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Note: This page contains sample records for the topic "hydraulic hybrid systems" from the National Library of EnergyBeta (NLEBeta).
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1

Hydraulic Hybrid Systems | Open Energy Information  

Open Energy Info (EERE)

Hydraulic Hybrid Systems Hydraulic Hybrid Systems Jump to: navigation, search Logo: Hydraulic Hybrid Systems Name Hydraulic Hybrid Systems Address 320 N. Railroad Ave Place Loveland, Colorado Zip 80537 Sector Vehicles Product hydraulic hybrid system for light-duty vehicles Year founded 2008 Number of employees 11-50 Phone number 303-519-4144 Website http://www.hydraulichybridsyst Coordinates 40.394833°, -105.0758931° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.394833,"lon":-105.0758931,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

2

NREL: Fleet Test and Evaluation - Hydraulic Hybrid Drive Systems  

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

Hydraulic Hybrid Drive Systems Hydraulic Hybrid Drive Systems NREL's Fleet Test and Evaluation Team conducts performance evaluations of hydraulic hybrid drive systems in delivery vehicles. Because hydraulic hybrids feature highly efficient regenerative braking systems and "engine off at idle" capabilities, they are ideal for parcel delivery applications where stop-and-go traffic is common. Hydraulic hybrid systems can capture up to 70% of the kinetic energy that would otherwise be lost during braking. This energy drives a pump, which transfers hydraulic fluid from a low-pressure reservoir to a high-pressure accumulator. When the vehicle accelerates, fluid in the high-pressure accumulator moves to the lower-pressure reservoir, which drives a motor and provides extra torque. This process can improve the vehicle's fuel economy

3

NREL: Vehicles and Fuels Research - Hydraulic Hybrid Fleet Vehicle...  

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

Hydraulic Hybrid Fleet Vehicle Testing How Hydraulic Hybrid Vehicles Work Hydraulic hybrid systems can capture up to 70% of the kinetic energy that would otherwise be lost during...

4

Paper Number Development of a Hydro-Mechanical Hydraulic Hybrid Drive  

E-Print Network [OSTI]

drive train is modeled and compared to a series hybrid drive train in operation on the EPA Urban is leveraging the intrinsically high power density of the hydraulic energy storage system through optimal enginePaper Number Development of a Hydro-Mechanical Hydraulic Hybrid Drive Train with Independent Wheel

Li, Perry Y.

5

Electrokinetic high pressure hydraulic system  

DOE Patents [OSTI]

An electrokinetic high pressure hydraulic pump for manipulating fluids in capillary-based systems. The pump uses electro-osmotic flow to provide a high pressure hydraulic system, having no moving mechanical parts, for pumping and/or compressing fluids, for providing valve means and means for opening and closing valves, for controlling fluid flow rate, and manipulating fluid flow generally and in capillary-based systems (Microsystems), in particular. The compact nature of the inventive high pressure hydraulic pump provides the ability to construct a micro-scale or capillary-based HPLC system that fulfills the desire for small sample quantity, low solvent consumption, improved efficiency, the ability to run samples in parallel, and field portability. Control of pressure and solvent flow rate is achieved by controlling the voltage applied to an electrokinetic pump.

Paul, Phillip H. (Livermore, CA); Rakestraw, David J. (Fremont, CA); Arnold, Don W. (Livermore, CA); Hencken, Kenneth R. (Pleasanton, CA); Schoeniger, Joseph S. (Oakland, CA); Neyer, David W. (Castro Valley, CA)

2001-01-01T23:59:59.000Z

6

Fuel Economy Comparisons of Series, Parallel and HMT Hydraulic Hybrid Architectures  

E-Print Network [OSTI]

battery to store energy, and electric motor/generators for energy conversion, a hydraulic hybrid power-train stores energy in hydraulic accumulators and uses hydraulic pump/motors for energy conversion. Hydraulic of these architectures and validates these features. Using a Toyota Prius like engine and chassis as common factors, fuel

Li, Perry Y.

7

A Hybrid, Neuro-Genetic Approach to Hydraulic Fracture Treatment Design and Optimization  

E-Print Network [OSTI]

SPE 36602 A Hybrid, Neuro-Genetic Approach to Hydraulic Fracture Treatment Design and Optimization and novel methodology for optimal design of hydraulic fracture treatments in a gas storage field. What makes very little (almost none) reservoir data availability. Lack of engineering data for hydraulic fracture

Mohaghegh, Shahab

8

Optimal Design of a High-Speed On/Off Valve for a Hydraulic Hybrid Vehicle Application  

E-Print Network [OSTI]

Coefficient 0.6 same none eq Fluid Bulk Modulus 3.7 x 108 1.2 x 109 Pa Pc Check Valve Cracking Pressure 3.2 NOptimal Design of a High-Speed On/Off Valve for a Hydraulic Hybrid Vehicle Application Michael of Minnesota, Minneapolis, MN, USA ABSTRACT Control of hydraulic systems using high-speed on/off valves has

Li, Perry Y.

9

Hybrid Systems State estimation for hybrid systems: applications  

E-Print Network [OSTI]

Hybrid Systems State estimation for hybrid systems: applications to aircraft tracking I. Hwang, H of a stochastic linear hybrid system, given only the continuous system output data, is studied. Well established techniques for hybrid estimation, known as the multiple model adaptive estimation algorithm

Tomlin, Claire

10

Thermal Hydraulic Optimization of Nuclear Systems [Heat Transfer and Fluid  

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

Thermal Hydraulic Thermal Hydraulic Optimization of Nuclear Systems Capabilities Engineering Computation and Design Engineering and Structural Mechanics Systems/Component Design, Engineering and Drafting Heat Transfer and Fluid Mechanics Overview Thermal Hydraulic Optimization of Nuclear Systems Underhood Thermal Management Combustion Simulations Advanced Model and Methodology Development Multi-physics Reactor Performance and Safety Simulations Other Capabilities Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Heat Transfer and Fluid Mechanics Bookmark and Share Thermal Hydraulic Optimization of Nuclear Systems Accelerator Driven Test Facility Target Accelerator Driven Test Facility Target. Click on image to view larger

11

Creation of an Enhanced Geothermal System through Hydraulic and...  

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

an Enhanced Geothermal System on the margin of the Coso field through the hydraulic, thermal, andor chemical stimulation of one or more tight injection wells; to increase the...

12

Solid Waste Operations Complex (SWOC) Facilities Sprinkler System Hydraulic Calculations  

SciTech Connect (OSTI)

The attached calculations demonstrate sprinkler system operational water requirements as determined by hydraulic analysis. Hydraulic calculations for the waste storage buildings of the Central Waste Complex (CWC), T Plant, and Waste Receiving and Packaging (WRAP) facility are based upon flow testing performed by Fire Protection Engineers from the Hanford Fire Marshal's office. The calculations received peer review and approval prior to release. The hydraulic analysis program HASS Computer Program' (under license number 1609051210) is used to perform all analyses contained in this document. Hydraulic calculations demonstrate sprinkler system operability based upon each individual system design and available water supply under the most restrictive conditions.

KERSTEN, J.K.

2003-07-11T23:59:59.000Z

13

Hybrid Neural Systems Stefan Wermter  

E-Print Network [OSTI]

Hybrid Neural Systems Stefan Wermter Ron Sun Springer, Heidelberg, New York January 2000 #12; Preface The aim of this book is to present a broad spectrum of current research in hybrid neural systems, and advance the state of the art in neural networks and arti#12;cial intelligence. Hybrid neural systems

Varela, Carlos

14

Hydraulically actuated fuel injector including a pilot operated spool valve assembly and hydraulic system using same  

DOE Patents [OSTI]

The present invention relates to hydraulic systems including hydraulically actuated fuel injectors that have a pilot operated spool valve assembly. One class of hydraulically actuated fuel injectors includes a solenoid driven pilot valve that controls the initiation of the injection event. However, during cold start conditions, hydraulic fluid, typically engine lubricating oil, is particularly viscous and is often difficult to displace through the relatively small drain path that is defined past the pilot valve member. Because the spool valve typically responds slower than expected during cold start due to the difficulty in displacing the relatively viscous oil, accurate start of injection timing can be difficult to achieve. There also exists a greater difficulty in reaching the higher end of the cold operating speed range. Therefore, the present invention utilizes a fluid evacuation valve to aid in displacement of the relatively viscous oil during cold start conditions.

Shafer, Scott F. (Morton, IL)

2002-01-01T23:59:59.000Z

15

Hydraulic Hybrid and Conventional Parcel Delivery Vehicles' Measured Laboratory Fuel Economy on Targeted Drive Cycles  

SciTech Connect (OSTI)

This research project compares laboratory-measured fuel economy of a medium-duty diesel powered hydraulic hybrid vehicle drivetrain to both a conventional diesel drivetrain and a conventional gasoline drivetrain in a typical commercial parcel delivery application. Vehicles in this study included a model year 2012 Freightliner P100H hybrid compared to a 2012 conventional gasoline P100 and a 2012 conventional diesel parcel delivery van of similar specifications. Drive cycle analysis of 484 days of hybrid parcel delivery van commercial operation from multiple vehicles was used to select three standard laboratory drive cycles as well as to create a custom representative cycle. These four cycles encompass and bracket the range of real world in-use data observed in Baltimore United Parcel Service operations. The NY Composite cycle, the City Suburban Heavy Vehicle Cycle cycle, and the California Air Resources Board Heavy Heavy-Duty Diesel Truck (HHDDT) cycle as well as a custom Baltimore parcel delivery cycle were tested at the National Renewable Energy Laboratory's Renewable Fuels and Lubricants Laboratory. Fuel consumption was measured and analyzed for all three vehicles. Vehicle laboratory results are compared on the basis of fuel economy. The hydraulic hybrid parcel delivery van demonstrated 19%-52% better fuel economy than the conventional diesel parcel delivery van and 30%-56% better fuel economy than the conventional gasoline parcel delivery van on cycles other than the highway-oriented HHDDT cycle.

Lammert, M. P.; Burton, J.; Sindler, P.; Duran, A.

2014-10-01T23:59:59.000Z

16

Towards a Hybrid Dynamic Logic for Hybrid Dynamic Systems1  

E-Print Network [OSTI]

HyLo 2006 Towards a Hybrid Dynamic Logic for Hybrid Dynamic Systems1 Andr´e Platzer2 Carnegie platzer@informatik.uni-oldenburg.de Abstract We introduce a hybrid variant of a dynamic logic for this extended hybrid dynamic logic. With the addition of satisfaction operators, this hybrid logic provides

Platzer, André

17

Capsule injection system for a hydraulic capsule pipelining system  

DOE Patents [OSTI]

An injection system for injecting capsules into a hydraulic capsule pipelining system, the pipelining system comprising a pipeline adapted for flow of a carrier liquid therethrough, and capsules adapted to be transported through the pipeline by the carrier liquid flowing through the pipeline. The injection system comprises a reservoir of carrier liquid, the pipeline extending within the reservoir and extending downstream out of the reservoir, and a magazine in the reservoir for holding capsules in a series, one above another, for injection into the pipeline in the reservoir. The magazine has a lower end in communication with the pipeline in the reservoir for delivery of capsules from the magazine into the pipeline.

Liu, Henry (Columbia, MO)

1982-01-01T23:59:59.000Z

18

Global optimization of hybrid systems  

E-Print Network [OSTI]

Systems that exhibit both discrete state and continuous state dynamics are called hybrid systems. In most nontrivial cases, these two aspects of system behavior interact to such a significant extent that they cannot be ...

Lee, Cha Kun

2006-01-01T23:59:59.000Z

19

Vehicle Technologies Office: Hybrid and Vehicle Systems  

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

Hybrid and Vehicle Hybrid and Vehicle Systems to someone by E-mail Share Vehicle Technologies Office: Hybrid and Vehicle Systems on Facebook Tweet about Vehicle Technologies Office: Hybrid and Vehicle Systems on Twitter Bookmark Vehicle Technologies Office: Hybrid and Vehicle Systems on Google Bookmark Vehicle Technologies Office: Hybrid and Vehicle Systems on Delicious Rank Vehicle Technologies Office: Hybrid and Vehicle Systems on Digg Find More places to share Vehicle Technologies Office: Hybrid and Vehicle Systems on AddThis.com... Just the Basics Hybrid & Vehicle Systems Modeling & Simulation Integration & Validation Benchmarking Parasitic Loss Reduction Propulsion Systems Advanced Vehicle Evaluations Energy Storage Advanced Power Electronics & Electrical Machines

20

Hybrid Automata-based CEGAR for Rectangular Hybrid Systems  

E-Print Network [OSTI]

Hybrid Automata-based CEGAR for Rectangular Hybrid Systems Pavithra Prabhakar, Sridhar Duggirala- example guided abstraction-refinement (CEGAR) for systems modelled as rectangular hybrid automata. The main difference, between our ap- proach and previous proposals for CEGAR for hybrid automata

Liberzon, Daniel

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Hybrid spread spectrum radio system  

DOE Patents [OSTI]

Systems and methods are described for hybrid spread spectrum radio systems. A method, includes receiving a hybrid spread spectrum signal including: fast frequency hopping demodulating and direct sequence demodulating a direct sequence spread spectrum signal, wherein multiple frequency hops occur within a single data-bit time and each bit is represented by chip transmissions at multiple frequencies.

Smith, Stephen F. (London, TN) [London, TN; Dress, William B. (Camas, WA) [Camas, WA

2010-02-09T23:59:59.000Z

22

Hybrid Thin Film Deposition System | EMSL  

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

Hybrid Thin Film Deposition System Hybrid Thin Film Deposition System Only available at EMSL, the Discovery Deposition System has been customized to be a fully automated...

23

International Space Station power module thermal control system hydraulic performance  

SciTech Connect (OSTI)

The International Space Station (ISS) uses four photovoltaic power modules (PVMs) to provide electric power for the US On-Orbit Segment. The PVMs consist of photovoltaic arrays (PVAs), orbit replaceable units (ORUs), photovoltaic radiators (PVRs), and a thermal control system (TCS). The PVM TCS function is to maintain selected PVM components within their specified operating ranges. The TCS consists of the pump flow control subassembly (PFCS), piping system, including serpentine tubing for individual component heat exchangers, headers/manifolds, fluid disconnect couplings (FQDCs), and radiator (PVR). This paper describes the major design requirements for the TCS and the results of the system hydraulic performance predictions in regard to these requirements and system component sizing. The system performance assessments were conducted using the PVM TCS fluid network hydraulic model developed for predicting system/component pressure losses and flow distribution. Hardy-Cross method of iteration was used to model the fluid network configuration. Assessments of the system hydraulic performance were conducted based on an evaluation of uncertainties associated with the manufacturing and design tolerances. Based on results of the analysis, it was concluded that all design requirements regarding system performance could be met. The hydraulic performance range, enveloping possible system operating parameter variations was determined.

Goldberg, V. [Boeing North American, Inc., Canoga Park, CA (United States). Rocketdyne Div.

1997-12-31T23:59:59.000Z

24

Hybrid solar lighting systems and components  

DOE Patents [OSTI]

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

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

2007-06-12T23:59:59.000Z

25

Hybrid solar lighting distribution systems and components  

DOE Patents [OSTI]

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

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

2011-07-05T23:59:59.000Z

26

DESIGN OF INTELLIGENT HYDRAULIC EXCAVATOR CONTROL SYSTEM BASED ON  

E-Print Network [OSTI]

according to the engine consumption fuel curve. Transient overload function was designed for deep digging that the auto idle could decrease fuel consumption by 33.33% compared to work in maximum speed of H mode the constant power design method and set 85%~90% of engine power as the hydraulic system adoption power

27

Hybrid Systems: From Verification to Falsification  

E-Print Network [OSTI]

Hybrid Systems: From Verification to Falsification Erion Plaku, Lydia E. Kavraki, and Moshe Y}@cs.rice.edu Abstract. We propose HyDICE, Hybrid DIscrete Continuous Exploration, a multi­layered approach for hybrid. The discrete search uses the discrete transitions of the hybrid system and coarse­grained decompositions

Vardi, Moshe Y.

28

Hybrid Systems: From Verification to Falsification  

E-Print Network [OSTI]

Hybrid Systems: From Verification to Falsification Erion Plaku, Lydia E. Kavraki, and Moshe Y}@cs.rice.edu Abstract. We propose HyDICE, Hybrid DIscrete Continuous Exploration, a multi-layered approach for hybrid. The discrete search uses the discrete transitions of the hybrid system and coarse-grained decompositions

Kavraki, Lydia E.

29

Hybrid powertrain system  

DOE Patents [OSTI]

A powertrain system is provided that includes a first prime mover and change-gear transmission having a first input shaft and a second input shaft. A twin clutch is disposed between the first prime mover and the transmission. The twin clutch includes a first main clutch positioned between the first prime mover and the first input shaft and a second main clutch positioned between the first prime mover and the second input shaft. The powertrain system also includes a second prime mover operably connected to one of the first and second input shafts.

Hughes, Douglas A. (Wixom, MI)

2007-09-25T23:59:59.000Z

30

The integration of water vane pump and hydraulic vane motor for a small desalination system  

Science Journals Connector (OSTI)

An integration of water vane pump and hydraulic vane motor was introduced in small reverse osmosis (RO) system, in which the hydraulic vane motor was used as energy recovery device. The hydraulic performance and energy consumption of one combination of pump and hydraulic motor were investigated under different operation conditions. This type of integration pump reduces energy cost and simplifies the system setup, thus it could be an alternative choice for small RO desalination system. Our results demonstrated that the improvement of volumetric efficiencies of the pump and the hydraulic motor was the main factor to increase the prototype pump performance.

Yong Lu; Yuanyang Zhao; Gaoxuan Bu; Pengcheng Shu

2011-01-01T23:59:59.000Z

31

E-Print Network 3.0 - automated hydraulic system Sample Search...  

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

20, 2007 Page 6 District Heating System Regulate pressure drops at end-users c6, c13... Heating System Underlying hydraulic network ... Source: De Persis, Claudio - Dipartimento...

32

Linear hydraulic drive system for a Stirling engine  

SciTech Connect (OSTI)

A hydraulic drive system operating from the periodic pressure wave produced by a Stirling engine along a first axis thereof and effecting transfer of power from the Stirling engine to a load apparatus therefor and wherein the movable, or working member of the load apparatus is reciprocatingly driven along an axis substantially at right angles to the first axis to achieve an arrangement of a Stirling engine and load apparatus assembly which is much shorter and the components of the load apparatus more readily accessible.

Walsh, Michael M. (Schenectady, NY)

1984-02-21T23:59:59.000Z

33

Linear hydraulic drive system for a Stirling engine  

SciTech Connect (OSTI)

A hydraulic drive system operating from the periodic pressure wave produced by a Stirling engine along a first axis thereof and effecting transfer of power from the Stirling engine to a load apparatus therefor and wherein the movable, or working member of the load apparatus is reciprocatingly driven along an axis substantially at right angles to the first axis to achieve an arrangement of a Stirling engine and load apparatus assembly which is much shorter and the components of the load apparatus more readily accessible. 2 figs.

Walsh, M.M.

1984-02-21T23:59:59.000Z

34

Witnessing entanglement in hybrid systems  

E-Print Network [OSTI]

We extend the definition of entanglement witnesses based on structure factors to the case in which the position of the scatterers is quantized. This allows us to study entanglement detection in hybrid systems. We provide several examples that show how these extra degrees of freedom affect the detection of entanglement by directly contributing to the measurement statistics. We specialize the proposed witness operators for a chain of trapped ions. Within this framework, we show how the collective vibronic state of the chain can act as an undesired quantum environment and how ions quantum motion can affect the entanglement detection. Finally, we investigate some specific cases where the method proposed leads to detection of hybrid entanglement.

Massimo Borrelli; Matteo Rossi; Chiara Macchiavello; Sabrina Maniscalco

2014-04-24T23:59:59.000Z

35

Hybrid spread spectrum radio system  

DOE Patents [OSTI]

Systems and methods are described for hybrid spread spectrum radio systems. A method includes modulating a signal by utilizing a subset of bits from a pseudo-random code generator to control an amplification circuit that provides a gain to the signal. Another method includes: modulating a signal by utilizing a subset of bits from a pseudo-random code generator to control a fast hopping frequency synthesizer; and fast frequency hopping the signal with the fast hopping frequency synthesizer, wherein multiple frequency hops occur within a single data-bit time.

Smith, Stephen F. (London, TN); Dress, William B. (Camas, WA)

2010-02-02T23:59:59.000Z

36

Hybrid slab-microchannel gel electrophoresis system  

DOE Patents [OSTI]

A hybrid slab-microchannel gel electrophoresis system. The hybrid system permits the fabrication of isolated microchannels for biomolecule separations without imposing the constraint of a totally sealed system. The hybrid system is reusable and ultimately much simpler and less costly to manufacture than a closed channel plate system. The hybrid system incorporates a microslab portion of the separation medium above the microchannels, thus at least substantially reducing the possibility of non-uniform field distribution and breakdown due to uncontrollable leakage. A microslab of the sieving matrix is built into the system by using plastic spacer materials and is used to uniformly couple the top plate with the bottom microchannel plate.

Balch, Joseph W. (Livermore, CA); Carrano, Anthony V. (Livermore, CA); Davidson, James C. (Livermore, CA); Koo, Jackson C. (San Ramon, CA)

1998-01-01T23:59:59.000Z

37

Hybrid Membrane System for Industrial Water Reuse  

Broader source: Energy.gov [DOE]

Demonstrate an advanced water treatment and reuse process in a single hybrid system that combines forward osmosis with membrane distillation to achieve greater efficiency and increased water reuse.

38

How to Effectively Compute the Reliability of a Thermal-Hydraulic Nuclear Passive System  

E-Print Network [OSTI]

of a thermal-hydraulic (T-H) passive system of a nuclear power plant can be obtained by i) Monte Carlo (MC1 How to Effectively Compute the Reliability of a Thermal- Hydraulic Nuclear Passive System E. Zio1 be prohibitive because of the large number of (typically long) T-H code simulations that must be performed (one

Boyer, Edmond

39

Hybrid Geometric Reduction of Hybrid Systems Aaron D. Ames and Shankar Sastry  

E-Print Network [OSTI]

Hybrid Geometric Reduction of Hybrid Systems Aaron D. Ames and Shankar Sastry Abstract-- This paper presents a unifying framework in which to carry out the hybrid geometric reduction of hybrid systems, generalizing classical reduction to a hybrid setting. I. INTRODUCTION The reduction of mechanical systems

Sastry, S. Shankar

40

System and method for controlling hydraulic pressure in electro-hydraulic valve actuation systems  

DOE Patents [OSTI]

A control system for an engine includes a first lift control module and a second lift control module. The first lift control module increases lift of M valves of the engine to a predetermined valve lift during a period before disabling or re-enabling N valves of the engine. The second lift control module decreases the lift of the M valves to a desired valve lift during a period after enabling or re-enabling the N valves of the engine, wherein N and M are integers greater than or equal to one.

Brennan, Daniel G; Marriott, Craig D; Cowgill, Joel; Wiles, Matthew A; Patton, Kenneth James

2014-09-23T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Hydraulics of horizontal wells in fractured shallow aquifer systems Eungyu Parka,*, Hongbin Zhanb  

E-Print Network [OSTI]

Hydraulics of horizontal wells in fractured shallow aquifer systems Eungyu Parka,*, Hongbin Zhanb Accepted 1 May 2003 Abstract An analysis of groundwater hydraulic head in the vicinity of a horizontal well in fractured or porous aquifers considering confined, leaky confined, and water-table aquifer boundary

Zhan, Hongbin

42

On hybrid control of complex systems: Sur la commande hybride des systmes  

E-Print Network [OSTI]

On hybrid control of complex systems: a survey Sur la commande hybride des syst·mes complexes a brief overview of hybrid control systems is given and an introduction to several approaches in hybrid to hybrid control. RESUME. L'objectif de cet article est de prZsenter un Ztat de l'art des travaux relatifs

Koutsoukos, Xenofon D.

43

A Federated Simulation Environment for Hybrid Systems  

Science Journals Connector (OSTI)

Hybrid computing systems consisting of multiple platform types (e.g., general purpose processors, FPGAs etc.) are increasingly being used to achieve higher performance and lower costs than can be obtained with homogeneous systems (e.g., processor clusters). ...

Saurabh Gayen; Eric J. Tyson; Mark A. Franklin; Roger D. Chamberlain

2007-06-01T23:59:59.000Z

44

Vehicle Technologies Office: Hybrid and Vehicle Systems  

Broader source: Energy.gov [DOE]

Hybrid and vehicle systems research provides an overarching vehicle systems perspective to the technology research and development (R&D) activities of the U.S. Department of Energy's (DOE's)...

45

Hybrid slab-microchannel gel electrophoresis system  

DOE Patents [OSTI]

A hybrid slab-microchannel gel electrophoresis system is described. The hybrid system permits the fabrication of isolated microchannels for biomolecule separations without imposing the constraint of a totally sealed system. The hybrid system is reusable and ultimately much simpler and less costly to manufacture than a closed channel plate system. The hybrid system incorporates a microslab portion of the separation medium above the microchannels, thus at least substantially reducing the possibility of non-uniform field distribution and breakdown due to uncontrollable leakage. A microslab of the sieving matrix is built into the system by using plastic spacer materials and is used to uniformly couple the top plate with the bottom microchannel plate. 4 figs.

Balch, J.W.; Carrano, A.V.; Davidson, J.C.; Koo, J.C.

1998-05-05T23:59:59.000Z

46

Maximizing Commercial Hydraulic Software Simulation in Thermal Distribution System Continuous Commissioning  

E-Print Network [OSTI]

, such as water distribution systems, industrial cooling systems, oil pipelines, or any network carrying an impressible newtonian fluid in full pipe from purily hydraulic point of view. It not only provides simulation models for pipes, tees, heat exchangers..., such as water distribution systems, industrial cooling systems, oil pipelines, or any network carrying an impressible newtonian fluid in full pipe from purily hydraulic point of view. It not only provides simulation models for pipes, tees, heat exchangers...

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

2005-01-01T23:59:59.000Z

47

Advanced Hydraulic Wind Energy  

Science Journals Connector (OSTI)

The Jet Propulsion Laboratory, California Institute of Technology, has developed a novel advanced hydraulic wind energy design, which has up to 23% performance improvement over conventional wind turbine and conventional hydraulic wind energy systems ... Keywords: wind, tide, energy, power, hydraulic

Jack A. Jones; Allan Bruce; Adrienne S. Lam

2013-04-01T23:59:59.000Z

48

Advanced, Energy-Efficient Hybrid Membrane System for Industrial...  

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

Advanced, Energy-Efficient Hybrid Membrane System for Industrial Water Reuse Advanced, Energy-Efficient Hybrid Membrane System for Industrial Water Reuse hybridmembranesystemsfa...

49

2014 Annual Merit Review Results Report - Hybrid Vehicle Systems...  

Energy Savers [EERE]

Hybrid Vehicle Systems Technologies 2014 Annual Merit Review Results Report - Hybrid Vehicle Systems Technologies Merit review of DOE Vehicle Technologies research activities...

50

Advanced, Energy-Efficient Hybrid Membrane System for Industrial...  

Energy Savers [EERE]

MANUFACTURING OFFICE Advanced, Energy- Efficient Hybrid Membrane System for Industrial Water Reuse New Hybrid Membrane System Utilizes Industrial Waste Heat to Power Water...

51

Advanced Methods Approach to Hybrid Powertrain Systems Optimization...  

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

Methods Approach to Hybrid Powertrain Systems Optimization of a Transit Bus Application Advanced Methods Approach to Hybrid Powertrain Systems Optimization of a Transit Bus...

52

Hybrid Ground Source System Analysis and Tool Development | Department...  

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

Hybrid Ground Source System Analysis and Tool Development Hybrid Ground Source System Analysis and Tool Development Project objectives: 1. Compile filtered hourly data for three...

53

The University of Tennessee's GATE Center for Hybrid Systems...  

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

The University of Tennessee's GATE Center for Hybrid Systems The University of Tennessee's GATE Center for Hybrid Systems 2009 DOE Hydrogen Program and Vehicle Technologies Program...

54

The University of Tennessee's GATE Center for Hybrid Systems...  

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

The University of Tennessee's GATE Center for Hybrid Systems The University of Tennessee's GATE Center for Hybrid Systems Presentation from the U.S. DOE Office of Vehicle...

55

Non-standard semantics of hybrid systems modelers  

Science Journals Connector (OSTI)

Hybrid system modelers have become a corner stone of complex embedded system development. Embedded systems include not only control components and software, but also physical devices. In this area, Simulink is a de facto standard design framework, and ... Keywords: Compilation of hybrid systems, Constructive semantics, Hybrid systems, Hybrid systems modelers, Kahn process networks, Non-standard analysis, Non-standard semantics

Albert Benveniste; Timothy Bourke; Benot Caillaud; Marc Pouzet

2012-05-01T23:59:59.000Z

56

Interchange format for hybrid systems: abstract semantics  

Science Journals Connector (OSTI)

In [1] we advocated the need for an interchange format for hybrid systems that enables the integration of design tools coming from many different research communities. In deriving such interchange format the main challenge is to define a language that, ...

