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Note: This page contains sample records for the topic "improve grid performance" from the National Library of EnergyBeta (NLEBeta).
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1

Smart Grid Projects Are Improving Performance and Helping Consumers...  

Office of Environmental Management (EM)

Smart Grid Projects Are Improving Performance and Helping Consumers Better Manage their Energy Use Smart Grid Projects Are Improving Performance and Helping Consumers Better Manage...

2

Smart Grid Investments Improve Grid Reliability, Resilience,...  

Energy Savers [EERE]

Investments Improve Grid Reliability, Resilience, and Storm Responses (November 2014) Smart Grid Investments Improve Grid Reliability, Resilience, and Storm Responses (November...

3

Smart Grid Projects Are Improving Performance and Helping Consumers...  

Energy Savers [EERE]

losses, peak demand, and customer bills by adjusting voltage levels along local power lines. Remotely accessible smart meters reduce operating costs, improve outage management...

4

Now Available: Smart Grid Investments Improve Grid Reliability...  

Energy Savers [EERE]

Smart Grid Investments Improve Grid Reliability, Resilience, and Storm Responses (November 2014) Now Available: Smart Grid Investments Improve Grid Reliability, Resilience, and...

5

Smart Grid Projects Are Improving Performance and Helping Consumers Better Manage their Energy Use  

Broader source: Energy.gov [DOE]

After nearly five years, the 131 smart grid projects funded through the 2009 Recovery Act are nearing completion and the results are significant. Smart grid applications are producing meaningful benefits for grid operators and customers alike

6

Performance Improvement of Smart Grid Communications Using Multi-homing and Multi-streaming SCTP .  

E-Print Network [OSTI]

??With the obvious evolution and acceleration of smart grid, it is crucial for its success to rely on a solid transmission protocol among its peripherals… (more)

Alowaidi, Majed

2012-01-01T23:59:59.000Z

7

Coming Full Circle in Florida: Improving Electric Grid Reliability and  

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

Coming Full Circle in Florida: Improving Electric Grid Reliability Coming Full Circle in Florida: Improving Electric Grid Reliability and Resiliency Coming Full Circle in Florida: Improving Electric Grid Reliability and Resiliency May 2, 2013 - 11:16am Addthis Inside Florida Power & Light's Transmission Performance Diagnostic Center. | Photo courtesy of Florida Power & Light. Inside Florida Power & Light's Transmission Performance Diagnostic Center. | Photo courtesy of Florida Power & Light. In 2009, at the DeSoto Next Generation Solar Energy Center, President Obama announced the launch of the $3.4 billion Smart Grid Investment Grant program. In 2009, at the DeSoto Next Generation Solar Energy Center, President Obama announced the launch of the $3.4 billion Smart Grid Investment Grant program. Inside Florida Power & Light's Transmission Performance Diagnostic Center. | Photo courtesy of Florida Power & Light.

8

Municipal Utilities' Investment in Smart Grid Technologies Improves...  

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

Municipal Utilities' Investment in Smart Grid Technologies Improves Services and Lowers Costs Municipal Utilities' Investment in Smart Grid Technologies Improves Services and...

9

High-Performance Computing for Advanced Smart Grid Applications  

SciTech Connect (OSTI)

The power grid is becoming far more complex as a result of the grid evolution meeting an information revolution. Due to the penetration of smart grid technologies, the grid is evolving as an unprecedented speed and the information infrastructure is fundamentally improved with a large number of smart meters and sensors that produce several orders of magnitude larger amounts of data. How to pull data in, perform analysis, and put information out in a real-time manner is a fundamental challenge in smart grid operation and planning. The future power grid requires high performance computing to be one of the foundational technologies in developing the algorithms and tools for the significantly increased complexity. New techniques and computational capabilities are required to meet the demands for higher reliability and better asset utilization, including advanced algorithms and computing hardware for large-scale modeling, simulation, and analysis. This chapter summarizes the computational challenges in smart grid and the need for high performance computing, and present examples of how high performance computing might be used for future smart grid operation and planning.

Huang, Zhenyu; Chen, Yousu

2012-07-06T23:59:59.000Z

10

Smart Grid Investments Improve Grid Reliability, Resilience, and Storm Responses (November 2014)  

Broader source: Energy.gov [DOE]

Smart grid technologies are helping utilities to speed outage restoration following major storm events, reduce the total number of affected customers, and improve overall service reliability to reduce customer losses from power disruptions. This report presents findings on smart grid improvements in outage management from OE's Smart Grid Investment Grant (SGIG) program, based on the recent experiences of three SGIG projects.

11

Now Available: Smart Grid Investments Improve Grid Reliability, Resilience, and Storm Responses (November 2014)  

Broader source: Energy.gov [DOE]

A new report from OE's Smart Grid Investment Grant (SGIG) program presents findings on smart grid improvements in outage management, based on the recent experiences of three SGIG projects.

12

An improved grid security infrastructure by trusted computing  

Science Journals Connector (OSTI)

Current delegation mechanism of grid security infrastructure (GSI) can't satisfy the requirement of dynamic, distributed and practical security in grid virtual organization. To improve this situation, ... treated...

Yan Fei; Zhang Huanguo; Sun Qi; Shen Zhidong…

2006-11-01T23:59:59.000Z

13

The GridPACK™ toolkit for developing power grid simulations on high performance computing platforms  

Science Journals Connector (OSTI)

This paper describes the GridPACK™ framework, which is designed to help power grid engineers develop modeling software capable of running on high performance computers. The framework contains modules for setting up distributed power grid networks, ... Keywords: electric power grid, high performance computing, software frameworks

Bruce Palmer; William Perkins; Kevin Glass; Yousu Chen; Shuangshuang Jin; David Callahan

2013-11-01T23:59:59.000Z

14

Grid Security and Integration with Minimal Performance Degradation Sugata Sanyal  

E-Print Network [OSTI]

Grid Security and Integration with Minimal Performance Degradation Sugata Sanyal School of computational grids becoming a reality. However, the question of grid security remains one of the important open research issues. Here, we present some novel ideas about how to implement grid security, without

Sanyal, Sugata

15

Performance testing framework for smart grid communication network  

Science Journals Connector (OSTI)

Smart grid communication network is comprised of different communication mediums and technologies. Performance evaluation is one of the main concerns in smart grid communication system. In any smart grid communication implementation, to determine the performance factor of the network, a testing of an end-to-end process flow is required. Therefore, an effective and coordinated testing procedure plays a crucial role in evaluating the performance of smart grid communications. In this paper, a testing framework is proposed as a guideline to analyze and assess the performance of smart grid communication network.

D N Quang; O H See; L L Chee; C Y Xuen; S Karuppiah

2013-01-01T23:59:59.000Z

16

Proposed platform for improving grid security by trust management system  

E-Print Network [OSTI]

With increasing the applications of grid system, the risk in security field is enhancing too. Recently Trust management system has been recognized as a noticeable approach in enhancing of security in grid systems. In this article due to improve the grid security a new trust management system with two levels is proposed. The benefits of this platform are adding new domain in grid system, selecting one service provider which has closest adaption with user requests and using from domains security attribute as an important factor in computing the trust value.

Siadat, Safieh; Mohsenzadeh, Mehran

2009-01-01T23:59:59.000Z

17

Improving Grid Services Security with Fine Grain Policies  

Science Journals Connector (OSTI)

Grid computing is a continuously growing research field ... of resources among untrusted entities poses non trivial security problems. This paper proposes an approach to improve the security of computational serv...

Fabrizio Baiardi; Fabio Martinelli…

2004-01-01T23:59:59.000Z

18

Building the TeraGrid  

Science Journals Connector (OSTI)

...improved service. (a) Security in a Grid environment Keeping computer...optical networking, Grid software compatibility, security and the performance of...users to manipulate their security credentials. Coordinated Grid middleware. The TeraGrid...

2005-01-01T23:59:59.000Z

19

Performance Analysis of Data Processing Architectures for the Smart Grid  

E-Print Network [OSTI]

Infrastructure (AMI) - a system that measures, collects and analyzes data about energy usage [2]. An estimate, decentralized, distributed and hybrid) for hierarchical power distribution networks; (ii) we 1 http://www.grid4Performance Analysis of Data Processing Architectures for the Smart Grid Akshay Uttama Nambi S. N

Kuzmanov, Georgi

20

Grid Security and Integration with Minimal Performance Degradation  

E-Print Network [OSTI]

Computational grids are believed to be the ultimate framework to meet the growing computational needs of the scientific community. Here, the processing power of geographically distributed resources working under different ownerships, having their own access policy, cost structure and the likes, is logically coupled to make them perform as a unified resource. The continuous increase of availability of high-bandwidth communication as well as powerful computers built of low-cost components further enhance chances of computational grids becoming a reality. However, the question of grid security remains one of the important open research issues. Here, we present some novel ideas about how to implement grid security, without appreciable performance degradation in grids. A suitable alternative to the computationally expensive encryption is suggested, which uses a key for message authentication. Methods of secure transfer and exchange of the required key(s) are also discussed.

Sanyal, Sugata; Abraham, Ajith; Paprzycki, Marcin

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

GridPACK Toolkit for Developing Power Grid Simulations on High Performance Computing Platforms  

SciTech Connect (OSTI)

This paper describes the GridPACK™ framework, which is designed to help power grid engineers develop modeling software capable of running on todays high performance computers. The framework contains modules for setting up distributed power grid networks, assigning buses and branches with arbitrary behaviors to the network, creating distributed matrices and vectors, using parallel linear and non-linear solvers to solve algebraic equations, and mapping functionality to create matrices and vectors based on properties of the network. In addition, the framework contains additional functionality to support IO and to manage errors.

Palmer, Bruce J.; Perkins, William A.; Glass, Kevin A.; Chen, Yousu; Jin, Shuangshuang; Callahan, Charles D.

2013-11-30T23:59:59.000Z

22

Interim Test Procedures for Evaluating Electrical Performance and Grid Integration of Vehicle-to-Grid Applications  

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

Interim Test Procedures for Interim Test Procedures for Evaluating Electrical Performance and Grid Integration of Vehicle-to-Grid Applications S. Chakraborty, W. Kramer, B. Kroposki, G. Martin, P. McNutt, M. Kuss, T. Markel, and A. Hoke Technical Report NREL/TP-5500-51001 June 2011 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308 Interim Test Procedures for Evaluating Electrical Performance and Grid Integration of Vehicle-to-Grid Applications S. Chakraborty, W. Kramer, B. Kroposki, G. Martin, P. McNutt, M. Kuss, T. Markel,

23

Improving Deaerator Performance  

E-Print Network [OSTI]

The objectives of deaeration of feedwater are reviewed. A discussion of appropriate test data and methods for assessing deaerator performance are given. Analysis procedures are developed to analyze the test data. Typical problems such as over...

Dyer, D. F.; Maples, G.

24

Wavelet technique based islanding detection and improved repetitive current control for reliable operation of grid-connected PV systems  

Science Journals Connector (OSTI)

Abstract Recent years have witnessed a thrust towards the use of solar energy as the major renewable energy source for distributed power generation. The proposed system requires reliable detection technique and suitable current control strategy for proper operation. This paper focuses on plug-in repetitive current (RC) control strategy for grid connected inverter system and wavelet technique for electrical grid status identification. The performance of proposed current control technique employed for grid connected inverter system under distorted and unbalanced grid voltage is compared with the existing conventional methods like PI and PR controller. This controller uses the feedback control system for attenuating periodic disturbances, improving high quality sinusoidal output current and high power factor. The proposed scheme employs fourth order infinite impulse response (IIR) filter for maintaining its resonance frequency, output frequency matching with grid fundamental frequency and reduction of harmonics. The DC-DC boost converter implements incremental conductance based (INC) maximum power point tracker (MPPT) algorithm. The effects of LCL filter for improving disturbance rejection capability and dynamic performance of the proposed system is also demonstrated. Grid connected PV inverter employs wavelet technique for an islanding detection functionality in order to determine the status of the electrical grid. In order to show the effectiveness of the proposed algorithm, modeling and simulation for grid connected PV system is performed using MATLAB/SIMULINK and its PowerSim toolbox.

Smitha Joyce Pinto; Gayadhar Panda

2015-01-01T23:59:59.000Z

25

High-Performance Computing for Real-Time Grid Analysis and Operation  

SciTech Connect (OSTI)

Power grids worldwide are undergoing an unprecedented transition as a result of grid evolution meeting information revolution. The grid evolution is largely driven by the desire for green energy. Emerging grid technologies such as renewable generation, smart loads, plug-in hybrid vehicles, and distributed generation provide opportunities to generate energy from green sources and to manage energy use for better system efficiency. With utility companies actively deploying these technologies, a high level of penetration of these new technologies is expected in the next 5-10 years, bringing in a level of intermittency, uncertainties, and complexity that the grid did not see nor design for. On the other hand, the information infrastructure in the power grid is being revolutionized with large-scale deployment of sensors and meters in both the transmission and distribution networks. The future grid will have two-way flows of both electrons and information. The challenge is how to take advantage of the information revolution: pull the large amount of data in, process it in real time, and put information out to manage grid evolution. Without addressing this challenge, the opportunities in grid evolution will remain unfulfilled. This transition poses grand challenges in grid modeling, simulation, and information presentation. The computational complexity of underlying power grid modeling and simulation will significantly increase in the next decade due to an increased model size and a decreased time window allowed to compute model solutions. High-performance computing is essential to enable this transition. The essential technical barrier is to vastly increase the computational speed so operation response time can be reduced from minutes to seconds and sub-seconds. The speed at which key functions such as state estimation and contingency analysis are conducted (typically every 3-5 minutes) needs to be dramatically increased so that the analysis of contingencies is both comprehensive and real time. An even bigger challenge is how to incorporate dynamic information into real-time grid operation. Today’s online grid operation is based on a static grid model and can only provide a static snapshot of current system operation status, while dynamic analysis is conducted offline because of low computational efficiency. The offline analysis uses a worst-case scenario to determine transmission limits, resulting in under-utilization of grid assets. This conservative approach does not necessarily lead to reliability. Many times, actual power grid scenarios are not studied, and they will push the grid over the edge and resulting in outages and blackouts. This chapter addresses the HPC needs in power grid analysis and operations. Example applications such as state estimation and contingency analysis are given to demonstrate the value of HPC in power grid applications. Future research directions are suggested for high performance computing applications in power grids to improve the transparency, efficiency, and reliability of power grids.

Huang, Zhenyu; Chen, Yousu; Chavarría-Miranda, Daniel

2013-10-31T23:59:59.000Z

26

Energy Department Invests Over $10 Million to Improve Grid Reliability...  

Office of Environmental Management (EM)

day-to-day grid reliability. "Through advanced sensors and monitoring devices, U.S. utilities now have unprecedented insight into the power grid - helping industry make decisions...

27

Municipal Utilities' Investment in Smart Grid Technologies Improves Services and Lowers Costs  

Broader source: Energy.gov [DOE]

OE has released a new Smart Grid report describing the activities of three municipal utilities that received funding through the Recovery Act Smart Grid Investment Grant program. "Municipal Utilities' Investment in Smart Grid Technologies Improves Services and Lowers Costs" reports on the benefits of the cities' investments, including improved operating efficiencies, lower costs, shorter outages, and reduced peak demands and electricity consumption.

28

Ironstack: Performance, Stability and Security for Power Grid Data Networks  

Science Journals Connector (OSTI)

Operators of the nationwide power grid use proprietary data networks to monitor and manage their power distribution systems. These purpose-built, wide area communication networks connect a complex array of equipment ranging from PMUs and synchrophasers ... Keywords: software-defined networking, SDNs, network performance, high-assurance computing, security

Zhiyuan Teo, Vera Kutsenko, Ken Birman, Robbert Van Renesse

2014-06-01T23:59:59.000Z

29

Improving the Reliability and Resiliency of the US Electric Grid: SGIG  

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

Improving the Reliability and Resiliency of the US Electric Grid: Improving the Reliability and Resiliency of the US Electric Grid: SGIG Article in Metering International, March 2012 Improving the Reliability and Resiliency of the US Electric Grid: SGIG Article in Metering International, March 2012 The quarterly magazine Metering International is a resource for information on trends and developments in the industry. Issue 1 2012 (March) featured an article on DOE's Smart Grid Investment Grant Program written by OE's Debbie Haught and Joseph Paladino. "Improving the Reliability and Resiliency of the US Electric Grid" is available for download below. Improving the Reliability and Resiliency of the US Electric Grid - SGIG Article in Metering International Issue 1 2012.pdf More Documents & Publications Smart Grid Investment Grant Program - Progress Report (October 2013)

30

Nanolubricants to Improve Chiller Performance  

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

Nanolubricants to Improve Chiller Nanolubricants to Improve Chiller Performance Mark Kedzierski NIST MAK@NIST.GOV 301 975 5282 April 3, 2013 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: Enabling technology for improving the efficiency of chillers that cool large buildings with nanolubricants. (Nanolubricants are not currently used in chillers.) Develop fundamental understanding of how nanolubricants enhance refrigerant/nanolubricant. What nanoparticle size,

31

An Improved AMG-based Method for Fast Power Grid Analysis Cheng Zhuo, Jiang Hu1  

E-Print Network [OSTI]

An Improved AMG-based Method for Fast Power Grid Analysis Cheng Zhuo, Jiang Hu1 and Kangsheng Chen and verification. Meanwhile, the huge size of power grid requires its analysis to be fast and highly scalable. Algebraic multigrid (AMG) has been recognized as a promising approach for fast power grid analysis. We

Hu, Jiang

32

Energy Department Invests Over $10 Million to Improve Grid Reliability and Resiliency  

Broader source: Energy.gov [DOE]

As part of the Obama Administration’s commitment to a strong and secure power grid, the Energy Department today announced more than $10 million for projects that will improve the reliability and resiliency of the U.S. electric grid and facilitate quick and effective response to grid conditions.

33

Advancing Visibility of Grid Operations to Improve Reliability  

Broader source: Energy.gov [DOE]

Synchrophasors are starting a revolution, enabling a level of observation and control never envisioned when the grid was designed. Real-time awareness of the grid’s operating conditions helps to enhance reliability and assists in integrating clean energy technologies.

34

Fault Tolerant High Performance Information Services for Dynamic Collections of Grid and Web Services  

E-Print Network [OSTI]

of collaboration. An infrastructure for the Semantic Grid is discussed in [2] where Grid Processes may be definedFault Tolerant High Performance Information Services for Dynamic Collections of Grid and Web Services Mehmet S. Aktas1, 2, Geoffrey C. Fox1, 2, 3 , Marlon Pierce1 1 Community Grids Laboratory, Indiana

35

High-Performance Distributed Solar Computing (?) ---Towards a Grid that Computes like Trees---  

E-Print Network [OSTI]

High-Performance Distributed Solar Computing (?) --- Towards a Grid that Computes like Trees--- (Satoshi Matsuoka) matsu@is.titech.ac.jp Abstract Power-heat dissipation as well as the associated CO2 grid, and involve very little effect or merit from grid computing, we actually claim that grids

36

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

SciTech Connect (OSTI)

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

Chen, Yousu; Huang, Zhenyu

2014-08-31T23:59:59.000Z

37

Performance Comparison of Some Hybrid Deadline Based Scheduling Algorithms for Computational Grid  

Science Journals Connector (OSTI)

Grid computing is a form of distributed computing ... speed across dynamic and geographically distributed environment. Grid infrastructure plays a vital role in terms of ... computation in the performance call ce...

Haruna Ahmed Abba; Nordin B. Zakaria; Anindya J. Pal…

2012-01-01T23:59:59.000Z

38

Performance Evaluation of Multiuser Selection Scheme in HANs of Smart Grid  

Science Journals Connector (OSTI)

In Home Area Networks (HANs) of Smart Grid with the promising WiFi Direct technique, multiuser ... performance of multiuser selection scheme in HANs of Smart Grid is related with several factors, i.e...

Zhuo Li; Qilian Liang; Baoju Zhang…

2014-01-01T23:59:59.000Z

39

DOE Provides $4.3 Million to Improve Reliability of the U.S. Electric Grid  

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

Provides $4.3 Million to Improve Reliability of the U.S. Provides $4.3 Million to Improve Reliability of the U.S. Electric Grid DOE Provides $4.3 Million to Improve Reliability of the U.S. Electric Grid August 21, 2009 - 3:47pm Addthis Innovative Synchrophasor Research Will Provide Better Real-Time Information WASHINGTON, DC - The Department of Energy's Office of Electricity and Energy Reliability today announced that it will provide $4.3 million for four projects that will use innovative synchrophasor research to improve the reliability and efficiency of our Nation's electricity grid. These awards are part of the Department's efforts to modernize the electric grid and enhance the security and reliability of the energy infrastructure. Synchrophasors are high-speed, real-time synchronized measurement devices used to diagnose the health of the electricity grid. With synchrophasor

40

Improved vector control strategies of DFIG under Symmetrical Grid  

Science Journals Connector (OSTI)

The behavior of VSCF Doubly Fed Induction Generator (DFIG) during symmetrical grid fault is proposed in this chapter. The equivalent model of DFIG wind turbines in synchronous speed w1...coordinate system is give...

Li Na; Mu Xiu-chun; Song E-nuo

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

Performance Comparison of Security Mechanisms for Grid Services Satoshi Shirasuna Aleksander Slominski Liang Fang Dennis Gannon  

E-Print Network [OSTI]

Performance Comparison of Security Mechanisms for Grid Services Satoshi Shirasuna Aleksander Security is one of the most important features for Grid services. There are several specifications used, since most of the security mechanisms involve slow XML manipulations, adding secu- rity to Grid services

42

Improved Power Grid Stability and Efficiency with a Building-Energy Cyber-Physical System  

E-Print Network [OSTI]

, or for sporadic reasons, for example a power plant goes offline unexpectedly (e.g., due to an earthquake or stagnant winds to propel wind turbines). Dur- ing an episode, the power grid operators must contend1 Improved Power Grid Stability and Efficiency with a Building-Energy Cyber-Physical System Mary

43

Performance Parameters for Grid-Connected PV Systems  

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

National Renewable Energy Laboratory National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 * www.nrel.gov Operated for the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy by Midwest Research Institute * Battelle Contract No. DE-AC36-99-GO10337 B. Marion, J. Adelstein, and K. Boyle National Renewable Energy Laboratory H. Hayden, B. Hammond, T. Fletcher, B. Canada, and D. Narang Arizona Public Service Co. D. Shugar, H. Wenger, A. Kimber, and L. Mitchell PowerLight Corporation G. Rich and T. Townsend First Solar Prepared for the 31 st IEEE Photovoltaics Specialists Conference and Exhibition Lake Buena Vista, Florida January 3-7, 2005 February 2005 * NREL/CP-520-37358 Performance Parameters for Grid-Connected PV Systems

44

Efficiency and Reliability Improvement in Wind Turbine Converters by Grid Converter Adaptive Control  

E-Print Network [OSTI]

Efficiency and Reliability Improvement in Wind Turbine Converters by Grid Converter Adaptive stack shows efficiency increase in the high power region. Introduction Wind turbines are emerging energy test setup. Keywords >, Efficiency>>, >,

Munk-Nielsen, Stig

45

A TIME EFFICIENT ADAPTIVE GRIDDING APPROACH AND IMPROVED CALIBRATIONS IN  

E-Print Network [OSTI]

measurement times. Additionally, manu- al pitch and yaw calibration increases uncertainty. A new FHP pitch and yaw calibrator is designed and built to reduce the uncertainty of the measurements by precise and computer controlla- ble traversing system is implemented using an adaptive grid method for the refinement

Camci, Cengiz

46

Simulation of fluid displacement in porous media - improved methods to minimize numerical dispersion and grid orientation effects  

E-Print Network [OSTI]

in performance. Also, under these conditions, the calculated results are highly sen- sitive to grid orientation. '1 * Todd, et al. demonstrated the grid orientation effects for five-point finite difference reservoir simulators. They proposed a two... GRAPHICAL DESCRIPTION numerical dispersion and grid orientation effects. The difference in recovery performance for diagonal and parallel grids was not ap- preciable when finer grids were used, Coats, et al. simulated a five-spot steamflood...

Laprea-Bigott, Marcelo

1976-01-01T23:59:59.000Z

47

High performance x-ray anti-scatter grid  

DOE Patents [OSTI]

Disclosed are an x-ray anti-scatter grid for x-ray imaging, particularly for screening mammography, and method for fabricating same, x-rays incident along a direct path pass through a grid composed of a plurality of parallel or crossed openings, microchannels, grooves, or slots etched in a substrate, such as silicon, having the walls of the microchannels or slots coated with a high opacity material, such as gold, while x-rays incident at angels with respect to the slots of the grid, arising from scatter, are blocked. The thickness of the substrate is dependent on the specific application of the grid, whereby a substrate of the grid for mammography would be thinner than one for chest radiology. Instead of coating the walls of the slots, such could be filed with an appropriate liquid, such as mercury. 4 Figs.

Logan, C.M.

1995-05-23T23:59:59.000Z

48

Effect of wind generation system types on Micro-Grid (MG) fault performance during both standalone and grid connected modes  

Science Journals Connector (OSTI)

Abstract Recently, there are three wind generation (WG) system types. The first type is called Fixed Speed Wind Generation (FSWG) system, which employs squirrel cage induction generators. Double Fed Induction Generator (DFIG) is utilized in the second type. The third type is called Full Converter Wind Generation (FCWG) system, which is interfaced with Micro-Grid (MG) through a back to back converter. During fault occurrence, each WG has its performance and characteristics which are determined by the generator physical characteristics and the MG earthing system configuration. For some WG types, the fault current depends also on the control algorithm of the power converter. The main target of this paper is to investigate and estimate how the fault performance of MG during both standalone and grid-connected modes is influenced by the type of WG. It is found during standalone mode that the type of the employed WG has a dominant impact on the MG performance under fault disturbance. On the contrary, the type of the employed WG has a negligible effect on the MG fault performance during grid-connected mode. This is because the main grid contributes most of the fault current. Effects of earthing system type on MG performance are highlighted.

Rashad M. Kamel

2014-01-01T23:59:59.000Z

49

Sustaining Performance Improvements in Energy Intensive Industries  

E-Print Network [OSTI]

Experience has shown that significant opportunity for performance improvements exists in energy intensive operations. Often, efforts to improve efficiency focus on vendor-led initiatives to improve operations of particular equipment. This approach...

Moore, D. A.

2005-01-01T23:59:59.000Z

50

Improving pulverized coal plant performance  

SciTech Connect (OSTI)

A major deliverable of the U.S. Department of Energy (DOE) project ``Engineering Development of Advanced Coal-Fired Low-Emissions Boiler Systems`` (LEBS) is the design of a large, in this case 400 MWe, commercial generating unit (CGU) which will meet the Project objectives. The overall objective of the LEBS Project is to dramatically improve environmental performance of future pulverized coal fired power plants without adversely impacting efficiency or the cost of electricity. The DOE specified the use of near-term technologies, i.e., advanced technologies that partially developed, to reduce NO{sub x}, SO{sub 2} and particulate emissions to be substantially less than current NSPS limits. In addition, air toxics must be in compliance and waste must be reduced and made more disposable. The design being developed by the ABB Team is projected to meet all the contract objectives and to reduce emission of NO{sub x}, SO{sub 2} and particulates to one-fifth to one-tenth NSPS limits while increasing net station efficiency significantly and reducing the cost of electricity. This design and future work are described in the paper.

Regan, J.W.; Borio, R.W.; Palkes, M.; Mirolli, M. [ABB Combustion Engineering, Inc., Windsor, CT (United States); Wesnor, J.D. [ABB Environmental Systems, Birmingham, AL (United States); Bender, D.J. [Raytheon Engineers and Constructors, Inc., New York, NY (United States)

1995-12-31T23:59:59.000Z

51

Towards High Performance CORBA and MPI Middlewares for Grid Computing  

Science Journals Connector (OSTI)

Due to the high level of heterogeneity in a computational Grid, designing a runtime system for such computing infrastructure is extremely challenging, for example regarding the ability to exploit transparently and efficiently various networking technologies. ...

Alexandre Denis; Christian Pérez; Thierry Priol

2001-11-01T23:59:59.000Z

52

Interim Test Procedures for Evaluating Electrical Performance and Grid Integration of Vehicle-to-Grid Applications  

SciTech Connect (OSTI)

The objective of this report is to provide a test plan for V2G testing. The test plan is designed to test and evaluate the vehicle's power electronics capability to provide power to the grid, and to evaluate the vehicle's ability to connect and disconnect from the utility according to a subset of the IEEE Std. 1547 tests.

Chakraborty, S.; Kramer, W.; Kroposki, B.; Martin, G.; McNutt, P.; Kuss, M.; Markel, T.; Hoke, A.

2011-06-01T23:59:59.000Z

53

Performance evaluations of ZigBee in different smart grid environments  

Science Journals Connector (OSTI)

Recently, ZigBee Smart Energy profile has been developed for various smart grid applications, such as automatic metering, demand response, load control, power fraud detection, fault diagnostics, and distribution automation. In this paper, the performance ... Keywords: IEEE 802.15.4, Ns-2, Smart grid, Wireless sensor networks, ZigBee

B. E. Bilgin; V. C. Gungor

2012-05-01T23:59:59.000Z

54

Coming Full Circle in Florida: Improving Electric Grid Reliability...  

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

& Light's Transmission Performance Diagnostic Center. | Photo courtesy of Florida Power & Light. In 2009, at the DeSoto Next Generation Solar Energy Center, President Obama...

55

An improved framework for power grid vulnerability analysis considering critical system features  

Science Journals Connector (OSTI)

Abstract In recent years the rapid development of complex network theory has provided a new angle on the vulnerability analysis of a power grid. However, current analysis models are usually general ones that may ignore some specific features of power systems. In order to address the issue, this paper proposes an improved framework for the vulnerability analysis of power grids. Firstly, the traditional topology based graph model is improved by depicting a power grid as a weighted graph based on the reactance matrix. Secondly, the concept of load is redefined by using power angle information. Thirdly, the power flow constraints are adopted instead of the shortest path based flow scheme. Based on the proposed framework, an improved dynamic analysis model is developed. In addition, numerical simulations for both a general traditional model and the proposed model are investigated based on the IEEE 118-bus system respectively. The comparison demonstrates that the improved model is more effective and efficient for the vulnerability analysis of a power grid.

YuanYu Dai; Guo Chen; ZhaoYang Dong; YuSheng Xue; David J. Hill; Yuan Zhao

2014-01-01T23:59:59.000Z

56

Grid Reliability Performance Metrics Using Phasor Data and Model-less Algorithms,  

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

Reliability Performance Metrics Using Reliability Performance Metrics Using Phasor Data and Model-less Algorithms, Prototype Development and Field Test Carlos Martinez - Advanced Systems Researchers (ASR) cmartinez@asresearchers.com June 27-28 2013 Washington, DC DOE/OE Transmission Reliability Program 2 Project Objective LOAD-GENERATION CONTROL RELIABILITY PERFORMANCE REALTIME MONITORING GRID RELIABILITY PERFORMANCE PHASOR BASED AND MODELESS REALTIME MONITORING RESEARCH, PROTOTYPE AND FIELD TEST ALL APPLICATIONS IN PRODUCTION PROJECT OBJECTIVES 3 Project Analytics Approach 4 Accomplishments to be Completed in FY 2013 * Deliver to MISO the Extended Prototype Functional Specification * Complete Research, Test and Validation of Grid Post- Disturbance Reliability Metrics

57

Improving Dynamic Load and Generator Response PerformanceTools  

SciTech Connect (OSTI)

This report is a scoping study to examine research opportunities to improve the accuracy of the system dynamic load and generator models, data and performance assessment tools used by CAISO operations engineers and planning engineers, as well as those used by their counterparts at the California utilities, to establish safe operating margins. Model-based simulations are commonly used to assess the impact of credible contingencies in order to determine system operating limits (path ratings, etc.) to ensure compliance with NERC and WECC reliability requirements. Improved models and a better understanding of the impact of uncertainties in these models will increase the reliability of grid operations by allowing operators to more accurately study system voltage problems and the dynamic stability response of the system to disturbances.

Lesieutre, Bernard C.

2005-11-01T23:59:59.000Z

58

Energy Department Announces $8 Million to Improve Resiliency of the Grid  

Broader source: Energy.gov [DOE]

In support of President Obama's Climate Action Plan and the Administration’s commitment to improve national power grid resiliency, today the Energy Department announced more than $8 million for microgrid projects to help cities and towns better prepare for extreme weather events and other potential electricity disruptions. This investment – which includes seven awardees in Alaska, California, Illinois, Minnesota, New York, Tennessee and Washington – supports the development of advanced technologies, allowing communities across the country to become more resilient and adaptive.

59

A High-Performance Hybrid Computing Approach to Massive Contingency Analysis in the Power Grid  

SciTech Connect (OSTI)

Operating the electrical power grid to prevent power black-outs is a complex task. An important aspect of this is contingency analysis, which involves understanding and mitigating potential failures in power grid elements such as transmission lines. When taking into account the potential for multiple simultaneous failures (known as the N-x contingency problem), contingency analysis becomes a massively computational task. In this paper we describe a novel hybrid computational approach to contingency analysis. This approach exploits the unique graph processing performance of the Cray XMT in conjunction with a conventional massively parallel compute cluster to identify likely simultaneous failures that could cause widespread cascading power failures that have massive economic and social impact on society. The approach has the potential to provide the first practical and scalable solution to the N-x contingency problem. When deployed in power grid operations, it will increase the grid operator’s ability to deal effectively with outages and failures with power grid components while preserving stable and safe operation of the grid. The paper describes the architecture of our solution and presents preliminary performance results that validate the efficacy of our approach.

Gorton, Ian; Huang, Zhenyu; Chen, Yousu; Kalahar, Benson K.; Jin, Shuangshuang; Chavarría-Miranda, Daniel; Baxter, Douglas J.; Feo, John T.

2009-12-01T23:59:59.000Z

60

DGMonitor: A Performance Monitoring Tool for Sandbox-Based Desktop Grid Platforms  

Science Journals Connector (OSTI)

Accurate, continuous resource monitoring and profiling are critical for enabling performance tuning and scheduling optimization. In desktop grid systems that employ sandboxing, these issues are challenging because (1) subjobs inside sandboxes are executed ... Keywords: distributed computing, performance monitoring and profiling, sandboxing techniques

P. Cicotti; M. Taufer; Andrew A. Chien

2005-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

Grid Interconnection and Performance Testing Procedures for Vehicle-To-Grid (V2G) Power Electronics: Preprint  

SciTech Connect (OSTI)

Bidirectional power electronics can add vehicle-to-grid (V2G) capability in a plug-in vehicle, which then allows the vehicle to operate as a distributed resource (DR). The uniqueness of the battery-based V2G power electronics requires a test procedure that will not only maintain IEEE interconnection standards, but can also evaluate the electrical performance of the vehicle working as a DR. The objective of this paper is to discuss a recently published NREL technical report that provides interim test procedures for V2G vehicles for their integration into the electrical distribution systems and for their performance in terms of continuous output power, efficiency, and losses. Additionally, some other test procedures are discussed that are applicable to a V2G vehicle that desires to provide power reserve functions. A few sample test results are provided based on testing of prototype V2G vehicles at NREL.

Kramer, W.; Chakraborty, S.; Kroposki, B.; Hoke, A.; Martin, G.; Markel, T.

2012-03-01T23:59:59.000Z

62

The GridShare solution: a smart grid approach to improve service provision on a renewable energy mini-grid in Bhutan  

Science Journals Connector (OSTI)

This letter reports on the design and pilot installation of GridShares, devices intended to alleviate brownouts caused by peak power use on isolated, village-scale mini-grids. A team consisting of the authors and partner organizations designed, built and field-tested GridShares in the village of Rukubji, Bhutan. The GridShare takes an innovative approach to reducing brownouts by using a low cost device that communicates the state of the grid to its users and regulates usage before severe brownouts occur. This demand-side solution encourages users to distribute the use of large appliances more evenly throughout the day, allowing power-limited systems to provide reliable, long-term renewable electricity to these communities. In the summer of 2011, GridShares were installed in every household and business connected to the Rukubji micro-hydro mini-grid, which serves approximately 90 households with a 40 kW nominal capacity micro-hydro system. The installation was accompanied by an extensive education program. Following the installation of the GridShares, the occurrence and average length of severe brownouts, which had been caused primarily by the use of electric cooking appliances during meal preparation, decreased by over 92%. Additionally, the majority of residents surveyed stated that now they are more certain that their rice will cook well and that they would recommend installing GridShares in other villages facing similar problems.

T G Quetchenbach; M J Harper; J Robinson IV; K K Hervin; N A Chase; C Dorji; A E Jacobson

2013-01-01T23:59:59.000Z

63

Emerging WiFi Direct technique in home area networks for Smart Grid: Power consumption and outage performance  

Science Journals Connector (OSTI)

Abstract Considering the power saving potential of the emerging WiFi Direct technique, we evaluate the performance of WiFi Direct technique in Home Area Networks (HANs) for Smart Grid communication from two aspects: power consumption and downlink outage performance. By modeling the traffic intensity and the number of working devices in a dynamic HAN as a Markov chain, the power consumption of the dynamic HAN with Power Saving Mechanism (PSM) and the conventional static HAN with Continuous Active Mode (CAM) are evaluated and compared. On the other hand, the probability density function (PDF) of the signal to interference and noise ratio (SINR) for the active user connected in the HAN is derived from the amplitude distribution property of the classical indoor Saleh–Valenzuela (S–V) channel. The numerical results show that WiFi Direct technique not only improves the power saving in the HAN for Smart Grid, but also enhances the reliability of HAN communications for Smart Grid.

Zhuo Li; Qilian Liang; Xiuzhen Cheng

2014-01-01T23:59:59.000Z

64

Micro-grid Environmental Economic Dispatch Using Improved Linearly Decreasing Weight Particle Swarm Optimization  

Science Journals Connector (OSTI)

Comparing with large power grid, micro-grid is quite different in operation method, energy ... on the environmental economic dispatch of a simplified micro-grid which consists of photovoltaic generation, wind tur...

Gujing Han; Yunhong Xia; Wuzhi Min

2014-01-01T23:59:59.000Z

65

Smart Grid Cybersecurity: Job Performance Model Report and Phase 1 Overview  

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

Cybersecurity: Job Performance Model Report and Phase 1 Cybersecurity: Job Performance Model Report and Phase 1 Overview (August 2012) Smart Grid Cybersecurity: Job Performance Model Report and Phase 1 Overview (August 2012) In the spring of 2011, the U.S. Department of Energy awarded a project to Pacific Northwest National Laboratory in partnership with the National Board of Information Security Examiners to develop a set of guidelines to enhance development of the smart grid cybersecurity workforce and provide a foundation for future certifications. The project has three phases. The first phase produced an exploratory Job Performance Model based on a factor analysis of responses to a multi-page survey, the Job Analysis Questionnaire (JAQ). The second phase of the project will seek to validate the exploratory model in laboratory simulation studies of a small group of

66

Superalloy Surface Treatment for Improved Metal Performance  

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

Superalloy Surface Treatment Superalloy Surface Treatment for Improved Metal Performance Opportunity Research is active on the patent pending technology, titled "Method to Improve Superalloy Resistance by Surface Treatment." This technology is available for licensing and/or further collaborative research from the U.S. Department of Energy's National Energy Technology Laboratory (NETL). Overview To produce power more efficiently and cleanly, the next generation of power and aero turbines along with other essential components will have to operate at extreme temperatures and pressures. Currently advanced single crystal nickel-based superalloys are used in such extreme environments. Even though these components are coated with a bond

67

Improved plant performance through evaporative steam condensing  

SciTech Connect (OSTI)

Combining an open cooling tower and a steam condenser into one common unit is a proven technology with many advantages in power generation application, including reduced first cost of equipment, reduced parasitic energy consumption, simplified design, reduced maintenance, and simplified water treatment, Performance of the steam turbine benefits from the direct approach to wet bulb temperature, and operating flexibility and reliability improve compared to a system with a cooling tower and surface condenser. System comparisons and case histories will be presented to substantiate improved systems economies.

Hutton, D.

1998-07-01T23:59:59.000Z

68

The performance of a grid-tied microgrid with hydrogen storage and a hydrogen fuel cell stack  

Science Journals Connector (OSTI)

Abstract In a heat-power system, the use of distributed energy generation and storage not only improves system’s efficiency and reliability but also reduce the emission. This paper is focused on the comprehensive performance evaluation of a grid-tied microgrid, which consists of a PV system, a hydrogen fuel cell stack, a PEM electrolyzer, and a hydrogen tank. Electricity and heat are generated in this system, to meet the local electric and heat demands. The surplus electricity can be stored as hydrogen, which is supplied to the fuel cell stack to generate heat and power as needed. The performance of the microgrid is comprehensively evaluated and is compared with another microgrid without a fuel cell stack. As a result, the emission and the service quality in the first system are higher than those in the second one. But they both have the same overall performance.

Linfeng Zhang; Jing Xiang

2014-01-01T23:59:59.000Z

69

Improved Building Performance Through Effective Communication & Training  

E-Print Network [OSTI]

IMPROVED BUILDING PERFORMANCE THROUGH EFFECTIVE COMMUNICATION & TRAINING Rick Bates Project Manager Environmental Education Foundation Gilbert, AZ ABSTRACT This paper describes the procedures involved in the development of a...) PNC Multi-Family Capital Pure Air Control ESL-IC-10/05-51 4 RickBates.net The HVAC Source The National Air Quality Institute, LLC Thomas Rutherfoord Inc. Trade-Winds Environmental Restoration Vesar, Inc. XL...

Bates, R.

2005-01-01T23:59:59.000Z

70

Improvement of Urea SCR Performance Using Wiremesh Thermolysis...  

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

Improvement of Urea SCR Performance Using Wiremesh Thermolysis Mixer Improvement of Urea SCR Performance Using Wiremesh Thermolysis Mixer Wiremesh mixer development should bring...

71

Improved System Performance and Reduced Cost of a Fuel Reformer...  

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

Improved System Performance and Reduced Cost of a Fuel Reformer, LNT, and SCR Aftertreatment System Meeting Emissions Useful Life Requirement Improved System Performance and...

72

Training Framework to Improve the DOE Performance-Based Culture...  

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

Training Framework to Improve the DOE Performance-Based Culture Training Framework to Improve the DOE Performance-Based Culture Guidance Memorandum for implementing the Secretaries...

73

Fuel Additivies for Improved Performance of Diesel Aftertreatment...  

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

Additivies for Improved Performance of Diesel Aftertreatment Systems Fuel Additivies for Improved Performance of Diesel Aftertreatment Systems 2002 DEER Conference Presentation:...

74

Electrospray characteristic curves: in pursuit of improved performance...  

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

Electrospray characteristic curves: in pursuit of improved performance in the nano-flow regime. Electrospray characteristic curves: in pursuit of improved performance in the...

75

High Performance Hydrogen/Bromine Redox Flow Battery for Grid-Scale Energy  

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

High Performance Hydrogen/Bromine Redox Flow Battery for Grid-Scale Energy High Performance Hydrogen/Bromine Redox Flow Battery for Grid-Scale Energy Storage Title High Performance Hydrogen/Bromine Redox Flow Battery for Grid-Scale Energy Storage Publication Type Journal Article Year of Publication 2012 Authors Cho, Kyu Taek, Paul L. Ridgway, Adam Z. Weber, Sophia Haussener, Vincent S. Battaglia, and Venkat Srinivasan Journal Journal of the Electrochemical Society Volume 159 Issue 11 Pagination A1806 - A1815 Date Published 01/2012 ISSN 0013-4651 Keywords hydrogen/bromine, redox flow battery Abstract The electrochemical behavior of a promising hydrogen/bromine redox flow battery is investigated for grid-scale energy-storage application with some of the best redox-flow-battery performance results to date, including a peak power of 1.4 W/cm(2) and a 91% voltaic efficiency at 0.4 W/cm(2) constant-power operation. The kinetics of bromine on various materials is discussed, with both rotating-disk-electrode and cell studies demonstrating that a carbon porous electrode for the bromine reaction can conduct platinum-comparable performance as long as sufficient surface area is realized. The effect of flow-cell designs and operating temperature is examined, and ohmic and mass-transfer losses are decreased by utilizing a flow-through electrode design and increasing cell temperature. Charge/discharge and discharge-rate tests also reveal that this system has highly reversible behavior and good rate capability.

