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

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

E-Print Network [OSTI]

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

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

2

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

SciTech Connect (OSTI)

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

Dr. Mohammad S. Alam

2006-03-15T23:59:59.000Z

3

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

E-Print Network [OSTI]

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

Paderborn, Universität

4

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

E-Print Network [OSTI]

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

Kammen, Daniel M.

5

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

E-Print Network [OSTI]

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

Zeineldin, H. H.

6

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

E-Print Network [OSTI]

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

Paderborn, Universität

7

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

SciTech Connect (OSTI)

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

Udhay Ravishankar; Milos manic

2013-08-01T23:59:59.000Z

8

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

SciTech Connect (OSTI)

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

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

2010-12-01T23:59:59.000Z

9

Micro-Grids for Colonias (TX)  

SciTech Connect (OSTI)

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

Dean Schneider; Michael Martin; Renee Berry; Charles Moyer

2012-07-31T23:59:59.000Z

10

Energie-und Leistungsbilanzierung im MICRO GRID eines industriellen Produktionsstandortes mit  

E-Print Network [OSTI]

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

Paderborn, Universität

11

SMART FUEL CELL OPERATED RESIDENTIAL MICRO-GRID COMMUNITY  

SciTech Connect (OSTI)

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

Dr. Mohammad S. Alam (PI/PD)

2005-04-13T23:59:59.000Z

12

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

E-Print Network [OSTI]

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

Vasquez, Juan Carlos

13

Integration of Distributed Energy The CERTS MicroGrid Concept  

E-Print Network [OSTI]

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

14

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

E-Print Network [OSTI]

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

Prasanna, Viktor K.

15

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

E-Print Network [OSTI]

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

Diaconescu, Ada

16

Robust Networked Control Scheme for Distributed Secondary Control of Islanded MicroGrids  

E-Print Network [OSTI]

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

Vasquez, Juan Carlos

17

Messdatenerfassung und Kommunikation im MICRO GRID eines industriellen Produktionsstandortes  

E-Print Network [OSTI]

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

Paderborn, Universität

18

Development of a Smart MicroGrid Testbed  

SciTech Connect (OSTI)

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

Lee, Wei-Jen; Wetz, David

2013-04-25T23:59:59.000Z

19

Dynamic Reactive Power Control of Isolated Power Systems  

E-Print Network [OSTI]

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

Falahi, Milad

2012-10-03T23:59:59.000Z

20

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

E-Print Network [OSTI]

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

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


21

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

E-Print Network [OSTI]

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

Chen, Zhe

22

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

E-Print Network [OSTI]

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

Paderborn, Universität

23

Wirtschaftliche Bereitstellung von Netzdienstleistungen durch das MICRO GRID eines industriellen Produktionsstandortes  

E-Print Network [OSTI]

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

Paderborn, Universität

24

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

E-Print Network [OSTI]

on the factor graph utilizing real-time measurements from the smart metering devices. The result are experiencing a transformation of the power grid. The future smart grid [4] will bring advanced metering-time measurements. As more smart metering devices are being deployed on the grid, power system analysis is p

Kavcic, Aleksandar

25

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

E-Print Network [OSTI]

, low-head hydro units and geothermal systems and ii) battery storage, capacitor storage, low- and high regulation. I. INTRODUCTION DISTRIBUTED generation (DG) units, distributed storage (DS) units and integrated distributed generation/storage units constitute the broader family of distributed en- ergy resources (DR

Lehn, Peter W.

26

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

E-Print Network [OSTI]

an increasing demand for electric heating technolo- gies such as ground-source and air-source heat pumps (Dep, such as the electrification of home heating and vehi- cles, will need to be introduced. This increase in demand emmissions, the majority of which is a consequence of heating living spaces and water (Gov, 2009). Currently

Southampton, University of

27

A power beaming based infrastructure for space power  

SciTech Connect (OSTI)

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

Bamberger, J.A.

1991-08-01T23:59:59.000Z

28

Particle Swarm Optimization Based Reactive Power Optimization  

E-Print Network [OSTI]

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

Sujin, P R; Linda, M Mary

2010-01-01T23:59:59.000Z

29

Universal power transistor base drive control unit  

SciTech Connect (OSTI)

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

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

1988-01-01T23:59:59.000Z

30

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

E-Print Network [OSTI]

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

Tolbert, Leon M.

31

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

E-Print Network [OSTI]

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

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

32

Ultrahigh-Power Micrometre-Sized Supercapacitors Based on Onion...  

Office of Scientific and Technical Information (OSTI)

Ultrahigh-Power Micrometre-Sized Supercapacitors Based on Onion-Like Carbon Re-direct Destination: Electrochemical capacitors, also called supercapacitors, store energy in two...

33

Orbits design for Leo space based solar power satellite system.  

E-Print Network [OSTI]

?? Space Based Solar Power satellites use solar arrays to generate clean, green, and renewable electricity in space and transmit it to earth via microwave,… (more)

Addanki, Neelima Krishna Murthy

2011-01-01T23:59:59.000Z

34

Power Control for Crossbar-based Input-Queued Switches  

E-Print Network [OSTI]

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

35

Propeller based human powered swimming device  

E-Print Network [OSTI]

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

Bunker, Kristine (Kristine Alina)

2014-01-01T23:59:59.000Z

36

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

E-Print Network [OSTI]

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

Goldberg, Bennett

37

Probabilistic Vulnerability Assessment Based on Power Flow and Voltage Distribution  

SciTech Connect (OSTI)

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

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

2010-04-30T23:59:59.000Z

38

Power Management for Wireless Sensor Networks Based on Energy Budgets  

E-Print Network [OSTI]

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

Turau, Volker

39

AlGaN/GaN-based power semiconductor switches  

E-Print Network [OSTI]

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

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

2013-01-01T23:59:59.000Z

40

A market-power based model of business groups  

E-Print Network [OSTI]

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

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

2003-01-01T23:59:59.000Z

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


41

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

E-Print Network [OSTI]

cannot handle. The requirements include higher blocking voltages, switching frequencies, efficiency, and reliability. Material technologies superior to Si are needed for future power device developments. Silicon Carbide (SiC) based semiconductor devices...

Durrani, Yamin Qaisar

2005-11-01T23:59:59.000Z

42

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

SciTech Connect (OSTI)

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

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

2014-06-07T23:59:59.000Z

43

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

E-Print Network [OSTI]

Environmental Analysis of the Coal-based Power Production with Amine-based Carbon Capture J. To capture carbon dioxide from fossil fuel power plants and to store it in geological formations (CCS at the beginning. From an electricity generator's perspective the amine based carbon capture offers some advantages

44

Regression-Based RTL Power Modeling ALESSANDRO BOGLIOLO  

E-Print Network [OSTI]

introduce a low overhead on-line characterization method for enhancing the accuracy of off-line estimation is a key feature for synthesis-based design flows. The main challenge in establishing a sound RTL-up off-line characterization of regression-based power macromodels is discussed in detail. Moreover, we

De Micheli, Giovanni

45

Optimal Demand Response Based on Utility Maximization in Power Networks  

E-Print Network [OSTI]

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

Low, Steven H.

46

Base drive circuit for a four-terminal power Darlington  

DOE Patents [OSTI]

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

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

1983-01-01T23:59:59.000Z

47

Repowering flexibility of coal-based advanced power systems  

SciTech Connect (OSTI)

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

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

1995-03-01T23:59:59.000Z

48

Econophysical Dynamics of Market-Based Electric Power Distribution Systems  

E-Print Network [OSTI]

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

Nicolas Ho; David P. Chassin

2006-02-09T23:59:59.000Z

49

Development of Power-head based Fan Airflow Station  

E-Print Network [OSTI]

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

Wang, G.; Liu, M.

2005-01-01T23:59:59.000Z

50

High power light emitting diode based setup for photobleaching fluorescent impurities  

E-Print Network [OSTI]

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

Kaufman, Laura

51

Envelope amplifier design for wireless base-station power amplifiers  

E-Print Network [OSTI]

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

Hsia, Chin

2010-01-01T23:59:59.000Z

52

Fuel-cell based power generating system having power conditioning apparatus  

DOE Patents [OSTI]

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

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

2010-10-05T23:59:59.000Z

53

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

E-Print Network [OSTI]

presents a simulation model of a wind power plant based on a MW-level variable speed wind turbineAncillary Frequency Control of Direct Drive Full-Scale Converter Based Wind Power Plants Weihao Hu with a full-scale back-to-back power converter developed in the simulation tool of DIgSILENT Power Factory

Chen, Zhe

54

An Agent-Based Computational Laboratory for Wholesale Power Market Design  

E-Print Network [OSTI]

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

Tesfatsion, Leigh

55

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

E-Print Network [OSTI]

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

56

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

E-Print Network [OSTI]

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

Paris-Sud XI, Université de

57

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

E-Print Network [OSTI]

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

Cañizares, Claudio A.

58

INTEGRATED CONTROL OF NEXT GENERATION POWER SYSTEM  

SciTech Connect (OSTI)

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

None

2010-02-28T23:59:59.000Z

59

Transaction Based Power Flow Analysis For Transmission Utilization Allocation  

E-Print Network [OSTI]

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

60

Data bases for rapid response to power reactor problems  

SciTech Connect (OSTI)

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

Maskewitz, B.F.

1980-01-01T23:59:59.000Z

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


61

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

E-Print Network [OSTI]

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

Lavaei, Javad

62

Advanced power conversion based on the Aerocapacitor{trademark}  

SciTech Connect (OSTI)

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

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

1997-10-01T23:59:59.000Z

63

Simulation-based biagnostics and control for nuclar power plants  

SciTech Connect (OSTI)

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

Lee, J.C.

1993-01-01T23:59:59.000Z

64

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

E-Print Network [OSTI]

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

Mustakerov, Ivan

65

Model-Free Based Water Level Control for Hydroelectric Power Plants  

E-Print Network [OSTI]

Model-Free Based Water Level Control for Hydroelectric Power Plants CĂ©dric JOIN GĂ©rard ROBERT for hydroelectric run-of-the river power plants. To modulate power generation, a level trajectory is planned, the set-point is followed even in severe operating conditions. Keywords: Hydroelectric power plants

Paris-Sud XI, Université de

66

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

E-Print Network [OSTI]

of the electricity is produced by wind turbines and combined heat and power plants (CHPs). Most of them are connected heat and power plants. The investigation is based on 15 min average power measurements and load flow power losses in a distribution network with wind farms and CHPs 1 Introduction In Denmark, a large part

67

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

E-Print Network [OSTI]

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

John, Lizy Kurian

68

HeatProbe: a Thermal-based Power Meter System for Tracking Per-user Power Consumption  

E-Print Network [OSTI]

HeatProbe: a Thermal-based Power Meter System for Tracking Per-user Power Consumption Nan-Chen Chen Technology Innovation, Academic Sinica2 {b97006, b96118, b95701241}@csie.ntu.edu.tw, cwyou@citi.sinica.edu.tw, hchu@csie.ntu.edu.tw, mschen@citi.sinica.edu.tw Abstract. This paper proposes HeatProbe, a per

Chu, Hao-hua

69

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

E-Print Network [OSTI]

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

McLinko, Ryan M.

70

Reducing Electrical Power Use with a Performance Based Incentive  

SciTech Connect (OSTI)

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

M. Kathleen Nell

2004-07-01T23:59:59.000Z

71

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

E-Print Network [OSTI]

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

Potkonjak, Miodrag

72

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

E-Print Network [OSTI]

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

Shinozuka, Masanobu

73

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

E-Print Network [OSTI]

objective of Green Communication is to provide quality of service (QoS) at reduced energy consumptionPower-Optimal Scheduling for a Green Base Station with Delay Constraints Anusha Lalitha, Santanu with average delay constraint on the downlink of a Green Base- station. A Green Base-station is powered by both

Sharma, Vinod

74

Radioisotope-based Nuclear Power Strategy for Exploration Systems Development  

SciTech Connect (OSTI)

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

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

2006-01-20T23:59:59.000Z

75

Robust SAT-Based Search Algorithm for Leakage Power Reduction  

E-Print Network [OSTI]

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

Aloul, Fadi

76

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

E-Print Network [OSTI]

REFORMING PROCESSES FOR MICRO COMBINED HEAT AND POWER SYSTEM BASED ON SOLID OXIDE FUEL CELL University Denmark ABSTRACT Solid oxide fuel cell (SOFC) is a promising technology for decentralized power be theoretically improved through integration in power cycles; the low emissions; and the pos- sibility of using

Berning, Torsten

77

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

E-Print Network [OSTI]

is widely used in the wind power system for its advantages over other two types [5]. The characteristicsReactive power control of grid-connected wind farm based on adaptive dynamic programming Yufei Tang Wind farm Power system Adaptive control a b s t r a c t Optimal control of large-scale wind farm has

He, Haibo

78

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

E-Print Network [OSTI]

FC/Battery Power Management for Electric Vehicle Based Interleaved dc- dc Boost Converter Topology power systems in electric vehicle application, in order to decrease the FC current ripple. Therefore the performance of the FC system during transient and instantaneous peak power demands in electric vehicle

Paris-Sud XI, Université de

79

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

E-Print Network [OSTI]

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

Tesfatsion, Leigh

80

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

E-Print Network [OSTI]

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

Tesfatsion, Leigh

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


81

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

E-Print Network [OSTI]

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

Washington at Seattle, University of

82

SWRL as a rule language for ontology-based models in power plant design  

E-Print Network [OSTI]

SWRL as a rule language for ontology-based models in power plant design Virginie Fortineau1 management in an industrial context, and notably for power plant design, like the increase of data, actors. However, the design of power plants presents a specific issue, which is rules expression and validation

Paris-Sud XI, Université de

83

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

E-Print Network [OSTI]

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

Kimball, Jonathan W.

84

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

E-Print Network [OSTI]

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

85

PLC-Based Safety Critical Software Development for Nuclear Power Plants  

E-Print Network [OSTI]

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

86

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

DOE Patents [OSTI]

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

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

2013-02-05T23:59:59.000Z

87

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

DOE Patents [OSTI]

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

Archer, Charles J; Inglett, Todd A

2012-10-23T23:59:59.000Z

88

Genetic Algorithm Based Damage Control For Shipboard Power Systems  

E-Print Network [OSTI]

Power system level. The proposed method used a constrained binary genetic algorithm to find an optimal network configuration. An optimal network configuration is a configuration which restores all of the de-energized loads that are possible...

Amba, Tushar

2010-07-14T23:59:59.000Z

89

Shipboard condition based maintenance and integrated power system initiatives  

E-Print Network [OSTI]

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

Barber, Darrin E. (Darrin Eugene)

2011-01-01T23:59:59.000Z

90

Ground-based testing of space nuclear power plants  

SciTech Connect (OSTI)

Small nuclear power plants for space applications are evaluated according to their testability in this two part report. The first part introduces the issues involved in testing these power plants. Some of the concerns include oxygen embrittlement of critical components, the test environment, the effects of a vacuum environment on materials, the practically of racing an activated test chamber, and possible testing alternative the SEHPTR, king develop at the Idaho National Engineering Laboratory. 10 refs., 6 figs., 1 tab.

McDonald, T.G.

1990-10-22T23:59:59.000Z

91

Virginia Tech Comprehensive Power-Based Fuel Consumption Model: Modeling Diesel1 and Hybrid Buses2  

E-Print Network [OSTI]

Virginia Tech Comprehensive Power-Based Fuel Consumption Model: Modeling Diesel1 and Hybrid Buses2 is to extend the Virginia Tech Comprehensive Power-Based9 Fuel Consumption Model (VT-CPFM) to include diesel There are currently very few models for estimating diesel and hybrid bus fuel consumption and2 CO2 emission levels

Rakha, Hesham A.

92

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

E-Print Network [OSTI]

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

93

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

E-Print Network [OSTI]

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

Walker, James S.

94

Price-based adaptive spinning reserve requirements in power system scheduling1  

E-Print Network [OSTI]

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

Oren, Shmuel S.

95

SiC MOSFET Based Single Phase Active Boost Rectifier with Power Factor Correction for Wireless Power Transfer Applications  

SciTech Connect (OSTI)

Wireless Power Transfer (WPT) technology is a novel research area in the charging technology that bridges the utility and the automotive industries. There are various solutions that are currently being evaluated by several research teams to find the most efficient way to manage the power flow from the grid to the vehicle energy storage system. There are different control parameters that can be utilized to compensate for the change in the impedance due to variable parameters such as battery state-of-charge, coupling factor, and coil misalignment. This paper presents the implementation of an active front-end rectifier on the grid side for power factor control and voltage boost capability for load power regulation. The proposed SiC MOSFET based single phase active front end rectifier with PFC resulted in >97% efficiency at 137mm air-gap and >95% efficiency at 160mm air-gap.

Onar, Omer C [ORNL] [ORNL; Tang, Lixin [ORNL] [ORNL; Chinthavali, Madhu Sudhan [ORNL] [ORNL; Campbell, Steven L [ORNL] [ORNL; Miller (JNJ), John M. [JNJ-Miller PLC] [JNJ-Miller PLC

2014-01-01T23:59:59.000Z

96

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

SciTech Connect (OSTI)

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

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

1994-12-31T23:59:59.000Z

97

Modified Centrality Measure Based on Bidirectional Power Flow for Smart and Bulk Power  

E-Print Network [OSTI]

the directionality of power flow of future smart grid. Appli- cability of the proposed method has been evaluated smart and new technologies by utilities [1]. The scope of smart grid includes various generation options systems is the most lucrative part of smart grid from the point of view of regulating energy usage. Excess

Pota, Himanshu Roy

98

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

SciTech Connect (OSTI)

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

Alvin, M.A.

2002-09-19T23:59:59.000Z

99

Performance-degradation model for Li4Ti5O12-based battery cells used in wind power applications  

E-Print Network [OSTI]

1 Performance-degradation model for Li4Ti5O12-based battery cells used in wind power applications D the negative impact of wind power grid integration on the power system stability, which is caused. INTRODUCTION Future wind power plants (WPPs) are intended to function like todays conventional power plants

Teodorescu, Remus

100

Abstract--This paper proposes a stochastic wind power model based on an autoregressive integrated moving average (ARIMA)  

E-Print Network [OSTI]

, for instance to capture rare events such as extreme wind situations. Thus, stochastic wind power models1 Abstract-- This paper proposes a stochastic wind power model based on an autoregressive limits of stochastic wind power generation. The model is constructed based on wind power measurement

Bak-Jensen, Birgitte

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


101

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

E-Print Network [OSTI]

Scenario-Based Fault-Tolerant Model Predictive Control for Diesel-Electric Marine Power Plant where diesel gener- ator sets (a diesel engine connected to a generator) produce electrical power, which Email: torstein.bo@itk.ntnu.no, tor.arne.johansen@itk.ntnu.no Abstract--Diesel-electric propulsion

Johansen, Tor Arne

102

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

E-Print Network [OSTI]

Power factor correction of an electrical drive system based on multiphase machines Khoudir MAROUANI_tabache@yahoo.com Abstract--This paper deals with the energy efficiency improvement of an electrical drive which can be used both in wind energy conversion or motor drive applications. A power factor (PF) control scheme

Paris-Sud XI, Université de

103

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

E-Print Network [OSTI]

Anawake: Signal-Based Power Management For Digital Signal Processing Systems John Lazzaro and John@sst.ll.mit.edu Abstract Single-chip, low-power, programmable digital signal processing sys- tems are capable of hosting. 1. Introduction Single-chip programmable digital signal processing (DSP) systems (Figure 1

Lazzaro, John

104

Wind Farm Power Maximization Based On A Cooperative Static Game Approach  

E-Print Network [OSTI]

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

Stanford University

105

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

E-Print Network [OSTI]

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

Kuzmanovic, Aleksandar

106

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

E-Print Network [OSTI]

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

Arslan, Tughrul

107

Oxide based thermoelectric materials for large scale power generation  

E-Print Network [OSTI]

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

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

2008-01-01T23:59:59.000Z

108

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

E-Print Network [OSTI]

most state of the art reliability centered maintenance (RCM) approaches, but it also accounts equipment, maintenance, reliability, risk, security, optimization 1.Introduction Maintenance of bulk1 Risk-based Maintenance Allocation and Scheduling for Bulk Electric Power Transmission System

109

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

E-Print Network [OSTI]

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

110

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

E-Print Network [OSTI]

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

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

2013-01-01T23:59:59.000Z

111

Carbon nanotube-based nanorelays for low-power circuit applications  

E-Print Network [OSTI]

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

Schmitt, Courtney E

2009-01-01T23:59:59.000Z

112

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

E-Print Network [OSTI]

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

Kim, Guebuem

113

Identifications and Monitoring of Power System Dynamics Based on the PMUs and Wavelet Technique  

E-Print Network [OSTI]

Abstract—Low frequency power oscillations may be triggered by many events in the system. Most oscillations are damped by the system, but undamped oscillations can lead to system collapse. Oscillations develop as a result of rotor acceleration/deceleration following a change in active power transfer from a generator. Like the operations limits, the monitoring of power system oscillating modes is a relevant aspect of power system operation and control. Unprevented low-frequency power swings can be cause of cascading outages that can rapidly extend effect on wide region. On this regard, a Wide Area Monitoring, Protection and Control Systems (WAMPCS) help in detecting such phenomena and assess power system dynamics security. The monitoring of power system electromechanical oscillations is very important in the frame of modern power system management and control. In first part, this paper compares the different technique for identification of power system oscillations. Second part analyzes possible identification some power system dynamics behaviors Using Wide Area Monitoring Systems (WAMS) based on Phasor Measurement Units (PMUs) and wavelet technique. Keywords—Power system oscillations, Modal analysis, Prony, Wavelet, PMU, Wide Area Monitoring System.

Samir Avdakovic; Amir Nuhanovic

2010-01-01T23:59:59.000Z

114

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

SciTech Connect (OSTI)

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

Roark, D.

1997-03-05T23:59:59.000Z

115

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

DOE Patents [OSTI]

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

Taubman, Matthew S

2013-07-02T23:59:59.000Z

116

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

E-Print Network [OSTI]

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

Li, Husheng

2010-01-01T23:59:59.000Z

117

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

E-Print Network [OSTI]

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

Ducatelle, Frederick

118

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

SciTech Connect (OSTI)

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

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

1998-11-01T23:59:59.000Z

119

Space-Based Solar Power | Department of Energy  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy UsageAUDITVehicles »ExchangeDepartmentResolveFuture | DepartmentSoSpace-Based Solar

120

Radioisotope power system based on derivative of existing Stirling engine  

SciTech Connect (OSTI)

In a recent paper, the authors presented the results of a system design study of a 75-watt(c) RSG (Radioisotope Stirling Generator) for possible application to the Pluto Fast Flyby mission. That study was based on a Stirling engine design generated by MTI (Mechanical Technology, Inc.). The MTI design was a derivative of a much larger (13 kwe) engine that they had developed and tested for NASA`s LERC. Clearly, such a derivative would be a major extrapolation (downsizing) from what has actually been built and tested. To avoid that, the present paper describes a design for a 75-watt RSG system based on derivatives of a small (11-watt) engine and linear alternator system that has been under development by STC (Stirling Technology Company) for over three years and that has operated successfully for over 15,000 hours as of March 1995. Thus, the STC engines would require much less extrapolation from proven designs. The design employs a heat source consisting of two standard General Purpose Heat Source (GPHS) modules, coupled to four Stirling engines with linear alternators, any three of which could deliver the desired 75-watt(e) output if the fourth should fail. The four engines are coupled to four common radiators with redundant heatpipes for rejecting the engines` waste heat to space. The above engine and radiator redundancies promote system reliability. The paper describes detailed analyses to determine the effect of radiator geometry on system mass and performance, before and after an engine or heatpipe failure.

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

1995-12-31T23:59:59.000Z

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


121

ALGORITHM-BASED LOW-POWER TRANSFORM CODING ARCHITECTURES An-Yeu Wu and K. J. Ray Liu  

E-Print Network [OSTI]

ALGORITHM-BASED LOW-POWER TRANSFORM CODING ARCHITECTURES An-Yeu Wu and K. J. Ray Liu Electrical].In order to meet the low-power/high-throughputconstraint, the key issue is to "compensate" the increased. In this paper, we will show how to design algorithm- based low-power transform coding architectures using

Liu, K. J. Ray

122

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

E-Print Network [OSTI]

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

Liu, Liping

2012-01-01T23:59:59.000Z

123

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

E-Print Network [OSTI]

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

Mashayekh, Salman

2013-11-22T23:59:59.000Z

124

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

SciTech Connect (OSTI)

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

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

2014-11-15T23:59:59.000Z

125

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

E-Print Network [OSTI]

IEEE TRANSACTIONS ON POWER SYSTEMS 1 Web-based Security Cost Analysis in Electricity Markets Hong of transmission security constraints, transactions de- termined by market forces are feasible only when they are within the system's security limits. Thus, transactions in electricity markets need to be evaluated

Cañizares, Claudio A.

