Sample records for modified microgrid concept

  1. Advanced concepts for controlling energy surety microgrids.

    SciTech Connect (OSTI)

    Menicucci, David F.; Ortiz-Moyet, Juan

    2011-05-01T23:59:59.000Z

    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.

  2. Validation of the CERTS Microgrid Concept The CEC/CERTS MicrogridTestbed

    SciTech Connect (OSTI)

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

    2006-06-01T23:59:59.000Z

    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

  3. 1 Validation of the CERTS Microgrid Concept

    E-Print Network [OSTI]

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

    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

  4. Integration of Distributed Energy The CERTS MicroGrid Concept

    E-Print Network [OSTI]

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

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

    E-Print Network [OSTI]

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

    2006-01-01T23:59:59.000Z

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

  6. Microgrids

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport(FactDepartment3311, 3312),Microgrid Workshop Report August 2011 Microgrid

  7. Microgrids

    E-Print Network [OSTI]

    Robert H. Lasseter

    2002-01-01T23:59:59.000Z

    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

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

    E-Print Network [OSTI]

    Collins, Emmanuel

    1 Abstract ­ Microgrids are a new concept for future energy dis- tribution systems that enable renewable energy integration and improved energy management capability. Microgrids consist of multiple power quality and power distribution reliability, microgrids need to operate in both grid

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

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    and reliability ·Integrating distributed power generation and storage ·Utilizing renewable energy resources1 1 Abstract-- The concept of microgrid hierarchical control is presented recently. In this paper comprises distributed generators (DGs) local controllers. The local controllers mainly consist of power

  10. Integration of distributed energy resources. The CERTS Microgrid Concept

    SciTech Connect (OSTI)

    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

    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.

  11. 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...

  12. 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup |JilinLu anMicrogreen Polymers

  13. CERTS Microgrid Laboratory Test Bed

    SciTech Connect (OSTI)

    ETO, J.; LASSETER, R.; SCHENKMAN, B.; STEVENS, J.; KLAPP, D.; VOLKOMMER, H.; LINTON, E.; HURTADO, H.; ROY, J.

    2010-06-08T23:59:59.000Z

    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.

  14. Facility Microgrids

    SciTech Connect (OSTI)

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

    2005-05-01T23:59:59.000Z

    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.

  15. 1 Smart Distribution: Coupled Microgrids

    E-Print Network [OSTI]

    R. H. Lasseter

    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

  16. CERTS Microgrid Laboratory Test Bed

    SciTech Connect (OSTI)

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

    2009-06-18T23:59:59.000Z

    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.

  17. 1 A Centralized Optimal Energy Management System for Microgrids

    E-Print Network [OSTI]

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

    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

  18. 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

  19. Title: Experimental Platform for Novel Distributed Microgrids Control Solutions

    E-Print Network [OSTI]

    Johnson, Eric E.

    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

  20. Hierarchical Control Scheme for Voltage Unbalance Compensation in Islanded Microgrids

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    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

  1. Breaking the Hierarchy: Distributed Control & Economic Optimality in Microgrids

    E-Print Network [OSTI]

    Bullo, Francesco

    genera- tion and energy storage systems, the concept of a microgrid has recently gained popularity [2 generation, storage, load, and managed au- tonomously from the larger transmission network. Microgrids independently. Distributed energy sources in a microgrid generate either DC or variable frequency AC power

  2. Shape of the microgrid

    SciTech Connect (OSTI)

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

    2000-11-01T23:59:59.000Z

    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.

  3. Microgrid cyber security reference architecture.

    SciTech Connect (OSTI)

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

    2013-07-01T23:59:59.000Z

    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.

  4. Microgrid Testing

    SciTech Connect (OSTI)

    Shirazi, M.; Kroposki, B.

    2012-01-01T23:59:59.000Z

    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.

  5. Arnold Schwarzenegger CERTS MICROGRID

    E-Print Network [OSTI]

    Arnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Technical Advisory Committee Microgrid Test Bed Project 30 April 2008 Lawrence Berkeley National Laboratory Building 90 Room 4133 1

  6. Arnold Schwarzenegger CERTS MICROGRID

    E-Print Network [OSTI]

    Arnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Summary of CERTS Microgrid Static Switch Power Quality Tests at AEP Dolan, CERTS Microgrid Static Switch Testing Prepared For of the information in this report. #12;#12;AEP DTC Proposed Test Plan ­ CERTS Micro-grid Static Switch Project

  7. ADAPTIVE NETWORK PROTECTION IN MICROGRIDS

    E-Print Network [OSTI]

    Re Oudalova; Antonio Fidigattib

    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

  8. CERTS Microgrid Laboratory Test Bed

    SciTech Connect (OSTI)

    Lasseter, R. H.; Eto, J. H.; Schenkman, B.; Stevens, J.; Volkmmer, H.; Klapp, D.; Linton, E.; Hurtado, H.; Roy, J.

    2010-06-08T23:59:59.000Z

    CERTS Microgrid concept captures the emerging potential of distributed generation using a system approach. CERTS views generation and associated loads as a subsystem or a 'microgrid'. The sources can operate in parallel to the grid or can operate in island, providing UPS services. The system can disconnect from the utility during large events (i.e. faults, voltage collapses), but may also intentionally disconnect when the quality of power from the grid falls below certain standards. CERTS Microgrid concepts 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 resynchronization 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.

  9. Sandia Energy - Microgrid

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

    ridashoter2015-04-07T21:09:21+00:00 A microgrid is a small-scale version of a centralized electric grid-implemented at a local level. A microgrid can be tied to the larger grid,...

  10. Sandia National Laboratories: Microgrid

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

    Security, Microgrid, News, News & Events, Partnership, Research & Capabilities, SMART Grid The Smart Power Infrastructure Demonstration for Energy Reliability and Security...

  11. Microgrids for Rural Electrification

    E-Print Network [OSTI]

    Microgrids for Rural Electrification: A critical review of best practices based on seven case Electrification Microgrids for Rural Electrification: A critical review of best practices based on seven case Mellon University University of California, Berkeley #12;Microgrids for Rural Electrification i Dan

  12. 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

  13. 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

  14. 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

  15. 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

  16. CERTS Microgrid Laboratory Test Bed - PIER Final Project Report

    SciTech Connect (OSTI)

    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

    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.

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

    E-Print Network [OSTI]

    Bullo, Francesco

    distributed renewable genera- tion and energy storage systems, the concept of a microgrid has recently gained, storage, load, and managed autonomously from the larger transmission network. Microgrids are able. The sources in a microgrid generate either DC or variable frequency AC power, and are interfaced with an AC

  18. Making Microgrids Work

    SciTech Connect (OSTI)

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

    2008-05-01T23:59:59.000Z

    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.

  19. Arnold Schwarzenegger CERTS MICROGRID

    E-Print Network [OSTI]

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

  20. Arnold Schwarzenegger CERTS MICROGRID

    E-Print Network [OSTI]

    Figure 3 - Simplified diagram of Test Bed showing Meter and Relay locations .... 5 Figure 4 - DiagramArnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Test Plan Section 6.0 Microgrid Test Bed System Checkout (Static Switch) Prepared For: California Energy Commission Public Interest

  1. Arnold Schwarzenegger CERTS MICROGRID

    E-Print Network [OSTI]

    Figure 3 - Simplified diagram of Test Bed showing Meter and Relay locations .... 4 Figure 4 - DiagramArnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Test Plan Section 10.0 Difficult in this report. #12;#12;CERTS MICROGRID TEST REPORT SECTION 10.0 "Difficult Load Tests" #12;I Table of Contents 1

  2. Value and Technology Assessment to Enhance the Business Case for the CERTS Microgrid

    SciTech Connect (OSTI)

    Lasseter, Robert; Eto, Joe

    2010-05-15T23:59:59.000Z

    The CERTS Microgrid concept is an advanced approach for enabling integration of, in principle, an unlimited quantity of distributed energy resources into the electricity grid. A key feature of a microgrid, is its ability, during a utility grid disturbance, to separate and isolate itself from the utility seamlessly with no disruption to the loads within the microgrid (including no reduction in power quality). Then, when the utility grid returns to normal, the microgrid automatically resynchronizes and reconnects itself to the grid, in an equally seamless fashion. What is unique about the CERTS Microgrid is that it can provide this technically challenging functionality without extensive (i.e., expensive) custom engineering. In addition, the design of the CERTS Microgrid also provides high system reliability and great flexibility in the placement of distributed generation within the microgrid. The CERTS Microgrid offers these functionalities at much lower costs than traditional approaches by incorporating peer-to-peer and plug-and-play concepts for each component within the Microgrid. The predecessor to the current project involved the construction of and completion of initial testing using the world's first, full-scale, inverter-based, distributed generation test bed. The project demonstrated three advanced techniques, collectively referred to as the CERTS Microgrid concept, which collectively significantly reduce the level of custom field engineering needed to operate microgrids consisting of small generating sources. The techniques 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 both grid and islanded conditions without requiring high-speed communications. The work conducted in this phase of RD&D on the CERTS Microgrid Concept builds upon this base of technical accomplishments to prioritize, develop, and then demonstrate technology enhancements to further enhance the business case for microgrids. That is, having demonstrated the technical feasibility of microgrid functions, RD&D optimization efforts are now needed to accelerate commercial deployment. The current phase is a contribution to these efforts. This project involved seven distinct analysis, bench-, and full-scale testing tasks. The first five tasks were described in the original proposal submitted and awarded through DOE's solicitation. Two additional tasks were added to address issues that had been identified in the earlier, first phase of testing.

  3. CERTS Microgrid Laboratory Test Bed

    E-Print Network [OSTI]

    Lasseter, R. H.

    2010-01-01T23:59:59.000Z

    Roy, Nancy Jo Lewis, “CERTS Microgrid Laboratory Test Bed Report:Appendix K,” http://certs.lbl.gov/CERTS_P_

  4. Online Energy Generation Scheduling for Microgrids with

    E-Print Network [OSTI]

    Zhang, Junshan

    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

  5. Webinar Presentation: Energy Storage Solutions for Microgrids...

    Office of Environmental Management (EM)

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

  6. Arnold Schwarzenegger CERTS MICROGRID

    E-Print Network [OSTI]

    Arnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Test Bed Design Schematics Park Waitsfield, VT 05673 802-496-2955 www.northernpower.com CERTS Test Bed Schematic - PRELIMINARY (including Relay 1) T11 500kVA L11A,B,C CB12 CB13 Feeder C 75 yds cable Load Bank Zone 6 (Sheet 16, 17) A12 B

  7. Arnold Schwarzenegger CERTS MICROGRID

    E-Print Network [OSTI]

    Figure 3 - Simplified diagram of Test Bed showing Meter and Relay locations .... 4 Figure 4 - DiagramArnold Schwarzenegger Governor CERTS MICROGRID LABORATORY TEST BED Test Plan Section 9.0 Power Flow Control Tests Prepared For: California Energy Commission Public Interest Energy Research Program Prepared

  8. Microgrid: A Conceptual Solution

    E-Print Network [OSTI]

    Robert H. Lasseter; Paolo Piagi

    2004-01-01T23:59:59.000Z

    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

  9. 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.

  10. CERTS Microgrid Laboratory Test Bed

    E-Print Network [OSTI]

    Lasseter, R. H.

    2010-01-01T23:59:59.000Z

    inverters, microgrid, CERTS, power vs. frequency droop,voltage droop. The objective of the CERTS Microgridusing a power vs. frequency droop controller. If there is

  11. 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...

  12. System and method for controlling microgrid

    DOE Patents [OSTI]

    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

    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.

  13. Arnold Schwarzenegger CERTS MICROGRID

    E-Print Network [OSTI]

    as a microgrid. Test I_a_i (0KW-30KW step load) Unit #1 Transient Response Unit #2 Transient Response Figure 1 individual inverters in an islanded condition. The data provided in this section depicts step loads Individual Inverter Transient Response 0 ­ 30 kW A (Island) B (Island) Load Bank #1(S.P/Actual) KW 0.0/0.0 KW

  14. Sandia Energy - 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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol Home Distribution Grid Integration Permalink Gallery Mesa del SolMicrogrid Home

  15. Dynamics and challenges of microgrids implementation

    E-Print Network [OSTI]

    Sabhlok, Vikalp Pal

    2013-01-01T23:59:59.000Z

    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 ...

  16. Impact of load type on microgrid stability

    E-Print Network [OSTI]

    Monnin, Jared P

    2012-01-01T23:59:59.000Z

    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 ...

  17. Energy Security: Microgrid Planning and Design (Presentation)

    SciTech Connect (OSTI)

    Giraldez, J.

    2012-05-01T23:59:59.000Z

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

  18. Microgrids: distributed on-site generation

    E-Print Network [OSTI]

    Watson, Andrew

    : · Diversity of the load profile as a function of microgrid size; · Feasibility of accurate control of bothMicrogrids: distributed on-site generation Suleiman Abu-Sharkh, Rachel Li, Tom Markvart, Neil Ross for Climate Change Research Technical Report 22 #12;1 Microgrids: distributed on-site generation Tyndall

  19. 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

  20. Distributed Generation Investment by a Microgrid Under Uncertainty

    E-Print Network [OSTI]

    Siddiqui, Afzal; Marnay, Chris

    2006-01-01T23:59:59.000Z

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

  1. DC Microgrids Scoping Study: Estimate of Technical and Economic...

    Office of Environmental Management (EM)

    ability of microgrids to provide higher reliability and higher power quality than utility power systems and improved energy utilization. The vast majority of these microgrids are...

  2. Energy manager design for microgrids

    SciTech Connect (OSTI)

    Firestone, Ryan; Marnay, Chris

    2005-01-01T23:59:59.000Z

    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.

  3. Microsoft Word - microgrid_for_resilience .docx

    Energy Savers [EERE]

    When grid-connected, microgrids can provide various services, e.g. frequency control support, voltage support, congestion management, reduction of grid losses, and...

  4. Sandia Energy - Energy Surety Microgrid(tm)

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

    surety microgrid is a smaller version of the larger electric grid. It can generate and control electrical power output in a self contained, localized area; thus ensuring that...

  5. Microgrid Dispatch for Macrogrid Peak-Demand Mitigation

    E-Print Network [OSTI]

    DeForest, Nicholas

    2013-01-01T23:59:59.000Z

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

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

    E-Print Network [OSTI]

    Marnay, Chris

    2014-01-01T23:59:59.000Z

    microgrid simulator with multiple power generation units including solar PV, diesel, energy storage,

  7. Multiagent coordination in microgrids via wireless networks

    E-Print Network [OSTI]

    Hao Liang; Atef Abdrabou

    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

  8. Defining control strategies for microgrids islanded operation

    E-Print Network [OSTI]

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

    2006-01-01T23:59:59.000Z

    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

  9. 1 Pricing Games among Interconnected Microgrids

    E-Print Network [OSTI]

    Gaurav S. Kasbekar; Saswati Sarkar

    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

  10. Sandia Energy - 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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Scienceand RequirementsCoatings Initiated at PNNL's Sequim Bay CoatingsBuilding a Microgrid

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

    SciTech Connect (OSTI)

    Dr. Mohammad S. Alam

    2006-03-15T23:59:59.000Z

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

  12. Diploma Thesis Distributed Secondary Control in Microgrids

    E-Print Network [OSTI]

    Bullo, Francesco

    and Droop Control . . . . . . . . . . . . . . . 5 2.2 Notation and Geometric Definitions in AC networks . . . . . . . . . . . . . . . 8 2.5 Droop-Controlled Microgrid of loads and droop-controlled inverters. While the decentralized and proportional primary droop

  13. A Distributed Generation Control Architecture for Islanded AC Microgrids

    E-Print Network [OSTI]

    Dominguez-Garcia, Alejandro

    1 A Distributed Generation Control Architecture for Islanded AC Microgrids Stanton T. Cady, Student architecture for generation control in islanded microgrids, and illustrate the performance Member, IEEE Abstract In this paper, we propose a distributed architecture for generation control

  14. A load shedding scheme for inverter based microgrids

    E-Print Network [OSTI]

    Ojeda, Alejandro P

    2011-01-01T23:59:59.000Z

    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 ...