76

Improving Access to Foundational Energy Performance Data  

SciTech Connect (OSTI)

Access to foundational energy performance data is key to improving the efficiency of the built environment. However, stakeholders often lack access to what they perceive as credible energy performance data. Therefore, even if a stakeholder determines that a product would increase efficiency, they often have difficulty convincing their management to move forward. Even when credible data do exist, such data are not always sufficient to support detailed energy performance analyses, or the development of robust business cases. One reason for this is that the data parameters that are provided are generally based on the respective industry norms. Thus, for mature industries with extensive testing standards, the data made available are often quite detailed. But for emerging technologies, or for industries with less well-developed testing standards, available data are generally insufficient to support robust analysis. However, even for mature technologies, there is no guarantee that the data being supplied are the same data needed to accurately evaluate a product?s energy performance. To address these challenges, the U.S. Department of Energy funded development of a free, publically accessible Web-based portal, the Technology Performance Exchange(TM), to facilitate the transparent identification, storage, and sharing of foundational energy performance data. The Technology Performance Exchange identifies the intrinsic, technology-specific parameters necessary for a user to perform a credible energy analysis and includes a robust database to store these data. End users can leverage stored data to evaluate the site-specific performance of various technologies, support financial analyses with greater confidence, and make better informed procurement decisions.

Studer, D.; Livingood, W.; Torcellini, P.

2014-08-01T23:59:59.000Z

77

Improved plasma performance on Large Helical Device  

Science Journals Connector (OSTI)

Since the start of the Large Helical Device(LHD) experiment various attempts have been made to achieve improved plasma performance in LHD [A. Iiyoshi et al. Nucl. Fusion39 1245 (1999)]. Recently an inward-shifted configuration with a magnetic axis position R ax of 3.6 m has been found to exhibit much better plasma performance than the standard configuration with R ax of 3.75 m. A factor of 1.6 enhancement of energy confinement time was achieved over the International Stellarator Scaling 95. This configuration has been predicted to have unfavorable magnetohydrodynamic(MHD)properties based on linear theory even though it has significantly better particle-orbit properties and hence lower neoclassical transport loss. However no serious confinement degradation due to the MHD activities was observed resolving favorably the potential conflict between stability and confinement at least up to the realized volume-averaged beta ??? of 2.4%. An improved radial profile of electron temperature was also achieved in the configuration with magnetic islands minimized by an external perturbation coil system for the Local IslandDivertor (LID). The LID has been proposed for remarkable improvement of plasma confinement like the high (H) mode in tokamaks and the LID function was suggested in limiter experiments.

A. Komori; N. Ohyabu; H. Yamada; O. Kaneko; K. Kawahata; N. Ashikawa; P. deVaries; M. Emoto; H. Funaba; M. Goto; K. Ida; H. Idei; K. Ikeda; N. Inoue; M. Isobe; S. Kado; K. Khlopenkov; T. Kobuchi; S. Kubo; R. Kumazawa; Y. Liang; S. Masuzaki; Y. Matsumoto; T. Minami; J. Miyazawa; T. Morisaki; S. Morita; S. Murakami; S. Muto; T. Mutoh; Y. Nagayama; Y. Nakamura; H. Nakanishi; K. Narihara; Y. Narushima; K. Nishimura; N. Noda; T. Notake; S. Ohdachi; Y. Oka; M. Okamoto; M. Osakabe; T. Ozaki; R. O. Pavlichenko; B. J. Peterson; A. Sagara; K. Saito; S. Sakakibara; R. Sakamoto; H. Sasao; M. Sasao; M. Sato; T. Seki; T. Shimozuma; M. Shoji; H. Suzuki; Y. Takeiri; N. Tamura; K. Tanaka; K. Toi; T. Tokuzawa; Y. Torii; K. Tsumori; I. Yamada; S. Yamaguchi; S. Yamamoto; M. Yokoyama; Y. Yoshimura; K. Y. Watanabe; T. Watanabe; T. Watari; Y. Hamada; K. Itoh; K. Matsuoka; K. Ohkubo; T. Satow; S. Sudo; K. Yamazaki; O. Motojima; M. Fujiwara

2001-01-01T23:59:59.000Z

78

Smart Grid Cybersecurity: Job Performance Model Report LR O'Neil, PNNL  

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

9 9 Prepared for the U.S. Department of Energy under Contract DE-AC05-76RL01830 Smart Grid Cybersecurity: Job Performance Model Report LR O'Neil, PNNL MJ Assante, NBISE DH Tobey, NBISE August 2012 PNNL- 21639 Smart Grid Cybersecurity: Job Performance Model Report August 2012 Prepared for the U.S. Department of Energy under Contract DE-AC05-76RL01830 Pacific Northwest National Laboratory Richland, Washington 99352 iii Summary Evidence from the Center for Strategic and International Studies and the Defense Science Board starkly illuminate serious shortages in the talent available in the United States for cyber defense and cyber operations. The need for technically skilled people crosses both the government and private sectors. Faced

79

Improving grid reliability through integration of distributed PV and energy storage  

Science Journals Connector (OSTI)

Several emerging technologies, namely, high penetration grid-connected distributed photovoltaics (PV), energy storage, and smart grid have seen tremendous growth in recent years. Because of their interconnected nature, the deployed systems are fairly ...

Guohui Yuan

2012-01-01T23:59:59.000Z

80

Dynamic Layer-2 VPN Services for Improving Security in the Grid Environment  

Science Journals Connector (OSTI)

Pervasive and on-demand computing are now a reality, mainly in the scientific area, and the computational Grid concept is gaining popularity as a scalable ... distributed computing and data resources. But, as Grids

Francesco Palmieri

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

Integrating an Efficient Authorization Protocol with Trigon-Based Authentication Mechanism for Improving Grid Security  

Science Journals Connector (OSTI)

Security is a vital part of an integrated grid application in which heterogeneous services and resources ... dynamically. Authentication and authorization are the major security concerns in grid environment. Most...

V. Ruckmani; G. Sudha Sadasivam

2010-01-01T23:59:59.000Z

82

Improving Repository Performance by Using a Fill  

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

a Fill a Fill Improving Repository Performance by Using a Fill The use of fills, semi-independent of the specific fill material, can improve package performance. The first barrier to prevent releases from the spent nuclear fuel is the waste package itself. The longer the waste package remains intact, the lower the ultimate releases from the spent nuclear fuel. In a typical waste package over half of the interior space is empty space. There are coolant channels in the spent fuel and square fuel assemblies can not fully fill a round waste package. After the package is buried, it will begin to corrode and the walls will thin. Rock falls may cause early failure of the waste package. However, if the package is full, it is more difficult to crush a full package and fail the exterior wall. The behavior of a waste package over time is similar to a soda can. Empty cans are easy to crush. Full, sealed cans are difficult to crush because the fluid inside supports the can.

83

Modeling and improvement of direct power control of DFIG under unbalanced grid voltage condition  

Science Journals Connector (OSTI)

Abstract This paper presents analysis and control of a doubly-fed induction generator (DFIG)-based wind generation system operating under unbalanced grid voltage condition. The DFIG system is modeled in synchronous positive reference frame. System behavior and operation of both the generator and the grid side converter (GSC) under unbalanced condition is illustrated by definition of oscillating power terms in the synchronous reference frame. This analysis makes it possible to control both the active and reactive power generation by means of direct power control (DPC) technique. It is shown that considering the DFIG model in synchronous reference frame simplifies the power terms extraction. Moreover, alternative DFIG control targets such as reducing unbalanced stator current, torque and power pulsations minimization, are considered. In addition, by the proposed method, the oscillation of the stator output power is compensated by the GSC, to ensure constant power output from the overall DFIG generation system. The validation of results has been performed through simulation results on a 2 MW DFIG wind generation system.

Mohammad Jafar Zandzadeh; Abolfazl Vahedi

2014-01-01T23:59:59.000Z

84

Key performance indicators: A useful tool to assess Smart Grid goals  

Science Journals Connector (OSTI)

Abstract In the last few years, the Smart Grid concept has gained ground in the power utility scope. However, due to its multidisciplinary character (involving a stack of technologies) it is very difficult to assess the overall project success. Due to this a metric is required. In this paper, the authors review the existing metrics and (based on their experience within the Smart Grid demonstration project “Smartcity Malaga”), propose a new approach of business intelligence to bring about a new metric or set of key performance indicators for its rating. An advantage of this metric is its capacity to assist in this task. Its usefulness is also complemented with a planning tool that enables us to assess the effects of each technology under potential scenarios. This information is useful for planning projects, allowing us to make the most appropriate decisions each moment. Ultimately, this usefulness is clearly demonstrated through two case studies.

Enrique Personal; Juan Ignacio Guerrero; Antonio Garcia; Manuel Peña; Carlos Leon

2014-01-01T23:59:59.000Z

85

European Conference on Parallel and Distributed Computing (Euro-Par) Workshop on Virtualization in High-Performance Cluster and Grid Computing (VHPC)  

E-Print Network [OSTI]

in High-Performance Cluster and Grid Computing (VHPC) Las Palmas de Gran Canaria, Spain, August 26, 2008 and Grid Computing (VHPC), Las Palmas de Gran Canaria, Spain, August 26, 2008 Outline · Background in High-Performance Cluster and Grid Computing (VHPC), Las Palmas de Gran Canaria, Spain, August 26, 2008

Engelmann, Christian

86

Improving Process Heating System Performance: A Sourcebook for...  

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

Process Heating System Performance: A Sourcebook for Industry, Second Edition Improving Process Heating System Performance: A Sourcebook for Industry, Second Edition This...

87

Paint robotics—improving automotive painting performance  

Science Journals Connector (OSTI)

Robotic painting has achieved increased popularity in recent years, due to the flexibility and enhanced performance with such systems. There is a clear trend among major automobile makers to change from hard to flexible automation, and, in that respect, paint robotics is becoming increasingly more important for future paint shop design. New programming tools offer operators and paint engineers better possibility to program and maintain robot systems. With the introduction of the laser, a powerful tool is now available for real-time, in-line control of film build and the related paint process. With the additional advances in robotic-based quality inspection systems, such as a robot-mounted quality inspection camera systems, automotive manufacturers now have the possibility to document and store literally all paint quality data for a multitude of purposes related to process control. Combining these technologies offers a glimpse of a future where true closed-loop process control and quality monitoring can be used to diminish significantly the variation in paint application systems, improve flexibility, quality, and reduce operational costs, while at the same time reduce the complexity of robotic painting systems.

Einar A. Endregaard

2002-01-01T23:59:59.000Z

88

Ramp Forecasting Performance from Improved Short-Term Wind Power Forecasting: Preprint  

SciTech Connect (OSTI)

The variable and uncertain nature of wind generation presents a new concern to power system operators. One of the biggest concerns associated with integrating a large amount of wind power into the grid is the ability to handle large ramps in wind power output. Large ramps can significantly influence system economics and reliability, on which power system operators place primary emphasis. The Wind Forecasting Improvement Project (WFIP) was performed to improve wind power forecasts and determine the value of these improvements to grid operators. This paper evaluates the performance of improved short-term wind power ramp forecasting. The study is performed for the Electric Reliability Council of Texas (ERCOT) by comparing the experimental WFIP forecast to the current short-term wind power forecast (STWPF). Four types of significant wind power ramps are employed in the study; these are based on the power change magnitude, direction, and duration. The swinging door algorithm is adopted to extract ramp events from actual and forecasted wind power time series. The results show that the experimental short-term wind power forecasts improve the accuracy of the wind power ramp forecasting, especially during the summer.

Zhang, J.; Florita, A.; Hodge, B. M.; Freedman, J.

2014-05-01T23:59:59.000Z

89

Energy Performance Certification of Buildings: A Policy Tool to Improve  

Open Energy Info (EERE)

Energy Performance Certification of Buildings: A Policy Tool to Improve Energy Performance Certification of Buildings: A Policy Tool to Improve Energy Efficiency Jump to: navigation, search Tool Summary Name: Energy Performance Certification of Buildings: A Policy Tool to Improve Energy Efficiency Agency/Company /Organization: International Energy Agency Sector: Energy Focus Area: Energy Efficiency, Buildings Topics: Policies/deployment programs Resource Type: Guide/manual, Lessons learned/best practices Website: www.iea.org/papers/pathways/buildings_certification.pdf Energy Performance Certification of Buildings: A Policy Tool to Improve Energy Efficiency Screenshot References: nergy Performance Certification of Buildings[1] Logo: Energy Performance Certification of Buildings: A Policy Tool to Improve Energy Efficiency

90

Creating Markets for Green Biofuels: Measuring and improving environmental performance  

E-Print Network [OSTI]

processes, natural gas for heat, and grid electricity forgas for heat and buy electricity from the grid. However, in

Turner, Brian T.; Plevin, Richard J.; O'Hare, Michael; Farrell, Alexander E.

2007-01-01T23:59:59.000Z

91

Management Measures of Improving Water Resources Utilization in Guangxi Power Grid  

Science Journals Connector (OSTI)

by analyzing the use of water resources situation in Guangxi Power Grid, many deficiencies of the hydropower resources in Guangxi are existed, such as rich but with low development, big gap between peak and valley of power load, the inadequate capacity ... Keywords: Guangxi Power Grid, Water utilization, Management, Technical measures

Jiqing Li; Yong Wang; Cairong Mu; Biao Chen

2010-12-01T23:59:59.000Z

92

Municipal Utilities' Investment in Smart Grid Technologies Improves Services and Lowers Costs (October 2014)  

Broader source: Energy.gov [DOE]

Three municipal utilities that received funding through the Recovery Act Smart Grid Investment Grant program are featured in this report. Burbank, California; Glendale, California; and Danvers, Massachusetts are mid-sized cities that implemented grid modernization activities in multiple areas including advanced metering infrastructure, distribution automation, and customer systems.

93

Performance Contracting for Public Sector Improvement Projects  

E-Print Network [OSTI]

Johnson Controls Building Efficiency | Solutions A.Denise Malloy Solutions Account Executive December 18, 2013 Alternative Financing for Energy Efficiency Performance Contracting ESL-KT-13-12-41 CATEE 2013: Clean Air Through Energy Efficiency... Conference, San Antonio, Texas Dec. 16-18 2 Johnson Controls Confidential Overview ? What is Performance Contracting? ? What is the Performance Contracting Process? ? When does Performance Contracting Work Best? ? Government Entity ? ESCO ? 3rd Party...

Mallory, A. D.

2013-01-01T23:59:59.000Z

94

Sootblowing optimization for improved boiler performance  

DOE Patents [OSTI]

A sootblowing control system that uses predictive models to bridge the gap between sootblower operation and boiler performance goals. The system uses predictive modeling and heuristics (rules) associated with different zones in a boiler to determine an optimal sequence of sootblower operations and achieve boiler performance targets. The system performs the sootblower optimization while observing any operational constraints placed on the sootblowers.

James, John Robert; McDermott, John; Piche, Stephen; Pickard, Fred; Parikh, Neel J

2013-07-30T23:59:59.000Z

95

Improving Steam System Performance: A Sourcebook for Industry, Second Edition  

Broader source: Energy.gov [DOE]

This sourcebook is designed to provide steam system users with a reference that describes the basic steam system components, outlines opportunities for energy and performance improvements, and discusses the benefits of a systems approach in identifying and implementing these improvement opportunities. The sourcebook is divided into three main sections: steam system basics, performance improvement opportunities, and where to find help.

96

Improving Fan System Performance: A Sourcebook for Industry  

Broader source: Energy.gov [DOE]

This sourcebook is designed to provide fan system users with a reference outlining opportunities to improve system performance. It is not intended to be a comprehensive technical text on improving fan systems, but rather a document that makes users aware of potential performance improvements, provides some practical guidelines, and details where the user can find more help.

97

PVWATTS Version 2 - Enhanced Spatial Resolution for Calculating Grid-Connected PV Performance: Preprint  

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

PVWATTS Version 2 - PVWATTS Version 2 - Enhanced Spatial Resolution for Calculating Grid-Connected PV Performance Preprint October 2001 * NREL/CP-560-30941 B. Marion, M. Anderberg, R. George, P. Gray-Hann, and D. Heimiller To be presented at the NCPV Program Review Meeting Lakewood, Colorado 14-17 October 2001 National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401-3393 NREL is a U.S. Department of Energy Laboratory Operated by Midwest Research Institute * * * * Battelle * * * * Bechtel Contract No. DE-AC36-99-GO10337 NOTICE The submitted manuscript has been offered by an employee of the Midwest Research Institute (MRI), a contractor of the US Government under Contract No. DE-AC36-99GO10337. Accordingly, the US Government and MRI retain a nonexclusive royalty-free license to publish or reproduce the published

98

Incorporating traffic patterns to improve delivery performance  

E-Print Network [OSTI]

Traffic, construction and other road hazards impact the on-time performance of companies that operate delivery fleets. This study examines how incorporating traffic patterns in vehicle route development compares with ...

Dickinson, Melody J

2010-01-01T23:59:59.000Z

99

Improved System Performance and Reduced Cost of a Fuel Reformer...  

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

Improved System Performance and Reduced Cost of a Fuel Reformer, LNT, and SCR Aftertreatment System Meeting Emissions Useful Life Requirement Damodara Poojary, Jacques Nicole,...

100

U. S. Government purposes. DEVICES TO IMPROVE THE PERFORMANCE...  

Office of Scientific and Technical Information (OSTI)

an optimized design was developed in the final phase to achieve improved performance. Test results indicate that with an optimized two-stroke SI engine, the maximum percentage...

Note: This page contains sample records for the topic "improve grid performance" 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

Request for Information on Improving Performance of Federal Permitting...  

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

of Infrastructure Projects: Federal Register Notice Volume 78, No. 168 - August 29, 2013 Request for Information on Improving Performance of Federal Permitting and Review of...

102

Learning from Buildings: Technologies for Measuring, Benchmarking, and Improving Performance  

E-Print Network [OSTI]

and P. Price, 2009. “Building Energy Information Systems:2011. Learning from buildings: technologies for measuring,Information to Improve Building Performance: A Study of

Arens, Edward; Brager, Gail; Goins, John; Lehrer, David

2011-01-01T23:59:59.000Z

103

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

SciTech Connect (OSTI)

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

None

2012-02-24T23:59:59.000Z

104

Improving Dynamic Load and Generator Response Performance Tools  

E-Print Network [OSTI]

induction motors that Improving Dynamic Load and Generatorand Generator Response Performance Tools Another important example reported in the literature, also involving inductionand Generator Response Performance Tools As partial answers to these questions we note that the 20% induction

Lesieutre, Bernard C.

2005-01-01T23:59:59.000Z

105

Improving the Energy Performance of Data Centers  

E-Print Network [OSTI]

to most data centers. The second uses air-side economizers (air-side economizer scenario (ASE) requires a different type of air delivery than typically found in a data centerdata centers. The performance ratios for the ASE and WSE scenarios show that air-side economizers

Horvath, A; Shehabi, Arman

2008-01-01T23:59:59.000Z

106

Improving Pumping System Performance: A Sourcebook for Industry- Second Edition  

Broader source: Energy.gov [DOE]

This sourcebook is designed to provide pump system users with a reference that outlines opportunities for improving system performance. It is not meant to be a comprehensive technical text on pumping systems; rather, it provides practical guidelines and information to make users aware of potential performance improvements. Guidance on how to find more information and assistance is also included.

107

MANGO – Modal Analysis for Grid Operation: A Method for Damping Improvement through Operating Point Adjustment  

SciTech Connect (OSTI)

Small signal stability problems are one of the major threats to grid stability and reliability in the U.S. power grid. An undamped mode can cause large-amplitude oscillations and may result in system breakups and large-scale blackouts. There have been several incidents of system-wide oscillations. Of those incidents, the most notable is the August 10, 1996 western system breakup, a result of undamped system-wide oscillations. Significant efforts have been devoted to monitoring system oscillatory behaviors from measurements in the past 20 years. The deployment of phasor measurement units (PMU) provides high-precision, time-synchronized data needed for detecting oscillation modes. Measurement-based modal analysis, also known as ModeMeter, uses real-time phasor measurements to identify system oscillation modes and their damping. Low damping indicates potential system stability issues. Modal analysis has been demonstrated with phasor measurements to have the capability of estimating system modes from both oscillation signals and ambient data. With more and more phasor measurements available and ModeMeter techniques maturing, there is yet a need for methods to bring modal analysis from monitoring to actions. The methods should be able to associate low damping with grid operating conditions, so operators or automated operation schemes can respond when low damping is observed. The work presented in this report aims to develop such a method and establish a Modal Analysis for Grid Operation (MANGO) procedure to aid grid operation decision making to increase inter-area modal damping. The procedure can provide operation suggestions (such as increasing generation or decreasing load) for mitigating inter-area oscillations.

Huang, Zhenyu; Zhou, Ning; Tuffner, Francis K.; Chen, Yousu; Trudnowski, Daniel J.; Diao, Ruisheng; Fuller, Jason C.; Mittelstadt, William A.; Hauer, John F.; Dagle, Jeffery E.

2010-10-18T23:59:59.000Z

108

Improving Compressed Air System Performance: A Sourcebook for Industry  

Broader source: Energy.gov [DOE]

This sourcebook is designed to provide compressed air system users with a reference that outlines opportunities for system performance improvements. It is not intended to be a comprehensive technical text on improving compressed air systems, but rather a document that makes compressed air system users aware of the performance improvement potential, details some of the significant opportunities, and directs users to additional sources of assistance.

109

GridLAB-D  

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

GridLAB-D GridLAB-D 2010 Peer Review Overview * What is GridLAB-D? * Why use GridLAB-D? * How does GridLAB-D work? * How has GridLAB-D been used so far? * What is it expected in the coming year? * Funding and management details GridLAB-D Simulates the Smart Grid Power system models Load models Market models GridLAB-D model unifies keys elements of a Smart Grid  Next generation tool  Integrates models  Smart Grid analysis  Projects  Technologies  Cost/benefits  Business cases  Multi-scale models  Seconds to decades  Links to existing tools  Open source  Contributions from  Government  Industry  Academic  Vendors  Drives need for high performance computers  Vendors can add/extract modules for their own uses 3 Why simulate the smart grid?

110

Benchmarking and performance improvement at Rocky Flats Technology Site  

SciTech Connect (OSTI)

The Rocky Flats Environmental Technology Site has initiated a major work process improvement campaign using the tools of formalized benchmarking and streamlining. This paper provides insights into some of the process improvement activities performed at Rocky Flats from November 1995 through December 1996. It reviews the background, motivation, methodology, results, and lessons learned from this ongoing effort. The paper also presents important gains realized through process analysis and improvement including significant cost savings, productivity improvements, and an enhanced understanding of site work processes.

Elliott, C. [Kaiser-Hill Co., (United States); Doyle, G. [EG and G Rocky Flats, Inc., Golden, CO (United States); Featherman, W.L. [Project Performance Corp. (United States)

1997-03-01T23:59:59.000Z

111

Superior Energy Performance: A Roadmap for Achieving Continual Improvements in Energy Performance  

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

Superior Energy Performance: Superior Energy Performance: A Roadmap for Achieving Continual Improvements in Energy Performance March 4, 2010 Joe Almaguer Dow Chemical Paul Scheihing U.S. Department of Energy Agenda: * Superior Energy Performance Overview * Program Design * Program Status and Moving Forward Superior Energy Performance What is Superior Energy Performance? A market-based, ANSI-accredited plant certification program that provides industrial facilities with a roadmap for achieving continual improvement in energy efficiency while boosting competitiveness. Goals: * Drive continual improvement in energy intensity * Develop a transparent system to validate energy intensity improvements and management practices * Encourage broad participation

112

Energy Department Announces Funding to Improve Grid Resiliency and Climate Preparedness  

Broader source: Energy.gov [DOE]

The Energy Department’s Office of Electricity Delivery and Energy Reliability announced that it is making up to $3.5 million in funding available for communities to deploy smart grid tools and technologies to advance climate preparedness and resiliency of the electricity delivery infrastructure. This Funding Opportunity supports the goals of other initiatives by the Administration to prepare the Nation for the impacts of climate change by providing funding to local and tribal governments.

113

Smart Grid | Department of Energy  

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

Smart Grid Smart Grid Smart Grid Overview Smart Grid refers to electrical grids that automatically gather and communicate information on usage, allowing for remote and automated control to improve efficiency and reliability of the grid. The goals of Smart Grid technology are to allow greater consumer control, reduce pollution, improve reliability, and reduce costs. For a more detailed overview of the Smart Grid, visit the Energy.gov sites below: Smart Grid 2010 Smart Grid Report You can also view a series of short videos to learn more: SmartGrid.gov NOVA - Smart Grid Technology Smart Grid technology employs existing communications and manufacturing technology to automate and integrate the electrical grid. Sensors and meters gather data that is communicated and analyzed, allowing advanced

114

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

115

Photocatalytic performance of TiO2 thin films connected with Cu micro-grid  

Science Journals Connector (OSTI)

Aiming at reducing the recombination of photo-induced carriers in semiconductor photocatalytic process, we prepared TiO2...thin film with its surface modified by a connected Cu micro-grid via a microsphere lithog...

HaiLing Zhu; JunYing Zhang; TianMin Wang…

2009-08-01T23:59:59.000Z

116

IN53B-0827 Improving Scaling Properties of Common Statistical Operators for Gridded Geoscience Datasets Charlie Zender and Harry Mangalam, Department of Earth System Science, University of California, Irvine  

E-Print Network [OSTI]

IN53B-0827 Improving Scaling Properties of Common Statistical Operators for Gridded Geoscience Datasets Charlie Zender and Harry Mangalam, Department of Earth System Science, University data analysis costs for arithmetic operations on gridded datasets typical of satellite- or climate

Zender, Charles

117

Hydra: A Self Regenerating High Performance Computing Grid for Drug Discovery  

Science Journals Connector (OSTI)

Computational grids are therefore becoming a critically important tool for modern drug discovery, but can be expensive to deploy and maintain. ... Here we describe our implementation of alternative 3, a hybrid approach using spare cycles on users’ desktops along with a set of dedicated computers. ... Putting together the physical infrastructure to support the grid consisted of allocating space, provisioning power and installing several network switches. ...

Drew Bullard; Alberto Gobbi; Matthew A. Lardy; Charles Perkins; Zach Little

2008-03-14T23:59:59.000Z

118

DOE RFP Seeks Projects for Improving Environmental Performance of  

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

DOE RFP Seeks Projects for Improving Environmental Performance of DOE RFP Seeks Projects for Improving Environmental Performance of Unconventional Natural Gas Technologies DOE RFP Seeks Projects for Improving Environmental Performance of Unconventional Natural Gas Technologies December 21, 2011 - 12:00pm Addthis Washington, DC - Research projects to study ways for improving the environmental performance of unconventional gas development are being sought by the National Energy Technology Laboratory (NETL), a facility of the U.S. Department of Energy's (DOE) Office of Fossil Energy. The research opportunity was released in a request for proposals (RFP) issued by NETL's contractor, the Research Partnership to Secure Energy for America (RPSEA), with a deadline of March 6, 2012. A second RFP, focusing on the needs of small oil and natural gas producers, was released

119

Improving consumer value through enhanced performance around the world  

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

Improving consumer value through enhanced performance around the Improving consumer value through enhanced performance around the world Improving consumer value through enhanced performance around the world LANL statistical tools have helped create Reliability Technology (RT), which increases the overall fraction of productive manufacturing time, or "uptime," for its internal manufacturing lines. April 3, 2012 Improving consumer value through enhanced performance around the world Reliability Technology (RT) is a comprehensive reliability engineering system developed by P&G to increase the overall fraction of productive manufacturing time, or "uptime" for its internal manufacturing lines. The genesis for the system came from the large amount of runtime data collected on P&G's manufacturing lines, coupled with the Laboratory's

120

Extension of Comment Period on Improving Performance of Federal Permitting  

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

Extension of Comment Period on Improving Performance of Federal Extension of Comment Period on Improving Performance of Federal Permitting and Review of Infrastructure Projects: Federal Register Notice Volume 78, No. 186 - September 25, 2013 Extension of Comment Period on Improving Performance of Federal Permitting and Review of Infrastructure Projects: Federal Register Notice Volume 78, No. 186 - September 25, 2013 On August 29, 2013, the U.S. Department of Energy (DOE) published a Request for Information seeking information on a draft Integrated, Interagency Pre-Application (IIP) Process for significant onshore electric transmission projects requiring Federal authorizations. This notice announces an extension of the public comment period for submitting comments regarding the IIP Process to October 31, 2013. Extension of Comment Period on Improving Performance of Federal Permitting

Note: This page contains sample records for the topic "improve grid performance" 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

Extension of Comment Period on Improving Performance of Federal Permitting  

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

Extension of Comment Period on Improving Performance of Federal Extension of Comment Period on Improving Performance of Federal Permitting and Review of Infrastructure Projects: Federal Register Notice Volume 78, No. 186 - September 25, 2013 Extension of Comment Period on Improving Performance of Federal Permitting and Review of Infrastructure Projects: Federal Register Notice Volume 78, No. 186 - September 25, 2013 On August 29, 2013, the U.S. Department of Energy (DOE) published a Request for Information seeking information on a draft Integrated, Interagency Pre-Application (IIP) Process for significant onshore electric transmission projects requiring Federal authorizations. This notice announces an extension of the public comment period for submitting comments regarding the IIP Process to October 31, 2013. Extension of Comment Period on Improving Performance of Federal Permitting

122

Improving Face Recognition Performance Using a Hierarchical Bayesian Model  

E-Print Network [OSTI]

which can result in an improved recognition performance over already existing baseline approaches. We use Kernelized Fisher Discriminant Analysis (KFLD) as our baseline as it is superior to PCA in a way that it produces well separated classes even under...

Shikaripur Nadig, Ashwini

2010-04-27T23:59:59.000Z

123

Improving Motor and Drive System Performance – A Sourcebook for Industry  

Broader source: Energy.gov [DOE]

This sourcebook outlines opportunities to improve motor and drive systems performance, including practical guidelines, energy efficiency assessment instructions, and referrals to other information and assistance such as software, videos, and training opportunities.

124

Thermal simulation of batteries for improving E-powertrain performance  

Science Journals Connector (OSTI)

The electrical energy is stored, for example, in battery systems with voltages of between 12 V ... a simulation tool, 3D-Electrical / 3D-Thermal Co-Simulation for improving electric powertrain performance.

Dipl.-Ing. Michael Clauss; Jakob Hennig; Dr. Carolus Grünig…

2014-10-01T23:59:59.000Z

125

NASA's Marshall Space Flight Center Improves Cooling System Performance  

Broader source: Energy.gov [DOE]

Case study details Marshall Space Flight Center's innovative technologies to improve water efficiency and cooling performance for one of its problematic cooling systems. The program saved the facility more than 800,000 gallons of water in eight months.

126

Improving Performance of Federal Permitting and Review of Infrastructure  

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

Improving Performance of Federal Permitting and Review of Infrastructure Improving Performance of Federal Permitting and Review of Infrastructure Projects Improving Performance of Federal Permitting and Review of Infrastructure Projects The Department of Energy's (DOE) Office of Electricity Delivery and Energy Reliability, in collaboration with the Member Agencies of the Steering Committee (Member Agencies) created under Executive Order 13604 of March 22, 2012, and pursuant to the June 7, 2013 Transmission Presidential Memorandum, is seeking public input on a draft Integrated, Interagency Pre-Application (IIP) Process. The proposed IIP Process is intended to improve interagency and intergovernmental coordination focused on ensuring that project proponents develop and submit accurate and complete information early in the project planning process to facilitate efficient

127

Data Quality Assurance and Performance Measurement of Data Mining for Preventive Maintenance of Power Grid  

E-Print Network [OSTI]

permission and/or a fee. KDD4Service '11, San Diego, California, USA Copyright 2011 ACM 978 and solar, wind or cogeneration power cannot be adopted on a large scale [2]. The smart grid of the future will have to operate efficiently to satisfy the increasing capacity de- mand, and should use the current

Rudin, Cynthia

128

Security, energy, and performance-aware resource allocation mechanisms for computational grids  

Science Journals Connector (OSTI)

Distributed Cyber Physical Systems (DCPSs) are networks of computing systems that utilize information from their physical surroundings to provide important services, such as smart health, energy efficient grid and cloud computing, and smart security-aware grids. Ensuring the energy efficiency, thermal safety, and long term uninterrupted computing operation increases the scalability and sustainability of these infrastructures. Achieving this goal often requires researchers to harness an understanding of the interactions between the computing equipment and its physical surroundings. Modeling these interactions can be computationally challenging with the resources on hand and the operating requirements of such systems. In this paper, we define the independent batch scheduling in Computational Grid (CG) as a three-objective global optimization problem with makespan, flowtime and energy consumption as the main scheduling criteria minimized according to different security constraints. We use the Dynamic Voltage Scaling (DVS) methodology for reducing the cumulative power energy utilized by the system resources. We develop six genetic-based single- and multi-population meta-heuristics for solving the considered optimization problem. The effectiveness of these algorithms has been empirically justified in two different grid architectural scenarios in static and dynamic modes.

Joanna Ko?odziej; Samee Ullah Khan; Lizhe Wang; Marek Kisiel-Dorohinicki; Sajjad A. Madani; Ewa Niewiadomska-Szynkiewicz; Albert Y. Zomaya; Cheng-Zhong Xu

2014-01-01T23:59:59.000Z

129

Request for Information on Improving Performance of Federal Permitting and  

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

Information on Improving Performance of Federal Information on Improving Performance of Federal Permitting and Review of Infrastructure Projects: Federal Register Notice Volume 78, No. 168 - August 29, 2013 Request for Information on Improving Performance of Federal Permitting and Review of Infrastructure Projects: Federal Register Notice Volume 78, No. 168 - August 29, 2013 The Department of Energy's Office of Electricity Delivery and Energy Reliability, in collaboration with the Member Agencies of the Steering Committee (Member Agencies) created under Executive Order 13604 of March 22, 2012, and pursuant to the June 7, 2013 Transmission Presidential Memorandum, is seeking information on a draft Integrated, Interagency Pre-Application (IIP) Process for significant onshore electric transmission projects requiring Federal Authorization(s).

130

Impacts of Improved Day-Ahead Wind Forecasts on Power Grid Operations: September 2011  

SciTech Connect (OSTI)

This study analyzed the potential benefits of improving the accuracy (reducing the error) of day-ahead wind forecasts on power system operations, assuming that wind forecasts were used for day ahead security constrained unit commitment.

Piwko, R.; Jordan, G.

2011-11-01T23:59:59.000Z

131

Performance of the nested grid model during cold air outbreaks and periods of return flow  

E-Print Network [OSTI]

into the southern United States across the Gulf Coast, and move into the Gulf of Mexico. As the relatively cool and dry air moves over the warm and moist environment of the Gulf of Mexico, it is modified significantly (Henry and Thompson, 1976; Molinari, 1987... over a polar stereographic map projection used to archive the NGM grid point data. Highlighted points represent sites in the central Gulf, along the Texas/Louisiana coast, over north Texas, and in the lee of the Rockies...

Janish, Paul Richard

2012-06-07T23:59:59.000Z

132

Potential improvements in SiGe radioisotope thermoelectric generator performance  

SciTech Connect (OSTI)

In accordance with NASA{close_quote}s slogan: {open_quotes}Better, Cheaper, Faster,{close_quotes} this paper will address potential improvements to SiGe RTG technology to make them Better. RTGs are doubtless cheaper than {open_quotes}paper designs{close_quotes} which are better and cheaper until development, performance and safety test costs are considered. RTGs have the advantage of being fully developed and tested in the rigors of space for over twenty years. Further, unless a new system can be accelerated tested, as were the RTGs, they cannot be deployed reliably unless a number of systems have succeeded for test periods exceeding the mission lifetime. Two potential developments are discussed that can improve the basic RTG performance by 10 to 40{sup +}{percent} depending on the mission profile. These improvements could be demonstrated in years. Accelerated testing could also be performed in this period to preserve existing RTG reliability. Data from a qualification tested RTG will be displayed, while not definitive, to support the conclusions. Finally, it is anticipated that other investigators will be encouraged to suggest further modifications to the basic RTG design to improve its performance. {copyright} {ital 1999 American Institute of Physics.}

Mowery, A.L. [4 Myrtle Bank Lane, Hilton Head Island, South Carolina, 29926-2650 (United States)

1999-01-01T23:59:59.000Z

133

Improving the performance of floating solar pool covers  

SciTech Connect (OSTI)

Experimental and analytical analyses are presented for the evaluation of heat transfer through floating solar swimming pool covers. Two improved floating solar swimming pool cover designs are proposed and investigated in this paper. The results conclusively show that both new cover designs should have significantly better performance than conventional floating solar swimming pool covers.

Cole, M.A.; Lowrey, P. (San Diego State Univ., CA (United States). Dept. of Mechanical Engineering)

1992-11-01T23:59:59.000Z

134

Coordinated resource management for guaranteed high performance and efficient utilization in Lambda-Grids  

E-Print Network [OSTI]

Journal of High Performance Computing Applications, AugustConference on High Performance Computing and Communication (Conference on High Performance Computing and Networking (SC’

Taesombut, Nut

2007-01-01T23:59:59.000Z

135

Improved Initial Performance of Si Nanoparticles by Surface Oxide Reduction  

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

Improved Initial Performance of Si Nanoparticles by Surface Oxide Reduction Improved Initial Performance of Si Nanoparticles by Surface Oxide Reduction for Lithium-Ion Battery Application Title Improved Initial Performance of Si Nanoparticles by Surface Oxide Reduction for Lithium-Ion Battery Application Publication Type Journal Article Year of Publication 2011 Authors Xun, Shidi, Xiangyun Song, Michael E. Grass, Daniel K. Roseguo, Z. Liu, Vincent S. Battaglia, and Gao Li Journal Electrochemical Solid-State Letters Volume 14 Start Page A61 Issue 5 Pagination A61-A63 Date Published 02/2001 Keywords Electrochemistry, elemental semiconductors, etching, lithium, nanoparticles, secondary cells, silicon, thermal analysis, transmission electron microscopy, X-ray photoelectron spectra Abstract This study characterizes the native oxide layer of Si nanoparticles and evaluates its effect on their performance for Li-ion batteries. x-ray photoelectron spectroscopy and transmission electron microscopy were applied to identify the chemical state and morphology of the native oxide layer. Elemental and thermogravimetric analysis were used to estimate the oxide content for the Si samples. Hydrofluoric acid was used to reduce the oxide layer. A correlation between etching time and oxide content was established. The initial electrochemical performances indicate that the reversible capacity of etched Si nanoparticles was enhanced significantly compared with that of the as-received Si sample.

136

TCP HACK: a mechanism to improve performance over lossy links  

Science Journals Connector (OSTI)

In recent years, wireless networks have become increasingly common and an increasing number of devices are communicating with each other over lossy links. Unfortunately, TCP performs poorly over lossy links as it is unable to differentiate the loss due to packet corruption from that due to congestion. In this paper, we present an extension to TCP which enables TCP to distinguish packet corruption from congestion in lossy environments resulting in improved performance. We refer to this extension as the HeAder ChecKsum option (HACK). We implemented our algorithm in the Linux kernel and performed various tests to determine its effectiveness. Our results have shown that HACK performs substantially better than both selective acknowledgement (SACK) and NewReno in cases where burst corruptions are frequent. We also found that HACK can co-exist very nicely with SACK and performs even better with SACK enabled.

R.K. Balan; B.P. Lee; K.R.R. Kumar; L. Jacob; W.K.G. Seah; A.L. Ananda

2002-01-01T23:59:59.000Z

137

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

E-Print Network [OSTI]

.32%, and a reduction in error from baseline models by up to 53%. Keywords-energy forecast models; energy informatics I that physically char- acterize a building, or are based on measured building performance data. Smart meters have analysis and machine learning methods can be used to mine sensor data and extract forecast models

Prasanna, Viktor K.

138

NREL: Transmission Grid Integration - Grid Simulation  

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

Grid Simulation Grid Simulation NREL's controllable grid interface test system can reduce certification testing time and costs while providing system engineers with a better understanding of how wind turbines react to disturbances on the electric power system. To understand the behavior of wind turbines during grid disturbances, manufacturers and utility grid operators perform a series of tests and transient simulation studies. Utility operators need to estimate how much power wind turbines can provide to help regulate grid frequency. And after design modifications are made to control software, manufacturers may need to retest their turbines. But testing wind turbines in the field can be a lengthy and expensive process. NREL developed the controllable grid interface test system to reduce the

139

New MEA Materials for Improved DMFC Performance, Durability and Cost  

SciTech Connect (OSTI)

Abstract Project Title: New MEA Materials for Improved DMFC Performance, Durability and Cost The University of North Florida (UNF)--with project partners the University of Florida, Northeastern University, and Johnson Matthey--has recently completed the Department of Energy (DOE) project entitled “New MEA Materials for Improved DMFC Performance, Durability and Cost”. The primary objective of the project was to advance portable fuel cell MEA technology towards the commercial targets as laid out in the DOE R&D roadmap by developing a passive water recovery MEA (membrane electrode assembly). Developers at the University of North Florida identified water management components as an insurmountable barrier to achieving the required system size and weight necessary to achieve the energy density requirements of small portable power applications. UNF developed an innovative “passive water recovery” MEA for direct methanol fuel cells (DMFC) which provides a path to system simplification and optimization. The passive water recovery MEA incorporates a hydrophobic, porous, barrier layer within the cathode electrode, so that capillary pressure forces the water produced at the cathode through holes in the membrane and back to the anode. By directly transferring the water from the cathode to the anode, the balance of plant is very much simplified and the need for heavy, bulky water recovery components is eliminated. At the heart of the passive water recovery MEA is the UNF DM-1 membrane that utilizes a hydrocarbon structure to optimize performance in a DMFC system. The membrane has inherent performance advantages, such as a low methanol crossover (high overall efficiency), while maintaining a high proton conductivity (good electrochemical efficiency) when compared to perfluorinated sulfonic acid membranes such as Nafion. Critically, the membrane provides an extremely low electro-osmotic drag coefficient of approximately one water molecule per proton (versus the 2-3 for Nafion) that minimizes flooding issues at the cathode, which often fatally limit open cathode MEA performance. During this successfully completed DOE program the project team met all of the project goals. The team built and tested over 1,500 MEAs with a wide range of different manufacturing chemistries and process conditions. This project demonstrated that the UNF MEA design could be fabricated with a high degree of reproducibility and repeatability. Some specific achievements include: • Durability - The UNF MEA has demonstrated over 11,000 hours continuous operation in a short stack configuration. The root cause of an off-state degradation issue was successfully mitigated by modifying the manufacturing process by changing the wetting agents used in the catalyst printing. The stability of the anode electrode was increased by replacing the anode electrodes with a stabilized PtRu/C catalyst. The overall degradation rate was significantly reduced through optimization of the MEA operating conditions. • Performance - The project team optimized the performance of the critical MEA sub-components. By increasing the membrane thickness, the methanol crossover was reduced, thereby increasing the fuel utilization efficiency without sacrificing any electrochemical performance. The reduction in methanol crossover increased the fuel utilization efficiency from 78% to over 90%. The liquid barrier layer was optimized to provide improved reproducibility, thereby improving stack voltage uniformity and reliability. Additionally the barrier layer water permeability was lowered without sacrificing any power density, thereby enabling increased operating temperature. Improvements in the cathode catalyst selection and coating provided an additional 10% to 20% improvement in the MEA performance at the target operating range. • Cost - Commercially scalable processes were developed for all of the critical MEA components which led to improved yields and lower overall manufacturing costs. Furthermore, significant steps have been made in improving the process control, which increases MEA

Fletcher, James H. [University of North Florida; Campbell, Joseph L. [University of North Florida; Cox, Philip [University of North Florida; Harrington, William J. [University of North Florida

2013-09-16T23:59:59.000Z

140

Improving Building Performance at Urban Scale with a Framework for  

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

Building Performance at Urban Scale with a Framework for Building Performance at Urban Scale with a Framework for Real-time Data Sharing Title Improving Building Performance at Urban Scale with a Framework for Real-time Data Sharing Publication Type Conference Proceedings LBNL Report Number LBNL-6303E Year of Publication 2013 Authors Pang, Xiufeng, Tianzhen Hong, and Mary Ann Piette Date Published 05/2013 Keywords building performance, energy efficiency, energy modeling, optimal operation, urban scale. Abstract This paper describes work in progress toward an urban-scale system aiming to reduce energy use in neighboring buildings by providing three components: a database for accessing past and present weather data from high quality weather stations; a network for communicating energy-saving strategies between building owners; and a set of modeling tools for real-time building energy simulation.