126

High-Power InP-based Waveguide Photodiodes and Photodiode Arrays Heterogeneously Integrated on SOI  

E-Print Network [OSTI]

High-Power InP-based Waveguide Photodiodes and Photodiode Arrays Heterogeneously Integrated on SOI evanescently-coupled modified uni-traveling carrier photodiodes (MUTC PDs) on silicon-on-insulator (SOI on silicon is a promising approach to realize high-performance photodiodes on a silicon photonics platform

Bowers, John

127

HeatProbe: A Thermal-based Power Meter for Accounting Disaggregated Electricity Usage  

E-Print Network [OSTI]

HeatProbe: A Thermal-based Power Meter for Accounting Disaggregated Electricity Usage Bo-Jhang Ho1 Technology Innovation, Academia Sinica 128, Sec. 2, Academia Rd., Taipei 115, Taiwan {cwyou, mschen}@citi.sinica.edu.tw ABSTRACT To promote energy-saving behavior, disaggregating elec- tricity usage is critical for increasing

Ouhyoung, Ming

128

Models for Impact Assessment of Wind-Based Power Generation on Frequency Control  

E-Print Network [OSTI]

the impact of different renewable penetration sce- narios on system frequency performance metrics. In order communication and control; new loads, such as plug-in hybrid electric vehicles (PHEV); advanced power- gration of new renewable-based electricity generation sources, e.g., wind and solar. Focusing on renewable

Liberzon, Daniel

129

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

E-Print Network [OSTI]

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

130

A New Model of Centrality Measure based on Bidirectional Power Flow for  

E-Print Network [OSTI]

power flow based model to evaluate the criticality in smart grid environment. Change in direction of smart grid includes various generation options, primarily in the distribution side ­ near consumers. Engagement of customers with the energy management systems is the most lucrative part of smart grid from

Pota, Himanshu Roy

131

Distributed Internet-based Load Altering Attacks against Smart Power Grids  

E-Print Network [OSTI]

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

Mohsenian-Rad, Hamed

132

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

E-Print Network [OSTI]

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

Boyer, Edmond

133

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

SciTech Connect (OSTI)

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

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

1996-03-01T23:59:59.000Z

134

An Experiment in Reducing Cellular Base Station Power Draw With Virtual Coverage  

E-Print Network [OSTI]

providers offer "low-power" GSM Base Stations (BTS) for use with renewable energy sources, these have permission and/or a fee. ACM DEV 4, December 06 -- 07 2013, Cape Town, South Africa Copyright is held. For example, the GSM Association estimates that 95% of people living without cellular access in East Africa

Parikh, Tapan S.

135

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

E-Print Network [OSTI]

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

Rakha, Hesham A.

136

Optimization of a Steady-State Tokamak-Based Power Plant  

E-Print Network [OSTI]

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

137

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

E-Print Network [OSTI]

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

Buyya, Rajkumar

138

PowerPedia A smartphone application for community-based electricity feedback  

E-Print Network [OSTI]

current consumption in real-time ­ How does my current consumption compare to my historical consumption1 PowerPedia ­ A smartphone application for community-based electricity feedback Smartphone 2010 Consumption highly depends on user behavior (more than factor 2). Energy consumption is intransparent

139

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

E-Print Network [OSTI]

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

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

2003-01-01T23:59:59.000Z

140

Reference concepts for a space-based hydrogen-oxygen combustion, turboalternator, burst power system  

SciTech Connect (OSTI)

This report describes reference concepts for a hydrogen-oxygen combustion, turboalternator power system that supplies power during battle engagement to a space-based, ballistic missile defense platform. All of the concepts are open''; that is, they exhaust hydrogen or a mixture of hydrogen and water vapor into space. We considered the situation where hydrogen is presumed to be free to the power system because it is also needed to cool the platform's weapon and the situation where hydrogen is not free and its mass must be added to that of the power system. We also considered the situation where water vapor is an acceptable exhaust and the situation where it is not. The combination of these two sets of situations required four different power generation systems, and this report describes each, suggests parameter values, and estimates masses for each of the four. These reference concepts are expected to serve as a baseline'' to which other types of power systems can be compared, and they are expected to help guide technology development efforts in that they suggest parameter value ranges that will lead to optimum system designs. 7 refs., 18 figs., 5 tabs.

Edenburn, M.W.

1990-07-01T23:59:59.000Z

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


141

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

SciTech Connect (OSTI)

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

Podder, A; Kapner, M; Morse, T

1981-02-01T23:59:59.000Z

142

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

E-Print Network [OSTI]

1 Control of single-phase islanded PV/battery streetlight cluster based on Power-Line Signaling and low power (typically microturbines, PV and batteries). Power electronics provide the control of each unit, i.e. a converter fed by a battery. Energy management control is essential in order to handle

Vasquez, Juan Carlos

143

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

E-Print Network [OSTI]

Energy management of power-split plug-in hybrid electric vehicles based on simulated annealing management method is proposed for a power-split plug-in hybrid electric vehicle (PHEV). Through analyzing and hybrid driving mode. During the pure electric driving mode, the vehicle is only powered by the battery

Mi, Chunting "Chris"

144

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

E-Print Network [OSTI]

for high power, continuous wave and polarized laser at 946 nm (fig1.c). We demonstrate a polarized laser. Laurell, "High-power, continous-wave, second harmonic generation at 532 nm in periodically poled KTiOPO4(b)(a) (c) High power single-crystal fiber CW 946 nm laser and blue generation based on Rubidium

Boyer, Edmond

145

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

SciTech Connect (OSTI)

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

Not Listed

2012-01-01T23:59:59.000Z

146

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

SciTech Connect (OSTI)

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

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

1985-01-01T23:59:59.000Z

147

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

SciTech Connect (OSTI)

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

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

2014-05-14T23:59:59.000Z

148

MULTILEVEL INVERTER, BASED ON MULTI-STAGE CONNECTION OF THREE-LEVEL CONVERTERS, SCALED IN POWER OF THREE.  

E-Print Network [OSTI]

MULTILEVEL INVERTER, BASED ON MULTI-STAGE CONNECTION OF THREE-LEVEL CONVERTERS, SCALED IN POWER. #12;MULTILEVEL INVERTER, BASED ON MULTI-STAGE CONNECTION OF THREE-LEVEL CONVERTERS, SCALED IN POWER, ConcepciĂłn, Chile ABSTRACT A multi-stage inverter using three-state converters is being analyzed

Catholic University of Chile (Universidad CatĂłlica de Chile)

149

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

E-Print Network [OSTI]

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

Paris-Sud XI, Université de

150

pCloud: A Cloud-based Power Market Simulation Environment  

SciTech Connect (OSTI)

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

Rudkevich, Aleksandr; Goldis, Evgeniy

2012-12-02T23:59:59.000Z

151

Recent progress in zirconia-based fuel cells for power generation  

SciTech Connect (OSTI)

High temperature solid oxide fuel cells based upon yttria-stabilized zirconia electrolyte offer a clean, pollution-free technology to electrochemically generate electricity at high efficiencies. This paper reviews the designs, materials and fabrication processes used for such fuel cells. Most progress to date has been achieved with tubular geometry cells. A large number of tubular cells have been electrically tested, some to times up to 30,000 hours; these cells have shown excellent performance and performance stability. In addition, successively larger size electric generators utilizing these cells have been designed, built and operated since 1984. Two 25 kW power generation field test units have recently been fabricated; these units represent a major milestone in the commercialization of zirconia-based fuel cells for power generation.

Singhal, S.C.

1992-12-01T23:59:59.000Z

152

Recent progress in zirconia-based fuel cells for power generation  

SciTech Connect (OSTI)

High temperature solid oxide fuel cells based upon yttria-stabilized zirconia electrolyte offer a clean, pollution-free technology to electrochemically generate electricity at high efficiencies. This paper reviews the designs, materials and fabrication processes used for such fuel cells. Most progress to date has been achieved with tubular geometry cells. A large number of tubular cells have been electrically tested, some to times up to 30,000 hours; these cells have shown excellent performance and performance stability. In addition, successively larger size electric generators utilizing these cells have been designed, built and operated since 1984. Two 25 kW power generation field test units have recently been fabricated; these units represent a major milestone in the commercialization of zirconia-based fuel cells for power generation.

Singhal, S.C.

1992-01-01T23:59:59.000Z

153

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

E-Print Network [OSTI]

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

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

2012-01-01T23:59:59.000Z

154

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

E-Print Network [OSTI]

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

Boyer, Edmond

155

A Knowledge-Based Approach for Power-Plant Availability Analysis  

E-Print Network [OSTI]

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

Reddy, A. Chandra Shekar

1988-01-01T23:59:59.000Z

156

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

E-Print Network [OSTI]

with energy storage in wind power generation,” in Proc. ofside management for wind power integration in microgridstorage coordinated with wind power under electricity market

Taylor, Zachariah David

2014-01-01T23:59:59.000Z

157

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

E-Print Network [OSTI]

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

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

2013-01-01T23:59:59.000Z

158

538 IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 20, NO. 2, MAY 2005 Modern Laboratory-Based Education for Power  

E-Print Network [OSTI]

drives. To address this need in a revised electric machinery cur- riculum, we asked the question, "What for Power Electronics and Electric Machines Robert S. Balog, Student Member, IEEE, Zakdy Sorchini, Student be an integral component of a power electronics and electric machines curriculum. However, before a single watt

Kimball, Jonathan W.

159

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

SciTech Connect (OSTI)

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

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

2014-05-15T23:59:59.000Z

160

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

SciTech Connect (OSTI)

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

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

2010-03-30T23:59:59.000Z

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


161

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

SciTech Connect (OSTI)

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

Omitaomu, Olufemi A [ORNL] [ORNL

2014-01-01T23:59:59.000Z

162

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

E-Print Network [OSTI]

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

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

2013-01-01T23:59:59.000Z

163

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

SciTech Connect (OSTI)

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

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

2008-01-01T23:59:59.000Z

164

Radiation power and linewidth of a semifluxon-based Josephson oscillator  

SciTech Connect (OSTI)

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

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

2014-02-10T23:59:59.000Z

165

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

SciTech Connect (OSTI)

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

Chen, Yousu; Huang, Zhenyu

2014-08-31T23:59:59.000Z

166

Power combination of two phase-locked high power microwave beams from a new coaxial microwave source based on dual beams  

SciTech Connect (OSTI)

The new coaxial high power microwave source based on dual beams has demonstrated two phase-locked output microwave beams generated by its two sub-sources. In order to achieve a single higher output power, we present a three-port waveguide-based power combiner to combine the two microwave beams. Particle-in-cell simulation results show that when the diode voltage is 675?kV and the guiding magnetic field is 0.8?T, a combined microwave with an average power of about 4.0?GW and a frequency of 9.74 GHz is generated; the corresponding power conversion efficiency is 29%. The combination effect of the combiner is further validated in the diode voltage range from 675?kV to 755?kV as well as in the pulse regime. The simulations indicate that the maximum surface axial electric field strength of the electrodynamic structure is 720?kV/cm, which is relatively low corresponding to an output power of 4.0?GW. The stable combined output suggests the probability of long-pulse operation for the combined source.

Li, Yangmei; Zhang, Xiaoping, E-mail: plinafly@163.com; Zhang, Jiande; Dang, Fangchao; Yan, Xiaolu [College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073 (China)

2014-10-15T23:59:59.000Z

167

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

E-Print Network [OSTI]

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

Kumar, Ratnesh

168

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

E-Print Network [OSTI]

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

Birmingham, University of

169

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

E-Print Network [OSTI]

Short-term Wind Power Prediction for Offshore Wind Farms - Evaluation of Fuzzy-Neural Network Based of wind power capacities are likely to take place offshore. As for onshore wind parks, short-term wind of offshore farms and their secure integration to the grid. Modeling the behavior of large wind farms

Paris-Sud XI, Université de

170

Design optimization methodology for power converters based on global energy requirement criteria. Application to a DC-DC flyback structure  

E-Print Network [OSTI]

for power electronic converters according to the Global Energy Requirement (GER) criterion, i.e. the primary-design converters in order to take its environmental impacts (here, only its global primary energy consumptionDesign optimization methodology for power converters based on global energy requirement criteria

Paris-Sud XI, Université de

171

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

E-Print Network [OSTI]

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

Tesfatsion, Leigh

172

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

E-Print Network [OSTI]

for power utilities is the optimal power flow (OPF) problem which was introduced in 1962 by the French engineer Jules Carpentier [7]. A power utility may own power generating plants fueled by coal, natural gas absorbed by the loads plus the power losses that occur in the transmission system. Second, both the active

Simon, Dan

173

A practical approach to risk-based inservice inspection in U.S. nuclear power plants  

SciTech Connect (OSTI)

To provide guidelines for practical implementation of risk-based ISI, EPRI sponsored work to develop evaluation procedures and criteria for defining risk-based inservice inspection programs for nuclear power plant piping. These procedures and criteria include efficient means to identify risk significant piping segments, inspection locations, and available inspection techniques. These procedures were applied in a pilot study to assess the feasibility of successfully implementing risk-based inservice inspection programs at nuclear plants. The results from the pilot study indicate that implementation of risk-based inservice inspection programs can reduce the cost and radiation exposure associated with inservice inspection, while maintaining a high level of safety. The list of references provides additional details of these procedures and plant-specific applications. Also, an EPRI technical report has been published to document these procedures. Software has been developed to support and fully document this procedure. Additional development is adding an expert system to the present data base system. The approach compares well to approaches used (or being considered) in other industries and can easily be adapted to these other industries and to address economic and personnel safety in addition to public safety measures.

Gosselin, S.R. [Electric Power Research Inst., Charlotte, NC (United States); Gamble, R. [Sartrex Corp., Rockville, MD (United States); Dimitrijevic, V.B.; O`Regan, P.J.; Chapman, J.R. [Yankee Atomic Electric Co., Bolton, MS (United States)

1996-12-01T23:59:59.000Z

174

A Silicon-Based Micro Gas Turbine Engine for Power Generation  

E-Print Network [OSTI]

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

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

2007-01-01T23:59:59.000Z

175

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

SciTech Connect (OSTI)

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

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

2012-01-01T23:59:59.000Z

176

Envelope amplifier for broadband base-station envelope tracking power amplifier  

E-Print Network [OSTI]

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

Zhu, Qiuyao

2011-01-01T23:59:59.000Z

177

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

E-Print Network [OSTI]

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

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

2013-01-01T23:59:59.000Z

178

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

E-Print Network [OSTI]

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

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

2013-01-01T23:59:59.000Z

179

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

SciTech Connect (OSTI)

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

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

1995-12-01T23:59:59.000Z

180

Silicon-on-insulator-based high-voltage, high-temperature integrated circuit gate driver for silicon carbide-based power field effect transistors  

SciTech Connect (OSTI)

Silicon carbide (SiC)-based field effect transistors (FETs) are gaining popularity as switching elements in power electronic circuits designed for high-temperature environments like hybrid electric vehicle, aircraft, well logging, geothermal power generation etc. Like any other power switches, SiC-based power devices also need gate driver circuits to interface them with the logic units. The placement of the gate driver circuit next to the power switch is optimal for minimising system complexity. Successful operation of the gate driver circuit in a harsh environment, especially with minimal or no heat sink and without liquid cooling, can increase the power-to-volume ratio as well as the power-to-weight ratio for power conversion modules such as a DC-DC converter, inverter etc. A silicon-on-insulator (SOI)-based high-voltage, high-temperature integrated circuit (IC) gate driver for SiC power FETs has been designed and fabricated using a commercially available 0.8--m, 2-poly and 3-metal bipolar-complementary metal oxide semiconductor (CMOS)-double diffused metal oxide semiconductor (DMOS) process. The prototype circuit-s maximum gate drive supply can be 40-V with peak 2.3-A sourcing/sinking current driving capability. Owing to the wide driving range, this gate driver IC can be used to drive a wide variety of SiC FET switches (both normally OFF metal oxide semiconductor field effect transistor (MOSFET) and normally ON junction field effect transistor (JFET)). The switching frequency is 20-kHz and the duty cycle can be varied from 0 to 100-. The circuit has been successfully tested with SiC power MOSFETs and JFETs without any heat sink and cooling mechanism. During these tests, SiC switches were kept at room temperature and ambient temperature of the driver circuit was increased to 200-C. The circuit underwent numerous temperature cycles with negligible performance degradation.

Tolbert, Leon M [ORNL; Huque, Mohammad A [ORNL; Blalock, Benjamin J [ORNL; Islam, Syed K [ORNL

2010-01-01T23:59:59.000Z

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


181

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

SciTech Connect (OSTI)

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

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

1989-01-01T23:59:59.000Z

182

MODEL AND BEAM BASED SETUP PROCEDURES FOR A HIGH POWER HADRON SUPERCONDUCTING LINAC  

SciTech Connect (OSTI)

This presentation will review methods for experimental determination of optimal operational set points in a multi-cavity superconducting high power hadron linac. A typical tuning process is based on comparison between measured data and the results of simulations from envelope and single-particle models. Presence of significant space charge effects requires simulation and measurement of bunch dynamics in 3 dimensions to ensure low loss beam transport. This is especially difficult in a superconducting linac where use of interceptive diagnostics is usually restricted because of the risk of SRF cavity surface contamination. The procedures discussed here are based on non-interceptive diagnostics such as beam position monitors and laser wires, and conventional diagnostics devices such as wire scanners and bunch shape monitors installed outside the superconducting linac. The longitudinal Twiss analysis based on the BPM signals will be described. The superconducting SNS linac tuning experience will be used to demonstrate problems and their solution for real world linac tune-up procedures

Shishlo, Andrei P [ORNL

2014-01-01T23:59:59.000Z

183

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

E-Print Network [OSTI]

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

Ding, Yu

2006-01-01T23:59:59.000Z

184

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

E-Print Network [OSTI]

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

Stefanopoulou, Anna

185

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

DOE Patents [OSTI]

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

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

2014-04-22T23:59:59.000Z

186

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

SciTech Connect (OSTI)

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

None

2012-02-24T23:59:59.000Z

187

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

E-Print Network [OSTI]

also be used very This work was supported in part by the Power Systems Engineering Research Center1 Abstract--This paper describes a web-based electric power market simulation tool called POWERWEB structure with the operational and reliability aspects of the underlying power system. Index Terms--Power

188

COMPUTER-BASED PROCEDURE FOR FIELD ACTIVITIES: RESULTS FROM THREE EVALUATIONS AT NUCLEAR POWER PLANTS  

SciTech Connect (OSTI)

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

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

2014-09-01T23:59:59.000Z

189

Development of a Web-based Emissions Reduction Calculator for Green Power Purchases from Texas Wind Energy Providers  

E-Print Network [OSTI]

DEVELOPMENT OF A WEB-BASED, EMISSIONS REDUCTION CALCULATOR FOR GREEN POWER PURCHASES FROM TEXAS WIND ENERGY PROVIDERS Zi Liu, Ph.D. Research Engineer Jeff S. Haberl, Ph.D., P.E. Professor/Assc. Director Juan... that have been developed to calculate the emissions reductions from electricity provided by wind energy providers in the Texas ERCOT region, including an analysis of actual hourly wind power generated from a wind turbine in Randall County, Texas...

Liu, Z.; Baltazar-Cervantes, J. C.; Gilman, D.; Haberl, J.; Culp, C.

2005-01-01T23:59:59.000Z

190

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

SciTech Connect (OSTI)

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

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

1988-01-01T23:59:59.000Z

191

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

SciTech Connect (OSTI)

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

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

2014-01-01T23:59:59.000Z

192

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

E-Print Network [OSTI]

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

Marton, Christopher Henry

2011-01-01T23:59:59.000Z

193

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

E-Print Network [OSTI]

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

Taylor, Zachariah David

2014-01-01T23:59:59.000Z

194

Power system fault analysis based on intelligent techniques and intelligent electronic device data  

E-Print Network [OSTI]

This dissertation has focused on automated power system fault analysis. New contributions to fault section estimation, protection system performance evaluation and power system/protection system interactive simulation have been achieved. Intelligent...

Luo, Xu

2007-09-17T23:59:59.000Z

195

E-Print Network 3.0 - active-power-filter topology based Sample...  

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

and Plants 10 48 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 17, NO. 1, JANUARY 2002 A New Hybrid Active Power Filter (APF) Topology Summary: --In this paper, a new hybrid active...

196

Electric load information system based on non-intrusive power monitoring  

E-Print Network [OSTI]

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

Lee, Kwangduk Douglas, 1970-

2003-01-01T23:59:59.000Z

197

Control of a wind power system based on a tethered wing  

E-Print Network [OSTI]

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

Paris-Sud XI, Université de

198

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

E-Print Network [OSTI]

. Keywords--Distributed generation, wind power integration, plug-in electric vehicles, reactive power]. In [6], Li et al. used stochastic programming to obtain the optimal plug-in electric vehicle (PEV) power be compensated locally, we consider a scenario where a wind DG unit is co-located with a plug-in electric vehicle

Huang, Jianwei

199

Estimation of A Sensitivity-Based Metric for Detecting Market Power  

E-Print Network [OSTI]

Science Foundation Power Systems Engineering Research Center (PSERC). H. Oh and R. J. Thomas (PTDF) matrix . I. INTRODUCTION f a market is competitive the electric power generated by others can substitute for the electric power provided by any generator. However, it is possible that a generator

200

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

SciTech Connect (OSTI)

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

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

1997-12-31T23:59:59.000Z

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


201

Microsoft PowerPoint - ITA Webinar_Miller_APPROVED_2009_09_04...  

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

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

202

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

SciTech Connect (OSTI)

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

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

1992-06-01T23:59:59.000Z

203

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

E-Print Network [OSTI]

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

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

2014-01-01T23:59:59.000Z

204

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

SciTech Connect (OSTI)

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

Not Available

1980-04-01T23:59:59.000Z

205

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

E-Print Network [OSTI]

of about 1 watt without considering thermoelectric cooler (TEC), which is used to normalize the power consumption of the various 400 GbE modulation format schemes considered here. The transceiver power consumption for each scheme takes into account all... , 39, 1402–1405, (2014). [13] J. J. Lee, et al., “Predication of TEC Power Consumption for Cooled Laser Diode Module,” in proceeding of LEOS, Paper WW3, (2004). Acknowledgments This work was supported by UK EPSRC via the INTERNET project. ...

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

2014-07-17T23:59:59.000Z

206

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

SciTech Connect (OSTI)

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

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

2009-12-31T23:59:59.000Z

207

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

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

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

208

Incorporating DFIG-Based Wind Power Generator in Microgird Frequency Stabilization.  

E-Print Network [OSTI]

??Although wind power as a renewable energy is assumed to be an all-round advantageous source of energy, its intermittent nature can cause difficulties, especially in… (more)

Fakhari Moghadam Arani, Mohammadreza

2012-01-01T23:59:59.000Z

209

Power control architectures for cold cathode fluorescent lamp and light emitting diode based light sources.  

E-Print Network [OSTI]

?? In this dissertation, two different energy efficient power supply topologies are introduced for controlling cold cathode fluorescent lamp (CCFL) and high-brightness light emitting diode… (more)

Doshi, Montu V.

2010-01-01T23:59:59.000Z

210

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

E-Print Network [OSTI]

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

Taylor, Zachariah David

2014-01-01T23:59:59.000Z

211

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

E-Print Network [OSTI]

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

Burak Kocuk

2014-12-19T23:59:59.000Z

212

PAPER ACCEPTED TO THE IEEE TRANSACTIONS ON POWER SYSTEMS 1 Sensitivity-based Security-constrained OPF Market  

E-Print Network [OSTI]

PAPER ACCEPTED TO THE IEEE TRANSACTIONS ON POWER SYSTEMS 1 Sensitivity-based Security-constrained OPF Market Clearing Model F. Milano, Member, IEEE, C. A. Ca~nizares, Senior Member, IEEE, and A. J constraints that properly include voltage stability limits in the operation of competitive electricity markets

Cañizares, Claudio A.

213

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

E-Print Network [OSTI]

impact of distribution level wind turbines. Our design is based on a nonlinear power flow analysis of wind turbines to support their induction load to avoid generator voltage excursion. Note that, although-sized wind turbines in large wind farms [1], the smaller wind turbines that are used at the distribution

Huang, Jianwei

214

On-Chip Copper-Based vs. Optical Interconnects: Delay Uncertainty, Latency, Power, and Bandwidth Density Comparative Predictions  

E-Print Network [OSTI]

On-Chip Copper-Based vs. Optical Interconnects: Delay Uncertainty, Latency, Power, and Bandwidth. Albonesi, Philippe M. Fauchet, and Eby G. Friedman Department of Electrical and Computer Engineering of Rochester, Rochester, New York, 14627 Department of Electrical and Computer Engineering,Cornell University

Friedman, Eby G.

215

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 12, NO. 1, JANUARY 1997 87 Fuzzy Logic Based Intelligent Control of a Variable  

E-Print Network [OSTI]

system. The generation system has fuzzy logic control with vector control in the inner loops. A fuzzyIEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 12, NO. 1, JANUARY 1997 87 Fuzzy Logic Based a variable speed wind genera- tion system where fuzzy logic principles are used for efficiency optimization

Simões, Marcelo Godoy

216

Low Power Body Sensor Network for Wireless ECG Based on Relaying of Creeping Waves at 2.4GHz1  

E-Print Network [OSTI]

Low Power Body Sensor Network for Wireless ECG Based on Relaying of Creeping Waves at 2.4GHz1 Engineering Rochester Institute of Technology Abstract- A wireless communication platform for ECG operating applications that demand higher data rates than ECG.1 I. INTRODUCTION The Electrocardiogram (ECG) [1

Tsouri, Gill

217

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

E-Print Network [OSTI]

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

Hung, Shih-Hao

218

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

SciTech Connect (OSTI)

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

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

2012-04-30T23:59:59.000Z

219

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

E-Print Network [OSTI]

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

Paris-Sud XI, Université de

220

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

E-Print Network [OSTI]

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

Geyer, Hartmut

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


221

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

E-Print Network [OSTI]

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

Eilenberg, Michael Frederick

2009-01-01T23:59:59.000Z

222

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

E-Print Network [OSTI]

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

Gunasekaran, Surekha

2013-01-01T23:59:59.000Z

223

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

E-Print Network [OSTI]

outages and other power quality and reliability events to be 1% of GDP, or $100 billion per year [4 infrastructure that includes renewable or sustainable energy sources [1][2]. The existing energy management

Tolbert, Leon M.

