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We encourage you to perform a real-time search of NLEBeta
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1

Advanced concepts for controlling energy surety microgrids.  

SciTech Connect (OSTI)

Today, researchers, engineers, and policy makers are seeking ways to meet the world's growing demand for energy while addressing critical issues such as energy security, reliability, and sustainability. Many believe that distributed generators operating within a microgrid have the potential to address most of these issues. Sandia National Laboratories has developed a concept called energy surety in which five of these 'surety elements' are simultaneously considered: energy security, reliability, sustainability, safety, and cost-effectiveness. The surety methodology leads to a new microgrid design that we call an energy surety microgrid (ESM). This paper discusses the unique control requirement needed to produce a microgrid system that has high levels of surety, describes the control system from the most fundamental level through a real-world example, and discusses our ideas and concepts for a complete system.

Menicucci, David F.; Ortiz-Moyet, Juan

2011-05-01T23:59:59.000Z

2

Validation of the CERTS Microgrid Concept The CEC/CERTS MicrogridTestbed  

SciTech Connect (OSTI)

The development of test plans to validate the CERTSMicrogrid concept is discussed, including the status of a testbed.Increased application of Distributed Energy Resources on the Distributionsystem has the potential to improve performance, lower operational costsand create value. Microgrids have the potential to deliver these highvalue benefits. This presentation will focus on operationalcharacteristics of the CERTS microgrid, the partners in the project andthe status of the CEC/CERTS microgrid testbed. Index Terms DistributedGeneration, Distributed Resource, Islanding, Microgrid,Microturbine

Nichols, David K.; Stevens, John; Lasseter, Robert H.; Eto,Joseph H.

2006-06-01T23:59:59.000Z

3

1 Validation of the CERTS Microgrid Concept  

E-Print Network [OSTI]

Abstract—The development of test plans to validate the CERTS Microgrid concept is discussed, including the status of a testbed. Increased application of Distributed Energy Resources on the Distribution system has the potential to improve performance, lower operational costs and create value

Microgrid Testbed; David K. Nichols; John Stevens; Robert H. Lasseter; Joseph H. Eto; Harry T. Vollkommer; Islanding Microgrid Microturbine

4

Integration of Distributed Energy The CERTS MicroGrid Concept  

E-Print Network [OSTI]

Integration of Distributed Energy Resources The CERTS MicroGrid Concept CALIFORNIA ENERGY COMMISSION CONSULTANTREPORT OCTOBER 2003 P500-03-089F Gray Davis, Governor #12;2 CALIFORNIA ENERGY COMMISSION DISCLAIMER This report was prepared as the result of work sponsored by the California Energy Commission

5

Validation of the CERTS Microgrid Concept The CEC/CERTS Microgrid Testbed  

E-Print Network [OSTI]

Distributed Generation, Distributed Resource, Islanding, Microgrid, Microturbine ISTRIBUTED ENERGY RESOURCES (DER) hold promise for solving many issues facing electric utilities.

Nichols, David K.; Stevens, John; Lasseter, Robert H.; Eto, Joseph H.

2006-01-01T23:59:59.000Z

6

Microgrids  

E-Print Network [OSTI]

Abstract--Application of individual distributed generators can cause as many problems as it may solve. A better way to realize the emerging potential of distributed generation is to take a system approach which views generation and associated loads as a subsystem or a “microgrid”. The sources can

Robert H. Lasseter

2002-01-01T23:59:59.000Z

7

Abstract--The concept of microgrid hierarchical control is presented recently. In this paper, a hierarchical scheme is  

E-Print Network [OSTI]

1 1 Abstract-- The concept of microgrid hierarchical control is presented recently. In this paper) in an islanded microgrid. Unbalance compensation is achieved by sending proper control signals to the DGs local unbalance. Index Terms--Distributed generator (DG), hierarchical control, microgrid, secondary control

Vasquez, Juan Carlos

8

Integration of distributed energy resources. The CERTS Microgrid Concept  

SciTech Connect (OSTI)

Evolutionary changes in the regulatory and operational climate of traditional electric utilities and the emergence of smaller generating systems such as microturbines have opened new opportunities for on-site power generation by electricity users. In this context, distributed energy resources (DER)--small power generators typically located at users' sites where the energy (both electric and thermal) they generate is used--have emerged as a promising option to meet growing customer needs for electric power with an emphasis on reliability and power quality. The portfolio of DER includes generators, energy storage, load control, and, for certain classes of systems, advanced power electronic interfaces between the generators and the bulk power provider. This white paper proposes that the significant potential of smaller DER to meet customers' and utilities' needs can be best captured by organizing these resources into MicroGrids.

Lasseter, Robert; Akhil, Abbas; Marnay, Chris; Stephens, John; Dagle, Jeff; Guttromsom, Ross; Meliopoulous, A. Sakis; Yinger, Robert; Eto, Joe

2002-04-01T23:59:59.000Z

9

Why Two Grids Can Be Better Than One: How the CERTS Microgrid...  

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

and improvement of key microgrid components, visit the Microgrids page. Why Two Grids Can Be Better Than One: How the CERTS Microgrid Evolved from Concept to Practice...

10

Abstract Microgrids are a new concept for future energy dis-tribution systems that enable renewable energy integration and  

E-Print Network [OSTI]

distributed generators (DGs) that are usually integrated via power-electronic inverters. In order to enhance generators (DGs) has been significantly improved. Inverter-interfaced DGs can be flexibly deployed in power1 Abstract ­ Microgrids are a new concept for future energy dis- tribution systems that enable

Collins, Emmanuel

11

Modified Microgrid Concept for Rural Electrification in Africa | Open  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating Solar Powerstories onFocus Area Energy Efficiency,GridMinster,MockupsEnergy

12

Facility Microgrids  

SciTech Connect (OSTI)

Microgrids are receiving a considerable interest from the power industry, partly because their business and technical structure shows promise as a means of taking full advantage of distributed generation. This report investigates three issues associated with facility microgrids: (1) Multiple-distributed generation facility microgrids' unintentional islanding protection, (2) Facility microgrids' response to bulk grid disturbances, and (3) Facility microgrids' intentional islanding.

Ye, Z.; Walling, R.; Miller, N.; Du, P.; Nelson, K.

2005-05-01T23:59:59.000Z

13

Microsoft Word - microgrid_for_resilience .docx  

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

System Resiliency and Efficiency The concept of microgrid is not new. For instance, a CHP-based microgrid on UCONN's Storrs Campus has been in operation for five years serving...

14

1 Smart Distribution: Coupled Microgrids  

E-Print Network [OSTI]

Abstract-- The distribution system provides major opportunities for smart grid concepts. One way to approach distribution system problems is to rethinking our distribution system to include the integration of high levels of distributed energy resources, using microgrid concepts. Basic objectives

R. H. Lasseter

15

CERTS Microgrid Laboratory Test Bed  

SciTech Connect (OSTI)

The objective of the CERTS Microgrid Test Bed project was to enhance the ease of integrating energy sources into a microgrid. The project accomplished this objective by developing and demonstrating three advanced techniques, collectively referred to as the CERTS Microgrid concept, that significantly reduce the level of custom field engineering needed to operate microgrids consisting of generating sources less than 100kW. The techniques comprising the CERTS Microgrid concept are: 1) a method for effecting automatic and seamless transitions between grid-connected and islanded modes of operation, islanding the microgrid's load from a disturbance, thereby maintaining a higher level of service, without impacting the integrity of the utility's electrical power grid; 2) an approach to electrical protection within a limited source microgrid that does not depend on high fault currents; and 3) a method for microgrid control that achieves voltage and frequency stability under islanded conditions without requiring high-speed communications between sources. These techniques were demonstrated at a full-scale test bed built near Columbus, Ohio and operated by American Electric Power. The testing fully confirmed earlier research that had been conducted initially through analytical simulations, then through laboratory emulations,and finally through factory acceptance testing of individual microgrid components. The islanding and resychronization method met all Institute of Electrical and Electronics Engineers Standard 1547 and power quality requirements. The electrical protection system was able to distinguish between normal and faulted operation. The controls were found to be robust under all conditions, including difficult motor starts and high impedance faults. The results from these tests are expected to lead to additional testing of enhancements to the basic techniques at the test bed to improve the business case for microgrid technologies, as well to field demonstrations involving microgrids that involve one or more of the CERTS Microgrid concepts. Future planned microgrid work involves unattended continuous operation of the microgrid for 30 to 60 days to determine how utility faults impact the operation of the microgrid and to gage the power quality and reliability improvements offered by microgrids.

Eto, Joe; Lasseter, Robert; Schenkman, Ben; Stevens, John; Klapp, Dave; Volkommer, Harry; Linton, Ed; Hurtado, Hector; Roy, Jean

2009-06-18T23:59:59.000Z

16

1 A Centralized Optimal Energy Management System for Microgrids  

E-Print Network [OSTI]

Abstract — The issue of controlled and reliable integration of distributed energy resources into microgrids and large power grids has recently gained considerable attention. The microgrid concept, which basically corresponds to the coordinated operation of a cluster of loads, distributed generators

Daniel E. Olivares; Claudio A. Cańizares; Mehrdad Kazerani; Senior Member

17

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network [OSTI]

Arnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Microgrid Fault Protection Based;#12;Microgrid Fault Protection Based on Symmetrical and Differential Current Components Prepared for Public............................................................................................................................. 12 2. AEP CERTS MICROGRID

18

Title: Experimental Platform for Novel Distributed Microgrids Control Solutions  

E-Print Network [OSTI]

Title: Experimental Platform for Novel Distributed Microgrids Control Solutions Principal Investigator: Wenxin Liu Sponsor: U.S. Department of Defense Office of Naval Research Summary: Microgrid can, and can operate autonomously without connecting to power grid. The microgrid concept is a big step toward

Johnson, Eric E.

19

Hierarchical Control Scheme for Voltage Unbalance Compensation in Islanded Microgrids  

E-Print Network [OSTI]

Hierarchical Control Scheme for Voltage Unbalance Compensation in Islanded Microgrids Mehdi@et.aau.dk Abstract-- The concept of microgrid hierarchical control is presented, recently. In this paper, a hierarchical scheme which includes primary and secondary control levels is proposed for islanded microgrids

Vasquez, Juan Carlos

20

Shape of the microgrid  

SciTech Connect (OSTI)

Restrictions on expansion of traditional centralized generating and delivery systems may be becoming so tight in the industrialized countries that they cannot reasonably be expected meet future electricity demand growth at acceptable cost. Meanwhile, technological advances, notably improved power electronics that permit grid interconnection of asynchronous generation sources, is tilting the economics of power generation back towards smaller scales, thereby reversing a century long trend towards the central control paradigm. Special power quality requirements or opportunities for combined heat and power applications make on-site generation an even more attractive option for customers. The existence of a significant amount of electricity sources dispersed throughout the low voltage distribution system could create a power system quite different to the one we are familiar with and creating it offers significant research and engineering challenges. Moreover, the electrical and economic relationships between customers and the distribution utility and among customers may take forms quite distinct from those we know today. For example, rather than devices being individually interconnected in parallel with the grid, they may be grouped with loads in a semi-autonomous neighborhood that could be termed a microgrid. A microgrid is a cluster of small (by the standards of current power systems, e.g. < 500 kW) sources, storage systems, and loads which presents itself to the grid as a legitimate single entity. The heart of the microgrid concept is the notion of a flexible, yet controllable electronic interface between the microgrid and the familiar wider power system, or macrogrid. This interface essentially isolates the two sides electrically; and yet connects them economically by allowing delivery and receipt of electrical energy and ancillary services (EE&AS) at the interface. From the customer side of the interface, the microgrid should appear as an autonomous power system meeting the power quality and reliability requirements of the customer. Such issues as local voltage, reliability, losses and quality of power should be those that support the customers' objectives. From the macrogrid side, however, the microgrid should appear as a legitimate entity akin to current interconnected generators or loads. A key distinction between microgrids and our familiar arrangements is the expanded role of electricity endusers in determining the pattern of development of the overall power system, which must not only accommodate purchases and sales of EE&AS to and from established markets but also contractual agreements between microgrids. Fundamentally, the characteristics and capabilities of the microgrid will be determined by its internal requirements together with the technical, economic, and regulatory opportunities and constraints it faces, and not by established objectives for capacity expansion and reliability of the macrogrid. The goal of Consortium for Electric Reliability Technology Solutions (CERTS) work underway at the Berkeley Lab is to anticipate possible patterns of microgrid development that can help focus research efforts on the key technical problems that must be solved to enable microgrid deployment.

Marnay, Chris; Rubio, F. Javier; Siddiqui, Afzal S.

2000-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Microgrid cyber security reference architecture.  

SciTech Connect (OSTI)

This document describes a microgrid cyber security reference architecture. First, we present a high-level concept of operations for a microgrid, including operational modes, necessary power actors, and the communication protocols typically employed. We then describe our motivation for designing a secure microgrid; in particular, we provide general network and industrial control system (ICS)-speci c vulnerabilities, a threat model, information assurance compliance concerns, and design criteria for a microgrid control system network. Our design approach addresses these concerns by segmenting the microgrid control system network into enclaves, grouping enclaves into functional domains, and describing actor communication using data exchange attributes. We describe cyber actors that can help mitigate potential vulnerabilities, in addition to performance bene ts and vulnerability mitigation that may be realized using this reference architecture. To illustrate our design approach, we present a notional a microgrid control system network implementation, including types of communica- tion occurring on that network, example data exchange attributes for actors in the network, an example of how the network can be segmented to create enclaves and functional domains, and how cyber actors can be used to enforce network segmentation and provide the neces- sary level of security. Finally, we describe areas of focus for the further development of the reference architecture.

Veitch, Cynthia K.; Henry, Jordan M.; Richardson, Bryan T.; Hart, Derek H.

2013-07-01T23:59:59.000Z

22

Microgrid Testing  

SciTech Connect (OSTI)

With the publication of IEEE 1574.4 Guide for Design, Operation, and Integration of Distributed Resource Island Systems with Electric Power Systems, there is an increasing amount of attention on not only the design and operations of microgrids, but also on the proper operation and testing of these systems. This standard provides alternative approaches and good practices for the design, operation, and integration of microgrids. This includes the ability to separate from and reconnect to part of the utility grid while providing power to the islanded power system. This presentation addresses the industry need to develop standardized testing and evaluation procedures for microgrids in order to assure quality operation in the grid connected and islanded modes of operation.

Shirazi, M.; Kroposki, B.

2012-01-01T23:59:59.000Z

23

ADAPTIVE NETWORK PROTECTION IN MICROGRIDS  

E-Print Network [OSTI]

directional interlock Microgrids comprise low voltage distribution systems with distributed energy re-sources (DER) and controllable loads which can operate connected to the medium voltage grid or islanded in a controlled coordinated way. This concept aims to move from “connect and forget

Re Oudalova; Antonio Fidigattib

24

Control of Inverter-Connected Sources in Autonomous Microgrids Ian A. Hiskens Eric M. Fleming  

E-Print Network [OSTI]

Control of Inverter-Connected Sources in Autonomous Microgrids Ian A. Hiskens Eric M. Fleming interconnection strate- gies. The resulting microgrid concept allows sub-networks of sources and loads to maintain to a microgrid, explores controller behaviour. The investigation considers disconnection from the main grid

Hiskens, Ian A.

25

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network [OSTI]

...................................................................................... 26 #12;II List Of Figures Figure 1 - CERTS Microgrid Aerial Photo voltage before/after the static switch opened, islanding the microgrid from the utility grid the utility grid............................................................ 13 Figure 29c ­ Meter 3 voltage

26

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network [OSTI]

Arnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Test Plan Section 7.0 Validate upon the accuracy or adequacy of the information in this report. #12;#12;CERTS MICROGRID TEST REPORT.0 MICROGRID TESTBED SETUP......................................................... 2 4.0 PROPOSED TEST PLAN

27

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network [OSTI]

Arnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Test Log Prepared For in this report. #12;#12;DTC Registered Procedure - CERTS Microgrid Test Plan Appendix C: TEST LOG Dolan: Assigned Approved by: K. P. Loving Procedure Review Date: 23 Feb. 2008 Appendix C - "CERTS Microgrid Test

28

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network [OSTI]

Arnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Test Plan Section 8.0 Reduced in this report. #12;#12;CERTS MICROGRID TEST REPORT SECTION 8.0 "Reduced System Tests" #12;I Table of Contents 1.0 MICROGRID TESTBED SETUP......................................................... 2 4.0 PROPOSED TEST PLAN

29

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network [OSTI]

Arnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Tecogen CHP Modules to the CERTS research program for the AEP Microgrid Test Bed. Tecogen subcontracted with Youtility Inc. (Hudson was bench-tested at Youtility both individually, and in pairs as a simulated microgrid. Rather than

30

CERTS Microgrid Laboratory Test Bed - PIER Final Project Report  

SciTech Connect (OSTI)

The objective of the CERTS Microgrid Laboratory Test Bed project was to enhance the ease of integrating small energy sources into a microgrid. The project accomplished this objective by developing and demonstrating three advanced techniques, collectively referred to as the CERTS Microgrid concept, that significantly reduce the level of custom field engineering needed to operate microgrids consisting of small generating sources. The techniques comprising the CERTS Microgrid concept are: 1) a method for effecting automatic and seamless transitions between grid-connected and islanded modes of operation; 2) an approach to electrical protection within the microgrid that does not depend on high fault currents; and 3) a method for microgrid control that achieves voltage and frequency stability under islanded conditions without requiring high-speed communications. The techniques were demonstrated at a full-scale test bed built near Columbus, Ohio and operated by American Electric Power. The testing fully confirmed earlier research that had been conducted initially through analytical simulations, then through laboratory emulations, and finally through factory acceptance testing of individual microgrid components. The islanding and resychronization method met all Institute of Electrical and Electronics Engineers 1547 and power quality requirements. The electrical protections system was able to distinguish between normal and faulted operation. The controls were found to be robust and under all conditions, including difficult motor starts. The results from these test are expected to lead to additional testing of enhancements to the basic techniques at the test bed to improve the business case for microgrid technologies, as well to field demonstrations involving microgrids that involve one or mroe of the CERTS Microgrid concepts.

Eto, Joseph H.; Eto, Joseph H.; Lasseter, Robert; Schenkman, Ben; Klapp, Dave; Linton, Ed; Hurtado, Hector; Roy, Jean; Lewis, Nancy Jo; Stevens, John; Volkommer, Harry

2008-07-25T23:59:59.000Z

31

Making Microgrids Work  

SciTech Connect (OSTI)

Distributed energy resources including distributed generation and distributed storage are sources of energy located near local loads and can provide a variety of benefits including improved reliability if they are properly operated in the electrical distribution system. Microgrids are systems that have at least one distributed energy resource and associated loads and can form intentional islands in the electrical distribution systems. This paper gives an overview of the microgrid operation. Microgrid testing experiences from different counties was also provided.

Kroposki, B.; Lasseter, R.; Ise, T.; Morozumi, S.; Papathanassiou, S.; Hatziargyriou, N.

2008-05-01T23:59:59.000Z

32

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network [OSTI]

equipment operation ... 4.0 Procedures ­ CERTS Microgrid Test Bed Lockout/Tagout 5.0 Procedures ­ General 5

33

Online Energy Generation Scheduling for Microgrids with  

E-Print Network [OSTI]

Online Energy Generation Scheduling for Microgrids with Intermittent Energy Sources and Co entitled: Online Energy Generation Scheduling for Microgrids with Intermittent Energy Sources and Co schedul- ing. However, accurate prediction cannot be guaranteed due to the small scale of microgrids

Zhang, Junshan

34

Webinar Presentation: Energy Storage Solutions for Microgrids...  

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

Presentation: Energy Storage Solutions for Microgrids (November 2012) Webinar Presentation: Energy Storage Solutions for Microgrids (November 2012) On November 7, 2012, Clean...

35

Microgrid: A Conceptual Solution  

E-Print Network [OSTI]

Abstract — Application of individual distributed generators can cause as many problems as it may solve. A better way to realize the emerging potential of distributed generation is to take a system approach which views generation and associated loads as a subsystem or a “microgrid”. During

Robert H. Lasseter; Paolo Piagi

2004-01-01T23:59:59.000Z

36

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network [OSTI]

Closing of Static Switch...... 10 6.1.2 Loss of Utility Source Test...................................................................................... 33 #12;II List Of Figures Figure 1 - CERTS Microgrid Aerial Photo of the static switch, during the transition from island to utility-connected mode................ 12 Figure 5c

37

Microgrids for Rural Electrification  

E-Print Network [OSTI]

microgrids, electricity market design, institutional barriers, and socio-political aspects of technology adoption to inform sound policy and private decision making. Ranjit Deshmukh is a researcher- partment of Engineering and Public Policy. He is the Director of the Carnegie Mellon Electricity Industry

38

2012 Microgrid Workshop Summary Released  

Broader source: Energy.gov [DOE]

The Department of Energy has released the summary report from the July 30-31, 2012 Microgrid Workshop presented by the Office of Electricity Delivery and Energy Reliability at the Illinois Institute of Technology in Chicago. The workshop was held in response to discussions at the preceding DOE Microgrid Workshop, held in August 2011, which called for sharing lessons learned and best practices for system integration from existing projects in the U.S. (including military microgrids) and internationally.

39

Microgrid Activities | Department of Energy  

Energy Savers [EERE]

that focuses on the development and implementation of microgrids to further improve reliability and resiliency of the grid, help communities better prepare for future weather...

40

Project Title: Microgrid Design Toolset  

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

Microgrid Design Toolset Organization: Sandia National Laboratories (with support from LBNL and PNNL) Presenters: Jason Stamp and Kevin Schneider FY 2014 Funding (K): 900k...

Note: This page contains sample records for the topic "modified microgrid concept" 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

System and method for controlling microgrid  

DOE Patents [OSTI]

A system for controlling a microgrid includes microgrid assets and a tieline for coupling the microgrid to a bulk grid; and a tieline controller coupled to the tieline. At least one of the microgrid assets comprises a different type of asset than another one of the microgrid assets. The tieline controller is configured for providing tieline control signals to adjust active and reactive power in respective microgrid assets in response to commands from the bulk grid operating entity, microgrid system conditions, bulk grid conditions, or combinations thereof.

Bose, Sumit (Niskayuna, NY); Achilles, Alfredo Sebastian (Bavaria, DE); Liu, Yan (Ballston Lake, NY); Ahmed, Emad Ezzat (Munich, DE); Garces, Luis Jose (Niskayuna, NY)

2011-07-19T23:59:59.000Z

42

Modeling of Diesel Combustion, Soot and NO Emissions Based on a Modified Eddy Dissipation Concept  

E-Print Network [OSTI]

1 Modeling of Diesel Combustion, Soot and NO Emissions Based on a Modified Eddy Dissipation Concept and soot emissions modeling, computational diesel engine simulations, eddy dissipation concept #12 ignition, combustion, NOx and soot emissions over a wide range of operating conditions in a diesel engine

Im, Hong G.

43

Sandia National Laboratories: Microgrid  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -theErik Spoerke SSLS ExhibitIowaLosSandia ParticipatedBuilding a Microgrid On

44

Dynamics and challenges of microgrids implementation  

E-Print Network [OSTI]

Microgrids have the capability of operating on an island mode as well as an integrated mode with the smart grid, depending on the requirement and objectives. Recently, microgrids projects have gained popularity both in ...

Sabhlok, Vikalp Pal

2013-01-01T23:59:59.000Z

45

Impact of load type on microgrid stability  

E-Print Network [OSTI]

Microgrids show great promise as a means of integrating distributed generation sources into the public grid distribution system. In order to provide uninterrupted,high quality power to local loads, microgrids must have the ...

Monnin, Jared P

2012-01-01T23:59:59.000Z

46

Energy Security: Microgrid Planning and Design (Presentation)  

SciTech Connect (OSTI)

Energy Security: Microgrid Planning and Design presentation to be given at the 2012 WREF in Denver, CO.

Giraldez, J.

2012-05-01T23:59:59.000Z

47

Microgrid Fault Protection Based on Symmetrical and Differential Current Components  

E-Print Network [OSTI]

Microgrid Fault Protection Based on Symmetrical and Differential Current Components Prepared.........................................................................................8 2. AEP CERTS MICROGRID .........................................................................9 ........................................................................67 #12;3 Index of Figures Figure 1: Schematic representation of the AEP CERTS microgrid

48

Energy Department Launches Microgrid Competition to Support Resiliency...  

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

MVP Challenge encourages organizations with operational microgrids, such as hospitals and water treatment plants, to submit their microgrid designs and operational data - such as...

49

Solving Customer-Driven Microgrid Optimization Problems as DCOPs  

E-Print Network [OSTI]

Solving Customer-Driven Microgrid Optimization Problems as DCOPs Saurabh Gupta , Palak Jain common customer-driven microgrid (CDMG) optimization problems ­ a comprehensive CDMG optimization problem

Yeoh, William

50

Distributed Generation Investment by a Microgrid Under Uncertainty  

E-Print Network [OSTI]

option on natural gas generation, which increases in valueL ABORATORY Distributed Generation Investment by a MicrogridORMMES’06 Distributed Generation Investment by a Microgrid

Siddiqui, Afzal; Marnay, Chris

2006-01-01T23:59:59.000Z

51

The Role of Microgrids in Helping to Advance the Nation's Energy...  

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

Smart Grid The Role of Microgrids in Helping to Advance the Nation's Energy System The Role of Microgrids in Helping to Advance the Nation's Energy System Microgrids are...

52

Energy manager design for microgrids  

SciTech Connect (OSTI)

On-site energy production, known as distributed energy resources (DER), offers consumers many benefits, such as bill savings and predictability, improved system efficiency, improved reliability, control over power quality, and in many cases, greener electricity. Additionally, DER systems can benefit electric utilities by reducing congestion on the grid, reducing the need for new generation and transmission capacity, and offering ancillary services such as voltage support and emergency demand response. Local aggregations of distributed energy resources (DER) that may include active control of on-site end-use energy devices can be called microgrids. Microgrids require control to ensure safe operation and to make dispatch decisions that achieve system objectives such as cost minimization, reliability, efficiency and emissions requirements, while abiding by system constraints and regulatory rules. This control is performed by an energy manager (EM). Preferably, an EM will achieve operation reasonably close to the attainable optimum, it will do this by means robust to deviations from expected conditions, and it will not itself incur insupportable capital or operation and maintenance costs. Also, microgrids can include supervision over end-uses, such as curtailing or rescheduling certain loads. By viewing a unified microgrid as a system of supply and demand, rather than simply a system of on-site generation devices, the benefits of integrated supply and demand control can be exploited, such as economic savings and improved system energy efficiency.

Firestone, Ryan; Marnay, Chris

2005-01-01T23:59:59.000Z

53

Control and Power Management of Converter Fed Microgrids  

E-Print Network [OSTI]

1 Control and Power Management of Converter Fed Microgrids Charles K. Sao, Member, IEEE, and Peter in parallel in a VSC fed microgrid. Each current controlled VSC in such a microgrid has its own VPD/FQB controller that sets its current references to regulate the voltage and frequency of a common microgrid bus

Lehn, Peter W.

54

Droop Control for Islanded Microgrids Hemanshu R Pota  

E-Print Network [OSTI]

1 Droop Control for Islanded Microgrids Hemanshu R Pota School of Engineering & IT, UNSW microgrid. As the load within the microgrid changes, the inverter-sourced generators will share this change. For a microgrid modelled as a collection of ideal voltage sources only the controller and sensor dynamics interact

Pota, Himanshu Roy

55

Randomized Auction Design for Electricity Markets between Grids and Microgrids  

E-Print Network [OSTI]

Randomized Auction Design for Electricity Markets between Grids and Microgrids Linquan Zhang Dept power markets with grid-to-microgrid and microgrid-to-grid energy sales are studied, with an auction of algorithms General Terms Algorithms, Design, Economics Keywords Power Grid; Microgrids; Unit Commitment

Li, Zongpeng

56

The Advanced Microgrid: Integration and Interoperability (March 2014)  

Broader source: Energy.gov [DOE]

This white paper provides a synopsis of many elements of microgrid component technologies and system configurations that can subsequently be used for an “advanced microgrid” development activity. The paper offers a compilation of microgrid status, advanced microgrid goals and requirements, new challenges and opportunities, tools for designs, and tools to strengthen infrastructure and standards activities.

57

The Advanced Microgrid: Integration and Integration and Interoperability (March 2014)  

Broader source: Energy.gov [DOE]

This white paper provides a synopsis of many elements of microgrid component technologies and system configurations that can subsequently be used for an “advanced microgrid” development activity. The paper offers a compilation of microgrid status, advanced microgrid goals and requirements, new challenges and opportunities, tools for designs, and tools to strengthen infrastructure and standards activities.

58

Microgrid Dispatch for Macrogrid Peak-Demand Mitigation  

E-Print Network [OSTI]

distributed generation and storage technologies provide SRJ with microgrid functionality, allowing it to operate in island

DeForest, Nicholas

2013-01-01T23:59:59.000Z

59

Multiagent coordination in microgrids via wireless networks  

E-Print Network [OSTI]

The future smart grid is expected to be an integration of intelligent microgrids featured by localized electricity generation, storage, and consumption. Wireless communication is a promising means to facilitate pervasive microgrid monitoring and control at a high flexibility and low deployment cost

Hao Liang; Atef Abdrabou

60

Defining control strategies for microgrids islanded operation  

E-Print Network [OSTI]

Abstract—This paper describes and evaluates the feasibility of control strategies to be adopted for the operation of a microgrid when it becomes isolated. Normally, the microgrid operates in interconnected mode with the medium voltage network; however, scheduled or forced isolation can take place

J. A. Peças Lopes; Senior Member; C. L. Moreira; A. G. Madureira

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

1 Pricing Games among Interconnected Microgrids  

E-Print Network [OSTI]

Abstract—We consider a scenario with multiple independent microgrids close to each other in a region that are connected to each other and to the central grid (macrogrid). In each time slot, a given microgrid may produce more than, less than or as much power as it needs, and there is uncertainty on

Gaurav S. Kasbekar; Saswati Sarkar

62

Diploma Thesis Distributed Secondary Control in Microgrids  

E-Print Network [OSTI]

Diploma Thesis Distributed Secondary Control in Microgrids Hedi Bouattour May 10, 2013 Betreuer: Florian Dörfler University of California, Santa Barbara Center for Control, Dynamical Systems. Dr.-Ing. Frank Allgöwer #12;#12;Contents 1 Introduction 1 1.1 Microgrids and Control

Bullo, Francesco

63

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

SciTech Connect (OSTI)

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

Dr. Mohammad S. Alam

2006-03-15T23:59:59.000Z

64

Project Title: Microgrid Design Toolset  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Careerlumens_placard-green.epsEnergy1.pdfMarket |21,-CommitteeItemsHiTek logoCooperationMicrogrid

65

NREL: Technology Deployment - Microgrid Design  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the Contributions andData and Resources NRELIncorporatesTechnologies ConductedMicrogrid

66

A load shedding scheme for inverter based microgrids  

E-Print Network [OSTI]

Over the last decade, penetration of microgrids containing distributed generation (DG) sources has increased in grid distribution systems. This requires the stable operation of microgrids when connected to the distribution ...

Ojeda, Alejandro P

2011-01-01T23:59:59.000Z

67

Introduction to the model-free control of microgrids  

E-Print Network [OSTI]

This letter presents the application of the model-free control approach to the microgrid control. We show in simulation that the method allows to control, with a simple controller, voltage, current and power of inverter-based microgrids.

Michel, Loďc

2011-01-01T23:59:59.000Z

68

DOD/NREL Model Integrates Vehicles, Renewables & Microgrid (Fact Sheet)  

SciTech Connect (OSTI)

Fact sheet on microgrid model created by the Electric Vehicle Grid Integration program at the Fort Carson Army facility.

Not Available

2011-02-01T23:59:59.000Z

69

Analysis of electric vehicle interconnection with commercial building microgrids  

E-Print Network [OSTI]

energy costs, CO 2 emissions, or multiple objectives of providing services to a building microgrid produces technology neutral

Stadler, Michael

2011-01-01T23:59:59.000Z

70

Web-Based Economic and Environmental Optimization of Microgrids  

E-Print Network [OSTI]

Our Contribution to Microgrids Technology research TestingEconomic & environmental technology selection Economic &Lai Environmental Energy Technologies Division January 20,

Stadler, Michael

2014-01-01T23:59:59.000Z

71

Selective compensation of voltage harmonics in grid-connected microgrids  

E-Print Network [OSTI]

1 Selective compensation of voltage harmonics in grid-connected microgrids Mehdi Savaghebia , Juan is proposed for selective compensation of main voltage harmonics in a grid- connected microgrid. The aim level. Keywords Distributed Generator (DG); microgrid; grid-connected; voltage harmonics compensation. 1

Vasquez, Juan Carlos

72

Aalborg Universitet Hierarchical Control for Multiple DC Microgrids Clusters  

E-Print Network [OSTI]

Aalborg Universitet Hierarchical Control for Multiple DC Microgrids Clusters Shafiee, Qobad Control for Multiple DC Microgrids Clusters. I E E E Transactions on Energy Conversion. General rights, J. C. Vasquez, and J. M. Guerrero, "Hierarchical Control for Multiple DC-Microgrids Clusters," IEEE

Vasquez, Juan Carlos

73

TOWARDS REAL-TIME GENERATION SCHEDULING IN MICROGRIDS WITH  

E-Print Network [OSTI]

TOWARDS REAL-TIME GENERATION SCHEDULING IN MICROGRIDS WITH PERFORMANCE GUARANTEE LIAN LU, JINLONG TU, CHI-KIN CHAU, MINGHUA CHEN, ZHAO XU AND XIAOJUN LIN INTRODUCTION Microgrid is an emerging- generation improves generation efficiency by 2-3x. A key problem in microgrid operations is how to schedule

Zhang, Junshan

74

Modular Power Architectures for Microgrid Clusters Invited Paper  

E-Print Network [OSTI]

Modular Power Architectures for Microgrid Clusters ­ Invited Paper ­ Hengwei Lin1 , Chengxi Liu1 - Microgrids Research Programme, Aalborg University, 9220 Aalborg East, Denmark 2 Energinet.dk, Denmark Emails: {hwe,cli,joz,juq,tdr}@et.aau.dk www.microgrids.et.aau.dk Abstract-- One of the most important elements

Vasquez, Juan Carlos

75

Understanding the Role of Buildings in a Smart Microgrid  

E-Print Network [OSTI]

Understanding the Role of Buildings in a Smart Microgrid Yuvraj Agarwal Computer Science of a smart microgrid. In this paper, we examine the significant role that buildings play in energy use buildings can be enhanced and interfaced with the smart microgrid, and demonstrate the benefits

Gupta, Rajesh

76

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

E-Print Network [OSTI]

of Microgrids" Mohsen A. Jafari, Ph.D. Department of Industrial & Systems Engineering Rutgers University Friday on the optimal investment, planning, and control of distributed micro-grids. A micro-grid is characterized by its of microgrids quite challenging problems. From the power grid point of view, microgrids are resource nodes

Keaveny, Tony

77

DECENTRALIZED CONTROL ARCHITECTURE FOR COUPLING MICROGRIDS INTO DISTRIBUTION NETWORKS 1 Task 1: Coupling Low-Voltage Microgrids into  

E-Print Network [OSTI]

DECENTRALIZED CONTROL ARCHITECTURE FOR COUPLING MICROGRIDS INTO DISTRIBUTION NETWORKS 1 Task 1: Coupling Low-Voltage Microgrids into Mid-Voltage Distribution Systems Zhao Wang, Student Member, IEEE-voltage (LV) microgrids. At the same time, reactive power is dispatched coordinatively so that voltage

Lemmon, Michael

78

The CERTS microgrid and the future of the macrogrid  

SciTech Connect (OSTI)

The blackouts of summer 2003 underscored the dependence of western economies on reliable supply of electricity with tight tolerances of quality. While demand for electricity continues to grow, expansion of the traditional electricity supply system is constrained and is unlikely to keep pace with the growing thirst western economies have for electricity. Furthermore, no compelling case has been made that perpetual improvement in the overall power quality and reliability (PQR) delivered is possible or desirable. An alternative path to providing for sensitive loads is to provide for generation close to them. This would alleviate the pressure for endless improvement in grid PQR and might allow the establishment of a sounder economically based level of universal grid service. Providing for loads by means of local power generation is becoming increasingly competitive with central station generation for a number of reasons, four key ones being non-technical constraints on expansion of the grid, improvements in small scale technologies, opportunities for CHP application, and the ubiquitous nature of sensitive loads in advanced economies. Along with these new technologies, concepts for operating them partially under local control in microgrids are emerging, the CERTS Microgrid being one example. It has been demonstrated in simulation, and a laboratory test of a three microturbine system is planned for early 2005, to be followed by a field demonstration. A systemic energy analysis of a southern California naval base building demonstrates a current economic on-site power opportunity.

