations of conventional numerical simulation of physical systems provide no consistent description of the behavior of such systems when subjected to discontinuous physical influences. As a result, the numerical simulation of such problems requires ad hoc encoding of specific experimental results in order to address the behavior of such discontinuous physical systems. In the present invention, these foundations are replaced by a new combination of generalized function theory and nonstandard analysis. The result is a class of new approaches to the numerical simulation of physical systems which allows the accurate and well-behaved simulation of discontinuous and other difficult physical systems, as well as simpler physical systems. Applications of this new class of numerical simulation techniques to process control, robotics, and apparatus design are outlined.

Baty, Roy S. (Albuquerque, NM); Vaughn, Mark R. (Albuquerque, NM)

2001-01-01T23:59:59.000Z

79

Lighting system with heat distribution face plate  

DOE Patents [OSTI]

Lighting systems having a light source and a thermal management system are provided. The thermal management system includes synthetic jet devices, a heat sink and a heat distribution face plate. The synthetic jet devices are arranged in parallel to one and other and are configured to actively cool the lighting system. The heat distribution face plate is configured to radially transfer heat from the light source into the ambient air.

Arik, Mehmet; Weaver, Stanton Earl; Stecher, Thomas Elliot; Kuenzler, Glenn Howard; Wolfe, Jr., Charles Franklin; Li, Ri

2013-09-10T23:59:59.000Z

80

VAXclusters: A Closely-Coupled Distributed System  

E-Print Network [OSTI]

of VAX computers that operate as a single system. To achieve performance in a multicomputer environment designed. The software is a distributed version of the VAX/VMS operating system that uses a distributed efficient, for example, capable of sending and receiving 3000 messages per second on a VAX-11

Anderson, Richard

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Hybrid solar lighting distribution systems and components  

DOE Patents [OSTI]

A hybrid solar lighting distribution system and components having at least one hybrid solar concentrator, at least one fiber receiver, at least one hybrid luminaire, and a light distribution system operably connected to each hybrid solar concentrator and each hybrid luminaire. A controller operates all components.

Muhs, Jeffrey D. (Lenoir City, TN); Earl, Dennis D. (Knoxville, TN); Beshears, David L. (Knoxville, TN); Maxey, Lonnie C. (Powell, TN); Jordan, John K. (Oak Ridge, TN); Lind, Randall F. (Lenoir City, TN)

2011-07-05T23:59:59.000Z

82

Monte Carlo simulation in systems biology  

E-Print Network [OSTI]

2 The history of Monte Carlo Sampling in Systems Biology 1.1simulation tools: the systems biology workbench and biospiceCellular and Molecular Biology. ASM Press, Washington

Schellenberger, Jan

2010-01-01T23:59:59.000Z

83

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

E-Print Network [OSTI]

Smart Grid on distribution system design," in Proc. of thestorage system design for distribution network," in Proc. ofdesign can noticeably improve the operational performance of the power distribution

Taylor, Zachariah David

2014-01-01T23:59:59.000Z

84

The simulation system SIMPLEX II  

E-Print Network [OSTI]

in the response of the model. Sensitivity analysis can determine regions of instability in the parameter range space and therefore point to parameters, which have to be estimated with increased care. Using a stochastic simulation model we will demonstrate how...

Schinagl, Josef Georg

1995-01-01T23:59:59.000Z

85

THE DISTRIBUTED SPACECRAFT ATTITUDE CONTROL SYSTEM SIMULATOR  

E-Print Network [OSTI]

algorithms are being developed and tested on DSACSS, combining momentum/reaction wheel, control moment gyro a similar purpose -- ball-and-socket joints, for example -- but air bearings yield much lower friction

Hall, Christopher D.

86

Extensible Software Architecture for a Distributed Engineering Simulation Facility  

E-Print Network [OSTI]

.5.1 Daemon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 1.5.2 Application Programming Interface . . . . . . . . . . . . . . . 13 1.5.3 Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1.6 Research Objectives... . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1.6.1 Cross-Platform Daemon Design . . . . . . . . . . . . . . . . . 15 1.6.2 Creation of API Libraries . . . . . . . . . . . . . . . . . . . . 15 1.6.3 Integration of Simulation Modules with Architecture . . . . . 15 1.6.4 Evaluation of System...

May, James F

2013-03-18T23:59:59.000Z

87

NetStep: a micro-stepped distributed network simulation Olivier Dalle  

E-Print Network [OSTI]

NetStep: a micro-stepped distributed network simulation framework Olivier Dalle Laboratoire I3S UMR This paper presents NetStep, a prototype for the distributed simulation of very large scale network simulations, such as the simulation of peer-to-peer applications. We use sim- ulation micro-steps as a means

Paris-Sud XI, Université de

88

Using HLA and Grid for Distributed Multiscale Simulations  

E-Print Network [OSTI]

) and hydro dynamics (simulation of collisions - in micro scale). Combining simulations of different scale

Amsterdam, Universiteit van

89

A DISTRIBUTED AUTOMATION SYSTEM FOR ELECTROPHYSICAL INSTALLATIONS  

E-Print Network [OSTI]

A DISTRIBUTED AUTOMATION SYSTEM FOR ELECTROPHYSICAL INSTALLATIONS V.R. Kozak Budker Institute There was designed a set of devices for automation systems of physical installations. On this basis approach. KEY WORDS Automation, systems, applications, CANBUS, embedded, controller. 1. Introduction Budker

Kozak, Victor R.

90

Convex Models of Distribution System Reconfiguration  

E-Print Network [OSTI]

We derive new mixed-integer quadratic, quadratically constrained, and second-order cone programming models of distribution system reconfiguration, which are to date the first formulations of the ac problem that have convex, ...

Taylor, Joshua A.

91

Strategy Guideline: Compact Air Distribution Systems  

SciTech Connect (OSTI)

This Strategy Guideline discusses the benefits and challenges of using a compact air distribution system to handle the reduced loads and reduced air volume needed to condition the space within an energy efficient home. Traditional systems sized by 'rule of thumb' (i.e., 1 ton of cooling per 400 ft2 of floor space) that 'wash' the exterior walls with conditioned air from floor registers cannot provide appropriate air mixing and moisture removal in low-load homes. A compact air distribution system locates the HVAC equipment centrally with shorter ducts run to interior walls, and ceiling supply outlets throw the air toward the exterior walls along the ceiling plane; alternatively, high sidewall supply outlets throw the air toward the exterior walls. Potential drawbacks include resistance from installing contractors or code officials who are unfamiliar with compact air distribution systems, as well as a lack of availability of low-cost high sidewall or ceiling supply outlets to meet the low air volumes with good throw characteristics. The decision criteria for a compact air distribution system must be determined early in the whole-house design process, considering both supply and return air design. However, careful installation of a compact air distribution system can result in lower material costs from smaller equipment, shorter duct runs, and fewer outlets; increased installation efficiencies, including ease of fitting the system into conditioned space; lower loads on a better balanced HVAC system, and overall improved energy efficiency of the home.

Burdick, A.

2013-06-01T23:59:59.000Z

92

OPTIMISATION OF A CROSSDOCKING DISTRIBUTION CENTRE SIMULATION MODEL Adrian Adewunmi, Uwe Aickelin  

E-Print Network [OSTI]

OPTIMISATION OF A CROSSDOCKING DISTRIBUTION CENTRE SIMULATION MODEL Adrian Adewunmi, Uwe Aickelin using Simulation Optimisation. The aim of this project is to optimise a discrete event simulation model simulation model. Our results demonstrate that we can improve the precision of our selected simulation output

Aickelin, Uwe

93

Generic solar photovoltaic system dynamic simulation model specification.  

SciTech Connect (OSTI)

This document is intended to serve as a specification for generic solar photovoltaic (PV) system positive-sequence dynamic models to be implemented by software developers and approved by the WECC MVWG for use in bulk system dynamic simulations in accordance with NERC MOD standards. Two specific dynamic models are included in the scope of this document. The first, a Central Station PV System model, is intended to capture the most important dynamic characteristics of large scale (> 10 MW) PV systems with a central Point of Interconnection (POI) at the transmission level. The second, a Distributed PV System model, is intended to represent an aggregation of smaller, distribution-connected systems that comprise a portion of a composite load that might be modeled at a transmission load bus.

Ellis, Abraham; Behnke, Michael Robert; Elliott, Ryan Thomas

2013-10-01T23:59:59.000Z

94

Virtualizing Operating Systems for Seamless Distributed Environments  

E-Print Network [OSTI]

Virtualizing Operating Systems for Seamless Distributed Environments 1 Tom Boyd and Partha Dasgupta of the "Computing Communities" project, a joint effort between Arizona State University and New York University. Abstract Applications and operating systems can be augmented with extra functionality by injecting

Dasgupta, Partha

95

Modeling of Diesel Exhaust Systems: A methodology to better simulate...  

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

of Diesel Exhaust Systems: A methodology to better simulate soot reactivity Modeling of Diesel Exhaust Systems: A methodology to better simulate soot reactivity Discussed...

96

Energy optimization of water distribution system  

SciTech Connect (OSTI)

In order to analyze pump operating scenarios for the system with the computer model, information on existing pumping equipment and the distribution system was collected. The information includes the following: component description and design criteria for line booster stations, booster stations with reservoirs, and high lift pumps at the water treatment plants; daily operations data for 1988; annual reports from fiscal year 1987/1988 to fiscal year 1991/1992; and a 1985 calibrated KYPIPE computer model of DWSD`s water distribution system which included input data for the maximum hour and average day demands on the system for that year. This information has been used to produce the inventory database of the system and will be used to develop the computer program to analyze the system.

Not Available

1993-02-01T23:59:59.000Z

97

On-Site Wastewater Treatment Systems: Spray Distribution  

E-Print Network [OSTI]

A spray distribution system is very similar to a lawn irrigation system. Spray heads are used to distribute treated wastewater to the surface of the yard. This publication explains the advantages and disadvantages of spray distribution systems...

Lesikar, Bruce J.

1999-09-06T23:59:59.000Z

98

Chapitre 8: Simulation for Product Driven Systems  

E-Print Network [OSTI]

Chapitre 8: Simulation for Product Driven Systems CASTAGNA Pierre, THOMAS André BLANC Pascal of controlling production through traditional MRP² systems. hal-00341987,version1-26Nov2008 Author manuscript needs. Indeed, the mass production market moves to a mass customization one, which could be defined

Paris-Sud XI, Université de

99

Transmission pricing of distributed multilateral energy transactions to ensure system security and guide economic dispatch  

E-Print Network [OSTI]

In this paper we provide a simulations-based demonstration of a hybrid electricity market that combines the distributed competitive advantages of decentralized markets with the system security guarantees of centralized ...

Ilic, Marija D.

2002-01-01T23:59:59.000Z

100

Standard Data Exchanges for Distribution System Management  

SciTech Connect (OSTI)

Databases and software tools for electric power distribution systems have not been integrated, and this leads to extra costs and restrictions imposed on utilities and other stakeholders. For example, distributed resource integration studies and modern grid technology assessments are more difficult and costly. New vendors face high market entry barriers, because its necessary to interface with large and customized data systems at each potential utility customer. This project promotes data and software tool integration, through a set of data translators based on a common object model. The data translators are delivered as open-source software, using appropriate Web software technologies. The parties who benefit include electric utilities (and their ratepayers), researchers at government laboratories and universities, small software companies wishing to enter the electric utility market, and parties wishing to interconnect distributed generation to a utility system.

Thomas E. McDermott

2007-10-05T23:59:59.000Z

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Distributed/Stationary Fuel Cell Systems | Department of Energy  

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

DistributedStationary Fuel Cell Systems DistributedStationary Fuel Cell Systems Photo of stationary fuel cell The Department of Energy (DOE) is developing high-efficiency fuel...

102

Energy Efficient HVAC System for Distributed Cooling/Heating...  

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

Efficient HVAC System for Distributed CoolingHeating with Thermoelectric Devices Energy Efficient HVAC System for Distributed CoolingHeating with Thermoelectric Devices 2012 DOE...

103

Integration of HVAC System Design with Simplified Duct Distribution...  

Broader source: Energy.gov (indexed) [DOE]

Integration of HVAC System Design with Simplified Duct Distribution - Building America Top Innovation Integration of HVAC System Design with Simplified Duct Distribution - Building...

104

PHOSPHORUS IN ALUM AMENDED POULTRY LITTER SYSTEMS: DISTRIBUTION, SPECIATION, AND  

E-Print Network [OSTI]

PHOSPHORUS IN ALUM AMENDED POULTRY LITTER SYSTEMS: DISTRIBUTION, SPECIATION, AND INTERACTIONS;PHOSPHORUS IN ALUM AMENDED POULTRY LITTER SYSTEMS: DISTRIBUTION, SPECIATION, AND INTERACTIONS WITH ALUMINUM

Sparks, Donald L.

105

High temperature hot water distribution system study  

SciTech Connect (OSTI)

The existing High Temperature Hot Water (HTHW) Distribution System has been plagued with design and construction deficiencies since startup of the HTHW system, in October 1988. In October 1989, after one year of service, these deficiencies were outlined in a technical evaluation. The deficiencies included flooded manholes, sump pumps not hooked up, leaking valves, contaminated HTHW water, and no cathodic protection system. This feasibility study of the High Temperature Hot Water (HTHW) Distribution System was performed under Contract No. DACA0l-94-D-0033, Delivery Order 0013, Modification 1, issued to EMC Engineers, Inc. (EMC), by the Norfolk District Corps of Engineers, on 25 April 1996. The purpose of this study was to determine the existing conditions of the High Temperature Hot Water Distribution System, manholes, and areas of containment system degradation. The study focused on two areas of concern, as follows: * Determine existing conditions and areas of containment system degradation (leaks) in the underground carrier pipes and protective conduit. * Document the condition of underground steel and concrete manholes. To document the leaks, a site survey was performed, using state-of-the-art infrared leak detection equipment and tracer gas leak detection equipment. To document the condition of the manholes, color photographs were taken of the insides of 125 manholes, and notes were made on the condition of these manholes.

NONE

1996-12-01T23:59:59.000Z

106

World Class Boilers and Steam Distribution System  

E-Print Network [OSTI]

WORLD CLASS BOILERS AND STEAM DISTRIBUTION SYSTEM Vernon P. Portell, Ph.D. Manager Armstrong Service, Inc. ABSTRACT categorizing, measuring, and comparing subjects which are of interest to us is the way we identify the "World class" is a... of information can also be obtained through an independent firm that provides third-party assessment of steam systems. One of these third parties, Armstrong Energy Certification, Inc., has used data gleaned from decades of industrial experience...

Portell, V. P.

107

Expert systems for design and simulation  

SciTech Connect (OSTI)

We discuss work in progress on two expert systems. We are developing systems that use artificial intelligence techniques to simplify the use of large simulation codes and to help design complicated physical devices. The simulation codes are used in analyzing and designing weapons, and the devices are themselves part of weapon systems. But we focus not only on the particular applications, but also on the broader issues common to design problems: large solution spaces and tentative reasoning. We also discuss some practical difficulties encountered during the project. One expert system provides an interface between users and several simulation codes. It checks input for errors, builds input files for the codes, and submits jobs to a central computing facility. The other expert system helps turn a description of a device into a particular design. Currently this expert system includes three major parts: a translator of descriptions into designs, a graphics interface that presents the design to the user and allows him to manipulate it, and a refiner of designs. The latter is the ''smartest'' part of the system, and the target of much of our present efforts.

Aldridge, J.; Cerutti, J.; Draisin, W.; Steuerwalt, M.

1985-01-01T23:59:59.000Z

108

Laser spark distribution and ignition system  

DOE Patents [OSTI]

A laser spark distribution and ignition system that reduces the high power optical requirements for use in a laser ignition and distribution system allowing for the use of optical fibers for delivering the low peak energy pumping pulses to a laser amplifier or laser oscillator. An optical distributor distributes and delivers optical pumping energy from an optical pumping source to multiple combustion chambers incorporating laser oscillators or laser amplifiers for inducing a laser spark within a combustion chamber. The optical distributor preferably includes a single rotating mirror or lens which deflects the optical pumping energy from the axis of rotation and into a plurality of distinct optical fibers each connected to a respective laser media or amplifier coupled to an associated combustion chamber. The laser spark generators preferably produce a high peak power laser spark, from a single low power pulse. The laser spark distribution and ignition system has application in natural gas fueled reciprocating engines, turbine combustors, explosives and laser induced breakdown spectroscopy diagnostic sensors.

Woodruff, Steven (Morgantown, WV); McIntyre, Dustin L. (Morgantown, WV)

2008-09-02T23:59:59.000Z

109

Distributed parallel messaging for multiprocessor systems  

DOE Patents [OSTI]

A method and apparatus for distributed parallel messaging in a parallel computing system. The apparatus includes, at each node of a multiprocessor network, multiple injection messaging engine units and reception messaging engine units, each implementing a DMA engine and each supporting both multiple packet injection into and multiple reception from a network, in parallel. The reception side of the messaging unit (MU) includes a switch interface enabling writing of data of a packet received from the network to the memory system. The transmission side of the messaging unit, includes switch interface for reading from the memory system when injecting packets into the network.

Chen, Dong; Heidelberger, Philip; Salapura, Valentina; Senger, Robert M; Steinmacher-Burrow, Burhard; Sugawara, Yutaka

2013-06-04T23:59:59.000Z

110

Carbon and Water Resource Management for Water Distribution Systems  

E-Print Network [OSTI]

Reliability Corporation Polyethylene Polyvinyl chloride Society of Environmental Toxicology and Chemistry Water Distribution System

Hendrickson, Thomas Peter

2013-01-01T23:59:59.000Z

111

A multiprocessor system for real-time simulation of power electronic circuits  

E-Print Network [OSTI]

that describes it [7]. Its applications are widely distributed among many areas of technology such as process controls, aerospace, and other engineering oriented system design and analysis problems. Real-time simulation is a much favored simulation method...A MULTIPROCESSOR SYSTEM FOR REAL-TIME SIMULATION OF POWER ELECTRONIC CIRCUITS A Thesis by NABIL HUSSEIN QAWASMI Submitted to the Graduate College of Texas AkM University in partial fulfillment of the requirement for the degree of MASTER...

Qawasmi, Nabil Hussein

1988-01-01T23:59:59.000Z

112

Impact of High Wind Penetration on the Voltage Profile of Distribution Systems  

E-Print Network [OSTI]

of wind generator the voltage of the system may become lower than acceptable voltage level due and wind generator is presented. Simulation results are given in Section III which shows the impact of high--In this paper, simulation results showing the effect of lower and higher penetration of distributed wind

Pota, Himanshu Roy

113

A system for distributed intrusion detection  

SciTech Connect (OSTI)

The study of providing security in computer networks is a rapidly growing area of interest because the network is the medium over which most attacks or intrusions on computer systems are launched. One approach to solving this problem is the intrusion-detection concept, whose basic premise is that not only abandoning the existing and huge infrastructure of possibly-insecure computer and network systems is impossible, but also replacing them by totally-secure systems may not be feasible or cost effective. Previous work on intrusion-detection systems were performed on stand-alone hosts and on a broadcast local area network (LAN) environment. The focus of our present research is to extend our network intrusion-detection concept from the LAN environment to arbitarily wider areas with the network topology being arbitrary as well. The generalized distributed environment is heterogeneous, i.e., the network nodes can be hosts or servers from different vendors, or some of them could be LAN managers, like our previous work, a network security monitor (NSM), as well. The proposed architecture for this distributed intrusion-detection system consists of the following components: a host manager in each host; a LAN manager for monitoring each LAN in the system; and a central manager which is placed at a single secure location and which receives reports from various host and LAN managers to process these reports, correlate them, and detect intrusions. 11 refs., 2 figs.

Snapp, S.R.; Brentano, J.; Dias, G.V.; Goan, T.L.; Heberlein, L.T.; Ho, Che-Lin; Levitt, K.N.; Mukherjee, B. (California Univ., Davis, CA (USA). Div. of Computer Science); Grance, T. (Air Force Cryptologic Support Center, San Antonio, TX (USA)); Mansur, D.L.; Pon, K.L. (Lawrence Livermore National Lab., CA (USA)); Smaha, S.E. (Haystack Labs., Inc., Austin, TX (USA))

1991-01-01T23:59:59.000Z

114

Simulating the Daylight Performance of Complex Fenestration Systems Using  

E-Print Network [OSTI]

LBNL-4414E Simulating the Daylight Performance of Complex Fenestration Systems Using Bidirectional, January 21, 2011. 1 Simulating the Daylight Performance of Complex Fenestration Systems Using (BSDFs) to model the daylighting performance of complex fenestration systems (CFS), enabling greater

115

Distributed Power Electronics for PV Systems (Presentation)  

SciTech Connect (OSTI)

An overview of the benefits and applications of microinverters and DC power optimizers in residential systems. Some conclusions from this report are: (1) The impact of shade is greater than just the area of shade; (2) Additional mismatch losses include panel orientation, panel distribution, inverter voltage window, soiling; (3) Per-module devices can help increase performance, 4-12% or more depending on the system; (4) Value-added benefits (safety, monitoring, reduced design constraints) are helping their adoption; and (5) The residential market is growing rapidly. Efficiency increases, cost reductions are improving market acceptance. Panel integration will further reduce price and installation cost. Reliability remains an unknown.

Deline, C.

2011-12-01T23:59:59.000Z

116

On-Site Wastewater Treatment Systems: Subsurface Drip Distribution  

E-Print Network [OSTI]

A subsurface drip system distributes wastewater to the lawn through a system of tubing installed below the ground. This publication explains the advantages and disadvantages of subsurface drip distribution systems, as well as estimated costs...

Lesikar, Bruce J.

1999-09-06T23:59:59.000Z

117

On-Site Wastewater Treatment Systems: Spray Distribution (Spanish)  

E-Print Network [OSTI]

Spray distribution systems for wastewater treated on site are much like lawn irrigation systems. This publication explains the advantages, disadvantages, maintenance steps and estimated costs of spray distribution systems....

Lesikar, Bruce J.; Enciso, Juan

1999-08-12T23:59:59.000Z

118

Fast time domain simulation for large order hybrid systems  

E-Print Network [OSTI]

Simulation is an important tool for the analysis and design of complex systems. As the models become more and more complex, more powerful simulation methods are desired. As an attempt to address this problem, a simulation ...

Sou, Kin Cheong, 1979-

2002-01-01T23:59:59.000Z

119

Using ductwork to improve supply plenum temperature distribution in underfloor air distribution (UFAD) system  

E-Print Network [OSTI]

overhead air distribution design(1). 1.3 Thermal comfortS. Under Floor Air Distribution (UFAD) Design Guide. s.l. :load design tool for underfloor air distribution systems.

Pasut, Wilmer

2011-01-01T23:59:59.000Z

120

Energy performance of underfloor air distribution systems  

E-Print Network [OSTI]

UnderfloorAirDistribution(UFAD)DesignGuide. Atlanta:distribution,UFAD,EnergyPlus,EnergyPlus/UFAD,energy modeling,designdesigncalculationsmustaccountforthedistributionof

Bauman, Fred; Webster, Tom; Linden, Paul; Buhl, Fred

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Economic analysis of a simulated alley cropping system for semi-arid conditions, using micro computers  

SciTech Connect (OSTI)

Returns were simulated for the semi-arid areas in Mackakos District, Kenya (bimodal rainfall distribution, 600 mm/yr) comparing the present system (maize and beans intercropped twice a year) with a Leucaena leucocephala hedgerow system. Although some of the assumptions contain a large element of uncertainty, the results were promising enough for the system to be considered further. 4 references.

Hoekstra, D.A.

1983-01-01T23:59:59.000Z

122

An Energy-Aware Simulation Model and Transaction Protocol for Dynamic Workload Distribution in Mobile Ad Hoc Networks1  

E-Print Network [OSTI]

An Energy-Aware Simulation Model and Transaction Protocol for Dynamic Workload Distribution California {tari, prong, pedram}@usc.edu Abstract This paper introduces a network simulation model

Pedram, Massoud

123

Guest Editorial: Special Issue on Reliable Distributed Systems  

E-Print Network [OSTI]

Guest Editorial: Special Issue on Reliable Distributed Systems Shambhu J. Upadhyaya, Senior Member, designers, and implementers of distributed systems, with emphasis on system properties such as reliability with the 19th IEEE Symposium on Reliable Distributed Systems held at Nuernberg, Germany, 2000, but the topics

Firenze, Universit degli Studi di

124

Hot Water Distribution System Model Enhancements  

SciTech Connect (OSTI)

This project involves enhancement of the HWSIM distribution system model to more accurately model pipe heat transfer. Recent laboratory testing efforts have indicated that the modeling of radiant heat transfer effects is needed to accurately characterize piping heat loss. An analytical methodology for integrating radiant heat transfer was implemented with HWSIM. Laboratory test data collected in another project was then used to validate the model for a variety of uninsulated and insulated pipe cases (copper, PEX, and CPVC). Results appear favorable, with typical deviations from lab results less than 8%.

Hoeschele, M.; Weitzel, E.

2012-11-01T23:59:59.000Z

125

Distributed Generation Systems Inc | Open Energy Information  

Open Energy Info (EERE)

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 Home5b9fcbce19 No revision has beenFfe2fb55-352f-473b-a2dd-50ae8b27f0a6 No revision has Type TermOpenDistributed Generation Systems

126

A framework for on-line simulation systems  

E-Print Network [OSTI]

Simulation has traditionally been used for off-line planning and design. The advent of computer integrated manufacturing and flexible manufacturing systems has increased interest in shop floor control systems that use simulation technology for real-time...

Drake, Glenn Richardson

1996-01-01T23:59:59.000Z

127

Parallel and Distributed Multi-Algorithm Circuit Simulation  

E-Print Network [OSTI]

With the proliferation of parallel computing, parallel computer-aided design (CAD) has received significant research interests. Transient transistor-level circuit simulation plays an important role in digital/analog circuit design and verification...

Dai, Ruicheng

2012-10-19T23:59:59.000Z

128

Determination of SNe explosions frequency distribution function.Method and numerical simulations  

E-Print Network [OSTI]

The method for determination of the Supernovae (SNe) explosions frequency distribution function based on the assumption of explosions independence are offered. The method is based on assumption that the sequence of SNe explosions in an individual galaxy is a Poisson sequence. The essence of the method is in the determination of statistical moments of the frequency of the SNe explosions and subsequent determination of distribution function . The program of numerical simulation has been developed for testing the efficiency of the method. Numerical simulations show that even for a small mean number of registered SNe explosions, method allows restoring initial distribution function. The results of numerical simulations are given.

A. A. Akopian

2007-05-03T23:59:59.000Z

129

Distributed fiber optic moisture intrusion sensing system  

DOE Patents [OSTI]

Method and system for monitoring and identifying moisture intrusion in soil such as is contained in landfills housing radioactive and/or hazardous waste. The invention utilizes the principle that moist or wet soil has a higher thermal conductance than dry soil. The invention employs optical time delay reflectometry in connection with a distributed temperature sensing system together with heating means in order to identify discrete areas within a volume of soil wherein temperature is lower. According to the invention an optical element and, optionally, a heating element may be included in a cable or other similar structure and arranged in a serpentine fashion within a volume of soil to achieve efficient temperature detection across a large area or three dimensional volume of soil. Remediation, moisture countermeasures, or other responsive action may then be coordinated based on the assumption that cooler regions within a soil volume may signal moisture intrusion where those regions are located.

Weiss, Jonathan D. (Albuquerque, NM)

2003-06-24T23:59:59.000Z

130

Distributed Robust Power System State Estimation  

E-Print Network [OSTI]

Deregulation of energy markets, penetration of renewables, advanced metering capabilities, and the urge for situational awareness, all call for system-wide power system state estimation (PSSE). Implementing a centralized estimator though is practically infeasible due to the complexity scale of an interconnection, the communication bottleneck in real-time monitoring, regional disclosure policies, and reliability issues. In this context, distributed PSSE methods are treated here under a unified and systematic framework. A novel algorithm is developed based on the alternating direction method of multipliers. It leverages existing PSSE solvers, respects privacy policies, exhibits low communication load, and its convergence to the centralized estimates is guaranteed even in the absence of local observability. Beyond the conventional least-squares based PSSE, the decentralized framework accommodates a robust state estimator. By exploiting interesting links to the compressive sampling advances, the latter jointly es...

Kekatos, Vassilis

2012-01-01T23:59:59.000Z

131

Interconnecting PV on New York City's Secondary Network Distribution System  

SciTech Connect (OSTI)

This study describes technical assistance provided by NREL to help New York City and Con Edison improve the interconnection of distributed PV systems on a secondary network distribution system.

Anderson, K.; Coddington, M.; Burman, K.; Hayter, S.; Kroposki, B.; Watson, A.

2009-12-01T23:59:59.000Z

132

On-Site Wastewater Treatment Systems: Subsurface Drip Distribution (Spanish)  

E-Print Network [OSTI]

A subsurface drip system distributes wastewater to the lawn through a system of tubing installed below the ground surface. This publication explains the advantages, disadvantages, maintenance steps and estimated costs of subsurface drip distribution...

Lesikar, Bruce J.; Enciso, Juan

1999-08-12T23:59:59.000Z

133

Evaluating Domestic Hot Water Distribution System Options With Validated Analysis Models  

SciTech Connect (OSTI)

A developing body of work is forming that collects data on domestic hot water consumption, water use behaviors, and energy efficiency of various distribution systems. A full distribution system developed in TRNSYS has been validated using field monitoring data and then exercised in a number of climates to understand climate impact on performance. This study builds upon previous analysis modelling work to evaluate differing distribution systems and the sensitivities of water heating energy and water use efficiency to variations of climate, load, distribution type, insulation and compact plumbing practices. Overall 124 different TRNSYS models were simulated. Of the configurations evaluated, distribution losses account for 13-29% of the total water heating energy use and water use efficiency ranges from 11-22%. The base case, an uninsulated trunk and branch system sees the most improvement in energy consumption by insulating and locating the water heater central to all fixtures. Demand recirculation systems are not projected to provide significant energy savings and in some cases increase energy consumption. Water use is most efficient with demand recirculation systems, followed by the insulated trunk and branch system with a central water heater. Compact plumbing practices and insulation have the most impact on energy consumption (2-6% for insulation and 3-4% per 10 gallons of enclosed volume reduced). The results of this work are useful in informing future development of water heating best practices guides as well as more accurate (and simulation time efficient) distribution models for annual whole house simulation programs.

Weitzel, E.; Hoeschele, M.

2014-09-01T23:59:59.000Z

134

Data Integrity in a Distributed Storage System Jonathan D. Bright  

E-Print Network [OSTI]

Data Integrity in a Distributed Storage System Jonathan D. Bright Sigma Storage Corporation of Connecticut Storrs, CT, U.S.A. Abstract Distributed storage systems must provide highly available access, fault-tolerant algorithms, storage systems, distributed locking 1 Introduction The traditional storage

Chandy, John A.

135

Electric Grid State Estimators for Distribution Systems with Microgrids  

E-Print Network [OSTI]

46556 Emails: {jhuang6,vgupta2,huang}@nd.edu Abstract--In the development of smart grid, state] into the distribution systems of the power grid. Such integration complicates the operation of distribution systemsElectric Grid State Estimators for Distribution Systems with Microgrids Jing Huang, Vijay Gupta

Gupta, Vijay

136

Best Management Practice #3: Distribution System Audits, Leak...  

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

Leaks in distribution systems are caused by a number of factors, including pipe corrosion, high system pressure, construction disturbances, frost damage, damaged joints, and...

137

Carbon and Water Resource Management for Water Distribution Systems  

E-Print Network [OSTI]

the embodied energy in drinking water supply systems: a caselosses to 5% of total drinking water supply for threeResearch Council. Drinking Water Distribution Systems:

Hendrickson, Thomas Peter

2013-01-01T23:59:59.000Z

138

E-Print Network 3.0 - automation simulation system Sample Search...  

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

Summary: Information and Reservation System" "Automated Phone Book Management System" "Simulation of Searching Family... HMI" "Security System Simulator" "Performance Comparison...

139

Architectural Concerns in Distributed and Mobile Collaborative Systems  

E-Print Network [OSTI]

Architectural Concerns in Distributed and Mobile Collaborative Systems Schahram Dustdar Harald Gall Distributed Systems Group, Vienna University of Technology Argentinierstrasse 8/184-1 A-1040 Wien, Austria to integrate Workflow Management Systems (WfMS), Groupware Systems, and Busi- ness Process Modeling Systems

Dustdar, Schahram

140

Cathode power distribution system and method of using the same for power distribution  

DOE Patents [OSTI]

Embodiments include a cathode power distribution system and/or method of using the same for power distribution. The cathode power distribution system includes a plurality of cathode assemblies. Each cathode assembly of the plurality of cathode assemblies includes a plurality of cathode rods. The system also includes a plurality of bus bars configured to distribute current to each of the plurality of cathode assemblies. The plurality of bus bars include a first bus bar configured to distribute the current to first ends of the plurality of cathode assemblies and a second bus bar configured to distribute the current to second ends of the plurality of cathode assemblies.