224

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

E-Print Network [OSTI]

power fluctuations: the pv plant as a low pass filter,"point sensor to the entire PV plant at each timescale isWVM Inputs WVM Outputs PV Plant Footprint Density of PV

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

2013-01-01T23:59:59.000Z

225

The design of future central receiver power plants based on lessons learned from the Solar One Pilot Plant  

SciTech Connect (OSTI)

The 10-MW{sub e} Solar One Pilot Plant was the world's largest solar central receiver power plant. During its power production years it delivered over 37,000 MWhrs (net) to the utility grid. In this type of electric power generating plant, large sun-tracking mirrors called heliostats reflect and concentrate sunlight onto a receiver mounted on top a of a tower. The receiver transforms the solar energy into thermal energy that heats water, turning it into superheated steam that drives a turbine to generate electricity. The Solar One Pilot Plant successfully demonstrated the feasibility of generating electricity with a solar central receiver power plant. During the initial 2 years the plant was tested and 4 years the plant was operated as a power plant, a great deal of data was collected relating to the efficiency and reliability of the plant's various systems. This paper summarizes these statistics and compares them to goals developed by the US Department of Energy. Based on this comparison, improvements in the design and operation of future central receiver plants are recommended. Research at Sandia National Laboratories and the US utility industry suggests that the next generation of central receiver power plants will use a molten salt heat transfer fluid rather than water/steam. Sandia has recently completed the development of the hardware needed in a molten salt power plant. Use of this new technology is expected to solve many of the performance problems encountered at Solar One. Projections for the energy costs from these future central receiver plants are also presented. For reference, these projections are compared to the current energy costs from the SEGS parabolic trough plants now operating in Southern California.

Kolb, G.J.

1991-01-01T23:59:59.000Z

226

Potential Environmental Impacts of Hydrogen-based Transportation and Power Systems  

SciTech Connect (OSTI)

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

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

2010-12-31T23:59:59.000Z

227

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

SciTech Connect (OSTI)

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

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

1998-01-01T23:59:59.000Z

228

A SiC MOSFET Based Inverter for Wireless Power Transfer Applications  

SciTech Connect (OSTI)

In a wireless power transfer (WPT) system, efficiency of the power conversion stages is crucial so that the WPT technology can compete with the conventional conductive charging systems. Since there are 5 or 6 power conversion stages, each stage needs to be as efficient as possible. SiC inverters are crucial in this case; they can handle high frequency operation and they can operate at relatively higher temperatures resulting in reduces cost and size for the cooling components. This study presents the detailed power module design, development, and fabrication of a SiC inverter. The proposed inverter has been tested at three center frequencies that are considered for the WPT standardization. Performance of the inverter at the same target power transfer level is analyzed along with the other system components. In addition, another SiC inverter has been built in authors laboratory by using the ORNL designed and developed SiC modules. It is shown that the inverter with ORNL packaged SiC modules performs simular to that of the inverter having commercially available SiC modules.

Onar, Omer C [ORNL] [ORNL; Chinthavali, Madhu Sudhan [ORNL] [ORNL; Campbell, Steven L [ORNL] [ORNL; Ning, Puqi [Chinese Academy of Sciences (CAS)] [Chinese Academy of Sciences (CAS); White, Cliff P [ORNL] [ORNL; Miller (JNJ), John M. [JNJ-Miller PLC] [JNJ-Miller PLC

2014-01-01T23:59:59.000Z

229

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

E-Print Network [OSTI]

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

Boyer, Edmond

230

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

DOE Patents [OSTI]

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

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

2013-12-24T23:59:59.000Z

231

Constraint-based Evolutionary QoS Adaptation for Power Utility Communication Networks  

E-Print Network [OSTI]

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

Suzuki, Jun

232

Pumped storage for hydroelectric power. (Latest citations from Fluidex data base). Published Search  

SciTech Connect (OSTI)

The bibliography contains citations concerning the design, development, construction, and characteristics of surface and underground pumped storage for hydroelectric power. Pumped storage projects and facilities worldwide are referenced. There is some consideration of research and experimental results of pumped storage studies, as well as modeling. (Contains a minimum of 192 citations and includes a subject term index and title list.)

Not Available

1992-09-01T23:59:59.000Z

233

Partition Based Cascaded Generator Scheduling with Constraints for Large Power Networks  

E-Print Network [OSTI]

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

Kundur, Deepa

234

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

E-Print Network [OSTI]

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

Bahk, Saewoong

235

Journal of Power Sources 161 (2006) 12881296 Crosslinkable fumed silica-based nanocomposite  

E-Print Network [OSTI]

in battery technology have not kept pace with the power requirements of these electrical devices. Solid electrolytes for rechargeable lithium batteries Yangxing Li, Jeffrey A. Yerian, Saad A. Khan, Peter S. Fedkiw Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695

Khan, Saad A.

236

Algorithm-Based Low-Power and High-Performance Multimedia Signal Processing  

E-Print Network [OSTI]

-power and high-performance signal-processing systems. The proposed multirate design methodology is systematic and to show that the multirate approach is an effective and systematic design methodology to achieve low design, motion estimation, multirate processing, parallel architectures, Reed­Solomon codes, video coding

Hung, Shih-Hao

237

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

E-Print Network [OSTI]

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

Cañizares, Claudio A.

238

Low Power BIST Based on Scan Partitioning Jinkyu Lee and Nur A. Touba  

E-Print Network [OSTI]

, touba}@ece.utexas.edu Abstract A built-in self-test (BIST) scheme is presented which both reduces while also significantly reducing the power dissipation. Weighted pattern testing has been well studied reduce hardware overhead for weighted random test and increase fault coverage compared

Touba, Nur A.

239

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

E-Print Network [OSTI]

Membrane Fuel Cell Stack (PEMFCS) is first proposed. This equivalent circuit model of the fuel cell stack is derived by a frequency response analysis (FRA) technique to evaluate the effects of the ripple current generated by the power-conditioning unit...

Choi, Woojin

2005-11-01T23:59:59.000Z

240

NONLINEAR-CARRIER CONTROL FOR HIGH-POWER-FACTOR RECTIFIERS BASED ON  

E-Print Network [OSTI]

, flyback, Cuk and Sepic converters offer the benefits of single-stage transformer isolation, voltage step-up-power- factor rectification. A simple exponential carrier waveform generator is described. Using the NLC con generator is discussed in Section 4. Design-oriented har- monic distortion analysis and modeling aspects

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


241

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

E-Print Network [OSTI]

pack and a solar This research was sponsored by DARPA under contract F33615- 00-1-1719 Permission-89791-88-6/97/05...$5.00. panel to operate under extremely harsh weather and power condi- tions for hundreds of days. Such systems

Chou, Pai H.

242

Reliable GPS-Based Timing for Power Systems: A Multi-Layered Multi-Receiver Architecture  

E-Print Network [OSTI]

a victim receiver's reported position, time, or both. In a future scenario where PMU data play signal and data process- ing; most of the countermeasures exploit the static and networked nature of time measurement unit (PMU), also known as synchrophasor, is a device capable of measuring power system voltage

Gao, Grace Xingxin

243

Utility-based Time and Power Allocation on an Energy Harvesting Downlink: The Optimal  

E-Print Network [OSTI]

problem where the transmitter is aware of the energy arrival statistics of a frame before the frame starts harvest energy through solar cells, vibration absorption devices, thermoelectric generators, wind power on optimizing data transmission with an energy harvesting transmitter. A single-user communication system op

Uysal-Biyikoglu, Elif

244

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

E-Print Network [OSTI]

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

Simões, Marcelo Godoy

245

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

E-Print Network [OSTI]

of the speech power and the estimation of the clean speech. We show that the proposed SPP approach maintains Agreement PIAP-GA-2008-214699 AUDIS and the Dutch Technology Foundation STW. T. Gerkmann heads the Speech Signal Processing Group, Universit¨at Olden- burg, 26111 Oldenburg, Germany, email: timo

246

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

DOE Patents [OSTI]

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

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

2001-01-01T23:59:59.000Z

247

www.jatit.org ARTIFICIAL INTELLIGENCE BASED TUNING OF SVC CONTROLLER FOR CO-GENERATED POWER SYSTEM  

E-Print Network [OSTI]

The gain of SVC depends upon the type of reactive power load for optimum performance. As the load and input wind power conditions are variable, the gain setting of SVC needs to be adjusted or tuned. In this paper, an ANN based approach has been used to tune the gain parameters of the SVC controller over a wide range of load characteristics. The multi-layer feed-forward ANN tool with the error backpropagation training method is employed. Loads have been taken as the function of voltage. Analytical techniques have mostly been based on impedance load reduced network models, which suffer from several disadvantages, including inadequate load representation and lack of structural integrity. The ability of ANNs to spontaneously learn from examples, reason over inexact and fuzzy data and provide adequate and quick responses to new information not previously stored in memory has generated high performance dynamical system with unprecedented robustness. ANNs models have been developed for different hybrid power system configurations for tuning the proportional-integral controller for SVC. Transient responses of different autonomous configurations show that SVC controller with its gained tuned by the ANNs provide optimum system performance for a variety of loads.

Vinod Kumar

248

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

SciTech Connect (OSTI)

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

Yi Jia

2011-02-28T23:59:59.000Z

249

High-power LEDs based on InGaAsP/InP heterostructures  

SciTech Connect (OSTI)

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

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

2014-12-15T23:59:59.000Z

250

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

SciTech Connect (OSTI)

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

Anders, Andre

2009-09-01T23:59:59.000Z

251

Design of Power Efficient FPGA based Hardware Accelerators for Financial Applications  

E-Print Network [OSTI]

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

Nannarelli, Alberto

252

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

E-Print Network [OSTI]

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

Singh, S N

2010-01-01T23:59:59.000Z

253

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

SciTech Connect (OSTI)

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

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

2010-01-01T23:59:59.000Z

254

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

SciTech Connect (OSTI)

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

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

1994-05-01T23:59:59.000Z

255

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

E-Print Network [OSTI]

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

Wang, Zhong L.

256

Data base of system-average dose rates at nuclear power plants: Final report  

SciTech Connect (OSTI)

In this work, a data base is derived of area dose rates for systems and components listed in the Energy Economic Data Base (EEDB). The data base is derived from area surveys obtained during outages at four boiling water reactors (BWRs) at three stations and eight pressurized water reactors (PWRs) at four stations. Separate tables are given for BWRs and PWRs. These tables may be combined with estimates of labor hours to provide order-of-magnitude estimates of exposure for purposes of regulatory analysis. They are only valid for work involving entire systems or components. The estimates of labor hours used in conjunction with the dose rates to estimate exposure must be adjusted to account for in-field time. Finally, the dose rates given in the data base do not reflect ALARA considerations. 11 refs., 2 figs., 3 tabs.

Beal, S.K.; Britz, W.L.; Cohen, S.C.; Goldin, A.S.; Goldin, D.J.

1987-10-01T23:59:59.000Z

257

Improvement of load-following capacity based on the flame radiation intensity signal in a power plant  

SciTech Connect (OSTI)

The capability to perform fast load changes has been an important issue due to the increasing commercialization of the power market. In the traditional boiler control system, the feedback signals come from the variations of the steam pressure and the steam flow, which leads to a large time delay. Therefore, a new method for the boiler control system based on radiation intensity for improving the load-following capacity of a coal-fired power plant has been developed in this paper. The system is implemented by adding the radiation intensity of the flame to the existing boiler control system as a complement. The radiation intensity obtained by the sensor can directly reflect the input heat in the boiler, with a faster response and higher sensitivity. Field tests on a 300 MW coal-fired power plant reveal that the improved boiler control system increases the load-following capacity. At the same time, the steam pressure variations are smaller as compared with those of the existing control system. 14 refs., 19 figs., 1 tab.

Fei Wang; Qunxing Huang; Dong Liu; Jianhua Yan; Kefa Cen [Zhejiang University, Hangzhou (China). State Key Laboratory of Clean Energy Utilization

2008-05-15T23:59:59.000Z

258

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

SciTech Connect (OSTI)

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

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

2004-07-01T23:59:59.000Z

259

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

E-Print Network [OSTI]

higher-efficiency land-based turbines for natural gas-fired power generation systems. The high inlet is significant for modeling cyclic deformation in directionally solidified and single crystal turbine blades

Li, Mo

260

TVA- Green Power Providers  

Broader source: Energy.gov [DOE]

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

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


261

Impact of Advanced Turbine Systems on coal-based power plants  

SciTech Connect (OSTI)

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

Bechtel, T.F.

1993-12-31T23:59:59.000Z

262

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

SciTech Connect (OSTI)

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

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

1993-03-01T23:59:59.000Z

263

Nanowire-Composite based Flexible Thermoelectric Nanogenerators and Self-Powered Temperature Sensors  

E-Print Network [OSTI]

) polymer composite as the thermoelectric material with a positive Seebeck coefficient of 285 V/K. A linearNano Res 1 Nanowire-Composite based Flexible Thermoelectric Nanogenerators and Self School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332

Wang, Zhong L.

264

Fractal-based cloud shadow and irradiance model for power system analysis with high penetration of photovoltaics.  

E-Print Network [OSTI]

??Distributed photovoltaic (PV) power generation systems are being rapidly deployed worldwide, causing technical problems such as reverse power flows, voltage rise and abnormal operation of… (more)

Cai, Chengrui

2014-01-01T23:59:59.000Z

265

Thermoeconomic design optimization of a KRW-based IGCC power plant  

SciTech Connect (OSTI)

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

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

1991-11-01T23:59:59.000Z

266

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

SciTech Connect (OSTI)

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

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

1991-11-01T23:59:59.000Z

267

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

SciTech Connect (OSTI)

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

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

2013-08-26T23:59:59.000Z

268

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

SciTech Connect (OSTI)

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

Katya L Le Blanc; Johanna H Oxstrand

2013-10-01T23:59:59.000Z

269

Auxiliary feedwater system risk-based inspection guide for the Byron and Braidwood nuclear power plants  

SciTech Connect (OSTI)

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

Moffitt, N.E.; Gore, B.F.: Vo, T.V. (Pacific Northwest Lab., Richland, WA (USA))

1991-07-01T23:59:59.000Z

270

Auxiliary feedwater system risk-based inspection guide for the H. B. Robinson nuclear power plant  

SciTech Connect (OSTI)

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

Moffitt, N.E.; Lloyd, R.C.; Gore, B.F.; Vo, T.V. [Pacific Northwest Lab., Richland, WA (United States); Garner, L.W. [Nuclear Regulatory Commission, Washington, DC (United States)

1993-08-01T23:59:59.000Z

271

Auxiliary feedwater system risk-based inspection guide for the McGuire nuclear power plant  

SciTech Connect (OSTI)

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

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

1994-05-01T23:59:59.000Z

272

Auxiliary feedwater system risk-based inspection guide for the J. M. Farley Nuclear Power Plant  

SciTech Connect (OSTI)

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

Vo, T.V.; Pugh, R.; Gore, B.F.; Harrison, D.G. (Pacific Northwest Lab., Richland, WA (USA))

1990-10-01T23:59:59.000Z

273

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

SciTech Connect (OSTI)

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

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

1991-09-01T23:59:59.000Z

274

Auxiliary feedwater system risk-based inspection guide for the South Texas Project nuclear power plant  

SciTech Connect (OSTI)

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

Bumgardner, J.D.; Nickolaus, J.R.; Moffitt, N.E.; Gore, B.F.; Vo, T.V. [Pacific Northwest Lab., Richland, WA (United States)

1993-12-01T23:59:59.000Z

275

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

SciTech Connect (OSTI)

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

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

2014-09-14T23:59:59.000Z

276

An Heuristic Drift-Based Model of the Power Scrape-Off Width in H-Mode Tokamaks  

SciTech Connect (OSTI)

An heuristic model for the plasma scrape-off width in H-mode plasmas is introduced. Grad B and curv B drifts into the SOL are balanced against sonic parallel flows out of the SOL, to the divertor plates. The overall mass flow pattern posited is a modification for open field lines of Pfirsch-Shlüter flows to include sinks to the divertors. These assumptions result in an estimated SOL width of 2a?p/R. They also result in a first-principles calculation of the particle confinement time of H-mode plasmas, qualitatively consistent with experimental observations. It is next assumed that anomalous perpendicular electron thermal diffusivity is the dominant source of heat flux across the separatrix, investing the SOL width, defined above, with heat from the main plasma. The separatrix temperature is calculated based on a two-point model balancing power input to the SOL with Spitzer-Härm parallel thermal conduction losses to the divertor. This results in an heuristic closed-form prediction for the power scrape-off width that is in remarkable quantitative agreement both in absolute magnitude and in scaling with recent experimental data. Further work should include full numerical calculations, including all magnetic and electric drifts, as well as more thorough comparison with experimental data.

Robert J. Goldston

2011-02-28T23:59:59.000Z

277

Concept of development of nuclear power based on LMFBR operation in open nuclear fuel cycle  

SciTech Connect (OSTI)

The preliminary assessments performed show that it is reasonable to investigate in the future the possibilities of FBR efficient operation with the open NFC. To improve its safety it is expedient to use the lead-bismuth alloy as a coolant. In order to operate with depleted uranium make-up it is necessary to meet a number of requirements providing the reactor criticality due to plutonium build-up and BR > 1. These requirements are as follows: a large core (20--25 m{sup 3}); a high fuel volume fraction (> 60%); utilization of dense metallic fuel; a high fuel burn-up--at a level of 20% of h.a. Making use of these reactors should allow the NP fuel base to be extended more than 10 times without making NFC closed. It provides improving NP safety during a sufficiently long stage of its development.

Toshinsky, G.I. [Inst. of Physics and Power Engineering, Obninsk (Russian Federation)

1996-08-01T23:59:59.000Z

278

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

DOE Patents [OSTI]

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

Chassin, David P

2014-01-28T23:59:59.000Z

279

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

SciTech Connect (OSTI)

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

Lee, J.C.

1993-01-01T23:59:59.000Z

280

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

DOE Patents [OSTI]

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

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

2011-10-11T23:59:59.000Z

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


281

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

SciTech Connect (OSTI)

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

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

2014-07-01T23:59:59.000Z

282

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

E-Print Network [OSTI]

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

Keaveny, Tony

283

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

SciTech Connect (OSTI)

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

Not Available

1980-12-01T23:59:59.000Z

284

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 53, NO. 2, APRIL 2006 477 Voltage-Source Active Power Filter Based on  

E-Print Network [OSTI]

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 53, NO. 2, APRIL 2006 477 Voltage-Source Active MODERN power electronics have contributed a great deal to the development of new powerful applications in line currents, which ends up distorting the voltage waveforms. Some power electronics applications

Catholic University of Chile (Universidad CatĂłlica de Chile)

285

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

SciTech Connect (OSTI)

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

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

2009-06-30T23:59:59.000Z

286

Micro-grid State Estimation Using Belief Propagation on Factor Graphs  

E-Print Network [OSTI]

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

Kavcic, Aleksandar

287

WindTurbineGenerator Introduction of the Renewable Micro-Grid Test-Bed  

E-Print Network [OSTI]

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

Johnson, Eric E.

288

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

SciTech Connect (OSTI)

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

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

1992-06-01T23:59:59.000Z

289

Monolithic solid oxide fuel cell technology advancement for coal-based power generation. Final report, September 1989--March 1994  

SciTech Connect (OSTI)

This project has successfully advanced the technology for MSOFCs for coal-based power generation. Major advances include: tape-calendering processing technology, leading to 3X improved performance at 1000 C; stack materials formulations and designs with sufficiently close thermal expansion match for no stack damage after repeated thermal cycling in air; electrically conducting bonding with excellent structural robustness; and sealants that form good mechanical seals for forming manifold structures. A stack testing facility was built for high-spower MSOFC stacks. Comprehensive models were developed for fuel cell performance and for analyzing structural stresses in multicell stacks and electrical resistance of various stack configurations. Mechanical and chemical compatibility properties of fuel cell components were measured; they show that the baseline Ca-, Co-doped interconnect expands and weakens in hydrogen fuel. This and the failure to develop adequate sealants were the reason for performance shortfalls in large stacks. Small (1-in. footprint) two-cell stacks were fabricated which achieved good performance (average area-specific-resistance 1.0 ohm-cm{sup 2} per cell); however, larger stacks had stress-induced structural defects causing poor performance.

Not Available

1994-05-01T23:59:59.000Z

290

Power Plant Power Plant  

E-Print Network [OSTI]

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

Tingley, Joseph V.

291

Reliable, Efficient and Cost-Effective Electric Power Converter for Small Wind Turbines Based on AC-link Technology  

SciTech Connect (OSTI)

Grid-tied inverter power electronics have been an Achilles heel of the small wind industry, providing opportunity for new technologies to provide lower costs, greater efficiency, and improved reliability. The small wind turbine market is also moving towards the 50-100kW size range. The unique AC-link power conversion technology provides efficiency, reliability, and power quality advantages over existing technologies, and Princeton Power will adapt prototype designs used for industrial asynchronous motor control to a 50kW small wind turbine design.

Darren Hammell; Mark Holveck; DOE Project Officer - Keith Bennett

2006-08-01T23:59:59.000Z

292

An Occupant-Based Dynamic Simulation Tool for Predicting Residential Power Demand and Quantifying the Impact of Residential Demand Response.  

E-Print Network [OSTI]

?? With their large impact on the power system and widespread distribution, residential loads provide vast resources that if utilized correctly have the potential to… (more)

Johnson, Brandon Jeffrey

2013-01-01T23:59:59.000Z

293

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

E-Print Network [OSTI]

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

Chen, Zhe

294

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

SciTech Connect (OSTI)

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

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

2009-01-01T23:59:59.000Z

295

Power Factor Reactive Power  

E-Print Network [OSTI]

power: 130 watts Induction motor PSERC Incandescent lights 0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0 power: 150 watts #12;Page 4 PSERC Incandescent Lights PSERC Induction motor with no load #12;Page 5 Incandescent Lights #12;Page 7 PSERC Incandescent lights power: Power = 118 V x 1.3 A = 153 W = 0.15 kW = power

296

High Level Power Estimation based on a functional analysis for Embedded DSP Johann LAURENT Nathalie JULIEN Eric SENN Eric MARTIN  

E-Print Network [OSTI]

of the cooling system and batteries. The power optimization can act on these different parameters-known that algorithm transformations are more efficient than technologic optimizations [1]; furthermore caches and possibly superscalar architecture. All recent works on power estimation for DSP operate

Paris-Sud XI, Université de

297

California constitutes a significant automotive market -a place here  

E-Print Network [OSTI]

including Tesla and Fisker. As these innovations come on line their integration into the smart grid to smooth micro-grid consumption · Integration with micro- grid based community storage of creating mass using the smart grid wireless system under development at UCLA called WINSmartGrid TM . In this project

California at Los Angeles, University of

298

Thermodynamic Modeling and Analysis of the Ratio of Heat to Power Based on a Conceptual CHP System  

E-Print Network [OSTI]

The CHP system not only produces electrical energy, but also produces thermal energy. An extensive analysis of the CHP market reveals that one of the most important engineering characteristics is flexibility. A variable heat-to-power ratio has...

Liu, Z.; Li, X.; Liu, Z.

2006-01-01T23:59:59.000Z

299

Using risk-based regulations for licensing nuclear power plants : case study of gas-cooled fast reactor  

E-Print Network [OSTI]

The strategy adopted for national energy supply is one of the most important policy choice for the US. Although it has been dismissed in the past decades, nuclear power today has key assets when facing concerns on energy ...

Jourdan, Grégoire

2005-01-01T23:59:59.000Z

300

Application of bounding spectra to seismic design of piping based on the performance of above ground piping in power plants subjected to strong motion earthquakes  

SciTech Connect (OSTI)

This report extends the potential application of Bounding Spectra evaluation procedures, developed as part of the A-46 Unresolved Safety Issue applicable to seismic verification of in-situ electrical and mechanical equipment, to in-situ safety related piping in nuclear power plants. The report presents a summary of earthquake experience data which define the behavior of typical U.S. power plant piping subject to strong motion earthquakes. The report defines those piping system caveats which would assure the seismic adequacy of the piping systems which meet those caveats and whose seismic demand are within the bounding spectra input. Based on the observed behavior of piping in strong motion earthquakes, the report describes the capabilities of the piping system to carry seismic loads as a function of the type of connection (i.e. threaded versus welded). This report also discusses in some detail the basic causes and mechanisms for earthquake damages and failures to power plant piping systems.

Stevenson, J.D. [Stevenson and Associates, Cleveland, OH (United States)

1995-02-01T23:59:59.000Z

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


301

An ambipolar phosphine oxide-based host for high power efficiency blue phosphorescent organic light emitting devices  

SciTech Connect (OSTI)

We report blue electrophosphorescent organic light emitting devices (OLEDs) with a new ambipolar host material, 4-(diphenylphosphoryl)-N,N-diphenylaniline (HM-A1), doped with the blue phosphor iridium (III) bis[(4,6-difluorophenyl)-pyridinato-N,C2’]picolinate (FIrpic). The ambipolar nature of the host was verified using single carrier devices. The power efficiency of devices that employed 2,8-bis(diphenylphosphoryl)dibenzothiophene (PO15) as the electron transport layer showed optimized device performance when the electron transport layer thickness was 500 Ĺ, giving a peak power efficiency of 46 lm/W (corresponding external quantum efficiency of 17.1%). The external quantum efficiency and power efficiency at the brightness of 800 Cd/m2 were measured with no light outcoupling enhancement and found to be 15.4% and 26 lm/W, respectively.

Polikarpov, Evgueni; Swensen, James S.; Chopra, Neetu; So, Franky; Padmaperuma, Asanga B.

2009-06-01T23:59:59.000Z

302

IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 25, NO. 4, NOVEMBER 2010 1823 Season-Dependent Condition-Based Maintenance  

E-Print Network [OSTI]

to the total energy production cost is 10%­20% for a wind farm. Vachon [4] shows that the O&M costs can account energy. I. INTRODUCTION P ROPELLED by the pressures of mitigating the effects of climate change and high energy costs, wind power becomes one of the fastest growing renewable energy sources around the world

Ding, Yu

303

Abstract--This paper proposes an effective VAR planning based on reactive power margin for the enhancement of dynamic  

E-Print Network [OSTI]

, distributed generation (DG), D-STATCOM, reactive power margin, wind turbine. I. INTRODUCTION URRENTLY for the enhancement of dynamic voltage stability in distribution networks with distributed wind generation results showing the effects of composite load on voltage dynamics in the distribution network through

Pota, Himanshu Roy

304

Work In Progress: Conquest--Combining Battery-Backed RAM and Threshold-Based Storage Scheme to Conserve Power  

E-Print Network [OSTI]

accesses, which account for 8% of the power usage for laptops, 20% for web servers, and up to 70% for disk, Computer Science Department, UCLA, popek@cs.ucla.edu Energy conservation has become a pressing re- search performance and more features. Due to rising energy costs, the server market is also becoming sensitive

Wang, Andy

305

Increase in NOx Emissions from Indian Thermal Power Plants during 1996-2010: Unit-Based Inventories and Multisatellite Observations  

E-Print Network [OSTI]

and Multisatellite Observations Zifeng Lu* and David G. Streets Decision and Information Sciences Division, Argonne National Laboratory, Argonne, Illinois, United States *S Supporting Information ABSTRACT: Driven by rapid economic development and growing electricity demand, NOx emissions (E) from the power sector in India have

Jacob, Daniel J.