Note: This page contains sample records for the topic "improve grid performance" 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

Agriculture model development to improve performance of the Community Land  

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

Agriculture model development to improve performance of the Community Land Agriculture model development to improve performance of the Community Land Model April 3, 2013 The important relationships between climate change and agriculture are uncertain, particularly the feedbacks related to the carbon cycle. Nevertheless, vegetation models have not yet considered the full impacts of management practices and nitrogen feedbacks on the carbon cycle. We are working to meet this need. We have integrated three crop types (corn, soybean, and spring wheat) into the Community Land Model (CLM). In developing the agriculture version of CLM, we added plant processes related to management practices and nitrogen cycling. A manuscript documenting our changes to CLM has been accepted for publication in Geoscientific Model Development Discussions ("Modeling

142

Improving Repository Performance by Using DU Dioxide Fill  

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

DU Dioxide Fill DU Dioxide Fill Improving Repository Performance by Using DU Dioxide Fill Fills may improve repository performance by acting as sacrificial materials, which delay the degradation of SNF uranium dioxide. Because fill and SNF have the same chemical form of uranium (uranium dioxide), the DU dioxide in a repository is the only fill which has the same behavior as that of the SNF. In the natural environment, some uranium ore deposits have remained intact for very long periods of time. The outer parts of the ore deposit degrade while the inner parts of the deposit are protected. The same approach is proposed herein for protecting SNF. The application could use half or more of the DU inventory in the United States. Behavior of Uranium and Potential Behavior of a Waste Package with SNF and Fill

143

Performance improvement plan use in implementing conduct of operations  

SciTech Connect (OSTI)

The Nuclear Materials Processing and Waste Management and Environmental Restoration Divisions (NMPD/WMER) of the Westinghouse Savannah River Company (WSRC) operate nineteen individual facilities at Savannah River Site (SRS). These facilities produce the fuel and target assemblies for the SRS Reactors: extract Tritium, Plutonium, Uranium and other isotopes from the irradiated fuel and targets; safely store the radioactive waste from ongoing operations; and encapsulate the waste in a final waste form for long term disposal. Continuous improvement in the operation of all facilities and in the conduct of business at SRS is the goal embodied in the NMPD/WMER Performance Improvement Plan (PIP) discussed in this document. The NMPD/WMER PIP is the mechanism used to establish a basis for operations that will lead to achievement of a performance level that will meet or exceed the standards developed and used in the commercial nuclear power industry.

Baumhardt, R.J.

1992-06-01T23:59:59.000Z

144

Performance improvement plan use in implementing conduct of operations  

SciTech Connect (OSTI)

The Nuclear Materials Processing and Waste Management and Environmental Restoration Divisions (NMPD/WMER) of the Westinghouse Savannah River Company (WSRC) operate nineteen individual facilities at Savannah River Site (SRS). These facilities produce the fuel and target assemblies for the SRS Reactors: extract Tritium, Plutonium, Uranium and other isotopes from the irradiated fuel and targets; safely store the radioactive waste from ongoing operations; and encapsulate the waste in a final waste form for long term disposal. Continuous improvement in the operation of all facilities and in the conduct of business at SRS is the goal embodied in the NMPD/WMER Performance Improvement Plan (PIP) discussed in this document. The NMPD/WMER PIP is the mechanism used to establish a basis for operations that will lead to achievement of a performance level that will meet or exceed the standards developed and used in the commercial nuclear power industry.

Baumhardt, R.J.

1992-01-01T23:59:59.000Z

145

Performance improvement of direct- and indirect-fired heaters  

SciTech Connect (OSTI)

The operating performance of direct and indirect heaters is discussed, and principles and guidelines that can be applied to effect improvements in efficiency are presented. This paper also discusses the associated heater efficiencies and several useful operating techniques to approach the maximum, steady-state heater efficiency. The techniques presented apply to all types of direct-and indirect-fired heaters: salt bath heaters, propane vaporizers, heater/treaters, production heaters, and glycol and amine regenerators.

Sams, G.W.; Hunter, J.D.

1988-08-01T23:59:59.000Z

146

Improving the dynamic performance of a complex AC/DC system by HVDC control modifications  

SciTech Connect (OSTI)

The power system of Hydro-Quebec has a peak load of approximately 27 GW. The great distance between the production sites and the load centers introduces stability limitations, which is the reason why the Quebec grid cannot be economically synchronized (through ac transmission with limited capacity) with the U.S. northeastern network. Power exports are therefore dependent on the use of HVDC links of which Hydro-Quebec now possesses five, for a capacity of over 2600 MW. Such a capacity will again soon increase. At the moment, the Chateauguay scheme has the largest HVDC capacity. It transfers 1000 MW by means of two Back-to-Back converter blocks. Various automatic control systems are installed on the Chateauguay scheme owing to the fact that a single circuit of a 765 kV ac line transmits the output of both the HVDC converter stations as well as the output from Beauharnois hydro generating station. Such controls have performed satisfactorily since 1984. However, a remarkable improvement of the overall ac/dc system dynamic performance can be gained by making certain modifications in some of these HVDC system controls. This paper presents the salient features of such control modifications, currently under consideration, using the results of an investigation by digital and analogue simulations that demonstrate the achieved improvements.

Hammad, A.E. (ABB Power Systems, Baden (CH)); Gagnon, J. (Hydro Quebec, Montreal (CA)); McCallum, D. (IREQ, Montreal (CA))

1990-10-01T23:59:59.000Z

147

Reliability evaluation of smart distribution grids.  

E-Print Network [OSTI]

??The term "Smart Grid" generally refers to a power grid equipped with the advanced technologies dedicated for purposes such as reliability improvement, ease of control… (more)

Kazemi, Shahram

2011-01-01T23:59:59.000Z

148

1st International Workshop on High Performance Computing, Networking and Analytics for the Power Grid  

E-Print Network [OSTI]

1st International Workshop on High Performance Computing, Networking and Analytics for the Power Transient Stability" #12;1st International Workshop on High Performance Computing, Networking and Analytics (University of Vermont). "Developing a Dynamic Model of Cascading Failure for High Performance Computing using

149

Sustainable Disposal Cell Covers: Legacy Management Practices, Improvements, and Long-Term Performance  

Broader source: Energy.gov [DOE]

Sustainable Disposal Cell Covers: Legacy Management Practices, Improvements, and Long-Term Performance

150

Feed-Pump Hydraulic Performance and Design Improvement, Phase I:  

Office of Scientific and Technical Information (OSTI)

Feed-Pump Hydraulic Performance Feed-Pump Hydraulic Performance and Design Improvement, Phase I: J2esearch Program Design Volume 2 EPRI EPRI CS-2323 Volume 2 Project 1884-6 Final Report March 1982 Keywords: Feed Pumps Feed Pump Reliability Feed Pump Hydraulics Feed Pump Design Feed Pump Research Feed Pump Specifications Prepared by Borg-Warner Corporation (Byron Jackson Pump Division and Borg-Warner Research Center) Carson, California and Massa^ f Technology Cambri__ . s ,-T. a a *a_^"nt.- ji^, w « ' jm.m ^j.^M\MMMim^mjii'mmmjmiiiimm\i- " I E CT R I C P 0 W E R R E S E A R C H I N ST ITO T E DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency Thereof, nor any of their employees,

151

Improvements in EMC performance of inverter-fed motor drives  

SciTech Connect (OSTI)

An experimental investigation of conducted radio-noise emission from a conventional pulse width modulated (PWM) inverter of medium power feeding an induction motor is described. It is determined that the inverter system generates considerable impulse currents through the power leads feeding the system resulting in serious conducted electromagnetic interference (EMI) problems and significant voltage waveform distortion in the power system. The dominant emission sources in the system are identified. A proposed model of the drive system for the purpose of evaluation of EMI are developed. Several low-cost strategies for improvement in EMC performance of the PWM inverter are then proposed. Experimental results demonstrate that disturbance from the modified system can be dramatically reduced and that the EMC performance of the system has come very close to meeting the IEC CISPR and FCC limits on conducted emissions for digital devices.

Zhong, E.; Lipo, T.A. [Univ. of Wisconsin, Madison, WI (United States). Dept. of Electrical and Computer Engineering

1995-11-01T23:59:59.000Z

152

Improving Emergency Response and Human-Robotic Performance  

SciTech Connect (OSTI)

Preparedness for chemical, biological, and radiological/nuclear incidents at nuclear power plants (NPPs) includes the deployment of well trained emergency response teams. While teams are expected to do well, data from other domains suggests that the timeliness and accuracy associated with incident response can be improved through collaborative human-robotic interaction. Many incident response scenarios call for multiple, complex procedure-based activities performed by personnel wearing cumbersome personal protective equipment (PPE) and operating under high levels of stress and workload. While robotic assistance is postulated to reduce workload and exposure, limitations associated with communications and the robot’s ability to act independently have served to limit reliability and reduce our potential to exploit human –robotic interaction and efficacy of response. Recent work at the Idaho National Laboratory (INL) on expanding robot capability has the potential to improve human-system response during disaster management and recovery. Specifically, increasing the range of higher level robot behaviors such as autonomous navigation and mapping, evolving new abstractions for sensor and control data, and developing metaphors for operator control have the potential to improve state-of-the-art in incident response. This paper discusses these issues and reports on experiments underway intelligence residing on the robot to enhance emergency response.

David I. Gertman; David J. Bruemmer; R. Scott Hartley

2007-08-01T23:59:59.000Z

153

Continuous improvement of the MHTGR safety and competitive performance  

SciTech Connect (OSTI)

An increase in reactor module power from 350 to 450 MW(t) would markedly improve the economics of the Modular High Temperature Gas-Cooled Reactor (MHTGR). The higher power level was recommended as the result of an in-depth cost reduction study undertaken to compete with the declining price of fossil fuel. The safety assessment confirms that the high level of safety, which relies on inherent characteristics and passive features, is maintained at the elevated power level. Preliminary systems, nuclear, and safety performance results are discussed for the recommended 450 MW(t) design. Optimization of plant parameters and design modifications accommodated the operation of the steam generator and circulator at the higher power level. Events in which forced cooling is lost, designated as conduction cooldowns are described in detail. For the depressurized conduction cooldown, without full helium inventory, peak fuel temperatures are significantly lowered. A more negative temperature coefficient of reactivity was achieved while maintaining an adequate fuel cycle and reactivity control. Continual improvement of the MHTGR delivers competitive performance without relinquishing the high safety margins demanded of the next generation of power plants.

Eichenberg, T.W.; Etzel, K.T.; Mascaro, L.L.; Rucker, R.A.

1992-05-01T23:59:59.000Z

154

Performance improvement options for the supercritical carbon dioxide brayton cycle.  

SciTech Connect (OSTI)

The supercritical carbon dioxide (S-CO{sub 2}) Brayton cycle is under development at Argonne National Laboratory as an advanced power conversion technology for Sodium-Cooled Fast Reactors (SFRs) as well as other Generation IV advanced reactors as an alternative to the traditional Rankine steam cycle. For SFRs, the S-CO{sub 2} Brayton cycle eliminates the need to consider sodium-water reactions in the licensing and safety evaluation, reduces the capital cost of the SFR plant, and increases the SFR plant efficiency. Even though the S-CO{sub 2} cycle has been under development for some time and optimal sets of operating parameters have been determined, those earlier development and optimization studies have largely been directed at applications to other systems such as gas-cooled reactors which have higher operating temperatures than SFRs. In addition, little analysis has been carried out to investigate cycle configurations deviating from the selected 'recompression' S-CO{sub 2} cycle configuration. In this work, several possible ways to improve S-CO{sub 2} cycle performance for SFR applications have been identified and analyzed. One set of options incorporates optimization approaches investigated previously, such as variations in the maximum and minimum cycle pressure and minimum cycle temperature, as well as a tradeoff between the component sizes and the cycle performance. In addition, the present investigation also covers options which have received little or no attention in the previous studies. Specific options include a 'multiple-recompression' cycle configuration, intercooling and reheating, as well as liquid-phase CO{sub 2} compression (pumping) either by CO{sub 2} condensation or by a direct transition from the supercritical to the liquid phase. Some of the options considered did not improve the cycle efficiency as could be anticipated beforehand. Those options include: a double recompression cycle, intercooling between the compressor stages, and reheating between the turbine stages. Analyses carried out as part of the current investigation confirm the possibilities of improving the cycle efficiency that have been identified in previous investigations. The options in this group include: increasing the heat exchanger and turbomachinery sizes, raising of the cycle high end pressure (although the improvement potential of this option is very limited), and optimization of the low end temperature and/or pressure to operate as close to the (pseudo) critical point as possible. Analyses carried out for the present investigation show that significant cycle performance improvement can sometimes be realized if the cycle operates below the critical temperature at its low end. Such operation, however, requires the availability of a heat sink with a temperature lower than 30 C for which applicability of this configuration is dependent upon the climate conditions where the plant is constructed (i.e., potential performance improvements are site specific). Overall, it is shown that the S-CO{sub 2} Brayton cycle efficiency can potentially be increased to 45 %, if a low temperature heat sink is available and incorporation of larger components (e.g.., heat exchangers or turbomachinery) having greater component efficiencies does not significantly increase the overall plant cost.

Moisseytsev, A.; Sienicki, J. J.; Nuclear Engineering Division

2008-07-17T23:59:59.000Z

155

GMATE: Dynamic Tuning of Parallel Applications in Grid Environment  

Science Journals Connector (OSTI)

Performance is a main issue in parallel application development. Dynamic tuning is a technique that changes certain applications' parameters on-line to improve their performance adapting the execution to actual conditions. To perform that, it is necessary ... Keywords: Computational Grid, Dynamic tuning, Performance model

Genaro Costa, Anna Sikora, Josep Jorba, Tomàs Margalef

2014-06-01T23:59:59.000Z

156

A metrological large range atomic force microscope with improved performance  

Science Journals Connector (OSTI)

A metrological large range atomic force microscope (Met. LR-AFM) has been set up and improved over the past years at Physikalisch-Technische Bundesanstalt (PTB). Being designed as a scanning sample type instrument the sample is moved in three dimensions by a mechanical ball bearing stage in combination with a compact z -piezostage. Its topography is detected by a position-stationary AFM head. The sample displacement is measured by three embedded miniature homodyneinterferometers in the x y and z directions. The AFM head is aligned in such a way that its cantilever tip is positioned on the sample surface at the intersection point of the three interferometer measurement beams for satisfying the Abbe measurement principle. In this paper further improvements of the Met. LR-AFM are reported. A new AFM head using the beam deflection principle has been developed to reduce the influence of parasitic optical interference phenomena. Furthermore an off-line Heydemann correction method has been applied to reduce the inherent interferometer nonlinearities to less than 0.3 nm ( p - v ) . Versatile scanning functions for example radial scanning or local AFM measurement functions have been implemented to optimize the measurement process. The measurement software is also improved and allows comfortable operations of the instrument via graphical user interface or script-based command sets. The improved Met. LR-AFM is capable of measuring for instance the step height lateral pitch line width nanoroughness and other geometrical parameters of nanostructures.Calibration results of a one-dimensional grating and a set of film thickness standards are demonstrated showing the excellent metrological performance of the instrument.

Gaoliang Dai; Helmut Wolff; Frank Pohlenz; Hans-Ulrich Danzebrink

2009-01-01T23:59:59.000Z

157

Meeting security and user behavior requirements in Grid scheduling  

Science Journals Connector (OSTI)

Most of current research in Grid computing is still focused on the improvement of the performance of Grid schedulers. However, unlike traditional scheduling, in Grid systems there are other important requirements to be taken into account. One such a requirement is the secure scheduling, namely achieving an efficient allocation of tasks to reasonable trustful resources. In this paper we formalize the Grid scheduling problem as a non-cooperative non-zero sum game of the Grid users in order to address the security requirements. The premise of this model is that in a large-scale Grid, the cooperation among all users in the system is unlikely to happen. The users’ cost of playing the game is interpreted as a total cost of the secure job execution in Grid. The game cost function is minimized, at global (Grid) and local (users) levels, by using four genetic-based hybrid meta-heuristics. We have evaluated the proposed model under the heterogeneity, the large-scale and dynamics conditions using a Grid simulator. The relative performance of four hybrid schedulers is measured by the makespan and flowtime metrics. The obtained results suggested that it is more resilient for the Grid users to pay some additional scheduling cost, due to verification of the security conditions, instead of taking the risk of assigning their tasks to unreliable resources.

Joanna Ko?odziej; Fatos Xhafa

2011-01-01T23:59:59.000Z

158

Cooperative and Non-Cooperative house energy optimization in a Smart Grid perspective  

Science Journals Connector (OSTI)

Energy demand management for residential users is a promising research area within the Smart Grid revolution. The whole energy generation and distribution system performance can indeed be improved by optimizing the house energy management while still ... Keywords: energy consumption, noncooperative house energy optimization, smart grid perspective, energy demand management, energy generation, distribution system performance, optimal planning

A. Barbato; A. Capone; G. Carello; M. Delfanti; M. Merlo; A. Zaminga

2011-06-01T23:59:59.000Z

159

Performance Prediction for Parallel Numerical Software on the White Rose Grid  

E-Print Network [OSTI]

and Peter K. Jimack School of Computing, University of Leeds, UK {roman,pkj}@comp.leeds.ac.uk Abstract. Since different computer architectures have different performance characteristics, different levels automatic pre- dictive capabilities that will allow optimal de- cisions to be made concerning the selection

Jimack, Peter

160

Improving the performance of algorithms to find communities in networks  

Science Journals Connector (OSTI)

Most algorithms to detect communities in networks typically work without any information on the cluster structure to be found, as one has no a priori knowledge of it, in general. Not surprisingly, knowing some features of the unknown partition could help its identification, yielding an improvement of the performance of the method. Here we show that, if the number of clusters was known beforehand, standard methods, like modularity optimization, would considerably gain in accuracy, mitigating the severe resolution bias that undermines the reliability of the results of the original unconstrained version. The number of clusters can be inferred from the spectra of the recently introduced nonbacktracking and flow matrices, even in benchmark graphs with realistic community structure. The limit of such a two-step procedure is the overhead of the computation of the spectra.

Richard K. Darst; Zohar Nussinov; Santo Fortunato

2014-03-20T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

Development of improved performance refractory liner materials for slagging gasifiers  

SciTech Connect (OSTI)

Refractory liners for slagging gasifiers used in power generation, chemical production, or as a possible future source of hydrogen for a hydrogen based economy, suffer from a short service life. These liner materials are made of high Cr2O3 and lower levels of Al2O3 and/or ZrO2. As a working face lining in the gasifier, refractories are exposed to molten slags at elevated temperature that originate from ash in the carbon feedstock, including coal and/or petroleum coke. The molten slag causes refractory failure by corrosion dissolution and by spalling. The Albany Research Center is working to improve the performance of Cr2O3 refractories and to develop refractories without Cr2O3 or with Cr2O3 content under 30 wt pct. Research on high Cr2O3 materials has resulted in an improved refractory with phosphate additions that is undergoing field testing. Results to date of field trials, along with research direction on refractories with no or low Cr2O3, will be discussed.

Kwong, Kyei-Sing; Bennett, James P.; Powell, Cynthia; Thomas, Hugh; Krabbe, Rick

2005-01-01T23:59:59.000Z

162

Three fault ride through controllers for wind systems running in isolated micro-grid and Effects of fault type on their performance: A review and comparative study  

Science Journals Connector (OSTI)

Abstract This paper presents survey about Fault Ride Through (FRT) techniques and controllers which employed with all wind generation system types. After presenting a comprehensive FRT survey, paper proposes three Fault Ride Through (FRT) controllers for keeping stability of Fixed Speed Wind Generation (FSWG) system serving in isolated Micro-Grid (MG). The first controller has been implemented by inserting Superconductor Fault Current Limiter (SFCL) in series with wind generator terminals during fault instant. The second proposed FRT controller is modifying the conventional Pitch Angle Controllers (PAC) to can spill and reduce high percentage of extracted mechanical wind power during and subsequent fault occurrence which in turns help stability improvement and restoration. Third FRT technique is performed by adapting the wind turbine gearbox ratio which forces the wind generation system to run far from the maximum power point. The best performance is obtained with the SFCL controller. Superior results are obtained when the three proposed FRT controllers are employed simultaneously. The three developed FRT controllers are simple, reliable and economical attractive. Effects of fault type on SFCL FRT controller performance are analyzed and investigated in details. The proposed SFCL FRT controller has been tested under single phase, double phase, phase to phase, and three phases to ground faults. Results display that the three phases to ground fault is the most severe type on SFCL FRT performance from stability point of view. On the other hand, double phase to ground fault is the most severe one from fluctuations and oscillations points of view. Parameters of the SFCL must be adjusted based on the three phases to ground fault. If the SFCL FRT controller is designed to can deal with three phases fault, it sure can deal with the other fault types successfully.

Rashad M. Kamel

2014-01-01T23:59:59.000Z

163

High Performance Healthcare Buildings: A Roadmap to Improved Energy Efficiency  

E-Print Network [OSTI]

Roadmap to Improved Energy Efficiency iii 11-Sept-2009 ListA Roadmap to Improved Energy Efficiency 11-Sept-2009 Topic /A Roadmap to Improved Energy Efficiency 11-Sept-2009 Topic /

Singer, Brett C.

2010-01-01T23:59:59.000Z

164

Coplanar interdigitated grid detector with single electrode readout  

DOE Patents [OSTI]

The coplanar interdigitated grid technique with single electrode readout provides substantial spectral performance improvement over that of conventional full-area planar electrode detectors and over coplanar interdigitated grid detectors which measure the difference between the induced charge signals from two interdigitated coplanar grid electrodes. The signal from only one interdigitated grid electrode is read out. The signal response is optimized by changing the relative areas of the two grid electrodes and the bias applied across the detector. Only one preamplifier is needed and signal subtraction is not necessary. This eliminates the electronic noise contribution from the additional preamplifier used in the normal coplanar grid implementation, and conventional single-amplifier detector electronics can be used.

Luke, Paul N. (Castro Valley, CA)

2001-01-01T23:59:59.000Z

165

Improving Indoor Environmental Quality and Energy Performance of Modular  

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

Indoor Environmental Quality and Energy Performance of Modular Indoor Environmental Quality and Energy Performance of Modular Classroom HVAC Systems Title Improving Indoor Environmental Quality and Energy Performance of Modular Classroom HVAC Systems Publication Type Conference Proceedings Year of Publication 2005 Authors Apte, Michael G., Michael Spears, Chi-Ming Lai, and Derek G. Shendell Conference Name Proceedings of Sustainable Buildings 2005 Conference Pagination 1432-1437 Conference Location Tokyo, Japan, September 27-29, 2005 Abstract The factory-built relocatable classroom (RC) is a dominant force in the school facility construction industry in the United States (U.S.) and elsewhere. It is estimated that there are approximately 650,000 RCs currently occupied in the U.S., housing about 16 million students. RCs receive public attention due to complaints about poor indoor environmental quality (IEQ). Both measured data and anecdotal evidence in California have suggested excessive acoustical noise from heating, ventilation, and air conditioning (HVAC) equipment as a central factor leading to degraded IEQ. In the U.S., RCs are typically equipped with unitary exterior wall-mount HVAC systems, and interior acoustical noise due to structural and airborne transmission can reach levels of about 58dB(A) with compressor cycling, under unoccupied conditions. Due to these noise levels teachers often simply choose to turn off the HVAC, leading to inadequate ventilation, as well as poor thermal conditioning, and thus to poor indoor air quality. Elevated levels of carbon dioxide and volatile organic compounds including formaldehyde are common. We discuss the acoustic component of our efforts to develop and test energy efficient HVAC systems that address the ventilation, controls, and acoustic requirements necessary to ensure high quality indoor environments in RCs

166

Improved LWR Cladding Performance by EPD Surface Modification Technique  

SciTech Connect (OSTI)

This project will utilize the electro-phoretic deposition technique (EPD) in conjunction with nanofluids to deposit oxide coatings on prototypic zirconium alloy cladding surfaces. After demonstrating that this surface modification is reproducible and robust, the team will subject the modified surface to boiling and corrosion tests to characterize the improved nucleate boiling behavior and superior corrosion performance. The scope of work consists of the following three tasks: The first task will employ the EPD surface modification technique to coat the surface of a prototypic set of zirconium alloy cladding tube materials (e.g. Zircaloy and advanced alloys such as M5) with a micron-thick layer of zirconium oxide nanoparticles. The team will characterize the modified surface for uniformity using optical microscopy and scanning-electron microscopy, and for robustness using standard hardness measurements. After zirconium alloy cladding samples have been prepared and characterized using the EPD technique, the team will begin a set of boiling experiments to measure the heat transfer coefficient and critical heat flux (CHF) limit for each prepared sample and its control sample. This work will provide a relative comparison of the heat transfer performance for each alloy and the surface modification technique employed. As the boiling heat transfer experiments begin, the team will also begin corrosion tests for these zirconium alloy samples using a water corrosion test loop that can mimic light water reactor (LWR) operational environments. They will perform extended corrosion tests on the surface-modified zirconium alloy samples and control samples to examine the robustness of the modified surface, as well as the effect on surface oxidation

Michael Corradini; Kumar Sridharan

2012-11-26T23:59:59.000Z

167

Parametrization-independent elliptic surface grid generation  

E-Print Network [OSTI]

The generation of computational grids on surfaces of three-dimensional configurations is an important component of many areas of computational research, both as a boundary grid for volume grid generation or to perform ...

Rasmussen, Britt Bille

2009-01-01T23:59:59.000Z

168

Furnace Blower Performance Improvements- Building America Top Innovation  

Broader source: Energy.gov [DOE]

This Top Innovation profile describes Building America research into improving efficiency of furnace fan blowers.

169

NERSC and HDF Group Optimize HDF5 Library to Improve I/O Performance  

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

NERSC and HDF Group Optimize HDF5 Library to Improve IO Performance NERSC and HDF Group Optimize HDF5 Library to Improve IO Performance June 28, 2010 A common complaint among air...

170

Smart Grid | OpenEI Community  

Open Energy Info (EERE)

Smart Grid Smart Grid Home Graham7781's picture Submitted by Graham7781(1992) Super contributor 16 August, 2013 - 12:21 New report from White House outlines largest problems facing United States energy grid energy grid OpenEI President Smart Grid United States White House Graham7781's picture Submitted by Graham7781(1992) Super contributor 15 August, 2013 - 09:09 DOE Report Describes Progress in the Deployment of Synchrophasor Technologies for Improved Grid Operations OpenEI PMU recovery act SGIG Smart Grid Graham7781's picture Submitted by Graham7781(1992) Super contributor 15 March, 2013 - 10:23 Quarterly Smart Grid Data available for download on OpenEI data download OpenEI quarterly Smart Grid Smartgrid.gov SmartGrid.gov is a resource for information about the Smart Grid and government-sponsored Smart Grid projects. The information on SmartGrid.gov

171

High Performance Healthcare Buildings: A Roadmap to Improved Energy Efficiency  

E-Print Network [OSTI]

source heat pumps (newer designs are greatly improved), condensing boilers, advanced control sequences to allow utilization of variable air

Singer, Brett C.

2010-01-01T23:59:59.000Z

172

DOE Grids Service Transition  

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

DOE Grids Service Transition DOE Grids Service Transition Services Overview ECS Audio/Video Conferencing Fasterdata IPv6 Network Network Performance Tools (perfSONAR) ESnet OID Registry PGP Key Service Virtual Circuits (OSCARS) DOE Grids Service Transition Contact Us Technical Assistance: 1 800-33-ESnet (Inside the US) 1 800-333-7638 (Inside the US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: trouble@es.net Provide Web Site Feedback: info@es.net DOE Grids Service Transition Background ESnet has decided to transition support and management for the certificate services provided by the DOE Grids public key infrastructure (PKI) to the Open Sciences Grid (OSG). OSG and ESnet provide service to many of the same user communities, and have long been collaborators in the areas of identity

173

Preliminary version; to appear in 8th IEEE/ACM International Conference on Grid Computing (Grid 2007), Sept 19-21,2007, Austin, TX Meeting Virtual Organization Performance Goals through  

E-Print Network [OSTI]

/or application layers, security patches, and modification to scheduling policies are just some examples of grid of effecting change when viewed holistically. For example, a security vulnerability in a grid must be correctedPreliminary version; to appear in 8th IEEE/ACM International Conference on Grid Computing (Grid

Humphrey, Marty

174

High Performance Healthcare Buildings: A Roadmap to Improved Energy  

E-Print Network [OSTI]

and benchmarking energy use; best practices and training; codes and standards; improved utilization of existing HVAC designs and technology; innovation in HVAC design and technology; electrical system design

175

High Performance Healthcare Buildings: A Roadmap to Improved Energy Efficiency  

E-Print Network [OSTI]

operation with energy efficiency in building systems. X X Xoperation with energy efficiency in building systems. 10.3.energy efficiency improvements in healthcare buildings. A

Singer, Brett C.

2010-01-01T23:59:59.000Z

176

Improving Pumping System Performance: A Sourcebook for Industry, Second Edition  

SciTech Connect (OSTI)

Prepared for the DOE Industrial Technologies Program, this sourcebook contains the practical guidelines and information manufacturers need to improve the efficiency of their pumping systems.

Not Available

2006-05-01T23:59:59.000Z

177

Smart Grid  

Broader source: Energy.gov [DOE]

The Energy Department is investing in strategic partnerships to accelerate the Smart Grid -- a two-way, intuitive system that will result in more efficient and reliable electricity for all grid users.

178

Grid Integration  

Broader source: Energy.gov [DOE]

The Wind Program works with electric grid operators, utilities, regulators, and industry to create new strategies for incorporating increasing amounts of wind energy into the power system while maintaining economic and reliable operation of the grid.

179

High Performance Healthcare Buildings: A Roadmap to Improved Energy Efficiency  

E-Print Network [OSTI]

Efficiency 11-Sept-2009 9. Economic and Organizationaland Organizational Issues 9.1. Strategies to overcome structural challenges to energy efficiencyorganizational scheme to facilitate discussion of challenges to improving energy efficiency

Singer, Brett C.

2010-01-01T23:59:59.000Z

180

Improving Building Energy System Performance by Continuous Commissioning  

E-Print Network [OSTI]

data. The first buildings to undergo a continuous commissioning process were in the Texas LoanSTAR program [Liu, et al, 1994, Claridge, et al, 1994]. These buildings had been retrofitted with various energy efficiency improvements, and measured hourly...

Turner, W. D.; Liu, M.; Claridge, D. E.; Haberl, J. S.

1996-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

Improved performance of railcar/rail truck interface components  

E-Print Network [OSTI]

turning moments around curved track, wear of truck components, and increased detrimental dynamic effects. The recommended improvement of the rail truck interface is a set of two steel inserts, one concave and one convex, that can be retrofit to center...

Story, Brett Alan

2009-05-15T23:59:59.000Z

182

High Performance Healthcare Buildings: A Roadmap to Improved Energy Efficiency  

E-Print Network [OSTI]

Integrated design, incorporation of models from other advanced buildingsand building operators. Communication with users through integrated designintegrated design process has great potential to advance cost-effective reductions in energy intensity – often while improving building

Singer, Brett C.

2010-01-01T23:59:59.000Z

183

J.R. Simplot: Burner Upgrade Project Improves Performance and...  

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

Company saved energy and money by increasing the efficiency of the steam system in its potato processing plant in Caldwell, Idaho. J.R. Simplot: Burner Upgrade Project Improves...

184

Performance Predictions and Topology Improvements for Optical Serrodyne Comb Generators  

Science Journals Connector (OSTI)

Detailed simulations identify which optical components affect the performance of a radio frequency (RF) and optical comb generator based on an optical loop with a phase modulator. The...

Lowery, Arthur

2005-01-01T23:59:59.000Z

185

On adaptive grid computations of variable stars  

SciTech Connect (OSTI)

We show that the use of an implicit adaptive-grid technique is an efficient and up-to-date approach for the calculations of radial oscillations in variable stars. We chose as an illustrative example the radiative envelope of an RR Lyrae variable. For the hydrostatic initial model we compare the Lagrangean ratioed zoning with an adaptive-grid rezoning. We show that the adaptive-grid yields an optimal distribution of the mesh points in the sense that the relevant physical features, the H{minus} and He 1{minus}, He 2{minus} ionization zones, are well resolved. For the hydrodynamical evolution we present the full-amplitude model for both the Lagrangean and adaptive-grid computations. We perform a detailed comparison and show that the adaptive-grid method yields limit cycle solutions that are substantially improved over the Lagrangean grid model. This is due to the fact that the Lagrangean mesh sweeps through the ionization zones twice during one oscillation period, whereas the adaptive-mesh resolves them and tracks them continuously. The results are, in particular, smooth radial velocity and light curves. Beyond a physically better defined solution we also observe larger time steps for the convergence towards the limit cycle and for the evolution during one period. 12 refs., 13 figs., 5 tabs.

Cox, A.N.; Deupree, R.G.; Gehmeyr, M.

1991-01-01T23:59:59.000Z

186

Analyzing and Improving MPI Communication Performance in Overcommitted Virtualized Systems  

Science Journals Connector (OSTI)

Nowadays, it is an important trend in the system domain to use the software-based virtualization technology to build the execution environments (e.g., Clouds) and serve high performance computing (HPC) applications. However, with the extra virtualization ... Keywords: virtualization, cloud, MPI, performance

Zhiyuan Shao; Qiang Wang; Xuejiao Xie; Hai Jin; Ligang He

2011-07-01T23:59:59.000Z

187

A New Approach in Urea Dosing to Improve Performance and Durability...  

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

Approach in Urea Dosing to Improve Performance and Durability of SCR Systems for the Use in Off-Road Applications to Fulfill Tier 4 Final A New Approach in Urea Dosing to Improve...

188

Performance Engineering: Understanding and Improving the Performance of Large-Scale Codes  

E-Print Network [OSTI]

Journal of High Performance Computing Applications, vol.component of the high-performance computing world. This isJournal of High Performance Computing Applications, vol.

2008-01-01T23:59:59.000Z

189

Improving Process Heating System Performance: A Sourcebook for Industry, Second Edition  

Broader source: Energy.gov [DOE]

This sourcebook describes basic process heating applications and equipment, and outlines opportunities for energy and performance improvements. It also discusses the merits of using a systems approach in identifying and implementing these improvement opportunities. It is not intended to be a comprehensive technical text on improving process heating systems, but serves to raise awareness of potential performance improvement opportunities, provides practical guidelines, and offers suggestions on where to find additional help.

190

Security and privacy in demand response systems in smart grid.  

E-Print Network [OSTI]

??Demand response programs are used in smart grid to improve stability of the electric grid and to reduce consumption of electricity and costs during peak… (more)

Paranjpe, Mithila

2011-01-01T23:59:59.000Z

191

Free Flow Power Partners to Improve Hydrokinetic Turbine Performance...  

Office of Environmental Management (EM)

as the device performed as expected, with no discernible harm to river-dwelling fish. Free Flow has also completed preliminary designs of utility-scale installations at a...

192

The Emergence of Trade Associations as Agents of Environmental Performance Improvement  

E-Print Network [OSTI]

This paper explores a surprising phenomenon: the emergence of trade associations as agents of environmental performance improvement. Trade associations in the United States have historically fought environmental regulation, ...

Nash, Jennifer

2002-08-26T23:59:59.000Z

193

Improvement of Electrocatalyst Performance in Hydrogen Fuel Cells by Multiscale Modelling.  

E-Print Network [OSTI]

??The work in this thesis addresses the improvement of electrocatalyst performance inhydrogen PEM fuel cells. An agglomerate model for a catalyst layer was coupled witha… (more)

Marthosa, Sutida

2012-01-01T23:59:59.000Z

194

High Performance Healthcare Buildings: A Roadmap to Improved Energy Efficiency  

SciTech Connect (OSTI)

This document presents a road map for improving the energy efficiency of hospitals and other healthcare facilities. The report compiles input from a broad array of experts in healthcare facility design and operations. The initial section lists challenges and barriers to efficiency improvements in healthcare. Opportunities are organized around the following ten themes: understanding and benchmarking energy use; best practices and training; codes and standards; improved utilization of existing HVAC designs and technology; innovation in HVAC design and technology; electrical system design; lighting; medical equipment and process loads; economic and organizational issues; and the design of next generation sustainable hospitals. Achieving energy efficiency will require a broad set of activities including research, development, deployment, demonstration, training, etc., organized around 48 specific objectives. Specific activities are prioritized in consideration of potential impact, likelihood of near- or mid-term feasibility and anticipated cost-effectiveness. This document is intended to be broad in consideration though not exhaustive. Opportunities and needs are identified and described with the goal of focusing efforts and resources.

Singer, Brett C.; Tschudi, William F.

2009-09-08T23:59:59.000Z

195

This paper appeared in Proc. IEEE/ACM 6th Int'l Symp. Cluster Computing and the Grid (CCGrid), 2nd Int'l Workshop on Cluster Security, May 2006.  

E-Print Network [OSTI]

for data grids are inadequate to meet the security needs of data- intensive applications. To remedy improves security and performance over two existing scheduling algorithms. 1. Introduction A grid on security for applications running on grids [4][5][10]. Our proposed scheduling scheme for security

Qin, Xiao

196

Improving Indoor Air Quality Improves the Performance of Office Work and School Work  

E-Print Network [OSTI]

-10-15a Proceedings of the Eighth International Conference for Enhanced Building Operations, Berlin, Germany, October 20-22, 2008 Definitions #0;? Performance: ability of an individual to perform different mentally and/or physically demanding tasks... Building Operations, Berlin, Germany, October 20-22, 2008 Performance vs productivity #0;? #0;? Effect on individual performance of reading: reduced by 10% Effect on overall productivity: reduced by only 5% if reading speed critical for 50...

Wargocki, P.

197

Efficient materialization of dynamic web data to improve web performance  

Science Journals Connector (OSTI)

The issues of performance, response efficiency and data consistency are among the most important ones for data intensive Web sites on the Internet today. In order to deal with these issues we analyze and evaluate a materialization policy that may be ...

Christos Bouras; Agisilaos Konidaris

2002-08-01T23:59:59.000Z

198

Improving cryogenic deuterium–tritium implosion performance on OMEGA  

SciTech Connect (OSTI)

A flexible direct-drive target platform is used to implode cryogenic deuterium–tritium (DT) capsules on the OMEGA laser [Boehly et al., Opt. Commun. 133, 495 (1997)]. The goal of these experiments is to demonstrate ignition hydrodynamically equivalent performance where the laser drive intensity, the implosion velocity, the fuel adiabat, and the in-flight aspect ratio (IFAR) are the same as those for a 1.5-MJ target [Goncharov et al., Phys. Rev. Lett. 104, 165001 (2010)] designed to ignite on the National Ignition Facility [Hogan et al., Nucl. Fusion 41, 567 (2001)]. The results from a series of 29 cryogenic DT implosions are presented. The implosions were designed to span a broad region of design space to study target performance as a function of shell stability (adiabat) and implosion velocity. Ablation-front perturbation growth appears to limit target performance at high implosion velocities. Target outer-surface defects associated with contaminant gases in the DT fuel are identified as the dominant perturbation source at the ablation surface; performance degradation is confirmed by 2D hydrodynamic simulations that include these defects. A trend in the value of the Lawson criterion [Betti et al., Phys. Plasmas 17, 058102 (2010)] for each of the implosions in adiabat–IFAR space suggests the existence of a stability boundary that leads to ablator mixing into the hot spot for the most ignition-equivalent designs.

Sangster, T. C.; Goncharov, V. N.; Betti, R.; Radha, P. B.; Boehly, T. R.; Collins, T. J. B.; Craxton, R. S.; Delettrez, J. A.; Edgell, D. H.; Epstein, R.; Forrest, C. J.; Froula, D. H.; Glebov, Y. Yu.; Harding, D. R.; Hohenberger, M.; Hu, S. X.; Igumenshchev, I. V.; Janezic, R.; Kelly, J. H.; Kessler, T. J. [Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623 (United States)] [Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623 (United States); and others

2013-05-15T23:59:59.000Z

199

Improvement in Plasma Performance with Lithium Coatings in NSTX  

SciTech Connect (OSTI)

Lithium as a plasma-facing material has attractive features, including a reduction in the recycling of hydrogenic species and the potential for withstanding high heat and neutron fluxes in fusion reactors. Dramatic effects on plasma performance with lithium-coated plasma-facing components (PFCOs) have been demonstrated on many fusion devices, including TFTR, [1] T-11M, [2] and FT-U. [3] Using a liquid-lithium-filled tray as a limiter, the CDX-U device achieved very significant enhancement in the confinement time of ohmically heated plasmas. [4] The recent NSTX experiments reported here have demonstrated, for the first time, significant and recurring benefits of lithium PFC coatings on divertor plasma performance in both L- and H- mode regimes heated by neutral beams.

Kaita, R; Ahn, J -W; Allain, J P; Bell, M G; Bell, R; Boedo, J; Bush, C; Mansfield, D; Menard, J; Mueller, D; Ono, M; Paul, S; Raman, R; Roquemore, A L; Ross, P W; Sabbagh, S; Schneider, H; Skinner, C H; Soukhanovskii, V; Stevenson, T; Stotler, D; Timberlake, J; Wampler, W R; Wilgen, J B

2008-09-12T23:59:59.000Z

200

Improvement in Plasma Performance with Lithium Coatings in NSTX  

SciTech Connect (OSTI)

Lithium as a plasma-facing material has attractive features, including a reduction in the recycling of hydrogenic species and the potential for withstanding high heat and neutron fluxes in fusion reactors. Dramatic effects on plasma performance with lithium-coated plasma-facing components (PFC's) have been demonstrated on many fusion devices, including TFTR, T-11M, and FT-U. Using a liquid-lithium-filled tray as a limiter, the CDX-U device achieved very significant enhancement in the confinement time of ohmically heated plasmas. The recent NSTX experiments reported here have demonstrated, for the first time, significant and recurring benefits of lithium PFC coatings on divertor plasma performance in both L- and H- mode regimes heated by neutral beams.