Marnay, Chris; Bailey, Owen C.

2004-06-01T23:59:59.000Z

79

A Framework for the Evaluation of the Cost and Benefits of Microgrids  

E-Print Network [OSTI]

Distributed Generation (DG) used in the Microgrid, the end-use Microgrid Customers (MGCs), the Distribution Network Operator (DNO), and possibly the generation utilities

Morris, Greg Young

2012-01-01T23:59:59.000Z

80

Microgrids  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector General Office0-72.pdfGeorgeDoesn't32 Master EM ProjectMemoDepartmentFY 2010Students

Note: This page contains sample records for the topic "modified microgrid concept" 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

Reliability of islanded microgrids with stochastic generation and prioritized load  

E-Print Network [OSTI]

The potential to improve distribution system reliability is a primary motivation behind the development and deployment of microgrids. Previous studies have illustrated substantial reliability benefits of dispatchable ...

Marden, Mirjana Milosevic

82

Distributed Generation Investment by a Microgrid Under Uncertainty  

E-Print Network [OSTI]

utility. Using the real options approach, we find naturalDistributed Generation; Real Options; Optimal Investment. 1.based microgrid via the real options approach to determine

Siddiqui, Afzal; Marnay, Chris

2006-01-01T23:59:59.000Z

83

Microgrid V2G Charging Station Interconnection Testing (Presentation)  

SciTech Connect (OSTI)

This presentation by Mike Simpson of the National Renewable Energy Laboratory (NREL) describes NREL's microgrid vehicle-to-grid charging station interconnection testing.

Simpson, M.

2013-07-01T23:59:59.000Z

84

Microgrids in the Evolving Electricity Generation and Delivery Infrastructure  

E-Print Network [OSTI]

1. application of combined heat and power (CHP) technology,of microgrids, combined heat and power, heterogeneous PQR,reciprocating engines, combined heat and power technologies,

Marnay, Chris; Venkataramanan, Giri

2006-01-01T23:59:59.000Z

85

Distributed Generation Investment by a Microgrid Under Uncertainty  

E-Print Network [OSTI]

DG) and combined heat and power (CHP) applications matchedpower generation with combined heat and power applications,tax on microgrid combined heat and power adoption, Journal

Siddiqui, Afzal; Marnay, Chris

2006-01-01T23:59:59.000Z

86

The Advanced Microgrid: Integration and Integration and Interoperabili...  

Office of Environmental Management (EM)

standards activities. It complements workshop reports and information provided by OE's Smart Grid R&D Program and other microgrid conference proceedings. With their...

87

International Microgrid Assessment: Governance, INcentives, and Experience (IMAGINE)  

E-Print Network [OSTI]

microgrids 3. Match technology with end-use requirements 4.Ministry of Science and Technology, and National EnergyNew Energy and Industrial Technology Organization), Nippon

Marnay, Chris

2014-01-01T23:59:59.000Z

88

Mitigation of Voltage and Current Harmonics in Grid-Connected Microgrids  

E-Print Network [OSTI]

Mitigation of Voltage and Current Harmonics in Grid-Connected Microgrids Mehdi Savaghebi1 , Josep M-connected microgrids. Two modes of compensation are considered, i.e. voltage and current compensation modes-electronic interface converter to the utility grid or microgrid. Microgrid is a local grid consisting of DGs, energy

Vasquez, Juan Carlos

89

Renewable Energy Microgrid Testbed at NASA Ames Research  

E-Print Network [OSTI]

Renewable Energy Microgrid Testbed at NASA Ames Research Center Joel Kubby, Dan O'Leary, Zachary #12;Goals · Set-up a unique microgrid test-bed for renewable energy generation, monitoring and storage · Use the facility for testing systems integration, optimization and control of new renewable energy

Lee, Herbie

90

Power Quality Improvement in Microgrid Using Advanced Active Power Conditioner  

E-Print Network [OSTI]

Abstract:- Wind energy conversion systems are now occupying important space in the research of renewable energy sources with microgrid. The main challenge in wind power generation is power quality problem and their connection with the distribution network in microgrid. The main factor behind poor

unknown authors

91

Distributed Generation Investment by a Microgrid under Uncertainty++++ Afzal Siddiqui  

E-Print Network [OSTI]

, CA 94720-8163, USA, c_marnay@lbl.gov ABSTRACT. This paper examines a California-based microgrid-term natural gas generation cost is stochastic, we initially assume that the microgrid may purchase electricity is not attractive. By allowing the electricity price to be stochastic, we next determine an investment threshold

Guillas, Serge

92

Continuously Optimized Reliable Energy (CORE) Microgrid: Models & Tools (Fact Sheet)  

SciTech Connect (OSTI)

This brochure describes Continuously Optimized Reliable Energy (CORE), a trademarked process NREL employs to produce conceptual microgrid designs. This systems-based process enables designs to be optimized for economic value, energy surety, and sustainability. Capabilities NREL offers in support of microgrid design are explained.

Not Available

2013-07-01T23:59:59.000Z

93

Power flow analysis for DC voltage droop controlled DC microgrids  

E-Print Network [OSTI]

loss, such as photovoltaic panels, batteries, fuel cells, LEDs, and electronic loads, DC microgrids sharing and secondary voltage regulation can now be analytically studied, and specialized optimization of the DC microgrid, in term of systematic analysis, protection coordination design, network optimization

Chaudhary, Sanjay

94

A Distributed Generation Control Architecture for Islanded AC Microgrids  

E-Print Network [OSTI]

1 A Distributed Generation Control Architecture for Islanded AC Microgrids Stanton T. Cady, Student Member, IEEE Abstract In this paper, we propose a distributed architecture for generation control in islanded ac microgrids with both synchronous generators and inverter-interfaced power supplies. Although

Dominguez-Garcia, Alejandro

95

SMART FUEL CELL OPERATED RESIDENTIAL MICRO-GRID COMMUNITY  

SciTech Connect (OSTI)

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

Dr. Mohammad S. Alam (PI/PD)

2005-04-13T23:59:59.000Z

96

Technical Report for "Hybrid Renewable Energy Investment in Microgrid"  

E-Print Network [OSTI]

side management, and decen- tralized operations of power grid in the form of microgrids [1]. It and demand in the microgrid to minimize the social operational cost. We design a decentralized algorithm observatory, we numerically demonstrate that the demand response saves 18% of the capital investment

Huang, Jianwei

97

Status of Overseas Microgrid Programs:Microgrid Research Activities in the U.S.  

SciTech Connect (OSTI)

Research on microgrids in the U.S. has taken a somewhat different path than parallel efforts in Japan and Europe, and this distinction is often noted in international research forums. In general, reliability and power quality in North America is poor compared to other developed countries. For example, in the U.S., the average annual expected outage duration is a few hours, whereas in Japan, it is only a few minutes. Power quality problems in the U.S. are both large scale, such as the August 2003 blackout, and local, such as damaging voltage sags. Meeting the increasingly demanding requirements of a modern digital economy would then seem to offer a more daunting challenge for the U.S. than elsewhere, and certainly, concern that the existing power delivery system will prove inadequate for future gourmet requirements has been a motivating driver of U.S. research. This objective tends to translate into a desire for microgrids to seamlessly island when grid power is interrupted or its quality is inadequate, and to (also seamlessly) reconnect when normal service has been restored. In a sense, the microgrid is perceived as acting as an uninterruptible power supply (UPS), and sometimes even as a competitor to existing UPS options. Nonetheless, this difference is often over-stated, and the other threads that motivate microgrid research also exist in the U.S., e.g. the desire to expand renewable generation and the need to increase the efficiency of fossil-fired generation by the useful local application of waste heat in combined heat and power (CHP) systems, Further, over time, the differences are blurring as concerns about climate change increasingly dominate objectives worldwide. This article describes the CERTS Microgrid, which is almost certainly the best known U.S. example, and also briefly mentions some other U.S. microgrid research.

Marnay, Chris; Marnay, Chris; Zhou, Nan

2008-02-01T23:59:59.000Z

98

Microgrids and Heterogeneous Power Quality and Reliability  

SciTech Connect (OSTI)

This paper describes two stylized alternative visions of how the power system might evolve to meet future requirements for the high quality electricity service that modern digital economies demand, a supergrids paradigm and a dispersed paradigm. Some of the economics of the dispersed vision are explored, and perspectives are presented on both the choice of homogeneous universal power quality upstream in the electricity supply chain and on the extremely heterogeneous requirements of end-use loads. It is argued that meeting the demanding requirements of sensitive loads by local provision of high quality power may be more cost effective than increasing the quality of universal homogeneous supply upstream in the legacy grid. Finally, the potential role of microgrids in delivering heterogeneous power quality is demonstrated by reference to two ongoing microgrid tests in the U.S. and Japan.

LaCommare, Kristina; Marnay, Chris

2007-10-01T23:59:59.000Z

99

Microsoft Word - microgrid_for_resilience .docx  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector General Office0-72.pdfGeorgeDoesn't32 MasterAcquisiti ---- ContraCITSSScalable Microgrids for

100

Sandia National Laboratories: Energy Surety Microgrid  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0EnergySandiaConsortiumActMicrogrid SPIDERS Completed Its Phase

Note: This page contains sample records for the topic "modified microgrid concept" 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

On-chip COMA Cache-coherence protocol for Microgrids of Microthreaded Cores  

E-Print Network [OSTI]

On-chip COMA Cache-coherence protocol for Microgrids of Microthreaded Cores Li Zhang Chris Jesshope and the development of a co-simulator to the Microgrid CMP emulator. 1 Introduction It is now widely accepted

Jesshope, Chris

102

Smart Microgrid Demonstrator Dr. Wei-Jen Lee (wlee@uta.edu) (Funded by DOE)  

E-Print Network [OSTI]

Smart Microgrid Demonstrator Dr. Wei-Jen Lee (wlee@uta.edu) (Funded by DOE) EE www.uta.edu//ee info reliability and efficiency, lower cost of electric power #12;Smart Microgrid Demonstrator Dr. Wei-Jen Lee

Texas at Arlington, University of

103

Modeling Microgrid Islanding Problems as DCOPs Saurabh Gupta, William Yeoh, Enrico Pontelli  

E-Print Network [OSTI]

, we formulate the microgrid islanding problem as distributed constraint optimization problem (DCOP. Index Terms--Microgrid, Islanding, Distributed Constraint Optimization. I. INTRODUCTION Every year residential and commercial facilities with controllable loads and distributed generation sources; loads

Yeoh, William

104

Adaptive load control of microgrids with non-dispatchable generation  

E-Print Network [OSTI]

Intelligent appliances have a great potential to provide energy storage and load shedding for power grids. Microgrids are simulated with high levels of wind energy penetration. Frequency-adaptive intelligent appliances are ...

Brokish, Kevin Martin

2009-01-01T23:59:59.000Z

105

CERTS Microgrid Laboratory Test Bed - PIER Final Project Report  

E-Print Network [OSTI]

of AEPSC. DTC Registered Procedure CERTS Microgrid Test PlanTarget Group: Assigned Procedure Review Date: 23 Feb. 2008document is to establish procedures for testing of the CERTS

Eto, Joseph H.

2008-01-01T23:59:59.000Z

106

Distributed Generation Investment by a Microgrid under Uncertainty  

E-Print Network [OSTI]

power generation with combined heat and power applications.tax on microgrid combined heat and power adoption. JournalCHP Application Center. Combined heat and power in a dairy.

Siddiqui, Afzal

2008-01-01T23:59:59.000Z

107

Secondary Control for Voltage Unbalance Compensation in an Islanded Microgrid  

E-Print Network [OSTI]

coupling (PCC). Unbalance compensation is achieved by proper control of distributed generators (DGs unbalance. Keywords-distributed generation; microgrid; secondary control; voltage unbalance compensation I. INTRODUCTION Distributed Generators (DGs) may be connected individually to the utility grid or be integrated

Vasquez, Juan Carlos

108

Distributed Generation Investment by a Microgrid under Uncertainty  

SciTech Connect (OSTI)

This paper examines a California-based microgrid?s decision to invest in a distributed generation (DG) unit fuelled by natural gas. While the long-term natural gas generation cost is stochastic, we initially assume that the microgrid may purchase electricity at a fixed retail rate from its utility. Using the real options approach, we find a natural gas generation cost threshold that triggers DG investment. Furthermore, the consideration of operational flexibility by the microgrid increases DG investment, while the option to disconnect from the utility is not attractive. By allowing the electricity price to be stochastic, we next determine an investment threshold boundary and find that high electricity price volatility relative to that of natural gas generation cost delays investment while simultaneously increasing the value of the investment. We conclude by using this result to find the implicit option value of the DG unit when two sources of uncertainty exist.

Marnay, Chris; Siddiqui, Afzal; Marnay, Chris

2008-08-11T23:59:59.000Z

109

Hardware simulation of diesel generator and microgrid stability  

E-Print Network [OSTI]

Over the last few years, people have begun to depend less on large power plants with extensive distribution systems, and more on local distributed generation sources. A microgrid, a local collection of distributed generators, ...

Zieve, Michael M

2012-01-01T23:59:59.000Z

110

Design and implementation of a microgrid-capable solar inverter  

E-Print Network [OSTI]

The notion of a practical microgrid -- a small, interconnected system of generators and loads that operates both synchronously with a larger, centralized grid and isolated from the grid, autonomously -- has grown popular ...

Darcey, Gavin M

2013-01-01T23:59:59.000Z

111

Analysis of electric vehicle interconnection with commercial building microgrids  

SciTech Connect (OSTI)

The outline of this presentation is: (1) global concept of microgrid and electric vehicle (EV) modeling; (2) Lawrence Berkeley National Laboratory's Distributed Energy Resources Customer Adoption Model (DER-CAM); (3) presentation summary - how does the number of EVs connected to the building change with different optimization goals (cost versus CO{sub 2}); (3) ongoing EV modeling for California: the California commercial end-use survey (CEUS) database, objective: 138 different typical building - EV connections and benefits; (4) detailed analysis for healthcare facility: optimal EV connection at a healthcare facility in southern California; and (5) conclusions. Conclusions are: (1) EV Charging/discharging pattern mainly depends on the objective of the building (cost versus CO{sub 2}); (2) performed optimization runs show that stationary batteries are more attractive than mobile storage when putting more focus on CO{sub 2} emissions. Why? Stationary storage is available 24 hours a day for energy management - more effective; (3) stationary storage will be charged by PV, mobile only marginally; (4) results will depend on the considered region and tariff - final work will show the results for 138 different buildings in nine different climate zones and three major utility service territories.

Stadler, Michael; Mendes, Goncalo; Marnay, Chris; M& #233; gel, Olivier; Lai, Judy

2011-04-01T23:59:59.000Z

112

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

E-Print Network [OSTI]

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

Tolbert, Leon M.

113

Modeling and Simulation of a Microgrid as a Stochastic Hybrid System  

E-Print Network [OSTI]

1 Modeling and Simulation of a Microgrid as a Stochastic Hybrid System Martin Strelec, Karel Macek, Alessandro Abate Abstract--Microgrids (MGs) are small-scale local energy grids. While dedicated to cover and on approximate dynamic programming) for typical challenges in MGs. Index Terms--Microgrids, Stochastic Hybrid

Abate, Alessandro

114

Control of Parallel-Connected Bidirectional AC-DC Converters in Stationary Frame for Microgrid  

E-Print Network [OSTI]

Control of Parallel-Connected Bidirectional AC-DC Converters in Stationary Frame for Microgrid-- With the penetration of renewable energy in modern power system, microgrid has become a popular application worldwide. In this paper, parallel-connected bidirectional converters for AC and DC hybrid microgrid application

Teodorescu, Remus

115

Model Order Reductions for Stability Analysis of Islanded Microgrids with Droop Control  

E-Print Network [OSTI]

1 Model Order Reductions for Stability Analysis of Islanded Microgrids with Droop Control V, IEEE Abstract--Three-phase inverters subject to droop control are widely used in islanded microgrids. In this paper, a mathematical model for islanded microgrids with linear loads and inverters under frequency

Vasquez, Juan Carlos

116

Optimal power flow in microgrids using event-triggered optimization Pu Wan and Michael D. Lemmon  

E-Print Network [OSTI]

Optimal power flow in microgrids using event-triggered optimization Pu Wan and Michael D. Lemmon Abstract-- Microgrids are power generation and distribution systems in which users and generators-triggered distributed optimization algorithm to solve the optimal power flow (OPF) problem in microgrids. Under event

Lemmon, Michael

117

Secondary Voltage Unbalance Compensation for Three-Phase Four-Wire Islanded Microgrids  

E-Print Network [OSTI]

as a cluster of distributed resources (DRs), i.e. distributed generation (DG), distributed storage (DSSecondary Voltage Unbalance Compensation for Three-Phase Four-Wire Islanded Microgrids Fen Tang four-wire islanded microgrid systems. It is implemented in the secondary control level of the microgrid

Vasquez, Juan Carlos

118

International Journal of Innovations in Engineering and Technology (IJIET) Optimal Rural Microgrid Energy Management Using  

E-Print Network [OSTI]

Abstract-The microgrid concept is a natural evolution of distributed resources that may be used to serve energy to customers in areas where conventional power system approaches cannot satisfy the reliability needs. Microgrids[2] may also provide support to conventional power systems that are too constrained to meet the power demands of customers. This paper presents a case study of a remote village dependent on agriculture, with no grid extension. The remote village consists of 400 people and 200 cattle including poultries, bovines, swine etc. The latitude and longitude of the study area are 30 ° 32 ’ N and 76 ° 39 ’ E respectively. The proposed model consists of Photovoltaic (PV) array, wind energy subsystem, micro hydro, biogas fueled generator and battery storage sub-system. The final goal is to maximize energy output from distributed energy resources (DERs) by Optimization using HOMER. Performance of each component of the model will be evaluated and finally sensitivity analysis will be performed to optimize the system at different conditions.

unknown authors

119

Distributed Generation Investment by a Microgrid UnderUncertainty  

SciTech Connect (OSTI)

This paper examines a California-based microgrid s decision to invest in a distributed generation (DG) unit that operates on natural gas. While the long-term natural gas generation cost is stochastic, we initially assume that the microgrid may purchase electricity at a fixed retail rate from its utility. Using the real options approach, we find natural gas generating cost thresholds that trigger DG investment. Furthermore, the consideration of operational flexibility by the microgrid accelerates DG investment, while the option to disconnect entirely from the utility is not attractive. By allowing the electricity price to be stochastic, we next determine an investment threshold boundary and find that high electricity price volatility relative to that of natural gas generating cost delays investment while simultaneously increasing the value of the investment. We conclude by using this result to find the implicit option value of the DG unit.

Siddiqui, Afzal; Marnay, Chris

2006-06-16T23:59:59.000Z

120

Microgrids and Heterogeneous Security, Quality, Reliability, andAvailability  

SciTech Connect (OSTI)

This paper describes two stylized alternative visions inpopular currencyof how the power system might evolve to meet futurerequirements for the high quality electricity service that modern digitaleconomies demand, a supergrids paradigm and a dispersed paradigm. Some ofthe economics of the dispersed vision are explored. Economic perspectivesare presented on both the choice of homogeneous universal power qualityupstream in the electricity supply, and also on the extremelyheterogeneous require-ments of end-use loads. Finally, the potential roleof microgrids in delivering heterogeneous power quality is demonstratedby reference to two ongoing microgrid tests in the U.S. andJapan.

Marnay, Chris

2007-01-31T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Understanding the Role of Buildings in a Smart Microgrid  

E-Print Network [OSTI]

Abstract—A ‘smart microgrid ’ refers to a distribution network for electrical energy, starting from electricity generation to its transmission and storage with the ability to respond to dynamic changes in energy supply through co-generation and demand adjustments. At the scale of a small town, a

Yuvraj Agarwal; Thomas Weng; Rajesh K. Gupta

122

Microgrids, virtual power plants and our distributed energy future  

SciTech Connect (OSTI)

Opportunities for VPPs and microgrids will only increase dramatically with time, as the traditional system of building larger and larger centralized and polluting power plants by utilities charging a regulated rate of return fades. The key questions are: how soon will these new business models thrive - and who will be in the driver's seat? (author)

Asmus, Peter

2010-12-15T23:59:59.000Z

123

Recommendations for Technologies for Microgrids on the Big Island  

E-Print Network [OSTI]

and Energy Storage Studies 1 2.2 HNEI Sustainable Energy Study 3 3.0 Changes in Big Island Loads), and Hawaiian Electric Company (HECO) looked at the potential benefits of microgrids and energy storage of Energy Office of Electricity Delivery and Energy Reliability Under Award No. DE-FC-06NT42847 Subtask 2

124

Hierarchical Control and Management of Virtual Microgrids for Vehicle Electrification  

E-Print Network [OSTI]

of electrical power generation and delivery. A Smart Grid is an intelligent and automated energy grid and new types of loads such as plug-in (hybrid) electric vehicles (PEVs); (2) optimizing systemHierarchical Control and Management of Virtual Microgrids for Vehicle Electrification Feng Lina

Zhang, Hongwei

125

Breaking the Hierarchy: Distributed Control & Economic Optimality in Microgrids  

E-Print Network [OSTI]

Breaking the Hierarchy: Distributed Control & Economic Optimality in Microgrids Florian D¨orfler. A preliminary version of part of the results in this document has been presented in [1]. F. D¨orfler is with the Department of Electrical Engineering, Uni- versity of California Los Angeles. Email: dorfler@seas.ucla.edu. J

Bullo, Francesco

126

Electric Grid State Estimators for Distribution Systems with Microgrids  

E-Print Network [OSTI]

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

Gupta, Vijay

127

Sharing Renewable Energy in Smart Microgrids , Zhichuan Huang  

E-Print Network [OSTI]

Sharing Renewable Energy in Smart Microgrids Ting Zhu , Zhichuan Huang , Ankur Sharma , Jikui Su § Department of Computer Science, University of Massachusetts Amherst ABSTRACT Renewable energy harvested from the environment is an at- tractive option for providing green energy to homes. Unfor- tunately, the intermittent

Shenoy, Prashant

128

Hybrid Renewable Energy Investment in Microgrid Hao Wang, Jianwei Huang  

E-Print Network [OSTI]

between the utility company and consumers for a better demand side management, and decen- tralized. In the second period, the operator coordinates the power supply and demand in the microgrid to minimize that the demand response saves 18% of the capital investment, and hybrid renewable energy investment reduces

Huang, Jianwei

129

The Added Economic and Environmental Value of Solar Thermal Systems in Microgrids with Combined Heat and Power  

E-Print Network [OSTI]

with or without combined heat and power (CHP) and contributein Microgrids with Combined Heat and Power Chris Marnay,Microgrids with Combined Heat and Power 1 Chris Marnay a) ,

Marnay, Chris

2010-01-01T23:59:59.000Z

130

New modeling and control solutions for integrated microgrid system with respect to thermodynamics properties of generation and demand  

E-Print Network [OSTI]

This thesis investigates microgrid control stability with respect to thermodynamics behaviors of generation and demand. First, a new integrated microgrid model is introduced. This model consists of a combined cycle power ...

Liu, Fang-Yu, S.M. Massachusetts Institute of Technology

2014-01-01T23:59:59.000Z

131

Wireless Communication for Controlling Microgrids: Co-simulation and Performance Evaluation  

SciTech Connect (OSTI)

A microgrid with wireless communication links for microgrid control has been designed and developed. The complete simulation model has been developed in MatLab SimuLink with seamless integration of the power subsystem and the communication subsystem. Unlike the conventional co-simulators that usually glue two existing simulators together by creating an interface, which has a steep learning curve, the proposed simulator is a compact single-unit model. Detailed modeling of the power subsystem and communication system is presented as well as the microgrid control architecture and strategies. The impact of different communication system performances on microgrid control has been studied and evaluated in the proposed simulator.

Mao, Rukun [ORNL] [ORNL; Xu, Yan [ORNL] [ORNL; Li, Huijuan [ORNL] [ORNL; Li, Husheng [ORNL] [ORNL

2013-01-01T23:59:59.000Z

132

Novel Approach for Calculation and Analysis of Eigenvalues and Eigenvectors in Microgrids: Preprint  

SciTech Connect (OSTI)

This paper proposes a novel approach based on matrix perturbation theory to calculate and analyze eigenvalues and eigenvectors in a microgrid system. Rigorous theoretical analysis to solve eigenvalues and the corresponding eigenvectors for a system under various perturbations caused by fluctuations of irradiance, wind speed, or loads is presented. A computational flowchart is proposed for the unified solution of eigenvalues and eigenvectors in microgrids, and the effectiveness of the matrix perturbation-based approach in microgrids is verified by numerical examples on a typical low-voltage microgrid network.

Li, Y.; Gao, W.; Muljadi, E.; Jiang, J.

2014-02-01T23:59:59.000Z

133

A Framework for the Evaluation of the Cost and Benefits of Microgrids  

E-Print Network [OSTI]

networks," Electric Power Systems Research, vol. 79, no. 2,Microgrids," Electric Power Systems Research, vol. 80, no.resources," Electric Power Systems Research, vol. 77, no. 7,

Morris, Greg Young

2012-01-01T23:59:59.000Z

134

Panel: Microgrid Research and Field Testing IEEE PES General Meeting, 24-28 June 2007, Tampa, FL 1 In general, a microgrid can operate in both the grid-connected  

E-Print Network [OSTI]

Panel: Microgrid Research and Field Testing IEEE PES General Meeting, 24-28 June 2007, Tampa, FL 1 Abstract In general, a microgrid can operate in both the grid-connected mode and the islanded mode where the microgrid is interfaced to the main power system by a fast semiconductor switch called static switch, (SS

135

Intentional Islanded Operation of Converter Fed Microgrids Charles K. Sao, Student Member, IEEE, and Peter W. Lehn, Member, IEEE  

E-Print Network [OSTI]

1 Intentional Islanded Operation of Converter Fed Microgrids Charles K. Sao, Student Member, IEEE microgrid and proposes a control scheme to regulate its voltage and frequency. The model, which is formulated in an instantaneously synchro- nized reference frame, shows that the microgrid voltage depends

Lehn, Peter W.

136

IEEE TRANSACTIONS ON SMART GRID, VOL. 5, NO. 4, JULY 2014 1621 Realizing Unified Microgrid Voltage Profile and  

E-Print Network [OSTI]

IEEE TRANSACTIONS ON SMART GRID, VOL. 5, NO. 4, JULY 2014 1621 Realizing Unified Microgrid Voltage the information received locally from the neighboring nodes in the microgrid, and the critical nodes without DG the microgrid to have a unified voltage profile, and incorporating the subgradient method facilitates its

Qu, Zhihua

137

GridMat: Matlab Toolbox for GridLAB-D to Analyse Grid Impact and Validate Residential Microgrid Level  

E-Print Network [OSTI]

GridMat: Matlab Toolbox for GridLAB-D to Analyse Grid Impact and Validate Residential Microgrid.alfaruque, fahourai} @ uci.edu Abstract-- Residential microgrid has the capability to participate in the distribution level) advanced control algorithms need to be developed and validated for such residential microgrids

Al Faruque, Mohammad Abdullah

138

Abstract--Increasing concerns about energy security and reliability are intensifying the interest in microgrid and vehicle-  

E-Print Network [OSTI]

of the distributed energy storage capacity provided by the vehicle-to- grid (V2G) technology. Microgrids were, can be involved in electric power generation in microgrids. The intermittent characteristics- mail: hiskens@umich.edu). islanding of the microgrid, may cause stability issues, and hence effective

Hiskens, Ian A.

139

IEEE TRANSACTIONS ON SUSTAINABLE ENERGY 1 Risk-Constrained Microgrid Reconfiguration  

E-Print Network [OSTI]

-scale controllable power sources such as diesel generators and micro combined heat and power (microCHP) units reconfiguration task is considered for existing power distribution systems and microgrids, in the pres- ence power distribution systems and future microgrids, and one of the driving forces toward transforming

Giannakis, Georgios

140

A Survey of Techniques Used to Control Microgrid Generation and Storage during Island Operation  

E-Print Network [OSTI]

A microgrid is a cluster of interconnected distributed generators, loads and intermediate storage units that cooperate with each other to be collectively treated by the grid as a controllable load or generator. Power quality events and pre-set conditions will make the microgrid disconnect from the

Michael Angelo Pedrasa

Note: This page contains sample records for the topic "modified microgrid concept" 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

Validating and scaling the microgrid: A scientific instrument for grid dynamics  

E-Print Network [OSTI]

depends on coordinated and accurate modeling of all four of these elements simultaneously. We have designed and implemented a tool called the MicroGrid which enables accurate and comprehensive study of the dynamic interaction of applications, middleware, resource, and networks. The MicroGrid creates a

Xin Liu; Huaxia Xia; Andrew A. Chien

142

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

E-Print Network [OSTI]

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

Prasanna, Viktor K.

143

Supervisory Control of an Adaptive-Droop Regulated DC Microgrid with Battery Management  

E-Print Network [OSTI]

such as photovoltaic (PV) systems and secondary batteries. In this paper, several distributed generators (DGs) have1 Supervisory Control of an Adaptive-Droop Regulated DC Microgrid with Battery Management been merged together with a pair of batteries and loads to form an autonomous dc Microgrid (MG

Vasquez, Juan Carlos

144

Demo Abstract: Toward Data-driven Demand-Response Optimization in a Campus Microgrid  

E-Print Network [OSTI]

Demo Abstract: Toward Data-driven Demand-Response Optimization in a Campus Microgrid Yogesh Simmhan-driven demand response optimization (DR) in the USC campus microgrid, as part of the Los An- geles Smart Grid of this project is to investigate techniques for demand-response optimization (DR) ­ cur- tailing the electricity

Prasanna, Viktor K.

145

Robust Networked Control Scheme for Distributed Secondary Control of Islanded MicroGrids  

E-Print Network [OSTI]

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

Vasquez, Juan Carlos

146

A Secure Energy Routing Mechanism for Sharing Renewable Energy in Smart Microgrid  

E-Print Network [OSTI]

A Secure Energy Routing Mechanism for Sharing Renewable Energy in Smart Microgrid Ting Zhu Sheng, Binghamton, NY, USA Abstract--Due to volatile and rising energy prices, smart microgrids appear and wind turbines on every house sharing renewable energy among houses. How to efficiently and optimally

Massachusetts at Amherst, University of

147

DECENTRALIZED VOLTAGE CONTROL TO MINIMIZE DISTRIBUTION LOSSES IN AN ISLANDED MICROGRID  

E-Print Network [OSTI]

power sources and energy storage systems such as batteries requires new power and voltage control-time voltage control algorithm that minimizes power losses for a microgrid supported by inverter based Microgrids can bring electricity power to rural communities or isolated military forward operation bases

Peng, Huei

148

Complementary Effect of Wind and Solar Energy Sources in a Microgrid  

E-Print Network [OSTI]

Complementary Effect of Wind and Solar Energy Sources in a Microgrid M. A. Barik, Student Member. Index Terms--Microgrid, renewable energy sources, reactive power mismatch, solar integration, voltage-mass energy, etc. Of them wind and solar energy is broadly used for their characteristics. This paper presents

Pota, Himanshu Roy

149

Demand Side Management for Wind Power Integration in Microgrid Using Dynamic Potential Game Theory  

E-Print Network [OSTI]

Demand Side Management for Wind Power Integration in Microgrid Using Dynamic Potential Game Theory, Wind Power Integration, Markov Chain, Dynamic Potential Game Theory, Nash Equilibrium. I. INTRODUCTION the intermittency in wind power generation. Our focus is on an isolated microgrid with one wind turbine, one fast

Huang, Jianwei

150

Micro-Grids for Colonias (TX)  

SciTech Connect (OSTI)

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

Dean Schneider; Michael Martin; Renee Berry; Charles Moyer

2012-07-31T23:59:59.000Z

151

Microgrid Reliability Modeling and Battery Scheduling Using Stochastic Linear Programming  

SciTech Connect (OSTI)

This paper describes the introduction of stochastic linear programming into Operations DER-CAM, a tool used to obtain optimal operating schedules for a given microgrid under local economic and environmental conditions. This application follows previous work on optimal scheduling of a lithium-iron-phosphate battery given the output uncertainty of a 1 MW molten carbonate fuel cell. Both are in the Santa Rita Jail microgrid, located in Dublin, California. This fuel cell has proven unreliable, partially justifying the consideration of storage options. Several stochastic DER-CAM runs are executed to compare different scenarios to values obtained by a deterministic approach. Results indicate that using a stochastic approach provides a conservative yet more lucrative battery schedule. Lower expected energy bills result, given fuel cell outages, in potential savings exceeding 6percent.