  15. Introduction to the model-free control of microgrids

    E-Print Network [OSTI]

    Michel, Loïc

    2011-01-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    Not Available

    2011-02-01T23:59:59.000Z

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

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

    E-Print Network [OSTI]

    Marnay, Chris

    2014-01-01T23:59:59.000Z

    Storage • Hydrogen Fuel Cell • Energy Management • VSE SCADA Test at Idaho National Lab • Entire Installation Smart Micro-Grid

  18. Understanding the Role of Buildings in a Smart Microgrid

    E-Print Network [OSTI]

    Gupta, Rajesh

    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

  19. Droop Control for Islanded Microgrids Hemanshu R Pota

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    ]. In this paper a linear model of a two- source microgrid is used to tune controllers for reactive power sharing for power sharing amongst renewable resources in microgrid. II. POWER SHARING WITHOUT CONTROL Analysis. For a microgrid modelled as a collection of ideal voltage sources only the controller and sensor dynamics interact

  20. Selective compensation of voltage harmonics in grid-connected microgrids

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    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

  1. Aalborg Universitet Hierarchical Control for Multiple DC Microgrids Clusters

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    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

  2. TOWARDS REAL-TIME GENERATION SCHEDULING IN MICROGRIDS WITH

    E-Print Network [OSTI]

    Zhang, Junshan

    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

  3. Modular Power Architectures for Microgrid Clusters Invited Paper

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    Modular Power Architectures for Microgrid Clusters ­ Invited Paper ­ Hengwei Lin1 , Chengxi Liu1 distributed generation (DG) units, loads and energy storage systems [1]. However, although nowadays microgrid between microgrid and the conventional main power grid is also not clearly standardized. In fact

  4. Phase Locked Loop Control of Inverters in a Microgrid

    E-Print Network [OSTI]

    Hiskens, Ian A.

    an inverter to interface with the microgrid [4], [5], [6]. Such sources include photovoltaic panels, fuel reliability through their ability to island. Islanding means that the microgrid continues to operate autonomously when disconnected from the grid. Islanding provides microgrid customers with greater reliability

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

    E-Print Network [OSTI]

    Hiskens, Ian A.

    , frequency, and voltage control algorithms for the inverters that connect microsources to the microgrid of PEVs on the microgrid at different penetration levels and for different control parameters on microgrid performance. Index Terms--Electric vehicles; frequency control; microgrid; vehicle

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

    E-Print Network [OSTI]

    Lemmon, Michael

    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

  7. The CERTS microgrid and the future of the macrogrid

    SciTech Connect (OSTI)

    Marnay, Chris; Bailey, Owen C.

    2004-06-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Morris, Greg Young

    2012-01-01T23:59:59.000Z

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

  9. 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...

  10. GE Partners on Microgrid Project | GE Global Research

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

    and Academia Partner on Microgrid Project GE Awarded a 1.2M Department of Energy Grant to Design Technology to Keep Electricity Flowing after Catastrophic Weather Events...

  11. Energy Department Launches Microgrid Competition to Support Resiliency...

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

    system." The Microgrid 2014 MVP Challenge builds on efforts by the Sandy Rebuilding Task Force to harness innovation in energy infrastructure and help communities become more...

  12. Microgrid V2G Charging Station Interconnection Testing (Presentation)

    SciTech Connect (OSTI)

    Simpson, M.

    2013-07-01T23:59:59.000Z

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

  13. Distributed Generation Investment by a Microgrid Under Uncertainty

    E-Print Network [OSTI]

    Siddiqui, Afzal; Marnay, Chris

    2006-01-01T23:59:59.000Z

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

  14. Reliability of islanded microgrids with stochastic generation and prioritized load

    E-Print Network [OSTI]

    Marden, Mirjana Milosevic

    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 ...

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

    E-Print Network [OSTI]

    Marnay, Chris

    2014-01-01T23:59:59.000Z

    economic feasibility of potential renewable energy, energyrenewable energy, identifies the barriers to microgrid development and suggests potentialpotential to increase reliability, energy efficiency, and use of renewable

  16. Mitigation of Voltage and Current Harmonics in Grid-Connected Microgrids

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    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

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

    E-Print Network [OSTI]

    Keaveny, Tony

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

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

    SciTech Connect (OSTI)

    Marnay, Chris; Marnay, Chris; Zhou, Nan

    2008-02-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Guillas, Serge

    , 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

  20. Power Quality Improvement in Microgrid Using Advanced Active Power Conditioner

    E-Print Network [OSTI]

    unknown authors

    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

  1. Renewable Energy Microgrid Testbed at NASA Ames Research

    E-Print Network [OSTI]

    Lee, Herbie

    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

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

    SciTech Connect (OSTI)

    Not Available

    2013-07-01T23:59:59.000Z

    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.

  3. Power flow analysis for DC voltage droop controlled DC microgrids

    E-Print Network [OSTI]

    Chaudhary, Sanjay

    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

  4. SMART FUEL CELL OPERATED RESIDENTIAL MICRO-GRID COMMUNITY

    SciTech Connect (OSTI)

    Dr. Mohammad S. Alam (PI/PD)

    2005-04-13T23:59:59.000Z

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

  5. Technical Report for "Hybrid Renewable Energy Investment in Microgrid"

    E-Print Network [OSTI]

    Huang, Jianwei

    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

  6. Microgrids and Heterogeneous Power Quality and Reliability

    SciTech Connect (OSTI)

    LaCommare, Kristina; Marnay, Chris

    2007-10-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

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

    2006-01-01T23:59:59.000Z

    of employing two different droop controls in each DER thatcontrol algorithms. The two droop functions are voltage as ain [1] and [2]. The voltage droop function and the frequency

  8. Secondary Control for Voltage Unbalance Compensation in an Islanded Microgrid

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    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

  9. Distributed Generation Investment by a Microgrid under Uncertainty

    SciTech Connect (OSTI)

    Marnay, Chris; Siddiqui, Afzal; Marnay, Chris

    2008-08-11T23:59:59.000Z

    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.

  10. Adaptive load control of microgrids with non-dispatchable generation

    E-Print Network [OSTI]

    Brokish, Kevin Martin

    2009-01-01T23:59:59.000Z

    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 ...

  11. Hardware simulation of diesel generator and microgrid stability

    E-Print Network [OSTI]

    Zieve, Michael M

    2012-01-01T23:59:59.000Z

    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, ...

  12. Design and implementation of a microgrid-capable solar inverter

    E-Print Network [OSTI]

    Darcey, Gavin M

    2013-01-01T23:59:59.000Z

    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 ...

  13. Integration of Distributed Energy The CERTS MicroGrid Concept

    E-Print Network [OSTI]

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

  14. Integration of distributed energy resources. The CERTS Microgrid Concept

    E-Print Network [OSTI]

    2002-01-01T23:59:59.000Z

    of Distributed Energy Resources - The C E R T S M i c r o Gof Distributed Energy Resources - The C E R T S M i c r o Gof Distributed Energy Resources - The C E R T S M i c r o G

  15. Analysis of electric vehicle interconnection with commercial building microgrids

    SciTech Connect (OSTI)

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

    2011-04-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Yeoh, William

    , 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

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

    E-Print Network [OSTI]

    Jesshope, Chris

    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

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

    E-Print Network [OSTI]

    Lo, Tzu-Wei

    2005-11-01T23:59:59.000Z

    This thesis presents a multi-purpose sensor concept viable for the simultaneous measurement of pressure, temperature and thickness of plate structures. It also establishes the knowledge base necessary for future sensor ...

  19. Multi-Building Microgrids for a Distributed Energy Future in Portugal

    E-Print Network [OSTI]

    Mendes, Goncalo

    2013-01-01T23:59:59.000Z

    field for entrance of ESCO businesses in the microgridfield for entrance of ESCO businesses in the microgrid

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

    E-Print Network [OSTI]

    Ferrari-Trecate, Giancarlo

    by microgrids that normally operate in grid-connected mode and that can be switched off- grid for guaranteeing

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

    E-Print Network [OSTI]

    Tolbert, Leon M.

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

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

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    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

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

    E-Print Network [OSTI]

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

  4. Self-triggered Communication Enabled Control of Distributed Generation in Microgrids

    E-Print Network [OSTI]

    Mazumder, Sudip K.

    1 Self-triggered Communication Enabled Control of Distributed Generation in Microgrids Muhammad. I. INTRODUCTION Effective integration of multiple distributed generation (DG) units in microgrids. Conventionally the secondary control in a microgrid is based on a centralized control structure using periodic

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

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    the validity of the proposed models. Index Terms--Droop control, microgrids, power systems stability, power systems modeling. I. INTRODUCTION Microgrids consist of interconnected distributed storages and energy1 Model Order Reductions for Stability Analysis of Islanded Microgrids with Droop Control V

  6. Distributed Generation Investment by a Microgrid UnderUncertainty

    SciTech Connect (OSTI)

    Siddiqui, Afzal; Marnay, Chris

    2006-06-16T23:59:59.000Z

    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.

  7. Microgrids and Heterogeneous Security, Quality, Reliability, andAvailability

    SciTech Connect (OSTI)

    Marnay, Chris

    2007-01-31T23:59:59.000Z

    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.

  8. Microgrid Workshop Report August 2011 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport(FactDepartment3311, 3312),Microgrid Workshop Report August 2011 Microgrid Workshop

  9. MICROGRIDS -The Exploitation of Massive On-chip Concurrency

    E-Print Network [OSTI]

    Jesshope, Chris

    MICROGRIDS - The Exploitation of Massive On-chip Concurrency C. R. Jesshope Department of Computer not yield concurrency unless existing code is recompiled using the concurrency controls introduced be explicitly programmed and is at a relatively coarse grain. An ideal architecture would provide this same

  10. Randomized Auction Design for Electricity Markets between Grids and Microgrids

    E-Print Network [OSTI]

    Li, Zongpeng

    Randomized Auction Design for Electricity Markets between Grids and Microgrids Linquan Zhang Dept@cs.hku.hk ABSTRACT This work studies electricity markets between power grids and mi- crogrids, an emerging paradigm Problem; Mechanism Design; Approximation Algorithms 1. INTRODUCTION An electrical power grid

  11. Sharing Renewable Energy in Smart Microgrids , Zhichuan Huang

    E-Print Network [OSTI]

    Shenoy, Prashant

    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

  12. Understanding the Role of Buildings in a Smart Microgrid

    E-Print Network [OSTI]

    Yuvraj Agarwal; Thomas Weng; Rajesh K. Gupta

    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

  13. Microgrids, virtual power plants and our distributed energy future

    SciTech Connect (OSTI)

    Asmus, Peter

    2010-12-15T23:59:59.000Z

    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)

  14. Electric Grid State Estimators for Distribution Systems with Microgrids

    E-Print Network [OSTI]

    Gupta, Vijay

    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

  15. Hybrid Renewable Energy Investment in Microgrid Hao Wang, Jianwei Huang

    E-Print Network [OSTI]

    Huang, Jianwei

    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

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

    E-Print Network [OSTI]

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

    2014-01-01T23:59:59.000Z

    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 ...

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

    SciTech Connect (OSTI)

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

    2014-02-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

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

    2013-01-01T23:59:59.000Z

    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.

  19. Value and Technology Assessment to Enhance the Business Case for the CERTS Microgrid

    E-Print Network [OSTI]

    Lasseter, Robert

    2010-01-01T23:59:59.000Z

    Genset Reliability The genset equipment is consideredAssessments of reliability for the generating equipment asreliability considerations, into its optimization of microgrid equipment

  20. 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

  1. The added economic and environmental value of plug-in electric vehicles connected to commercial building microgrids

    E-Print Network [OSTI]

    Stadler, Michael

    2010-01-01T23:59:59.000Z

    microgrid, which may include photovoltaic (PV), solar thermal, stationary batteries, thermal storage, and combined heat and power (

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

    E-Print Network [OSTI]

    Qu, Zhihua

    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

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

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

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

  4. Micro-Grids for Colonias (TX)

    SciTech Connect (OSTI)

    Dean Schneider; Michael Martin; Renee Berry; Charles Moyer

    2012-07-31T23:59:59.000Z

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

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

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

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

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

    E-Print Network [OSTI]

    Goldstein, Seth Copen

    Fine-Grained Remote Monitoring, Control and Pre-Paid Electrical Service in Rural Microgrids Maxim microgrid deployment in rural Les Anglais, Haiti. The system consists of a three-tiered architecture,arthur}@earthsparkinternational.org Abstract--In this paper, we present the architecture, design and experiences from a wirelessly managed

  7. Complementary Effect of Wind and Solar Energy Sources in a Microgrid

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    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

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

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    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

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

    E-Print Network [OSTI]

    Teodorescu, Remus

    Sistemes Automàtica i Informàtica Industrial Universitat Politècnica de Catalunya Abstract. In this paper, parallel-connected bidirectional converters for AC and DC hybrid microgrid application energy sources [3-6]. A hybrid microgrid can be made up of distributed renewable source, AC and DC common

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

    E-Print Network [OSTI]

    Michael Angelo Pedrasa

    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

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

    E-Print Network [OSTI]

    Xin Liu; Huaxia Xia; Andrew A. Chien

    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

  12. A Distributed Control Strategy for Coordination of an Autonomous LVDC Microgrid Based on

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    A Distributed Control Strategy for Coordination of an Autonomous LVDC Microgrid Based on Power for autonomous LVDC MGs. Index Terms--Microgrid (MG), voltage-droop (VD) control, battery chargers, power storage systems (ESS). Specifically, the recharging process of secondary battery, the most prominent ESS

  13. Consensus + Innovations Approach for Distributed Multi-Agent Coordination in a Microgrid

    E-Print Network [OSTI]

    Kar, Soummya

    in which distributed resources and loads form microgrids within the bulk power system in which load1 Consensus + Innovations Approach for Distributed Multi-Agent Coordination in a Microgrid Gabriela- agement are expected to become more prevalent in the future electric power system. Coordinating

  14. Power Flow Analysis Algorithm for Islanded LV Microgrids Including Distributed Generator Units with

    E-Print Network [OSTI]

    Chaudhary, Sanjay

    Power Flow Analysis Algorithm for Islanded LV Microgrids Including Distributed Generator Units With larger portion of growing electricity demand which is being fed through distributed generation (DG power system. Being able to operate in both grid-connected and islanded mode, a microgrid manages

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

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    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

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

    E-Print Network [OSTI]

    Prasanna, Viktor K.

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

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

    E-Print Network [OSTI]

    Huang, Jianwei

    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

  18. Microgrid Reliability Modeling and Battery Scheduling Using Stochastic Linear Programming

    SciTech Connect (OSTI)

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

    2013-05-23T23:59:59.000Z

    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.

  19. Microgrids in the Evolving Electricity Generation and DeliveryInfrastructure

    SciTech Connect (OSTI)

    Marnay, Chris; Venkataramanan, Giri

    2006-02-01T23:59:59.000Z

    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.

  20. Distributed control for optimal reactive power compensation in smart microgrids

    E-Print Network [OSTI]

    Bolognani, Saverio

    2011-01-01T23:59:59.000Z

    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.