Kaita, R

2009-02-17T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

Final report for %22High performance computing for advanced national electric power grid modeling and integration of solar generation resources%22, LDRD Project No. 149016.  

SciTech Connect (OSTI)

Design and operation of the electric power grid (EPG) relies heavily on computational models. High-fidelity, full-order models are used to study transient phenomena on only a small part of the network. Reduced-order dynamic and power flow models are used when analysis involving thousands of nodes are required due to the computational demands when simulating large numbers of nodes. The level of complexity of the future EPG will dramatically increase due to large-scale deployment of variable renewable generation, active load and distributed generation resources, adaptive protection and control systems, and price-responsive demand. High-fidelity modeling of this future grid will require significant advances in coupled, multi-scale tools and their use on high performance computing (HPC) platforms. This LDRD report demonstrates SNL's capability to apply HPC resources to these 3 tasks: (1) High-fidelity, large-scale modeling of power system dynamics; (2) Statistical assessment of grid security via Monte-Carlo simulations of cyber attacks; and (3) Development of models to predict variability of solar resources at locations where little or no ground-based measurements are available.

Reno, Matthew J.; Riehm, Andrew Charles; Hoekstra, Robert John; Munoz-Ramirez, Karina; Stamp, Jason Edwin; Phillips, Laurence R.; Adams, Brian M.; Russo, Thomas V.; Oldfield, Ron A.; McLendon, William Clarence, III; Nelson, Jeffrey Scott; Hansen, Clifford W.; Richardson, Bryan T.; Stein, Joshua S.; Schoenwald, David Alan; Wolfenbarger, Paul R.

2011-02-01T23:59:59.000Z

202

APPLICATION OF IT AND INTERNATIONAL STANDARDS TO IMPROVE BUILDING ENVELOPE PERFORMANCE  

E-Print Network [OSTI]

, Quebec, Canada ABSTRACT Improving thermal performance of building envelopes reduces energy consumption to be introduced to provide the required fresh air to the occupants. In other words, the energy performance must, thermal performance, indoor air quality, structural stability, acoustic performance, fire control, etc

Hammad, Amin

203

Lithium Surface Coatings for Improved Plasma Performance in NSTX  

SciTech Connect (OSTI)

NSTX high-power divertor plasma experiments have shown, for the first time, significant and frequent benefits from lithium coatings applied to plasma facing components. Lithium pellet injection on NSTX introduced lithium pellets with masses 1 to 5 mg via He discharges. Lithium coatings have also been applied with an oven that directed a collimated stream of lithium vapor toward the graphite tiles of the lower center stack and divertor. Lithium depositions from a few mg to 1 g have been applied between discharges. Benefits from the lithium coating were sometimes, but not always seen. These improvements sometimes included decreases plasma density, inductive flux consumption, and ELM frequency, and increases in electron temperature, ion temperature, energy confinement and periods of MHD quiescence. In addition, reductions in lower divertor D, C, and O luminosity were measured.

Kugel, H W; Ahn, J -W; Allain, J P; Bell, R; Boedo, J; Bush, C; Gates, D; Gray, T; Kaye, S; Kaita, R; LeBlanc, B; Maingi, R; Majeski, R; Mansfield, D; Menard, J; Mueller, D; Ono, M; Paul, S; Raman, R; Roquemore, A L; Ross, P W; Sabbagh, S; Schneider, H; Skinner, C H; Soukhanovskii, V; Stevenson, T; Timberlake, J; Wampler, W R

2008-02-19T23:59:59.000Z

204

Wave Motion 33 (2001) 225243 Boussinesq-type equations with improved nonlinear performance  

E-Print Network [OSTI]

Wave Motion 33 (2001) 225­243 Boussinesq-type equations with improved nonlinear performance Andrew In this paper, we derive and test a set of extended Boussinesq equations with improved nonlinear performance Elsevier Science B.V. All rights reserved. Keywords: Boussinesq equations; Water waves; Numerical methods

Kirby, James T.

205

Development of an improved performance SiGe unicouple  

SciTech Connect (OSTI)

A two-step diffusion bonding process was developed such that the p-type material is bonded to the SiMo hot shoe first at 1594 K followed by the lower melting point n-type material between 1518 and 1520 K. Standard procedures were used to silicon nitride coat the thermoelectric pellets and to attach the cold side CTE transition and heat rejection components to produce unicouples. Two unicouples successfully withstood simulated rivet operations as would be experienced in the fabrication of a Radioisotope Thermoelectric Generator (RTG) converter to verify the integrity of the tungsten cold shoe to thermoelectric material interface. The performance of these unicouples will be further evaluated in an 18-couple test module. {copyright}American Institute of Physics 1995

Nakahara, J.F.; Franklin, B.; DeFillipo, L.E. [Martin Marietta Astro Space, PO Box 8555, Room 29B12, Philadelphia, Pennsylvania 19101-8555 (United States)

1995-01-20T23:59:59.000Z

206

Smart Grid: Network simulator for smart grid test-bed  

Science Journals Connector (OSTI)

Smart Grid become more popular, a smaller scale of smart grid test-bed is set up at UNITEN to investigate the performance and to find out future enhancement of smart grid in Malaysia. The fundamental requirement in this project is design a network with low delay, no packet drop and with high data rate. Different type of traffic has its own characteristic and is suitable for different type of network and requirement. However no one understands the natural of traffic in smart grid. This paper presents the comparison between different types of traffic to find out the most suitable traffic for the optimal network performance.

L C Lai; H S Ong; Y X Che; N Q Do; X J Ong

2013-01-01T23:59:59.000Z

207

Constructing the ASCI computational grid  

SciTech Connect (OSTI)

The Accelerated Strategic Computing Initiative (ASCI) computational grid is being constructed to interconnect the high performance computing resources of the nuclear weapons complex. The grid will simplify access to the diverse computing, storage, network, and visualization resources, and will enable the coordinated use of shared resources regardless of location. To match existing hardware platforms, required security services, and current simulation practices, the Globus MetaComputing Toolkit was selected to provide core grid services. The ASCI grid extends Globus functionality by operating as an independent grid, incorporating Kerberos-based security, interfacing to Sandia's Cplant{trademark},and extending job monitoring services. To fully meet ASCI's needs, the architecture layers distributed work management and criteria-driven resource selection services on top of Globus. These services simplify the grid interface by allowing users to simply request ''run code X anywhere''. This paper describes the initial design and prototype of the ASCI grid.

BEIRIGER,JUDY I.; BIVENS,HUGH P.; HUMPHREYS,STEVEN L.; JOHNSON,WILBUR R.; RHEA,RONALD E.

2000-06-01T23:59:59.000Z

208

Optimization Online - An Exact Algorithm for Power Grid Interdiction ...  

E-Print Network [OSTI]

Jan 10, 2012 ... Abstract: Power grid vulnerability analysis is often performed through solving a bi

Long Zhao

2012-01-10T23:59:59.000Z

209

Technetium and Iodine Getters to Improve Cast Stone Performance  

SciTech Connect (OSTI)

To determine the effectiveness of the various getter materials prior to their solidification in Cast Stone, a series of batch sorption experiments was performed at Pacific Northwest National Laboratory. To quantify the effectiveness of the removal of Tc(VII) and I(I) from solution by getters, the distribution coefficient, Kd (mL/g), was calculated. Testing involved placing getter material in contact with spiked waste solutions at a 1:100 solid-to-solution ratio for periods up to 45 days with periodic solution sampling. One Tc getter was also tested at a 1:10 solid-to-solution ratio. Two different solution media, 18.2 M? deionized water (DI H2O) and a 7.8 M Na LAW simulant, were used in the batch sorption tests. Each test was conducted at room temperature in an anoxic chamber containing N2 with a small amount of H2 (0.7%) to maintain anoxic conditions. Each getter-solution combination was run in duplicate. Three Tc- and I-doping concentrations were used separately in aliquots of both the 18.2 M? DI H2O and a 7.8 M Na LAW waste simulant. The 1× concentration was developed based on Hanford Tank Waste Operations Simulator (HTWOS) model runs to support the River Protection Project System Plan Revision 6. The other two concentrations were 5× and 10× of the HTWOS values. The Tc and I tests were run separately (i.e., the solutions did not contain both solutes). Sampling of the solid-solution mixtures occurred nominally after 0.2, 1, 3, 6, 9, 12, 15 days and ~35 to 45 days. Seven getter materials were tested for Tc and five materials were tested for I. The seven Tc getters were blast furnace slag 1 (BFS1) (northwest source), BFS2 (southeast source), Sn(II)-treated apatite, Sn(II) chloride, nano tin phosphate, KMS (a potassium-metal-sulfide), and tin hydroxapatite. The five iodine getters were layered bismuth hydroxide (LBH), argentite mineral, synthetic argentite, silver-treated carbon, and silver-treated zeolite. The Tc Kd values measured from experiments conducted using the 7.8 M Na LAW simulant (the simulant selected to represent LAW) for the first 15 days for four Tc getters (BFS1, BFS2, Sn(II)-treated apatite, and Sn(II) chloride) show no, to a very small, capacity to remove Tc from the LAW simulant. For the Tc-getter experiments in the 7.8 M LAW simulant, the majority of the effluent samples show very small drops in Tc concentrations for the 35-day compared to the 15-day samplings. However, the Tc concentration in the simulant blanks also dropped slightly during this period, so the effect of the getter contacting LAW simulant at 35 days compared to 15 days is minimal; except that the BFS1 1:10 test shows a slow but steady decrease in Tc concentration in the LAW simulant supernatant from the beginning to the 35 day contact at which point about 20% of the original Tc has been removed from solution. Lastly, the KMS getter gives the highest Kd value for Tc at 35 days where Kd values have increased to 104 mL/g. When considering the different I getters reacting with the 7.8 M LAW simulant, two getters are much more effective than the others: Ag zeolite and Syn Arg. The other getters have calculated iodide distribution coefficients that show very limited effectiveness in the caustic conditions created by the LAW simulant. These are preliminary results that will need more detailed analyses including both pre- and post-batch sorption getter solid-phase characterization using state-of-the-art instrumentation such as synchrotron X ray absorption spectroscopy, which can delineate the oxidation state of the Tc and likely iodine species as well as some of the getters key major components, sulfur and iron in the BFS, and tin and sulfur in the tin-bearing and sulfur-bearing getters. This report also describes future experimental studies to be performed to better elucidate the mechanisms controlling the Tc and I sequestration processes in the various getters and leach tests of getter-bearing Cast Stone monoliths.

Qafoku, Nikolla; Neeway, James J.; Lawter, Amanda R.; Levitskaia, Tatiana G.; Serne, R. Jeffrey; Westsik, Joseph H.; Snyder, Michelle MV

2014-07-01T23:59:59.000Z

210

ILC-TCP: An Interlayer Collaboration Protocol for TCP Performance Improvement in Mobile and Wireless  

E-Print Network [OSTI]

Internet has led to the optimization of network protocols to provide for a better performance. Most of the Internet traffic uses TCP, the de- facto transport layer protocol. Unfortunately, TCP performance degrades in the mobile and wireless environments. A good amount of research has been attempted to improve its performance

Helal, Abdelsalam

211

Smart Grid: Powering Our Way to a Greener Future | Department of Energy  

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

Grid: Powering Our Way to a Greener Future Grid: Powering Our Way to a Greener Future Smart Grid: Powering Our Way to a Greener Future April 25, 2013 - 9:28am Addthis Eric Lightner Eric Lightner Director of the Federal Smart Grid Task Force in the Office of Electricity Delivery and Energy Reliability Learning how to be smarter and more efficient about reducing our energy consumption is on the minds of everyone this week. The smart grid, with its improved efficiency and performance, is helping consumers conserve energy and save money every day. To take full advantage of a modern electric grid, however, people need to understand what those opportunities are. The "Power Over Energy" energy literacy initiative, which the Department joined this week, is educating, motivating and empowering

212

Smart Grid | Department of Energy  

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

Grid Grid Smart Grid Smart Grid "Smart grid" generally refers to a class of technology people are using to bring utility electricity delivery systems into the 21st century, using computer-based remote control and automation. These systems are made possible by two-way communication technology and computer processing that has been used for decades in other industries. They are beginning to be used on electricity networks, from the power plants and wind farms all the way to the consumers of electricity in homes and businesses. They offer many benefits to utilities and consumers -- mostly seen in big improvements in energy efficiency on the electricity grid and in the energy users' homes and offices. For a century, utility companies have had to send workers out to gather

213

A Grid Security Infrastructure Based on Behaviors and Trusts  

Science Journals Connector (OSTI)

Computational Grids need support the distributed high performance computing with security and reliability. While the fact is when ... destroy the whole system. For solving these security problems in Grids, a Grid

Xiaolin Gui; Bing Xie; Yinan Li; Depei Qian

2004-01-01T23:59:59.000Z

214

TCP/IP Security Protocol Suite for Grid Computing Architecture  

Science Journals Connector (OSTI)

Grid computing is a term referring to the ... domains to attain a common goal. The grid can be thought of as a distributed ... paper, we propose a solution for various security issues found in High Performance Grid

Vikas Kamra; Amit Chugh

2011-01-01T23:59:59.000Z

215

Fact Sheet: Community Energy Storage for Grid Support (October 2012) |  

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

Fact Sheet: Community Energy Storage for Grid Support (October Fact Sheet: Community Energy Storage for Grid Support (October 2012) Fact Sheet: Community Energy Storage for Grid Support (October 2012) Detroit Edison (DTE) will design, build, and demonstrate Community Energy Storage (CES) systems in their service territory. The CES is designed to improve electricity service to customers whose circuits are often heavily loaded and would benefit from the power conditioning advantages provided from a CES. The performance data of the CES units and control systems will be analyzed under real-world operating conditions to standardize design, installation, and use across the U.S. Fact Sheet: Community Energy Storage for Grid Support (October 2012) More Documents & Publications New Reports and Other Materials Energy Storage Systems 2012 Peer Review Presentations - Poster Session 2

216

Fact Sheet: Community Energy Storage for Grid Support (October 2012) |  

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

Community Energy Storage for Grid Support (October Community Energy Storage for Grid Support (October 2012) Fact Sheet: Community Energy Storage for Grid Support (October 2012) Detroit Edison (DTE) will design, build, and demonstrate Community Energy Storage (CES) systems in their service territory. The CES is designed to improve electricity service to customers whose circuits are often heavily loaded and would benefit from the power conditioning advantages provided from a CES. The performance data of the CES units and control systems will be analyzed under real-world operating conditions to standardize design, installation, and use across the U.S. Fact Sheet: Community Energy Storage for Grid Support (October 2012) More Documents & Publications New Reports and Other Materials Energy Storage Systems 2012 Peer Review Presentations - Poster Session 2

217

Integrated Approach Towards the Application of Horizontal Wells to Improve Waterflooding Performance  

SciTech Connect (OSTI)

This final report describes the progress during the six year of the project on ''Integrated Approach Towards the Application of Horizontal Wells to Improve Waterflooding Performance.'' This report is funded under the Department of Energy's (DOE's) Class I program which is targeted towards improving the reservoir performance of mature oil fields located in fluvially-dominated deltaic deposits. The project involves using an integrated approach to characterize the reservoir followed by drilling of horizontal injection wells to improve production performance. The project was divided into two budget periods. In the first budget period, many modern technologies were used to develop a detailed reservoir management plan; whereas, in the second budget period, conventional data was used to develop a reservoir management plan. The idea was to determine the cost effectiveness of various technologies in improving the performance of mature oil fields.

Kelkar, Mohan; Liner, Chris; Kerr, Dennis

1999-10-15T23:59:59.000Z

218

Using FEC Code for Improving the WDM/SCM - PON Performance  

Science Journals Connector (OSTI)

Using FEC Code for Improving the WDM/SCM - PON PerformanceDong-Min Seol, Seung-Hyun Jang, Chul-Soo Lee, Eui-Suk Jung, Byoung-Whi KimElectronics and Telecommunications Research...

Seol, Dong-Min; Lee, Chul-Soo; Jang, Seung-Hyun; Jung, Eui-Suk; Kim, Byoung-Whi

219

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

E-Print Network [OSTI]

. Existing research separately addresses server performance and power conservation. The locality-aware request distribution (LARD) scheme improves the system response time by having the requests served by web servers which have the data in their cache...

Vageesan, Gopinath

2007-04-25T23:59:59.000Z

220

EASURING IMPROVEMENT IN THE ENERGY PERFORMANCE OF THE U.S. CORN REFINING INDUSTRY  

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

| P | P a g e MEASURING IMPROVEMENT IN THE ENERGY PERFORMANCE OF THE U.S. CORN REFINING INDUSTRY SPONSORED BY THE U.S. ENVIRONMENTAL PROTECTION AGENCY AS PART OF THE ENERGY STAR® PROGRAM GALE A. BOYD AND CHRISTIAN DELGADO DUKE UNIVERSITY DEPARTMENT OF ECONOMICS BOX 90097, DURHAM, NC 27708 JULY 10, 2012 2 | P a g e MEASURING IMPROVEMENT IN THE ENERGY PERFORMANCE OF THE U.S. CORN REFINING INDUSTRY CONTENTS Figures .................................................................................................................................................................................................................. 3 Tables ................................................................................................................................................................................................................... 3

Note: This page contains sample records for the topic "improve grid performance" 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

2012 ARPA-E Energy Innovation Summit: Profiling City University of New York (CUNY): Reinventing Batteries for Grid Storage (Performer Video)  

ScienceCinema (OSTI)

The third annual ARPA-E Energy Innovation Summit was held in Washington D.C. in February, 2012. The event brought together key players from across the energy ecosystem - researchers, entrepreneurs, investors, corporate executives, and government officials - to share ideas for developing and deploying the next generation of energy technologies. A few videos were selected for showing during the Summit to attendees. These 'performer videos' highlight innovative research that is ongoing and related to the main topics of the Summit's sessions. Featured in this video are Sanjoy Banerjee, Director of CUNY Energy Institute and Dan Steingart (Assistant Professor of Chemical Engineering, CUNY). The City University of New York's Energy Institute, with the help of ARPA-E funding, is creating safe, low cost, rechargeable, long lifecycle batteries that could be used as modular distributed storage for the electrical grid. The batteries could be used at the building level or the utility level to offer benefits such as capture of renewable energy, peak shaving and microgridding, for a safer, cheaper, and more secure electrical grid.

None Available

2012-03-21T23:59:59.000Z

222

Synchrony-optimized power grids  

E-Print Network [OSTI]

We investigate synchronization in power grids, which we assume to be modeled by a network of Kuramoto oscillators with inertia. More specifically, we study the optimization of the power grid topology to favor the network synchronization. We introduce a rewiring algorithm which consists basically in a hill climb scheme where the edges of the network are swapped in order enhance the main measures of synchronization. As a byproduct of the optimization algorithm, we typically have also the anticipation of the synchronization onset for the optimized network. We perform several robustness tests for the synchrony-optimized power grids, including the impact of consumption peaks. In our analyses, we investigate synthetic random networks, which we consider as hypothetical decentralized power generation situations, and also a network based in the actual power grid of Spain, which corresponds to the current paradigm of centralized power grids. The synchrony-optimized power grids obtained by our algorithm have some intere...

Pinto, Rafael S

2014-01-01T23:59:59.000Z

223

The Green Grid | Open Energy Information  

Open Energy Info (EERE)

The Green Grid Place: Oregon Zip: 97006 Sector: Efficiency Product: Oregan-based consortium that seeks to improve energy efficiency in data centers and business computing...

224

Improved  

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

Improved Improved cache performance in Monte Carlo transport calculations using energy banding A. Siegel a , K. Smith b , K. Felker c,∗ , P . Romano b , B. Forget b , P . Beckman c a Argonne National Laboratory, Theory and Computing Sciences and Nuclear Engineering Division b Massachusetts Institute of Technology, Department of Nuclear Science and Engineering c Argonne National Laboratory, Theory and Computing Sciences Abstract We present an energy banding algorithm for Monte Carlo (MC) neutral parti- cle transport simulations which depend on large cross section lookup tables. In MC codes, read-only cross section data tables are accessed frequently, ex- hibit poor locality, and are typically much too large to fit in fast memory. Thus, performance is often limited by long latencies to RAM, or by off-node communication latencies when the data footprint is very large and must be decomposed on

225

Value of a Smart Grid System | Department of Energy  

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

Value of a Smart Grid System Value of a Smart Grid System A broad range of industries have embraced technology in their quest to improve productivity, reduce costs and improve...

226

NREL study may provide future guidance in improving CdS/CdTe photovoltaic device performance.  

E-Print Network [OSTI]

NREL study may provide future guidance in improving CdS/CdTe photovoltaic device performance. The majority of minority carrier lifetime (MCL) studies performed on CdS/CdTe photovoltaic (PV) devices have Carrier Lifetime Measurements in Superstrate and Substrate CdTe PV Devices." Proc. 37th IEEE Photovoltaic

227

Endpoint-Based Routing Strategies for Improving Internet Performance and Resilience  

E-Print Network [OSTI]

to guarantee good end-to-end performance in the future Internet. We believe that the contributionsEndpoint-Based Routing Strategies for Improving Internet Performance and Resilience Aditya Akella, of any sponsoring institution, the U.S. government or any other entity. #12;Keywords: Internet routing

228

EndpointBased Routing Strategies for Improving Internet Performance and Resilience  

E-Print Network [OSTI]

to guarantee good end­to­end performance in the future Internet. We believe that the contributionsEndpoint­Based Routing Strategies for Improving Internet Performance and Resilience Aditya Akella, of any sponsoring institution, the U.S. government or any other entity. #12; Keywords: Internet routing

Akella, Aditya

229

BLACK-BOX MODELLING OF HVAC SYSTEM: IMPROVING THE PERFORMANCES OF NEURAL NETWORKS  

E-Print Network [OSTI]

BLACK-BOX MODELLING OF HVAC SYSTEM: IMPROVING THE PERFORMANCES OF NEURAL NETWORKS Eric FOCK Ile de La Réunion - FRANCE ABSTRACT This paper deals with neural networks modelling of HVAC systems of HVAC system can be modelled using manufacturer design data presented as derived performance maps

Boyer, Edmond

230

(MS WORD TEMPLATE for Submission in Fusion Engineering and Design) Security on the US Fusion Grid  

E-Print Network [OSTI]

(MS WORD TEMPLATE for Submission in Fusion Engineering and Design) Security on the US Fusion Grid J, FusionGrid, grid computing 1. Introduction Critical to the success of any computational grid is security to improve security for the US Fusion Grid (FusionGrid) [1]. Collaboratory workers have adapted secure

Thompson, Mary R.

231

Microsoft Word - LL-White Paper Prac_Improve_Perform.doc  

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

LM/GJ1156-2006 LM/GJ1156-2006 ESL-RPT-2006-02 White Paper Sustainable Disposal Cell Covers: Legacy Management Practices, Improvements, and Long-Term Performance March 2006 Work Performed by S.M. Stoller Corporation under DOE Contract No. DE-AC01-02GJ79491 for the U.S. Department of Energy Office of Legacy Management, Grand Junction, Colorado U.S. Department of Energy Sustainable Disposal Cell Covers: LM Practices, Improvements, and Long-Term Performance March 2006 Doc. No. S0224000 Page iii Signature Page Sustainable Disposal Cell Covers: Legacy Management Practices, Improvements, and Long-Term Performance March 2006 Prepared By: ____________________________________________________ Jody Waugh

232

Smart Grid Integration Laboratory  

SciTech Connect (OSTI)

The initial federal funding for the Colorado State University Smart Grid Integration Laboratory is through a Congressionally Directed Project (CDP), DE-OE0000070 Smart Grid Integration Laboratory. The original program requested in three one-year increments for staff acquisition, curriculum development, and instrumentation â?? all which will benefit the Laboratory. This report focuses on the initial phase of staff acquisition which was directed and administered by DOE NETL/ West Virginia under Project Officer Tom George. Using this CDP funding, we have developed the leadership and intellectual capacity for the SGIC. This was accomplished by investing (hiring) a core team of Smart Grid Systems engineering faculty focused on education, research, and innovation of a secure and smart grid infrastructure. The Smart Grid Integration Laboratory will be housed with the separately funded Integrid Laboratory as part of CSUâ??s overall Smart Grid Integration Center (SGIC). The period of performance of this grant was 10/1/2009 to 9/30/2011 which included one no cost extension due to time delays in faculty hiring. The Smart Grid Integration Laboratoryâ??s focus is to build foundations to help graduate and undergraduates acquire systems engineering knowledge; conduct innovative research; and team externally with grid smart organizations. Using the results of the separately funded Smart Grid Workforce Education Workshop (May 2009) sponsored by the City of Fort Collins, Northern Colorado Clean Energy Cluster, Colorado State University Continuing Education, Spirae, and Siemens has been used to guide the hiring of faculty, program curriculum and education plan. This project develops faculty leaders with the intellectual capacity to inspire its students to become leaders that substantially contribute to the development and maintenance of Smart Grid infrastructure through topics such as: (1) Distributed energy systems modeling and control; (2) Energy and power conversion; (3) Simulation of electrical power distribution system that integrates significant quantities of renewable and distributed energy resources; (4) System dynamic modeling that considers end-user behavior, economics, security and regulatory frameworks; (5) Best practices for energy management IT control solutions for effective distributed energy integration (including security with the underlying physical power systems); (6) Experimental verification of effects of various arrangements of renewable generation, distributed generation and user load types along with conventional generation and transmission. Understanding the core technologies for enabling them to be used in an integrated fashion within a distribution network remains is a benefit to the future energy paradigm and future and present energy engineers.

Wade Troxell

2011-09-30T23:59:59.000Z

233

Industrial Decision Making- Improving Petroleum Refining Performance through Better Economic Performance Analysis  

E-Print Network [OSTI]

for Performance Making product from crude oil is a very much more complicated process than the foregoing simple example cited. One of the major complications results from the fact that when making salable product by converting crude oil, the results produce a... volumetric gain. That is, for every 100 barrels of crude oil processed, the outtum may be 110 or 115 equivalent barrels of products ( see figure 1). This looks too good to be true! The reason this anomaly occurs is that in the conversion of crude oil...

Mergens, E. H.

234

Integrated approach towards the application of horizontal wells to improve waterflooding performance. Annual report  

SciTech Connect (OSTI)

This annual report describes the progress during the second year of the project on Integrated Approach Towards the Application of Horizontal Wells to Improve Waterflooding Performance. This project is funded under the Department of Energy`s Class I program which is targeted towards improving the reservoir performance of mature oil fields located in fluvial-dominated deltaic deposits. The project involves an integrated approach to characterize the reservoir followed by the drilling of horizontal injection wells to improve production performance. The type of data we have integrated include cross bore hole seismic surveys, geological interpretation based on logs and cores, and engineering information. This report covers the second phase of the project which includes a detailed reservoir description of the field by integrating all the available information, followed by flow simulation of the Self Unit under various operating conditions. Based on an examination of the various operating parameters, we observed that the best possible solution to improve the Self Unit performance is to recomplete and stimulate most of the wells followed by an increase in the water injection rate. Drilling of horizontal injection well, although helpful in improving the performance, was not found to be economically feasible. The proposed reservoir management plan will be implemented shortly.

Kelkar, M.; Liner, C.; Kerr, D.

1995-05-01T23:59:59.000Z

235

Model checking grid security  

Science Journals Connector (OSTI)

Grid computing is one of the leading forms of high performance computing. Security in the grid environment is a challenging issue that can be characterized as a complex system involving many subtleties that may lead designers into error. This is similar to what happens with security protocols where automatic verification techniques (specially model checking) have been proved to be very useful at design time. This paper proposes a formal verification methodology based on model checking that can be applied to host security verification for grid systems. The proposed methodology must take into account that a grid system can be described as a parameterized model, and security requirements can be described as hyperproperties. Unfortunately, both parameterized model checking and hyperproperty verification are, in general, undecidable. However, it has been proved that this problem becomes decidable when jobs have some regularities in their organization. Therefore, this paper presents a verification methodology that reduces a given grid system model to a model to which it is possible to apply a “cutoff” theorem (i.e., a requirement is satisfied by a system with an arbitrary number of jobs if and only if it is satisfied by a system with a finite number of jobs up to a cutoff size). This methodology is supported by a set of theorems, whose proofs are presented in this paper. The methodology is explained by means of a case study: the Condor system.

F. Pagliarecci; L. Spalazzi; F. Spegni

2013-01-01T23:59:59.000Z

236

Interstate Grid Electrification Improvement Project  

Broader source: Energy.gov [DOE]

2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation

237

Comments on the Request for Information on Improving Performance of Federal  

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

on the Request for Information on Improving Performance of on the Request for Information on Improving Performance of Federal Permitting and Review of Infrastructure Projects Comments on the Request for Information on Improving Performance of Federal Permitting and Review of Infrastructure Projects On August 29, 2013, the U.S. Department of Energy (DOE) published a Request for Information seeking information on a draft Integrated, Interagency Pre-Application (IIP) Process for significant onshore electric transmission projects requiring Federal authorizations. On September 25, the public comment period was extended to October 31, 2013. Comments received are available below. Comments from Lee Cunningham, sent September 23, 2013 Comments from Patrick Ledger of Arizona's G&T Cooperatives, sent September 25, 2013

238

From Coarse Grid to Mini-Grid to Gridless: How Much can Gridless Help Contentionless?  

Science Journals Connector (OSTI)

We study the benefit of gridless wavelength assignment. An efficient spectrum assignment algorithm is developed. It is found a mini-grid case with a certain grid granularity performs...

Shen, Gangxiang; Yang, Qi

239

A 16-ELEMENT REFLECTION GRID AMPLIFIER Frederic Lecuyer1  

E-Print Network [OSTI]

, which can double as a large metal heat sink. Otherwise, the operation of reflection grid amplifiers to improve common- Mirror/Heat Sink Active GridInput Polarizer Active Grid Output Polarizer E Output Beam E Input Beam E Output Beam Differential Transistor Pair E Input Beam Mirror/Heat Sink Active Grid

240

Approach for the Improvement of Energy Performance of a Stock of Buildings  

E-Print Network [OSTI]

. - The tools must be accessible via the Intranet of the ministry in order to be easily and widely accessible. DEVELOPMENT OF TOOLS ADAPTED TO END-USER To analyze and improve the performance of the ministry of equipment stock of buildings we have.... - The tools must be accessible via the Intranet of the ministry in order to be easily and widely accessible. DEVELOPMENT OF TOOLS ADAPTED TO END-USER To analyze and improve the performance of the ministry of equipment stock of buildings we have...

Vaezi-Nejad, H.; Bouillon, J.; Crozier, L.; Guyot, G.

2003-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

A Kerberos security architecture for web services based instrumentation grids  

Science Journals Connector (OSTI)

Instrumentation Grids aim at controlling and managing heterogeneous resources & instruments securely, reliably and in near real-time. Within this context, we present a Web Services based Security Architecture that aims at improving security performance maintaining at the same time interoperability with legacy Grid Security Infrastructure (GSI). Our architecture utilizes GSI X.509 Certificates or Proxy Certificates (RFC3820) for the initial authentication of a user. However, it subsequently maps this identity to a Kerberos one and utilizes WS Security Kerberos Token Profile for embedding user credentials within WS exchange mechanisms. It then provides user authorization, thus realizing a complete AAI (Authentication & Authorization Infrastructure). In order to demonstrate and quantify the performance improvement achieved by our approach over a message exchange using X.509 Certificate Token Profile, we present comparative measurements on implementations of the two options. Our results demonstrate that the Kerberos message exchange schema exhibits up to 50% message throughput improvement, under high CPU load on the server.

Athanasios Moralis; Vassiliki Pouli; Symeon Papavassiliou; Vasilis Maglaris

2009-01-01T23:59:59.000Z

242

A Novel Trigon based Dual Authentication Protocol for Enhancing Security in Grid Environment  

E-Print Network [OSTI]

In recent times, a necessity has been raised in order to distribute computing applications often across grids. These applications are dependent on the services like data transfer or data portal services as well as submission of jobs. Security is of utmost importance in grid computing applications as grid resources are heterogeneous, dynamic, and multidomain. Authentication remains as the significant security challenge in grid environment. In traditional authentication protocol a single server stores the sensitive user credentials, like username and password. When such a server is compromised, a large number of user passwords, will be exposed. Our proposed approach uses a dual authentication protocol in order to improve the authentication service in grid environment. The protocol utilizes the fundamental concepts of trigon and based on the parameters of the trigon the user authentication will be performed. In the proposed protocol, the password is interpreted and alienated into more than one unit and these uni...

Ruckmani, V

2010-01-01T23:59:59.000Z

243

GridStat – Cyber Security and Regional Deployment Project Report  

SciTech Connect (OSTI)

GridStat is a developing communication technology to provide real-time data delivery services to the electric power grid. It is being developed in a collaborative effort between the Electrical Power Engineering and Distributed Computing Science Departments at Washington State University. Improving the cyber security of GridStat was the principle focus of this project. A regional network was established to test GridStat’s cyber security mechanisms in a realistic environment. The network consists of nodes at Pacific Northwest National Laboratory, Idaho National Laboratory, and Washington State University. Idaho National Laboratory (INL) was tasked with performing the security assessment, the results of which detailed a number or easily resolvable and previously unknown issues, as well as a number of difficult and previously known issues. Going forward we recommend additional development prior to commercialization of GridStat. The development plan is structured into three domains: Core Development, Cyber Security and Pilot Projects. Each domain contains a number of phased subtasks that build upon each other to increase the robustness and maturity of GridStat.

Clements, Samuel L.

2009-02-18T23:59:59.000Z

244

Improving DVB-S2 Performance Through Constellation Shaping and Iterative Demapping  

E-Print Network [OSTI]

of increasing average energy and uses a shaping code to select signals from the lower energy sub- constellations more often than the signals from higher energy sub-constellations. Our previous work in [6] on shapingImproving DVB-S2 Performance Through Constellation Shaping and Iterative Demapping Xingyu Xiang

Valenti, Matthew C.

245

USE OF VARIOUS DEVICE GEOMETRIES TO IMPROVE THE PERFORMANCE OF CdTe DETECTORS (*)  

E-Print Network [OSTI]

343 USE OF VARIOUS DEVICE GEOMETRIES TO IMPROVE THE PERFORMANCE OF CdTe DETECTORS (*) K. ZANIO. - The most direct method of increasing the resolution of CdTe gamma ray and x-ray detectors is to increase of Environmental and Biomedical Research. doped CdTe. Devices do not polarize as those having blocking contacts

Paris-Sud XI, Université de

246

Improving the Performance of On-Road Vehicle Detection by Combining Gabor and Wavelet  

E-Print Network [OSTI]

from gray-scale images. A first step of any vehicle detection system is hypothesizing the loca- tions1 Improving the Performance of On-Road Vehicle Detection by Combining Gabor and Wavelet Features to the problem of vehicle detection. These methods learn the characteristics of the vehicle class from a set

Bebis, George

247

Phase-change materials to improve solar panel's performance Pascal Biwole1,2,*  

E-Print Network [OSTI]

-change materials to improve solar panel's performance Pascal Biwole1,2,* , Pierre Eclache3 , Frederic Kuznik3 1-mail:phbiwole@unice.fr Abstract: High operating temperatures induce a loss of efficiency in solar photovoltaic and thermal panels set-up. Results show that adding a PCM on the back of a solar panel can maintain the panel

248

Improving Cooling performance of the mechanical resonator with the two-level-system defects  

E-Print Network [OSTI]

We study cooling performance of a realistic mechanical resonator containing defects. The normal cooling method through an optomechanical system does not work efficiently due to those defects. We show by employing periodical $\\sigma_z$ pulses, we can eliminate the interaction between defects and their surrounded heat baths up to the first order of time. Compared with the cooling performance of no $\\sigma_z$ pulses case, much better cooling results are obtained. Moreover, this pulse sequence has an ability to improve the cooling performance of the resonator with different defects energy gaps and different defects damping rates.

Tian Chen; Xiang-Bin Wang

2014-06-03T23:59:59.000Z

249

Redox Flow Batteries for Grid-scale Energy Storage - Energy Innovation...  

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

and could also improve the electric grid's reliability and help connect more wind turbines and solar panels to the grid. A schematic of an upgraded vanadium redox batter...

250

Microsoft PowerPoint - MACRUC Smart Grid School_rev 2A_NETL.pptx  

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

Grid operators have new resource options p p - Reduce peak load and prices through demand response - Improve grid reliability - Access to ancillary services y Today Tomorrow Little...

251

Cyber security of the smart grid: Attack exposure analysis, detection algorithms, and testbed evaluation.  

E-Print Network [OSTI]

??While smart grid technologies are deployed to help achieve improved grid resiliency and efficiency, they also present an increased dependency on cyber resources which may… (more)

Hahn, Adam

2013-01-01T23:59:59.000Z

252

Characterizing Wireless and Powerline Communication Channels with Applications to Smart Grid Networks.  

E-Print Network [OSTI]

??Smart grid aims at improving the efficiency, reliability, security, and quality of service (QoS) of the current electricity grid by exploiting the advances in communication… (more)

Guzelgoz, Sabih

2011-01-01T23:59:59.000Z

253

NERSC and HDF Group Optimize HDF5 Library to Improve I/O Performance  

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

and HDF Group and HDF Group Optimize HDF5 Library to Improve I/O Performance NERSC and HDF Group Optimize HDF5 Library to Improve I/O Performance June 28, 2010 A common complaint among air travelers on short trips is that the time it takes to get in and out of the airplane and airports can be as long as the flight itself. In computer terms, that's a classic input/output (I/O) problem. Supercomputer users sometimes face a similar problem: the computer tears through the calculations with amazing speed, but the time it takes to write the resulting data to disk ends up slowing down the whole job. There are several layers of software that deal with I/O on high performance computing (HPC) systems. The filesystem software, such as Lustre or GPFS, is closest to the hardware and deals with the physical access and storage

254

Input/Output of ab-initio nuclear structure calculations for improved performance and portability  

SciTech Connect (OSTI)

Many modern scientific applications rely on highly computation intensive calculations. However, most applications do not concentrate as much on the role that input/output operations can play for improved performance and portability. Parallelizing input/output operations of large files can significantly improve the performance of parallel applications where sequential I/O is a bottleneck. A proper choice of I/O library also offers a scope for making input/output operations portable across different architectures. Thus, use of parallel I/O libraries for organizing I/O of large data files offers great scope in improving performance and portability of applications. In particular, sequential I/O has been identified as a bottleneck for the highly scalable MFDn (Many Fermion Dynamics for nuclear structure) code performing ab-initio nuclear structure calculations. We develop interfaces and parallel I/O procedures to use a well-known parallel I/O library in MFDn. As a result, we gain efficient I/O of large datasets along with their portability and ease of use in the down-stream processing. Even situations where the amount of data to be written is not huge, proper use of input/output operations can boost the performance of scientific applications. Application checkpointing offers enormous performance improvement and flexibility by doing a negligible amount of I/O to disk. Checkpointing saves and resumes application state in such a manner that in most cases the application is unaware that there has been an interruption to its execution. This helps in saving large amount of work that has been previously done and continue application execution. This small amount of I/O provides substantial time saving by offering restart/resume capability to applications. The need for checkpointing in optimization code NEWUOA has been identified and checkpoint/restart capability has been implemented in NEWUOA by using simple file I/O.

Laghave, Nikhil

2010-12-15T23:59:59.000Z

255

TCP HACK: TCP Header Checksum Option to Improve Performance over Lossy Links  

E-Print Network [OSTI]

In recent years, wireless networks have become increasingly common and an increasing number of devices are communicating with each other over lossy links. Unfortunately, TCP performs poorly over lossy links as it is unable to differentiate the loss due to packet corruption from that due to congestion. In this paper, we present an extension to TCP which enables TCP to distinguish packet corruption from congestion in lossy environments resulting in improved performance. We refer to this extension as the HeAder ChecKsum option (HACK). We implemented our algorithm in the Linux kernel and performed various tests to determine its effectiveness. Our results have shown that HACK performs substantially better than both SACK and NewReno in cases where burst corruptions are frequent. We also found that HACK can co-exist very nicely with SACK and performs even better with SACK enabled. Keywords -- Protocol Design, Protocol Analysis, Wireless Networks. I.

Rajesh Krishna Balan; Lee Boon Peng; K. Renjish Kumar; Lillykutty Jacob; Winston K. G. Seah; R. K. Balan; B. P. Lee; K. R. R. Kumar; L. Jacob; W. K. G. Seah; A. L. Ananda

2001-01-01T23:59:59.000Z

256

High Performance computing improvements on bioinformatics consistency-based multiple sequence alignment tools  

Science Journals Connector (OSTI)

Abstract Multiple Sequence Alignment (MSA) is essential for a wide range of applications in Bioinformatics. Traditionally, the alignment accuracy was the main metric used to evaluate the goodness of MSA tools. However, with the growth of sequencing data, other features, such as performance and the capacity to align larger datasets, are gaining strength. To achieve these new requirements, without affecting accuracy, the use of high-performance computing (HPC) resources and techniques is crucial. In this paper, we apply HPC techniques in T-Coffee, one of the more accurate but less scalable MSA tools. We integrate three innovative solutions into T-Coffee: the Balanced Guide Tree to increase the parallelism/performance, the Optimized Library Method with the aim of enhancing the scalability and the Multiple Tree Alignment, which explores different alignments in parallel to improve the accuracy. The results obtained show that the resulting tool, MTA-TCoffee, is able to improve the scalability in both the execution time and also the number of sequences to be aligned. Furthermore, not only is the alignment accuracy not affected by these improvements, as would be expected, but it improves significantly. Finally, we emphasize that the presented methods are not just restricted to T-Coffee, but may be implemented in any other alignment tools that use similar algorithms (progressive alignment, consistency or guide trees).

Miquel Orobitg; Fernando Guirado; Fernando Cores; Jordi Llados; Cedric Notredame

2014-01-01T23:59:59.000Z

257

Model Developments for Development of Improved Emissions Scenarios: Developing Purchasing-Power Parity Models, Analyzing Uncertainty, and Developing Data Sets for Gridded Integrated Assessment Models  

SciTech Connect (OSTI)

In the duration of this project, we finished the main tasks set up in the initial proposal. These tasks include: setting up the basic platform in GAMS language for the new RICE 2007 model; testing various model structure of RICE 2007; incorporating PPP data set in the new RICE model; developing gridded data set for IA modeling.

Yang, Zili; Nordhaus, William

2009-03-19T23:59:59.000Z

258

Comments of National Grid to the Smart Grid RFI  

Broader source: Energy.gov [DOE]

National Grid’s Response to the Department of Energy Smart Grid RFI: Addressing Policy and Logistical Challenges of Smart Grid Implementation

259

Value of a Smart Grid System  

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

2 - 2 - Section 3: Value of a Smart Grid System Implementing a Smart Grid is the effort to move the electric grid from a "static" to a "dynamic" state. Doing so improves the efficiency, reliability and cost-effectiveness of the electrical system's operations, planning and maintenance and creates a system that is interactive with consumers and markets, allowing better energy and dollar savings. Below we summarize the value of the Smart Grid from six perspectives: Consumers Environmental Utilities and Grid Operators Market Efficiency Economy Regulatory Consumer Value of a Smart Grid Smart Grids will provide consumers many benefits, deriving mainly from the increased information and insight it brings them about their individual consumption as

260

Smart Grid Status and Metrics Report Appendices  

SciTech Connect (OSTI)

A smart grid uses digital power control and communication technology to improve the reliability, security, flexibility, and efficiency of the electric system, from large generation through the delivery systems to electricity consumers and a growing number of distributed generation and storage resources. To convey progress made in achieving the vision of a smart grid, this report uses a set of six characteristics derived from the National Energy Technology Laboratory Modern Grid Strategy. The Smart Grid Status and Metrics Report defines and examines 21 metrics that collectively provide insight into the grid’s capacity to embody these characteristics. This appendix presents papers covering each of the 21 metrics identified in Section 2.1 of the Smart Grid Status and Metrics Report. These metric papers were prepared in advance of the main body of the report and collectively form its informational backbone.