Williamson, Mark A; Wiedmeyer, Stanley G; Koehl, Eugene R; Bailey, James L; Willit, James L; Barnes, Laurel A; Blaskovitz, Robert J

2014-11-11T23:59:59.000Z

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

A PC simulation of heat transfer and temperature distribution in a circulating wellbore  

E-Print Network [OSTI]

A PC SIMULATION OF HEAT TRANSFER AND TEMPERATURE DISTRIBUTION IN A CIRCULATING WELLBORE A Thesis by ROBERT DUANE PIERCE Submitted to the Graduate College of Texas ARM University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1987 Major Subject: Petroleum Engineering A PC SIMULATION OF HEAT TRANSFER AND TEMPERATURE DISTRIBUTION IN A CIRCULATING WELLBORE A Thesis by ROBERT DUANE PIERCE Approved as to style and content by; Hans C . Juvkam...

Pierce, Robert Duane

1987-01-01T23:59:59.000Z

142

Distributed Sensor Coordination for Advanced Energy Systems  

SciTech Connect (OSTI)

The ability to collect key system level information is critical to the safe, efficient and reli- able operation of advanced energy systems. With recent advances in sensor development, it is now possible to push some level of decision making directly to computationally sophisticated sensors, rather than wait for data to arrive to a massive centralized location before a decision is made. This type of approach relies on networked sensors (called agents from here on) to actively collect and process data, and provide key control deci- sions to significantly improve both the quality/relevance of the collected data and the as- sociating decision making. The technological bottlenecks for such sensor networks stem from a lack of mathematics and algorithms to manage the systems, rather than difficulties associated with building and deploying them. Indeed, traditional sensor coordination strategies do not provide adequate solutions for this problem. Passive data collection methods (e.g., large sensor webs) can scale to large systems, but are generally not suited to highly dynamic environments, such as ad- vanced energy systems, where crucial decisions may need to be reached quickly and lo- cally. Approaches based on local decisions on the other hand cannot guarantee that each agent performing its task (maximize an agent objective) will lead to good network wide solution (maximize a network objective) without invoking cumbersome coordination rou- tines. There is currently a lack of algorithms that will enable self-organization and blend the efficiency of local decision making with the system level guarantees of global decision making, particularly when the systems operate in dynamic and stochastic environments. In this work we addressed this critical gap and provided a comprehensive solution to the problem of sensor coordination to ensure the safe, reliable, and robust operation of advanced energy systems. The differentiating aspect of the proposed work is in shift- ing the focus towards what to observe rather than how to observe in large sensor networks, allowing the agents to actively determine both the structure of the network and the relevance of the information they are seeking to collect. In addition to providing an implicit coordination mechanism, this approach allows the system to be reconfigured in response to changing needs (e.g., sudden external events requiring new responses) or changing sensor network characteristics (e.g., sudden changes to plant condition). Outcome Summary: All milestones associated with this project have been completed. In particular, private sensor objective functions were developed which are aligned with the global objective function, sensor effectiveness has been improved by using sensor teams, system efficiency has been improved by 30% using difference evaluation func- tions, we have demonstrated system reconfigurability for 20% changes in system con- ditions, we have demonstrated extreme scalability of our proposed algorithm, we have demonstrated that sensor networks can overcome disruptions of up to 20% in network conditions, and have demonstrated system reconfigurability to 20% changes in system conditions in hardware-based simulations. This final report summarizes how each of these milestones was achieved, and gives insight into future research possibilities past the work which has been completed. The following publications support these milestones [6, 8, 9, 10, 16, 18, 19].

Tumer, Kagan

2013-07-31T23:59:59.000Z

143

Modeling of underfloor air distribution (UFAD) systems.  

E-Print Network [OSTI]

open office space and an adjoining weather chamber that allowed us to simulate solar gain and window heat transfer.

Webster, Tom; Bauman, Fred; Buhl, Fred; Daly, Allan

2008-01-01T23:59:59.000Z

144

Detection of contamination of municipal water distribution systems  

DOE Patents [OSTI]

A system for the detection of contaminates of a fluid in a conduit. The conduit is part of a fluid distribution system. A chemical or biological sensor array is connected to the conduit. The sensor array produces an acoustic signal burst in the fluid upon detection of contaminates in the fluid. A supervisory control system connected to the fluid and operatively connected to the fluid distribution system signals the fluid distribution system upon detection of contaminates in the fluid.

Cooper, John F. (Oakland, CA)

2012-01-17T23:59:59.000Z

145

CHP and CHPsim: A Language and Simulator for Fine-Grain Distributed Computation  

E-Print Network [OSTI]

1 CHP and CHPsim: A Language and Simulator for Fine-Grain Distributed Computation Alain J. Martin Abstract--This paper describes a complete and stable version of CHP and the simulator CHPsim. CHP partial versions of the language are already widely used, but CHP has never been presented as a complete

Martin, Alain

146

Model Based Commissioning Tool for Air-Conditioning Distribution Systems-APCBC  

E-Print Network [OSTI]

of VWV System 4. Example of VAV System 5. Conclusions 2 ESL-IC-14-09-06 Proceedings of the 14th International Conference for Enhanced Building Operations, Beijing, China, September 14-17, 2014 ? Energy consumption of air and water distribution in air...-09-06 Proceedings of the 14th International Conference for Enhanced Building Operations, Beijing, China, September 14-17, 2014 1. Issues 2. Simulation Model of Distribution System 3. Example of VWV System 4. Example of VAV System 5. Conclusions 7 ESL-IC-14...

Yoshida, H.; Noda, T.

2014-01-01T23:59:59.000Z

147

Simulating calculations and optimization design of a new HVDC supply power for light rail system  

E-Print Network [OSTI]

such a complex system, taking into account vehicle motion and HVDC electrical distribution. Then, an optimizationSimulating calculations and optimization design of a new HVDC supply power for light rail system Rémi Vial, Delphine Riu, Nicolas Retière Grenoble Electrical Engineering Laboratory, 38402 Saint

Boyer, Edmond

148

Impact of Distributed Wind on Bulk Power System Operations in ISO-NE (Presentation)  

SciTech Connect (OSTI)

The work presented in the paper corresponding to this presentation aims to study the impact of a range of penetration levels of distributed wind on the operation of the electric power system at the transmission level. This presentation is an overview of a case study on the power system in Independent System Operator New England. It is analyzed using PLEXOS, a commercial power system simulation tool

Brancucci Martinez-Anido, C.; Hodge, B. M.; Palchak, D.; Miettinen, J.

2014-11-01T23:59:59.000Z

149

From Balanced Initial Occupant Distribution to Balanced Exit Usage in a Simulation Model of Pedestrian Dynamics  

E-Print Network [OSTI]

It is tested in this contribution if and to which extend a method of a pedestrian simulation tool that attempts to make pedestrians walk into the direction of estimated earliest arrival can help to automatically distribute pedestrians - who are initially distributed arbitrarily in the scenario - equally on the various exits of the scenario.

Kretz, Tobias

2012-01-01T23:59:59.000Z

150

Interoperable simulation gaming for strategic infrastructure systems design  

E-Print Network [OSTI]

Infrastructure systems are large physical networks of interrelated components which produce and distribute resources to meet societal needs. Meeting future sustainability objectives may require more complex systems with ...

Grogan, Paul Thomas, 1985-

2014-01-01T23:59:59.000Z

151

Cost Modeling and Design Techniques for Integrated Package Distribution Systems  

E-Print Network [OSTI]

Cost Modeling and Design Techniques for Integrated Package Distribution Systems Karen R. Smilowitz and Carlos F. Daganzo December 23, 2005 Abstract Complex package distribution systems are designed using-scale integrated distribution networks. While the network design problem is quite complex, we demonstrate

Smilowitz, Karen

152

Cost Modeling and Design Techniques for Integrated Package Distribution Systems  

E-Print Network [OSTI]

Cost Modeling and Design Techniques for Integrated Package Distribution Systems Karen R. Smilowitz and Carlos F. Daganzo June 27, 2002 Abstract Complex package distribution systems are designed using idealizations of network geometries, operating costs, demand and customer distributions, and routing patterns

Daganzo, Carlos F.

153

Opis: Reliable Distributed Systems in OCaml Pierre-Evariste Dagand  

E-Print Network [OSTI]

Opis: Reliable Distributed Systems in OCaml Pierre-Evariste Dagand ENS Cachan-Bretagne, France concurrent and distributed systems, making them more widespread and more reliable. Among several models and imple- mentation challenges in developing reliable distributed sys- tems, making the field an excellent

Kuncak, Viktor

154

STATE OF CALIFORNIA DISTRIBUTED ENERGY STORAGE DX AC SYSTEMES ACCEPTANCE  

E-Print Network [OSTI]

STATE OF CALIFORNIA DISTRIBUTED ENERGY STORAGE DX AC SYSTEMES ACCEPTANCE CEC-MECH-14A (Revised 08/09) CALIFORNIA ENERGY COMMISSION CERTIFICATE OF ACCEPTANCE MECH-14A NA7.5.13 Distributed Energy Storage DX AC DISTRIBUTED ENERGY STORAGE DX AC SYSTEMES ACCEPTANCE CEC-MECH-14A (Revised 08/09) CALIFORNIA ENERGY COMMISSION

155

RELIABILITY PLANNING IN DISTRIBUTED ELECTRIC ENERGY SYSTEMS  

E-Print Network [OSTI]

RESILIENCE; OR RELIABILITY SENSITIVITy .. RiskReliability Planning: Preliminary Definitions.Dioision, Ext. 6782 Reliability Planning in Distributed

Kahn, E.

2011-01-01T23:59:59.000Z

156

Simulating Complex Window Systems using BSDF Data  

E-Print Network [OSTI]

Daylighting, Design tools and methods INTRODUCTION Simulations enable designers and engineers to evaluate and select the best available window solutions

Konstantoglou, Maria

2011-01-01T23:59:59.000Z

157

RELIABILITY PLANNING IN DISTRIBUTED ELECTRIC ENERGY SYSTEMS  

E-Print Network [OSTI]

and deal only with solar cogeneration units that are assumedand Distributed. cogeneration). These provide just underparameters. as conventional cogeneration units. technologies

Kahn, E.

2011-01-01T23:59:59.000Z

158

Dynamically Quantifying and Improving the Reliability of Distributed Storage Systems  

E-Print Network [OSTI]

Dynamically Quantifying and Improving the Reliability of Distributed Storage Systems Rekha Bachwani-scale storage systems can be significantly improved by using bet- ter reliability metrics and more efficient on a distributed storage system based on erasure codes. We find that MinI improves relia- bility significantly

Bianchini, Ricardo

159

Maximizing Service Reliability in Distributed Computing Systems with Random Node  

E-Print Network [OSTI]

Maximizing Service Reliability in Distributed Computing Systems with Random Node Failures: Theory Member, IEEE Abstract--In distributed computing systems (DCSs) where server nodes can fail permanently with nonzero probability, the system performance can be assessed by means of the service reliability, defined

Hayat, Majeed M.

160

Managing Uncertainty in Operational Control of Water Distribution Systems  

E-Print Network [OSTI]

Managing Uncertainty in Operational Control of Water Distribution Systems A. Bargiela Department. There are system management decisions concerning the regulatory measures such as water pricing principles, effluent in water distribution systems con- cern reservoir(s) management with associated pump scheduling

Bargiela, Andrzej

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

A Runtime Verification Framework for Control System Simulation  

SciTech Connect (OSTI)

n a standard workflow for the validation of a control system, the control system is implemented as an extension to a simulator. Such simulators are complex software systems, and engineers may unknowingly violate constraints a simulator places on extensions. As such, errors may be introduced in the implementation of either the control system or the simulator leading to invalid simulation results. This paper presents a novel runtime verification approach for verifying control system implementations within simulators. The major contribution of the approach is the two-tier specification process. In the first tier, engineers model constraints using a domain-specific language tailored to modeling a controllers response to changes in its input. The language is high-level and effectively hides the implementation details of the simulator, allowing engineers to specify design-level constraints independent of low-level simulator interfaces. In the second tier, simulator developers provide mapping rules for mapping design-level constraints to the implementation of the simulator. Using the rules, an automated tool transforms the design-level specifications into simulator-specific runtime verification specifications and generates monitoring code which is injected into the implementation of the simulator. During simulation, these monitors observe the input and output variables of the control system and report changes to the verifier. The verifier checks whether these changes follow the constraints of the control system. We describe application of this approach to the verification of the constraints of an HVAC control system implemented with the power grid simulator GridLAB-D.

Ciraci, Selim; Fuller, Jason C.; Daily, Jeffrey A.; Makhmalbaf, Atefe; Callahan, Charles D.

2014-08-02T23:59:59.000Z

162

Engineering Incentives in Distributed Systems with Healthcare Applications  

E-Print Network [OSTI]

ENGINEERING INCENTIVES IN DISTRIBUTED SYSTEMS WITH HEALTHCARE APPLICATIONS A Dissertation by BRANDON REED POPE Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree... of DOCTOR OF PHILOSOPHY August 2011 Major Subject: Industrial Engineering Engineering Incentives in Distributed Systems with Healthcare Applications Copyright 2011 Brandon Reed Pope ENGINEERING INCENTIVES IN DISTRIBUTED SYSTEMS WITH HEALTHCARE...

Pope, Brandon 1984-

2011-07-15T23:59:59.000Z

163

System Simulations of Hybrid Electric Vehicles with Focus on...  

Broader source: Energy.gov (indexed) [DOE]

System Simulations of Hybrid Electric Vehicles with Focus on Emissions Zhiming Gao Veerathu K. Chakravarthy Josh Pihl C. Stuart Daw Maruthi Devarakonda Jong Lee...

164

Mesoscale Simulations of Particulate Flows with Parallel Distributed Lagrange Multiplier Technique  

SciTech Connect (OSTI)

Fluid particulate flows are common phenomena in nature and industry. Modeling of such flows at micro and macro levels as well establishing relationships between these approaches are needed to understand properties of the particulate matter. We propose a computational technique based on the direct numerical simulation of the particulate flows. The numerical method is based on the distributed Lagrange multiplier technique following the ideas of Glowinski et al. (1999). Each particle is explicitly resolved on an Eulerian grid as a separate domain, using solid volume fractions. The fluid equations are solved through the entire computational domain, however, Lagrange multiplier constrains are applied inside the particle domain such that the fluid within any volume associated with a solid particle moves as an incompressible rigid body. Mutual forces for the fluid-particle interactions are internal to the system. Particles interact with the fluid via fluid dynamic equations, resulting in implicit fluid-rigid-body coupling relations that produce realistic fluid flow around the particles (i.e., no-slip boundary conditions). The particle-particle interactions are implemented using explicit force-displacement interactions for frictional inelastic particles similar to the DEM method of Cundall et al. (1979) with some modifications using a volume of an overlapping region as an input to the contact forces. The method is flexible enough to handle arbitrary particle shapes and size distributions. A parallel implementation of the method is based on the SAMRAI (Structured Adaptive Mesh Refinement Application Infrastructure) library, which allows handling of large amounts of rigid particles and enables local grid refinement. Accuracy and convergence of the presented method has been tested against known solutions for a falling sphere as well as by examining fluid flows through stationary particle beds (periodic and cubic packing). To evaluate code performance and validate particle contact physics algorithm, we performed simulations of a representative experiment conducted at the University of California at Berkley for pebble flow through a narrow opening.

Kanarska, Y

2010-03-24T23:59:59.000Z

165

A View on Future Building System Modeling and Simulation  

SciTech Connect (OSTI)

This chapter presents what a future environment for building system modeling and simulation may look like. As buildings continue to require increased performance and better comfort, their energy and control systems are becoming more integrated and complex. We therefore focus in this chapter on the modeling, simulation and analysis of building energy and control systems. Such systems can be classified as heterogeneous systems because they involve multiple domains, such as thermodynamics, fluid dynamics, heat and mass transfer, electrical systems, control systems and communication systems. Also, they typically involve multiple temporal and spatial scales, and their evolution can be described by coupled differential equations, discrete equations and events. Modeling and simulating such systems requires a higher level of abstraction and modularisation to manage the increased complexity compared to what is used in today's building simulation programs. Therefore, the trend towards more integrated building systems is likely to be a driving force for changing the status quo of today's building simulation programs. Thischapter discusses evolving modeling requirements and outlines a path toward a future environment for modeling and simulation of heterogeneous building systems.A range of topics that would require many additional pages of discussion has been omitted. Examples include computational fluid dynamics for air and particle flow in and around buildings, people movement, daylight simulation, uncertainty propagation and optimisation methods for building design and controls. For different discussions and perspectives on the future of building modeling and simulation, we refer to Sahlin (2000), Augenbroe (2001) and Malkawi and Augenbroe (2004).

Wetter, Michael

2011-04-01T23:59:59.000Z

166

A High Performance Computing Network and System Simulator for the Power Grid: NGNS^2  

SciTech Connect (OSTI)

Designing and planing next generation power grid sys- tems composed of large power distribution networks, monitoring and control networks, autonomous generators and consumers of power requires advanced simulation infrastructures. The objective is to predict and analyze in time the behavior of networks of systems for unexpected events such as loss of connectivity, malicious attacks and power loss scenarios. This ultimately allows one to answer questions such as: What could happen to the power grid if .... We want to be able to answer as many questions as possible in the shortest possible time for the largest possible systems. In this paper we present a new High Performance Computing (HPC) oriented simulation infrastructure named Next Generation Network and System Simulator (NGNS2 ). NGNS2 allows for the distribution of a single simulation among multiple computing elements by using MPI and OpenMP threads. NGNS2 provides extensive configuration, fault tolerant and load balancing capabilities needed to simulate large and dynamic systems for long periods of time. We show the preliminary results of the simulator running approximately two million simulated entities both on a 64-node commodity Infiniband cluster and a 48-core SMP workstation.

Villa, Oreste; Tumeo, Antonino; Ciraci, Selim; Daily, Jeffrey A.; Fuller, Jason C.

2012-11-11T23:59:59.000Z

167

An integrated optimal design method for utility power distribution systems.  

E-Print Network [OSTI]

??This dissertation presents a comprehensive and integrated design methodology to optimize both the electrical and the economic performance of a utility power distribution system. The (more)

Fehr, Ralph E

2005-01-01T23:59:59.000Z

168

Sensor Networks for Monitoring and Control of Water Distribution Systems  

E-Print Network [OSTI]

Water distribution systems present a significant challenge for structural monitoring. They comprise a complex network of pipelines buried underground that are relatively inaccessible. Maintaining the integrity of these ...

Whittle, Andrew

169

Laser spark distribution and ignition system - Energy Innovation...  

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

power pulse. The laser spark distribution and ignition system has application in natural gas fueled reciprocating engines, turbine combustors, explosives and laser induced...

170

Educational systems need appropriate animations and simulations Ruddy LELOUCHE  

E-Print Network [OSTI]

-mail: LELOUCHE@IFT.ULAVAL.CA Abstract Animations and simulations are often presented as tools for learning in a simulation-based system to help practising and learning algorithmics. Finally, the paper proposes a guideline, learning activity, knowledge type. Rsum Les animations et les simulations sont souvent prsentes comme

Paris-Sud XI, Universit de

171

Explosive simulants for testing explosive detection systems  

DOE Patents [OSTI]

Explosives simulants that include non-explosive components are disclosed that facilitate testing of equipment designed to remotely detect explosives. The simulants are non-explosive, non-hazardous materials that can be safely handled without any significant precautions. The simulants imitate real explosives in terms of mass density, effective atomic number, x-ray transmission properties, and physical form, including moldable plastics and emulsions/gels.

Kury, John W. (Danville, CA); Anderson, Brian L. (Lodi, CA)

1999-09-28T23:59:59.000Z

172

NiSource Energy Technologies Inc.: System Integration of Distributed Power for Complete Building Systems  

SciTech Connect (OSTI)

Summarizes NiSource Energy Technologies' work under contract to DOE's Distribution and Interconnection R&D. Includes studying distributed generation interconnection issues and CHP system performance.

Not Available

2003-10-01T23:59:59.000Z

173

Century Electric Distribution System Operations Lorenzo Kristov,1  

E-Print Network [OSTI]

May 2014 1 21st Century Electric Distribution System Operations Lorenzo Kristov,1 California adoption of distribution energy technologies. All of this has occurred during a period of increasing of Renewable and Distributed Energy Resources, Caltech Resnick Institute, 2012 #12;May 2014 2 and wholesale

Low, Steven H.

174

State Control Design for Linear Systems with Distributed Time Delays  

E-Print Network [OSTI]

State Control Design for Linear Systems with Distributed Time Delays Daniel Gontkovic and Róbert with distributed time delays. Using an extended form of the Lyapunov- Krasovskii functional the controller design involving distributed time delays is a problem of large practical interest where intensive activity are done

Paris-Sud XI, Université de

175

Designing Directories in Distributed Systems: A Systematic Framework  

E-Print Network [OSTI]

Designing Directories in Distributed Systems: A Systematic Framework K. Mani Chandy and Eve M of directory­based distributed applications. We evaluate a space of directory designs using our frame­ work. We distributed applications, including directory design. We propose a weaker con­ cept: estimation. We define

176

Simulation of Thermal Plant Optimization and Hydraulic Aspects of Thermal Distribution Loops for Large Campuses  

E-Print Network [OSTI]

is designed specifically for the Texas A&M University utilities system to simulate its operation, to perform thermo-economic cost analysis, and to suggest optimal operation alternatives. Chapter IX is about the simulation of a gas turbine and the heat... separately. ESL-TH-04-05-03 23 Thermodynamic Performance Analysis TABLE 1 provides an annual overall summary of TAMU utilities system energy conversion performance for the year 2002. TABLE 1 TAMU Utilities System Energy Consumption and Production...

Chen, Q.

177

Multiport Converter Topologies for Distributed Energy System Applications  

E-Print Network [OSTI]

Distributed Energy Resource Systems DF Different Frequency EDLC Electronic Doubly Layer Capacitor EMI Electromagnetic Interference ESD Energy Storage Device FC Fuel Cell H Henry HES Hybrid Energy Storage System HF High Frequency HFI High Frequency...

Hawke, Joshua

2014-07-28T23:59:59.000Z

178

Simulation methods for the development of modular strategic guidance systems  

E-Print Network [OSTI]

The traditional approach to simulation-based system design results in a stovepiped development process where subsystems are developed independently and integration requirements are then levied on the system architecture. ...

Long, Stephen Michael, Ensign

2003-01-01T23:59:59.000Z

179

The Simulation of Synchronous Reactive Systems In Ptolemy II  

E-Print Network [OSTI]

The Simulation of Synchronous Reactive Systems In Ptolemy II by Paul Whitaker Submitted to the Department of Electrical Engineering and Computer Sciences, University of California at Berkeley, in partial;_____________________________________________________________________ Simulation of Synchronous Reactive Systems in Ptolemy II ii Abstract The Synchronous Reactive (SR) domain

180

Simulation of IPA Gradients in Hybrid Network Systems Benjamin Melamed  

E-Print Network [OSTI]

Simulation of IPA Gradients in Hybrid Network Systems Benjamin Melamed Rutgers University Rutgers Atlanta, GA 30332 October 26, 2005 Abstract Infinitesimal Perturbation Analysis (IPA) provides formulas paths of stochastic systems. In practice, IPA derivatives may be computed either from simulation runs

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Dynamic wind turbine models in power system simulation tool  

E-Print Network [OSTI]

Dynamic wind turbine models in power system simulation tool DIgSILENT Anca D. Hansen, Florin Iov Iov, Poul Sørensen, Nicolaos Cutululis, Clemens Jauch, Frede Blaabjerg Title: Dynamic wind turbine system simulation tool PowerFactory DIgSILENT for different wind turbine concepts. It is the second

182

THE DEVELOPMENT OF DISTRI-bution systems poses new challenges  

E-Print Network [OSTI]

are covered in a separate article. The six articles in this issue review the past, present, and the future level to respond to new energy challenges and the restruc- tured environment. The need for a change in the distribution systems of the 21st century. The Past Toward the end of the 19th century, dc distribution systems

Dixon, Juan

183

Coping with dependent failures in distributed systems  

E-Print Network [OSTI]

election, as well as practical applications, such as replication in multi-site systems and cooperative

Junqueira, Flavio

2006-01-01T23:59:59.000Z

184

Simulation Models for Improved Water Heating Systems  

E-Print Network [OSTI]

and Simulation of a Smart Water Heater. In Workshop inFreezers, Furnaces, Water Heaters, Room and Central AirNovember. ADL. 1982b. Water Heater Computer Model Users

Lutz, Jim

2014-01-01T23:59:59.000Z

185

An analysis of distributed solar fuel systems  

E-Print Network [OSTI]

While solar fuel systems offer tremendous potential to address global clean energy needs, most existing analyses have focused on the feasibility of large centralized systems and applications. Not much research exists on ...

Thomas, Alex, S.M. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

186

PhotoVoltaic distributed generation for Lanai power grid real-time simulation and control integration scenario.  

SciTech Connect (OSTI)

This paper discusses the modeling, analysis, and testing in a real-time simulation environment of the Lanai power grid system for the integration and control of PhotoVoltaic (PV) distributed generation. The Lanai Island in Hawaii is part of the Hawaii Clean Energy Initiative (HCEI) to transition to 30% renewable green energy penetration by 2030. In Lanai the primary loads come from two Castle and Cook Resorts, in addition to residential needs. The total peak load profile is 12470 V, 5.5 MW. Currently there are several diesel generators that meet these loading requirements. As part of the HCEI, Lanai has initially installed 1.2 MW of PV generation. The goal of this study has been to evaluate the impact of the PV with respect to the conventional carbon-based diesel generation in real time simulation. For intermittent PV distributed generation, the overall stability and transient responses are investigated. A simple Lanai 'like' model has been developed in the Matlab/Simulink environment (see Fig. 1) and to accommodate real-time simulation of the hybrid power grid system the Opal-RT Technologies RT-Lab environment is used. The diesel generators have been modelled using the SimPowerSystems toolbox swing equations and a custom Simulink module has been developed for the High level PV generation. All of the loads have been characterized primarily as distribution lines with series resistive load banks with one VAR load bank. Three-phase faults are implemented for each bus. Both conventional and advanced control architectures will be used to evaluate the integration of the PV onto the current power grid system. The baseline numerical results include the stable performance of the power grid during varying cloud cover (PV generation ramping up/down) scenarios. The importance of assessing the real-time scenario is included.

Robinett, Rush D., III; Kukolich, Keith (Opal RT Technologies, Montreal, Quebec, Canada); Wilson, David Gerald; Schenkman, Benjamin L.

2010-06-01T23:59:59.000Z

187

Distributed Dynamics of Systems with Closed Kinematic Chains  

E-Print Network [OSTI]

) ­ Orin and Walker (1982): Efficient dynamic computer simulation of robotic mechanisms ­ Featherstone block predictor-corrector methods of ODE's Chain-level distribution ­ McMillan, Sadayappan and Orin Two NASA robots carrying a metal beam (a) (b) Figure 2.10: ARNOLD, MDOF vehicle with compliant linkage

Krovi, Venkat

188

CFD Simulation and Measurement Validation of Air Distribution at the Hunan International Exhibition Center  

E-Print Network [OSTI]

The Hunan International Exhibition Center (HIEC) is a large space building. A stratified air-conditioning system on the second floor of the building has been adopted. Due to some problems with the air supply jet diffuser, CFD simulations were...

Deng, T.; Zhang, Q.; Zhang, G.; Yuan, H.

2006-01-01T23:59:59.000Z

189

Driven harmonic oscillator as a quantum simulator for open systems  

E-Print Network [OSTI]

We show theoretically how a driven harmonic oscillator can be used as a quantum simulator for non-Markovian damped harmonic oscillator. In the general framework, the results demonstrate the possibility to use a closed system as a simulator for open quantum systems. The quantum simulator is based on sets of controlled drives of the closed harmonic oscillator with appropriately tailored electric field pulses. The non-Markovian dynamics of the damped harmonic oscillator is obtained by using the information about the spectral density of the open system when averaging over the drives of the closed oscillator. We consider single trapped ions as a specific physical implementation of the simulator, and we show how the simulator approach reveals new physical insight into the open system dynamics, e.g. the characteristic quantum mechanical non-Markovian oscillatory behavior of the energy of the damped oscillator, usually obtained by the non-Lindblad-type master equation, can have a simple semiclassical interpretation.

Jyrki Piilo; Sabrina Maniscalco

2006-10-03T23:59:59.000Z

190

Minimizing Energy Consumption in a Water Distribution System: A Systems Modeling Approach  

E-Print Network [OSTI]

In a water distribution system from groundwater supply, the bulk of energy consumption is expended at pump stations. These pumps pressurize the water and transport it from the aquifer to the distribution system and to elevated storage tanks. Each...

Johnston, John

2011-08-08T23:59:59.000Z

191

Hybrid Control Network Intrusion Detection Systems for Automated Power Distribution Systems  

E-Print Network [OSTI]

Security protocols against cyber attacks in the distributioncyber security weak- ness and system fragility of power distribution

Parvania, Masood; Koutsandria, Georgia; Muthukumar, Vishak; Peisert, Sean; McParland, Chuck; Scaglione, Anna

2014-01-01T23:59:59.000Z

192

Concurrency control in heterogeneous distributed database systems  

E-Print Network [OSTI]

APPROACHES IN HDDBS . III. A Approaches Requiring Local DBMS Modihcations 17 19 III. B Approaches Without Local DBMS Modifications 22 IV A NEW APPROACH TO HDDBS CONCURRENCY CONTROL 30 IV. A The Concurrency Control Scheme 30 CIIA PTER Page IV. B... related to Database Systems in general which will be used consistently throughout this thesis. A Database system (DBS) consists of a set of dutiibiises (DB) which contain the data of interest and software, the database msnageinent system (DBMS), which...

Rahman, Md. Rezaur

1992-01-01T23:59:59.000Z

193

RELIABILITY PLANNING IN DISTRIBUTED ELECTRIC ENERGY SYSTEMS  

E-Print Network [OSTI]

applied to the case of hydroelectric facilities with large3. For comparison, the hydroelectric system in California asas droughts which reduce hydroelectric energy availability,

Kahn, E.

2011-01-01T23:59:59.000Z

194

Distributionally robust control of constrained stochastic systems  

E-Print Network [OSTI]

We investigate the control of constrained stochastic linear systems when faced ...... 5 The flat plate model is parametrised by a half chord length of b, a distance...

2013-05-01T23:59:59.000Z

195

Laser Spark Distribution and Ignition System  

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

laser spark from a single low power pulse. The system has ap- plications in natural gas fueled reciprocating engines, turbine combustors, explosives, and laser induced...

196

Integrated Distribution Management System for Alabama Principal Investigator  

SciTech Connect (OSTI)

Southern Company Services, under contract with the Department of Energy, along with Alabama Power, Alstom Grid (formerly AREVA T&D) and others moved the work product developed in the first phase of the Integrated Distribution Management System (IDMS) from Proof of Concept to true deployment through the activity described in this Final Report. This Project Integrated Distribution Management Systems in Alabama advanced earlier developed proof of concept activities into actual implementation and furthermore completed additional requirements to fully realize the benefits of an IDMS. These tasks include development and implementation of a Distribution System based Model that enables data access and enterprise application integration.

Schatz, Joe

2013-03-31T23:59:59.000Z

197

Reactor Subsystem Simulation for Nuclear Hybrid Energy Systems  

SciTech Connect (OSTI)

Preliminary system models have been developed by Idaho National Laboratory researchers and are currently being enhanced to assess integrated system performance given multiple sources (e.g., nuclear + wind) and multiple applications (i.e., electricity + process heat). Initial efforts to integrate a Fortran-based simulation of a small modular reactor (SMR) with the balance of plant model have been completed in FY12. This initial effort takes advantage of an existing SMR model developed at North Carolina State University to provide initial integrated system simulation for a relatively low cost. The SMR subsystem simulation details are discussed in this report.

Shannon Bragg-Sitton; J. Michael Doster; Alan Rominger

2012-09-01T23:59:59.000Z

198

Modeling and Verification of Distributed Generation and Voltage Regulation Equipment for Unbalanced Distribution Power Systems; Annual Subcontract Report, June 2007  

SciTech Connect (OSTI)

This report summarizes the development of models for distributed generation and distribution circuit voltage regulation equipment for unbalanced power systems and their verification through actual field measurements.

Davis, M. W.; Broadwater, R.; Hambrick, J.

2007-07-01T23:59:59.000Z

199

Seismic Fragility of the LANL Fire Water Distribution System  

SciTech Connect (OSTI)

The purpose of this report is to present the results of a site-wide system fragility assessment. This assessment focuses solely on the performance of the water distribution systems that supply Chemical and Metallurgy Research (CMR), Weapons Engineering and Tritium Facility (WETF), Radioactive Liquid Waste Treatment Facility (RLWTF), Waste Characterization, Reduction, Repackaging Facility (WCRRF), and Transuranic Waste Inspectable Storage Project (TWISP). The analysis methodology is based on the American Lifelines Alliance seismic fragility formulations for water systems. System fragilities are convolved with the 1995 LANL seismic hazards to develop failure frequencies. Acceptance is determined by comparing the failure frequencies to the DOE-1020 Performance Goals. This study concludes that: (1) If a significant number of existing isolation valves in the water distribution system are closed to dedicate the entire water system to fighting fires in specific nuclear facilities; (2) Then, the water distribution systems for WETF, RLWTF, WCRRF, and TWISP meet the PC-2 performance goal and the water distribution system for CMR is capable of surviving a 0.06g earthquake. A parametric study of the WETF water distribution system demonstrates that: (1) If a significant number of valves in the water distribution system are NOT closed to dedicate the entire water system to fighting fires in WETF; (2) Then, the water distribution system for WETF has an annual probability of failure on the order of 4 x 10{sup -3} that does not meet the PC-2 performance goal. Similar conclusions are expected for CMR, RLWTF, WCRRF, and TWISP. It is important to note that some of the assumptions made in deriving the results should be verified by personnel in the safety-basis office and may need to be incorporated in technical surveillance requirements in the existing authorization basis documentation if credit for availability of fire protection water is taken at the PC-2 level earthquake levels. Assumptions are presented in Section 2.2 of this report.