Cardoso, Goncalo; Stadler, Michael; Siddiqui, Afzal; Marnay, Chris; DeForest, Nicholas; Barbosa-Povoa, Ana; Ferrao, Paulo

2013-05-23T23:59:59.000Z

152

Distributed control for optimal reactive power compensation in smart microgrids  

E-Print Network [OSTI]

We consider the problem of optimal reactive power compensation for the minimization of power distribution losses in a smart microgrid. We first propose an approximate model for the power distribution network, which allows us to cast the problem into the class of convex quadratic, linearly constrained, optimization problems. We also show how this model provides the tools for a distributed approach, in which agents have a partial knowledge of the problem parameters and state, and can only perform local measurements. Then, we design a randomized, gossip-like optimization algorithm, providing conditions for convergence together with an analytic characterization of the convergence speed. The analysis shows that the best performance can be achieved when we command cooperation among agents that are neighbors in the smart microgrid topology. Numerical simulations are included to validate the proposed model and to confirm the analytic results about the performance of the proposed algorithm.

Bolognani, Saverio

2011-01-01T23:59:59.000Z

153

Microgrids in the Evolving Electricity Generation and DeliveryInfrastructure  

SciTech Connect (OSTI)

The legacy paradigm for electricity service in most of the electrified world today is based on the centralized generation-transmission-distribution infrastructure that evolved under a regulated environment. More recently, a quest for effective economic investments, responsive markets, and sensitivity to the availability of resources, has led to various degrees of deregulation and unbundling of services. In this context, a new paradigm is emerging wherein electricity generation is intimately embedded with the load in microgrids. Development and decay of the familiar macrogrid is discussed. Three salient features of microgrids are examined to suggest that cohabitation of micro and macro grids is desirable, and that overall energy efficiency can be increased, while power is delivered to loads at appropriate levels of quality.

Marnay, Chris; Venkataramanan, Giri

2006-02-01T23:59:59.000Z

154

A Green Prison: The Santa Rita Jail Campus Microgrid  

SciTech Connect (OSTI)

A large microgrid project is nearing completion at Alameda County’s twenty-two-year-old 45 ha 4,000-inmate Santa Rita Jail, about 70 km east of San Francisco. Often described as a green prison, it has a considerable installed base of distributed energy resources (DER) including an eight-year old 1.2 MW PV array, a five-year old 1 MW fuel cell with heat recovery, and considerable efficiency investments. A current US$14 M expansion adds a 2 MW-4 MWh Li-ion battery, a static disconnect switch, and various controls upgrades. During grid blackouts, or when conditions favor it, the Jail can now disconnect from the grid and operate as an island, using the on-site resources described together with its back-up diesel generators. In other words, the Santa Rita Jail is a true microgrid, or ?grid, because it fills both requirements, i.e. it is a locally controlled system, and it can operate both grid connected and islanded. The battery’s electronics includes Consortium for Electric Reliability Technology (CERTS) Microgrid technology. This enables the battery to maintain energy balance using droops without need for a fast control system.

Marnay, Chris; DeForest, Nicholas; Lai, Judy

2012-01-22T23:59:59.000Z

155

Abstract--The distribution system provides major opportunities for smart grid concepts. One way to approach  

E-Print Network [OSTI]

1 Abstract-- The distribution system provides major opportunities for smart grid concepts. One way efficiencies through the use of waste heat. Managing significant levels of DER with a wide and dynamic set clustered generation and associated loads as a grid resource or a "microgrid". The clustered sources

156

Development of a High-Speed Static Switch for Distributed Energy and Microgrid Applications  

SciTech Connect (OSTI)

Distributed energy resources can provide power to local loads in the electric distribution system and benefits such as improved reliability. Microgrids are intentional islands formed at a facility or in an electrical distribution system that contains at least one distributed resource and associated loads. Microgrids that operate both electrical generation and loads in a coordinated manner can offer additional benefits to the customer and local utility. The loads and energy sources can be disconnected from and reconnected to the area or local utility with minimal disruption to the local loads, thereby improving reliability. This paper details the development and testing of a highspeed static switch for distributed energy and microgrid applications.

Kroposki, B.; Pink, C.; Lynch, J.; John, V.; Meor Daniel, S.; Benedict, E.; Vihinen, I.

2007-01-01T23:59:59.000Z

157

Microgrid Workshop Report August 2011 | Department of Energy  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector General Office0-72.pdfGeorgeDoesn't32 Master EM ProjectMemoDepartmentFY 2010Students andMicrogrid

158

PSCAD/EMTDC-Based Modeling and Analysis of a Microgrid with Renewable Energy Sources  

E-Print Network [OSTI]

. The proposed microgrid system includes fundamental power system component models, two renewable energy source models (wind and solar) and one energy storage source model. Different case studies were conducted. The results from the simulation case studies...

Chu, Zhengguo

2010-07-14T23:59:59.000Z

159

A Framework for the Evaluation of the Cost and Benefits of Microgrids  

E-Print Network [OSTI]

tax on microgrid combined heat and power adoption," Journalas well as power (Combined Heat and Power–CHP) [4]. It hasand by providing Combined Heat and Power (CHP) [9],[16].

Morris, Greg Young

2012-01-01T23:59:59.000Z

160

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

E-Print Network [OSTI]

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

Zeineldin, H. H.

Note: This page contains sample records for the topic "modified microgrid concept" 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

Pricing Games among Interconnected Microgrids Gaurav S. Kasbekar and Saswati Sarkar  

E-Print Network [OSTI]

1 Pricing Games among Interconnected Microgrids Gaurav S. Kasbekar and Saswati Sarkar Abstract than, less than or as much aggregate power as it requires. G. Kasbekar and S. Sarkar

Sarkar, Saswati

162

The Added Economic and Environmental Value of Solar Thermal Systems in Microgrids with Combined Heat and Power  

E-Print Network [OSTI]

Environmental Value of Solar Thermal Systems in MicrogridsEnvironmental Value of Solar Thermal Systems in Microgridsa) ABSTRACT The addition of solar thermal and heat storage

Marnay, Chris

2010-01-01T23:59:59.000Z

163

Hardware Development of a Laboratory-Scale Microgrid Phase 2: Operation and Control of a Two-Inverter Microgrid  

SciTech Connect (OSTI)

This report summarizes the activities of the second year of a three-year project to develop control software for microsource distributed generation systems. In this phase, a laboratory-scale microgrid was expanded to include: (1) Two emulated distributed resources; (2) Static switchgear to allow rapid disconnection and reconnection; (3) Electronic synchronizing circuitry to enable transient-free grid interconnection; (4) Control software for dynamically varying the frequency and voltage controller structures; and (5) Power measurement instrumentation for capturing transient waveforms at the interconnect during switching events.

Illindala, M. S.; Piagi, P.; Zhang, H.; Venkataramanan, G.; Lasseter, R. H.

2004-03-01T23:59:59.000Z

164

Integration& Operation of a Microgrid at Santa Rita Jail  

SciTech Connect (OSTI)

Santa Rita Jail is a 4,500 inmate facility located in Dublin CA, approximately 40 miles (65 km) east of San Francisco. Over the past decade, a series of Distributed Energy Resources (DER) installations and efficiency measures have been undertaken to transform the 3MW facility into a"Green Jail". These include a 1.2MW rated rooftop PV system installed in 2002, a 1MW molten carbonate fuel cell with CHP, and retrofits to lighting and HVAC systems to reduce peak loads. With the upcoming installation of a large-scale battery and fast static disconnect switch, Santa Rita Jail will become a true microgrid, with full CERTS Microgrid functionality. Consequently, the jail will be able to seamlessly disconnect from the grid and operate as an island in the event of a disturbance, reconnecting again once the disturbance has dissipated. The extent to which that jail is capable of islanding is principally dependant on the energy capacity of the battery-one focus of this investigation. Also presented here are overviews of the DER currently installed at the jail, as well as the value it provides by offsetting the purchase of electricity under the current Pacific Gas& Electric (PG&E) tariff.

Chevron Energy Solutions; Alameda County; DeForest, Nicholas; Lai, Judy; Stadler, Michael; Mendes, Goncalo; Marnay, Chris; Donadee, Jon

2011-05-01T23:59:59.000Z

165

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

E-Print Network [OSTI]

. With the growing deployment of DER units, especially small-scale Combined Heat and Power (CHP) plants and Renewable Energy Sources (RES) based Distributed Generation (DG) units, distribution systems can no longer in US, Hydro-Quebec microgrid in Canada, NEDO microgrid in Japan, and EU Microgrid in Europe, have shown

Chen, Zhe

166

Design and Performance of Solar Decathlon 2011 High-Penetration Microgrid: Preprint  

SciTech Connect (OSTI)

The U.S. Department of Energy Solar Decathlon challenges collegiate teams to design, build, and operate solar-powered houses that are cost-effective, energy-efficient, and attractive. The Solar Decathlon 2011 was held in Washington, D.C., from September 23 to October 2, 2011 . A high-penetration microgrid was designed, installed, and operated for the Solar Decathlon 2011 to grid-connect 19 highly energy-efficient, solar-powered competition houses to a single utility connection point. The capacity penetration of this microgrid (defined as maximum PV generation divided by maximum system load over a two-week period) was 74% based on 1-minute averaged data. Temporary, ground-laid conductors and electrical distribution equipment were installed to grid-connect the Solar Decathlon village, which included the houses as well as other electrical loads used by the event organizers. While 16 of the houses were connected to the 60 Hz microgrid, three houses from Belgium, China, and New Zealand were supplied with 50 Hz power. The design of the microgrid, including the connection of the houses powered by 50 Hz and a standby diesel generator, is discussed in this paper. In addition to the utility-supplied net energy meters at each house, a microgrid monitoring system was installed to measure and record energy consumption and PV energy production at 1-second intervals at each house. Bidirectional electronic voltage regulators were installed for groups of competition houses, which held the service voltage at each house to acceptable levels. The design and successful performance of this high-penetration microgrid is presented from the house, microgrid operator, and utility perspectives.

Stafford, B.; Coddington, M.; Butt, R.; Solomon, S.; Wiegand, G.; Wagner, C.; Gonzalez, B.

2012-04-01T23:59:59.000Z

167

New Power Electronics Converter Interfacing a Hybrid Dc/Ac Microgrid M. Alibeik, E. C. dos Santos Jr.  

E-Print Network [OSTI]

New Power Electronics Converter Interfacing a Hybrid Dc/Ac Microgrid M. Alibeik, E. C. dos Santos microgrid is that it has higher efficiency and lesser power conversion. In this work is proposed a new integrated power electronics converter able to connect a Distributed Generation (DG) unit with a hybrid dc

Zhou, Yaoqi

168

Topology Detection in Microgrids with Micro-Synchrophasors  

E-Print Network [OSTI]

Network topology in distribution networks is often unknown, because most switches are not equipped with measurement devices and communication links. However, knowledge about the actual topology is critical for safe and reliable grid operation. This paper proposes a voting-based topology detection method based on micro-synchrophasor measurements. The minimal difference between measured and calculated voltage angle or voltage magnitude, respectively, indicates the actual topology. Micro-synchrophasors or micro-Phasor Measurement Units ({\\mu}PMU) are high-precision devices that can measure voltage angle differences on the order of ten millidegrees. This accuracy is important for distribution networks due to the smaller angle differences as compared to transmission networks. For this paper, a microgrid test bed is implemented in MATLAB with simulated measurements from {\\mu}PMUs as well as SCADA measurement devices. The results show that topologies can be detected with high accuracy. Additionally, topology detecti...

Arghandeh, Reza; von Meier, Alexandra; Cavraro, Guido; Ruh, Monika; Andersson, Göran

2015-01-01T23:59:59.000Z

169

Microgrid Design, Development and Demonstration - Final Report for Phase I and Phase II  

SciTech Connect (OSTI)

This document constitutes GE’s final report for the Microgrid Design, Development and Demonstration program for DOE’s Office of Electricity Delivery and Energy Reliability, Award DE-FC02-05CH11349. It contains the final report for Phase I in Appendix I, and the results the work performed in Phase II. The program goal was to develop and demonstrate a Microgrid Energy Management (MEM) framework for a broad set of Microgrid applications that provides unified controls, protection, and energy management. This project contributed to the achievement of the U.S. Department of Energy’s Renewable and Distributed Systems Integration Program goals by developing a fully automated power delivery microgrid network that: - Reduces carbon emissions and emissions of other air pollutants through increased use of optimally dispatched renewable energy, - Increases asset use through integration of distributed systems, - Enhances reliability, security, and resiliency from microgrid applications in critical infrastructure protection, constrained areas of the electric grid, etc. - Improves system efficiency with on-site, distributed generation and improved economic efficiency through demand-side management.

Sumit Bose; Michael Krok

2011-02-08T23:59:59.000Z

170

Design of Micro-grid System Based on Renewable Power Generation Units  

E-Print Network [OSTI]

Abstract- Micro-grid system is currently a conceptual solution to fulfill the commitment of reliable power delivery for future power systems. Renewable power sources such as wind and hydro offer the best potential for emission free power for future micro-grid systems. This paper presents a micro-grid system based on wind and hydro power sources and addresses issues related to operation, control, and stability of the system. The micro-grid system investigated in this paper represents a case study in Newfoundland, Canada. It consists of a small hydro generation unit and a wind farm that contains nine variable- speed, double-fed induction generator based wind turbines. Using Matlab/Simulink, the system is modeled and simulated to identify the technical issues involved in the operation of a micro-grid system based on renewable power generation units. The operational modes, technical challenges and a brief outline of conceptual approaches to addressing some of the technical issues are presented for further investigation.

Dr. K. Ravich; M. Manasa; Mr. P. Yohan Babu; G. V. P. Anjaneyulu

171

Microgrids: An emerging paradigm for meeting building electricityand heat requirements efficiently and with appropriate energyquality  

SciTech Connect (OSTI)

The first major paradigm shift in electricity generation,delivery, and control is emerging in the developed world, notably Europe,North America, and Japan. This shift will move electricity supply awayfrom the highly centralised universal service quality model with which weare familiar today towards a more dispersed system with heterogeneousqualities of service. One element of dispersed control is the clusteringof sources and sinks into semi-autonomous mu grids (microgrids).Research, development, demonstration, and deployment (RD3) of mu gridsare advancing rapidly on at least three continents, and significantdemonstrations are currently in progress. This paradigm shift will resultin more electricity generation close to end-uses, often involvingcombined heat and power application for building heating and cooling,increased local integration of renewables, and the possible provision ofheterogeneous qualities of electrical service to match the requirementsof various end-uses. In Europe, mu grid RD3 is entering its third majorround under the 7th European Commission Framework Programme; in the U.S.,one specific mu grid concept is undergoing rigorous laboratory testing,and in Japan, where the most activity exists, four major publiclysponsored and two privately sponsored demonstrations are in progress.This evolution poses new challenges to the way buildings are designed,built, and operated. Traditional building energy supply systems willbecome much more complex in at least three ways: 1. one cannot simplyassume gas arrives at the gas meter, electricity at its meter, and thetwo systems are virtually independent of one another; rather, energyconversion, heat recovery and use, and renewable energy harvesting mayall be taking place simultaneously within the building energy system; 2.the structure of energy flows in the building must accommodate multipleenergy processes in a manner that permits high overall efficiency; and 3.multiple qualities of electricity may be supplied to various buildingfunctions.

Marnay, Chris; Firestone, Ryan

2007-04-10T23:59:59.000Z

172

Control Strategies for Distributed Energy Resources to Maximize the Use of Wind Power in Rural Microgrids  

SciTech Connect (OSTI)

The focus of this paper is to design control strategies for distributed energy resources (DERs) to maximize the use of wind power in a rural microgrid. In such a system, it may be economical to harness wind power to reduce the consumption of fossil fuels for electricity production. In this work, we develop control strategies for DERs, including diesel generators, energy storage and demand response, to achieve high penetration of wind energy in a rural microgrid. Combinations of centralized (direct control) and decentralized (autonomous response) control strategies are investigated. Detailed dynamic models for a rural microgrid are built to conduct simulations. The system response to large disturbances and frequency regulation are tested. It is shown that optimal control coordination of DERs can be achieved to maintain system frequency while maximizing wind power usage and reducing the wear and tear on fossil fueled generators.

Lu, Shuai; Elizondo, Marcelo A.; Samaan, Nader A.; Kalsi, Karanjit; Mayhorn, Ebony T.; Diao, Ruisheng; Jin, Chunlian; Zhang, Yu

2011-10-10T23:59:59.000Z

173

A Framework for the Evaluation of the Cost and Benefits of Microgrids  

SciTech Connect (OSTI)

A Microgrid is recognized as an innovative technology to help integrate renewables into distribution systems and to provide additional benefits to a variety of stakeholders, such as offsetting infrastructure investments and improving the reliability of the local system. However, these systems require additional investments for control infrastructure, and as such, additional costs and the anticipated benefits need to be quantified in order to determine whether the investment is economically feasible. This paper proposes a methodology for systematizing and representing benefits and their interrelationships based on the UML Use Case paradigm, which allows complex systems to be represented in a concise, elegant format. This methodology is demonstrated by determining the economic feasibility of a Microgrid and Distributed Generation installed on a typical Canadian rural distribution system model as a case study. The study attempts to minimize the cost of energy served to the community, considering the fixed costs associated with Microgrids and Distributed Generation, and suggests benefits to a variety of stakeholders.

Morris, Greg Young; Abbey, Chad; Joos, Geza; Marnay, Chris

2011-07-15T23:59:59.000Z

174

Magnetic anisotropy in a permalloy microgrid fabricated by near-field optical lithography  

SciTech Connect (OSTI)

We report the fabrication and magnetic properties of permalloy microgrids prepared by near-field optical lithography and characterized using high-sensitivity magneto-optical Kerr effect techniques. A fourfold magnetic anisotropy induced by the grid architecture is identified. {copyright} 2001 American Institute of Physics.

Li, S. P.; Lebib, A.; Peyrade, D.; Natali, M.; Chen, Y.; Lew, W. S.; Bland, J. A. C.

2001-07-01T23:59:59.000Z

175

An Automatic Load Sharing Approach for a DFIG Based Wind Generator in a Microgrid  

E-Print Network [OSTI]

An Automatic Load Sharing Approach for a DFIG Based Wind Generator in a Microgrid M. A. Barik and H generator. An automatic load sharing approach for a doubly-fed induction generator (DFIG) based wind wind velocity. The load demand for the wind generator is determined based on the variation of its

Pota, Himanshu Roy

176

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

E-Print Network [OSTI]

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

Kammen, Daniel M.

177

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

E-Print Network [OSTI]

A Holonic Control Architecture for a Heterogeneous Multi-Objective Smart Micro-Grid Sylvain Frey proposes a holonic control architecture to help meet these requirements. We show how this architecture can holonic controller can manage a grid simulator in several scenarios. Obtained results support our belief

Diaconescu, Ada

178

Plug-and-play voltage and frequency control of islanded microgrids with meshed topology  

E-Print Network [OSTI]

decentralized control scheme for Islanded microGrids (ImGs) composed by the interconnection of Distributed Distributed Generation Units (DGUs) designed to operate safely and reliably in absence of a connection with the main grid. Besides fostering the use of renewable generation, ImGs bring distributed generation sources

Ferrari-Trecate, Giancarlo

179

Voltage and frequency control of islanded microgrids: a plug-and-play approach  

E-Print Network [OSTI]

of Distributed Generation Units (DGUs). Local controllers regulate voltage and frequency at the Point of Common-sufficient microgrids composed by several Distributed Generation Units (DGUs) and designed to operate safely, ImGs bring distributed generation sources close to loads and allow power to be delivered to rural

Ferrari-Trecate, Giancarlo

180

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

SciTech Connect (OSTI)

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

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

2010-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Effects of a carbon tax on microgrid combined heat and power adoption  

SciTech Connect (OSTI)

This paper describes the economically optimal adoption and operation of distributed energy resources (DER) by a hypothetical California microgrid consisting of a group of commercial buildings over an historic test year, 1999. The optimization is conducted using a customer adoption model (DER-CAM) developed at Berkeley Lab and implemented in the General Algebraic Modeling System (GAMS). A microgrid is a semiautonomous grouping of electricity and heat loads interconnected to the existing utility grid (macrogrid) but able to island from it. The microgrid minimizes the cost of meeting its energy requirements (consisting of both electricity and heat loads) by optimizing the installation and operation of DER technologies while purchasing residual energy from the local combined natural gas and electricity utility. The available DER technologies are small-scale generators (< 500 kW), such as reciprocating engines, microturbines, and fuel cells, with or without combined heat and power (CHP) equipment, such as water and space heating and/or absorption cooling. By introducing a tax on carbon emissions, it is shown that if the microgrid is allowed to install CHP-enabled DER technologies, its carbon emissions are mitigated more than without CHP, demonstrating the potential benefits of small-scale CHP technology for climate change mitigation. Reciprocating engines with heat recovery and/or absorption cooling tend to be attractive technologies for the mild southern California climate, but the carbon mitigation tends to be modest compared to purchasing utility electricity because of the predominance of relatively clean central station generation in California.

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

2004-11-01T23:59:59.000Z

182

Self-triggered Communication Enabled Control of Distributed Generation in Microgrids  

E-Print Network [OSTI]

Tahir Member, IEEE Dept. of Elect. Eng. and Al-Khwarizmi Institute of Comp. Science University. System reliability for secondary control in microgrids can be improved by using a distributed cooperative control approach. For realizing the cooperative control of multiple DGs in smart-grid, a multi-agent based

Mazumder, Sudip K.

183

RAMP: Impact of Rule Based Aggregator Business Model for Residential Microgrid of Prosumers  

E-Print Network [OSTI]

A microgrid is a localized and semi-autonomous group of distributed electrical energy resources (storage-house renewable generation, energy storage (including EV batteries), flexible electricity consumption (shifting Including Distributed Energy Resources Mohammad Abdullah Al Faruque Department of Electrical Engineering

Al Faruque, Mohammad Abdullah

184

Fine-Grained Remote Monitoring, Control and Pre-Paid Electrical Service in Rural Microgrids  

E-Print Network [OSTI]

, and improvements to telecommunications and supporting infrastructures, microgrids are becoming an increasingly with a cloud-based monitoring and control service, a local embedded gateway infrastructure and a mesh network of wireless smart meters deployed at 52 buildings. Each smart meter device has an 802.15.4 radio that enables

Goldstein, Seth Copen

185

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

SciTech Connect (OSTI)

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

Udhay Ravishankar; Milos manic

2013-08-01T23:59:59.000Z

186

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

E-Print Network [OSTI]

Vehicle to MicroGrid: Leveraging Existing Assets for Reliable Energy Management Mike Simpson, Tony Electricity GCV MicroGrid The Smith Electric Newton allelectric truckFort Carson Photovoltaic Installation ENERGY MANAGEMENT BUILDING ENERGY MANAGEMENT GRID OPERATION & RELIABILITY GRID OPERATION & RELIABILITY

187

Added Value of Reliability to a Microgrid: Simulations of Three California Buildings  

SciTech Connect (OSTI)

The Distributed Energy Resources Customer Adoption Model is used to estimate the value an Oakland nursing home, a Riverside high school, and a Sunnyvale data center would need to put on higher electricity service reliability for them to adopt a Consortium for Electric Reliability Technology Solutions Microgrid (CM) based on economics alone. A fraction of each building's load is deemed critical based on its mission, and the added cost of CM capability to meet it added to on-site generation options. The three sites are analyzed with various resources available as microgrid components. Results show that the value placed on higher reliability often does not have to be significant for CM to appear attractive, about 25 $/kWcdota and up, but the carbon footprint consequences are mixed because storage is often used to shift cheaper off-peak electricity to use during afternoon hours in competition with the solar sources.

Marnay, Chris; Lai, Judy; Stadler, Michael; Siddiqui, Afzal

2009-05-07T23:59:59.000Z

188

Assessment of the Economic Potential of Microgrids for Reactive Power Supply  

SciTech Connect (OSTI)

As power generation from variable distributed energy resources (DER) grows, energy flows in the network are changing, increasing the requirements for ancillary services, including voltage support. With the appropriate power converter, DER can provide ancillary services such as frequency control and voltage support. This paper outlines the economic potential of DERs coordinated in a microgrid to provide reactive power and voltage support at its point of common coupling. The DER Customer Adoption Model assesses the costs of providing reactive power, given local utility rules. Depending on the installed DER, the cost minimizing solution for supplying reactive power locally is chosen. Costs include the variable cost of the additional losses and the investment cost of appropriately over-sizing converters or purchasing capacitors. A case study of a large health care building in San Francisco is used to evaluate different revenue possibilities of creating an incentive for microgrids to provide reactive power.

Appen, Jan von; Marnay, Chris; Stadler, Michael; Momber, Ilan; Klapp, David; Scheven, Alexander von

2011-05-01T23:59:59.000Z

189

RESEARCH ARTICLE OPEN ACCESS Cost and Stability Analysis of Microgrids in Presence Of Evs Based On Dynamic Modeling  

E-Print Network [OSTI]

Development of Electrical Vehicles (EVs) has been created many challenges and also advantages for grids. One of the most important subjects is capability of which as energy storage device. In this paper, role of EVs has been studied as useful element in microgrids as energy storage device to reduce

Farzad Vazinram; Majid G; Mehdi Bayat Mokhtari

190

Carbyne contamination in carbon-coated TEM microgrids made from vacuum-resistive heating deposition from a graphite rod  

SciTech Connect (OSTI)

Carbyne contamination was found to exist on the as-prepared carbon-coated transmission electron microscope (TEM) microgrids made by the method of vacuum-resistive heating deposition from a graphite rod. It is a source to bring mistaken and confusing information to the samples being studied by TEM.

Li Hanying; Sun Jingzhi; Wang Youwen; Chen Hongzheng; Cao Jian; Wang Mang

2004-03-15T23:59:59.000Z

191

Plug-and-Play Control and Optimization in Microgrids Florian Dorfler, John W. Simpson-Porco, and Francesco Bullo  

E-Print Network [OSTI]

Plug-and-Play Control and Optimization in Microgrids Florian D¨orfler, John W. Simpson results and detailed discussions is available at [1]. F. D¨orfler is with the Department of Electrical Engineering, Univer- sity of California Los Angeles. Email: dorfler@seas.ucla.edu. J. W. Simpson-Porco and F

Bullo, Francesco

192

Voltage Stabilization in Microgrids via Quadratic Droop Control John W. Simpson-Porco, Florian Dorfler, and Francesco Bullo  

E-Print Network [OSTI]

Voltage Stabilization in Microgrids via Quadratic Droop Control John W. Simpson-Porco, Florian D¨orfler of California Santa Barbara. Email: {johnwsimpsonporco,bullo}@engineering.ucsb.edu. F. D¨orfler is with the Department of Electrical Engineering, University of California Los Angeles. Email: dorfler@seas.ucla.edu. (a

Bullo, Francesco

193

Copyright 2013 IEEE. Reprinted, with permission from: CERTS Microgrid Demonstration with Large-Scale Energy Storage and  

E-Print Network [OSTI]

-Scale Energy Storage and Renewable Generation Eduardo Alegria, Member, IEEE; Tim Brown, Member, IEEE; Erin Minear, Member, IEEE; Robert H. Lasseter, Fellow, IEEE Submitted to "Energy Storage Applications--Distributed Generation, Distributed Resource, Islanding, Microgrid, Smart Grid, Renewable Energy, Advanced Energy Storage

194

Abstract --With the increasing acceptance, micro-grid, combined with distributed generation (DG), may be operated in  

E-Print Network [OSTI]

Abstract --With the increasing acceptance, micro-grid, combined with distributed generation (DG generation (DG) technology [1-3]. DG units may be located in distribution network or on the local load side), may be operated in two modes: grid-connected mode and island mode. In grid connected mode, energy

Chen, Zhe

195

This document is a preprint of the final paper: Savaghebi, M.; Jalilian, A.; Vasquez, J. C.; Guerrero, J. M.; , "Secondary Control for Voltage Quality Enhancement in Microgrids," Smart Grid, IEEE Transactions on , vol.3, no.4, pp.1893-1902, Dec. 2012. doi  

E-Print Network [OSTI]

.; Guerrero, J. M.; , "Secondary Control for Voltage Quality Enhancement in Microgrids," Smart Grid, IEEE for enhancement of Sensitive Load Bus (SLB) voltage quality in microgrids. The control structure consists control scheme. Index Terms--Distributed Generator (DG), microgrid, voltage harmonics, voltage unbalance

Vasquez, Juan Carlos

196

This document is a preprint of the final paper: Savaghebi, M.; Vasquez, J.C.; Jalilian, A.; Guerrero, J.M.; Tzung-Lin Lee; , "Selective harmonic virtual impedance for voltage source inverters with LCL filter in microgrids," Energy Conversion  

E-Print Network [OSTI]

, a microgrid is defined as a group of distributed generators and energy storage systems which could operate countries, the distributed generation (DG) equipment, normally connected to the grid, is not allowed independently from the main grid. The standard defines the islanded operation of microgrids [2]. In many

Vasquez, Juan Carlos

197

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

E-Print Network [OSTI]

.; , "Distributed secondary control for islanded MicroGrids - A networked control systems approach," IECON 2012 - 38://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6389034&isnumber=6388505 1 Distributed Secondary Control for Islanded MicroGrids ­ A Networked Control such as power electronics converters, distributed generations (DGs), energy storage systems

Vasquez, Juan Carlos

198

Decoding the `Nature Encoded' Messages for Distributed Energy Generation Control in Microgrid  

E-Print Network [OSTI]

The communication for the control of distributed energy generation (DEG) in microgrid is discussed. Due to the requirement of realtime transmission, weak or no explicit channel coding is used for the message of system state. To protect the reliability of the uncoded or weakly encoded messages, the system dynamics are considered as a `nature encoding' similar to convolution code, due to its redundancy in time. For systems with or without explicit channel coding, two decoding procedures based on Kalman filtering and Pearl's Belief Propagation, in a similar manner to Turbo processing in traditional data communication systems, are proposed. Numerical simulations have demonstrated the validity of the schemes, using a linear model of electric generator dynamic system.

Gong, Shuping; Lai, Lifeng; Qiu, Robert C

2010-01-01T23:59:59.000Z

199

Effect of Heat and Electricity Storage and Reliability on Microgrid Viability: A Study of Commercial Buildings in California and New York States  

SciTech Connect (OSTI)

Berkeley Lab has for several years been developing methods for selection of optimal microgrid systems, especially for commercial building applications, and applying these methods in the Distributed Energy Resources Customer Adoption Model (DER-CAM). This project began with 3 major goals: (1) to conduct detailed analysis to find the optimal equipment combination for microgrids at a few promising commercial building hosts in the two favorable markets of California and New York, (2) to extend the analysis capability of DER-CAM to include both heat and electricity storage, and (3) to make an initial effort towards adding consideration of power quality and reliability (PQR) to the capabilities of DER-CAM. All of these objectives have been pursued via analysis of the attractiveness of a Consortium for Electric Reliability Technology Solutions (CERTS) Microgrid consisting of multiple nameplate 100 kW Tecogen Premium Power Modules (CM-100). This unit consists of an asynchronous inverter-based variable speed internal combustion engine genset with combined heat and power (CHP) and power surge capability. The essence of CERTS Microgrid technology is that smarts added to the on-board power electronics of any microgrid device enables stable and safe islanded operation without the need for complex fast supervisory controls. This approach allows plug and play development of a microgrid that can potentially provide high PQR with a minimum of specialized site-specific engineering. A notable feature of the CM-100 is its time-limited surge rating of 125 kW, and DER-CAM capability to model this feature was also a necessary model enhancement.

Stadler, Michael; Marnay, Chris; Siddiqui, Afzal; Lai, Judy; Coffey, Brian; Aki, Hirohisa

2009-03-10T23:59:59.000Z

200

Facility Microgrids  

E-Print Network [OSTI]

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, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States government or any agency thereof. Available electronically at

Office Of Energy Efficiency; Renewable Energy; Z. Ye; R. Walling; N. Miller; P. Du; K. Nelson; Z. Ye; R. Walling; N. Miller; P. Du; K. Nelson

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

On Reactive Power Flow and Voltage Stability in Microgrids Basilio Gentile, John W. Simpson-Porco, Florian Dorfler, Sandro Zampieri, and Francesco Bullo  

E-Print Network [OSTI]

], where an approximate solution to the reactive power flow equations was developed for electrical networksOn Reactive Power Flow and Voltage Stability in Microgrids Basilio Gentile, John W. Simpson-Porco, Florian D¨orfler, Sandro Zampieri, and Francesco Bullo Abstract-- This paper focuses on reactive power

Bullo, Francesco

202

54 IEEE power & energy magazine may/june 20081540-7977/08/$25.00©2008 IEEE T THE ENVIRONMENTAL AND ECONOMICAL BENEFITS OF THE MICROGRID, AND  

E-Print Network [OSTI]

and power quality constraints, and market participation strategies, the required control and operational strategies of a microgrid can be significantly, and even conceptually, dif-ferent than those of the conventional power systems. The main reasons are as follows: ? steady-state and dynamic

unknown authors

203

Bulk Power System Dynamics and Control -VII, August 19-24, 2007, Charleston, South Carolina, USA Dynamics of a Microgrid Supplied by Solid Oxide Fuel Cells1  

E-Print Network [OSTI]

. The results of an example in which two SOFC plants provide power to a microgrid are presented. The simulation1 Bulk Power System Dynamics and Control - VII, August 19-24, 2007, Charleston, South Carolina, USA, but is not concerned with the thermal dynamics. A DC-DC boost converter interfaces the SOFC stack to a DC bus, where

Hiskens, Ian A.

204

Panel on Microgrids Systems International Conference on System of Systems Engineering, April 16-18, 2007 San Antonio Abstract--Application of individual distributed generators can  

E-Print Network [OSTI]

are included. Keywords: CHP, UPS, distributed generation, intentional islanding, inverters, microgrid, power vs-18, 2007 San Antonio Abstract--Application of individual distributed generators can cause as many problems as it may solve. A better way to realize the emerging potential of distributed generation is to take

205

Text of article published in IEEE Smart Grid, March 2012. http://smartgrid.ieee.org/march-2012/527-microgrids-an-emerging-technology-to-enhance-power-system-  

E-Print Network [OSTI]

Text of article published in IEEE Smart Grid, March 2012. http://smartgrid.ieee.org/march-2012 of the recommendations of the Smart Grid Initiative [1]. While the microgrid may possess several advantages, including electricity grid are compromised, thus subjecting huge sections of the population to erratic supply

206

This document is a preprint version of the final paper: M. Soshinskaya, W. H. J. Graus, J. M. Guerrero, and J. C. Vasquez, "Microgrids: experiences, barriers and success factors," Renewable and Sustainable Energy Reviews, 2014 Elsevier.  