Balducci, Patrick J.; Antonopoulos, Chrissi A.; Clements, Samuel L.; Gorrissen, Willy J.; Kirkham, Harold; Ruiz, Kathleen A.; Smith, David L.; Weimar, Mark R.; Gardner, Chris; Varney, Jeff

2014-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

Electric Power Transmission and Distribution (EPTD) Smart Grid Program (New  

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

Electric Power Transmission and Distribution (EPTD) Smart Grid Electric Power Transmission and Distribution (EPTD) Smart Grid Program (New York) Electric Power Transmission and Distribution (EPTD) Smart Grid Program (New York) < Back Eligibility Agricultural Commercial Construction Industrial Institutional Investor-Owned Utility Municipal/Public Utility Retail Supplier Rural Electric Cooperative Systems Integrator Utility Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Water Buying & Making Electricity Home Weatherization Solar Wind Program Info State New York Program Type Grant Program Provider New York State Energy Research and Development Authority Up to $10 million in funds is available from NYSERDA to support research and engineering studies, product development and demonstration projects that improve the reliability, efficiency, quality, and overall performance

262

NERSC Grid Certificates  

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

Grid Grid Certificates Grid Certificates | Tags: Grid Grid certificates allow you to access NERSC (and other Grid enabled computing facilities) via grid interfaces. Grid certificates are credentials that must be initialized for use with grid tools. Once a certificate is initialized it is automatically used by the grid tools to authenticate the user to the grid resource. Getting a Short Lived NERSC CA Certificate The NERSC Online CA now offers a quick and painless way to obtain grid certificates. You can obtain a grid certificate with a single command using this method. If you are on a NERSC system, load the globus module to set up your environment: % module load globus or % module load osg On the client system (assuming you have the globus binaries in your path), simply run:

263

Argonne TTRDC - Smart Grid - Projects  

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

Projects Projects smart grid plug The SAE J-1772 plug-in vehicle connector facilitates both charging and communication. compact metrology A prototype of Argonne's compact metrology system smart grid radio FPGA Field programmable gate array (FPGA) technologies to develop improved software-defined radios for the smart grid Codes and Standards Development Argonne researchers are helping create codes and standards that will enable widespread adoption of electric-drive transportation with smart grid interoperability. For example, the Society of Automotive Engineers' (SAE) J1772 connection standard will enable manufacturers to build compatible connector plugs and vehicle sockets that support both charging and two-way communication with utility companies. Another standard, SAE J2847, will

264

Earth resistivity measurement near substation ground grids  

SciTech Connect (OSTI)

Proper substation grounding grid design requires good, accurate soil resistivity measurements. This data is essential to model the substation ground grid to design a safe ground grid with a satisfactory ground grid resistance at minimum cost. For substations with several decades of service, there is some concern that a grid may have deteriorated, been damaged during equipment installation or excavation, or that initial soil resistivity measurements were lost or may not have been correctly performed. Ground grid conductors change the substation surface voltage distribution. Any voltage measurements taken at the complete substation will also vary from the tests made without conductors present. During testing, current was injected in the soil by probes placed near the ground grid. The current tends to follow the ground grid conductors since copper is a far better conductor than the soil it is placed in. Resistance readings near grids will be lower than readings in undisturbed soil. Since computer models were unavailable for many years, analyzing the effect of the grid conductors on soil resistivity measurements was very difficult. As a result, soil resistivity measurements made close to substations were of little use to the engineer unless some means of correcting the measured values could be developed. This paper will present results of soil resistivity measurements near a substation ground grid before and after a ground grid has been installed and describes a means of calculating the undisturbed soil model.

Lodwig, S.G.; Mateja, S.A. [ComEd, Chicago, IL (United States)

1996-11-01T23:59:59.000Z

265

Active Power Control of Wind Power Plants for Grid Integration  

Science Journals Connector (OSTI)

Increasing penetrations of intermittent renewable energy sources, such as wind, on the utility grid have led to ... One approach for improving grid reliability with increasing wind penetrations is to actively con...

Lucy Y. Pao

2014-03-01T23:59:59.000Z

266

User-Friendly Grid Security Architecture and Protocols  

Science Journals Connector (OSTI)

My talk which includes some background information about grid computing, grid security, security infrastructure, and also some of the limitations, our proposal on some security protocols, what are the improvement...

Hoon Wei Lim

2007-01-01T23:59:59.000Z

267

Remedial System Performance Improvement for the 200-ZP-1_PW-1 Operable Units at Hanford  

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

Hanford Operations Review Report: Feasibility Study Strategies and Remedial System Performance Improvement for the 200- ZP-1/PW-1 Operable Units at Hanford Prepared for Office of Groundwater and Soil Remediation Office of Environmental Management February 9, 2007 i EXECUTIVE SUMMARY At the request of the U.S. Department of Energy, Headquarters' Office of Environmental Management, the Office of Groundwater and Soil Remediation (EM-22), performed a Remediation System Evaluation (RSE) of the 200-ZP-1/PW-1 groundwater pump and treat (P&T) system, as well as the vadose zone Soil Vapor Extraction (SVE) system at the Hanford

268

DOE-HDBK-1028-2009; Human Performance Improvement Handbook, Volume 1  

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

028-2009 028-2009 June 2009 DOE STANDARD HUMAN PERFORMANCE IMPROVEMENT HANDBOOK VOLUME 1: CONCEPTS AND PRINCIPLES U.S. Department of Energy AREA HFAC Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. NOT MEASUREMENT SENSITIVE Available on the Department of Energy Technical Standards Program Web site at http://www.hss.energy.gov/nuclearsafety/ns/techstds/ DOE-HDBK-1028-2009 i VOLUME 1: CONCEPTS AND PRINCIPLES PREFACE ....................................................................................................................... v Reading The Handbook ............................................................................................... vi CHAPTER 1 - INTRODUCTION TO HUMAN PERFORMANCE..............1-1

269

Combined cooling, heating and power: A review of performance improvement and optimization  

Science Journals Connector (OSTI)

Abstract This paper presents a review on combined cooling, heating, and power (CCHP) systems. This work summarizes the methods used to perform energetic and exergetic analyses, system optimization, performance improvement studies, and development and analysis of CCHP systems, as reported in existing literature. In addition, this work highlights the most current research and emerging trends in CCHP technologies. It is envisioned that the information collected in this review paper will be a valuable source of information, for researchers, designers, and engineers, and provides direction and guidance for future research in CCHP technology.

Heejin Cho; Amanda D. Smith; Pedro Mago

2014-01-01T23:59:59.000Z

270

POWER GRID DYNAMICS: ENHANCING POWER SYSTEM OPERATION THROUGH PRONY ANALYSIS  

SciTech Connect (OSTI)

Prony Analysis is a technique used to decompose a signal into a series consisting of weighted complex exponentials and promises to be an effi cient way of recognizing sensitive lines during faults in power systems such as the U.S. Power grid. Positive Sequence Load Flow (PSLF) was used to simulate the performance of a simple two-area-four-generator system and the reaction of the system during a line fault. The Dynamic System Identifi cation (DSI) Toolbox was used to perform Prony analysis and use modal information to identify key transmission lines for power fl ow adjustment to improve system damping. The success of the application of Prony analysis methods to the data obtained from PSLF is reported, and the key transmission line for adjustment is identifi ed. Future work will focus on larger systems and improving the current algorithms to deal with networks such as large portions of the Western Electricity Coordinating Council (WECC) power grid.

Ray, C.; Huang, Z.

2007-01-01T23:59:59.000Z

271

Cu-Pd Hydrogen Separation Membranes with Reduced Palladium Content and Improved Performance  

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

Cu-Pd Hydrogen Separation Membranes with Reduced Cu-Pd Hydrogen Separation Membranes with Reduced Palladium Content and Improved Performance Opportunity This patent-pending technology, "Cu-Pd Hydrogen Separation Membranes with Reduced Palladium Content and Improved Performance," consists of copper-palladium alloy compositions for hydrogen separation membranes that use less palladium and have a potential increase in hydrogen permeability and resistance to sulfur degradation compared to currently available copper-palladium membranes. This technology is available for licensing and/or further collaborative research with the U.S. Department of Energy's National Energy Technology Laboratory. Overview NETL is working to help produce and deliver hydrogen from fossil fuels including coal in commercially applicable and environmentally

272

Integrated Approach Towards the Application of Horizontal Wells to Improve Waterflooding Performance  

SciTech Connect (OSTI)

This report is funded under the Department of Energy's Class I program which is targeted towards improving the reservoir performance of mature oil fields located in fluvially dominated deltaic geological environments. The project involves using an integrated approach to characterize the reservoir followed by proposing an approach reservoir management strategy to improve the field performance. In the first stage of the project, the type of data integrated includes cross bore hole seismic surveys, geological interpretation based on the logs and the cores, and the engineering information. In contrast, during the second stage of the project, it was intended to use only conventional data to construct the reservoir description. This report covers the results of the implementation from the first state of the project. It also discusses the work accomplished so far to the second stage of the project . The production from the Shelf Unit (location of Stage I) has sustained a significant increase over more than three years.

Kelkar, M.; Kerr, D.

1999-04-17T23:59:59.000Z

273

Performance Improvements to the Neutron Imaging System at the National Ignition Facility  

SciTech Connect (OSTI)

A team headed by LANL and including many members from LLNL and NSTec LO and NSTec LAO fielded a neutron imaging system (NIS) at the National Ignition Facility at the start of 2011. The NIS consists of a pinhole array that is located 32.5 cm from the source and that creates an image of the source in a segmented scintillator 28 m from the source. The scintillator is viewed by two gated, optical imaging systems: one that is fiber coupled, and one that is lens coupled. While there are a number of other pieces to the system related to pinhole alignment, collimation, shielding and data acquisition, those pieces are discussed elsewhere and are not relevant here. The system is operational and has successfully obtained data on more that ten imaging shots. This remainder of this whitepaper is divided in five main sections. In Section II, we identify three critical areas of improvement that we believe should be pursued to improve the performance of the system for future experiments: spatial resolution, temporal response and signal-to-noise ratio. In Section III, we discuss technologies that could be used to improve these critical performance areas. In Section IV, we describe a path to evolve the current system to achieve improved performance with minimal impact on the ability of the system to operate on shots. In Section V, we discuss the abilities, scope and timescales of the current teams and the Commissariat energie atomique (CEA). In Section VI, we summarize and make specific recommendations for collaboration on improvements to the NIS.

Fittinghoff, D N; Bower, D E; Drury, O B; Dzenitis, J M; Hatarik, R; Merrill, F E; Grim, G P; Wilde, C H; Wilson, D C; Landoas, O; Caillaud, T; Bourgade, J; Buckles, R A; Lee, J; Weiss, P B

2011-09-26T23:59:59.000Z

274

Corporate Energy Management Strategies for GHG Reduction and Improved Business Performance  

E-Print Network [OSTI]

Corporate Energy Management Strategies for GHG Reduction & Improved Business Performance James E. Robinson, P.E., P.Eng., CEM, CEP Principal Project Engineer DES Global, LLC Greenville, South Carolina ABSTRACT Experience shows... level requires a lengthy project identi- fication, approval, implementation, and final per- formance evaluation cycle. Pending GHG regula- tions, energy cost, and business volatility have corpo- rations accelerating deployment this class of system...

Robinson, J. E.

275

Improving Steam System Performance: A Sourcebook for Industry, Second Edition (Book) (Revised)  

SciTech Connect (OSTI)

Improving Steam System Performance: A Sourcebook for Industry was developed for the U.S. Department of Energy's (DOE) Advanced Manufacturing Office (AMO), formerly the Industrial Technologies Program. AMO undertook this project as a series of sourcebook publications. Other topics in this series include: compressed air systems, pumping systems, fan systems, process heating and motor and drive systems. For more information about program resources, see AMO in the Where to Find Help section of this publication.

Not Available

2012-10-01T23:59:59.000Z

276

Building America Webinar: Retrofitting Central Space Conditioning Strategies for Multifamily Buildings- Control strategies to improve hydronic space heating performance  

Broader source: Energy.gov [DOE]

This webinar was presented on July 16, 2014, and provided information about improving the performance of central space conditioning systems in multifamily buildings.

277

Improved System Performance and Reduced Cost of a Fuel Reformer, LNT, and SCR Aftertreatment System Meeting Emissions Useful Life Requirement  

Broader source: Energy.gov [DOE]

An advanced exhaust aftertreatment system developed to meet EPA 2010 and final Tier 4 emission regulations show substantial improvements in system performance while reducing system cost

278

Effect of updated data base and improved analysis on performance of radioisotope thermophotovoltaic converter  

SciTech Connect (OSTI)

Previous analyses of RTPV space power systems published by the authors were based on a number of approximations employed to permit early dissemination of preliminary results pending availability of fuller experimental data need3d to conduct more rigorous analyses. Among those approximations were: (1) the use of limited test data and optimistic projections of the spectral transmissivity of the RTPV`s selective IR filters and of the spectral quantum efficiency of the GaSb PV cells; (2) the use of theoretical formulas instead of experimental measurements of the PV cell`s open-circuit voltage, fill factor, and optimum voltage instead of its measured current-voltage characteristics; (3) rough estimates of the TPV converter`s active-area fraction instead of computed values based on detailed designs; (4) inadequate accounting for the effect of radiation reflected by the IR filter and absorbed by the emitter in reducing the generator`s required heat input; and (5) omission of the shadowing effect and ohmic losses caused by the PV cell`s grid lines. The above-listed shortcomings of the previously published analyses are addressed in the present paper, which describes revised analyses based on recently obtained experimental data of IR filter reflectivities and PV cell quantum efficiencies and current-voltage characteristic, measured by EDTEK under an OSC-initiated subcontract to its ongoing DOE contract. Their test results show that EDTEK has been eminently successful in improving the reflectivities of the IR filters and in reproducing the quantum efficiencies of Boeing`s best PV cells, but their initial (Dec-95) PV cell fell far short of matching the open-circuit voltages and fill factors predicted by theory.

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

1996-12-31T23:59:59.000Z

279

Economy of Smart Grid  

Science Journals Connector (OSTI)

Smart grid is generally characterized by high installation cost ... of the sources. In essence, renewable-based smart grid is bought today to reduce tomorrow’s electricity bill. The costs of smart grid include al...

Gang Liu; M. G. Rasul; M. T. O. Amanullah; M. M. K. Khan

2013-01-01T23:59:59.000Z

280

First-Ever Demonstration of Quantum Cryptography to Improve Security...  

Energy Savers [EERE]

First-Ever Demonstration of Quantum Cryptography to Improve Security of the Electric Grid First-Ever Demonstration of Quantum Cryptography to Improve Security of the Electric Grid...

Note: This page contains sample records for the topic "improve grid performance" 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

Value of a Smart Grid System | Department of Energy  

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

Value of a Smart Grid System Value of a Smart Grid System Value of a Smart Grid System Implementing a Smart Grid is the effort to move the electric grid from a "static" to a "dynamic" state. Doing so improves the efficiency, reliability and cost-effectiveness of the electrical system's operations, planning and maintenance and creates a system that is interactive with consumers and markets, allowing better energy and dollar savings. Below we summarize the value of the Smart Grid from six perspectives. Value of a Smart Grid System More Documents & Publications Value of a Smart Grid System Smart Grid: Enabler of the New Energy Economy AARP, National Consumer Law Center, and Public Citizen Comments to:DEPARTMENT OF ENERGY Smart Grid RFI: Addressing Policy and Logistical

282

DOE-HDBK-1028-2009; Human Performance Improvement Handbook, Volume 2  

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

028-2009 028-2009 June 2009 DOE STANDARD HUMAN PERFORMANCE IMPROVEMENT HANDBOOK VOLUME 2: HUMAN PERFORMANCE TOOLS FOR INDIVIDUALS, WORK TEAMS, AND MANAGEMENT U.S. Department of Energy AREA HFAC Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. NOT MEASUREMENT SENSITIVE This document is available on the Department of Energy Technical Standards Program Website at http://www.hss.energy.gov/nuclearsafety/ns/techstds/ DOE-HDBK-1028-2009 Human Performance Tools i Foreword This good practice handbook provides a set of practical methods and techniques for anticipating, preventing, and catching active human errors; and, more importantly, identifying and mitigating latent errors attributable to organizational factors.

283

A key review on performance improvement aspects of geothermal district heating systems and applications  

Science Journals Connector (OSTI)

This paper deals with a comprehensive analysis and discussion of geothermal district heating systems and applications. In this regard, case studies are presented to study the thermodynamic aspects in terms of energy and exergy and performance improvement opportunities of three geothermal district heating systems, namely (i) Balcova geothermal district heating system (BGDHS), (ii) Salihli geothermal district heating system (SGDHS), and (iii) Gonen geothermal district heating system (GGDHS) installed in Turkey. Energy and exergy modeling of geothermal district heating systems for system analysis and performance evaluation are given, while their performances are evaluated using energy and exergy analysis method. Energy and exergy specifications are presented in tables. In the analysis, the actual system operational data are utilized. In comparison of the local three district heating systems with each other, it is found that the SGDHS has highest energy efficiency, while the GGDHS has highest exergy efficiency.

Leyla Ozgener; Arif Hepbasli; Ibrahim Dincer

2007-01-01T23:59:59.000Z

284

Distribution Grid Integration  

Broader source: Energy.gov [DOE]

The DOE Systems Integration team funds distribution grid integration research and development (R&D) activities to address the technical issues that surround distribution grid planning,...

285

Surface Treatments for Improved Performance of Spinel-coated AISI 441 Ferritic Stainless Steel  

SciTech Connect (OSTI)

Ferritic stainless steels are promising candidates for IT-SOFC interconnect applications due to their low cost and resistance to oxidation at SOFC operating temperatures. However, steel candidates face several challenges; including long term oxidation under interconnect exposure conditions, which can lead to increased electrical resistance, surface instability, and poisoning of cathodes due to volatilization of Cr. To potentially extend interconnect lifetime and improve performance, a variety of surface treatments were performed on AISI 441 ferritic stainless steel coupons prior to application of a protective spinel coating. The coated coupons were then subjected to oxidation testing at 800 and 850°C in air, and electrical testing at 800°C in air. While all of the surface-treatments resulted in improved surface stability (i.e., increased spallation resistance) compared to untreated AISI 441, the greatest degree of improvement (through 20,000 hours of testing at 800°C and 14,000 hours of testing at 850°C) was achieved by surface blasting.

Stevenson, Jeffry W.; Riel, Eric M.; Stephens, Elizabeth V.; Khaleel, Mohammad A.

2013-01-01T23:59:59.000Z

286

Modular Approach for Continuous Cell-Level Balancing to Improve Performance of Large Battery Packs: Preprint  

SciTech Connect (OSTI)

Energy storage systems require battery cell balancing circuits to avoid divergence of cell state of charge (SOC). A modular approach based on distributed continuous cell-level control is presented that extends the balancing function to higher level pack performance objectives such as improving power capability and increasing pack lifetime. This is achieved by adding DC-DC converters in parallel with cells and using state estimation and control to autonomously bias individual cell SOC and SOC range, forcing healthier cells to be cycled deeper than weaker cells. The result is a pack with improved degradation characteristics and extended lifetime. The modular architecture and control concepts are developed and hardware results are demonstrated for a 91.2-Wh battery pack consisting of four series Li-ion battery cells and four dual active bridge (DAB) bypass DC-DC converters.

Muneed ur Rehman, M.; Evzelman, M.; Hathaway, K.; Zane, R.; Plett, G. L.; Smith, K.; Wood, E.; Maksimovic, D.

2014-10-01T23:59:59.000Z

287

Performance improvement study of a relativistic magnetron using MAGIC-3D  

SciTech Connect (OSTI)

A three dimensional particle-in-cell (PlC) code, MAGIC3D, is used to examine the performance improvement in a relativistic magnetron by perturbing technique. Asymmetrical metal rods of different length have been used to perturb the magnetic field in the annular sector of the resonant system. Enhancement up to 45% in the radiated output power has been obtained in the perturbed magnetic field case over the unperturbed one. It has also been found in the simulation that oscillation start up time is reduced by 16 %, and the amplitude of the nearest competing mode goes down 9dB compared to unperturbed case. Perturbed magnetic field also reduces the end caps current improving the efficiency. (author)

Maurya, S.; Singh, V.V.P., E-mail: smaurya@ceeri.ernet.in [Central Electronics Engineering Research Institute, Council of Scientific and Industrial Research, Pilani (India); Jain, P.K. [Center of Research in Microwave Tubes, Institute of Technology, Banaras Hindu University, Varanasi (India)

2011-07-01T23:59:59.000Z

288

Effects of grids in drift tubes  

SciTech Connect (OSTI)

In 2011, we upgraded a 201 MHz buncher in the proton injector for the alternating gradient synchrotron (AGS) - relativistic heavy ion collider (RHIC) complex. In the buncher we installed four grids made of tungsten to improve the transit time factor. The grid installed drift tubes have 32 mm of inner diameter and the each grid consists of four quadrants. The quadrants were cut out precisely from 1mm thick tungsten plates by a computerized numerically controlled (CNC) wire cutting electrical discharge machining (EDM). The 3D electric field of the grid was simulated.

Okamura M.; Yamauchi, H.

2012-05-20T23:59:59.000Z

289

Feedback" An Article for Smart Grid News The Smart Grid Transition-Getting Started  

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

Sharing Smart Grid Experiences through Performance Sharing Smart Grid Experiences through Performance Feedback" An Article for Smart Grid News The Smart Grid Transition-Getting Started We are on the ground floor of a Smart Grid transition that is leading us out of a centralized, information- limited infrastructure into an intelligent, modernized electric system. Simply put, our aim is to achieve a smarter grid, one that is merged with ubiquitous information and communication technologies that support a balance of centralized and distributed resources of all kinds and the active engagement of its consumers. Since 2005, a great deal of work has been done to define the vision for the Smart Grid and to communicate that vision to stakeholders. As a result, understanding has increased and many

290

Improving the performance of the actinic inspection tool with an optimized alignment procedure  

SciTech Connect (OSTI)

Extreme ultraviolet (EUV) microscopy is an important tool for the investigation of the performance of EUV masks, for detecting the presence and the characteristics of defects, and for evaluating the effectiveness of defect repair techniques. Aerial image measurement bypasses the difficulties inherent to photoresist imaging and enables high data collection speed and flexibility. It provides reliable and quick feedback for the development of masks and lithography system modeling methods. We operate the SEMATECH Berkeley Actinic Inspection Tool (AIT), a EUV microscope installed at the Advanced Light Source at Lawrence Berkeley National Laboratory. The AIT is equipped with several high-magnification Fresnel zoneplate lenses, with various numerical aperture values, that enable it image the reflective mask surface with various resolution and magnification settings. Although the AIT has undergone significant recent improvements in terms of imaging resolution and illumination uniformity, there is still room for improvement. In the AIT, an off-axis zoneplate lens collects the light coming from the sample and an image of the sample is projected onto an EUV-sensitive CCD camera. The simplicity of the optical system is particularly helpful considering that the AIT alignment has to be performed every time that a sample or a zoneplate is replaced. The alignment is sensitive to several parameters such as the lens position and orientation, the illumination direction and the sample characteristics. Since the AIT works in high vacuum, there is no direct access to the optics or to the sample during the alignment and the measurements. For all these reasons the alignment procedures and feedback can be complex, and in some cases can reduce the overall data throughput of the system. In this paper we review the main strategies and procedures that have been developed for quick and reliable alignments, and we describe the performance improvements we have achieved, in terms of aberration magnitude reduction.

Mochi, I.; Goldberg, K.A.; Naulleau, P.; Huh, Sungmin

2009-03-04T23:59:59.000Z

291

Gas cofiring in coal-fired stokers for emissions reduction and performance improvement  

SciTech Connect (OSTI)

Adding gas burners above the grate of a coal-fired stoker can be an economical method of reducing gaseous and particulate emissions and improving efficiency and operational flexibility. With this cofiring configuration, the improved heat distribution and mixing with the stoker combustion products can give reduced opacity, reduced emissions of particulate, NO{sub x} and SO{sub 2}, improved carbon burnout and lower overall ash, reduced excess air, faster load response, cleaner and quicker lightoffs, improved turndown at both lower and upper capacity limits, and improved performance with problematic coals. To develop and validate the cofiring technology, three cofire field experiments have been conducted. A 165,000 lb/hr spreader stoker and mass feed chain grate stokers rated at 40,000 and 75,000 lb/hr have been retrofit with gas burners and tested in the field. The two larger units used dual, opposed burners, while the smaller unit was retrofit with a single burner. With the spreader stoker, the primary benefits of gas cofire was reduction in opacity episodes with coal quality variability and recovery of lost derate. With the larger chain grate unit, the primary benefit was reduction of NO{sub x} and SO{sub 2} to within Title V limits and elimination of opacity episodes during startup and load swings. With the smaller chain grate, the primary benefit was ability to operate at low loads without unacceptable opacity excursions which had previously required a backup boiler. In all cases, the economics justified the capital burner system retrofit cost and incremental fuel costs.

Mason, H.B.; Drennan, S.; Chan, I.; Kinney, W.L.; Borland, D.

1996-12-31T23:59:59.000Z

292

Running Grid Jobs at NERSC  

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

Running Grid Jobs Running Grid Jobs | Tags: Grid How to submit a grid job to NERSC The following NERSC resources support job submission via Grid interfaces. Remote job submission...

293

ARPA-E: Advancing the Electric Grid  

ScienceCinema (OSTI)

The electric grid was designed with the assumption that all energy generation sources would be relatively controllable, and grid operators would always be able to predict when and where those sources would be located. With the addition of renewable energy sources like wind and solar, which can be installed faster than traditional generation technologies, this is no longer the case. Furthermore, the fact that renewable energy sources are imperfectly predictable means that the grid has to adapt in real-time to changing patterns of power flow. We need a dynamic grid that is far more flexible. This video highlights three ARPA-E-funded approaches to improving the grid's flexibility: topology control software from Boston University that optimizes power flow, gas tube switches from General Electric that provide efficient power conversion, and flow batteries from Harvard University that offer grid-scale energy storage.

Lemmon, John; Ruiz, Pablo; Sommerer, Tim; Aziz, Michael

2014-03-13T23:59:59.000Z

294

ARPA-E: Advancing the Electric Grid  

SciTech Connect (OSTI)

The electric grid was designed with the assumption that all energy generation sources would be relatively controllable, and grid operators would always be able to predict when and where those sources would be located. With the addition of renewable energy sources like wind and solar, which can be installed faster than traditional generation technologies, this is no longer the case. Furthermore, the fact that renewable energy sources are imperfectly predictable means that the grid has to adapt in real-time to changing patterns of power flow. We need a dynamic grid that is far more flexible. This video highlights three ARPA-E-funded approaches to improving the grid's flexibility: topology control software from Boston University that optimizes power flow, gas tube switches from General Electric that provide efficient power conversion, and flow batteries from Harvard University that offer grid-scale energy storage.

Lemmon, John; Ruiz, Pablo; Sommerer, Tim; Aziz, Michael

2014-02-24T23:59:59.000Z

295

Improved Strategies for Enhanced Business Performance in Cloud based IT Industries  

E-Print Network [OSTI]

Emergence of sophisticated technologies in IT industries has posed several challenges such as production of products using advanced technical process for instance Result Orientation Approach, Deployment, Assessment and Refinement (RADAR) in a dynamic and competitive environment. The key challenge for any engineer is therefore to develop process and products which ultimately lead towards total customer satisfaction. Recent development in technology has driven most of the IT industries to operate in the cloud environment due to reduced infrastructure investment and maintenance overheads. However, existing process in cloud lacks efficient multiple service paradigms that can provide improved business gain. Thus, it is the responsibility of every engineer to contribute towards effective and efficient techniques and models that can enhance the business performance. The position of this paper is to present several major issues prevailing in the IT industries such as delay time, response time, performance etc., which...

Nair, T R Gopalakrishnan; Suma, V

2012-01-01T23:59:59.000Z

296

Review of Strategies and Technologies for Demand-Side Management on Isolated Mini-Grids  

E-Print Network [OSTI]

from: www.devergy.com ESMAP. 2000. Mini-grid design manual.Valley photovoltaic-diesel mini-grid: System performance andon a renewable energy mini-grid in Bhutan. Environmental

Harper, Meg

2014-01-01T23:59:59.000Z

297

A Grid Portal Model Based on Security and Storage Resource Proxy  

Science Journals Connector (OSTI)

Grid computing is recently developed concept in high performance computing. Security and resource management is the two key technologies in a grid. In this paper, we describe a grid portal model based on security

Quan Zhou; Geng Yang

2005-01-01T23:59:59.000Z

298

Computational Mini-Grid Research at Clemson University Parallel Architecture Research Lab  

E-Print Network [OSTI]

Computational Mini-Grid Research at Clemson University Parallel Architecture Research Lab November in the high performance computing world. At Clemson University, we have built a campus-wide grid, or "mini-grid of the Clemson computational mini-grid is shown in figure 1. The 5 clusters in the grid now consist of 792

Jones, William Michael

299

Modern Smart Grid Offers Consumers the Power of Choice | Department of  

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

Modern Smart Grid Offers Consumers the Power of Choice Modern Smart Grid Offers Consumers the Power of Choice Modern Smart Grid Offers Consumers the Power of Choice February 7, 2011 - 9:19am Addthis Erin R. Pierce Erin R. Pierce Digital Communications Specialist, Office of Public Affairs Home energy assessments are a practical, straightforward way to improve the overall efficiency of your home. Learning how to better manage home energy use can lead to significant cost savings. You may have enlisted the help of a professional auditor to perform the evaluation or relied on an annual, do-it-yourself review-but what if you could monitor your home's energy use on a monthly, weekly, or even daily basis? That's exactly what Smart Grid technology offers-providing both consumers and utilities with the information to better manage electricity use, in

300

A linear MOSFET regulator for improving performance of the booster ramping power supplies at the APS.  

SciTech Connect (OSTI)

The APS booster ring uses ramping power supplies to power the sextupole, quadrupole, and dipole magnets as the beam energy ramps up linearly to 7 GeV. Due to the circuit topology used, those supplies are unable to follow the linear ramp to the desired accuracy. The best regulation achieved is 0.25% while 0.1% is desired. In addition to the unsatisfying regulation, those supplies are sensitive to AC line perturbation and are not able to reject AC line noises of more than a few tens of hertz. To improve the performance, a linear MOSFET regulation system using paralleled MOSFET devices in series with the power supply is proposed. The system uses a realtime current feedback loop to force the MOSFETs to work in the linear operation mode. By using this linear MOSFET regulator, the voltage drop on MOSFETs, and hence the voltage imposed on magnets, can be regulated very quickly. As a result, the regulation of the magnet current can be improved significantly. So far the simulation results show that with the linear regulator, the current regulation can be improved to better than 0.1%. Because of the high bandwidth of the linear regulator, it can reduce the harmonic content in the output current as well as reject the AC line disturbance. This paper discusses the circuit topology, the regulation method, and the simulation results.

Feng, G.; Deriy, B.; Wang, J.; Accelerator Systems Division (APS)

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

Improving thermosyphon solar domestic hot water system model performance. Final report, March 1994--February 1995  

SciTech Connect (OSTI)

Data from an indoor solar simulator experimental performance test is used to develop a systematic calibration procedure for a computer model of a thermosyphoning, solar domestic hot water heating system with a tank-in-tank heat exchanger. Calibration is performed using an indoor test with a simulated solar collector to adjust heat transfer in the heat exchanger and heat transfer between adjacent layers of water in the storage tank. An outdoor test is used to calibrate the calculation of the friction drop in the closed collector loop. Additional indoor data with forced flow in the annulus of the heat exchanger leads to improved heat transfer correlations for the inside and outside regions of the tank-in-tank heat exchanger. The calibrated simulation model is compared to several additional outdoor tests both with and without auxiliary heating. Integrated draw energies are predicted with greater accuracy and draw temperature profiles match experimental results to a better degree. Auxiliary energy input predictions improve significantly. 63 figs., 29 tabs.

Swift, T.N.

1996-09-01T23:59:59.000Z

302

Feed-pump hydraulic performance and design improvement, Phase I: research program design. Final report  

SciTech Connect (OSTI)

As a result of prior EPRI-sponsored studies, it was concluded that a research program should be designed and implemented to provide an improved basis for the design, procurement, testing, and operation of large feed pumps with increased reliability and stability over the full range of operating conditions. This two-volume report contains a research plan which is based on a review of the present state of the art and which defines the necessary R and D program and estimates the benefits and costs of the program. The recommended research program consists of 30 interrelated tasks. It is designed to perform the needed research; to verify the results; to develop improved components; and to publish computer-aided design methods, pump specification guidelines, and a troubleshooting manual. Most of the technology proposed in the research plan is applicable to nuclear power plants as well as to fossil-fired plants. This volume discusses the design, performance and failures of feed pumps, and recommendations for research on pump dynamics, design, and specifications.

Brown, W.H.; Gopalakrishnan, S.; Fehlau, R.; Thompson, W.E.; Wilson, D.G.

1982-03-01T23:59:59.000Z

303

Thermal Processing Techniques to Improve Metal Sulfide Mixed Alcohol Catalyst Performance  

SciTech Connect (OSTI)

Research over several decades by several institutions has shown that alkali-promoted metal sulfide catalysts are capable of producing mixed alcohols from syngas with high selectivity and yield. Unfortunately, process models suggest that syngas to mixed alcohol processes, and especially thermochemical biomass to mixed alcohol processes, require improvements to sulfide catalyst activity and/or selectivity for acceptable economics. These improvements, if incremental, cannot result in increased process complexity, capital expenditure, or catalyst costs. It is well accepted among catalyst researchers that thermal processing techniques like calcining and reduction can have profound effects on the properties and performance of finished catalysts, and that small variations in thermal processing do not usually affect the overall cost of the catalyst. Metal sulfide catalysts are no exception but surprisingly, little attention has been given to the effects of thermal treatment on bulk metal sulfide mixed alcohol catalysts. This presentation will discuss how parameters like temperature, dwell time, metal ratios, and purge gas affect the performance and physical properties of K-Co/Mo catalysts.

Hensley, J.; Menart, M.; Costelow, K.; Thibodeaux, J.; Yung, M.

2011-01-01T23:59:59.000Z

304

Sulfur nanocrystals anchored graphene composite with highly improved electrochemical performance for lithium–sulfur batteries  

Science Journals Connector (OSTI)

Abstract Two kinds of graphene–sulfur composites with 50 wt% of sulfur are prepared using hydrothermal method and thermal mixing, respectively. Transmission Electron Microscopy (TEM) and Energy Dispersive X-ray Spectra mapping show that sulfur nanocrystals with size of ?5 nm dispersed on graphene sheets homogeneously for the sample prepared by hydrothermal method (NanoS@G). While for the thermal mixed graphene–sulfur composite (S–G mixture), sulfur shows larger and uneven size (50–200 nm). X-ray Photoelectron Spectra (XPS) reveals the strong chemical bonding between the sulfur nanocrystals and graphene. Comparing with the S–G mixture, the NanoS@G composite shows highly improved electrochemical performance as cathode for lithium–sulfur (Li–S) battery. The NanoS@G composite delivers an initial capacity of 1400 mAh g?1 with the sulfur utilization of 83.7% at a current density of 335 mA g?1. The capacity keeps above 720 mAh g?1 over 100 cycles. The strong adherence of the sulfur nanocrystals on graphene immobilizes sulfur and polysulfides species and suppressed the “shuttle effect”, resulting higher coulombic efficiency and better capacity retention. Electrochemical impedance also suggests that the strong bonding enabled rapid electronic/ionic transport and improved electrochemical kinetics, therefore good rate capability is obtained. These results demonstrate that the NanoS@G composite is a very promising candidate for high-performance Li–S batteries.

Jun Zhang; Zimin Dong; Xiuli Wang; Xuyang Zhao; Jiangping Tu; Qingmei Su; Gaohui Du

2014-01-01T23:59:59.000Z

305

IEEE TRANSACTIONS ON NUCLEAR SCIENCE, VOL. 54, NO. 4, AUGUST 2007 1263 Improving Spectroscopic Performance  

E-Print Network [OSTI]

-temperature energy resolution, potential for large, efficient devices, and stability over a broad temperature range- tive to gridded chambers. An investigation of this detector's energy resolution is reported for border security applications due to their combination of detection efficiency, energy resolution

He, Zhong

306

Electric Power Industry Needs for Grid-Scale Storage Applications |  

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

Industry Needs for Grid-Scale Storage Applications Industry Needs for Grid-Scale Storage Applications Electric Power Industry Needs for Grid-Scale Storage Applications Stationary energy storage technologies will address the growing limitations of the electricity infrastructure and meet the increasing demand for renewable energy use. Widespread integration of energy storage devices offers many benefits, including the following: Alleviating momentary electricity interruptions Meeting peak demand Postponing or avoiding upgrades to grid infrastructure Facilitating the integration of high penetrations of renewable energy Providing other ancillary services that can improve the stability and resiliency of the electric grid Electric Power Industry Needs for Grid-Scale Storage Applications More Documents & Publications

307

GENI: Grid Hardware and Software  

SciTech Connect (OSTI)

GENI Project: The 15 projects in ARPA-E’s GENI program, short for “Green Electricity Network Integration,” aim to modernize the way electricity is transmitted in the U.S. through advances in hardware and software for the electric grid. These advances will improve the efficiency and reliability of electricity transmission, increase the amount of renewable energy the grid can utilize, and provide energy suppliers and consumers with greater control over their power flows in order to better manage peak power demand and cost.

None

2012-01-09T23:59:59.000Z

308

The National Weather Sensor Grid: a large-scale cyber-sensor infrastructure for environmental monitoring  

Science Journals Connector (OSTI)

A sensor grid integrates sensor networks with grid infrastructures to enable the real-time collection of sensor data, and the sharing of computational and storage resources for sensor data processing and management. We have developed a sensor grid architecture framework, called the Scalable Proxy-based aRchItecture for seNsor Grid (SPRING). Based on the SPRING framework, we designed the National Weather Sensor Grid (NWSG), a large-scale cyber-sensor infrastructure for environmental monitoring. The NWSG integrates mini weather stations deployed geographically across Singapore for weather data collection, processing and management. We have designed and implemented core sensor grid middleware components and services such as resource discovery, meta scheduling, job migration and security. The NWSG is designed to support long-term weather monitoring. The performance of the NWSG has been demonstrated in terms of reduction in latency for end-user response, significant improvement in overall system throughput, and even load balance across the sensor grid infrastructure.

Hock Beng Lim; Mudasser Iqbal; Wenqiang Wang; Yuxia Yao

2010-01-01T23:59:59.000Z

309

Recovery Act Funds at Work: Smart Grid Investment Grant Profiles |  

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

Funds at Work: Smart Grid Investment Grant Profiles Funds at Work: Smart Grid Investment Grant Profiles Recovery Act Funds at Work: Smart Grid Investment Grant Profiles DOE is working with regional and local utilities and co-ops across the nation to improve the reliability of the grid and helping communities recover faster when disruptions occur. Case studies are available from several grant recipients describing how Smart Grid Investment Grants are making an impact. Additional information is available on SmartGrid.gov, including impact metrics, tracking data, and specifics on all projects. Case Study - Oklahoma Gas and Electric - Using Time-Based Rate Program to Reduce Peak Demand - April 2013 Case Study - Idaho Power Company - Smart Grid Savings and Grid Integration of Renewables - April 2013 Case Study - Powder River Energy Corp - Providing Grid Flexibility in WY

310

Image enhancement with polymer grid triode arrays  

SciTech Connect (OSTI)

An array of polymer grid triodes connected by a common grid functions as a {open_quotes}plastic retina,{close_quotes} providing local contrast gain control for image enhancement. This simple device, made from layers of conducting polymers, functions as an active resistive network that performs center-surround filtering. The polymer grid triode array with common grid is a continuous analog of the discrete approach of Mead, with a variety of fabrication advantages and significant savings in area within the unit cell of each pixel. 6 refs., 4 figs.

Heeger, A.J.; Heeger, D.J.; Langan, J. [UNIAX Corporation, Santa Barbara, CA (United States)] [and others

1995-12-08T23:59:59.000Z

311

GIVS: integrity validation for grid security  

Science Journals Connector (OSTI)

In recent years, grid computing has been recognised as the next step in the evolution of distributed systems. However, only limited efforts have been made to address the security issues involved in these architectures. Questions like 'What happens if a user of the grid is interested in making the overall computation fail?' are still unanswered. In this paper, we address the problem of granting the correctness of grid computations. We introduce a Grid Integrity Validation Scheme (GIVS) that may reveal the presence of malicious hosts through statistical sampling of computational results. Performance overheads of GIVS strategies are evaluated using statistical models and simulation.

Stefano Zanero; Giuliano Casale

2008-01-01T23:59:59.000Z

312

Improved photovoltaic performances by post-deposition acidic treatments on tetrapod shaped colloidal nanocrystal solids  

Science Journals Connector (OSTI)

The ligand exchange reaction with pyridine is the standard procedure for the integration of colloidal semiconductor nanocrystals (NCs) in photovoltaic devices; however, for large sized and irregularly shaped branched NCs, such as CdSe@CdTe tetrapods, this procedure can lead to a considerable waste of materials and the aggregation of NCs in the colloidal solution, therefore resulting in the formation of an inhomogeneous film and low device performances. Here, we report on alternative post-deposition treatments with carboxylic acids on films of CdSe@CdTe tetrapod shaped NCs. This approach guarantees the removal of the insulating surfactant, necessary to obtain good charge transport among NCs, while preserving the film integrity. We perform a complete characterization of the nanocrystalline films treated with different carboxylic acids and demonstrate the successful integration of such films in photovoltaic devices, showing a doubled efficiency with respect to the standard ligand exchange procedure. Our approach represents a general route towards the development of NC based devices with improved performances and minimized waste of material.

Rosanna Mastria; Aurora Rizzo; Concetta Nobile; Susmit Kumar; Giuseppe Maruccio; Giuseppe Gigli

2012-01-01T23:59:59.000Z

313

The Pointing System of the Herschel Space Observatory. Description, Calibration, Performance and Improvements  

E-Print Network [OSTI]

We present the activities carried out to calibrate and characterise the performance of the elements of attitude control and measurement on board the Herschel spacecraft. The main calibration parameters and the evolution of the indicators of the pointing performance are described, from the initial values derived from the observations carried out in the performance verification phase to those attained in the last year and half of mission, an absolute pointing error around or even below 1 arcsec, a spatial relative pointing error of some 1 arcsec and a pointing stability below 0.2 arsec. The actions carried out at the ground segment to improve the spacecraft pointing measurements are outlined. On-going and future developments towards a final refinement of the Herschel astrometry are also summarised. A brief description of the different components of the attitude control and measurement system (both in the space and in the ground segments) is also given for reference. We stress the importance of the cooperation b...