306

Abstract--We consider the management of electric vehicle (EV) loads within a market-based Electric Power System  

E-Print Network [OSTI]

battery charging while engaging in energy and reserve capacity transactions in the wholesale power market. Given the important role of the wholesale market in the ESCo costs and revenues, we describe next observing feeder congestion constraints. B. Day-Ahead and Real-Time Wholesale Markets We assume an operative

Caramanis, Michael

307

US Department of Energy`s high-temperature and high-pressure particulate cleanup for advanced coal-based power systems  

SciTech Connect (OSTI)

The availability of reliable, low-cost electricity is a cornerstone for the United States` ability to compete in the world market. The Department of Energy (DOE) projects the total consumption of electricity in the US to rise from 2.7 trillion kilowatt-hours in 1990 to 3.5 trillion in 2010. Although energy sources are diversifying, fossil fuel still produces 90 percent of the nation`s energy. Coal is our most abundant fossil fuel resource and the source of 56 percent of our electricity. It has been the fuel of choice because of its availability and low cost. A new generation of high-efficiency power systems has made it possible to continue the use of coal while still protecting the environment. Such power systems greatly reduce the pollutants associated with cola-fired plants built before the 1970s. To realize this high efficiency and superior environmental performance, advanced coal-based power systems will require gas stream cleanup under high-temperature and high-pressure (HTHP) process conditions. Presented in this paper are the HTHP particulate capture requirements for the Integrated Gasification Combined Cycle (IGCC) and Pressurized Fluidized-Bed Combustion (PFBC) power systems, the HTHP particulate cleanup systems being implemented in the PFBC and IGCC Clean Coal Technology (CCT) Projects, and the currently available particulate capture performance results.

Dennis, R.A.

1997-05-01T23:59:59.000Z

308

Application of EPRI risk-based inservice inspection procedure to combustion engineering design of nuclear power plant  

SciTech Connect (OSTI)

The EPRI developed risk-based inservice inspection procedure is used to select the elements for inservice inspection on a section of the high pressure safety injection system of the Entergy Operations ANO2 nuclear plant. This plant is the pilot plant in a six utility-eleven plant EPRI tailored collaboration program to apply the general EPRI procedures to Combustion Engineering NSSS designs. The procedure results in a reduction of candidate inspection locations from 14, based on current ASME Section XI rules for B-J welds to 3, based on the risk-based selection criteria.

Lubin, B.T. [ABB Combustion Engineering, Windsor, CT (United States). Nuclear Operations; Fourgerousse, R. [Entergy Operations-ANO2, Russellville, AR (United States)

1996-12-01T23:59:59.000Z

309

Demonstration of a Novel Synchrophasor-based Situational Awareness System: Wide Area Power System Visualization, On-line Event Replay and Early Warning of Grid Problems  

SciTech Connect (OSTI)

Since the large North Eastern power system blackout on August 14, 2003, U.S. electric utilities have spent lot of effort on preventing power system cascading outages. Two of the main causes of the August 14, 2003 blackout were inadequate situational awareness and inadequate operator training In addition to the enhancements of the infrastructure of the interconnected power systems, more research and development of advanced power system applications are required for improving the wide-area security monitoring, operation and planning in order to prevent large- scale cascading outages of interconnected power systems. It is critically important for improving the wide-area situation awareness of the operators or operational engineers and regional reliability coordinators of large interconnected systems. With the installation of large number of phasor measurement units (PMU) and the related communication infrastructure, it will be possible to improve the operators’ situation awareness and to quickly identify the sequence of events during a large system disturbance for the post-event analysis using the real-time or historical synchrophasor data. The purpose of this project was to develop and demonstrate a novel synchrophasor-based comprehensive situational awareness system for control centers of power transmission systems. The developed system named WASA (Wide Area Situation Awareness) is intended to improve situational awareness at control centers of the power system operators and regional reliability coordinators. It consists of following main software modules: • Wide-area visualizations of real-time frequency, voltage, and phase angle measurements and their contour displays for security monitoring. • Online detection and location of a major event (location, time, size, and type, such as generator or line outage). • Near-real-time event replay (in seconds) after a major event occurs. • Early warning of potential wide-area stability problems. The system has been deployed and demonstrated at the Tennessee Valley Authority (TVA) and ISO New England system using real-time synchrophasor data from openPDC. Apart from the software product, the outcome of this project consists of a set of technical reports and papers describing the mathematical foundations and computational approaches of different tools and modules, implementation issues and considerations, lessons learned, and the results of lidation processes.

Rosso, A.

2012-12-31T23:59:59.000Z

310

Dose commitments due to radioactive releases from nuclear power plant sites: Methodology and data base. Supplement 1  

SciTech Connect (OSTI)

This manual describes a dose assessment system used to estimate the population or collective dose commitments received via both airborne and waterborne pathways by persons living within a 2- to 80-kilometer region of a commercial operating power reactor for a specific year of effluent releases. Computer programs, data files, and utility routines are included which can be used in conjunction with an IBM or compatible personal computer to produce the required dose commitments and their statistical distributions. In addition, maximum individual airborne and waterborne dose commitments are estimated and compared to 10 CFR Part 50, Appendix 1, design objectives. This supplement is the last report in the NUREG/CR-2850 series.

Baker, D.A. [Pacific Northwest National Lab., Richland, WA (United States)] [Pacific Northwest National Lab., Richland, WA (United States)

1996-06-01T23:59:59.000Z

311

Fuel Cell Power Model Version 2: Startup Guide, System Designs, and Case Studies. Modeling Electricity, Heat, and Hydrogen Generation from Fuel Cell-Based Distributed Energy Systems  

SciTech Connect (OSTI)

This guide helps users get started with the U.S. Department of Energy/National Renewable Energy Laboratory Fuel Cell Power (FCPower) Model Version 2, which is a Microsoft Excel workbook that analyzes the technical and economic aspects of high-temperature fuel cell-based distributed energy systems with the aim of providing consistent, transparent, comparable results. This type of energy system would provide onsite-generated heat and electricity to large end users such as hospitals and office complexes. The hydrogen produced could be used for fueling vehicles or stored for later conversion to electricity.

Steward, D.; Penev, M.; Saur, G.; Becker, W.; Zuboy, J.

2013-06-01T23:59:59.000Z

312

Improved Performance of an Air Cooled Condenser (ACC) Using SPX Wind Guide Technology at Coal-Based Thermoelectric Power Plants  

SciTech Connect (OSTI)

This project added a new airflow enhancement technology to an existing ACC cooling process at a selected coal power plant. Airflow parameters and efficiency improvement for the main plant cooling process using the applied technology were determined and compared with the capabilities of existing systems. The project required significant planning and pre-test execution in order to reach the required Air Cooled Condenser system configuration for evaluation. A host Power Plant ACC system had to be identified, agreement finalized, and addition of the SPX ACC Wind Guide Technology completed on that site. Design of the modification, along with procurement, fabrication, instrumentation, and installation of the new airflow enhancement technology were executed. Baseline and post-modification cooling system data was collected and evaluated. The improvement of ACC thermal performance after SPX wind guide installation was clear. Testing of the improvement indicates there is a 5% improvement in heat transfer coefficient in high wind conditions and 1% improvement at low wind speed. The benefit increased with increasing wind speed. This project was completed on schedule and within budget.

Ken Mortensen

2010-12-31T23:59:59.000Z

313

Proceedings of the 2007 IEEE 10th International Conference on Rehabilitation Robotics, June 12-15, Noordwijk, The Netherlands Decomposition-Based Control for a Powered Knee and Ankle  

E-Print Network [OSTI]

-15, Noordwijk, The Netherlands Decomposition-Based Control for a Powered Knee and Ankle Transfemoral Prosthesis to energetically passive devices. The knee and ankle joints of the native limb, however, generate significant net, the authors have developed a prototype of a powered knee and ankle transfemoral prosthesis, as described

314

IEEE TRANSACTIONS ON POWER DELIVERY, VOL. 28, NO. 4, OCTOBER 2013 2373 Market-Based Control in Emerging  

E-Print Network [OSTI]

prosumers, market- based control needs to make prosumer benets aligned with reg- ulator/DSOs concerns, thus prosumer behaviors. Not necessarily, the prosumer would be an "ideal citizen" [9] who follows a cooperative prosumers

Nesterov, Yurii

315

Internet Based, GIS Catalog of Non-Traditional Sources of Cooling Water for Use at America's Coal-Fired Power Plants  

SciTech Connect (OSTI)

In recent years, rising populations and regional droughts have caused coal-fired power plants to temporarily curtail or cease production due to a lack of available water for cooling. In addition, concerns about the availability of adequate supplies of cooling water have resulted in cancellation of plans to build much-needed new power plants. These issues, coupled with concern over the possible impacts of global climate change, have caused industry and community planners to seek alternate sources of water to supplement or replace existing supplies. The Department of Energy, through the National Energy Technology Laboratory (NETL) is researching ways to reduce the water demands of coal-fired power plants. As part of the NETL Program, ALL Consulting developed an internet-based Catalog of potential alternative sources of cooling water. The Catalog identifies alternative sources of water, such as mine discharge water, oil and gas produced water, saline aquifers, and publicly owned treatment works (POTWs), which could be used to supplement or replace existing surface water sources. This report provides an overview of the Catalog, and examines the benefits and challenges of using these alternative water sources for cooling water.

J. Daniel Arthur

2011-09-30T23:59:59.000Z

316

Codes and Standards to Support Vehicle Electrification  

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

use case, protocols, etc.) - Expand on SAE J2XXX3 (bi-directional power flow, including micro-grid implementation of DC and AC charged vehicles, with utility messages) ...

317

Open-cycle magnetohydrodynamic power plant based upon direct-contact closed-loop high-temperature heat exchanger  

DOE Patents [OSTI]

A magnetohydrodynamic (MHD) power generating system in which ionized combustion gases with slag and seed are discharged from an MHD combustor and pressurized high temperature inlet air is introduced into the combustor for supporting fuel combustion at high temperatures necessary to ionize the combustion gases, and including a heat exchanger in the form of a continuous loop with a circulating heat transfer liquid such as copper oxide. The heat exchanger has an upper horizontal channel for providing direct contact between the heat transfer liquid and the combustion gases to cool the gases and condense the slag which thereupon floats on the heat transfer liquid and can be removed from the channel, and a lower horizontal channel for providing direct contact between the heat transfer liquid and pressurized air for preheating the inlet air. The system further includes a seed separator downstream of the heat exchanger.

Berry, Gregory F. (Naperville, IL); Minkov, Vladimir (Skokie, IL); Petrick, Michael (Joliet, IL)

1988-01-01T23:59:59.000Z

318

Open-cycle magnetohydrodynamic power plant based upon direct-contact closed-loop high-temperature heat exchanger  

DOE Patents [OSTI]

A magnetohydrodynamic (MHD) power generating system is described in which ionized combustion gases with slag and seed are discharged from an MHD combustor and pressurized high temperature inlet air is introduced into the combustor for supporting fuel combustion at high temperatures necessary to ionize the combustion gases, and including a heat exchanger in the form of a continuous loop with a circulating heat transfer liquid such as copper oxide. The heat exchanger has an upper horizontal channel for providing direct contact between the heat transfer liquid and the combustion gases to cool the gases and condense the slag which thereupon floats on the heat transfer liquid and can be removed from the channel, and a lower horizontal channel for providing direct contact between the heat transfer liquid and pressurized air for preheating the inlet air. The system further includes a seed separator downstream of the heat exchanger.

Berry, G.F.; Minkov, V.; Petrick, M.

1981-11-02T23:59:59.000Z

319

ZnO nanotube-based dye-sensitized solar cell and its application in self-powered devices This article has been downloaded from IOPscience. Please scroll down to see the full text article.  

E-Print Network [OSTI]

ZnO nanotube-based dye-sensitized solar cell and its application in self-powered devices.1088/0957-4484/21/40/405203 ZnO nanotube-based dye-sensitized solar cell and its application in self-powered devices Jingbin Han1-length nanotubes as the photoanode for a dye-sensitized solar cell (DSSC), a full-sun conversion efficiency of 1

Wang, Zhong L.

320

RESULTS OF THE TECHNICAL AND ECONOMIC FEASIBILITY ANALYSIS FOR A NOVEL BIOMASS GASIFICATION-BASED POWER GENERATION SYSTEM FOR THE FOREST PRODUCTS INDUSTRY  

SciTech Connect (OSTI)

In 2001, the Gas Technology Institute (GTI) entered into Cooperative Agreement DE-FC26-01NT41108 with the U.S. Department of Energy (DOE) for an Agenda 2020 project to develop an advanced biomass gasification-based power generation system for near-term deployment in the Forest Products Industry (FPI). The advanced power system combines three advanced components, including biomass gasification, 3-stage stoker-fired combustion for biomass conversion, and externally recuperated gas turbines (ERGTs) for power generation. The primary performance goals for the advanced power system are to provide increased self-generated power production for the mill and to increase wastewood utilization while decreasing fossil fuel use. Additional goals are to reduce boiler NOx and CO{sub 2} emissions. The current study was conducted to determine the technical and economic feasibility of an Advanced Power Generation System capable of meeting these goals so that a capital investment decision can be made regarding its implementation at a paper mill demonstration site in DeRidder, LA. Preliminary designs and cost estimates were developed for all major equipment, boiler modifications and balance of plant requirements including all utilities required for the project. A three-step implementation plan was developed to reduce technology risk. The plant design was found to meet the primary objectives of the project for increased bark utilization, decreased fossil fuel use, and increased self-generated power in the mill. Bark utilization for the modified plant is significantly higher (90-130%) than current operation compared to the 50% design goal. For equivalent steam production, the total gas usage for the fully implemented plant is 29% lower than current operation. While the current average steam production from No.2 Boiler is about 213,000 lb/h, the total steam production from the modified plant is 379,000 lb/h. This steam production increase will be accomplished at a grate heat release rate (GHRR) equal to the original boiler design. Boiler efficiencies (cogeneration-steam plus air) is increased from the original design value of 70% to 78.9% due to a combination of improved burnout, operation with lower excess air, and drier fuel. For the fully implemented plant, the thermal efficiency of fuel to electricity conversion is 79.8% in the cogeneration mode, 5% above the design goal. Finally, self-generated electricity will be increased from the 10.8 MW currently attributable to No.2 Boiler to 46.7MW, an increase of 332%. Environmental benefits derived from the system include a reduction in NOx emissions from the boiler of about 30-50% (90-130 tons/year) through syngas reburning, improved carbon burnout and lower excess air. This does not count NOx reduction that may be associated with replacement of purchased electricity. The project would reduce CO{sub 2} emissions from the generation of electricity to meet the mill's power requirements, including 50,000 tons/yr from a net reduction in gas usage in the mill and an additional 410,000 tons/yr reduction in CO{sub 2} emissions due to a 34 MW reduction of purchased electricity. The total CO{sub 2} reduction amounts to about 33% of the CO{sub 2} currently generated to meet the mills electricity requirement. The overall conclusion of the study is that while significant engineering challenges are presented by the proposed system, they can be met with operationally acceptable and cost effective solutions. The benefits of the system can be realized in an economic manner, with a simple payback period on the order of 6 years. The results of the study are applicable to many paper mills in the U.S. firing woodwastes and other solid fuels for steam and power production.

Bruce Bryan; Joseph Rabovitser; Sunil Ghose; Jim Patel

2003-11-01T23:59:59.000Z

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


321

System level design of power distribution network for mobile computing platforms  

E-Print Network [OSTI]

Regulator based Power Distribution Design under WorstRegulator based Power Distribution Design under WorstRegulator based Power Distribution Design under Worst

Shayan Arani, Amirali

2011-01-01T23:59:59.000Z

322

4968 IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 28, NO. 4, NOVEMBER 2013 Optimized FTR Portfolio Construction Based on the  

E-Print Network [OSTI]

handling and heavy computing demands of locational marginal price (LMP)-difference-based methods for FTR, each seller (buyer) re- ceives (pays) the locational marginal price (LMP) at the point of Manuscript whomever they desire [1]. The result is higher electricity prices at various locations in the grid. Our

Gross, George

323

Does Electricity (and Heat) Network Regulation have anything to learn from Fixed Line Telecoms?  

E-Print Network [OSTI]

 customers. It is in this context that fixed line  telecoms deregulation becomes of interest. Indeed energy network deregulation and telecoms  deregulation may indeed be technologically related by the fact that micro?grid or ‘island’ power and  heat systems might rely...  usually (but not always) different from the sort of  energy service driven investments that this paper envisages, where independent networks may arise  as part of the optimal asset configuration of a new entrant supply company (e.g. a local energy  service company based on a local combined heat and power...

Pollitt, Michael G.

324

Power module assembly  

DOE Patents [OSTI]

A power module assembly of the type suitable for deployment in a vehicular power inverter, wherein the power inverter has a grounded chassis, is provided. The power module assembly comprises a conductive base layer electrically coupled to the chassis, an insulating layer disposed on the conductive base layer, a first conductive node disposed on the insulating layer, a second conductive node disposed on the insulating layer, wherein the first and second conductive nodes are electrically isolated from each other. The power module assembly also comprises a first capacitor having a first electrode electrically connected to the conductive base layer, and a second electrode electrically connected to the first conductive node, and further comprises a second capacitor having a first electrode electrically connected to the conductive base layer, and a second electrode electrically connected to the second conductive node.

Campbell, Jeremy B. (Torrance, CA); Newson, Steve (Redondo Beach, CA)

2011-11-15T23:59:59.000Z

325

Power mixture and green body for producing silicon nitride base & articles of high fracture toughness and strength  

DOE Patents [OSTI]

A powder mixture and a green body for producing a silicon nitride-based article of improved fracture toughness and strength. The powder mixture includes 9a) a bimodal silicon nitride powder blend consisting essentially of about 10-30% by weight of a first silicon mitride powder of an average particle size of about 0.2 .mu.m and a surface area of about 8-12m.sup.2 g, and about 70-90% by weight of a second silicon nitride powder of an average particle size of about 0.4-0.6 .mu.m and a surface area of about 2-4 m.sup.2 /g, (b) about 10-50 percent by volume, based on the volume of the densified article, of refractory whiskers or fibers having an aspect ratio of about 3-150 and having an equivalent diameter selected to produce in the densified articel an equivalent diameter ratio of the whiskers or fibers to grains of silicon nitride of greater than 1.0, and (c) an effective amount of a suitable oxide densification aid. The green body is formed from the powder mixture, an effective amount of a suitable oxide densification aid, and an effective amount of a suitable organic binder.

Huckabee, Marvin L. (Marlboro, MA); Buljan, Sergej-Tomislav (Acton, MA); Neil, Jeffrey T. (Acton, MA)

1991-01-01T23:59:59.000Z

326

Power mixture and green body for producing silicon nitride base articles of high fracture toughness and strength  

DOE Patents [OSTI]

A powder mixture and a green body for producing a silicon nitride-based article of improved fracture toughness and strength are disclosed. The powder mixture includes (a) a bimodal silicon nitride powder blend consisting essentially of about 10-30% by weight of a first silicon nitride powder of an average particle size of about 0.2 [mu]m and a surface area of about 8-12m[sup 2]g, and about 70-90% by weight of a second silicon nitride powder of an average particle size of about 0.4-0.6 [mu]m and a surface area of about 2-4 m[sup 2]/g, (b) about 10-50 percent by volume, based on the volume of the densified article, of refractory whiskers or fibers having an aspect ratio of about 3-150 and having an equivalent diameter selected to produce in the densified article an equivalent diameter ratio of the whiskers or fibers to grains of silicon nitride of greater than 1.0, and (c) an effective amount of a suitable oxide densification aid. The green body is formed from the powder mixture, an effective amount of a suitable oxide densification aid, and an effective amount of a suitable organic binder. No Drawings

Huckabee, M.L.; Buljan, S.T.; Neil, J.T.

1991-09-17T23:59:59.000Z

327

PESC'99, Charleston, South Carolina, June 27 July 1, pp. 393-399. A Multilevel Converter-Based Universal Power Conditioner  

E-Print Network [OSTI]

, and reactive power compensation. Level usage in the series inverter and parallel inverter is analyzed that the customer can impose on the utility. To meet the objectives detailed in these new premium power agreements- clamped inverter into a universal power conditioner is an enticing prospect. A multilevel universal power

Tolbert, Leon M.

328

Integrated All-silicon Thin-film Power Electronics on Flexible Sheets For Ubiquitous Wireless Charging Stations based on Solar-energy Harvesting  

E-Print Network [OSTI]

the power inverter circuit. To generate an AC output current, the two solar modules (S1/2) are used to provide embedded power inversion, harvester control, and power amplification. This converts DC outputs from the solar modules to AC power for wireless device charging through patterned capacitive antennas

329

Nuclear power browning out  

SciTech Connect (OSTI)

When the sad history of nuclear power is written, April 26, 1986, will be recorded as the day the dream died. The explosion at the Chernobyl plant was a terrible human tragedy- and it delivered a stark verdict on the hope that nuclear power will one day replace fossil fuel-based energy systems. Nuclear advocates may soldier on, but a decade after Chernobyl it is clear that nuclear power is no longer a viable energy option for the twenty-first century.

Flavin, C.; Lenssen, N.

1996-05-01T23:59:59.000Z

330

Modeling Long-term Creep Performance for Welded Nickel-base Superalloy Structures for Power Generation Systems  

SciTech Connect (OSTI)

We report here a constitutive model for predicting long-term creep strain evolution in ?’ strengthened Ni-base superalloys. Dislocation climb-bypassing ?’, typical in intermediate ?’ volume fraction (~20%) alloys, is considered as the primary deformation mechanism. Dislocation shearing ?’ to anti-phase boundary (APB) faults and diffusional creep are also considered for high-stress and high-temperature low-stress conditions, respectively. Additional damage mechanism is taken into account for rapid increase in tertiary creep strain. The model has been applied to Alloy 282, and calibrated in a temperature range of 1375-1450?F, and stress range of 15-45ksi. The model parameters and a MATLAB code are provided. This report is prepared by Monica Soare and Chen Shen at GE Global Research. Technical discussions with Dr. Vito Cedro are greatly appreciated. This work was supported by DOE program DE-FE0005859

Shen, Chen

2015-01-01T23:59:59.000Z

331

Fuel Cycle Comparison for Distributed Power Technologies  

Fuel Cell Technologies Publication and Product Library (EERE)

This report examines backup power and prime power systems and addresses the potential energy and environmental effects of substituting fuel cells for existing combustion technologies based on microtur

332

Tunable sub-20 fs pulses from a 500 kHz OPCPA with 15 W average power based on an all-ytterbium laser  

E-Print Network [OSTI]

An optical parametric chirped pulse amplifier fully based on Yb lasers at 500 kHz is described. Passive optical-synchronization is achieved between a fiber laser-pumped white-light and a 515 nm pump produced with a 200 W picosecond Yb:YAG InnoSlab amplifier. An output power up to 19.7 W with long-term stability of 0.3% is demonstrated for wavelength tunable pulses between 680 nm and 900 nm and spectral stability of 0.2%; 16.5 W can be achieved with a bandwidth supporting 5.4 fs pulses. We demonstrate compression of 30 microjoule pulses to sub-20 fs duration with a prism compressor, suitable for high harmonic generation.

Puppin, Michele; Prochnow, Oliver; Ahrens, Jan; Binhammer, Thomas; Morgner, Uwe; Krenz, Marcel; Wolf, Martin; Ernstorfer, Ralph

2014-01-01T23:59:59.000Z

333

Requirements for Computer Based-Procedures for Nuclear Power Plant Field Operators Results from a Qualitative Study  

SciTech Connect (OSTI)

Although computer-based procedures (CBPs) have been investigated as a way to enhance operator performance on procedural tasks in the nuclear industry for almost thirty years, they are not currently widely deployed at United States utilities. One of the barriers to the wide scale deployment of CBPs is the lack of operational experience with CBPs that could serve as a sound basis for justifying the use of CBPs for nuclear utilities. Utilities are hesitant to adopt CBPs because of concern over potential costs of implementation, and concern over regulatory approval. Regulators require a sound technical basis for the use of any procedure at the utilities; without operating experience to support the use CBPs, it is difficult to establish such a technical basis. In an effort to begin the process of developing a technical basis for CBPs, researchers at Idaho National Laboratory are partnering with industry to explore CBPs with the objective of defining requirements for CBPs and developing an industry-wide vision and path forward for the use of CBPs. This paper describes the results from a qualitative study aimed at defining requirements for CBPs to be used by field operators and maintenance technicians.

Katya Le Blanc; Johanna Oxstrand

2012-05-01T23:59:59.000Z

334

Qualification for PowerInsight accuracy of power measurements.  

SciTech Connect (OSTI)

Accuracy of component based power measuring devices forms a necessary basis for research in the area of power-e cient and power-aware computing. The accuracy of these devices must be quanti ed within a reasonable tolerance. This study focuses on PowerInsight, an out- of-band embedded measuring device which takes readings of power rails on compute nodes within a HPC system in realtime. We quantify how well the device performs in comparison to a digital oscilloscope as well as PowerMon2. We show that the accuracy is within a 6% deviation on measurements under reasonable load.