  1. A Green Prison: The Santa Rita Jail Campus Microgrid

    SciTech Connect (OSTI)

    Marnay, Chris; DeForest, Nicholas; Lai, Judy

    2012-01-22T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

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

    2007-01-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Chu, Zhengguo

    2010-07-14T23:59:59.000Z

    . 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...

  4. Value and Technology Assessment to Enhance the Business Case for the CERTS Microgrid

    E-Print Network [OSTI]

    Lasseter, Robert

    2010-01-01T23:59:59.000Z

    microgrid increase their output power to match the desired decrease in output from the energy storagemicrogrid’s power demand. This investigation utilized batteries as the energy storagemicrogrid’s power demand. This investigation utilized batteries as the energy storage

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

    E-Print Network [OSTI]

    Chu, Zhengguo

    2010-07-14T23:59:59.000Z

    . 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...

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

    E-Print Network [OSTI]

    Zeineldin, H. H.

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

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

    E-Print Network [OSTI]

    Sarkar, Saswati

    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

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

    SciTech Connect (OSTI)

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

    2004-03-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Marnay, Chris

    2010-01-01T23:59:59.000Z

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

  10. Integration& Operation of a Microgrid at Santa Rita Jail

    SciTech Connect (OSTI)

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

    2011-05-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Chen, Zhe

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

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

    SciTech Connect (OSTI)

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

    2012-04-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Zhou, Yaoqi

    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

  14. 944 IEEE TRANSACTIONS ON SUSTAINABLE ENERGY, VOL. 4, NO. 4, OCTOBER 2013 Robust Energy Management for Microgrids With

    E-Print Network [OSTI]

    Giannakis, Georgios

    in microgrids, which feature distributed generation (DG) and distributed storage (DS). Distributed economic of distributed storage (DS) units, and their index. Number of power production facilities with renewable energy for Microgrids With High-Penetration Renewables Yu Zhang, Student Member, IEEE, Nikolaos Gatsis, Member, IEEE

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

    E-Print Network [OSTI]

    Southampton, University of

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

  16. Topology Detection in Microgrids with Micro-Synchrophasors

    E-Print Network [OSTI]

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

    2015-01-01T23:59:59.000Z

    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...

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

    SciTech Connect (OSTI)

    Bose, Sumit; Krok, Michael

    2011-02-08T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    Marnay, Chris; Firestone, Ryan

    2007-04-10T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

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

    2011-07-15T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    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

    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.

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

    E-Print Network [OSTI]

    Johansson, Karl Henrik

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

  2. Synchronization and Power Sharing for Droop-Controlled Inverters in Islanded Microgrids

    E-Print Network [OSTI]

    Bullo, Francesco

    - geneously composed of distributed generation, storage, load, and managed autonomously from the larger priSynchronization and Power Sharing for Droop-Controlled Inverters in Islanded Microgrids John W can be serviced without violating given actuation constraints. Moreover, we propose a distributed

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

    SciTech Connect (OSTI)

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

    2004-11-01T23:59:59.000Z

    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.

  4. Microgrid Implementa1on Ge3ng (rela1vely) down and dirty

    E-Print Network [OSTI]

    Jesshope, Chris

    5/12/10 1 Microgrid Implementa1on Ge3ng (rela1vely) down and dirty The Big & Caches ­ Small caches; because of latency-tolerant architecture · Pipeline · Threads Cache Line · Control Bits read by Fetch Stage ­Switch, End · Register Info

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

    E-Print Network [OSTI]

    Diaconescu, Ada

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

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

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    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

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

    E-Print Network [OSTI]

    Kammen, Daniel M.

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

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

    SciTech Connect (OSTI)

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

    2010-12-01T23:59:59.000Z

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

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

    SciTech Connect (OSTI)

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

    2001-07-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Texas at Arlington, University of

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

  11. Stability, Power Sharing, & Distributed Secondary Control in Droop-Controlled Microgrids

    E-Print Network [OSTI]

    Bullo, Francesco

    , heterogeneously composed of distributed generation, storage, load, and managed autonomously from the larger generation within a microgrid can be highly heterogeneous, including photovoltaic, wind, geother- mal, micro with a synchronous AC grid via power electronic DC/AC inverters. In islanded operation, it is through these inverters

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

    E-Print Network [OSTI]

    Prasanna, Viktor K.

    -driven demand response optimization (DR) in the USC campus microgrid, as part of the Los An- geles Smart Grid to interact with the consumers (or their software/hardware proxies). The Los Angeles Smart Grid Demonstration can later be scaled to a city power grid. Here, we describe our prototype software architecture

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

    E-Print Network [OSTI]

    Lemmon, Michael

    be accomplished through small micro- turbines and gas/diesel generators. Storage devices such as battery banks Abstract-- Microgrids are power generation and distribution systems in which users and generators are in close proximity. They usually have limited power generation capacity, and are networked together to meet

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

    SciTech Connect (OSTI)

    Udhay Ravishankar; Milos manic

    2013-08-01T23:59:59.000Z

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

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

    E-Print Network [OSTI]

    Stadler, Michael

    2009-01-01T23:59:59.000Z

    vs. Short-Term Energy Storage Technologies Analysis, A Life-Storage Technologies”, ACEEE 2008 Summer Study on EnergyStorage Technologies on Microgrid Viability The Distributed Energy

  16. 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]

    Vasquez, Juan Carlos

    ECENTLY, microgrids have been taken more attention in the power electronics research community due, a microgrid is defined as a group of distributed generators and energy storage systems which could operate, if the grid power quality is not good, the Microgrid Central Controller can decide to disconnect

  17. 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]

    Hiskens, Ian A.

    Dynamics of a Microgrid Supplied by Solid Oxide Fuel Cells1 Eric M. Fleming Ian A. Hiskens Department-- The paper presents a model for a solid oxide fuel cell (SOFC) stack operating at relatively low pressures. Keywords: Solid oxide fuel cells, microgrid dynamics, inverter control. I. INTRODUCTION Distributed

  18. 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]

    /527-microgrids-an-emerging-technology-to-enhance-power-system- reliability Title: Microgrids: An emerging solution to combat reduced power reliability Authors: Siddharth Suryanarayanan, Elias Kyriakides on the society. Such recent international events include: the major power outage in the San Diego area

  19. Assessment of the Economic Potential of Microgrids for Reactive Power Supply

    SciTech Connect (OSTI)

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

    2011-05-01T23:59:59.000Z

    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.

  20. Accelerating the Customer-Driven Microgrid Through Real-Time Digital Simulation

    SciTech Connect (OSTI)

    I. Leonard; T. Baldwin; M. Sloderbeck

    2009-07-01T23:59:59.000Z

    Comprehensive design and testing of realistic customer-driven microgrids requires a high performance simulation platform capable of incorporating power system and control models with external hardware systems. Traditional non real-time simulation is unable to fully capture the level of detail necessary to expose real-world implementation issues. With a real-time digital simulator as its foundation, a high-fidelity simulation environment that includes a robust electrical power system model, advanced control architecture, and a highly adaptable communication network is introduced. Hardware-in-the-loop implementation approaches for the hardware-based control and communication systems are included. An overview of the existing power system model and its suitability for investigation of autonomous island formation within the microgrid is additionally presented. Further test plans are also documented.

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

    SciTech Connect (OSTI)

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

    2009-05-07T23:59:59.000Z

    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.

  2. Further Results on Distributed Secondary Control in Microgrids Hedi Bouattour, John W. Simpson-Porco, Florian Dorfler, and Francesco Bullo

    E-Print Network [OSTI]

    Bullo, Francesco

    , and extend them to the case where only a fraction of inverters cooperates in regulating the network frequency. We show that both these secondary-control schemes achieve frequency regulation in the presence]. Energy generation within a microgrid can be highly heterogeneous, including pho- tovoltaics, wind

  3. 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

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

    E-Print Network [OSTI]

    Al Faruque, Mohammad Abdullah

    GridMat: Matlab Toolbox for GridLAB-D to Analyse Grid Impact and Validate Residential Microgrid, in this paper, we present a new Matlab toolbox (GridMat) to integrate the capabilities of domain-specific modeling & simulation tools from power system (GridLAB-D) and control (Matlab). The GridMat tool supports

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

    E-Print Network [OSTI]

    Farzad Vazinram; Majid G; Mehdi Bayat Mokhtari

    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

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

    SciTech Connect (OSTI)

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

    2004-03-15T23:59:59.000Z

    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.

  7. IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, VOL. 30, NO. 6, JULY 2012 1061 Decentralized Economic Dispatch in Microgrids via

    E-Print Network [OSTI]

    Shen, Xuemin "Sherman"

    Economic Dispatch in Microgrids via Heterogeneous Wireless Networks Hao Liang, Student Member, IEEE, Bong at the minimum cost based on the economic dispatch. In this paper, we introduce a decentralized economic dispatch wireless communication devices are used to establish an ad hoc network as a basic information exchange

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

    E-Print Network [OSTI]

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

  9. 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]

    Vasquez, Juan Carlos

    .; 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

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

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

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

  11. This document downloaded from www.microgrids.et.aau.dk is the preprint version of the paper: D. Wu, F. Tang, T. Dragicevic, J. C. Vasquez, J. M. Guerrero, "A control architecture to coordinate renewable energy sources and energy

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    renewable energy sources and energy storage systems in islanded microgrids," IEEE Trans. Smart Grid, Early into account both the available power in renewable energy sources (RES) and storage capacity of energy storage and flexibly controlled compared to the large centralized power systems. Microgrid is emerging as a potential

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

    E-Print Network [OSTI]

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

    2010-01-01T23:59:59.000Z

    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.

  13. 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)

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

    2009-03-10T23:59:59.000Z

    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.

  14. Facility Microgrids

    E-Print Network [OSTI]

    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

    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

  15. The added economic and environmental value of plug-in electric vehicles connected to commercial building microgrids

    SciTech Connect (OSTI)

    Stadler, Michael; Momber, Ilan; Megel, Olivier; Gomez, Tomás; Marnay, Chris; Beer, Sebastian; Lai, Judy; Battaglia, Vincent

    2010-08-25T23:59:59.000Z

    Connection of electric storage technologies to smartgrids or microgrids will have substantial implications for building energy systems. In addition to potentially supplying ancillary services directly to the traditional centralized grid (or macrogrid), local storage will enable demand response. As an economically attractive option, mobile storage devices such as plug-in electric vehicles (EVs) are in direct competition with conventional stationary sources and storage at the building. In general, it is assumed that they can improve the financial as well as environmental attractiveness of renewable and fossil based on-site generation (e.g. PV, fuel cells, or microturbines operating with or without combined heat and power). Also, mobile storage can directly contribute to tariff driven demand response in commercial buildings. In order to examine the impact of mobile storage on building energy costs and carbon dioxide (CO2) emissions, a microgrid/distributed-energy-resources (DER) adoption problem is formulated as a mixed-integer linear program with minimization of annual building energy costs applying CO2 taxes/CO2 pricing schemes. The problem is solved for a representative office building in the San Francisco Bay Area in 2020. By using employees' EVs for energy management, the office building can arbitrage its costs. But since the car battery lifetime is reduced, a business model that also reimburses car owners for the degradation will be required. In general, the link between a microgrid and an electric vehicle can create a win-win situation, wherein the microgrid can reduce utility costs by load shifting while the electric vehicle owner receives revenue that partially offsets his/her expensive mobile storage investment. For the California office building with EVs connected under a business model that distributes benefits, it is found that the economic impact is very limited relative to the costs of mobile storage for the site analyzed, i.e. cost reductions from electric vehicle connections are modest. Nonetheless, this example shows that some economic benefit is created because of avoided demand charges and on-peak energy. The strategy adopted by the office building is to avoid these high on-peak costs by using energy from the mobile storage in the business hours. CO2 emission reduction strategy results indicate that EVs' contribution at the selected office building are minor.

  16. 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

  17. 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]

    Bullo, Francesco

    ], 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

  18. 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]

    unknown authors

    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

  19. IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, VOL. XX, NO. XX, MONTH 20XX 1 Decentralized Economic Dispatch in Microgrids via

    E-Print Network [OSTI]

    Zhuang, Weihua

    Economic Dispatch in Microgrids via Heterogeneous Wireless Networks Hao Liang, Student Member, IEEE, Bong at the minimum cost based on the economic dispatch. In this paper, we propose a decentralized economic dispatch wireless communication devices are used to establish an ad hoc network as a basic information exchange

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

    SciTech Connect (OSTI)

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

    2002-10-01T23:59:59.000Z

    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.

  1. revision:19970323 modified:19970323

    E-Print Network [OSTI]

    Shelah, Saharon

    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

  2. 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]

    Vasquez, Juan Carlos

    -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

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

    SciTech Connect (OSTI)

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

    2009-08-15T23:59:59.000Z

    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.

  4. Common tester platform concept.

    SciTech Connect (OSTI)

    Hurst, Michael James

    2008-05-01T23:59:59.000Z

    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.

  5. College Students‘ GIS Spatial Concept Knowledge Assessed by Concept Maps

    E-Print Network [OSTI]

    Oda, Katsuhiko

    2012-07-16T23:59:59.000Z

    an introductory-level GIS course to create concept maps about space and revised their concept maps in three experiment sessions. For the first question, the researcher scored the sixty obtained concept maps and statistically analyzed those scores to examine...

  6. Modified Faraday cup

    DOE Patents [OSTI]

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

    1996-01-01T23:59:59.000Z

    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.

  7. Modified Faraday cup

    DOE Patents [OSTI]

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

    1996-09-10T23:59:59.000Z

    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.

  8. The Modified Dirac Equation

    E-Print Network [OSTI]

    Burra G. Sidharth

    2009-11-10T23:59:59.000Z

    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.

  9. Viscosity in modified gravity

    E-Print Network [OSTI]

    Iver Brevik

    2012-11-23T23:59:59.000Z

    A bulk viscosity is introduced in the formalism of modified gravity. It is shown that, on the basis of a natural scaling law for the viscosity, a simple solution can be found for quantities such as the Hubble parameter and the energy density. These solutions may incorporate a viscosity-induced Big Rip singularity. By introducing a phase transition in the cosmic fluid, the future singularity can nevertheless in principle be avoided.

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

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartment of EnergyThe U.S. DepartmentEnergy WASHINGTON,Concept to

  11. On Modified Gravity

    E-Print Network [OSTI]

    Ivan Dimitrijevic; Branko Dragovich; Jelena Grujic; Zoran Rakic

    2012-04-09T23:59:59.000Z

    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.

  12. Utility Grid EV charging

    E-Print Network [OSTI]

    Chaudhary, Sanjay

    -DC microgrid Power flow analysis for droop controlled LV hybrid AC-DC microgrids with virtual impedance Chendan AC-DC microgrid based on droop control and virtual impedance. Droop and virtual impedance concepts-DC microgrid, droop control, virtual impedance, power flow. I. INTRODUCTION Recent technology development

  13. Concept of Operations: Essence

    SciTech Connect (OSTI)

    Hutton, William J.

    2014-04-01T23:59:59.000Z

    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.

  14. Data Mining: Concepts and Techniques

    E-Print Network [OSTI]

    Geldenhuys, Jaco

    11 Data Mining: Concepts and Techniques (3rd ed.) -- Chapter 1 -- Jiawei Han, Micheline Kamber. All rights reserved. #12;July 29, 2013 Data Mining: Concepts and Techniques 2July 29, 2013 Data Mining: Concepts and Techniques 2 #12;July 29, 2013 Data Mining: Concepts and Techniques 3July 29, 2013 Data Mining

  15. Separations innovative concepts: Project summary

    SciTech Connect (OSTI)

    Lee, V.E. (ed.)