Sánchez-Portal, Miguel; Altieri, Bruno; Aussel, Hervé; Feuchtgruber, Helmut; Klaas, Ulrich; Linz, Hendrik; Lutz, Dieter; Merín, Bruno; Müller, Thomas; Nielbock, Markus; Oort, Marc; Pilbratt, Göran; Schmidt, Micha; Stephenson, Craig; Tuttlebee, Mark

2014-01-01T23:59:59.000Z

314

Efficient PMU data dissemination in smart grid  

Science Journals Connector (OSTI)

Next-generation Smart Grid will be a highly data driven system with sensors deployed across the grid and analytics being performed on the data collected for intelligent and timely decision making. This paper proposes novel techniques for filtering as ... Keywords: PMU, anglular stability, data dissemination, in-network filtering, sub-query

Kedar Khandeparkar, Pratik Patre, Swadesh Jain, Krithi Ramamritham, Rajeev Gupta

2014-06-01T23:59:59.000Z

315

Systems Study for Improving Gas Turbine Performance for Coal/IGCC Application  

SciTech Connect (OSTI)

This study identifies vital gas turbine (GT) parameters and quantifies their influence in meeting the DOE Turbine Program overall Integrated Gasification Combined Cycle (IGCC) plant goals of 50% net HHV efficiency, $1000/kW capital cost, and low emissions. The project analytically evaluates GE advanced F class air cooled technology level gas turbine conceptual cycle designs and determines their influence on IGCC plant level performance including impact of Carbon capture. This report summarizes the work accomplished in each of the following six Tasks. Task 1.0--Overall IGCC Plant Level Requirements Identification: Plant level requirements were identified, and compared with DOE's IGCC Goal of achieving 50% Net HHV Efficiency and $1000/KW by the Year 2008, through use of a Six Sigma Quality Functional Deployment (QFD) Tool. This analysis resulted in 7 GT System Level Parameters as the most significant. Task 2.0--Requirements Prioritization/Flow-Down to GT Subsystem Level: GT requirements were identified, analyzed and prioritized relative to achieving plant level goals, and compared with the flow down of power island goals through use of a Six Sigma QFD Tool. This analysis resulted in 11 GT Cycle Design Parameters being selected as the most significant. Task 3.0--IGCC Conceptual System Analysis: A Baseline IGCC Plant configuration was chosen, and an IGCC simulation analysis model was constructed, validated against published performance data and then optimized by including air extraction heat recovery and GE steam turbine model. Baseline IGCC based on GE 207FA+e gas turbine combined cycle has net HHV efficiency of 40.5% and net output nominally of 526 Megawatts at NOx emission level of 15 ppmvd{at}15% corrected O2. 18 advanced F technology GT cycle design options were developed to provide performance targets with increased output and/or efficiency with low NOx emissions. Task 4.0--Gas Turbine Cycle Options vs. Requirements Evaluation: Influence coefficients on 4 key IGCC plant level parameters (IGCC Net Efficiency, IGCC Net Output, GT Output, NOx Emissions) of 11 GT identified cycle parameters were determined. Results indicate that IGCC net efficiency HHV gains up to 2.8 pts (40.5% to 43.3%) and IGCC net output gains up to 35% are possible due to improvements in GT technology alone with single digit NOx emission levels. Task 5.0--Recommendations for GT Technical Improvements: A trade off analysis was conducted utilizing the performance results of 18 gas turbine (GT) conceptual designs, and three most promising GT candidates are recommended. A roadmap for turbine technology development is proposed for future coal based IGCC power plants. Task 6.0--Determine Carbon Capture Impact on IGCC Plant Level Performance: A gas turbine performance model for high Hydrogen fuel gas turbine was created and integrated to an IGCC system performance model, which also included newly created models for moisturized syngas, gas shift and CO2 removal subsystems. This performance model was analyzed for two gas turbine technology based subsystems each with two Carbon removal design options of 85% and 88% respectively. The results show larger IGCC performance penalty for gas turbine designs with higher firing temperature and higher Carbon removal.

Ashok K. Anand

2005-12-16T23:59:59.000Z

316

Grid Interaction Tech Team, and International Smart Grid Collaboration...  

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

Team, and International Smart Grid Collaboration Grid Interaction Tech Team, and International Smart Grid Collaboration 2012 DOE Hydrogen and Fuel Cells Program and Vehicle...

317

Smart Grid Overview  

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

Smart Grid Overview Ben Kroposki, PhD, PE Director, Energy Systems IntegraLon NaLonal Renewable Energy Laboratory What is t he S mart Grid? and DER Source: NIST/EPRI Architecture Task Group The S mart Grid is the electricity producHon a nd delivery s ystem along with consumpHon integrated with communicaHons and informaHon technology The S mart Grid is an automated, widely distributed energy delivery network characterized by a two---way flow of electricity and informaHon, capable of monitoring a nd responding t o changes in everything f rom power plants to customer preferences t o individual appliances. 2 Grid ModernizaHon - Smart Grid Scope Transmission DistribuHon End---Use and DER 2010 Smart Grid System Report, February 2012 hNp://energy.gov/sites/prod/files/2010%20Smart%20Grid%20System%20Report.pdf 3 Smart Grid Vision

318

Pulsed laser deposition of Mn doped CdSe quantum dots for improved solar cell performance  

SciTech Connect (OSTI)

In this work, we demonstrate (1) a facile method to prepare Mn doped CdSe quantum dots (QDs) on Zn{sub 2}SnO{sub 4} photoanodes by pulsed laser deposition and (2) improved device performance of quantum dot sensitized solar cells of the Mn doped QDs (CdSe:Mn) compared to the undoped QDs (CdSe). The band diagram of photoanode Zn{sub 2}SnO{sub 4} and sensitizer CdSe:Mn QD is proposed based on the incident-photon-to-electron conversion efficiency (IPCE) data. Mn-modified band structure leads to absorption at longer wavelengths than the undoped CdSe QDs, which is due to the exchange splitting of the CdSe:Mn conduction band by the Mn dopant. Three-fold increase in the IPCE efficiency has also been observed for the Mn doped samples.

Dai, Qilin; Wang, Wenyong, E-mail: wwang5@uwyo.edu, E-mail: jtang2@uwyo.edu; Tang, Jinke, E-mail: wwang5@uwyo.edu, E-mail: jtang2@uwyo.edu [Department of Physics and Astronomy, University of Wyoming, Laramie, Wyoming 82071 (United States); Sabio, Erwin M. [Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071 (United States)

2014-05-05T23:59:59.000Z

319

Improved performance of U-Mo dispersion fuel by Si addition in Al matrix.  

SciTech Connect (OSTI)

The purpose of this report is to collect in one publication and fit together work fragments presented in many conferences in the multi-year time span starting 2002 to the present dealing with the problem of large pore formation in U-Mo/Al dispersion fuel plates first observed in 2002. Hence, this report summarizes the excerpts from papers and reports on how we interpreted the relevant results from out-of-pile and in-pile tests and how this problem was dealt with. This report also provides a refined view to explain in detail and in a quantitative manner the underlying mechanism of the role of silicon in improving the irradiation performance of U-Mo/Al.

Kim, Y S; Hofman, G L [Nuclear Engineering Division

2011-06-01T23:59:59.000Z

320

Using MPI File Caching to Improve Parallel Write Performance for Large-Scale Scientific Applications  

SciTech Connect (OSTI)

Typical large-scale scientific applications periodically write checkpoint files to save the computational state throughout execution. Existing parallel file systems improve such write-only I/O patterns through the use of clientside file caching and write-behind strategies. In distributed environments where files are rarely accessed by more than one client concurrently, file caching has achieved significant success; however, in parallel applications where multiple clients manipulate a shared file, cache coherence control can serialize I/O. We have designed a thread based caching layer for the MPI I/O library, which adds a portable caching system closer to user applications so more information about the application's I/O patterns is available for better coherence control. We demonstrate the impact of our caching solution on parallel write performance with a comprehensive evaluation that includes a set of widely used I/O benchmarks and production application I/O kernels.

Liao, Wei-keng [Northwestern University, Evanston; Ching, Avery [Northwestern University, Evanston; Coloma, Kenin [Northwestern University, Evanston; Nisar, Arifa [Northwestern University, Evanston; Choudhary, Alok [Northwestern University, Evanston; Chen, Jackie [Sandia National Laboratories (SNL); Sankaran, Ramanan [ORNL; Klasky, Scott A [ORNL

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

Using MPI file caching to improve parallel write performance for large-scale scientific applications  

SciTech Connect (OSTI)

Typical large-scale scientific applications periodically write checkpoint files to save the computational state throughout execution. Existing parallel file systems improve such write-only I/O patterns through the use of client-side file caching and write-behind strategies. In distributed environments where files are rarely accessed by more than one client concurrently, file caching has achieved significant success; however, in parallel applications where multiple clients manipulate a shared file, cache coherence control can serialize I/O. We have designed a thread based caching layer for the MPI I/O library, which adds a portable caching system closer to user applications so more information about the application's I/O patterns is available for better coherence control. We demonstrate the impact of our caching solution on parallel write performance with a comprehensive evaluation that includes a set of widely used I/O benchmarks and production application I/O kernels.

Sankaran, Ramanan [ORNL; Liao, Wei-Keng [ORNL; Chen, Jacqueline H [Sandia National Laboratories (SNL); Klasky, Scott A [ORNL; Choudhary, Alok [Northwestern University, Evanston

2007-01-01T23:59:59.000Z

322

Performance and improvements of the tritium handling facility at the Los Alamos Scientific Laboratory  

SciTech Connect (OSTI)

A major problem facing todays nuclear energy industry is the release of radioactive waste products to the atmosphere. The DP-East Tritium Handling Facility at the Los Alamos Scientific Laboratory (LASL), activated December 5, 1974 has processed 3.8 x 10/sup 6/ curies of tritium with a total stack release of 704.5 curies as of December 12, 1979. This averages only 11.7 Ci/month which to our knowledge is the lowest stack release any major tritium facility has achieved. The facility includes an 11.5 m/sup 3/ dry box with associated gas purification system (GPS) and an effluent treatment system (FTS). The system performance, problems, and improvements are discussed with special emphasis given to the ETS, the new dry box waste disposal system, and the new automated logic control system, all of which contribute significantly to the low level tritium release at this facility.

Nasise, J.E.

1980-01-01T23:59:59.000Z

323

Performance of improved dynamic source routing algorithm for military communication logistics  

Science Journals Connector (OSTI)

Mobile ad-hoc networks (MANETs) are autonomous, self-configuring and dynamic networks that operate without the support of any fixed infrastructure. Such networks are excellent candidates for military logistics which requires identification of location of sensitive frights and other communication need. Ad hoc routing protocol supports nodes mobility with multi-hop routing overwhelming the limitations of radio coverage in remote locations. Most of the present routing protocols are not designed to adapt congestion which is the dominant reason for packet loss, longer delay and jitter. In this paper, the original DSR protocol was modified to monitor the occurrence of congestion by using multiple resource utilisation thresholds as QoS attributes and trigger multi-path-routing during the periods of congestion to improve QoS. This paper also deals with the effects of mobility on the modified routing protocol. The NS-2 simulation results showed that a significant improvement in performance of modified DSR was achieved and decreases the network congestion with the use of multi-path routing.

A. Valarmathi; R.M. Chandrasekaran

2011-01-01T23:59:59.000Z

324

Sandia National Laboratories: electric grid  

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

grid ECIS-Princeton Power Systems, Inc.: Demand Response Inverter On March 19, 2013, in DETL, Distribution Grid Integration, Energy, Energy Surety, Facilities, Grid Integration,...

325

Interactive Grid | Department of Energy  

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

to promote better understanding of the operation of the power grid. Congressional Testimony Recovery Act Educational Resources Electricity 101 Interactive Grid Smart Grid Primer...

326

Sandia National Laboratories: Grid Integration  

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

Grid Integration Energy Supply Transformation Needed On February 20, 2013, in DETL, Distribution Grid Integration, Energy, Energy Assurance, Energy Surety, Grid Integration,...

327

Sandia National Laboratories: SMART Grid  

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

SMART Grid Mesa del Sol Project Is Finalist for International Smart Grid Action Network 2014 Award of Excellence On July 31, 2014, in Distribution Grid Integration, Energy, Energy...

328

How to Estimate the Value of Service Reliability Improvements  

E-Print Network [OSTI]

smart grid investment is proposed, reliability improvement is one of the most frequently cited benefits.

Sullivan, Michael J.

2010-01-01T23:59:59.000Z

329

Shifting the Paradigm for Long Term Monitoring at Legacy Sites to Improve Performance while Reducing Cost  

SciTech Connect (OSTI)

A major issue facing many government and private industry sites that were previously contaminated with radioactive and chemical wastes is that often the sites cannot be cleaned up enough to permit unrestricted human access. These sites will require long-term management, in some cases indefinitely, leaving site owners with the challenge of protecting human health and environmental quality in a cost effective manner. Long-term monitoring of groundwater contamination is one of the largest projected costs in the life cycle of environmental management at the Savannah River Site (SRS), the larger DOE complex, and many large federal and private sites. Currently, most monitoring strategies are focused on laboratory measurements of contaminants measured in groundwater samples collected from wells. This approach is expensive, and provides limited and lagging information about the effectiveness of cleanup activities and the behavior of the residual contamination. Over the last twenty years, DOE and other federal agencies have made significant investments in the development of various types of sensors and strategies that would allow for remote analysis of contaminants in groundwater, but these approaches do not promise significant reductions in risk or cost. Scientists at SRS have developed a new paradigm to simultaneously improve the performance of long term monitoring systems while lowering the overall cost of monitoring. This alternative approach incorporates traditional point measurements of contaminant concentration with measurements of controlling variables including boundary conditions, master variables, and traditional plume/contaminant variables. Boundary conditions are the overall driving forces that control plume movement and therefore provide leading indication to changes in plume stability. These variables include metrics associated with meteorology, hydrology, hydrogeology, and land use. Master variables are the key variables that control the chemistry of the groundwater system, and include redox variables (ORP, DO, chemicals), pH, specific conductivity, biological community (breakdown/decay products), and temperature. A robust suite of relatively inexpensive tools is commercially available to measure these variables. Traditional plume/contaminant variables are various measures of contaminant concentration including traditional analysis of chemicals in groundwater samples. An innovative long term monitoring strategy has been developed for acidic or caustic groundwater plumes contaminated with metals and/or radionuclides. Not only should the proposed strategy be more effective at early identification of potential risks, this strategy should be significantly more cost effective because measurement of controlling boundary conditions and master variables is relatively simple. These variables also directly reflect the evolution of the plume through time, so that the monitoring strategy can be modified as the plume 'ages'. This transformational long-term monitoring paradigm will generate significant cost savings to DOE, other federal agencies and industry and will provide improved performance and leading indicators of environmental management performance.

Eddy-Dilek, Carol A.; Looney, Brian B.; Seaman, John; Kmetz, Thomas

2013-01-10T23:59:59.000Z

330

GRID Security Review  

Science Journals Connector (OSTI)

A Computational GRID is a collection of heterogeneous computing resources ... computational power of current micro-processors, Computational GRIDs or meta-systems have gradually become more ... a secure environme...

Lazaros Gymnopoulos; Stelios Dritsas; Stefanos Gritzalis…

2003-01-01T23:59:59.000Z

331

Incremental Partitioning-Based Vectorless Power Grid Verification  

E-Print Network [OSTI]

Incremental Partitioning-Based Vectorless Power Grid Verification Dionysios Kouroussis Department performance of a chip, design verification of the power grid is of critical importance. This paper builds the efficient verification of local power grid sections or blocks, enabling incremen- tal design analysis

Najm, Farid N.

332

Fast Vectorless Power Grid Verification Using an Approximate Inverse Technique  

E-Print Network [OSTI]

Fast Vectorless Power Grid Verification Using an Approximate Inverse Technique Nahi H. Abdul Ghani Department of ECE University of Toronto Toronto, Ontario, Canada f.najm@utoronto.ca ABSTRACT Power grid Aids General Terms Performance, Algorithms, Verification Keywords Power grid, voltage drop, approximate

Najm, Farid N.

333

Hierarchical Random-walk Algorithms for Power Grid Analysis  

E-Print Network [OSTI]

Hierarchical Random-walk Algorithms for Power Grid Analysis Haifeng Qian Sachin S. Sapatnekar Minneapolis, MN 55414 qianhf@ece.umn.edu sachin@ece.umn.edu Abstract-- This paper presents a power grid an- bond power grid, for which the performance of the generic method degrades, is solved in 75.88 seconds

Sapatnekar, Sachin

334

Early-stage Power Grid Analysis for Uncertain Working Modes  

E-Print Network [OSTI]

Early-stage Power Grid Analysis for Uncertain Working Modes Haifeng Qian Department of ECE circuits are now reaching the 100-plus watt regime, and power delivery and power grid signal integrity have and Design Aids General Terms Algorithms, Performance, Design, Reliability Keywords Power grid, Supply

Sapatnekar, Sachin

335

Smart Grid: Creating Jobs while Delivering Reliable,  

Open Energy Info (EERE)

Smart Grid: Creating Jobs while Delivering Reliable, Smart Grid: Creating Jobs while Delivering Reliable, Environmentally-friendly Energy Home > Groups > OpenEI Community Central Graham7781's picture Submitted by Graham7781(1992) Super contributor 2 March, 2010 - 14:14 imported OpenEI On April 16th, 2009, Vice President Joe Biden announced that the Department of Energy was planning to develop a stronger, more reliable energy grid. The plan would allocate $3.4 billion in funds to be distributed across the nation, aiding projects aimed at improving and updating the current electrical power grid in the United States. Two projects are funded by smart grid: smaller and larger. Smaller projects range from $300,000 to $20,000,000. These projects typically focus on upgrading equipment in less populated ares. Larger projects range from

336

Utility Grid EV charging  

E-Print Network [OSTI]

Main Utility Grid EV charging PCC Batteries DC Load EV charging Flywheel Interlinking converter PV or large distance interconnected grids, to energy efficient applications in distribution system, energy storage systems and local loads as a local grid, is gaining more interests due to its potential

Chaudhary, Sanjay

337

Improving Indoor Environmental Quality And Energy Performance Of Modular Classroom HVAC Systems  

E-Print Network [OSTI]

INDOOR ENVIRONMENTAL QUALITY AND ENERGY PERFORMANCE OFINDOOR ENVIRONMENTAL QUALITY AND ENERGY PERFORMANCE OFEnergy efficiency and indoor environmental quality (IEQ) are

Apte, Michael G.; Spears, Michael; Lai, Chi-Ming; Shendell, Derek G.

2005-01-01T23:59:59.000Z

338

Semantic Information Integration for Smart Grid Applications  

Science Journals Connector (OSTI)

The Los Angeles Smart Grid Project aims to use informatics techniques to bring about a quantum leap in the way demand response load optimization is performed in utilities. Semantic...

Yogesh Simmhan; Qunzhi Zhou; Viktor Prasanna

2011-01-01T23:59:59.000Z

339

Community Training: Partitioning Schemes in Good Shape for Federated Data Grids  

E-Print Network [OSTI]

Community Training: Partitioning Schemes in Good Shape for Federated Data Grids Tobias Scholl.lastname @in.tum.de Abstract In federated Data Grids, individual institutions share their data sets within improves data access within federated Data Grids and can be combined with well-established Grid methods

Kemper, Alfons

340

Sandia National Laboratories: Grid Integration  

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

of renewable energy technology programs (Wind, Concentrating Solar Power, Geothermal, and Energy Systems Analysis). Transmission Grid Integration Distribution Grid Integration...

Note: This page contains sample records for the topic "improve grid performance" 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

Improving process performances in coal gasification for power and synfuel production  

SciTech Connect (OSTI)

This paper is aimed at developing process alternatives of conventional coal gasification. A number of possibilities are presented, simulated, and discussed in order to improve the process performances, to avoid the use of pure oxygen, and to reduce the overall CO{sub 2} emissions. The different process configurations considered include both power production, by means of an integrated gasification combined cycle (IGCC) plant, and synfuel production, by means of Fischer-Tropsch (FT) synthesis. The basic idea is to thermally couple a gasifier, fed with coal and steam, and a combustor where coal is burnt with air, thus overcoming the need of expensive pure oxygen as a feedstock. As a result, no or little nitrogen is present in the syngas produced by the gasifier; the required heat is transferred by using an inert solid as the carrier, which is circulated between the two modules. First, a thermodynamic study of the dual-bed gasification is carried out. Then a dual-bed gasification process is simulated by Aspen Plus, and the efficiency and overall CO{sub 2} emissions of the process are calculated and compared with a conventional gasification with oxygen. Eventually, the scheme with two reactors (gasifier-combustor) is coupled with an IGCC process. The simulation of this plant is compared with that of a conventional IGCC, where the gasifier is fed by high purity oxygen. According to the newly proposed configuration, the global plant efficiency increases by 27.9% and the CO{sub 2} emissions decrease by 21.8%, with respect to the performances of a conventional IGCC process. 29 refs., 7 figs., 5 tabs.

M. Sudiro; A. Bertucco; F. Ruggeri; M. Fontana [University of Padova, Milan (Italy). Italy and Foster Wheeler Italiana Spa

2008-11-15T23:59:59.000Z

342

Performance improvement of silicon nitride ball bearings by ion implantation. CRADA final report  

SciTech Connect (OSTI)

The present report summarizes technical results of CRADA No. ORNL 92-128 with the Pratt and Whitney Division of United Technologies Corporation. The stated purpose of the program was to assess the 3effect of ion implantation on the rolling contact performance of engineering silicon nitride bearings, to determine by post-test analyses of the bearings the reasons for improved or reduced performance and the mechanisms of failure, if applicable, and to relate the overall results to basic property changes including but not limited to swelling, hardness, modulus, micromechanical properties, and surface morphology. Forty-two control samples were tested to an intended runout period of 60 h. It was possible to supply only six balls for ion implantation, but an extended test period goal of 150 h was used. The balls were implanted with C-ions at 150 keV to a fluence of 1.1 {times} 10{sup 17}/cm{sup 2}. The collection of samples had pre-existing defects called C-cracks in the surfaces. As a result, seven of the control samples had severe spalls before reaching the goal of 60 h for an unacceptable failure rate of 0.003/sample-h. None of the ion-implanted samples experienced engineering failure in 150 h of testing. Analytical techniques have been used to characterize ion implantation results, to characterize wear tracks, and to characterize microstructure and impurity content. In possible relation to C-cracks. It is encouraging that ion implantation can mitigate the C-crack failure mode. However, the practical implications are compromised by the fact that bearings with C-cracks would, in no case, be acceptable in engineering practice, as this type of defect was not anticipated when the program was designed. The most important reason for the use of ceramic bearings is energy efficiency.

Williams, J.M. [Oak Ridge National Lab., TN (United States); Miner, J. [United Technologies Corp., West Palm Beach, FL (United States). Pratt and Whitney Div.

1998-03-01T23:59:59.000Z

343

Improving central heating plant performance at the defense construction supply center (DCSC): Advanced operation and maintenance methods. Final report  

SciTech Connect (OSTI)

A 1987 air pollution emissions test done by the U.S. Army Environmental Hygiene Agency (USAEHA) identified several problems with the central heating plant (CHP) at the Defense Construction Supply Center (DCSC), Columbus, OH. Though DCSC repaired the specified problems, improved coal specifications, and tried to reduce air infiltration, CHP performance remained at unacceptable levels. Consequently, DCSC contracted the U.S. Army Construction Engineering Research Laboratories (USACERL) to apply advanced operation and maintenance procedures to improve its combustion system. This study employed a system-wide approach to evaluate the CHP 5 fuel storage, combustion, heat distribution, and the control of air emissions. Many short-term improvements to the CHP were identified and tested. Subsequent combustion and air emissions tests revealed that the recommended improvements successfully increased CHP efficiency. Long-term improvements were also recommended to help maintain the short-term improvements.

Savoie, M.J.; Standerfer, J.; Schmidt, C.M.; Gostich, J.; Mignacca, J.

1994-11-01T23:59:59.000Z

344

Transdisciplinary electric power grid science  

E-Print Network [OSTI]

The 20th-century engineering feat that most improved the quality of human life, the electric power system, now faces discipline-spanning challenges that threaten that distinction. So multilayered and complex that they resemble ecosystems, power grids face risks from their interdependent cyber, physical, social and economic layers. Only with a holistic understanding of the dynamics of electricity infrastructure and human operators, automatic controls, electricity markets, weather, climate and policy can we fortify worldwide access to electricity.

Brummitt, Charles D; Dobson, Ian; Moore, Cristopher; D'Souza, Raissa M

2013-01-01T23:59:59.000Z

345

Advanced Aerodynamic Devices to Improve the Performance, Economics, Handling, and Safety of Heavy Vehicles  

SciTech Connect (OSTI)

Research is being conducted at the Georgia Tech Research Institute (GTRI) to develop advanced aerodynamic devices to improve the performance, economics, stability, handling and safety of operation of Heavy Vehicles by using previously-developed and flight-tested pneumatic (blown) aircraft technology. Recent wind-tunnel investigations of a generic Heavy Vehicle model with blowing slots on both the leading and trailing edges of the trailer have been conducted under contract to the DOE Office of Heavy Vehicle Technologies. These experimental results show overall aerodynamic drag reductions on the Pneumatic Heavy Vehicle of 50% using only 1 psig blowing pressure in the plenums, and over 80% drag reductions if additional blowing air were available. Additionally, an increase in drag force for braking was confirmed by blowing different slots. Lift coefficient was increased for rolling resistance reduction by blowing only the top slot, while downforce was produced for traction increase by blowing only the bottom. Also, side force and yawing moment were generated on either side of the vehicle, and directional stability was restored by blowing the appropriate side slot. These experimental results and the predicted full-scale payoffs are presented in this paper, as is a discussion of additional applications to conventional commercial autos, buses, motor homes, and Sport Utility Vehicles.

Robert J. Englar

2001-05-14T23:59:59.000Z

346

Multi-strike ignition to improve performance, reduce misfiring of large gas engines  

SciTech Connect (OSTI)

New product and application information is now available on the advanced `CPU-2OOO` digital ignition system introduced by Altronic earlier this year for large-bore gas engines and integral compressors. The system is designed to improve performance, reduce misfiring, and be easily retrofitted to existing large-bore engines. including those that are being converted to lean-burn combustion in order to reduce emissions. To do this, the CPU-2OOO system features a selectable multi-striking mode, a selectable energy level and second spark plug cut-off control, a choice of global or individual cylinder timing control, and a high-energy long-duration spark. The 24 Vdc-powered system also offers comprehensive display and communications capabilities, plus system diagnostics and self-test functions. The system uses existing Altronic II-CPU coils, pickups, primary wiring harnesses and other hardware, allowing for easy upgrades of existing II-CPU installations. Also, a detonation avoidance system is being developed as an option for engine protection. Altronic says the field tests have demonstrated the ability of the CPU-20OO system to ignite extra-lean mixtures created when turbochargers are added to engines that previously operated at much richer levels. NO{sub x} emissions have been reduced by as much as 88%, to less than 2.7 g/kWh.

NONE

1995-10-01T23:59:59.000Z

347

Improvement of a turbocharger by-pass valve and impact on performance, controllability, noise and durability  

Science Journals Connector (OSTI)

ABSTRACT Over the past years, the evolution of emission standards as well as the advent of Fuel economy targets has driven the need for higher controllability of boost pressure. This is a strong trend, which will continue to be true for both gasoline and diesel engine applications as we prepare for further evolutions of standards and introduction of fuel economy regulations. While engine boundary conditions have become harsher, fine, accurate and sustainable control of boost is challenging the way mechatronics components are engineered. This requires us to apply a System Engineering approach and improve our understanding of the behaviour of the entire control chain so that we can ultimately influence the design and drive performance at the System level. This paper describes key elements of the kinematic tools developed by Honeywell Turbocharger Technologies in order to optimize turbocharger control solutions. It includes details on CAE applications such as fluid dynamics, flexible multi-body dynamics and thermo-mechanical simulations and how they can be linked together to analyse a complete system. It highlights the importance of understanding the behaviour of the whole control chain from the actuator command to the turbocharger and engine response. The paper presents results from one main examples on a new waste-gate concept for Fixed geometry turbochargers primarily for gasoline applications. This examples show how kinematic tools can be applied to achieve controllability and durability targets while accelerating development cycle time.

L. Toussaint; M. Marques; N. Morand; P. Davies; C. Groves; F. Tomanec; M. Zatko; D. Vlachy; R. Mrazek

2014-01-01T23:59:59.000Z

348

Occurrence reporting and processing system (ORPS) lessons learned: Tools to improve workplace performance  

SciTech Connect (OSTI)

Various Department of Energy (DOE) orders require DOE and DOE contractor personnel to review abnormal events to gain lessons learned information. The term ``event`` is used to mean a real-time occurrence. When reviewing events data, it must be possible to determine what happened and why (including root causes), the impacts, the appropriate corrective actions, and any lessons learned that might be applicable to activities of other operations or contractors. Merely obtaining the information will not prevent occurrence of a similar event; contributing conditions must be corrected. It is important for managers, trainers, and others to learn from the events of others so that they may apply these experiences to their own activities. Reports of events must be analyzed to determine possible applicability to other facilities and/or job functions. Relevant information can then be used to correct defects and improve facilities and operations, thus making them more efficient and safer for all employees. Lessons learned information is particularly helpful in planning employee training and in developing training curriculum and programs. Lessons learned information can be obtained from many sources. It can be found in the Safety Performance Measurement System`s Computerized Accident/Incident Reporting System (CAIRS) module, the S&H Publications module, the Unusual Occurrence Reports module, and the Office of Nuclear Safety ``Operating Experience Weekly Summary.`` One important source of lessons teamed information is the Occurrence Reporting and Processing System (ORPS) database, which contains event data from September 1, 1990, to the present. This report discusses this source.

Commander, S.L.

1992-12-31T23:59:59.000Z

349

Occurrence reporting and processing system (ORPS) lessons learned: Tools to improve workplace performance  

SciTech Connect (OSTI)

Various Department of Energy (DOE) orders require DOE and DOE contractor personnel to review abnormal events to gain lessons learned information. The term event'' is used to mean a real-time occurrence. When reviewing events data, it must be possible to determine what happened and why (including root causes), the impacts, the appropriate corrective actions, and any lessons learned that might be applicable to activities of other operations or contractors. Merely obtaining the information will not prevent occurrence of a similar event; contributing conditions must be corrected. It is important for managers, trainers, and others to learn from the events of others so that they may apply these experiences to their own activities. Reports of events must be analyzed to determine possible applicability to other facilities and/or job functions. Relevant information can then be used to correct defects and improve facilities and operations, thus making them more efficient and safer for all employees. Lessons learned information is particularly helpful in planning employee training and in developing training curriculum and programs. Lessons learned information can be obtained from many sources. It can be found in the Safety Performance Measurement System's Computerized Accident/Incident Reporting System (CAIRS) module, the S H Publications module, the Unusual Occurrence Reports module, and the Office of Nuclear Safety Operating Experience Weekly Summary.'' One important source of lessons teamed information is the Occurrence Reporting and Processing System (ORPS) database, which contains event data from September 1, 1990, to the present. This report discusses this source.

Commander, S.L.

1992-01-01T23:59:59.000Z

350

National Transmission Grid Study  

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

Grid Study Grid Study U.S. Department of Energy The Honorable Spencer Abraham Secretary of Energy May 2002 ii National Transmission Grid Study National Transmission Grid Study i ii National Transmission Grid Study National Transmission Grid Study iii How This Study Was Conducted The National Energy Policy Plan directed the U.S. Department of Energy (DOE) to conduct a study to examine the benefits of establishing a national electricity transmission grid and to identify transmission bottlenecks and measures to address them. DOE began by conducting an independent analysis of U.S. electricity markets and identifying transmission system bottlenecks using DOE's Policy Office Electricity Modeling System (POEMS). DOE's analysis, presented in Section 2, confirms the central role of the nation's transmission

351

Smart Grid Investments Improve Grid reliability, Resilience and...  

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

(AMI) capabilities with outage management systems. They each typically focused on upgrading the feeders and substations that were most vulnerable to outages or had...

352

Distribution Power Flow for Smart Grid Technologies  

SciTech Connect (OSTI)

Smart Grid technologies hold the promise of being able to solve many of the problems currently facing in the electric power industry. However, the large scale deployment of these new technologies has been limited due to an inability to accurately model their effects or to quantify their potential benefits. GridLAB-D is a new open source power system modeling and simulation environment developed by the United States Department of Energy specifically to integrate detailed power systems and end-use models. In order to effectively model the vast array of possible smart grid technologies GridLAB-D was developed as a general simulation environment. This paper describes the basic design concept, the power flow solutions implemented, and a detailed example of the type of analysis that can be performed within the simulation environment in order to support the evaluation of smart grid technologies.

Schneider, Kevin P.; Chassin, David P.; Chen, Yousu; Fuller, Jason C.

2009-03-18T23:59:59.000Z

353

DOE-Supported Technology Passes Scale-Up Test Converting CO DOE-Sponsored Research Improves Gas Turbine Performance  

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

into Valuable Materials into Valuable Materials Publications News Release Release Date: June 17, 2013 DOE-Sponsored Research Improves Gas Turbine Performance DOE Lab Receives Award for Work on Drilling Technology An innovative airfoil manufacturing technology that promises to improve the performance of state-of-the-art gas turbines has been commercialized through research sponsored by the U.S. Department of Energy. Photo courtesy of Mikro Systems, Inc. Washington, D.C. - An innovative airfoil manufacturing technology that promises to improve the performance of state-of-the-art gas turbines has been commercialized through research sponsored by the U.S. Department of Energy (DOE). The technology - which is expected to contribute to cleaner, more reliable and affordable domestic energy production as well as creating new

354

Renewable energy and smart grid principles integration into campus-wide energy strategy at the University of New Mexico  

Science Journals Connector (OSTI)

With a significant percentage of Renewable Energy resources already installed and operational, the University of New Mexico (UNM) campus is identified as an excellent candidate for the implementation of Demand-Response strategies integrated with a modern grid management system. An Energy Control and Management System makes it possible for UNM campus to respond to grid signals in a centrally managed manner, although individual building control systems still perform local energy management functions. This hierarchical response strategy is a model for future grid-interoperable entities of all sizes. We address the existing potential for the UNM campus to interoperate with the outside world and the possibility of altering the electricity use based on external requests from the grid. We also identify infrastructure and information technology improvements that would result in a substantially increased level of interoperability.

O. Lavrova; H. Barsun; R. Burnett; A. Mammoli

2012-01-01T23:59:59.000Z

355

Optical Current Sensors for Electric Power Grid Modernization  

Science Journals Connector (OSTI)

Optical current transducers will advance the modernization of the power grid, because of the economic cost, environmental cost, safety, reliability, and metrology performance...

Rose, Allen H; Blake, Jim

356

2014 Advanced Grid Modeling Peer Review Presentations - Day Two...  

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

Power Grid Optimization under Uncertainty: Formulations, Algorithms, and High-Performance Computing - Victor Zavala, ANL, Jianhui Wang, ANL Chance-constrained OPF and Unit...

357

10 - Improving the environmental performance of heavy-duty vehicles and engines: key issues and system design approaches  

Science Journals Connector (OSTI)

Abstract: This chapter reviews various advanced technologies to improve the efficiency and environmental performance of heavy-duty engines, including design and operating characteristics of key subsystems such as fuel injection, conventional and advanced low-temperature combustion, turbocharging, exhaust gas recirculation (EGR), variable valve actuation (VVA), cooling, aftertreatment, waste heat recovery (WHR), and electronic controls. Engine downsizing, down-speeding, down-breathing, turbocompounding, and air system capability performance are summarized by engine system theoretical analysis and numerical simulation for fuel consumption improvement.

Q. Xin; C.F. Pinzon

2014-01-01T23:59:59.000Z

358

Improved performance of the Boeing/LANL FEL experiment: Extraction efficiency and cavity-length detuning effects  

Science Journals Connector (OSTI)

We observed significant improvement in the performance of the Boeing/LANL free-electron laser (FEL) experiment in the last year. Some of the more graphic demonstrations of this improved performance are presented in the time-resolved optical spectral measurements (streak/spectrometer) and the electron-beam spectral measurements. We have observed an extraction efficiency of about 14% for the uniform wiggler and nearly 1% for the tapered-wiggler experiment. We also present experimental evidence consistent with a sideband instability and its suppression by cavity-length detuning.

A.H. Lumpkin; R.L. Tokar; D.H. Dowell; A.R. Lowrey; A.D. Yeremian; R.E. Justice

1990-01-01T23:59:59.000Z

359

Improving Energy Efficiency through Commissioning: Getting Started with Commissioning, Monitoring, and Maintaining Performance  

E-Print Network [OSTI]

Performance Measurement and Verification Protocol: Conceptssavings. Measurement and Verification (M&V) The process of

Parrish, Kristen

2014-01-01T23:59:59.000Z

360

Enhancing performing characteristics of organic semiconducting films by improved solution processing  

DOE Patents [OSTI]

Improved processing methods for enhanced properties of conjugated polymer films are disclosed, as well as the enhanced conjugated polymer films produced thereby. Addition of low molecular weight alkyl-containing molecules to solutions used to form conjugated polymer films leads to improved photoconductivity and improvements in other electronic properties. The enhanced conjugated polymer films can be used in a variety of electronic devices, such as solar cells and photodiodes.

Bazan, Guillermo C; Moses, Daniel; Peet, Jeffrey; Heeger, Alan J

2014-05-13T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

E-Print Network 3.0 - attention improves performance Sample Search...  

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

Vis. Res. 99 - improves or impairs ... Source: Carrasco, Marisa - Department of Psychology, New York University Collection: Biology and Medicine 2 PLoS Biology |...

362

Support vector machines improve the accuracy of evaluation for the performance of laparoscopic training tasks  

E-Print Network [OSTI]

009-0556-6 Support vector machines improve the accuracy ofand support vector machine [SVM]) were compared. Theevaluation Á Support vector machines Á Training B. Allen (&)

Allen, Brian; Nistor, Vasile; Dutson, Erik; Carman, Greg; Lewis, Catherine; Faloutsos, Petros

2010-01-01T23:59:59.000Z

363

Grid Logging: Best Practices Guide  

SciTech Connect (OSTI)

The purpose of this document is to help developers of Grid middleware and application software generate log files that will be useful to Grid administrators, users, developers and Grid middleware itself. Currently, most of the currently generated log files are only useful to the author of the program. Good logging practices are instrumental to performance analysis, problem diagnosis, and security auditing tasks such as incident tracing and damage assessment. This document does not discuss the issue of a logging API. It is assumed that a standard log API such as syslog (C), log4j (Java), or logger (Python) is being used. Other custom logging API or even printf could be used. The key point is that the logs must contain the required information in the required format. At a high level of abstraction, the best practices for Grid logging are: (1) Consistently structured, typed, log events; (2) A standard high-resolution timestamp; (3) Use of logging levels and categories to separate logs by detail and purpose; (4) Consistent use of global and local identifiers; and (5) Use of some regular, newline-delimited ASCII text format. The rest of this document describes each of these recommendations in detail.

Tierney, Brian L; Tierney, Brian L; Gunter, Dan

2008-04-01T23:59:59.000Z

364

A Static Pattern-Independent Technique for Power Grid Voltage Integrity Verification  

E-Print Network [OSTI]

A Static Pattern-Independent Technique for Power Grid Voltage Integrity Verification Dionysios Design verification must include the power grid. Checking that the voltage on the power grid does) the obviously large size of the power grids for modern high-performance chips, and ii) the difficulty of setting

Najm, Farid N.

365

A Static PatternIndependent Technique for Power Grid Voltage Integrity Verification #  

E-Print Network [OSTI]

A Static Pattern­Independent Technique for Power Grid Voltage Integrity Verification # Dionysios Design verification must include the power grid. Checking that the voltage on the power grid does) the obviously large size of the power grids for modern high­performance chips, and ii) the di#culty of setting

Najm, Farid N.

366

NREL: PVWatts - PVWatts Grid Data Calculator (Version 2)  

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

Grid Data Calculator (Version 2) Grid Data Calculator (Version 2) PVWattsTM Grid Data calculator allows users to select a photovoltaic (PV) system location in the United States from an interactive map. The Grid Data calculator uses hourly typical meteorological year weather data and a PV performance model to estimate annual energy production and cost savings for a crystalline silicon PV system. It allows users to create estimated performance data for any location in the United States or its territories by selecting a site on a 40-km gridded map. The 40-km Grid Data calculator considers data from a climatologically similar typical meteorological year data station and site-specific solar resource and maximum temperature information to provide PV performance estimation. In this version, performance is first calculated for the the nearest TMY2

367

Power grid vulnerability: A complex network approach  

Science Journals Connector (OSTI)

Power grids exhibit patterns of reaction to outages similar to complex networks. Blackout sequences follow power laws as complex systems operating near a critical point. Here the tolerance of electric power grids to both accidental and malicious outages is analyzed in the framework of complex network theory. In particular the quantity known as efficiency is modified by introducing a new concept of distance between nodes. As a result a new parameter called net-ability is proposed to evaluate the performance of power grids. A comparison between efficiency and net-ability is provided by estimating the vulnerability of sample networks in terms of both the metrics.

S. Arianos; E. Bompard; A. Carbone; F. Xue

2009-01-01T23:59:59.000Z

368

Cyber Security & Smart Grid  

E-Print Network [OSTI]

Cyber Security & Smart Grid Jonathan Shapiro Texas Institute The Clean Air Through Energy Efficiency (CATEE) Conference Cyber Security & Smart Grid ESL-KT-11-11-23 CATEE 2011, Dallas, Texas, Nov. 7 ? 9, 2011 Cyber Security and The Smart... and communication protocols. ESL-KT-11-11-23 CATEE 2011, Dallas, Texas, Nov. 7 ? 9, 2011 Smart Grid Systems ?Current Cyber Security Issues ? Advanced Metering Infrastructure (AMI) Security ? The wireless devices are used in the smart meters located...

Shapiro, J.

2011-01-01T23:59:59.000Z

369

Fluorinated Phosphazene Co-solvents for Improved Thermal and Safety Performance in Lithium-Ion Battery Electrolytes  

SciTech Connect (OSTI)

The safety of lithium-ion batteries is coming under increased scrutiny as they are being adopted for large format applications especially in the vehicle transportation industry and for grid-scale energy storage. The primary short-comings of lithium-ion batteries are the flammability of the liquid electrolyte and sensitivity to high voltage and elevated temperatures. We have synthesized a series of non-flammable fluorinated phosphazene liquids and blended them with conventional carbonate solvents. While the use of these phosphazenes as standalone electrolytes is highly desirable, they simply do not satisfy all of the many requirements that must be met such as high LiPF6 solubility and low viscosity, thus we have used them as additives and co-solvents in blends with typical carbonates. The physical and electrochemical properties of the electrolyte blends were characterized, and then the blends were used to build 2032-type coin cells which were evaluated at constant current cycling rates from C/10 to C/1. We have evaluated the performance of the electrolytes by determining the conductivity, viscosity, flash point, vapor pressure, thermal stability, electrochemical window, cell cycling data, and the ability to form solid electrolyte interphase (SEI) films. This paper presents our results on a series of chemically similar fluorinated cyclic phosphazene trimers, the FM series, which has exhibited numerous beneficial effects on battery performance, lifetimes, and safety aspects.

Harry W. Rollins; Mason K. Harrup; Eric J. Dufek; David K. Jamison; Sergiy V. Sazhin; Kevin L. Gering; Dayna L. Daubaras

2014-10-01T23:59:59.000Z

370

Open Grid Forum  

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

Publications and Presentations Galleries ESnet Awards and Honors ESnet Live Blog Home Engineering Services OSCARS OSCARS Standard and Open Grid Forum Engineering Services...

371

Industrial and Grid Security  

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

Industrial and Grid Security Establishing resilient infrastructures that operate when sensors and physical assets are perturbed is an important national objective. Two related LDRD...