Alessandro Pinto; Luca P. Carloni; Roberto Passerone; Alberto Sangiovanni-Vincentelli

2006-03-01T23:59:59.000Z

57

Design and analysis of hydraulically driven actuation system For a parabolic solar trough  

E-Print Network [OSTI]

This thesis documents Katarina Popovic's contribution to the design of hydraulic cylinder actuation system for day to day solar trough sun tracking, a semester long project within 2.752 Development of Mechanical Products ...

Popovi?, Katarina, S.B. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

58

Predicting hydraulic tensile fracture spacing in strata-bound systems$ C.I. McDermott n  

E-Print Network [OSTI]

Predicting hydraulic tensile fracture spacing in strata-bound systems$ C.I. McDermott n , K June 2013 Available online 15 July 2013 Keywords: Hydraulic fracturing Fracture spacing CO2 analogue that hydraulic fracturing can be expected in the lower layers of a caprock after a relatively short period

Haszeldine, Stuart

59

Hybrid Systems with Finite Bisimulations Gerardo Lafferriere1  

E-Print Network [OSTI]

Hybrid Systems with Finite Bisimulations Gerardo Lafferriere1 , George J. Pappas2 , and Shankar is one of the main approach- es to hybrid system analysis. Decidability questions for verification algo classes of planar hybrid systems. 1 Introduction Hybrid systems consist of finite state machines

Pappas, George J.

60

Hybrid optomechanical cooling by atomic $?$ systems  

E-Print Network [OSTI]

We investigate a hybrid quantum system consisting of a cavity optomechanical device optically coupled to an ultracold quantum gas. We show that the dispersive properties of the ultracold gas can be used to dramatically modify the optomechanical response of the mechanical resonator. We examine hybrid schemes wherein the mechanical resonator is coupled either to the motional or the spin degrees of freedom of the ultracold gas. In either case, we find an enhancement of more than two orders of magnitude in optomechanical cooling due to this hybrid interaction. Significantly, based on demonstrated parameters for the cavity optomechanical device, we identify regimes that enable the ground state cooling of the resonator from room temperature. In addition, the hybrid system considered here represents a powerful interface for the use of an ultracold quantum gas for state preparation, sensing and quantum manipulation of a mesoscopic mechanical resonator.

F. Bariani; S. Singh; L. F. Buchmann; M. Vengalattore; P. Meystre

2014-07-03T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

A HYBRID RECONFIGURABLE SOLAR AND WIND ENERGY SYSTEM.  

E-Print Network [OSTI]

??We study the feasibility of a novel hybrid solar-wind hybrid system that shares most of its infrastructure and components. During periods of clear sunny days (more)

Gadkari, Sagar A.

2008-01-01T23:59:59.000Z

62

Hybrid Braking System for Non-Drive Axles  

Broader source: Energy.gov [DOE]

A hybrid braking system is designed to conserve diesel fuel (or alternative fuels) by using regenerative braking, which extends hybrid technology to non-drive axles.

63

Stability analysis and controller synthesis for hybrid dynamical systems  

Science Journals Connector (OSTI)

...Yovine1995The algorithmic analysis of hybrid systemsTheoret...systemsHybrid systems:computation...controlLecture Notes in Computer Science, no...systemsHybrid systems:computation...controlLecture Notes in Computer Science, no...systemsIEEE Control Systems Mag. 28 3673...Iung2002Stability analysis and control synthesis...

2010-01-01T23:59:59.000Z

64

Control method and system for hydraulic machines employing a dynamic joint motion model  

DOE Patents [OSTI]

A control method and system for controlling a hydraulically actuated mechanical arm to perform a task, the mechanical arm optionally being a hydraulically actuated excavator arm. The method can include determining a dynamic model of the motion of the hydraulic arm for each hydraulic arm link by relating the input signal vector for each respective link to the output signal vector for the same link. Also the method can include determining an error signal for each link as the weighted sum of the differences between a measured position and a reference position and between the time derivatives of the measured position and the time derivatives of the reference position for each respective link. The weights used in the determination of the error signal can be determined from the constant coefficients of the dynamic model. The error signal can be applied in a closed negative feedback control loop to diminish or eliminate the error signal for each respective link.

Danko, George (Reno, NV)

2011-11-22T23:59:59.000Z

65

Control system for a hybrid powertrain system  

DOE Patents [OSTI]

A vehicle includes a powertrain with an engine, first and second torque machines, and a hybrid transmission. A method for operating the vehicle includes operating the engine in an unfueled state, releasing an off-going clutch which when engaged effects operation of the hybrid transmission in a first continuously variable mode, and applying a friction braking torque to a wheel of the vehicle to compensate for an increase in an output torque of the hybrid transmission resulting from releasing the off-going clutch. Subsequent to releasing the off-going clutch, an oncoming clutch which when engaged effects operation of the hybrid transmission in a second continuously variable mode is synchronized. Subsequent to synchronization of the oncoming clutch, the oncoming clutch is engaged.

Naqvi, Ali K.; Demirovic, Besim; Gupta, Pinaki; Kaminsky, Lawrence A.

2014-09-09T23:59:59.000Z

66

CAN-bus based distributed control system for hydraulic turbine blade repairing robot  

Science Journals Connector (OSTI)

A CAN-bus (Controller Area Network) based distributed control system was designed for a mobile on-site hydraulic turbine blade repairing robot (HTBRR). The system is composed of one supervisory station, seven joint servo nodes, and four accessory nodes. ... Keywords: distributed control system, mobile robot, virtual reality

Kangtai Xiang; Zhenguo Sun; Hongjun Dai; Qiang Chen; Jiajun Liu

2010-11-01T23:59:59.000Z

67

Modeling and Analysis of Hybrid Systems Reachability analysis for hybrid automata  

E-Print Network [OSTI]

and Analysis of Hybrid Systems 1 / 8 #12;General forward reachability computation Input: Set Init of initial(P) for a set P? Ábrahám - Modeling and Analysis of Hybrid Systems 3 / 8 #12;Reachability computation When. Ábrahám - Modeling and Analysis of Hybrid Systems 3 / 8 #12;Reachability computation When applied

Ábrahám, Erika

68

Study of Energy and Demand Savings on a High Efficiency Hydraulic Pump System with Infinite Turn Down Technology (ITDT)  

E-Print Network [OSTI]

and demand savings between an injection molding machine retrofitted with the high efficiency hydraulic pump system or variable frequency drive will also be presented....

Sfeir, R. A.; Kanungo, A.; Liou, S.

2005-01-01T23:59:59.000Z

69

Energy-saving analysis in the hydraulic system of loader working device  

Science Journals Connector (OSTI)

Currently, with the increase of the fuel price, the demands for energy saving technology in construction machinery have been strengthened gradually. Various methods and theories for fuel consumption have been advanced. In this paper, a loader working device used in hydraulic system is built in SimulationX software. Based on the model, the energy saving strategies of the loader are analysed and the hydraulic system of loader working device was proposed to reduce the energy consumption and improve the working efficiency. Through the comparison between simulation and experimental results, several energy saving points can be found by analysing the pressure and flow. Moreover, it is concluded that overflow loss was the main way of power loss in hydraulic system of loader working device.

Weiwei Zhang; Jun Zhou; Yanliang Zhang; Panling Huang; Jianxin Deng

2012-01-01T23:59:59.000Z

70

Interchange Format for Hybrid Systems: Abstract Semantics  

E-Print Network [OSTI]

of implicit equations [4, 5]. The language is object-oriented and objects can be instantiated inside otherInterchange Format for Hybrid Systems: Abstract Semantics Alessandro Pinto1 , Luca P. Carloni3 general enough to accommodate the translation across the various modeling approaches used in the ex

Carloni, Luca

71

Hybrid Energy System Modeling in Modelica  

SciTech Connect (OSTI)

In this paper, a Hybrid Energy System (HES) configuration is modeled in Modelica. Hybrid Energy Systems (HES) have as their defining characteristic the use of one or more energy inputs, combined with the potential for multiple energy outputs. Compared to traditional energy systems, HES provide additional operational flexibility so that high variability in both energy production and consumption levels can be absorbed more effectively. This is particularly important when including renewable energy sources, whose output levels are inherently variable, determined by nature. The specific HES configuration modeled in this paper include two energy inputs: a nuclear plant, and a series of wind turbines. In addition, the system produces two energy outputs: electricity and synthetic fuel. The models are verified through simulations of the individual components, and the system as a whole. The simulations are performed for a range of component sizes, operating conditions, and control schemes.

William R. Binder; Christiaan J. J. Paredis; Humberto E. Garcia

2014-03-01T23:59:59.000Z

72

High speed hydraulically-actuated operating system for an electric circuit breaker  

DOE Patents [OSTI]

This hydraulically-actuated operating system comprises a cylinder, a piston movable therein in an opening direction to open a circuit breaker, and an accumulator for supplying pressurized liquid to a breaker-opening piston-actuating space within the cylinder. A normally-closed valve between the accumulator and the actuating space is openable to allow pressurized liquid from the accumulator to flow through the valve into the actuating space to drive the piston in an opening direction. A dashpotting mechanism operating separately from the hydraulic actuating system is provided, thereby reducing flow restriction interference with breaker opening. 3 figs.

Iman, I.

1983-06-07T23:59:59.000Z

73

An automatic guidance system for tractors with open-center hydraulics  

E-Print Network [OSTI]

AN AUTOMATIC GUIDANCE SYSTEM FOR TRACTORS WITH OPEN-CENTER HYDRAULICS A Thesis by THOMAS ALAN POOL Submi'tted to the Graduate Co'liege of Texas A8, M University in partial fulfillment of the requirements for the degree or MASTER OF SCIENCE... August 1984 Major Subject: Agricultural Engineering AN AUTOMATIC GUIDANCE SYSTEM FOR TRACTORS WITH OPEN-CENTER HYDRAULICS A Thesis THOMAS ALAN POOL Approved as to style and content by: (Chairman oF Commi tee) (Head oF Department) (Member) (Member...

Pool, Thomas Alan

2012-06-07T23:59:59.000Z

74

Micro Hydro-Diesel Hybrid Power System  

E-Print Network [OSTI]

This paper presents the design and analysis of Neuro-Fuzzy controller based on Adaptive Neuro-Fuzzy Inference System (ANFIS) architecture for Load frequency control of an isolated wind-micro hydro-diesel hybrid power system, to regulate the frequency deviation and power deviations. Due to the sudden load changes and intermittent wind power, large frequency fluctuation problem can occur. This newly developed control strategy combines the advantage of neural networks and fuzzy inference system and has simple structure that is easy to implement. So, in order to keep system performance near its optimum, it is desirable to track the operating conditions and use updated parameters to control the system. Simulations of the proposed ANFIS based Neuro-Fuzzy controller in an isolated wind-micro hydro-diesel hybrid power system with different load disturbances are performed. Also, a conventional proportional Integral (PI) controller and a fuzzy logic (FL) controller were designed separately to control the same hybrid power system for the performance comparison. The performance of the proposed controller is verified from simulations and comparisons. Simulation results show that the performance of the proposed ANFIS based Neuro-Fuzzy Controller damps out the frequency deviation and attains the steady state value with less settling time. The proposed ANFIS based Neuro-Fuzzy controller provides best control performance over a wide range of operating conditions.

Dhanalakshmi R; Palaniswami S

75

Analysis of hybrid solar systems  

SciTech Connect (OSTI)

This study uses the TRNSYS simulation program to evaluate the performance of active charge/passive discharge solar systems with water as the working fluid. This design was introduced in the Village Homes development in Davis, Calif., and is currently being used by Trident Energy Systems in Davis. TRNSYS simulations are used to evaluate the heating performance and cooling augmentation provided by systems in several climates. The results of the simulations are used to develop a simplified analysis tool similar to the F-chart and Phi-bar procedures used for active systems. This tool, currently in a preliminary stage, should provide the designer with quantitative performance estimates for comparison with other passive, active, and nonsolar heating and cooling designs.

Swisher, J.

1980-10-01T23:59:59.000Z

76

Hybrid Dynamical Systems, or HDS: The Ultimate Switching Experience  

E-Print Network [OSTI]

Hybrid Dynamical Systems, or HDS: The Ultimate Switching Experience Michael S. Branicky Laboratory concentrated on formalizing the notion of a hybrid system as switching among an indexed collection of dynamical give a quick overview of the area of hybrid systems. I also briefly review the formal definition

Branicky, Michael S.

77

Hybrid Systems: Review and Recent Progress Panos J. Antsaklis  

E-Print Network [OSTI]

Hybrid Systems: Review and Recent Progress Panos J. Antsaklis Department of Electrical Engineering of this volume focuses on hybrid dynamical systems, an area of research that has developed as a result communities. This chapter provides a broad-based introduction to hybrid systems and discusses a number

Koutsoukos, Xenofon D.

78

Hybrid Wind and Solar Electric Systems | Department of Energy  

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

Hybrid Wind and Solar Electric Systems Hybrid Wind and Solar Electric Systems Hybrid Wind and Solar Electric Systems July 2, 2012 - 8:21pm Addthis Because the peak operating times for wind and solar systems occur at different times of the day and year, hybrid systems are more likely to produce power when you need it. Because the peak operating times for wind and solar systems occur at different times of the day and year, hybrid systems are more likely to produce power when you need it. How does it work? A small "hybrid" electric system that combines wind and solar technologies can offer several advantages over either single system. According to many renewable energy experts, a small "hybrid" electric system that combines home wind electric and home solar electric (photovoltaic or PV) technologies offers several advantages over either

79

Improving the Efficiency of Die Casting Machine Hydraulic Systems with the Retrofit of Adjustable Frequency Drives  

E-Print Network [OSTI]

because there is typically no way to limit the hydraulic capacity during periods of low demand. As a result, fluid is throttled to lower pressures and excess fluid flow is routed directly back to the system reservoir, wasting motor energy and increasing...

Ambs, L.; Kosanovic, D.; Edberg, C.

80

Hybrid cavity mechanics with doped systems  

E-Print Network [OSTI]

We investigate the dynamics of a mechanical resonator in which is embedded an ensemble of two-level systems interacting with an optical cavity field. We show that this hybrid approach to optomechanics allows for enhanced effective interactions between the mechanics and the cavity field, leading for instance to ground state cooling of the mechanics, even in regimes, like the unresolved sideband regime, in which standard radiation pressure cooling would be inefficient.

Aurelien Dantan; Bhagya Nair; Guido Pupillo; Claudiu Genes

2014-06-27T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Thermal-hydraulics Analysis of a Radioisotope-powered Mars Hopper Propulsion System  

SciTech Connect (OSTI)

Thermal-hydraulics analyses results produced using a combined suite of computational design and analysis codes are presented for the preliminary design of a concept Radioisotope Thermal Rocket (RTR) propulsion system. Modeling of the transient heating and steady state temperatures of the system is presented. Simulation results for propellant blow down during impulsive operation are also presented. The results from this study validate the feasibility of a practical thermally capacitive RTR propulsion system.

Robert C. O'Brien; Andrew C. Klein; William T. Taitano; Justice Gibson; Brian Myers; Steven D. Howe

2011-02-01T23:59:59.000Z

82

Design of isolated renewable hybrid power systems  

SciTech Connect (OSTI)

Isolated electrical power generating units can be used as an economically viable alternative to electrify remote villages where grid extension is not feasible. One of the options for building isolated power systems is by hybridizing renewable power sources like wind, solar, micro-hydro, etc. along with appropriate energy storage. A method to optimally size and to evaluate the cost of energy produced by a renewable hybrid system is proposed in this paper. The proposed method, which is based on the design space approach, can be used to determine the conditions for which hybridization of the system is cost effective. The simple and novel methodology, proposed in this paper, is based on the principles of process integration. It finds the minimum battery capacity when the availability and ratings of various renewable resources as well as load demand are known. The battery sizing methodology is used to determine the sizing curve and thereby the feasible design space for the entire system. Chance constrained programming approach is used to account for the stochastic nature of the renewable energy resources and to arrive at the design space. The optimal system configuration in the entire design space is selected based on the lowest cost of energy, subject to a specified reliability criterion. The effects of variation of the specified system reliability and the coefficient of correlation between renewable sources on the design space, as well as the optimum configuration are also studied in this paper. The proposed method is demonstrated by designing an isolated power system for an Indian village utilizing wind-solar photovoltaic-battery system. (author)

Sreeraj, E.S.; Chatterjee, Kishore [Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai 400 076 (India); Bandyopadhyay, Santanu [Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Mumbai 400 076 (India)

2010-07-15T23:59:59.000Z

83

Hybrid Power System Simulation Model | Open Energy Information  

Open Energy Info (EERE)

Hybrid Power System Simulation Model Hybrid Power System Simulation Model Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Hybrid Power System Simulation Model Focus Area: Renewable Energy Topics: System & Application Design Website: www.umass.edu/windenergy/OLD_SITE/projects/hybrid2/ Equivalent URI: cleanenergysolutions.org/content/hybrid-power-system-simulation-model, Language: English Policies: Deployment Programs DeploymentPrograms: Technical Assistance This tool performs detailed long-term performance and economic analysis on a wide variety of hybrid power systems. It is a probabilistic/time-series computer model, using time-series data for loads, wind speed, solar insolation, temperature, and the power system designed or selected by the user, to predict the performance of the hybrid power system. An economic

84

HYBRID SYSTEMS: GENERALIZED SOLUTIONS AND ROBUST STABILITY 1  

E-Print Network [OSTI]

HYBRID SYSTEMS: GENERALIZED SOLUTIONS AND ROBUST STABILITY 1 Rafal Goebel Joao Hespanha Andrew R asymptotic stability for hybrid systems is considered. For this purpose, a generalized solution concept is developed. The first step is to characterize a hybrid time domain that permits an efficient description

Goebel, Rafal

85

CLONTECHInnovative MATCHMAKER GAL4 Two-Hybrid System 3  

E-Print Network [OSTI]

CLONTECHInnovative Tools to Accelerate Discovery MATCHMAKER GAL4 Two-Hybrid System 3 & Libraries FOR RESEARCH USE ONLY #12;MATCHMAKER GAL4 Two-Hybrid System 3 & Libraries User Manual CLONTECH Laboratories Two-Hybrid Screen 8 III. Lists of Components 9 IV. Additional Materials Required 10 V. Yeast Strains

Erickson, F. Les

86

Shooting Methods for Locating Grazing Phenomena in Hybrid Systems  

E-Print Network [OSTI]

Shooting Methods for Locating Grazing Phenomena in Hybrid Systems Vaibhav Donde Ian A. Hiskens Abstract Hybrid systems are typified by strong coupling between continuous dynamics and discrete events using shooting methods that are applicable for general nonlinear hybrid (piecewise smooth) dynamical

87

Benefits of battery-uItracapacitor hybrid energy storage systems  

E-Print Network [OSTI]

This thesis explores the benefits of battery and battery-ultracapacitor hybrid energy storage systems (ESSs) in pulsed-load applications. It investigates and quantifies the benefits of the hybrid ESS over its battery-only ...

Smith, Ian C., S.M. (Ian Charles). Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

88

Bachelor Thesis Detection of Zeno Sets in Hybrid Systems  

E-Print Network [OSTI]

Bachelor Thesis Detection of Zeno Sets in Hybrid Systems to Validate Modelica Simulations Marcel . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.3 Example: Water Tank . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Modelica 9 3.1 OpenModelica . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.1.1 Hybrid Automata

89

Hybrid Systems and Biology. Continuous and Discrete Modeling for Systems Biology  

E-Print Network [OSTI]

Hybrid Systems and Biology. Continuous and Discrete Modeling for Systems Biology Luca Bortolussi1 (IGA) alberto.policriti@appliedgenomics.org Abstract. Hybrid Systems are dynamical systems presenting both dis- crete and continuous evolution. Hybrid Automata are a formal model for hybrid systems

Bortolussi, Luca

90

Hybrid quantum-classical models as constrained quantum systems  

E-Print Network [OSTI]

Constrained Hamiltonian description of the classical limit is utilized in order to derive consistent dynamical equations for hybrid quantum-classical systems. Starting with a compound quantum system in the Hamiltonian formulation conditions for classical behavior are imposed on one of its subsystems and the corresponding hybrid dynamical equations are derived. The presented formalism suggests that the hybrid systems have properties that are not exhausted by those of quantum and classical systems.

M. Radonjic; S. Prvanovic; N. Buric

2012-06-07T23:59:59.000Z

91

NREL: Fleet Test and Evaluation - Hybrid Electric Drive Systems  

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

Hybrid Electric Drive Systems Hybrid Electric Drive Systems The Fleet Test and Evaluation Team conducts performance evaluations of hybrid electric drive systems in fleets of delivery vehicles and transit buses. Hybrid electric drive systems combine a primary power source, an energy storage system, and an electric motor to achieve a combination of emissions, fuel economy, and range benefits unattainable with any of these technologies alone. Hybrid electric drive systems use less petroleum-based fuel and capture energy created during breaking and idling. This collected energy is used to propel the vehicle during normal drive cycles. The batteries supply additional power for acceleration and hill climbing. Learn more about the team's hybrid electric drive system evaluations: Delivery Vehicles

92

Using seismic tomography to characterize fracture systems induced by hydraulic fracturing  

SciTech Connect (OSTI)

Microearthquakes induced by hydraulic fracturing have been studied by many investigators to characterize fracture systems created by the fracturing process and to better understand the locations of energy resources in the earth`s subsurface. The pattern of the locations often contains a great deal of information about the fracture system stimulated during the hydraulic fracturing. Seismic tomography has found applications in many areas for characterizing the subsurface of the earth. It is well known that fractures in rock influence both the P and S velocities of the rock. The influence of the fractures is a function of the geometry of the fractures, the apertures and number of fractures, and the presence of fluids in the fractures. In addition, the temporal evolution of the created fracture system can be inferred from the temporal changes in seismic velocity and the pattern of microearthquake locations. Seismic tomography has been used to infer the spatial location of a fracture system in a reservoir that was created by hydraulic fracturing.

Fehler, M.; Rutledge, J.

1995-01-01T23:59:59.000Z

93

Nuclear Hybrid Energy Systems: Challenges and Opportunities  

SciTech Connect (OSTI)

With growing demand of energy and costs of the fossil fuels, coupled with the environmental concerns have resulted in an increased interest in alternative energy sources. Nuclear hybrid energy systems (NHES) are being considered which incorporates renewable energy sources such as solar and wind energy combined with nuclear reactor and energy storage to meet the peak hours demand imposed on the grid, along with providing process heat for other potential industrial applications. This concept could potentially satisfy various energy demands and improve reliability, robustness and resilience for the entire system as a whole, along with economic and net efficiency gains. This paper provides a brief understanding of potential NHES system and architecture along with the challenges

P. Sabharwall; S.B. Sitton; S.J. Yoon; C. Stoots

2014-07-01T23:59:59.000Z

94

School of Mechanical Engineering, Purdue UniversitySchool of Mechanical Engineering, Purdue UniversitySchool of Mechanical Engineering, Purdue University Energy Saving Control of Hydraulic SystemsEnergy Saving Control of Hydraulic Systems  

E-Print Network [OSTI]

School of Mechanical Engineering, Purdue UniversitySchool of Mechanical Engineering, Purdue UniversitySchool of Mechanical Engineering, Purdue University Energy Saving Control of Hydraulic Systems Principle Investigator: Bin Yao Research Assistant: Song Liu School of Mechanical Engineering Purdue

Yao, Bin

95

Creation of an Engineered Geothermal System through Hydraulic and Thermal Stimulation  

Broader source: Energy.gov [DOE]

Project objectives: To create an Enhanced Geothermal System on the margin of the Cosofield through the hydraulic, thermal, and/or chemical stimulation of one or more tight injection wells; To increase the productivity of the Cosofield by 10 MWe; To develop and calibrate geomechanical, geochemical, and fluid flow models in order to extend the Coso/EGS concepts to wherever appropriate tectonic and thermal conditions apply.

96

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

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

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

97

A fundamental study on hybrid geothermal energy systems.  

E-Print Network [OSTI]

??Research Doctorate - Doctor of Philosophy (PhD) This thesis focuses on a fundamental study of hybrid geothermal energy systems, in which geothermal energy is hybridised (more)

Zhou, Cheng

2014-01-01T23:59:59.000Z

98

MHK Technologies/SMART Hybrid System | Open Energy Information  

Open Energy Info (EERE)

Application Technology Description Smart Hydro Power's hybrid system combines a micro hydro kinetic turbine with solar panels (and sometimes other sources) to provide...

99

Hybrid Molten Salt Reactor (HMSR): Method and System to fully...  

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

Hybrid Molten Salt Reactor (HMSR): Method and System to fully fission actinides for electric power production without fuel enrichment, fabrication, or reprocessing A method for...

100

Proton corebeam system in the expanding solar wind: Hybrid simulations  

E-Print Network [OSTI]

Proton corebeam system in the expanding solar wind: Hybrid simulations Petr Hellinger1,2 and Pavel. Trávnícek (2011), Proton corebeam system in the expanding solar wind: Hybrid simulations, J. Geophys. Res beamcore system in the solar wind are presented. The expansion with a strictly radial magnetic field leads

California at Berkeley, University of

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Improving efficiency of hybrid system simulation in Modelica  

Science Journals Connector (OSTI)

Modelica supports the modeling of hybrid systems by means of differential and algebraic equations, and discrete-events. The simulation of Modelica models is carried out by solving the continuous-time equations, detecting the occurrence of events and ... Keywords: Modelica, event iteration, hybrid system modeling, simulation performance

Victorino Sanz, Alfonso Urquia, Francesco Casella

2014-10-01T23:59:59.000Z

102

The Integration of an Electro-Hydraulic Manipulator Arm into a Self-Contained Mobile Delivery System  

SciTech Connect (OSTI)

The Portable Articulated Arm Deployment System (PAADS) is a remotely controlled vehicle for delivering a tele-operated electro-hydraulic manipulator arm to a field-deployable location. The self-contained system includes a boom vehicle with long reach capability, an electro-hydraulic manipulator arm, closed circuit television (CCTV) systems, and onboard tools. On board power systems consist of a self-contained, propane-fired 8-KW generator and an air compressor for pneumatic tools. The generator provides the power to run the air compressor as well as power to operate the 110-VAC auxiliary lighting system for the video cameras. The separate control console can be located up to 500 ft from the vehicle. PAADS is a fully integrated system, containing all equipment required to perform complex field operations. Hydraulic integration of the manipulator arm into the vehicle hydraulic drive system was necessary to eliminate the tether management of hoses, which extended vehicle operating range, minimized hydraulic pressure losses, and provided the opportunity to go to a radio frequency (RF) control system in the future, thereby eliminating the control cable. This paper presents the key decision points during system development. Emphasis is placed on ease of operator control and not on an intelligent machine approach. In addition, emphasis is placed on the philosophy of remote operation based on sound principles of integration.

M. Borland; S. M. Berry

1999-04-01T23:59:59.000Z

103

The Integration of an Electro-hydraulic Manipulator Arm into a Self-contained Mobile Delivery System  

SciTech Connect (OSTI)

The Portable Articulated Arm Deployment System (PAADS) is a remotely controlled vehicle for delivering a tele-operated electro-hydraulic manipulator arm to a field deployable location. The self-contained system includes a boom vehicle with long reach capability, an electro-hydraulic manipulator arm, closed circuit television (CCTV) systems, and onboard tools. On board power systems consist of a self contained, propane fired 8 KW generator and an air compressor for pneumatic tools. The generator provides the power to run the air compressor as well as provide power to operate the 110 VAC auxiliary lighting system for the video cameras. The separate control console can be located up to 500 ft from the vehicle. PAADS is a fully integrated system, containing all equipment required to perform complex field operations. Hydraulic integration of the manipulator arm into the vehicle hydraulic drive system was necessary to eliminate the tether management of hoses, which extended vehicle operating range, minimized hydraulic pressure losses, and provided the opportunity to go to a radio frequency (RF) control system in the future, thereby eliminating the control cable. This paper presents the key decision points during system development. Emphasis is placed on ease of operator control and not on an intelligent machine approach. In addition, emphasis is placed on the philosophy of remote operation based on sound principles on integration.