    1988-05-01T23:59:59.000Z

    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.

  16. Sophia Proof of Concept Report

    SciTech Connect (OSTI)

    Gordon Rueff; Corey Thuen; James Davidson

    2010-03-01T23:59:59.000Z

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

  17. 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...

  18. Peru modifies contractors' terms

    SciTech Connect (OSTI)

    Not Available

    1985-05-01T23:59:59.000Z

    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.

  19. 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.

  20. 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)

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

    2008-12-01T23:59:59.000Z

    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.

  1. Use-driven concept formation

    E-Print Network [OSTI]

    Roberts, Jennifer M. (Jennifer Marie)

    2010-01-01T23:59:59.000Z

    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 ...

  2. Securities trading of concepts (STOC)

    E-Print Network [OSTI]

    Dahan, Ely

    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 ...

  3. CONCEPT computer code

    SciTech Connect (OSTI)

    Delene, J.

    1984-01-01T23:59:59.000Z

    CONCEPT is a computer code that will provide conceptual capital investment cost estimates for nuclear and coal-fired power plants. The code can develop an estimate for construction at any point in time. Any unit size within the range of about 400 to 1300 MW electric may be selected. Any of 23 reference site locations across the United States and Canada may be selected. PWR, BWR, and coal-fired plants burning high-sulfur and low-sulfur coal can be estimated. Multiple-unit plants can be estimated. Costs due to escalation/inflation and interest during construction are calculated.

  4. PID Control Effectiveness for Surface Reactor Concepts

    SciTech Connect (OSTI)

    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

    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.

  5. Modified acyl-ACP desaturase

    DOE Patents [OSTI]

    Cahoon, Edgar B. (Shoreham, NY); Shanklin, John (Shoreham, NY); Lindgvist, Ylva (Jarfalla, SE); Schneider, Gunter (Jarfalla, SE)

    1998-01-06T23:59:59.000Z

    Disclosed is a methods 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.

  6. Modified Acyl-ACP desaturase

    DOE Patents [OSTI]

    Cahoon, Edgar B. (Shoreham, NY); Shanklin, John (Shoreham, NY); Lindqvist, Ylva (Jarfalla, SE); Schneider, Gunter (Jarfalla, SE)

    1999-03-30T23:59:59.000Z

    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.

  7. Re-evaluation of monitored retrievable storage concepts

    SciTech Connect (OSTI)

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

    1989-04-01T23:59:59.000Z

    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.

  8. Section 10: Risk Management Concepts

    E-Print Network [OSTI]

    2014-12-04T23:59:59.000Z

    Dec 2, 2014 ... In this lesson we will discuss some concepts from risk management and insurance. We will go over the basic definitions and discuss some ...

  9. Smart Home Concepts: Current Trends

    E-Print Network [OSTI]

    Venkatesh, Alladi

    2003-01-01T23:59:59.000Z

    Smart Home Concepts: Current Trends Alladi Venkatesh Ph.D.developments concerning smart home technologies and theirNews (Southern Report): Smart homes and high-tech clothing

  10. ADVANCED SULFUR CONTROL CONCEPTS

    SciTech Connect (OSTI)

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

    2003-01-01T23:59:59.000Z

    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).

  11. Sandia National Laboratories: Microgrid

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

    to solve many of the nation's most complex challenges in satisfying its electric energy needs. Initial focus has been on enabling resilient and reliable performance when...

  12. Shape of the microgrid

    E-Print Network [OSTI]

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

    2000-01-01T23:59:59.000Z

    is established for a microturbine at the grocery store onResults for the Office Microturbine C:\\WINNT\\Profiles\\jose\\

  13. Building Scale DC Microgrids

    E-Print Network [OSTI]

    Marnay, Chris

    2014-01-01T23:59:59.000Z

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

  14. Building Scale DC Microgrids

    E-Print Network [OSTI]

    Marnay, Chris

    2013-01-01T23:59:59.000Z

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

  15. Building Scale DC Microgrids

    E-Print Network [OSTI]

    Marnay, Chris

    2013-01-01T23:59:59.000Z

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

  16. Building Scale DC Microgrids

    E-Print Network [OSTI]

    Marnay, Chris

    2014-01-01T23:59:59.000Z

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

  17. 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

  18. Arnold Schwarzenegger CERTS MICROGRID

    E-Print Network [OSTI]

    Program Area Lead Energy Systems Integration Mike Gravely Office Manager Energy Systems Research Martha Commission nor has the California Energy Commission passed upon the accuracy or adequacy of the information, U.S. Department of Energy Richard DeBlasio and Benjamin Kroposki, National Renewable Energy

  19. 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

  20. 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...

  1. Sandia National Laboratories: microgrid

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

    SPIDERS On April 26, 2011, in singlepic id591 w320 h240 floatright SPIDERS (Smart Power Infrastructure Demonstration for Energy Reliability and Security) is based on a Joint...

  2. 2012 Microgrid Workshop Report

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartment ofCBFO-13-3322(EE) | Department1TheDepartmentFY12 DOEDepartment2

  3. Sandia Energy - 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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol Home Distribution Grid Integration Permalink Gallery Mesa del Sol

  4. Sandia Energy - 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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiationImplementing Nonlinear757Kelley Ruehl Home KelleyMary CrawfordMesa del

  5. Sandia Energy » 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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiationImplementingnpitche Home About npitche This authorEnergyTeachesSandia'sMesa

  6. Learning Concept Hierarchies from Text Corpora using Formal Concept Analysis

    E-Print Network [OSTI]

    Cimiano, P; Staab, S; 10.1613/jair.1648

    2011-01-01T23:59:59.000Z

    We present a novel approach to the automatic acquisition of taxonomies or concept hierarchies from a text corpus. The approach is based on Formal Concept Analysis (FCA), a method mainly used for the analysis of data, i.e. for investigating and processing explicitly given information. We follow Harris distributional hypothesis and model the context of a certain term as a vector representing syntactic dependencies which are automatically acquired from the text corpus with a linguistic parser. On the basis of this context information, FCA produces a lattice that we convert into a special kind of partial order constituting a concept hierarchy. The approach is evaluated by comparing the resulting concept hierarchies with hand-crafted taxonomies for two domains: tourism and finance. We also directly compare our approach with hierarchical agglomerative clustering as well as with Bi-Section-KMeans as an instance of a divisive clustering algorithm. Furthermore, we investigate the impact of using different measures wei...

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

    E-Print Network [OSTI]

    Im, Hong G.

    Engineering Department, Ann Arbor, MI 48109-2125, USA and Eric Kurtz Ford Motor Company, Dearborn, MI) for a range of injection timings, EGR rates and speeds. The experimental trends observed for the soot complexities associated with modeling spray dynamics, turbulent mixing, auto-ignition, premixed and diffusion-controlled

  8. Energy Literacy: Essential Principles and Fundamental Concepts...

    Energy Savers [EERE]

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

  9. Gloryhole excavation: Present techniques and future concepts

    SciTech Connect (OSTI)

    Stewart, H.R.; Golby, H.M.

    1984-05-01T23:59:59.000Z

    Exploration wells drilled offshore from floating structures require blow-out preventors (BOP) at or below the seafloor. In the Beaufort Sea, where water depths are relatively shallow, unprotected BOPs are subject to potential impact from ice features. Currently, to protect the BOP from ice damage, it is installed within unretained excavations (gloryholes) below the seafloor. Since 1980, six gloryholes have been excavated for exploration drilling purposes on behalf of Gulf Canada Resources Inc. (GCRI) in water depths ranging from 18 m to 35 metres. Three of these gloryholes were completed in 1983. Recent changes in the methods used for gloryhole excavations have reduced costs. This paper reviews the excavation techniques used to date and presents a case history of a gloryhole excavated during 1983. Costs are described together with a technical evaluation of the various techniques employed. During the development phase, larger gloryholes are anticipated for well clusters. Modified dredging equipment may well be the most economical method of excavating these large depressions. The concept of ''retained'' gloryholes using a caisson is also discussed.

  10. The Enviro-Port concept

    E-Print Network [OSTI]

    McNutt, William Carl

    1977-01-01T23:59:59.000Z

    of Advisory Committee: Dr. Roy W. Harm, Jr. Basic information on the environmental aspects and problems of por'. -industrial complexes is reviewed and discussed. This informati on is based on first a review of selected case studies of existing Texas po. ts... of these systems are causing them to be viewed as an alternative to be considered in the future of Texas and the rest of the Nation. Thesis Objectives The thesis objective is to develop the Enviro-Port concept. This concept will include expanded environmental...

  11. SCIENCE AT THE CROSSROADS Genetically Modified Foods

    E-Print Network [OSTI]

    Newman, Stuart A.

    SCIENCE AT THE CROSSROADS Genetically Modified Foods and the Attack on Nature Stuart A. NewmanBy:[Newman,StuartA.]At:16:493July2009 #12;about, genetically modified (GM) food as scientifically ignorant, economically and Arpad Pusztai, ``Effect of Diets Containing Genetically Modified Potatoes Expressing galanthus nivalis

  12. Adhesives from modified soy protein

    DOE Patents [OSTI]

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

    2008-08-26T23:59:59.000Z

    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.

  13. Progress on DCLL Blanket Concept

    SciTech Connect (OSTI)

    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

    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.

  14. Children's Conceptions of the Brain 

    E-Print Network [OSTI]

    McColl, Judith

    2012-03-14T23:59:59.000Z

    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 naïve biological theories. 56 participants aged 5, 7 and 9-years-old were...

  15. Data Mining: Concepts and Techniques

    E-Print Network [OSTI]

    Geldenhuys, Jaco

    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

  16. Transportation System Concept of Operations

    SciTech Connect (OSTI)

    N. Slater-Thompson

    2006-08-16T23:59:59.000Z

    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.

  17. SUMMARY OF 2009 RHEOLOGY MODIFIER PROGRAM

    SciTech Connect (OSTI)

    Hansen, E.

    2009-12-08T23:59:59.000Z

    The overall objective of the EM-31 Rheological Modifiers and Wetting Agents program is to utilize commercially available rheology modifiers to increase the solids fraction of radioactive sludge based waste streams, resulting in an increase in throughput and decreasing the overall processing time. The program first investigates the impact of rheology modifiers on slurry simulants and then utilizes the most effective rheology modifiers on radioactive slurries. The work presented in this document covers the initial investigation of rheology modifier testing with simulants. This task is supported by both the Savannah River National Laboratory (SRNL) and Pacific Northwest National Laboratory (PNNL). The SRNL EM-31 task, for this year, was to investigate the use of rheology modifiers on simulant Defense Waste Processing Facility (DWPF) melter feeds. The task is to determine, based on the impact of the rheology modifier, if there are rheology modifiers that could reduce the water content of the slurry going to the DWPF melter, hence increasing the melt rate by decreasing the water loading. The rheology modifier in essence would allow a higher solids content slurry to have the same type of rheology or pumpability of a lower solids slurry. The modifiers selected in this report were determined based on previous modifiers used in high level waste melter feed simulants, on-going testing performed by counterparts at PNNL, and experiences gain through use of modifiers in other Department of Energy (DOE) processes such as grout processing. There were 12 rheology modifiers selected for testing, covering both organic and inorganic types and they were tested at four different concentrations for a given melter feed. Five different DWPF melter feeds were available and there was adequate material in one of the melter feeds to increase the solids concentration, resulting in a total of six simulants for testing. The mass of melter feed available in each simulant was not adequate for testing each rheology modifier, hence based on the changes in rheology for a given rheology modifier, rheology modifiers were either dropped or added between simulants. Three rheology modifiers were used on all simulants. The results from this testing indicate that citric acid or polycarboxylate based rheology modifiers are the most effective in reducing the yield stress, by as much as 70% at the higher rheology modifier additions and were effective on most of the tested simulants. These rheology modifiers are organic, hence the can also be used as reductants in melter operations. The most effective non-organic rheology modifiers, sodium metasilicate reduced the yield stress by 10%. It is recommended that both citric acid and commercially available polycarboxylate rheology modifiers be further investigated. Different molecular weight polycarboxylates and different types of polycarboxylates used in other industries must be considered. These polycarboxylates are extensively utilized in the cement, ceramic, and water treatment processes, hence readily available. Future work on DWPF melter feeds involving rheology modifiers should include, assuming the present method of processing sludge through DPWF does not change, is: (1) Investigate the use of polycarboxylate in various processes and procure polycarboxylates for testing. Limit rheology modifier selection and future testing between four and eight different types. (2) Test rheology modifiers on at least two different chemical types or bounding DWPF SME product simulants. Test to include the impact of boiling and the effectiveness in reducing water content via rheology versus weight percent curves. (3) Based on selected modifiers, perform testing on actual radioactive melter feed based on results from simulant testing.

  18. Bistatic SAR: Proof of Concept.

    SciTech Connect (OSTI)

    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

    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.

  19. Method of modifying a surface

    DOE Patents [OSTI]

    Renk, Timothy J. (Albuquerque, NM); Sorensen, Neil R. (Albuquerque, NM); Senft, Donna Cowell (Albuquerque, NM); Buchheit, Jr., Rudolph G. (Columbus, OH); Thompson, Michael O. (Ithaca, NY); Grabowski, Kenneth S. (Alexandria, VA)

    2000-01-01T23:59:59.000Z

    The present invention provides a surface modification method that provides beneficial changes in surface properties, can modify a surface to a greater depth than previous methods, and that is suitable for industrial application. The present method comprises applying a thin-film coating to a surface of a substrate, then subjecting the coated surface to an ion beam. The ion beam power pulse heats the coated surface, leading to alloying between the material in the coating and the material of the substrate. Rapid cooling of the alloyed layer after an ion beam pulse can lead to formation of metastable alloys and microstructures not accessible by conventional alloying methods or intense ion beam treatment of the substrate alone.

  20. The Enviro-Port concept 

    E-Print Network [OSTI]

    McNutt, William Carl

    1977-01-01T23:59:59.000Z

    . . . . . . 82 Enviro-Port Si te Sel ection I"patri x . . . . . . . 92 LIST OF F IGURES Oil Spills by County, January 1973- November 1974 . Causes of Spills by Incident and Volume . quantity of Oil SpiIled by Cause- January 1973 - November 1974... 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...

  1. CIRCULATING MOVING BED COMBUSTION PROOF OF CONCEPT

    SciTech Connect (OSTI)

    Jukkola, Glen

    2010-06-30T23:59:59.000Z

    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.

  2. Generic repository design concepts and thermal analysis (FY11).

    SciTech Connect (OSTI)

    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

    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.

  3. Guidance Regarding Refinancing, Restructuring, or Modifying Loan...

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

    addresses potential refinancing, restructuring, or modifying of a loan agreement entered into by an energy services company under a federal energy savings performance contract....

  4. Guidance Regarding Refinancing, Restructuring, or Modifying ESPC...

    Office of Environmental Management (EM)

    or modifying of a loan agreement entered into by an energy services company (ESCO) under a Federal energy savings performance contract (ESPC). 14idiqrefinance.pdf More...

  5. Modified Accelerated Cost-Recovery System (MACRS)

    Broader source: Energy.gov [DOE]

    Under the federal Modified Accelerated Cost-Recovery System (MACRS), businesses may recover investments in certain property through depreciation deductions. The MACRS establishes a set of class l...