372

SMART GRID COMMUNICATIONS.  

E-Print Network [OSTI]

??Smart grid technologies are starting to be the future of electric power systems. These systems are giving the utilities detailed information about their systems in… (more)

Asbery, Christopher W

2012-01-01T23:59:59.000Z

373

Sandia National Laboratories: Grid  

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

technologies continues as transmission planners are required to study these technologies' impact on the grid. Sandia is continuing its efforts to fully develop, validate, and...

374

Tracking performance characterization and improvement of a piezoactuated micropositioning system based on an empirical index  

Science Journals Connector (OSTI)

Motion tracking is an important problem in micropositioning systems dedicated to ultra-precision robotic micromanipulation. This paper investigates the periodic motion tracking performance of a micropositioning system based on an empirical tracking performance ... Keywords: Micromanipulator, Motion control, Performance characterization, Piezoelectric actuation, Robust control, System identification

Qingsong Xu; Yangmin Li

2010-12-01T23:59:59.000Z

375

Reduced Graphene Oxide Wrapped FeS Nanocomposite for Lithium-Ion Battery Anode with Improved Performance  

Science Journals Connector (OSTI)

Reduced Graphene Oxide Wrapped FeS Nanocomposite for Lithium-Ion Battery Anode with Improved Performance ... A new nanocomposite formulation of the FeS-based anode for lithium-ion batteries is proposed, where FeS nanoparticles wrapped in reduced graphene oxide (RGO) are produced via a facile direct-precipitation approach. ...

Ling Fei; Qianglu Lin; Bin Yuan; Gen Chen; Pu Xie; Yuling Li; Yun Xu; Shuguang Deng; Sergei Smirnov; Hongmei Luo

2013-05-14T23:59:59.000Z

376

Improvement of pin-type amorphous silicon solar cell performance by employing double silicon-carbide p-layer structure  

E-Print Network [OSTI]

Improvement of pin-type amorphous silicon solar cell performance by employing double silicon-carbide Received 30 October 2003; accepted 18 November 2003 We investigated a double silicon-carbide p-layer structure consisting of a undiluted p-type amorphous silicon-carbide (p-a-SiC:H) window layer and a hydrogen

Kim, Yong Jung

377

Improving the Control Performance of an Organic Rankine Cycle System for Waste Heat Recovery from a Heavy-Duty  

E-Print Network [OSTI]

Improving the Control Performance of an Organic Rankine Cycle System for Waste Heat Recovery from and efficiency of those systems. The system considered here is an Organic Rankine Cycle (ORC) for recovering internal combustion engines presented in [1]. The system considered here is an Organic Rankine Cycle (ORC

Paris-Sud XI, Université de

378

Genetic algorithms for door-assigning and sequencing of trucks at distribution centers for the improvement of operational performance  

Science Journals Connector (OSTI)

In a supply chain, cross docking is one of the most innovative systems for improving the operational performance at distribution centers. By utilizing this cross docking system, products are delivered to the distribution center via inbound trucks and ... Keywords: Distribution center, Genetic algorithm, Supply chain, Truck scheduling

Kangbae Lee; Byung Soo Kim; Cheol Min Joo

2012-12-01T23:59:59.000Z

379

can significantly improve the performance of colour-conversion In addition to applications as efficient colour converters, nano-  

E-Print Network [OSTI]

that the `energy- transfer pumping' scheme studied here provides carrier inflow that can in principle compete. The latter value is comparable to the carrier inflow rate provided by energy transfer from the quantum wellcan significantly improve the performance of colour-conversion devices. In addition to applications

Pierrehumbert, Raymond

380

WHAT THE SMART GRID MEANS TO AMERICANS | Department of Energy  

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

WHAT THE SMART GRID MEANS TO AMERICANS WHAT THE SMART GRID MEANS TO AMERICANS WHAT THE SMART GRID MEANS TO AMERICANS The U.S. Department of Energy (DOE) is charged under the Energy Independence and Security Act of 2007 (EISA 2007) with modernizing the nation's electricity grid to improve its reliability and efficiency. As part of this effort, DOE is also responsible for increasing awareness of our nation's Smart Grid. Building upon The Smart Grid: An Introduction, a DOE-sponsored publication released in 2008 and available online at www.smartgrid.gov, this publication is one in a series of books designed to better acquaint discrete stakeholder groups with the promise and possibilities of the Smart Grid. Stakeholder groups include Utilities, Regulators, Policymakers, Technology Providers, Consumer

Note: This page contains sample records for the topic "improve grid performance" 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

Protecting the Nation's Electric Grid from Cyber Threats | Department of  

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

Protecting the Nation's Electric Grid from Cyber Threats Protecting the Nation's Electric Grid from Cyber Threats Protecting the Nation's Electric Grid from Cyber Threats January 11, 2012 - 11:28am Addthis A smarter, modernized, and more secure grid will be pivotal to the United States’ world leadership in a clean energy future. | Photo courtesy of National Renewable Energy Laboratory. A smarter, modernized, and more secure grid will be pivotal to the United States' world leadership in a clean energy future. | Photo courtesy of National Renewable Energy Laboratory. Howard A. Schmidt White House Cybersecurity Coordinator Secretary Steven Chu: "Establishing a comprehensive cybersecurity approach will give utility companies and grid operators another important tool to improve the grid's ability to respond to cybersecurity risks."

382

Fact Sheet: Grid-Scale Energy Storage Demonstration Using UltraBattery Technology (October 2012)  

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

East Penn Manufacturing East Penn Manufacturing American Recovery and Reinvestment Act (ARRA) Grid-Scale Energy Storage Demonstration Using UltraBattery ® Technology Demonstrating new lead-acid battery and capacitor energy storage technology to improve grid performance East Penn Manufacturing, through its subsidiary Ecoult, has designed and constructed an energy storage facility consisting of an array of UltraBattery ® modules integrated in a turnkey battery energy storage system. The UltraBattery ® technology is a significant breakthrough in lead-acid energy storage technology. It is a hybrid device containing both an ultracapacitor and a battery in a common electrolyte, providing significant advantages over traditional energy storage devices. The system is selling up to 3 MW of frequency regulation to PJM Interconnection's grid.

383

Biotechnology in the potential practical application of somatotrophic hormones for improving animal performance  

E-Print Network [OSTI]

Biotechnology in the potential practical application of somatotrophic hormones for improving animal-1566, Switzerland. Summary. The use of biotechnology now allows adequate supplies of previously scarce, together with rapid advances in biotechnology, have produced an environment for potentially exciting

Paris-Sud XI, Université de

384

Performance and design improvements toward the commercialization of a needle-free jet injector/  

E-Print Network [OSTI]

In the past years, the BioInstrumentation Lab has developed a handheld needle-free jet injector based on a custom Lorentz-force motor. While the current handheld design is effective as a research tool, many improvements ...

Modak, Ashin (Ashin Pramod)

2013-01-01T23:59:59.000Z

385

NREL: Wind Research - Utility Grid Integration Assessment  

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

Utility Grid Integration Assessment Utility Grid Integration Assessment Photo of large power transmission towers set against a sunset. The national need for transmission improvements will have a direct impact on the effective use of renewable energy sources such as wind. For wind energy to play a larger role in supplying the nation's energy needs, integrating wind energy into the power grid of the United States is an important challenge to address. NREL's transmission grid integration staff collaborates with utility industry partners and provides data, analysis, and techniques to increase utility understanding of integration issues and confidence in the reliability of new wind turbines. For more information, contact Brian Parsons at 303-384-6958. Printable Version Wind Research Home Capabilities

386

NREL: Water Power Research - Grid Integration  

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

Grid Integration Grid Integration High-voltage transmission lines and towers silouetted against a blue sky with the first glow of the rising sun on the horizon behind them. The national need for transmission improvements will have a direct impact on the effective use of renewable energy sources. For marine and hydrokinetic technologies to play a larger role in supplying the nation's energy needs, integration into the U.S. power grid is an important challenge to address. Efficient integration of variable power resources like water power is a critical part of the deployment planning and commercialization process. Variable and weather-dependent resources can create operational concerns for grid operators. These concerns include conventional generation ramping, load/generation balancing, and planning

387

Research on the Dynamic Fuzzy Neural Network Control of Mine Power Grid Chaotic Oscillation System  

Science Journals Connector (OSTI)

The phenomenon of bifurcation and chaos occurs in mine power grid under certain conditions, showing as seemingly irregular ... a theoretical guidance to improving the stability of power grid, which is of great si...

Xiangqun Li; Hailin Pu; Hao Liu; Jianfeng Liu…

2012-01-01T23:59:59.000Z

388

Smart Grid | OpenEI Community  

Open Energy Info (EERE)

out, brown out, bulk power system, electricity grid, future grid, grid history, security, Smart Grid, transmission Dc The Internet of Things Helping Utilities Posted by: Dc 16 Oct...

389

Smart Grid Primer (Smart Grid Books) | Department of Energy  

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

Educational Resources » Smart Grid Primer Educational Resources » Smart Grid Primer (Smart Grid Books) Smart Grid Primer (Smart Grid Books) Smart Grid Primer (Smart Grid Books) "The Smart Grid: An Introduction," prepared 2008, is a publication sponsored by DOE's Office of Electricity Delivery and Energy Reliability that explores - in layman's terms - the nature, challenges, opportunities and necessity of Smart Grid implementation. Additional books, released in 2009, target the interests of specific stakeholder groups: Consumer Advocates, Utilities, Technology Providers, Regulators, Policy Makers, and Environmental Groups, to explain in greater detail what the Smart Grid will mean to each. General Public The Smart Grid: An Introduction Consumer Advocates What the Smart Grid Means to Americans

390

Smart Grid Week: Working to Modernize the Nation's Electric Grid |  

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

Smart Grid Week: Working to Modernize the Nation's Electric Grid Smart Grid Week: Working to Modernize the Nation's Electric Grid Smart Grid Week: Working to Modernize the Nation's Electric Grid June 3, 2013 - 11:00am Addthis Introducing Smart Grid Week. | Photo courtesy of Pacific Northwest National Laboratory. Introducing Smart Grid Week. | Photo courtesy of Pacific Northwest National Laboratory. Erin R. Pierce Erin R. Pierce Digital Communications Specialist, Office of Public Affairs Learn More about the Smart Grid Visit smartgrid.gov for access to videos, maps and data on the effort to transform the nation's electric grid. Take a look at A Policy Framework For the 21st Century Grid: A Progress Report, from the White House Office of Science and Technology Policy. Our new Energy.gov series, Smart Grid Week, highlights efforts happening

391

Value of a Smart Grid System  

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

1: Smart Grid Opportunities 1: Smart Grid Opportunities Remarkable things happen when economic forces and new technology converge. Consider how the the Internet -- combined with new, affordable consumer electronics like laptops, cell phones, HDTV, MP3s, etc. -- has fundamentally changed the way in which people live, work and communicate. A broad range of industries have embraced technology in their quest to improve productivity, reduce costs and improve customer service. Today, the energy sector has a unique opportunity to leverage similar transformational possibilities as a as a range of forces converge: * Volatile energy costs * Rising costs of capital, raw materials and labor * Aging infrastructure and workforce * Continuing national security concerns * Increasing environment awareness

392

Improving Building Performance at Urban Scale with a Framework for Real-time Data Sharing  

E-Print Network [OSTI]

approaches for building energy modeling: forward model andbe developed for rapid building energy modeling at the urbanbuilding performance, energy efficiency, energy modeling,

Pang, Xiufeng

2014-01-01T23:59:59.000Z

393

Tennessee: U.S. Automaker Improves Plant’s Performance, Saves Costs  

Office of Energy Efficiency and Renewable Energy (EERE)

Nissan invested $331,000 to implement Superior Energy Performance (including internal staff time), resulting in a payback of just four months.

394

Improve Chilled Water System Performance, Software Tools for Industry, Industrial Technologies Program (ITP) (Fact Sheet)  

SciTech Connect (OSTI)

This fact sheet describes how the Industrial Technologies Program Chilled Water System Analysis Tool (CWSAT) can help optimize the performance of of industrial chilled water systems.

Not Available

2008-12-01T23:59:59.000Z

395

Grid Simulator for Power Quality Assessment of Micro-Grids  

E-Print Network [OSTI]

1 Grid Simulator for Power Quality Assessment of Micro-Grids Joaqu´in Eloy-Garc´iaa , Juan C-to-back to a 380 V three-phase grid and feeding a micro-grid composed of two inverter interfaced distributed of the simulator. Finally, a case study is presented by testing a micro-grid. Index Terms Grid Simulator, Power

Vasquez, Juan Carlos

396

Smart Grid Embedded Cyber Security: Ensuring Security While Promoting Interoperability  

E-Print Network [OSTI]

of Smart Grid devices ? Describe progress made in Smart Grid security ? Propose a more robust approach to SG security ? Describe needs for further research and development ESL-HH-10-08-09 Proceedings of the 17th Symposium for Improving Building Systems...? ? Advanced security methods ? Power analysis for key discovery ? Hardware attacks such as ?decapping? chips ? Developing vulnerability exploits ? Security analysis of smart grid systems & communications ? Reverse engineering ? Penetration testing ? Threat...

Ragsdale, G.

397

Security for grids  

SciTech Connect (OSTI)

Securing a Grid environment presents a distinctive set of challenges. This paper groups the activities that need to be secured into four categories: naming and authentication; secure communication; trust, policy, and authorization; and enforcement of access control. It examines the current state of the art in securing these processes and introduces new technologies that promise to meet the security requirements of Grids more completely.

Humphrey, Marty; Thompson, Mary R.; Jackson, Keith R.

2005-08-14T23:59:59.000Z

398

Improving the Performance of Action Prediction through Identification of Abstract Tasks  

E-Print Network [OSTI]

learning. Introduction Our aim is to solve the prediction problem with a view towards home automation. In automating the home, the inhabitant's future actions can be performed without the inhabitant or user actions can be performed autonomously. Automation will provide a start towards the home adapting

Cook, Diane J.

399

Transdisciplinary electric power grid science  

Science Journals Connector (OSTI)

Transdisciplinary electric power grid science 10.1073/pnas.1309151110...Connections among regions of a power grid spread risk, like in other infrastructures...Tradeoffs of Model Complexity Power grid modeling is not merely an academic...

Charles D. Brummitt; Paul D. H. Hines; Ian Dobson; Cristopher Moore; Raissa M. D'Souza

2013-01-01T23:59:59.000Z

400

Power Grid Growth and Evolution  

Science Journals Connector (OSTI)

This chapter models and analyzes in detail the slow dynamics in power grids. The driving forces for power grid evolutions are identified and then utilized to construct the general evolution model for complex power grids

Shengwei Mei; Xuemin Zhang; Ming Cao

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

Transdisciplinary electric power grid science  

Science Journals Connector (OSTI)

...damage or build distributed generation?). The “smart grid,” which monitors and controls electrical infrastructure...challenge for transdisciplinary power grid science. New smart grid measurement devices provide orders of magnitude more data...

Charles D. Brummitt; Paul D. H. Hines; Ian Dobson; Cristopher Moore; Raissa M. D'Souza

2013-01-01T23:59:59.000Z

402

Smart Grid Data Integrity Attack  

E-Print Network [OSTI]

IEEE Transactions on Smart Grid, vol. 2, no. 2, June [21] O.Malicious Data Attacks on Smart Grid State Estimation:Framework and Roadmap for Smart Grid Interoperability Stan-

Poolla, Kameshwar

2012-01-01T23:59:59.000Z

403

Heating, Ventilating, and Air-Conditioning: Recent Advances in Diagnostics and Controls to Improve Air-Handling System Performance  

SciTech Connect (OSTI)

The performance of air-handling systems in buildings needs to be improved. Many of the deficiencies result from myths and lore and a lack of understanding about the non-linear physical principles embedded in the associated technologies. By incorporating these principles, a few important efforts related to diagnostics and controls have already begun to solve some of the problems. This paper illustrates three novel solutions: one rapidly assesses duct leakage, the second configures ad hoc duct-static-pressure reset strategies, and the third identifies useful intermittent ventilation strategies. By highlighting these efforts, this paper seeks to stimulate new research and technology developments that could further improve air-handling systems.

Wray, Craig; Wray, Craig P.; Sherman, Max H.; Walker, I.S.; Dickerhoff, D.J.; Federspiel, C.C.

2008-02-01T23:59:59.000Z

404

Early-stage power grid analysis for uncertain working modes  

Science Journals Connector (OSTI)

High-performance integrated circuits are now reaching the 100-plus watt regime, and power delivery and power grid signal integrity have become critical. Analyzing the performance of the power delivery system requires knowledge of the current drawn by ... Keywords: Early-stage simulation, power grid, random walk, supply network

Haifeng Qian; S. R. Nassif; S. S. Sapatnekar

2006-11-01T23:59:59.000Z

405

Microsoft PowerPoint - Smart Grid Vision - Egidi.pptx  

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

Ryan Egidi Ryan Egidi Integrated Electric Power Systems 11 th Annual SECA Workshop 11 th Annual SECA Workshop July 27, 2010 Topics * The "Case for Action" * What is the Smart Grid? Th S t Vi * The Systems View * Performance Modes * Principal Characteristics * Key Technology Areas * Metrics 2 * Metrics Case for Action * Today's grid is aging and outmoded U li bilit i ti billi f d ll * Unreliability is costing consumers billions of dollars * Today's grid is vulnerable to attack and natural disaster * An extended loss of today's grid could be catastrophic to * An extended loss of today s grid could be catastrophic to our security, economy and quality of life * Today's grid does not address the 21 st century power supply challenges * Missed opportunity to enjoy the benefits of a Smart Grid Di t bi t

406

A lightweight inverter for off-grid and grid-connected systems  

SciTech Connect (OSTI)

This paper presents a novel bi-directional power processing topology particularly suitable as an inverter for both grid and off-grid alternative energy systems. All semiconductor devices are soft-switched, thereby allowing higher switching frequencies, improving efficiency, and reducing electromagnetic interference (EMI). The topology may utilize a small, light-weight, and inexpensive high-frequency transformer. Experimental results of a 1 kW bi-directional dc-dc converter are presented.

Barone, F. [Univ. of New South Wales, Sydney, New South Wales (Australia). Centre for Photovoltaic Devices and Systems

1994-12-31T23:59:59.000Z

407

Improving TCP Performance over Networks with Wireless Components using ``Probing Devices''  

E-Print Network [OSTI]

, but the actual ``sending window'' never exceeds the minimum of the advertised and congestion window. Standard TCP­Tahoe and TCP­Reno. We show that, this way, standard TCP can improve its per­ formance without requiring any the design limitations of the probing device itself. The aggressive or conservative nature of the probing

Tsaoussidis, Vassilis

408

Smart Grid Interoperability Maturity Model  

SciTech Connect (OSTI)

The integration of automation associated with electricity resources (including transmission and distribution automation and demand-side resources operated by end-users) is key to supporting greater efficiencies and incorporating variable renewable resources and electric vehicles into the power system. The integration problems faced by this community are analogous to those faced in the health industry, emergency services, and other complex communities with many stakeholders. To highlight this issue and encourage communication and the development of a smart grid interoperability community, the GridWise Architecture Council (GWAC) created an Interoperability Context-Setting Framework. This "conceptual model" has been helpful to explain the importance of organizational alignment in addition to technical and informational interface specifications for "smart grid" devices and systems. As a next step to building a community sensitive to interoperability, the GWAC is investigating an interoperability maturity model (IMM) based on work done by others to address similar circumstances. The objective is to create a tool or set of tools that encourages a culture of interoperability in this emerging community. The tools would measure status and progress, analyze gaps, and prioritize efforts to improve the situation.

Widergren, Steven E.; Levinson, Alex; Mater, J.; Drummond, R.

2010-04-28T23:59:59.000Z

409

National Smart Water Grid  

SciTech Connect (OSTI)

The United States repeatedly experiences floods along the Midwest's large rivers and droughts in the arid Western States that cause traumatic environmental conditions with huge economic impact. With an integrated approach and solution these problems can be alleviated. Tapping into the Mississippi River and its tributaries, the world's third largest fresh water river system, during flood events will mitigate the damage of flooding and provide a new source of fresh water to the Western States. The trend of increased flooding on the Midwest's large rivers is supported by a growing body of scientific literature. The Colorado River Basin and the western states are experiencing a protracted multi-year drought. Fresh water can be pumped via pipelines from areas of overabundance/flood to areas of drought or high demand. Calculations document 10 to 60 million acre-feet (maf) of fresh water per flood event can be captured from the Midwest's Rivers and pumped via pipelines to the Colorado River and introduced upstream of Lake Powell, Utah, to destinations near Denver, Colorado, and used in areas along the pipelines. Water users of the Colorado River include the cities in southern Nevada, southern California, northern Arizona, Colorado, Utah, Indian Tribes, and Mexico. The proposed start and end points, and routes of the pipelines are documented, including information on right-of-ways necessary for state and federal permits. A National Smart Water Grid{trademark} (NSWG) Project will create thousands of new jobs for construction, operation, and maintenance and save billions in drought and flood damage reparations tax dollars. The socio-economic benefits of NWSG include decreased flooding in the Midwest; increased agriculture, and recreation and tourism; improved national security, transportation, and fishery and wildlife habitats; mitigated regional climate change and global warming such as increased carbon capture; decreased salinity in Colorado River water crossing the US-Mexico border; and decreased eutrophication (excessive plant growth and decay) in the Gulf of Mexico to name a few. The National Smart Water Grid{trademark} will pay for itself in a single major flood event.

Beaulieu, R A

2009-07-13T23:59:59.000Z

410

Improving the Performance of Air-Conditioning Systems in an ASEAN Climate  

E-Print Network [OSTI]

This paper describes an analysis of air conditioning performance under hot and humid tropical climate conditions appropriate to the Association of South East Asian Nations (ASEAN) countries. This region, with over 280 million people, has one...

Busch, J. F.; Warren, M. L.

1988-01-01T23:59:59.000Z

411

Development of an improved sodium exposure test cell experiment for characterization of AMTEC electrode performance  

E-Print Network [OSTI]

An investigation into sources of inconsistencies in sodium exposure test cell (SETC) measurements, used to characterize AMTEC electrode performance, was conducted. Development of modifications to the SETC setup and operation was also accomplished...

Fiebig, Bradley Nelson

2012-06-07T23:59:59.000Z

412

Protecting Consumer Privacy while Building a Smarter Grid  

Broader source: Energy.gov [DOE]

Smart grid technologies have the capacity to create tremendous new value for electricity consumers: from advanced IT and communication technologies that improve the overall operation of our nation’s electricity transmission and distribution networks; to smart meters and digital sensors that help utilities quickly identify and minimize the extent of outages when they do occur. In addition, consumers now have the ability to monitor and manage their electricity use in far greater detail by tapping into the data generated by smart meters. Many of these emerging technologies—which provide tremendous benefits not only for the nation’s electric system but for consumers throughout the United States—will result in an increase in the amount of data collected regarding grid operating characteristics, including customer energy use data. As the nation’s electric infrastructure is modernized, it is critically important to ensure that the collection of data is performed in a manner that yields the greatest benefits for consumers, while continuing to rigorously protect their privacy. Much progress has been made toward this goal to date. Earlier this month, the U.S. Department of Energy’s (DOE’s) Office of Electricity Delivery and Energy Reliability, in coordination with the Federal Smart Grid Task Force, finalized a 22-month multi-stakeholder effort to develop a Voluntary Code of Conduct (VCC) for utilities and third parties on protecting electricity consumers’ Customer Data which includes energy usage information.

413

Sandia National Laboratories: Grid Integration  

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

Specialists Conference On July 31, 2014, in DETL, Distribution Grid Integration, Energy, Energy Surety, Facilities, Grid Integration, Infrastructure Security, News, News &...

414

Integrated approach towards the application of horizontal wells to improve waterflooding performance. Quarterly report, January 1--March 31, 1997  

SciTech Connect (OSTI)

The overall purpose of the proposed project is to improve secondary recovery performance of a marginal oil field through the use of an appropriate reservoir management plan. The selection of plan will be based on the detailed reservoir description using an integrated approach. The authors expect that 2 to 5% of the original oil in place will be recovered using this method. This should extend the life of the reservoir by at least 10 years. The project is divided into two stages. In Stage 1 of the project, the authors selected part of the Glenn Pool Field-Self Unit. They conducted cross borehole tomography surveys and formation micro scanner logs through a newly drilled well. By combining the state-of-the-art data with conventional core and log data, they developed a detailed reservoir description based on an integrated approach. After conducting extensive reservoir simulation studies, they evaluated alternate reservoir management strategies to improve the reservoir performance including drilling of a horizontal injection well. They observed that selective completion of many wells followed by an increase in the injection rate was the most feasible option to improve the performance of the Self Unit. This management plan is currently being implemented and the performance is being monitored. Stage 2 of the project will involve selection of part of the same reservoir (Berryhill Unit-Tract 7), development of reservoir description using only conventional data, simulation of flow performance using developed reservoir description, selection of an appropriate reservoir management plan, and implementation of the plan followed by monitoring of reservoir performance.

Kelkar, M.; Liner, C.; Kerr, D.

1997-10-01T23:59:59.000Z

415

Technical and Economic Assessment of Off-grid, Mini-grid and Grid  

Open Energy Info (EERE)

Technical and Economic Assessment of Off-grid, Mini-grid and Grid Technical and Economic Assessment of Off-grid, Mini-grid and Grid Electrification Technologies Jump to: navigation, search Tool Summary Name: Technical and Economic Assessment of Off-grid, Mini-grid and Grid Electrification Technologies Agency/Company /Organization: World Bank Sector: Energy Focus Area: Energy Efficiency Topics: Resource assessment, Technology characterizations Website: siteresources.worldbank.org/EXTENERGY/Resources/336805-1157034157861/E References: Technical and Economic Assessment of Off-grid, Mini-grid and Grid Electrification Technologies[1] Summary "This report is part of the Energy and Water Department's commitment to providing new techniques and knowledge which complement the direct investment and other assistance to electrification as provided by the

416

The role of neuro-fuzzy modelling as a greening technique, in improving the performance of vehicular spark ignition engine  

Science Journals Connector (OSTI)

The spark ignition engine, by far, is the largest source of motive power in the world. Therefore, continuous endeavours to improve its performance are needed to save in fuel consumption and reduce cost. The main goal of this paper is to develop a neuro-fuzzy model for fuel Injection Time (IT) in order to design a neuro-fuzzy controller for improving the performance of the spark ignition engine. The obtained results showed that the developed neuro-fuzzy model is capable of predicting the fuel IT with a mean squared error less than 0.0072. Furthermore, the power produced by the neuro-fuzzy controller has higher values of about 15-73% than the power produced by the PID controller used in the basic engine. The BSFC is reduced by about 2-5% compared to the PID controller.

Mashhour M. Bani Amer; Yousef S.H. Najjar

2010-01-01T23:59:59.000Z

417

Message from the Owner of the Improved Financial Performance Initiative of the Presidents Management Agenda:  

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

I am enthusiastic and proud to be the owner of the Improved Financial Performance initiative of the President's Management Agenda (PMA) in the Department of Energy (DOE). The Department has received clean opinions on its annual financial statements for six straight years with no material internal control weaknesses identified by the auditors. Further, DOE was successful in maintaining its clean opinion for the FY 2004 financial statements while accelerating issuance to 45 days after the end of the fiscal year. For the third quarter of FY 2004, when the Department of Energy received a Green status score on Improved Financial Performance, DOE was one of only five agencies with a Green status score on this initiative. I am enormously proud

418

Grid-based Production  

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

Grid-based Production Grid-based Production Grid-based Production PDSF is a Tier 2 site for ALICE and as such has the infrastructure in place to run automated grid-based ALICE production jobs. The main components of this infrastructure are listed below. Grid-Enabled Storage Elements There are currently a set of 10 servers running XRootD with a total capacity of 720TB. Included in XRootD are the data transfer tools used to transfer the input and output files for the production jobs running at PDSF. In addition to the 10 servers there is also the XRootD redirector which is currently running on pc1801.nersc.gov (pdsf5.nersc.gov). VO Box A VO (Virtual Organization) box is a dedicated node (palicevo1.nersc.gov) that coordinates the production. It runs the grid-monitoring tool MonALISA, the AliEn grid framework software, a Condor-G client and does job

419

Power Grid Analysis and Optimization Using Algebraic Multigrid  

Science Journals Connector (OSTI)

This paper presents a class of power grid analysis and optimization techniques, all of which are based on the algebraic-multigrid (AMG) method. First, a new AMG-based reduction scheme is proposed to improve the efficiency of reducing the problem size ... Keywords: Capacitance, multigrid, optimization, power grid, simulation

Cheng Zhuo; Jiang Hu; Min Zhao; Kangsheng Chen

2008-04-01T23:59:59.000Z

420

Possible Origin of Improved High Temperature Performance of Hydrothermally Aged Cu/Beta Zeolite Catalysts  

SciTech Connect (OSTI)

The hydrothermal stability of Cu/beta NH3 SCR catalysts are explored here. In particular, this paper focuses on the interesting ability of this catalyst to maintain and even enhance high-temperature performance for the "standard" SCR reaction after modest (900 °C, 2 hours) hydrothermal aging. Characterization of the fresh and aged catalysts was performed with an aim to identify possible catalytic phases responsible for the enhanced high temperature performance. XRD, TEM and 27Al NMR all showed that the hydrothermally aging conditions used here resulted in almost complete loss of the beta zeolite structure between 1 and 2 hours aging. While the 27Al NMR spectra of 2 and 10 hour hydrothermally-aged catalysts showed significant loss of a peak associated with tetrahedrally-coordinated Al species, no new spectral features were evident. Two model catalysts, suggested by these characterization data as possible mimics of the catalytic phase formed during hydrothermal aging of Cu/beta, were prepared and tested for their performance in the "standard" SCR and NH3 oxidation reactions. The similarity in their reactivity compared to the 2 hour hydrothermally-aged Cu/beta catalyst suggests possible routes for preparing multi-component catalysts that may have wider temperature windows for optimum performance than those provided by current Cu/zeolite catalysts.

Peden, Charles HF; Kwak, Ja Hun; Burton, Sarah D.; Tonkyn, Russell G.; Kim, Do Heui; Lee, Jong H.; Jen, H. W.; Cavattaio, Giovanni; Cheng, Yisun; Lambert, Christine

2012-04-30T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

Embodied Energy and Off-Grid Lighting  

E-Print Network [OSTI]

solar and wind energy systems. 7 If anticipated improvements in LED lighting system performance (Lighting Africa,

Alstone, Peter

2012-01-01T23:59:59.000Z

422

Access Grid | Argonne National Laboratory  

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

Access Grid Access Grid Access Grid The Access Grid is the ensemble of resources that can be used to support human interaction across the grid. It consists of multimedia display, presentation and interactive environments, interfaces to grid middleware, and interfaces to visualization environments. The Access Grid will support large-scale distributed meetings, collaborative work sessions, seminars, lectures, tutorials and training. The Access Grid design point is group-to-group communication (thus differentiating it from desktop to desktop based tools that focus on individual communication). The Access Grid environment must enable both formal and informal group interactions. Large-format displays integrated with intelligent or active meeting rooms are a central feature of the Access Grid nodes. Access Grid nodes are

423

High Temperature Steam Electrolysis: Demonstration of Improved Long-Term Performance  

SciTech Connect (OSTI)

Long-term performance is an ongoing issue for hydrogen production based on high-temperature steam electrolysis (HTSE). For commercial deployment, solid-oxide electrolysis stacks must achieve high performance with long-term degradation rates of {approx}0.5%/1000 hours or lower. Significant progress has been achieved toward this goal over the past few years. This paper will provide details of progress achieved under the Idaho National Laboratory high temperature electrolysis research program. Recent long-term stack tests have achieved high initial performance with degradation rates less than 5%/khr. These tests utilize internally manifolded stacks with electrode-supported cells. The cell material sets are optimized for the electrolysis mode of operation. Details of the cells and stacks will be provided along with details of the test apparatus, procedures, and results.

J. E. O'Brien; X. Zhang; R. C. O'Brien; G. Tao

2011-11-01T23:59:59.000Z

424

Exploiting the Computational Grid Lecture 1 Globus and the Grid  

E-Print Network [OSTI]

software used. · · The Globus toolkit consists of four key components: · Security ­ handled by Grid Security Infrastructure (GSI) · Resource Management ­ Grid Resource Allocation Manager (GRAM) · Information Services ­ Grid Resource Information Protocol (GRIP) · Data Management ­ Grid FTP · Security is essential

425

Parental effects improve escape performance of juvenile reef fish in a high-CO2 world  

Science Journals Connector (OSTI)

...performance of juvenile reef fish in a high-CO2 world Bridie J. M. Allan 1 Gabrielle M...Torregrande, Oristano, Italy Rising CO2 levels in the oceans are predicted to have...parental effects may reduce the impact of high CO2 on the growth, survival and routine metabolic...

2014-01-01T23:59:59.000Z

426

Improving a robotics framework with real-time and high-performance features  

Science Journals Connector (OSTI)

Middleware has a key role in modern and object-oriented robotics frameworks, which aim at developing reusable, scalable and maintainable systems using different platforms and programming languages. However, complex robotics software falls into the category ... Keywords: data distribution service, middleware, performance, real-time, robotics

Jesús Martínez; Adrián Romero-Garcés; Luis Manso; Pablo Bustos

2010-11-01T23:59:59.000Z

427

The Consistency of Virtual Organizations Enabling Capabilities and Improvements in Knowledge Management Performance  

Science Journals Connector (OSTI)

The success of a virtual organization VO largely depends on the effective collaboration of its members in orchestrating their knowledge, skills, core competences and resources. It enables the VOs to enhance competitive capabilities and respond better ... Keywords: Contingency Theory, Enabling Capabilities, Information and Communication Technology, Knowledge Management, Knowledge Management Performance KMP, Virtual Organization VO

Ali Moeini; Alireza Farmahini Farahani; Ahad Zare Ravasan

2013-04-01T23:59:59.000Z

428

Improving environmental performances of organic spreading technologies through the use of life cycle  

E-Print Network [OSTI]

) is generally used to assess environmental performances of a product or a system. Some agricultural LCA were, France Corresponding author*: marilys.pradel@cemagref.fr Abstract Life Cycle Assessment (LCA into account the direct contributions of agricultural machinery. In this paper, we develop the three step

Boyer, Edmond

429

Understanding the Role of Different Conductive Polymers in Improving the Nanostructured Sulfur Cathode Performance  

E-Print Network [OSTI]

of obstacles, including poor cycle life, low Coulombic efficiency, and low active material utilization.5 Cathode Performance Weiyang Li, Qianfan Zhang, Guangyuan Zheng,§ Zhi Wei Seh, Hongbin Yao, and Yi Cui*,, Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United

Cui, Yi

430

Nanoparticle-induced light scattering for improved performance of quantum-well solar cells  

E-Print Network [OSTI]

performance of InP/InGaAsP quantum-well waveguide solar cells via light scattering from deposited dielectric of quantum wells to ensure high photon absorption efficiency and increased short-circuit current den- sity homojunction device by extending the absorption spectrum to longer wavelengths.6,7 We show here that nor- mally

Yu, Edward T.

431

Alternative fuels for low emissions and improved performance in CI and heavy duty engines  

SciTech Connect (OSTI)

Contents include: Limited durability of the diesel engine with a dual-fuel system on neat sunflower oil; Analysis and testing of a high-pressure micro-compressor; Spark-assisted alcohol operation in a low heat rejection engine; Combustion improvement of heavy-duty methanol engine by using autoignition system; Clean Fleet Alternative Fuels demonstration project; Vehicle fuel economy -- the Clean Fleet Alternative Fuels project; Safety and occupational hygiene results -- Clean Fleet Alternative Fuels project; Vehicle reliability and maintenance -- Clean Fleet Alternative Fuels project; Flammability tests of alcohol/gasoline vapors; Flame luminosity enhancement of neat methanol fuel by non-aromatic hydrocarbon additives; and more.

NONE

1995-12-31T23:59:59.000Z

432

Advanced Energy Retrofit Guide: Practical Ways to Improve Energy Performance; Grocery Stores (Revised) (Book)  

SciTech Connect (OSTI)

The U.S. Department of Energy developed the Advanced Energy Retrofit Guides (AERGs) to provide specific methodologies, information, and guidance to help energy managers and other stakeholders successfully plan and execute energy efficiency improvements. Detailed technical discussion is fairly limited in these guides. Instead, we emphasize actionable information, practical methodologies, diverse case studies, and unbiased evaluations of the most promising retrofit measures for each building type. A series of AERGs is under development, addressing key segments of the commercial building stock. Grocery stores were selected as one of the highest priority sectors, because they represent one of the most energy-intensive market segments.

Hendron, B.

2013-07-01T23:59:59.000Z

433

Graphical Contingency Analysis for the Nation's Electric Grid  

ScienceCinema (OSTI)

PNNL has developed a new tool to manage the electric grid more effectively, helping prevent blackouts and brownouts--and possibly avoiding millions of dollars in fines for system violations. The Graphical Contingency Analysis tool monitors grid performance, shows prioritized lists of problems, provides visualizations of potential consequences, and helps operators identify the most effective courses of action. This technology yields faster, better decisions and a more stable and reliable power grid.

Zhenyu (Henry) Huang

2012-12-31T23:59:59.000Z

434

Quarterly Smart Grid Data available for download on OpenEI | OpenEI  

Open Energy Info (EERE)

Quarterly Smart Grid Data available for download on OpenEI Quarterly Smart Grid Data available for download on OpenEI Home > Groups > OpenEI Community Central Graham7781's picture Submitted by Graham7781(2002) Super contributor 15 March, 2013 - 10:23 data download OpenEI quarterly Smart Grid Smartgrid.gov SmartGrid.gov is a resource for information about the Smart Grid and government-sponsored Smart Grid projects. The information on SmartGrid.gov helps consumers and stakeholders understand the basics of a Smart Grid, and also brings data generated by recipients to the public. That data is key to the long-term success of a true Smart Grid, and you can download it, only on OpenEI. To download the data, visit the datasets section of OpenEI and perform a search on Smart Grid data. You'll find quarterly summaries that represent a

435

grid history | OpenEI Community  

Open Energy Info (EERE)

the grid? black out brown out bulk power system electricity grid future grid grid history security Smart Grid transmission We all rely on it but what do you really know about our...

436

An Environment for Enabling Interactive Grids  

Science Journals Connector (OSTI)

Traditional use of grid computing allows a user to submit batch jobs in a grid environment. We believe, next generation grids will extend the application domain to include interactive graphical sessions. We term such grids interactive grids. In this ...

Vanish Talwar; Sujoy Basu; Raj Kumar

2003-06-01T23:59:59.000Z

437

First Annual GridWeek Conference | Department of Energy  

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

First Annual GridWeek Conference First Annual GridWeek Conference First Annual GridWeek Conference April 26, 2007 - 12:36pm Addthis Thank you, Tom. I'm pleased to be here this afternoon as you discuss a major component of our nation's collective effort to improve our energy security: modernizing our electric grid. My sincere thanks go out to the organizing committee - and our Department of Energy staff - who worked so hard to pull this together. I realize you all have spent the last few days examining the challenges - and the possible solutions - associated with grid modernization so I don't think I have to convince anyone in this room that we have a very real and very serious challenge on our hands. But let me take just a few minutes to examine the current state of affairs with regard to the grid.

438

2010 Smart Grid System Report Available (February 2012) | Department of  

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

2010 Smart Grid System Report Available (February 2012) 2010 Smart Grid System Report Available (February 2012) 2010 Smart Grid System Report Available (February 2012) February 24, 2012 - 2:58pm Addthis The Department of Energy has submitted the 2010 Smart Grid System Report in response to Section 1302 of Title XIII of the Energy Independence and Security Act (EISA), which directs the Secretary of Energy to report to Congress concerning the status of smart grid deployments nationwide and any regulatory or government barriers to continued deployment. This is the second installment of this report to Congress. A smart grid uses digital technology to improve the reliability, security, efficiency, and environmental impact of the electricity system, from large generation through the delivery systems to electricity consumers.

439

Grid-Interactive Renewable Water Heating Economic and Environmental Value  

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

1 1 Grid-Interactive Renewable Water Heating Economic and Environmental Value Grid-interactive renewable water heaters have smart controls that quickly change their charge rate and charge level, factoring in renewable generation and other critical needs of the grid; thereby significantly reducing carbon emissions and bringing a new dimension of conservation and efficiency to the electric grid. The Steffes grid-interactive renewable water heater controller provides utilities with an affordable and effective way to integrate renewable generation into the grid while providing uninterrupted hot water to the consumer. In recent years, many states have set Renewable Portfolio Standards (RPS) to reduce the need for traditional fossil fuel-based power generation, thereby improving our environment and decreasing

440

Automated Grid Disruption Response System: Robust Adaptive Topology Control (RATC)  

SciTech Connect (OSTI)

GENI Project: The RATC research team is using topology control as a mechanism to improve system operations and manage disruptions within the electric grid. The grid is subject to interruption from cascading faults caused by extreme operating conditions, malicious external attacks, and intermittent electricity generation from renewable energy sources. The RATC system is capable of detecting, classifying, and responding to grid disturbances by reconfiguring the grid in order to maintain economically efficient operations while guaranteeing reliability. The RATC system would help prevent future power outages, which account for roughly $80 billion in losses for businesses and consumers each year. Minimizing the time it takes for the grid to respond to expensive interruptions will also make it easier to integrate intermittent renewable energy sources into the grid.

None

2012-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

GridWise Alliance  

Broader source: Energy.gov [DOE]

Presentation—given at the Spring 2009 Federal Utility Partnership Working Group (FUPWG) meeting—discusses the GRIDWISE ALLIANCE including its mission, today and tomorrow's grid, membership, work groups, and key policy initiatives.

442

The gridded electromagnet probe  

E-Print Network [OSTI]

We attempted to measure the anisotropy in the electron distribution function in magnetized plasma by exploiting the adiabatic invariance of the electron's magnetic moment with a probe comprising a grid, a collector, and ...

Shadman, K. (Khashayar), 1972-

2003-01-01T23:59:59.000Z

443

Transmission Grid Integration  

Broader source: Energy.gov [DOE]

The levels of solar energy penetration envisioned by the DOE SunShot Initiative must be interconnected effectively onto the transmission grid. This interconnection requires an in-depth...

444

GRIDS: Grid-Scale Rampable Intermittent Dispatchable Storage  

SciTech Connect (OSTI)

GRIDS Project: The 12 projects that comprise ARPA-E’s GRIDS Project, short for “Grid-Scale Rampable Intermittent Dispatchable Storage,” are developing storage technologies that can store renewable energy for use at any location on the grid at an investment cost less than $100 per kilowatt hour. Flexible, large-scale storage would create a stronger and more robust electric grid by enabling renewables to contribute to reliable power generation.

None

2010-09-01T23:59:59.000Z

445

Improved characterization of reservoir behavior by integration of reservoir performances data and rock type distributions  

SciTech Connect (OSTI)

An integrated geological/petrophysical and reservoir engineering study was performed for a large, mature waterflood project (>250 wells, {approximately}80% water cut) at the North Robertson (Clear Fork) Unit, Gaines County, Texas. The primary goal of the study was to develop an integrated reservoir description for {open_quotes}targeted{close_quotes} (economic) 10-acre (4-hectare) infill drilling and future recovery operations in a low permeability, carbonate (dolomite) reservoir. Integration of the results from geological/petrophysical studies and reservoir performance analyses provide a rapid and effective method for developing a comprehensive reservoir description. This reservoir description can be used for reservoir flow simulation, performance prediction, infill targeting, waterflood management, and for optimizing well developments (patterns, completions, and stimulations). The following analyses were performed as part of this study: (1) Geological/petrophysical analyses: (core and well log data) - {open_quotes}Rock typing{close_quotes} based on qualitative and quantitative visualization of pore-scale features. Reservoir layering based on {open_quotes}rock typing {close_quotes} and hydraulic flow units. Development of a {open_quotes}core-log{close_quotes} model to estimate permeability using porosity and other properties derived from well logs. The core-log model is based on {open_quotes}rock types.{close_quotes} (2) Engineering analyses: (production and injection history, well tests) Material balance decline type curve analyses to estimate total reservoir volume, formation flow characteristics (flow capacity, skin factor, and fracture half-length), and indications of well/boundary interference. Estimated ultimate recovery analyses to yield movable oil (or injectable water) volumes, as well as indications of well and boundary interference.