Borland, Mark Wilson; Berry, Stephen Michael

1999-04-01T23:59:59.000Z

104

Creation of an Enhanced Geothermal System through Hydraulic and Thermal Stimulation  

SciTech Connect (OSTI)

This report describes a 10-year DOE-funded project to design, characterize and create an Engineered Geothermal System (EGS) through a combination of hydraulic, thermal and chemical stimulation techniques. Volume 1 describes a four-year Phase 1 campaign, which focused on the east compartment of the Coso geothermal field. It includes a description of the geomechanical, geophysical, hydraulic, and geochemical studies that were conducted to characterize the reservoir in anticipation of the hydraulic stimulation experiment. Phase 1 ended prematurely when the drill bit intersected a very permeable fault zone during the redrilling of target stimulation well 34-9RD2. A hydraulic stimulation was inadvertently achieved, however, since the flow of drill mud from the well into the formation created an earthquake swarm near the wellbore that was recorded, located, analyzed and interpreted by project seismologists. Upon completion of Phase 1, the project shifted focus to a new target well, which was located within the southwest compartment of the Coso geothermal field. Volume 2 describes the Phase 2 studies on the geomechanical, geophysical, hydraulic, and geochemical aspects of the reservoir in and around target-stimulation well 46A-19RD, which is the deepest and hottest well ever drilled at Coso. Its total measured depth exceeding 12,000 ft. It spite of its great depth, this well is largely impermeable below a depth of about 9,000 ft, thus providing an excellent target for stimulation. In order to prepare 46A-19RD for stimulation, however, it was necessary to pull the slotted liner. This proved to be unachievable under the budget allocated by the Coso Operating Company partners, and this aspect of the project was abandoned, ending the program at Coso. The program then shifted to the EGS project at Desert Peak, which had a goal similar to the one at Coso of creating an EGS on the periphery of an existing geothermal reservoir. Volume 3 describes the activities that the Coso team contributed to the Desert Peak project, focusing largely on a geomechanical investigation of the Desert Peak reservoir, tracer testing between injectors 21-2 and 22-22 and the field???????¢????????????????s main producers, and the chemical stimulation of target well 27-15.

Rose, Peter Eugene [Energy and Geoscience Institute at the University of Utah

2013-04-15T23:59:59.000Z

105

Creation of an Enhanced Geothermal System through Hydraulic and Thermal Stimulation  

SciTech Connect (OSTI)

This report describes a 10-year DOE-funded project to design, characterize and create an Engineered Geothermal System (EGS) through a combination of hydraulic, thermal and chemical stimulation techniques. Volume 1 describes a four-year Phase 1 campaign, which focused on the east compartment of the Coso geothermal field. It includes a description of the geomechanical, geophysical, hydraulic, and geochemical studies that were conducted to characterize the reservoir in anticipation of the hydraulic stimulation experiment. Phase 1 ended prematurely when the drill bit intersected a very permeable fault zone during the redrilling of target stimulation well 34-9RD2. A hydraulic stimulation was inadvertently achieved, however, since the flow of drill mud from the well into the formation created an earthquake swarm near the wellbore that was recorded, located, analyzed and interpreted by project seismologists. Upon completion of Phase 1, the project shifted focus to a new target well, which was located within the southwest compartment of the Coso geothermal field. Volume 2 describes the Phase 2 studies on the geomechanical, geophysical, hydraulic, and geochemical aspects of the reservoir in and around target-stimulation well 46A-19RD, which is the deepest and hottest well ever drilled at Coso. Its total measured depth exceeding 12,000 ft. It spite of its great depth, this well is largely impermeable below a depth of about 9,000 ft, thus providing an excellent target for stimulation. In order to prepare 46A-19RD for stimulation, however, it was necessary to pull the slotted liner. This proved to be unachievable under the budget allocated by the Coso Operating Company partners, and this aspect of the project was abandoned, ending the program at Coso. The program then shifted to the EGS project at Desert Peak, which had a goal similar to the one at Coso of creating an EGS on the periphery of an existing geothermal reservoir. Volume 3 describes the activities that the Coso team contributed to the Desert Peak project, focusing largely on a geomechanical investigation of the Desert Peak reservoir, tracer testing between injectors 21-2 and 22-22 and the fieldâ??s main producers, and the chemical stimulation of target well 27-15.

Rose, Peter Eugene [Energy and Geoscience Institute at the Univerity of Utah

2013-04-15T23:59:59.000Z

106

PV-hybrid village power systems in Amazonia  

SciTech Connect (OSTI)

The Brazilian Amazon region is an ideal location for isolated mini-grid systems. Hundreds of diesel systems have been installed to supply electricity to this sparsely populated region. However, the availability of renewable energy resources makes the Amazon well-suited to renewable energy systems. This paper describes the technical aspects of two hybrid systems being installed in this region through the cooperative effort of multiple partners: US Department of Energy, through NREL, and Brazilian CEPEL/Eletrobras and state electric utilities. The first system is a 50-kW photovoltaic-wind-battery hybrid and the second is a 50-kW photovoltaic-diesel-battery hybrid.

Warner, C.L.; Taylor, R.W. [National Renewable Energy Lab., Golden, CO (United States); Ribeiro, C.M.; Moszkowicz, M.; Borba, A.J.V. [Centro de Pesquisas de Energia Eletrica, Rio de Janeiro (Brazil)

1996-09-01T23:59:59.000Z

107

Paper Number Sizing and Optimal Operation of a Power Split Hydraulic  

E-Print Network [OSTI]

operation becomes more complex. Drive train sizing and system operation in a power-split hybrid vehiclePaper Number Sizing and Optimal Operation of a Power Split Hydraulic Hybrid Drive Train Felicitas operation of a power-split drive train. A method for sizing components, and a modal operation in which

Li, Perry Y.

108

Can Future Emissions Limits be Met with a Hybrid EGR System Alone...  

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

Future Emissions Limits be Met with a Hybrid EGR System Alone? Can Future Emissions Limits be Met with a Hybrid EGR System Alone? Presents application of hybrid EGR system in terms...

109

E-Print Network 3.0 - affine hybrid systems Sample Search Results  

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

hybrid systems Search Powered by Explorit Topic List Advanced Search Sample search results for: affine hybrid systems Page: << < 1 2 3 4 5 > >> 1 Affine Hybrid Systems Aaron D....

110

Study on Electric Control System for a Full Hybrid Bus  

Science Journals Connector (OSTI)

For efficient and reliable operation of a novel hybrid powertrain assembled in the bus, a set of control strategy combined with the structural characteristics was researched. Based on the identification of the driver's intension, this paper presented ... Keywords: full hybrid bus, eletric control system, stretegy, fuel economy

Zhiguo Kong; Hongxiu Wang

2013-07-01T23:59:59.000Z

111

On Hybrid Systems and Closed-Loop MPC Systems A. Bemporad1  

E-Print Network [OSTI]

On Hybrid Systems and Closed-Loop MPC Systems A. Bemporad1 , W.P.M.H. Heemels2 , B. De Schutter3 Abstract The following five classes of hybrid systems were re- cently proved to be equivalent: linear- per, for linear or hybrid plants in closed-loop with a model predictive control (MPC) controller based

Sontag, Eduardo

112

Hybrid Vapor Compression Adsorption System: Thermal Storage Using Hybrid Vapor Compression Adsorption System  

SciTech Connect (OSTI)

HEATS Project: UTRC is developing a new climate-control system for EVs that uses a hybrid vapor compression adsorption system with thermal energy storage. The targeted, closed system will use energy during the battery-charging step to recharge the thermal storage, and it will use minimal power to provide cooling or heating to the cabin during a drive cycle. The team will use a unique approach of absorbing a refrigerant on a metal salt, which will create a lightweight, high-energy-density refrigerant. This unique working pair can operate indefinitely as a traditional vapor compression heat pump using electrical energy, if desired. The project will deliver a hot-and-cold battery that provides comfort to the passengers using minimal power, substantially extending the driving range of EVs.

None

2012-01-04T23:59:59.000Z

113

Downhole hydraulic seismic generator  

DOE Patents [OSTI]

A downhole hydraulic seismic generator system for transmitting energy wave vibrations into earth strata surrounding a borehole. The system contains an elongated, unitary housing operably connected to a well head aboveground by support and electrical cabling, and contains clamping apparatus for selectively clamping the housing to the walls of the borehole. The system further comprises a hydraulic oscillator containing a double-actuating piston whose movement is controlled by an electro-servovalve regulating a high pressure hydraulic fluid flow into and out of upper and lower chambers surrounding the piston. The spent hydraulic fluid from the hydraulic oscillator is stored and pumped back into the system to provide high pressure fluid for conducting another run at the same, or a different location within the borehole.

Gregory, Danny L. (Corrales, NM); Hardee, Harry C. (Albuquerque, NM); Smallwood, David O. (Albuquerque, NM)

1992-01-01T23:59:59.000Z

114

System Advisor Model Includes Analysis of Hybrid CSP Option ...  

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

Several novel concepts related to power generation have been missing in the System Advisor Model (SAM). One such concept, until now, is a hybrid integrated solar combined-cycle...

115

Control system design for a parallel hybrid electric vehicle  

E-Print Network [OSTI]

This thesis addresses the design of control systems for a parallel hybrid electric drive train which is an alternative to conventional passenger vehicles. The principle components of the drive train are a small internal combustion engine...

Buntin, David Leighton

1994-01-01T23:59:59.000Z

116

Optical design of organic solar cell with hybrid plasmonic system  

Science Journals Connector (OSTI)

We propose a novel optical design of organic solar cell with a hybrid plasmonic system, which comprises a plasmonic cavity coupled with a dielectric core-metal shell nanosphere. From a...

Sha, Wei E I; Choy, Wallace C H; Chen, Yongpin P; Chew, Weng Cho

2011-01-01T23:59:59.000Z

117

Ultracapacitor/Battery Hybrid Energy Storage Systems for Electric Vehicles.  

E-Print Network [OSTI]

??This thesis deals with the design of Hybrid Energy Storage System (HESS) for Light Electric Vehicles (LEV) and EVs. More specifically, a tri-mode high-efficiency non-isolated (more)

Moshirvaziri, Mazhar

2012-01-01T23:59:59.000Z

118

Hybrid computer simulation of atomic orbitals of one electron system  

E-Print Network [OSTI]

OF SCIENCE May 1998 Major Subject: Biomedical Engineering HYBRID COMPUER SIMULATION OF ATOMIC ORBITALS OF ONE ELECTRON SYSTEM A Thesis by PRABAKER BALASUBRAMANIUM Submitted to Texas ARM University in partial fulfillment of the requirements...

Balasubramanium, Prabaker

2012-06-07T23:59:59.000Z

119

Control Strategy for Wind and Solar Hybrid Generation System  

Science Journals Connector (OSTI)

Solar energy and wind energy are the two most viable renewable ... . This paper presents a control strategy for wind & solar hybrid power generating systems. If the power generation sources produce more ... strat...

Xin Gao

2011-01-01T23:59:59.000Z

120

Application of hybrid EGR systems to turbocharged GDI engines  

Science Journals Connector (OSTI)

In a hybrid exhaust gas recirculation system, high-pressure EGR is combined with low-pressure EGR. As BorgWarner demonstrates, proven technology from diesel engines can also be used for gasoline engines in ord...

David Roth; Rolf Sauerstein; Dr.-Ing. Michael Becker; Rob Meilinger

2010-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

The assessment of battery-ultracapacitor hybrid energy storage systems  

E-Print Network [OSTI]

Battery-ultracapacitors hybrid energy storage systems (ESS) could combine the high power density and high life cycle of ultracapacitors with the high energy density of batteries, which forms a promising energy storage ...

He, Yiou

2014-01-01T23:59:59.000Z

122

Utilization of a hybrid membrane system in olefin production  

SciTech Connect (OSTI)

Hybrid distillation with facilitated transport membranes has recently been investigated for the propane/propylene splitter, but the overall effect of such an alternative on the overall ethylene process has received only minimal consideration. This study has optimized the use of a hybrid C{sub 3} splitter in a base case ethylene unit from both a technical and an economical point of view. A comparison is made between the use of this hybrid system and the conventional separation system in today`s modern ethylene production plants. 6 refs., 6 figs., 1 tab.

Al-Rabiah, A.A.; Timmerhaus, K.D.; Noble, R.D. [Univ. of Colorado, Boulder, CO (United States)

1996-12-31T23:59:59.000Z

123

NREL: Vehicle Systems Analysis - Plug-In Hybrid Electric Vehicles  

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

Plug-In Hybrid Electric Vehicles Plug-In Hybrid Electric Vehicles NREL's vehicle systems analysts work to advance the technology of plug-in hybrid electric vehicles (PHEVs), also known as grid-connected or grid-charged hybrids. Technology Targets and Metrics Analysis We use our Technical Targets Tool to determine pathways for maximizing the potential national impact of plug-in hybrid electric vehicles. This assessment includes consideration of how consumers will value the new vehicle technology based on attributes such as: Acceleration Fuel economy and consumption Cargo capacity Cost. We use the resulting competitiveness index to predict the vehicle's market penetration rate. Then, we can create a total national benefits picture after adding in other factors such as: Existing fleet turnover

124

Dissipativity Theory for Hybrid Systems with Applications to Networked Control Systems.  

E-Print Network [OSTI]

?? This dissertation provides new results for energy-based analysis of systems modeled by switched or hybrid system models. This work is motivated by applications in (more)

McCourt, Michael J.

2015-01-01T23:59:59.000Z

125

Hybrid Geothermal Heat Pump System Research Geothermal Project | Open  

Open Energy Info (EERE)

Hybrid Geothermal Heat Pump System Research Geothermal Project Hybrid Geothermal Heat Pump System Research Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Hybrid Geothermal Heat Pump System Research Project Type / Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type / Topic 2 Topic Area 2: Data Gathering and Analysis Project Description Geothermal, or ground-source heat pump systems have been shown to have superior energy performance to conventional heating and cooling systems in many building types and climates. There has been significant growth in the application of these systems; yet, geothermal systems have only been able to capture a few percent of the heating and cooling market. This is due primarily to the prohibitively high cost of installing the necessary ground loop.

126

Analysis of advanced solar hybrid desiccant cooling systems for buildings  

SciTech Connect (OSTI)

This report describes an assessment of the energy savings possible from developing hybrid desiccant/vapor-compression air conditioning systems. Recent advances in dehumidifier design for solar desiccant cooling systems have resulted in a dehumidifier with a low pressure drop and high efficiency in heat and mass transfer. A recent study on hybrid desiccant/vapor compression systems showed a 30%-80% savings in resource energy when compared with the best conventional systems with vapor compression. A system consisting of a dehumidifier with vapor compression subsystems in series was found to be the simplest and best overall performer.

Schlepp, D.; Schultz, K.

1984-10-01T23:59:59.000Z

127

Energy-Efficient Building HVAC Control Using Hybrid System LBMPC  

E-Print Network [OSTI]

Improving the energy-efficiency of heating, ventilation, and air-conditioning (HVAC) systems has the potential to realize large economic and societal benefits. This paper concerns the system identification of a hybrid system model of a building-wide HVAC system and its subsequent control using a hybrid system formulation of learning-based model predictive control (LBMPC). Here, the learning refers to model updates to the hybrid system model that incorporate the heating effects due to occupancy, solar effects, outside air temperature (OAT), and equipment, in addition to integrator dynamics inherently present in low-level control. Though we make significant modeling simplifications, our corresponding controller that uses this model is able to experimentally achieve a large reduction in energy usage without any degradations in occupant comfort. It is in this way that we justify the modeling simplifications that we have made. We conclude by presenting results from experiments on our building HVAC testbed, which s...

Aswani, Anil; Taneja, Jay; Krioukov, Andrew; Culler, David; Tomlin, Claire

2012-01-01T23:59:59.000Z

128

Monte Carlo Simulation-based Sensitivity Analysis of the Model of a Thermal-Hydraulic Passive System  

E-Print Network [OSTI]

1 Monte Carlo Simulation-based Sensitivity Analysis of the Model of a Thermal-Hydraulic Passive, and for this reason are expected to improve the safety of nuclear power plants. However, uncertainties are present Engineering and System Safety 107 (2012) 90-106" DOI : 10.1016/j.ress.2011.08.006 #12;2 power plants because

Paris-Sud XI, Université de

129

Modeling of hybrid control systems using the \\{DEVSLib\\} Modelica library  

Science Journals Connector (OSTI)

\\{DEVSLib\\} is a free Modelica library, developed by the authors, that supports the Parallel DEVS formalism. The library is mainly designed to model discrete-event systems. It also includes interfaces to communicate the \\{DEVSLib\\} models with the rest of the Modelica libraries. Thus, the library can be used in the development of multi-domain and multi-formalism hybrid models using the object-oriented methodology supported by Modelica. This manuscript presents the hybrid system modeling capabilities included in DEVSLib. In particular, these functionalities are applied to the description of hybrid control systems. A case study of a supermarket refrigeration system, using the traditional control approach, is discussed. Three implementations of the plant and its controllers have been developed and are described. The system is simulated reproducing the day and night conditions, and the results from the three implementations are compared. \\{DEVSLib\\} is freely available for download at http://www.euclides.dia.uned.es.

Victorino Sanz; Alfonso Urquia; Franois E. Cellier; Sebastian Dormido

2012-01-01T23:59:59.000Z

130

ENSC 461 PROJECT: Development of a new hydraulic regenerative energy storage system  

E-Print Network [OSTI]

pressurized gas, typically nitrogen. In the regeneration mode, the compressed gas pushes the hydraulic fluid back into the low-pressure tank and generates electricity through the hydraulic pump/motor. The HRS in the acceleration mode. Following the recent increase in oil prices, the HRS technology has received considerable

Bahrami, Majid

131

Hybrid energy system cost analysis: San Nicolas Island, California  

SciTech Connect (OSTI)

This report analyzes the local wind resource and evaluates the costs and benefits of supplementing the current diesel-powered energy system on San Nicolas Island, California (SNI), with wind turbines. In Section 2.0 the SNI site, naval operations, and current energy system are described, as are the data collection and analysis procedures. Section 3.0 summarizes the wind resource data and analyses that were presented in NREL/TP 442-20231. Sections 4.0 and 5.0 present the conceptual design and cost analysis of a hybrid wind and diesel energy system on SNI, with conclusions following in Section 6. Appendix A presents summary pages of the hybrid system spreadsheet model, and Appendix B contains input and output files for the HYBRID2 program.

Olsen, T.L.; McKenna, E.

1996-07-01T23:59:59.000Z

132

Solid Oxide Fuel Cell Hybrid System for Distributed Power Generation  

SciTech Connect (OSTI)

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

Faress Rahman; Nguyen Minh

2004-01-04T23:59:59.000Z

133

Chapter 9 - Hydraulic Pumps  

Science Journals Connector (OSTI)

Publisher Summary This chapter provides an overview of hydraulic-powered downhole pumps, which are powered by a stream of high pressure power fluid supplied by a power fluid (PF) pump at the surface and sent to a downhole pump or pump engine. Hydraulic pumps are basically of two typespiston downhole pumps that are similar to beam down-hole pumps, and jet downhole pumps that reduce the pressure on the formation by high-speed power fluid flow through the throat of a venturi or jet pump nozzle-diffuser combination. Hydraulic pumps can be used to remove liquids from gas wells. A skid-mounted hydraulic pump can be used to kick off a gas well and then be moved to another well for testing, production, or longer term de-watering. Hydraulic pumping is generally not depth limited, and deviated or crooked wells do not present problems. Hydraulic reciprocating pumps can produce a low bottomhole pressure. A jet pump may require a fluid height over the pump of 20% of submergence. A jet pump is more trouble-free than a reciprocating hydraulic pump and can tolerate some solids in the production. Fairly high rates of more than several hundred bbls/day are possible. In general, hydraulic systems are not rate limited when removing liquids from gas wells.

James Lea; Henry Nickens; Michael Wells

2003-01-01T23:59:59.000Z

134

Hydrogen atom as a quantum-classical hybrid system  

E-Print Network [OSTI]

Hydrogen atom is studied as a quantum-classical hybrid system, where the proton is treated as a classical object while the electron is regarded as a quantum object. We use a well known mean-field approach to describe this hybrid hydrogen atom; the resulting dynamics for the electron and the proton is compared to their full quantum dynamics. The electron dynamics in the hybrid description is found to be only marginally different from its full quantum counterpart. The situation is very different for the proton: in the hybrid description, the proton behaves like a free particle; in the fully quantum description, the wave packet center of the proton orbits around the center of mass. Furthermore, we find that the failure to describe the proton dynamics properly can be regarded as a manifestation of the fact that there is no conservation of momentum in the mean-field hybrid approach. We expect that such a failure is a common feature for all existing approaches for quantum-classical hybrid systems of Born-Oppenheimer type.

Fei Zhan; Biao Wu

2013-02-15T23:59:59.000Z

135

Entanglement detection in hybrid optomechanical systems  

SciTech Connect (OSTI)

We study a device formed by a Bose-Einstein condensate (BEC) coupled to the field of a cavity with a moving end mirror and find a working point such that the mirror-light entanglement is reproduced by the BEC-light quantum correlations. This provides an experimentally viable tool for inferring mirror-light entanglement with only a limited set of assumptions. We prove the existence of tripartite entanglement in the hybrid device, persisting up to temperatures of a few milli-Kelvin, and discuss a scheme to detect it.

De Chiara, Gabriele [Fisica Teorica: Informacio i Fenomens Quantics, Universitat Autonoma de Barcelona, E-08193 Bellaterra (Spain); Paternostro, Mauro [Centre for Theoretical Atomic, Molecular and Optical Physics, School of Mathematics and Physics, Queen's University, Belfast BT7 1NN (United Kingdom); Palma, G. Massimo [NEST, Istituto Nanoscienze-CNR and Dipartimento di Fisica, Universita degli Studi di Palermo, Via Archirafi 36, I-90123 Palermo (Italy)

2011-05-15T23:59:59.000Z

136

Design and Assessment of a Battery-Supercapacitor Hybrid Energy Storage System for Remote Area Wind Power Systems.  

E-Print Network [OSTI]

??Recent advances in innovative energy storage devices such as supercapacitors have made battery-supercapacitor hybrid energy storage systems technically attractive. However the field of hybrid energy (more)

Gee, A

2012-01-01T23:59:59.000Z

137

HYBRID INVERSE PROBLEMS AND REDUNDANT SYSTEMS OF PARTIAL DIFFERENTIAL EQUATIONS  

E-Print Network [OSTI]

. The theory is applied to the case of power density measurements, which are internal functionals of the form from knowledge of said internal functionals. For recent books and reviews on hybrid inverse problems conditions. General theories of elliptic systems then allow us to construct a parametrix for such systems

Bal, Guillaume

138

Orbits of hybrid systems as qualitative indicators of quantum dynamics  

E-Print Network [OSTI]

Hamiltonian theory of hybrid quantum-classical systems is used to study dynamics of the classical subsystem coupled to different types of quantum systems. It is shown that the qualitative properties of orbits of the classical subsystem clearly indicate if the quantum subsystem does or does not have additional conserved observables.

N. Buric; D. B. Popovic; M. Radonjic; S. Prvanovic

2014-03-03T23:59:59.000Z

139

Simulation of IPA Gradients in Hybrid Network Systems Benjamin Melamed  

E-Print Network [OSTI]

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

140

APPLICATIONS OF HYBRID GROUND SOURCE HEAT PUMP SYSTEMS TO  

E-Print Network [OSTI]

APPLICATIONS OF HYBRID GROUND SOURCE HEAT PUMP SYSTEMS TO BUILDINGS AND BRIDGE DECKS. By MAHADEVAN PUMP SYSTEMS TO BUILDINGS AND BRIDGE DECKS. Thesis Approved cannot find enough words to thank my father, H. Ramamoorthy, my mother, R. Devasena, and my brother

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Aircraft AC Generators: Hybrid System Modeling and Simulation  

E-Print Network [OSTI]

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

Koutsoukos, Xenofon D.

142

Electron-State Hybridization in Heavy-Fermion Systems  

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

Electron-State Hybridization in Electron-State Hybridization in Heavy-Fermion Systems Electron-State Hybridization in Heavy-Fermion Systems Print Wednesday, 27 September 2006 00:00 Heavy-fermion systems are characterized by electrons with extremely large effective masses. The corresponding heavy-electron "quasiparticle" states are close to the Fermi energy and govern the thermodynamic, transport, and, in part, magnetic properties of these materials. In the case of rare-earth compounds, the quasiparticle states arise from the interactions (hybridization) of valence states with strongly localized 4f states. The question as to whether it is sufficient to treat the f states as localized impurities (single-impurity Anderson model) or whether the periodic crystal symmetry must be considered (periodic Anderson model) has been the subject of extensive debate. An international team of researchers from Germany, Ukraine, India, and the U.S. has performed angle-resolved photoemission spectroscopy (ARPES) studies of the heavy-fermion system YbIr2Si2. The results show a strong momentum (directional) dependence of the hybridization that clearly rules out the single-impurity model in favor of the lattice model.

143

Multi-storage Hybrid System Approach and Experimental Investigations  

Science Journals Connector (OSTI)

Abstract The paper presents a new multi-storage hybrid system concept for the improvement of self-consumption rate, conversion efficiency and storage lifetime in photovoltaic (PV) hybrid systems. Main idea is the smart combination and control of short- and long-term storage technologies with supplementary operating characteristics. The paper discusses a typical application example of a PV-hybrid system with lithium-ion battery, hydrogen and heat storage path. A dynamic lithium-ion battery model is presented. The power electronic and control structure of the multi-storage experimental test-bed is explained. Investigation results for a typical application example demonstrate the functionality and benefits of the proposed concept.

Thilo Bocklisch; Michael Bttiger; Martin Paulitschke

2014-01-01T23:59:59.000Z

144

Languages and tools for hybrid systems design  

Science Journals Connector (OSTI)

The explosive growth of embedded electronics is bringing information and control systems of increasing complexity to every aspects of our lives. The most challenging designs are safety-critical systems, such as transportation systems (e.g., airplanes, ...

Luca P. Carloni; Roberto Passerone; Alessandro Pinto; Alberto L. Angiovanni-Vincentelli

2006-01-01T23:59:59.000Z

145

Application of Modelica/MWorks on modeling, simulation and optimization for electro-hydraulic servo valve system  

Science Journals Connector (OSTI)

Electro-hydraulic servo valve is a typical complicated multi-domain system constituted by mechanical electric hydraulic and magnetic components which is widely used in electro-hydraulic servo systems such as construction machinery heavy equipment weapon and so forth. The traditional method of modeling and simulation of servo valve is based on block diagram or signal flow which cannot describe the servo valve system from components level nor be used in modeling and simulation of overall servo systems. In the procedure of traditional method computational causality must be involved in modeling of servo valve which is inconvenient to execute modification on components or parameters. Modelica is an object-oriented modeling language which is suited for large complex heterogeneous and multi-domain systems. The key features of Modelica are multi-domain object-oriented and non-causal which are suitable for modeling of servo valve and make the model readable reusable and easy to modify. The simulation results show similar curves with traditional method. This new servo valve modeling and simulation method can provide the engineers a more efficient way to design and optimize a servo valve and an overall servo system.

Ming Li; Guang Meng; Jianping Jing; Jinyang Liu; Zuoyang Zhong

2012-01-01T23:59:59.000Z

146

Hybrid approach to failure prediction for advanced computing systems |  

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

Hybrid approach to failure prediction for advanced computing systems Hybrid approach to failure prediction for advanced computing systems January 8, 2014 Tweet EmailPrint "Fault tolerance is no longer an option but a necessity," states Franck Cappello, project manager of research on resilience at the extreme scale at Argonne National Laboratory. "And the ability to reliably predict failures can significantly reduce the overhead of fault-tolerance strategies and the recovery cost." In a special issue article in the International Journal of High Performance Computing Applications, Cappello and his colleagues at Argonne and the University of Illinois at Urbana-Champaign (UIUC) discuss issues in failure prediction and present a new hybrid approach to overcome the limitations of current models. One popular way of building prediction models is to analyze log files,

147

Hybrid sodium heat pipe receivers for dish/Stirling systems  

SciTech Connect (OSTI)

The design of a hybrid solar/gas heat pipe receiver for the SBP 9 kW dish/Stirling system using a United Stirling AB V160 Stirling engine and the results of on-sun testing in alternative and parallel mode will be reported. The receiver is designed to transfer a thermal power of 35 kW. The heat pipe operates at around 800 C, working fluid is sodium. Operational options are solar-only, gas augmented and gas-only mode. Also the design of a second generation hybrid heat pipe receiver currently developed under a EU-funded project, based on the experience gained with the first hybrid receiver, will be reported. This receiver is designed for the improved SPB/L. and C.-10 kW dish/Stirling system with the reworked SOLO V161 Stirling engine.