DeBonis, David; Laros, James H.,; Pedretti, Kevin Thomas Tauke

2013-11-01T23:59:59.000Z

335

Critical pulse power components  

SciTech Connect (OSTI)

Critical components for pulsed power conditioning systems will be reviewed. Particular emphasis will be placed on those components requiring significant development efforts. Capacitors, for example, are one of the weakest elements in high-power pulsed systems, especially when operation at high-repetition frequencies for extended periods of time are necessary. Switches are by far the weakest active components of pulse power systems. In particular, opening switches are essentially nonexistent for most applications. Insulaton in all systems and components requires development and improvement. Efforts under way in technology base development of pulse power components will be discussed.

Sarjeant, W.J.; Rohwein, G.J.

1981-01-01T23:59:59.000Z

336

Thermionic power generation. January 1972-December 1980 (citations from the International Aerospace Abstracts Data Base). Report for January 1972-December 1980  

SciTech Connect (OSTI)

Research on thermionic power generation, power plant design, converter design, and basic research on thermionic materials are cited in the bibliography. Spacecraft applications are also included. (Contains 142 citations, fully indexed and including a table of contents.)

Not Available

1980-12-01T23:59:59.000Z

337

A Synergistic Combination of Advanced Separation and Chemical Scale Inhibitor Technologies for Efficient Use of Imparied Water As Cooling Water in Coal-based Power Plants  

SciTech Connect (OSTI)

Nalco Company is partnering with Argonne National Laboratory (ANL) in this project to jointly develop advanced scale control technologies that will provide cost-effective solutions for coal-based power plants to operate recirculating cooling water systems at high cycles using impaired waters. The overall approach is to use combinations of novel membrane separations and scale inhibitor technologies that will work synergistically, with membrane separations reducing the scaling potential of the cooling water and scale inhibitors extending the safe operating range of the cooling water system. The project started on March 31, 2006 and ended in August 30, 2010. The project was a multiyear, multi-phase project with laboratory research and development as well as a small pilot-scale field demonstration. In Phase 1 (Technical Targets and Proof of Concept), the objectives were to establish quantitative technical targets and develop calcite and silica scale inhibitor chemistries for high stress conditions. Additional Phase I work included bench-scale testing to determine the feasibility of two membrane separation technologies (electrodialysis ED and electrode-ionization EDI) for scale minimization. In Phase 2 (Technology Development and Integration), the objectives were to develop additional novel scale inhibitor chemistries, develop selected separation processes, and optimize the integration of the technology components at the laboratory scale. Phase 3 (Technology Validation) validated the integrated system's performance with a pilot-scale demonstration. During Phase 1, Initial evaluations of impaired water characteristics focused on produced waters and reclaimed municipal wastewater effluents. Literature and new data were collected and evaluated. Characteristics of produced waters vary significantly from one site to another, whereas reclaimed municipal wastewater effluents have relatively more uniform characteristics. Assessment to date confirmed that calcite and silica/silicate are two common potential cycle-limiting minerals for using impaired waters. For produced waters, barium sulfate and calcium sulfate are two additional potential cycle-limiting minerals. For reclaimed municipal wastewater effluents, calcium phosphate scaling can be an issue, especially in the co-presence of high silica. Computational assessment, using a vast amount of Nalco's field data from coal fired power plants, showed that the limited use and reuse of impaired waters is due to the formation of deposit caused by the presence of iron, high hardness, high silica and high alkalinity in the water. Appropriate and cost-effective inhibitors were identified and developed - LL99B0 for calcite and gypsum inhibition and TX-15060 for silica inhibition. Nalco's existing dispersants HSP-1 and HSP-2 has excellent efficacy for dispersing Fe and Mn. ED and EDI were bench-scale tested by the CRADA partner Argonne National Laboratory for hardness, alkalinity and silica removal from synthetic make-up water and then cycled cooling water. Both systems showed low power consumption and 98-99% salt removal, however, the EDI system required 25-30% less power for silica removal. For Phase 2, the EDI system's performance was optimized and the length of time between clean-in-place (CIP) increased by varying the wafer composition and membrane configuration. The enhanced EDI system could remove 88% of the hardness and 99% of the alkalinity with a processing flux of 19.2 gal/hr/m{sup 2} and a power consumption of 0.54 kWh/100 gal water. Bench tests to screen alternative silica/silicate scale inhibitor chemistries have begun. The silica/silicate control approaches using chemical inhibitors include inhibition of silicic acid polymerization and dispersion of silica/silicate crystals. Tests were conducted with an initial silica concentration of 290-300 mg/L as SiO{sub 2} at pH 7 and room temperature. A proprietary new chemistry was found to be promising, compared with a current commercial product commonly used for silica/silicate control. Additional pilot cooling tower testing confirmed

Jasbir Gill

2010-08-30T23:59:59.000Z

338

Computational power of correlations  

E-Print Network [OSTI]

We study the intrinsic computational power of correlations exploited in measurement-based quantum computation. By defining a general framework the meaning of the computational power of correlations is made precise. This leads to a notion of resource states for measurement-based \\textit{classical} computation. Surprisingly, the Greenberger-Horne-Zeilinger and Clauser-Horne-Shimony-Holt problems emerge as optimal examples. Our work exposes an intriguing relationship between the violation of local realistic models and the computational power of entangled resource states.

Janet Anders; Dan E. Browne

2009-02-05T23:59:59.000Z

339

Power supply  

DOE Patents [OSTI]

A modular, low weight impedance dropping power supply with battery backup is disclosed that can be connected to a high voltage AC source and provide electrical power at a lower voltage. The design can be scaled over a wide range of input voltages and over a wide range of output voltages and delivered power.

Yakymyshyn, Christopher Paul (Seminole, FL); Hamilton, Pamela Jane (Seminole, FL); Brubaker, Michael Allen (Loveland, CO)

2007-12-04T23:59:59.000Z

340

Power marketing and renewable energy  

SciTech Connect (OSTI)

Power marketing refers to wholesale and retail transactions of electric power made by companies other than public power entities and the regulated utilities that own the generation and distribution lines. The growth in power marketing has been a major development in the electric power industry during the last few years, and power marketers are expected to realize even more market opportunities as electric industry deregulation proceeds from wholesale competition to retail competition. This Topical Issues Brief examines the nature of the power marketing business and its relationship with renewable power. The information presented is based on interviews conducted with nine power marketing companies, which accounted for almost 54% of total power sales by power marketers in 1995. These interviews provided information on various viewpoints of power marketers, their experience with renewables, and their respective outlooks for including renewables in their resource portfolios. Some basic differences exist between wholesale and retail competition that should be recognized when discussing power marketing and renewable power. At the wholesale level, the majority of power marketers stress the commodity nature of electricity. The primary criteria for developing resource portfolios are the same as those of their wholesale customers: the cost and reliability of power supplies. At the retail level, electricity may be viewed as a product that includes value-added characteristics or services determined by customer preferences.

Fang, J.M.

1997-09-01T23:59:59.000Z

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


341

Power options for lunar exploration  

SciTech Connect (OSTI)

This paper presents an overview of the types of power systems available for providing power on the moon. Lunar missions of exploration, in situ resource utilization, and colonization will be constrained by availability of adequate power. The length of the lunar night places severe limitations on solar power system designs, because a large portion of the system mass is devoted to energy storage. The selection of the ideal power source hardware will require compatibility with not only the lunar base power requirements and environment, but also with the conversion, storage, and transmission equipment. In addition, further analysis to determine the optimum operating parameters for a given power system should be conducted so that critical technologies can be identified in the early stages of base development. This paper describes the various concepts proposed for providing power on the lunar surface and compare their ranges of applicability. The importance of a systems approach to the integration of these components will also be discussed.

Bamberger, J.A.; Gaustad, K.L.

1992-01-01T23:59:59.000Z

342

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

E-Print Network [OSTI]

Air pollution: Coal based power plants major culprit : HindustanTimes.com http://www.hindustantimes.com/news/5922_1646830,001500250000000... 1 of 2 3/10/2006 7:45 AM Advertisement Friday, March 10, 2006 | 02 Archives » About Us Advertise Investors Register HindustanTimes.com » Print Editions » Lucknow » Metro » Pg

Singh, Ramesh P.

343

High power connection system  

DOE Patents [OSTI]

A high power connection system adapted for automotive environments which provides environmental and EMI shielding includes a female connector, a male connector, and a panel mount. The female connector includes a female connector base and a snap fitted female connector cover. The male connector includes a male connector base and a snap fitted male connector cover. The female connector base has at least one female power terminal cavity for seatably receiving a respective female power terminal. The male connector base has at least one male power terminal cavity for seatably receiving a respective male power terminal. The female connector is covered by a cover seal and a conductive shroud. A pair of lock arms protrude outward from the front end of the male connector base, pass through the panel mount and interface with a lever of a lever rotatably connected to the shroud to thereby mechanically assist mating of the male and female connectors. Safety terminals in the male and female connectors provide a last-to-connect-first-to-break connection with an HVIL circuit.

Schaefer, Christopher E. (Warren, OH); Beer, Robert C. (Noblesville, IN); McCall, Mark D. (Youngstown, OH)

2000-01-01T23:59:59.000Z

344

High Altitude Wind Power Systems: A Survey on Flexible Power Kites Mariam Ahmed*  

E-Print Network [OSTI]

High Altitude Wind Power Systems: A Survey on Flexible Power Kites Mariam Ahmed* Grenoble wind power using a kite-based system, and the proposed structures *Corresponding author Mariam.AHMED@g2

Boyer, Edmond

345

IEEE Power Engineering Society Conference Proceedings, SF, CA, June 12-16, 2005, to appear. An Agent-Based Computational Laboratory  

E-Print Network [OSTI]

, and the recommended use of locational marginal pricing and tradable financial transmission rights. All generators participating in restructured wholesale power markets must make repeated price and quantity offers prices across generators (general seller market power). They can also attempt to create locally

Tesfatsion, Leigh

346

Bacteria power may be possible http://www.masslive.com/hampfrank/republican/index.ssf?/base/news... 1 of 2 5/12/2006 2:33 PM  

E-Print Network [OSTI]

fuel cells powered by so-called geobacter, tiny bacteria that convert iron to electricity, to the point geobacter) to change that trash to electricity," Lovley said. A typical fuel cell converts fuels that conduct electricity to the outside for use as power. The UMass researchers found that when the geobacter

Lovley, Derek

347

Power LCAT  

ScienceCinema (OSTI)

POWER LCAT is a software tool used to compare elements of efficiency, cost, and environmental effects between different sources of energy.

Drennen, Thomas

2014-06-27T23:59:59.000Z

348

Power LCAT  

SciTech Connect (OSTI)

POWER LCAT is a software tool used to compare elements of efficiency, cost, and environmental effects between different sources of energy.

Drennen, Thomas

2012-08-15T23:59:59.000Z

349

IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 16, NO. 4, NOVEMBER 2001 935 Discussion of "A Physical-Flow-Based Approach to  

E-Print Network [OSTI]

to Allocating Transmission Losses in a Transaction Framework" George Gross and Shu Tao The authors are grateful, England. Publisher Item Identifier S 0885-8950(01)09812-1. 1G. Gross and S. Fao, IEEE Trans. Power Systems

Gross, George

350

Power Recovery  

E-Print Network [OSTI]

.POWER RECOVERY Fletcher Mlirray Monsanto Chemical Company AB5'-:::0 p.p., will ??vi.w 'h. '.ohnnln,y nf 'h.::v,n. T:X:~~T ~ methods for estimating the power recovery potential from fluid streams. The ideal gas law formula for expanding gases.... Gas Law Estimation Power recovery estimates from a vapor stream can be made using the formula: which is derived from the Ideal Gas Law. At first glance the. formula seems imposing and perhaps difficult to occasionally use. If however; the formula...

Murray, F.

351

Dynamic Testing of Wholesale Power Market Designs  

E-Print Network [OSTI]

Dynamic Testing of Wholesale Power Market Designs: An Open-Source Agent-Based Framework1 Junjie Sun ­ the Wholesale Power Market Platform (WPMP) ­ for common adoption by all U.S. wholesale power markets. Versions development and open-source implementation (in Java) of a computational wholesale power market organized

Tesfatsion, Leigh

352

Power combiner  

DOE Patents [OSTI]

A power combiner for the combining of symmetric and asymmetric traveling wave energy comprises a feed waveguide having an input port and a launching port, a reflector for reflecting launched wave energy, and a final waveguide for the collection and transport of launched wave energy. The power combiner has a launching port for symmetrical waves which comprises a cylindrical section coaxial to the feed waveguide, and a launching port for asymmetric waves which comprises a sawtooth rotated about a central axis.

Arnold, Mobius; Ives, Robert Lawrence

2006-09-05T23:59:59.000Z

353

Cleco Power- Power Miser New Home Program  

Broader source: Energy.gov [DOE]

Louisiana's Cleco Power offers energy efficiency incentives to eligible customers. Cleco Power offers a rate discount for residential customers building homes that meet the Power Miser Program...

354

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 47, NO. 8, AUGUST 1999 1449 Power Performance of InP-Based Single and  

E-Print Network [OSTI]

. I. Haddad are with the Solid-State Electronics Laboratory, Department of Electrical Engineering was with the Solid-State Electronics Laboratory, Department of Electrical Engineering and Computer Science to maximize battery lifetime. Due to their ability to handle high power densities at microwave frequencies

Yang, Kyounghoon

355

1016 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 45, NO. 5, MAY 2010 A Low-Power Capacitive Charge Pump Based  

E-Print Network [OSTI]

1016 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 45, NO. 5, MAY 2010 A Low-Power Capacitive Charge@eecg.toronto.edu). Digital Object Identifier 10.1109/JSSC.2010.2042524 In the interest of prolonging battery life in mobile

Johns, David A.

356

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

E-Print Network [OSTI]

processing. I. INTRODUCTION DUE to the limited power-supply capability of current battery technology voltage goes down. In [1], the techniques of "parallel processing" and "pipelining" were suggested to compensate the speed penalty, in which a simple comparator circuit was used to demonstrate how parallel

Liu, K. J. Ray

357

Abstract-This paper proposes a neural network based approach to estimating the maximum possible output power of a solar photovoltaic  

E-Print Network [OSTI]

on a shaded solar panel at different hours of a day for several days. After training the neural network, its, building-integrated photovoltaic panels, and portable solar tents, it is common for a solar PV to become output power of a solar photovoltaic array under the non-uniform shadow conditions at a given geographic

Lehman, Brad

358

Paper presented at the 2010 European Wind Energy Conference, Warsaw, Poland, 20-23 April 2010 Wind power prediction risk indices based on  

E-Print Network [OSTI]

Paper presented at the 2010 European Wind Energy Conference, Warsaw, Poland, 20-23 April 2010 Wind. I. INTRODUCTION Wind power is a rapidly growing renewable energy source increasing its share Siebert** and George Kariniotakis*** MINES ParisTech, CEP - Center for Energy and Processes BP 207, 06904

Paris-Sud XI, Université de

359

Analysis of microelectronic power distribution networks and exploration of 3D ICs  

E-Print Network [OSTI]

Regulator Based Power Distribution Design Under WorstTanmoy Roy. Power Distribution System Design Methodology andChen, “3D Power Distribution Network Co-design for Nanoscale

Hu, Xiang

2012-01-01T23:59:59.000Z

360

Power inverters  

DOE Patents [OSTI]

Power inverters include a frame and a power module. The frame has a sidewall including an opening and defining a fluid passageway. The power module is coupled to the frame over the opening and includes a substrate, die, and an encasement. The substrate includes a first side, a second side, a center, an outer periphery, and an outer edge, and the first side of the substrate comprises a first outer layer including a metal material. The die are positioned in the substrate center and are coupled to the substrate first side. The encasement is molded over the outer periphery on the substrate first side, the substrate second side, and the substrate outer edge and around the die. The encasement, coupled to the substrate, forms a seal with the metal material. The second side of the substrate is positioned to directly contact a fluid flowing through the fluid passageway.

Miller, David H. (Redondo Beach, CA); Korich, Mark D. (Chino Hills, CA); Smith, Gregory S. (Woodland Hills, CA)

2011-11-15T23:59:59.000Z

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


361

Power Projects  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 - September 2006PhotovoltaicSeptember 22,ReactorAbout Power > FinancialPower

362

Reactive power compensator  

DOE Patents [OSTI]

A system and method for determining and providing reactive power compensation for an inductive load. A reactive power compensator (50,50') monitors the voltage and current flowing through each of three distribution lines (52a, 52b, 52c), which are supplying three-phase power to one or more inductive loads. Using signals indicative of the current on each of these lines when the voltage waveform on the line crosses zero, the reactive power compensator determines a reactive power compensator capacitance that must be connected to the lines to maintain a desired VAR level, power factor, or line voltage. Alternatively, an operator can manually select a specific capacitance for connection to each line, or the capacitance can be selected based on a time schedule. The reactive power compensator produces control signals, which are coupled through optical fibers (102/106) to a switch driver (110, 110') to select specific compensation capacitors (112) for connections to each line. The switch driver develops triggering signals that are supplied to a plurality of series-connected solid state switches (350), which control charge current in one direction in respect to ground for each compensation capacitor. During each cycle, current flows from ground to charge the capacitors as the voltage on the line begins to go negative from its positive peak value. The triggering signals are applied to gate the solid state switches into a conducting state when the potential on the lines and on the capacitors reaches a negative peak value, thereby minimizing both the potential difference and across the charge current through the switches when they begin to conduct. Any harmonic distortion on the potential and current carried by the lines is filtered out from the current and potential signals used by the reactive power compensator so that it does not affect the determination of the required reactive compensation.

El-Sharkawi, Mohamed A. (Renton, WA); Venkata, Subrahmanyam S. (Woodinville, WA); Chen, Mingliang (Kirkland, WA); Andexler, George (Everett, WA); Huang, Tony (Seattle, WA)

1992-01-01T23:59:59.000Z

363

Reactive Power Compensator.  

DOE Patents [OSTI]

A system and method for determining and providing reactive power compensation for an inductive load. A reactive power compensator (50,50') monitors the voltage and current flowing through each of three distribution lines (52a, 52b, 52c), which are supplying three-phase power to one or more inductive loads. Using signals indicative of the current on each of these lines when the voltage waveform on the line crosses zero, the reactive power compensator determines a reactive power compensator capacitance that must be connected to the lines to maintain a desired VAR level, power factor, or line voltage. Alternatively, an operator can manually select a specific capacitance for connection to each line, or the capacitance can be selected based on a time schedule. The reactive power compensator produces control signals, which are coupled through optical fibers (102/106) to a switch driver (110, 110') to select specific compensation capacitors (112) for connections to each line. The switch driver develops triggering signals that are supplied to a plurality of series-connected solid state switches (350), which control charge current in one direction in respect to ground for each compensation capacitor. During each cycle, current flows from ground to charge the capacitors as the voltage on the line begins to go negative from its positive peak value. The triggering signals are applied to gate the solid state switches into a conducting state when the potential on the lines and on the capacitors reaches a negative peak value, thereby minimizing both the potential difference and across the charge current through the switches when they begin to conduct. Any harmonic distortion on the potential and current carried by the lines is filtered out from the current and potential signals used by the reactive power compensator so that it does not affect the determination of the required reactive compensation. 26 figs.

El-Sharkawi, M.A.; Venkata, S.S.; Chen, M.; Andexler, G.; Huang, T.

1992-07-28T23:59:59.000Z

364

Power Factor Compensation (PFC) Power Factor Compensation  

E-Print Network [OSTI]

Power Factor Compensation (PFC) Power Factor Compensation The power factor (PF) is defined as the ratio between the active power and the apparent power of a system. If the current and voltage are periodic with period , and [ ), then the active power is defined by ( ) ( ) (their inner product

Knobloch,JĂĽrgen

365

Star Power  

SciTech Connect (OSTI)

The U.S. Department of Energy's Princeton Plasma Physics Laboratory has released ''Star Power,'' a new informational video that uses dramatic and beautiful images and thought-provoking interviews to highlight the importance of the Laboratory's research into magnetic fusion.

None

2014-10-17T23:59:59.000Z

366

Star Power  

ScienceCinema (OSTI)

The U.S. Department of Energy's Princeton Plasma Physics Laboratory has released ''Star Power,'' a new informational video that uses dramatic and beautiful images and thought-provoking interviews to highlight the importance of the Laboratory's research into magnetic fusion.

None

2014-11-18T23:59:59.000Z

367

A PC-PCL-based control system for the high-voltage pulsed-power operation of the Intense Diagnostic Neutral Beam (IDNB) Experiment  

SciTech Connect (OSTI)

A stand-alone, semiautomated control system for the high-voltage pulsed-power energy sources on the Intense Diagnostic Neutral Beam Experiment at Los Alamos National Laboratory using personal computer (PC) and programmable logic controller (PLC) technology has been developed and implemented. The control system, consisting of a PC with the graphic operator interface, the network connecting the PC to the PLC, the PLC, the PLC I/O modules, fiber-optic interfaces and software, is described.

Gribble, R.

1993-06-01T23:59:59.000Z

368

Reuse of Produced Water from CO2 Enhanced Oil Recovery, Coal-Bed Methane, and Mine Pool Water by Coal-Based Power Plants  

SciTech Connect (OSTI)

Power generation in the Illinois Basin is expected to increase by as much as 30% by the year 2030, and this would increase the cooling water consumption in the region by approximately 40%. This project investigated the potential use of produced water from CO{sub 2} enhanced oil recovery (CO{sub 2}-EOR) operations; coal-bed methane (CBM) recovery; and active and abandoned underground coal mines for power plant cooling in the Illinois Basin. Specific objectives of this project were: (1) to characterize the quantity, quality, and geographic distribution of produced water in the Illinois Basin; (2) to evaluate treatment options so that produced water may be used beneficially at power plants; and (3) to perform a techno-economic analysis of the treatment and transportation of produced water to thermoelectric power plants in the Illinois Basin. Current produced water availability within the basin is not large, but potential flow rates up to 257 million liters per day (68 million gallons per day (MGD)) are possible if CO{sub 2}-enhanced oil recovery and coal bed methane recovery are implemented on a large scale. Produced water samples taken during the project tend to have dissolved solids concentrations between 10 and 100 g/L, and water from coal beds tends to have lower TDS values than water from oil fields. Current pretreatment and desalination technologies including filtration, adsorption, reverse osmosis (RO), and distillation can be used to treat produced water to a high quality level, with estimated costs ranging from $2.6 to $10.5 per cubic meter ($10 to $40 per 1000 gallons). Because of the distances between produced water sources and power plants, transportation costs tend to be greater than treatment costs. An optimization algorithm was developed to determine the lowest cost pipe network connecting sources and sinks. Total water costs increased with flow rate up to 26 million liters per day (7 MGD), and the range was from $4 to $16 per cubic meter ($15 to $60 per 1000 gallons), with treatment costs accounting for 13 â?? 23% of the overall cost. Results from this project suggest that produced water is a potential large source of cooling water, but treatment and transportation costs for this water are large.

Chad Knutson; Seyed Dastgheib; Yaning Yang; Ali Ashraf; Cole Duckworth; Priscilla Sinata; Ivan Sugiyono; Mark Shannon; Charles Werth

2012-04-30T23:59:59.000Z

369

CARIBBEAN COLLOQUIUM ON POWER QUALITY (CCPQ), JUNE 2003 100 Defining Reactive Power in Circuit Transients via  

E-Print Network [OSTI]

CARIBBEAN COLLOQUIUM ON POWER QUALITY (CCPQ), JUNE 2003 100 Defining Reactive Power in Circuit the notion of reactive power during circuit transients. The definition we propose is based on the concept, namely Short- Time Fourier Coefficients and Haar Wavelets. We illustrate this "dynamic" reactive power

Stankoviæ, Aleksandar

370

Multi-objective Optimal Power Flows to Evaluate Voltage Security Costs in Power Networks  

E-Print Network [OSTI]

1 Multi-objective Optimal Power Flows to Evaluate Voltage Security Costs in Power Networks William Abstract-- In this paper, new optimal power flow (OPF) tech- niques are proposed based on multi- dard power flow models. The results obtained using the proposed mixed OPFs are compared and analyzed

Cañizares, Claudio A.

371

Impact of Wind Shear and Tower Shadow Effects on Power System with Large Scale Wind Power  

E-Print Network [OSTI]

@et.aau.dk, csu@et.aau.dk, zch@et.aau.dk Abstract ­ Grid connected wind turbines are fluctuating power sources due on the power system small signal stability of wind turbines based on fixed-speed induction generators, doubly two interconnected power systems [9]. The wind power fluctuations produced by grid connected variable

Hu, Weihao

372

Health effects models for nuclear power plant accident consequence analysis. Modification of models resulting from addition of effects of exposure to alpha-emitting radionuclides: Revision 1, Part 2, Scientific bases for health effects models, Addendum 2  

SciTech Connect (OSTI)

The Nuclear Regulatory Commission (NRC) has sponsored several studies to identify and quantify, through the use of models, the potential health effects of accidental releases of radionuclides from nuclear power plants. The Reactor Safety Study provided the basis for most of the earlier estimates related to these health effects. Subsequent efforts by NRC-supported groups resulted in improved health effects models that were published in the report entitled {open_quotes}Health Effects Models for Nuclear Power Plant Consequence Analysis{close_quotes}, NUREG/CR-4214, 1985 and revised further in the 1989 report NUREG/CR-4214, Rev. 1, Part 2. The health effects models presented in the 1989 NUREG/CR-4214 report were developed for exposure to low-linear energy transfer (LET) (beta and gamma) radiation based on the best scientific information available at that time. Since the 1989 report was published, two addenda to that report have been prepared to (1) incorporate other scientific information related to low-LET health effects models and (2) extend the models to consider the possible health consequences of the addition of alpha-emitting radionuclides to the exposure source term. The first addendum report, entitled {open_quotes}Health Effects Models for Nuclear Power Plant Accident Consequence Analysis, Modifications of Models Resulting from Recent Reports on Health Effects of Ionizing Radiation, Low LET Radiation, Part 2: Scientific Bases for Health Effects Models,{close_quotes} was published in 1991 as NUREG/CR-4214, Rev. 1, Part 2, Addendum 1. This second addendum addresses the possibility that some fraction of the accident source term from an operating nuclear power plant comprises alpha-emitting radionuclides. Consideration of chronic high-LET exposure from alpha radiation as well as acute and chronic exposure to low-LET beta and gamma radiations is a reasonable extension of the health effects model.