  6. Optimization of Multibody Systems using Approximation Concepts

    E-Print Network [OSTI]

    Etman, L.F. Pascal

    UNIVERSITEIT EINDHOVEN Optimization of multibody systems using approximation concepts / Lodewijk Franciscus Pascal Etman. - Eindhoven : Technische Universiteit Eindhoven, 1997. - XVIII, 140 p. - With ref concepts / crashworthiness design / vehicle suspension Druk: Universiteitsdrukkerij TU Eindhoven Support

  7. Advanced fusion concepts: project summaries

    SciTech Connect (OSTI)

    None

    1980-12-01T23:59:59.000Z

    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)

  8. HYPERION/ODS MODIFYING CANNED QUERIES

    E-Print Network [OSTI]

    Suzuki, Masatsugu

    HYPERION/ODS MODIFYING CANNED QUERIES **Quick review of the Hyperion Query Pane: Sections: Where, Criteria, Views and Joins. Hyperion/ODS ­ Modifying Canned Queries 1 #12;What Canned Queries are Available Note: Go to http://ods.binghamton.edu to view the canned query support documentation for detailed

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

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    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

  10. Nanoparticles modified with multiple organic acids

    DOE Patents [OSTI]

    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

    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.

  11. assisted reactor concept: Topics by E-print Network

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

    Hotho; Steffen Staab 2005-01-01 273 DifferenceinTrialstoConcept Number of Concepts Learned Biology and Medicine Websites Summary: Negative Conditions Trials to Concept Negative...

  12. Review Of Rheology Modifiers For Hanford Waste

    SciTech Connect (OSTI)

    Pareizs, J. M.

    2013-09-30T23:59:59.000Z

    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.

  13. Chemically modified graphite for electrochemical cells

    DOE Patents [OSTI]

    Greinke, R.A.; Lewis, I.C.

    1998-05-26T23:59:59.000Z

    This invention relates to chemically modified graphite particles: (a) that are useful in alkali metal-containing electrode of a electrochemical cell comprising: (1) the electrode, (2) a non-aqueous electrolytic solution comprising an organic aprotic solvent which solvent tends to decompose when the electrochemical cell is in use, and an electrically conductive salt of an alkali metal, and (3) a counter electrode; and (b) that are chemically modified with fluorine, chlorine, iodine or phosphorus to reduce such decomposition. This invention also relates to electrodes comprising such chemically modified graphite and a binder and to electrochemical cells containing such electrodes. 3 figs.

  14. Poplar trees could be genetically modified to

    E-Print Network [OSTI]

    for bioethanol production Flickr/Robert Crum OPINIONS Are new biofuels the ethical answer? Joyce Tait and Banji-modified poplar tree that is a more accessible source of cellulose for bioethanol production. And the emerging

  15. Test particle motion in modified gravity theories

    E-Print Network [OSTI]

    Mahmood Roshan

    2013-02-05T23:59:59.000Z

    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. $\

  16. Compatibilizer for crumb rubber modified asphalt

    SciTech Connect (OSTI)

    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

    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.

  17. Modified Fourier expansions: theory, construction and applications

    E-Print Network [OSTI]

    Adcock, Ben

    2010-10-12T23:59:59.000Z

    Modified Fourier expansions present an alternative to more standard algorithms for the approximation of nonperiodic functions in bounded domains. This thesis addresses the theory of such expansions, their effective construction and computation...

  18. Modified Boltzmann Transport Equation and Freeze Out

    E-Print Network [OSTI]

    Csernai, L P; Molnár, E; Nyiri, A; Tamosiunas, K

    2005-01-01T23:59:59.000Z

    We study Freeze Out process in high energy heavy ion reaction. The description of the process is based on the Boltzmann Transport Equation (BTE). We point out the basic limitations of the BTE approach and introduce Modified BTE. The Freeze Out dynamics is presented in the 4-dimensional space-time in a layer of finite thickness, and we employ Modified BTE for the realistic Freeze Out description.

  19. Modified Boltzmann Transport Equation and Freeze Out

    E-Print Network [OSTI]

    L. P. Csernai; V. K. Magas; E. Molnar; A. Nyiri; K. Tamosiunas

    2005-05-26T23:59:59.000Z

    We study Freeze Out process in high energy heavy ion reaction. The description of the process is based on the Boltzmann Transport Equation (BTE). We point out the basic limitations of the BTE approach and introduce Modified BTE. The Freeze Out dynamics is presented in the 4-dimensional space-time in a layer of finite thickness, and we employ Modified BTE for the realistic Freeze Out description.

  20. DNA polymerase having modified nucleotide binding site for DNA sequencing

    DOE Patents [OSTI]

    Tabor, Stanley (Cambridge, MA); Richardson, Charles (Chestnut Hill, MA)

    1997-01-01T23:59:59.000Z

    Modified gene encoding a modified DNA polymerase wherein the modified polymerase incorporates dideoxynucleotides at least 20-fold better compared to the corresponding deoxynucleotides as compared with the corresponding naturally-occurring DNA polymerase.

  1. DNA polymerase having modified nucleotide binding site for DNA sequencing

    DOE Patents [OSTI]

    Tabor, S.; Richardson, C.

    1997-03-25T23:59:59.000Z

    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.

  2. Advanced Combustion Concepts - Enabling Systems and Solutions...

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

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

  3. Section 10 (cont.): More Risk Management Concepts

    E-Print Network [OSTI]

    2014-12-04T23:59:59.000Z

    Dec 4, 2014 ... In this lesson we will continue our discussion of risk management concepts. Specifically, we will look at several models for loss random.

  4. Renewable Energy Project Development: Advanced Concept Topics

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

    Concept Topics An Introduction to Risk, Tribal Roles, and Support Policies in the Renewable Energy Project Development Process Course Outline What we will cover... About the...

  5. Concepts and Applications of Stochastically Weighted Stochastic ...

    E-Print Network [OSTI]

    2011-04-08T23:59:59.000Z

    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 ...

  6. 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...

  7. 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...

  8. 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...

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

    E-Print Network [OSTI]

    Maryland at College Park, University of

    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

  10. QUANTITATIVE RISK MANAGEMENT: CONCEPTS, TECHNIQUES AND TOOLS*

    E-Print Network [OSTI]

    Embrechts, Paul

    QUANTITATIVE RISK MANAGEMENT: CONCEPTS, TECHNIQUES AND TOOLS* Paul Embrechts Department of Mathematics ETH Zurich www.math.ethz.ch/~embrechts #12;QUANTITATIVE RISK MANAGEMENT: CONCEPTS, TECHNIQUES Theorems of Quantitative Risk Management · PE's Desert-Island Copula · Example 1: Credit Risk · Example 2

  11. Keep new concepts Check cognition level

    E-Print Network [OSTI]

    Chaudhuri, Surajit

    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

  12. MULTIVERSE CONCEPTIONS AND THE HYPERUNIVERSE PROGRAMME

    E-Print Network [OSTI]

    MULTIVERSE CONCEPTIONS AND THE HYPERUNIVERSE PROGRAMME CAROLIN ANTOS, SY-DAVID FRIEDMAN, RADEK HONZIK, CLAUDIO TERNULLO Abstract. We wish to review some conceptions of the set-theoretic multiverse and evaluate their strength. In §1, we introduce the uni- verse/multiverse dichotomy and discuss its

  13. Medical Bioremediation: A Concept Moving Toward Reality

    E-Print Network [OSTI]

    Alvarez, Pedro J.

    Medical Bioremediation: A Concept Moving Toward Reality John Schloendorn,1,2 Tim Webb,2 Kent, primarily the pyridinium bisretinoid A2E. Medical bioremediation is the concept of reversing the substance bioremediation, the new ap- proach targeting aging diseases has been termed ``medical bioremediation

  14. 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

  15. Plants having modified response to ethylene

    DOE Patents [OSTI]

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

    1997-11-18T23:59:59.000Z

    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. 31 figs.

  16. Plants having modified response to ethylene

    DOE Patents [OSTI]

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

    1998-10-20T23:59:59.000Z

    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.

  17. Plants having modified response to ethylene

    DOE Patents [OSTI]

    Meyerowitz, Elliott M. (Pasadena, CA); Chang, Caren (Pasadena, CA); Bleecker, Anthony B. (Madison, WI)

    1997-01-01T23:59:59.000Z

    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.

  18. Plants having modified response to ethylene

    DOE Patents [OSTI]

    Meyerowitz, Elliot M. (Pasadena, CA); Chang, Caren (Pasadena, CA); Bleecker, Anthony B. (Madison, WI)

    1998-01-01T23:59:59.000Z

    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.

  19. Energy manager design for microgrids

    E-Print Network [OSTI]

    Firestone, Ryan; Marnay, Chris

    2005-01-01T23:59:59.000Z

    Predictive Algorithms for Microturbine Performance for BCHPnatural gas engine, and a microturbine is xv Energy Managera reciprocating engine, a microturbine, photovoltaics, or a

  20. Microgrid Activities | Department of Energy

    Energy Savers [EERE]

    strength derives from the flexibility to optimize over a wide range of parameters, from net-zero energy requirements to financial incentives and subsidies for specific...

  1. Energy manager design for microgrids

    E-Print Network [OSTI]

    Firestone, Ryan; Marnay, Chris

    2005-01-01T23:59:59.000Z

    signals to a building energy management system already inStadler. 2003 “Distributed Energy Resources in Practice: Aof µGrid Distributed Energy Resource Potential Using DER-CAM

  2. CERTS Microgrid Laboratory Test Bed

    E-Print Network [OSTI]

    Lasseter, R. H.

    2010-01-01T23:59:59.000Z

    at Northern Power Systems on electrical engineering andhe joined Northern Power Systems as an electrical engineer,power quality requirements. The electrical protection system

  3. CERTS Microgrid Laboratory Test Bed

    E-Print Network [OSTI]

    Lasseter, R. H.

    2010-01-01T23:59:59.000Z

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

  4. BORREGO SPRINGS MICROGRID DEMONSTRATION PROJECT

    SciTech Connect (OSTI)

    None, None

    2013-09-30T23:59:59.000Z

    SDG&E has been developing and implementing the foundation for its Smart Grid platform for three decades – beginning with its innovations in automation and control technologies in the 1980s and 1990s, through its most recent Smart Meter deployment and re-engineering of operational processes enabled by new software applications in its OpEx 20/20 (Operational Excellence with a 20/20 Vision) program. SDG&E’s Smart Grid deployment efforts have been consistently acknowledged by industry observers. SDG&E’s commitment and progress has been recognized by IDC Energy Insights and Intelligent Utility Magazine as the nation’s “Most Intelligent Utility” for three consecutive years, winning this award each year since its inception. SDG&E also received the “Top Ten Utility” award for excellence in Smart Grid development from GreenTech Media.

  5. CERTS Microgrid Laboratory Test Bed

    E-Print Network [OSTI]

    Lasseter, R. H.

    2010-01-01T23:59:59.000Z

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

  6. Microgrid Activities | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport(FactDepartment3311, 3312), OctoberMayEnergyInstituteMicro3EnergyServices

  7. 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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for Renewable Energy: Grid Integration NRELCostBuilding

  8. Microgrid Activities | Department of Energy

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

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

  9. Electrochemical apparatus comprising modified disposable rectangular cuvette

    DOE Patents [OSTI]

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

    2013-09-10T23:59:59.000Z

    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.

  10. Modified discrete random walk with absorption

    E-Print Network [OSTI]

    Theo van Uem

    2009-03-02T23:59:59.000Z

    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.

  11. Screening analysis of solar thermochemical hydrogen concepts.

    SciTech Connect (OSTI)

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

    2008-03-01T23:59:59.000Z

    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.

  12. Architecture and System Analysis of Microgrids with Peer-to-Peer Electricity Sharing to Create a Marketplace which Enables Energy Access

    E-Print Network [OSTI]

    Inam, Wardah

    More than 1.3 billion people in the world lack access to electricity and this energy poverty is a major barrier to human development. This paper describes a new concept of peer-to-peer electricity sharing which creates a ...

  13. A New Model of Nonlocal Modified Gravity

    E-Print Network [OSTI]

    Ivan Dimitrijevic; Branko Dragovich; Jelena Grujic; Zoran Rakic

    2014-11-18T23:59:59.000Z

    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 $\\Box R = q R^{2}.$

  14. Modified 2/11/2003 PATENT CERTIFICATION

    E-Print Network [OSTI]

    Pennycook, Steve

    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

  15. Organic electroanalysis with chemically modified electrodes

    SciTech Connect (OSTI)

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

    1986-01-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    GEUTHER J; CONRAD EA; RHOADARMER D

    2009-08-24T23:59:59.000Z

    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.

  17. Industrial Fellowship in Logistics Apply the tools of logistics science to analyze, modify or rebuild the logistics system of an industry-leader

    E-Print Network [OSTI]

    Lee, Chi-Guhn

    Industrial Fellowship in Logistics Project Apply the tools of logistics science to analyze, modify or rebuild the logistics system of an industry-leader automotive supplier company. Understand the logistics of logistics network, and investigate and quantify potential savings. Design the concept of a computerized

  18. Quantifying the effect of buffer zones, crop areas and spatial aggregation on the externalities of genetically modified crops at landscape level

    E-Print Network [OSTI]

    of GM crops are being addressed in the coexistence debate (e.g. Bock et al., 2002; Boelt, 2003 of genetically modified (GM) crops has led the European Union (EU) to put forward the concept of `coexistence). Coexistence is entirely an economic problem and therefore it does not refer to the environmental impact of GM

  19. Advanced Combustion Concepts - Enabling Systems and Solutions...

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

    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...

  20. Best Practices for Administering Concept Inventories

    E-Print Network [OSTI]

    Madsen, Adrian; Sayre, Eleanor C

    2014-01-01T23:59:59.000Z

    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.

  1. Quality of work – concept and measurement 

    E-Print Network [OSTI]

    Dahlm, Svenn-Åge; Nesheim, Torstein; Olsen, Karen M

    2009-01-01T23:59:59.000Z

    In this paper we review some of the most essential literature on the concept and measurement of quality of work. We show that different academic fields have conceptualized quality of work in distinct ways however there has been a convergence...

  2. Cornucopia: The Concept of Digital Gastronomy

    E-Print Network [OSTI]

    Zoran, Amit Shlomo

    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 ...

  3. 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...

  4. Constructivism, measurement, mathematics Concepts of measurement

    E-Print Network [OSTI]

    Hennig, Christian

    Constructivism, measurement, mathematics Concepts of measurement Measurement and statistics Conclusion Measurement as a constructive act - a statistician's view Christian Hennig March 14, 2013 Christian Hennig Measurement as a constructive act - a statistician's view #12;Constructivism, measurement

  5. Black Hole Thermodynamics in Modified Gravity

    E-Print Network [OSTI]

    Jonas R. Mureika; John W. Moffat; Mir Faizal

    2015-03-03T23:59:59.000Z

    We analyze the thermodynamics of a non-rotating and rotating black hole in a modified theory of gravity that includes scalar and vector modifications to general relativity, which results in a modified gravitational constant $G = G_N(1+\\alpha)$ and a new gravitational charge $Q = \\sqrt{\\alpha G_N}M$. The influence of the parameter $\\alpha$ alters the non-rotating black hole's lifetime, temperature and entropy profiles from the standard Schwarzschild case. The thermodynamics of a rotating black hole is analyzed and it is shown to possess stable, cold remnants. The thermodynamic properties of a vacuum solution regular at $r=0$ are investigated and the solution without a horizon called a "gray hole" is not expected to possess an information loss problem.