Laing, D.; Reusch, M. [Deutsche Forschungsanstalt fuer Luft- und Raumfahrt e.V., Stuttgart (Germany). Inst. fuer Technische Thermodynamik

1997-12-31T23:59:59.000Z

148

Hydraulic manipulator research at ORNL  

SciTech Connect (OSTI)

Recently, task requirements have dictated that manipulator payload capacity increase to accommodate greater payloads, greater manipulator length, and larger environmental interaction forces. General tasks such as waste storage tank cleanup and facility dismantlement and decommissioning require manipulator life capacities in the range of hundreds of pounds rather than tens of pounds. To meet the increased payload capacities demanded by present-day tasks, manipulator designers have turned once again to hydraulics as a means of actuation. In order to successfully design, build, and deploy a new hydraulic manipulator (or subsystem), sophisticated modeling, analysis, and control experiments are usually needed. Oak Ridge National Laboratory (ORNL) has a history of projects that incorporate hydraulics technology, including mobile robots, teleoperated manipulators, and full-scale construction equipment. In addition, to support the development and deployment of new hydraulic manipulators, ORNL has outfitted a significant experimental laboratory and has developed the software capability for research into hydraulic manipulators, hydraulic actuators, hydraulic systems, modeling of hydraulic systems, and hydraulic controls. The purpose of this article is to describe the past hydraulic manipulator developments and current hydraulic manipulator research capabilities at ORNL. Included are example experimental results from ORNL`s flexible/prismatic test stand.

Kress, R.L.; Jansen, J.F. [Oak Ridge National Lab., TN (United States); Love, L.J. [Oak Ridge Inst. for Science and Education, TN (United States)

1997-03-01T23:59:59.000Z

149

Hydraulic Fracturing (Vermont)  

Broader source: Energy.gov [DOE]

Vermont prohibits hydraulic fracturing or the collection, storage, or treatment of wastewater from hydraulic fracturing

150

Electron-State Hybridization in Heavy-Fermion Systems  

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

Electron-State Hybridization in Heavy-Fermion Systems Print Electron-State Hybridization in Heavy-Fermion Systems Print Heavy-fermion systems are characterized by electrons with extremely large effective masses. The corresponding heavy-electron "quasiparticle" states are close to the Fermi energy and govern the thermodynamic, transport, and, in part, magnetic properties of these materials. In the case of rare-earth compounds, the quasiparticle states arise from the interactions (hybridization) of valence states with strongly localized 4f states. The question as to whether it is sufficient to treat the f states as localized impurities (single-impurity Anderson model) or whether the periodic crystal symmetry must be considered (periodic Anderson model) has been the subject of extensive debate. An international team of researchers from Germany, Ukraine, India, and the U.S. has performed angle-resolved photoemission spectroscopy (ARPES) studies of the heavy-fermion system YbIr2Si2. The results show a strong momentum (directional) dependence of the hybridization that clearly rules out the single-impurity model in favor of the lattice model.

151

Electron-State Hybridization in Heavy-Fermion Systems  

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

Electron-State Hybridization in Heavy-Fermion Systems Print Electron-State Hybridization in Heavy-Fermion Systems Print Heavy-fermion systems are characterized by electrons with extremely large effective masses. The corresponding heavy-electron "quasiparticle" states are close to the Fermi energy and govern the thermodynamic, transport, and, in part, magnetic properties of these materials. In the case of rare-earth compounds, the quasiparticle states arise from the interactions (hybridization) of valence states with strongly localized 4f states. The question as to whether it is sufficient to treat the f states as localized impurities (single-impurity Anderson model) or whether the periodic crystal symmetry must be considered (periodic Anderson model) has been the subject of extensive debate. An international team of researchers from Germany, Ukraine, India, and the U.S. has performed angle-resolved photoemission spectroscopy (ARPES) studies of the heavy-fermion system YbIr2Si2. The results show a strong momentum (directional) dependence of the hybridization that clearly rules out the single-impurity model in favor of the lattice model.

152

Comparison of four procedures for the identification of hybrid systems  

E-Print Network [OSTI]

Comparison of four procedures for the identification of hybrid systems A.Lj. Juloski1 , W.niessen@nyquist.com Abstract. In this paper we compare four recently proposed procedures for the identification of PieceWise AutoRegressive eXogenous (PWARX) and switched ARX models. We consider the clustering-based procedure

153

On the Fokker-Planck Equation for Stochastic Hybrid Systems  

E-Print Network [OSTI]

On the Fokker-Planck Equation for Stochastic Hybrid Systems: Application to a Wind Turbine Model- speed wind turbine, with a switching controller that combines stall regulation and pitch control FPE is stated. Then the theory is applied to a variable-speed wind turbine model, yielding

Boyer, Edmond

154

Borazine-boron nitride hybrid hydrogen storage system  

DOE Patents [OSTI]

A hybrid hydrogen storage composition includes a first phase and a second phase adsorbed on the first phase, the first phase including BN for storing hydrogen by physisorption and the second phase including a borazane-borazine system for storing hydrogen in combined form as a hydride.

Narula, Chaitanya K. (Knoxville, TN) [Knoxville, TN; Simonson, J. Michael (Knoxville, TN) [Knoxville, TN; Maya, Leon (Knoxville, TN) [Knoxville, TN; Paine, Robert T. (Albuquerque, NM) [Albuquerque, NM

2008-04-22T23:59:59.000Z

155

Study on the Wind and Solar Hybrid Control System  

Science Journals Connector (OSTI)

In the Twelfth Five-Year Plan, a comprehensive layout has been made for the new energy industry as the representative of nuclear energy, wind, solar and so on in the future. The comprehensive utilization of renewable energy for sustainable development ... Keywords: Wind and Solar Hybrid, control system, Pulse width modulation, BOOST

Hua-wei Zhang; Nan Li

2012-12-01T23:59:59.000Z

156

Electron-State Hybridization in Heavy-Fermion Systems  

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

Electron-State Hybridization in Heavy-Fermion Systems Print Electron-State Hybridization in Heavy-Fermion Systems Print Heavy-fermion systems are characterized by electrons with extremely large effective masses. The corresponding heavy-electron "quasiparticle" states are close to the Fermi energy and govern the thermodynamic, transport, and, in part, magnetic properties of these materials. In the case of rare-earth compounds, the quasiparticle states arise from the interactions (hybridization) of valence states with strongly localized 4f states. The question as to whether it is sufficient to treat the f states as localized impurities (single-impurity Anderson model) or whether the periodic crystal symmetry must be considered (periodic Anderson model) has been the subject of extensive debate. An international team of researchers from Germany, Ukraine, India, and the U.S. has performed angle-resolved photoemission spectroscopy (ARPES) studies of the heavy-fermion system YbIr2Si2. The results show a strong momentum (directional) dependence of the hybridization that clearly rules out the single-impurity model in favor of the lattice model.

157

RETRAN-02: A program for transient thermal-hydraulic analysis of complex fluid flow systems: Volume 5, Modeling guidelines: Computer code manual  

SciTech Connect (OSTI)

RETRAN is a computer code designed to perform overall system response analyses of reactor power plants. The RETRAN code uses plant geometry, initial thermal-hydraulic states, component data, control function descriptions, and physics data as input to calculate the overall plant system thermal-hydraulic response during a transient. Where additional detail is required, the overall system response calculated by RETRAN can be used as a boundary condition for the detailed analysis.

Harrison, J.F.; Farman, R.F.; Peterson, C.E.; Jensen, P.J.

1987-11-01T23:59:59.000Z

158

Nuclear-renewable hybrid energy systems: Opportunities, interconnections, and needs  

SciTech Connect (OSTI)

As the U.S. energy system evolves, the amount of electricity from variable-generation sources is likely to increase, which could result in additional times when electricity demand is lower than available production. Thus, purveyors of technologies that traditionally have provided base-load electricitysuch as nuclear power plantscan explore new operating procedures to deal with the associated market signals. Concurrently, innovations in nuclear reactor design coupled with sophisticated control systems now allow for more complex apportionment of heat within an integrated system such as one linked to energy-intensive chemical processes. This paper explores one opportunity nuclear-renewable hybrid energy systems. These are defined as integrated facilities comprised of nuclear reactors, renewable energy generation, and industrial processes that can simultaneously address the need for grid flexibility, greenhouse gas emission reductions, and optimal use of investment capital. Six aspects of interaction (interconnections) between elements of nuclear-renewable hybrid energy systems are identified: Thermal, electrical, chemical, hydrogen, mechanical, and information. Additionally, system-level aspects affect selection, design, and operation of this hybrid system type. Throughout the paper, gaps and research needs are identified to promote further exploration of the topic.

Mark F. Ruth; Owen R. Zinaman; Mark Antkowiak; Richard D. Boardman; Robert S. Cherry; Morgan D. Bazilian

2014-02-01T23:59:59.000Z

159

Solid Oxide Fuel Cell Hybrid System for Distributed Power Generation  

SciTech Connect (OSTI)

This report summarizes the work performed by Honeywell during the January 2002 to March 2002 reporting period under Cooperative Agreement DE-FC26-01NT40779 for the U. S. Department of Energy, National Energy Technology Laboratory (DOE/NETL) entitled ''Solid Oxide Fuel Cell Hybrid System for Distributed Power Generation''. The main objective of this project is to develop and demonstrate the feasibility of a highly efficient hybrid system integrating a planar Solid Oxide Fuel Cell (SOFC) and a turbogenerator. For this reporting period the following activities have been carried out: {lg_bullet} Conceptual system design trade studies were performed {lg_bullet} System-level performance model was created {lg_bullet} Dynamic control models are being developed {lg_bullet} Mechanical properties of candidate heat exchanger materials were investigated {lg_bullet} SOFC performance mapping as a function of flow rate and pressure was completed

Nguyen Minh

2002-03-31T23:59:59.000Z

160

Nuclear Hybrid Energy Systems: Molten Salt Energy Storage  

SciTech Connect (OSTI)

With growing concerns in the production of reliable energy sources, the next generation in reliable power generation, hybrid energy systems, are being developed to stabilize these growing energy needs. The hybrid energy system incorporates multiple inputs and multiple outputs. The vitality and efficiency of these systems resides in the energy storage application. Energy storage is necessary for grid stabilizing and storing the overproduction of energy to meet peak demands of energy at the time of need. With high thermal energy production of the primary nuclear heat generation source, molten salt energy storage is an intriguing option because of its distinct properties. This paper will discuss the different energy storage options with the criteria for efficient energy storage set forth, and will primarily focus on different molten salt energy storage system options through a thermodynamic analysis

P. Sabharwall; M. Green; S.J. Yoon; S.M. Bragg-Sitton; C. Stoots

2014-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Battery control system for hybrid vehicle and method for controlling a hybrid vehicle battery  

DOE Patents [OSTI]

A battery control system for controlling a state of charge of a hybrid vehicle battery includes a detecting arrangement for determining a vehicle operating state or an intended vehicle operating state and a controller for setting a target state of charge level of the battery based on the vehicle operating state or the intended vehicle operating state. The controller is operable to set a target state of charge level at a first level during a mobile vehicle operating state and at a second level during a stationary vehicle operating state or in anticipation of the vehicle operating in the stationary vehicle operating state. The invention further includes a method for controlling a state of charge of a hybrid vehicle battery.

Bockelmann, Thomas R. (Battle Creek, MI); Beaty, Kevin D. (Kalamazoo, MI); Zou, Zhanijang (Battle Creek, MI); Kang, Xiaosong (Battle Creek, MI)

2009-07-21T23:59:59.000Z

162

Method and apparatus for controlling hybrid powertrain system in response to engine temperature  

DOE Patents [OSTI]

A method for controlling a hybrid powertrain system including an internal combustion engine includes controlling operation of the hybrid powertrain system in response to a preferred minimum coolant temperature trajectory for the internal combustion engine.

Martini, Ryan D; Spohn, Brian L; Lehmen, Allen J; Cerbolles, Teresa L

2014-10-07T23:59:59.000Z

163

Optimal Sizing Design for Hybrid Renewable Energy Systems in Rural Areas  

Science Journals Connector (OSTI)

Small-sized hybrid wind-hydro-solar power generation systems may be designed to solve the power ... Optimal design models are developed to design the hybrid generation systems including battery banks and to provi...

Yu Fu; Jianhua Yang; Tingting Zuo

2011-01-01T23:59:59.000Z

164

Hybrid Offshore Wind and Tidal Turbine Power System to Compensate for Fluctuation (HOTCF)  

Science Journals Connector (OSTI)

The hybrid system proposed in this study involves an offshore-wind turbine and a complementary tidal turbine that supplies grid power. The hybrid windtidal system consistently combines wind power and tidal power...

Mohammad Lutfur Rahman; Shunsuke Oka; Yasuyuki Shirai

2011-01-01T23:59:59.000Z

165

Experiences from the Roadrunner petascale hybrid systems  

SciTech Connect (OSTI)

The combination of flexible microprocessors (AMD Opterons) with high-performing accelerators (IBM PowerXCell 8i) resulted in the extremely powerful Roadrunner system. Many challenges in both hardware and software were overcome to achieve its goals. In this talk we detail some of the experiences in achieving performance on the Roadrunner system. In particular we examine several implementations of the kernel application, Sweep3D, using a work-queue approach, a more portable Thread-building-blocks approach, and an MPI on the accelerator approach.

Kerbyson, Darren J [Los Alamos National Laboratory; Pakin, Scott [Los Alamos National Laboratory; Lang, Mike [Los Alamos National Laboratory; Sancho Pitarch, Jose C [Los Alamos National Laboratory; Davis, Kei [Los Alamos National Laboratory; Barker, Kevin J [Los Alamos National Laboratory; Peraza, Josh [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

166

Neural Network Based Energy Storage System Modeling for Hybrid Electric Vehicles  

SciTech Connect (OSTI)

Demonstrates the application of an artificial neural network (ANN) for modeling the energy storage system of a hybrid electric vehicle.

Bhatikar, S. R.; Mahajan, R. L.; Wipke, K.; Johnson, V.

1999-08-01T23:59:59.000Z

167

Energy Storage System Considerations for Grid-Charged Hybrid Electric Vehicles (Presentation)  

SciTech Connect (OSTI)

Provides an overview of a study regarding energy storage system considerations for a plug-in hybrid electric vehicle.

Markel, T.; Simpson, A.

2005-09-01T23:59:59.000Z

168

SOLID OXIDE FUEL CELL HYBRID SYSTEM FOR DISTRIBUTED POWER GENERATION  

SciTech Connect (OSTI)

This report summarizes the work performed by Honeywell during the July 2001 to September 2001 reporting period under Cooperative Agreement DE-FC26-01NT40779 for the U. S. Department of Energy, National Energy Technology Laboratory (DOE/NETL) entitled ''Solid Oxide Fuel Cell Hybrid System for Distributed Power Generation''. The main objective of this project is to develop and demonstrate the feasibility of a highly efficient hybrid system integrating a planar Solid Oxide Fuel Cell (SOFC) and a turbogenerator. An internal program kickoff was held at Honeywell in Torrance, CA. The program structure was outlined and the overall technical approach for the program was presented to the team members. Detail program schedules were developed and detailed objectives were defined. Initial work has begun on the system design and pressurized SOFC operation.

Unknown

2002-03-01T23:59:59.000Z

169

Popularity Adaptive Search in Hybrid P2P Systems Xiaoqiu Shi  

E-Print Network [OSTI]

Popularity Adaptive Search in Hybrid P2P Systems Xiaoqiu Shi , Jinsong Han , Yunhao Liu Bay, Kowloon, Hong Kong {jasonhan, liu, ni}@cse.ust.hk Abstract In a hybrid peer-to-peer (P2P) system for Hybrid (PASH) P2P systems. By dynamically detecting the content popularity, PASH properly selects search

Liu, Yunhao

170

Control of a Hydraulically-Powered Positioning System Project Report, Part 2  

E-Print Network [OSTI]

is the volumetric flow rate, and the valve coefficient K=13. A Taylor series expansion is used to linearized. Also, the valve coefficient has been estimated with manufacturer data. The direction of the mass A volumetric pump is used in conjunction with a directional (spool) valve and a double- acting hydraulic

171

COST EFFECTIVE SIMULATION OF THE HYBRID SOLAR/WIND AND DIESEL ENERGY SYSTEM IN RURAL AREA  

Science Journals Connector (OSTI)

This paper describes the optimization of a hybrid energy system model. Currently in Sarawak people living in the rural areas still depend on diesel generators to generate electricity. This increases the demand for fossil fuel creates noise pollution and toxic gas is emitted to the environment. Hence hybrid energy systems were introduced to replace this conventional energy system as well as improving the living standard in the villages. In this paper several hybrid energy system configurations were investigated in order to find out the most cost effective hybrid system through Hybrid Optimization Model for Electric Renewability (Homer) software. Homer simulates optimizes and analyzes the sensitivity variables for each of the system configurations.

Ee. Y. Sim; Nader Barsoum

2008-01-01T23:59:59.000Z

172

Lyapunov-based hybrid loops for stability and performance of continuous-time control systems  

Science Journals Connector (OSTI)

We construct hybrid loops that augment continuous-time control systems. We consider a continuous-time nonlinear plant in feedback with a (possibly non stabilizing) given nonlinear dynamic continuous-time state feedback controller. The arising hybrid ... Keywords: Asymptotic controllability, Detectability, Hybrid systems, Lyapunov methods, Performance, Reset controllers

Christophe Prieur; Sophie Tarbouriech; Luca Zaccarian

2013-02-01T23:59:59.000Z

173

US Energy Initiatives Corp formerly Hybrid Fuel Systems Inc | Open Energy  

Open Energy Info (EERE)

US Energy Initiatives Corp formerly Hybrid Fuel Systems Inc US Energy Initiatives Corp formerly Hybrid Fuel Systems Inc Jump to: navigation, search Name US Energy Initiatives Corp (formerly Hybrid Fuel Systems Inc) Place Tampa, Florida Zip 33637 Product Holds patented natural gas/diesel dual fuel technology. References US Energy Initiatives Corp (formerly Hybrid Fuel Systems Inc)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. US Energy Initiatives Corp (formerly Hybrid Fuel Systems Inc) is a company located in Tampa, Florida . References ↑ "US Energy Initiatives Corp (formerly Hybrid Fuel Systems Inc)" Retrieved from "http://en.openei.org/w/index.php?title=US_Energy_Initiatives_Corp_formerly_Hybrid_Fuel_Systems_Inc&oldid=352601"

174

Hybrid Plasma Reactor/Filter for Transportable Collective Protection Systems  

SciTech Connect (OSTI)

Pacific Northwest National Laboratory (PNNL) has performed an assessment of a Hybrid Plasma/Filter system as an alternative to conventional methods for collective protection. The key premise of the hybrid system is to couple a nonthermal plasma (NTP) reactor with reactive adsorption to provide a broader envelope of protection than can be provided through a single-solution approach. The first step uses highly reactive species (e.g. oxygen radicals, hydroxyl radicals, etc.) created in a nonthermal plasma (NTP) reactor to destroy the majority (~75% - 90%) of an incoming threat. Following the NTP reactor an O3 reactor/filter uses the O3 created in the NTP reactor to further destroy the remaining organic materials. This report summarizes the laboratory development of the Hybrid Plasma Reactor/Filter to protect against a worst-case simulant, methyl bromide (CH3Br), and presents a preliminary engineering assessment of the technology to Joint Expeditionary Collective Protection performance specifications for chemical vapor air purification technologies.

Josephson, Gary B.; Tonkyn, Russell G.; Frye, J. G.; Riley, Brian J.; Rappe, Kenneth G.

2011-04-06T23:59:59.000Z

175

Model for the hybridization effect in disordered systems  

Science Journals Connector (OSTI)

Within a tight-binding formalism, we present a Bethe-lattice-type approximation which can be applied to the whole Hamiltonian or to a hybridization part only and which is expected to be valid in disordered systems like liquids. In the first case, it gives simple scalar equations for the calculation of the densities of states and has been applied successfully to some transition-metal alloys. In the second case, it can be used to study the sp-d hybridization. We predict a Fano effect on the sp density of states which can lead to the creation of a pseudogap at the top of the d band. We recover an expression for the sp self-energy which is the basis for an explanation of positive Hall coefficients in amorphous transition metals and also implies the well-known s-d resistivity proportional to the d density of states at the Fermi level.

D. Mayou; D. Nguyen-Manh; A. Pasturel; F. Cyrot-Lackmann

1986-03-01T23:59:59.000Z

176

Chapter 9 - Hydraulic pumping  

Science Journals Connector (OSTI)

Publisher Summary The hydraulic pumping system takes liquid (water or oil) from a liquid reservoir on the surface, puts it through a reciprocating multiplex piston pump or horizontal electrical submersible pump to increase the pressure, and then injects the pressurized liquid (power fluid) down-hole through a tubing string. At the bottom of the injection tubing string, the power fluid is directed into the nozzle of a jet pump or to the hydraulic engine of a piston pump, both of which have been set well below the producing fluid level. The surface injection pressures normally range from approximately 2000 psi up to 4000 psi, with some going up to but rarely above 4500 psi. An electric motor, diesel engine, or gas engine is used to drive the multiplex pump. The fundamental operating principle of subsurface hydraulic pumps is Pascal's Law, postulated by Blaise Pascal in 1653. This principle makes it possible to transmit pressure from the surface by means of a liquid-filled tubing string to any given point below the surface. The chapter further highlights applications to dewatering wells-gas and coal bed methane, limitations of other forms of lift, advantages of hydraulic pumping, disadvantages of hydraulic pumping, and different types of operating systems.

James F. Lea; Henry V. Nickens; Mike R. Wells

2008-01-01T23:59:59.000Z

177

A novel parallelization technique for DEVS simulation of continuous and hybrid systems  

Science Journals Connector (OSTI)

In this paper, we introduce a novel parallelization technique for Discrete Event System Specification (DEVS) simulation of continuous and hybrid systems. Here, like in most parallel discrete event simulation methodologies, the models are first split ... Keywords: QSS, discrete event systems, hybrid systems, parallel simulation, real-time systems

Federico Bergero; Ernesto Kofman; Franois Cellier

2013-06-01T23:59:59.000Z

178

Hybrid Energy  

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

Hybrid Energy Integrated energy systems could improve fossil resource utilization, reduce greenhouse gas emissions and stabilize renewable energy contributions. These hybrid...

179

MHK Technologies/Hybrid System | Open Energy Information  

Open Energy Info (EERE)

System System < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Hybrid System.jpg Technology Profile Primary Organization Ryokuseisha Corporation Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description To take advantage of wave power and solar power to provide a stable power source a Wave Activated Generator was combined with a solar battery In stormy the wave activated generator is used and in fair weather solar battery is used to provide a power supply with a high output This is used as the power source for measuring instruments on the islands off the power source for measuring instruments on the islands off the southernmost coast of Japan and for the buoy of the United States Coast Guard and TRINITY HOUSE LIGHTHOUSES SERVICE

180

Design of Electric or Hybrid vehicle alert sound system for pedestrian  

E-Print Network [OSTI]

Design of Electric or Hybrid vehicle alert sound system for pedestrian J.-C. Chamard and V, France 1691 #12;The arrival of fully or hybrid electric vehicles raised safety problems respect the environment to warn of his approach. However, hybrid and electric vehicles can potentially be dangerous

Boyer, Edmond

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Adaptive hybrid optimal quantum control for imprecisely characterized systems  

E-Print Network [OSTI]

Optimal quantum control theory carries a huge promise for quantum technology. Its experimental application, however, is often hindered by imprecise knowledge of the its input variables, the quantum system's parameters. We show how to overcome this by Adaptive Hybrid Optimal Control (Ad-HOC). This protocol combines open- and closed-loop optimal by first performing a gradient search towards a near-optimal control pulse and then an experimental fidelity measure with a gradient-free method. For typical settings in solid-state quantum information processing, Ad-Hoc enhances gate fidelities by an order of magnitude hence making optimal control theory applicable and useful.

D. J. Egger; F. K. Wilhelm

2014-02-28T23:59:59.000Z

182

Optimization of a hybrid solar energy collector system  

E-Print Network [OSTI]

OPTIMIZATION OF A HYBRID SOLAR ENERGY COLLECTOR SYSTEM A Thesis by ALAN M. SHI NEMAN Submitted to the Graduate College of Texas A&N University in partial fulfillment of the requirement for the degree MASTER OF SCIENCE May 1981 Major Subject...: Mechanical Engineering THE STRUCTURAL IMPACT OF COMMODITY FARM PROGRAMS ON FARMS IN THE SOUTHERN TEXAS HIGH PLAINS A Thesis by CHRISTINA KAY SHIRLEY Submitted to the Graduate College of Texas A&M University in par'tial fulfillment of the requirement...

Shinkman, Alan M.

1981-01-01T23:59:59.000Z

183

Separation of concerns in hybrid component and agent systems  

Science Journals Connector (OSTI)

This paper discusses the Socially Situated Agent Architecture (SoSAA) a complete construction methodology that leverages existing well-established research and associated methodologies and frameworks in both the agent-oriented and component-based software engineering domains. As a software framework, SoSAA is intended to serve as a foundation on which to build agent-based applications by promoting separation of concerns in the development of open, heterogeneous, adaptive and distributed systems. The paper highlights concerns typically addressed in the development of distributed systems, such as adaptation, concurrency and fault-tolerance. It analyses how a hybrid agent/component integration approach can improve the separation of these concerns by leveraging modularity constructs already available in agent and component systems. Finally, it provides a first evaluation of the framework's application by applying well-known metrics to a distributed information retrieval case study, and by discussing how these results can be projected to a typical multi-agent application developed with this hybrid approach.

Mauro Dragone; Howell Jordan; David Lillis; Rem W. Collier

2011-01-01T23:59:59.000Z

184

Hybrid system modeling using the \\{SIMANLib\\} and \\{ARENALib\\} Modelica libraries  

Science Journals Connector (OSTI)

Abstract The \\{ARENALib\\} and \\{SIMANLib\\} Modelica libraries replicate the basic functionality of the Arena simulation environment and the SIMAN language. These libraries facilitate describing discrete-event models using the Arena modeling methodology. \\{ARENALib\\} and \\{SIMANLib\\} models can be combined with other Modelica models in order to describe complex hybrid systems (i.e., combined continuous-time and discrete-event systems). The implementation and design of \\{SIMANLib\\} and \\{ARENALib\\} is discussed. The \\{ARENALib\\} components have been built in a modular fashion using SIMANLib. The \\{SIMANLib\\} components have been described as Parallel DEVS models and implemented using DEVSLib, a Modelica library previously developed by the authors to support the Parallel DEVS formalism. The use of Parallel DEVS as underlying mathematical formalism has facilitated the development and maintenance of SIMANLib. The modeling of two hybrid systems is discussed to illustrate the features and use of \\{SIMANLib\\} and ARENALib: firstly, a soaking-pit furnace; secondly, the malaria spread and an emergency hospital. DEVSLib, \\{SIMANLib\\} and \\{ARENALib\\} can be freely downloaded from http://www.euclides.dia.uned.es/.

Victorino Sanz; Alfonso Urquia; Franois E. Cellier; Sebastian Dormido

2013-01-01T23:59:59.000Z

185

Optimal control of a hybrid production/remanufacturing system using one shared resource  

E-Print Network [OSTI]

Optimal control of a hybrid production/remanufacturing system using one shared resource Lâm Laurent. Such systems are called hybrid production/remanufacturing systems and have received a growing attention. Sharing resources increases the flexibility of the system but complicates the production

Paris-Sud XI, Université de

186

Coil system for a mirror-based hybrid reactor  

SciTech Connect (OSTI)

Two different superconducting coil systems for the SFLM Hybrid study - a quadrupolar mirror based fusion-fission reactor study - are presented. One coil system is for a magnetic field with 2 T at the midplane and a mirror ratio of four. This coil set consists of semiplanar coils in two layers. The alternative coil system is for a downscaled magnetic field of 1.25 T at the midplane and a mirror ratio of four, where a higher {beta} is required to achieve sufficient the neutron production. This coil set has one layer of twisted 3D coils. The 3D coils are expected to be considerably cheaper than the semiplanar, since NbTi superconductors can be used for most coils instead of Nb3Sn due to the lower magnetic field.

Hagnestal, A.; Agren, O.; Moiseenko, V. E. [Uppsala University, Angstroem laboratory, Division of Electricity, Box 534, SE-751 21 Uppsala (Sweden); Institute of Plasma Physics, National Science Center 'Kharkov Institute of Physics and Technology', Akademichna st. 1, 61108 Kharkiv (Ukraine)

2012-06-19T23:59:59.000Z

187

Simulation of a new grid-connected hybrid generation system with Stirling engine and wind turbine  

Science Journals Connector (OSTI)

A detail model including all mechanical and electrical aspects is necessary to fully study hybrid grid operation. In this paper a new grid-connected hybrid generation system with a Stirling engine and a wind turbine which are connected to a grid through a common dc bus is presented. The Stirling is more efficient than photo voltaic array and its combination with the wind turbine can create an efficient hybrid system. Fatigue Aerodynamics Structures and Turbulence and Simulink/MATLAB are used to model the mechanical parts of the wind turbine Stirling engine and electrical parts. Field oriented control method is developed on voltage source converter. Power signal feedback method is implemented to determine generators reference shaft speed in hybrid system. Permanent magnet synchronous generator is used in the wind turbine and Stirling engine. Simulation results show that a new hybrid generation system with Stirling and wind turbine can work like other hybrid system and has suitable performance.