Abrahamson, S. [Wisconsin Univ., Madison, WI (United States); Bender, M.A. [Brookhaven National Lab., Upton, NY (United States); Boecker, B.B.; Scott, B.R. [Lovelace Biomedical and Environmental Research Inst., Albuquerque, NM (United States). Inhalation Toxicology Research Inst.; Gilbert, E.S. [Pacific Northwest Lab., Richland, WA (United States)

1993-05-01T23:59:59.000Z

373

Power superconducting power transmission cable  

DOE Patents [OSTI]

The present invention is for a compact superconducting power transmission cable operating at distribution level voltages. The superconducting cable is a conductor with a number of tapes assembled into a subconductor. These conductors are then mounted co-planarly in an elongated dielectric to produce a 3-phase cable. The arrangement increases the magnetic field parallel to the tapes thereby reducing ac losses.

Ashworth, Stephen P. (Cambridge, GB)

2003-01-01T23:59:59.000Z

374

Power Right. Power Smart. Efficient Computer Power Supplies and...  

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

AC power that you get from your electric company into the DC power consumed by most electronics, including your computer. We expect our power supplies to be safe, reliable, and...

375

Computer-Based Procedures for Field Workers in Nuclear Power Plants: Development of a Model of Procedure Usage and Identification of Requirements  

SciTech Connect (OSTI)

The nuclear industry is constantly trying to find ways to decrease the human error rate, especially the human errors associated with procedure use. As a step toward the goal of improving procedure use performance, researchers, together with the nuclear industry, have been looking at replacing the current paper-based procedures with computer-based procedure systems. The concept of computer-based procedures is not new by any means; however most research has focused on procedures used in the main control room. Procedures reviewed in these efforts are mainly emergency operating procedures and normal operating procedures. Based on lessons learned for these previous efforts we are now exploring a more unknown application for computer based procedures - field procedures, i.e. procedures used by nuclear equipment operators and maintenance technicians. The Idaho National Laboratory and participants from the U.S. commercial nuclear industry are collaborating in an applied research effort with the objective of developing requirements and specifications for a computer-based procedure system to be used by field workers. The goal is to identify the types of human errors that can be mitigated by using computer-based procedures and how to best design the computer-based procedures to do so. This paper describes the development of a Model of Procedure Use and the qualitative study on which the model is based. The study was conducted in collaboration with four nuclear utilities and five research institutes. During the qualitative study and the model development requirements and for computer-based procedures were identified.

Katya Le Blanc; Johanna Oxstrand

2012-04-01T23:59:59.000Z

376

Silicon Valley Power and Oklahoma Municipal Power Authority Win...  

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

Silicon Valley Power and Oklahoma Municipal Power Authority Win 2014 Public Power Wind Awards Silicon Valley Power and Oklahoma Municipal Power Authority Win 2014 Public Power Wind...

377

Use of Air2Air Technology to Recover Fresh-Water from the Normal Evaporative Cooling Loss at Coal-Based Thermoelectric Power Plants  

SciTech Connect (OSTI)

This program was undertaken to build and operate the first Air2Air{trademark} Water Conservation Cooling Tower at a power plant, giving a validated basis and capability for water conservation by this method. Air2Air{trademark} water conservation technology recovers a portion of the traditional cooling tower evaporate. The Condensing Module provides an air-to-air heat exchanger above the wet fill media, extracting the heat from the hot saturated moist air leaving in the cooling tower and condensing water. The rate of evaporate water recovery is typically 10%-25% annually, depending on the cooling tower location (climate).

Ken Mortensen

2009-06-30T23:59:59.000Z

378

StationaryEnvironment ResidentialTransportation Premium Power Advanced High Efficiency, Quick Start Fuel  

E-Print Network [OSTI]

Premium Power Agenda STARTM (1999-2003) ­ Substrate based Transportation application Autothermal ReformerEnvironment Residential Stationary Premium Power STAR Fuel Processor · Autothermal reformer · Substrate-based catalysts

379

Nuclear power high technology colloquium: proceedings  

SciTech Connect (OSTI)

Reports presenting information on technology advancements in the nuclear industry and nuclear power plant functions have been abstracted and are available on the energy data base.

Not Available

1984-12-10T23:59:59.000Z

380

Microsoft PowerPoint - Steve_Spinner  

Office of Environmental Management (EM)

facilities 2.0 billion - for "front end" nuclear fuel cycle facilities 8.0 billion - coal based power generation, industrial gasification & carbon capture & sequestration...

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


381

Direct-Cooled Power Electronic Substrate  

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

of Energy 3 Barriers VTP Activities Related Challenges Conventional cooling methods for power electronics are typically based on conduction cooling through solids directly adjacent...

382

PO. 254 Control of Power Train Loads  

E-Print Network [OSTI]

Abstract summary Variable loads along the power train are the primary cause attributed to the failure of gears, bearings, and other mechanical components. The concept of anticipatory control applied to a wind power train is presented. This new approach to power train load management is based on the data reflecting the current status of the power train. The model driving the optimization of the power train loads considers four different objectives, including minimization of the torque variability and power maximization. A software tool for power train load management is presented. This new approach to power train load control is based on the data reflecting the current status of the power train. Such data is collected by a typical SCADA system. The model driving the optimization of the power train loads considers four different objectives, including minimization of the torque variability and power maximization. Details of the model that is applicable to different turbines are presented Objectives Goal: Transform a wind a farm into a wind power plant Example objectives: ? Minimization of the torque ramp rate ? Maximization of the power produced ? Maximization of the power quality Modify the shape of the power curve Methods Data mining/Knowledge discovery

Andrew Kusiak

383

GEYSERS POWER COMPANY, LLC 10350 Socrates Mine Road  

E-Print Network [OSTI]

as the "Occidental (OXY) Geothermal Power Plant No. I), Docket 81-AFC-1 Submitted by Geysers Power Company, LLC-4 for the Calistoga Power Plant (formerly known as the "Occidental (OXY) Geothermal Power Plant No. l), regarding for the Calpine Geothermal Power Plant". Based on these twenty years of studies and

384

Wind power and Wind power and  

E-Print Network [OSTI]

Wind power and the CDM #12; Wind power and the CDM Emerging practices in developing wind power 2005 Jyoti P. Painuly, Niels-Erik Clausen, Jørgen Fenhann, Sami Kamel and Romeo Pacudan #12; WIND POWER AND THE CDM Emerging practices in developing wind power projects for the Clean Development Mechanism Energy

385

48 OCTOBER | 2010 Near Term Power PredicTioN  

E-Print Network [OSTI]

48 OCTOBER | 2010 Near Term Power PredicTioN wiNd eNergy is becomiNg a sigNificaNT player are presented. The first model for power prediction is developed based on the power curve equation [1 equation, data-mining algorithms can be directly applied to predict the power based on parameters

Kusiak, Andrew

386

Maybe you've heard about The 7 Habits of Highly Effective People--the best-selling business book of all time. Now you have a chance to implement the 7 Habits in your life by attending an exciting three-day program based on the powerful book.  

E-Print Network [OSTI]

Maybe you've heard about The 7 Habits of Highly Effective People--the best-selling business book-day program based on the powerful book. The 7 Habits program is the most dynamic training for personal

Cui, Yan

387

Low-Power Maximum Power Point Tracker with Digital Control for Thermophotovoltaic Generators  

E-Print Network [OSTI]

This paper describes the design, optimization, and evaluation of the power electronics circuitry for a low-power portable thermophotovotaic (TPV) generator system. TPV system is based on a silicon micro-reactor design and ...

Pilawa, Robert

388

Wind Power  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched FerromagnetismWaste and MaterialsWenjun DengWISPWind Industry Soars to New1Wind Power

389

Environmental externalities: Applying the concept to Asian coal-based power generation. [Includes external environmental and societal costs and methods of evaluating them  

SciTech Connect (OSTI)

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

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

1993-03-01T23:59:59.000Z

390

Status of Planning Fusion Power Associates Meeting  

E-Print Network [OSTI]

Steady-state power supplies Cooling for divertor, vacuum vessel, ... Baffle (Module 18) pellet injector% of ICRH antenna + all transmission lines, RF-sources, and power supplies Start-up gyrotrons, all transmission lines and power supplies 15% of port-based diagnostic packages 4 of 7 Central Solenoid Modules

391

North Carolina State University | College of Engineering | 919-515-3480 | www.nccleantech.ncsu.edu North Carolina State University, Campus Box 7409, Raleigh, NC 27695 | 1 919-515-3480 | www.ncleantech.ncsu.edu 2014  

E-Print Network [OSTI]

Wind Geothermal Biomass Clean Power & Energy Efficiency Combined Heat & Power Waste Heat Recovery District Energy Smart grid/Micro-grid Clean Transportation/Alternative Fuels Workforce Development/feasibility studies Combined Heat & Power site qualification & feasi- bility analysis Wind resource studies Clean

392

Clean Power at Home  

E-Print Network [OSTI]

this report is to describe and analyze net metering as a mechanism to support the deployment of small-scale, distributed electricity technologies in British Columbia based on renewable energy sources. These are referred to as "distributed renewables" throughout the report. The deployment of distributed renewables offers several environmental, economic, and social benefits that are described in this paper. Net metering enables individual utility customers to connect on-site generation to the utility grid, feeding excess power back to the grid when it is not needed, and utilizing grid power when consumption exceeds local renewable energy supply. In most programs, a single meter measures the customer's net consumption of grid power in a billing period, and they are charged for that consumption under regular retail rates. If production exceeds consumption, the customer's bill is essentially zero. In some instances, utilities may refund customers for excess production in a billing period based on wholesale market prices or avoided production costs. Net metering programs can make self-generation more attractive for customers by eliminating the need to size systems to meet customers' exact power needs or install on-site storage and power conditioning devices. Utilities may, depending upon the type of systems installed, benefit from improvements in local area load factors, and receive credit for various social or environmental benefits of such resources (e.g., greenhouse gas reductions). However, utilities have raised concerns about worker safety (e.g., the possibility that net metering sites may continue to feed electricity into the local distribution grid when the rest of the network is down, putting line workers at risk) and possible financial cross-subsidies from other rate...

May Author Andrew; Andrew E. Pape

393

A Tariff for Reactive Power  

SciTech Connect (OSTI)

Two kinds of power are required to operate an electric power system: real power, measured in watts, and reactive power, measured in volt-amperes reactive or VARs. Reactive power supply is one of a class of power system reliability services collectively known as ancillary services, and is essential for the reliable operation of the bulk power system. Reactive power flows when current leads or lags behind voltage. Typically, the current in a distribution system lags behind voltage because of inductive loads such as motors. Reactive power flow wastes energy and capacity and causes voltage droop. To correct lagging power flow, leading reactive power (current leading voltage) is supplied to bring the current into phase with voltage. When the current is in phase with voltage, there is a reduction in system losses, an increase in system capacity, and a rise in voltage. Reactive power can be supplied from either static or dynamic VAR sources. Static sources are typically transmission and distribution equipment, such as capacitors at substations, and their cost has historically been included in the revenue requirement of the transmission operator (TO), and recovered through cost-of-service rates. By contrast, dynamic sources are typically generators capable of producing variable levels of reactive power by automatically controlling the generator to regulate voltage. Transmission system devices such as synchronous condensers can also provide dynamic reactive power. A class of solid state devices (called flexible AC transmission system devices or FACTs) can provide dynamic reactive power. One specific device has the unfortunate name of static VAR compensator (SVC), where 'static' refers to the solid state nature of the device (it does not include rotating equipment) and not to the production of static reactive power. Dynamic sources at the distribution level, while more costly would be very useful in helping to regulate local voltage. Local voltage regulation would reduce system losses, increase circuit capacity, increase reliability, and improve efficiency. Reactive power is theoretically available from any inverter-based equipment such as photovoltaic (PV) systems, fuel cells, microturbines, and adjustable-speed drives. However, the installation is usually only economical if reactive power supply is considered during the design and construction phase. In this report, we find that if the inverters of PV systems or the generators of combined heat and power (CHP) systems were designed with capability to supply dynamic reactive power, they could do this quite economically. In fact, on an annualized basis, these inverters and generators may be able to supply dynamic reactive power for about $5 or $6 per kVAR. The savings from the local supply of dynamic reactive power would be in reduced losses, increased capacity, and decreased transmission congestion. The net savings are estimated to be about $7 per kVAR on an annualized basis for a hypothetical circuit. Thus the distribution company could economically purchase a dynamic reactive power service from customers for perhaps $6/kVAR. This practice would provide for better voltage regulation in the distribution system and would provide an alternate revenue source to help amortize the cost of PV and CHP installations. As distribution and transmission systems are operated under rising levels of stress, the value of local dynamic reactive supply is expected to grow. Also, large power inverters, in the range of 500 kW to 1 MW, are expected to decrease in cost as they become mass produced. This report provides one data point which shows that the local supply of dynamic reactive power is marginally profitable at present for a hypothetical circuit. We expect that the trends of growing power flow on the existing system and mass production of inverters for distributed energy devices will make the dynamic supply of reactive power from customers an integral component of economical and reliable system operation in the future.

Kueck, John D [ORNL; Kirby, Brendan J [ORNL; Li, Fangxing [ORNL; Tufon, Christopher [Pacific Gas and Electric Company; Isemonger, Alan [California Independent System Operator

2008-07-01T23:59:59.000Z

394

FUTURE POWER GRID INITIATIVE Future Power Grid  

E-Print Network [OSTI]

FUTURE POWER GRID INITIATIVE Future Power Grid Control Paradigm OBJECTIVE This project integration & exploit the potential of distributed smart grid assets » Significantly reduce the risk of advanced mathematical models, next- generation simulation and analytics capabilities for the power grid

395

Southwestern Power Administration  

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

Courses Instructors NERC Continuing Education Power Operations Training Center You'll find the "Power" of learning at Southwestern's Power Operations Training Center (POTC). POTC's...

396

ELECTROCHEMICAL POWER FOR TRANSPORTATION  

E-Print Network [OSTI]

and Battery-Electric Powered Special Purpose Vehicles, SAELead-Acid Powered Electric Vehicles, Fifth Internationalmeantime, battery-powered electric vehicles can be expected

Cairns, Elton J.

2012-01-01T23:59:59.000Z

397

Solar powered desalination system  

E-Print Network [OSTI]

2008, uses concentrated solar power to split water. Figurethe main reason the potential for solar power is boundless.a clean energy source, solar power is inexhaustible, fairly

Mateo, Tiffany Alisa

2011-01-01T23:59:59.000Z

398

Power management system  

DOE Patents [OSTI]

A method of managing power resources for an electrical system of a vehicle may include identifying enabled power sources from among a plurality of power sources in electrical communication with the electrical system and calculating a threshold power value for the enabled power sources. A total power load placed on the electrical system by one or more power consumers may be measured. If the total power load exceeds the threshold power value, then a determination may be made as to whether one or more additional power sources is available from among the plurality of power sources. At least one of the one or more additional power sources may be enabled, if available.

Algrain, Marcelo C. (Peoria, IL); Johnson, Kris W. (Washington, IL); Akasam, Sivaprasad (Peoria, IL); Hoff, Brian D. (East Peoria, IL)

2007-10-02T23:59:59.000Z

399

2010 IREP Symposium-Bulk Power System Dynamics and Control VIII (IREP), August 1-6, 2010, Buzios, RJ, Brazil Resource-Adequacy-Based Capacity Market Design  

E-Print Network [OSTI]

, RJ, Brazil Resource-Adequacy-Based Capacity Market Design Matias Negrete-Pincetic George Gross Abstract. - Today's capacity markets may be viewed as an additional source of income for generators analyze key aspects of today's capacity market designs. Our main finding is that some design elements help

Gross, George

400

Power oscillator  

DOE Patents [OSTI]

An oscillator includes an amplifier having an input and an output, and an impedance transformation network connected between the input of the amplifier and the output of the amplifier, wherein the impedance transformation network is configured to provide suitable positive feedback from the output of the amplifier to the input of the amplifier to initiate and sustain an oscillating condition, and wherein the impedance transformation network is configured to protect the input of the amplifier from a destructive feedback signal. One example of the oscillator is a single active element device capable of providing over 70 watts of power at over 70% efficiency. Various control circuits may be employed to match the driving frequency of the oscillator to a plurality of tuning states of the lamp.

Gitsevich, Aleksandr (Montgomery Village, MD)

2001-01-01T23:59:59.000Z

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


401

Enhanced optical power of GaN-based light-emitting diode with compound photonic crystals by multiple-exposure nanosphere-lens lithography  

SciTech Connect (OSTI)

The light-emitting diodes (LEDs) with single, twin, triple, and quadruple photonic crystals (PCs) on p-GaN are fabricated by multiple-exposure nanosphere-lens lithography (MENLL) process utilizing the focusing behavior of polystyrene spheres. Such a technique is easy and economical for use in fabricating compound nano-patterns. The optimized tilted angle is decided to be 26.6° through mathematic calculation to try to avoid the overlay of patterns. The results of scanning electron microscopy and simulations reveal that the pattern produced by MENLL is a combination of multiple ovals. Compared to planar-LED, the light output power of LEDs with single, twin, triple, and quadruple PCs is increased by 14.78%, 36.03%, 53.68%, and 44.85% under a drive current 350?mA, respectively. Furthermore, all PC-structures result in no degradation of the electrical properties. The stimulated results indicate that the highest light extraction efficiency of LED with the clover-shape triple PC is due to the largest scattering effect on propagation of light from GaN into air.

Zhang, Yonghui; Wei, Tongbo, E-mail: tbwei@semi.ac.cn; Xiong, Zhuo; Shang, Liang; Tian, Yingdong; Zhao, Yun; Zhou, Pengyu; Wang, Junxi; Li, Jinmin [Semiconductor Lighting Technology Research and Development Center, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 (China)

2014-07-07T23:59:59.000Z

402

Solar powered desalination system  

E-Print Network [OSTI]

1.18: Largest PV Power Plants……………………………………………………32 TableTable 1.18: Largest PV Power Plants 19 Power (MW) LocationWorld Canada, Sarnia PV power plant Sarnia (Ontario) Italy,

Mateo, Tiffany Alisa

2011-01-01T23:59:59.000Z

403

Evaluation of the Emission, Transport, and Deposition of Mercury, Fine Particulate Matter, and Arsenic from Coal-Based Power Plants in the Ohio River Valley Region  

SciTech Connect (OSTI)

Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NOx, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately of 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg0, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by U.S. EPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.

Kevin Crist

2005-10-02T23:59:59.000Z

404

Wireless Power Transfer  

SciTech Connect (OSTI)

Wireless Power Transfer is an innovative approach using magnetic resonance coupling of air core transformers designed for today's growing plug-in electric vehicle market. This technology can provide a convenient, safe and flexible means to charge electric vehicles under stationary and dynamic conditions. Plug-in Electric Vehicles (PEV) are burdened by the need for cable and plug charger, galvanic isolation of the on-board electronics, bulk and cost of this charger and the large energy storage system (ESS) packs needed. With a system where you have to physically plug in there are a number of occasions where the owner could very well forget to charge the vehicle. For stationary applications (like charging of a PHEV at home), ORNL's innovative wireless power transfer technology adds a convenience factor compared to actually plugging in which will mean that the vehicle will have a full charge every morning. Electric vehicle charging must be safe, compact and efficient in order to be convenient for customers. By reconfiguring the transformer and altering the resonance frequency, energy is transferred to the battery with lower energy losses and with fewer demands on the primary circuit by the rest of the transformer system. The ORNL discovery shows that sufficient power for the battery can be transferred from the primary to secondary circuits without significant energy losses if the operating frequency is set at 50% to 95% of the resonance frequency of the circuit. The electrical power is then transmitted to the chargeable battery, which is electrically coupled to the secondary circuit through the air core transformer. Some advantages include: Reduced energy losses during transfer of energy to the battery; A charge potential that is relatively unaffected by up to 25% misalignment of vehicle; and Other receiving components draw less power from the primary circuit. These advantages allow wireless power technology applications to expand at the workplace and beyond as the demand for EV rises. For vehicles that operate over a fixed route such as busses and shuttle vehicles, Wireless Power Transfer (WPT) means that a smaller battery pack can be used. In the traditional system, the battery pack is designed to accommodate the needs of the entire route or shift. With WPT the battery can be downsized because it can be charged when the vehicle stops on its route (a rental car shuttle bus, for example, can charge when it waits in the terminal and again when it waits at the rental car place. Thus the battery only needs enough charge to get to the next stop. This decrease in battery size means significant cost savings to electrify the vehicle. This technology enables efficient "opportunity charging stations" for predefined routes and planned stops reducing down time. Charging can occur in minutes. This improvement also eliminates the harmful emissions that occur in garages while buses are at idle during charging. In larger cities, dynamic charging offers an even greater impact utilizing existing infrastructure. As vehicles travel along busy freeways and interstate systems, wireless charging can occur while the vehicle is in motion. With this technology a vehicle essentially has unlimited electric range while using a relatively small battery pack. In-motion charging stations use vehicle sensors to alert the driver. Traveling at normal speeds, sensors establish in-motion charging. WPT transmit pads sequentially energize to the negotiated power level based on vehicle speed and its requested charging energy. Lower power when vehicle speed is slow and much higher power for faster moving vehicles. Vehicle to Infrastructure communications (V2I) coordinates WPT charging level according to on-board battery pack state-of-charge. V2I activates the roadway transmit pads placing them in standby mode and negotiates charging fee based on prevailing grid rate and vehicle energy demand. Dynamic charging would allow electricity to supply a very large fraction of the energy for the transportation sector and reduce greatly petroleum consump

None

2013-07-22T23:59:59.000Z

405

Wireless Power Transfer  

ScienceCinema (OSTI)

Wireless Power Transfer is an innovative approach using magnetic resonance coupling of air core transformers designed for today's growing plug-in electric vehicle market. This technology can provide a convenient, safe and flexible means to charge electric vehicles under stationary and dynamic conditions. Plug-in Electric Vehicles (PEV) are burdened by the need for cable and plug charger, galvanic isolation of the on-board electronics, bulk and cost of this charger and the large energy storage system (ESS) packs needed. With a system where you have to physically plug in there are a number of occasions where the owner could very well forget to charge the vehicle. For stationary applications (like charging of a PHEV at home), ORNL's innovative wireless power transfer technology adds a convenience factor compared to actually plugging in which will mean that the vehicle will have a full charge every morning. Electric vehicle charging must be safe, compact and efficient in order to be convenient for customers. By reconfiguring the transformer and altering the resonance frequency, energy is transferred to the battery with lower energy losses and with fewer demands on the primary circuit by the rest of the transformer system. The ORNL discovery shows that sufficient power for the battery can be transferred from the primary to secondary circuits without significant energy losses if the operating frequency is set at 50% to 95% of the resonance frequency of the circuit. The electrical power is then transmitted to the chargeable battery, which is electrically coupled to the secondary circuit through the air core transformer. Some advantages include: Reduced energy losses during transfer of energy to the battery; A charge potential that is relatively unaffected by up to 25% misalignment of vehicle; and Other receiving components draw less power from the primary circuit. These advantages allow wireless power technology applications to expand at the workplace and beyond as the demand for EV rises. For vehicles that operate over a fixed route such as busses and shuttle vehicles, Wireless Power Transfer (WPT) means that a smaller battery pack can be used. In the traditional system, the battery pack is designed to accommodate the needs of the entire route or shift. With WPT the battery can be downsized because it can be charged when the vehicle stops on its route (a rental car shuttle bus, for example, can charge when it waits in the terminal and again when it waits at the rental car place. Thus the battery only needs enough charge to get to the next stop. This decrease in battery size means significant cost savings to electrify the vehicle. This technology enables efficient "opportunity charging stations" for predefined routes and planned stops reducing down time. Charging can occur in minutes. This improvement also eliminates the harmful emissions that occur in garages while buses are at idle during charging. In larger cities, dynamic charging offers an even greater impact utilizing existing infrastructure. As vehicles travel along busy freeways and interstate systems, wireless charging can occur while the vehicle is in motion. With this technology a vehicle essentially has unlimited electric range while using a relatively small battery pack. In-motion charging stations use vehicle sensors to alert the driver. Traveling at normal speeds, sensors establish in-motion charging. WPT transmit pads sequentially energize to the negotiated power level based on vehicle speed and its requested charging energy. Lower power when vehicle speed is slow and much higher power for faster moving vehicles. Vehicle to Infrastructure communications (V2I) coordinates WPT charging level according to on-board battery pack state-of-charge. V2I activates the roadway transmit pads placing them in standby mode and negotiates charging fee based on prevailing grid rate and vehicle energy demand. Dynamic charging would allow electricity to supply a very large fraction of the energy for the transportation sector and reduce greatly petroleum consump

None

2013-11-19T23:59:59.000Z

406

Over-Current Protection Scheme for SiC Power MOSFET DC Circuit Breaker  

E-Print Network [OSTI]

V. Radun, “SiC based solid state power controller,” in 23tha solid-state circuit breaker based on SiC power MOSFET withSolid-state DC circuit breakers made of the modern wide bandgap power

Zhang, Yuan; Liang, Yung C.

2015-01-01T23:59:59.000Z

407

Active region based on graded-gap InGaN/GaN superlattices for high-power 440- to 470-nm light-emitting diodes  

SciTech Connect (OSTI)

The structural and optical properties of light-emitting diode structures with an active region based on ultrathin InGaN quantum wells limited by short-period InGaN/GaN superlattices from both sides have been investigated. The dependences of the external quantum efficiency on the active region design are analyzed. It is shown that the use of InGaN/GaN structures as limiting graded-gap short-period superlattices may significantly increase the quantum efficiency.