E-Print Network [OSTI]

and Sustainable Energy Reviews, 2014 ­ Elsevier. Microgrids: experiences, barriers and success factors Mariya of Sustainable Development, Utrecht University, The Netherlands b Department of Energy Technology, Aalborg; Renewable Energy; Islanding; Distributed Generation; Energy Storage; Barriers Acronyms greenhouse gas (GHG

Vasquez, Juan Carlos

207

Effects of a carbon tax on combined heat and power adoption by a microgrid  

SciTech Connect (OSTI)

This paper describes the economically optimal adoption and operation of distributed energy resources (DER) by a hypothetical California microgrid ((mu)Grid) consisting of a group of commercial buildings over an historic test year, 1999. The optimization is conducted using a customer adoption model (DER-CAM) developed at Berkeley Lab and implemented in the General Algebraic Modeling System (GAMS). A (mu)Grid is a semiautonomous grouping of electricity and heat loads interconnected to the existing utility grid (macrogrid) but able to island from it. The (mu)Grid minimizes the cost of meeting its energy requirements (consisting of both electricity and heat loads) by optimizing the installation and operation of DER technologies while purchasing residual energy from the local combined natural gas and electricity utility. The available DER technologies are small-scale generators (< 500 kW), such as reciprocating engines, microturbines, and fuel cells, with or without CHP equipment, such as water- and space-heating and/or absorption cooling. By introducing a tax on carbon emissions, it is shown that if the (mu)Grid is allowed to install CHP-enabled DER technologies, its carbon emissions are mitigated more than without CHP, demonstrating the potential benefits of small-scale CHP technology for climate change mitigation. Reciprocating engines with heat recovery and/or absorption cooling tend to be attractive technologies for the mild southern California climate, but the carbon mitigation tends to be modest compared to purchasing utility electricity because of the predominance of relatively clean generation in California.

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

2002-10-01T23:59:59.000Z

208

This document downloaded from www.microgrids.et.aau.dk is a preprint version from the paper: L. Meng, T. Dragicevic, J.M. Guerrero, J.C. Vasquez, M. Savaghebi, F. Tang, "Agent-based distributed unbalance compensation for optimal power quality in  

E-Print Network [OSTI]

-based Distributed Unbalance Compensation for Optimal Power Quality in Islanded Microgrids Lexuan Meng, Tomislav, the distributed generators (DG) can be used as distributed compensators so as to compensate the voltage unbalances as to compensate the unbalances at the critical bus. In case of microgrids, distributed generators (DGs) can

Vasquez, Juan Carlos

209

Validated SCR Concept Development  

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

* CAE package study (urea tank, exhaust line) * Kinetic aftertreatment modeling (1D -> 3D) -> Validated model chain SCR concept development: * Optimization of SCR concept: *...

210

revision:19970323 modified:19970323  

E-Print Network [OSTI]

596 revision:1997­03­23 modified:1997­03­23 Some independence results on reflection James Cummings. Publication number 596. 1 #12; 596 revision:1997­03­23 modified:1997­03­23 Baumgartner proved in [1­reflection principle captures 2 #12; 596 revision:1997­03­23 modified:1997­03­23 exactly that part of # which is useful

Shelah, Saharon

211

The Added Economic and Environmental Value of Solar Thermal Systems in Microgrids with CombinedHeat and Power  

SciTech Connect (OSTI)

The addition of solar thermal and heat storage systems can improve the economic, as well as environmental attraction of micro-generation systems, e.g. fuel cells with or without combined heat and power (CHP) and contribute to enhanced CO2 reduction. However, the interactions between solar thermal collection and storage systems and CHP systems can be complex, depending on the tariff structure, load profile, etc. In order to examine the impact of solar thermal and heat storage on CO2 emissions and annual energy costs, a microgrid's distributed energy resources (DER) adoption problem is formulated as a mixed-integer linear program. The objective is minimization of annual energy costs. This paper focuses on analysis of the optimal interaction of solar thermal systems, which can be used for domestic hot water, space heating and/or cooling, and micro-CHP systems in the California service territory of San Diego Gas and Electric (SDG&E). Contrary to typical expectations, our results indicate that despite the high solar radiation in southern California, fossil based CHP units are dominant, even with forecast 2020 technology and costs. A CO2 pricing scheme would be needed to incent installation of combined solar thermal absorption chiller systems, and no heat storage systems are adopted. This research also shows that photovoltaic (PV) arrays are favored by CO2 pricing more than solar thermal adoption.

Marnay, Chris; Stadler, Michael; Cardoso, Goncalo; Megel, Olivier; Lai, Judy; Siddiqui, Afzal

2009-08-15T23:59:59.000Z

212

revision:20090902 modified:20090903  

E-Print Network [OSTI]

871 revision:2009­09­02 modified:2009­09­03 A trichotomy of countable, stable, unsuperstable and DMS 0600940 and Israel Science Foundation Grant no. 242/03. Publica­ tion 871. 1 #12; 871 revision of formulas (see Definition 2.3). The origins of these 2 #12; 871 revision:2009­09­02 modified:2009

Shelah, Saharon

213

Why Two Grids Can Be Better Than One: How the CERTS Microgrid Evolved from  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector GeneralDepartment of EnergyofProject isNovember 07, 2007What Is theEnergyConcept to Practice |

214

Common tester platform concept.  

SciTech Connect (OSTI)

This report summarizes the results of a case study on the doctrine of a common tester platform, a concept of a standardized platform that can be applicable across the broad spectrum of testing requirements throughout the various stages of a weapons program, as well as across the various weapons programs. The common tester concept strives to define an affordable, next-generation design that will meet testing requirements with the flexibility to grow and expand; supporting the initial development stages of a weapons program through to the final production and surveillance stages. This report discusses a concept investing key leveraging technologies and operational concepts combined with prototype tester-development experiences and practical lessons learned gleaned from past weapons programs.

Hurst, Michael James

2008-05-01T23:59:59.000Z

215

revision:19960317 modified:19960317  

E-Print Network [OSTI]

restrict our­ self to certain concrete classes then we may be able to retain compactness. In this paper we375 revision:1996­03­17 modified:1996­03­17 Some Compact Logics ­ Results in ZFC Alan H. Mekler order logic is so strong that it fails to have nice model theoretic properties such as compactness

Shelah, Saharon

216

Modified Faraday cup  

DOE Patents [OSTI]

A tomographic technique for measuring the current density distribution in electron beams using electron beam profile data acquired from a modified Faraday cup to create an image of the current density in high and low power beams is disclosed. The modified Faraday cup includes a narrow slit and is rotated by a stepper motor and can be moved in the x, y and z directions. The beam is swept across the slit perpendicular thereto and controlled by deflection coils, and the slit rotated such that waveforms are taken every few degrees from 0{degree} to 360{degree} and the waveforms are recorded by a digitizing storage oscilloscope. Two-dimensional and three-dimensional images of the current density distribution in the beam can be reconstructed by computer tomography from this information, providing quantitative information about the beam focus and alignment. 12 figs.

Elmer, J.W.; Teruya, A.T.; O`Brien, D.W.

1996-09-10T23:59:59.000Z

217

Modified Faraday cup  

DOE Patents [OSTI]

A tomographic technique for measuring the current density distribution in electron beams using electron beam profile data acquired from a modified Faraday cup to create an image of the current density in high and low power beams. The modified Faraday cup includes a narrow slit and is rotated by a stepper motor and can be moved in the x, y and z directions. The beam is swept across the slit perpendicular thereto and controlled by deflection coils, and the slit rotated such that waveforms are taken every few degrees form 0.degree. to 360.degree. and the waveforms are recorded by a digitizing storage oscilloscope. Two-din-tensional and three-dimensional images of the current density distribution in the beam can be reconstructed by computer tomography from this information, providing quantitative information about the beam focus and alignment.

Elmer, John W. (Pleasanton, CA); Teruya, Alan T. (Livermore, CA); O'Brien, Dennis W. (Livermore, CA)

1996-01-01T23:59:59.000Z

218

The Modified Dirac Equation  

E-Print Network [OSTI]

We consider the behavior of the particles at ultra relativistic energies, for both the Klein-Gordon and Dirac equations. We observe that the usual description is valid for energies such that we are outside the particle's Compton wavelength. For higher energies however, both the Klein-Gordon and Dirac equations get modified and this leads to some new effects for the particles, including the appearance of anti particles with a slightly different energy.

Burra G. Sidharth

2009-11-10T23:59:59.000Z

219

Effect of Heat and Electricity Storage and Reliability on Microgrid Viability:A Study of Commercial Buildings in California and New York States  

SciTech Connect (OSTI)

In past work, Berkeley Lab has developed the Distributed Energy Resources Customer Adoption Model (DER-CAM). Given end-use energy details for a facility, a description of its economic environment and a menu of available equipment, DER-CAM finds the optimal investment portfolio and its operating schedule which together minimize the cost of meeting site service, e.g., cooling, heating, requirements. Past studies have considered combined heat and power (CHP) technologies. Methods and software have been developed to solve this problem, finding optimal solutions which take simultaneity into account. This project aims to extend on those prior capabilities in two key dimensions. In this research storage technologies have been added as well as power quality and reliability (PQR) features that provide the ability to value the additional indirect reliability benefit derived from Consortium for Electricity Reliability Technology Solutions (CERTS) Microgrid capability. This project is intended to determine how attractive on-site generation becomes to a medium-sized commercial site if economical storage (both electrical and thermal), CHP opportunities, and PQR benefits are provided in addition to avoiding electricity purchases. On-site electrical storage, generators, and the ability to seamlessly connect and disconnect from utility service would provide the facility with ride-through capability for minor grid disturbances. Three building types in both California and New York are assumed to have a share of their sensitive electrical load separable. Providing enhanced service to this load fraction has an unknown value to the facility, which is estimated analytically. In summary, this project began with 3 major goals: (1) to conduct detailed analysis to find the optimal equipment combination for microgrids at a few promising commercial building hosts in the two favorable markets of California and New York; (2) to extend the analysis capability of DER-CAM to include both heat and electricity storage; and (3) to make an initial effort towards adding consideration of PQR into the capabilities of DER-CAM.

Stadler, Michael; Marnay, Chris; Siddiqui, Afzal; Lai, Judy; Coffey, Brian; Aki, Hirohisa

2008-12-01T23:59:59.000Z

220

Concept of Operations: Essence  

SciTech Connect (OSTI)

This concept of operations is designed to give the reader a brief overview of the National Rural Electric Cooperative Association’s Essence project and a description of the Essence device design. The data collected by the device, how the data are used, and how the data are protected are also discussed in this document.

Hutton, William J.

2014-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Biodiversity Concepts and  

E-Print Network [OSTI]

Biodiversity Concepts and Measures Dr. Stacy Philpott Conservation Biology EEES 4750/5750/7750 #12;Biodiversity · What is biodiversity? · How much biodiversity is there? · Where is biodiversity found? · How do we measure biodiversity? · How do we collect and analyze biodiversity data? #12;Biodiversity · What

Gottgens, Hans

222

Sophia Proof of Concept Report  

SciTech Connect (OSTI)

Final report covering the development, deployment and lessons learning while making the Sophia proof of concept.

Gordon Rueff; Corey Thuen; James Davidson

2010-03-01T23:59:59.000Z

223

Separations innovative concepts: Project summary  

SciTech Connect (OSTI)

This project summary includes the results of 10 innovations that were funded under the US Department's Innovative Concept Programs. The concepts address innovations that can substantially reduce the energy used in industrial separations. Each paper describes the proposed concept, and discusses the concept's potential energy savings, market applications, technical feasibility, prior work and state of the art, and future development needs.

Lee, V.E. (ed.)

1988-05-01T23:59:59.000Z

224

On Modified Gravity  

E-Print Network [OSTI]

We consider some aspects of nonlocal modified gravity, where nonlocality is of the type $R \\mathcal{F}(\\Box) R$. In particular, using ansatz of the form $\\Box R = c R^\\gamma,$ we find a few $R(t)$ solutions for the spatially flat FLRW metric. There are singular and nonsingular bounce solutions. For late cosmic time, scalar curvature R(t) is in low regime and scale factor a(t) is decelerated. R (t) = 0 satisfies all equations when k = -1.

Ivan Dimitrijevic; Branko Dragovich; Jelena Grujic; Zoran Rakic

2012-04-09T23:59:59.000Z

225

Use-driven concept formation  

E-Print Network [OSTI]

When faced with a complex task, humans often identify domain-specific concepts that make the task more tractable. In this thesis, I investigate the formation of domain-specific concepts of this sort. I propose a set of ...

Roberts, Jennifer M. (Jennifer Marie)

2010-01-01T23:59:59.000Z

226

Securities trading of concepts (STOC)  

E-Print Network [OSTI]

Identifying winning new product concepts can be a challenging process that requires insight into private consumer preferences. To measure consumer preferences for new product concepts, the authors apply a “securities trading ...

Dahan, Ely

227

Modified clay sorbents  

DOE Patents [OSTI]

A novel modified clay sorbent and method of treating industrial effluents to remove trace pollutants, such as dioxins, biphenyls, and polyaromatics such as benzo(a)pyrene and pentachlorophenol. The novel clay sorbent has a composite structure in which the interlayer space of an expandable clay, such as smectite, is filled with polyvalent or multivalent inorganic cations which forces weaker surfactant cations to locate on the surface of the clay in such an orientation that the resulting composite is hydrophilic in nature. A specific example is cetylpyridinium-hydroxy aluminum-montmorillonite. In certain embodiments, a non-expanding clay, such as kaolinite, is used and surfactant cations are necessarily located on an external surface of the clay. A specific example is cetylpyridinium-kaolinite.

Fogler, H. Scott (Ann Arbor, MI); Srinivasan, Keeran R. (Livonia, MI)

1990-01-01T23:59:59.000Z

228

Peru modifies contractors' terms  

SciTech Connect (OSTI)

With both proved hydrocarbon reserves and daily production figures in trouble, Peru has moved to make its participation contracts more attractive to foreign contractors. To reverse this downward trend, Petroperu officials are visiting U.S. companies to explain policy changes designed to make work in Peru more attractive. Peru has instituted a cost recovery concept for contractors that can be implemented with no change in current law. This system ensures the contractor recovery of his investment and grants a profit percentage inversely proportional to production, introducing more rational incentives for private investment without affecting state participation in the long run. Contractors can also work on a service contract in which all production goes to Petroperu in exchange for a predetermined tariff per barrel. A third option to foreign contractors is work on several secondary recovery projects scheduled to be performed.

Not Available

1985-05-01T23:59:59.000Z

229

Polyoxometalate-Graphene Nanocomposite Modified Electrode for...  

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

Polyoxometalate-Graphene Nanocomposite Modified Electrode for Electrocatalytic Detection of Ascorbic Acid. Polyoxometalate-Graphene Nanocomposite Modified Electrode for...

230

Demoing the Modified TALON Robot  

Broader source: Energy.gov [DOE]

A technician at Idaho National Laboratory demonstrates the modified TALON robot; which is being sent to assist emergency workers at Japan's Fukishima nuclear reactor.

231

Modified Theories of Gravity  

E-Print Network [OSTI]

The recent observational data in cosmology seem to indicate that the universe is currently expanding in an accelerated way. An intriguing interpretation of these data is that they may just be signalling that Einstein's General Relativity is not the correct description of gravity when we consider distances of the order of the present horizon of the universe. In this thesis we consider two models which modify General Relativity at very large distances, the Cascading DGP and the dRGT massive gravity, and investigate their phenomenological viability. We start with a general introduction to standard cosmology and we introduce the late time acceleration problem and the cosmological constant problem. We then provide a pedagogical introduction to the DGP model, of which the Cascading DGP is an extension, and to the dRGT massive gravity. Concerning the Cascading DGP, we show that the thin limit of the 4D brane inside the (already thin) 5D brane is well defined, at least for the class of configurations that we consider...

Sbisŕ, Fulvio

2014-01-01T23:59:59.000Z

232

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network [OSTI]

. In each plot the data is formatted in the following fashion: Ch1 = Unit RMS Power Output; 0.0V = -15KW 0 of the load and the individual micro gird inverters (abbreviated S.P) and the actual load of the load bank has occurred. A (Grid or Island) B (Grid or Island) Load Bank #1(S.P/Actual) KW XX KW XX KW Load Bank

233

Building Scale DC Microgrids  

E-Print Network [OSTI]

resources, a 10 kW vertical axis wind turbine, and Fig. 4AC-grid Fig. 3. Vertical axis wind turbine in the AIT DC µ

Marnay, Chris

2013-01-01T23:59:59.000Z

234

Building Scale DC Microgrids  

E-Print Network [OSTI]

resources, a 10 kW vertical axis wind turbine, and Fig. 4the µgrid Fig. 3. Vertical axis wind turbine in the AIT DC µ

Marnay, Chris

2014-01-01T23:59:59.000Z

235

Building Scale DC Microgrids  

E-Print Network [OSTI]

Efficiency and Renewable Energy, Building TechnologiesEfficiency and Renewable Energy, Building Technologies

Marnay, Chris

2013-01-01T23:59:59.000Z

236

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network [OSTI]

-up. The unit generates power in a stand-alone mode (no grid-tie) and is connected to a load bank. The output of the transformer is wired to the load bank in a 4-wire configuration with a 25-yard loop. The inverter is also equipped with a Surge Module wired directly to the DC Bus. The Surge Module is a battery powered energy

237

Sandia National Laboratories: Microgrid  

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

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

238

Building Scale DC Microgrids  

E-Print Network [OSTI]

Folsom CA, Integration of Renewable Resources: OperationalOffice of Energy Efficiency and Renewable Energy, Buildingwas only the world’s renewable generation almost triples,

Marnay, Chris

2014-01-01T23:59:59.000Z

239

Building Scale DC Microgrids  

E-Print Network [OSTI]

Folsom CA, Integration of Renewable Resources: OperationalOffice of Energy Efficiency and Renewable Energy, BuildingOffice of Energy Efficiency and Renewable Energy, Building

Marnay, Chris

2013-01-01T23:59:59.000Z

240

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network [OSTI]

) .............................................................................. 5 8. TECOGEN Engine Control equipment. b. Nuisance trips can be expected at ~10 times the continuous current rating due to the magnetic

Note: This page contains sample records for the topic "modified microgrid concept" 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

Sandia National Laboratories: Microgrid  

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

Their report will focus on system ... ECIS-Princeton Power Systems, Inc.: Demand Response Inverter On March 19, 2013, in DETL, Distribution Grid Integration,...

242

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network [OSTI]

meet IEEE Standard 1547 for interconnecting DR with electric power systems. Since these tests Investigator Berkeley, CA 94720 Harry Volkommer and Dave Klapp, American Electric Power Commission Contract No Manager ENERGY SYSTEMS RESEARCH Martha Krebs, Ph.D. PIER Director Thom Kelly, Ph.D. Deputy Director ENERGY

243

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network [OSTI]

Volkommer and Dave Klapp, American Electric Power Commission Contract No. 500-03-024 Prepared For: Public Program Area Lead ENERGY SYSTEMS INTEGRATION Mike Gravely Office Manager ENERGY SYSTEMS RESEARCH Martha Loads Prepared For: California Energy Commission Public Interest Energy Research Program Prepared By

244

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network [OSTI]

Electric Power Ed Linton and Hector Hurtado, Northern Power Systems Jean Roy, Tecogen, Inc. Nancy Lewis Program Area Lead Energy Systems Integration Mike Gravely Office Manager Energy Systems Research Martha For: California Energy Commission Public Interest Energy Research Program Prepared By: Lawrence

245

2012 Microgrid Workshop Report  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up from theDepartment( SampleEnergyof Environmental Management |FY12Sustainable,2 DOE

246

Sandia National Laboratories: microgrid  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1developmentturbine bladelifetime is themicrodesign Sandia,

247

Sandia National Laboratories: Microgrid  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive SolarEducationStation TechnologyWindInternational Smart Grid

248

Sandia National Laboratories: Microgrid  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -theErik Spoerke SSLS ExhibitIowaLosSandia Participated inProgramMicroalgaeHoboken,

249

Sandia National Laboratories: Microgrid  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -theErik Spoerke SSLS ExhibitIowaLosSandia Participated

250

Arnold Schwarzenegger CERTS MICROGRID  

E-Print Network [OSTI]

-compliant generation behind it, is a major accomplishment. The team has confirmed that a static switch is very fast, American Electric Power Meeting Purpose: Introduce test bed results; initiate technical review process translates to more affordable. Demonstration that static switch can comply with 1547, with non

251

PID Control Effectiveness for Surface Reactor Concepts  

SciTech Connect (OSTI)

Control of space and surface fission reactors should be kept as simple as possible, because of the need for high reliability and the difficulty to diagnose and adapt to control system failures. Fortunately, compact, fast-spectrum, externally controlled reactors are very simple in operation. In fact, for some applications it may be possible to design low-power surface reactors without the need for any reactor control after startup; however, a simple proportional, integral, derivative (PID) controller can allow a higher performance concept and add more flexibility to system operation. This paper investigates the effectiveness of a PID control scheme for several anticipated transients that a surface reactor might experience. To perform these analyses, the surface reactor transient code FRINK was modified to simulate control drum movements based on bulk coolant temperature.

Dixon, David D. [North Carolina State University, Raleigh, NC (United States); Los Alamos National Laboratory, Los Alamos, NM (United States); Marsh, Christopher L. [United States Naval Academy, Annapolis, MD (United States); Los Alamos National Laboratory, Los Alamos, NM (United States); Poston, David I. [Los Alamos National Laboratory, Los Alamos, NM (United States)

2007-01-30T23:59:59.000Z

252

Modified Theories of Gravity  

E-Print Network [OSTI]

The recent observational data in cosmology seem to indicate that the universe is currently expanding in an accelerated way. An intriguing interpretation of these data is that they may just be signalling that Einstein's General Relativity is not the correct description of gravity when we consider distances of the order of the present horizon of the universe. In this thesis we consider two models which modify General Relativity at very large distances, the Cascading DGP and the dRGT massive gravity, and investigate their phenomenological viability. We start with a general introduction to standard cosmology and we introduce the late time acceleration problem and the cosmological constant problem. We then provide a pedagogical introduction to the DGP model, of which the Cascading DGP is an extension, and to the dRGT massive gravity. Concerning the Cascading DGP, we show that the thin limit of the 4D brane inside the (already thin) 5D brane is well defined, at least for the class of configurations that we consider, and confirm that gravity is regularized in these set-ups. We give a geometrical interpretation of the presence of the critical tension, and comment on the difference between the results in the literature and our results, which we support with a numerical calculation. Regarding the dRGT massive gravity, we focus on the branch of solutions in which the Vainshtein mechanism can occur. We determine analytically the number and properties of local solutions which exist asymptotically on large scales (but still below the gravitational Compton wavelength), and of local (inner) solutions which exist on small scales. We characterize exactly the properties of global solutions in every point of the phase space, and characterize precisely in which regions the Vainshtein mechanism takes place. We also provide numerical solutions which confirm our analysis.

Fulvio Sbisa'

2014-07-09T23:59:59.000Z

253

A Centrality Detector Concept  

E-Print Network [OSTI]

The nucleus-nucleus impact parameter and collision geometry of a heavy ion collision are typically characterized by assigning a collision "centrality". In all present heavy ion experiments centrality is measured indirectly, by detecting the number of particles or the energy of the particles produced in the interactions, typically at high rapidity. Centrality parameters are associated to the measured detector response using the Glauber model. This approach suffers from systematic uncertainties related to the assumptions about the particle production mechanism and limitations of the Glauber model. In the collider based experiments there is a unique possibility to measure centrality parameters by registering spectator fragments remaining from the collision. This approach does not require model assumptions and relies on the fact that spectators and participants are related via the total number of nucleons in the colliding species. This article describes the concept of the centrality detector for heavy ion experiment, which measures the total mass number of all fragments by measuring their deflection in the magnetic field of the collider elements.

Sourav Tarafdar; Zvi Citron; Alexander Milov

2014-06-07T23:59:59.000Z

254

2 IEEE TRANSACTIONS ON CIRCUIT THEORY, VOL. CT-16, NO. 1, BBBRUARY 1969 The Modified Circuit Matrix of an &Port  

E-Print Network [OSTI]

of an &Port Network and Its Applications KRISIINAIYAN THULASIRAMRN AND VEMPATI G. I Abstracf-Certain properties of the modified circuit matrix useful in the analysis and synthesis of n-port pseudoseries connection of n-port networks. The use- fulness of the concept of the modified circuit matrix

Thulsiraman, Krishnaiyan

255

Re-evaluation of monitored retrievable storage concepts  

SciTech Connect (OSTI)

In 1983, as a prelude to the monitored retrievable storage (MRS) facility conceptual design, the Pacific Northwest Laboratory (PNL) conducted an evaluation for the US Department of Energy (DOE) that examined alternative concepts for storing spent LWR fuel and high- level wastes from fuel reprocessing. The evaluation was made considering nine concepts for dry away-from-reactor storage. The nine concepts evaluated were: concrete storage cask, tunnel drywell, concrete cask-in-trench, open-cycle vault, metal casks (transportable and stationary), closed-cycle vault, field drywell, and tunnel-rack vault. The purpose and scope of the re-evaluation did not require a repetition of the expert-based examinations used earlier. Instead, it was based on more detailed technical review by a small group, focusing on changes that had occurred since the initial evaluation was made. Two additional storage concepts--the water pool and the horizontal modular storage vault (NUHOMS system)--were ranked along with the original nine. The original nine concepts and the added two conceptual designs were modified as appropriate for a scenario with storage capacity for 15,000 MTU of spent fuel. Costs, area requirements, and technical and historical data pertaining to MRS storage were updated for each concept.

Fletcher, J.F.; Smith, R.I.

1989-04-01T23:59:59.000Z

256

ADVANCED SULFUR CONTROL CONCEPTS  

SciTech Connect (OSTI)

Conventional sulfur removal in integrated gasification combined cycle (IGCC) power plants involves numerous steps: COS (carbonyl sulfide) hydrolysis, amine scrubbing/regeneration, Claus process, and tail-gas treatment. Advanced sulfur removal in IGCC systems involves typically the use of zinc oxide-based sorbents. The sulfides sorbent is regenerated using dilute air to produce a dilute SO{sub 2} (sulfur dioxide) tail gas. Under previous contracts the highly effective first generation Direct Sulfur Recovery Process (DSRP) for catalytic reduction of this SO{sub 2} tail gas to elemental sulfur was developed. This process is currently undergoing field-testing. In this project, advanced concepts were evaluated to reduce the number of unit operations in sulfur removal and recovery. Substantial effort was directed towards developing sorbents that could be directly regenerated to elemental sulfur in an Advanced Hot Gas Process (AHGP). Development of this process has been described in detail in Appendices A-F. RTI began the development of the Single-step Sulfur Recovery Process (SSRP) to eliminate the use of sorbents and multiple reactors in sulfur removal and recovery. This process showed promising preliminary results and thus further process development of AHGP was abandoned in favor of SSRP. The SSRP is a direct Claus process that consists of injecting SO{sub 2} directly into the quenched coal gas from a coal gasifier, and reacting the H{sub 2}S-SO{sub 2} mixture over a selective catalyst to both remove and recover sulfur in a single step. The process is conducted at gasifier pressure and 125 to 160 C. The proposed commercial embodiment of the SSRP involves a liquid phase of molten sulfur with dispersed catalyst in a slurry bubble-column reactor (SBCR).

Apostolos A. Nikolopoulos; Santosh K. Gangwal; William J. McMichael; Jeffrey W. Portzer

2003-01-01T23:59:59.000Z

257

College Students‘ GIS Spatial Concept Knowledge Assessed by Concept Maps  

E-Print Network [OSTI]

course?, 2) What spatial misconceptions students may possess while taking an introductory-level GIS course?, and 3) Which spatial concepts are easy or hard for undergraduate students to understand? The researcher asked twelve participants who were taking...

Oda, Katsuhiko

2012-07-16T23:59:59.000Z

258

Basic concept in plasma diagnostics  

E-Print Network [OSTI]

This paper presents the basic concept of various plasma diagnostics used for the study of plasma characteristics in different plasma experiments ranging from low temperature to high energy density plasma.

Rai, V N

2014-01-01T23:59:59.000Z

259

Modified Acyl-ACP desaturase  

DOE Patents [OSTI]

Disclosed is a method for modifying the chain length and double bond positional specificities of a soluble plant fatty acid desaturase. More specifically, the method involves modifying amino acid contact residues in the substrate binding channel of the soluble fatty acid desaturase which contact the fatty acid. Specifically disclosed is the modification of an acyl-ACP desaturase. Amino acid contact residues which lie within the substrate binding channel are identified, and subsequently replaced with different residues to effect the modification of activity. 2 figs.

Cahoon, E.B.; Shanklin, J.; Lindqvist, Y.; Schneider, G.

1999-03-30T23:59:59.000Z

260

DIRECT LIQUEFACTION PROOF-OF-CONCEPT PROGRAM  

SciTech Connect (OSTI)

This report presents the results of the bench-scale work, Bench Run PB-09, HTI Run Number 227-106, conducted under the DOE Proof-of-Concept Option Program indirect coal liquefaction at Hydrocarbon Technologies Inc. in Lawrenceville, New Jersey. Bench Run PB-09 was conducted using two types of Chinese coal, Shenhua No.2 and Shenhua No.3, and had several goals. One goal was to study the liquefaction performance of Shenhua No.2 and Shenhua No.3 with respect to coal conversion and distillate production. Another goal of Bench Run PB-09 was to study the effect of different GelCatw formulations and loadings. At the same time, the space velocity and the temperature of the fmt reactor, K-1, were varied to optimize the liquefaction of the two Chinese coals. The promoter-modified HTI GelCat{trademark} catalyst was very effective in the direct liquefaction of coal with nearly 92% maf coal conversion with Shenhua No.3 and 93% maf coal conversion with 9 Shenhua No.2. Distillate yields (CQ-524 C)varied from 52-68% maf for Shenhua No.3 coal to 54-63% maf for Shenhua No.2 coal. The primary conclusion from Bench Run PB-09 is that Shenhua No.3 coal is superior to Shenhua No.2 coal in direct liquefaction due to its greater distillate production, although coal conversion is slightly lower and C{sub 1}-C{sub 3} light gas production is higher for Shenhua No.3. The new promoter modified GelCat{trademark} proved successful in converting the two 9 Chinese coals and, under some conditions, producing good distillate yields for a coal-only bench run. Run PB-09 demonstrated significantly better performance of China Shenhua coal using HTI's coal direct liquefaction technology and GelCat{trademark} catalyst than that obtained at China Coal Research Institute (CCRI, coal conversion 88% and distillate yield 61%).

A.G. Comolli; T.L.K. Lee; J. Hu; G. Popper; M.D. Elwell; J. Miller; D. Parfitt; P. Zhou

1999-12-30T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Resonant wave-particle interactions modified by intrinsic Alfvenic turbulence  

SciTech Connect (OSTI)

The concept of wave-particle interactions via resonance is well discussed in plasma physics. This paper shows that intrinsic Alfven waves can qualitatively modify the physics discussed in conventional linear plasma kinetic theories. It turns out that preexisting Alfven waves can affect particle motion along the ambient magnetic field and, moreover, the ensuing force field is periodic in time. As a result, the meaning of the usual Landau and cyclotron resonance conditions becomes questionable. It turns out that this effect leads us to find a new electromagnetic instability. In such a process intrinsic Alfven waves not only modify the unperturbed distribution function but also result in a different type of cyclotron resonance which is affected by the level of turbulence. This instability might enable us to better our understanding of the observed radio emission processes in the solar atmosphere.

Wu, C. S.; Lee, K. H. [Institute of Space Science, National Central University, Zhongli, Taiwan (China); Wang, C. B. [CAS Key Laboratory of Geospace Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei (China); Wu, D. J. [Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing (China)

2012-08-15T23:59:59.000Z

262

Energy Literacy: Essential Principles and Fundamental Concepts...  

Office of Environmental Management (EM)

Energy Literacy: Essential Principles and Fundamental Concepts for Energy Education Energy Literacy: Essential Principles and Fundamental Concepts for Energy Education News and...

263

The Enviro-Port concept  

E-Print Network [OSTI]

and controlled by design in the initial Enviro-Port concept. These five specific types of pollution are oil discharges, hazardous material discharges, industrial wastes, non-point source wastes, and ship wastes. Oil Discharges and Accidenta] Spills According...THE ENVIRO-PORT CONCEPT NILLIAM CARI f)cNL'TT Submitted to the Graduate Col1ege of Texas A8H University in par tial fulfillment of the requirement for the degree of NASTER QF SCI ENCE August 1977 major Subject: Civil Engineering THE ENV IRO...

McNutt, William Carl

1977-01-01T23:59:59.000Z

264

Children's Conceptions of the Brain   

E-Print Network [OSTI]

The present study explored children’s developing conceptions of the brain in order to enhance previous research and to contribute to debates regarding the nature of children’s naďve biological theories. 56 participants aged 5, 7 and 9-years-old were...

McColl, Judith

2012-03-14T23:59:59.000Z

265

Data Mining: Concepts and Techniques  

E-Print Network [OSTI]

1 Data Mining: Concepts and Techniques (3rd ed.) -- Chapter 3 -- Jiawei Han, Micheline Kamber. All rights reserved. #12;2013/08/12 2 #12;33 Chapter 3: Data Preprocessing n Data Preprocessing: An Overview n Data Quality n Major Tasks in Data Preprocessing n Data Cleaning n Data Integration n Data

Geldenhuys, Jaco

266

Data Warehousing and Concepts, Methodologies,  

E-Print Network [OSTI]

, and outcomes of the utilization of data mining and warehousing technologies, such as algorithms, concept of the trademark or registered trademark. British Cataloguing in Publication Data A Cataloguing in Publication approach that allows us to build robust and adaptable web sys- tems by using a multi-agent approach

Camacho, David

267

Progress on DCLL Blanket Concept  

SciTech Connect (OSTI)

Under the US Fusion Nuclear Science and Technology Development program, we have selected the Dual Coolant Lead Lithium concept (DCLL) as a reference blanket, which has the potential to be a high performance DEMO blanket design with a projected thermal efficiency of >40%. Reduced activation ferritic/martensitic (RAF/M) steel is used as the structural material. The self-cooled breeder PbLi is circulated for power conversion and for tritium breeding. A SiC-based flow channel insert (FCI) is used as a means for magnetohydrodynamic pressure drop reduction from the circulating liquid PbLi and as a thermal insulator to separate the high-temperature PbLi (~700°C) from the helium-cooled RAF/M steel structure. We are making progress on related R&D needs to address critical Fusion Nuclear Science and Facility (FNSF) and DEMO blanket development issues. When performing the function as the Interface Coordinator for the DCLL blanket concept, we had been developing the mechanical design and performing neutronics, structural and thermal hydraulics analyses of the DCLL TBM module. We had estimated the necessary ancillary equipment that will be needed at the ITER site and a detailed safety impact report has been prepared. This provided additional understanding of the DCLL blanket concept in preparation for the FNSF and DEMO. This paper will be a summary report on the progress of the DCLL TBM design and R&Ds for the DCLL blanket concept.