Davies, D.K.; Vessell, R.K. [David K. Davies & Associates, Kingwood, TX (United States); Doublet, L.E. [Texas A& M Univ., College Station, TX (United States)] [and others

1997-08-01T23:59:59.000Z

446

Rather than resonance, flapping wing flyers may play on aerodynamics to improve performance  

E-Print Network [OSTI]

Saving energy and enhancing performance are secular preoccupations shared by both nature and human beings. In animal locomotion, flapping flyers or swimmers rely on the flexibility of their wings or body to passively increase their efficiency using an appropriate cycle of storing and releasing elastic energy. Despite the convergence of many observations pointing out this feature, the underlying mechanisms explaining how the elastic nature of the wings is related to propulsive efficiency remain unclear. Here we use an experiment with a self-propelled simplified insect model allowing to show how wing compliance governs the performance of flapping flyers. Reducing the description of the flapping wing to a forced oscillator model, we pinpoint different nonlinear effects that can account for the observed behavior ---in particular a set of cubic nonlinearities coming from the clamped-free beam equation used to model the wing and a quadratic damping term representing the fluid drag associated to the fast flapping motion. In contrast to what has been repeatedly suggested in the literature, we show that flapping flyers optimize their performance not by especially looking for resonance to achieve larger flapping amplitudes with less effort, but by tuning the temporal evolution of the wing shape (i.e. the phase dynamics in the oscillator model) to optimize the aerodynamics.

Sophie Ramananarivo; Ramiro Godoy-Diana; Benjamin Thiria

2011-08-29T23:59:59.000Z

447

Review of the Power Grid Model Vulnerability Based on Complex Network Theory  

Science Journals Connector (OSTI)

Topology structure of power grid has intrinsic and substantial characteristics which if once ascertained in the build of the power grid will have crucial impact on its performance. ... paper, some network models ...

Zhiguo Ding; Minrui Fei

2012-01-01T23:59:59.000Z

448

Security Driven Scheduling Model for Computational Grid Using NSGA-II  

Science Journals Connector (OSTI)

Number of software applications demands various levels of security at the time of scheduling in Computational Grid. Grid may offer these securities but may result in the performance degradation due to overhead in...

Rekha Kashyap; Deo Prakash Vidyarthi

2013-12-01T23:59:59.000Z

449

Case Study- The Challenge: Improving the Performance of a Waste-To-Energy Facility  

Broader source: Energy.gov [DOE]

This case study examines how the City of Long Beach, California, was able to improve the operational efficiency of its Southeast Resource Recovery Facility (SERRF), a recycling and solid waste-to-energy plant. To replace inlet damper control and reduce energy consumption, variable frequency drives (VFDs) were installed on the induced draft fans of three boiler systems. As a result of the retrofit, facility energy consumption was reduced by more than 34 percent (3,661,200 kWh per year), and the facility saved more than $329,500 annually. Taking into consideration a $400,000 California Energy Commission grant, the simple net payback for this project was just under 10 months.

450

Incremental performance improvements for a surface-convergency H- ion source  

SciTech Connect (OSTI)

We discuss some of the interventions on LANSCE's surface-conversion negative-hydrogen ion sources to increase reliability; lifetime and output without any major re-design of the machine. LANSCE's source presently delivers a baseline 16 mA, 60 Hz, 12% duty factor beam. We describe how better quality control and processing of tungsten filaments allow the comfortable completion of 28-day run cycles, how improved temperature control of the ion source body yields an increased H{sup -} output, how higher input power through an additional filament allows operations at plasma densities while maintaining the filament lifetime and how adequate electrode biasing inside the source provide some control over the beam Twiss parameters on exit.

Rouleau, Gary [Los Alamos National Laboratory; Chacon - Golcher, Edwin [Los Alamos National Laboratory; Geros, Ernest [Los Alamos National Laboratory; Johnson, Kenneth [Los Alamos National Laboratory; Rybarcyk, Lawrence [Los Alamos National Laboratory; Stelzer, James [Los Alamos National Laboratory; Keller, Roderich [NON LANL; Tarvainen, Olli [NON LANL

2010-11-10T23:59:59.000Z

451

A linear MOSFET regulation system to improve the performance of the booster-ramping power supplies at the APS.  

SciTech Connect (OSTI)

The APS booster ring uses ramping power supplies to power the sextupole, quadrupole, and dipole magnets as the beam energy ramps up linearly to 7 GeV. Due to the circuit topology used, those supplies are unable to follow the linear ramp to the desired accuracy. The best regulation achieved is 0.5% while 0.1 % is desired. In addition to the unsatisfying regulation, those supplies are sensitive to AC line perturbations and are not able to reject AC line noises higher than a few tens of Hertz. To improve the performance, a linear MOSFET regulation system using paralleled MOSFET devices in series with the power supply is proposed. The system uses a real-time current feedback loop to force the MOSFETs to work in the linear operation mode. By using this linear MOSFET regulator, the voltage drop on MOSFETs, and hence the voltage imposed on magnets, can be regulated very quickly. As a result, the regulation of the magnet current can be improved significantly. Experiments and simulation have been performed to verify the proposed method. Results show that, with the linear regulator, the current regulation can be improved to better than 0.1%. Because of the high bandwidth of the linear regulator, it can reduce the harmonic content in the output current as well as reject the AC line disturbance.

Feng, G.; Deriy, B.; Wang, J.; Shang, H.; Xu, S.

2008-01-01T23:59:59.000Z

452

Performance improvement of phenyl acetate as propylene carbonate-based electrolyte additive for lithium ion battery by fluorine-substituting  

Science Journals Connector (OSTI)

Abstract Phenyl acetate (PA) is more stable and much cheaper than vinylene carbonate (VC), a commercial electrolyte additive for graphite anode of lithium ion battery, but its performance needs to be improved. In this paper, we report a new additive, 4-fluorophenyl acetate (4-FPA), which results from the fluorine-substituting of PA. The properties of the formed solid electrolyte interphase (SEI) by 4-FPA are investigated comparatively with PA by molecular energy level calculation, cyclic voltammetry, charge–discharge test, scanning electron microscopy, energy dispersive X-ray spectroscopy, and Fourier transform infrared spectroscopy. It is found that the SEI formed by 4-FPA is more protective than PA, resulting in the improved cyclic stability of lithium ion battery: the capacity retention of LiFePO4/graphite cell after 90 cycles is 92% for 4-FPA but only 84% for PA. The fluorine in 4-FPA makes it more reducible than PA and the fluorine-containing reduction products of 4-FPA are incorporated into the SEI, which contributes to the improved performance.

Bin Li; Yaqiong Wang; Haibin Lin; Xianshu Wang; Mengqing Xu; Yating Wang; Lidan Xing; Weishan Li

2014-01-01T23:59:59.000Z

453

A Bidirectional High-Power-Quality Grid Interface With a Novel Bidirectional Noninverted Buck Boost Converter for PHEVs  

SciTech Connect (OSTI)

Plug-in hybrid electric vehicles (PHEVs) will play a vital role in future sustainable transportation systems due to their potential in terms of energy security, decreased environmental impact, improved fuel economy, and better performance. Moreover, new regulations have been established to improve the collective gas mileage, cut greenhouse gas emissions, and reduce dependence on foreign oil. This paper primarily focuses on two major thrust areas of PHEVs. First, it introduces a grid-friendly bidirectional alternating current/direct current ac/dc dc/ac rectifier/inverter for facilitating vehicle-to-grid (V2G) integration of PHEVs. Second, it presents an integrated bidirectional noninverted buck boost converter that interfaces the energy storage device of the PHEV to the dc link in both grid-connected and driving modes. The proposed bidirectional converter has minimal grid-level disruptions in terms of power factor and total harmonic distortion, with less switching noise. The integrated bidirectional dc/dc converter assists the grid interface converter to track the charge/discharge power of the PHEV battery. In addition, while driving, the dc/dc converter provides a regulated dc link voltage to the motor drive and captures the braking energy during regenerative braking.

Onar, Omer C [ORNL

2012-01-01T23:59:59.000Z

454

Modular condenser replacement at ANO-1 solves operating problems and improves performance  

SciTech Connect (OSTI)

After 22 years of operation, the condenser tube bundles and waterboxes at Arkansas Nuclear One, Unit 1 (ANO-1) had deteriorated significantly, impairing operating performance, reducing condenser reliability and increasing maintenance cost. An extensive condition assessment performed in 1995 revealed a 34% wall loss on the original Admiralty tubing and an erosion rate of 1.7% annually. Additionally, Arkansas Nuclear One was considering an 8% power uprate, which would place additional duty on the main condenser. As a result, it was decided to completely reconstruct the four condenser tube bundles serving the two low-pressure turbines at Arkansas Nuclear One. An evaluation of the available condenser tube materials was performed to determine which material was best suited for service in the single pass, single pressure condenser at ANO-1. All copper based materials were excluded from consideration due to the detrimental effect copper has on secondary chemistry and more specifically steam generator integrity. Titanium and a variety of stainless steel materials were evaluated, and ultimately titanium was selected as the replacement condenser tube material for the rebuilt condenser tube bundles due primarily to its corrosion resistance and extensive operating experience in condenser service. An impressed current cathodic protection system and epoxy waterbox coating was also installed to prevent galvanic corrosion of the carbon steel waterboxes. The cathodic protection system included local alarm indication to alert plant operating staff of any system malfunction that could result in titanium hydrating. A comparison of the heat transfer characteristics of the existing condenser design with Admiralty tubes and a new tube bundle design with titanium tubes concluded that a new tube bundle design was required to optimize the condenser performance and accommodate the anticipated 8% power uprate. This paper will discuss the condenser optimization program from the design state to final installation. Further, it was decided to completely shop fabricate these four titanium tube bundles to minimize the site erection schedule. Each bundle measuring over 44 ft. (13.5 m) long, over 13 ft, (4 m) wide, and nearly 18 ft. (5.5 m) tall, weighed 195,000 lbs (88,450 kg). The weight and size of the bundles created a variety of fabrication, transportation and installation challenges that required extensive advanced planning, scheduling and coordination. The complete installation of the redesigned condenser tube bundles and waterboxes was accomplished during the Fourteenth Refueling Outage of ANO-1 in 1997.

Edgell, D.; Davidian, A.

1999-07-01T23:59:59.000Z

455

Grid adaptation for functional outputs of compressible flow simulations  

E-Print Network [OSTI]

An error correction and grid adaptive method is presented for improving the accuracy of functional outputs of compressible flow simulations. The procedure is based on an adjoint formulation in which the estimated error in ...

Venditti, David Anthony, 1973-

2002-01-01T23:59:59.000Z

456

Improving the performance of the Y-12 fluidized bed contactors: Final report on investigations at the University of Tennessee  

SciTech Connect (OSTI)

Recent tests at The University of Tennessee in Knoxville (UT) have demonstrated improved fluidization performance in a mockup of the Oak Ridge Y-12 Plant fluidized bed with a modified gas distributor. Combining the modified distributor with the recently developed fluidization intensity module is expected to result in substantial operational improvements for the fluidized beds in Building 9212 at Y-12. Important additional benefits coming from the improved operation of the Y-12 fluidized beds will be a reduction in the consumption of reactant gases, a reduction in scrubber waste production, and a reduced need for manual cleaning of the particulate removal system. UT tests have also demonstrated that the tapered wall design traditionally used for the Y-12 fluidized beds does not provide a sufficient improvement in fluidization quality to justify the continued use of this design in place of a more conventional straight-wall configuration. The straight-wall design for replacement beds is expected to result in substantial equipment cost savings. Other operating scenarios that could potentially be used to reduce reactant gas consumption and scrubber waste production have also been considered. These scenarios are documented here for future reference.

Daw, C.S.; Hawk, J.A. [Oak Ridge National Lab., TN (United States)

1993-08-01T23:59:59.000Z

457

Improving Switching Performance of Power MOSFETs Used in High Rep-Rate, Short Pulse, High-Power Pulsers  

SciTech Connect (OSTI)

As their switching and power handling characteristics improve, solid-state devices are finding new applications in pulsed power. This is particularly true of applications that require fast trains of short duration pulses. High voltage (600-1200V) MOSFETs are especially well suited for use in these systems, as they can switch at significant peak power levels and are easily gated on and off very quickly. MOSFET operation at the shortest pulse durations is not constrained by the intrinsic capabilities of the MOSFET, but rather by the capabilities of the gate drive circuit and the system physical layout. This project sought to improve MOSFET operation in a pulsed power context by addressing these issues. The primary goal of this project is to improve the switching performance of power MOSFETs for use in high rep-rate, short pulse, high-power applications by improving the design of the gate drive circuits and the circuit layouts used in these systems. This requires evaluation of new commercial gate drive circuits and upgrading the designs of LLNL-developed circuits. In addition, these circuits must be tested with the fastest available high-voltage power MOSFETs.

Cook, E G

2006-09-19T23:59:59.000Z

458

Improving DOE Project Performance Using the DOD Integrated Master Plan - 12481  

SciTech Connect (OSTI)

DOE O 413 measures a project's progress to plan by the consumption of funding, the passage of time, and the meeting of milestones. In March of 2003, then Under Secretary, Energy, Science, Card received a memo directing the implementation of Project Management and the Project Management Manual, including the Integrated Master Plan and Integrated Master Schedule. This directive states 'the integrated master plan and schedule tie together all project tasks by showing their logical relationships and any constraints controlling the start or finish of each task. This process results in a hierarchy of related functional and layered schedules derived from the Work Breakdown Structure that can be used for monitoring and controlling project progress'. This paper shows how restoring the IMP/IMS paradigm to DOE program management increases the probability of program success in ways not currently available using DOD O 413 processes alone. Using DOE O 413 series guidance, adding the Integrated Master Plan and Integrated Master Schedule paradigm would provide a hierarchical set of performance measures for each 'package of work,' that provides measurable visibility to the increasing maturity of the project. This measurable maturity provides the mechanism to forecast future performance of cost, schedule, and technical outcomes in ways not available using just the activities in DOE O 413. With this information project managers have another tool available to address the issues identified in GAO-07-336 and GAO-09-406. (authors)

Alleman, Glen B. [DOD Programs, Project Time and Cost (United States); Nosbisch, Michael R. [Managing Principle, Western Region, Project Time and Cost (United States)

2012-07-01T23:59:59.000Z

459

A Dynamic Performance Analysis on CANDU Fuel Handling System for Operational Improvement  

SciTech Connect (OSTI)

The dynamic performance of the Fueling Machine (F/M) Heavy Water (D{sub 2}O) supply system for Wolsong Nuclear Power Plant (NPP) was evaluated using Modular Modeling System (MMS) computer code. Parametric study has been carried out to investigate the effects of dual common set pressure and the position change rate of series valve on the dynamic behavior of common header pressure and common bleed valve position during the mode changes of supply pressure. The results show that the introduction of the series valve position demand curve and the dual common header set pressure is effective to attenuate the overshoot of common header pressure during mode changes. This does not lead any adverse effects on the system performance of supply pressure control and heavy water supply to F/M during the mode changes. The dynamic evaluation results of the F/M D{sub 2}O supply system will be used for the new control system parameter settings and help to relieve system operators' burdens during the system operation. (authors)

Jeong Mann Kim; Byung Ryul Jung [Korea Power Engineering Company, Inc, 360 9 Mabuk Dong, Giheung-gu Yongin-si, Gyeonggi-do 449-713 (Korea, Republic of); Wan Kyu Park [Korea Hydro and Nuclear Power Company, 167 Samseong-dong, Kangnam-gu, Seoul 135-791 (Korea, Republic of)

2002-07-01T23:59:59.000Z

460

Control of household refrigerators. Part 2: Alternate control approaches for improving temperature performance and reducing energy use  

SciTech Connect (OSTI)

In Part 1 it was shown that conventional control of household refrigerators is achieved by regulating the distribution of air in the freezer compartment to all other parts of the plant. In Part 2 three alternative approaches to the conventional control of a top-mount refrigerator are presented: variable temperature bandwidths, uncoupled compressor and evaporator fan, and the combination of these two. These allowed the plant to achieve near-ideal control with respect to improved temperature performance in each compartment. Automatic airflow dampers were used with the dual controllers to independently regulate refrigerator compartment temperature. Plant performance was simulated using a model that computes the refrigerant and airflow systems behavior. Together, these alternate configurations and approaches define new control algorithms that reveal the plant's optimal control model for improving performance and energy usage relative to conventional controllers. Results based on model simulations are dependent upon the model's accuracy and validity. However, the model validation studies cited here, though limited in scope, do show agreement between simulation and experimental data for the ambient temperatures and thermal load conditions considered. This suggests that these model results are reasonable, and representative of actual plant behavior under these conditions and configurations for a top-mount style refrigerator plant.

Graviss, K.J.; Collins, R.L.

1999-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

Contingency Visualization for Real-Time Decision Support in Grid Operation  

SciTech Connect (OSTI)

Contingency analysis is a key function in control centers to assess the impact of various combinations of power system component failures based on state estimates. Today's practice analyzes only a limited set of contingency cases and lacks of capabilities in presenting the results in a way that is easy to be understood by grid operators in a short time frame of seconds to minutes. This limits the ability to operate the power grid for better reliability and efficiency. Faster analysis of more cases is required to safely and reliably operate today's power grids which have a less margin and more intermittent renewable energy sources. This paper explores the advancements in high performance computing and visual analytics for improving the computational speed and the information representation in contingency analysis. A framework of advanced contingency analysis is proposed. Case studies using the Western Electricity Coordinating Council (WECC) system are presented to demonstrate the feasibility of the proposed framework. Comparative assessment by real power grid operators has been performed as part of a WECC operator training class. The assessment results demonstrate the validity of the proposed contingency analysis and visualization approach.

Huang, Zhenyu; Chen, Yousu; Greitzer, Frank L.; Eubank, Robert

2011-10-17T23:59:59.000Z

462

Establishment of an Industry-Driven Consortium Focused on Improving the Production Performance of Domestic Stripper Wells  

SciTech Connect (OSTI)

The Pennsylvania State University, under contract to the U.S. Department of Energy (DOE), National Energy Technology Laboratory (NETL) established a national industry-driven Stripper Well Consortium (SWC) that is focused on improving the production performance of domestic petroleum and/or natural gas stripper wells. The consortium creates a partnership with the U.S. petroleum and natural gas industries and trade associations, state funding agencies, academia, and the National Energy Technology Laboratory. This report serves as the eighth quarterly technical progress report for the SWC. Key activities for this reporting period include: (1) Organize and host the 2006 Spring Meeting in State College, PA to review and select projects for SWC co-funding; (2) Participation in the 2006 PA CleanEnergy Expo Energy Theater to air the DVD on ''Independent Oil: Rediscovering American's Forgotten Wells''; (3) New member additions; (4) Improving communications; and (5) Planning of the fall technology meetings.

Joel L. Morrison; Sharon L. Elder

2006-05-01T23:59:59.000Z

463

Establishment of an Industry-Driven Consortium Focused on Improving the Production Performance of Domestic Stripper Wells  

SciTech Connect (OSTI)

The Pennsylvania State University, under contract to the U.S. Department of Energy (DOE), National Energy Technology Laboratory (NETL) has established a national industry-driven Stripper Well Consortium (SWC) that is focused on improving the production performance of domestic petroleum and/or natural gas stripper wells. The consortium creates a partnership with the U.S. petroleum and natural gas industries and trade associations, state funding agencies, academia, and the National Energy Technology Laboratory. This report serves as the seventh quarterly technical progress report for the SWC. Key activities for this reporting period include: (1) Nomination and election of the Executive Council members for the 2006-07 term, (2) Finalize and release the 2006 Request for Proposals (RFP), (3) Invoice and recruit members, (4) Plan for the spring meeting, (5) Improving communication efforts, and (6) Continue distribution of the DVD entitled: ''Independent Oil: Rediscovering American's Forgotten Wells''.

Joel L. Morrison; Sharon L. Elder

2006-04-21T23:59:59.000Z

464

Using Post-Occupancy Evaluation to Inform Design and Improve Performance  

E-Print Network [OSTI]

p p ro a c h e s t o p e rf o rm a n c e actual performance – lighting 0 20 40 60 80 100 Gloria Marshall ES Garrett ES York ES * highest rating in SHW study * Re-site Partial re-site New design %age satisfaction rate ESL-KT-13-12-15 CATEE 2013...: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 0 5 10 15 20 25 30 35 Gloria Marshall ES Garrett ES York ES Actual 25.2 kBTU/sqft/yr Predicted 18.4 kBTU/sqft/yr Actual 23.9 kBTU/sqft/yr Predicted 32.3 kBTU/sqft/yr No energy...

Langer, S.

2013-01-01T23:59:59.000Z

465

Improved resins and novel materials and methods for solid phase extraction and high performance liquid chromatography  

SciTech Connect (OSTI)

Solid-phase extraction (SPE) has grown to be one of the most widely used methods for isolation and preconcentration of a vast range of compounds from aqueous solutions. By modifying polymeric SPE resins with chelating functional groups, the selective uptake of metals was accomplished. The resin, along with adsorbed metals, was vaporized in the ICP and detection of the metals was then possible using either mass or emission spectroscopy. Drug analyses in biological fluids have received heightened attention as drug testing is on the increase both in sports and in the work environment. By using a direct-injection technique, biological fluids can be injected directly into the liquid chromatographic system with no pretreatment. A new surfactant, a sulfonated form of Brij-30 (Brij-S) is shown to prevent the uptake of serum proteins on commercial HPLC columns by forming a thin coating on the silica C18 surface. Excellent separations of eight or more drugs with a wide range of retention times were obtained. The separations had sharper peaks and lower retention times than similar separations performed with the surfactant sodium dodecylsulfate (SDS). Quantitative recovery of a number of drugs with limits of detection near 1 ppm with a 5 {micro}l injection volume were obtained. Finally, a method for solid-phase extraction in a syringe is introduced. The system greatly reduced the volume of solvent required to elute adsorbed analytes from the SPE bed while providing a semi-automated setup. SPE in a syringe consists of a very small bed of resin-loaded membrane packed into a GC or HPLC syringe. After extraction, elution was performed with just a few {micro}l of solvent. This small elution volume allowed injection of the eluent directly from the syringe into the chromatographic system, eliminating the handling problems associated with such small volumes.

Freeze, R.

1997-10-08T23:59:59.000Z

466

GlyQ-IQ: Glycomics Quintavariate-Informed Quantification with High-Performance Computing and GlycoGrid 4D Visualization  

SciTech Connect (OSTI)

Dense LC-MS datasets have convoluted extracted ion chromatograms with multiple chromatographic peaks that cloud the differentiation between intact compounds with their overlapping isotopic distributions, peaks due to insource ion fragmentation, and noise. Making this differentiation is critical in glycomics datasets because chromatographic peaks correspond to different intact glycan structural isomers. The GlyQ-IQ software is targeted chromatography centric software designed for chromatogram and mass spectra data processing and subsequent glycan composition annotation. The targeted analysis approach offers several key advantages to LC-MS data processing and annotation over traditional algorithms. A priori information about the individual target’s elemental composition allows for exact isotope profile modeling for improved feature detection and increased sensitivity by focusing chromatogram generation and peak fitting on the isotopic species in the distribution having the highest intensity and data quality. Glycan target annotation is corroborated by glycan family relationships and in source fragmentation detection. The GlyQ-IQ software is developed in this work (Part 1) and was used to profile N-glycan compositions from human serum LC-MS Datasets. The companion manuscript GlyQ-IQ Part 2 discusses developments in human serum N-glycan sample preparation, glycan isomer separation, and glycan electrospray ionization. A case study is presented to demonstrate how GlyQ-IQ identifies and removes confounding chromatographic peaks from high mannose glycan isomers from human blood serum. In addition, GlyQ-IQ was used to generate a broad N-glycan profile from a high resolution (100K/60K) nESI-LS-MS/MS dataset including CID and HCD fragmentation acquired on a Velos Pro Mass spectrometer. 101 glycan compositions and 353 isomer peaks were detected from a single sample. 99% of the GlyQ-IQ glycan-feature assignments passed manual validation and are backed with high resolution mass spectra and mass accuracies less than 7 ppm.

Kronewitter, Scott R.; Slysz, Gordon W.; Marginean, Ioan; Hagler, Clay D.; Lamarche, Brian L.; Zhao, Rui; Harris, Myanna Y.; Monroe, Matthew E.; Polyukh, Christina A.; Crowell, Kevin L.; Fillmore, Thomas L.; Carlson, Timothy S.; Camp, David G.; Moore, Ronald J.; Payne, Samuel H.; Anderson, Gordon A.; Smith, Richard D.

2014-05-31T23:59:59.000Z

467

Recovery Act Smart Grid Projects | Department of Energy  

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

Recovery Act Smart Grid Projects Recovery Act Smart Grid Projects Recovery Act Smart Grid Projects...

468

A National Grid Energy Storage Strategy - Electricity Advisory Committee -  

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

Grid Energy Storage Strategy - Electricity Advisory Grid Energy Storage Strategy - Electricity Advisory Committee - December 2013 A National Grid Energy Storage Strategy - Electricity Advisory Committee - December 2013 The Electricity Advisory Committee (EAC) represents a wide cross section of electricity industry stakeholders. This document presents the EAC's vision for a national energy storage strategic plan. It provides an outline for guidance, alignment, coordination, and inspiration for governments, businesses, advocacy groups, academics, and others who share a similar vision for energy storage. The strategy addresses applications of electric storage technologies that optimize the performance of the power grid once electric power has been generated and delivered to the network. It aims to provide a framework of

469

Basis for the US Modern Grid Strategy - A Changing World  

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

Importance of Smart Grid to Our Nation's Energy Future Importance of Smart Grid to Our Nation's Energy Future Steve Pullins President, Horizon Energy Group Steve Bossart Senior Manager, National Energy Technology Laboratory Today's Electricity Grid The U.S. electricity grid is an aging infrastructure based largely on designs of the 1950s before the era of the microprocessor and it was mostly constructed in the 1960s and 1970s. Since the 1970s, the U.S. grid has been expanded as needed to meet load growth using the same vintage technologies. The U.S. Department of Energy estimates that 70% of the transmission lines and transformers are over 25 years old and 60% of the circuit breakers are over 30 years old (Lightner, DOE, Jan 2005). The nation's electricity grid is under increasing stress and is being asked to perform functions that it

470

Getting Our Grid Report Card | Department of Energy  

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

Our Grid Report Card Our Grid Report Card Getting Our Grid Report Card November 4, 2010 - 1:02pm Addthis Andy Oare Andy Oare Former New Media Strategist, Office of Public Affairs What does this mean for me? The peer review for OE's Smart Grid program is examining a wide range of projects that research, develop and demonstrate technologies for support 21st century energy sources. We have a 20th century grid that needs to support 21st century energy sources and increasing usage. Want to know how we're doing it? Or what other experts think? This week, the Office of Electricity Delivery and Energy Reliability (OE) is conducting peer reviews for its Smart Grid and Energy Storage programs. The reviews, which are open to the public, invite experts from across the globe to evaluate the performance of OE projects, share best practices and

471

Topology and vulnerability of the Iranian power grid  

Science Journals Connector (OSTI)

Abstract In this paper we investigated the structural properties of the ultra high voltage power transmission network of Iran. We modeled the power grid as a network with 105 nodes and 142 connection links. We found that the Iranian power grid displays a relatively moderate clustering coefficient–much larger than that of corresponding random networks–and small characteristics path length comparable to that of corresponding random networks; i.e. the power grid is a small-world network with exponential degree distribution. Global efficiency was considered as an indicator of grid’s performance and the influence of random and intentional nodal failures on the efficiency was investigated. We also studied the influence of cascaded failures on the largest connected component of the network. The power grid was vulnerable against cascaded failures, which should be considered serious in redesigning the network topology.

Momhammad Ali Saniee Monfared; Mahdi Jalili; Zohreh Alipour

2014-01-01T23:59:59.000Z

472

Renewable Energy Sources Optimization: A Micro-Grid Model Design  

Science Journals Connector (OSTI)

Abstract This paper analyzes the possibility to develop the simple micro-grid model in optimizing the utilization of local renewable energy for on-grid area. The proposed micro-grid model integrates the power plants driven by renewable energy sources employing micro hydro (MHP) and photovoltaic system (PV) which is connected to grid system. This model is analyzed using HOMER and MATLAB software. Based on the load profiles and the availability of water resources, the HOMER simulates the proposed micro-grid model with three options of MHP capacity. The simulation results show that the micro-grid model with the largest capacity MHP produced the lowest energy cost, greatest reduction of CO2 emission, and largest fraction of renewable energy. However, these result required the expensive initial capital cost. In addition, the PV power generation was always recommended with a minimum capacity. Hence, MATLAB results show the performances of the power plants with renewable energy sources were used maximally.

R. Nazir; H.D. Laksono; E.P. Waldi; E. Ekaputra; P. Coveria

2014-01-01T23:59:59.000Z

473

Improved Recovery Boiler Performance Through Control of Combustion, Sulfur, and Alkali Chemistry  

SciTech Connect (OSTI)

This project involved the following objectives: 1. Determine black liquor drying and devolatilization elemental and total mass release rates and yields. 2. Develop a public domain physical/chemical kinetic model of black liquor drop combustion, including new information on drying and devolatilization. 3. Determine mechanisms and rates of sulfur scavenging in recover boilers. 4. Develop non-ideal, public-domain thermochemistry models for alkali salts appropriate for recovery boilers 5. Develop data and a one-dimensional model of a char bed in a recovery boiler. 6. Implement all of the above in comprehensive combustion code and validate effects on boiler performance. 7. Perform gasification modeling in support of INEL and commercial customers. The major accomplishments of this project corresponding to these objectives are as follows: 1. Original data for black liquor and biomass data demonstrate dependencies of particle reactions on particle size, liquor type, gas temperature, and gas composition. A comprehensive particle submodel and corresponding data developed during this project predicts particle drying (including both free and chemisorbed moisture), devolatilization, heterogeneous char oxidation, char-smelt reactions, and smelt oxidation. Data and model predictions agree, without adjustment of parameters, within their respective errors. The work performed under these tasks substantially exceeded the original objectives. 2. A separate model for sulfur scavenging and fume formation in a recovery boiler demonstrated strong dependence on both in-boiler mixing and chemistry. In particular, accurate fume particle size predictions, as determined from both laboratory and field measurements, depend on gas mixing effects in the boilers that lead to substantial particle agglomeration. Sulfur scavenging was quantitatively predicted while particle size required one empirical mixing factor to match data. 3. Condensed-phase thermochemistry algorithms were developed for salt mixtures and compared with sodium-based binary and higher order systems. Predictions and measurements were demonstrated for both salt systems and for some more complex silicate-bearing systems, substantially exceeding the original scope of this work. 4. A multi-dimensional model of char bed reactivity developed under this project demonstrated that essentially all reactions in char beds occur on or near the surface, with the internal portions of the bed being essentially inert. The model predicted composition, temperature, and velocity profiles in the bed and showed that air jet penetration is limited to the immediate vicinity of the char bed, with minimal impact on most of the bed. The modeling efforts substantially exceeded the original scope of this project. 5. Near the completion of this project, DOE withdrew the BYU portion of a multiparty agreement to complete this and additional work with no advanced warning, which compromised the integration of all of this material into a commercial computer code. However, substantial computer simulations of much of this work were initiated, but not completed. 6. The gasification modeling is nearly completed but was aborted near its completion according to a DOE redirection of funds. This affected both this and the previous tasks.

Baxter, Larry L.

2008-06-09T23:59:59.000Z

474

Grid Application for the BaBar Experiment  

SciTech Connect (OSTI)

This paper discusses the use of e-Science Grid in providing computational resources for modern international High Energy Physics (HEP) experiments. We investigate the suitability of the current generation of Grid software to provide the necessary resources to perform large-scale simulation of the experiment and analysis of data in the context of multinational collaboration.

Khan, A.; /Brunel U.; Wilson, F.; /Rutherford

2006-08-14T23:59:59.000Z

475

Case Study - EPB Smart Grid Investment Grant  

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

EPB Smart Grid Investment Grant EPB Smart Grid Investment Grant 1 Smart switches installed in EPB service territory A Smarter Electric Circuit: Electric Power Board of Chattanooga Makes the Switch EPB of Chattanooga, Tennessee, is one of the largest publicly owned providers of electric power in the country. Established in 1935, EPB covers about 600 square miles and serves about 170,000 customers in Tennessee and Georgia. Chattanooga is making its distribution system more robust while improving operations with the deployment of smart grid technologies which will allow EPB to provide continued reliable electric service and respond more effectively to severe weather events, which are frequent in the Southeast. Distribution Automation Investments Make A Difference Partially funded with $111.5 million in Recovery Act stimulus funds awarded by the U.S. Department of

476

ENERGY STAR Using On-site Renewable Energy as the Next Step to Improving Energy Performance and Reducing Emissions  

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

ON-SITE RENEWABLE ENERGY AS THE NEXT STEP ON-SITE RENEWABLE ENERGY AS THE NEXT STEP TO IMPROVING ENERGY PERFORMANCE AND REDUCING EMISSIONS jcpenney has a corporate energy management strategy that includes using energy efficient technologies in its stores and encouraging energy conservation. As part of this strategy, the company also investigated generating electricity through on-site renewable energy. jcpenney is a partner in the U.S. Environmental Protection Agency (EPA) ENERGY STAR Commercial Buildings Program, and has been tracking building energy use since 2006 using EPA's free benchmarking tool, Portfolio Manager. Portfolio Manager provides a 1-100 energy performance score similar to a "miles-per-gallon" metric for vehicle fuel efficiency. Those buildings that achieve an ENERGY STAR score

477

ESTABLISHMENT OF AN INDUSTRY-DRIVEN CONSORTIUM FOCUSED ON IMPROVING THE PRODUCTION PERFORMANCE OF DOMESTIC STRIPPER WELLS  

SciTech Connect (OSTI)

The Pennsylvania State University, under contract to the U.S. Department of Energy (DOE), National Energy Technology Laboratory (NETL), will establish, promote, and manage a national industry-driven Stripper Well Consortium (SWC) that will be focused on improving the production performance of domestic petroleum and/or natural gas stripper wells. The consortium creates a partnership with the U.S. petroleum and natural gas industries and trade associations, state funding agencies, academia, and the National Energy Technology Laboratory. This report serves as the eighth quarterly technical progress report for the SWC. Key activities for this reporting period include: (1) issuing subcontracts, (2) SWC membership class expansion, (3) planning SWC technology transfer meetings, and (4) extending selected 2001 project periods of performance. In addition, a literature search that focuses on the use of lasers, microwaves, and acoustics for potential stripper well applications continued.

Joel L. Morrison

2002-09-27T23:59:59.000Z

478

Reach: A low cost-approach to reducing stack emissions and improving the performance of oil-fired boilers  

SciTech Connect (OSTI)

Improved oil combustion technology, based upon optimization of oil atomizer and flame stabilizer design, has been retrofit to oil-fired boilers to reduce NO{sub x} emissions, particulate matter emissions, and opacity, and to provide operational and performance benefits. This technology, referred to as REACH, can be retrofit to wall-fired and tangential-fired boilers at a cost of less than $0.75/kW, a fraction of the cost of installing new burners. The technology is compatible with conventional NO{sub x} controls such as overfire air, flue gas recirculation, and low-NO{sub x} burners, and can be combined with these techniques to further reduce NO{sub x} emissions. REACH has been applied to eighty boilers representing over 14,000 MW of generating capacity. This paper describes REACH technology, its applicability and cost, and the emissions and performance results achieved in full scale applications.

Giovanni, D.V.; McElroy, M.W.; Kerho, S.E. [Electric Power Technologies, Inc., Menlo Park, CA (United States)

1996-01-01T23:59:59.000Z

479

Welcome to #GridWeek on Energy.gov | Department of Energy  

Energy Savers [EERE]

that consumers are seeing and what comes next. We are also continuing to improve the security of our energy infrastructure and protect the grid from all hazards, including...

480

Improving the Field Performance of Natural Gas Furnaces, Chicago, Illinois (Fact Sheet)  

SciTech Connect (OSTI)

The objective of this project is to examine the impact that common installation practices and age-induced equipment degradation may have on the installed performance of natural gas furnaces, as measured by steady-state efficiency and AFUE. PARR identified twelve furnaces of various ages and efficiencies that were operating in residential homes in the Des Moines Iowa metropolitan area and worked with a local HVAC contractor to retrieve them and test them for steady-state efficiency and AFUE in the lab. Prior to removal, system airflow, static pressure, equipment temperature rise, and flue loss measurements were recorded for each furnace. After removal from the field the furnaces were transported to the Gas Technology Institute (GTI) laboratory, where PARR conducted steady-state efficiency and AFUE testing. The test results show that steady-state efficiency in the field was 6.4% lower than that measured for the same furnaces under standard conditions in the lab, which included tuning the furnace input and air flow rate. Comparing AFUE measured under ASHRAE standard conditions with the label value shows no reduction in efficiency for the furnaces in this study over their 15 to 24 years of operation when tuned to standard conditions. Further analysis of the data showed no significant correlation between efficiency change and the age or the rated efficiency of the furnace.

Rothgeb, S.; Brand, L.

2013-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "improve grid performance" 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

SPINEL-BASED REFRACTORIES FOR IMPROVED PERFORMANCE IN COAL GASIFICATION ENVIRONMENTS  

SciTech Connect (OSTI)

Oak Ridge National Laboratory, in collaboration with refractory manufacturer Minteq International, Inc., academic partner Missouri University of Science and Technology and refractory end users have developed novel refractory systems and techniques to reduce energy consumption of refractory lined vessels. The objective of this U.S. DOE funded project was to address the need for innovative refractory compositions by developing MgO-Al 2O3 spinel gunnable refractory compositions utilizing new aggregate materials, bond systems, protective coatings, and phase formation techniques. Materials have been developed specifically for coal gasification environments and work has been performed to develop and apply low cost coatings using a colloidal approach for protection against attack of the refractory brick by the service environment and to develop a light-weight back-up refractory system to help offset the high thermal conductivity inherent in spinel materials. This paper discusses the systematic development of these materials, laboratory testing and evaluation of these materials, and relevant results achieved toward the reduction of chemical reactions and mechanical degradation by the service environment though compositional and processing modifications.

Hemrick, James Gordon [ORNL; Armstrong, Beth L [ORNL; Rodrigues-Schroer, Angela [Minteq International, Inc.; Colavito, [Minteq International, Inc.; Smith, Jeffrey D [ORNL; O'Hara, Kelley [University of Missouri, Rolla

2013-01-01T23:59:59.000Z

482

An efficient flooding algorithm for improving network performance in optical WDM networks  

Science Journals Connector (OSTI)

In any networking environment, network and resource information has to be maintained periodically for re-routing the traffic. Especially in fault tolerant optical networks, after the faults are detected and recovered, the network topology changes have to be constantly configured for correct light path decisions to be made. In order to maintain correct routing tables and also to prevent blocking of forthcoming calls by the failed connection, the flooding messages have been broadcast to all nodes. When every node in the network floods the messages, problems arise of excessive redundancy of messages, resource contention and signal collision. This causes high protocol overhead and interference with the existing traffic in the networks. In this paper, lazy flooding algorithm is analysed and simulated by comparing the performance of all-flooding method and threshold flooding. Here, instead of flooding for each channel status update, such as to be changed from available to occupy or vice versa, we hold the process of update till it reaches certain points. The simulation results shows that the proposed flooding method achieves reduced blocking probability with increased throughput thereby increasing the scalability of the network.

M. Arunachalam; V. Rajamani

2014-01-01T23:59:59.000Z

483

Glucose oxidase enzyme immobilized porous silica for improved performance of a glucose biosensor  

Science Journals Connector (OSTI)

Abstract High activity of glucose oxidase (GOD) enzyme (immobilized in porous silica particles) is desirable for a better glucose biosensor. In this work, effect of pore diameter of two porous hosts on enzyme immobilization, activity and glucose sensing was compared. The hosts were amine functionalized: (i) microporous silica (NH2-MS) and (ii) mesoporous silica (NH2-SBA-15). Based on whether the dimension of GOD is either larger or smaller than the pore diameter, GOD was immobilized on either external or internal surface of NH2-MS and NH2-SBA-15, with loadings of 512.5 and 634 mg/g, respectively. However, GOD in NH2-SBA-15 gave a higher normalized absolute activity (NAA), which led to an amperometric sensor with a larger linear range of 0.4–13.0 mM glucose. In comparison, GOD in NH2-MS had a lower NAA and a smaller linear range of 0.4–3.1 mM. In fact, the present GOD-NH2-SBA-15 electrode based sensor was better than other MS and SBA-15 based electrodes reported in literature. Thus, achieving only a high GOD loading (as in NH2-MS) does not necessarily give a good sensor performance. Instead, a host with a relatively larger pore than enzyme, together with optimized electrode composition ensures the sensor to be functional in both hyper- and hypoglycemic range.

Anees Y. Khan; Santosh B. Noronha; Rajdip Bandyopadhyaya

2014-01-01T23:59:59.000Z

484

An oxygenating additive for improving the performance and emission characteristics of marine diesel engines  

Science Journals Connector (OSTI)

Diesel engines provide the major power sources for marine transportation and contribute to the prosperity of the worldwide economy. However, the emissions from diesel engines also seriously threaten the environment and are considered one of the major sources of air pollution. The pollutants emitted from marine vessels are confirmed to cause the ecological environmental problems such as the ozone layer destruction, enhancement of the greenhouse effect, and acid rain, etc. Marine diesel engine emissions such as particulate matter and black smoke carry carcinogen components that significantly impact the health of human beings. Investigations on reducing pollutants, in particular particulate matter and nitrogen oxides are critical to human health, welfare and continued prosperity. The addition of an oxygenating agent into fuel oil is one of the possible approaches for reducing this problem because of the obvious fuel oil constituent influences on engine emission characteristics. Ethylene glycol monoacetate was found to be a promising candidate primarily due to its low poison and oxygen-rich composition properties. In this experimental study ethylene glycol monoacetate was mixed with diesel fuel in various proportions to prepare oxygenated diesel fuel. A four-cylinder diesel engine was used to test the engine performance and emission characteristics. The influences of ethylene glycol monoacetate ration to diesel oil, inlet air temperature and humidity parameters on the engine’s speed and torque were considered. The experimental results show that an increase in the inlet air temperature caused an increase in brake specific fuel consumption (BSFC), carbon monoxide, carbon dioxide emission, and exhaust gas temperature, while decreasing the excess air, oxygen and nitrogen oxide emission concentrations. Increasing the inlet air humidity increased the carbon monoxide concentration while the decreased excess air, oxygen and nitrogen oxide emission concentrations. In addition, increasing ethylene glycol monoacetate ratio in the diesel fuel caused an increase in the BSFC while the excess air and oxygen emission concentrations decreased.

C.-Y. Lin; J.-C. Huang

2003-01-01T23:59:59.000Z