Greg Mertz

2007-03-30T23:59:59.000Z

200

Voices of Experience | Advanced Distribution Management Systems...  

Office of Environmental Management (EM)

systems that are unable to integrate with new technologies and that sta can no longer support. 4. Regulation-the ability to accommodate changes that encourage reliability and e...

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

RELIABILITY PLANNING IN DISTRIBUTED ELECTRIC ENERGY SYSTEMS  

E-Print Network [OSTI]

mean value of load and its variance as follows: where W =as a function of load for a given system. This follows fromto some load W. We can write this as follows: LOLP = Prob [

Kahn, E.

2011-01-01T23:59:59.000Z

202

RELIABILITY PLANNING IN DISTRIBUTED ELECTRIC ENERGY SYSTEMS  

E-Print Network [OSTI]

Problems and Research Needs, EPRI EL-377-SR, February 1977.Electric Utility Systems, EPRI, EM-336, November, 1976. 24.of Large Generating Units EPRI WS-77-50, February 1978.

Kahn, E.

2011-01-01T23:59:59.000Z

203

PowerSystemsSimulation NSERC Industrial Research Chair in  

E-Print Network [OSTI]

an offshore wind power plant to an onshore grid. To develop a PSCAD/EMTDC simulation model of an offshore WPPPowerSystemsSimulation NSERC Industrial Research Chair in Legends: 1. Without negative sequence, Aalborg Univ. and Univ. of Manitoba, email:skc@et.aau.dk A 400MW offshore wind power plant has been

Chaudhary, Sanjay

204

Na, Mg, Ni and Cs distribution and speciation after long-term alteration of a simulated nuclear waste glass  

E-Print Network [OSTI]

distribution and speciation of Na, Mg, Ni and Cs in a simulated (inactive) nuclear waste glass were studied and Cs represent dose determining long-lived radionuclides (59 Ni, 135 Cs) in vitrified nuclear wasteNa, Mg, Ni and Cs distribution and speciation after long-term alteration of a simulated nuclear

205

Dynamic Interactions of PV units in Low Volatge Distribution Systems  

E-Print Network [OSTI]

. Abstract--Photovoltaic (PV) units along with other distributed energy resources (DERs) are located close by minimizing the negative interactions. Index Terms--Photovoltaic, negative interactions, distribution systems different DERs may react negatively and degrade reliability. There are several different measures

Pota, Himanshu Roy

206

Collaborative Creativity: A Complex Systems Model with Distributed Affect  

E-Print Network [OSTI]

Collaborative Creativity: A Complex Systems Model with Distributed Affect Cecilia R. Aragon E16 2RD UK alisonwilliams62@googlemail.com ABSTRACT The study of creativity has received significant attention over the past century, with a recent increase in interest in collaborative, distributed creativity

Anderson, Richard

207

A Smart Energy System: Distributed Resource Management, Control and Optimization  

E-Print Network [OSTI]

A Smart Energy System: Distributed Resource Management, Control and Optimization Yong Ding, Student of distributed energy resource and consumption management, which proposes to design a networked and embedded platform for realizing a dynamic energy mix and optimizing the energy consumption dy- namically. Based

Beigl, Michael

208

Identifying Transformer Incipient Events for Maintaining Distribution System Reliability  

E-Print Network [OSTI]

Identifying Transformer Incipient Events for Maintaining Distribution System Reliability Karen L events in single-phase distribution transformers. This analysis will aid in the development of an automatic detection method for internal incipient faults in the transformers. The detection method can

209

Centralized and Distributed Generated Power Systems -A Comparison Approach  

E-Print Network [OSTI]

Energy System #12;Centralized and Distributed Generated Power Systems - A Comparison Approach Prepared for the Project "The Future Grid to Enable Sustainable Energy Systems" Funded by the U.S. Department of Energy Robert Saint National Rural Electric Cooperative Association PSERC Publication 12-08 June 2012 #12;For

210

Leader Election in Asynchronous Distributed Systems Scott D. Stoller  

E-Print Network [OSTI]

Leader Election in Asynchronous Distributed Systems Scott D. Stoller March 9, 2000 Abstract cation, which is satis ed by the Invitation Algorithm and never forces nodes that cannot directly

Stoller, Scott

211

Modeling the Effect of Hurricanes on Power Distribution Systems  

E-Print Network [OSTI]

There are many calamitous events such as earthquakes, hurricanes, tsunamis etc. that occur suddenly and cause great loss of life, damage, or hardship. Hurricanes cause significant damage to power distribution systems, resulting in prolonged customer...

Chanda, Suraj

2012-10-19T23:59:59.000Z

212

Impact of SolarSmart Subdivisions on SMUD's Distribution System  

SciTech Connect (OSTI)

This study analyzes the distribution impacts of high penetrations of grid-integrated renewable energy systems, specifically photovoltaic (PV) equipped SolarSmart Homes found in the Anatolia III Residential Community.

McNutt, P.; Hambrick, J.; Keesee, M.; Brown, D.

2009-07-01T23:59:59.000Z

213

Power-Demand Routing in massive geo-distributed systems  

E-Print Network [OSTI]

There is an increasing trend toward massive, geographically distributed systems. The largest Internet companies operate hundreds of thousands of servers in multiple geographic locations, and are growing at a fast clip. A ...

Qureshi, Asfandyar

2010-01-01T23:59:59.000Z

214

A Calculus for Access Control in Distributed Systems  

E-Print Network [OSTI]

We study some of the concepts, protocols, and algorithms for access control in distributed systems, from a logical perspective. We account for how a principal may come to believe that another principal is making a request, ...

Abadi, Martin; Burrows, Michael; Lampson, Butler; Plotkin, Gordon

1993-01-01T23:59:59.000Z

215

Evaluation of the application uniformity of subsurface drip distribution systems  

E-Print Network [OSTI]

The goal of this research was to evaluate the application uniformity of subsurface drip distribution systems and the recovery of emitter flow rates. Emission volume in the field, and laboratory measured flow rates were determined for emitters from...

Weynand, Vance Leo

2004-09-30T23:59:59.000Z

216

Photovoltaic Systems Interconnected onto Secondary Network Distribution Systems Success Stories  

Broader source: Energy.gov [DOE]

This report examines six case studies of photovoltaic (PV) systems integrated into secondary network systems. The six PV systems were chosen for evaluation because they are interconnected to secondary network systems located in four major Solar America Cities.

217

A Simulation Study of Demand Responsive Transit System Design  

E-Print Network [OSTI]

A Simulation Study of Demand Responsive Transit System Design Luca Quadrifoglio, Maged M. Dessouky changed the landscape for demand responsive transit systems. First, the demand for this type of transit experiencing increased usage for demand responsive transit systems. The National Transit Summaries and Trends

Dessouky, Maged

218

Parallel and Distributed Systems Speaker: Dick Epema  

E-Print Network [OSTI]

systems Online Social Netw. #12;3 M.Sc. Thesis Projects: The Supervision · We help you excel, without is international · We often organize the top international conferences in our field #12;4 M.Sc. Thesis Projects concepts and show that they work · For examples of previous MSc projects see the theses on the PDS website

Kuzmanov, Georgi

219

Distributed Timing and Triggering Control System  

SciTech Connect (OSTI)

This document is a slide show type presentation regarding the need and realization of a new control system for work at the Nevada National Security Site. Commercial products that met the need are identified, both hardware and software. Particular emphasis is on the Integrated Signal Programmer.

Bowen, T., Huerta, J. A.

2012-08-01T23:59:59.000Z

220

A linear time-varying simulation of the respiratory system  

E-Print Network [OSTI]

A LINEAR TIME-VARYING SIMULATION OF THE RESPIRATORY SYSTEM A Thesis by OSCAR RENATO HERNANDEZ Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... August 1993 Major Subject: Health Physics A LINEAR TIME-VARYING SIMULATION OF THE RESPIRATORY SYSTEM A Thesis by OSCAR RENATO HERNANDEZ Approved as to style and content by: Wes y E. Bolch (Chair of Committee) Dan Hig tower (Member) ohn...

Hernandez, Oscar Renato

1993-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Systems simulation of oil additives to grain at terminal elevators  

E-Print Network [OSTI]

SYSTEMS SIMULATION OF OIL ADDITIVES TO GRAIN AT TERMINAL ELEVATORS A Thesis by Kerry James Goforth Submitted to the Graduate College of Texas A8M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May... 1985 Major Subject: Agricultural Engineering SYSTEMS SIMULATION OF OIL ADDITIVES TO GRAIN AT TERMINAL ELEVATORS A Thesis by KERRY J. GOFORTH Approved as to style and content by: Calvin B. Parne 1, Jr. (Chairman of Committee) tto R. Kunze...

Goforth, Kerry James

1985-01-01T23:59:59.000Z

222

Abstract--The reliability and quality of power distribution systems are usually affected by many different distribution faults.  

E-Print Network [OSTI]

1 Abstract--The reliability and quality of power distribution systems are usually affected by many and to provide a more effective fault restoration system. Index Terms-- power distribution systems, statistical analysis, tree-caused distribution faults. I. INTRODUCTION OWER systems play a very important role in our

Chow, Mo-Yuen

223

Dynamic simulation of a proposed ITER tritium processing system  

SciTech Connect (OSTI)

Dynamically simulating the fuel cycle in a fusion reactor is crucial to developing a better understanding of the safe and reliable operation of this complex system. In this work, we propose a tritium processing system for ITER`s plasma exhaust. The dynamic simulation of this proposed system is then performed with the TRUFFLES (TRitiUm Fusion Fuel cycLE dynamic Simulation) model. The fuel management, storage, and fueling operations are developed and coupled with previous cryopump and fuel cleanup unit subsystems to fully realize the complete torus exhaust flow cycle. Results show that tritium inventories will vary widely depending upon reactor operation, individual subsystem and unit operation designs. A diverse collection of batch-controlled subsystems with changes in their processing parameters are simulated in this work. In particular, the effects from the fuel management subsystem`s fuel reserve and tank switching times are quantified using sensitivity studies. 6 refs., 10 figs., 2 tabs.

Kuan, W.; Abdou, M.A. [Univ. of California, Los Angeles, CA (United States); Scott W.R. [Los Alamos National Lab., NM (United States)

1995-10-01T23:59:59.000Z

224

Photovoltaic Systems Interconnected onto Network Distribution Systems--Success Stories  

SciTech Connect (OSTI)

This report examines six case studies of photovoltaic systems integrated into secondary network systems in four major U.S. Solar America cities.

Coddington, M.; Kroposki, B.; Basso, T.; Lynn, K.; Sammon, D.; Vaziri, M.; Yohn, T.

2009-04-01T23:59:59.000Z

225

Nuclear Power - System Simulations and Operation  

E-Print Network [OSTI]

experi e n c e with water cooled and water modera t e d therma l reacto r s , based on fission of uranium- 2 3 5 . Neverthe l es s , the metho d o l o gi c al achie v e me n t s in simul a t i o n menti o n e d be low can defin it e l y be used... ul i c proce ss e s insid e the primary circuit of a pressurized water reactor (PWR) we can use the RELAP progra m (dev e l o p ed in the USA), the ATHLET code (devel o p ed in German y ) or the CATHARE cod e (deve l o p ed in Franc e ) . Several...

226

Simulating sensorimotor systems with cortical topology  

E-Print Network [OSTI]

Design. . . . Figure 9. The Brain Function . . Figure 10. Chaotic Behavior of a Simple Recurrent Equation of One Variable . . Page . . . . 13 . . . . 15 . . . . 1 6 24 . . . 25 Figure 11. Difference between Cartesian Image Space and Joint... intelli- gence and/or neural networks on the technological side and involve anatomical, physiological, and psychological systems on the biological side. We will characterize recent robotic sensorimotor system designs by comparing them from...

Saxon, James Bennett

1991-01-01T23:59:59.000Z

227

A computer simulation of a generalized police patrol system  

E-Print Network [OSTI]

rates, etc. for the system, 3) re-writing the dispatch subroutine (DISPAT) such that it processes calls for service, etc. in accordance with the dispatching discipline used in the system being simulated. The model may then be used to test proposed... patrol system modifications such as patrol sector boundary changes, changes in dispatching discipline, and the use of an Automatic Vehicle Monitoring (AVM) system. Provisions are made for generating three classes of calls for service according to a...

Dozier, Harold Wallace

1975-01-01T23:59:59.000Z

228

Towards a Discipline of Geospatial Distributed Event Based Systems  

E-Print Network [OSTI]

Towards a Discipline of Geospatial Distributed Event Based Systems Annie Liu Computer Science, Caltech 1200 E California Blvd Pasadena, CA 91125, USA mani@cms.caltech.edu ABSTRACT A geospatial system is one in which the state space in- cludes one, two or three-dimensional space and time. A geospatial

Heaton, Thomas H.

229

Development of Models to Simulate Tracer Behavior in Enhanced Geothermal Systems  

SciTech Connect (OSTI)

A recent report found that power and heat produced from engineered (or enhanced) geothermal systems (EGSs) could have a major impact on the United States while incurring minimal environmental impacts. EGS resources differ from high-grade hydrothermal resources in that they lack sufficient temperature distributions, permeability/porosity, fluid saturation, or recharge of reservoir fluids. Therefore, quantitative characterization of temperature distributions and the surface area available for heat transfer in EGS is necessary for commercial development of geothermal energy. The goal of this project is to provide integrated tracer and tracer interpretation tools to facilitate this characterization. Modeling capabilities are being developed as part of this project to support laboratory and field testing to characterize engineered geothermal systems in single- and multi-well tests using tracers. The objective of this report is to describe the simulation plan and the status of model development for simulating tracer tests for characterizing EGS.

Williams, Mark D.; Vermeul, Vincent R.; Reimus, P. W.; Newell, D.; Watson, Tom B.

2010-06-01T23:59:59.000Z

230

Using a scalable modeling and simulation framework to evaluate the benefits of intelligent transportation systems.  

SciTech Connect (OSTI)

A scalable, distributed modeling and simulation framework has been developed at Argonne National Laboratory to study Intelligent Transportation Systems. The framework can run on a single-processor workstation, or run distributed on a multiprocessor computer or network of workstations. The framework is modular and supports plug-in models, hardware, and live data sources. The initial set of models currently includes road network and traffic flow, probe and smart vehicles, traffic management centers, communications between vehicles and centers, in-vehicle navigation systems, roadway traffic advisories. The modeling and simulation capability has been used to examine proposed ITS concepts. Results are presented from modeling scenarios from the Advanced Driver and Vehicle Advisory Navigation Concept (ADVANCE) experimental program to demonstrate how the framework can be used to evaluate the benefits of ITS and to plan future ITS operational tests and deployment initiatives.

Ewing, T.; Tentner, A.

2000-03-21T23:59:59.000Z

231

Impact of Distributed Wind on Bulk Power System Operations in ISO-NE: Preprint  

SciTech Connect (OSTI)

The work presented in this paper aims to study the impact of a range of penetration levels of distributed wind on the operation of the electric power system at the transmission level. This paper presents a case study on the power system in Independent System Operator New England. It is analyzed using PLEXOS, a commercial power system simulation tool. The results show that increasing the integration of distributed wind reduces total variable electricity generation costs, coal- and gas-fired electricity generation, electricity imports, and CO2 emissions, and increases wind curtailment. The variability and uncertainty of wind power also increases the start-up and shutdown costs and ramping of most conventional power plants.

Brancucci Martinez-Anido, C.; Hodge, B. M.; Palchak, D.; Miettinen, J.

2014-09-01T23:59:59.000Z

232

GridLab Power Distribution System Simulation | Open Energy Information  

Open Energy Info (EERE)

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 on Office of InspectorConcentrating Solar Power BasicsGermany: Energy ResourcesNewsInformation Grid-ConnectedGridLab

233

Simulation of energy performance of underfloor air distribution (UFAD) systems  

E-Print Network [OSTI]

of demand response actions on baseline-buildingDemand Response and Energy Efficiency in Commercial BuildingsDemand Response Performance Results California Energy Commission Building

2009-01-01T23:59:59.000Z

234

Heart-Rate Pacing Simulation and Control via Multiagent Systems  

E-Print Network [OSTI]

Heart-Rate Pacing Simulation and Control via Multiagent Systems Alessandro Beda 1 and Nicola Gatti system of heart rate, but the results are so poor that the use of such models in commercial pacemakers evaluation. In litera- ture several techniques are adopted to combine models; for instance, in heart

Gatti, Nicola

235

Aircraft AC Generators: Hybrid System Modeling and Simulation  

E-Print Network [OSTI]

--Integrated Drive Generators (IDGs) are the main source of electrical power for a number of critical systems1 Aircraft AC Generators: Hybrid System Modeling and Simulation Ashraf Tantawy, Student Member is a difficult task. dq0 models have been developed for design and control of generators, but these models

Koutsoukos, Xenofon D.

236

Index for the Evaluation of Distributed Generation Impacts on Distribution System Luis F. Ochoa (1,2)  

E-Print Network [OSTI]

Index for the Evaluation of Distributed Generation Impacts on Distribution System Protection Luis F and distribution systems, in addition to the presence of customers with energy exportation capabilities a special attention since they may weaken the reliability of the system [2]-[3]. In this work, the impacts

Harrison, Gareth

237

Fault Current Issues for Market Driven Power Systems with Distributed Generation  

E-Print Network [OSTI]

1 Fault Current Issues for Market Driven Power Systems with Distributed Generation Natthaphob of installing distributed generation (DG) to electric power systems. The proliferation of new generators creates Terms--Distributed / dispersed generation, power distri- bution, power system protection, fault

238

Understanding and Improving CRM and GCM Simulations of Cloud Systems with ARM Observations  

SciTech Connect (OSTI)

The works supported by this ASR project lay the solid foundation for improving the parameterization of convection and clouds in the NCAR CCSM and the climate simulations. We have made a significant use of CRM simulations and ARM observations to produce thermodynamically and dynamically consistent multi-year cloud and radiative properties; improve the GCM simulations of convection, clouds and radiative heating rate and fluxes using the ARM observations and CRM simulations; and understand the seasonal and annual variation of cloud systems and their impacts on climate mean state and variability. We conducted multi-year simulations over the ARM SGP site using the CRM with multi-year ARM forcing data. The statistics of cloud and radiative properties from the long-term CRM simulations were compared and validated with the ARM measurements and value added products (VAP). We evaluated the multi-year climate simulations produced by the GCM with the modified convection scheme. We used multi-year ARM observations and CRM simulations to validate and further improve the trigger condition and revised closure assumption in NCAR GCM simulations that demonstrate the improvement of climate mean state and variability. We combined the improved convection scheme with the mosaic treatment of subgrid cloud distributions in the radiation scheme of the GCM. The mosaic treatment of cloud distributions has been implemented in the GCM with the original convection scheme and enables the use of more realistic cloud amounts as well as cloud water contents in producing net radiative fluxes closer to observations. A physics-based latent heat (LH) retrieval algorithm was developed by parameterizing the physical linkages of observed hydrometeor profiles of cloud and precipitation to the major processes related to the phase change of atmospheric water.

Wu, Xiaoqing

2014-02-25T23:59:59.000Z

239

Electron heat conduction under non-Maxwellian distribution in hohlraum simulation  

SciTech Connect (OSTI)

An electron transport model based on the non-Maxwellian distribution f{sub 0}{proportional_to}e{sup -{nu}{sup m}} (NM model), caused by the inverse bremsstrahlung heating, is used in 1-D plane target and 2-D hohlraum simulations. In the NM model, the electron heat flux depends not only on the gradient of electron temperature T{sub e} but also on the gradients of electron number density and the index m. From 1-D simulations, the spatial distribution of T{sub e} is dune-like and T{sub e} decreases obviously in the flux-heated region, which is very different from the flat profile obtained by using the flux limit model (FL model) but similar to the experimental observations [Gregori et al., Phys. Rev. Lett. 92, 205006 (2004)] and the nonlocal results [Rosen et al., High Energy Density Phys. 7, 180 (2011)]. The reason which causes the dune-like profile of T{sub e} is discussed in the paper. From 2-D hohlraum simulations, the NM results of the plasma status, the emission peak and profile inside hohlraum are very different from the FL model results. Finally, it is hard to use an average flux limiter in the FL model to obtain the same hohlraum plasma status and emission with those under the NM model.

Wen Yihuo; Ke Lan; Pei Jungu; Heng Yong; Qing Hongzeng [Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)

2012-01-15T23:59:59.000Z

240

Generation of Initial Kinetic Distributions for Simulation of Long-Pulse Charged Particle Beams with High Space-Charge intensity  

SciTech Connect (OSTI)

Self-consistent Vlasov-Poisson simulations of beams with high space-charge intensity often require specification of initial phase-space distributions that reflect properties of a beam that is well adapted to the transport channel--both in terms of low-order rms (envelope) properties as well as the higher-order phase-space structure. Here, we first review broad classes of kinetic distributions commonly in use as initial Vlasov distributions in simulations of unbunched or weakly bunched beams with intense space-charge fields including: the Kapchinskij-Vladimirskij (KV) equilibrium, continuous-focusing equilibria with specific detailed examples, and various non-equilibrium distributions, such as the semi-Gaussian distribution and distributions formed from specified functions of linear-field Courant-Snyder invariants. Important practical details necessary to specify these distributions in terms of usual accelerator inputs are presented in a unified format. Building on this presentation, a new class of approximate initial kinetic distributions are constructed using transformations that preserve linear-focusing single-particle Courant-Snyder invariants to map initial continuous-focusing equilibrium distributions to a form more appropriate for non-continuous focusing channels. Self-consistent particle-in-cell simulations are employed to show that the approximate initial distributions generated in this manner are better adapted to the focusing channels for beams with high space-charge intensity. This improved capability enables simulation applications that more precisely probe intrinsic stability properties and machine performance.

Lund, Steven M.; Kikuchi, Takashi; Davidson, Ronald C.

2007-04-03T23:59:59.000Z

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Generation of initial Vlasov distributions for simulation of charged particle beams with high space-charge intensity  

SciTech Connect (OSTI)

Self-consistent Vlasov simulations of beams with high space-charge intensity often require specification of initial phase-space distributions that reflect properties of a beam that is well adapted to the transport channel, both in terms of low-order rms (envelope) properties as well as the higher-order phase-space structure. Here, we first review broad classes of distributions commonly in use as initial Vlasov distributions in simulations of beams with intense space-charge fields including: the Kapchinskij-Vladimirskij (KV) equilibrium, continuous-focusing equilibria with specific detailed examples, and various non-equilibrium distributions, such as the semi-Gaussian distribution and distributions formed from specified functions of linear-field Courant-Snyder invariants. Important practical details necessary to specify these distributions in terms of usual accelerator inputs are presented in a unified format. Building on this presentation, a new class of approximate initial distributions are constructed using transformations that preserve linear-focusing single-particle Courant-Snyder invariants to map initial continuous-focusing equilibrium distributions to a form more appropriate for non-continuous focusing channels. Self-consistent particle-in-cell simulations are employed to show that the approximate initial distributions generated in this manner are better adapted to the focusing channels for beams with high space-charge intensity. This improved capability enables simulation applications that more precisely probe intrinsic stability properties and machine performance.

Lund, S M; Kikuchi, T; Davidson, R C

2007-04-12T23:59:59.000Z

242

E-Print Network 3.0 - air-distribution systems interactions Sample...  

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

Distribution Systems Bass Abushakra Iain S. Walker... , and the installation of supply boots and diffusers. Introduction The installation of air distribution systems... in the...

243

Low-Cost Hydrogen-from-Ethanol: A Distributed Production System...  

Broader source: Energy.gov (indexed) [DOE]

Low-Cost Hydrogen-from-Ethanol: A Distributed Production System (Presentation) Low-Cost Hydrogen-from-Ethanol: A Distributed Production System (Presentation) Presented at the 2007...

244

Comparison of two techniques for the simulation of PV systems  

SciTech Connect (OSTI)

For several years, MIT Lincoln Laboratory has conducted computer simulations of the performance of photovoltaic solar energy systems in order to size system components, to define designs of potential economic feasibility, to test various control schemes, and to monitor the performance of working systems in the field. When used as an aid-to-design, these hourly simulations step through a full year's worth of insolation and weather data at a specific geographical site. These data are available on computer tapes in the SOLMET format from the National Climatic Center. More recently, a simulation technique has been developed that does not require marching through time but instead works with probability-density functions of daily values of insolation and load as inputs while still providing estimates of the usual measures of system performance (e.g., auxiliary energy required, surplus energy thrown away, fraction of load displaced). Results obtained compare well with results previously obtained from an hourly simulation of a daytime radio station. This technique may be used to study the effect on system performance of varying degrees of correlation of load with insolation and to test the sensitivity of economic analyses to variations in utility escalation rate (discounted for inflation), PV module and balance-of-system costs.

Bucciarelli, L.L.; Grossman, B.L.

1980-01-01T23:59:59.000Z

245

Method for distributed agent-based non-expert simulation of manufacturing process behavior  

DOE Patents [OSTI]

A method for distributed agent based non-expert simulation of manufacturing process behavior on a single-processor computer comprises the steps of: object modeling a manufacturing technique having a plurality of processes; associating a distributed agent with each the process; and, programming each the agent to respond to discrete events corresponding to the manufacturing technique, wherein each discrete event triggers a programmed response. The method can further comprise the step of transmitting the discrete events to each agent in a message loop. In addition, the programming step comprises the step of conditioning each agent to respond to a discrete event selected from the group consisting of a clock tick message, a resources received message, and a request for output production message.

Ivezic, Nenad; Potok, Thomas E.

2004-11-30T23:59:59.000Z

246

INVESTIGATING THE RELIABILITY OF CORONAL EMISSION MEASURE DISTRIBUTION DIAGNOSTICS USING THREE-DIMENSIONAL RADIATIVE MAGNETOHYDRODYNAMIC SIMULATIONS  

SciTech Connect (OSTI)

Determining the temperature distribution of coronal plasmas can provide stringent constraints on coronal heating. Current observations with the Extreme ultraviolet Imaging Spectrograph (EIS) on board Hinode and the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory provide diagnostics of the emission measure distribution (EMD) of the coronal plasma. Here we test the reliability of temperature diagnostics using three-dimensional radiative MHD simulations. We produce synthetic observables from the models and apply the Monte Carlo Markov chain EMD diagnostic. By comparing the derived EMDs with the 'true' distributions from the model, we assess the limitations of the diagnostics as a function of the plasma parameters and the signal-to-noise ratio of the data. We find that EMDs derived from EIS synthetic data reproduce some general characteristics of the true distributions, but usually show differences from the true EMDs that are much larger than the estimated uncertainties suggest, especially when structures with significantly different density overlap along the line of sight. When using AIA synthetic data the derived EMDs reproduce the true EMDs much less accurately, especially for broad EMDs. The differences between the two instruments are due to the: (1) smaller number of constraints provided by AIA data and (2) broad temperature response function of the AIA channels which provide looser constraints to the temperature distribution. Our results suggest that EMDs derived from current observatories may often show significant discrepancies from the true EMDs, rendering their interpretation fraught with uncertainty. These inherent limitations to the method should be carefully considered when using these distributions to constrain coronal heating.

Testa, Paola [Smithsonian Astrophysical Observatory, 60 Garden Street, MS 58, Cambridge, MA 02138 (United States); De Pontieu, Bart; Martinez-Sykora, Juan [Lockheed Martin Solar and Astrophysics Laboratory, Org. A021S, Building 252, 3251 Hanover Street, Palo Alto, CA 94304 (United States); Hansteen, Viggo; Carlsson, Mats, E-mail: ptesta@cfa.harvard.edu [Institute of Theoretical Astrophysics, University of Oslo, P.O. Box 1029, Blindern, NO-0315 Oslo (Norway)

2012-10-10T23:59:59.000Z

247

Lateral density and arrival time distributions of Cherenkov photons in extensive air showers: a simulation study  

E-Print Network [OSTI]

We have investigated some features of the density and arrival time distributions of Cherenkov photons in extensive air showers using the CORSIKA simulation package. The main thrust of this study is to see the effect of hadronic interaction models on the production pattern of Cherenkov photons with respect to distance from the shower core. Such studies are very important in ground based $\\gamma$-ray astronomy for an effective rejection of huge cosmic ray background, where the atmospheric Cherenkov technique is being used extensively within the energy range of some hundred GeV to few TeV. We have found that for all primary particles, the density distribution patterns of Cherenkov photons follow the negative exponential function with different coefficients and slopes depending on the type of primary particle, its energy and the type of interaction model combinations. Whereas the arrival time distribution patterns of Cherenkov photons follow the function of the form $t (r) = t_{0}e^{\\Gamma/r^{\\lambda}}$, with different values of the function parameters. There is no significant effect of hadronic interaction model combinations onthe density and arrival time distributions for the $\\gamma$-ray primaries. However, for the hadronic showers, the effects of the model combinations are significant under different conditions. There are some contributions from shower to shower fluctuations to the density and arrival time deviations of Cherenkov photons apart from the contribution due to inherent differences in hadronic interaction models.

P. Hazarika; U. D. Goswami; V. R. Chitnis; B. S. Acharya; G. S. Das; B. B. Singh; R. Britto

2014-10-15T23:59:59.000Z

248

Thermal analysis of directly buried conduit heat-distribution systems  

SciTech Connect (OSTI)

The calculations of heat losses and temperature field for directly buried conduit heat distribution systems were performed using the finite element computer programs. The finite element analysis solved two-dimensional, steady-state heat transfer problems involving two insulated parallel pipes encased in the same conduit casing and in separate casings, and the surrounding earth. Descriptions of the theoretical basis, computational scheme, and the data input and outputs of the developed computer programs are presented. Numerical calculations were carried out for predicting the temperature distributions within the existing high temperature hot water distribution system and two insulated pipes covered in the same metallic conduit and the surrounding soil. The predicted results generally agree with the experimental data obtained at the test site.

Fang, J.B.

1990-08-01T23:59:59.000Z

249

Simulated effects of climate change on the Death Valley regional ground-water flow system, Nevada and California  

SciTech Connect (OSTI)

The US Geological Survey, in cooperation with the US Department of Energy, is evaluating the geologic and hydrologic characteristics of the Death Valley regional flow system as part of the Yucca Mountain Project. As part of the hydrologic investigation, regional, three-dimensional conceptual and numerical ground-water-flow models have been developed to assess the potential effects of past and future climates on the regional flow system. A simulation that is based on climatic conditions 21,000 years ago was evaluated by comparing the simulated results to observation of paleodischarge sites. Following acceptable simulation of a past climate, a possible future ground-water-flow system, with climatic conditions that represent a doubling of atmospheric carbon dioxide, was simulated. The steady-state simulations were based on the present-day, steady-state, regional ground-water-flow model. The finite-difference model consisted of 163 rows, 153 columns, and 3 layers and was simulated using MODFLOWP. Climate changes were implemented in the regional ground-water-flow model by changing the distribution of ground-water recharge. Global-scale, average-annual, simulated precipitation for both past- and future-climate conditions developed elsewhere were resampled to the model-grid resolution. A polynomial function that represents the Maxey-Eakin method for estimating recharge from precipitation was used to develop recharge distributions for simulation.

D`Agnese, F.A.; O`Brien, G.M.; Faunt, C.C.; San Juan, C.A.

1999-04-01T23:59:59.000Z

250

Fire Simulation, Evacuation Analysis and Proposal of Fire Protection Systems Inside an Underground Cavern  

E-Print Network [OSTI]

Fire Simulation, Evacuation Analysis and Proposal of Fire Protection Systems Inside an Underground Cavern

Stella, Carlo

251

Geostatistical Simulation of Hydrofacies Heterogeneity of the West Thessaly Aquifer Systems in Greece  

SciTech Connect (OSTI)

Integrating geological properties, such as relative positions and proportions of different hydrofacies, is of highest importance in order to render realistic geological patterns. Sequential indicator simulation (SIS) and Plurigaussian simulation (PS) are alternative methods for conceptual and deterministic modeling for the characterization of hydrofacies distribution. In this work, we studied the spatial differentiation of hydrofacies in the alluvial aquifer system of West Thessaly basin in Greece. For this, we applied both SIS and PS techniques to an extensive set of borehole data from that basin. Histograms of model versus experimental hydrofacies proportions and indicative cross sections were plotted in order to validate the results. The PS technique was shown to be more effective in reproducing the spatial characteristics of the different hydrofacies and their distribution across the study area. In addition, the permeability differentiations reflected in the PS model are in accordance to known heterogeneities of the aquifer capacity.