  6. Cosmology of modified (but second order) gravity

    E-Print Network [OSTI]

    Tomi S. Koivisto

    2009-10-21T23:59:59.000Z

    This is a brief review of modified gravity cosmologies. Generically extensions of gravity action involve higher derivative terms, which can result in ghosts and instabilities. There are three ways to circumvent this: Chern-Simons terms, first order variational principle and nonlocality. We consider recent cosmological applications of these three classes of modified gravity models, in particular to the dark energy problem. The viable parameter spaces can be very efficiently constrained by taking into account cosmological data from all epochs in addition to Solar system tests and stability considerations. We make some new remarks concerning so called algebraic scalar-tensor theories, biscalar reformulation of nonlocal actions involving the inverse d'Alembertian, and a possible covariant formulation holographic cosmology with nonperturbative gravity.

  7. Modified Newtonian dynamics from acceleration fluctuations

    E-Print Network [OSTI]

    Thomas F. Jordan

    2004-02-16T23:59:59.000Z

    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.

  8. Modified Empirical Parametrization of Fragmentation Cross Sections

    E-Print Network [OSTI]

    K. Sümmerer; B. Blank

    1999-11-17T23:59:59.000Z

    New experimental data obtained mainly at the GSI/FRS facility allow to modify the empirical parametrization of fragmentation cross sections, EPAX. It will be shown that minor modifications of the parameters lead to a much better reproduction of measured cross sections. The most significant changes refer to the description of fragmentation yields close to the projectile and of the memory effect of neutron-deficient projectiles.

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

    SciTech Connect (OSTI)

    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

    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.

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

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

    Provides basic concepts for Clean Energy Unsecured Lending and Loan Loss Reserve Funds. Author: U. S. Department of Energy Chapter 5: Basic Concepts for Clean Energy Unsecured...

  11. assessment concepts methods: Topics by E-print Network

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

    N. Haynes; David C. S. Richard; Edward S. Kubany 1995-01-01 2 Progress on Concept Inventory Assessment Tools Engineering Websites Summary: Progress on Concept Inventory...

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

    Energy Savers [EERE]

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

  13. 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...

  14. Characterization of electrochemically modified polycrystalline platinum surfaces

    SciTech Connect (OSTI)

    Krebs, L.C.; Ishida, Takanobu

    1991-12-01T23:59:59.000Z

    The characterization of electrochemically modified polycrystalline platinum surfaces has been accomplished through the use of four major electrochemical techniques. These were chronoamperometry, chronopotentiommetry, cyclic voltammetry, and linear sweep voltammetry. A systematic study on the under-potential deposition of several transition metals has been performed. The most interesting of these were: Ag, Cu, Cd, and Pb. It was determined, by subjecting the platinum electrode surface to a single potential scan between {minus}0.24 and +1.25 V{sub SCE} while stirring the solution, that the electrocatalytic activity would be regenerated. As a consequence of this study, a much simpler method for producing ultra high purity water from acidic permanganate has been developed. This method results in water that surpasses the water produced by pyrocatalytic distillation. It has also been seen that the wettability of polycrystalline platinum surfaces is greatly dependent on the quantity of oxide present. Oxide-free platinum is hydrophobic and gives a contact angle in the range of 55 to 62 degrees. We have also modified polycrystalline platinum surface with the electrically conducting polymer poly-{rho}-phenylene. This polymer is very stable in dilute sulfuric acid solutions, even under applied oxidative potentials. It is also highly resistant to electrochemical hydrogenation. The wettability of the polymer modified platinum surface is severely dependent on the choice of supporting electrolyte chosen for the electrochemical polymerization. Tetraethylammonium tetrafluoroborate produces a film that is as hydrophobic as Teflon, whereas tetraethylammonium perchlorate produces a film that is more hydrophilic than oxide-free platinum.

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

    E-Print Network [OSTI]

    Lo, Tzu-Wei

    2005-11-01T23:59:59.000Z

    -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...

  16. The concepts of energy, environment, and cost for process design

    SciTech Connect (OSTI)

    Abu-Khader, M.M.; Speight, J.G. [CD & W Inc., Laramie, WY (United States)

    2004-05-01T23:59:59.000Z

    The process industries (specifically, energy and chemicals) are characterized by a variety of reactors and reactions to bring about successful process operations. The design of energy-related and chemical processes and their evolution is a complex process that determines the competitiveness of these industries, as well as their environmental impact. Thus, we have developed an Enviro-Energy Concept designed to facilitate sustainable industrial development. The Complete Onion Model represents a complete methodology for chemical process design and illustrates all of the requirements to achieve the best possible design within the accepted environmental standards. Currently, NOx emissions from industrial processes continue to receive maximum attention, therefore the issue problem of NOx emissions from industrial sources such as power stations and nitric acid plants is considered. The Selective Catalytic Reduction (SCR) is one of the most promising and effective commercial technologies. It is considered the Best Available Control Technology (BACT) for NOx reduction. The solution of NOx emissions problem is either through modifying the chemical process design and/or installing an end-of-pipe technology. The degree of integration between the process design and the installed technology plays a critical role in the capital cost evaluation. Therefore, integrating process units and then optimizing the design has a vital effect on the total cost. Both the environmental regulations and the cost evaluation are the boundary constraints of the optimum solution.

  17. Integrated international safeguards concepts for fuel reprocessing

    SciTech Connect (OSTI)

    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

    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.

  18. Dust-shell Universe in the modified gravity scenario

    E-Print Network [OSTI]

    Michael Maziashvili

    2005-04-15T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Matthewson, M. John

    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

  20. New Concepts in Wind Power Forecasting Models

    E-Print Network [OSTI]

    Kemner, Ken

    New Concepts in Wind Power Forecasting Models Vladimiro Miranda, Ricardo Bessa, João Gama, Guenter to the training of mappers such as neural networks to perform wind power prediction as a function of wind characteristics (mainly speed and direction) in wind parks connected to a power grid. Renyi's Entropy is combined

  1. META-LEARNING Concepts and Techniques

    E-Print Network [OSTI]

    Vilalta, Ricardo

    .g., types of example distributions) under which a learning strategy is most appropriate. From a practicalChapter 1 META-LEARNING Concepts and Techniques Ricardo Vilalta University of Houston Christophe Giraud-Carrier ELCA Informatique SA Pavel Brazdil University of Porto Abstract The field of meta-learning

  2. The exploration of concepts for projectile toys

    E-Print Network [OSTI]

    Kudrowitz, Barry M

    2006-01-01T23:59:59.000Z

    (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 ...

  3. The scientific model concept and realism

    E-Print Network [OSTI]

    Gould, Deke Cainas

    2003-01-01T23:59:59.000Z

    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...

  4. A dynamic kernel modifier for linux

    SciTech Connect (OSTI)

    Minnich, R. G. (Ronald G.)

    2002-09-03T23:59:59.000Z

    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.

  5. Loads Analysis of Several Offshore Floating Wind Turbine Concepts

    SciTech Connect (OSTI)

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

    2011-10-01T23:59:59.000Z

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

  6. TERMINATION OF THE POROUS WALL CONCEPT To: APEX GROUP

    E-Print Network [OSTI]

    California at Los Angeles, University of

    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;

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

    E-Print Network [OSTI]

    Dragan, Feodor F.

    Concepts - 5th Edition, May 23, 2005 Database Management System (DBMS) DBMS contains information about

  8. Product Concept Metrics: a Preliminary Study Working Paper

    E-Print Network [OSTI]

    Takala, Roope

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

  9. Evaluation of polyethylene-modified asphalt blends

    E-Print Network [OSTI]

    Consuegra Granger, Fernando

    1990-01-01T23:59:59.000Z

    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...

  10. Chemically modified carbonic anhydrases useful in carbon capture systems

    DOE Patents [OSTI]

    Novick, Scott J; Alvizo, Oscar

    2013-10-29T23:59:59.000Z

    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.

  11. Chemically modified carbonic anhydrases useful in carbon capture systems

    DOE Patents [OSTI]

    Novick, Scott; Alvizo, Oscar

    2013-01-15T23:59:59.000Z

    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.

  12. Boron modified molybdenum silicide and products

    DOE Patents [OSTI]

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

    1999-02-02T23:59:59.000Z

    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.

  13. Boron modified molybdenum silicide and products

    DOE Patents [OSTI]

    Meyer, M.K.; Akinc, M.

    1999-02-02T23:59:59.000Z

    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.

  14. Low-income consumers, though less aware of genetically modified foods, are concerned and want labels

    E-Print Network [OSTI]

    King, Nicelma J.

    2003-01-01T23:59:59.000Z

    sentiment about genetically modified food. Pew Initia- tiveless aware of genetically modified foods, are concerned andattitudes about genetically modified foods have been

  15. Core length testable reactor concept neutronic analysis

    SciTech Connect (OSTI)

    Hanan, N.A.; Bhattacharyya, S.K.

    1992-09-01T23:59:59.000Z

    Development work on thermionic reactor systems has been ongoing in the US since the early 1950s. While significant successes were achieved, progress has been hampered by frequent changes in direction and funding instabilities (as has been true for many high technology initiatives). The recent Air Force thermionics initiative (1991) represents the latest in thermionics reactor development in the US. This Air Force initiative called for the development of thermionics reactors with the output power of about 40 kWe, and which incorporated the features of testability, fabricability, low development cost, high level of safety and reliability, and survivability. Several concepts were analyzed to define a design that would meet all the requirements set forth by the Air Force. This report describes the methodology used, the different designs analyzed and reasons for the evolution of the design, and presents the results for the different concepts.

  16. Concept of Operations for Data Fusion Visualization

    SciTech Connect (OSTI)

    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

    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.

  17. Concepts in strong Langmuir turbulence theory

    SciTech Connect (OSTI)

    DuBois, D.F.; Rose, H.A.

    1990-01-01T23:59:59.000Z

    Some of the basic concepts of strong Langmuir turbulence (SLT) theory are reviewed. In SLT system, a major fraction of the turbulent energy is carried by local, time-dependent, nonlinear excitations called cavitons. Modulational instability, localization of Langmuir fields by density fluctuations, caviton nucleation, collapse, and burnout and caviton correlations are reviewed. Recent experimental evidence will be presented for SLT phenomena in the interaction of powerful HF waves with the ionosphere and in laser-plasma interaction experiments. 38 refs., 11 figs.

  18. Reactive Attachment Disorder: Concepts, Treatment, and Research

    E-Print Network [OSTI]

    Walter, Uta M.; Petr, Chris

    2004-06-01T23:59:59.000Z

    Best Practices in Children’s Mental Health: A Series of Reports Summarizing the Empirical Research on Selected Topics Report #11 “Reactive Attachment Disorder: Concepts, Treatment and Research” June, 2004... Healthcare” Report #8 – October 2003, “Best Practices in Therapeutic Foster Care: Review of the Literature and Local Practices in the State of Kansas” Report #9 – December 2003, “Juveniles with Sexual Offending Behaviors” Report #10-February 2004...

  19. National Energy Information System basic concepts

    SciTech Connect (OSTI)

    Not Available

    1980-07-01T23:59:59.000Z

    The basic concepts on which the National Energy Information System (NEIS) rests are described and clarified. Identified are the current state of, as well as future information gathering activities of the system. The NEIS was originally created under Congressional mandate to collect, process, and disseminate data useful for analysis of energy supply and consumption issues. An overview of NEIS, data descriptions, metadata (directories, documentation), and procedures of the NEIS system are discussed in a question-and-answer format.

  20. A virtual company concept for reservoir management

    SciTech Connect (OSTI)

    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

    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.

  1. The Exergy Concept Beyond the Academic Environment

    E-Print Network [OSTI]

    El-Sayed, Y. M.

    THE EXERGY CONCEPT BEYOND THE ACADEMIC ENVIRONMENT Y.M. EL-SAYED Consultant Advanced Energy Systems Fremont, California ABSTRACT The lack of the adequate data base for thermodynaaic properties and the coaputational burden of exergy analysis... are two aajor barriers to the second law analysis of industrial processes. In this paper the essential property implementations are discussed and a coaputerization strategy for exergy analysis is described. Examples of the directive role of second law...

  2. ADVANCED HIGH PERFORMANCE SOLID WALL BLANKET CONCEPTS

    SciTech Connect (OSTI)

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

    2002-04-01T23:59:59.000Z

    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.

  3. Nitroimidazoles as modifiers of nitrosourea pharmacokinetics

    SciTech Connect (OSTI)

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

    1984-09-01T23:59:59.000Z

    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.

  4. Dynamical friction in modified Newtonian dynamics

    E-Print Network [OSTI]

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

    2008-03-31T23:59:59.000Z

    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.

  5. The Magellanic Stream in Modified Newtonian Dynamics

    E-Print Network [OSTI]

    Hossein Haghi; Sohrab Rahvar; Akram Hasani-Zonooz

    2007-01-09T23:59:59.000Z

    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.

  6. Modified Newtonian Dynamics In Dimensionless Form

    E-Print Network [OSTI]

    W. F. Kao

    2005-04-01T23:59:59.000Z

    Modified Newtonian dynamics proposed that gravitational field needs modifications when the field strength $g$ is weaker than a critical value $g_0$. This has been shown to be a good candidate as an alternative to cosmic dark matter. There is another way to look at this theory as a length scale dependent theory. One will show that modification of the Newtonian field strength depends on the mass distribution and the coordinate scale of the system. It is useful to separate the effective gravitation field $g(r)$ into a small scale (or short-distance)$g_s$ field and a large scale (or a long-distance) $g_l$ field that should be helpful for a better understanding of the underlying physics. The effective potential is also derived.

  7. Direct liquefaction proof-of-concept program. Topical report

    SciTech Connect (OSTI)

    Comolli, A.G.; Lee, L.K.; Pradhan, V.R. [and others

    1996-12-01T23:59:59.000Z

    This report presents the results of work conducted under the DOE Proof-of-Concept Program in direct coal liquefaction at Hydrocarbon Technologies, Inc. in Lawrenceville, New Jersey, from February 1994 through April 1995. The work includes modifications to HRI`s existing 3 ton per day Process Development Unit (PDU) and completion of the second PDU run (POC Run 2) under the Program. The 45-day POC Run 2 demonstrated scale up of the Catalytic Two-Stage Liquefaction (CTSL Process) for a subbituminous Wyoming Black Thunder Mine coal to produce distillate liquid products at a rate of up to 4 barrels per ton of moisture-ash-free coal. The combined processing of organic hydrocarbon wastes, such as waste plastics and used tire rubber, with coal was also successfully demonstrated during the last nine days of operations of Run POC-02. Prior to the first PDU run (POC-01) in this program, a major effort was made to modify the PDU to improve reliability and to provide the flexibility to operate in several alternative modes. The Kerr McGee Rose-SR{sup SM} unit from Wilsonville, Alabama, was redesigned and installed next to the U.S. Filter installation to allow a comparison of the two solids removal systems. The 45-day CTSL Wyoming Black Thunder Mine coal demonstration run achieved several milestones in the effort to further reduce the cost of liquid fuels from coal. The primary objective of PDU Run POC-02 was to scale-up the CTSL extinction recycle process for subbituminous coal to produce a total distillate product using an in-line fixed-bed hydrotreater. Of major concern was whether calcium-carbon deposits would occur in the system as has happened in other low rank coal conversion processes. An additional objective of major importance was to study the co-liquefaction of plastics with coal and waste tire rubber with coal.