Tsatsulnikov, A. F., E-mail: Andrew@beam.ioffe.ru; Lundin, W. V.; Sakharov, A. V.; Zavarin, E. E.; Usov, S. O.; Nikolaev, A. E.; Cherkashin, N. A.; Ber, B. Ya.; Kazantsev, D. Yu. [Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation); Mizerov, M. N. [Russian Academy of Sciences, Center for Microelectronics, Ioffe Physicotechnical Institute (Russian Federation); Park, Hee Seok [Samsung Electro-Mechanics Co. Ltd. (Korea, Republic of); Hytch, M.; Hue, F. [National Center for Scientific Research, Center for Material Elaboration and Structural Studies (France)

2010-01-15T23:59:59.000Z

408

Village Power `97. Proceedings  

SciTech Connect (OSTI)

It is estimated that two billion people live without electricity and its services. In addition, there is a sizable number of rural villages that have limited electrical service, with either part-day operation by diesel gen-sets or partial electrification (local school or community center and several nearby houses). For many villages connected to the grid, power is often sporadically available and of poor quality. The U.S. National Renewable Energy Laboratory (NREL) in Golden, Colorado, has initiated a program to address these potential electricity opportunities in rural villages through the application of renewable energy (RE) technologies. The objective of this program is to develop and implement applications that demonstrate the technical performance, economic competitiveness, operational viability, and environmental benefits of renewable rural electric solutions, compared to the conventional options of line extension and isolated diesel mini-grids. These four attributes foster sustainability; therefore, the program is entitled Renewables for Sustainable Village Power (RSVP). The RSVP program is a multi-disciplinary, multi-technology, multi-application program composed of six key activities, including village application development, computer model development, systems analysis, pilot project development, technical assistance, and an Internet-based village power project database. The current program emphasizes wind, photovoltaics (PV), and their hybrids with diesel gen-sets. NREL`s RSVP team is currently involved in rural electricity projects in thirteen countries, with U.S., foreign, and internationally based agencies and institutions. This document contains reports presented at the Proceedings of Village Power, 1997. Individual projects have been processed separately for the United States Department of Energy databases.

Cardinal, J.; Flowers, L.; Taylor, R.; Weingart, J. [eds.

1997-09-01T23:59:59.000Z

409

Wind Power Career Chat  

SciTech Connect (OSTI)

This document will teach students about careers in the wind energy industry. Wind energy, both land-based and offshore, is expected to provide thousands of new jobs in the next several decades. Wind energy companies are growing rapidly to meet America's demand for clean, renewable, and domestic energy. These companies need skilled professionals. Wind power careers will require educated people from a variety of areas. Trained and qualified workers manufacture, construct, operate, and manage wind energy facilities. The nation will also need skilled researchers, scientists, and engineers to plan and develop the next generation of wind energy technologies.

Not Available

2011-01-01T23:59:59.000Z

410

IEEE TRANSACTIONS ON POWER ELECTRONICS 1 A Hybrid Power Control Concept for PV Inverters with Reduced  

E-Print Network [OSTI]

- cept for grid-connected Photovoltaic (PV) inverters. The control strategy is based on either a Maximum concept. Index Terms--Photovoltaic inverters, constant power genera- tion, maximum power point tracking, efficiency, thermal loading, reliability. I. INTRODUCTION MAXIMUM Power Point Tracking (MPPT) is effective

Kerekes, Tamas

411

Dynamic Power Management with Hybrid Power Sources Jianli Zhuo Chaitali Chakrabarti  

E-Print Network [OSTI]

source. Al- ternative power sources such as fuel cells (FCs) have substantially different power-time systems and embedded systems General Terms: Algorithms, Design Keywords: DPM, fuel cell, hybrid power based hybrid source. We develop an optimization framework that explicitly considers the FC system

Kambhampati, Subbarao

412

LIFE Power Plant Fusion Power Associates  

E-Print Network [OSTI]

LIFE Power Plant Fusion Power Associates December 14, 2011 Mike Dunne LLNL #12;NIf-1111-23714.ppt LIFE power plant 2 #12;LIFE delivery timescale NIf-1111-23714.ppt 3 #12;Timely delivery is enabled dpa) § Removes ion threat and mitigates x-ray threat ­ allows simple steel piping § No need

413

Wave Power Demonstration Project at Reedsport, Oregon  

SciTech Connect (OSTI)

Ocean wave power can be a significant source of large?scale, renewable energy for the US electrical grid. The Electrical Power Research Institute (EPRI) conservatively estimated that 20% of all US electricity could be generated by wave energy. Ocean Power Technologies, Inc. (OPT), with funding from private sources and the US Navy, developed the PowerBuoy? to generate renewable energy from the readily available power in ocean waves. OPT's PowerBuoy converts the energy in ocean waves to electricity using the rise and fall of waves to move the buoy up and down (mechanical stroking) which drives an electric generator. This electricity is then conditioned and transmitted ashore as high?voltage power via underwater cable. OPT's wave power generation system includes sophisticated techniques to automatically tune the system for efficient conversion of random wave energy into low cost green electricity, for disconnecting the system in large waves for hardware safety and protection, and for automatically restoring operation when wave conditions normalize. As the first utility scale wave power project in the US, the Wave Power Demonstration Project at Reedsport, OR, will consist of 10 PowerBuoys located 2.5 miles off the coast. This U.S. Department of Energy Grant funding along with funding from PNGC Power, an Oregon?based electric power cooperative, was utilized for the design completion, fabrication, assembly and factory testing of the first PowerBuoy for the Reedsport project. At this time, the design and fabrication of this first PowerBuoy and factory testing of the power take?off subsystem are complete; additionally the power take?off subsystem has been successfully integrated into the spar.

Mekhiche, Mike [Principal Investigator] [Principal Investigator; Downie, Bruce [Project Manager] [Project Manager

2013-10-21T23:59:59.000Z

414

Solar powered desalination system  

E-Print Network [OSTI]

of the electrical power output to the solar power input), aSolar Energy Calculator using Google Maps 23 Table 1.24: PV System Power Production Average Daily Irradiance (kWh/m2) Instillation Efficiency Labeled Efficiency Output

Mateo, Tiffany Alisa

2011-01-01T23:59:59.000Z

415

Microturbine Power Conversion Technology Review  

SciTech Connect (OSTI)

In this study, the Oak Ridge National Laboratory (ORNL) is performing a technology review to assess the market for commercially available power electronic converters that can be used to connect microturbines to either the electric grid or local loads. The intent of the review is to facilitate an assessment of the present status of marketed power conversion technology to determine how versatile the designs are for potentially providing different services to the grid based on changes in market direction, new industry standards, and the critical needs of the local service provider. The project includes data gathering efforts and documentation of the state-of-the-art design approaches that are being used by microturbine manufacturers in their power conversion electronics development and refinement. This project task entails a review of power converters used in microturbines sized between 20 kW and 1 MW. The power converters permit microturbine generators, with their non-synchronous, high frequency output, to interface with the grid or local loads. The power converters produce 50- to 60-Hz power that can be used for local loads or, using interface electronics, synchronized for connection to the local feeder and/or microgrid. The power electronics enable operation in a stand-alone mode as a voltage source or in grid-connect mode as a current source. Some microturbines are designed to automatically switch between the two modes. The information obtained in this data gathering effort will provide a basis for determining how close the microturbine industry is to providing services such as voltage regulation, combined control of both voltage and current, fast/seamless mode transfers, enhanced reliability, reduced cost converters, reactive power supply, power quality, and other ancillary services. Some power quality improvements will require the addition of storage devices; therefore, the task should also determine what must be done to enable the power conversion circuits to accept a varying dc voltage source. The study will also look at technical issues pertaining to the interconnection and coordinated/compatible operation of multiple microturbines. It is important to know today if modifications to provide improved operation and additional services will entail complete redesign, selected component changes, software modifications, or the addition of power storage devices. This project is designed to provide a strong technical foundation for determining present technical needs and identifying recommendations for future work.

Staunton, R.H.

2003-07-21T23:59:59.000Z

416

Concentrated Solar Thermoelectric Power  

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

CONCENTRATING SOLAR POWER PROGRAM REVIEW 2013 Concentrated Solar Thermoelectric Power Principal Investigator: Prof. Gang Chen Massachusetts Institute of Technology Cambridge, MA...

417

Power System Dispatcher  

Broader source: Energy.gov [DOE]

(See Frequently Asked Questions for more information). Where would I be working? Western Area Power Administration Rocky Mountain Region Power System Operations, (J4800) Transmission Scheduling and...

418

Electrolytes for power sources  

DOE Patents [OSTI]

Electrolytes are disclosed for power sources, particularly alkaline and acidic power sources, comprising benzene polysulfonic acids and benzene polyphosphonic acids or salts of such acids. 7 figures.

Doddapaneni, N.; Ingersoll, D.

1995-01-03T23:59:59.000Z

419

Southwestern Power Administration  

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

POTC Home Courses Instructors NERC Continuing Education 2014 Power Operations Training Center Courses The 2014 Power Operations Training Center course schedule is currently being...

420

HOUSEHOLD SOLAR POWER SYSTEM.  

E-Print Network [OSTI]

?? Photovoltaic power has become one of the most popular research area in new energy field. In this report, the case of household solar power… (more)

Jiang, He

2014-01-01T23:59:59.000Z

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


421

Concentrated Solar Power Generation.  

E-Print Network [OSTI]

??Solar power generation is the most promising technology to transfer energy consumption reliance from fossil fuel to renewable sources. Concentrated solar power generation is a… (more)

Jin, Zhilei

2013-01-01T23:59:59.000Z

422

Solar powered desalination system  

E-Print Network [OSTI]

As a clean energy source, solar power is inexhaustible,renewables for energy sources, including solar power. Also,Requirements Energy Source Natural Gas Nuclear Solar Wind

Mateo, Tiffany Alisa

2011-01-01T23:59:59.000Z

423

M-C Power`s product design and improvement  

SciTech Connect (OSTI)

The sole mission of M-C Power is the development and subsequent commercialization of molten carbonate fuel cell (MCFC) stacks. These MCFC stacks are based on the Internally Manifolded Heat EXchanger plate design developed by the Institute of Gas Technology. Integration of the MCFC stack into a commercially viable power plant is the mission of the IMHEX{sup {reg_sign}} team. The team is composed of leaders in the packaging and design of power generation equipment, including fuel cell technology, and includes Stewart & Stevenson, Bechtel, The Institute of Gas Technology and M-C Power. In an effort to succeed in their respective missions, M-C Power and the IMHEX{sup {reg_sign}} team have developed a commercialization program. At the present time, the team is making the transition from Phase I (Technology Development) to Phase II (Product Design & Improvement) of the program. Phase II`s objective is a commercially viable (cost effective and technologically reliable) MCFC power plant ready for market by the turn of the century.

Scroppo, J.A.; Laurens, R.M.; Petraglia, V.J.

1995-12-31T23:59:59.000Z

424

Assessment of Combined Heat and Power Premium Power Applications...  

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

Assessment of Combined Heat and Power Premium Power Applications in California, September 2008 Assessment of Combined Heat and Power Premium Power Applications in California,...

425

Wind Powering America Webinar: Wind Power Economics: Past, Present...  

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

Wind Powering America Webinar: Wind Power Economics: Past, Present, and Future Trends Wind Powering America Webinar: Wind Power Economics: Past, Present, and Future Trends November...

426

Space nuclear power and man's extraterrestrial civilization  

SciTech Connect (OSTI)

This paper examines leading space nuclear power technology candidates. Particular emphasis is given the heat-pipe reactor technology currently under development at the Los Alamos National Laboratory. This program is aimed at developing a 10-100 kWe, 7-year lifetime space nuclear power plant. As the demand for space-based power reaches megawatt levels, other nuclear reactor designs including: solid core, fluidized bed, and gaseous core, are considered.

Angelo, J.J.; Buden, D.

1983-01-01T23:59:59.000Z

427

History of wireless power transmission  

SciTech Connect (OSTI)

The history of wireless power transmission at microwave frequencies is reviewed with emphasis upon the time period starting with the post World War II efforts to use the new microwave technology developed during the war. A nationally televised demonstration of a microwave powered helicopter at the Spencer Laboratory of the Raytheon Co., in 1964 was the result of these early efforts and broadly introduced the concept of wireless power transmission to scientific and engineering communities and to the public. Subsequent development efforts centered on improving the efficiency of the interconversion of d.c. and microwave power at the ends of the system to reach a demonstrated overall d.c. to d.c. system efficiency of 54% in 1974. The response to the requirements of applications such as the Solar Power Satellite and high altitude microwave powered aircraft have changed the direction of technology development and greatly expanded the technology base. Recent and current efforts are centered on examining the use of higher frequencies than the baseline 2.45 GHz, and in reducing the system costs at 2.45 GHz. 26 refs., 14 figs.

Brown, W.C. [Microwave Power Transmission Systems, Weston, MA (United States)] [Microwave Power Transmission Systems, Weston, MA (United States)

1996-12-31T23:59:59.000Z

428

Predictive models for power dissipation in optical transceivers  

E-Print Network [OSTI]

Power dissipation in optical networks is a significant problem for the telecommunications industry. The optical transceiver was selected as a representative device of the network, and a component based power model is ...

Butler, Katherine, 1981-

2004-01-01T23:59:59.000Z

429

Innovative fuel designs for high power density pressurized water reactor  

E-Print Network [OSTI]

One of the ways to lower the cost of nuclear energy is to increase the power density of the reactor core. Features of fuel design that enhance the potential for high power density are derived based on characteristics of ...

Feng, Dandong, Ph. D. Massachusetts Institute of Technology

2006-01-01T23:59:59.000Z

430

Hydrogen storage of energy for small power supply systems  

E-Print Network [OSTI]

Power supply systems for cell phone base stations using hydrogen energy storage, fuel cells or hydrogen-burning generators, and a backup generator could offer an improvement over current power supply systems. Two categories ...

Monaghan, Rory F. D. (Rory Francis Desmond)

2005-01-01T23:59:59.000Z

431

Power network analysis and optimization  

E-Print Network [OSTI]

hierarchical power distribution design with a power tree [T. Roy, “Power distribution system design methodology andChen, “3D Power Distribution Network Co-design for Nanascale

Zhang, Wanping

2009-01-01T23:59:59.000Z

432

2004 Power Marketing Plan - Base Resource Overview  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLasDelivered‰PNGExperience hands-on halloweenReliable7O(α, X)CJune

433

Space-based solar power system architecture .  

E-Print Network [OSTI]

??Fossil fuels are, by their very nature, finite resources. There are, however, numerous renewable energy sources that should be taken advantage of. One of the… (more)

Busch, Brian C.

2012-01-01T23:59:59.000Z

434

Power Series Introduction  

E-Print Network [OSTI]

Power Series 16.4 Introduction In this section we consider power series. These are examples of infinite series where each term contains a variable, x, raised to a positive integer power. We use the ratio test to obtain the radius of convergence R, of the power series and state the important result

Vickers, James

435

Electronic and photonic power applications  

SciTech Connect (OSTI)

Efficient conversion of radioactive decay to electrical power has been the goal of a number of past research efforts. One of these was the Elgin-Kidde nuclear battery. In this concept promethium-147 was used as a beta source which was then mixed with a phosphor to produce a radioluminescent (RL) source of light. The light source was coupled to silicon photovoltaic converters to create electricity. This photoelectric approach is being revisited using tritium based solid state compounds and advanced gas concepts to produce RL light sources being disclosed at this conference. Efficient conversion of the RL light energy to electrical energy imposes certain requirements on the semiconductor converter. These requirements will be discussed. Projections of power source electrical and physical characteristics will be presented based on reasonable design parameter assumptions. The words Power Supply'' usually evoke a vision of a rotating machine or chemical battery. However, today's technology is making increasing use of photonics, where information and even power can be moved through optical fibers. Brighter volumetric RL light sources open a whole new range of photonics-based applications, while solid state tritiated compounds provide the foundation for improved mechanical adaptability and safety. 4 refs., 6 figs., 1 tab.

Walko, R.J.; Ashley, C.S.; Brinker, C.J.; Reed, S.T.; Renschler, C.L. (Sandia National Labs., Albuquerque, NM (USA)); Shepodd, T.J. (Sandia National Labs., Livermore, CA (USA)); Ellefson, R.E.; Gill, J.T. (EG and G Mound Applied Technologies, Miamisburg, OH (USA)); Leonard, L.E. (USDOE, Washington, DC (USA))

1990-01-01T23:59:59.000Z

436

Industrial Interruptible Power: An Economical Alternative  

E-Print Network [OSTI]

Prevailing utility cost forecasts project that long-term energy costs will rise in real terms. With the addition of capacity construction costs into electric utility rate bases, electric power costs for some utilities will rise sharply...

Reynolds, S. D.; Gardner, J. R.

1984-01-01T23:59:59.000Z

437

BONNEVILLE POWER ADMINISTRATION FOR IMMEDIATE RELEASE  

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

for tips about multiple incidents of insulators damaged by firearms on its high- voltage power line near Joint Base Lewis-McChord in Tacoma, Wash. Damaged insulators can put...

438

Ultralow-Power Electronics for Cardiac Monitoring  

E-Print Network [OSTI]

Ultralow-power electronics for cardiac monitoring make possible the development of new light-weight and low-cost devices that are ideal for long-term medical measurements and home-based tele-monitoring services. Nowadays, ...

Turicchia, Lorenzo

439

Dispersed power and renewables  

SciTech Connect (OSTI)

Distributed power generation and renewable energy sources are discussed: The following topics are discussed: distributed resources, distributed generation, commercialization requirements, biomass power, location of existing biomass feedstocks, biomass business plan components, North Carolina BGCC partnership, New York biomass co-firing project, alfalfa for power and feed, Hawaii Pioneer Mill LOI project, next steps for biomass, wind power activity, photovoltaic modules and arrays, lead-acid batteries, superconducting magnetic energy storage, fuel cells, and electric power industry trends.

O`Sullivan, J.B.

1995-12-31T23:59:59.000Z

440

The inspection of power purchase contracts at the Western Area Power Administration  

SciTech Connect (OSTI)

The Office of Inspector General received an allegation regarding possible irregularities in certain power purchase contracts awarded by the Western Area Power Administration (WAPA). Based on our survey of WAPA`s power purchase procedures, we expanded our allegation based inquiry to include several management issues. Thus, the purpose of this inspection was to review the specific allegation as well as to evaluate WAPA`s power purchase contracting procedures relating to competition, the documentation of the solicitation, negotiation, and award processes, and the determination of the reasonableness of the rates negotiated by WAPA.

NONE

1995-05-01T23:59:59.000Z

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


441

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

E-Print Network [OSTI]

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

Vasquez, Juan Carlos

442

Active Power Control from Wind Power (Presentation)  

SciTech Connect (OSTI)

In order to keep the electricity grid stable and the lights on, the power system relies on certain responses from its generating fleet. This presentation evaluates the potential for wind turbines and wind power plants to provide these services and assist the grid during critical times.

Ela, E.; Brooks, D.

2011-04-01T23:59:59.000Z

443

High power fast ramping power supplies  

SciTech Connect (OSTI)

Hundred megawatt level fast ramping power converters to drive proton and heavy ion machines are under research and development at accelerator facilities in the world. This is a leading edge technology. There are several topologies to achieve this power level. Their advantages and related issues will be discussed.

Marneris,I.; Bajon, E.; Bonati, R.; Sandberg, J.; Roser, T.; Tsoupas, N.

2009-05-04T23:59:59.000Z

444

Lunar Wireless Power Transfer Feasibility Study  

SciTech Connect (OSTI)

This study examines the feasibility of a multi-kilowatt wireless radio frequency (RF) power system to transfer power between lunar base facilities. Initial analyses, show that wireless power transfer (WPT) systems can be more efficient and less expensive than traditional wired approaches for certain lunar and terrestrial applications. The study includes evaluations of the fundamental limitations of lunar WPT systems, the interrelationships of possible operational parameters, and a baseline design approach for a notionial system that could be used in the near future to power remote facilities at a lunar base. Our notional system includes state-of-the-art photovoltaics (PVs), high-efficiency microwave transmitters, low-mass large-aperture high-power transmit antennas, high-efficiency large-area rectenna receiving arrays, and reconfigurable DC combining circuitry.

Sheldon Freid, et al.

2008-06-01T23:59:59.000Z

445

Bulk Power System Dynamics and Control VIII, August 1-6, 2010, Buzios, Rio de Janeiro, Brazil Impact of Delays on a Consensus-based Primary Frequency Control Scheme  

E-Print Network [OSTI]

by a Multi-Terminal HVDC Grid Jing Dai, Yannick Phulpin Sup´elec, France {jing.dai, yannick systems connected by a multi-terminal HVDC grid. We focus on a control scheme that mod- ifies the power current (HVDC) systems for bulk power transmission over long distances [3] and underground cable cross

Paris-Sud XI, Université de

446

Clean Power Plan: Reducing Carbon Pollution From Existing Power Plants  

E-Print Network [OSTI]

Efficiency Improvements Efficiency improvements Co-firing or switching to natural gas Coal retirements Retrofit CCS (e.g.,WA Parish in Texas) 2. Use lower-emitting power sources more Dispatch changes to existing natural gas combined cycle (CC) Dispatch... that are high emitting. • Energy conservation programs. • Retrofitting units with partial CCS. • Use of certain biomass. • Efficiency improvements at higher- emitting plants.* • Market-based trading programs. • Building new renewables. • Dispatch changes. • Co...

Bremer,K.

2014-01-01T23:59:59.000Z

447

Combustion Exhaust Gas Heat to Power usingThermoelectric Engines...  

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

Solutions Combustion Exhaust Gas Heat to Power using Thermoelectric Engines John LaGrandeur October 5, 2011 Advanced Thermoelectric Solutions - 1 - Market motivation based on CO 2...

448

Optimization Online - Robustified Reserve Modelling for Wind Power ...  

E-Print Network [OSTI]

Jul 8, 2014 ... Robustified Reserve Modelling for Wind Power Integration in Ramp-Based Unit Commitment. German Morales-Espańa(gmorales ***at*** ...

German Morales-Espańa

2014-07-08T23:59:59.000Z

449

Simplified Methodology for Designing Parabolic Trough Solar Power Plants.  

E-Print Network [OSTI]

?? The performance of parabolic trough based solar power plants over the last 25 years has proven that this technology is an excellent alternative for… (more)

Vasquez Padilla, Ricardo

2011-01-01T23:59:59.000Z

450

Simplified Methodology for Designing Parabolic Trough Solar Power Plants.  

E-Print Network [OSTI]

??The performance of parabolic trough based solar power plants over the last 25 years has proven that this technology is an excellent alternative for the… (more)

Vasquez Padilla, Ricardo

2011-01-01T23:59:59.000Z

451

ELECTROCHEMICAL POWER FOR TRANSPORTATION  

E-Print Network [OSTI]

that is powered by an electric motor which is driven byPower module Reactor Electric motor Toyota EVlH electricdesign package including an electric motor and associated

Cairns, Elton J.

2012-01-01T23:59:59.000Z

452

Power Factor Improvement  

E-Print Network [OSTI]

Power factor control is a necessary ingredient in any successful Energy Management Program. Many companies are operating with power factors of 70% or less and are being penalized through the electrical utility bill. This paper starts by describing...

Viljoen, T. A.

1979-01-01T23:59:59.000Z

453

Residential Wind Power  

E-Print Network [OSTI]

This research study will explore the use of residential wind power and associated engineering and environmental issues. There is various wind power generating devices available to the consumer. The study will discuss the dependencies of human...

Willis, Gary

2011-12-16T23:59:59.000Z

454

Space Solar Power Program  

SciTech Connect (OSTI)

Information pertaining to the Space Solar Power Program is presented on energy analysis; markets; overall development plan; organizational plan; environmental and safety issues; power systems; space transportation; space manufacturing, construction, operations; design examples; and finance.

Arif, H.; Barbosa, H.; Bardet, C.; Baroud, M.; Behar, A.; Berrier, K.; Berthe, P.; Bertrand, R.; Bibyk, I.; Bisson, J.; Bloch, L.; Bobadilla, G.; Bourque, D.; Bush, L.; Carandang, R.; Chiku, T.; Crosby, N.; De Seixas, M.; De Vries, J.; Doll, S.; Dufour, F.; Eckart, P.; Fahey, M.; Fenot, F.; Foeckersperger, S.; Fontaine, J.E.; Fowler, R.; Frey, H.; Fujio, H.; Gasa, J.M.; Gleave, J.; Godoe, J.; Green, I.; Haeberli, R.; Hanada, T.; Ha

1992-08-01T23:59:59.000Z

455

Idaho Power- Net Metering  

Broader source: Energy.gov [DOE]

Idaho does not have a statewide net-metering policy. However, each of the state's three investor-owned utilities -- Avista Utilities, Idaho Power and Rocky Mountain Power -- has developed a net...

456

Power production and ADS  

SciTech Connect (OSTI)

We describe the power production process in Accelerator Driven Sub-critical systems employing Thorium-232 and Uranium-238 as fuel and examine the demands on the power of the accelerator required.

Raja, Rajendran; /Fermilab

2010-03-01T23:59:59.000Z

457

Body powered thermoelectric systems  

E-Print Network [OSTI]

Great interest exists for and progress has be made in the effective utilization of the human body as a possible power supply in hopes of powering such applications as sensors and continuously monitoring medical devices ...

Settaluri, Krishna Tej

2012-01-01T23:59:59.000Z

458

Soldier power. Battery charging.  

E-Print Network [OSTI]

hours runtime at full load 50 W #12; (%) (kW) 300 1-5 Siemens-Power 30 (hr) 10,000 Siemens 300 Acumentrics 80 (mW/cm2) 600 400 Siemens-Power 85 (hr) 70,000 3,000 Siemens-Power 15 () 500 25 Siemens-Power 60 >2013 - , Bloom, MHI, Rolls Royce 6 #12; SOFCSOFC * (LSCF ) ( Ag

Hong, Deog Ki

459

ELECTROCHEMICAL POWER FOR TRANSPORTATION  

E-Print Network [OSTI]

resistant material for contact with s Low-cost seals Low-cost electrolyte Specific power is low Thermal

Cairns, Elton J.