Modis, K., E-mail: kmodis@mail.ntua.gr; Sideri, D. [National Technical University of Athens, School of Mining and Metallurgical Engineering (Greece)] [National Technical University of Athens, School of Mining and Metallurgical Engineering (Greece)

2013-06-15T23:59:59.000Z

252

A Distributed Facilities Automation System For IBM Buildings  

E-Print Network [OSTI]

to the host would be via an IBM-supplied local communications network protocol. Remote appli cations would include process control, security, energy manage ment, facilities automation or any other automation application. The remote systems... of these areas which are affected are: - HVAC - Chemical Processes Control - Utilities Generation - Tank Farm Monitoring Resource Management - Solvent Supply and Recovery Systems - DI Water Distribution - Sewage and Waste Treatment Plant Control...

Houle, W. D. Sr.

253

Reliability of Heterogeneous Distributed Computing Systems in the Presence  

E-Print Network [OSTI]

Reliability of Heterogeneous Distributed Computing Systems in the Presence of Correlated Failures Jorge E. Pezoa, Member, IEEE and Majeed M. Hayat, Fellow, IEEE Abstract--While the reliability) fail independently, the impact of correlated failures of CEs on the reliability remains an open

Hayat, Majeed M.

254

Fuzzy logic based operated device identification in power distribution systems  

E-Print Network [OSTI]

of an operated device identification algorithm to be used as one of four modules in an automated modular scheme for fault section estimation on radial distribution systems. This algorithm will be executed in tandem with the other fault location modules that form...

Manivannan, Karthick Muthu

2002-01-01T23:59:59.000Z

255

Uni ed Support for Heterogeneous Security Policies in Distributed Systems  

E-Print Network [OSTI]

Uni ed Support for Heterogeneous Security Policies in Distributed Systems Naftaly H. Minsky in this paper a security mechanism that can support e ciently, and in a uni ed manner, a wide range of security policies are de ned formallyandexplicitly,and are enforced bya uni ed mechanism. Each policy under

Minsky, Naftaly

256

Distributed Proving in Access-Control Systems Scott Garriss  

E-Print Network [OSTI]

]). That is, credentials (i.e., certificates) are encoded as formulas in the logic (e.g., "KAlice signed (KBobDistributed Proving in Access-Control Systems Lujo Bauer Scott Garriss Michael K. Reiter§ Abstract- dentials in a formal logic (e.g., [16]). Of particular in- terest here are those in which the evidence

Reiter, Michael

257

Distributed Power Delivery for Energy Efficient and Low Power Systems  

E-Print Network [OSTI]

Distributed Power Delivery for Energy Efficient and Low Power Systems Selc¸uk K¨ose Department are needed to determine the location of these on-chip power supplies and decoupling capacitors. In this paper, the optimal location of the power supplies and decoupling capacitors is determined for different size

Friedman, Eby G.

258

Automated Energy Distribution and Reliability System (AEDR): Final Report  

SciTech Connect (OSTI)

This report describes Northern Indiana Public Service Co. project efforts to develop an automated energy distribution and reliability system. The purpose of this project was to implement a database-driven GIS solution that would manage all of the company's gas, electric, and landbase objects.

Buche, D. L.

2008-07-01T23:59:59.000Z

259

Efficient Symbolic Detection of Global Properties in Distributed Systems  

E-Print Network [OSTI]

to total orders containing the happened­before relation. A consistent global state (CGS) of a computation cEfficient Symbolic Detection of Global Properties in Distributed Systems Scott D. Stoller a global state satisfying property \\Phi. Previous general­purpose algorithms for this problem explicitly

Stoller, Scott

260

SELFMONITORING DISTRIBUTED MONITORING SYSTEM FOR NUCLEAR POWER PLANTS (PRELIMINARY VERSION)  

E-Print Network [OSTI]

SELFMONITORING DISTRIBUTED MONITORING SYSTEM FOR NUCLEAR POWER PLANTS (PRELIMINARY VERSION) Aldo and identification are extremely important activities for the safety of a nuclear power plant. In particular inside huge and complex production plants. 1 INTRODUCTION Safety in nuclear power plants requires

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Hazards Data Distribution System (HDDS) Explorer Help Documentation  

E-Print Network [OSTI]

Hazards Data Distribution System (HDDS) Explorer Help Documentation Version 1.1 March 2014 #12;Page: ii Document History Number Date and Sections Notes 1 August 2013 Original document 1.0 2 September information on Access to Events #12;Page: iii Table of contents Document History

262

Hybrid Control Network Intrusion Detection Systems for Automated Power Distribution Systems  

E-Print Network [OSTI]

) for protecting automated distribution systems (ADS) against certain types of cyber attacks in a new way, distribution au- tomation, network security, intrusion detection systems. I. INTRODUCTION A. Scope and Goals their development with that of an appropriate cyber security frame- work that would prevent attackers from gaining

Peisert, Sean

263

Simulated, Emulated, and Physical Investigative Analysis (SEPIA) of networked systems.  

SciTech Connect (OSTI)

This report describes recent progress made in developing and utilizing hybrid Simulated, Emulated, and Physical Investigative Analysis (SEPIA) environments. Many organizations require advanced tools to analyze their information system's security, reliability, and resilience against cyber attack. Today's security analysis utilize real systems such as computers, network routers and other network equipment, computer emulations (e.g., virtual machines) and simulation models separately to analyze interplay between threats and safeguards. In contrast, this work developed new methods to combine these three approaches to provide integrated hybrid SEPIA environments. Our SEPIA environments enable an analyst to rapidly configure hybrid environments to pass network traffic and perform, from the outside, like real networks. This provides higher fidelity representations of key network nodes while still leveraging the scalability and cost advantages of simulation tools. The result is to rapidly produce large yet relatively low-cost multi-fidelity SEPIA networks of computers and routers that let analysts quickly investigate threats and test protection approaches.

Burton, David P.; Van Leeuwen, Brian P.; McDonald, Michael James; Onunkwo, Uzoma A.; Tarman, Thomas David; Urias, Vincent E.

2009-09-01T23:59:59.000Z

264

Performance simulation of a MRPC-based PET Imaging System  

E-Print Network [OSTI]

The low cost and high resolution gas-based Multi-gap Resistive Plate Chamber (MRPC) opens a new possibility to find an efficient alternative detector for Time of Flight (TOF) based Positron Emission Tomography, where the sensitivity of the system depends largely on the time resolution of the detector. Suitable converters can be used to increase the efficiency of detection of photons from annihilation. In this work, we perform a detailed GEANT4 simulation to optimize the converter thickness thereby improving the efficiency of photon conversion. Also we have developed a Monte Carlo based simulation of MRPC response thereby obtaining the intrinsic time resolution of the detector, making it possible to simulate the final response of MRPC-based systems for PET imaging. The result of the cosmic ray test of a four-gap Bakelite-based MRPC operating in streamer mode is discussed.

A. Banerjee; S. Chattopadhyay

2011-06-29T23:59:59.000Z

265

Commercial thermal distribution systems, Final report for CIEE/CEC  

SciTech Connect (OSTI)

According to the California Energy Commission (CEC 1998a), California commercial buildings account for 35% of statewide electricity consumption, and 16% of statewide gas consumption. Space conditioning accounts for roughly 16,000 GWh of electricity and 800 million therms of natural gas annually, and the vast majority of this space conditioning energy passes through thermal distribution systems in these buildings. In addition, 8600 GWh per year is consumed by fans and pumps in commercial buildings, most of which is used to move the thermal energy through these systems. Research work at Lawrence Berkeley National Laboratory (LBNL) has been ongoing over the past five years to investigate the energy efficiency of these thermal distribution systems, and to explore possibilities for improving that energy efficiency. Based upon that work, annual savings estimates of 1 kWh/ft{sup 2} for light commercial buildings, and 1-2 kWh/ft{sup 2} in large commercial buildings have been developed for the particular aspects of thermal distribution system performance being addressed by this project. Those savings estimates, combined with a distribution of the building stock based upon an extensive stock characterization study (Modera et al. 1999a), and technical penetration estimates, translate into statewide saving potentials of 2000 GWh/year and 75 million thermal/year, as well as an electricity peak reduction potential of 0.7 GW. The overall goal of this research program is to provide new technology and application knowledge that will allow the design, construction, and energy services industries to reduce the energy waste associated with thermal distribution systems in California commercial buildings. The specific goals of the LBNL efforts over the past year were: (1) to advance the state of knowledge about system performance and energy losses in commercial-building thermal distribution systems; (2) to evaluate the potential of reducing thermal losses through duct sealing, duct insulation, and improved equipment sizing; and (3) to develop and evaluate innovative techniques applicable to large buildings for sealing ducts and encapsulating internal duct insulation. In the UCB fan project, the goals were: (1) to develop a protocol for testing, analyzing and diagnosing problems in large commercial building built-up air handling systems, and (2) to develop low-cost measurement techniques to improve short term monitoring practices. To meet our stated goals and objectives, this project: (1) continued to investigate and characterize the performance of thermal distribution systems in commercial buildings; (2) performed energy analyses and evaluation for duct-performance improvements for both small and large commercial buildings; (3) developed aerosol injection technologies for both duct sealing and liner encapsulation in commercial buildings; and (4) designed energy-related diagnostic protocols based on short term measurement and used a benchmarking database to compare subject systems with other measured systems for certain performance metrics. This year's efforts consisted of the following distinct tasks: performing characterization measurements for five light commercial building systems and five large-commercial-building systems; analyzing the potential for including duct performance in California's Energy Efficiency Standards for Residential and Non-Residential Buildings (Title 24), including performing energy and equipment sizing analyses of air distribution systems using DOE 2.1E for non-residential buildings; conducting laboratory experiments, field experiments, and modeling of new aerosol injection technologies concepts for sealing and coating, including field testing aerosol-based sealing in two large commercial buildings; improving low-cost fan monitoring techniques measurements, and disseminating fan tools by working with energy practitioners directly where possible and publishing the results of this research and the tools developed on a web-site. The final report consists of five sections listed below. Each section includes its related

Xu, Tengfang; Bechu, Olivier; Carrie, Remi; Dickerhoff, Darryl; Fisk, William; Franconi, Ellen; Kristiansen, Oyvind; Levinson, Ronnen; McWilliams, Jennifer; Wang, Duo; Modera, Mark; Webster, Tom; Ring, Erik; Zhang, Qiang; Huizenga, Charlie; Bauman, Fred; Arens, Ed

1999-12-01T23:59:59.000Z

266

Simulation of the TREAT-Upgrade Automatic Reactor Control System  

SciTech Connect (OSTI)

This paper describes the design of the Automatic Reactor Control System (ARCS) for the Transient Reactor Test Facility (TREAT) Upgrade. A simulation was used to facilitate the ARCS design and to completely test and verify its operation before installation at the TREAT facility.

Lipinski, W.C.; Kirsch, L.W.; Valente, A.D.

1984-01-01T23:59:59.000Z

267

Design, Analysis, and Simulation of Rocket Propulsion System  

E-Print Network [OSTI]

. The program currently provides a symbolic link in the form of a button on the output page which will open Unigraphics NX CAD program. The post-processing simulation of the rocket propulsion system is done in a computational fluid dynamics (CFD) program...

Kulhanek, Sarah Logan

2012-08-31T23:59:59.000Z

268

Performance Validation and Energy Analysis of HVAC Systems using Simulation  

E-Print Network [OSTI]

that energy savings of between 15% and 40% could be made in commercial buildings by closer monitoring and supervision of energy-usage and related data. An earlier study by Kao and Pierce (1983) showed that sensor1 Performance Validation and Energy Analysis of HVAC Systems using Simulation Tim Salsbury and Rick

Diamond, Richard

269

Modeling the Arterial System with Reference to an Anesthesia Simulator  

E-Print Network [OSTI]

Modeling the Arterial System with Reference to an Anesthesia Simulator Ph.D. Thesis 1 by Mette), and at the Department of Anesthesia, Herlev University Hospital. The study has been organized as an industrial Ph S.A. Pedersen, Roskilde University, and M.D. P.F. Jensen, Ph.D., Department of Anesthesia, Herlev

Olufsen, Mette Sofie

270

Performance Monitoring of Residential Hot Water Distribution Systems  

SciTech Connect (OSTI)

Current water distribution systems are designed such that users need to run the water for some time to achieve the desired temperature, wasting energy and water in the process. We developed a wireless sensor network for large-scale, long time-series monitoring of residential water end use. Our system consists of flow meters connected to wireless motes transmitting data to a central manager mote, which in turn posts data to our server via the internet. This project also demonstrates a reliable and flexible data collection system that could be configured for various other forms of end use metering in buildings. The purpose of this study was to determine water and energy use and waste in hot water distribution systems in California residences. We installed meters at every end use point and the water heater in 20 homes and collected 1s flow and temperature data over an 8 month period. For a typical shower and dishwasher events, approximately half the energy is wasted. This relatively low efficiency highlights the importance of further examining the energy and water waste in hot water distribution systems.

Liao, Anna; Lanzisera, Steven; Lutz, Jim; Fitting, Christian; Kloss, Margarita; Stiles, Christopher

2014-08-11T23:59:59.000Z

271

The distribution of neutral hydrogen around high-redshift galaxies and quasars in the EAGLE simulation  

E-Print Network [OSTI]

The observed high covering fractions of neutral hydrogen (HI) with column densities above $\\sim 10^{17} \\rm{cm}^{-2}$ around Lyman-Break Galaxies (LBGs) and bright quasars at redshifts z ~ 2-3 has been identified as a challenge for simulations of galaxy formation. We use the EAGLE cosmological, hydrodynamical simulation, which has been shown to reproduce a wide range of galaxy properties and for which the subgrid feedback was calibrated without considering gas properties, to study the distribution of HI around high-redshift galaxies. We predict the covering fractions of strong HI absorbers ($N_{\\rm{HI}} \\gtrsim 10^{17} \\rm{cm}^{-2}$) inside haloes to increase rapidly with redshift but to depend only weakly on halo mass. For massive ($M_{200} \\gtrsim 10^{12} {\\rm M_{\\odot}}$) halos the covering fraction profiles are nearly scale-invariant and we provide fitting functions that reproduce the simulation results. While efficient feedback is required to increase the HI covering fractions to the high observed values...

Rahmati, Alireza; Bower, Richard G; Crain, Robert A; Furlong, Michelle; Schaller, Matthieu; Theuns, Tom

2015-01-01T23:59:59.000Z

272

Econophysical Dynamics of Market-Based Electric Power Distribution Systems  

E-Print Network [OSTI]

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.

Nicolas Ho; David P. Chassin

2006-02-09T23:59:59.000Z

273

Scalable Distributed Directory Implementation on Orange File System  

E-Print Network [OSTI]

In Orange File System, large data files are striped across multiple servers to provide highly concurrent access, however, contents of large directories are only stored in a single server, which is becoming a bottleneck in handling a large number of requests accessing the same directory concurrently. In this paper, a scalable distributed directory for Orange File System is implemented and evaluated in a largescale system. The throughput performance is measured by a modified version of UCAR metarates benchmark. The result shows great scalability in concurrently creating and removing large numbers of files under one directory by multiple clients. On a 64-servers setup and 128 clients accessing the same directory concurrently, the scalable distributed directory can achieve more than 8,000 file creations per second and over 11,000 file removals per second on average. 1.

Shuangyang Yang; Walter B. Ligon Iii; Elaine C. Quarles

274

The Fermilab CMTF cryogenic distribution remote control system  

SciTech Connect (OSTI)

The Cryomodule Test Facility (CMTF) is able to provide the necessary test bed for measuring the performance of Superconducting Radio Frequency (SRF) cavities in a cryomodule (CM). The CMTF have seven 300 KW screw compressors, two liquid helium refrigerators, and two Cryomodule Test Stands (CMTS). CMTS1 is designed for 1.3 GHz cryomodule operating in a pulsed mode (PM) and CMTS2 is for cryomodule operating in Half-Wave (HW) and Continuous Wave (CW) mode. Based on the design requirement, each subsystem has to be far away from each other and be placed in distant locations. Therefore choosing Siemens Process Control System 7-400, DL205 PLC, Synoptic and Fermilab ACNET are the ideal choices for CMTF cryogenic distribution real-time remote control system. This paper presents a method which has been successfully used by many Fermilab distribution cryogenic real-time remote control systems.

Pei, L.; Theilacker, J.; Klebaner, A.; Martinez, A.; Bossert, R. [Fermi National Accelerator Laboratory Batavia, IL, 60510 (United States)

2014-01-29T23:59:59.000Z

275

Literature Review on Underfloor Air Distribution (UFAD) Systems  

E-Print Network [OSTI]

implemented with the improved type of outlet provided the indoor environment quality that meets the standard. McCarry, B.T. 1995. Underfloor air distribution systems: benefits and when to use the system in building design. ASHRAE Trans., 1995, Vol. 101, Pt... the structural slab and the underside of a raised floor to deliver conditioned air to supply outlets located at or near floor level within the occupied zone. The reported benefits of this system are: 1) improved thermal comfort, 2) reduced energy use, 3...

Im, P.; Cho, S.; Haberl, J. S.

2006-01-10T23:59:59.000Z

276

Transmission Pricing of Distributed Multilateral Energy Transactions to Ensure System Security and Guide Economic Dispatch  

E-Print Network [OSTI]

Transmission Pricing of Distributed Multilateral Energy Transactions to Ensure System Security and Guide Economic Dispatch...

Ilic, Marija; Hsieh, Eric; Remanan, Prasad

2004-06-16T23:59:59.000Z

277

Laboratories for the 21st Century Best Practices: Onsite Distributed Generation Systems For Laboratories  

Broader source: Energy.gov [DOE]

Guide describes general information on implementing onsite distributed generation systems in laboratory environments.

278

Interconnecting PV on New York City's Secondary Network Distribution System  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) has teamed with cities across the country through the Solar America Cities (SAC) partnership program to help reduce barriers and accelerate implementation of solar energy. The New York City SAC team is a partnership between the City University of New York (CUNY), the New York City Mayor s Office of Long-term Planning and Sustainability, and the New York City Economic Development Corporation (NYCEDC).The New York City SAC team is working with DOE s National Renewable Energy Laboratory (NREL) and Con Edison, the local utility, to develop a roadmap for photovoltaic (PV) installations in the five boroughs. The city set a goal to increase its installed PV capacity from1.1 MW in 2005 to 8.1 MW by 2015 (the maximum allowed in 2005). A key barrier to reaching this goal, however, is the complexity of the interconnection process with the local utility. Unique challenges are associated with connecting distributed PV systems to secondary network distribution systems (simplified to ???¢????????networks???¢??????? in this report). Although most areas of the country use simpler radial distribution systems to distribute electricity, larger metropolitan areas like New York City typically use networks to increase reliability in large load centers. Unlike the radial distribution system, where each customer receives power through a single line, a network uses a grid of interconnected lines to deliver power to each customer through several parallel circuits and sources. This redundancy improves reliability, but it also requires more complicated coordination and protection schemes that can be disrupted by energy exported from distributed PV systems. Currently, Con Edison studies each potential PV system in New York City to evaluate the system s impact on the network, but this is time consuming for utility engineers and may delay the customer s project or add cost for larger installations. City leaders would like to streamline this process to facilitate faster, simpler, and less expensive distributed PV system interconnections. To assess ways to improve the interconnection process, NREL conducted a four-part study with support from DOE. The NREL team then compiled the final reports from each study into this report. In Section 1???¢????????PV Deployment Analysis for New York City???¢????????we analyze the technical potential for rooftop PV systems in the city. This analysis evaluates potential PV power production in ten Con Edison networks of various locations and building densities (ranging from high density apartments to lower density single family homes). Next, we compare the potential power production to network loads to determine where and when PV generation is most likely to exceed network load and disrupt network protection schemes. The results of this analysis may assist Con Edison in evaluating future PV interconnection applications and in planning future network protection system upgrades. This analysis may also assist other utilities interconnecting PV systems to networks by defining a method for assessing the technical potential of PV in the network and its impact on network loads. Section 2???¢????????A Briefing for Policy Makers on Connecting PV to a Network Grid???¢????????presents an overview intended for nontechnical stakeholders. This section describes the issues associated with interconnecting PV systems to networks, along with possible solutions. Section 3???¢????????Technical Review of Concerns and Solutions to PV Interconnection in New Y

K. Anderson; M. Coddington; K. Burman; S. Hayter; B. Kroposki; and A. Watson

2009-11-30T23:59:59.000Z

279

Modelling, Simulation, Control and Optimisation of Nonsmooth Systems http://www.inrialpes.fr/bipop/  

E-Print Network [OSTI]

Neural networks Modelling and simulation bipeds Optimization of energy production Masonry structuresBIPOP Modelling, Simulation, Control and Optimisation of Nonsmooth Systems Web Site http

280

Revise CS 552: Distributed Systems to CS552: Distributed Real-Time Systems  

E-Print Network [OSTI]

Text Book: Real-Time Systems by Jane W.S. Liu, Prentice Hall, 2000 Research papers: Research papers Liu's book 1 #12;­ Resources and resource access control ­ Multiprocessor scheduling, resource access

Heller, Barbara

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

The design of a distributed image processing and dissemination system  

SciTech Connect (OSTI)

The design and implementation of a distributed image processing and dissemination system was undertaken and accomplished as part of a prototype communication and intelligence (CI) system, the contingency support system (CSS), which is intended to support contingency operations of the Tactical Air Command. The system consists of six (6) Sun 3/180C workstations with integrated ITEX image processors and three (3) 3/50 diskless workstations located at four (4) system nodes (INEL, base, and mobiles). All 3/180C workstations are capable of image system server functions where as the 3/50s are image system clients only. Distribution is accomplished via both local and wide area networks using standard Defense Data Network (DDN) protocols (i.e., TCP/IP, et al.) and Defense Satellite Communication Systems (DSCS) compatible SHF Transportable Satellite Earth Terminals (TSET). Image applications utilize Sun's Remote Procedure Call (RPC) to facilitate the image system client and server relationships. The system provides functions to acquire, display, annotate, process, transfer, and manage images via an icon, panel, and menu oriented Sunview{trademark} based user interface. Image spatial resolution is 512 {times} 480 with 8-bits/pixel black and white and 12/24 bits/pixel color depending on system configuration. Compression is used during various image display and transmission functions to reduce the dynamic range of image data of 12/6/3/2 bits/pixel depending on the application. Image acquisition is accomplished in real-time or near-real-time by special purpose Itex image hardware. As a result all image displays are highly interactive with attention given to subsecond response time. 3 refs., 7 figs.

Rafferty, P.; Hower, L.

1990-01-01T23:59:59.000Z

282

Ceph, a distributed storage system for scientific computing  

E-Print Network [OSTI]

Ceph is a distributed storage system designed to providing high performance and reliability at scales of up to thousands of storage nodes. The system is based on a distributed object storage layer call RADOS that provides durability, availability, efficient data distribution, and rich object semantics. This storage can be consumed directly via an object-based interface, or via file, block, or REST-based object services that are built on top of it. Clusters are composed of commodity components to provide a reliable storage service serving multiple use-cases. This seminar will cover the basic architecture of Ceph, with a focus on how each service can be consumed in a research and infrastructure environment. About the speaker Sage Weil, Founder and current CTO of Inktank Inc, is the creator of the Ceph project. He originally designed it as part of his PhD research in Storage Systems at the University of California, Santa Cruz. Since graduating, he has continued to refine the system with the goal of providi...

CERN. Geneva

2013-01-01T23:59:59.000Z

283

Parallel Breadth-First Search on Distributed Memory Systems  

SciTech Connect (OSTI)

Data-intensive, graph-based computations are pervasive in several scientific applications, and are known to to be quite challenging to implement on distributed memory systems. In this work, we explore the design space of parallel algorithms for Breadth-First Search (BFS), a key subroutine in several graph algorithms. We present two highly-tuned par- allel approaches for BFS on large parallel systems: a level-synchronous strategy that relies on a simple vertex-based partitioning of the graph, and a two-dimensional sparse matrix- partitioning-based approach that mitigates parallel commu- nication overhead. For both approaches, we also present hybrid versions with intra-node multithreading. Our novel hybrid two-dimensional algorithm reduces communication times by up to a factor of 3.5, relative to a common vertex based approach. Our experimental study identifies execu- tion regimes in which these approaches will be competitive, and we demonstrate extremely high performance on lead- ing distributed-memory parallel systems. For instance, for a 40,000-core parallel execution on Hopper, an AMD Magny- Cours based system, we achieve a BFS performance rate of 17.8 billion edge visits per second on an undirected graph of 4.3 billion vertices and 68.7 billion edges with skewed degree distribution.

Computational Research Division; Buluc, Aydin; Madduri, Kamesh

2011-04-15T23:59:59.000Z

284

Physical Modeling of Scaled Water Distribution System Networks.  

SciTech Connect (OSTI)

Threats to water distribution systems include release of contaminants and Denial of Service (DoS) attacks. A better understanding, and validated computational models, of the flow in water distribution systems would enable determination of sensor placement in real water distribution networks, allow source identification, and guide mitigation/minimization efforts. Validation data are needed to evaluate numerical models of network operations. Some data can be acquired in real-world tests, but these are limited by 1) unknown demand, 2) lack of repeatability, 3) too many sources of uncertainty (demand, friction factors, etc.), and 4) expense. In addition, real-world tests have limited numbers of network access points. A scale-model water distribution system was fabricated, and validation data were acquired over a range of flow (demand) conditions. Standard operating variables included system layout, demand at various nodes in the system, and pressure drop across various pipe sections. In addition, the location of contaminant (salt or dye) introduction was varied. Measurements of pressure, flowrate, and concentration at a large number of points, and overall visualization of dye transport through the flow network were completed. Scale-up issues that that were incorporated in the experiment design include Reynolds number, pressure drop across nodes, and pipe friction and roughness. The scale was chosen to be 20:1, so the 10 inch main was modeled with a 0.5 inch pipe in the physical model. Controlled validation tracer tests were run to provide validation to flow and transport models, especially of the degree of mixing at pipe junctions. Results of the pipe mixing experiments showed large deviations from predicted behavior and these have a large impact on standard network operations models.3

O'Hern, Timothy J.; Hammond, Glenn Edward; Orear, Leslie ,; van Bloemen Waanders, Bart G.; Paul Molina; Ross Johnson

2005-10-01T23:59:59.000Z

285

Lessons learned in modeling Underfloor Air Distribution system  

E-Print Network [OSTI]

Underfloor Air Distribution (UFAD) Design Guide. Atlanta:for design cooling loads in underfloor air distribution (

Lee, Kwang Ho; Schiavon, Stefano; Webster, Tom; Bauman, Fred; Feng, Jingjuan; Hoyt, Tyler

2011-01-01T23:59:59.000Z

286

Large-scale simulations of complex physical systems  

SciTech Connect (OSTI)

Scientific computing has become a tool as vital as experimentation and theory for dealing with scientific challenges of the twenty-first century. Large scale simulations and modelling serve as heuristic tools in a broad problem-solving process. High-performance computing facilities make possible the first step in this process - a view of new and previously inaccessible domains in science and the building up of intuition regarding the new phenomenology. The final goal of this process is to translate this newly found intuition into better algorithms and new analytical results.In this presentation we give an outline of the research themes pursued at the Scientific Computing Laboratory of the Institute of Physics in Belgrade regarding large-scale simulations of complex classical and quantum physical systems, and present recent results obtained in the large-scale simulations of granular materials and path integrals.

Belic, A. [Scientific Computing Laboratory, Institute of Physics, Pregrevica 118, 11080 Belgrade (Serbia and Montenegro)

2007-04-23T23:59:59.000Z

287

SOLID OXIDE FUEL CELL HYBRID SYSTEM FOR DISTRIBUTED POWER GENERATION  

SciTech Connect (OSTI)

This report summarizes the work performed by Honeywell during the October 2001 to December 2001 reporting period under Cooperative Agreement DE-FC26-01NT40779 for the U. S. Department of Energy, National Energy Technology Laboratory (DOE/NETL) entitled ''Solid Oxide Fuel Cell Hybrid System for Distributed Power Generation''. The main objective of this project is to develop and demonstrate the feasibility of a highly efficient hybrid system integrating a planar Solid Oxide Fuel Cell (SOFC) and a turbogenerator. The conceptual and demonstration system designs were proposed and analyzed, and these systems have been modeled in Aspen Plus. Work has also started on the assembly of dynamic component models and the development of the top-level controls requirements for the system. SOFC stacks have been fabricated and performance mapping initiated.

Kurt Montgomery; Nguyen Minh

2003-08-01T23:59:59.000Z

288

Event simulations in a transport model for intermediate energy heavy ion collisions: Applications to multiplicity distributions  

E-Print Network [OSTI]

We perform transport model calculations for central collisions of mass 120 on mass 120 at laboratory beam energy in the range 20 MeV/nucleon to 200 MeV/nucleon. A simplified yet accurate method allows calculation of fluctuations in systems much larger than what was considered feasible in a well-known and already existing model. The calculations produce clusters. The distribution of clusters is remarkably similar to that obtained in equilibrium statistical model.

Mallik, S; Chaudhuri, G

2015-01-01T23:59:59.000Z

289

Event simulations in a transport model for intermediate energy heavy ion collisions: Applications to multiplicity distributions  

E-Print Network [OSTI]

We perform transport model calculations for central collisions of mass 120 on mass 120 at laboratory beam energy in the range 20 MeV/nucleon to 200 MeV/nucleon. A simplified yet accurate method allows calculation of fluctuations in systems much larger than what was considered feasible in a well-known and already existing model. The calculations produce clusters. The distribution of clusters is remarkably similar to that obtained in equilibrium statistical model.

S. Mallik; S. Das Gupta; G. Chaudhuri

2015-03-19T23:59:59.000Z

290

Measured Air Distribution Effectiveness for Residential Mechanical Ventilation Systems  

SciTech Connect (OSTI)

The purpose of ventilation is dilute or remove indoor contaminants that an occupant is exposed to. In a multi-zone environment such as a house, there will be different dilution rates and different source strengths in every zone. Most US homes have central HVAC systems, which tend to mix the air thus the indoor conditions between zones. Different types of ventilation systems will provide different amounts of exposure depending on the effectiveness of their air distribution systems and the location of sources and occupants. This paper will report on field measurements using a unique multi-tracer measurement system that has the capacity to measure not only the flow of outdoor air to each zone, but zone-to-zone transport. The paper will derive seven different metrics for the evaluation of air distribution. Measured data from two homes with different levels of natural infiltration will be used to evaluate these metrics for three different ASHRAE Standard 62.2 compliant ventilation systems. Such information can be used to determine the effectiveness of different systems so that appropriate adjustments can be made in residential ventilation standards such as ASHRAE Standard 62.2.

Sherman, Max; Sherman, Max H.; Walker, Iain S.

2008-05-01T23:59:59.000Z

291

An Integrated System Simulation Approach for Wireless Networked Control Systems  

E-Print Network [OSTI]

Vanderbilt University Nashville, TN, USA Abstract--Cyber-Physical Systems (CPS), such as networked control wireless networks. Accurate modeling of these communication networks is essential in the design and verification of CPS. Controller design needs to take into ac- count the wireless channel characteristics (e

Koutsoukos, Xenofon D.

292

Simulation system provides unique training method for the oilfield  

SciTech Connect (OSTI)

Integrated services and turnkey operations are becoming the norm for the industry, and oilfield service companies are finding themselves linked with operators and contractors in long-term service contracts that would never have been considered in the 1980`s. In this paper, the authors discuss a unique simulator that can resolve the training needs that have surfaced as a result of the rapidly changing operational concepts in the oilfield environment. They will present the concepts of the equipment simulator and capabilities of the global simulator methodology, and they will use an actual case history to describe in detail how the equipment simulator was used offshore on a recent well-test job in the Gulf Coast area to introduce a new well-test tool and to train a new design engineer. With this information, the authors conclude that the use of the simulator will provide unparalleled training support for oilfield equipment and system applications and facilitate efficient development of integrated solutions for oilfield projects.

Beck, K. [Halliburton Energy Service, Dallas, TX (United States). Dallas Technology Center; Schwendemann, K. [Halliburton Energy Service, Carrollton, TX (United States). Dallas/Fort Worth Technology Center

1997-02-01T23:59:59.000Z

293

Compiling software for a hierarchical distributed processing system  

DOE Patents [OSTI]

Compiling software for a hierarchical distributed processing system including providing to one or more compiling nodes software to be compiled, wherein at least a portion of the software to be compiled is to be executed by one or more nodes; compiling, by the compiling node, the software; maintaining, by the compiling node, any compiled software to be executed on the compiling node; selecting, by the compiling node, one or more nodes in a next tier of the hierarchy of the distributed processing system in dependence upon whether any compiled software is for the selected node or the selected node's descendents; sending to the selected node only the compiled software to be executed by the selected node or selected node's descendent.

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

2013-12-31T23:59:59.000Z

294

The Development of A Human Systems Simulation Laboratory: Strategic Direction  

SciTech Connect (OSTI)

The Human System Simulation Laboratory (HSSL) at the Idaho National Laboratory is one of few facilities of its kind that allows human factors researchers to evaluate various aspects of human performance and human system interaction for proposed reactor designs and upgrades. A basic system architecture, physical configuration and simulation capability were established to enable human factors researchers to support multiple, simultaneous simulations and also different power plant technologies. Although still evolving in terms of its technical and functional architecture, the HSSL is already proving its worth in supporting current and future nuclear industry needs for light water reactor sustainability and small modular reactors. The evolution of the HSSL is focused on continual physical and functional refinement to make it a fully equipped, reconfigurable facility where advanced research, testing and validation studies can be conducted on a wider range of reactor technologies. This requires the implementation of additional plant models to produce empirical research data on human performance with emerging human-system interaction technologies. Additional beneficiaries of this information include system designers and HRA practitioners. To ensure that results of control room crew studies will be generalizable to the existing and evolving fleet of US reactors, future expansion of the HSSL may also include other SMR plant models, plant-specific simulators and a generic plant model aligned to the current generation of pressurized water reactors (PWRs) and future advanced reactor designs. Collaboration with industry partners is also proving to be a vital component of the facility as this helps to establish a formal basis for current and future human performance experiments to support nuclear industry objectives. A long-range Program Plan has been developed for the HSSL to ensure that the facility will support not only the Department of Energys Light Water Reactor Sustainability Program, but also to provide human factors guidance for all future developments of the nuclear industry.