  8. Method of modifying a volume mesh using sheet insertion

    DOE Patents [OSTI]

    Borden, Michael J. (Albuquerque, NM); Shepherd, Jason F. (Albuquerque, NM)

    2006-08-29T23:59:59.000Z

    A method and machine-readable medium provide a technique to modify a hexahedral finite element volume mesh using dual generation and sheet insertion. After generating a dual of a volume stack (mesh), a predetermined algorithm may be followed to modify (refine) the volume mesh of hexahedral elements. The predetermined algorithm may include the steps of locating a sheet of hexahedral mesh elements, determining a plurality of hexahedral elements within the sheet to refine, shrinking the plurality of elements, and inserting a new sheet of hexahedral elements adjacently to modify the volume mesh. Additionally, another predetermined algorithm using mesh cutting may be followed to modify a volume mesh.

  9. Neutrino Flavor Ratios Modified by Cosmic Ray Re-acceleration

    E-Print Network [OSTI]

    Kawanaka, Norita

    2015-01-01T23:59:59.000Z

    Re-acceleration of $\\pi$'s and $\\mu$'s modifies the flavor ratio at Earth (at astrophysical sources) of neutrinos produced by $\\pi$ decay, $\

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

    E-Print Network [OSTI]

    Wenwen Zhou

    2009-09-23T23:59:59.000Z

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

  11. activated carbons modified: Topics by E-print Network

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

    polymer Composite Materials Modified by Carbon Nanotube is introduced, it contains composite materials based ester, composite materials based resin matrix, composite materials...

  12. acid modified carbon: Topics by E-print Network

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

    polymer Composite Materials Modified by Carbon Nanotube is introduced, it contains composite materials based ester, composite materials based resin matrix, composite materials...

  13. activated carbon modified: Topics by E-print Network

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

    polymer Composite Materials Modified by Carbon Nanotube is introduced, it contains composite materials based ester, composite materials based resin matrix, composite materials...

  14. Guidance Regarding Refinancing, Restructuring, or Modifying ESPC Loan Agreements

    Broader source: Energy.gov [DOE]

    Document addresses potential refinancing, restructuring, or modifying of a loan agreement entered into by an energy services company (ESCO) under a Federal energy savings performance contract (ESPC).

  15. 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...

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

    E-Print Network [OSTI]

    2014-03-12T23:59:59.000Z

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

  17. arabica genetically modified: Topics by E-print Network

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

    Modified Foods and the Attack on Nature Stuart A. Newman to improve foods and other crop plants by introducing exogenous genes (experi- mental transgenesis, a type Newman,...

  18. State of the practice: Design and construction of asphalt paving materials with crumb-rubber modifier. Final report

    SciTech Connect (OSTI)

    Heitzman, M.A.

    1992-05-01T23:59:59.000Z

    The document is a comprehensive overview of the terminology, processes, products, and applications of crumb rubber modifier (CRM) technology. The technology includes any use of scrap tire rubber in asphalt paving materials. In general, CRM technology can be divided into two categories--the wet process and the dry process. When CRM is incorporated into an asphalt paving material, it will modify the properties of the binder (asphalt rubber) and/or act as a rubber aggregate (rubber modified hot mix asphalt). The five concepts for using CRM discussed in the report are McDonald, PlusRide, generic dry, chunk rubber asphalt concrete, and continuous blending asphalt rubber. There are two principal unresolved engineering issues related to the use of CRM in asphalt paving materials. On the national level, the ability to recycle asphalt paving mixes containing CRM has not been demonstrated. At the State and local levels, these modified asphalt mixes must be field evaluated to establish expected levels of performance. The appendices provide guidelines for material specifications, mix design, and construction specifications. An experimental work plan for monitoring performance and a stack emission testing program are also included.

  19. SERI Advanced and Innovative Wind-Energy-Concepts Program

    SciTech Connect (OSTI)

    Mitchell, R.L.; Jacobs, E.W.

    1983-06-01T23:59:59.000Z

    In 1978 the Solar Energy Research Institute (SERI) was given the responsibility of managing the Advanced and Innovative Wind Energy Concepts (AIWEC) Task by the US Department of Energy (DOE). The objective of this program has been to determine the technical and economic potential of advanced wind energy concepts. Assessment and R and D efforts in the AIWEC program have included theoretical performance analyses, wind tunnel testing, and/or costing studies. Concepts demonstrating sufficient potential undergo prototype testing in a Proof-of-Concept research phase. Several concepts, such as the Dynamic Inducer, the Diffuser Augmented wind Turbine, the Electrofluid Dynamic Wind-Driven Generator, the Passive Cyclic Pitch concept, and higher performance airfoil configurations for vertical axis wind turbines, have recently made significant progress. The latter has currently reached the Proof-of-Concept phase. The present paper provides an overview of the technical progress and current status of these concepts.

  20. Novel turbomachinery concepts for highly integrated airframe/propulsion systems

    E-Print Network [OSTI]

    Shah, Parthiv N

    2007-01-01T23:59:59.000Z

    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 ...

  1. ATAC Process Proof of Concept Final Report

    SciTech Connect (OSTI)

    Bri Rolston; Sarah Freeman

    2014-03-01T23:59:59.000Z

    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.

  2. Rodolfo Usigli's Concept of Dramatic Art.

    E-Print Network [OSTI]

    Tilles, Solomon T.

    1970-04-01T23:59:59.000Z

    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...

  3. Innovative Confinement Concepts Workshop 2000 (Book of Abstracts)

    E-Print Network [OSTI]

    Celata, Christine; Accelerator and Fusion Research Staff

    2000-01-01T23:59:59.000Z

    Concept A. K . Sen Plasma Research Laboratory ColumbiaFisch Institute for Plasma Research Raytheon Company PPPL

  4. Do Concept Inventories Actually Measure Anything? Colin S. Wallace

    E-Print Network [OSTI]

    Colorado at Boulder, University of

    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

  5. Assessment of Learning Outcomes Using a Mathematical Reasoning Concept Inventory

    E-Print Network [OSTI]

    Hallstrom, Jason

    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

  6. Assessment of Learning Outcomes Using a Mathematical Reasoning Concept Inventory

    E-Print Network [OSTI]

    Hallstrom, Jason

    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

  7. Hypothesis-Based Concept Assignment to Support Software Maintenance

    E-Print Network [OSTI]

    Gold, Nicolas

    is on automatic concept assignment with minimal user involvement, although the activity can also be performed semi-automatically or manually. HB-CA is an example of a plausible reasoning concept assignment system. This approach was adopted analysis [1]. Two other examples of plausible reasoning concept assignment systems are DM-TAO (part

  8. 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

  9. Non-Singular Cosmology in Modified Gravity

    E-Print Network [OSTI]

    J. W. Moffat

    2007-10-24T23:59:59.000Z

    A non-singular cosmology is derived in modified gravity (MOG) with a varying gravitational coupling strength $G(t)=G_N\\xi(t)$. Assuming that the curvature $k$, the cosmological constant $\\Lambda$ and $\\rho$ vanish at $t=0$, we obtain a non-singular universe with a negative pressure, $p_G < 0$. Quantum fluctuations at $t\\sim 0$ produce creation of pairs of particles from the vacuum explaining the origin of matter. The universe expands for $t\\to \\infty$ according to the standard radiation and matter dominated solutions. The arrow of time reverses at $t=0$ always pointing in the direction of increasing entropy ${\\cal S}$ and the entropy is at a minimum value at $t=0$, solving the conundrum of the Second Law of Thermodynamics. The Hubble radius $H^{-1}(t)$ is infinite at $t=0$ removing the curvature and particle horizons. The negative pressure $p_G$ generated by the scalar field $\\xi$ at $t\\sim 0$ can produce quantum spontaneous creation of particles explaining the origin of matter and radiation.

  10. Calibration of a Modified Californium Shuffler

    SciTech Connect (OSTI)

    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

    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.

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

    E-Print Network [OSTI]

    Kwon, So Young

    2007-09-17T23:59:59.000Z

    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...

  12. Advanced Gasifier Pilot Plant Concept Definition

    SciTech Connect (OSTI)

    Steve Fusselman; Alan Darby; Fred Widman

    2005-08-31T23:59:59.000Z

    This report presents results from definition of a preferred commercial-scale advanced gasifier configuration and concept definition for a gasification pilot plant incorporating those preferred technologies. The preferred commercial gasifier configuration was established based on Cost Of Electricity estimates for an IGCC. Based on the gasifier configuration trade study results, a compact plug flow gasifier, with a dry solids pump, rapid-mix injector, CMC liner insert and partial quench system was selected as the preferred configuration. Preliminary systems analysis results indicate that this configuration could provide cost of product savings for electricity and hydrogen ranging from 15%-20% relative to existing gasifier technologies. This cost of product improvement draws upon the efficiency of the dry feed, rapid mix injector technology, low capital cost compact gasifier, and >99% gasifier availability due to long life injector and gasifier liner, with short replacement time. A pilot plant concept incorporating the technologies associated with the preferred configuration was defined, along with cost and schedule estimates for design, installation, and test operations. It was estimated that a 16,300 kg/day (18 TPD) pilot plant gasifier incorporating the advanced gasification technology and demonstrating 1,000 hours of hot-fire operation could be accomplished over a period of 33 months with a budget of $25.6 M.

  13. ASME Material Challenges for Advanced Reactor Concepts

    SciTech Connect (OSTI)

    Piyush Sabharwall; Ali Siahpush

    2013-07-01T23:59:59.000Z

    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.

  14. Additional reductions in the k-constrained modified KP hierarchy

    E-Print Network [OSTI]

    Oleksandr Chvartatskyi; Yuriy Sydorenko

    2013-12-30T23:59:59.000Z

    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.

  15. Role of Modified Chaplygin Gas in Accelerated Universe

    E-Print Network [OSTI]

    Ujjal Debnath; Asit Banerjee; Subenoy Chakraborty

    2004-11-02T23:59:59.000Z

    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.

  16. Modified Fresnel zone plates that produce sharp Gaussian focal spots

    E-Print Network [OSTI]

    Jahns, Jürgen

    Modified Fresnel zone plates that produce sharp Gaussian focal spots Qing Cao and Ju¨rgen Jahns Fresnel zone plate that can produce an approximate Gaussian focal spot is proposed for the focusing of 7.7 nm can be produced by a modified Fresnel zone plate with a minimum structure size of 30 nm

  17. Kaluza-Klein Cosmology With Modified Holographic Dark Energy

    E-Print Network [OSTI]

    M. Sharif; Farida Khanum

    2011-06-13T23:59:59.000Z

    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.

  18. Modified Dry Grind Ethanol Process Vijay Singh1

    E-Print Network [OSTI]

    Modified Dry Grind Ethanol Process Vijay Singh1 , Kent D. Rausch1 *, Ping Yang2 , Hosein Shapouri3-265-0697). #12;Modified Dry Grind Ethanol Process ­ University of Illinois 2 Table of Contents 1. Introductory.....................................................................................................7 3.2. Dry Grind Ethanol

  19. Energy Systems Optimization, Modeling, Simulation,

    E-Print Network [OSTI]

    Qu, Zhihua

    be propagated within the group using cooperative control. As such, a smartgrid may treat microgrids Smartgrid · Microgrid · Distributed generator · Cooperative control · Game theory 1 Introduction The global to the outburst of the distributed generators (DGs) and smartgrid concepts. DGs have many different forms

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

    E-Print Network [OSTI]

    Target Fusion (MTF) Non-toroidal concepts ­­ generally in early exploratory stage · Flow Z-pinch ("ZAP needed? Advanced diagnostics Theory and simulation Support from base program, technology program BPX Non-nuclear technology No DEMO yes May not be ready for first DEMO; Ready for Advanced Power Plant DEMO following tokamak

  1. Accelerated Cosmological Models in Modified Gravity tested by distant Supernovae SNIa data

    E-Print Network [OSTI]

    Andrzej Borowiec; Wlodzimierz Godlowski; Marek Szydlowski

    2006-08-03T23:59:59.000Z

    Recent supernovae of type Ia measurements and other astronomical observations suggest that our universe is in accelerating phase of evolution at the present epoch. While a dark energy of unknown form is usually proposed as the most feasible mechanism for the acceleration, there are appears some alternative conception that some effects arising from generalization of Einstein equation can mimic dark energy through a modified Friedmann equation. In this work we investigate some observational constraints on modified Friedmann equation obtained from generalized Lagrangian ${\\cal L} \\propto R^n$ in minimal coupling with matter in Palatini formalism. We mainly concentrate on the constraints of model parameters from distant supernovae but other constraint from baryon oscillation prior is also considered. We obtain the confidence levels on two additional model parameter ($n$,$\\Omega_{m,0}$). We conclude that the FRW model of First-Order Non-linear gravity survives several observational test like SNIa observation and baryon oscillation peaks. We find preferred value of $\\Omega_{m,0} \\simeq 0.3$ from combined analysis of supernovae data and baryon oscillation peak. For deeper statistical analysis we apply Akaike and Bayesian information criteria of model selection for comparison prediction of the model with prediction of concordance $\\Lambda$CDM model.

  2. A CONCEPT FOR NATIONAL NUCLEAR FORENSIC LIBRARIES

    SciTech Connect (OSTI)

    Wacker, John F.; Curry, Michael

    2010-08-11T23:59:59.000Z

    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.

  3. Fast Track'' nuclear thermal propulsion concept

    SciTech Connect (OSTI)

    Johnson, R.A.; Zweig, H.R. (Rocketdyne Division, Rockwell International Corporation, 6633 Canoga Avenue, P.O. Box 7922, Canoga Park, California 91309-7922 (United States)); Cooper, M.H.; Wett, J. Jr. (Westinghouse Electric Corporation, Post Office Box 158, Madison, Pennsylvania 15663 (United States))

    1993-01-10T23:59:59.000Z

    The objective of the Space Exploration Initiative ( America at the Threshold...,'' 1991) is the exploration of Mars by man in the second decade of the 21st century. The NASA Fast Track'' approach (NASA-LeRC Presentation, 1992) could accelerate the manned exploration of Mars to 2007. NERVA-derived nuclear propulsion represents a viable near-term technology approach to accomplish the accelerated schedule. Key milestones in the progression to the manned Mars mission are (1) demonstration of TRL-6 for the man-rateable system by 1999, (2) a robotic lunar mission by 2000, (3) the first cargo mission to Mars by 2005, and (4) the piloted Mars mission in 2007. The Rocketdyne-Westinghouse concept for nuclear thermal propulsion to achieve these milestones combines the nuclear reactor technology of the Rover/NERVA programs and the state-of-the-art hardware designs from hydrogen-fueled rocket engine successes like the Space Shuttle Main Engine (SSME).

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

    SciTech Connect (OSTI)

    Ahmed Hassan

    2004-09-01T23:59:59.000Z

    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.

  5. 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...

  6. Modified Ricci flow and asymptotically non-flat spaces

    E-Print Network [OSTI]

    Shubhayu Chatterjee; Narayan Banerjee

    2013-04-08T23:59:59.000Z

    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.

  7. 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

  8. Modified Advection-Aridity Model of Evapotranspiration Jozsef Szilagyi1

    E-Print Network [OSTI]

    Szilagyi, Jozsef

    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

  9. Genetically modified food and crops: perceptions of risks 

    E-Print Network [OSTI]

    Hall, Clare R.

    2010-01-01T23:59:59.000Z

    The debate around genetically modified food and crops has proved to be complex and far-reaching, involving diverse stakeholder groups and many issues. Although the extent of global uptake of GM crops has been substantial (23 countries and 114...

  10. Low technology high tritium breeding blanket concept

    SciTech Connect (OSTI)

    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

    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.

  11. Reference repository design concept for bedded salt

    SciTech Connect (OSTI)

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

    1980-10-08T23:59:59.000Z

    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.

  12. Safety pharmacology — Current and emerging concepts

    SciTech Connect (OSTI)

    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

    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.

  13. 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...