H. Shariatpanah; M. Zareian Jahromi; R. Fadaeinedjad

2013-01-01T23:59:59.000Z

188

Advanced, Energy-Efficient Hybrid Membrane System for Industrial Water Reuse  

Broader source: Energy.gov [DOE]

Demonstrate an advanced water treatment and reuse process in a single hybrid system that combines forward osmosis with membrane distillation to achieve greater efficiency and increased water reuse.

189

Robust optimal sizing of an hybrid energy stand-alone system  

E-Print Network [OSTI]

Mar 25, 2014 ... Abstract: This paper deals with the optimal design of a stand-alone hybrid system composed of wind turbines, solar photovoltaic panels and...

Alain Billionnet

2014-03-25T23:59:59.000Z

190

Second law analysis of a liquid cooled battery thermal management system for hybrid and electric vehicles.  

E-Print Network [OSTI]

??As hybrid and electric vehicles continue to evolve there is a need for better battery thermal management systems (BTMS), which maintain uniformity of operating temperature (more)

Ramotar, Lokendra

2010-01-01T23:59:59.000Z

191

High Temperature InGaN Topping Cells for Hybrid Photovoltaic/Concentrating Solar Thermal Systems  

Science Journals Connector (OSTI)

Hybrid PV/CSP systems offer the potential of higher solar to grid efficiency, with the benefits of dispatchable electricity from thermal storage. Here we present an implementation...

Honsberg, Christiana; Gleckman, Philip; Doolittle, William A; Ponce, Fernando; Arena, Chantal; Vasileska, Dragica; Goodnick, Stephen M

192

Energy Management System for an Hybrid Electric Vehicle, Using Ultracapacitors and Neural Networks  

E-Print Network [OSTI]

Energy Management System for an Hybrid Electric Vehicle, Using Ultracapacitors and Neural Networks management system for hybrid electric vehicles (HEV), using neural networks (NN), was developed and tested. The system minimizes the energy requirement of the vehicle and can work with different primary power sources

Catholic University of Chile (Universidad Católica de Chile)

193

Stability of Hybrid System Limit Cycles: Application to the Compass Gait Biped Robot  

E-Print Network [OSTI]

Stability of Hybrid System Limit Cycles: Application to the Compass Gait Biped Robot Ian A. Hiskens are illustrated using a com- pass gait biped robot example. 1 Introduction Hybrid systems are characterized a diverse range of application areas. Examples include power systems [1], robotics [2, 3], manufacturing [4

Hiskens, Ian A.

194

Laboratory-scale study of hydraulic fracturing in heterogeneous media for enhanced geothermal systems and general well stimulation.  

E-Print Network [OSTI]

??The primary objectives of this research were to experiment with hydraulic fracturing in the laboratory to gain additional understanding of the fracturing process in unconventional (more)

Frash, Luke P.

2014-01-01T23:59:59.000Z

195

Control system and method for a hybrid electric vehicle  

DOE Patents [OSTI]

A vehicle system controller (20) is presented for a LSR parallel hybrid electric vehicle having an engine (10), a motor (12), wheels (14), a transmission (16) and a battery (18). The vehicle system controller (20) has a state machine having a plurality of predefined states (22-32) that represent operating modes for the vehicle. A set of rules is defined for controlling the transition between any two states in the state machine. The states (22-32) are prioritized according to driver demands, energy management concerns and system fault occurrences. The vehicle system controller (20) controls the transitions from a lower priority state to a higher priority state based on the set of rules. In addition, the vehicle system controller (20) will control a transition to a lower state from a higher state when the conditions no longer warrant staying in the current state. A unique set of output commands is defined for each state for the purpose of controlling lower level subsystem controllers. These commands serve to achieve the desire vehicle functionality within each state and insure smooth transitions between states.

Phillips, Anthony Mark (Northville, MI); Blankenship, John Richard (Dearborn, MI); Bailey, Kathleen Ellen (Dearborn, MI); Jankovic, Miroslava (Birmingham, MI)

2001-01-01T23:59:59.000Z

196

A new hybrid algorithm for analysis of HVdc and FACTs systems  

SciTech Connect (OSTI)

Hybrid stability programs use a transient stability analysis for ac systems, in conjunction with detailed state variable or EMTP type modelling for fast dynamic devices. This paper presents a new hybrid algorithm that uses optimized techniques based on previously proposed methods. The hybrid provides a useful analysis tool to examine systems incorporating fast dynamic non-linear components such as HVdc links and FACTs devices.

Anderson, G.W.J. [New Zealand Aluminium Smelters Ltd., Invercargill (New Zealand); Watson, N.R.; Arnold, C.P.; Arrillaga, J. [Univ. of Canterbury, Christchurch (New Zealand)

1995-12-31T23:59:59.000Z

197

Summary and evaluation of hydraulic property data available for the Hanford Site upper basalt confined aquifer system  

SciTech Connect (OSTI)

Pacific Northwest Laboratory, as part of the Hanford Site Ground-Water Surveillance Project, examines the potential for offsite migration of contamination within the upper basalt confined aquifer system. For the past 40 years, hydrologic testing of the upper basalt confined aquifer has been conducted by a number of Hanford Site programs. Hydraulic property estimates are important for evaluating aquifer flow characteristics (i.e., ground-water flow patterns, flow velocity, transport travel time). Presented are the first comprehensive Hanford Site-wide summary of hydraulic properties for the upper basalt confined aquifer system (i.e., the upper Saddle Mountains Basalt). Available hydrologic test data were reevaluated using recently developed diagnostic test analysis methods. A comparison of calculated transmissivity estimates indicates that, for most test results, a general correspondence within a factor of two between reanalysis and previously reported test values was obtained. For a majority of the tests, previously reported values are greater than reanalysis estimates. This overestimation is attributed to a number of factors, including, in many cases, a misapplication of nonleaky confined aquifer analysis methods in previous analysis reports to tests that exhibit leaky confined aquifer response behavior. Results of the test analyses indicate a similar range for transmissivity values for the various hydro-geologic units making up the upper basalt confined aquifer. Approximately 90% of the calculated transmissivity values for upper basalt confined aquifer hydrogeologic units occur within the range of 10{sup 0} to 10{sup 2} m{sup 2}/d, with 65% of the calculated estimate values occurring between 10{sup 1} to 10{sup 2} m{sup 2}d. These summary findings are consistent with the general range of values previously reported for basalt interflow contact zones and sedimentary interbeds within the Saddle Mountains Basalt.

Spane, F.A. Jr.; Vermeul, V.R.

1994-09-01T23:59:59.000Z

198

Investigation into economical desalination using optimized hybrid renewable energy system  

Science Journals Connector (OSTI)

This paper investigates the use of hybrid renewable energy systems (HRESs) in Reverse Osmosis (RO) desalination. Mathematical model aided with a newly developed computer program for sizing (HRES) components. The study evaluates the individual and total expenses needed as well as the amount of excess renewable energy production. An optimization program was developed to select the best (HRES) combination that can produce desalinated water in a relatively economic cost. It demonstrates an investigated optimization approach based on minimization of the excess energy. It presents the impact of the considered optimization technique on the unit cost of energy and consequently unit cost of desalinated water. Unit production costs of both energy and desalinated water for two existing small and medium (RO) plants powered with conventional electricity grid are compared with the generated electricity from optimized (HRES). Cost sensitivity evaluation for (HRES) components to estimate the most economical price of (HRES) for desalination is presented.

A. Hossam-Eldin; A.M. El-Nashar; A. Ismaiel

2012-01-01T23:59:59.000Z

199

Information thermodynamics in a hybrid opto-mechanical system  

E-Print Network [OSTI]

Information thermodynamics is a recent field that investigates the links between information and energy. Its most famous "Gedankenexperiments" are Landauer erasure and Szilard engine, that describe the reversible conversion of a single bit of information into an elementary amount of work between a system and a battery. So far, direct evidences of such reversible work exchanges by measuring the battery's energy has remained elusive. In this article, we show that a hybrid optomechanical transducer is a proper platform to monitor these conversions. Such devices consist in an optically active quantum emitter, playing the role of the bit, coupled to a mechanical resonator, playing the role of the battery. Heat is exchanged with the electromagnetic reservoir. Within a mechanical oscillation, we connect the entropy variations of the quantum emitter with the mechanical energy variations, that are identi?ed with work exchanges. These results pave the road towards experimental investigation of quantum information thermodynamics.

Cyril Elouard; Maxime Richard; Alexia Auffves

2014-09-23T23:59:59.000Z

200

Hydraulic fracturing-1  

SciTech Connect (OSTI)

This book contains papers on hydraulic fracturing. Topics covered include: An overview of recent advances in hydraulic fracturing technology; Containment of massive hydraulic fracture; and Fracturing with a high-strength proppant.

Not Available

1990-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Hybrid reliability model for nuclear reactor safety system  

Science Journals Connector (OSTI)

The dependability of critical safety systems needs to be quantitatively determined in order to verify their effectiveness, e.g. with regard to regulatory requirements. Since modular redundant safety systems are not required for normal operation, their reliability is strongly dependent on periodic inspection. Several modeling methods for the quantitative assessment of dependability are described in the literature, with a broad variation in complexity and modeling power. Static modeling techniques such as fault tree analysis (FTA) or reliability block diagrams (RBD) are not capable of capturing redundancy and repair or test activities. Dynamic state space based models such as continuous time Markov chains (CTMC) are more powerful but often result in very large, intractable models. Moreover, exponentially distributed state residence times are not a correct representation of actual residence times associated with repair activities or periodic inspection. In this study, a hybrid model combines a system level RBD with a CTMC to describe the dynamics. The effects of periodic testing are modeled by redistributing state probabilities at deterministic test times. Applying the method to the primary safety shutdown system of the BR2(Belgian Reactor 2)nuclear research reactor, resulted in a quantitative as well as a qualitative assessment of its reliability.

Steven Verlinden; Geert Deconinck; Bernard Coup

2012-01-01T23:59:59.000Z

202

Hybrid-drive implosion system for ICF targets  

DOE Patents [OSTI]

Hybrid-drive implosion systems for ICF targets are described which permit a significant increase in target gain at fixed total driver energy. The ICF target is compressed in two phases, an initial compression phase and a final peak power phase, with each phase driven by a separate, optimized driver. The targets comprise a hollow spherical ablator surroundingly disposed around fusion fuel. The ablator is first compressed to higher density by a laser system, or by an ion beam system, that in each case is optimized for this initial phase of compression of the target. Then, following compression of the ablator, energy is directly delivered into the compressed ablator by an ion beam driver system that is optimized for this second phase of operation of the target. The fusion fuel is driven, at high gain, to conditions wherein fusion reactions occur. This phase separation allows hydrodynamic efficiency and energy deposition uniformity to be individually optimized, thereby securing significant advantages in energy gain. In additional embodiments, the same or separate drivers supply energy for ICF target implosion. 3 figs.

Mark, J.W.K.

1987-10-14T23:59:59.000Z

203

A novel optimization sizing model for hybrid solar-wind power generation system  

Science Journals Connector (OSTI)

This paper develops the Hybrid Solar-Wind System Optimization Sizing (HSWSO) model, to optimize the capacity sizes of different components of hybrid solar-wind power generation systems employing a battery bank. The HSWSO model consists of three parts: the model of the hybrid system, the model of Loss of Power Supply Probability (LPSP) and the model of the Levelised Cost of Energy (LCE). The flow chart of the HSWSO model is also illustrated. With the incorporated HSWSO model, the sizing optimization of hybrid solar-wind power generation systems can be achieved technically and economically according to the system reliability requirements. A case study is reported to show the importance of the HSWSO model for sizing the capacities of wind turbines, PV panel and battery banks of a hybrid solar-wind renewable energy system.

Hongxing Yang; Lin Lu; Wei Zhou

2007-01-01T23:59:59.000Z

204

Experimental Study of the Thermal-Hydraulic Phenomena in the Reactor Cavity Cooling System and Analysis of the Effects of Graphite Dispersion  

E-Print Network [OSTI]

An experimental activity was performed to observe and study the effects of graphite dispersion and deposition on thermal hydraulic phenomena in a Reactor Cavity Cooling System (RCCS). The small scale RCCS experimental facility (16.5cm x 16.5cm x 30...

Vaghetto, Rodolfo

2012-07-16T23:59:59.000Z

205

Special Session on Switched and Hybrid Systems Thursday, November 18, 2010  

E-Print Network [OSTI]

) The set-valued bouncing ball and its application to Lagrangian hybrid systems 11:30-11:45 Josef ShinarIEEEI2010 Special Session on Switched and Hybrid Systems Thursday, November 18, 2010 Topaz Hall in the wheeled robot problem 08:42-08:54 Ron Teichner and Michael Margaliot (Tel Aviv University, Israel

Margaliot, Michael

206

Designing a residential hybrid electrical energy storage system based on the energy buffering strategy  

Science Journals Connector (OSTI)

Due to severe variation in load demand over time, utility companies generally raise electrical energy price during periods of high load demand. A grid-connected hybrid electrical energy storage (HEES) system can help residential users lower their electric ... Keywords: electric bill savings, energy management, hybrid electrical energy storage system

Di Zhu; Siyu Yue; Yanzhi Wang; Younghyun Kim; Naehyuck Chang; Massoud Pedram

2013-09-01T23:59:59.000Z

207

Short communication Optimization of hybrid ground coupled and air source heat pump systems  

E-Print Network [OSTI]

Short communication Optimization of hybrid ­ ground coupled and air source ­ heat pump systems 2008 Accepted 14 January 2010 Available online 28 January 2010 Keywords: Ground coupled heat pump Air to water heat pump Thermal storage device Hybrid HVAC system Energy efficiency Numerical simulation a b

Fernández de Córdoba, Pedro

208

Stresa, Italy, 26-28 April 2006 THERMOELECTRIC AND MICROBATTERY HYBRID SYSTEM WITH ITS POWER  

E-Print Network [OSTI]

developed. It consists in hybriding an energy storage system (thin film solid state battery change depending on the outside conditions) and required by the thin film solid state battery conversion and energy storage. A hybrid system comprising a thermoelectric generator, a thin film solid state

Paris-Sud XI, Université de

209

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

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

with Focus on Emissions Comparative simulations of hybrid electric vehicles with gasoline and diesel engines will be conducted with focus on emissions control. deer10gao.pdf...

210

Facilitated transport membrane hybrid systems for olefin purification  

SciTech Connect (OSTI)

A new membrane system has been developed by BP for refinery and chemical plant olefin purification and recovery. This facilitated transport system, coupled with distillation, offers lower capital and operating costs than conventional distillation alone. Initial results on lab scale hollow fiber devices indicate membrane flux ranging from 8.75 {times} 10{sup {minus}6} to 8 {times} 10{sup {minus}5} m{sup 3}/m{sup 2}/sec (2.5 to 23 scfd/ft{sub 2}) and selectivities from 150 to 300. Pilot plant experiments on propylene/propane and ethylene purge gas recovery over three to six months duration show membrane stability and product purity of 98.5% or greater using refinery grade propylene feed. Hybrid system optimization data for membranes and distillation indicate that using a side draw from the distillation tower provides advantages in terms of membrane area, purity of feed to the membrane, and low per-pass recovery coupled with high overall propylene recovery. Membrane performance data under various conditions are also presented. In addition to performance data, economic evaluation and energy savings are discussed.

Davis, J.C.; Valus, R.J.; Eshraghi, R.; Velikoff, A.E. [BP Research, Cleveland, OH (United States)

1993-01-01T23:59:59.000Z

211

Hybrid Models  

Science Journals Connector (OSTI)

Up to this point, we have been discussing systems of equations involving continuous variables. In this chapter, we will discuss hybrid system behavior. Hybrid behavior involves not just continuous variables and e...

Michael Tiller Ph.D.

2001-01-01T23:59:59.000Z

212

Hybrid Ground Source System Analysis and Tool Development  

Broader source: Energy.gov [DOE]

Project objectives: 1. Compile filtered hourly data for three monitored hybrid installations. 2.Validate existing HyGCHP model. 3.Refine and enhance the HyGCHP model (usability / capability). 4. Demonstrate impact of actual hybrid installations. 5. Report lessons learned and impacts of HyGSHPs to design/engineering community.

213

One Optimal Sizing Method for Designing Hybrid Solar-Wind-Diesel Power Generation Systems  

Science Journals Connector (OSTI)

This paper recommended an optimal design model for designing stand-alone hybrid solar-wind-diesel systems. The optimum configuration ensures that the annualized cost of the systems is minimized while satisfying t...

Zhou Wei; Yang Hongxing

2009-01-01T23:59:59.000Z

214

Two-Dimensional Hybrid Spatial Audio Systems with User Variable Controls of Sound Source Attributes  

Science Journals Connector (OSTI)

This paper presents two novel hybrid spatial audio systems demonstrated for use in two-dimensional ... further creative freedom to a composer, sound engineer or sound designer. The systems are principally ... bas...

Martin J. Morrell; Joshua D. Reiss

2013-01-01T23:59:59.000Z

215

DC Connected Hybrid Offshore-Wind and Tidal Turbine Generation System  

Science Journals Connector (OSTI)

Hybrid Offshore-wind and Tidal Turbine (HOTT) generation system (Rahman and ... interconnecting method for a DC side cluster of wind and tidal turbine generators system are proposed. This method can be achieved...

Mohammad Lutfur Rahman; Yasuyuki Shirai

2010-01-01T23:59:59.000Z

216

STATEMENT OF CONSIDERATIONS REQUEST BY HYBRID POWER GENERATION SYSTEMS, LLC, FOR AN ADVANCE  

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

AN ADVANCE AN ADVANCE WAIVER OF DOMESTIC AND FOREIGN INVENTION RIGHTS UNDER DOE COOPERATIVE AGREEMENT NO. DE-FC26-01NT40779; W(A)-03-015, CH-1142 The Petitioner, Hybrid Power Generation Systems, LLC, a wholly owned subsidiary of General Electric Company (GE HPGS), was awarded this cooperative agreement for the performance of work entitled, "Solid Oxide Fuel Cell Hybrid System for Distributed Power Generation". The purpose of the cooperative agreement is to develop and demonstrate the feasibility of a highly efficient hybrid system integrating a planar Solid Oxide Fuel Cell (SOFC) and a turbogenerator. The proposed hybrid system is based on planar SOFC and turbogenerator power technologies. The focus of this work is to test a sub-scale SOFC and turbocharger hybrid

217

Fluorescence from a quantum dot and metallic nanosphere hybrid system  

SciTech Connect (OSTI)

We present energy absorption and interference in a quantum dot-metallic nanosphere system embedded on a dielectric substrate. A control field is applied to induce dipole moments in the nanosphere and the quantum dot, and a probe field is applied to monitor absorption. Dipole moments in the quantum dot or the metal nanosphere are induced, both by the external fields and by each other's dipole fields. Thus, in addition to direct polarization, the metal nanosphere and the quantum dot will sense one another via the dipole-dipole interaction. The density matrix method was used to show that the absorption spectrum can be split from one peak to two peaks by the control field, and this can also be done by placing the metal sphere close to the quantum dot. When the two are extremely close together, a self-interaction in the quantum dot produces an asymmetry in the absorption peaks. In addition, the fluorescence efficiency can be quenched by the addition of a metal nanosphere. This hybrid system could be used to create ultra-fast switching and sensing nanodevices.

Schindel, Daniel G. [Department of Mathematics and Statistics, University of Winnipeg, 515 Portage Avenue, Winnipeg, MB, R3B 2E9 (Canada); Singh, Mahi R. [Department of Physics and Astronomy, University of Western Ontario, 1151 Richmond Street, London, ON, N6A 3K7 (Canada)

2014-03-31T23:59:59.000Z

218

School of Mechanical Engineering, Purdue UniversitySchool of Mechanical Engineering, Purdue UniversitySchool of Mechanical Engineering, Purdue University EnergyEnergy--Saving Control of Hydraulic SystemsSaving Control of Hydraulic Systems  

E-Print Network [OSTI]

School of Mechanical Engineering, Purdue UniversitySchool of Mechanical Engineering, Purdue UniversitySchool of Mechanical Engineering, Purdue University EnergyEnergy--Saving Control of Hydraulic Principle Investigator: Bin Yao Research Assistant: Song Liu School of Mechanical Engineering Purdue

Yao, Bin

219

Discussion on the Energy-Saving Potential of a Hybrid System in a Large Space Building in Different Areas  

E-Print Network [OSTI]

The use of a hybrid ventilation system is promoted to decrease the annual energy consumption of air conditioning. The switch-point of temperature, which is related with weather conditions, is presented to control the hybrid system properly...

Liu, S.; Huang, C.

2006-01-01T23:59:59.000Z

220

Optimal management of hybrid PV/fuel cell/battery power system: A comparison of optimal hybrid approaches  

Science Journals Connector (OSTI)

Abstract In this paper, different optimal hybrid techniques have been proposed for management of a hybrid power generation system including photovoltaic (PV), fuel cell and battery. The main power of the hybrid system comes from the photovoltaic panels, while the fuel cell and batteries are used as back up units. In order to achieve maximum power point tracking for the photovoltaic system, both fuzzy logic controller and perturb and observation methods are examined and their performances have been investigated via simulations. Next, the performance of the hybrid system has been improved via employing a family of well-known optimization approaches for load sharing among the available resources. Imperialist Competitive Algorithm (ICA), Particle Swarm Optimization (PSO), Quantum behaved Particle Swarm Optimization (QPSO), Ant Colony Optimization (ACO), and Cuckoo Optimization Algorithm (COA) are used to manage the load sharing to achieve optimal performance while the system constraints are met. The optimal performance has been characterized via the control strategy performance measure being the ratio of the amount of hydrogen production with respect to the hydrogen consumption. In order to verify the system performance, simulation studies have been carried out using practical load demand data and real weather data (solar irradiance and air temperature). Different combination of maximum power point tracking methods with various optimization algorithms have been compared with each other. The results show that the combination of fuzzy logic controller with QPSO has the best performance among the considered combinations. In this situation, when the solar irradiation is noticeably high, the required load is supplied mainly by PV array, while the battery is charged, simultaneously. In the other times, the load is mainly fed by the battery and fuel cell while the performance constraints of battery is met and the daily performance measure is optimized.

Nooshin Bigdeli

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Technical and Economic Analysis of Thermal Solar Energy and Rainwater Use in a School Building Hydraulic System: A Case Study in a Brazilian City  

E-Print Network [OSTI]

TECHNICAL AND ECONOMICAL ANALYSIS OF THERMAL SOLAR ENERGY AND RAINWATER USE IN A SCHOOL BUILDING HYDRAULIC SYSTEM: A CASE STUDY IN A BRAZILIAN CITY Leila Maria Beloni C. Proti 1 , Ederaldo Godoy Jnior 2 , Jos Rui Camargo 3 1 Belo Horizonte... Leilabeloni@ig.com.br; rui@mec.unitau.br Abstract Thermal solar energy and rainwater utilization systems are presented as effective alternatives to the sole use of potable water and electricity in a Brazilian school building in Belo Horizonte...

Beloni, L. M.; Proti, C.; Godoy, E.; Camargo, J.

2005-01-01T23:59:59.000Z

222

Molten carbonate fuel cell and gas turbine hybrid systems as distributed energy resources  

Science Journals Connector (OSTI)

Molten carbonate fuel cell (MCFC)/gas turbine (GT) hybrid system has attracted a great deal of research effort due to its higher electricity efficiency. However, its technology has remained at the conceptual level due to incomplete examination of the related issues, challenges and variables. To contribute to the development of system technology, the MCFC/GT hybrid system is analyzed and discussed herein. A qualitative comparison of the two kinds of MCFC/GT hybrid system, indirect and direct, is hindered by the many variables involved. However, the indirect system may be preferred for relatively small-scale systems with the micro-GT. The direct system can be more competitive in terms of system efficiency and GT selection due to the optionality of system layouts as well as even higher GT inlet temperature. System layout is an important factor influencing the system efficiency. The other issues such as GT selection, system pressurization and part-load operation are also significant.

Jung-Ho Wee

2011-01-01T23:59:59.000Z

223

Control System Development for an Advanced-Technology Medium-Duty Hybrid Electric Truck  

E-Print Network [OSTI]

diesel engine, an electric motor, a Lithium-Ion battery, and an Eaton automated manual transmission03TB-45 Control System Development for an Advanced-Technology Medium-Duty Hybrid Electric Truck and vehicle test results for a medium-duty hybrid electric truck are reported in this paper. The design

Grizzle, Jessy W.

224

CONTROL ELECTRONICS AND HYBRID DYNAMIC SYSTEM-BASED API FOR A 6-DOF DESKTOP HAPTIC INTERFACE  

E-Print Network [OSTI]

, , , , DSC7C-5 CONTROL ELECTRONICS AND HYBRID DYNAMIC SYSTEM-BASED API FOR A 6-DOF DESKTOP HAPTIC, a new low level applications pro- gramming interface API that models the haptic interface as a hybrid in this paper. A new approach to the design of haptic APIs is also presented. In this approach, the haptic

Salcudean, Tim

225

Optimal Green Energy Utilization in MIMO Systems with Hybrid Energy Supplies  

E-Print Network [OSTI]

1 Optimal Green Energy Utilization in MIMO Systems with Hybrid Energy Supplies Congshi Hu, Jie Gong, it is feasible for BSs to be powered by green energy, such as solar energy and wind energy. For instance link with hybrid energy harvesting and grid power supply. We optimize the power allocation to minimize

226

Vehicle Technologies Office: Materials for Hybrid and Electric Drive Systems  

Broader source: Energy.gov [DOE]

The Vehicle Technologies Office (VTO) is working to lower the cost and increase the convenience of electric drive vehicles, which include hybrid and plug-in electric vehicles. These vehicles use...

227

Wind Solar Hybrid Systems in Tunisia: An Optimization Protocol  

Science Journals Connector (OSTI)

In this work, potentials, state-of-the-art and development of hybrid wind-solar plants in the eastern-North Africa zone ... adopted: the protocol exploits data -such as solar radiation and cumulative mean wind sp...

Karemt Boubaker; Andrea Colantoni

2013-01-01T23:59:59.000Z

228

A hyperdense semantic domain for hybrid dynamic systems to model different classes of discontinuities  

Science Journals Connector (OSTI)

The physics of technical systems, such as embedded and cyber-physical systems, is frequently modeled using the notion of continuous time. The underlying continuous phenomena may, however, occur at a time scale much faster than the system behavior of ... Keywords: hybrid systems, modeling, physical systems, physics, semantics, simulation

Pieter J. Mosterman, Gabor Simko, Justyna Zander, Zhi Han

2014-04-01T23:59:59.000Z

229

Hydraulic model analysis of water distribution system, Rockwell International, Rocky Flats, Colorado  

SciTech Connect (OSTI)

Rockwell International requested an analysis of the existing plant site water supply distribution system at Rocky Flats, Colorado, to determine its adequacy. On September 26--29, 1988, Hughes Associates, Inc., Fire Protection Engineers, accompanied by Rocky Flats Fire Department engineers and suppression personnel, conducted water flow tests at the Rocky Flats plant site. Thirty-seven flows from various points throughout the plant site were taken on the existing domestic supply/fire main installation to assure comprehensive and thorough representation of the Rocky Flats water distribution system capability. The analysis was completed in four phases which are described, together with a summary of general conclusions and recommendations.

Perstein, J.; Castellano, J.A. [Hughes Associates, Inc., Wheaton, MD (United States)

1989-01-20T23:59:59.000Z

230

The split system approach to managing time in simulations of hybrid systems having continuous and discrete event components  

SciTech Connect (OSTI)

The efficient and accurate management of time in simulations of hybrid models is an outstanding engineering problem. General a priori knowledge about the dynamic behavior of the hybrid system (i.e. essentially continuous, essentially discrete, or 'truly hybrid') facilitates this task. Indeed, for essentially discrete and essentially continuous systems, existing software packages can be conveniently used to perform quite sophisticated and satisfactory simulations. The situation is different for 'truly hybrid' systems, for which direct application of existing software packages results in a lengthy design process, cumbersome software assemblies, inaccurate results, or some combination of these independent of the designer's a priori knowledge about the system's structure and behavior. The main goal of this paper is to provide a methodology whereby simulation designers can use a priori knowledge about the hybrid model's structure to build a straightforward, efficient, and accurate simulator with existing software packages. The proposed methodology is based on a formal decomposition and re-articulation of the hybrid system; this is the main theoretical result of the paper. To set the result in the right perspective, we briefly review the essentially continuous and essentially discrete approaches, which are illustrated with typical examples. Then we present our new, split system approach, first in a general formal context, then in three more specific guises that reflect the viewpoints of three main communities of hybrid system researchers and practitioners. For each of these variants we indicate an implementation path. Our approach is illustrated with an archetypal problem of power grid control.