Wong, Clement; Abdou, M.; Katoh, Yutai; Kurtz, Richard J.; Lumsdaine, A.; Marriott, Edward P.; Merrill, Brad; Morley, Neil; Pint, Bruce A.; Sawan, M.; Smolentsev, S.; Williams, Brian; Willms, Scott; Youssef, M.

2013-09-01T23:59:59.000Z

268

Observational Tests of Modified Gravity  

E-Print Network [OSTI]

Modified gravity theories have richer observational consequences for large-scale structure than conventional dark energy models, in that different observables are not described by a single growth factor even in the linear regime. We examine the relationships between perturbations in the metric potentials, density and velocity fields, and discuss strategies for measuring them using gravitational lensing, galaxy cluster abundances, galaxy clustering/dynamics and the ISW effect. We show how a broad class of gravity theories can be tested by combining these probes. A robust way to interpret observations is by constraining two key functions: the ratio of the two metric potentials, and the ratio of the Gravitational ``constant'' in the Poisson equation to Newton's constant. We also discuss quasilinear effects that carry signatures of gravity, such as through induced three-point correlations. Clustering of dark energy can mimic features of modified gravity theories and thus confuse the search for distinct signatures of such theories. It can produce pressure perturbations and anisotropic stresses, which breaks the equality between the two metric potentials even in general relativity. With these two extra degrees of freedom, can a clustered dark energy model mimic modified gravity models in all observational tests? We show with specific examples that observational constraints on both the metric potentials and density perturbations can in principle distinguish modifications of gravity from dark energy models. We compare our result with other recent studies that have slightly different assumptions (and apparently contradictory conclusions).

Bhuvnesh Jain; Pengjie Zhang

2007-09-17T23:59:59.000Z

269

Concepts ETI Inc Concepts NREC associated with Oceanlinx | Open Energy  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentratingRenewable Solutions LLC Jump to: navigation,Area (Keith, Et Al.,Conception Wind

270

Transportation System Concept of Operations  

SciTech Connect (OSTI)

The Nuclear Waste Policy Act of 1982 (NWPA), as amended, authorized the DOE to develop and manage a Federal system for the disposal of SNF and HLW. OCRWM was created to manage acceptance and disposal of SNF and HLW in a manner that protects public health, safety, and the environment; enhances national and energy security; and merits public confidence. This responsibility includes managing the transportation of SNF and HLW from origin sites to the Repository for disposal. The Transportation System Concept of Operations is the core high-level OCRWM document written to describe the Transportation System integrated design and present the vision, mission, and goals for Transportation System operations. By defining the functions, processes, and critical interfaces of this system early in the system development phase, programmatic risks are minimized, system costs are contained, and system operations are better managed, safer, and more secure. This document also facilitates discussions and understanding among parties responsible for the design, development, and operation of the Transportation System. Such understanding is important for the timely development of system requirements and identification of system interfaces. Information provided in the Transportation System Concept of Operations includes: the functions and key components of the Transportation System; system component interactions; flows of information within the system; the general operating sequences; and the internal and external factors affecting transportation operations. The Transportation System Concept of Operations reflects OCRWM's overall waste management system policies and mission objectives, and as such provides a description of the preferred state of system operation. The description of general Transportation System operating functions in the Transportation System Concept of Operations is the first step in the OCRWM systems engineering process, establishing the starting point for the lower level descriptions. of subsystems and components, and the Transportation System Requirements Document. Other program and system documents, plans, instructions, and detailed designs will be consistent with and informed by the Transportation System Concept of Operations. The Transportation System Concept of Operations is a living document, enduring throughout the OCRWM systems engineering lifecycle. It will undergo formal approval and controlled revisions as appropriate while the Transportation System matures. Revisions will take into account new policy decisions, new information available through system modeling, engineering investigations, technical analyses and tests, and the introduction of new technologies that can demonstrably improve system performance.

N. Slater-Thompson

2006-08-16T23:59:59.000Z

271

Bistatic SAR: Proof of Concept.  

SciTech Connect (OSTI)

Typical synthetic aperture RADAR (SAR) imaging employs a co-located RADAR transmitter and receiver. Bistatic SAR imaging separates the transmitter and receiver locations. A bistatic SAR configuration allows for the transmitter and receiver(s) to be in a variety of geometric alignments. Sandia National Laboratories (SNL) / New Mexico proposed the deployment of a ground-based RADAR receiver. This RADAR receiver was coupled with the capability of digitizing and recording the signal collected. SNL proposed the possibility of creating an image of targets the illuminating SAR observes. This document describes the developed hardware, software, bistatic SAR configuration, and its deployment to test the concept of a ground-based bistatic SAR. In the proof-of-concept experiments herein, the RADAR transmitter will be a commercial SAR satellite and the RADAR receiver will be deployed at ground level, observing and capturing RADAR ground/targets illuminated by the satellite system.

Yocky, David A.; Doren, Neall E.; Bacon, Terry A.; Wahl, Daniel E.; Eichel, Paul H.; Jakowatz, Charles V,; Delaplain, Gilbert G.; Dubbert, Dale F.; Tise, Bertice L.; White, Kyle R.

2014-10-01T23:59:59.000Z

272

Adhesives from modified soy protein  

DOE Patents [OSTI]

The, present invention provides useful adhesive compositions having similar adhesive properties to conventional UF and PPF resins. The compositions generally include a protein portion and modifying ingredient portion selected from the group consisting of carboxyl-containing compounds, aldehyde-containing compounds, epoxy group-containing compounds, and mixtures thereof. The composition is preferably prepared at a pH level at or near the isoelectric point of the protein. In other preferred forms, the adhesive composition includes a protein portion and a carboxyl-containing group portion.

Sun, Susan (Manhattan, KS); Wang, Donghai (Manhattan, KS); Zhong, Zhikai (Manhattan, KS); Yang, Guang (Shanghai, CN)

2008-08-26T23:59:59.000Z

273

CIRCULATING MOVING BED COMBUSTION PROOF OF CONCEPT  

SciTech Connect (OSTI)

Circulating Moving Bed (CMB) combustion technology has its roots in traditional circulating fluidized bed technology and involves a novel method of solid fuel combustion and heat transfer. CMB technology represents a step change in improved performance and cost relative to conventional PC and FBC boilers. The CMB heat exchanger preheats the energy cycle working fluid, steam or air, to the high temperature levels required in systems for advanced power generation. Unique features of the CMB are the reduction of the heat transfer surfaces by about 60% as a result of the enhanced heat transfer rates, flexibility of operation, and about 30% lower cost over existing technology. The CMB Phase I project ran from July 2001 through March 2003. Its objective was to continue development of the CMB technology with a series of proof of concept tests. The tests were conducted at a scale that provided design data for scale up to a demonstration plant. These objectives were met by conducting a series of experiments in ALSTOM Power’s Multi-use Test Facility (MTF). The MTF was modified to operate under CMB conditions of commercial interest. The objective of the tests were to evaluate gas-to-solids heat transfer in the upper furnace, assess agglomeration in the high temperature CMB bubbling bed, and evaluate solids-to-tube heat transfer in the moving bed heat exchanger. The Phase I program results showed that there are still some significant technical uncertainties that needed to be resolved before the technology can be confidently scaled up for a successful demonstration plant design. Work remained in three primary areas: • scale up of gas to solid heat transfer • high temperature finned surface design • the overall requirements of mechanical and process design. The CMB Phase II workscope built upon the results of Phase I and specifically addressed the remaining technical uncertainties. It included a scaled MTF heat transfer test to provide the necessary data to scale up gas-to-solids heat transfer. A stress test rig was built and tested to provide validation data for a stress model needed to support high temperature finned surface design. Additional cold flow model tests and MTF tests were conducted to address mechanical and process design issues. This information was then used to design and cost a commercial CMB design concept. Finally, the MBHE was reconfigured into a slice arrangement and tested for an extended duration at a commercial CFB plant.

Jukkola, Glen

2010-06-30T23:59:59.000Z

274

Generic repository design concepts and thermal analysis (FY11).  

SciTech Connect (OSTI)

Reference concepts for geologic disposal of used nuclear fuel and high-level radioactive waste in the U.S. are developed, including geologic settings and engineered barriers. Repository thermal analysis is demonstrated for a range of waste types from projected future, advanced nuclear fuel cycles. The results show significant differences among geologic media considered (clay/shale, crystalline rock, salt), and also that waste package size and waste loading must be limited to meet targeted maximum temperature values. In this study, the UFD R&D Campaign has developed a set of reference geologic disposal concepts for a range of waste types that could potentially be generated in advanced nuclear FCs. A disposal concept consists of three components: waste inventory, geologic setting, and concept of operations. Mature repository concepts have been developed in other countries for disposal of spent LWR fuel and HLW from reprocessing UNF, and these serve as starting points for developing this set. Additional design details and EBS concepts will be considered as the reference disposal concepts evolve. The waste inventory considered in this study includes: (1) direct disposal of SNF from the LWR fleet, including Gen III+ advanced LWRs being developed through the Nuclear Power 2010 Program, operating in a once-through cycle; (2) waste generated from reprocessing of LWR UOX UNF to recover U and Pu, and subsequent direct disposal of used Pu-MOX fuel (also used in LWRs) in a modified-open cycle; and (3) waste generated by continuous recycling of metal fuel from fast reactors operating in a TRU burner configuration, with additional TRU material input supplied from reprocessing of LWR UOX fuel. The geologic setting provides the natural barriers, and establishes the boundary conditions for performance of engineered barriers. The composition and physical properties of the host medium dictate design and construction approaches, and determine hydrologic and thermal responses of the disposal system. Clay/shale, salt, and crystalline rock media are selected as the basis for reference mined geologic disposal concepts in this study, consistent with advanced international repository programs, and previous investigations in the U.S. The U.S. pursued deep geologic disposal programs in crystalline rock, shale, salt, and volcanic rock in the years leading up to the Nuclear Waste Policy Act, or NWPA (Rechard et al. 2011). The 1987 NWPA amendment act focused the U.S. program on unsaturated, volcanic rock at the Yucca Mountain site, culminating in the 2008 license application. Additional work on unsaturated, crystalline rock settings (e.g., volcanic tuff) is not required to support this generic study. Reference disposal concepts are selected for the media listed above and for deep borehole disposal, drawing from recent work in the U.S. and internationally. The main features of the repository concepts are discussed in Section 4.5 and summarized in Table ES-1. Temperature histories at the waste package surface and a specified distance into the host rock are calculated for combinations of waste types and reference disposal concepts, specifying waste package emplacement modes. Target maximum waste package surface temperatures are identified, enabling a sensitivity study to inform the tradeoff between the quantity of waste per disposal package, and decay storage duration, with respect to peak temperature at the waste package surface. For surface storage duration on the order of 100 years or less, waste package sizes for direct disposal of SNF are effectively limited to 4-PWR configurations (or equivalent size and output). Thermal results are summarized, along with recommendations for follow-on work including adding additional reference concepts, verification and uncertainty analysis for thermal calculations, developing descriptions of surface facilities and other system details, and cost estimation to support system-level evaluations.

Howard, Robert (Oak Ridge National Laboratory, Oak Ridge, TN); Dupont, Mark (Savannah River Nuclear Solutions, Aiken, SC); Blink, James A. (Lawrence Livermore National Laboratory, Livermore, CA); Fratoni, Massimiliano (Lawrence Livermore National Laboratory, Livermore, CA); Greenberg, Harris (Lawrence Livermore National Laboratory, Livermore, CA); Carter, Joe (Savannah River Nuclear Solutions, Aiken, SC); Hardin, Ernest L.; Sutton, Mark A. (Lawrence Livermore National Laboratory, Livermore, CA)

2011-08-01T23:59:59.000Z

275

Advanced fusion concepts: project summaries  

SciTech Connect (OSTI)

This report contains descriptions of the activities of all the projects supported by the Advanced Fusion Concepts Branch of the Office of Fusion Energy, US Department of Energy. These descriptions are project summaries of each of the individual projects, and contain the following: title, principle investigators, funding levels, purpose, approach, progress, plans, milestones, graduate students, graduates, other professional staff, and recent publications. Information is given for each of the following programs: (1) reverse-field pinch, (2) compact toroid, (3) alternate fuel/multipoles, (4) stellarator/torsatron, (5) linear magnetic fusion, (6) liners, and (7) Tormac. (MOW)

None

1980-12-01T23:59:59.000Z

276

Tangled Web of Concept Relations. Concept relations for ISO 1087-1 and ISO 704  

E-Print Network [OSTI]

Tangled Web of Concept Relations. Concept relations for ISO 1087-1 and ISO 704 Anita Nuopponen on ISO 704:2009 Terminology work - Principles and methods and ISO 1087-1:2000 Terminology work: concept relation, conceptual relation, concept system, generic rela- tion, associative relation, ISO 1087

Paris-Sud XI, Université de

277

A GLOBALLY CONVERGENT MODIFIED CONJUGATE-GRADIENT ...  

E-Print Network [OSTI]

based upon applying modified variants of either PCG or Lanczos method to the sys- ... conjugate-gradient based strategies for optimizing a constrained ...

2009-10-01T23:59:59.000Z

278

ADVANCED DIRECT LIQUEFACTION CONCEPTS FOR PETC GENERIC UNITS  

SciTech Connect (OSTI)

The results of Laboratory and Bench-Scale experiments and supporting technical and economic assessments conducted under DOE Contract No. DE-AC22-91PC91040 is reported for the period July 1, 1998 to September 30, 1998. This contract is with the University of kentucky Research Foundation, which supports work with the University of Kentucky Center for Applied Energy Researc, CONSOL, Inc., LDP Associates, and Hydrocarbon Technologies, Inc. This work involves the introduction into the basic two-stage liquefaction process several novel concepts, which include dispersed lower-cost catalysts, coal cleaning by oil agglomeration, and distillate hydrotreating and dewaxing. This project has been modified to include an investigation into the production of value added materials from coal using liquefaction based technologies.

Adam J. Berkovich

2000-02-01T23:59:59.000Z

279

Drip Shield Emplacement Gantry Concept  

SciTech Connect (OSTI)

This design analysis has shown that, on a conceptual level, the emplacement of drip shields is feasible with current technology and equipment. A plan for drip shield emplacement was presented using a Drip Shield Transporter, a Drip Shield Emplacement Gantry, a locomotive, and a Drip Shield Gantry Carrier. The use of a Drip Shield Emplacement Gantry as an emplacement concept results in a system that is simple, reliable, and interfaces with the numerous other exising repository systems. Using the Waste Emplacement/Retrieval System design as a basis for the drip shield emplacement concept proved to simplify the system by using existing equipment, such as the gantry carrier, locomotive, Electrical and Control systems, and many other systems, structures, and components. Restricted working envelopes for the Drip Shield Emplacement System require further consideration and must be addressed to show that the emplacement operations can be performed as the repository design evolves. Section 6.1 describes how the Drip Shield Emplacement System may use existing equipment. Depending on the length of time between the conclusion of waste emplacement and the commencement of drip shield emplacement, this equipment could include the locomotives, the gantry carrier, and the electrical, control, and rail systems. If the exisiting equipment is selected for use in the Drip Shield Emplacement System, then the length of time after the final stages of waste emplacement and start of drip shield emplacement may pose a concern for the life cycle of the system (e.g., reliability, maintainability, availability, etc.). Further investigation should be performed to consider the use of existing equipment for drip shield emplacement operations. Further investigation will also be needed regarding the interfaces and heat transfer and thermal effects aspects. The conceptual design also requires further design development. Although the findings of this analysis are accurate for the assumptions made, further refinements of this analysis are needed as the project parameters change. The designs of the drip shield, the Emplacement Drift, and the other drip shield emplacement equipment all have a direct effect on the overall design feasibility.

Silva, R.A.; Cron, J.

2000-03-29T23:59:59.000Z

280

CERTS Microgrid Laboratory Test Bed  

E-Print Network [OSTI]

could experience voltage and/or reactive power oscillations.could experience voltage and/or reactive power oscillations.

Lasseter, R. H.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

CERTS Microgrid Laboratory Test Bed  

E-Print Network [OSTI]

utility, allowing for demand-side management arrangements.resource planning, demand-side management, and building

Lasseter, R. H.

2010-01-01T23:59:59.000Z

282

CERTS Microgrid Laboratory Test Bed  

E-Print Network [OSTI]

integration. In combined-heat-and-power applications, thetested three combined-heat- and-power units to incorporate

Eto, Joe

2009-01-01T23:59:59.000Z

283

CERTS Microgrid Laboratory Test Bed  

E-Print Network [OSTI]

integration. In combined-heat-and-power applications, thetested three combined-heat- and-power units to incorporate

ETO, J.

2010-01-01T23:59:59.000Z

284

Microgrid Activities | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGYWomen OwnedofDepartment ofJared Temanson -ofMarc MorialMegan SlackDr.Federal programs,

285

Advanced Combustion Concepts - Enabling Systems and Solutions...  

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

engine * Integration of proposed air path and HCCI combustion control strategies into ECU software * Prototype level 2 updates and proof of combustion concept for vehicle readiness...

286

Mapping the neural architecture of concepts.  

E-Print Network [OSTI]

??How are concepts represented in the brain? When we hear the ringing of a bell, or watch a bell swinging back and forth, is there… (more)

Man, Kingson

2015-01-01T23:59:59.000Z

287

Concepts and Applications of Stochastically Weighted Stochastic ...  

E-Print Network [OSTI]

Apr 8, 2011 ... Page 2 ... for comprehensive treatments of the topic). The concept of stochastic dominance can be framed in terms of utility theory (von ...

2011-04-08T23:59:59.000Z

288

Advanced Combustion Concepts - Enabling Systems and Solutions...  

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

Evaluation Meeting ace066yilmaz2013o.pdf More Documents & Publications Advanced Combustion Concepts - Enabling Systems and Solutions (ACCESS) for High Efficiency Light Duty...

289

Nanoparticles modified with multiple organic acids  

DOE Patents [OSTI]

Surface-modified nanoparticles of boehmite, and methods for preparing the same. Aluminum oxyhydroxide nanoparticles are surface modified by reaction with selected amounts of organic acids. In particular, the nanoparticle surface is modified by reactions with two or more different carboxylic acids, at least one of which is an organic carboxylic acid. The product is a surface modified boehmite nanoparticle that has an inorganic aluminum oxyhydroxide core, or part aluminum oxyhydroxide core and a surface-bonded organic shell. Organic carboxylic acids of this invention contain at least one carboxylic acid group and one carbon-hydrogen bond. One embodiment of this invention provides boehmite nanoparticles that have been surface modified with two or more acids one of which additional carries at least one reactive functional group. Another embodiment of this invention provides boehmite nanoparticles that have been surface modified with multiple acids one of which has molecular weight or average molecular weight greater than or equal to 500 Daltons. Yet, another embodiment of this invention provides boehmite nanoparticles that are surface modified with two or more acids one of which is hydrophobic in nature and has solubility in water of less than 15 by weight. The products of the methods of this invention have specific useful properties when used in mixture with liquids, as filler in solids, or as stand-alone entities.

Cook, Ronald Lee (Lakewood, CO); Luebben, Silvia DeVito (Golden, CO); Myers, Andrew William (Arvada, CO); Smith, Bryan Matthew (Boulder, CO); Elliott, Brian John (Superior, CO); Kreutzer, Cory (Brighton, CO); Wilson, Carolina (Arvada, CO); Meiser, Manfred (Aurora, CO)

2007-07-17T23:59:59.000Z

290

Review Of Rheology Modifiers For Hanford Waste  

SciTech Connect (OSTI)

As part of Savannah River National Laboratory (SRNL)'s strategic development scope for the Department of Energy - Office of River Protection (DOE-ORP) Hanford Tank Waste Treatment and Immobilization Plant (WTP) waste feed acceptance and product qualification scope, the SRNL has been requested to recommend candidate rheology modifiers to be evaluated to adjust slurry properties in the Hanford Tank Farm. SRNL has performed extensive testing of rheology modifiers for use with Defense Waste Processing Facility (DWPF) simulated melter feed - a high undissolved solids (UDS) mixture of simulated Savannah River Site (SRS) Tank Farm sludge, nitric and formic acids, and glass frit. A much smaller set of evaluations with Hanford simulated waste have also been completed. This report summarizes past work and recommends modifiers for further evaluation with Hanford simulated wastes followed by verification with actual waste samples. Based on the review of available data, a few compounds/systems appear to hold the most promise. For all types of evaluated simulated wastes (caustic Handford tank waste and DWPF processing samples with pH ranging from slightly acidic to slightly caustic), polyacrylic acid had positive impacts on rheology. Citric acid also showed improvement in yield stress on a wide variety of samples. It is recommended that both polyacrylic acid and citric acid be further evaluated as rheology modifiers for Hanford waste. These materials are weak organic acids with the following potential issues: The acidic nature of the modifiers may impact waste pH, if added in very large doses. If pH is significantly reduced by the modifier addition, dissolution of UDS and increased corrosion of tanks, piping, pumps, and other process equipment could occur. Smaller shifts in pH could reduce aluminum solubility, which would be expected to increase the yield stress of the sludge. Therefore, it is expected that use of an acidic modifier would be limited to concentrations that do not appreciably change the pH of the waste; Organics are typically reductants and could impact glass REDOX if not accounted for in the reductant addition calculations; Stability of the modifiers in a caustic, radioactive environment is not known, but some of the modifiers tested were specifically designed to withstand caustic conditions; These acids will add to the total organic carbon content of the wastes. Radiolytic decomposition of the acids could result in organic and hydrogen gas generation. These potential impacts must be addressed in future studies with simulants representative of real waste and finally with tests using actual waste based on the rheology differences seen between SRS simulants and actual waste. The only non-organic modifier evaluated was sodium metasilicate. Further evaluation of this modifier is recommended if a reducing modifier is a concern.

Pareizs, J. M.

2013-09-30T23:59:59.000Z

291

Chapter 4. Multiple Choice Concept Tests: The Force Concept Inventory (FCI)  

E-Print Network [OSTI]

102 Chapter 4. Multiple Choice Concept Tests: The Force Concept Inventory (FCI) I. CHAPTER OVERVIEW Inventory (FCI).6 Because the questions are written in plain language and easily understood by non

Maryland at College Park, University of

292

Keep new concepts Check cognition level  

E-Print Network [OSTI]

point "cold" topic "hot" topicTop HealthScience Nuclear Energy Safety& Accidents Concepts at time point· Keep new concepts · Check cognition level = number of news {Japan, nuclear, disaster · Multilingual Wikipedia history analysis Japan footballteam national nuclear disaster Set of candidates per time

Chaudhuri, Surajit

293

Database System Concepts Silberschatz, Korth and Sudarshan  

E-Print Network [OSTI]

Database System Concepts ©Silberschatz, Korth and Sudarshan See www.db-book.com for conditions on re-use ©Silberschatz, Korth and SudarshanDatabase System Concepts Chapter 8: Application Design andChapter 8: Application Design and DevelopmentDevelopment #12;©Silberschatz, Korth and Sudarshan8.2Database

Dragan, Feodor F.

294

Compatibilizer for crumb rubber modified asphalt  

SciTech Connect (OSTI)

The United States of America discards more than 300 million tires each year, and out of that a large fraction of the tires is dumped into stock piles. This large quantity of tires creates an environmental problem. The use of scrap tires is limited. There is a usage potential in such fields as fuel for combustion and Crumb Rubber-Modified Asphalt binder (CRMA). The use of crumb rubber in modifying asphalt is not a new technique; it is been used since early 1960 by pavement engineers. Crumb rubber is a composite of different blends of natural and synthetic rubber (natural rubber, processing oils, polybutadiene, polystyrene butadiene, and filler). Prior research had concluded that the performance of crumb rubber modified asphalt is asphalt dependent. In some cases it improves the Theological properties and in some cases it degrades the properties of modified asphalt.

Labib, M.E. [New Jersey Institute of Technology, Newark, NJ (United States); Memon, G.M.; Chollar, B.H. [Federal Highway Administration, McLean, VA (United States)

1996-12-31T23:59:59.000Z

295

Test particle motion in modified gravity theories  

E-Print Network [OSTI]

We derive the equations of motion of an electrically neutral test particle for modified gravity theories in which the covariant divergence of the ordinary matter energy-momentum tensor dose not vanish (i.e. $\

Mahmood Roshan

2013-02-05T23:59:59.000Z

296

DNA polymerase having modified nucleotide binding site for DNA sequencing  

DOE Patents [OSTI]

A modified gene encoding a modified DNA polymerase is disclosed. The modified polymerase incorporates dideoxynucleotides at least 20-fold better compared to the corresponding deoxynucleotides as compared with the corresponding naturally-occurring DNA polymerase. 6 figs.

Tabor, S.; Richardson, C.

1997-03-25T23:59:59.000Z

297

Screening analysis of solar thermochemical hydrogen concepts.  

SciTech Connect (OSTI)

A screening analysis was performed to identify concentrating solar power (CSP) concepts that produce hydrogen with the highest efficiency. Several CSP concepts were identified that have the potential to be much more efficient than today's low-temperature electrolysis technology. They combine a central receiver or dish with either a thermochemical cycle or high-temperature electrolyzer that operate at temperatures >600 C. The solar-to-hydrogen efficiencies of the best central receiver concepts exceed 20%, significantly better than the 14% value predicted for low-temperature electrolysis.

Diver, Richard B., Jr.; Kolb, Gregory J.

2008-03-01T23:59:59.000Z

298

Separation of Peptide Isomers with Variant Modified Sites by...  

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

Isomers with Variant Modified Sites by High-Resolution Differential Ion Mobility Spectrometry. Separation of Peptide Isomers with Variant Modified Sites by High-Resolution...

299

Glucose oxidase-graphene-chitosan modified electrode for direct...  

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

oxidase-graphene-chitosan modified electrode for direct electrochemistry and glucose sensing. Glucose oxidase-graphene-chitosan modified electrode for direct electrochemistry and...

300

Disposable Carbon Nanotube Modified Screen-Printed Biosensor...  

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

Carbon Nanotube Modified Screen-Printed Biosensor for Amperometric Detection of Organophosphorus Pesticides and Nerve Disposable Carbon Nanotube Modified Screen-Printed Biosensor...

Note: This page contains sample records for the topic "modified microgrid concept" 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

Cornucopia: The Concept of Digital Gastronomy  

E-Print Network [OSTI]

The authors present a new concept of digital gastronomy—Cornucopia, a futuristic cooking methodology based on digital technologies. They discuss how they have merged kitchen tools with science fiction and actual technologies ...

Zoran, Amit Shlomo

302

The concept of a sustainable agriculture  

E-Print Network [OSTI]

is one that does not entail conflicting propositions, particularly propositions which are contradictory. But beyond logical consistency, we also do not want to espouse a concept of sustainability that allows policy to claim corn-legume rotation...

Kriewaldt, David Mark

1993-01-01T23:59:59.000Z

303

Tarski's Conception of Logic1 Solomon Feferman  

E-Print Network [OSTI]

1 Tarski's Conception of Logic1 Solomon Feferman In its widest scope, Tarski thought the aims program in Logic and Methodology. In his letter to the dean urging its creation, Tarski was already able

Feferman, Solomon

304

"Amartya Sen's Misleading Conception of Utilitarianism"  

E-Print Network [OSTI]

Amartya Sen’s misleading conception of utilitarianismParis, France) Abstract : Amartya Sen has become one of theSen 1979, p. 367). Amartya Sen thus first presented his

Benicourt, Emmanuelle

2008-01-01T23:59:59.000Z

305

Advanced Combustion Concepts - Enabling Systems and Solutions...  

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

concepts. * Target Multi Mode Combustion Engine is based on the GM Ecotec 2.0 L DI Turbo platform * Base Engine HW design, improvements for target engine configuration and...

306

Best Practices for Administering Concept Inventories  

E-Print Network [OSTI]

There are a plethora of concept inventories in physics available for faculty to use, but it is not always clear exactly why you would use these tests, or how you should administer them and interpret the results. These multiple-choice research-based tests about physics concepts are valuable because they allow for standardized comparisons among institutions, instructors, or over time. In order for these comparisons to be meaningful, you should use best practices for administering the tests. Here we discuss best practices for administering concept inventories including background on these types of tests and specifics of how to give them online or in-class. We also discuss advantages and disadvantages of different incentives you could give your students, interpretation of scores and common concerns you may have about using concept inventories.

Madsen, Adrian; Sayre, Eleanor C

2014-01-01T23:59:59.000Z

307

Advanced Combustion Concepts - Enabling Systems and Solutions...  

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

advanced control concepts and enabling system to manage multi-modemulti-fuel combustion events and achieve an up to 30 percent fuel economy improvement deer11yilmaz.pdf...

308

SLUDGE TREATMENT PROJECT COST COMPARISON BETWEEN HYDRAULIC LOADING AND SMALL CANISTER LOADING CONCEPTS  

SciTech Connect (OSTI)

The Sludge Treatment Project (STP) is considering two different concepts for the retrieval, loading, transport and interim storage of the K Basin sludge. The two design concepts under consideration are: (1) Hydraulic Loading Concept - In the hydraulic loading concept, the sludge is retrieved from the Engineered Containers directly into the Sludge Transport and Storage Container (STSC) while located in the STS cask in the modified KW Basin Annex. The sludge is loaded via a series of transfer, settle, decant, and filtration return steps until the STSC sludge transportation limits are met. The STSC is then transported to T Plant and placed in storage arrays in the T Plant canyon cells for interim storage. (2) Small Canister Concept - In the small canister concept, the sludge is transferred from the Engineered Containers (ECs) into a settling vessel. After settling and decanting, the sludge is loaded underwater into small canisters. The small canisters are then transferred to the existing Fuel Transport System (FTS) where they are loaded underwater into the FTS Shielded Transfer Cask (STC). The STC is raised from the basin and placed into the Cask Transfer Overpack (CTO), loaded onto the trailer in the KW Basin Annex for transport to T Plant. At T Plant, the CTO is removed from the transport trailer and placed on the canyon deck. The CTO and STC are opened and the small canisters are removed using the canyon crane and placed into an STSC. The STSC is closed, and placed in storage arrays in the T Plant canyon cells for interim storage. The purpose of the cost estimate is to provide a comparison of the two concepts described.

GEUTHER J; CONRAD EA; RHOADARMER D

2009-08-24T23:59:59.000Z

309

Plants having modified response to ethylene  

DOE Patents [OSTI]

The invention includes transformed plants having at least one cell transformed with a modified ETR nucleic acid. Such plants have a phenotype characterized by a decrease in the response of at least one transformed plant cell to ethylene as compared to a plant not containing the transformed plant cell. Tissue and/or temporal specificity for expression of the modified ETR nucleic acid is controlled by selecting appropriate expression regulation sequences to target the location and/or time of expression of the transformed nucleic acid. The plants are made by transforming at least one plant cell with an appropriate modified ETR nucleic acid, regenerating plants from one or more of the transformed plant cells and selecting at least one plant having the desired phenotype. 67 figs.

Meyerowitz, E.M.; Chang, C.; Bleecker, A.B.

1998-10-20T23:59:59.000Z

310

Electrochemical apparatus comprising modified disposable rectangular cuvette  

DOE Patents [OSTI]

Electrochemical apparatus includes a disposable rectangular cuvette modified with at least one hole through a side and/or the bottom. Apparatus may include more than one cuvette, which in practice is a disposable rectangular glass or plastic cuvette modified by drilling the hole(s) through. The apparatus include two plates and some means of fastening one plate to the other. The apparatus may be interfaced with a fiber optic or microscope objective, and a spectrometer for spectroscopic studies. The apparatus are suitable for a variety of electrochemical experiments, including surface electrochemistry, bulk electrolysis, and flow cell experiments.

Dattelbaum, Andrew M; Gupta, Gautam; Morris, David E

2013-09-10T23:59:59.000Z

311

Modified discrete random walk with absorption  

E-Print Network [OSTI]

We obtain expected number of arrivals, probability of arrival, absorption probabilities and expected time before absorption for a modified discrete random walk on the (sub)set of integers. In a [pqrs] random walk the particle can move one step forward or backward, stay for a moment in the same state or it can be absorbed immediately in the current state. M[pqrs] is a modified version, where probabilities on both sides of a multiple function barrier M are of different [pqrs] type.

Theo van Uem

2009-03-02T23:59:59.000Z

312

Radar Testbed Characterization for Evaluation of Modulated Scatterer Concepts  

E-Print Network [OSTI]

The following research explores the concepts of communication-embedded radar with an emphasis on radar operation and modulated scatterer concepts. Once firmly established the concept of communication via radar backscatter ...

Casper, Matt

2010-05-27T23:59:59.000Z

313

Sustainable Energy Concepts: A Sustainable energy concept for Safari Resort Beekse Bergen:.  

E-Print Network [OSTI]

??Research to sustainable energy concepts with a holiday resort as case study. Near the safaripark a new holiday resort will be built. The missing natrual… (more)

Vons, G.J.

2011-01-01T23:59:59.000Z

314

Organic electroanalysis with chemically modified electrodes  

SciTech Connect (OSTI)

The analytical utility of electrodes modified with functionalized polymer films for the determination of aromatic amines is demonstrated. The analysis is based on the preconcentration of the protonated amines into a functionalized polymer film that contains styrene sulfonate groups. Good sensitivity and high reproducibility were obtained for concentrations down to 10/sup -5/ M. Aliphatic amines do not interfere in the determination.

Guadalupe, A.R.; Abruna, H.D.

1986-01-01T23:59:59.000Z

315

Cosmological Acceleration: Dark Energy or Modified Gravity?  

E-Print Network [OSTI]

We review the evidence for recently accelerating cosmological expansion or "dark energy", either a negative pressure constituent in General Relativity (Dark Energy) or modified gravity (Dark Gravity), without any Dark Energy constituent. If constituent Dark Energy does not exist, so that our universe is now dominated by pressure-free matter, Einstein gravity must be modified at low curvature. The vacuum symmetry of any Robertson-Walker universe then characterizes Dark Gravity as low- or high-curvature modifications of Einstein gravity. The dynamics of either kind of "dark energy" cannot be derived from the homogeneous expansion alone, but requires also observing the growth of inhomogeneities. Present and projected observations are all consistent with a small fine tuned cosmological constant, with nearly static Dark Energy, or with gravity modified at cosmological scales. The growth of cosmological fluctuations will potentially distinguish static "dark energy" from dynamic "dark energy" with equation of state $w(z)$ either changing rapidly or tracking the background matter. But to cosmologically distinguish $\\Lambda$CDM from modified gravity will require a weak lensing shear survey more ambitious than any now projected. Dvali-Gabadadze-Porrati modifications of Einstein gravity may also be detected in refined bservations in the solar system or at the intermediate Vainstein scale. Dark Energy's epicyclic character, failure to explain the original Cosmic Coincidence ("Why now?") without fine tuning, inaccessibility to laboratory or solar system tests, along with braneworld theories, now motivate future precision solar system, Vainstein-scale and cosmological-scale studies of Dark Gravity.