Jacques Hugo; Katya le Blanc; David Gertman

2012-07-01T23:59:59.000Z

295

Feasibility Study: Ductless Hydronic Distribution Systems with Fan Coil Delivery  

SciTech Connect (OSTI)

The primary objectives of this study are to estimate potential energy savings relative to conventional ducted air distribution, and to identify equipment requirements, costs, and barriers with a focus on ductless hydronic delivery systems that utilize water-to-air terminal units in each zone. Results indicate that annual heating and cooling energy use can be reduced by up to 27% assuming replacement of the conventional 13 SEER heat pump and coil with a similarly rated air-to-water heat pump.

Springer, D.; Dakin, B.; Backman, C.

2012-07-01T23:59:59.000Z

296

Reliability Improvement Programs in Steam Distribution and Power Generation Systems  

E-Print Network [OSTI]

RELIABILITY IIIPROVEfWlT PROGRAMS IN STEAM DISTRIBUTION AND POVER GENERATION SYSTEItS Steve Petto Tech/Serv Corporation Blue Bell, PA Abstract This paper will present alternatives to costly corrective maintenance of the steam trap... In the reliability and efficiency of the system. Recent studies have shownt hat more than 40% of all In stalled steam traps and 20% of certain types of valves need some form of corrective action. The majority of all high backpressure problems In condensate return...

Petto, S.

297

Using Active Customer Participation in Managing Distribution Systems  

E-Print Network [OSTI]

;Impact AnalysisUtility Cost Benefit Analysis Consumer Participation DSM Objectives Load Shape Request] Department of Energy, Online: http://energy.gov/oe/technology-development/smart-grid #12;Current State 5 Gen at feeder/lateral level o IEEE 13 bus system o Distributed solar PV at 40% penetration 0.0 0.2 0.4 0.6 0.8 1

Van Veen, Barry D.

298

A New Model to Simulate Energy Performance of VRF Systems  

SciTech Connect (OSTI)

This paper presents a new model to simulate energy performance of variable refrigerant flow (VRF) systems in heat pump operation mode (either cooling or heating is provided but not simultaneously). The main improvement of the new model is the introduction of the evaporating and condensing temperature in the indoor and outdoor unit capacity modifier functions. The independent variables in the capacity modifier functions of the existing VRF model in EnergyPlus are mainly room wet-bulb temperature and outdoor dry-bulb temperature in cooling mode and room dry-bulb temperature and outdoor wet-bulb temperature in heating mode. The new approach allows compliance with different specifications of each indoor unit so that the modeling accuracy is improved. The new VRF model was implemented in a custom version of EnergyPlus 7.2. This paper first describes the algorithm for the new VRF model, which is then used to simulate the energy performance of a VRF system in a Prototype House in California that complies with the requirements of Title 24 ? the California Building Energy Efficiency Standards. The VRF system performance is then compared with three other types of HVAC systems: the Title 24-2005 Baseline system, the traditional High Efficiency system, and the EnergyStar Heat Pump system in three typical California climates: Sunnyvale, Pasadena and Fresno. Calculated energy savings from the VRF systems are significant. The HVAC site energy savings range from 51 to 85percent, while the TDV (Time Dependent Valuation) energy savings range from 31 to 66percent compared to the Title 24 Baseline Systems across the three climates. The largest energy savings are in Fresno climate followed by Sunnyvale and Pasadena. The paper discusses various characteristics of the VRF systems contributing to the energy savings. It should be noted that these savings are calculated using the Title 24 prototype House D under standard operating conditions. Actual performance of the VRF systems for real houses under real operating conditions will vary.

Hong, Tianzhen; Pang, Xiufeng; Schetrit, Oren; Wang, Liping; Kasahara, Shinichi; Yura, Yoshinori; Hinokuma, Ryohei

2014-03-30T23:59:59.000Z

299

Targeting Atmospheric Simulation Algorithms for Large Distributed Memory GPU Accelerated Computers  

SciTech Connect (OSTI)

Computing platforms are increasingly moving to accelerated architectures, and here we deal particularly with GPUs. In [15], a method was developed for atmospheric simulation to improve efficiency on large distributed memory machines by reducing communication demand and increasing the time step. Here, we improve upon this method to further target GPU accelerated platforms by reducing GPU memory accesses, removing a synchronization point, and better clustering computations. The modification ran over two times faster in some cases even though more computations were required, demonstrating the merit of improving memory handling on the GPU. Furthermore, we discover that the modification also has a near 100% hit rate in fast on-chip L1 cache and discuss the reasons for this. In concluding, we remark on further potential improvements to GPU efficiency.

Norman, Matthew R [ORNL

2013-01-01T23:59:59.000Z

300

A graphical electromagnetic simulation laboratory for power systems engineering programs  

SciTech Connect (OSTI)

The recent availability of Electromagnetic Transient Programs with graphical front ends now makes it possible to put together models for circuits and systems in a manner similar to the connection of components in a laboratory. In the past, the non-graphical EMT Programs required considerable expertise in their use and thus distracted the students into the details or simulation. The introduction of a graphical simulation based laboratory into Undergraduate and Graduate Engineering Programs is presented, based on the PSCAD/EMTDC program. The philosophy behind the design of suitable example cases is presented within the framework of an Undergraduate Power Electronics Course, an HVdc Transmission Course and a course on Power System Protection.

Gole, A.M. [Univ. of Manitoba, Winnipeg, Manitoba (Canada)] [Univ. of Manitoba, Winnipeg, Manitoba (Canada); Nayak, O.B. [Manitoba HVDC Research Centre, Winnipeg, Manitoba (Canada)] [Manitoba HVDC Research Centre, Winnipeg, Manitoba (Canada); Sidhu, T.S.; Sachdev, M.S. [Univ. of Saskatchewan, Saskatoon, Saskatchewan (Canada)] [Univ. of Saskatchewan, Saskatoon, Saskatchewan (Canada)

1996-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

CLARREO shortwave observing system simulation experiments of the twenty-first century: Simulator design and implementation  

SciTech Connect (OSTI)

Projected changes in the Earth system will likely be manifested in changes in reflected solar radiation. This paper introduces an operational Observational System Simulation Experiment (OSSE) to calculate the signals of future climate forcings and feedbacks in top-of-atmosphere reflectance spectra. The OSSE combines simulations from the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report for the NCAR Community Climate System Model (CCSM) with the MODTRAN radiative transfer code to calculate reflectance spectra for simulations of current and future climatic conditions over the 21st century. The OSSE produces narrowband reflectances and broadband fluxes, the latter of which have been extensively validated against archived CCSM results. The shortwave reflectance spectra contain atmospheric features including signals from water vapor, liquid and ice clouds, and aerosols. The spectra are also strongly influenced by the surface bidirectional reflectance properties of predicted snow and sea ice and the climatological seasonal cycles of vegetation. By comparing and contrasting simulated reflectance spectra based on emissions scenarios with increasing projected and fixed present-day greenhouse gas and aerosol concentrations, we find that prescribed forcings from increases in anthropogenic sulfate and carbonaceous aerosols are detectable and are spatially confined to lower latitudes. Also, changes in the intertropical convergence zone and poleward shifts in the subsidence zones and the storm tracks are all detectable along with large changes in snow cover and sea ice fraction. These findings suggest that the proposed NASA Climate Absolute Radiance and Refractivity Observatory (CLARREO) mission to measure shortwave reflectance spectra may help elucidate climate forcings, responses, and feedbacks.

Feldman, D.R.; Algieri, C.A.; Ong, J.R.; Collins, W.D.

2011-04-01T23:59:59.000Z

302

Solid Oxide Fuel Cell Hybrid System for Distributed Power Generation  

SciTech Connect (OSTI)

This report summarizes the work performed by Hybrid Power Generation Systems, LLC (HPGS) during the July 2003 to December 2003 reporting period under Cooperative Agreement DE-FC26-01NT40779 for the U. S. Department of Energy, National Energy Technology Laboratory (DOE/NETL) entitled ''Solid Oxide Fuel Cell Hybrid System for Distributed Power Generation''. The main objective of this project is to develop and demonstrate the feasibility of a highly efficient hybrid system integrating a planar Solid Oxide Fuel Cell (SOFC) and a micro-turbine. In addition, an activity included in this program focuses on the development of an integrated coal gasification fuel cell system concept based on planar SOFC technology. Also, another activity included in this program focuses on the development of SOFC scale up strategies.

Faress Rahman; Nguyen Minh

2004-01-04T23:59:59.000Z

303

System level design of power distribution network for mobile computing platforms.  

E-Print Network [OSTI]

??Providing a reliable power distribution network (PDN) is a critical design challenge for mobile system on chip platforms. A well-designed power distribution network should be (more)

Shayan Arani, Amirali

2011-01-01T23:59:59.000Z

304

SYSTEM PLANNING WITH THE HANFORD WASTE OPERATIONS SIMULATOR  

SciTech Connect (OSTI)

At the U. S. Department of Energy's Hanford Site in southeastern Washington State, 216 million liters (57 million gallons) of nuclear waste is currently stored in aging underground tanks, threatening the Columbia River. The River Protection Project (RPP), a fully integrated system of waste storage, retrieval, treatment, and disposal facilities, is in varying stages of design, construction, operation, and future planning. These facilities face many overlapping technical, regulatory, and financial hurdles to achieve site cleanup and closure. Program execution is ongoing, but completion is currently expected to take approximately 40 more years. Strategic planning for the treatment of Hanford tank waste is by nature a multi-faceted, complex and iterative process. To help manage the planning, a report referred to as the RPP System Plan is prepared to provide a basis for aligning the program scope with the cost and schedule, from upper-tier contracts to individual facility operating plans. The Hanford Tank Waste Operations Simulator (HTWOS), a dynamic flowsheet simulation and mass balance computer model, is used to simulate the current planned RPP mission, evaluate the impacts of changes to the mission, and assist in planning near-term facility operations. Development of additional modeling tools, including an operations research model and a cost model, will further improve long-term planning confidence. The most recent RPP System Plan, Revision 4, was published in September 2009.

CRAWFORD TW; CERTA PJ; WELLS MN

2010-01-14T23:59:59.000Z

305

Distributed embedded computing systems are special-purpose computer systems designed for particular applications and set up in a networked or distributed manner. A  

E-Print Network [OSTI]

ABSTRACT Distributed embedded computing systems are special-purpose computer systems designed). Therefore, this thesis presents a design methodology for distributing DSP applica- tions across wireless-power, application-specific sensor node platform for distributed WSN sys- tems is designed and demonstrated

Bhattacharyya, Shuvra S.

306

Instabilities simulations with wideband feedback systems: CMAD, HEADTAIL, WARP  

E-Print Network [OSTI]

Transverse mode coupling (TMCI) and electron cloud instabilities (ECI) pose fundamental limitations on the acceptable beam intensities in the SPS at CERN. This in turn limits the ultimate achievable luminosity in the LHC. Therefore, future luminosity upgrades foresee methods for evading TMCI as well as ECI. Proposed approaches within the LHC Injector Upgrade (LIU) project include new optics with reduced transition energy as well as vacuum chamber coating techniques. As a complementary option, high bandwidth feedback systems may provide instability mitigation by actively damping the intra-bunch motion of unstable modes. In an effort to evaluate the potentials and limitations of such feedback systems and to characterise some of the specifications, a numerical model of a realistic feedback system has been developed and integrated into available instabilities simulation codes. Together with the implementation of this new feedback system model, CMAD and HEADTAIL have been used to investigate the impact of differen...

Li, Kevin; Fox, J D; Pivi, M; Rivetta, C; Rumolo, G

2013-01-01T23:59:59.000Z

307

A scaleable architecture for the modeling and simulation of intelligent transportation systems.  

SciTech Connect (OSTI)

A distributed, scaleable architecture for the modeling and simulation of Intelligent Transportation Systems on a network of workstations or a parallel computer has been developed at Argonne National Laboratory. The resulting capability provides a modular framework supporting plug-in models, hardware, and live data sources; visually realistic graphics displays to support training and human factors studies; and a set of basic ITS models. The models and capabilities are described, along with atypical scenario involving dynamic rerouting of smart vehicles which send probe reports to and receive traffic advisories from a traffic management center capable of incident detection.

Ewing, T.; Tentner, A.

1999-03-17T23:59:59.000Z

308

Abstract--Electrical Distribution Systems (EDS) are facing ever-increasing complexity due to fast growing demand and large  

E-Print Network [OSTI]

to improve the reliability and quality of electrical distribution system. Index Terms- OPC technology, ICT1 Abstract-- Electrical Distribution Systems (EDS) are facing ever-increasing complexity due systems and Local Agent , Distribution Network, IEDs, Maltab OPC Toolbox, Distributed Generators

Paris-Sud XI, Universit de

309

A Virtual Engineering Framework for Simulating Advanced Power System  

SciTech Connect (OSTI)

In this report is described the work effort performed to provide NETL with VE-Suite based Virtual Engineering software and enhanced equipment models to support NETL's Advanced Process Engineering Co-simulation (APECS) framework for advanced power generation systems. Enhancements to the software framework facilitated an important link between APECS and the virtual engineering capabilities provided by VE-Suite (e.g., equipment and process visualization, information assimilation). Model enhancements focused on improving predictions for the performance of entrained flow coal gasifiers and important auxiliary equipment (e.g., Air Separation Units) used in coal gasification systems. In addition, a Reduced Order Model generation tool and software to provide a coupling between APECS/AspenPlus and the GE GateCycle simulation system were developed. CAPE-Open model interfaces were employed where needed. The improved simulation capability is demonstrated on selected test problems. As part of the project an Advisory Panel was formed to provide guidance on the issues on which to focus the work effort. The Advisory Panel included experts from industry and academics in gasification, CO2 capture issues, process simulation and representatives from technology developers and the electric utility industry. To optimize the benefit to NETL, REI coordinated its efforts with NETL and NETL funded projects at Iowa State University, Carnegie Mellon University and ANSYS/Fluent, Inc. The improved simulation capabilities incorporated into APECS will enable researchers and engineers to better understand the interactions of different equipment components, identify weaknesses and processes needing improvement and thereby allow more efficient, less expensive plants to be developed and brought on-line faster and in a more cost-effective manner. These enhancements to APECS represent an important step toward having a fully integrated environment for performing plant simulation and engineering. Furthermore, with little effort the modeling capabilities described in this report can be extended to support other DOE programs, such as ultra super critical boiler development, oxy-combustion boiler development or modifications to existing plants to include CO2 capture and sequestration.

Mike Bockelie; Dave Swensen; Martin Denison; Stanislav Borodai

2008-06-18T23:59:59.000Z

310

Simulation of the treat-upgrade automatic reactor control system  

SciTech Connect (OSTI)

This paper describes the design of the Automatic Reactor Control System (ARCS) for the Transient Reactor Test Facility (TREAT) Upgrade. A simulation was used to facilitate the ARCS design, and to completely test and verify its operation before installation at the TREAT facility. The ARCS is a microprocessor network based closed loop control system that provides a position demand control signal to the transient rod hydraulic drive system. There are four identical servo-hydraulic rod drives and each operates as a position control system. The ARCS updates its position demand control signal every 1 msec and its function is to control the transient rods so that the reactor follows a prescribed power-time profile (planned transient). The Main Control Algorithm (MCA) for the ARCS is an optimal reactivity demand algorithm. At each time step, the MCA generates a set of reference reactor functions, e.g., power, period, energy, and delayed neutron power. These functions are compared to plant measurements and estimated values at each time step and are operated on by appropriate algorithms to generate the reactivity demand function. The data necessary to calculate the reference functions is supplied from a Transient Prescription Control Data Set (TPCDS). The TPCDS specifies the planned transient as a fixed number of simply connected independent power profile segments. The developed simulation code models the TREAT reactor kinetics, the hydraulic rod drive system, the plant measurement system, and the ARCS control processor MCA. All of the models operate as continuous systems with the exception of the MCA which operates as a discrete time system at fixed multiples of 1 msec. The study indicates that the ARCS will meet or exceed all of its design specifications.

Lipinski, W.C.; Kirsch, L.W.; Valente, A.D.

1985-02-01T23:59:59.000Z

311

Completion report harmonic analysis of electrical distribution systems  

SciTech Connect (OSTI)

Harmonic currents have increased dramatically in electrical distribution systems in the last few years due to the growth in non-linear loads found in most electronic devices. Because electrical systems have been designed for linear voltage and current waveforms; (i.e. nearly sinusoidal), non-linear loads can cause serious problems such as overheating conductors or transformers, capacitor failures, inadvertent circuit breaker tripping, or malfunction of electronic equipment. The U.S. Army Center for Public Works has proposed a study to determine what devices are best for reducing or eliminating the effects of harmonics on power systems typical of those existing in their Command, Control, Communication and Intelligence (C3I) sites.

Tolbert, L.M.

1996-03-01T23:59:59.000Z

312

CONE-DHT: A distributed self-stabilizing algorithm for a heterogeneous storage system  

E-Print Network [OSTI]

CONE-DHT: A distributed self-stabilizing algorithm for a heterogeneous storage system Sebastian of managing a dynamic heterogeneous storage system in a distributed way so that the amount of data assigned for a dynamic heterogeneous storage system. Many solutions for distributed storage systems have already been

Paderborn, Universität

313

Toward a distributed storage system leveraging the DSL infrastructure of an ISP  

E-Print Network [OSTI]

Toward a distributed storage system leveraging the DSL infrastructure of an ISP Pierre Meye located close to the users. This paper presents the design choices about a distributed storage system-Distributed storage system; availability; consistency; I. INTRODUCTION The drawbacks of centralized storage systems

Paris-Sud XI, Université de

314

Simulation of aerosol distributions and radiative forcing for INDOEX: Regional climate impacts  

E-Print Network [OSTI]

7. Panel A: Variation in simulated TOA clear-sky net solarPanel B: Corresponding variation in simulated surface clear-sky net solar

Collins, William D.; Rasch, P. J.; Eaton, B. E.; Khattatov, B.; Fillimore, D. W.; Zender, C. S.

2002-01-01T23:59:59.000Z

315

Voices of Experience | Insights into Advanced Distribution Management Systems  

Broader source: Energy.gov [DOE]

The American Recovery and Reinvestment Act (ARRA) of 2009 spurred investments in smart grid technology and programs at utilities across the country. In 2011, the Office of Electricity Delivery and Energy Reliability (OE), in partnership with electric utilities that received ARRA funds, convened a series of Regional Smart Grid Peer-to-Peer Workshops. These were designed to bring together utilities to engage in dialogues about the most compelling smart grid topics in each region. In February 2014, OE formed the Advanced Distribution Management Systems (ADMS) Working Group by assembling a leadership team of representatives from the utility industry with the mission to collect the experiences, insights, and lessons learned from implementing these systems. This Voices of Experience | Insights into Advanced Distribution Management Systems report is the result of a one-day meeting held at CenterPoint Energy in Houston, Texas, in May 2014 that was followed by a series of conference calls about specific aspects of ADMS, interviews with individuals leading ADMS projects at their utilities, and a final small group meeting at San Diego Gas & Electric in California in October 2014.

316

Simulations of strongly phase-separated liquid-gas systems  

E-Print Network [OSTI]

Lattice Boltzmann simulations of liquid-gas systems are believed to be restricted to modest density ratios of less than 10. In this article we show that reducing the speed of sound and, just as importantly, the interfacial contributions to the pressure allows lattice Boltzmann simulations to achieve high density ratios of 1000 or more. We also present explicit expressions for the limits of the parameter region in which the method gives accurate results. There are two separate limiting phenomena. The first is the stability of the bulk liquid phase. This consideration is specific to lattice Boltzmann methods. The second is a general argument for the interface discretization that applies to any diffuse interface method.

A. J. Wagner; C. M. Pooley

2006-08-22T23:59:59.000Z

317

Comparison Between TRNSYS Software Simulation and PV F-Chart Program on Photovoltaic System  

E-Print Network [OSTI]

This report covers the comparisons of Photovoltaic System by TRNSYS simulation and PV F-Chart program to test TRNSYS simulation accuracy. The report starts with the Photovoltaic (PV) (PV) System introduction in Section one which is followed...

Haberl, J. S.; Baltazar, J. C.; Mao, C.

2012-01-01T23:59:59.000Z

318

Development of Design and Simulation Tool for Hybrid Geothermal Heat Pump System  

Broader source: Energy.gov [DOE]

This project will expand Expand eQUEST, a building energy analysis software with latest implementation of DOE-2, for simulations of HGSHP systems and improve its existing simulation capabilities for ordinary GSHP systems.

319

Photonic lattice simulation of dissipation-induced correlations in bosonic systems  

E-Print Network [OSTI]

We propose an optical simulation of dissipation-induced correlations in one-dimensional (1D) interacting bosonic systems, using a two-dimensional (2D) array of linear photonic waveguides and only classical light. We show that for the case of two bosons in a 1D lattice, one can simulate on-site two-body dissipative dynamics using a linear 2D waveguide array with lossy diagonal waveguides. The intensity distribution of the propagating light directly maps out the wave function, allowing one to observe the dissipation-induced correlations with simple measurements. Beyond the on-site model, we also show that a generalised model containing nearest-neighbour dissipative interaction can be engineered and probed in the proposed set-up.

Amit Rai; Changhyoup Lee; Changsuk Noh; Dimitris G. Angelakis

2015-02-25T23:59:59.000Z

320

Distributed Generation Systems Inc DISGEN | Open Energy Information  

Open Energy Info (EERE)

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 Home5b9fcbce19 No revision has beenFfe2fb55-352f-473b-a2dd-50ae8b27f0a6 No revision has Type TermOpenDistributed Generation Systems

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Spreader-Bar Radiation Detection System Enhancements: A Modeling and Simulation Study  

SciTech Connect (OSTI)

This report provides the modeling and simulation results of the investigation of enhanced spreader bar radiation detection systems.

Ely, James H.; Ashbaker, Eric D.; Batdorf, Michael T.; Baciak, James E.; Hensley, Walter K.; Jarman, Kenneth D.; Robinson, Sean M.; Sandness, Gerald A.; Schweppe, John E.

2012-11-13T23:59:59.000Z

322

Optimization of Comminution Circuit Throughput and Product Size Distribution by Simulation and Control  

SciTech Connect (OSTI)

The goal of this project was to improve energy efficiency of industrial crushing and grinding operations (comminution). Mathematical models of the comminution process were used to study methods for optimizing the product size distribution, so that the amount of excessively fine material produced could be minimized. The goal was to save energy by reducing the amount of material that was ground below the target size, while simultaneously reducing the quantity of materials wasted as ''slimes'' that were too fine to be useful. Extensive plant sampling and mathematical modeling of the grinding circuits was carried out to determine how to correct this problem. The approaches taken included (1) Modeling of the circuit to determine process bottlenecks that restrict flowrates in one area while forcing other parts of the circuit to overgrind the material; (2) Modeling of hydrocyclones to determine the mechanisms responsible for retaining fine, high-density particles in the circuit until they are overground, and improving existing models to accurately account for this behavior; and (3) Evaluation of the potential of advanced technologies to improve comminution efficiency and produce sharper product size distributions with less overgrinding. The mathematical models were used to simulate novel circuits for minimizing overgrinding and increasing throughput, and it is estimated that a single plant grinding 15 million tons of ore per year saves up to 82.5 million kWhr/year, or 8.6 x 10{sup 11} BTU/year. Implementation of this technology in the midwestern iron ore industry, which grinds an estimated 150 million tons of ore annually to produce over 50 million tons of iron ore concentrate, would save an estimated 1 x 10{sup 13} BTU/year.

S.K. Kawatra; T.C. Eisele; T. Weldum; D. Larsen; R. Mariani; J. Pletka

2005-07-01T23:59:59.000Z

323

Finite element simulations of hydrodynamic trapping in microfluidic particle-trap array systems  

E-Print Network [OSTI]

Finite element simulations of hydrodynamic trapping in microfluidic particle- trap array systems;Finite element simulations of hydrodynamic trapping in microfluidic particle-trap array systems Xiaoxiao) simulation is a powerful tool in the design and implementation of microfluidic systems, especially

Nehorai, Arye

324

Designing Better Scaffolding in Simulation-Based Learning Environments Teaching Science Systems: A Pilot Study Report  

E-Print Network [OSTI]

Designing Better Scaffolding in Simulation-Based Learning Environments Teaching Science Systems strong science background. They were asked to learn a chemical system in a simulation-based environment; simulation-based learning environments; scaffolding. Research Background Systems thinking skills have become

325

Economic Analysis of Trickle Distribution System Texas High Plains.  

E-Print Network [OSTI]

-subsurface distribution systems with 40-inch spacing of laterals and emitters (systems 4 through 9) ranged from $268.50 for subsurface 'Costs for hail insurance were included for expenses directly associated with irrigation. 7 TABLE 7. ESTIMATED IRRIGATION COSTS PER... 152.00 480.00 480.00 1,000.00 Sandseparator(s) 150.00 150.00 300.00 300.00 Other items' 620.58 1,193.10 1,295.12 2,829.17 Total investment 9,001.12 18,589.98 19,128.72 39,355.97 I nvestment per acre ' 562.57 580.94 597.77 614.94 'The automated...

Osborn, James E.; Young, Alan M.; Wilke, Otto C.; Wendt, Charles

1977-01-01T23:59:59.000Z

326

Aerogel-Based Insulation for Industrial Steam Distribution Systems  

SciTech Connect (OSTI)

Thermal losses in industrial steam distribution systems account for 977 trillion Btu/year in the US, more than 1% of total domestic energy consumption. Aspen Aerogels worked with Department of Energys Industrial Technologies Program to specify, develop, scale-up, demonstrate, and deliver Pyrogel XT, an aerogel-based pipe insulation, to market to reduce energy losses in industrial steam systems. The product developed has become Aspens best selling flexible aerogel blanket insulation and has led to over 60 new jobs. Additionally, this product has delivered more than ~0.7 TBTU of domestic energy savings to date, and could produce annual energy savings of 149 TBTU by 2030. Pyrogel XTs commercial success has been driven by its 2-4X better thermal performance, improved durability, greater resistance to corrosion under insulation (CUI), and faster installation times than incumbent insulation materials.

John Williams

2011-03-30T23:59:59.000Z

327

Visualization and continuous simulation of a space nuclear power system  

E-Print Network [OSTI]

2 Design of reactor system developed using graphical editor 17 3 Front end of Omega 4 Color Scale Editor . 19 21 5 Color Scale Editor with a more continuous scale 23 6 User Interface of Xcigs 25 7 Selection of particular component and cell... mathematical model is used to represent a physical or a hypothetical design of a space nuclear reactor. Thermal hydraulic analysis programs (such as CENTAR [5, 4], TRAC [2], and RELAP [6]) perform analysis on such models and produce simulation results...

Rawal, Rajiv

1992-01-01T23:59:59.000Z

328

Lattice simulations for few- and many-body systems  

E-Print Network [OSTI]

We review the recent literature on lattice simulations for few- and many-body systems. We focus on methods and results that combine the framework of effective field theory with computational lattice methods. Lattice effective field theory is discussed for cold atoms as well as low-energy nucleons with and without pions. A number of different lattice formulations and computational algorithms are considered, and an effort is made to show common themes in studies of cold atoms and low-energy nuclear physics as well as common themes in work by different collaborations.

Dean Lee

2008-12-13T23:59:59.000Z

329

NIHAO project II: Halo shape, phase-space density and velocity distribution of dark matter in galaxy formation simulations  

E-Print Network [OSTI]

We show the effect of galaxy formation on the dark matter (DM) distribution across a wide range of halo masses. We focus on how baryon physics changes the dark matter halo shape, the so called "pseudo phase-space density distribution" and the velocity distribution within the virial radius, Rvir and in the solar neighborhood. This study is based on the NIHAO galaxy formation simulations, a large suite of cosmological zoom-in simulations. The galaxies reproduce key properties of observed galaxies, and hence offer unique insight into how baryons change the dark matter morphology and kinematics. When compared to dark matter only simulations, the NIHAO haloes have similar shapes at Rvir, but are substantially rounder inside ~0.1 Rvir. In DM-only simulations the inner halo has a minor-to-major axis ratio of c/a~0.5. In hydro simulations c/a increases with halo mass and integrated star formation efficiency, reaching ~0.8 at the Milky Way mass, reconciling a long-standing conflict between observations and DM only sim...

Butsky, Iryna; Dutton, Aaron A; Wang, Liang; Stinson, Greg S; Penzo, Camilla; Kang, Xi; Keller, Ben W; Wadsley, James

2015-01-01T23:59:59.000Z

330

A high-performance workflow system for subsurface simulation  

SciTech Connect (OSTI)

Subsurface modeling applications typically neglect uncertainty in the conceptual models, past or future scenarios, and attribute most or all uncertainty to errors in model parameters. In this contribution, uncertainty in technetium-99 transport in a heterogeneous, deep vadose zone is explored with respect to the conceptual model using a next generation user environment called Akuna. Akuna provides a range of tools to manage environmental modeling projects, from managing simulation data to visualizing results from high-performance computational simulators. Core toolsets accessible through the user interface include model setup, grid generation, parameter estimation, and uncertainty quantification. The BC Cribs site at Hanford in southeastern Washington State is used to demonstrate Akuna capabilities. At the BC Cribs site, conceptualization of the system is highly uncertain because only sparse information is available for the geologic conceptual model, the physical and chemical properties of the sediments, and the history of waste disposal operations. Using the Akuna toolset to perform an analysis of conservative solute transport, significant prediction uncertainty in simulated concentrations is demonstrated by conceptual model variation. This demonstrates that conceptual model uncertainty is an important consideration in sparse data environments such as BC Cribs. It is also demonstrated that Akuna and the underlying toolset provides an integrated modeling environment that streamlines model setup, parameter optimization, and uncertainty analyses for high-performance computing applications.

Freedman, Vicky L.; Chen, Xingyuan; Finsterle, Stefan A.; Freshley, Mark D.; Gorton, Ian; Gosink, Luke J.; Keating, Elizabeth; Lansing, Carina; Moeglein, William AM; Murray, Christopher J.; Pau, George Shu Heng; Porter, Ellen A.; Purohit, Sumit; Rockhold, Mark L.; Schuchardt, Karen L.; Sivaramakrishnan, Chandrika; Vesselinov, Velimir V.; Waichler, Scott R.

2014-02-14T23:59:59.000Z

331

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System  

E-Print Network [OSTI]

Concentrating Solar Combined Heat and Power Systemfor Distributed Concentrating Solar Combined Heat and Powerof solar combined heat and power systems . . . . . . .

Norwood, Zachary Mills

2011-01-01T23:59:59.000Z

332

Particle in cell simulations of Buneman instability of a current-driven plasma with q-nonextensive electron velocity distribution  

SciTech Connect (OSTI)

The nonlinear evolution of low frequency Buneman instability in an unmagnetized current-driven plasma with q-nonextensive electron velocity distribution is investigated using particle in cell simulation. Simulation results show that the generation of electron phase space holes and the counter-streaming current induced in the plasma strongly depend on the q-parameter. It is found that by increasing the nonextensive parameter, the distribution of electron density becomes highly peaked. This density steepening or grating-like pattern occurs at the saturation time. In addition, a generalized dispersion relation is obtained using the kinetic theory. Analysis of the dispersion relation and the temporal evolution of the electric field energy density reveal that the growth rate of instability increases by increasing the q-parameter. Finally, the results of Maxwellian and q-nonextensive velocity distributions have been compared and discussed.