Nutaro, James J [ORNL; Kuruganti, Phani Teja [ORNL; Protopopescu, Vladimir A [ORNL; Shankar, Mallikarjun [ORNL

2012-01-01T23:59:59.000Z

231

Multi-Objective Capacity Planning of a Pv-Wind-Diesel-Battery Hybrid Power System  

E-Print Network [OSTI]

A new solution methodology of the capacity design problem of a PV-Wind-Diesel-Battery Hybrid Power System (HPS) is presented. The problem is formulated as a Linear Programming (LP) model with two objectives: minimizing ...

Saif, A.

232

Design of a hybrid energy-generation system for autonomous kayaks  

E-Print Network [OSTI]

The goal of this research is to design and analyze a series-hybrid energy-production system for an autonomous kayak. Currently these vehicles have limited range due to energy storage in lead acid batteries. Extending the ...

Plumer, Kevin E. (Kevin Edward)

2010-01-01T23:59:59.000Z

233

Analysis of a solar dishStirling system with hybridization and thermal storage  

Science Journals Connector (OSTI)

A high potential of thermosolar power generation systems is the use of thermal storage and/or hybridization to overcome dependability of solar resource availability. The incorporation of these technologies ... on...

Carlos Monn; Yolanda Bravo

2014-07-01T23:59:59.000Z

234

Simulation Study of Hybrid Ground Source Heat Pump System in the Hot-Humid Climate.  

E-Print Network [OSTI]

??The beachfront hotel with hybrid geothermal heat pump system (HyGSHP), located in the hot-humid climate, is simulated by TRNSYS in the thesis, and the simulation (more)

Zhu, Jiang

2011-01-01T23:59:59.000Z

235

A Functional Hybrid Memristor Crossbar-Array/CMOS System for Data Storage and Neuromorphic Applications  

Science Journals Connector (OSTI)

A Functional Hybrid Memristor Crossbar-Array/CMOS System for Data Storage and Neuromorphic Applications ... This work used the Lurie Nanofabrication Facility at the University of Michigan, a member of the National Nanotechnology Infrastructure Network (NNIN) funded by the NSF. ...

Kuk-Hwan Kim; Siddharth Gaba; Dana Wheeler; Jose M. Cruz-Albrecht; Tahir Hussain; Narayan Srinivasa; Wei Lu

2011-12-05T23:59:59.000Z

236

A New Hybrid Proton-Exchange-Membrane Fuel Cells-Battery Power System with Efficiencies Considered  

Science Journals Connector (OSTI)

Hybrid systems, based on lead-acid or lithium-ion batteries and proton-exchange-membrane fuel cells (PEMFCs), give the possibility of ... results show that the combination of lead-acid batteries or lithium-ion batteries

Chung-Hsing Chao; Jenn-Jong Shieh

2013-01-01T23:59:59.000Z

237

Hydraulic conductivity imaging from 3-D transient hydraulic tomography at several pumping/observation densities  

E-Print Network [OSTI]

of transport and design and operation of ground- water remediation systems, are crucially dependent transient hydraulic tomography at several pumping/observation densities, Water Resour. Res., 49, 7311

Barrash, Warren

238

On-Board Fuel Processing for a Fuel Cell?Heat Engine Hybrid System  

Science Journals Connector (OSTI)

(9) Because they have used the same fuel, gasoline having an established infrastructure, to constrain the same well to tank (WTT) efficiency for the compared systems, the TTW efficiency of the hybrid FCHEV is unexpectedly low, because the gasoline processing to hydrogen with subsequent use of the latter in the FC had an efficiency of only 35% in their calculation. ... to increase by up to 15% by hybridizing it with an energy storage system. ...

Osman Sinan Ssl; ?pek Becerik

2009-03-24T23:59:59.000Z

239

The Effect of Pressure Difference Control on Hydraulic Stability in a Variable Flow Air Conditioning System  

E-Print Network [OSTI]

analysis is shown in table 3. Tab.3 Calculation results of direct return system terminal control j i 1 2 3 4 5 Yi 1 0 1 1 1 1 0 2 0.965 0 1 1 1 0.009 3 0.841 0.863 0 1 1 0.074 4 0.873 0.900 0.955 0 1 0.068 5 0.797 0.821 0.872 0.913 0 0.149 j... analysis is shown in table 3. Tab.3 Calculation results of direct return system terminal control j i 1 2 3 4 5 Yi 1 0 1 1 1 1 0 2 0.965 0 1 1 1 0.009 3 0.841 0.863 0 1 1 0.074 4 0.873 0.900 0.955 0 1 0.068 5 0.797 0.821 0.872 0.913 0 0.149 j...

Zhang, Z.; Fu, Y.; Chen, Y.

2006-01-01T23:59:59.000Z

240

Probabilistic modelling of hybrid solar/wind power system with solar tracking system  

Science Journals Connector (OSTI)

This paper presents a probabilistic model applied to a hybrid solar-wind power system (HSWPS), which is equipped with either a one-axis or a two-axis solar tracking system. Within the framework of a case study, the potential of the developed probabilistic approach is presented, and the effect of the solar tracking systems on the annual energy gain is discussed. Specifically, the impact of a tracking system on the probability density function (PDF) of the power produced by a photovoltaic system (PVS) is evaluated through the first four moments (mean, variance, skewness and kurtosis) of a PDF. Finally, to estimate the impact of a tracking system on HSWPS energy performance, a reliability analysis is performed using the energy index of reliability (EIR), which is directly related to energy expected not supplied (EENS), given different annual load scenarios.

Giuseppe Marco Tina; Salvina Gagliano

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Numerical estimation model of energy conversion for small hybrid solarwind system  

Science Journals Connector (OSTI)

This article presents a numerical model which can estimate the energy conversions of separate and hybrid solarwind systems under variable weather. The model integrates the equations associated with the characteristics of photovoltaic generation, wind energy conversion, energy balance, and battery bank, and uses the local database for radiation, wind speed, and ambient temperature. Once the equation associated with the characteristics of load is given, the numerical model can estimate the monthly and yearly powers output of the separate and hybrid solarwind systems provided with different configurations. As a fundamental research, the presentations of daily profiles of solar radiation, wind energy, and ambient temperature are explained in detail, and the combination of the characteristics of wind energy conversion and battery bank is determined. The condition of hybrid action is shown, and the solutions are certain to be found. The operation strategies of separate and hybrid systems are also presented.

Shun Ching Lee

2012-01-01T23:59:59.000Z

242

Design of a Commercial Hybrid VTOL UAV System  

Science Journals Connector (OSTI)

For the last four decades Unmanned Air Vehicles (UAVs) have been extensively used for military operations that include tracking, surveillance, active engagement with weapons and airborne data acquisition. UAVs are also in demand commercially due to their ... Keywords: Hybrid UAV, Tilt Rotor, UAV Design, VTOL

Ugur Ozdemir, Yucel Orkut Aktas, Aslihan Vuruskan, Yasin Dereli, Ahmed Farabi Tarhan, Karaca Demirbag, Ahmet Erdem, Ganime Duygu Kalaycioglu, Ibrahim Ozkol, Gokhan Inalhan

2014-04-01T23:59:59.000Z

243

Grundfos HVAC OEM Efficient water hydraulics  

E-Print Network [OSTI]

Compact Hydro Block for Heat Pumps Hydraulic solution for small Heat Pump Systems p condensor Heating Future opportunities for heat pumps Grundfos Compact Hydro block Composite Design for Heat Pumps hydraulics Available today: Compact Hydro Block for integration High degree of pre-design Most important

Oak Ridge National Laboratory

244

A hybrid intelligent system for alarm processing in power distribution substations  

Science Journals Connector (OSTI)

This application paper presents an intelligent system for alarm processing and fault location in power substations. A hybrid model is constructed using rule-based systems and an artificial neural network. Incoming alarms are initially handled by an input ... Keywords: Expert systems, fault location, neural networks

J. C. Stacchini de Souza; M. B. Do Coutto Filho; R. S. Freund

2010-04-01T23:59:59.000Z

245

A Policy Management System for Hybrid Networks N Vardalachos, J Rubio, A Galis and J Serrat  

E-Print Network [OSTI]

A Policy Management System for Hybrid Networks N Vardalachos, J Rubio, A Galis and J Serrat management system for this type of networks. 1. Introduction In recent years it has become apparent management system has been designed by applying mainly Open Distributed Processing (ODP) principles taking

Haddadi, Hamed

246

Rural Electrification Through Solar and Wind Hybrid System: A Self Sustained Grid Free Electric Power Source  

Science Journals Connector (OSTI)

In India, more than 200 million people live in rural areas without access to grid-connected power. A convenient & cost-effective solution would be hybrid power systems which can reduce dependency on grid supply, improve reliability. For a typical domestic load a solar wind hybrid system is designed with charge controller to charge a conventional battery. To optimize system efficiency, a simple algorithm is developed for system sizing. Total cost of unit is calculated using life cycle cost analysis and payback peri

Vadirajacharya; P.K. Katti

2012-01-01T23:59:59.000Z

247

An OSSE-based Evaluation of Hybrid Variational-Ensemble Data Assimilation for the NCEP GFS, Part I: System Description and 3D-Hybrid Results  

Science Journals Connector (OSTI)

An observing system simulation experiment (OSSE) has been carried out to evaluate the impact of a hybrid ensemble-variational data assimilation algorithm for use with the National Centers for Environmental Prediction (NCEP) global data ...

Daryl T. Kleist; Kayo Ide

248

Fuel cellgas turbine hybrid system design part II: Dynamics and control  

Science Journals Connector (OSTI)

Abstract Fuel cell gas turbine hybrid systems have achieved ultra-high efficiency and ultra-low emissions at small scales, but have yet to demonstrate effective dynamic responsiveness or base-load cost savings. Fuel cell systems and hybrid prototypes have not utilized controls to address thermal cycling during load following operation, and have thus been relegated to the less valuable base-load and peak shaving power market. Additionally, pressurized hybrid topping cycles have exhibited increased stall/surge characteristics particularly during off-design operation. This paper evaluates additional control actuators with simple control methods capable of mitigating spatial temperature variation and stall/surge risk during load following operation of hybrid fuel cell systems. The novel use of detailed, spatially resolved, physical fuel cell and turbine models in an integrated system simulation enables the development and evaluation of these additional control methods. It is shown that the hybrid system can achieve greater dynamic response over a larger operating envelope than either individual sub-system; the fuel cell or gas turbine. Results indicate that a combined feed-forward, PI and cascade control strategy is capable of handling moderate perturbations and achieving a 2:1 (MCFC) or 4:1 (SOFC) turndown ratio while retaining >65% fuel-to-electricity efficiency, while maintaining an acceptable stack temperature profile and stall/surge margin.

Dustin McLarty; Jack Brouwer; Scott Samuelsen

2014-01-01T23:59:59.000Z

249

Status Report on Transfer of Physical and Hydraulic Properties Databases to the Hanford Environmental Information System - PNNL Remediation Decision Support Project, Task 1, Activity 6  

SciTech Connect (OSTI)

This document provides a status report on efforts to transfer physical and hydraulic property data from PNNL to CHPRC for incorporation into HEIS. The Remediation Decision Support (RDS) Project is managed by Pacific Northwest National Laboratory (PNNL) to support Hanford Site waste management and remedial action decisions by the U.S. Department of Energy and their contractors. The objective of Task 1, Activity 6 of the RDS project is to compile all available physical and hydraulic property data for sediments from the Hanford Site, to port these data into the Hanford Environmental Information System (HEIS), and to make the data web-accessible to anyone on the Hanford Local Area Network via the so-called Virtual Library. These physical and hydraulic property data are used to estimate parameters for analytical and numerical flow and transport models that are used for site risk assessments and evaluation of remedial action alternatives. In past years efforts were made by RDS project staff to compile all available physical and hydraulic property data for Hanford sediments and to transfer these data into SoilVision{reg_sign}, a commercial geotechnical software package designed for storing, analyzing, and manipulating soils data. Although SoilVision{reg_sign} has proven to be useful, its access and use restrictions have been recognized as a limitation to the effective use of the physical and hydraulic property databases by the broader group of potential users involved in Hanford waste site issues. In order to make these data more widely available and useable, a decision was made to port them to HEIS and to make them web-accessible via a Virtual Library module. In FY08 the original objectives of this activity on the RDS project were to: (1) ensure traceability and defensibility of all physical and hydraulic property data currently residing in the SoilVision{reg_sign} database maintained by PNNL, (2) transfer the physical and hydraulic property data from the Microsoft Access database files used by SoilVision{reg_sign} into HEIS, which is currently being maintained by CH2M-Hill Plateau Remediation Company (CHRPC), (3) develop a Virtual Library module for accessing these data from HEIS, and (4) write a User's Manual for the Virtual Library module. The intent of these activities is to make the available physical and hydraulic property data more readily accessible and useable by technical staff and operable unit managers involved in waste site assessments and remedial action decisions for Hanford. In FY08 communications were established between PNNL and staff from Fluor-Hanford Co. (who formerly managed HEIS) to outline the design of a Virtual Library module that could be used to access the physical and hydraulic property data that are to be transferred into HEIS. Data dictionaries used by SoilVision{reg_sign} were also provided to Fluor-Hanford personnel who are now with CHPRC. During ongoing work to ensure traceability and defensibility of all physical and hydraulic property data that currently reside in the SoilVision{reg_sign} database, it was recognized that further work would be required in this effort before the data were actually ported into HEIS. Therefore work on the Virtual Library module development and an accompanying User's Guide was deferred until an unspecified later date. In FY09 efforts have continued to verify the traceability and defensibility of the physical and hydraulic property datasets that are currently being maintained by PNNL. Although this is a work in progress, several of these datasets are now ready for transfer to CHRPC for inclusion in HEIS. The actual loading of data into HEIS is performed by CHPRC staff, so after the data are transferred from PNNL to CHPRC, it will be the responsibility of CHPRC to ensure that these data are loaded and made accessible. This document provides a status report on efforts to transfer physical and hydraulic property data from PNNL to CHPRC for incorporation into HEIS.

Rockhold, Mark L.; Middleton, Lisa A.; Cantrell, Kirk J.

2009-06-30T23:59:59.000Z

250

Analysis of off-grid hybrid wind turbine/solar PV water pumping systems  

Science Journals Connector (OSTI)

While many remote water pumping systems exist (e.g. mechanical windmills, solar photovoltaic, wind-electric, diesel powered), few combine both the wind and solar energy resources to possibly improve the reliability and the performance of the system. In this paper, off-grid wind turbine (WT) and solar photovoltaic (PV) array water pumping systems were analyzed individually and combined as a hybrid system. The objectives were to determine: (1) advantages or disadvantages of using a hybrid system over using a WT or a solar PV array alone; (2) if the WT or solar PV array interfered with the output of the other; and (3) which hybrid system was the most efficient for the location. The WT used in the analysis was rated at 900W alternating current (AC). There were three different solar PV arrays analyzed, and they were rated at 320, 480, and 640W direct current (DC). A rectifier converted the 3-phase variable voltage AC output from the WT to DC before combining it with the solar PV array DC output. The combined renewable energies powered a single helical pump. The independent variable used in the hybrid WT/PV array analysis was in units of W/m2. The peak pump efficiency of the hybrid systems at Bushland, TX occurred for the 900W WT combined with the 640W PV array. The peak pump efficiencies at a 75m pumping depth of the hybrid systems were: 47% (WT/320W PV array), 51% (WT/480W PV array), and 55% (WT/640W PV array). Interference occurred between the WT and the different PV arrays (likely due to voltage mismatch between WT and PV array), but the least interference occurred for the WT/320W PV array. This hybrid system pumped 28% more water during the greatest water demand month than the WT and PV systems would have pumped individually. An additional controller with a buck/boost converter is discussed at end of paper for improvement of the hybrid WT/PV array water pumping system.

Brian D. Vick; Byron A. Neal

2012-01-01T23:59:59.000Z

251

Hybrid Generation Systems Planning Expansion Forecast: A Critical State of the Art Review  

E-Print Network [OSTI]

resources. In order to power system enhance reliability, efficiency and safety, renewable and nonrenewable, hydropower, geothermal, and biomass constitute a type of distributed electricity resources and have recently, these generation unit should be working together in two or more sources in the so-called hybrid system concept

Brest, Université de

252

A 20-SUN HYBRID PV-THERMAL LINEAR MICRO-CONCENTRATOR SYSTEM FOR URBAN ROOFTOP APPLICATIONS  

E-Print Network [OSTI]

A 20-SUN HYBRID PV-THERMAL LINEAR MICRO-CONCENTRATOR SYSTEM FOR URBAN ROOFTOP APPLICATIONS D Walter-mounted system couples the benefits of distributed PV electricity generation with the on-site generation of thermal energy in a temperature range of 60 to 220 ºC. This is ideal for applications ranging from

253

Commissioning of the Lower Hybrid Current Drive System on Alcator C-Mod  

E-Print Network [OSTI]

cooled magnets which allow sustained 5 T pulse durations at up to 5 s (several resistive diffusion times System (TPS) and programmable logic controller. Critical protection, control and status information- A Lower Hybrid Current Drive (LHCD) system has been developed for current profile control of advanced

Basse, Nils Plesner

254

Torque-Power-Speed Hybrid Control of Marine Electric Propulsion System  

Science Journals Connector (OSTI)

The conventional electric propulsion system is usually aimed at controlling the shaft speed only, without taking advantages of the electric propulsion motor into control strategies. This paper designs a SSP for marine electric propulsion system with ... Keywords: control, ship, marine electric propulsion, hybrid control

Guichen Zhang; Jie Ma

2010-05-01T23:59:59.000Z

255

Renewable Energy Powered Membrane Technology. 1. Development and Characterization of a Photovoltaic Hybrid Membrane System  

Science Journals Connector (OSTI)

Renewable Energy Powered Membrane Technology. 1. Development and Characterization of a Photovoltaic Hybrid Membrane System ... In isolated communities where potable water sources as well as energy grids are limited or nonexistent, treating brackish groundwater aquifers with small-scale desalination systems can be a viable alternative to existing water infrastructures. ...

A.I. Schfer; A. Broeckmann; B.S. Richards

2006-12-29T23:59:59.000Z

256

A HYBRID ADSORBENT-MEMBRANE REACTOR (HAMR) SYSTEM FOR HYDROGEN PRODUCTION  

E-Print Network [OSTI]

hydrogen production for proton exchange membrane (PEM) fuel cells for various mobile and stationaryA HYBRID ADSORBENT-MEMBRANE REACTOR (HAMR) SYSTEM FOR HYDROGEN PRODUCTION A. Harale, H. Hwang, P recently our focus has been on new HAMR systems for hydrogen production, of potential interest to pure

Southern California, University of

257

Model Predictive Control for Starvation Prevention in a Hybrid Fuel Cell System1  

E-Print Network [OSTI]

voltage, a control system is necessary for maintaining optimal temperature, membrane humidity and pressure: Schematic of the fuel cell stack and air supply control sys- tem. The fuel cell stack consists of 350 cellsModel Predictive Control for Starvation Prevention in a Hybrid Fuel Cell System1 Ardalan Vahidi 2

Stefanopoulou, Anna

258

Multidisciplinary Modeling, Control, and Optimization of a Solid Oxide Fuel Cell/Gas Turbine Hybrid Power System.  

E-Print Network [OSTI]

??This thesis describes a systematical study, including multidisciplinary modeling, simulation, control, and optimization, of a fuel cell - gas turbine hybrid power system that aims (more)

Abbassi Baharanchi, Atid

2009-01-01T23:59:59.000Z

259

DOE/NREL Inner Mongolia PV/Wind Hybrid Systems Pilot Project: A Post-Installation Assessment  

SciTech Connect (OSTI)

This report assesses the Inner Mongolia Pilot Project, which disseminates wind-solar hybrid systems to a rural and remote population.

Stroup, K. K.

2005-02-01T23:59:59.000Z

260

9 - Hybrid fuel cell gas turbine (FC/GT) combined cycle systems  

Science Journals Connector (OSTI)

Abstract: Hybrid fuel cell gas turbine systems consisting of high-temperature fuel cells (HTFCs) integrated into cycles with gas turbines can significantly increase fuel-to-electricity conversion efficiency and lower emissions of greenhouse gases and criteria pollutants from the electric power sector. In addition, the separated anode and cathode compartments of the fuel cell can enable CO2 separation and sequestration for some cycle configurations. Hybrid fuel cell gas turbine technology has the potential to operate on natural gas, digester gas, landfill gas, and coal and biomass syngas. HTFC technologies are emerging with high reliability and durability, which should enable them to be integrated with gas turbine technology to produce modern hybrid power systems. Advanced thermodynamic and dynamic simulation capabilities have been developed and demonstrated to enable future system integration and control.

J. Brouwer

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

OPTIMIZATION OF HYBRID GEOTHERMAL HEAT PUMP SYSTEMS Scott Hackel, Graduate Research Assistant; Gregory Nellis, Professor; Sanford Klein,  

E-Print Network [OSTI]

1 OPTIMIZATION OF HYBRID GEOTHERMAL HEAT PUMP SYSTEMS Scott Hackel, Graduate Research Assistant, Madison, WI, United States Abstract: Hybrid ground-coupled heat pump systems (HyGCHPs) couple conventional ground- coupled heat pump (GCHP) equipment with supplemental heat rejection or extraction systems

Wisconsin at Madison, University of

262

Optimal Design of a PV/Fuel Cell Hybrid Power System for the City of Brest in France  

E-Print Network [OSTI]

source. The produced hydrogen feeds then a fuel cell (FC) system, which will supply the city of BrestOptimal Design of a PV/Fuel Cell Hybrid Power System for the City of Brest in France Omar Hazem with the optimal design of a stand-alone hybrid photovoltaic and fuel cell power system without battery storage

Brest, Université de

263

Wind/hybrid power system test facilities in the United States and Canada  

SciTech Connect (OSTI)

By 1995, there will be four facilities available for testing of wind/hybrid power systems in the United States and Canada. This paper describes the mission, approach, capabilities, and status of activity at each of these facilities. These facilities have in common a focus on power systems for remote, off-grid locations that include wind energy. At the same time, these facilities have diverse, yet complimentary, missions that range from research to technology development to testing. The first facility is the test facility at the Institut de Recherche d`Hydro-Quebec (IREQ), Hydro-Quebec`s research institute near Montreal, Canada. This facility, not currently in operation, was used for initial experiments demonstrating the dynamic stability of a high penetration, no-storage wind/diesel (HPNSWD) concept. The second facility is located at the Atlantic Wind Test Site (AWTS) on Prince Edward Island, Canada, where testing of the HPNSWD concept developed by Hydro-Quebec is currently underway. The third is the Hybrid Power Test Facility planned for the National Wind Technology Center at the National Renewable Energy Laboratory (NREL) in Golden, Colorado, which will focus on testing commercially available hybrid power systems. The fourth is the US Department of Agriculture (USDA) Conservation and Production Research Laboratory in Bushland, Texas, where a test laboratory is being developed to study wind-energy penetration and control strategies for wind/hybrid systems. The authors recognize that this summary of test facilities is not all inclusive; for example, at least one US industrial facility is currently testing a hybrid power system. Our intent, though, is to describe four facilities owned by nonprofit or governmental institutions in North America that are or will be available for ongoing development of wind/hybrid power systems.

Green, H J [National Renewable Energy Lab., Golden, CO (United States); Clark, R N [USDA Conservation and Production Research Laboratory, Bushland, TX (United States); Brothers, C [Atlantic Wind Test Site, North Cape, PE (Canada); Saulnier, B [Institut de Recherche d`Hydro-Quebec, Varennes, PQ (Canada)

1994-05-01T23:59:59.000Z

264

Techno-economic evaluation of hybrid energy storage technologies for a solarwind generation system  

Science Journals Connector (OSTI)

Huazhong University of Science and Technology is planning to establish a hybrid solarwind generation dynamic simulation laboratory. Energy storage technologies will be vital to this system for load leveling, power quality control and stable output. In this paper, the technical feasibility of energy storage technologies for renewable intermittent sources like wind and solar generation is analyzed. Furthermore, the different combination modes of energy storage technologies are proposed. The involved energy storage technologies include superconducting magnetic energy storage systems (SMESs), flywheels (FWs), electrochemical super-capacitors (SCs) and redox flow batteries (RFBs). Based on that, the economic analysis of hybrid energy storage technologies is conducted.

L. Ren; Y. Tang; J. Shi; J. Dou; S. Zhou; T. Jin

2013-01-01T23:59:59.000Z

265

A "Hybrid" Approach for Synthesizing Optimal Controllers of Hybrid Systems: A Case Study of the Oil Pump Industrial Example  

E-Print Network [OSTI]

In this paper, we propose an approach to reduce the optimal controller synthesis problem of hybrid systems to quantifier elimination; furthermore, we also show how to combine quantifier elimination with numerical computation in order to make it more scalable but at the same time, keep arising errors due to discretization manageable and within bounds. A major advantage of our approach is not only that it avoids errors due to numerical computation, but it also gives a better optimal controller. In order to illustrate our approach, we use the real industrial example of an oil pump provided by the German company HYDAC within the European project Quasimodo as a case study throughout this paper, and show that our method improves (up to 7.5%) the results reported in [3] based on game theory and model checking.

Zhao, Hengjun; Kapur, Deepak; Larsen, Kim G

2012-01-01T23:59:59.000Z

266

Summary Report of the INL-JISEA Workshop on Nuclear Hybrid Energy Systems  

SciTech Connect (OSTI)

The Institute for Nuclear Energy Science and Technology (INEST) and the Joint Institute for Strategic Energy Analysis (JISEA) co-sponsored an international workshop to identify research topics important in advancing the potential use of hybrid systems with a specific focus on nuclear-renewable hybrid systems. The workshop included presentations ranging from energy challenges and research and development directions being pursued by nations to multiple options for hybrid systems. Those options include one that is being commercialized to other opportunities and analysis results quantifying them. The workshop also involved two breakout sessions--one focused on thermal energy management issues especially at unit-operation scale and the second focused on system operations issues including system controls, regulatory issues, technical and economic analysis, and market challenges. A discussion involving the full group focused on more general issues such as societal involvement and participation. Key criteria for selecting hybrid energy system projects and metrics for comparing them were also identified by the full group.

Antkowiak, M.; Ruth, M.; Boardman, R.; Bragg-Sitton, S.; Cherry, R.; Shunn, L.

2012-07-01T23:59:59.000Z

267

Acoustic Character Of Hydraulic Fractures In Granite  

E-Print Network [OSTI]

Hydraulic fractures in homogeneous granitic rocks were logged with conventional acoustic-transit-time, acoustic-waveform, and acoustic-televiewer logging systems. Fractured intervals ranged in depth from 45 to 570m. and ...

Paillet, Frederick I.

1983-01-01T23:59:59.000Z

268

STATEMENT OF CONSIDERATIONS REQUEST BY HYBRID POWER GENERATION SYSTEMS, LLC FOR AN ADVANCE  

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

JRN 19 2006 15:31 FR IPL DOE CH 630 252 2779 TO AGCP-HQ P.02/03 JRN 19 2006 15:31 FR IPL DOE CH 630 252 2779 TO AGCP-HQ P.02/03 * * STATEMENT OF CONSIDERATIONS REQUEST BY HYBRID POWER GENERATION SYSTEMS, LLC FOR AN ADVANCE WAIVER OF PATENT RIGHTS UNDER DOE COOPERATIVE AGREEMENT NO. DE-FC36-04G014351 ENTITLED "HIGH PERFORMANCE FLEXIBLE REVERSIBLE SOLID OXIDE FUEL CELL"; W(A)-04-080; CH-1259 As set out in the attached waiver petition and in subsequent discussions with DOE patent counsel, Hybrid Power Generation Systems, LLC (Hybrid Power), a wholly owned subsidiary of General Electric Company (GE), has requested an advance waiver of domestic and foreign patent rights for all subject inventions made under the above-identified cooperative agreement by its employees and its subcontractors' employees, regardless of tier, except

269

Optimal design and techno-economic analysis of a hybrid solarwind power generation system  

Science Journals Connector (OSTI)

Solar energy and wind energy are the two most viable renewable energy resources in the world. Good compensation characters are usually found between solar energy and wind energy. This paper recommend an optimal design model for designing hybrid solarwind systems employing battery banks for calculating the system optimum configurations and ensuring that the annualized cost of the systems is minimized while satisfying the custom required loss of power supply probability (LPSP). The five decision variables included in the optimization process are the PV module number, PV module slope angle, wind turbine number, wind turbine installation height and battery capacity. The proposed method has been applied to design a hybrid system to supply power for a telecommunication relay station along south-east coast of China. The research and project monitoring results of the hybrid project were reported, good complementary characteristics between the solar and wind energy were found, and the hybrid system turned out to be able to perform very well as expected throughout the year with the battery over-discharge situations seldom occurred.