Sidney Bludman

2006-06-12T23:59:59.000Z

316

A New Model of Nonlocal Modified Gravity  

E-Print Network [OSTI]

We consider a new modified gravity model with nonlocal term of the form $R^{-1} \\mathcal{F}(\\Box) R. $ This kind of nonlocality is motivated by investigation of applicability of a few unusual ans\\"atze to obtain some exact cosmological solutions. In particular, we find attractive and useful quadratic ansatz $\\Box R = q R^{2}.$

Ivan Dimitrijevic; Branko Dragovich; Jelena Grujic; Zoran Rakic

2014-11-18T23:59:59.000Z

317

Modified 2/11/2003 PATENT CERTIFICATION  

E-Print Network [OSTI]

DOE/ORO Modified 2/11/2003 PATENT CERTIFICATION Interim Certification Subcontractor Final and disclosing subject inventions as required by the patent clause of the subcontract have been followed. The completion date of this Subcontract is as follows: . The following period is covered by this patent

Pennycook, Steve

318

Tribal Renewable Energy Advanced Course: Project Financing Concepts...  

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

Concepts Tribal Renewable Energy Advanced Course: Project Financing Concepts Watch the DOE Office of Indian Energy's advanced renewable energy course entitled "Tribal Renewable...

319

Improved Engine Design Concepts Using the Second Law of Thermodynamics...  

Energy Savers [EERE]

Improved Engine Design Concepts Using the Second Law of Thermodynamics Improved Engine Design Concepts Using the Second Law of Thermodynamics Presentation from the U.S. DOE Office...

320

Unified Resolve 2014: A Proof of Concept for Radiological Support...  

Office of Environmental Management (EM)

Unified Resolve 2014: A Proof of Concept for Radiological Support to Incident Commanders Unified Resolve 2014: A Proof of Concept for Radiological Support to Incident Commanders...

Note: This page contains sample records for the topic "modified microgrid concept" 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

Evaluation of Generic EBS Design Concepts and Process Models...  

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

Generic EBS Design Concepts and Process Models Implications to EBS Design Optimization Evaluation of Generic EBS Design Concepts and Process Models Implications to EBS Design...

322

Introduction to DMFCs - Advanced Materials and Concepts for Portable...  

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

DMFCs - Advanced Materials and Concepts for Portable Power Fuel Cells Introduction to DMFCs - Advanced Materials and Concepts for Portable Power Fuel Cells Presentation by Piotr...

323

The system architecting process for a solar power satellite concept.  

E-Print Network [OSTI]

??This thesis discusses the system architecting process for a Solar Power Satellite (SPS) concept.The heuristic approach allows a spectrum of concepts to be narrowed to… (more)

Bidwell, Joseph Grady

2006-01-01T23:59:59.000Z

324

Integrated international safeguards concepts for fuel reprocessing  

SciTech Connect (OSTI)

This report is the fourth in a series of efforts by the Los Alamos National Laboratory and Sandia National Laboratories, Albuquerque, to identify problems and propose solutions for international safeguarding of light-water reactor spent-fuel reprocessing plants. Problem areas for international safeguards were identified in a previous Problem Statement (LA-7551-MS/SAND79-0108). Accounting concepts that could be verified internationally were presented in a subsequent study (LA-8042). Concepts for containment/surveillance were presented, conceptual designs were developed, and the effectiveness of these designs was evaluated in a companion study (SAND80-0160). The report discusses the coordination of nuclear materials accounting and containment/surveillance concepts in an effort to define an effective integrated safeguards system. The Allied-General Nuclear Services fuels reprocessing plant at Barnwell, South Carolina, was used as the reference facility.

Hakkila, E.A.; Gutmacher, R.G.; Markin, J.T.; Shipley, J.P.; Whitty, W.J.; Camp, A.L.; Cameron, C.P.; Bleck, M.E.; Ellwein, L.B.

1981-12-01T23:59:59.000Z

325

Experimental Analysis of Soaker Hose Concept for First Wall/Divertor Application  

SciTech Connect (OSTI)

To analyze the effectiveness of the soaker hose concept experimentally, three cases of experiments; vertical, horizontal, and inclined, were conducted. The results have clearly shown that the Lorentz force acts on the liquid metal when current is applied perpendicularly to the magnetic field as seen in the previous numerical analysis. Specifically, the MHD Lorentz force has redirected the flow, modified the shape of the flow surface, and retarded the inlet flow. In particular, the effect of the Lorentz force is pronounced in the horizontal setting. In any settings, however, the surface tension and surface wetting play a significant role in determining flow characteristics. These are challenging problems that need to be resolved in order to put forward this concept for practical application.

Morikawa, Tomotaka; Ying, Alice; Burris, Jonathan; Abdou, Mohamed [Fusion Engineering Sciences Laboratory, University of California, Los Angeles (United States)

2005-04-15T23:59:59.000Z

326

The Path to Fusion Energy for Concepts Currently at the Concept Exploration Level  

E-Print Network [OSTI]

confinement concepts · Spheromak · FRC Concepts operating in a very different parameter space · Magnetized") · Electrostatic confinement · Others #12;EBH 1/13/03 Development plan for toroidal confinement ­ spheromak Status of spheromaks This wide range of reactor visions offers opportunities for a better reactor, but the development

327

Hydrogen Storage Workshop Advanced Concepts Working Group  

E-Print Network [OSTI]

/ Current Status · Aerogels are the scaffold; template with organic functional groups; physisorption, acid benign ­ Inexpensive #12;Self-Assembled Nanocomposites ­ R&D Needs 1. Studying silica aerogels 2. Modifying aerogels 3. Theoretical Modeling - various chemical structures / materials 4. Functionalization

328

A new sensor concept for simultaneous measurement of pressure, temperature and thickness of plate structures using modified wave propagation theory  

E-Print Network [OSTI]

-Acousto Photonic Non-Destructive Evaluation (TAP-NDE) is employed to remotely initiate and acquire interrogating ultrasonic waves. Parameters including pressure, temperature and plate thickness are determined through exploring the dispersion features...

Lo, Tzu-Wei

2005-11-01T23:59:59.000Z

329

New Concepts in Wind Power Forecasting Models  

E-Print Network [OSTI]

New Concepts in Wind Power Forecasting Models Vladimiro Miranda, Ricardo Bessa, JoĂŁo Gama, Guenter to the training of mappers such as neural networks to perform wind power prediction as a function of wind for more accurate short term wind power forecasting models has led to solid and impressive development

Kemner, Ken

330

The scientific model concept and realism  

E-Print Network [OSTI]

The goal of this thesis is two-fold. First, while the model concept frequently is mentioned in the philosophical literature on scientific knowledge, it rarely is addressed as a focus for methodology. My aim is to support the view that models...

Gould, Deke Cainas

2003-01-01T23:59:59.000Z

331

CONCEPTS FOR TEACHING OPTOELECTRONIC CIRCUITS AND SYSTEMS  

E-Print Network [OSTI]

CONCEPTS FOR TEACHING OPTOELECTRONIC CIRCUITS AND SYSTEMS Smail TEDJINI, Benoit PANNETIER, Laurent.Lastname@esisar.inpg.fr Keywords : Optoelectronic devices, optical signals, communication systems, modeling, simulation, CAD and design of optical communication and optoelectronic systems is now necessary for the engineers

Boyer, Edmond

332

Emerging Concepts of Pharmaceutical Research Funding  

E-Print Network [OSTI]

and the pharmaceutical industry to foster development of products that are highly beneficial for a larger partEmerging Concepts of Pharmaceutical Research Funding For a More Sustainable Society March 18th 2014 drawback is the lack of motivation to develop products targeted towards regions outside industrialized

Moeller, Ralf

333

Novel Stack Concepts: Patterned Aligned Carbon Nanotubes  

E-Print Network [OSTI]

Novel Stack Concepts: Patterned Aligned Carbon Nanotubes as Electrodes in MEAs Di-Jia Liu proprietary or confidential information #12;Objective To develop a novel aligned carbon nanotube (ACNT/mass transport and thermal conductivity through patterned nanotubes with micrometer-dimension flowfield

334

Utility Ontology Development with Formal Concept Analysis  

E-Print Network [OSTI]

Utility Ontology Development with Formal Concept Analysis Gaihua Fu and Anthony G Cohn School for the development of ontologies in the utility infrastructure domain. It arises from a practical industrial problem consideration of interoperability with other utility information systems. The proposed approach is based

Leeds, University of

335

State and Transition Modeling History & Current Concepts  

E-Print Network [OSTI]

management input · Friedel(1991) concentrated on thresholds ­ "...compatible with state and transition theoryState and Transition Modeling History & Current Concepts Tamzen K. Stringham Oregon State vegetation change #12;· Non-equilibrium Models (States, Transitions and Thresholds) ­ Encompass Range

336

The exploration of concepts for projectile toys  

E-Print Network [OSTI]

(cont.) The second concept, eDarts, involved incorporating a capacitor powered micro-circuit and LED into foam darts similar to those used in the current line of Nerf® products. The eDarts created a tracer shot or laser ...

Kudrowitz, Barry M

2006-01-01T23:59:59.000Z

337

Anomalous diffusion modifies solar neutrino fluxes  

E-Print Network [OSTI]

Density and temperature conditions in the solar core suggest that the microscopic diffusion of electrons and ions could be nonstandard: diffusion and friction coefficients are energy dependent, collisions are not two-body processes and retain memory beyond the single scattering event. A direct consequence of nonstandard diffusion is that the equilibrium energy distribution of particles departs from the Maxwellian one (tails goes to zero more slowly or faster than exponentially) modifying the reaction rates. This effect is qualitatively different from temperature and/or composition modification: small changes in the number of particles in the distribution tails can strongly modify the rates without affecting bulk properties, such as the sound speed or hydrostatic equilibrium, which depend on the mean values from the distribution. This mechanism can considerably increase the range of predictions for the neutrino fluxes allowed by the current experimental values (cross sections and solar properties) and can be u...

Kaniadakis, G; Lissia, M; Quarati, P

1998-01-01T23:59:59.000Z

338

A modified variational approach to scattering  

E-Print Network [OSTI]

Subject: Physics A MODIFIED VARIATIOiNAL APPROACH TO SCATTERING A Thesis by GREGORY ELLIOTT PARNELL Approved as to sty1 e and content by: Chairman o Committee Head of O p Hc, . . o~e Mem er Member December 1978 ABSTRACT A Modified Variational...~i)l'l'&='(ALP@*&~ulV&](2. 13) or &+[0, (+V I&) (&lQSi. l0 l&0 2&&P~)i=-. -. ij &4 &&l&l&06&l&&'&&55&3. I& I"& '&~& I=. -'. It?& = e[5l&&&~ I?" 8l&0&t ~~&1 (2. 14) If we recall that H. $ I (r) = E' f . (r), that H. is hermitian, and that i n(m n nLm 1 the g I (r...

Parnell, Gregory Elliott

1978-01-01T23:59:59.000Z

339

Effect of modifying host oil on coprocessing  

SciTech Connect (OSTI)

Petroleum is rich in aliphatic and naphthenic compounds, but usually contains relatively few aromatic or hydroaromatic compounds. This paper will explore ways in which petroleum resids (1000{degrees}F+) can be modified to improve them as coprocessing media with coal. Modifications of the resid include (1) hydrogenation with iron and molybdenum-based catalysts, (2) mild hydrogenation with dicobalt octacarbonyl (CO{sub 2}(CO){sub 8}) to convert any aromatics in the resid to hydroaromatics, (3) addition of certain polynuclear aromatic compounds that are excellent hydrogen shuttlers, and (4) catalytic hydrocracking of the resid. The untreated resid and modified oils were evaluated in thermal and catalytic coprocessing experiments. Measures for evaluating coprocessing performance include the fraction of coal converted to M soluble products and the yield of distillable oil, as measured using simulated distillation.

Hajdu, P.E.; Tierney, J.W.; Wender, I. [Univ. of Pittsburgh, PA (United States)

1995-12-01T23:59:59.000Z

340

TERMINATION OF THE POROUS WALL CONCEPT To: APEX GROUP  

E-Print Network [OSTI]

TERMINATION OF THE POROUS WALL CONCEPT To: APEX GROUP From: Anter El-Azab (anter@seas.ucla.edu) Re with Lithium will can not work and this concept should be terminated. For the case of vanadium alloy on this concept should be terminated. #12;TERMINATION OF THE POROUS WALL CONCEPT Best Regards, Anter #12;

California at Los Angeles, University of

Note: This page contains sample records for the topic "modified microgrid concept" 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

Product Concept Metrics: a Preliminary Study Working Paper  

E-Print Network [OSTI]

Metrics for product concept evaluation and screening is a relatively unstudied topic of product development.

Takala, Roope

342

Loads Analysis of Several Offshore Floating Wind Turbine Concepts  

SciTech Connect (OSTI)

This paper presents a comprehensive dynamic-response analysis of six offshore floating wind turbine concepts.

Robertson, A. N.; Jonkman, J. M.

2011-10-01T23:59:59.000Z

343

Testing Modified Gravity with Gravitational Wave Astronomy  

E-Print Network [OSTI]

The emergent area of gravitational wave astronomy promises to provide revolutionary discoveries in the areas of astrophysics, cosmology, and fundamental physics. One of the most exciting possibilities is to use gravitational-wave observations to test alternative theories of gravity. In this contribution we describe how to use observations of extreme-mass-ratio inspirals by the future Laser Interferometer Space Antenna to test a particular class of theories: Chern-Simons modified gravity.

Carlos F. Sopuerta; Nicolas Yunes

2010-10-01T23:59:59.000Z

344

Modified Newtonian dynamics from acceleration fluctuations  

E-Print Network [OSTI]

A speculative mathematical model is used to generate the modified Newtonian dynamics called MOND from fluctuations of the number of quanta of quantized acceleration. The one new parameter can be chosen either to make the transition to modification comparable to that obtained from the functions used to fit data with MOND, or to make the modification at larger accelerations comparable in magnitude to the unexplained accelerations of Pioneer 10 and 11.

Thomas F. Jordan

2004-02-16T23:59:59.000Z

345

Dust-shell Universe in the modified gravity scenario  

E-Print Network [OSTI]

The dynamics of the dust-shell model of universe is exactly solved for the modified Schwarzschild solution. This solution is used to derive the cosmology corresponding to the modified gravity.

Michael Maziashvili

2005-04-15T23:59:59.000Z

346

Concept of Operations for Data Fusion Visualization  

SciTech Connect (OSTI)

Situational awareness in the operations and supervision of a industrial system means that decision making entity, whether machine or human, have the important data presented in a timely manner. An optimal presentation of information such that the operator has the best opportunity accurately interpret and react to anomalies due to system degradation, failures or adversaries. Anticipated problems are a matter for system design; however, the paper will focus on concepts for situational awareness enhancement for a human operator when the unanticipated or unaddressed event types occur. Methodology for human machine interface development and refinement strategy is described for a synthetic fuels plant model. A novel concept for adaptively highlighting the most interesting information in the system and a plan for testing the methodology is described.

T.R. McJunkin; R.L. Boring; M.A. McQueen; L.P. Shunn; J.L. Wright; D.I. Gertman; O. Linda; K. McCarty; M. Manic

2011-09-01T23:59:59.000Z

347

Organically modified silicate coatings for optical fibers A. B. Wojcik  

E-Print Network [OSTI]

Organically modified silicate coatings for optical fibers A. B. Wojcik L. C. Klein V. V. Rondinella 909 Piscataway, NJ 08855-0909 ABSTRACT Three kinds of UV-curable organically modified silicates have linked to inorganics. In particular, organically modified silicates were investigated. In the search

Matthewson, M. John

348

A virtual company concept for reservoir management  

SciTech Connect (OSTI)

This paper describes how reservoir management problems were pursued with a virtual company concept via the Internet and World Wide Web. The focus of the paper is on the implementation of virtual asset management teams that were assembled with small independent oil companies. The paper highlights the mechanics of how the virtual team transferred data and interpretations, evaluated geological models of complex reservoirs, and used results of simulation studies to analyze various reservoir management strategies.

Martin, F.D. [Dave Martin and Associates, Inc. (United States); Kendall, R.P.; Whitney, E.M. [Los Alamos National Lab., NM (United States)

1998-12-31T23:59:59.000Z

349

Conception Wind Project | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentratingRenewable Solutions LLC Jump to: navigation,Area (Keith, Et Al.,Conception Wind Project

350

Abstract-A hybrid cascaded multilevel inverter application for renewable energy resources including a reconfiguration  

E-Print Network [OSTI]

be achieved by using the microgrid concept as discussed in [2]. Data center or telecommunication buildings an alternative topology of hybrid cascaded multilevel inverter applied to a low voltage dc microgrid, micro-turbine, wind turbine and fuel cell put forward many promising applications with high efficiency

Tolbert, Leon M.

351

A dynamic kernel modifier for linux  

SciTech Connect (OSTI)

Dynamic Kernel Modifier, or DKM, is a kernel module for Linux that allows user-mode programs to modify the execution of functions in the kernel without recompiling or modifying the kernel source in any way. Functions may be traced, either function entry only or function entry and exit; nullified; or replaced with some other function. For the tracing case, function execution results in the activation of a watchpoint. When the watchpoint is activated, the address of the function is logged in a FIFO buffer that is readable by external applications. The watchpoints are time-stamped with the resolution of the processor high resolution timers, which on most modem processors are accurate to a single processor tick. DKM is very similar to earlier systems such as the SunOS trace device or Linux TT. Unlike these two systems, and other similar systems, DKM requires no kernel modifications. DKM allows users to do initial probing of the kernel to look for performance problems, or even to resolve potential problems by turning functions off or replacing them. DKM watchpoints are not without cost: it takes about 200 nanoseconds to make a log entry on an 800 Mhz Pentium-Ill. The overhead numbers are actually competitive with other hardware-based trace systems, although it has less 'Los Alamos National Laboratory is operated by the University of California for the National Nuclear Security Administration of the United States Department of Energy under contract W-7405-ENG-36. accuracy than an In-Circuit Emulator such as the American Arium. Once the user has zeroed in on a problem, other mechanisms with a higher degree of accuracy can be used.

Minnich, R. G. (Ronald G.)

2002-09-03T23:59:59.000Z

352

ADVANCED HIGH PERFORMANCE SOLID WALL BLANKET CONCEPTS  

SciTech Connect (OSTI)

OAK A271 ADVANCED HIGH PERFORMANCE SOLID WALL BLANKET CONCEPTS. First wall and blanket (FW/blanket) design is a crucial element in the performance and acceptance of a fusion power plant. High temperature structural and breeding materials are needed for high thermal performance. A suitable combination of structural design with the selected materials is necessary for D-T fuel sufficiency. Whenever possible, low afterheat, low chemical reactivity and low activation materials are desired to achieve passive safety and minimize the amount of high-level waste. Of course the selected fusion FW/blanket design will have to match the operational scenarios of high performance plasma. The key characteristics of eight advanced high performance FW/blanket concepts are presented in this paper. Design configurations, performance characteristics, unique advantages and issues are summarized. All reviewed designs can satisfy most of the necessary design goals. For further development, in concert with the advancement in plasma control and scrape off layer physics, additional emphasis will be needed in the areas of first wall coating material selection, design of plasma stabilization coils, consideration of reactor startup and transient events. To validate the projected performance of the advanced FW/blanket concepts the critical element is the need for 14 MeV neutron irradiation facilities for the generation of necessary engineering design data and the prediction of FW/blanket components lifetime and availability.

WONG, CPC; MALANG, S; NISHIO, S; RAFFRAY, R; SAGARA, S

2002-04-01T23:59:59.000Z

353

Evaluation of polyethylene-modified asphalt blends  

E-Print Network [OSTI]

aggregate and asphalt modified with LDPE (binder contents of 4. 8%%u and 5. 87'). 42 Table 9. Summary of statistical parameters derived from IDT testing on crushed granite mixtures bound with AC-20 + LDPE (4. 8%, and 5. 8/ binder). 46 Table 10. Summary... of creep to rupture data for crushed granite mixtures. 71 Table 11. Summary of the results of IDT repeated load fatigue testing of river gravel mixtures bound with Texaco asphalt: AC- 10, AC-10 + LDPE and AC-20. Table 12. K, ' and n, values of river...

Consuegra Granger, Fernando

1990-01-01T23:59:59.000Z

354

Chemically modified carbonic anhydrases useful in carbon capture systems  

DOE Patents [OSTI]

The present disclosure relates to chemically modified carbonic anhydrase polypeptides and soluble compositions, homogenous liquid formulations comprising them. The chemically modified carbonic anhydrase polypeptides have improved properties relative to the same carbonic anhydrase polypeptide that is not chemically modified including the improved properties of increased activity and/or stability in the presence of amine compounds, ammonia, or carbonate ion. The present disclosure also provides methods of preparing the chemically modified polypeptides and methods of using the chemically modified polypeptides for accelerating the absorption of carbon dioxide from a gas stream into a solution as well as for the release of the absorbed carbon dioxide for further treatment and/or sequestering.

Novick, Scott J; Alvizo, Oscar

2013-10-29T23:59:59.000Z

355

Chemically modified carbonic anhydrases useful in carbon capture systems  

DOE Patents [OSTI]

The present disclosure relates to chemically modified carbonic anhydrase polypeptides and soluble compositions, homogenous liquid formulations comprising them. The chemically modified carbonic anhydrase polypeptides have improved properties relative to the same carbonic anhydrase polypeptide that is not chemically modified including the improved properties of increased activity and/or stability in the presence of amine compounds, ammonia, or carbonate ion. The present disclosure also provides methods of preparing the chemically modified polypeptides and methods of using the chemically modified polypeptides for accelerating the absorption of carbon dioxide from a gas stream into a solution as well as for the release of the absorbed carbon dioxide for further treatment and/or sequestering.

Novick, Scott; Alvizo, Oscar

2013-01-15T23:59:59.000Z

356

Boron modified molybdenum silicide and products  

DOE Patents [OSTI]

A boron-modified molybdenum silicide material is disclosed having the composition comprising about 80 to about 90 weight % Mo, about 10 to about 20 weight % Si, and about 0.1 to about 2 weight % B and a multiphase microstructure including Mo{sub 5}Si{sub 3} phase as at least one microstructural component effective to impart good high temperature creep resistance. The boron-modified molybdenum silicide material is fabricated into such products as electrical components, such as resistors and interconnects, that exhibit oxidation resistance to withstand high temperatures in service in air as a result of electrical power dissipation, electrical resistance heating elements that can withstand high temperatures in service in air and other oxygen-bearing atmospheres and can span greater distances than MoSi{sub 2} heating elements due to improved creep resistance, and high temperature structural members and other fabricated components that can withstand high temperatures in service in air or other oxygen-bearing atmospheres while retaining creep resistance associated with Mo{sub 5}Si{sub 3} for structural integrity. 7 figs.

Meyer, M.K.; Akinc, M.

1999-02-02T23:59:59.000Z

357

Boron modified molybdenum silicide and products  

DOE Patents [OSTI]

A boron-modified molybdenum silicide material having the composition comprising about 80 to about 90 weight % Mo, about 10 to about 20 weight % Si, and about 0.1 to about 2 weight % B and a multiphase microstructure including Mo.sub.5 Si.sub.3 phase as at least one microstructural component effective to impart good high temperature creep resistance. The boron-modified molybdenum silicide material is fabricated into such products as electrical components, such as resistors and interconnects, that exhibit oxidation resistance to withstand high temperatures in service in air as a result of electrical power dissipation, electrical resistance heating elements that can withstand high temperatures in service in air and other oxygen-bearing atmospheres and can span greater distances than MoSi.sub.2 heating elements due to improved creep resistance, and high temperature structural members and other fabricated components that can withstand high temperatures in service in air or other oxygen-bearing atmospheres while retaining creep resistance associated with Mo.sub.5 Si.sub.3 for structural integrity.

Meyer, Mitchell K. (Idaho Falls, ID); Akinc, Mufit (Ames, IA)

1999-02-02T23:59:59.000Z

358

MODIFIED GRAVITY SPINS UP GALACTIC HALOS  

SciTech Connect (OSTI)

We investigate the effect of modified gravity on the specific angular momentum of galactic halos by analyzing the halo catalogs at z = 0 from high-resolution N-body simulations for a f(R) gravity model that meets the solar-system constraint. It is shown that the galactic halos in the f(R) gravity model tend to acquire significantly higher specific angular momentum than those in the standard {Lambda}CDM model. The largest difference in the specific angular momentum distribution between these two models occurs for the case of isolated galactic halos with mass less than 10{sup 11} h {sup -1} M {sub Sun }, which are likely least shielded by the chameleon screening mechanism. As the specific angular momentum of galactic halos is rather insensitive to other cosmological parameters, it can in principle be an independent discriminator of modified gravity. We speculate a possibility of using the relative abundance of low surface brightness galaxies (LSBGs) as a test of general relativity given that the formation of the LSBGs occurs in fast spinning dark halos.

Lee, Jounghun [Astronomy Program, Department of Physics and Astronomy, FPRD, Seoul National University, Seoul 151-747 (Korea, Republic of)] [Astronomy Program, Department of Physics and Astronomy, FPRD, Seoul National University, Seoul 151-747 (Korea, Republic of); Zhao, Gong-Bo [National Astronomy Observatories, Chinese Academy of Science, Beijing 100012 (China)] [National Astronomy Observatories, Chinese Academy of Science, Beijing 100012 (China); Li, Baojiu [Institute of Computational Cosmology, Department of Physics, Durham University, Durham DH1 3LE (United Kingdom)] [Institute of Computational Cosmology, Department of Physics, Durham University, Durham DH1 3LE (United Kingdom); Koyama, Kazuya, E-mail: jounghun@astro.snu.ac.kr [Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth, PO1 3FX (United Kingdom)] [Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth, PO1 3FX (United Kingdom)

2013-01-20T23:59:59.000Z

359

Anomalous diffusion modifies solar neutrino fluxes  

E-Print Network [OSTI]

Density and temperature conditions in the solar core suggest that the microscopic diffusion of electrons and ions could be nonstandard: Diffusion and friction coefficients are energy dependent, collisions are not two-body processes and retain memory beyond the single scattering event. A direct consequence of nonstandard diffusion is that the equilibrium energy distribution of particles departs from the Maxwellian one (tails goes to zero more slowly or faster than exponentially) modifying the reaction rates. This effect is qualitatively different from temperature and/or composition modification: Small changes in the number of particles in the distribution tails can strongly modify the rates without affecting bulk properties, such as the sound speed or hydrostatic equilibrium, which depend on the mean values from the distribution. This mechanism can considerably increase the range of predictions for the neutrino fluxes allowed by the current experimental values (cross sections and solar properties) and can be used to reduce the discrepancy between these predictions and the solar neutrino experiments.

G. Kaniadakis; A. Lavagno; M. Lissia; P. Quarati

1997-10-16T23:59:59.000Z

360

PREVENTIVE CONSERVATION: A CONCEPT SUITED TO THE CONSERVATION OF EARTHEN  

E-Print Network [OSTI]

PREVENTIVE CONSERVATION: A CONCEPT SUITED TO THE CONSERVATION OF EARTHEN ARCHITECTURAL HERITAGE and Construction Key words: Preventive conservation, traditional conservation practices, risk reduction, heritage management Abstract The concept of "preventive conservation" is relatively old as it has already been

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "modified microgrid concept" 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

Novel turbomachinery concepts for highly integrated airframe/propulsion systems  

E-Print Network [OSTI]

Two novel turbomachinery concepts are presented as enablers to advanced flight missions requiring integrated airframe/propulsion systems. The first concept is motivated by thermal management challenges in low-to-high Mach ...

Shah, Parthiv N

2007-01-01T23:59:59.000Z

362

Marginal Lands: Concept, Assessment and Management  

SciTech Connect (OSTI)

Marginal lands have received wide attention for their potential to improve food security and support bioenergy production. However, environmental, ecosystem service, and sustainability concerns have been widely raised over the use of marginal land. Knowledge of the extent, location, and quality of marginal lands as well as their assessment and management are limited and diverse. This paper provides a review of the historical development of marginal concept, its application and assessment. Limitations and priority research needs of marginal land assessment and management were discussed.

Kang, Shujiang [ORNL; Post, Wilfred M [ORNL; West, Tristram O. [Joint Global Change Research Institute, PNNL; Bandaru, Vara Prasad [ORNL; Izaurralde, Dr. R. Cesar [Pacific Northwest National Laboratory (PNNL); Wang, Dali [ORNL; Nichols, Dr Jeff A [ORNL

2013-01-01T23:59:59.000Z

363

Rodolfo Usigli's Concept of Dramatic Art.  

E-Print Network [OSTI]

tres elementos básicos de nuestra soberanía. . . . Cuauhtemoc representa el factor cul minante, el mito—en el más místico y respetable sentido—de la soberanía material; la Virgen de Guadalupe ... el mito—en el mismo sentido—de la soberanía... is established, ensuing events and conflicts must in evitably revolve about it as the focal point of the new reality. Usigli's theatre is intended to stimulate the audience's faith in the myth figures that he holds before them. This concept of myth formation...

Tilles, Solomon T.

1970-04-01T23:59:59.000Z

364

ATAC Process Proof of Concept Final Report  

SciTech Connect (OSTI)

Researchers at INL with funding from the Department of Energy’s Office of Electricity Delivery and Energy Reliability (DOE-OE) evaluated a novel approach for near real-time consumption of threat intelligence. Demonstration testing in an industry environment supported the development of this new process to assist the electric sector in securing their critical networks. This report provides the reader with an understanding of the methods used during this proof of concept project. The processes and templates were further advanced with an industry partner during an onsite assessment. This report concludes with lessons learned and a roadmap for final development of these materials for use by industry.

Bri Rolston; Sarah Freeman

2014-03-01T23:59:59.000Z

365

Alternative Concepts and Technology | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160 East 300Algoil JumpAltergy Systems Place: Folsom, CaliforniaConcepts and Technology

366

Renewable Energy Project Development: Advanced Concept Topics  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergy 0611__Joint_DOE_GoJ_AMS_Data_v3.pptx MoreNovember 21,Regional U.S. Catalog ofCommunityConcept

367

IPFR: Integrated Pool Fusion Reactor concept  

SciTech Connect (OSTI)

The IPFR (Integrated Pool Fusion Reactor) concept is to place a fusion reactor into a pool of molten Flibe. The Flibe will serve the multiple functions of breeding, cooling, shielding, and moderating. Therefore, the only structural material between the superconducting magnets and the plasma is the first wall. The first wall is a stand-alone structure with no coolant connection and is cooled by Flibe at the atmospheric pressure. There is also no need of the primary coolant loop. The design is expected to improve the safety, reliability, and maintainability aspects of the fusion system.

Sze, D.K.

1986-01-01T23:59:59.000Z

368

Hf propagation through actively modified ionospheres  

SciTech Connect (OSTI)

We have developed a computer modeling capability to predict the effect of localized electron density perturbations created by chemical releases or high-power radio frequency heating upon oblique, one-hop hf propagation paths. We have included 3-d deterministic descriptions of the depleted or enhanced ionization, including formation, evolution, and drift. We have developed a homing ray trace code to calculate the path of energy propagation through the modified ionosphere in order to predict multipath effects. We also consider the effect of random index of refraction variations using a formalism to calculate the mutual coherence functions for spatial and frequency separations based upon a path integral solution of the parabolic wave equation for a single refracted path through an ionosphere which contains random electron density fluctuations. 5 refs., 8 figs.

Argo, P.E.; Fitzgerald, T.J.; Wolcott, J.H.; Simons, D.J. (Los Alamos National Lab., NM (USA)); Warshaw, S.; Carlson, R. (Lawrence Livermore National Lab., CA (USA))

1990-01-01T23:59:59.000Z

369

Nitroimidazoles as modifiers of nitrosourea pharmacokinetics  

SciTech Connect (OSTI)

The effect of a number of nitroimidazole sensitizers of varying lipophilicity has been studied on the pharmacokinetics of CCNU in mice. It was found that the effectiveness of these compounds in producing pharmacokinetic effects correlated directly with their lipophilicity. The effects of MISO on the pharmacokinetics of 4 nitrosoureas of differing lipophilicity were also investigated. The plasma clearances of CCNU, BCNU and MeCCNU (high lipophilicity) were slowed by MISO whereas that of chlorozotocin (Chlz) (low lipophilicity) was unaffected. Thus, it seems that for a pharmacokinetic interaction to occur between a nitroimidazole and a nitrosourea, both the modifier and the cytotoxic agent must have a requisite degree of lipophilicity. As the same requirement appears to hold for enhancement of tumor response, these data provide further evidence that pharmacokinetic modification plays a major role in chemosensitization.

Lee, F.Y.F.; Workman, P.

1984-09-01T23:59:59.000Z

370

Dynamical friction in modified Newtonian dynamics  

E-Print Network [OSTI]

We have tested a previous analytical estimate of the dynamical friction timescale in Modified Newtonian Dynamics (MOND) with fully non-linear N-body simulations. The simulations confirm that the dynamical friction timescale is significantly shorter in MOND than in equivalent Newtonian systems, i.e. systems with the same phase-space distribution of baryons and additional dark matter. An apparent conflict between this result and the long timescales determined for bars to slow and mergers to be completed in previous N-body simulations of MOND systems is explained. The confirmation of the short dynamical-friction timescale in MOND underlines the challenge that the Fornax dwarf spheroidal poses to the viability of MOND.

C. Nipoti; L. Ciotti; J. Binney; P. Londrillo

2008-03-31T23:59:59.000Z

371

The Magellanic Stream in Modified Newtonian Dynamics  

E-Print Network [OSTI]

The dynamics of the Magellanic Stream (MS) as a series of clouds extending from the Magellanic Clouds (MCs) to the south Galactic pole is affected by the distribution and the amount of matter in the Milky Way. We calculate the gravitational effect of the Galactic disk on the MS in the framework of modified Newtonian dynamics(MOND) and compare with observations of the Stream's radial velocity. We consider the tidal force of the Galaxy, which strips material from the MCs to form the MS, and, using a no-halo model of the Galaxy, we ignore the effect of the drag of the Galactic halo on the MS. We also compare the MONDian dynamics with that in logarithmic and power-law dark halo models and show that the MOND theory seems plausible for describing the dynamics of satellite galaxies such as the MCs. Finally, we perform a maximum likelihood analysis to obtain the best MOND parameters for the Galactic disk.