Niknam, A. R., E-mail: a-niknam@sbu.ac.ir; Roozbahani, H.; Komaizi, D. [Laser and Plasma Research Institute, Shahid Beheshti University, G.C., Tehran (Iran, Islamic Republic of); Hashemzadeh, M. [Faculty of Physics, Shahrood University, Shahrood (Iran, Islamic Republic of)

2014-09-15T23:59:59.000Z

333

Systems Management with Distributed Objects: Porting SNMP Agents to a CORBA Environment  

E-Print Network [OSTI]

Systems Management with Distributed Objects: Porting SNMP Agents to a CORBA Environment NM M TEAM the management of these systems in an efficient manner. Currently, this is not the case: while no such CORBA. Keywords: CORBA, Distributed Objects, Distributed Systems Management, Middleware 1 Introduction

334

Impact of Dynamic PHEVs Load on Renewable Sources based Distribution System  

E-Print Network [OSTI]

Impact of Dynamic PHEVs Load on Renewable Sources based Distribution System F. R. Islam, H. R. Pota.Roy@student.adfa.edu.au Abstract--In this paper, charging effect of dynamic Plug in Hybrid Electric Vehicle (PHEV) is presented in a renewable energy based electricity distribution system. For planning and designing a distribution system

Pota, Himanshu Roy

335

Action Models: A Reliability Modeling Formalism for Fault-Tolerant Distributed Computing Systems  

E-Print Network [OSTI]

Action Models: A Reliability Modeling Formalism for Fault-Tolerant Distributed Computing Systems. Introduction Model-based evaluation of the reliability of distributed systems has traditionally required expert- proach to analyze the reliability of fault-tolerant distributed systems. More in particular, we want

Newcastle upon Tyne, University of

336

A Prototype Data Archive for the PIER "Thermal Distribution Systems in Commercial Buildings" Project  

E-Print Network [OSTI]

A Prototype Data Archive for the PIER "Thermal Distribution Systems in Commercial Buildings archive for a selection of building energy data on thermal distribution systems in commercial buildings and Purpose The PIER "Thermal Distribution Systems in Commercial Buildings" (TDSCB) project (Diamond et al

337

Some characteristics of emerging distribution systems considering the smart grid initiative  

SciTech Connect (OSTI)

Modernization of the electric power system in the United States is driven by the Smart Grid Initiative. Many changes are planned in the coming years to the distribution side of the U.S. electricity delivery infrastructure to embody the idea of ''smart distribution systems.'' However, no functional or technical definition of a smart distribution system has yet been accepted by all. (author)

Brown, Hilary E.; Suryanarayanan, Siddharth; Heydt, Gerald T.

2010-06-15T23:59:59.000Z

338

Co-simulation of innovative integrated HVAC systems in buildings  

E-Print Network [OSTI]

Canada: International Building Perfor- mance SimulationExternal coupling between building energy simulation andexternal coupling of building energy and air ow modeling

Trcka, Marija

2010-01-01T23:59:59.000Z

339

IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 29, NO. 1, JANUARY 2014 203 Distribution Locational Marginal Pricing for Optimal  

E-Print Network [OSTI]

(DSO) determines distribution locational marginal prices (DLMPs) by solving the social welfare, distribution locational marginal prices (DLMPs), distribution locational marginal pricing (DLMP), distribution at node . System locational marginal price (LMP) at time period for the node feeding the distribution grid

Oren, Shmuel S.

340

User Simulation in Dialogue Systems using Inverse Reinforcement Learning Senthilkumar Chandramohan 1,3  

E-Print Network [OSTI]

User Simulation in Dialogue Systems using Inverse Reinforcement Learning Senthilkumar Chandramohan based on Inverse Reinforcement Learning (IRL). The task of building the user simulator is perceived is an expensive process. User simulators aim at simulating human users in order to generate synthetic data

Paris-Sud XI, Universit de

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Distribution System Voltage Performance Analysis for High-Penetration Photovoltaics  

SciTech Connect (OSTI)

This report examines the performance of commonly used distribution voltage regulation methods under reverse power flow.

Liu, E.; Bebic, J.

2008-02-01T23:59:59.000Z

342

Charge distribution analysis of catalysts under simulated reaction conditions. Final report, October 1, 1993--June 30, 1995  

SciTech Connect (OSTI)

A new technique has been developed to measure mobile charge carriers in dielectric materials, insulators and catalysts. The technique, Charge Distribution Analysis, is based on the measurement of the dielectric polarization in an electric field gradient, contact-free, at 0 Hertz under minimum perturbation conditions. The measured parameter is the force F{sup +-} experienced by the sample in a gradient of reversible polarity. CDA allows to determine the sign of the majority charge carriers and the density of surface charges which may be correlated to the chemical or catalytic activity. Throughout this work a microbalance has been used as a force-sensing device. CDA can be applied to any dielectric material, compact or porous, in inert or reactive and corrosive gas environments. To conduct CDA experiments under simulated reaction conditions that are relevant to coal liquefaction research, e.g. in reactive and in part chemically corrosive atmospheres, several modifications were introduced to the current design. In particular, the stainless steel sample chamber and furnace/electrode assembly were built, and the gas flow system was redesigned. The CDA instrument was equipped with new data acquisition capabilities. Tests were performed in inert gases and in reactive and corrosive atmosphere between ambient temperature and 500{degrees}C on iron oxide and partially sulfidized iron oxide catalysts as well as on pyrite (FeS{sub 2}) single crystals.

Freund, F.

1996-02-01T23:59:59.000Z

343

A DISTRIBUTED INTELLIGENT AUTOMATED DEMAND RESPONSE BUILDING MANAGEMENT SYSTEM  

SciTech Connect (OSTI)

The goal of the 2.5 year Distributed Intelligent Automated Demand Response (DIADR) project was to reduce peak electricity load of Sutardja Dai Hall at UC Berkeley by 30% while maintaining a healthy, comfortable, and productive environment for the occupants. We sought to bring together both central and distributed control to provide deep demand response1 at the appliance level of the building as well as typical lighting and HVAC applications. This project brought together Siemens Corporate Research and Siemens Building Technology (the building has a Siemens Apogee Building Automation System (BAS)), Lawrence Berkeley National Laboratory (leveraging their Open Automated Demand Response (openADR), Auto-?Demand Response, and building modeling expertise), and UC Berkeley (related demand response research including distributed wireless control, and grid-?to-?building gateway development). Sutardja Dai Hall houses the Center for Information Technology Research in the Interest of Society (CITRIS), which fosters collaboration among industry and faculty and students of four UC campuses (Berkeley, Davis, Merced, and Santa Cruz). The 141,000 square foot building, occupied in 2009, includes typical office spaces and a nanofabrication laboratory. Heating is provided by a district heating system (steam from campus as a byproduct of the campus cogeneration plant); cooling is provided by one of two chillers: a more typical electric centrifugal compressor chiller designed for the cool months (Nov-? March) and a steam absorption chiller for use in the warm months (April-?October). Lighting in the open office areas is provided by direct-?indirect luminaries with Building Management System-?based scheduling for open areas, and occupancy sensors for private office areas. For the purposes of this project, we focused on the office portion of the building. Annual energy consumption is approximately 8053 MWh; the office portion is estimated as 1924 MWh. The maximum peak load during the study period was 1175 kW. Several new tools facilitated this work, such as the Smart Energy Box, the distributed load controller or Energy Information Gateway, the web-?based DR controller (dubbed the Central Load-?Shed Coordinator or CLSC), and the Demand Response Capacity Assessment & Operation Assistance Tool (DRCAOT). In addition, an innovative data aggregator called sMAP (simple Measurement and Actuation Profile) allowed data from different sources collected in a compact form and facilitated detailed analysis of the building systems operation. A smart phone application (RAP or Rapid Audit Protocol) facilitated an inventory of the buildings plug loads. Carbon dioxide sensors located in conference rooms and classrooms allowed demand controlled ventilation. The extensive submetering and nimble access to this data provided great insight into the details of the building operation as well as quick diagnostics and analyses of tests. For example, students discovered a short-?cycling chiller, a stuck damper, and a leaking cooling coil in the first field tests. For our final field tests, we were able to see how each zone was affected by the DR strategies (e.g., the offices on the 7th floor grew very warm quickly) and fine-?tune the strategies accordingly.

Auslander, David; Culler, David; Wright, Paul; Lu, Yan; Piette, Mary

2013-12-30T23:59:59.000Z

344

Applications of Ontologies for Assembling Simulation Models of Industrial Systems  

E-Print Network [OSTI]

-automated semantic engine that assembles the simulation model. We represent a structure of a real industrial plant in a plant ontology and available simulation blocks in a simulation ontology. Signals of each simulation critical scenarios of nuclear power plants [9]. As some real experiments cannot be repeated under the same

345

FNCS: A Framework for Power System and Communication Networks Co-Simulation  

SciTech Connect (OSTI)

This paper describes the Fenix framework that uses a federated approach for integrating power grid and communication network simulators. Compared existing approaches, Fenix al- lows co-simulation of both transmission and distribution level power grid simulators with the communication network sim- ulator. To reduce the performance overhead of time synchro- nization, Fenix utilizes optimistic synchronization strategies that make speculative decisions about when the simulators are going to exchange messages. GridLAB-D (a distribution simulator), PowerFlow (a transmission simulator), and ns-3 (a telecommunication simulator) are integrated with the frame- work and are used to illustrate the enhanced performance pro- vided by speculative multi-threading on a smart grid applica- tion. Our speculative multi-threading approach achieved on average 20% improvement over the existing synchronization methods

Ciraci, Selim; Daily, Jeffrey A.; Fuller, Jason C.; Fisher, Andrew R.; Marinovici, Laurentiu D.; Agarwal, Khushbu

2014-04-13T23:59:59.000Z

346

Impact of Utility-Scale Distributed Wind on Transmission-Level System Operations  

SciTech Connect (OSTI)

This report presents a new renewable integration study that aims to assess the potential for adding distributed wind to the current power system with minimal or no upgrades to the distribution or transmission electricity systems. It investigates the impacts of integrating large amounts of utility-scale distributed wind power on bulk system operations by performing a case study on the power system of the Independent System Operator-New England (ISO-NE).

Brancucci Martinez-Anido, C.; Hodge, B. M.

2014-09-01T23:59:59.000Z

347

Fast-ions on Alcator C-Mod: Comparisons between Simulation and Experiment for Equilibrium and Evolving Distributions  

SciTech Connect (OSTI)

Analysis of fast-ion distributions >100 T{sub e} is important for both ITER and a fusion reactor, as both will have a significant population of fusion-born alpha particles. Furthermore, energetic ions may display transport properties that differ from the bulk plasma. It is imperative to benchmark current simulation codes with measurements of highly energetic fast-ions on current devices. Experimental measurements of ICRF heated H-minority plasmas on Alcator C-Mod are performed with an upgraded Compact Neutral Particle Analyzer (CNPA). The CNPA consists of vertically-viewing photodiode detectors with viewing chords from r/a = {approx}0.18 to 0.6 and energies from 150 keV to 1.5 MeV. The CNPA measurements are compared to the output of a synthetic diagnostic that has been added to the Fokker-Planck solver CQL3D. CQL3D is coupled with the full-wave solver AORSA to evolve a self-consistent fast-ion distribution. Good agreement is obtained between simulation and experiment for fast ion distributions that are in steady-state (df/dt = 0). However, there are discrepancies between the experimental and simulated results for the time-dependent evolution of the fast-ion distribution. A possible explanation of the discrepancy is due to violation of certain assumptions of quasi-linear theory.

Bader, A.; Bonoli, P. T.; Granetz, R. S.; Parker, R.; Wukitch, S. J. [MIT Plasma Science and Fusion Center, Cambridge, MA (United States); Harvey, R. W. [CompX Co. Del-Mar, CA (United States); Jaeger, E. F. [Oak Ridge National Lab, Oak Ridge, TN (United States)

2011-12-23T23:59:59.000Z

348

Partial Shade Evaluation of Distributed Power Electronics for Photovoltaic Systems: Preprint  

SciTech Connect (OSTI)

Site survey data for several residential installations are provided, showing the extent and frequency of shade throughout the year. This background information is used to design a representative shading test that is conducted on two side-by-side 8-kW photovoltaic (PV) installations. One system is equipped with a standard string inverter, while the other is equipped with microinverters on each solar panel. Partial shade is applied to both systems in a comprehensive range of shading conditions, simulating one of three shade extents. Under light shading conditions, the microinverter system produced the equivalent of 4% annual performance improvement, relative to the string inverter system. Under moderate shading conditions, the microinverter system outperformed the string inverter system by 8%, and under heavy shading the microinverter increased relative performance by 12%. In all three cases, the percentage of performance loss that is recovered by the use of distributed power electronics is 40%-50%. Additionally, it was found that certain shading conditions can lead to additional losses in string inverters due to peak-power tracking errors and voltage limitations.

Deline, C.; Meydbrav, J.; Donovan, M.

2012-06-01T23:59:59.000Z

349

Interpretation of time-of-flight distributions for neutral particles under pulsed laser evaporation using direct Monte Carlo simulation  

SciTech Connect (OSTI)

A theoretical study of the time-of-flight (TOF) distributions under pulsed laser evaporation in vacuum has been performed. A database of TOF distributions has been calculated by the direct simulation Monte Carlo (DSMC) method. It is shown that describing experimental TOF signals through the use of the calculated TOF database combined with a simple analysis of evaporation allows determining the irradiated surface temperature and the rate of evaporation. Analysis of experimental TOF distributions under laser ablation of niobium, copper, and graphite has been performed, with the evaluated surface temperature being well agreed with results of the thermal model calculations. General empirical dependences are proposed, which allow indentifying the regime of the laser induced thermal ablation from the TOF distributions for neutral particles without invoking the DSMC-calculated database.

Morozov, Alexey A., E-mail: morozov@itp.nsc.ru [Institute of Thermophysics SB RAS, 1 Lavrentyev Ave., 630090 Novosibirsk (Russian Federation)

2013-12-21T23:59:59.000Z

350

Abstract--Multimedia groupware systems provide rich support for distributed team work. Yet effective design of these systems is  

E-Print Network [OSTI]

evolve design ideas. The problem is that multimedia groupware is hard to prototype because distributed that inform the design of universally accepted toolkits for building distributed multimedia systems: we1 Abstract--Multimedia groupware systems provide rich support for distributed team work. Yet

Greenberg, Saul

351

System Integration of Distributed Power for Complete Building Systems: Phase 1 Report  

SciTech Connect (OSTI)

This report describes NiSource Energy Technologies Inc.'s base year of a planned 3-year effort to advance distributed power development, deployment, and integration. Its long-term goal is to design ways to extend distributed generation into the physical design and controls of buildings. NET worked to meet this goal through advances in the implementation and control of CHP systems in end-user environments and a further understanding of electric interconnection and siting issues. Important results from the first year were a survey of the state of the art of interconnection issues associated with distributed generation, a survey of the local zoning requirements for the NiSource service territory, and the acquisition of data about the operation, reliability, interconnection, and performance of CHP systems and components of two test sites.

Kramer, R.

2003-12-01T23:59:59.000Z

352

Studies of switching field and thermal energy barrier distributions in a FePt nanoparticle system  

E-Print Network [OSTI]

Studies of switching field and thermal energy barrier distributions in a FePt nanoparticle system X dependence of the thermal stability factor, the width of the thermal energy barrier distribution- ropy energy distribution and the interaction and the thermal energy barrier distribution determined

Laughlin, David E.

353

Simulated watershed responses to land cover changes using the Regional Hydro-Ecological Simulation System  

E-Print Network [OSTI]

Simulated watershed responses to land cover changes using the Regional Hydro-Ecological Simulation Old Main Hill, Logan, UT, 84322-8200, USA Abstract: In this work, we used the Regional Hydro

Tarboton, David

354

Dynamic Simulation and Optimization of Nuclear Hydrogen Production Systems  

SciTech Connect (OSTI)

This project is part of a research effort to design a hydrogen plant and its interface with a nuclear reactor. This project developed a dynamic modeling, simulation and optimization environment for nuclear hydrogen production systems. A hybrid discrete/continuous model captures both the continuous dynamics of the nuclear plant, the hydrogen plant, and their interface, along with discrete events such as major upsets. This hybrid model makes us of accurate thermodynamic sub-models for the description of phase and reaction equilibria in the thermochemical reactor. Use of the detailed thermodynamic models will allow researchers to examine the process in detail and have confidence in the accurary of the property package they use.

Paul I. Barton; Mujid S. Kaximi; Georgios Bollas; Patricio Ramirez Munoz

2009-07-31T23:59:59.000Z

355

Use of Building Automation System Trend Data for Inputs Generation in Bottom-Up Simulation Calibration  

E-Print Network [OSTI]

for analysis and use in simulation is very large. This paper explores automating the process of generating inputs from Building Automation System (BAS) trend data for use in building simulation software. A proof-of-concept prototype called the Automatic...

Zibin, N. F.; Zmeureanu, R. G.; Love, J. A.

2013-01-01T23:59:59.000Z

356

Performance comparison of U.K. low-energy cooling systems by energy simulation  

E-Print Network [OSTI]

Building energy simulation is an important tool for evaluating the energy consumption of a building and can provide guidance in the design of a building and its mechanical systems. EnergyPlus is a new energy simulation ...

Olsen, Erik L. (Erik Lee), 1979-

2002-01-01T23:59:59.000Z

357

A simulation model of a multi-server EJB system David Mc Guinness,  

E-Print Network [OSTI]

A simulation model of a multi-server EJB system David Mc Guinness, Performance Engineering sparse. This paper will describe how WorkbenchTM , an advanced simulation modelling tool, can be used

358

Linac cryogenic distribution system maintenance and upgrades at JLab  

SciTech Connect (OSTI)

The Central Helium Liquefier (CHL) distribution system to the CEBAF and FEL linacs at Jefferson Lab (JLab) experienced a planned warm up during the late summer and fall of 2012 for the first time after its commissioning in 1991. Various maintenance and modifications were performed to support high beam availability to the experimental users, meet 10 CFR 851 requirements for pressure systems, address operational issues, and prepare the cryogenic interfaces for the high-gradient cryomodules needed for the 12 GeV upgrade. Cryogenic maintenance and installation work had to be coordinated with other activities in the linacs and compete for manpower from other department installation activities. With less than a quarter of the gas storage capacity available to handle the boil-off from the more than 40 cryomodules, 35,000 Nm{sup 3} of helium was re-liquefied and shipped to a vendor via a liquid tanker trailer. Nearly 200 u-tubes had to be removed and stored while seals were replaced on related equipment such as vacuum pump outs, bayonet isolation and process valves.

Dixon, K.; Wright, M.; Ganni, V. [Thomas Jefferson National Accelerator Facility (JLab), Newport News, VA 23606 (United States)

2014-01-29T23:59:59.000Z

359

Linac cryogenic distribution system maintenance and upgrades at Jlab  

SciTech Connect (OSTI)

The Central Helium Liquefier (CHL) distribution system to the CEBAF and FEL linacs at Jefferson Lab (JLab) experienced a planned warm up during the late summer and fall of 2012 for the first time after its commissioning in 1991. Various maintenance and modifications were performed to support high beam availability to the experimental users, meet 10 CFR 851 requirements for pressure systems, address operational issues, and prepare the cryogenic interfaces for the high-gradient cryomodules needed for the 12 GeV upgrade. Cryogenic maintenance and installation work had to be coordinated with other activities in the linacs and compete for manpower from other department installation activities. With less than a quarter of the gas storage capacity available to handle the boil-off from the more than 40 cryomodules, 35,000 Nm{sup 3} of helium was re-liquefied and shipped to a vendor via a liquid tanker trailer. Nearly 200 u-tubes had to be removed and stored while seals were replaced on related equipment such as vacuum pump outs, bayonet isolation and process valves.

Dixon, Kelly D. [JLAB; Wright, Mathew C. [JLAB; Ganni, Venkatarao [JLAB

2014-01-01T23:59:59.000Z

360

A Generalized Replica Placement Strategy to Optimize Latency in a Wide Area Distributed Storage System  

E-Print Network [OSTI]

, CT USA john.chandy at uconn.edu ABSTRACT Wide area distributed storage systems leverage the scale is a peer-to-peer system that can pool disparate distributed resources into a cohesive storage system as inspiration, many global storage systems have used a peer to peer network framework as the underlying

Chandy, John A.

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Interaction systems design and the protocol-and middleware-centred paradigms in distributed application development  

E-Print Network [OSTI]

Interaction systems design and the protocol- and middleware-centred paradigms in distributed the benefits and importance of interaction systems design in the development of distributed applications. We in the development of distributed applications. Typical design methods based on the re-use of middleware platforms

van Sinderen, Marten

362

Performance and Reliability of Non-Markovian Heterogeneous Distributed Computing Systems  

E-Print Network [OSTI]

Performance and Reliability of Non-Markovian Heterogeneous Distributed Computing Systems Jorge E-of-service (QoS), and service reliability associated with heterogeneous parallel and distributed computing and system settings for which the Markovian setting, resulting from employing an exponential- distribution

Hayat, Majeed M.

363

Distributed Solar PV for Electricity System Resiliency: Policy and Regulatory Considerations (Brochure)  

SciTech Connect (OSTI)

Distributed Solar PV systems have the potential of increasing the grid's resiliency to unforeseen events, such as extreme weather events and attacks. This paper presents the role that distributed PV can play in electric grid resiliency, introduces basic system design requirements and options, and discusses the regulatory and policy options for supporting the use of distributed PV for the purpose of increased electricity resiliency.

Not Available

2014-11-01T23:59:59.000Z

364

Carbon and Water Resource Management for Water Distribution Systems  

E-Print Network [OSTI]

wastewater transmission and sewage treatment. Distribution pumping and sewage treatment were found to contribute the most to climate change

Hendrickson, Thomas Peter

2013-01-01T23:59:59.000Z

365

Low-Cost Hydrogen Distributed Production System Development  

SciTech Connect (OSTI)

H{sub 2}Gen, with the support of the Department of Energy, successfully designed, built and field-tested two steam methane reformers with 578 kg/day capacity, which has now become a standard commercial product serving customers in the specialty metals and PV manufacturing businesses. We demonstrated that this reformer/PSA system, when combined with compression, storage and dispensing (CSD) equipment could produce hydrogen that is already cost-competitive with gasoline per mile driven in a conventional (non-hybrid) vehicle. We further showed that mass producing this 578 kg/day system in quantities of just 100 units would reduce hydrogen cost per mile approximately 13% below the cost of untaxed gasoline per mile used in a hybrid electric vehicle. If mass produced in quantities of 500 units, hydrogen cost per mile in a FCEV would be 20% below the cost of untaxed gasoline in an HEV in the 2015-2020 time period using EIA fuel cost projections for natural gas and untaxed gasoline, and 45% below the cost of untaxed gasoline in a conventional car. This 20% to 45% reduction in fuel cost per mile would accrue even though hydrogen from this 578 kg/day system would cost approximately $4.14/kg, well above the DOE hydrogen cost targets of $2.50/kg by 2010 and $2.00/kg by 2015. We also estimated the cost of a larger, 1,500 kg/day SMR/PSA fueling system based on engineering cost scaling factors derived from the two H{sub 2}Gen products, a commercial 115 kg/day system and the 578 kg/day system developed under this DOE contract. This proposed system could support 200 to 250 cars per day, similar to a medium gasoline station. We estimate that the cost per mile from this larger 1,500 kg/day hydrogen fueling system would be 26% to 40% below the cost per mile of untaxed gasoline in an HEV and ICV respectively, even without any mass production cost reductions. In quantities of 500 units, we are projecting per mile cost reductions between 45% (vs. HEVs) and 62% (vs ICVs), with hydrogen costing approximately $2.87/kg, still above the DOE's 2010 $2.50/kg target. We also began laboratory testing of reforming ethanol, which we showed is currently the least expensive approach to making renewable hydrogen. Extended testing of neat ethanol in micro-reactors was successful, and we also were able to reform E-85 acquired from a local fueling station for 2,700 hours, although some modifications were required to handle the 15% gasoline present in E-85. We began initial tests of a catalyst-coated wall reformer tube that showed some promise in reducing the propensity to coke with E-85. These coated-wall tests ran for 350 hours. Additional resources would be required to commercialize an ethanol reformer operating on E-85, but there is no market for such a product at this time, so this ethanol reformer project was moth-balled pending future government or industry support. The two main objectives of this project were: (1) to design, build and test a steam methane reformer and pressure swing adsorption system that, if scaled up and mass produced, could potentially meet the DOE 2015 cost and efficiency targets for on-site distributed hydrogen generation, and (2) to demonstrate the efficacy of a low-cost renewable hydrogen generation system based on reforming ethanol to hydrogen at the fueling station.

C.E. (Sandy) Thomas, Ph.D., President; Principal Investigator, and

2011-03-10T23:59:59.000Z

366

System Impacts from Interconnection of Distributed Resources: Current Status and Identification of Needs for Further Development  

SciTech Connect (OSTI)

This report documents and evaluates system impacts from the interconnection of distributed resources to transmission and distribution systems, including a focus on renewable distributed resource technologies. The report also identifies system impact-resolution approaches and actions, including extensions of existing approaches. Lastly, the report documents the current challenges and examines what is needed to gain a clearer understanding of what to pursue to better avoid or address system impact issues.

Basso, T. S.

2009-01-01T23:59:59.000Z

367

Loop simulation capability for sodium-cooled systems  

E-Print Network [OSTI]

A one-dimensional loop simulation capability has been implemented in the thermal-hydraulic analysis code, THERMIT-4E. This code had been used to simulate and investigate flow in test sections of experimental sodium loops ...

Adekugbe, Oluwole A.

1984-01-01T23:59:59.000Z

368

IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS 1 Distributed Algorithms for Constructing  

E-Print Network [OSTI]

distributed algorithms called Nearest Neighbor Tree (NNT) algorithms for energy-efficient construction, Energy-Efficient Algorithms, Minimum Spanning Tree, Wireless Networks, Sensor Network. I. OVERVIEW A

Khan, Maleq

369

Results from modeling and simulation of chemical downstream etch systems  

SciTech Connect (OSTI)

This report summarizes modeling work performed at Sandia in support of Chemical Downstream Etch (CDE) benchmark and tool development programs under a Cooperative Research and Development Agreement (CRADA) with SEMATECH. The Chemical Downstream Etch (CDE) Modeling Project supports SEMATECH Joint Development Projects (JDPs) with Matrix Integrated Systems, Applied Materials, and Astex Corporation in the development of new CDE reactors for wafer cleaning and stripping processes. These dry-etch reactors replace wet-etch steps in microelectronics fabrication, enabling compatibility with other process steps and reducing the use of hazardous chemicals. Models were developed at Sandia to simulate the gas flow, chemistry and transport in CDE reactors. These models address the essential components of the CDE system: a microwave source, a transport tube, a showerhead/gas inlet, and a downstream etch chamber. The models have been used in tandem to determine the evolution of reactive species throughout the system, and to make recommendations for process and tool optimization. A significant part of this task has been in the assembly of a reasonable set of chemical rate constants and species data necessary for successful use of the models. Often the kinetic parameters were uncertain or unknown. For this reason, a significant effort was placed on model validation to obtain industry confidence in the model predictions. Data for model validation were obtained from the Sandia Molecular Beam Mass Spectrometry (MBMS) experiments, from the literature, from the CDE Benchmark Project (also part of the Sandia/SEMATECH CRADA), and from the JDP partners. The validated models were used to evaluate process behavior as a function of microwave-source operating parameters, transport-tube geometry, system pressure, and downstream chamber geometry. In addition, quantitative correlations were developed between CDE tool performance and operation set points.

Meeks, E.; Vosen, S.R.; Shon, J.W.; Larson, R.S.; Fox, C.A.; Buchenauer

1996-05-01T23:59:59.000Z

370

Co-simulation of innovative integrated HVAC systems in buildings  

E-Print Network [OSTI]

Wetter, M. , 2009. Modelica-based Modeling and Simulation totools like TRNSYS or Modelica [http://www.modelica.org] have

Trcka, Marija

2010-01-01T23:59:59.000Z

371

Investigating Operating System Noise in Extreme-Scale High-Performance Computing Systems using Simulation  

SciTech Connect (OSTI)

Hardware/software co-design for future-generation high-performance computing (HPC) systems aims at closing the gap between the peak capabilities of the hardware and the performance realized by applications (application-architecture performance gap). Performance profiling of architectures and applications is a crucial part of this iterative process. The work in this paper focuses on operating system (OS) noise as an additional factor to be considered for co-design. It represents the first step in including OS noise in HPC hardware/software co-design by adding a noise injection feature to an existing simulation-based co-design toolkit. It reuses an existing abstraction for OS noise with frequency (periodic recurrence) and period (duration of each occurrence) to enhance the processor model of the Extreme-scale Simulator (xSim) with synchronized and random OS noise simulation. The results demonstrate this capability by evaluating the impact of OS noise on MPI_Bcast() and MPI_Reduce() in a simulated future-generation HPC system with 2,097,152 compute nodes.

Engelmann, Christian [ORNL

2013-01-01T23:59:59.000Z

372

Three surveillance systems for describing the spatial distribution of Johne's disease seropositivity in Texas cattle  

E-Print Network [OSTI]

distribution of Johnes disease seropositvity, based on the three surveillance systems, confirmed our hypothesis that estimation of disease distribution is dependant upon the source of surveillance samples....

Pearce, Brielle H.

2009-05-15T23:59:59.000Z

373

Free energies, vacancy concentrations and density distribution anisotropies in hard--sphere crystals: A combined density functional and simulation study  

E-Print Network [OSTI]

We perform a comparative study of the free energies and the density distributions in hard sphere crystals using Monte Carlo simulations and density functional theory (employing Fundamental Measure functionals). Using a recently introduced technique (Schilling and Schmid, J. Chem. Phys 131, 231102 (2009)) we obtain crystal free energies to a high precision. The free energies from Fundamental Measure theory are in good agreement with the simulation results and demonstrate the applicability of these functionals to the treatment of other problems involving crystallization. The agreement between FMT and simulations on the level of the free energies is also reflected in the density distributions around single lattice sites. Overall, the peak widths and anisotropy signs for different lattice directions agree, however, it is found that Fundamental Measure theory gives slightly narrower peaks with more anisotropy than seen in the simulations. Among the three types of Fundamental Measure functionals studied, only the White Bear II functional (Hansen-Goos and Roth, J. Phys.: Condens. Matter 18, 8413 (2006)) exhibits sensible results for the equilibrium vacancy concentration and a physical behavior of the chemical potential in crystals constrained by a fixed vacancy concentration.

M. Oettel; S. Goerig; A. Haertel; H. Loewen; M. Radu; T. Schilling

2010-09-03T23:59:59.000Z

374

Improving Simulations of Fine Dust Surface Concentrations over the Western United States by Optimizing the Particle Size Distribution  

SciTech Connect (OSTI)

To improve estimates of remote contributions of dust to fine particulate matter (PM2.5) in the western United States, new dust particle size distributions (PSDs) based upon scale-invariant fragmentation theory (Kok_PSD) with constraints from in situ measurements (IMP_PSD) are implemented in a chemical transport model (GEOS-Chem). Compared to initial simulations, this leads to reductions in the mass of emitted dust particles with radii <1.8 mm by 40%-60%. Consequently, the root-mean-square error in simulated fine dust concentrations compared to springtime surface observations in the western United States is reduced by 67%-81%. The ratio of simulated fine to coarse PM mass is also improved, which is not achievable by reductions in total dust emissions. The IMP_PSD best represents the PSD of dust transported from remote sources and reduces modeled PM2.5 concentrations up to 5 mg/m3 over the western United States, which is important when considering sources contributing to nonattainment of air quality standards. Citation: Zhang, L., J. F. Kok, D. K. Henze, Q. Li, and C. Zhao (2013), Improving simulations of fine dust surface concentrations over the western United States by optimizing the particle size distribution, Geophys. Res. Lett., 40, 3270-3275, doi:10.1002/grl.50591.

Zhang, Li; Kok, Jasper F.; Henze, Daven; Li, Qinbin; Zhao, Chun

2013-06-28T23:59:59.000Z

375

Simulation and inversion of borehole temperature profiles in surrogate climates: Spatial distribution and surface coupling  

E-Print Network [OSTI]

simulations with the state-of-the-art ECHO-g model has been used to simulate underground temperature of the ECHO-g model to show that SAT-GST variations were closely related at low frequencies, suggesting-conduction forward model is driven by surface temperature time series provided with the ECHO-g integra- tions

Beltrami, Hugo

376

E-Print Network 3.0 - advanced distributed simulation Sample...  

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

The last section briefly summarizes the results... and recommendations from the CAX. 2. Distributed ... Source: Borissova, Daniela - Institute of Information and...

377

A computer system for access to distributed genome mapping data  

SciTech Connect (OSTI)

Development of a computer system for access to distributed genome mapping data is continuing. This effort is to develop software which accesses multiple databases and retrieves data which contain information useful for accelerating mapping human chromosomes. For example, the molecular sequence databases (GenBank, EMBL Data Library, PIR, SwissProt) which contain data required for the development of oligonucleotides for probing DNA as well as for extracting data for primer pair development for PCR-based methods. It is also to develop software which qualitatively integrates the following mapping data: (1) markers regionally localized using cytogenetic methods, (2) polymorphic markers ordered by genetic linkage analysis, (3) clones ordered by various finger-printing'' methods, (4) fragments ordered by long-range restriction mapping, (5) single genomic fragments or clones that have STSs assigned to them, (6) nucleotide sequences, (7) the associated metadata such as the submitting investigator's name, location, etc; the source organism; the chromosome the element is from; the chromosomal location is whatever detail is available.

Marr, T.G.