Hongxing Yang; Zhou Wei; Lou Chengzhi

2009-01-01T23:59:59.000Z

270

Design and evaluation of a nuclear-electric hybrid power/propulsion system  

E-Print Network [OSTI]

INTRODUCTION Page Motivation Literature Search Contributions. . . . . . . Organization of the Thesis II SYSTEM DESCRIPTION AND MODELING Conventional Cycles Hybrid Cycle Cycle Components System Integration 6 10 10 29 III TRAJECTORY MODEL . 33 IV... investigating and comparing various closed and open cycles. El ? Genk et al. ' have investiga, ted three different cycles: A potassium Rankine cycle, a. closed and an open Brayton cycle. These systems v'ere optimized for a power level of 160 MWe and compared...

Keil, Ralph

2012-06-07T23:59:59.000Z

271

State estimation of probabilistic hybrid systems with particle filters  

E-Print Network [OSTI]

Robotic and embedded systems have become increasingly pervasive in every-day applications, ranging from space probes and life support systems to autonomous rovers. In order to act robustly in the physical world, robotic ...

Funiak, Stanislav, 1978-

2004-01-01T23:59:59.000Z

272

The Effect of PV Array Size and Battery Size on the Economics of PV/Diesel/Battery Hybrid RAPS Systems  

E-Print Network [OSTI]

Wh. INTRODUCTION A diesel hybrid system, incorporating a battery and inverter, can often provide power at a lower profile used for this study Fixed Power System Parameters The diesel and inverter were both sizedThe Effect of PV Array Size and Battery Size on the Economics of PV/Diesel/Battery Hybrid RAPS

273

Design of Hybrid Distillation-Vapor Membrane Separation Systems. Jose A. Caballero*; Ignacio E. Grossmann **; Majid Keyvani+  

E-Print Network [OSTI]

Design of Hybrid Distillation-Vapor Membrane Separation Systems. Jose A. Caballero*; Ignacio E (ethane, propane) on a commercial scale is performed almost exclusively by cryogenic distillation to optimize and retrofit a hybrid separation system consisting of a distillation column and a parallel

Grossmann, Ignacio E.

274

Application of Atmospheric Non Thermal Plasma-Catalysis Hybrid System for Air Pollution Control: Toluene removal.  

E-Print Network [OSTI]

1 Application of Atmospheric Non Thermal Plasma-Catalysis Hybrid System for Air Pollution Control for these technologies. As an alternative to conventional VOCs abatement techniques, atmospheric non-thermal plasma (NTP rue d'Issoudun, BP 6744, 45067 Orléans Cedex 02, France. Keywords: Non thermal Plasma, Catalysis

Paris-Sud XI, Université de

275

Optimization of hybrid-water/air-cooled condenser in an enhanced turbine geothermal ORC system  

Broader source: Energy.gov [DOE]

DOE Geothermal Program Peer Review 2010 - Presentation. Project objective: To improve the efficiency and output variability of geothermal-based ORC power production systems with minimal water consumption by deploying: 1) a hybrid-water/air cooled condenser with low water consumption and 2) an enhanced turbine with high efficiency.

276

Microsimulation analysis of a hybrid system model of multiple merge junction highway and semiautomatic vehicles  

E-Print Network [OSTI]

Microsimulation analysis of a hybrid system model of multiple merge junction highway and semi Abstract In this paper we present a protocol that controls semi­automated autonomous vehicles driving is in the merge lane) and the yielding (the vehicle is in the main lane). We show a simulation study that presents

Girault, Alain

277

Prototype-Based Tests for Hybrid Reactive Systems G. Hahn, J. Philipps  

E-Print Network [OSTI]

of models fits well with processes that rely on rapid, or evolutionary, proto- typing. The comparativelyPrototype-Based Tests for Hybrid Reactive Systems G. Hahn, J. Philipps Validas Model Validation AG¨unchen Germany Abstract Model-based testing relies on the use of behavior models to automatically generate

278

Comparative study of State Estimation of Fuel Cell Hybrid System Using UKF and EKF  

E-Print Network [OSTI]

of the most promising fuel cell technologies is the Solid Oxide Fuel Cell (SOFC) due to its solid state design nonlinear ex- amples are considered to compare the state estimation using UKF and EKF. A Solid Oxide FuelComparative study of State Estimation of Fuel Cell Hybrid System Using UKF and EKF Rambabu Kandepu

Foss, Bjarne A.

279

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 applicationsFuzzy Based Energy Management Control of A Hybrid Fuel Cell Auxiliary Power System M. Godoy Simões1

Simões, Marcelo Godoy

280

Syncretic Post-Biological Digital Identity: Hybridizing Mixed Reality Data Transfer Systems  

Science Journals Connector (OSTI)

This paper offers a contribution to an emerging culturally orientated discourse regarding mixed reality interaction. It seeks to analyse syncretic, hybridized agency, particularly in mixed reality data transfer systems. Recent developments in bridging ... Keywords: Art, Media art, Performing Arts, Metaverse, dual reality, cross-reality, transhumanism, post-humanism

Julian Stadon; Raphael Grasset

2011-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

A Hybrid Energy System Using Cascaded H-bridge Converter , Zhong Du2  

E-Print Network [OSTI]

schemes were developed to extract maximum wind power and charge/discharge the battery with fast dynamics proposes a hybrid energy system to integrate the variable-speed wind turbine, fuel cell, and battery using a cascaded H-bridge converter. One of the advantages of this topology is that it still can obtain

Tolbert, Leon M.

282

PCIM, Nrnberg, may 2003 FLYWHEEL ENERGY STORAGE SYSTEMS IN HYBRID AND  

E-Print Network [OSTI]

-scale storage of the type pumped hydro, compressed air, flow batteries, etc.), or even at the level of potentialPCIM, Nürnberg, may 2003 FLYWHEEL ENERGY STORAGE SYSTEMS IN HYBRID AND DISTRIBUTED ELECTRICITY of the electromechanical storage of energy over long operating cycles (with time constants ranging from several minutes

Boyer, Edmond

283

Hybrid robust predictive optimization method of power system dispatch  

DOE Patents [OSTI]

A method of power system dispatch control solves power system dispatch problems by integrating a larger variety of generation, load and storage assets, including without limitation, combined heat and power (CHP) units, renewable generation with forecasting, controllable loads, electric, thermal and water energy storage. The method employs a predictive algorithm to dynamically schedule different assets in order to achieve global optimization and maintain the system normal operation.

Chandra, Ramu Sharat (Niskayuna, NY); Liu, Yan (Ballston Lake, NY); Bose, Sumit (Niskayuna, NY); de Bedout, Juan Manuel (West Glenville, NY)

2011-08-02T23:59:59.000Z

284

Robust control strategies for hybrid solid oxide fuel cell systems.  

E-Print Network [OSTI]

??Solid Oxide Fuel Cell (SOFC) systems are electrochemical energy conversion devices characterized by the use of solid oxide as the electrolyte. They operate at high (more)

Mathew, Anju Ann

2010-01-01T23:59:59.000Z

285

Solar integration: applying hybrid photovoltaic/thermal systems.  

E-Print Network [OSTI]

??On-site energy production is becoming increasingly prevalent in building systems design with a renewed public awareness of sustainability, decreased energy resources, and an increase in (more)

Williams, Kristen

2010-01-01T23:59:59.000Z

286

A Hybrid Scheduling Approach for Scalable Heterogeneous Hadoop Systems  

E-Print Network [OSTI]

and available resources. I. INTRODUCTION Cloud computing promises three distinct characteristics: elastic performance. A common enterprise practice is to have a private Hadoop system installed on an intranet

Smith, Spencer

287

Hydraulic Fracturing in Particulate Materials.  

E-Print Network [OSTI]

??For more than five decades, hydraulic fracturing has been widely used to enhance oil and gas production. Hydraulic fracturing in solid materials (e.g., rock) has (more)

Chang, Hong

2004-01-01T23:59:59.000Z

288

A Hybrid System Solution Of The Interrupt Latency Compatibility Problem  

E-Print Network [OSTI]

Electronics Technical Center, Visteon Automotive Systems, 17000 Rotunda Drive, Dearborn, MI 48121-6010 Michael Michael J. Burke Electronics Technical Center, Visteon Automotive Systems, 17000 Rotunda Drive, Dearborn, MI 48121-6010 Copyright © 1997 Society of Automotive Engineers, Inc. ABSTRACT Microprocessors

Lin, Feng

289

Optimum use of renewable energy resources to generate electricity via hybrid system  

Science Journals Connector (OSTI)

The necessity of hybrid energy system is gaining more importance day by day as it incorporates two or more than two renewable energy resources that when integrated overcome limitations inherent in either. Hybrid energy system has been seen as an excellent solution for electrification of rural place where the grid extension is difficult and economically not feasible. Such system may consist of several renewable resources such as solar PV, wind, biomass, micro-hydro, geothermal and other conventional generator for back-up where the deficiency of one system can be compensated by others. This paper depicts the different system components and their optimal combination for the efficient generation of electrical energy exploiting locally available resources. The model discussed in paper compromises of micro-hydro, solar PV and biomass for the rural village in Nepal known as Kalikhola which is used as a case study. The optimised hybrid system shows a unit cost of $0.088/KWh which is obtained after the simulation considering contribution of individual renewable resources participating in the system.

Mahmud Abdul Matin Bhuiyan; Anand Mandal

2014-01-01T23:59:59.000Z

290

SciTech Connect: Thermal Hydraulic Characteristics of Fuel Defects...  

Office of Scientific and Technical Information (OSTI)

with experimental data from the Advanced Neutron Source Reactor Thermal Hydraulic Test Loop. The computational results for the High Flux Isotope Reactor core system provide a...

291

An Analysis of Hybrid Life Support Systems for Sustainable Habitats  

E-Print Network [OSTI]

The design of sustainable habitats on Earth, on other planetary surfaces, and in space, has motivated strategic planning with respect to life support (LS) system technology development and habitat design. Such planning ...

Shaw, Margaret Miller

2014-01-01T23:59:59.000Z

292

Fast time domain simulation for large order hybrid systems  

E-Print Network [OSTI]

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

Sou, Kin Cheong, 1979-

2002-01-01T23:59:59.000Z

293

Quantification of Gordona amarae Strains in Foaming Activated Sludge and Anaerobic Digester Systems with Oligonucleotide Hybridization Probes  

Science Journals Connector (OSTI)

...hierarchic classification system, Actinobacteria...hybridization probes for studies of ruminal microbial...pseudomonads. A taxonomic study. . Stratton H...ammonia-oxidizing bacteria. . Wheeler D. Rule A. . Zheng...microbial ecology studies. . Quantification...anaerobic digester systems with oligonucleotide...

M. Fiorella de los Reyes; Francis L. de los Reyes III; Mark Hernandez; Lutgarde Raskin

1998-07-01T23:59:59.000Z

294

The development of control strategy for solid oxide fuel cell and micro gas turbine hybrid power system in ship application  

Science Journals Connector (OSTI)

A solid oxide fuel cell (SOFC) and micro gas turbine (MGT) hybrid power system is a newly developed and promising power technology for ship power systems. Compared to conventional power plants on commercial sh...

Jiqing He; Peilin Zhou; David Clelland

2014-12-01T23:59:59.000Z

295

Multiobjective electric distribution system expansion planning using hybrid energy hub concept  

Science Journals Connector (OSTI)

This paper presents a novel approach for optimal electric distribution system expansion planning (OEDSEP) using a hybrid energy hub concept. The proposed method uses an energy hub model to explore the impacts of energy carrier systems on OEDSEP procedure. This algorithm decomposes the OEDSEP problem into three subproblems to achieve an optimal expansion planning of a system in which the investment and operational costs are minimized, while the reliability of the system is maximized. The algorithm was successfully tested in the present research for an urban distribution system.

Mehrdad Setayesh Nazar; Mahmood R. Haghifam

2009-01-01T23:59:59.000Z

296

A simple mathematical description of an off-grid hybrid solarwind power generating system  

Science Journals Connector (OSTI)

We give a detailed description of the energy balance equation for a stand-alone hybrid solarwind power generating system. The dimensions of the power generator and the energy capacity of a buffer battery (used as an energy storage system) are chosen to suit a known consumer's profile. Future applications of the mathematical model developed and analogies with a similar hydrodynamic problem are discussed.

M Blasone; F Dell'Anno; R De Luca; G Torre

2013-01-01T23:59:59.000Z

297

Berry phase and Hannays angle in the BornOppenheimer hybrid systems  

SciTech Connect (OSTI)

In this paper, we investigate the Berry phase and Hannays angle in the BornOppenheimer (BO) hybrid systems and obtain their algebraic expressions in terms of one form connection. The semiclassical relation of Berry phase and Hannays angle is discussed. We find that, besides the usual connection term, the Berry phase of quantum BO composite system also contains a novel term brought forth by the coupling induced effective gauge potential. This quantum modification can be viewed as an effective AharonovBohm effect. Moreover, the similar phenomenon is founded in Hannays angle of classical BO composite system, which indicates that the Berry phase and Hannays angle possess the same relation as the usual one. An example is used to illustrate our theory. This scheme can be used to generate artificial gauge potentials for neutral atoms. Besides, the quantumclassical hybrid BO system is also studied to compare with the results in full quantum and full classical composite systems. -- Highlights: We have derived the Berry phase and Hannays angle in BO hybrid systems. The Berry phase contains a novel term brought by the effective gauge potential. This mechanism can be used to generate artificial gauge potentials for neutral atoms. The relation between Hannays angles and Berry phases is established.

Liu, H.D. [National Laboratory of Science and Technology on Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)] [National Laboratory of Science and Technology on Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); Yi, X.X. [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)] [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China); Fu, L.B., E-mail: lbfu.iapcm@gmail.com [National Laboratory of Science and Technology on Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100084 (China)

2013-12-15T23:59:59.000Z

298

Economic analysis of standalone and grid connected hybrid energy systems  

Science Journals Connector (OSTI)

A pilot region was selected and cost analysis of using renewable energy sources with a hydrogen system for that regions energy demand is introduced, in a techno-economic perspective, in this paper. The renewable energy potential for the region was evaluated by implementing energy cost analysis. The study also evaluates the feasibility of utilizing solar and wind energy with hydrogen as a storage unit to meet the electricity requirements of the pilot region as a standalone system and in conjunction with the conventional grid based electricity. In order to simulate the operation of the system and to calculate the technical and economic parameters, micropower optimization program Homer (NREL, US) was used in this study. Homer requires some input values, such as technological options, cost of components, and resource compliance; and then the program ranges the feasible system configurations according to the net present cost (system cost) by using these inputs. The pilot region in this study, where the renewable based energy will be used, is determined to be Electrics & Electronics Faculty, Istanbul Technical University.

Belgin Emre Trkay; Ali Yasin Telli

2011-01-01T23:59:59.000Z

299

Hybrid GPS-GSM Localization of Automobile Tracking System  

E-Print Network [OSTI]

An integrated GPS-GSM system is proposed to track vehicles using Google Earth application. The remote module has a GPS mounted on the moving vehicle to identify its current position, and to be transferred by GSM with other parameters acquired by the automobile's data port as an SMS to a recipient station. The received GPS coordinates are filtered using a Kalman filter to enhance the accuracy of measured position. After data processing, Google Earth application is used to view the current location and status of each vehicle. This goal of this system is to manage fleet, police automobiles distribution and car theft cautions.

Al-Khedher, Mohammad A

2012-01-01T23:59:59.000Z

300

Optimization of a stand?alone Solar PV?Wind?DG Hybrid System for Distributed Power Generation at Sagar Island  

Science Journals Connector (OSTI)

An estimation of a stand?alone solar PV and wind hybrid system for distributed power generation has been made based on the resources available at Sagar island a remote area distant to grid operation. Optimization and sensitivity analysis has been made to evaluate the feasibility and size of the power generation unit. A comparison of the different modes of hybrid system has been studied. It has been estimated that Solar PV?Wind?DG hybrid system provides lesser per unit electricity cost. Capital investment is observed to be lesser when the system run with Wind?DG compared to Solar PV?DG.

P. C. Roy; A. Majumder; N. Chakraborty

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Capacity allocation of a hybrid energy storage system for power system peak shaving at high wind power penetration level  

Science Journals Connector (OSTI)

Abstract High wind power penetration in power system leads to a significant challenge in balancing power production and consumption due to the intermittence of wind. Introducing energy storage system in wind energy system can help offset the negative effects, and make the wind power controllable. However, the power spectrum density of wind power outputs shows that the fluctuations of wind energy include various components with different frequencies and amplitudes. This implies that the hybrid energy storage system is more suitable for smoothing out the wind power fluctuations effectively rather than the independent energy storage system. In this paper, we proposed a preliminary scheme for capacity allocation of hybrid energy storage system for power system peak shaving by using spectral analysis method. The unbalance power generated from load dispatch plan and wind power outputs is decomposed into four components, which are outer-day, intra-day, short-term and very short-term components, by using Discrete Fourier Transform (DFT) and spectral decomposition method. The capacity allocation can be quantified according to the information in these components. The simulation results show that the power rating and energy rating of hybrid energy storage system in partial smoothing mode decrease significantly in comparison with those in fully smoothing mode.

Pan Zhao; Jiangfeng Wang; Yiping Dai

2015-01-01T23:59:59.000Z

302

Berry phase and Hannay's angle in a quantum-classical hybrid system  

SciTech Connect (OSTI)

The Berry phase, which was discovered more than two decades ago, provides very deep insight into the geometric structure of quantum mechanics. Its classical counterpart, Hannay's angle, is defined if closed curves of action variables return to the same curves in phase space after a time evolution. In this paper we study the Berry phase and Hannay's angle in a quantum-classical hybrid system under the Born-Oppenheimer approximation. By the term quantum-classical hybrid system, we mean a composite system consists of a quantum subsystem and a classical subsystem. The effects of subsystem-subsystem couplings on the Berry phase and Hannay's angle are explored. The results show that the Berry phase has been changed sharply by the couplings, whereas the couplings have a small effect on the Hannay's angle.

Liu, H. D.; Wu, S. L.; Yi, X. X. [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)

2011-06-15T23:59:59.000Z

303

The development and application practice of windsolar energy hybrid generation systems in China  

Science Journals Connector (OSTI)

China is the largest developing country in the world. At present, more and more energy demand gives immense pressure to Chinese government. The inappropriate energy structure must be improved by Chinese government in order to achieve the sustainable development of economy and society. Development and application of renewable energy, such as wind energy, solar energy, biomass energy, etc., have been regarded by the government and the local people in the past 10 years, and more and more actual examples have been established, which are supported by government and plants in China. It is well known that there are abundant wind and solar resources in China. This paper presents the distribution zone and development and application practice status in China. However, a common drawback is existing in the stand-alone wind energy and solar energy generating power system, which is the unpredictable output electric power, and the output power depends on the unpredictable weather and climatic changes. Fortunately, the windsolar hybrid generation system can partially overcome the problems. The conventional structure and key technology of stand-alone windsolar hybrid generating system, the current status and outlook of windsolar hybrid energy system are presented in the paper, for example, the city road lighting system, distributed generation, photovoltaic (PV) water pumping for irrigation, etc. At the end, the policies and laws of China central government and local governments are described, and the development barriers and recommendations are introduced.

Li-qun Liu; Zhi-xin Wang

2009-01-01T23:59:59.000Z

304

A Computer Program Development for Sizing Stand-alone Photovoltaic-Wind Hybrid Systems  

Science Journals Connector (OSTI)

Abstract The exhaustion and all the drawbacks of fossil fuels are the main elements that led to the development and use of new alternativesfor power generation based on renewable energy,amongthem: photovoltaic energy systems, windenergy systems and their combination in a hybrid photovoltaic-wind system. In this paper we proposed a sizing approach of stand-alone Photovoltaic-Wind systems which is evaluated by the development of a computer applicationbased essentially on Loss of Power Supply Probability (LPSP) algorithmto provide an optimal technical-economic configuration. An example of a PV-Wind plant sizing is presented and discussed.

H. Belmili; M.F. Almi; B.Bendib; S. Bolouma

2013-01-01T23:59:59.000Z

305

RETRAN-02: a program for transient thermal-hydraulic analysis of complex fluid flow systems. Volume 1. Theory and numerics (Revision 2). [PWR; BWR  

SciTech Connect (OSTI)

RETRAN-02 represents a significant achievement in the development of a versatile and reliable computer program for use in best-estimate transient thermal-hydraulic analysis of LWR systems. The RETRAN-02 computer program is an extension of the RETRAN-01 program designed to provide analysis capabilities for: (1) BWR and PWR transients; (2) small-break loss-of-coolant accidents; (3) balance of plant modeling; and (4) anticipated transients without scram, while maintaining the analysis capabilities of the predecessor code. This report (the first of a four-volume computer code manual) describes the theory and numerical algorithms of the RETRAN-02 code. The three companion volumes describe the programming aspects, the programming details, and the verification and qualification performed with RETRAN.

McFadden, J.H.; Narum, R.E.; Peterson, C.E.; Noble, C.; Farman, R.F.; McClure, J.A.; Paulsen, M.P.; Richert, K.D.; Hughes, E.D.; Gose, G.C.

1984-11-01T23:59:59.000Z

306

Identifying the relative importance of energy and water costs in hydraulic transport systems through a combined physics- and cost-based indicator  

Science Journals Connector (OSTI)

Abstract Modern long distance ore pipeline systems are subject to strong costs, both from the economic and environmental standpoints. The task of assessing the relative importance of energy and water consumption without a detailed engineering analysis is often not obvious. In the present paper, the relative importance of water and energy unit costs is assessed by a novel dimensionless formulation accounting for the essential hydraulic and cost elements that conform the slurry transport. It is found that, for conditions resembling those of copper and iron concentrate pipelines, the ratio between energy and water costs has a wide range, depending on the particular transport conditions and unit cost scenarios. Although operating at similar volume fractions, results indicate that energy/water cost relations may differ between copper and iron concentrate pipelines and local conditions, thus suggesting the need to explicitly include energy and water cost in the design strategy.

Christian F. Ihle; Aldo Tamburrino; Santiago Montserrat

2014-01-01T23:59:59.000Z

307

Suspensions in hydraulic fracturing  

SciTech Connect (OSTI)

Suspensions or slurries are widely used in well stimulation and hydraulic fracturing processes to enhance the production of oil and gas from the underground hydrocarbon-bearing formation. The success of these processes depends significantly upon having a thorough understanding of the behavior of suspensions used. Therefore, the characterization of suspensions under realistic conditions, for their rheological and hydraulic properties, is very important. This chapter deals with the state-of-the-art hydraulic fracturing suspension technology. Specifically it deals with various types of suspensions used in well stimulation and fracturing processes, their rheological characterization and hydraulic properties, behavior of suspensions in horizontal wells, review of proppant settling velocity and proppant transport in the fracture, and presently available measurement techniques for suspensions and their merits. Future industry needs for better understanding of the complex behavior of suspensions are also addressed. 74 refs., 21 figs., 1 tab.

Shah, S.N. [Univ. of Oklahoma, Norman, OK (United States)

1996-12-31T23:59:59.000Z

308

Hydraulic Institute Member Benefits  

Broader source: Energy.gov [DOE]

As the developer of the universally acclaimed ANSI/HI Pump Standards, a key reference for pump knowledge and end-user specifications, the Hydraulic nstitute (HI) provides its members with timely...

309

A hybrid inventory management system respondingto regular demand and surge demand  

SciTech Connect (OSTI)

This paper proposes a hybrid policy for a stochastic inventory system facing regular demand and surge demand. The combination of two different demand patterns can be observed in many areas, such as healthcare inventory and humanitarian supply chain management. The surge demand has a lower arrival rate but higher demand volume per arrival. The solution approach proposed in this paper incorporates the level crossing method and mixed integer programming technique to optimize the hybrid inventory policy with both regular orders and emergency orders. The level crossing method is applied to obtain the equilibrium distributions of inventory levels under a given policy. The model is further transformed into a mixed integer program to identify an optimal hybrid policy. A sensitivity analysis is conducted to investigate the impact of parameters on the optimal inventory policy and minimum cost. Numerical results clearly show the benefit of using the proposed hybrid inventory model. The model and solution approach could help healthcare providers or humanitarian logistics providers in managing their emergency supplies in responding to surge demands.

Mohammad S. Roni; Mingzhou Jin; Sandra D. Eksioglu

2014-06-01T23:59:59.000Z

310

In-service performance and behavior characterization of the hybrid composite bridge system - a case study  

E-Print Network [OSTI]

The Hybrid Composite Beam (HCB) system is an innovative structural technology that has been recently used in bridge construction within the U.S. transportation network. In this system, the superstructure consists of a conventional reinforced concrete deck supported by Hybrid Composite Beams. Each beam is comprised of a glassfiber reinforced polymer (FRP) box shell containing a tied parabolic concrete arch. Inclined stirrups provide shear integrity and enforce composite action between the HCBs and the concrete deck. This paper focuses on evaluating the in-service performance of a newly constructed HCB bridge superstructure located on Route 205 in Colonial Beach, Virginia. A live load test was conducted using tandem axle dump trucks under both quasi-static and dynamic conditions. Results obtained from the experimental investigation were used to determine three key behavior characteristics. Dynamic amplification and lateral load distribution were found to be reasonable in comparison to the assumed design values....

Civitillo, John M; Gheitasi, Amir; Saliba, Mark; Kassner, Bernard L

2014-01-01T23:59:59.000Z

311

Hybrid methods for witnessing entanglement in a microscopic-macroscopic system  

SciTech Connect (OSTI)

We propose a hybrid approach to the experimental assessment of the genuine quantum features of a general system consisting of microscopic and macroscopic parts. We infer entanglement by combining dichotomic measurements on a bidimensional system and phase-space inference through the Wigner distribution associated with the macroscopic component of the state. As a benchmark, we investigate the feasibility of our proposal in a bipartite-entangled state composed of a single-photon and a multiphoton field. Our analysis shows that, under ideal conditions, maximal violation of a Clauser-Horne-Shimony-Holt-based inequality is achievable regardless of the number of photons in the macroscopic part of the state. The difficulty in observing entanglement when losses and detection inefficiency are included can be overcome by using a hybrid entanglement witness that allows efficient correction for losses in the few-photon regime.

Spagnolo, Nicolo [Dipartimento di Fisica, Sapienza Universita di Roma, Piazzale Aldo Moro 5, I-00185 Roma (Italy); Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Piazzale Aldo Moro 5, I-00185 Roma (Italy); Vitelli, Chiara [Dipartimento di Fisica, Sapienza Universita di Roma, Piazzale Aldo Moro 5, I-00185 Roma (Italy); Paternostro, Mauro [School of Mathematics and Physics, Queen's University, BT 7 1NN Belfast (United Kingdom); De Martini, Francesco [Dipartimento di Fisica, Sapienza Universita di Roma, Piazzale Aldo Moro 5, I-00185 Roma (Italy); Accademia Nazionale dei Lincei, via della Lungara 10, I-00165 Roma (Italy); Sciarrino, Fabio [Dipartimento di Fisica, Sapienza Universita di Roma, Piazzale Aldo Moro 5, I-00185 Roma (Italy); Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche (INO-CNR), largo E. Fermi 6, I-50125 Firenze (Italy)

2011-09-15T23:59:59.000Z

312

LiCl dehumidifier/LiBr absorption chiller hybrid air conditioning system with energy recovery  

SciTech Connect (OSTI)

This invention relates to a hybrid air conditioning system that combines a solar powered LiCl dehumidifier with a LiBr absorption chiller. The desiccant dehumidifier removes the latent load by absorbing moisture from the air, and the sensible load is removed by the absorption chiller. The desiccant dehumidifier is coupled to a regenerator and the desiccant in the regenerator is heated by solar heated hot water to drive the moisture therefrom before being fed back to the dehumidifier. The heat of vaporization expended in the desiccant regenerator is recovered and used to partially preheat the driving fluid of the absorption chiller, thus substantially improving the overall COP of the hybrid system.

Ko, S.M.

1980-06-03T23:59:59.000Z

313

LiCl dehumidifier LiBr absorption chiller hybrid air conditioning system with energy recovery  

SciTech Connect (OSTI)

This invention relates to a hybrid air conditioning system that combines a solar powered LiCl dehumidifier with a LiBr absorption chiller. The desiccant dehumidifier removes the latent load by absorbing moisture from the air, and the sensible load is removed by the absorption chiller. The desiccant dehumidifier is coupled to a regenerator and the desiccant in the regenerator is heated by solar heated hot water to drive the moisture therefrom before being fed back to the dehumidifier. The heat of vaporization expended in the desiccant regenerator is recovered and used to partially preheat the driving fluid of the absorption chiller, thus substantially improving the overall COP of the hybrid system. 4 figs.

Ko, S.M.