2012-01-01T23:59:59.000Z

460

Concentrating Solar Power  

SciTech Connect (OSTI)

Summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its concentrating solar power subprogram.

Not Available

2008-09-01T23:59:59.000Z

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


461

Limiting the Power Consumption of Main Memory Bruno Diniz, Dorgival Guedes,  

E-Print Network [OSTI]

their power supply, packaging, and cooling requirements. When the peak power consumption is high, the hardware- than-peak power budget, based on which power supply, packaging, and cooling infrastructures can be more, the power supply, packag- ing, and cooling infrastructures of these components and systems are becoming

Bianchini, Ricardo

462

SMART POWER TURBINE  

SciTech Connect (OSTI)

Gas turbines are the choice technology for high-performance power generation and are employed in both simple and combined cycle configurations around the world. The Smart Power Turbine (SPT) program has developed new technologies that are needed to further extend the performance and economic attractiveness of gas turbines for power generation. Today's power generation gas turbines control firing temperatures indirectly, by measuring the exhaust gas temperature and then mathematically calculating the peak combustor temperatures. But temperatures in the turbine hot gas path vary a great deal, making it difficult to control firing temperatures precisely enough to achieve optimal performance. Similarly, there is no current way to assess deterioration of turbine hot-gas-path components without shutting down the turbine. Consequently, maintenance and component replacements are often scheduled according to conservative design practices based on historical fleet-averaged data. Since fuel heating values vary with the prevalent natural gas fuel, the inability to measure heating value directly, with sufficient accuracy and timeliness, can lead to maintenance and operational decisions that are less than optimal. GE Global Research Center, under this Smart Power Turbine program, has developed a suite of novel sensors that would measure combustor flame temperature, online fuel lower heating value (LHV), and hot-gas-path component life directly. The feasibility of using the ratio of the integrated intensities of portions of the OH emission band to determine the specific average temperature of a premixed methane or natural-gas-fueled combustion flame was demonstrated. The temperature determined is the temperature of the plasma included in the field of view of the sensor. Two sensor types were investigated: the first used a low-resolution fiber optic spectrometer; the second was a SiC dual photodiode chip. Both methods worked. Sensitivity to flame temperature changes was remarkably high, that is a 1-2.5% change in ratio for an 11.1 C (20 F) change in temperature at flame temperatures between 1482.2 C (2700 F) and 1760 C (3200 F). Sensor ratio calibration was performed using flame temperatures determined by calculations using the amount of unburned oxygen in the exhaust and by the fuel/air ratio of the combustible gas mixture. The agreement between the results of these two methods was excellent. The sensor methods characterized are simple and viable. Experiments are underway to validate the GE Flame Temperature Sensor as a practical tool for use with multiburner gas turbine combustors. The lower heating value (LHV) Fuel Quality Sensor consists of a catalytic film deposited on the surface of a microhotplate. This micromachined design has low heat capacity and thermal conductivity, making it ideal for heating catalysts placed on its surface. Several methods of catalyst deposition were investigated, including micropen deposition and other proprietary methods, which permit precise and repeatable placement of the materials. The use of catalysts on the LHV sensor expands the limits of flammability (LoF) of combustion fuels as compared with conventional flames; an unoptimized LoF of 1-32% for natural gas (NG) in air was demonstrated with the microcombustor, whereas conventionally 4 to 16% is observed. The primary goal of this work was to measure the LHV of NG fuels. The secondary goal was to determine the relative quantities of the various components of NG mixes. This determination was made successfully by using an array of different catalysts operating at different temperatures. The combustion parameters for methane were shown to be dependent on whether Pt or Pd catalysts were used. In this project, significant effort was expended on making the LHV platform more robust by the addition of high-temperature stable materials, such as tantalum, and the use of passivation overcoats to protect the resistive heater/sensor materials from degradation in the combustion environment. Modeling and simulation were used to predict improved sensor designs.

Nirm V. Nirmalan

2003-11-01T23:59:59.000Z

463

Green Power Inverter Prvningsrapport  

E-Print Network [OSTI]

Green Power Inverter Prøvningsrapport SolenergiCentret Søren Poulsen Ivan Katic Oktober 2004 #12;Green Power Inverter målerapport.doc SolenergiCentret - 04-03-2005 2 Forord Nærværende rapport indeholder Teknologisk Instituts bidrag til målinger i forbindelse med PSO projektet "Green Power Inverter

464

Power Plant Cycling Costs  

SciTech Connect (OSTI)

This report provides a detailed review of the most up to date data available on power plant cycling costs. The primary objective of this report is to increase awareness of power plant cycling cost, the use of these costs in renewable integration studies and to stimulate debate between policymakers, system dispatchers, plant personnel and power utilities.

Kumar, N.; Besuner, P.; Lefton, S.; Agan, D.; Hilleman, D.

2012-07-01T23:59:59.000Z

465

Power/Privilege Definitions  

E-Print Network [OSTI]

Major; People's Institute for Survival and Beyond, New Orleans 2. Power is the ability to define reality and to convince other people that it is their definition. ~ Dr. Wade Nobles 3. Power is the capacity to act. 4 different cultures. [JL] RACISM Racism is race prejudice plus power [See Racist]. People's Institute calls

Sheridan, Jennifer

466

Power Dancers Audition Packet  

E-Print Network [OSTI]

Power Dancers Dance Team Audition Packet September 8-10, 2014 #12;Power Dancers Dance Team Dear service to their school with the support of the faculty, administration, and other groups on campus, but they also provide a source of great school spirit to UT Dallas. Power Dancers provides a real opportunity

O'Toole, Alice J.

467

Power Dancers Audition Packet  

E-Print Network [OSTI]

Power Dancers Dance Team Audition Packet September 9-11, 2013 #12;Power Dancers Dance Team Dear service to their school with the support of the faculty, administration, and other groups on campus, but they also provide a source of great school spirit to UT Dallas. Power Dancers provides a real opportunity

O'Toole, Alice J.

468

Power Dancers Audition Packet  

E-Print Network [OSTI]

Power Dancers Dance Team Audition Packet September 10 & 12, 2012 #12;Power Dancers Dance Team Dear service to their school with the support of the faculty, administration, and other groups on campus, but they also provide a source of great school spirit to UT Dallas. Power Dancers provides a real opportunity

O'Toole, Alice J.

469

A Hierarchical Control Algorithm for Managing Electrical Energy Storage Systems in Homes Equipped with PV Power Generation  

E-Print Network [OSTI]

use their PV-based generation and controllable storage devices for peak shaving on their power demand controller should possess the ability of forecasting future PV-based power generation and load power consumption profiles for better performance. In this paper we present novel PV power generation and load power

Pedram, Massoud

470

How Power is Lost: Illusions of Alliance Among the Powerful  

E-Print Network [OSTI]

while most accounts of power loss focus on ethical breachesPower Loss .1. Proposed Model of Power Loss Figure 2. Social Monitoring

Brion, Sebastien

2010-01-01T23:59:59.000Z

471

Energy Storage & Power Electronics 2008 Peer Review - Power Electronic...  

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

Power Electronics (PE) Systems Presentations Energy Storage & Power Electronics 2008 Peer Review - Power Electronics (PE) Systems Presentations The 2008 Peer Review Meeting for the...

472

Karnataka Power Corporation Limited and National Thermal Power...  

Open Energy Info (EERE)

Limited and National Thermal Power Corporation JV Jump to: navigation, search Name: Karnataka Power Corporation Limited and National Thermal Power Corporation JV Place: India...

473

Aggressive Test Power Reduction Through Test Stimuli Transformation  

E-Print Network [OSTI]

. Based on this analysis, we develop algorithms for transforming a set of test vectors into power- optimal that are capable of identifying the transformation that is optimal in terms of power and implementing it at minimalAggressive Test Power Reduction Through Test Stimuli Transformation ÂŁ Ozgur Sinanoglu and Alex

Orailoglu, Alex

474

Potential of Mirror Systems as Future Fusion Power Reactors  

SciTech Connect (OSTI)

Mirror based fusion reactors - as other fusion reactor concepts - have considerable environmental and safety advantages. They could make available energy resources for many 1000 years. Mirror type fusion reactors have additional technical advantages over other fusion reactor concepts. These are: simple design topology, steady state power generation, decoupling of end plugs from central power producing regions, small power units as demonstration facilities.

Kessler, Guenter; Kulcinski, Gerald L. [University of Madison (United States)

2005-01-15T23:59:59.000Z

475

System-Wide Emissions Implications of Increased Wind Power Penetration  

E-Print Network [OSTI]

and ramifications of wind power providing 20% of U.S. electricity by 2030.1 Wind energy is advantageous becauseSystem-Wide Emissions Implications of Increased Wind Power Penetration Lauren Valentino,, Viviana of incorporating wind energy into the electric power system. We present a detailed emissions analysis based

Kemner, Ken

476

A Realistic Power Consumption Model for Wireless Sensor Network Devices  

E-Print Network [OSTI]

. Recent analyses of WSN energy efficiency have been widely based on a sensor node power consumption model1 A Realistic Power Consumption Model for Wireless Sensor Network Devices Qin Wang, Mark Hempstead}@eecs.harvard.edu Abstract-- A realistic power consumption model of wireless communication subsystems typically used in many

Hempstead, Mark

477

Advanced PID type fuzzy logic power system stabilizer  

SciTech Connect (OSTI)

An advanced fuzzy logic control scheme has been proposed for a micro-computer based power system stabilizer to enhance the overall stability of power systems. The proposed control scheme utilizes the PID information of the generator speed. The input signal to the stabilizer is the real power output of a study unit. Simulations show the effectiveness of the advanced fuzzy logic control scheme.

Hiyama, Takashi; Kugimiya, Masahiko; Satoh, Hironori (Kumamoto Univ. (Japan). Dept. of Electrical Engineering and Computer Science)

1994-09-01T23:59:59.000Z

478

Fine-Grained Power Management Using Process-level Profiling  

E-Print Network [OSTI]

. To evaluate energy efficiency, the Green Grid group proposed the definition of power usage effectiveness (PUE between performance and energy consumption, fine-grained methods, such as process- level power management-aware decisions based on these information. In addition, we introduce a power-aware system module called Energy

Shi, Weisong

479

Energy Efficient Scheduling with Power Control for Wireless Networks  

E-Print Network [OSTI]

Energy Efficient Scheduling with Power Control for Wireless Networks Bastian Katz Institute the complexity of scheduling with power control in the SINRG model of interference. Based on a novel scheme) and less energy consumption: power control admits schedules that would otherwise violate interference

Paris-Sud XI, Université de

480

Multimode power processor  

DOE Patents [OSTI]

In one embodiment, a power processor which operates in three modes: an inverter mode wherein power is delivered from a battery to an AC power grid or load; a battery charger mode wherein the battery is charged by a generator; and a parallel mode wherein the generator supplies power to the AC power grid or load in parallel with the battery. In the parallel mode, the system adapts to arbitrary non-linear loads. The power processor may operate on a per-phase basis wherein the load may be synthetically transferred from one phase to another by way of a bumpless transfer which causes no interruption of power to the load when transferring energy sources. Voltage transients and frequency transients delivered to the load when switching between the generator and battery sources are minimized, thereby providing an uninterruptible power supply. The power processor may be used as part of a hybrid electrical power source system which may contain, in one embodiment, a photovoltaic array, diesel engine, and battery power sources.

O'Sullivan, George A. (Pottersville, NJ); O'Sullivan, Joseph A. (St. Louis, MO)

1999-01-01T23:59:59.000Z

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


481

Multimode power processor  

DOE Patents [OSTI]

In one embodiment, a power processor which operates in three modes: an inverter mode wherein power is delivered from a battery to an AC power grid or load; a battery charger mode wherein the battery is charged by a generator; and a parallel mode wherein the generator supplies power to the AC power grid or load in parallel with the battery. In the parallel mode, the system adapts to arbitrary non-linear loads. The power processor may operate on a per-phase basis wherein the load may be synthetically transferred from one phase to another by way of a bumpless transfer which causes no interruption of power to the load when transferring energy sources. Voltage transients and frequency transients delivered to the load when switching between the generator and battery sources are minimized, thereby providing an uninterruptible power supply. The power processor may be used as part of a hybrid electrical power source system which may contain, in one embodiment, a photovoltaic array, diesel engine, and battery power sources. 31 figs.

O'Sullivan, G.A.; O'Sullivan, J.A.

1999-07-27T23:59:59.000Z

482

IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 26, NO. 4, NOVEMBER 2011 2197 Reserve Requirements for Wind Power Integration: A  

E-Print Network [OSTI]

for Wind Power Integration: A Scenario-Based Stochastic Programming Framework Anthony Papavasiliou, Student-stage stochastic programming model for committing reserves in systems with large amounts of wind power. We describe wind power generation in terms of a representative set of appropriately weighted scenarios, and we

Oren, Shmuel S.

483

Power Flow Controller for Renewables: Transformer-less Unified Power Flow Controller for Wind and Solar Power Transmission  

SciTech Connect (OSTI)

GENI Project: MSU is developing a power flow controller to improve the routing of electricity from renewable sources through existing power lines. The fast, innovative, and lightweight circuitry that MSU is incorporating into its controller will eliminate the need for a separate heavy and expensive transformer, as well as the construction of new transmission lines. MSU’s controller is better suited to control power flows from distributed and intermittent wind and solar power systems than traditional transformer-based controllers are, so it will help to integrate more renewable energy into the grid. MSU‘s power flow controller can be installed anywhere in the existing grid to optimize energy transmission and help reduce transmission congestion.

None

2012-02-08T23:59:59.000Z

484

EA-1726: Kahuku Wind Power, LLC Wind Power Generation Facility...  

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

6: Kahuku Wind Power, LLC Wind Power Generation Facility, O'ahu, HI EA-1726: Kahuku Wind Power, LLC Wind Power Generation Facility, O'ahu, HI May 3, 2010 EA-1726: Final...

485

Power Quality Aspects in a Wind Power Plant: Preprint  

SciTech Connect (OSTI)

Although many operational aspects affect wind power plant operation, this paper focuses on power quality. Because a wind power plant is connected to the grid, it is very important to understand the sources of disturbances that affect the power quality.

Muljadi, E.; Butterfield, C. P.; Chacon, J.; Romanowitz, H.

2006-01-01T23:59:59.000Z

486

Power Sales to Electric Utilities  

SciTech Connect (OSTI)

The Public Utilities Regulatory Policies Act (PURPA) of 1979 requires that electrical utilities interconnect with qualifying facilities and purchase electricity at a rate based upon their full avoided costs (i.e., costs of providing both capacity and energy). Qualifying facilities (QF) include solar or geothermal electric units, hydropower, municipal solid waste or biomass-fired power plants, and cogeneration projects that satisfy maximum size, fuel use, ownership, location, and/or efficiency criteria. In Washington State, neither standard power purchase prices based upon a proxy ''avoided plant'', standard contracts, or a standard offer process have been used. Instead, a variety of power purchase contracts have been negotiated by developers of qualifying facilities with investor-owned utilities, public utility districts, and municipally-owned and operated utilities. With a hydro-based system, benefits associated with resource acquisition are determined in large part by how compatible the resource is with a utility's existing generation mix. Power purchase rates are negotiated and vary according to firm energy production, guarantees, ability to schedule maintenance or downtime, rights of refusal, power plant purchase options, project start date and length of contract; front-loading or levelization provisions; and the ability of the project to provide ''demonstrated'' capacity. Legislation was also enacted which allows PURPA to work effectively. Initial laws established ownership rights and provided irrigation districts, PUDs, and municipalities with expanded enabling powers. Financial processes were streamlined and, in some cases, simplified. Finally, laws were passed which are designed to ensure that development proceeds in an environmentally acceptable manner. In retrospect, PURPA has worked well within Washington. In the state of Washington, 20 small-scale hydroelectric projects with a combined generating capacity of 77 MW, 3 solid waste-to-energy facilities with 55 MW of electrical output, 4 cogeneration projects with 34.5 MW of generating capability, and 4 wastewater treatment facility digester gas-to-energy projects with 5 MW of electrical production have come on-line (or are in the final stages of construction) since the passage of PURPA. These numbers represent only a small portion of Washington's untapped and underutilized cogeneration and renewable resource generating potentials. [DJE-2005

None

1989-02-01T23:59:59.000Z

487

State power plant productivity programs  

SciTech Connect (OSTI)

The findings of a working group formed to review the status of efforts by utilities and utility regulators to increase the availability and reliability of generating units are presented. Representatives from nine state regulatory agencies, NRRI, and DOE, participated on the Working Group. The Federal government has been working cooperatively with utilities, utility organizations, and with regulators to encourage and facilitate improvements in power plant productivity. Cooperative projects undertaken with regulatory and energy commissions in California, Illinois, New York, Ohio, Texas, North Carolina and Mighigan are described. Following initiation of these cooperative projects, DOE funded a survey to determine which states were explicitly addressing power plant productivity through the regulatory process. The Working Group was formed following completion of this survey. The Working Group emphasized the need for those power plant productivity improvements which are cost effective. The cost effectiveness of proposed availability improvement projects should be determined within the context of opportunities for operating and capital improvements available to an entire utility. The Working Group also identified the need for: allowing for plant designs that have a higher construction cost, but are also more reliable; allowing for recovery and reducing recovery lags for productivity-related capital expenditures; identifying and reducing disincentives in the regulatory process; ascertaining that utilities have sufficient money available to undertake timely maintenance; and support of EPRI and NERC to develop a relevant and accurate national data base. The DOE views these as extremely important aspects of any regulatory program to improve power plant productivity.

Not Available

1981-02-01T23:59:59.000Z

488

Streamlining the Certification Process for New Power Plants in Texas  

E-Print Network [OSTI]

resource alternatives and sets up barriers to others. There is general agreement that the financial incentives differ for traditional power plant investments, purchased power, small power production, and demand-side management. The current debate... to construct 1,200 megawatts of base-load capacity to replaced purchased power. Coal and lignite fuel options were proposed in two plant sizes: three 400-megawatt units or two 600-megawatt units. A hearing was set to begin in March 1985. TNP witnesses...

Treadway, N.

489

Georgia Interfaith Power and Light- Energy Improvement Grants (Georgia)  

Broader source: Energy.gov [DOE]

Georgia Interfaith Power and Light (GIPL) offers grants of up to $10,000 to congregations or faith-based communities, including faith-based schools. Grant funds may be used for energy conservation...

490

Carbon nano-relays for low power switching  

E-Print Network [OSTI]

In this thesis two unique carbon based nanoelectromechanical switches or carbon nano-relays are demonstrated as a toolkit for investigating NEMs based low power switching. The first is a vertical carbon nano-relay, consisting ...

Milaninia, Kaveh Mehdi

2009-01-01T23:59:59.000Z

491

Southeastern Power Administration | Department of Energy  

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

Southeastern Power Administration Southeastern Power Administration Southeastern Power Administration View All Maps Addthis...

492

Alternative Energy Technologies Solar Power  

E-Print Network [OSTI]

#12;Alternative Energy Technologies Solar Power Photovoltaics Concentrating Solar Power (CSP) Power;Concentrating Solar Power (CSP) Reflector material is Aluminum or Silver Tube material ..... Several possible ............... Mexico, Canada, Peru Alumina ............Guinea, Brazil, Australia, Jamaica Manganese ....... S. Africa

Scott, Christopher

493

Peak power ratio generator  

DOE Patents [OSTI]

A peak power ratio generator is described for measuring, in combination with a conventional power meter, the peak power level of extremely narrow pulses in the gigahertz radio frequency bands. The present invention in a preferred embodiment utilizes a tunnel diode and a back diode combination in a detector circuit as the only high speed elements. The high speed tunnel diode provides a bistable signal and serves as a memory device of the input pulses for the remaining, slower components. A hybrid digital and analog loop maintains the peak power level of a reference channel at a known amount. Thus, by measuring the average power levels of the reference signal and the source signal, the peak power level of the source signal can be determined.

Moyer, Robert D. (Albuquerque, NM)

1985-01-01T23:59:59.000Z

494

Entangling Power of Permutations  

E-Print Network [OSTI]

The notion of entangling power of unitary matrices was introduced by Zanardi, Zalka and Faoro [PRA, 62, 030301]. We study the entangling power of permutations, given in terms of a combinatorial formula. We show that the permutation matrices with zero entangling power are, up to local unitaries, the identity and the swap. We construct the permutations with the minimum nonzero entangling power for every dimension. With the use of orthogonal latin squares, we construct the permutations with the maximum entangling power for every dimension. Moreover, we show that the value obtained is maximum over all unitaries of the same dimension, with possible exception for 36. Our result enables us to construct generic examples of 4-qudits maximally entangled states for all dimensions except for 2 and 6. We numerically classify, according to their entangling power, the permutation matrices of dimension 4 and 9, and we give some estimates for higher dimensions.

Lieven Clarisse; Sibasish Ghosh; Simone Severini; Anthony Sudbery

2005-04-11T23:59:59.000Z

495

High Flux Isotope Reactor power upgrade status  

SciTech Connect (OSTI)

A return to 100-MW operation is being planned for the High Flux Isotope Reactor (HFIR). Recent improvements in fuel element manufacturing procedures and inspection equipment will be exploited to reduce hot spot and hot streak factors sufficiently to permit the power upgrade without an increase in primary coolant pressure. Fresh fuel elements already fabricated for future use are being evaluated individually for power upgrade potential based on their measured coolant channel dimensions.

Rothrock, R.B.; Hale, R.E. [Oak Ridge National Lab., TN (United States); Cheverton, R.D. [Delta-21 Resources Inc., Oak Ridge, TN (United States)

1997-03-01T23:59:59.000Z

496

Photovoltaic solar system connected to the electric power grid operating as active power generator and reactive power compensator  

SciTech Connect (OSTI)

In the case of photovoltaic (PV) systems acting as distributed generation (DG) systems, the DC energy that is produced is fed to the grid through the power-conditioning unit (inverter). The majority of contemporary inverters used in DG systems are current source inverters (CSI) operating at unity power factor. If, however, we assume that voltage source inverters (VSI) can replace CSIs, we can generate reactive power proportionally to the remaining unused capacity at any given time. According to the theory of instantaneous power, the inverter reactive power can be regulated by changing the amplitude of its output voltage. In addition, the inverter active power can be adjusted by modifying the phase angle of its output voltage. Based on such theory, both the active power supply and the reactive power compensation (RPC) can be carried out simultaneously. When the insolation is weak or the PV modules are inoperative at night, the RPC feature of a PV system can still be used to improve the inverter utilisation factor. Some MATLAB simulation results are included here to show the feasibility of the method. (author)

Albuquerque, Fabio L.; Moraes, Adelio J.; Guimaraes, Geraldo C.; Sanhueza, Sergio M.R.; Vaz, Alexandre R. [Universidade Federal de Uberlandia, Uberlandia-MG, CEP 38400-902 (Brazil)

2010-07-15T23:59:59.000Z

497

Power spectrum of the fluctuation of Chebyshev's prime counting function  

E-Print Network [OSTI]

The one-sided power spectrum of the fluctuation of Chebyshev's weighted prime counting function is numerically estimated based on samples of the fluctuating function of different sizes. The power spectrum is also estimated analytically for large frequency based on Riemann hypothesis and the exact formula for the fluctuating function in terms of all the non-trivial Riemann zeroes. Our analytical estimate is consistent with our numerical estimate of a 1/f^2 power spectrum.

Boon Leong Lan; Shaohen Yong

2005-06-20T23:59:59.000Z

498

Power transaction issues in deregulated power systems  

E-Print Network [OSTI]

numbers Slack Bus IVI, 0 P;, Q; Gen. Bus Q 0 2, 3, 4, . . . , l+NPV Load Bus Pu Qi 2+NPV, 3+NPV, . . . , N Using the Kirchhoff's current law at a given node, the real and reactive power balance equations are written at each bus of the system: n P... ~ 822 821 827 9!, '7 Fig. 4. IEEE 30 bus system. 11 Figure 5 shows the bus dialog box for bus 13, where a 10MW increase in real power generation is entered. 1 IOIOOO 1QOtKMCO QOQINIO QOXCOO O'I OOXI -0 DDDOCO tg. . us ata. Step 1. Let us...

Roycourt, Henrik

2000-01-01T23:59:59.000Z

499

GROWTH OFGROWTH OFGROWTH OFGROWTH OF BACTERIABACTERIABACTERIABACTERIA CONSORTIUMCONSORTIUMCONSORTIUMCONSORTIUM ONONONON NANO-NANO-NANO-NANO-CARBON ELECTRODECARBON ELECTRODECARBON ELECTRODECARBON ELECTRODE FOR POWER GENERATIONFOR POWER GENERATIONFOR POWER  

E-Print Network [OSTI]

(CNTs) supported carbon fiber electrode has outstanding electronchemical properties in fuel cell application and generating power METHODS -Preparation of CNTs based carbon fiber-Preparation of CNTs based carbon fiber-Preparation of CNTs based carbon fiber-Preparation of CNTs based carbon fiber -Analysis of microbial system

Weiblen, George D

500

Feasibility Study of Economics and Performance of Biopower at the Chanute Air Force Base in Rantoul, Illinois. A Study Prepared in Partnership with the Environmental Protection Agency for the RE-Powering America's Land Initiative: Siting Renewable Energy on Potentially Contaminated Land and Mine Sites  

SciTech Connect (OSTI)

The U.S. Environmental Protection Agency (EPA), in accordance with the RE-Powering America's Land initiative, selected the Former Chanute Air Force Base site in Rantoul, Illinois, for a feasibility study of renewable energy production. The National Renewable Energy Laboratory (NREL) was contacted to provide technical assistance for this project. The purpose of this study was to assess the site for a possible biopower system installation and estimate the cost, performance, and impacts of different biopower options.

Scarlata, C.; Mosey, G.

2013-05-01T23:59:59.000Z