1992-02-05T23:59:59.000Z

378

HYBRID GROUND SOURCE HEAT PUMP SYSTEM SIMULATION USING VISUAL MODELING TOOL FOR HVACSIM+  

E-Print Network [OSTI]

HYBRID GROUND SOURCE HEAT PUMP SYSTEM SIMULATION USING VISUAL MODELING TOOL FOR HVACSIM+ M.H. Khan, 74078, USA ABSTRACT This paper presents a simulation of a hybrid ground source heat pump system, performed using a new graphical user interface for HVACSIM+. Hybrid ground source heat pump systems

379

Co-simulation for performance prediction of integrated building and HVAC systems -An analysis of solution  

E-Print Network [OSTI]

Co-simulation for performance prediction of integrated building and HVAC systems - An analysis performance simulation of buildings and heating, ventilation and air- conditioning (HVAC) systems can help, heating, ventilation and air-conditioning (HVAC) systems are responsible for 10%-60% of the total building

380

Leakage diagnostics, sealant longevity, sizing and technologytransfer in residential thermal distribution systems: Part II.Residential thermal Distribution Systesm, Phase VI FinalReport  

SciTech Connect (OSTI)

This report builds on and extends our previous efforts as described in "Leakage Diagnostics, Sealant Longevity, Sizing and Technology Transfer in Residential Thermal Distribution Systems- CIEE Residential Thermal Distribution Systems Phase V Final Report, October 1997". New developments include defining combined duct and equipment efficiencies in a concept called "Tons At the Register" and on performance issues related to field use of the aerosol sealant technology. Some of the key results discussed in this report include: o Register, boot and air handler cabinet leakage can often represent a significant fraction of the total duct leakage in new construction. Because of the large range of pressures in duct systems an accurate characterization may require separating these components through improved leakage testing. o Conventional duct tape failed our accelerated longevity testing and is not, therefore, considered generally acceptable for use in sealing duct systems. Many other tapes and sealing approaches are available and practical and have passed our longevity tests. o Simulations of summer temperature pull-down time have shown that duct system improvements can be combined with equipment downsizing to save first cost, energy consumption, and peak power and still provide equivalent or superior comfort. o Air conditioner name plate capacity ratings alone are a poor indicator of how much cooling will actually be delivered to the conditioned space. Duct system efficiency can have as large an impact on performance as variations in SEER. o Mechanical duct cleaning techniques do not have an adverse impact on the ducts sealed with the Aerosol sealant. The material typically used in Aerosol sealing techniques does not appear to present a health or safety hazard. Results from this study were used by the California Energy Commission in the formation of the current Energy Efficiency Standards for Low-Rise Residential Buildings (CEC, (1998)), often referred to as Title 24. Current information on ducts and thermal distribution research can be found at http://ducts.lbl.gov

Buchanan, C.; Modera, M.; Sherman, M.; Siegel, J.; Walker, I.; Wang, D.

1998-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Thermal decay in underfloor air distribution (UFAD) systems: Fundamentals and influence on system performance  

E-Print Network [OSTI]

Underfloor Air Distribution (UFAD) Design Guide. Atlanta:for design cooling loads in underfloor air distribution (

Lee, Kwang Ho; Schiavon, Stefano; Bauman, Fred; Webster, Tom

2012-01-01T23:59:59.000Z

382

Numerical simulation via parallel-distributed computing of energy absorption by metal deformation  

SciTech Connect (OSTI)

Collapsible steering column designs are credited with saving tens-of-thousands of lives since their introduction in the late 1960`s. The collapsible steering column is a safety feature designed to absorb energy and protect-the driver in a head-on collision. One of the most frequently used design concepts employs two telescoping metal tubes that slide over one another as the occupant impacts the steering wheel. Hardened steel ball bearings are embedded in a plastic sleeve located between the two tubes. There are two primary mechanisms for energy absorption during steering column collapse. One is the friction between the bearing and tube surfaces. Another is the gouging of the tubes` surfaces by the bearings. Current analytical models are unable to adequately capture the physics behind this process. In this paper we will present an overview of a parallel finite element code, currently under development, that can be used to simulate the highly nonlinear response of this energy absorbing mechanism. Our parallel algorithms are constructed on a message-passing foundation. The actual message-passing implementation used was the Argonne-developed p4 package. However, other message-passing libraries can easily be accommodated as they are largely identical in function and differ only in syntax. Once the algorithm is restructured as a set of processes communicating through messages, the program can run on systems as diverse as a uniprocessor workstation, multiprocessors with and without shared memory, a group of workstations that communicate over a local network, or any combination of the above. Benchmarks of the parallel code performance on networks of workstations and the IBM SP1 parallel supercomputer will be discussed.

Plaskacz, E.J.; Kulak, R.F.

1995-07-01T23:59:59.000Z

383

Control and regulation of modern distribution system, ForskEL...  

Open Energy Info (EERE)

idProject)&oldid405598" Categories: Smart Grid Projects Smart Grid Projects in Europe Smart Grid Projects - Grid Automation Distribution Smart Grid Projects - Smart Meter and AMI...

384

air distribution system: Topics by E-print Network  

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

by bringingArnold Schwarzenegger Governor AIR QUALITY IMPACTS OF DISTRIBUTED GENERATION IN THE SOUTH COAST AIR Board, South Coast Air Quality Management District, and San...

385

air distribution systems: Topics by E-print Network  

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

by bringingArnold Schwarzenegger Governor AIR QUALITY IMPACTS OF DISTRIBUTED GENERATION IN THE SOUTH COAST AIR Board, South Coast Air Quality Management District, and San...

386

Distributed Generation Study/Patterson Farms CHP System Using...  

Open Energy Info (EERE)

Biogas < Distributed Generation Study Jump to: navigation, search Study Location Auburn, New York Site Description Agricultural Study Type Field Test Technology Internal Combustion...

387

EF: Interference in communication (I) Numerical Simulation of Nonlinear Interference in Radio Systems  

E-Print Network [OSTI]

of inter- and intra-system electromagnetic interference (EMI). Using appropriate analysis and simulation Inter. Confer. on Electromagnetic Interference and Compatibility (INCEMIC'97), Dec. 3-5, Hyderabad

Loyka, Sergey

388

Scaled modeling and simulation of ocean wave linear generator buoy systems.  

E-Print Network [OSTI]

??Accurate scaled modeling and simulation are critical to advancing ocean wave linear generator buoys. A 100th scaled model of ocean wave generator buoy systems is (more)

Gore, Ganesh P.

2006-01-01T23:59:59.000Z

389

Secure Fragment Allocation in a Distributed Storage System with Heterogeneous Vulnerabilities  

E-Print Network [OSTI]

Secure Fragment Allocation in a Distributed Storage System with Heterogeneous Vulnerabilities Yun--There is a growing demand for large-scale dis- tributed storage systems to support resource sharing and fault attention has yet been paid to security solutions designed for distributed storage systems

Qin, Xiao

390

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System  

E-Print Network [OSTI]

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System Combined Heat and Power System by Zachary Mills Norwood Doctor of Philosophy in the Energy and Resources of analysis of Distributed Concentrating Solar Combined Heat and Power (DCS-CHP) systems is a design

California at Berkeley, University of

391

Development of Models to Simulate Tracer Tests for Characterization of Enhanced Geothermal Systems  

SciTech Connect (OSTI)

A recent report found that power and heat produced from enhanced (or engineered) geothermal systems (EGSs) could have a major impact on the U.S energy production capability while having a minimal impact on the environment. EGS resources differ from high-grade hydrothermal resources in that they lack sufficient temperature distribution, permeability/porosity, fluid saturation, or recharge of reservoir fluids. Therefore, quantitative characterization of temperature distributions and the surface area available for heat transfer in EGS is necessary for the design and commercial development of the geothermal energy of a potential EGS site. The goal of this project is to provide integrated tracer and tracer interpretation tools to facilitate this characterization. This project was initially focused on tracer development with the application of perfluorinated tracer (PFT) compounds, non-reactive tracers used in numerous applications from atmospheric transport to underground leak detection, to geothermal systems, and evaluation of encapsulated PFTs that would release tracers at targeted reservoir temperatures. After the 2011 midyear review and subsequent discussions with the U.S. Department of Energy Geothermal Technology Program (GTP), emphasis was shifted to interpretive tool development, testing, and validation. Subsurface modeling capabilities are an important component of this project for both the design of suitable tracers and the interpretation of data from in situ tracer tests, be they single- or multi-well tests. The purpose of this report is to describe the results of the tracer and model development for simulating and conducting tracer tests for characterizing EGS parameters.

Williams, Mark D.; Reimus, Paul; Vermeul, Vincent R.; Rose, Peter; Dean, Cynthia A.; Watson, Tom B.; Newell, D.; Leecaster, Kevin; Brauser, Eric

2013-05-01T23:59:59.000Z

392

A Performance Comparison of Tree and Ring Topologies in Distributed System  

SciTech Connect (OSTI)

A distributed system is a collection of computers that are connected via a communication network. Distributed systems have become commonplace due to the wide availability of low-cost, high performance computers and network devices. However, the management infrastructure often does not scale well when distributed systems get very large. Some of the considerations in building a distributed system are the choice of the network topology and the method used to construct the distributed system so as to optimize the scalability and reliability of the system, lower the cost of linking nodes together and minimize the message delay in transmission, and simplify system resource management. We have developed a new distributed management system that is able to handle the dynamic increase of system size, detect and recover the unexpected failure of system services, and manage system resources. The topologies used in the system are the tree-structured network and the ring-structured network. This thesis presents the research background, system components, design, implementation, experiment results and the conclusions of our work. The thesis is organized as follows: the research background is presented in chapter 1. Chapter 2 describes the system components, including the different node types and different connection types used in the system. In chapter 3, we describe the message types and message formats in the system. We discuss the system design and implementation in chapter 4. In chapter 5, we present the test environment and results, Finally, we conclude with a summary and describe our future work in chapter 6.

Min Huang

2005-12-19T23:59:59.000Z

393

Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses  

E-Print Network [OSTI]

turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics...

Chen, Qiang

2005-08-29T23:59:59.000Z

394

Using online simulation in Holonic Manufacturing Systems Olivier Cardin a,b  

E-Print Network [OSTI]

Using online simulation in Holonic Manufacturing Systems Olivier Cardin a,b , Pierre Castagna a) 228092025 ; Fax : +33 (0) 228092021 Abstract This paper deals with the use of online simulation on Holonic. In the PROSA reference architecture, staff holons were chosen to welcome the simulation models and the observer

Paris-Sud XI, Université de

395

Systems Oriented Epistemology and Testimony Theories of testimony | A simulation model | Conclusions  

E-Print Network [OSTI]

Systems Oriented Epistemology and Testimony Theories of testimony | A simulation model.S. Zollman Carnegie Mellon University Problem of testimony Theories of testimony | A simulation model University Three views Theories of testimony | A simulation model | Conclusions The views | Two methods in SE

Zollman, Kevin

396

Systems Oriented Epistemology and Testimony Theories of testimony | A simulation model | Conclusions  

E-Print Network [OSTI]

Systems Oriented Epistemology and Testimony Theories of testimony | A simulation model | A simulation model | Conclusions Two questions What is our epistemic warrant for believing testimony? Who.S. Zollman Carnegie Mellon University Three views Theories of testimony | A simulation model | Conclusions

Zollman, Kevin

397

Application of different levels of simulation to solid waste management systems  

SciTech Connect (OSTI)

Simulation techniques can be effectively applied to solid waste management systems, as an aid to understanding and analyzing existing systems or as part of the planning and design of new systems. Analysis of these systems using simulations can proceed at various levels of detail, depending on particular needs of the analysis (i.e., the questions for which answers are sought). This paper discusses the major system dimension variables for simulation of solid waste management systems, and how they can be related to each other to plan or understand a solid waste management system. Examples of the simulations at different levels of detail are included. In addition, the selection of appropriate simulation tools is addressed.

Holter, G.M.; Shaver, S.R.; Armacost, L.L.; Ross, T.L.

1993-11-01T23:59:59.000Z

398

Open systems dynamics: Simulating master equations in the computer  

E-Print Network [OSTI]

Master equations are probably the most fundamental equations for anyone working in quantum optics in the presence of dissipation. In this context it is then incredibly useful to have efficient ways of coding and simulating such equations in the computer, and in this notes I try to introduce in a comprehensive way how do I do so, focusing on Matlab, but making it general enough so that it can be directly translated to any other language or software of choice. I inherited most of my methods from Juan Jos\\'{e} Garc\\'{\\i}a-Ripoll (whose numerical abilities I cannot praise enough), changing them here and there to accommodate them to the way my (fairly limited) numerical brain works, and to connect them as much as possible to how I understand the theory behind them. At present, the notes focus on how to code master equations and find their steady state, but I hope soon I will be able to update them with time evolution methods, including how to deal with time-dependent master equations. During the last 4 years I've tested these methods in various different contexts, including circuit quantum electrodynamics, the laser problem, optical parametric oscillators, and optomechanical systems. Comments and (constructive) criticism are greatly welcome, and will be properly credited and acknowledged.

Carlos Navarrete-Benlloch

2015-04-21T23:59:59.000Z

399

Toward an Earth System Modeling Approach to Simulate Irrigation...  

Office of Science (SC) Website

the Community Land Model version 4 (CLM4) against observations from agricultural census data, improving the model's simulations of hydrological changes resulting from irrigation...

400

Co-simulation of innovative integrated HVAC systems in buildings  

E-Print Network [OSTI]

Integrated Simulation for HVAC Per- formance Prediction:air-conditioning equipment models (HVAC BESTEST), volume 1:air-conditioning equipment models (HVAC BESTEST), volume 2:

Trcka, Marija

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Emergency reconfiguration and distribution system planning under the Single-Contingency Policy  

E-Print Network [OSTI]

Emergency reconfiguration can improve distribution systems' reliability by enabling load transfer among substations. Previous studies, although present its operation strategies, seldom explore emergency reconfiguration's ...

Wang, J.

402

A multiobjective, multidisciplinary design optimization methodology for the conceptual design of distributed satellite systems  

E-Print Network [OSTI]

A multiobjective, multidisciplinary design optimization methodology for mathematically modeling the distributed satellite system (DSS) conceptual design problem as an optimization problem has been developed to advance the ...

Jilla, Cyrus D., 1974-

2002-01-01T23:59:59.000Z

403

Leader Election in Distributed Systems with Crash Failures Scott D. Stoller  

E-Print Network [OSTI]

Leader Election in Distributed Systems with Crash Failures Scott D. Stoller Dept. of Computer ed Bully Algorithm satis es this speci cation. Keywords: leader election, synchronous, asynchronous

Stoller, Scott

404

Field Test of Room-to-Room Distribution of Outside Air with Two Residential Ventilation Systems  

SciTech Connect (OSTI)

Uniform distribution of outside air is one way to ensure that residential dilution ventilation systems will provide a known amount of fresh air to all rooms.

Hendron, R.; Anderson, R.; Barley, D.; Rudd, A.; Townsend, A.; Hancock, E.

2008-08-01T23:59:59.000Z

405

Impact of dispersed solar and wind systems on electric distribution planning and operation  

SciTech Connect (OSTI)

Small-scale dispersed solar photovoltaic and wind generation (DSW) will affect the generation, transmission, and distribution systems of an electric utility. This study examines the technical and economic impacts of dispersing DSW devices within the distribution system. Dispersed intermittent generation is included. Effects of DSW devices on capital investments, reliability, operating and maintenance costs, protection requirements, and communication and control requirements are examined. A DSW operation model is developed to help determine the dependable capacity of fluctuating solar photovoltaic and wind generation as part of the distribution planning process. Specific case studies using distribution system data and renewable resource data for Southern California Edison Company and Consumers Power Company are analyzed to gain insights into the effects of interconnecting DSW devices. The DSW devices were found to offer some distribution investment savings, depending on their availability during peak loads. For a summer-peaking utility, for example, dispersing photovoltaic systems is more likely to defer distribution capital investments than dispersing wind systems. Dispersing storage devices to increase DSW's dependable capacity for distribution systems needs is not economically attractive. Substation placement of DSW and storage devices is found to be more cost effective than feeder or customer placement. Examination of the effects of DSW on distribution system operation showed that small customer-owned DSW devices are not likely to disrupt present time-current distribution protection coordination. Present maintenance work procedures, are adequate to ensure workmen's safety. Regulating voltages within appropriate limits will become more complex with intermittent generation along the distribution feeders.

Boardman, R.W.; Patton, R.; Curtice, D.H.

1981-02-01T23:59:59.000Z

406

The Development of a Smart Distribution Grid Testbed for Integrated Information Management Systems  

SciTech Connect (OSTI)

This paper presents a smart distribution grid testbed to test or compare designs of integrated information management systems (I2MSs). An I2MS extracts and synthesizes information from a wide range of data sources to detect abnormal system behaviors, identify possible causes, assess the system status, and provide grid operators with response suggestions. The objective of the testbed is to provide a modeling environment with sufficient data sources for the I2MS design. The testbed includes five information layers and a physical layer; it generates multi-layer chronological data based on actual measurement playbacks or simulated data sets produced by the physical layer. The testbed models random hardware failures, human errors, extreme weather events, and deliberate tampering attempts to allow users to evaluate the performance of different I2MS designs. Initial results of I2MS performance tests showed that the testbed created a close-to-real-world environment that allowed key performance metrics of the I2MS to be evaluated

Lu, Ning; Du, Pengwei; Paulson, Patrick R.; Greitzer, Frank L.; Guo, Xinxin; Hadley, Mark D.

2011-01-31T23:59:59.000Z

407

The Development of a Smart Distribution Grid Testbed for Integrated Information Management Systems  

SciTech Connect (OSTI)

This paper presents a smart distribution grid testbed to test or compare designs of integrated information management systems (I2MSs). An I2MS extracts and synthesizes information from a wide range of data sources to detect abnormal system behaviors, identify possible causes, assess the system status, and provide grid operators with response suggestions. The objective of the testbed is to provide a modeling environment with sufficient data sources for the I2MS design. The testbed includes five information layers and a physical layer; it generates multi-layer chronological data based on actual measurement playbacks or simulated data sets produced by the physical layer. The testbed models random hardware failures, human errors, extreme weather events, and deliberate tampering attempts to allow users to evaluate the performance of different I2MS designs. Initial results of I2MS performance tests showed that the testbed created a close-to-real-world environment that allowed key performance metrics of the I2MS to be evaluated.

Lu, Ning; Du, Pengwei; Paulson, Patrick R.; Greitzer, Frank L.; Guo, Xinxin; Hadley, Mark D.

2011-07-28T23:59:59.000Z

408

The role of vertical buoyancy distributions in simulated low-topped supercells  

E-Print Network [OSTI]

. This study examines the role of low-level vertical buoyancy distributions in influencing supercell updraft intensity and persistence, and on mid-level and low-level mesocyclone development. The emphasis is to examine wind, temperature, and moisture profiles...

Cantrell, Louis Edward

1995-01-01T23:59:59.000Z

409

Fidelity of Analytic Drop Size Distributions in Drizzling Stratiform Clouds Based on Large-Eddy Simulations  

E-Print Network [OSTI]

Cloud microphysical parameterizations and retrievals rely heavily on knowledge of the shape of drop size distributions (DSDs). Many investigations assume that DSDs in the entire or partial drop size range may be approximated ...

Kogan, Yefim L.; Kogan, Zena N.; Mechem, David B.

2009-08-01T23:59:59.000Z

410

The Design of a New Freight Distribution System in Venice1  

E-Print Network [OSTI]

1 The Design of a New Freight Distribution System in Venice1 Flavio Baita, Carlos Daganzo, Walter the transshipment operations from trucks to boats, and the organization of the boat distribution. Currently. Introduction The role of distribution logistics, as a strategic factor for competitive advantage in many

Daganzo, Carlos F.

411

Introducing Flexible Quantity Contracts into Distributed SoC and Embedded System Design Processes  

E-Print Network [OSTI]

Introducing Flexible Quantity Contracts into Distributed SoC and Embedded System Design Processes and flexible contracts regulate cooperation and cost distribution. The process ef- fectively delays the design a distributed design process. Today we already find dis- tributed design processes in automotive engineering

Paris-Sud XI, Université de

412

Distributed control for reconfigurable FPGA systems: a high-level design approach  

E-Print Network [OSTI]

Distributed control for reconfigurable FPGA systems: a high-level design approach Chiraz Trabelsi to increase design productivity. This approach combines control distribution and high-level modeling in order to decrease design complexity and enhance design reuse and scalability. Control distribution is based

Paris-Sud XI, Université de

413

RateGuard: A Robust Distributed Denial of Service (DDoS) Defense System  

E-Print Network [OSTI]

, USA chao@poly.edu Abstract--One of the major threats to cyber security is the Distributed Denial-Rate TCP Attacks. I. INTRODUCTION One of the major threats to cyber security is the Distributed DenialRateGuard: A Robust Distributed Denial of Service (DDoS) Defense System Huizhong Sun ECE

Chao, Jonathan

414

New Automotive Air Conditioning System Simulation Tool Developed in MATLAB/Simulink  

SciTech Connect (OSTI)

Further improvements in vehicle fuel efficiency require accurate evaluation of the vehicle's transient total power requirement. When operated, the air conditioning (A/C) system is the largest auxiliary load on a vehicle; therefore, accurate evaluation of the load it places on the vehicle's engine and/or energy storage system is especially important. Vehicle simulation software, such as 'Autonomie,' has been used by OEMs to evaluate vehicles' energy performance. A transient A/C simulation tool incorporated into vehicle simulation models would also provide a tool for developing more efficient A/C systems through a thorough consideration of the transient A/C system performance. The dynamic system simulation software Matlab/Simulink was used to develop new and more efficient vehicle energy system controls. The various modeling methods used for the new simulation tool are described in detail. Comparison with measured data is provided to demonstrate the validity of the model.

Kiss, T.; Chaney, L.; Meyer, J.

2013-07-01T23:59:59.000Z

415

Assessing business models arising from the integration of distributed energy systems in the Chilean electric power system  

E-Print Network [OSTI]

Electric power systems are more than just networks of generation, transmission and distribution assets. They are socio-technical systems, involving regulation, markets and technology availability. Presently, the dynamic ...

Le Dantec, Jorge I. (Jorge Ignacio)

2014-01-01T23:59:59.000Z

416

Local distributed algorithms for multi-robot systems  

E-Print Network [OSTI]

The field of swarm robotics focuses on controlling large populations of simple robots to accomplish tasks more effectively than what is possible using a single robot. This thesis develops distributed algorithms tailored ...

Cornejo Collado, Alejandro

2013-01-01T23:59:59.000Z

417

Distributed fiber optic intrusion sensor system for monitoring long perimeters  

E-Print Network [OSTI]

A distributed sensor using an optical fiber for detecting and locating intruders over long perimeters (>10 km) is described. Phase changes resulting from either the pressure of the intruder on the ground immediately above the buried fiber or from...

Juarez, Juan C.

2009-06-02T23:59:59.000Z

418

Heat transfer pathways in underfloor air distribution (UFAD) systems  

E-Print Network [OSTI]

room cooling load, room air setpoint, and supply air temper-distribution of room cooling load into the supply plenum orof room cooling load between the underfloor supply plenum

Bauman, F.; Jin, H.; Webster, T.

2006-01-01T23:59:59.000Z

419

Applications of an electronic transformer in a power distribution system  

E-Print Network [OSTI]

In electrical power distribution and power electronic applications, a transformer is an indispensable component which performs many functions. At its operating frequency (60/50 Hz), it is one of the most bulky and expensive components. The concept...

Ratanapanachote, Somnida

2005-11-01T23:59:59.000Z

420

Long-term effects of anthropogenic CO2 emissions simulated with a complex earth system model  

E-Print Network [OSTI]

Long-term effects of anthropogenic CO2 emissions simulated with a complex earth system model Uwe earth system model con- sisting of an atmospheric general circulation model, an ocean general

Winguth, Arne

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Test procedures and protocols: Their relevance to the figure of merit for thermal distribution systems. Volume 1: Informal report  

SciTech Connect (OSTI)

A conceptual framework is developed that categorizes measurement protocols for forced-air thermal distribution systems in small buildings. This framework is based on the distinction between two generic approaches. The {open_quote}system-comparison{close_quote} approach seeks to determine, via a pair of whole-house energy-use measurements, the difference in energy use between the house with the as-found duct system and the same house with no energy losses attributable to the thermal distribution system. The {open_quote}component loss-factor{close_quote} approach identifies and measures the individual causes of duct losses, and then builds up a value for the net overall duct efficiency, usually with the help of computer simulation. Examples of each approach are analyzed and related to a proposed Figure of Merit for thermal distribution systems. This Figure of Merit would serve as the basis for a Standard Method of Test analogous to those already in place for furnaces, boilers, air conditioners, and heat pumps.

Andrews, J.W.

1993-09-01T23:59:59.000Z

422

Evaluating the Effectiveness of Mixed Reality Simulations for Developing UAV Systems  

E-Print Network [OSTI]

Evaluating the Effectiveness of Mixed Reality Simulations for Developing UAV Systems Ian Yen Aerial Vehicle (UAV) system can be long and challenging. Mixed Reality (MR) simulations can reduce cost for prototyping a UAV sys- tem to be deployed for a dairy farming monitoring task. We show that by augmenting

Sun, Jing

423

A Simulation Tool for Real-time Systems using Environmental Energy Harvesting Maryline CHETTO  

E-Print Network [OSTI]

, the system operates in a so-called energy neutral mode by consuming only as much energy as harvested. The simulator enables to construct an optimal schedule for any task set, battery capacity and energy sourceA Simulation Tool for Real-time Systems using Environmental Energy Harvesting Maryline CHETTO

Paris-Sud XI, Université de

424

Nested stochastic simulation algorithms for chemical kinetic systems with multiple time scales  

E-Print Network [OSTI]

Nested stochastic simulation algorithms for chemical kinetic systems with multiple time scales as Gillespie's algorithm. It is in the form of a nested SSA and uses an outer SSA to simulate the slow in the system, derive effective dynamics on the slow time scale, and provide error estimates for the nested SSA

Van Den Eijnden, Eric

425

A Queueing Based Scheduling Approach to Plug-In Electric Vehicle Dispatch in Distribution Systems  

E-Print Network [OSTI]

Large-scale integration of plug-in electric vehicles (PEV) in power systems can cause severe issues to the existing distribution system, such as branch congestions and significant voltage drops. As a consequence, smart charging strategies are crucial for the secure and reliable operation of the power system. This paper tries to achieve high penetration level of PEVs with the existing distribution system infrastructure by proposing a smart charging algorithm that can optimally utilize the distribution system capacity. Specifically, the paper proposes a max-weight PEV dispatch algorithm to control the PEV charging rates, subject to power system physical limits. The proposed max-weight PEV dispatch algorithm is proved to be throughput optimal under very mild assumptions on the stochastic dynamics in the system. This suggests that the costly distribution system infrastructure upgrade can be avoided, or failing that, at least successfully deferred. The proposed PEV dispatch algorithm is particularly attractive in ...

Li, Qiao; Ilic, Marija D

2012-01-01T23:59:59.000Z

426

Field Test of a DHW Distribution System: Temperature and Flow Analyses (Presentation)  

SciTech Connect (OSTI)

This presentation discusses a field test of a DHW distribution system in an occupied townhome. It includes measured fixture flows and temperatures, a tested recirculation system, evaluated disaggregation of flow by measured temperatures, Aquacraft Trace Wizard analysis, and comparison.

Barley, C. D.; Hendron, B.; Magnusson, L.

2010-05-13T23:59:59.000Z

427

Water Distribution System Monitoring and Decision Support Using a Wireless Sensor Network  

E-Print Network [OSTI]

Water distribution systems comprise labyrinthine networks of pipes, often in poor states of repair, that are buried beneath our city streets and relatively inaccessible. Engineers who manage these systems need reliable ...

Allen, Michael

428

Design and evaluation of a cellular rectifier system with distributed control  

E-Print Network [OSTI]

This paper presents the design and experimental evaluation of a six-cell 6 kW cellular (parallel) rectifier system which operates at nearly unity power factor. The cellular rectifier system implements both distributed load ...

Perreault, David J.

429

Innovative Distributed Power Grid Interconnection and Control Systems: Final Report, December 11, 2000 - August 30, 2005  

SciTech Connect (OSTI)

The contract goal was to further advance distributed generation in the marketplace by making installations more cost-effective and compatible with existing systems. This was achieved by developing innovative grid interconnection and control systems.

DePodesta, K.; Birlingmair, D.; West, R.

2006-03-01T23:59:59.000Z

430

PAR and Supply Distribution System The PAR Program is administered by Materials Logistics (Central Distribution)  

E-Print Network [OSTI]

Logistics (Central Distribution) Services, a division of Materials Management. The PAR Program is focused Administration: 1. See attached exhibit Models, 1-3 2. See Related Materials Management Forms 3. Weekly action group meeting(s) established to continue the work and ensuring good supply chain/materials management

Oliver, Douglas L.

431

Commercial thermal distribution systems, Final report for CIEE/CEC  

E-Print Network [OSTI]

air-volume HVAC systems, static pressures across theIn VAY HVAC systems, the static pressures may likely changefor the Static Pressure Analysis Tool are: HVAC schedule

Xu, T.

2011-01-01T23:59:59.000Z

432

A flight software development and simulation framework for advanced space systems  

E-Print Network [OSTI]

Distributed terrestrial computer systems employ middleware software to provide communications abstractions and reduce software interface complexity. Embedded applications are adopting the same approaches, but must make ...

Enright, John Patrick, 1974-

2002-01-01T23:59:59.000Z

433

Simulations of Solar System observations in alternative theories of gravity  

E-Print Network [OSTI]

In this communication, we focus on the possibility to test General Relativity (GR) with radioscience experiments. We present simulations of observables performed in alternative theories of gravity using a software that simulates Range/Doppler signals directly from the space time metric. This software allows one to get the order of magnitude and the signature of the modifications induced by an alternative theory of gravity on radioscience signals. As examples, we present some simulations for the Cassini mission in Post-Einsteinian gravity (PEG) and with Standard Model Extension (SME).

A. Hees; B. Lamine; S. Reynaud; M. -T. Jaekel; C. Le Poncin-Lafitte; V. Lainey; A. Fzfa; J. -M. Courty; V. Dehant; P. Wolf

2013-02-27T23:59:59.000Z

434

Numerical simulation of flow distribution for pebble bed high temperature gas cooled reactors  

E-Print Network [OSTI]

?....................................................................................26 V CFD MODELLING ...................................................................................28 V.1 Computational Fluid Dynamics (CFD) ..........................................28 V.2 The History.... Hassan The premise of the work presented here is to use a common analytical tool, Computational Fluid Dynamics (CFD), along with different turbulence models. Eddy viscosity models as well as state-of-the-art Large Eddy Simulation (LES) were...

Yesilyurt, Gokhan

2004-09-30T23:59:59.000Z

435

Implementing a NTP-Based Time Service within a Distributed Middleware System  

E-Print Network [OSTI]

middleware system. We will also provide test results obtained using this time service. Keywords: Distributed the implementation of a NTP based time service used within NaradaBrokering, which is an open source distributed messaging system, messages are timestamped before they are issued. Local time is used for timestamping

436

Termination Detection in an Asynchronous Distributed System with Crash-Recovery  

E-Print Network [OSTI]

Termination Detection in an Asynchronous Distributed System with Crash-Recovery Failures Felix C 75083, USA 1 Termination Detection In practice, it cannot easily be detected whether a computation running in a distributed system has terminated or not. Thus, suitable observing algorithms are required

Mittal, Neeraj

437

Introduction to Focus Issue: Design and Control of Self-Organization in Distributed Active Systems  

E-Print Network [OSTI]

Introduction to Focus Issue: Design and Control of Self-Organization in Distributed Active Systems; published online 27 June 2008 Spatiotemporal self-organization is found in a wide range of distributed describe biological and chemical systems designed to exhibit spatiotemporal dynamics and the control

Showalter, Kenneth

438

A Design Model for Open Distributed Processing Systems Marten van Sinderen1  

E-Print Network [OSTI]

A Design Model for Open Distributed Processing Systems Marten van Sinderen1 , Luís Ferreira Pires1 these standards and consequently may decrease their price. The design and implementation of a distributed system, pires, vissers, katoen}@cs.utwente.nl Abstract This paper proposes design concepts that allow

van Sinderen, Marten

439

A Design Model for Open Distributed Processing Systems Marten van Sinderen1  

E-Print Network [OSTI]

A Design Model for Open Distributed Processing Systems Marten van Sinderen1 , Luís Ferreira Pires1 and consequently may decrease their price. The design and implementation of a distributed system is a complex, pires, vissers, katoen}@cs.utwente.nl Abstract This paper proposes design concepts that allow

Pires, Luís Ferreira

440

Flexible, Wide-Area Storage for Distributed Systems with WheelFS  

E-Print Network [OSTI]

WheelFS is a wide-area distributed storage system intended to help multi-site applications share data and gain fault tolerance. WheelFS takes the form of a distributed file system with a familiar POSIX interface. Its design ...