  14. assessing modular concepts: Topics by E-print Network

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

    Metzner; Jazmine Cuevas; Chad A. Bousman; Thomas Patterson 57 Concept Mapping in Didactics of Informatics. Assessment as a Tool for Learning in Web-based and Computer...

  15. Quantum Structure in Cognition: Why and How Concepts are Entangled

    E-Print Network [OSTI]

    Diederik Aerts; Sandro Sozzo

    2013-09-08T23:59:59.000Z

    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.

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

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

    More Documents & Publications Thermodynamic Advantages of Low Temperature Combustion Engines Including the Use of Low Heat Rejection Concepts Are There Practical Approaches for...

  17. 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...

  18. 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:...

  19. Wave Energy Harvesting unmanned maritime vehicle, Concept and Applications

    E-Print Network [OSTI]

    Frandsen, Jannette B.

    Wave Energy Harvesting unmanned maritime vehicle, Concept and Applications Justin Manley Senior). By harvesting abundant natural energy Wave Gliders provide a persistent ocean presence to commercial scientific

  20. advanced combustion concepts: Topics by E-print Network

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

    1. Alan J. Toepfer 16 Combustion lean limits fundamentals and their application to a SI hydrogen-enhanced engine concept MIT - DSpace Summary: Operating an engine with excess...

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

    E-Print Network [OSTI]

    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

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

  2. Advanced Materials and Concepts for Portable Power Fuel Cells

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

    2010 Fuel Cell Projects Kick-off Meeting Washington, DC - September 28, 2010 Advanced Materials and Concepts for Portable Power Fuel Cells for Portable Power Fuel Cells Piotr...

  3. Development of a low swirl injector concept for gas turbines

    E-Print Network [OSTI]

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

    2000-01-01T23:59:59.000Z

    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

  4. 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)....

  5. affecting conception rate: 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)....

  6. Events and Periods as Concepts for Organizing Historical Knowledge

    E-Print Network [OSTI]

    Shaw, Ryan Benjamin

    2010-01-01T23:59:59.000Z

    example, he states that “feudalism has been discovered, notcounterpoint: What of the “feudalisms” throughout the worldcolligatory concepts, like feudalism they should be classi?

  7. 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...

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

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

    DRAFT U.S. DOE CLEAN ENERGY FINANCE GUIDE, THIRD EDITION DECEMBER 9, 2010 Chapter 5. Basic Concepts for Clean Energy Unsecured...

  9. How do particle physicists learn the programming concepts they need?

    E-Print Network [OSTI]

    Kluth, Stefan; Schoerner-Sadenius, Thomas; Steinbach, Peter

    2015-01-01T23:59:59.000Z

    The ability to read, use and develop code efficiently and successfully is a key ingredient in modern particle physics. We report the experience of a training program, identified as "Advanced Programming Concepts", that introduces software concepts, methods and techniques to work effectively on a daily basis in a HEP experiment or other programming intensive fields. This paper illustrates the principles, motivations and methods that shape the "Advanced Computing Concepts" training program, the knowledge base that it conveys, an analysis of the feedback received so far, and the integration of these concepts in the software development process of the experiments as well as its applicability to a wider audience.

  10. Modified shielding jet model for twin-jet shielding analysis

    E-Print Network [OSTI]

    Gilbride, Jennifer Frances

    1983-01-01T23:59:59.000Z

    MODIFIED SHIELDING JET MODEL FOR TWIN-JET SHIELDING ANALYSIS A Thesis by JENNIFER FRANCES GILBRIDE Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... August 1983 Major Subject: Mechanical Engineering MODIFIED SHIELDING JET MODEL FOR TWIN-JET SHIELDING ANALYSIS A Thesis by JENNIFER FRANCES GILBRIDE Approved as to stvle and content by: 'Carl H. Gerhold (Chairman of Committee) J. Craag Dutton...

  11. Solar System experiments do not yet veto modified gravity models

    E-Print Network [OSTI]

    Valerio Faraoni

    2006-07-05T23:59:59.000Z

    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.

  12. Method for modifying trigger level for adsorber regeneration

    DOE Patents [OSTI]

    Ruth, Michael J.; Cunningham, Michael J.

    2010-05-25T23:59:59.000Z

    A method for modifying a NO.sub.x 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.

  13. The Market Effect of a Food Scare: The Case of Genetically Modified StarLink Corn

    E-Print Network [OSTI]

    Carter, Colin A.; Smith, Aaron

    2004-01-01T23:59:59.000Z

    risk from genetically modified (GM) food. We analyze theof a Food Scare: The Case of Genetically Modified StarLinkof a Food Scare: The Case of Genetically Modified StarLink

  14. Energy Star Concepts for Highway Vehicles

    SciTech Connect (OSTI)

    Greene, D.L.

    2003-06-24T23:59:59.000Z

    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.

  15. Advanced progress concepts for direct coal liquefaction

    SciTech Connect (OSTI)

    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

    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.

  16. 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...

  17. advanced concept technology: Topics by E-print Network

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

    concept technology First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Memory Hierarchy: Advanced Concepts...

  18. Photovoltaic Pumping Systems A Comparison of Two Concepts

    E-Print Network [OSTI]

    Heinemann, Detlev

    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

  19. Lessons Learned in Applying Formal Concept Analysis to Reverse Engineering

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    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

  20. Is the New Economy a Useful Concept ? Bernard PAULR *

    E-Print Network [OSTI]

    Boyer, Edmond

    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

  1. EINDHOVEN STUDENTENSTAD (CONCEPT Beleidsnotitie) -versie 31 januari 2008

    E-Print Network [OSTI]

    Franssen, Michael

    1 12 EINDHOVEN STUDENTENSTAD (CONCEPT Beleidsnotitie) - versie 31 januari 2008 Joep Huiskamp;2/17 Eindhoven Studentenstad (CONCEPT Beleidsnotitie) ­ versie 31 januari 2008 12 Inleiding Studentenstad! In Eindhoven studeren ruim 24.000 studenten in het Hoger Onderwijs. Ongeveer 7.500 van hen doen dat aan de TU

  2. National Aeronautics and Space Administration Lunar Electric Rover Concept

    E-Print Network [OSTI]

    testing concepts for a new generation of rovers at sites around the country. These lunar rover concepts ­ winches, cable reels, backhoes, cranes and bulldozer blades ­ to be attached for special missions packages. Functional Requirements: · The LER must be able to hold a crew of two, but can support a crew

  3. Formalizing Concepts for Efficacy-aware Business Process Modeling

    E-Print Network [OSTI]

    Ulm, Universität

    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

  4. SPINNER ANEMOMETRY -AN INNOVATIVE WIND MEASUREMENT CONCEPT TF Pedersen*)

    E-Print Network [OSTI]

    SPINNER ANEMOMETRY - AN INNOVATIVE WIND MEASUREMENT CONCEPT TF Pedersen*) , N Sørensen, HA Madsen, R Møller, M Courtney, Risø National Laboratory P Enevoldsen, P Egedal, Siemens *) Risø, Wind Energy, fax +45 46 77 50 83 SUMMARY: An innovative and new concept for measurements of wind on a wind turbine

  5. DDD: A New Ensemble Approach For Dealing With Concept Drift

    E-Print Network [OSTI]

    Yao, Xin

    security, intelligent user interfaces, market-basket analysis, information filtering and predic- tion may change with time (concept drift). For example, in an information filtering system, the users may of the problem [7], [8]. Even though there are some ensemble approaches designed to handle concept drift, only

  6. National Aeronautics and Space Administration Portable Communication Terminal Concept

    E-Print Network [OSTI]

    Waliser, Duane E.

    National Aeronautics and Space Administration NASAfacts Portable Communication Terminal Concept NASA A Portable Communication Terminal Concept (PCT) serves as a "cell tower" for surface or in carrying and deploying a portable TTCN terminal that can be "dropped" on the surface for long periods

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

    E-Print Network [OSTI]

    Amsterdam, University of

    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

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

    E-Print Network [OSTI]

    Dragan, Feodor F.

    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

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

    E-Print Network [OSTI]

    Dragan, Feodor F.

    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

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

    E-Print Network [OSTI]

    Dragan, Feodor F.

    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

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

    E-Print Network [OSTI]

    Dragan, Feodor F.

    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

  12. Integrated autothermal reactor concepts for oxidative coupling and reforming of

    E-Print Network [OSTI]

    Twente, Universiteit

    #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

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

    E-Print Network [OSTI]

    Godin, Robert

    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

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

    E-Print Network [OSTI]

    Beck, Christian

    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

  15. Strategic Planning Concept Paper: NANOFLUIDS by M. Kostic Page 1 of 2 NIU Strategic Planning Concept Paper

    E-Print Network [OSTI]

    Kostic, Milivoje M.

    Strategic Planning Concept Paper: NANOFLUIDS by M. Kostic Page 1 of 2 NIU Strategic Planning Concept Paper: Novel Polymer-Nanofluids: NIU Wet-Nanotechnology Potential Identity: Milivoje Kostic and need for high-performance cooling. Nanofluids, stable colloidal mixtures of nanoparticles (including

  16. ANALYSIS OF OUT OF DATE MCU MODIFIER LOCATED IN SRNL

    SciTech Connect (OSTI)

    Crawford, C.

    2014-10-22T23:59:59.000Z

    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.

  17. Thermal cracking of rubber modified pavements, May 1995. Final report

    SciTech Connect (OSTI)

    Raad, L.; Yuan, X.; Saboundjian, S.

    1995-05-01T23:59:59.000Z

    In accordance with the original ISTEA mandate (1991) to use crumb tire rubber in pavements, Alaska would be required to use about 250 tons of used tire rubber starting in 1994 and increasing to about 1,000 tons of rubber in 1997 and each year thereafter. A number of pavements using crumb rubber modifiers have been built in the state and have been in service for periods of 8 to 15 years. Knowledge of the behavior of these rubber-modified pavements under extreme climate conditions, particularly in relation to their low temperature cracking resistance, is necessary for future design and construction of rubberized pavements in Alaska. This report presents results of a study to determine the low temperature cracking resistance of rubber modified pavements in Alaska in comparison with conventional asphalt concrete pavements.

  18. Method of detecting luminescent target ions with modified magnetic microspheres

    DOE Patents [OSTI]

    Shkrob, Ilya A; Kaminski, Michael D

    2014-05-13T23:59:59.000Z

    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.

  19. Impedimetric investigation of gold nanoparticles - guanine modified electrode

    SciTech Connect (OSTI)

    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

    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})

  20. Multiagent Coordination in Microgrids via Wireless Networks

    E-Print Network [OSTI]

    Shen, Xuemin "Sherman"

    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

  1. Lessons Learned from Microgrid Demonstrations Worldwide

    E-Print Network [OSTI]

    Marnay, Chris

    2014-01-01T23:59:59.000Z

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

  2. SPIDERS JCTD Smart Cyber-Secure Microgrids

    Broader source: Energy.gov [DOE]

    The Smart Power Infrastructure Demonstration for Energy Reliability and Security (SPIDERS) Joint Capability Technology Demonstration (JCTD) is a groundbreaking program to bolster the cyber security and energy efficiency of U.S. military installations and transfer the knowhow to non-military critical infrastructure.

  3. Lessons Learned from Microgrid Demonstrations Worldwide

    E-Print Network [OSTI]

    Marnay, Chris

    2014-01-01T23:59:59.000Z

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

  4. Lessons Learned from Microgrid Demonstrations Worldwide

    E-Print Network [OSTI]

    Marnay, Chris

    2014-01-01T23:59:59.000Z

    to the supply of a site’s energy demand is a combination ofhave a diverse set of energy demands in terms of heating,directly. Figure 13: Energy demand and supply display at MVV

  5. Advanced LVDC Electrical Power Architectures and Microgrids

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

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

  6. How Microgrids Work | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed off Energy.gov. Are you sure you want toworldPowerHome| DepartmentPumpHome Office

  7. Sandia Energy - Energy Surety Microgrid(tm)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Scienceand RequirementsCoatingsUltra-High-Voltage SiliconEnergy CouncilEnergy Surety HomeEnergy

  8. How Microgrids Work | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreaking of Blythe Solar PowerCommercialEnergy Star| DepartmentHow Gas

  9. 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 DataDepartment of Energy Your Density Isn't YourTransport(FactDepartment3311, 3312),

  10. Miniature modified Faraday cup for micro electron beams

    DOE Patents [OSTI]

    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

    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.

  11. Time Delay Predictions in a Modified Gravity Theory

    E-Print Network [OSTI]

    J. W. Moffat

    2006-06-01T23:59:59.000Z

    The time delay effect for planets and spacecraft is obtained from a fully relativistic modified gravity theory including a fifth force skew symmetric field by fitting to the Pioneer 10/11 anomalous acceleration data. A possible detection of the predicted time delay corrections to general relativity for the outer planets and future spacecraft missions is considered. The time delay correction to GR predicted by the modified gravity is consistent with the observational limit of the Doppler tracking measurement reported by the Cassini spacecraft on its way to Saturn, and the correction increases to a value that could be measured for a spacecraft approaching Neptune and Pluto.

  12. Differentiating Between Modified Gravity Theories in the Solar System

    E-Print Network [OSTI]

    Ali Mozaffari

    2014-03-21T23:59:59.000Z

    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.

  13. Modified gaseous atmospheres for storage of beef, lamb and pork

    E-Print Network [OSTI]

    Davis, George Theodore

    1979-01-01T23:59:59.000Z

    ) ( Member ) (He d of Depar ent) December 1979 ABSTRACT Modified Gaseous Atmospheres for Storage of Bee f, Pork and Lamb (December 1979) George Theodore Davis III, B. S. , Texas AsM University Co-Chairmen of Advisory Committee: Dr. Z. L. Carpenter...MODIFIED G'~. ' . . OUS ATMOSPHERI. S FOR STORAGE OI REEF, I. PMB AND PORK A Thesis by GEORGE THEODORE DAVIS I II Submitted to thc. graduate college of Texas AsM University in partial fulfillment of the rec, u. 'rement fox the degree...

  14. Modelling pitch accents for concept-to-speech synthesis. 

    E-Print Network [OSTI]

    Clark, Robert A J

    2003-01-01T23:59:59.000Z

    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 ...

  15. An innovative concept for deep water oil production platform design 

    E-Print Network [OSTI]

    Racine, Florian

    1994-01-01T23:59:59.000Z

    As more oil and gas are discovered in deep water, the offshore industry has become increasingly interested in the design of deep water offshore production facilities. A new design concept tentatively called FPSOT (Floating ...

  16. Generating Tensor Representation from Concept Tree in Meaning Based Search

    E-Print Network [OSTI]

    Panigrahy, Jagannath

    2011-08-08T23:59:59.000Z

    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...

  17. Concept-to-speech synthesis by phonological structure matching 

    E-Print Network [OSTI]

    Taylor, Paul

    2000-04-15T23:59:59.000Z

    This paper presents a new way of generating synthetic-speech waveforms from a linguistic description. The algorithm is presented as a proposed solution to the speech-generation problem in a concept-to-speech system. Off-line, ...

  18. Innovative Concept Appliances: Proposed Penalty (2010-CE-03/0415)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that Innovative Concept Appliances, LLC, failed to certify a variety of residential clothes washers and clothes dryers as compliant with the applicable energy conservation standards.

  19. 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...

  20. Medication concepts, records, and lists in electronic medical record systems

    E-Print Network [OSTI]

    Chang, Jaime

    2006-01-01T23:59:59.000Z

    A well-designed implementation of medication concepts, records, and lists in an electronic medical record (EMR) system allows it to successfully perform many functions vital for the provision of quality health care. A ...