Hossein Haghi; Sohrab Rahvar; Akram Hasani-Zonooz

2007-01-09T23:59:59.000Z

372

A NEW GAS TURBINE ENGINE CONCEPT FOR ELECTRICITY  

E-Print Network [OSTI]

A NEW GAS TURBINE ENGINE CONCEPT FOR ELECTRICITY GENERATION WITH INCREASED EFFICIENCY AND POWER REPORT (FAR) A NEW GAS TURBINE ENGINE CONCEPT FOR ELECTRICITY GENERATION WITH INCREASED EFFICIENCY://www.energy.ca.gov/research/index.html. #12;Page 1 A New Gas Turbine Engine Concept For Electricity Generation With Increased

373

Do Concept Inventories Actually Measure Anything? Colin S. Wallace  

E-Print Network [OSTI]

Do Concept Inventories Actually Measure Anything? Colin S. Wallace University of Colorado Society. All rights reserved. Abstract Although concept inventories are among the most frequently used it to the Star Properties Concept Inventory. We also use IRT to explore an important psychometrics debate

Colorado at Boulder, University of

374

Assessment of Learning Outcomes Using a Mathematical Reasoning Concept Inventory  

E-Print Network [OSTI]

Assessment of Learning Outcomes Using a Mathematical Reasoning Concept Inventory Svetlana V Using a Mathematical Reasoning Concept Inventory Svetlana V. Drachova-Strang Jason O. Hallstrom Rich Pak the students have learned those skills. It presents a comprehensive Reasoning Concept Inventory (RCI

Hallstrom, Jason

375

Assessment of Learning Outcomes Using a Mathematical Reasoning Concept Inventory  

E-Print Network [OSTI]

Assessment of Learning Outcomes Using a Mathematical Reasoning Concept Inventory Svetlana Drachova Reasoning Concept Inventory Svetlana V. Drachova Jason O. Hallstrom Murali Sitaraman Clemson University Reasoning Concept Inventory (RCI) that captures the finer details of basic skills students need to possess

Hallstrom, Jason

376

The comparative effect of individually-generated vs. collaboratively-generated computer-based concept mapping on science concept learning  

E-Print Network [OSTI]

Using a quasi-experimental design, the researcher investigated the comparative effects of individually-generated and collaboratively-generated computer-based concept mapping on middle school science concept learning. Qualitative data were analyzed...

Kwon, So Young

2007-09-17T23:59:59.000Z

377

ASME Material Challenges for Advanced Reactor Concepts  

SciTech Connect (OSTI)

This study presents the material Challenges associated with Advanced Reactor Concept (ARC) such as the Advanced High Temperature Reactor (AHTR). ACR are the next generation concepts focusing on power production and providing thermal energy for industrial applications. The efficient transfer of energy for industrial applications depends on the ability to incorporate cost-effective heat exchangers between the nuclear heat transport system and industrial process heat transport system. The heat exchanger required for AHTR is subjected to a unique set of conditions that bring with them several design challenges not encountered in standard heat exchangers. The corrosive molten salts, especially at higher temperatures, require materials throughout the system to avoid corrosion, and adverse high-temperature effects such as creep. Given the very high steam generator pressure of the supercritical steam cycle, it is anticipated that water tube and molten salt shell steam generators heat exchanger will be used. In this paper, the ASME Section III and the American Society of Mechanical Engineers (ASME) Section VIII requirements (acceptance criteria) are discussed. Also, the ASME material acceptance criteria (ASME Section II, Part D) for high temperature environment are presented. Finally, lack of ASME acceptance criteria for thermal design and analysis are discussed.

Piyush Sabharwall; Ali Siahpush

2013-07-01T23:59:59.000Z

378

A globally convergent modified conjugate-gradient line-search ...  

E-Print Network [OSTI]

Sep 23, 2009 ... Further, we provide a new variant of modified conjugate gradient algorithms ... optimization, trust region methods, conjugate gradient method.

Wenwen Zhou

2009-09-23T23:59:59.000Z

379

Institute of Computer Science A modified limited-memory BNS ...  

E-Print Network [OSTI]

Institute of Computer Science. Academy of Sciences of the Czech Republic. A modified limited-memory BNS method for unconstrained minimization based on ...

2014-03-12T23:59:59.000Z

380

aqueous nickel-nitrilotriacetate modified: Topics by E-print...  

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

we examine the effective interactions introduced between the droplets of an oil in water microemulsion upon progressive addition of hydrophobically modified water soluble...

Note: This page contains sample records for the topic "modified microgrid concept" 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

Values and the quantum conception of man  

SciTech Connect (OSTI)

Classical mechanics is based upon a mechanical picture of nature that is fundamentally incorrect. It has been replaced at the basic level by a radically different theory: quantum mechanics. This change entails an enormous shift in one`s basic conception of nature, one that can profoundly alter the scientific image of man himself. Self-image is the foundation of values, and the replacement of the mechanistic self-image derived from classical mechanics by one concordant with quantum mechanics may provide the foundation of a moral order better suited to today`s times, a self-image that endows human life with meaning, responsibility, and a deeper linkage to nature as a whole.

Stapp, H.P.

1995-06-01T23:59:59.000Z

382

A CONCEPT FOR NATIONAL NUCLEAR FORENSIC LIBRARIES  

SciTech Connect (OSTI)

The interpretation of data from the nuclear forensic analysis of illicit nuclear material of unknown origin requires comparative data from samples of known origin. One way to provide such comparative data is to create a system of national nuclear forensics libraries, in which each participating country stores information about nuclear or other radioactive material that either resides in or was manufactured by that country. Such national libraries could provide an authoritative record of the material located in or produced by a particular country, and thus forms an essential prerequisite for a government to investigate illicit uses of nuclear or other radioactive material within its borders. We describe the concept of the national nuclear forensic library, recommendations for content and structure, and suggested querying methods for utilizing the information for addressing nuclear smuggling.

Wacker, John F.; Curry, Michael

2010-08-11T23:59:59.000Z

383

Calibration of a Modified Californium Shuffler  

SciTech Connect (OSTI)

A californium shuffler originally designed to assay hollow cylindrical pieces of UA1 has been modified to assay solid cylinders. Calibration standards were characterized via chemical analysis of the molten UA1 taken during casting of the standards. The melt samples yielded much more reliable characterization data than drill samples taken from standards after the standards had solidified. By normalizing one well-characterized calibration curve to several standards at different enrichments, a relatively small number of standards was required to develop an enrichment-dependent calibration. The precision of this shuffler is 0.65%, and the typical random and systematic uncertainties are 0.53% and 0.73%, respectively, for a six minute assay of an ingot containing approximately 700 grams of {sup 235}U. This paper will discuss (1) the discrepancies encountered when UA1 standards were characterized via melt samples versus drill samples, (2) a calibration methodology employing a small number of standards, and (3) a comparison of results from a previously unused shuffler with an existing shuffler. A small number of UA1 standards have been characterized using samples from the homogeneous molten state and have yielded enrichment-dependent and enrichment-independent calibration curves on two different shufflers.

Sadowski, E.T.; Armstrong, F. [Westinghouse Savannah River Company, AIKEN, SC (United States); Oldham, R. [USDOE New Brunswick Lab., Argonne, IL (United States); Ceo, R.; Williams, N. [Lockheed Martin Energy Systems, Inc., Oak Ridge, TN (United States)

1995-06-01T23:59:59.000Z

384

Validation, Proof-of-Concept, and Postaudit of the Groundwater Flow and Transport Model of the Project Shoal Area  

SciTech Connect (OSTI)

The groundwater flow and radionuclide transport model characterizing the Shoal underground nuclear test has been accepted by the State of Nevada Division of Environmental Protection. According to the Federal Facility Agreement and Consent Order (FFACO) between DOE and the State of Nevada, the next steps in the closure process for the site are then model validation (or postaudit), the proof-of-concept, and the long-term monitoring stage. This report addresses the development of the validation strategy for the Shoal model, needed for preparing the subsurface Corrective Action Decision Document-Corrective Action Plan and the development of the proof-of-concept tools needed during the five-year monitoring/validation period. The approach builds on a previous model, but is adapted and modified to the site-specific conditions and challenges of the Shoal site.

Ahmed Hassan

2004-09-01T23:59:59.000Z

385

A modified LandauDevonshire thermodynamic potential for strontium titanate  

E-Print Network [OSTI]

A modified Landau­Devonshire thermodynamic potential for strontium titanate G. Sheng, Y. L. Li, J Landau­Devonshire thermodynamic potential for strontium titanate G. Sheng,1,a Y. L. Li,2 J. X. Zhang,1,b of the Landau energy coefficients and report a modified thermodynamic potential for bulk strontium titanate

Chen, Long-Qing

386

Role of Modified Chaplygin Gas in Accelerated Universe  

E-Print Network [OSTI]

In this paper we have considered a model of modified Chaplygin gas and its role in accelerating phase of the universe. We have assumed that the equation of state of this modified model is valid from the radiation era to $\\Lambda$CDM model. We have used recently developed statefinder parameters in characterizing different phase of the universe diagrammatically.

Ujjal Debnath; Asit Banerjee; Subenoy Chakraborty

2004-11-02T23:59:59.000Z

387

Kaluza-Klein Cosmology With Modified Holographic Dark Energy  

E-Print Network [OSTI]

We investigate the compact Kaluza-Klein cosmology in which modified holographic dark energy is interacting with dark matter. Using this scenario, we evaluate equation of state parameter as well as equation of evolution of the modified holographic dark energy. Further, it is shown that the generalized second law of thermodynamics holds without any constraint.

M. Sharif; Farida Khanum

2011-06-13T23:59:59.000Z

388

Additional reductions in the k-constrained modified KP hierarchy  

E-Print Network [OSTI]

Additional reductions in the modified k-constrained KP hierarchy are proposed. As a result we obtain generalizations of Kaup-Broer system, Korteweg-de Vries equation and a modification of Korteweg-de Vries equation that belongs to modified k-constrained KP hierarchy. We also propose solution generating technique based on binary Darboux transformations for the obtained equations.

Oleksandr Chvartatskyi; Yuriy Sydorenko

2013-12-30T23:59:59.000Z

389

Holographic Dark Energy Model with Modified Variable Chaplygin Gas  

E-Print Network [OSTI]

In this letter we consider a correspondence between holographic dark energy and variable modified Chaplygin gas to obtain a holographic dark energy model of the universe. The corresponding potential of the scalar field has been reconstructed which describes the modified variable Chaplygin gas. The stability of the holographic dark energy in this case is also discussed.

B. C. Paul

2010-06-17T23:59:59.000Z

390

RESEARCH ARTICLE Seed bank persistence of genetically modified canola  

E-Print Network [OSTI]

RESEARCH ARTICLE Seed bank persistence of genetically modified canola in California Douglas J-Verlag 2012 Abstract Introduction Canola, which is genetically modified (GM) for tolerance to glyphosate, has of glyphosate. Methods Volunteer from dormant canola seeds produced thousands of plants per hectare

California at Davis, University of

391

Safety pharmacology — Current and emerging concepts  

SciTech Connect (OSTI)

Safety pharmacology (SP) is an essential part of the drug development process that aims to identify and predict adverse effects prior to clinical trials. SP studies are described in the International Conference on Harmonisation (ICH) S7A and S7B guidelines. The core battery and supplemental SP studies evaluate effects of a new chemical entity (NCE) at both anticipated therapeutic and supra-therapeutic exposures on major organ systems, including cardiovascular, central nervous, respiratory, renal and gastrointestinal. This review outlines the current practices and emerging concepts in SP studies including frontloading, parallel assessment of core battery studies, use of non-standard species, biomarkers, and combining toxicology and SP assessments. Integration of the newer approaches to routine SP studies may significantly enhance the scope of SP by refining and providing mechanistic insight to potential adverse effects associated with test compounds. - Highlights: • SP — mandatory non-clinical risk assessments performed during drug development. • SP organ system studies ensure the safety of clinical participants in FiH trials. • Frontloading in SP facilitates lead candidate drug selection. • Emerging trends: integrating SP-Toxicological endpoints; combined core battery tests.

Hamdam, Junnat; Sethu, Swaminathan; Smith, Trevor; Alfirevic, Ana; Alhaidari, Mohammad [MRC Centre for Drug Safety Science, University of Liverpool (United Kingdom); Atkinson, Jeffrey [Lorraine University Pharmacolor Consultants Nancy PCN (France); Ayala, Mimieveshiofuo; Box, Helen; Cross, Michael [MRC Centre for Drug Safety Science, University of Liverpool (United Kingdom); Delaunois, Annie [UCB Pharma (Belgium); Dermody, Ailsa; Govindappa, Karthik [MRC Centre for Drug Safety Science, University of Liverpool (United Kingdom); Guillon, Jean-Michel [Sanofi-aventis (France); Jenkins, Rosalind [MRC Centre for Drug Safety Science, University of Liverpool (United Kingdom); Kenna, Gerry [Astra-Zeneca (United Kingdom); Lemmer, Björn [Ruprecht-Karls-Universität Heidelberg (Germany); Meecham, Ken [Huntingdon Life Sciences (United Kingdom); Olayanju, Adedamola [MRC Centre for Drug Safety Science, University of Liverpool (United Kingdom); Pestel, Sabine [Boehringer-Ingelheim (Germany); Rothfuss, Andreas [Roche (Switzerland); and others

2013-12-01T23:59:59.000Z

392

Low technology high tritium breeding blanket concept  

SciTech Connect (OSTI)

The main function of this low technology blanket is to produce the necessary tritium for INTOR operation with minimum first wall coverage. The INTOR first wall, blanket, and shield are constrained by the dimensions of the reference design and the protection criteria required for different reactor components and dose equivalent after shutdown in the reactor hall. It is assumed that the blanket operation at commercial power reactor conditions and the proper temperature for power generation can be sacrificed to achieve the highest possible tritium breeding ratio with minimum additional research and developments and minimal impact on reactor design and operation. A set of blanket evaluation criteria has been used to compare possible blanket concepts. Six areas: performance, operating requirements, impact on reactor design and operation, safety and environmental impact, technology assessment, and cost have been defined for the evaluation process. A water-cooled blanket was developed to operate with a low temperature and pressure. The developed blanket contains a 24 cm of beryllium and 6 cm of solid breeder both with a 0.8 density factor. This blanket provides a local tritium breeding ratio of approx.2.0. The water coolant is isolated from the breeder material by several zones which eliminates the tritium buildup in the water by permeation and reduces the changes for water-breeder interaction. This improves the safety and environmental aspects of the blanket and eliminates the costly process of the tritium recovery from the water. 12 refs., 13 tabs.

Gohar, Y.; Baker, C.C.; Smith, D.L.; Billone, M.C.; Cha, Y.S.; Clemmer, R.; Finn, P.A.; Hassanein, A.M.; Johnson, C.E.; Liu, Y.

1987-10-01T23:59:59.000Z

393

Reference repository design concept for bedded salt  

SciTech Connect (OSTI)

A reference design concept is presented for the subsurface portions of a nuclear waste repository in bedded salt. General geologic, geotechnical, hydrologic and geochemical data as well as descriptions of the physical systems are provided for use on generic analyses of the pre- and post-sealing performance of repositories in this geologic medium. The geology of bedded salt deposits and the regional and repository horizon stratigraphy are discussed. Structural features of salt beds including discontinuities and dissolution features are presented and their effect on repository performance is discussed. Seismic hazards and the potential effects of earthquakes on underground repositories are presented. The effect on structural stability and worker safety during construction from hydrocarbon and inorganic gases is described. Geohydrologic considerations including regional hydrology, repository scale hydrology and several hydrological failure modes are presented in detail as well as the hydrological considerations that effect repository design. Operational phase performance is discussed with respect to operations, ventilation system, shaft conveyances, waste handling and retrieval systems and receival rates of nuclear waste. Performance analysis of the post sealing period of a nuclear repository is discussed, and parameters to be used in such an analysis are presented along with regulatory constraints. Some judgements are made regarding hydrologic failure scenarios. Finally, the design and licensing process, consistent with the current licensing procedure is described in a format that can be easily understood.

Carpenter, D.W.; Martin, R.W.

1980-10-08T23:59:59.000Z

394

assisted conception affect: Topics by E-print Network  

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

of - Research Archive Summary: Objectives: Previous literature suggests that dyslexia affects self-esteem and self-concept in school children (Humphrey & Mullins, 2004)....

395

aim concept part: Topics by E-print Network  

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

aircraft propulsion, gas turbine engines, fault detection and isolation, statistical pattern recognition 1 Ray, Asok 10 Canopy spectral invariants. Part 1: A new concept in...

396

Investigation of ${}^9$Be from nonlocalized clustering concept  

E-Print Network [OSTI]

The nonlocalized aspect of clustering, which is a new concept for self-conjugate nuclei, is extended for the investigation of the N{\

Mengjiao Lyu; Zhongzhou Ren; Bo Zhou; Yasuro Funaki; Hisashi Horiuchi; Gerd Röpke; Peter Schuck; Akihiro Tohsaki; Chang Xu; Taiichi Yamada

2014-12-31T23:59:59.000Z

397

Chapter 5: Basic Concepts for Clean Energy Unsecured Lending...  

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

Funds revfinalv3ch05basicconceptsdec9.pdf More Documents & Publications Path to Self-Sustainability Chapter 5. Basic Concepts for Clean Energy Unsecured Lending and Loan Loss...

398

Concept for Management of the Future Electricity System (Smart...  

Open Energy Info (EERE)

Management of the Future Electricity System (Smart Grid Project) Jump to: navigation, search Project Name Concept for Management of the Future Electricity System Country Denmark...

399

Quantum Structure in Cognition: Why and How Concepts are Entangled  

E-Print Network [OSTI]

One of us has recently elaborated a theory for modelling concepts that uses the state context property (SCoP) formalism, i.e. a generalization of the quantum formalism. This formalism incorporates context into the mathematical structure used to represent a concept, and thereby models how context influences the typicality of a single exemplar and the applicability of a single property of a concept, which provides a solution of the 'Pet-Fish problem' and other difficulties occurring in concept theory. Then, a quantum model has been worked out which reproduces the membership weights of several exemplars of concepts and their combinations. We show in this paper that a further relevant effect appears in a natural way whenever two or more concepts combine, namely, 'entanglement'. The presence of entanglement is explicitly revealed by considering a specific example with two concepts, constructing some Bell's inequalities for this example, testing them in a real experiment with test subjects, and finally proving that Bell's inequalities are violated in this case. We show that the intrinsic and unavoidable character of entanglement can be explained in terms of the weights of the exemplars of the combined concept with respect to the weights of the exemplars of the component concepts.

Diederik Aerts; Sandro Sozzo

2013-09-08T23:59:59.000Z

400

assisted conception originate: Topics by E-print Network  

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

Web document classification by combining and extending a number of the current Richards, Debbie 19 ORIGINAL ARTICLE Bringing forth mathematical concepts: signifying sensorimotor...

Note: This page contains sample records for the topic "modified microgrid concept" 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

Concept Testing and Development at the Raft River Geothermal...  

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

3 4.1.2 Concept Testing and Development at the Raft River Geothermal Field, Idaho Presentation Number: 007 Investigator: Moore, Joseph (University of Utah) Objectives: Develop and...

402

Clean Energy Finance Guide (Chapter 5: Basic Concepts for Clean...  

Energy Savers [EERE]

Lending and Loan Loss Reserve Funds More Documents & Publications Path to Self-Sustainability Chapter 5. Basic Concepts for Clean Energy Unsecured Lending and Loan Loss Reserve...

403

Repository Reference Disposal Concepts and Thermal Load Management...  

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

Thermal Load Management Analysis A disposal concept consists of three parts: waste inventory (7 waste types examined), geologic setting (e.g., clayshale, salt, crystalline,...

404

Development of a low swirl injector concept for gas turbines  

E-Print Network [OSTI]

Injector Concept for Gas Turbines Robert K. Cheng * , Scottconcept for ultra- low NO x gas turbines. Low-swirl flamevirtually every industrial gas turbine manufacturer to meet

Cheng, R.K.; Fable, S.A.; Schmidt, D.; Arellano, L.; Smith, K.O.

2000-01-01T23:59:59.000Z

405

advanced atomization concept: Topics by E-print Network  

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

S. Bangert; Donald P. Garber; Lawrence D. Huebner; Robert E 2000-01-01 71 Novel turbomachinery concepts for highly integrated airframepropulsion systems MIT - DSpace Summary:...

406

Energy Star Concepts for Highway Vehicles  

SciTech Connect (OSTI)

The authors of this report, under the sponsorship of the U.S. Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE) Weatherization and Intergovernmental Program, have investigated the possible application of Energy Star ratings to passenger cars and light trucks. This study establishes a framework for formulating and evaluating Energy Star rating methods that is comprised of energy- and environmental-based metrics, potential vehicle classification systems, vehicle technology factors, and vehicle selection criteria. The study tests several concepts and Energy Star rating methods using model-year 2000 vehicle data--a spreadsheet model has been developed to facilitate these analyses. This study tests two primary types of rating systems: (1) an outcome-based system that rates vehicles based on fuel economy, GHG emissions, and oil use and (2) a technology-based system that rates vehicles based on the energy-saving technologies they use. Rating methods were evaluated based on their ability to select vehicles with high fuel economy, low GHG emissions, and low oil use while preserving a full range of service (size and acceleration) and body style choice. This study concludes that an Energy Star rating for passenger cars and light trucks is feasible and that several methods could be used to achieve reasonable tradeoffs between low energy use and emissions and diversity in size, performance, and body type. It also shows that methods that consider only fuel economy, GHG emissions, or oil use will not select a diverse mix of vehicles. Finally, analyses suggest that methods that encourage the use of technology only, may result in increases in acceleration power and weight rather than reductions in oil use and GHG emissions and improvements in fuel economy.

Greene, D.L.

2003-06-24T23:59:59.000Z

407

Advanced progress concepts for direct coal liquefaction  

SciTech Connect (OSTI)

Given the low cost of petroleum crude, direct coal liquefaction is still not an economically viable process. The DOE objectives are to further reduce the cost of coal liquefaction to a more competitive level. In this project the primary focus is on the use of low-rank coal feedstocks. A particular strength is the use of process-derived liquids rather than model compound solvents. The original concepts are illustrated in Figure 1, where they are shown on a schematic of the Wilsonville pilot plant operation. Wilsonville operating data have been used to define a base case scenario using run {number_sign}263J, and Wilsonville process materials have been used in experimental work. The CAER has investigated: low severity CO pretreatment of coal for oxygen rejection, increasing coal reactivity and mg inhibiting the propensity for regressive reactions; the application of more active. Low-cost Fe and Mo dispersed catalysts; and the possible use of fluid coking for solids rejection and to generate an overhead product for recycle. CONSOL has investigated: oil agglomeration for coal ash rejection, for the possible rejection of ash in the recycled resid, and for catalyst addition and recovery; and distillate dewaxing to remove naphthenes and paraffins, and to generate an improved quality feed for recycle distillate hydrogenation. At Sandia, research has been concerned with the production of active hydrogen donor distillate solvent fractions produced by the hydrogenation of dewaxed distillates and by fluid coking via low severity reaction with H{sub 2}/CO/H{sub 2}O mixtures using hydrous metal oxide and other catalysts.

Anderson, R.; Derbyshire, F.; Givens, E. [Univ. of Kentucky Center for Applied Energy Research, Lexington, KY (United States)] [and others

1995-09-01T23:59:59.000Z

408

Concept Acquisition: How to get something from nothing Dan Ryder, UNC Chapel Hill  

E-Print Network [OSTI]

get concepts from something that's not concepts. Suppose we get concepts from other concepts, that is the goal of a blank slate, we need to show that it's possible to derive concepts from something thatConcept Acquisition: How to get something from nothing Dan Ryder, UNC ­ Chapel Hill [Blank overhead

Ryder, Dan

409

Microgrids and Heterogeneous Power Quality and Reliability  

E-Print Network [OSTI]

high security, quality, reliability, and availability”, IEEELave, and Marija Ilic: “Creating Reliability Choice: HowBuilding Less Reliability into Electric Power Grids Could

Marnay, Chris

2008-01-01T23:59:59.000Z

410

Advanced LVDC Electrical Power Architectures and Microgrids  

E-Print Network [OSTI]

, respectively. The outcome of this industrial war was strongly influenced by work of Nikola Tesla who invented

Vasquez, Juan Carlos

411

Lessons Learned from Microgrid Demonstrations Worldwide  

E-Print Network [OSTI]

and test systems”, Renewable and Sustainable Energy Reviews,around the world-a review”, Renewable and Sustainable Energy29 Hachinohe Project (an all-renewable

Marnay, Chris

2014-01-01T23:59:59.000Z

412

Multiagent Coordination in Microgrids via Wireless Networks  

E-Print Network [OSTI]

is indispensable to incorporate more distributed energy resource (DER) units, such as the distributed generation load (or generator) or islanded as a self-sustained power system, which significantly simplifies by localized elec- tricity generation, storage, and consumption. Wireless communication is a promising means

Shen, Xuemin "Sherman"

413

Microgrids: distributed on-site generation  

E-Print Network [OSTI]

electricity and heat supply; · Need for energy storage, both electrical and thermal; · Relationship between

Watson, Andrew

414

How Microgrids Work | Department of Energy  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) " ,"ClickPipelinesProvedDecember 2005DepartmentDecemberGlossaryEnergy andAction Center » JobsDoes a

415

Microgrid Equipment Selection and Control in Buildings  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department of EnergyDevelopmentTechnologiesfrom Biodegradable Materials

416

Lessons Learned from Microgrid Demonstrations Worldwide  

E-Print Network [OSTI]

energy resources, such as small hydro, wind, biomass, andSolar PV Biomass Wind Small hydro Figure 6: China’s feed-in

Marnay, Chris

2014-01-01T23:59:59.000Z

417

Lessons Learned from Microgrid Demonstrations Worldwide  

E-Print Network [OSTI]

CCHP .energy functions: CHP and CCHP Demands for electricity,and power, technologies (CCHP), deployed successfully by the

Marnay, Chris

2014-01-01T23:59:59.000Z

418

Lessons Learned from Microgrid Demonstrations Worldwide  

E-Print Network [OSTI]

Environmental Energy Technologies Division Lawrence Berkeley18 Recommendation 3: Match technology to end-use31 Illinois Institute of Technology Project (a perfect power

Marnay, Chris

2014-01-01T23:59:59.000Z

419

International Microgrid Assessment: Governance, Incentives, and Experience  

E-Print Network [OSTI]

Marnay Environmental Energy Technologies Division, Lawrencedemand response payments Technology R&D funding; Land ofpayments using policy and technology Figure 2. Overview of

Zhou, Nan

2014-01-01T23:59:59.000Z

420

Sandia National Laboratories: Building a Microgrid  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive SolarEducation Programs: CroSSlinksHumannitrideWorkshopsBrayton

Note: This page contains sample records for the topic "modified microgrid concept" 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

Sandia National Laboratories: advanced microgrid system  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1development Sandia, NREL Release Wave EnergyLinksZpartsmicrogrid system New Jersey

422

Holographic Dark Energy Model with Modified Generalized Chaplygin Gas  

E-Print Network [OSTI]

We present a holographic dark energy model of the universe considering modified generalized Chaplygin gas (GCG). The modified GCG behaves as an ordinary barotropic fluid in the early epoch when the universe was tiny but behaves subsequently as a $\\Lambda$CDM model at late epoch. An equivalent model with scalar field is obtained here by constructing the corresponding potential. The holographic dark energy is identified with the modified GCG and we determine the corresponding holographic dark energy field and its potential. The stability of the holographic dark energy in this case is also discussed.

B. C. Paul; P. Thakur; A. Saha

2007-11-21T23:59:59.000Z

423

Understanding As A Teleonomical Concept -fundamentals of the hermeneutical game-  

E-Print Network [OSTI]

Understanding As A Teleonomical Concept -fundamentals of the hermeneutical game- MSc Thesis of Contents 1. Foreword 1 - 3 2. Introduction: Hermeneutics 5 - 6 3. Heidegger: Understanding As An Existenzial 7 - 26 4. Gadamer: The Problem Of Application And The Hermeneutical Concept Of Experience 4

Amsterdam, University of

424

Database System Concepts, 5th Ed. Silberschatz, Korth and Sudarshan  

E-Print Network [OSTI]

Overall Structure History of Database Systems #12;©Silberschatz, Korth and Sudarshan1.3Database SystemDatabase System Concepts, 5th Ed. ©Silberschatz, Korth and Sudarshan See www, Korth and Sudarshan1.2Database System Concepts - 5th Edition, May 23, 2005 Chapter 1: Introduction

Dragan, Feodor F.

425

Formalizing Concepts for Efficacy-aware Business Process Modeling  

E-Print Network [OSTI]

Formalizing Concepts for Efficacy-aware Business Process Modeling Matthias Lohrmann and Manfred.lohrmann,manfred.reichert}@uni-ulm.de Abstract. In business process design, business objective models can ful- fill the role of formal business process management concepts yet. Moreover, process models are currently not sufficiently

Ulm, Universität

426

Project management process ontologies: a proof of concept  

E-Print Network [OSTI]

to be familiar. #12;A large number of written procedures incurs the risk that project progress is slowed becauseProject management process ontologies: a proof of concept Robert T. Hughes Department of Computing of representing project management processes as ontologies. The proof of concept is the creation of a prototype

Winstanley, Graham

427

Supporting Creative Concept Generation by Engineering Students with Biomimetic Design  

E-Print Network [OSTI]

Supporting Creative Concept Generation by Engineering Students with Biomimetic Design Hyunmin the analogical transfer tools we developed affected engineering students in generating creative concepts. We of Mechanical and Industrial Engineering, University of Toronto 5 King's College Road, Toronto, ON, M5S 3G8

Shu, Lily H.

428

Database System Concepts, 5th Ed. Silberschatz, Korth and Sudarshan  

E-Print Network [OSTI]

Database System Concepts, 5th Ed. ©Silberschatz, Korth and Sudarshan See www and Sudarshan2.2Database System Concepts - 5th Edition, Oct 5, 2006 Chapter 2: Relational ModelChapter 2: Relational Model Structure of Relational Databases Fundamental Relational-Algebra-Operations Additional

Dragan, Feodor F.

429

Database System Concepts, 5th Ed. Silberschatz, Korth and Sudarshan  

E-Print Network [OSTI]

Database System Concepts, 5th Ed. ©Silberschatz, Korth and Sudarshan See www.2Database System Concepts, 5th Edition, Oct 5. 2006 Chapter 4: Advanced SQLChapter 4: Advanced SQL SQL Data Constructs** Recursive Queries** Advanced SQL Features** #12;©Silberschatz, Korth and Sudarshan4.3Database

Dragan, Feodor F.

430

Database System Concepts, 5th Ed. Silberschatz, Korth and Sudarshan  

E-Print Network [OSTI]

Database System Concepts, 5th Ed. ©Silberschatz, Korth and Sudarshan See www;©Silberschatz, Korth and Sudarshan6.2Database System Concepts - 5th Edition, Oct 5, 2006 Chapter 6: Entity Design Issues Weak Entity Sets Extended E-R Features Design of the Bank Database Reduction to Relation

Dragan, Feodor F.

431

Database System Concepts, 5th Ed. Silberschatz, Korth and Sudarshan  

E-Print Network [OSTI]

Database System Concepts, 5th Ed. ©Silberschatz, Korth and Sudarshan See www.db-book.com for conditions on re-use Chapter 7: Relational Database DesignChapter 7: Relational Database Design #12;©Silberschatz, Korth and Sudarshan7.2Database System Concepts - 5th Edition, Oct 5, 2006 Chapter 7: Relational

Dragan, Feodor F.

432

Integrated autothermal reactor concepts for oxidative coupling and reforming of  

E-Print Network [OSTI]

#12;Integrated autothermal reactor concepts for oxidative coupling and reforming of methane #12-90-365-2985-3, DOI 10.3990/1.9789036529853 #12;INTEGRATED AUTOTHERMAL REACTOR CONCEPTS FOR OXIDATIVE COUPLING . . . . . . . . . . . . . . . . . . . . 31 2.5 Dual function catalyst particle . . . . . . . . . . . . . . . . . . . . . . 34 2.6 Autothermal

Twente, Universiteit

433

Photovoltaic Pumping Systems A Comparison of Two Concepts  

E-Print Network [OSTI]

Photovoltaic Pumping Systems A Comparison of Two Concepts Hans Bloos, Markus Genthner, Detlev of Oldenburg two different concepts of photovoltaic pumping subsystems available on the market were Photovoltaic pumping (PVP) has established itself as a water lifting technique for remote areas in sun

Heinemann, Detlev

434

Lessons Learned in Applying Formal Concept Analysis to Reverse Engineering  

E-Print Network [OSTI]

Lessons Learned in Applying Formal Concept Analysis to Reverse Engineering Gabriela Ar´evalo, St in "International Conference on Formal Concept Analysis (ICFCA '05) (2005)" #12;Lessons Learned in Applying Formal artifacts. In this paper we describe our approach, outline three case studies, and draw various lessons from

Paris-Sud XI, Université de

435

ARR/April 8, 2008 Magnetic Intervention Dump Concepts  

E-Print Network [OSTI]

for us in designing a liquid Pb dump at bottom New Inverted Martini Glass Cusp Concept (From B. Robson) #12;ARR/April 8, 2008 5 Better to Use Inverted Burgundy Glass Concept (if possible) to Prevent Direct for clean-up - Separate coolant for power removal (e.g. Pb-17Li) · Different liquid Pb configurations

Raffray, A. René

436

Is the New Economy a Useful Concept ? Bernard PAULR *  

E-Print Network [OSTI]

1 Is the New Economy a Useful Concept ? Bernard PAULR� * Université Paris 1 Panthéon Sorbonne of the concept of a New Economy. This construct, which first began to appear in the media in the mid-1990s that is associated with it, express an extremely optimistic view of the future of the U.S. economy, and are best

Boyer, Edmond

437

A System for Epigenetic Concept Development through Autonomous Associative Learning  

E-Print Network [OSTI]

. A concept is an abstract and compact representation of information from multiple sources. This paper environment, to develop an internal sensor that measures the semi-concrete concept of distance traveled that is not necessarily in the self-reflective domain, greatly widening the pool of cognitive systems. This work

Grabowski, Laura M. - Department of Computer Science, University of Texas

438

A Concept of Sustainable Use of Natural Resources  

E-Print Network [OSTI]

A Concept of Sustainable Use of Natural Resources in Regional Development Contexts Sustainable;Sustainable Regional Development in Rural Africa Part III A Concept of Sustainable Use of Natural Resources;Citation Wiesmann U. 2008. Sustainable Regional Development in Rural Africa, Part III: A Con- cept

Richner, Heinz

439

Modified Advection-Aridity Model of Evapotranspiration Jozsef Szilagyi1  

E-Print Network [OSTI]

Modified Advection-Aridity Model of Evapotranspiration Jozsef Szilagyi1 ; Michael T. Hobbins2=empirically derived constant correction factor. Szilagyi 2007 suggested a temperature-dependent expression for b

Szilagyi, Jozsef

440

Modified Ricci flow and asymptotically non-flat spaces  

E-Print Network [OSTI]

The present work extends the application of a modified Ricci flow equation to an asymptotically non flat space, namely Marder's cylindrially symmetric space. It is found that the flow equation has a solution at least in a particular case.