Stribling, Jeremy

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Cloud Computing and Distributed Systems Laboratory DEPT. OF COMPUTER SCIENCE AND SOFTWARE ENGINEERING  

E-Print Network [OSTI]

Cloud Computing and Distributed Systems Laboratory DEPT. OF COMPUTER SCIENCE AND SOFTWARE ENGINEERING THE UNIVERSITY OF MELBOURNE, AUSTRALIA The Cloud Computing and Distributed Systems (CLOUDS in 2008 by the CLOUDS lab at the University of Melbourne, facilitates the realization of the above vision

Melbourne, University of

442

Integrating Bulk-Data Transfer into the Aurora Distributed Shared Data System  

E-Print Network [OSTI]

Integrating Bulk-Data Transfer into the Aurora Distributed Shared Data System Paul Lu Dept version, with corrections to JPDC proofs 1 #12;Running Head: Integrating Bulk-Data Transfer into Aurora-1071 Web: http://www.cs.ualberta.ca/~paullu/ Abstract The Aurora distributed shared data system implements

Lu, Paul

443

GridBank: A Grid Accounting Services Architecture (GASA) for Distributed Systems Sharing and Integration  

E-Print Network [OSTI]

GridBank: A Grid Accounting Services Architecture (GASA) for Distributed Systems Sharing Australia Nedlands, Western Australia, 6009 barmouta@csse.uwa.edu.au Rajkumar Buyya Grid Computing and Distributed Systems (GRIDS) Lab Dept. of Computer Science and Software Engineering The University of Melbourne

Buyya, Rajkumar

444

THE INTEGRATION AND CONTROL OF MULTIFUNCTIONAL STATIONARY PV-BATTERY SYSTEMS IN SMART DISTRIBUTION GRID  

E-Print Network [OSTI]

) in presence of photovoltaic (PV) panel on the view of techno economic optimal sizing taking the considerationTHE INTEGRATION AND CONTROL OF MULTIFUNCTIONAL STATIONARY PV-BATTERY SYSTEMS IN SMART DISTRIBUTION stationary battery energy storage systems (BESS) in the public low-voltage distribution grid in order

Berning, Torsten

445

DISTRIBUTED REAL-TIME TASK MONITORING IN THE SAFETY-CRITICAL SYSTEM MELODY  

E-Print Network [OSTI]

-critical systems (such as nuclear power plants, distributed cooperation of autonomous robots in Outer Space that are typi- cally unpredictable, a very high amount of adaptability of sys- tem functions is demanded. SafetyDISTRIBUTED REAL-TIME TASK MONITORING IN THE SAFETY-CRITICAL SYSTEM MELODY Horst F. Wedde, Jon A

Wedde, Horst F.

446

NOVEL PRINCIPLES FOR DEVELOPING AND EVALUATING DISTRIBUTED SAFETY-CRITICAL SYSTEMS  

E-Print Network [OSTI]

. In safety-critical systems, (such as nuclear power plants, distributed cooperation of autonomous robotsNOVEL PRINCIPLES FOR DEVELOPING AND EVALUATING DISTRIBUTED SAFETY-CRITICAL SYSTEMS Horst F. Wedde, Jon A. Lind Informatik III University of Dortmund 44221 Dortmund / Germany Abstract Safety

Wedde, Horst F.

447

Multiplatform Dynamic System Simulation of a DC-DC Converter.  

E-Print Network [OSTI]

??The work presented in this paper focuses on the usability testing for the Open-Modelica. The modeling and simulation of the BMR450 DC-DC converter is also (more)

Song, Wenpeng

2012-01-01T23:59:59.000Z

448

Coupling Interface for Physics-to-System Simulations  

E-Print Network [OSTI]

of other OECD/NEA participants. Conversely, the coupled transient simulations showed a suspect, maximum average nodal component temperature rise of approximately 0.4K from a 3+$ reactivity insertion....

Leimon, Michael 1985-

2012-11-02T23:59:59.000Z

449

Simulating a storage-production system with three oilseed crops  

E-Print Network [OSTI]

This work developed a simulation model that is intended to be used for strategic investment decisions by a company that operates in a wide range of activities in the agriculture business in Brazil. Mostly, it is a tool ...

Figer, Luiz

2012-01-01T23:59:59.000Z

450

Distribution of Wind Power Forecasting Errors from Operational Systems (Presentation)  

SciTech Connect (OSTI)

This presentation offers new data and statistical analysis of wind power forecasting errors in operational systems.

Hodge, B. M.; Ela, E.; Milligan, M.

2011-10-01T23:59:59.000Z

451

Co-Simulation of Building Energy and Control Systems with the Building Controls Virtual Test Bed  

SciTech Connect (OSTI)

This article describes the implementation of the Building Controls Virtual Test Bed (BCVTB). The BCVTB is a software environment that allows connecting different simulation programs to exchange data during the time integration, and that allows conducting hardware in the loop simulation. The software architecture is a modular design based on Ptolemy II, a software environment for design and analysis of heterogeneous systems. Ptolemy II provides a graphical model building environment, synchronizes the exchanged data and visualizes the system evolution during run-time. The BCVTB provides additions to Ptolemy II that allow the run-time coupling of different simulation programs for data exchange, including EnergyPlus, MATLAB, Simulink and the Modelica modelling and simulation environment Dymola. The additions also allow executing system commands, such as a script that executes a Radiance simulation. In this article, the software architecture is presented and the mathematical model used to implement the co-simulation is discussed. The simulation program interface that the BCVTB provides is explained. The article concludes by presenting applications in which different state of the art simulation programs are linked for run-time data exchange. This link allows the use of the simulation program that is best suited for the particular problem to model building heat transfer, HVAC system dynamics and control algorithms, and to compute a solution to the coupled problem using co-simulation.

Wetter, Michael

2010-08-22T23:59:59.000Z

452

Simulation of vehicle traffic on an automatic highway system.  

SciTech Connect (OSTI)

A traffic simulator has been developed at Argonne National Laboratory to study highway traffic under various degrees of automation. The key components of this simulator include a global and a local Expert Driver Model, a human factor study, and a graphical user interface. Furthermore, an Autonomous Intelligent Cruise Control, which is based on a neural network controller, is described and results for two typical driving scenarios are given.

Hanebutte, U.; Doss, E.; Ewing, T.; Tentner, A.; Technology Development

1998-01-01T23:59:59.000Z

453

Published in AAAI Spring Symposium on Intelligent Embedded and Distributed Systems, March 2002. 1 Distributed Adaptive Constrained Optimization for Smart Matter Systems  

E-Print Network [OSTI]

Published in AAAI Spring Symposium on Intelligent Embedded and Distributed Systems, March 2002. 1 across the network, and solvers are controlled by an adaptive feedback mechanism that guar- antees timely) or damage identification (Wang & Chang 2000). Such systems will require control, sensing and diagnostic

Shang, Yi

454

Causes of variation in soil carbon simulations from CMIP5 Earth system models and comparison with observations  

E-Print Network [OSTI]

and benchmarks in Earth system models sitivity of the Amazonand benchmarks in Earth system models Thornton, P. E. ,simulations from CMIP5 Earth system models and comparison

2013-01-01T23:59:59.000Z

455

Three-dimensional simulations of inorganic aerosol distributions in east Asia during spring 2001  

E-Print Network [OSTI]

conditions of low dust loading, SO2 condensation and gas phase ammonia distribution determine the nitrate includes the on-line gas-aerosol thermodynamic module SCAPE II, and explicitly considers chemical aging of dust, is used in the analysis. The model is found to represent many of the important observed features

456

Inverter VAR Control for Distribution Systems with Masoud Farivar, Christopher R. Clarke, Steven H. Low , K. Mani Chandy  

E-Print Network [OSTI]

in [8], [9]. In Section IV, we present a simulation study of a real-world distribution circ solvable. Simulations of a real-world distribution circuit illustrates that the proposed inverter control by Southern California Edison's (SCE) plan to install 500MW of large commercial rooftop PV plants (each

Low, Steven H.

457

Enhancing student learning of two-level quantum systems with interactive simulations  

E-Print Network [OSTI]

The QuVis Quantum Mechanics Visualization project aims to address challenges of quantum mechanics instruction through the development of interactive simulations for the learning and teaching of quantum mechanics. In this article, we describe evaluation of simulations focusing on two-level systems developed as part of the Institute of Physics Quantum Physics resources. Simulations are research-based and have been iteratively refined using student feedback in individual observation sessions and in-class trials. We give evidence that these simulations are helping students learn quantum mechanics concepts at both the introductory and advanced undergraduate level, and that students perceive simulations to be beneficial to their learning.

Kohnle, Antje; Campbell, Anna; Korolkova, Natalia; Paetkau, Mark J

2015-01-01T23:59:59.000Z

458

RELIABILITY ANALYSIS OF THE ELECTRICAL POWER DISTRIBUTION SYSTEM TO SELECTED PORTIONS OF THE NUCLEAR HVAC SYSTEM  

SciTech Connect (OSTI)

A design requirement probability of 0.01 or less in a 4-hour period ensures that the nuclear heating, ventilation, and air-conditioning (HVAC) system in the primary confinement areas of the Dry Transfer Facilities (DTFs) and Fuel Handling Facility (FHF) is working during a Category 1 drop event involving commercial spent nuclear fuel (CSNF) assemblies (BSC 2004a , Section 5.1.1.48). This corresponds to an hourly HVAC failure rate of 2.5E-3 per hour or less, which is contributed to by two dominant causes: equipment failure and loss of electrical power. Meeting this minimum threshold ensures that a Category 1 initiating event followed by the failure of HVAC is a Category 2 event sequence. The two causes for the loss of electrical power include the loss of offsite power and the loss of onsite power distribution. Thus, in order to meet the threshold requirement aforementioned, the failure rate of mechanical equipment, loss of offsite power, and loss of onsite power distribution must be less than or equal to 2.5E-3 per hour for the nuclear HVAC system in the primary confinement areas of the DTFs and FHF. The loss of offsite power occurs at a frequency of 1.1E-5 per hour (BSC 2004a, Section 5.1.1.48). The purpose of this analysis is to determine the probability of occurrence of the unavailability of the nuclear HVAC system in the primary confinement areas of the DTFs and FHF due to loss of electrical power. In addition, this analysis provides insights on the contribution to the unavailability of the HVAC system due to equipment failure. The scope of this analysis is limited to finding the frequency of loss of electrical power to the nuclear HVAC system in the primary confinement areas of the DTFs and FHF.

N. Ramirez

2004-12-16T23:59:59.000Z

459

Distributed Control of Residential Energy Systems using a Market Maker  

E-Print Network [OSTI]

, in particular reverse power flow during daytime periods of peak generation coupled with low residential load distribution networks and shave peak demand without large-scale capital costs for feeder replacement.weller}@newcastle.edu.au) Abstract: The recent rapid uptake of residential solar photovoltaic (PV) installations provides many

Knobloch,Jürgen

460

Estimating Hurricane Outage and Damage Risk in Power Distribution System  

E-Print Network [OSTI]

curve and posterior fragility curve for Southern Pine, 12.47 kV distribution line ................................................................................. 79 Figure 7.9 Mean fraction failed of poles for 3 Hurricanes, prior fragility curve... Linear Models .................................................................. 4 2.2 Generalized Additive Models............................................................... 5 2.3 Model Fitting and Measuring Goodness of Fit...

Han, Seung Ryong

2009-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Gyrokinetic-Vlasov simulations of the ion temperature gradient turbulence in tokamak and helical systems  

SciTech Connect (OSTI)

Recent progress of the gyrokinetic-Vlasov simulations on the ion temperature gradient (ITG) turbulence in tokamak and helical systems is reported, where the entropy balance is checked as a reference for the numerical accuracy. The tokamak ITG turbulence simulation carried out on the Earth Simulator clearly captures a nonlinear generation process of zonal flows. The tera-flops and tera-bytes scale simulation is also applied to a helical system with the same poloidal and toroidal periodicities of L = 2 and M = 10 as in the Large Helical Device.

Watanabe, T.-H.; Sugama, H. [National Institute for Fusion Science, Toki, Gifu 509-5292 (Japan); Graduate University for Advanced Studies (Sokendai), Toki, Gifu 509-5292 (Japan); Ferrando i Margalet, S. [National Institute for Fusion Science, Toki, Gifu 509-5292 (Japan)

2006-11-30T23:59:59.000Z

462

Long-Term Succession of Structure and Diversity of a Biofilm Formed in a Model Drinking Water Distribution System  

E-Print Network [OSTI]

formation in a model drinking water distribution system. J.and activity in drinking water distribution networks underbacterial species from drinking water biofilms and proof of

Martiny, A. C; Jorgensen, T. M; Albrechtsen, H.-J.; Arvin, E.; Molin, S.

2003-01-01T23:59:59.000Z

463

Distributed optimization and market analysis of networked systems  

E-Print Network [OSTI]

In the interconnected world of today, large-scale multi-agent networked systems are ubiquitous. This thesis studies two classes of multi-agent systems, where each agent has local information and a local objective function. ...

Wei, Ermin

2014-01-01T23:59:59.000Z

464

Distributed Forcing of Forecast and Assimilation Error Systems BRIAN F. FARRELL  

E-Print Network [OSTI]

Distributed Forcing of Forecast and Assimilation Error Systems BRIAN F. FARRELL Division forecast system gov- erning forecast error growth and the tangent linear observer system governing deterministic and stochastic forcings of the forecast and observer systems over a chosen time interval

Farrell, Brian F.

465

A co-simulation framework for design of time-triggered automotive cyber physical systems  

E-Print Network [OSTI]

A co-simulation framework for design of time-triggered automotive cyber physical systems Zhenkai Automotive control system SystemC a b s t r a c t Designing cyber-physical systems (CPS) is challenging due to the tight interactions between software, network/platform, and physical components. Automotive control sys

Koutsoukos, Xenofon D.

466

Award ER25844: Minimizing System Noise Effects for Extreme-Scale Scientific Simulation Through Function Delegation  

SciTech Connect (OSTI)

In software running on distributed computing clusters, time spent on communication between nodes in the cluster can be a significant portion of the overall computation time; background operating system tasks and other computational ?noise? on the nodes of the system can have a significant impact on the amount of time this communication takes, especially on large systems. The research completed in this period has improved understanding of when such noise will have a significant impact. Specifically, it was demonstrated that not just noise on the nodes, but also noise on the network between nodes can have a significant impact on computation time. It was also demonstrated that noise patterns matter more than noise intensity: very regular noise can cause less disruption than lighter (on average) but less regular noise. It was also demonstrated that the effect of noise is more prominent as the speed of the network between nodes is increased. Furthermore, a tracing tool, Netgauge, was improved via our work, and a system simulator, LogGOPSim, was developed; they can be used by application developers to improve performance of their program and by system designers to mitigate the effects of noise by adjusting the noise characteristics of the operating system. Both have been made freely available as open source programs. In the course of developing these tools, we demonstrated weaknesses in existing methodologies for modeling communication, and we introduced a more detailed model, LogGOPS, for simulating systems. Not only were the deleterious effects of noise explored but we have also offered solutions. Our studies of simulations of system noise have led to specific recommendations on tuning systems to mitigate noise. We have also improved existing approaches to mitigating noise. ?Non-blocking collective communication? avoids the effects of noise by letting communication continue simultaneously with computation (thus being ?non-blocking?), so that the delays in communication introduced by noise have a smaller impact on overall computation time. Potentially, noise can be reduced much further by ?offloading? communication tasks to a separate processing element than the operating system is using. We have improved our library LibNBC, which provides an implementation of non-blocking collectives, via this work. During this research, our proposal to include non-blocking collectives (which used LibNBC as a reference implementation) in the upcoming MPI-3 standard was accepted. As MPI is a ubiquitous and important standard for communication in parallel computing, this demonstrates a certain acceptance of the practicality and desirability of non-blocking collectives. Now that non-blocking collectives are a part of the standard we can expect to see optimized platform-specific implementations of non-blocking collectives. Also as part of this work we have also developed a language GOAL (Global Operation Assembly Language) that can be used as a starting point for defining languages to express optimized communication algorithms.

Lumsdaine, Andrew

2012-11-20T23:59:59.000Z

467

Energy Management of Steam Distribution Systems Through Energy Audits and Computerized Reporting Programs  

E-Print Network [OSTI]

ENERGY KANAGEKBNT OF STEAM DISTRIBUTION SYSTEMS THROUGH BNKRGY AUDITS AND COItPlTl'ERIZED REPORTING PROGRAtIS NORMAN J. RIVERS and HARTIN MANDZUK Armstrong Machine Works, Inc. Three Rivers, Michigan ABSTRACT This presentation will highlight... the economic losses associated with steam distribution systems and how to establish good energy management programs to reduce energy cost by 15 to 25 percent. Recognizing energy losses in steam systems involves I 1. Steam lost through defective valves...

Rivers, N.; Mandzuk, N.

468

Risk Analysis and Adaptive Response Planning for Water Distribution Systems Contamination Emergency Management  

E-Print Network [OSTI]

are investigated. Pressure-driven hydraulic analysis is performed to simulate the complicated system hydraulics under pressure-deficit conditions. Performance of a novel preventive response action ? injection of food-grade dye directly into drinking water...

Rasekh, Amin

2012-10-19T23:59:59.000Z

469

SARA (System ARchitects Apprentice): Modeling, analysis, and simulation support for design of concurrent systems  

SciTech Connect (OSTI)

An environment to support designers in the modeling, analysis and simulation of concurrent systems is described. It is shown how a fully nested structure model supports multilevel design and focuses attention on the interfaces between the modules which serve to encapsulate behavior. Using simple examples the paper indicates how a formal graph model can be used to model behavior in three domains: control flow, data flow, and interpretation. The effectiveness of the explicity environment model in SARA is discussed and the capability to analyze correctness and evaluate performance of a system model are demonstrated. A description of the integral help designed into SARA shows how the designer can be offered consistent use of any new tool introduced to support the design process.

Estrin, G.; Fenchel, R.S.; Razouk, R.R.; Vernon, M.K.

1986-02-01T23:59:59.000Z

470

Reliability Improvement Programs in Steam Distribution and Power Generation Systems  

E-Print Network [OSTI]

improvements in the reliability and efficiency of the system. Recent studies have shown that more than 40% of all in stalled steam traps and 20% of certain types of valves n~ed ' some form of corrective action. The majority of all high backpressure... problems in condensate return systems are due to poor design criteria in expanding or retrofitting existing return systems. By instituting a maintenance management program,a 95% reliability can be gained with two to four annual maintenance cyc...

Atlas, R. D.

471

Alternative Export - Wheat Distribution Systems for the Texas - Oklahoma Panhandle.  

E-Print Network [OSTI]

of wheat to Texas ports (referred Thermal Units of energy). The most energy efficient to as the 50-, Ba-car system); and system is the 80-car-train organization which con- 3) a system of m r unit trains %rating from sumes approximately 292 billion BTU... Contents ... SUMMARY ............................................... 2 Export Demand of Study-Area Wheat by Port Area.. ................................. INTRODUCTION.. ....................................... 3 RESULTS OF ANALYSIS.. SOUTH PLAINS...

Fuller, Stephen W.; Shanmugham C.V.

1980-01-01T23:59:59.000Z

472

automated distribution system: Topics by E-print Network  

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

Ioannou A, utomatic is todesign and test avehicle control system in order toachieve full vehicle automation in the longitudinal vehicle following isan important feature of a fully...

473

Robust Energy Cost Optimization of Water Distribution System with ...  

E-Print Network [OSTI]

SOCRATES: a system for scheduling hydroelectric generation under un- certainty, Ann. of Operations Res. , 59, (1995), 99-134. [18] G. Jolland., G. Cohen

2011-02-21T23:59:59.000Z

474

Commercial thermal distribution systems, Final report for CIEE/CEC  

E-Print Network [OSTI]

another Building? Cooling Capacity SUPPLY-AIR SYSTEM CoolingMODE. During cooling operation, the supply temperature swingafter the cooling coil), the supply air temperature rise may

Xu, T.

2011-01-01T23:59:59.000Z

475

The design and implementation of a distributed hierarchy for overcurrent protection and monitoring of a power distribution system  

E-Print Network [OSTI]

which provides coordinated control of each of the Overcurrent Relays within a substation. The third level consists of an Engineering Computer Facility which provides engineering support and coordinated control of all the Remote Terminal Units... be made locally. Since most distribution substations are unmanned, this requires a special service trip by a meter reading crew. Thus, this information is not immediately available to system operators who must constantly determine the most efficient...

Zeigler, John Charles

1984-01-01T23:59:59.000Z

476

Unified system for processing real and simulated data in the ATLAS experiment  

E-Print Network [OSTI]

The physics goals of the next Large Hadron Collider run include high precision tests of the Standard Model and searches for new physics. These goals at the Gates of Nature require detailed comparison of data with computational models simulating the expected data behavior. To highlight the role which modeling and simulation plays in future scientific discovery, we report on use cases and experience with a unified system built to process both real and simulated data of growing volume and variety.

The ATLAS collaboration

2015-01-01T23:59:59.000Z

477

The integration of renewable energy sources into electric power distribution systems. Volume 2, Utility case assessments  

SciTech Connect (OSTI)

Electric utility distribution system impacts associated with the integration of renewable energy sources such as photovoltaics (PV) and wind turbines (WT) are considered in this project. The impacts are expected to vary from site to site according to the following characteristics: (1) The local solar insolation and/or wind characteristics; (2) renewable energy source penetration level; (3) whether battery or other energy storage systems are applied; and (4) local utility distribution design standards and planning practices. Small, distributed renewable energy sources are connected to the utility distribution system like other, similar kW- and MW-scale equipment and loads. Residential applications are expected to be connected to single-phase 120/240-V secondaries. Larger kw-scale applications may be connected to three-phase secondaries, and larger hundred-kW and MW-scale applications, such as MW-scale windfarms or PV plants, may be connected to electric utility primary systems via customer-owned primary and secondary collection systems. Small, distributed renewable energy sources installed on utility distribution systems will also produce nonsite-specific utility generation system benefits such as energy and capacity displacement benefits, in addition to the local site-specific distribution system benefits. Although generation system benefits are not site-specific, they are utility-specific, and they vary significantly among utilities in different regions. In addition, transmission system benefits, environmental benefits and other benefits may apply. These benefits also vary significantly among utilities and regions. Seven utility case studies considering PV, WT, and battery storage were conducted to identify a range of potential renewable energy source distribution system applications.

Zaininger, H.W.; Ellis, P.R.; Schaefer, J.C. [Zaininger Engineering Co., San Jose, CA (United States)

1994-06-01T23:59:59.000Z

478

Algorithm and simulation development in support of response strategies for contamination events in air and water systems.  

SciTech Connect (OSTI)

Chemical/Biological/Radiological (CBR) contamination events pose a considerable threat to our nation's infrastructure, especially in large internal facilities, external flows, and water distribution systems. Because physical security can only be enforced to a limited degree, deployment of early warning systems is being considered. However to achieve reliable and efficient functionality, several complex questions must be answered: (1) where should sensors be placed, (2) how can sparse sensor information be efficiently used to determine the location of the original intrusion, (3) what are the model and data uncertainties, (4) how should these uncertainties be handled, and (5) how can our algorithms and forward simulations be sufficiently improved to achieve real time performance? This report presents the results of a three year algorithmic and application development to support the identification, mitigation, and risk assessment of CBR contamination events. The main thrust of this investigation was to develop (1) computationally efficient algorithms for strategically placing sensors, (2) identification process of contamination events by using sparse observations, (3) characterization of uncertainty through developing accurate demands forecasts and through investigating uncertain simulation model parameters, (4) risk assessment capabilities, and (5) reduced order modeling methods. The development effort was focused on water distribution systems, large internal facilities, and outdoor areas.

Waanders, Bart Van Bloemen

2006-01-01T23:59:59.000Z

479

The global distribution of large subaerial distributary fluvial systems  

E-Print Network [OSTI]

to the area of the upstream drainage basin, but is related to the size of the downstream basin. This sample of systems occurs in a variety of climates and in two different geologic settings - foreland basins and half graben. The rivers on all systems...

Gwynn, David Wilkinson

2002-01-01T23:59:59.000Z

480

A Smart Energy System with Distributed Access Control  

E-Print Network [OSTI]

systems to date support remote control and automation but not access control, making them applicable to HVAC (heating, ventilation, and air conditioning) systems. SE has the potential of significantly access from a remote site over the Internet, in which case access control in the form of a shared key

Shinozuka, Masanobu

Note: This page contains sample records for the topic "distribution system simulation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Computational simulations of latent heat thermal energy storage systems - with innovative and first-principles based simulation for the underlying unsteady melting (and solidification) processes.  

E-Print Network [OSTI]

?? This thesis develops an effective modeling and simulation procedure for a specific thermal energy storage system commonly used and recommended for various applications (such (more)

Gumaste, Rohan Achyut

2011-01-01T23:59:59.000Z

482

Optimization of Comminution Circuit Throughput and Product Size Distribution by Simulation and Control  

SciTech Connect (OSTI)

The goal of this project is to improve energy efficiency of industrial crushing and grinding operations (comminution). Mathematical models of the comminution process are being used to study methods for optimizing the product size distribution, so that the amount of excessively fine material produced can be minimized. The goal is to save energy by reducing the amount of material that is ground below the target size, while simultaneously reducing the quantity of materials wasted as ''slimes'' that are too fine to be useful. This is being accomplished by mathematical modeling of the grinding circuits to determine how to correct this problem. The approaches taken included (1) Modeling of the circuit to determine process bottlenecks that restrict flow rates in one area while forcing other parts of the circuit to overgrind the material; (2) Modeling of hydrocyclones to determine the mechanisms responsible for retaining fine, high-density particles in the circuit until they are overground, and improving existing models to accurately account for this behavior; and (3) Evaluation of advanced technologies to improve comminution efficiency and produce sharper product size distributions with less overgrinding.

S. K. Kawatra; T. C. Eisele; T. Weldum; D. Larsen; R. Mariani; J. Pletka

2005-03-31T23:59:59.000Z

483

OPTIMIZATION OF COMMINUTION CIRCUIT THROUGHPUT AND PRODUCT SIZE DISTRIBUTION BY SIMULATION AND CONTROL  

SciTech Connect (OSTI)

The goal of this project is to improve energy efficiency of industrial crushing and grinding operations (comminution). Mathematical models of the comminution process are being used to study methods for optimizing the product size distribution, so that the amount of excessively fine material produced can be minimized. The goal is to save energy by reducing the amount of material that is ground below the target size, while simultaneously reducing the quantity of materials wasted as ''slimes'' that are too fine to be useful. This is being accomplished by mathematical modeling of the grinding circuits to determine how to correct this problem. The approaches taken included (1) Modeling of the circuit to determine process bottlenecks that restrict flowrates in one area while forcing other parts of the circuit to overgrind the material; (2) Modeling of hydrocyclones to determine the mechanisms responsible for retaining fine, high-density particles in the circuit until they are overground, and improving existing models to accurately account for this behavior; and (3) Evaluation of advanced technologies to improve comminution efficiency and produce sharper product size distributions with less overgrinding.

S.K. Kawatra; T.C. Eisele; T. Weldum; D. Larsen; R. Mariani; J. Pletka

2005-01-01T23:59:59.000Z

484

A BiCriteria Scheduling Heuristics for Distributed Embedded Systems under Reliability and RealTime Constraints  

E-Print Network [OSTI]

A BiCriteria Scheduling Heuristics for Distributed Embedded Systems under Reliability and Real are met. Keywords: Distributed realtime systems, safetycritical systems, reliability, multitime distributed systems in the literature do not attempt to introduce reliability; rather, they concentrate

Girault, Alain

485

A Bi-Criteria Scheduling Heuristics for Distributed Embedded Systems under Reliability and Real-Time Constraints  

E-Print Network [OSTI]

A Bi-Criteria Scheduling Heuristics for Distributed Embedded Systems under Reliability and Real are met. Keywords: Distributed real-time systems, safety-critical systems, reliability, multi-time distributed systems in the literature do not attempt to introduce reliability; rather, they concentrate

Girault, Alain

486

Fusion barrier distributions in systems with finite excitation energy  

E-Print Network [OSTI]

Eigen-channel approach to heavy-ion fusion reactions is exact only when the excitation energy of the intrinsic motion is zero. In order to take into account effects of finite excitation energy, we introduce an energy dependence to weight factors in the eigen-channel approximation. Using two channel problem, we show that the weight factors are slowly changing functions of incident energy. This suggests that the concept of the fusion barrier distribution still holds to a good approximation even when the excitation energy of the intrinsic motion is finite. A transition to the adiabatic tunneling, where the coupling leads to a static potential renormalization, is also discussed.

K. Hagino; N. Takigawa; A. B. Balantekin

1997-06-24T23:59:59.000Z

487

Distributed Generation System Characteristics and Costs in the Buildings Sector  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed Newcatalyst phasesDataTranslocation oftheAmperometricEnergy AnalysisDistributed

488

Workload Decomposition for Particle Simulation Applications on Hierarchical Distributed-Shared Memory  

E-Print Network [OSTI]

for High Performance Computing. Bus-based shared memory multiprocessor systems (SMPs) are rapidly spreading-bandwidth interconnection network, are increasingly established and used to provide high performance computing at a low cost

Vlad, Gregorio

489

RIS-M-2271 DESCRIPTION OF A SIMULATION SYSTEM DYSIM FOR CONTINUOUS  

E-Print Network [OSTI]

;FORTRAN; NUCLEAR POWER PLANTS; STEADY-STATE CONDITIONS; TRANSIENTS UDC 621.039.5 : 681.3.06 January 1981 Risø for simulation of nuclear reactors and plant com- ponents. Several minor modifications have been done to adaptRIS?-M-2271 DESCRIPTION OF A SIMULATION SYSTEM DYSIM FOR CONTINUOUS DYNAMIC PROCESSES P. la Cour

490

Artificial Sand Pictures -A Complex Systems Simulation Brad Pearce and Ken Hawick  

E-Print Network [OSTI]

Artificial Sand Pictures - A Complex Systems Simulation Brad Pearce and Ken Hawick Computer Science and layering in materials science. We con- struct a lattice-based simulation of a sand picture based around scheme is used to update pairs of neighboring cells using a Boltzmann like energy controlled probability

Hawick, Ken

491

Fine-grained Simulation in the Design of Automotive Communication Systems  

E-Print Network [OSTI]

Fine-grained Simulation in the Design of Automotive Communication Systems Aurélien Monot1 and di- mensioning automotive embedded networks are worst-case schedulability analysis and simulation architectures in the automotive domain are defined years in advance and their real- time properties need

Paris-Sud XI, Université de

492

A CRITICAL REVIEW OF SIMULATION TECHNIQUES FOR DAYLIGHT RESPONSIVE SYSTEMS  

E-Print Network [OSTI]

* corresponding author Application of lighting control technologies has increased the public interest. Although these technologies have been promoted during the last years their successful use in buildings has been accomplished in a small percentage of new projects. One reason is the difficulty in quantifying the energy savings and thus the subsequent payback period. The majority of existing simulation tools (which are embedded in building energy codes) needed during initial design- are based on the estimation of the potential energy savings due to daylight. The paper focus on the limitations of current simulation approaches comparing their results, in order to assess their accuracy. For this, special test cases have been developed exploiting their domain of validity.

L. Doulos; A. Tsangrassoulis; F. Topalis

493

Integrating Solar Thermal and Photovoltaic Systems in Whole Building Energy Simulation  

E-Print Network [OSTI]

to achieve further energy consumption reductions. To accomplish this, the F- Chart program was used for the solar thermal system analysis and the PV F-Chart program for the solar photovoltaic (PV) system analysis. Authors show how DOE-2.1e simulation... Time series plots of space heating and service hot water loads from SYSTEMS and PLANT simulation runs Due to the fact that the solar thermal systems analysis program, F-Chart, takes into account the system efficiencies in its loads calculation...

Cho, S.; Haberl, J.

494

Technical Challenges of Plug-In Hybrid Electric Vehicles and Impacts to the US Power System: Distribution System Analysis  

SciTech Connect (OSTI)

This report documents work conducted by Pacific Northwest National Laboratory (PNNL) for the Department of Energy (DOE) to address three basic questions concerning how typical existing electrical distribution systems would be impacted by the addition of PHEVs to residential loads.

Gerkensmeyer, Clint; Kintner-Meyer, Michael CW; DeSteese, John G.

2010-01-01T23:59:59.000Z

495

Topic 1: Basics of Power Systems A.H. MohsenianRad (U of T) 1Networking and Distributed Systems  

E-Print Network [OSTI]

) Transmission Lines Several Hundred Miles Switching Stations Transformers Circuit Breakers #12;Power Systems Grid 7 · Power Distribution: Medium Voltage (MV) Transmission Lines ( in Smart Grid 11 Nodes: Buses Links: Transmission Lines Generator Load #12;Power Grid Graph Representation

Mohsenian-Rad, Hamed

496

Co-simulation of innovative integrated HVAC systems in buildings  

E-Print Network [OSTI]

Developing an Integrated Building Design Tool by Couplingdesign energy ecient building systems in this complex setting, integrated

Trcka, Marija

2010-01-01T23:59:59.000Z

497

A High Energy Electron and Photon Detector Simulation System  

E-Print Network [OSTI]

A detailed Monte-Carlo code has been developed from basic principles that simulates almost all of the basic photon and charged particle interactions. The code is used to derive the response functions of a high energy photon detector to incident beams of photons of various energies. The detector response matrices (DRMs) are calculated using this code. Deconvolution of an artificially generated spectrum is presented.

Srikanta Sinha

2008-10-02T23:59:59.000Z

498

Global Evaluation of the ISBA-TRIP Continental Hydrological System. Part II: Uncertainties in River Routing Simulation Related to Flow  

E-Print Network [OSTI]

the entire globe. RRMs have been introduced into earth system models (ESMs) to convert the runoff simulated

Boyer, Edmond

499

Distribution System Analysis Tools for Studying High Penetration of PV  

E-Print Network [OSTI]

;Acknowledgements This is the final report for the Power Systems Engineering Research Center (PSERC) research also like to convey special acknowledgement to the PSERC member companies who provided direct

500

Water Distribution and Wastewater Systems Operators (North Dakota)  

Broader source: Energy.gov [DOE]

All public water supply and wastewater disposal systems are subject to classification and regulation by the State of North Dakota, and must obtain certification from the State Department of Health.