Shubhayu Chatterjee; Narayan Banerjee

2013-04-08T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Modifying Nanotubes Chemistry and Electronics of Carbon Nanotubes  

E-Print Network [OSTI]

Modifying Nanotubes Chemistry and Electronics of Carbon Nanotubes Go Together Ernesto Joselevich* Keywords: chemical reactivity · electronic structure · molecular electronics · nanotechnology · nanotubes yield mixtures of metallic and semi- conducting nanotubes, extensive re- search has been devoted

Joselevich, Ernesto

442

Idaho Application for Permit to Construct Modify or Maintain...  

Open Energy Info (EERE)

LibraryAdd to library Legal Document- RegulationRegulation: Idaho Application for Permit to Construct Modify or Maintain an Injection Well - Form 42-39-1Legal Published NA...

443

TR-031 Ecology March 2004 A modified timber cruise  

E-Print Network [OSTI]

TR-031 Ecology March 2004 A modified timber cruise for the inventory of dead wood in Coastal-751-7001 Research Disciplines: Ecology ~ Geology ~ Geomorphology ~ Hydrology ~ Pedology ~ Silviculture ~ Wildlife 2004 Research Section, Coast Forest Region, BCMOF Research Disciplines: Ecology ~ Geology

444

Incremental concept formation algorithms based on Galois (concept) Appeared in Computational Intelligence (1995), 11(2), 246-267  

E-Print Network [OSTI]

the batch algorithms in most cases. When only the incremental update time is used, the incremental algorithm as a conceptual clustering method since it results in a concept hierarchy. This article presents incremental algorithms for updating the Galois lattice and corresponding graph, resulting in an incremental concept

Godin, Robert

445

NL2603 Free energy The concept of "free energy" is a key concept to characterize physically rel-  

E-Print Network [OSTI]

NL2603 Free energy The concept of "free energy" is a key concept to characterize physically rel of statistical mechanics with energy levels E i of the microstates i, the (Helmholtz) free energy is de#12;ned and #12; is the inverse temperature. Apparently, the free energy is di#11;erent from the internal energy U

Beck, Christian

446

Solar System experiments do not yet veto modified gravity models  

E-Print Network [OSTI]

The dynamical equivalence between modified and scalar-tensor gravity theories is revisited and it is concluded that it breaks down in the limit to general relativity. A gauge-independent analysis of cosmological perturbations in both classes of theories lends independent support to this conclusion. As a consequence, the PPN formalism of scalar-tensor gravity and Solar System experiments do not veto modified gravity, as previously thought.

Valerio Faraoni

2006-07-05T23:59:59.000Z

447

EIS-0407: Amended Notice of Intent to Modify the Scope of the...  

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

Notice of Intent to Modify the Scope of the Environmental Impact Statement Abengoa Refinery Project near Hugoton, Kansas Amended Notice of Intent to Modify the Scope of the...

448

E-Print Network 3.0 - acid modified silica Sample Search Results  

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

the elastic modulus with epoxy loading, for an epoxy- crosslinked, amine-modified silica aerogel. Those... authors argued that the epoxy bridges the neighboring amine- modified...

449

Expansion Joint Concepts for High Temperature Insulation Systems  

E-Print Network [OSTI]

EXPANSION JOINT CONCEPTS FOR HIGH TEMPERATURE INSULATION SYSTEMS Michael R. Harrison Johns-Manville Sales Corporation ";.,' Denver, Colorado ABSTRACT As high temperature steam and process piping expands with heat, joints beg in to open...

Harrison, M. R.

1980-01-01T23:59:59.000Z

450

Transformation of traditional design concepts into contemporary architecture  

E-Print Network [OSTI]

The primary aim of this thesis is to explore the design concepts of traditional architecture in Anamur, Turkey, and to make an attempt to incorporate the design patterns extracted from traditional houses into contemporary ...

Cakmakli, Oruc

1983-01-01T23:59:59.000Z

451

Systems analysis and futuristic designs of advanced biofuel factory concepts.  

SciTech Connect (OSTI)

The U.S. is addicted to petroleum--a dependency that periodically shocks the economy, compromises national security, and adversely affects the environment. If liquid fuels remain the main energy source for U.S. transportation for the foreseeable future, the system solution is the production of new liquid fuels that can directly displace diesel and gasoline. This study focuses on advanced concepts for biofuel factory production, describing three design concepts: biopetroleum, biodiesel, and higher alcohols. A general schematic is illustrated for each concept with technical description and analysis for each factory design. Looking beyond current biofuel pursuits by industry, this study explores unconventional feedstocks (e.g., extremophiles), out-of-favor reaction processes (e.g., radiation-induced catalytic cracking), and production of new fuel sources traditionally deemed undesirable (e.g., fusel oils). These concepts lay the foundation and path for future basic science and applied engineering to displace petroleum as a transportation energy source for good.

Chianelli, Russ; Leathers, James; Thoma, Steven George; Celina, Mathias Christopher; Gupta, Vipin P.

2007-10-01T23:59:59.000Z

452

Geospatial technologies and digital geomorphological mapping: Concepts, issues and research  

E-Print Network [OSTI]

Geospatial technologies and digital geomorphological mapping: Concepts, issues and research Michael visualization was primarily relied upon for analysis, introducing subjectivity and biases with respect and rapidly evolving geospatial technologies. Consequently, new capabilities exist but numerous issues have

James, L. Allan

453

Architectural Approaches, Concepts and Methodologies of Service Oriented Architecture  

E-Print Network [OSTI]

Architectural Approaches, Concepts and Methodologies of Service Oriented Architecture Master Thesis. Introduction to Service Oriented Architecture........................................... 2.1 Evolution Middleware (MOM)........................................... 2.5 Definition of Service Oriented Architecture

Moeller, Ralf

454

Texas agricultural science teachers' perceptions of the FFA leadership concepts  

E-Print Network [OSTI]

in conjunction with leadership concepts from the National FFA Essential Learnings Project. The study's final objective was to assess leadership development needed by high school students upon entrance to higher education institutions and/or the workforce...

King, Elizabeth Michelle Baldwin

2003-01-01T23:59:59.000Z

455

Modelling pitch accents for concept-to-speech synthesis.   

E-Print Network [OSTI]

This paper addresses the problem of generating a full range of appropriate intonation contours for concept-to-speech synthesis systems where there is a specific requirement to produce different semantic meanings and ...

Clark, Robert A J

2003-01-01T23:59:59.000Z

456

Generating Tensor Representation from Concept Tree in Meaning Based Search  

E-Print Network [OSTI]

to a representation that can be stored and compared efficiently on computers. Meaning of objects can be adequately captured in terms of a hierarchical composition structure called concept tree. This thesis describes the design and development...

Panigrahy, Jagannath

2011-08-08T23:59:59.000Z

457

Concept drift learning and its application to adaptive information filtering  

E-Print Network [OSTI]

is generally difficult. The second part presents a computational Framework for Extending Incomplete Labeled Data Stream (FEILDS). The system modularly extends the capability of an existing concept drift learner in dealing with incomplete labeled data stream...

Widyantoro, Dwi Hendratmo

2004-09-30T23:59:59.000Z

458

ECOLOGICAL DIVERSITY AND BIODIVERSITY AS CONCEPTS FOR CONSERVATION PLANNING  

E-Print Network [OSTI]

ECOLOGICAL DIVERSITY AND BIODIVERSITY AS CONCEPTS FOR CONSERVATION PLANNING: COMMENTS ON RICOTTA Sahotra Sarkar Biodiversity and Biocultural Conservation Laboratory, Section of Integrative Biology of measures of biodiversity which can be used for systematic conservation planning. Moreover, these measures

Sarkar, Sahotra

459

ao concept study: Topics by E-print Network  

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

spectrograph instrument concept for the E-ELT, relying on a distributed Adaptive Optics, so-called Multi Object Adaptive Optics. This paper presents the results of a phase A...

460

NightCool: An Innovative Residential Nocturnal Radiation Cooling Concept  

E-Print Network [OSTI]

) will store sensible cooling to reduce daytime space conditioning needs. The concept may also be able to help with daytime heating needs in cold climates as well by using a darker roof as a solar collector. SIMULATION MODEL Within the assessment, we...NIGHTCOOL: AN INNOVATIVE RESIDENTIAL NOCTURNAL RADIATION COOLING CONCEPT Danny S. Parker John Sherwin Principal Research Scientist Research Engineer Florida Solar Energy Center Cocoa, FL ABSTRACT Using a...

Parker, D. S.

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Innovative Design Concept for the New Bangkok International Airport, NBIA  

E-Print Network [OSTI]

using photovoltaic modules covering a surface area of 55,000 m? for the immediate generation of electric power in combination with an electrically powered compression chiller system was compared to other concepts under the aspect of economy. Fig. 17... to costs for environmentally friendly systems, optimized innovative concepts using thermal solar collectors should be given preference over systems using photovoltaics technology. DESIGN - TEAM Architects: Murphy / Jahn Architects, Chicago Project...

Kessling, W.; Holst, S.; Schuler, M.

2004-01-01T23:59:59.000Z

462

Post-Doctoral Researcher's Conceptions of Research: A Metaphor Analysis  

E-Print Network [OSTI]

countries. Fields of research were mathematics (1 participant), physics (2), chemistry (2), earth sciences (2), engineering (3), biological sciences (2), agriculture (3), health sciences (4), social sciences (1) and humanities (2). The number of years as a... or between academics and non-academic staff or students, can cause misunderstandings that prejudice the communication between the people involved. It is the conception of research that is important in the communication process. Conceptions of research have...

Pitcher, Rod; Akerlind, Gerlese

2009-01-01T23:59:59.000Z

463

Contextualizing Concepts using a Mathematical Generalization of the Quantum Formalism  

E-Print Network [OSTI]

We outline the rationale and preliminary results of using the State Context Property (SCOP) formalism, originally developed as a generalization of quantum mechanics, to describe the contextual manner in which concepts are evoked, used, and combined to generate meaning. The quantum formalism was developed to cope with problems arising in the description of (1) the measurement process, and (2) the generation of new states with new properties when particles become entangled. Similar problems arising with concepts motivated the formal treatment introduced here. Concepts are viewed not as fixed representations, but entities existing in states of potentiality that require interaction with a context--a stimulus or another concept--to 'collapse' to an instantiated form (e.g. exemplar, prototype, or other possibly imaginary instance). The stimulus situation plays the role of the measurement in physics, acting as context that induces a change of the cognitive state from superposition state to collapsed state. The collapsed state is more likely to consist of a conjunction of concepts for associative than analytic thought because more stimulus or concept properties take part in the collapse. We provide two contextual measures of conceptual distance--one using collapse probabilities and the other weighted properties--and show how they can be applied to conjunctions using the pet fish problem

Liane Gabora; Diederik Aerts

2004-08-06T23:59:59.000Z

464

Contextualizing concepts using a mathematical generalization of the quantum formalism  

E-Print Network [OSTI]

We outline the rationale and preliminary results of using the state context property (SCOP) formalism, originally developed as a generalization of quantum mechanics, to describe the contextual manner in which concepts are evoked, used and combined to generate meaning. The quantum formalism was developed to cope with problems arising in the description of (i) the measurement process, and (ii) the generation of new states with new properties when particles become entangled. Similar problems arising with concepts motivated the formal treatment introduced here. Concepts are viewed not as fixed representations, but entities existing in states of potentiality that require interaction with a context-a stimulus or another concept-to 'collapse' to an instantiated form (e.g. exemplar, prototype, or other possibly imaginary instance). The stimulus situation plays the role of the measurement in physics, acting as context that induces a change of the cognitive state from superposition state to collapsed state. The collapsed state is more likely to consist of a conjunction of concepts for associative than analytic thought because more stimulus or concept properties take part in the collapse. We provide two contextual measures of conceptual distance-one using collapse probabilities and the other weighted properties-and show how they can be applied to conjunctions using the pet fish problem.

Liane Gabora; Diederik Aerts

2013-11-01T23:59:59.000Z

465

Impedimetric investigation of gold nanoparticles - guanine modified electrode  

SciTech Connect (OSTI)

In this paper we report the preparation of a modified electrode with gold nanoparticles and guanine. The colloidal suspension of gold nanoparticles was obtained by Turkevich method and was next analyzed by UV-Vis spectroscopy and Transmission Electron Microscopy (TEM). The gold electrode was modified by self-assembling the gold nanoparticles with guanine, the organic molecule playing also the role of linker. The electrochemical characteristics of the bare and modified electrode were investigated by Electrochemical Impedance Spectroscopy (EIS). A theoretical model was developed based on an electrical equivalent circuit which contain solution resistance (R{sub s}), charge transfer resistance (R{sub ct}), Warburg impedance (Z{sub W}) and double layer capacitance (C{sub dl})

Vulcu, A.; Pruneanu, S.; Berghian-Grosan, C.; Olenic, L. [National Institute for Research and Development of Isotopic and Molecular Technologies, Cluj-Napoca (Romania)] [National Institute for Research and Development of Isotopic and Molecular Technologies, Cluj-Napoca (Romania); Muresan, L. M. [Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca (Romania)] [Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca (Romania); Barbu-Tudoran, L. [Faculty of Biology and Geology, Babes-Bolyai University, Cluj-Napoca (Romania)] [Faculty of Biology and Geology, Babes-Bolyai University, Cluj-Napoca (Romania)

2013-11-13T23:59:59.000Z

466

ANALYSIS OF OUT OF DATE MCU MODIFIER LOCATED IN SRNL  

SciTech Connect (OSTI)

SRNL recently completed density measurements and chemical analyses on modifier samples stored in drums within SRNL. The modifier samples date back to 2008 and are in various quantities up to 40 gallons. Vendor information on the original samples indicates a shelf life of 5 years. There is interest in determining if samples that have been stored for more than the 5 year shelf life are still acceptable for use. The Modular Caustic Side Solvent Extraction Unit (MCU) Solvent component Cs-7SB [(2,2,3,3- tetraflouropropoxy)-3-(4-sec-butylphenoxy)-2-propanol, CAS #308362-88-1] is used as a diluent modifier to increase extractant solubility and provide physical characteristics necessary for diluent trimming.

Crawford, C.

2014-10-22T23:59:59.000Z

467

Method of detecting luminescent target ions with modified magnetic microspheres  

DOE Patents [OSTI]

This invention provides methods of using modified magnetic microspheres to extract target ions from a sample in order to detect their presence in a microfluidic environment. In one or more embodiments, the microspheres are modified with molecules on the surface that allow the target ions in the sample to form complexes with specific ligand molecules on the microsphere surface. In one or more embodiments, the microspheres are modified with molecules that sequester the target ions from the sample, but specific ligand molecules in solution subsequently re-extract the target ions from the microspheres into the solution, where the complexes form independent of the microsphere surface. Once the complexes form, they are exposed to an excitation wavelength light source suitable for exciting the target ion to emit a luminescent signal pattern. Detection of the luminescent signal pattern allows for determination of the presence of the target ions in the sample.

Shkrob, Ilya A; Kaminski, Michael D

2014-05-13T23:59:59.000Z

468

Statistics of Velocity from Spectral Data: Modified Velocity Centroids  

E-Print Network [OSTI]

We address the problem of studying interstellar turbulence using spectral line data. We find a criterion when the velocity centroids may provide trustworthy velocity statistics. To enhance the scope of centroids applications, we construct a measure that we term ``modified velocity centroids'' (MVCs) and derive an analytical solution that relates the 2D spectra of the modified centroids with the underlying 3D velocity spectrum. We test our results using synthetic maps constructed with data obtained through simulations of compressible magnetohydrodynamical (MHD) turbulence. We show that the modified velocity centroids (MVCs) are complementary to the the Velocity Channel Analysis (VCA) technique. Employed together, they make determining of the velocity spectral index more reliable and for wider variety of astrophysical situations.

A. Lazarian; A. Esquivel

2003-06-10T23:59:59.000Z

469

The modified equation for spinless particles and superalgebra  

SciTech Connect (OSTI)

In this paper we consider modified wave equations for spinless particles in an external magnetic field. We consider 4-potentials which guarantee Lorentz' and Coulomb's conditions. The new variable for modified wave equation leads us to consider the associated Laguerre differential equation. We take advantage of the factorization method in Laguerre differential equation and solve the modified equation. In order to obtain the wave function, energy spectrum and its quantization, we will establish conditions for the orbital quantum number. We account such orbital quantum number and obtain the raising and lowering operators. If we want to have supersymmetry partners, we need to apply the shape invariance condition. This condition for the partner potential will help us find the limit of ? as ?=±?(l)

Sadeghi, J.; Rostami, M. [Department of Physics, Islamic Azad University, Ayatollah Amoli Branch, P.O. Box 678, Amol (Iran, Islamic Republic of)] [Department of Physics, Islamic Azad University, Ayatollah Amoli Branch, P.O. Box 678, Amol (Iran, Islamic Republic of); Sadeghi, Z. [Young Researchers Club, Islamic Azad University, Ayatollah Amoli Branch, Amol (Iran, Islamic Republic of)] [Young Researchers Club, Islamic Azad University, Ayatollah Amoli Branch, Amol (Iran, Islamic Republic of)

2013-09-15T23:59:59.000Z

470

Differentiating Between Modified Gravity Theories in the Solar System  

E-Print Network [OSTI]

Building on previous work, we re-examine the possibility of testing MOdified Newtonian Dynamics near the saddle points of gravitational potentials in the Solar System, through an extension of the forthcoming LISA Pathfinder mission. We extend present analysis to include quasi-linear formulations of these theories, resulting from fully relativistic modified gravity theories. Using similar quantitative and qualitative tools, we demonstrate that in general, both the instrumental response and typical Signal to Noise Ratios for such a test will be different. Finally we investigate constraints from a negative result and parameterised free functions.

Ali Mozaffari

2014-03-21T23:59:59.000Z

471

Method for modifying trigger level for adsorber regeneration  

DOE Patents [OSTI]

A method for modifying a NOx adsorber regeneration triggering variable. Engine operating conditions are monitored until the regeneration triggering variable is met. The adsorber is regenerated and the adsorbtion efficiency of the adsorber is subsequently determined. The regeneration triggering variable is modified to correspond with the decline in adsorber efficiency. The adsorber efficiency may be determined using an empirically predetermined set of values or by using a pair of oxygen sensors to determine the oxygen response delay across the sensors.

Ruth, Michael J.; Cunningham, Michael J.

2010-05-25T23:59:59.000Z

472

Modified dynamics of weakly coupled BEC's Josephson Junction (BJJ)  

E-Print Network [OSTI]

The tunnelling quantum dynamics of bimodal BJJ system is modified through introducing an equilibrium condition, which is based on the assumption that the BJJ is tend to keep on its ground state (with a lowest energy) during the oscillation. The tunnelling dynamics of BJJ with symmetric and asymmetric traps is discussed through numerically solving the modified equations. Stationary states are found to exist in the both BJJs. Compared to previous works, the macroscopic quantum self trapping (MQST) is auto-avoided. Meanwhile, it is revealed that the BJJ oscillates with its inherent frequency which is only related to the Josephson energy, which has been testified experimentally in other contexts.

Yu-ping Huang; Zhen-sheng Yuan; Lin-fan Zhu; Lin-jiao Luo; Xiao-jing Liu; Ke-zun Xu

2003-09-01T23:59:59.000Z

473

Miniature modified Faraday cup for micro electron beams  

DOE Patents [OSTI]

A micro beam Faraday cup assembly includes a refractory metal layer with an odd number of thin, radially positioned traces in this refractory metal layer. Some of the radially positioned traces are located at the edge of the micro modified Faraday cup body and some of the radially positioned traces are located in the central portion of the micro modified Faraday cup body. Each set of traces is connected to a separate data acquisition channel to form multiple independent diagnostic networks. The data obtained from the two diagnostic networks are combined and inputted into a computed tomography algorithm to reconstruct the beam shape, size, and power density distribution.

Teruya, Alan T. (Livermore, CA); Elmer, John W. (Danville, CA); Palmer, Todd A. (Livermore, CA); Walton, Chris C. (Berkeley, CA)

2008-05-27T23:59:59.000Z

474

Effect of optically modified polyethylene terephthalate fiber socks on chronic foot pain  

E-Print Network [OSTI]

of optically modified polyethylene terephthalate fiber sockswhether socks made from polyethylene terephthalate (PET)

York, Robyn MB; Gordon, Ian L

2009-01-01T23:59:59.000Z

475

LANL/PNNL Virtual Center for Chemical Hydrides and New Concepts...  

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

LANLPNNL Virtual Center for Chemical Hydrides and New Concepts for Hydrogen Storage LANLPNNL Virtual Center for Chemical Hydrides and New Concepts for Hydrogen Storage...

476

E-Print Network 3.0 - advanced system concepts Sample Search...  

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

concepts Search Powered by Explorit Topic List Advanced Search Sample search results for: advanced system concepts Page: << < 1 2 3 4 5 > >> 1 Analysis and Processing on the...

477

E-Print Network 3.0 - advanced concept technology Sample Search...  

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

concept technology Search Powered by Explorit Topic List Advanced Search Sample search results for: advanced concept technology Page: << < 1 2 3 4 5 > >> 1 MIT LINCOLN LABORATORY...

478

E-Print Network 3.0 - advanced control concept Sample Search...  

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

concept Search Powered by Explorit Topic List Advanced Search Sample search results for: advanced control concept Page: << < 1 2 3 4 5 > >> 1 MIT LINCOLN LABORATORY ORGANIZATION OF...

479

A Modified Reactive Control Framework for Cooperative Mobile Robots  

E-Print Network [OSTI]

A Modified Reactive Control Framework for Cooperative Mobile Robots J. Salido a , J.M. Dolan a , J Dept. of Electrical & Computer Engineering, Carnegie Mellon Univ. Pittsburgh, PA 15213­3890 USA. Purely reactive approaches such as that of Brooks are efficient, but lack a mechanism for global control

480

A test of Taylor- and modified Taylor-expansion  

E-Print Network [OSTI]

We compare Taylor expansion and a modified variant of Taylor expansion, which incorporates features of the fugacity series, for expansions in the chemical potential around a zero-density lattice field theory. As a first test we apply both series to the cases of free fermions and free bosons. Convergence and other properties are analyzed.

Max Wilfling; Christof Gattringer

2014-04-08T23:59:59.000Z

Note: This page contains sample records for the topic "modified microgrid concept" 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

Computer software engineers design, create, and modify computer applications.  

E-Print Network [OSTI]

Computer software engineers design, create, and modify computer applications. Computer Software Engineers (0*NET 15-1031.00, 15-1032.00) Significant Points Computer software engineers are projected are expected for college graduates with at least a bachelor's degree in computer engineering or computer

482

SHORT COMMUNICATION Flow rate-modified streaming effects in heterogeneous  

E-Print Network [OSTI]

the streaming potential (Norde and Rouwendal 1990; Elgersma et al. 1992; Werner et al. 1999) or streamingSHORT COMMUNICATION Flow rate-modified streaming effects in heterogeneous microchannels Junjie Zhu relations is developed to study the streaming potential and streaming current in heterogeneous micro

Xuan, Xiangchun "Schwann"

483

FRW Cosmological model with Modified Chaplygin Gas and Dynamical System  

E-Print Network [OSTI]

The Friedmann-Robertson-Walker(FRW) model with dynamical Dark Energy(DE) in the form of modified Chaplygin gas(MCG) has been investigated. The evolution equations are reduced to an autonomous system on the two dimensional phase plane and it can be interpreted as the motion of the particle in an one dimensional potential.

Nairwita Mazumder; Ritabrata Biswas; Subenoy Chakraborty

2011-06-23T23:59:59.000Z

484

Composition and biological degradability of lignin modified transgenic plants  

E-Print Network [OSTI]

Composition and biological degradability of lignin modified transgenic plants MA Bernard Vailhé, JM The influence of lignin quality on cell wall degradation was studied using, as model plants, control (C matter (DM) and lignin content were determined according to Jarrige (1961, Ann Biol Anim Biophys, 1, 163

Paris-Sud XI, Université de

485

On the test of the modified BCS at finite temperature  

E-Print Network [OSTI]

The results and conclusions by Ponomarev and Vdovin [Phys. Rev. C {\\bf 72}, 034309 (2005)] are inadequate to judge the applicability of the modified BCS because they were obtained either in the temperature region, where the use of zero-temperature single-particle spectra is no longer justified, or in too limited configuration spaces.

Nguyen Dinh Dang; Akito Arima

2005-10-03T23:59:59.000Z

486

Symmetric Achromatic Low-Beta Collider Interaction Region Design Concept  

SciTech Connect (OSTI)

We present a new symmetry-based concept for an achromatic low-beta collider interaction region design. A specially-designed symmetric Chromaticity Compensation Block (CCB) induces an angle spread in the passing beam such that it cancels the chromatic kick of the final focusing quadrupoles. Two such CCB?s placed symmetrically around an interaction point allow simultaneous compensation of the 1st-order chromaticities and chromatic beam smear at the IP without inducing significant 2nd-order aberrations. We first develop an analytic description of this approach and explicitly formulate 2nd-order aberration compensation conditions at the interaction point. The concept is next applied to develop an interaction region design for the ion collider ring of an electron-ion collider. We numerically evaluate performance of the design in terms of momentum acceptance and dynamic aperture. The advantages of the new concept are illustrated by comparing it to the conventional distributed-sextupole chromaticity compensation scheme.

Morozov, Vasiliy S. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Derbenev, Yaroslav S. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Lin, Fanglei [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Johnson, Rolland P. [Muons, Inc., Batavia, IL (United States)

2013-01-01T23:59:59.000Z

487

Water-cooled solid-breeder blanket concept for ITER  

SciTech Connect (OSTI)

A water cooled solid-breeder blanket concept was developed for ITER. The main function of this blanket is to produce the necessary tritium for the ITER operation. Several design features are incorporated in this blanket concept to increase its attractiveness. The main features are the following: (a) a multilayer concept which reduces fabrication cost; (b) a simple blanket configuration which results in reliability advantages; (c) a very small breeder volume is employed to reduce the tritium inventory and the blanket cost; (d) a high tritium breeding ratio eliminates the need for an outside tritium supply; (e) a low-pressure system decreases the required steel fraction for structural purposes; (f) a low-temperature operation reduces the swelling concerns for beryllium; and (g) the small fractions of structure and breeder materials used in the blanket reduce the decay heat source. The key features and design analyses of this blanket are summarized in this paper.

Gohar, Y.; Baker, C.C.; Attaya, H.; Billone, M.; Clemmer, R.C.; Finn, P.A.; Hassanein, A.; Johnson, C.E.; Majumdar, S.; Mattas, R.F.

1989-03-01T23:59:59.000Z

488

Systems engineering analysis of kinetic energy weapon concepts  

SciTech Connect (OSTI)

This study examines, from a systems engineering design perspective, the potential of kinetic energy weapons being used in the role of a conventional strategic weapon. Within the Department of Energy (DOE) complex, strategic weapon experience falls predominantly in the nuclear weapons arena. The techniques developed over the years may not be the most suitable methodologies for use in a new design/development arena. For this reason a more fundamental approach was pursued with the objective of developing an information base from which design decisions might be made concerning the conventional strategic weapon system concepts. The study examined (1) a number of generic missions, (2) the effects of a number of damage mechanisms from a physics perspective, (3) measures of effectiveness (MOE`s), and (4) a design envelope for kinetic energy weapon concepts. With the base of information a cut at developing a set of high-level system requirements was made, and a number of concepts were assessed against these requirements.

Senglaub, M.

1996-06-01T23:59:59.000Z

489

Status of Overseas Microgrid Programs: Microgrid Research Activities in the U.S.  

E-Print Network [OSTI]

also co-funded with General Electric a second separate two-and at its facility, General Electric aims to develop and

Marnay, Chris

2008-01-01T23:59:59.000Z

490

Status of Overseas Microgrid Programs: Microgrid Research Activities in the U.S.  

E-Print Network [OSTI]

?? IEEEP1547.4 ??? ?????????? EPS?Electric Power System? ????????? EPS ????????????? EPS ?????????????????EPS ??????? ????EPS ???????????

Marnay, Chris

2008-01-01T23:59:59.000Z

491

Status and Prospects of the Fast Ignition Inertial Fusion Concept  

SciTech Connect (OSTI)

Fast ignition is an alternate concept in inertial confinement fusion, which has the potential for easier ignition and greater energy multiplication. If realized it could improve the prospects for inertial fusion energy. It poses stimulating challenges in science and technology and the research is approaching a key stage in which the feasibility of fast ignition will be determined. This review covers the concepts, the state of the science and technology, the near term prospects and the challenges and risks involved in demonstrating high gain fast ignition.

Key, M H

2006-11-15T23:59:59.000Z

492

The Inductrack concept: A new approach to magnetic levitation  

SciTech Connect (OSTI)

This report describes theoretical and experimental investigations of a new approach to the problem of the magnetic levitation of a moving object. By contrast with previously studied levitation approaches, the Inductrack concept concept represents a simpler, potentially less expensive, and totally passive means of levitating a high-speed train. It may also be applicable to other areas where simpler magnetic levitation systems are needed, for example, high-speed test sleds for crash testing applications, or low-friction conveyer systems for industrial use.

Post, R.F.; Ryutov, D.

1996-05-01T23:59:59.000Z

493

Exploration concept and characteristic of the dinarides stratigraphic and structural model in the Croatian offshore area  

SciTech Connect (OSTI)

The Dinarides Mesozoic carbonate platform constitutes an extensive paleogeographic unit of the Neo-Tethys platform system. Despite a large sedimentary complex within the platform displaying good hydrocarbon potential, no economic oil accumulations have as yet been discovered. A detailed study of the latest seismic and well data from the Kornati block and other relevant areas suggests, however, that a modified exploration scenario, based on the following elements, could be proposed: (1) Systematic lateral distribution of potential petroliferous facies between the Istrian-Dalmatian marginal zones and the central zone of the external Dinarides. Also, evidence of regular facies changes during platform evolution. (2) Paleotectonic control of varying depositional environments. These range from extremely restricted (anoxic) conditions, to high-energy zones on the platform margins and the edges of intraplatform basins and lagoons. (3) A link between the structural style of the final platform carbonates and the underlying Permian-Triassic halokinetic deposits. This relationship occurred during the Apulia microplate collision and shearing. (4) Differential platform subsidence and burial of potential source rock during platform evolution. Also, post-platform flysch and Molasse sedimentation. (5) Rotational displacement of potential hydrocarbon reservoirs away from the conventional target of exploratory drilling. An acceptance of the above-mentioned elements, particularly the rotation concept, could contribute toward developing a more effective exploration strategy. This should involve seismostratigraphic and other refined exploration methods in many zones of the Neo-Tethys carbonate platform system characterized by similar rotational displacement.

Grandic, S. (Western Geophysical, Isleworth, Middlesex (United Kingdom)); Susterciv, M.; Balas, E. (Ina-Naftaplin, Zagreb (Croatia))

1993-09-01T23:59:59.000Z

494

Assessment of a multi-stage underwater vehicle concept using a fossil-fuel Stirling engine  

SciTech Connect (OSTI)

The Stirling Engine because of its inherent closed-cycle operation can be readily modified to work in an airless environment even if the primary source of energy is a fossil fuel. Thus, Stirling engines are well suited for use in the underwater environment and have been operated successfully in manned military submarines since the early 1980s. In recent years fossil fueled Stirling systems have been also proposed for use in small unmanned underwater vehicles (UUVs). However, in this case the need to carry an onboard oxygen supply in a very confined space has presented a number of design difficulties. These are identified in the paper. However, if the oxidant supply to the engine is provided by the membrane extraction of dissolved oxygen from seawater and/or disposable fuel/oxidant pods are used then the UUV Stirling system becomes more attractive. If this latter concept is extended to include multi-stage vehicles then it can be shown that fossil fueled Stirlings could also be put to effective use in long range-long endurance underwater vehicular operations.

Reader, G.T.; Potter, I.J. [Univ. of Calgary, Alberta (Canada). Dept. of Mechanical Engineering

1995-12-31T23:59:59.000Z

495

PRISM: Concept-preserving Social Image Search Results Summarization  

E-Print Network [OSTI]

PRISM: Concept-preserving Social Image Search Results Summarization Boon-Siew Seah seah0097@ntu.edu.sg Sourav S Bhowmick assourav@ntu.edu.sg Aixin Sun axsun@ntu.edu.sg School of Computer Engineering, Nanyang study, we demonstrate the effectiveness of prism against state-of- the-art image summarization

Aixin, Sun

496

Crypto-Based Identifiers (CBIDs): Concepts and Applications  

E-Print Network [OSTI]

Crypto-Based Identifiers (CBIDs): Concepts and Applications GABRIEL MONTENEGRO Sun Labs, Europe of this material appeared in G. Montenegro and C. Castelluccia, "Statistically Unique and Cryptographically Security Conference (NDSS02), San Diego, February 2002. Authors' addresses: G. Montenegro, Sun Labs, Europe

Castelluccia, Claude

497

Privacy Enhancing Technology Concepts for RFID Technology Scrutinised  

E-Print Network [OSTI]

Privacy Enhancing Technology Concepts for RFID Technology Scrutinised Jan E. Hennig, Peter B)using RFID technology for tracking and profiling individual people. Privacy, data security and civil rights and compile a checklist against which we com- pare proposals to enhance RFID technology to gain privacy

Ladkin, Peter B.

498

1 INSTRODUCTION In the concept of geological radioactive waste disposal,  

E-Print Network [OSTI]

1 INSTRODUCTION In the concept of geological radioactive waste disposal, argillite is being of the radioactive waste disposal, the host rock will be subjected to various thermo-hydro-mechanical loadings, thermal solicitation comes from the heat emitting from the radioactive waste packages. On one hand

Boyer, Edmond

499

Project Management and Analysis Project Conception and Execution  

E-Print Network [OSTI]

TD 608 Project Management and Analysis Part I Project Conception and Execution Milind Sohoni of the paper? How does the author compare India and Pakistan? Do you agree with the cost-benefit analysis? What are your criticisms? Compare the CBA with our 6-goat system. Comment on the viability of the project

Sohoni, Milind

500

Project Management and Analysis Project Conception and Execution  

E-Print Network [OSTI]

by the World Bank at a cost of $ 600,000. The objectives of the project are: Analyze the supply and demandTD 608 Project Management and Analysis Part I Project Conception and Execution Milind Sohoni Discussion () January 29, 2008 1 / 3 #12;The K-East Ward Water Project Proceed to the web location: www

Sohoni, Milind