1980-06-03T23:59:59.000Z

314

Thermosyphon Cooler Hybrid System Providing Water Resiliency in a typical Chemical Plant  

E-Print Network [OSTI]

1Thermosyphon Cooler Hybrid System Providing Water Resiliency in a Typical Chemical Plant Presentation to the: May 21, 2014 Thomas P. Carter, P.E. Sr. Program Manager, Heat Rejection Technology Johnson Controls, Building Efficiency thomas....p.carter@jci.com ESL-IE-14-05-20 Proceedings of the Thrity-Sixth Industrial Energy Technology Conference New Orleans, LA. May 20-23, 2014 2Johnson Controls is a globally diversified company in the building and automotive industries Automotive Experience...

Carter, T. P.

2014-01-01T23:59:59.000Z

315

Progress towards accelerating HOMME on hybrid multi- core systems  

SciTech Connect (OSTI)

The suitability of a spectral element based dynamical core (HOMME) within the Community Atmospheric Model (CAM) for GPU-based architectures is examined and initial performance results are reported. This work was done within a project to enable CAM to run at high resolution on next generation, multi-petaflop systems. The dynamical core is the present focus because it dominates the performance profile of our target problem. HOMME enjoys good scalability due to its underlying cubed-sphere mesh with full two-dimensional decomposition and the localization of all computational work within each element. The thread blocking and code changes that allow HOMME to effectively use GPUs are described along with a rewritten vertical remapping scheme which improves performance on both CPUs and GPUs. Validation of results in the full HOMME model is also described. Remaining issues affecting performance include optimizing the boundary exchanges for the case of multiple spectral elements being computed on the GPU and using multiple CUDA streams to overlap data transfers with computations.

Archibald, Richard K [ORNL; Carpenter, Ilene L [ORNL; Evans, Katherine J [ORNL; Larkin, Jeff [Cray, Inc.; Micikevicius, Paulius [ORNL; Rosinski, James [NOAA, Boulder, CO; Schwarzmeier, James L [ORNL; Taylor, Mark [Sandia National Laboratories (SNL)

2011-01-01T23:59:59.000Z

316

AN ADJUSTABLE SHORT SLOT HYBRID FOR PRECISE RF POWER DIVIDER SYSTEM  

E-Print Network [OSTI]

INJECTOR CAVITIES V. Veshcherevich INTRODUCTION In Cornell Energy Recovery Linac (ERL) project [1], each of hybrids seems to have better electrical properties compared with other four-port hybrid designs: low of the hybrid. The terminating ports of the hybrid will be the standard WR650 waveguide ports. SHORT SLOT HYBRID

317

COMPARATIVE STUDY AMONG HYBRID GROUND SOURCE HEAT PUMP SYSTEM, COMPLETE GROUND SOURCE HEAT PUMP AND CONVENTIONAL HVAC SYSTEM  

SciTech Connect (OSTI)

In this paper, a hotel with hybrid geothermal heat pump system (HyGSHP) in the Pensacola is selected and simulated by the transient simulation software package TRNSYS [1]. To verify the simulation results, the validations are conducted by using the monthly average entering water temperature, monthly facility consumption data, and etc. And three types of HVAC systems are compared based on the same building model and HVAC system capacity. The results are presented to show the advantages and disadvantages of HyGSHP compared with the other two systems in terms of energy consumptions, life cycle cost analysis.

Jiang Zhu; Yong X. Tao

2011-11-01T23:59:59.000Z

318

Technological Advances in Hydraulic Drive Trains for Wind Turbines  

Science Journals Connector (OSTI)

The reliability of frequency converters is a major concern for wind turbines. ChapDrive AS has built and tested a hydraulic drive train for variable speed wind turbines which includes a synchronous generator that is connected to the grid without the use of a frequency converter. The hydraulic drive train consists of a hydraulic pump, a variable displacement hydraulic motor, and a synchronous generator, which enables rotor speed control while maintaining synchronous speed of the generator. It has been proven that the hydraulic drive train and the ChapDrive Control system are able to absorb fluctuations in the wind speed and maintain a constant power output without the use of frequency converters. The hydraulic drive train and the ChapDrive Control system has been modeled analytically and compared to measurements, demonstrating a good agreement between simulations and measurements.

K.E.Thomsen; O.G. Dahlhaug; M.O.K. Niss; S.K. Haugset

2012-01-01T23:59:59.000Z

319

Hybrid control of networked embedded systems A. Balluchi, L. Benvenuti, S. Engell, T. Geyer, K.H. Johansson,  

E-Print Network [OSTI]

: Control of power systems, industrial process control, design of automotive electronics and communication an important role in applications to avionics, automated highways, communication networks, automotive control of hybrid control: control of power electronics (Section 3), industrial process control (Section 4

Johansson, Karl Henrik

320

Renewable energy powered membrane technology. 2. The effect of energy fluctuations on performance of a photovoltaic hybrid membrane system  

E-Print Network [OSTI]

This paper reports on the performance fluctuations during the operation of a batteryless hybrid ultrafiltration nanofiltration / reverse osmosis (UF-NF/RO) membrane desalination system powered by photovoltaics treating ...

Richards, B.S.; Capo, D.P.S.; Schfer, Andrea

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Optimization of Electric Power Systems for Off-Grid Domestic Applications: An Argument for Wind/Photovoltaic Hybrids  

SciTech Connect (OSTI)

The purpose of this research was to determine the optimal configuration of home power systems relevant to different regions in the United States. The hypothesis was that, regardless of region, the optimal system would be a hybrid incorporating wind technology, versus a photovoltaic hybrid system without the use of wind technology. The method used in this research was HOMER, the Hybrid Optimization Model for Electric Renewables. HOMER is a computer program that optimizes electrical configurations under user-defined circumstances. According to HOMER, the optimal system for the four regions studied (Kansas, Massachusetts, Oregon, and Arizona) was a hybrid incorporating wind technology. The cost differences between these regions, however, were dependent upon regional renewable resources. Future studies will be necessary, as it is difficult to estimate meteorological impacts for other regions.

Jennings, W.; Green, J.

2001-01-01T23:59:59.000Z

322

Optimization and sensitivity analysis of a PV/Wind/Diesel hybrid system for a rural community in the pacific  

Science Journals Connector (OSTI)

This work looks at the feasibility of a standalone hybrid power generation system for providing power to a rural community in the Pacific Islands. The optimization and sensitivity analysis of a proposed PV/Win...

Vikash Reddy; Atul Raturi

2010-06-01T23:59:59.000Z

323

Potential and economic viability of standalone hybrid systems for a rural community of Sokoto, North-west Nigeria  

Science Journals Connector (OSTI)

An assessment of the potential and economic viability of standalone hybrid systems for an off-grid rural community of ... Meteorological Department, Oshodi, Lagos (daily mean wind speeds, and daily global solar r...

O. D. Ohijeagbon; Oluseyi. O. Ajayi

2014-06-01T23:59:59.000Z

324

Nuclear-Renewable Hybrid System Economic Basis for Electricity, Fuel, and Hydrogen  

SciTech Connect (OSTI)

Concerns about climate change and altering the ocean chemistry are likely to limit the use of fossil fuels. That implies a transition to a low-carbon nuclear-renewable electricity grid. Historically variable electricity demand was met using fossil plants with low capital costs, high operating costs, and substantial greenhouse gas emissions. However, the most easily scalable very-low-emissions generating options, nuclear and non-dispatchable renewables (solar and wind), are capital-intensive technologies with low operating costs that should operate at full capacities to minimize costs. No combination of fully-utilized nuclear and renewables can meet the variable electricity demand. This implies large quantities of expensive excess generating capacity much of the time. In a free market this results in near-zero electricity prices at times of high nuclear renewables output and low electricity demand with electricity revenue collapse. Capital deployment efficiencythe economic benefit derived from energy systems capital investment at a societal levelstrongly favors high utilization of these capital-intensive systems, especially if low-carbon nuclear renewables are to replace fossil fuels. Hybrid energy systems are one option for better utilization of these systems that consumes excess energy at times of low prices to make some useful product.The economic basis for development of hybrid energy systems is described for a low-carbon nuclear renewable world where much of the time there are massivequantities of excess energy available from the electric sector.Examples include (1) high-temperature electrolysis to generate hydrogen for non-fossil liquid fuels, direct use as a transport fuel, metal reduction, etc. and (2) biorefineries.Nuclear energy with its concentrated constant heat output may become the enabling technology for economically-viable low-carbon electricity grids because hybrid nuclear systems may provide an economic way to produce dispatachable variable electricity with economic base-load operation of the reactor.

Charles Forsberg; Steven Aumeier

2014-04-01T23:59:59.000Z

325

Evaluation of 2004 Toyota Prius Hybrid Electric Drive System Interim Report  

SciTech Connect (OSTI)

Laboratory tests were conducted to evaluate the electrical and mechanical performance of the 2004 Toyota Prius and its hybrid electric drive system. As a hybrid vehicle, the 2004 Prius uses both a gasoline-powered internal combustion engine and a battery-powered electric motor as motive power sources. Innovative algorithms for combining these two power sources results in improved fuel efficiency and reduced emissions compared to traditional automobiles. Initial objectives of the laboratory tests were to measure motor and generator back-electromotive force (emf) voltages and determine gearbox-related power losses over a specified range of shaft speeds and lubricating oil temperatures. Follow-on work will involve additional performance testing of the motor, generator, and inverter. Information contained in this interim report summarizes the test results obtained to date, describes preliminary conclusions and findings, and identifies additional areas for further study.

Ayers, C.W.

2004-11-23T23:59:59.000Z

326

Self-potential observations during hydraulic fracturing  

E-Print Network [OSTI]

potential measurements during hydraulic fracturing of BunterMonitoring during hydraulic fracturing using the TG-2 well,fracture processes in hydraulic fracturing, Quarterly Report

Moore, J R; Glaser, Steven D

2007-01-01T23:59:59.000Z

327

Hydraulic Fracturing Poster | Department of Energy  

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

Hydraulic Fracturing Poster Hydraulic Fracturing Poster Educational poster graphically displaying the key components of hydraulic fracturing. Teachers: If you would like hard...

328

Self-potential observations during hydraulic fracturing  

E-Print Network [OSTI]

potential measurements during hydraulic fracturing of BunterMonitoring during hydraulic fracturing using the TG-2 well,fracture processes in hydraulic fracturing, Quarterly Report

Moore, Jeffrey R.; Glaser, Steven D.

2008-01-01T23:59:59.000Z

329

Self-potential observations during hydraulic fracturing  

E-Print Network [OSTI]

potential measurements during hydraulic fracturing of BunterSP response during hydraulic fracturing. Citation: Moore, J.observations during hydraulic fracturing, J. Geophys. Res. ,

Moore, J R; Glaser, Steven D

2007-01-01T23:59:59.000Z

330

ToF-SIMS evaluation of calcium-containing silica/?-PGA hybrid systems for bone regeneration  

Science Journals Connector (OSTI)

Abstract Inorganic/organic hybrids have great potential for the production of bioactive scaffolds which have tailored mechanical properties and degradation rates suitable for tissue engineering. For bone regeneration, calcium incorporation into hybrids at low temperatures is important due to its ability to stimulate new bone formation. As a consequence, understanding the homogeneity of the critical inorganic and organic components will be the key to the development of such hybrids. The aim of this interdisciplinary study was to use time-of-flight secondary ion mass spectrometry (ToF-SIMS) to determine the homogeneity of these critical components. We evaluated various solgel silica/?-polyglutamic acid (?-PGA) hybrid systems produced using different routes to introduce the calcium, thereby tailoring and optimizing hybrid syntheses and processing routes. Dimethyl carbonate (DMC) was used to improve the inorganic/organic coupling and its influence on the homogeneity of the hybrid structures was also examined. The results revealed that the calcium salt form of ?-PGA was promising for calcium incorporation since homogeneous products could be obtained. The ToF-SIMS data also indicated that the reaction time of hybrid synthesis and the timing of the addition of DMC can affect the homogeneity of hybrids.

Daming Wang; Jin Nakamura; Gowsihan Poologasundarampillai; Toshihiro Kasuga; Julian R. Jones; David S. McPhail

2014-01-01T23:59:59.000Z

331

Power management of hybrid micro-grid system by a generic centralized supervisory control scheme  

Science Journals Connector (OSTI)

Abstract This paper presents a generic centralized supervisory control scheme for the power management of multiple power converters based hybrid micro-grid system. The system consists of wind generators, photovoltaic system, multiple parallel connected power converters, utility grid, ac and dc loads. Power management of the micro-grid is performed under two cases: grid mode and local mode. Central supervisory unit (CSU) generates command signal to ensure the power management during the two modes. In local mode, the dc loads in the acdc hybrid system can be controlled. In the case of grid mode operation, power flow between the utility grid and micro-grid is controlled. A novel feature of this paper is the incorporation of the multiple power converters. The generated command signal from the CSU can also control the operation of the multiple power converters in both grid and local modes. An additional feature is the incorporation of sodium sulfur battery energy storage system (NAS BESS) which is used to smooth the output power fluctuation of the wind farm. The effectiveness of the control scheme is also verified using real time load pattern. The simulation is performed in PSCAD/EMTDC.

Mir Nahidul Ambia; Ahmed Al-Durra; Cedric Caruana; S.M. Muyeen

2014-01-01T23:59:59.000Z

332

Chapter 9 - Hydraulic Turbines  

Science Journals Connector (OSTI)

This chapter covers the following topics: Features of hydraulic turbines; Early history and development; Efficiency of various types of turbine; Size of the various turbine types; The Pelton wheel turbine and controlling its speed; Energy losses; Reaction turbines; The Francis and the Kaplan turbines; Calculation of performance; Effect of size on the performance of hydraulic turbines; Cavitation and its avoidance; Calculation of the various specific speeds of turbines; The Wells turbine- Design and performance variables; Tidal power turbines- The SeaGen tidal turbine and its operational principles.

S.L. Dixon; C.A. Hall

2014-01-01T23:59:59.000Z

333

Initial results from the operation of village hybrid systems in Chile  

SciTech Connect (OSTI)

The government of Chile has undertaken a rural electrification program to electrify 75% of the population by the year 2000. Renewable energy is considered within this program, and its application facilitated through a technical cooperation agreement between Chile`s national energy commission (CNE) and the U.S. Department of Energy. In order to introduce isolated mini-grid hybrid wind-energy systems into Chile, three pilot projects were implemented in Region IX. The goal of the pilot systems is to establish renewables as a viable option for rural electrification in the Chilean context. In this paper we report on the first six months of three pilot projects. Presented as background information are brief descriptions of the power systems, data acquisition systems, and the operation and maintenance (O&M) protocols. Analyses of loads, component performance, system operation, and balance of payments for O&M are the primary points presented. Important lessons learned and future plans are also discussed.

Holz, R.; Baring-Gould, E.I.; Corbus, D. [and others

1997-08-01T23:59:59.000Z

334

Strategic Need for Multi-Purpose Thermal Hydraulic Loop for Support of Advanced Reactor Technologies  

SciTech Connect (OSTI)

This report presents a conceptual design for a new high-temperature multi fluid, multi loop test facility for the INL to support thermal hydraulic, materials, and thermal energy storage research for nuclear and nuclear-hybrid applications. In its initial configuration, the facility will include a high-temperature helium loop, a liquid salt loop, and a hot water/steam loop. The three loops will be thermally coupled through an intermediate heat exchanger (IHX) and a secondary heat exchanger (SHX). Research topics to be addressed with this facility include the characterization and performance evaluation of candidate compact heat exchangers such as printed circuit heat exchangers (PCHEs) at prototypical operating conditions, flow and heat transfer issues related to core thermal hydraulics in advanced helium-cooled and salt-cooled reactors, and evaluation of corrosion behavior of new cladding materials and accident-tolerant fuels for LWRs at prototypical conditions. Based on its relevance to advanced reactor systems, the new facility has been named the Advanced Reactor Technology Integral System Test (ARTIST) facility. Research performed in this facility will advance the state of the art and technology readiness level of high temperature intermediate heat exchangers (IHXs) for nuclear applications while establishing the INL as a center of excellence for the development and certification of this technology. The thermal energy storage capability will support research and demonstration activities related to process heat delivery for a variety of hybrid energy systems and grid stabilization strategies. Experimental results obtained from this research will assist in development of reliable predictive models for thermal hydraulic design and safety codes over the range of expected advanced reactor operating conditions. Proposed/existing IHX heat transfer and friction correlations and criteria will be assessed with information on materials compatibility and instrumentation needs. The experimental database will guide development of appropriate predictive methods and be available for code verification and validation (V&V) related to these systems.

James E. O'Brien; Piyush Sabharwall; Su-Jong Yoon; Gregory K. Housley

2014-09-01T23:59:59.000Z

335

Hydraulic manipulator design, analysis, and control at Oak Ridge National Laboratory  

SciTech Connect (OSTI)

To meet the increased payload capacities demanded by present-day tasks, manipulator designers have turned to hydraulics as a means of actuation. Hydraulics have always been the actuator of choice when designing heavy-life construction and mining equipment such as bulldozers, backhoes, and tunneling devices. In order to successfully design, build, and deploy a new hydraulic manipulator (or subsystem) sophisticated modeling, analysis, and control experiments are usually needed. To support the development and deployment of new hydraulic manipulators Oak Ridge National Laboratory (ORNL) has outfitted a significant experimental laboratory and has developed the software capability for research into hydraulic manipulators, hydraulic actuators, hydraulic systems, modeling of hydraulic systems, and hydraulic controls. The hydraulics laboratory at ORNL has three different manipulators. First is a 6-Degree-of-Freedom (6-DoF), multi-planer, teleoperated, flexible controls test bed used for the development of waste tank clean-up manipulator controls, thermal studies, system characterization, and manipulator tracking. Finally, is a human amplifier test bed used for the development of an entire new class of teleoperated systems. To compliment the hardware in the hydraulics laboratory, ORNL has developed a hydraulics simulation capability including a custom package to model the hydraulic systems and manipulators for performance studies and control development. This paper outlines the history of hydraulic manipulator developments at ORNL, describes the hydraulics laboratory, discusses the use of the equipment within the laboratory, and presents some of the initial results from experiments and modeling associated with these hydraulic manipulators. Included are some of the results from the development of the human amplifier/de-amplifier concepts, the characterization of the thermal sensitivity of hydraulic systems, and end-point tracking accuracy studies. Experimental and analytical results are included.

Kress, R.L.; Jansen, J.F. [Oak Ridge National Lab., TN (United States). Robotics and Process Systems Div.; Love, L.J. [Oak Ridge Inst. for Science and Education, TN (United States); Basher, A.M.H. [South Carolina State Univ., Orangeburg, SC (United States)

1996-09-01T23:59:59.000Z

336

Current status of research on optimum sizing of stand-alone hybrid solarwind power generation systems  

Science Journals Connector (OSTI)

Solar and wind energy systems are omnipresent, freely available, environmental friendly, and they are considered as promising power generating sources due to their availability and topological advantages for local power generations. Hybrid solarwind energy systems, uses two renewable energy sources, allow improving the system efficiency and power reliability and reduce the energy storage requirements for stand-alone applications. The hybrid solarwind systems are becoming popular in remote area power generation applications due to advancements in renewable energy technologies and substantial rise in prices of petroleum products. This paper is to review the current state of the simulation, optimization and control technologies for the stand-alone hybrid solarwind energy systems with battery storage. It is found that continued research and development effort in this area is still needed for improving the systems performance, establishing techniques for accurately predicting their output and reliably integrating them with other renewable or conventional power generation sources.

Wei Zhou; Chengzhi Lou; Zhongshi Li; Lin Lu; Hongxing Yang

2010-01-01T23:59:59.000Z

337

Self-learning control system for plug-in hybrid vehicles  

DOE Patents [OSTI]

A system is provided to instruct a plug-in hybrid electric vehicle how optimally to use electric propulsion from a rechargeable energy storage device to reach an electric recharging station, while maintaining as high a state of charge (SOC) as desired along the route prior to arriving at the recharging station at a minimum SOC. The system can include the step of calculating a straight-line distance and/or actual distance between an orientation point and the determined instant present location to determine when to initiate optimally a charge depleting phase. The system can limit extended driving on a deeply discharged rechargeable energy storage device and reduce the number of deep discharge cycles for the rechargeable energy storage device, thereby improving the effective lifetime of the rechargeable energy storage device. This "Just-in-Time strategy can be initiated automatically without operator input to accommodate the unsophisticated operator and without needing a navigation system/GPS input.

DeVault, Robert C [Knoxville, TN

2010-12-14T23:59:59.000Z

338

Principles of passive and active cooling of mirror-based hybrid systems employing liquid metals  

SciTech Connect (OSTI)

This paper presents principles of passive and active cooling that are suitable to mirrorbased hybrid, nuclear fission/fusion systems. It is shown that liquid metal lead-bismuth cooling of the mirror machine with 25 m height and 1.5 GW thermal power is feasible both in the active mode during the normal operation and in the passive mode after the reactor shutdown. In the active mode the achievable required pumping power can well be below 50 MW, whereas the passive mode provides enough coolant flow to keep the clad temperature below the damage limits.

Anglart, Henryk [Div. of Nuclear Technology, School of Engineering Sciences, Royal Institute of Technology Roslagstullsbacken 21, 106-91 Stockholm (Sweden)

2012-06-19T23:59:59.000Z

339

Method of converting an existing vehicle powertrain to a hybrid powertrain system  

DOE Patents [OSTI]

A method of converting an existing vehicle powertrain including a manual transmission to a hybrid powertrain system with an automated powertrain transmission. The first step in the method of attaching a gear train housing to a housing of said manual transmission, said gear train housing receiving as end of drive shaft of said transmission and rotatably supporting a gear train assembly. Secondly, mounting an electric motor/generator to said gear train housing and attaching a motor/generator drive shaft of said electric motor/generator to said gear train assembly. Lastly, connecting an electro-mechanical clutch actuator to a friction clutch mechanism of said manual transmission.

Reed, Jr., Richard G. (Royal Oak, MI); Boberg, Evan S. (Hazel Park, MI); Lawrie, Robert E. (Whitmore Lake, MI); Castaing, Francois J. (Bloomfield Township, MI)

2001-12-25T23:59:59.000Z

340

A hybrid superconducting fault current limiter for enhancing transient stability in Korean power systems  

Science Journals Connector (OSTI)

Abstract Additional power generation sites have been limited in Korea, despite the fact load demands are gradually increasing. In order to meet these increasing demands, Koreas power system company has begun constructing new generators at existing sites. Thus, multi-unit plants can create problems in terms of transient stability when a large disturbance occurs. This paper proposes a hybrid superconducting fault current limiter (SFCL) application to enhance the transient stability of multi-unit power plants. \\{SFCLs\\} reduce fault currents, and limitation currents decrease the imbalance of the mechanical and electrical torque of the generators, resulting in an improvement in transient stability.

Sangsoo Seo; Seog-Joo Kim; Young-Hwan Moon; Byongjun Lee

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

In-service performance and behavior characterization of the hybrid composite bridge system - a case study  

E-Print Network [OSTI]

The Hybrid Composite Beam (HCB) system is an innovative structural technology that has been recently used in bridge construction within the U.S. transportation network. In this system, the superstructure consists of a conventional reinforced concrete deck supported by Hybrid Composite Beams. Each beam is comprised of a glassfiber reinforced polymer (FRP) box shell containing a tied parabolic concrete arch. Inclined stirrups provide shear integrity and enforce composite action between the HCBs and the concrete deck. This paper focuses on evaluating the in-service performance of a newly constructed HCB bridge superstructure located on Route 205 in Colonial Beach, Virginia. A live load test was conducted using tandem axle dump trucks under both quasi-static and dynamic conditions. Results obtained from the experimental investigation were used to determine three key behavior characteristics. Dynamic amplification and lateral load distribution were found to be reasonable in comparison to the assumed design values. The testing program also included internal and external measurement systems to help characterize the load sharing behavior of the HCB on an element level. The main load carrying elements are the deck in compression and the steel ties in tension, and the FRP shell did not act compositely with the internal components.

John M. Civitillo; Devin K. Harris; Amir Gheitasi; Mark Saliba; Bernard L. Kassner

2014-09-08T23:59:59.000Z

342

RETRAN-02: A program for transient thermal-hydraulic analysis of complex fluid flow systems: Volume 1, Theory and numerics (Revision 4)  

SciTech Connect (OSTI)

RETRAN-02 represents a significant achievement in the development of a versatile and reliable computer program for use in best-estimate transient thermal-hydraulic analysis of light water reactor systems. The RETRAN-02 computer program is an extension of the RETRAN-01 program designed to provide analysis capabilities for (1) BWR and PWR transients, (2) small break loss of coolant accidents, (3) balance of plant modeling, and (4) anticipated transients without scram, while maintaining the analysis capabilities of the predecessor code. The RETRAN-02 computer code is constructed in a semimodular and dynamic dimensioned form where additions to the code can be easily carried out as new and improved models are developed. The NRC, at the request of a group of utilities, had Argonne National Laboratory perform a technical review of RETRAN-01 MOD003 and RETRAN-02 MOD002. This review was completed in May 1983, and the NRC issued a Safety Evaluation Report on RETRAN in September 1984. Revision 4 of the RETRAN-02 computer code manuals describes the MOD005 version of the code. This report (the first of a four-volume computer code manual) describes the theory and numerical algorithms of the RETRAN-02 code. The three companion volumes describe the programming details, the user input requirements and sample problem input and output files, and the verification and qualification performed with RETRAN. 186 refs., 75 figs., 30 tabs.

McFadden, J.H.; Narum, R.E.; Peterson, C.E.; Noble, C.; Farman, R.F.; McClure, J.A.; Paulsen, M.P.; Richert, K.D.; Hughes, E.D.; Gose, G.C.

1988-11-01T23:59:59.000Z

343

Performance characteristics of a MW-class SOFC/GT hybrid system based on a commercially available gas turbine  

Science Journals Connector (OSTI)

The ultimate purpose of a SOFC/GT hybrid system is for distributed power generation applications. Therefore, this study investigates the possible extension of a SOFC/GT hybrid system to multi-MW power cases. Because of the matured technology of gas turbines and their commercial availability, it was reasonable to construct a hybrid system with an off-the-shelf gas turbine. Based on a commercially available gas turbine, performance analysis was conducted to find the total appropriate power for the hybrid system with consideration of the maximum allowable cell temperature. In order to maintain high performance characteristics of the hybrid system during part-load operations, it was necessary to find the optimal control strategy for the system according to the change in power required. The results of the performance analysis for part-load conditions showed that supplied fuel and air must be changed simultaneously. Furthermore, in order to prevent performance degradation, it was found that both cell temperature and turbine inlet temperature must be maintained as close as possible to design-point conditions.

Tae Won Song; Jeong Lak Sohn; Tong Seop Kim; Sung Tack Ro

2006-01-01T23:59:59.000Z

344

STATEMENT OF CONSIDERATIONS REQUEST BY HYBRID POWER GENERATION SYSTEMS, LLC, FOR AN  

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

UNDER UNDER DOE COOPERATIVE AGREEMENT NO. DE-FC26-01NT41245; W(A)-03-016, CH-1141 The Petitioner, Hybrid Power Generation Systems, LLC, a wholly owned subsidiary of General Electric Company (GE HPGS), was awarded this cooperative agreement for the performance of work entitled, "Solid State Energy Conversion Alliance (SECA) Solid Oxide Fuel Cell Program (SOFC)." The purpose of the cooperative agreement is to develop a fuel-flexible and modular system (3 to 10kW) that can serve as the basis for configuring and crating low-cost, highly efficient, and environmentally benign power plants tailored to specific markets. A second purpose is to assemble and test a packaged system based on the baseline design for a selected specified application and demonstrate cost projections and required operating characteristics.

345

Reliability Analysis of Electric Power Systems Using an Object-oriented Hybrid Modeling Approach  

E-Print Network [OSTI]

The ongoing evolution of the electric power systems brings about the need to cope with increasingly complex interactions of technical components and relevant actors. In order to integrate a more comprehensive spectrum of different aspects into a probabilistic reliability assessment and to include time-dependent effects, this paper proposes an object-oriented hybrid approach combining agent-based modeling techniques with classical methods such as Monte Carlo simulation. Objects represent both technical components such as generators and transmission lines and non-technical components such as grid operators. The approach allows the calculation of conventional reliability indices and the estimation of blackout frequencies. Furthermore, the influence of the time needed to remove line overloads on the overall system reliability can be assessed. The applicability of the approach is demonstrated by performing simulations on the IEEE Reliability Test System 1996 and on a model of the Swiss high-voltage grid.

Schlpfer, Markus; Krger, Wolfgang

2012-01-01T23:59:59.000Z

346

Hybrid electrodialysis reverse osmosis system design and its optimization for treatment of highly saline brines  

E-Print Network [OSTI]

The demand is rising for desalination technologies to treat highly saline brines arising from hydraulic fracturing processes and inland desalination. Interest is growing in the use of electrical desalination technologies ...

McGovern, Ronan Killian

347

Advanced photovoltaic/hydro hybrid renewable energy system for remote areas  

Science Journals Connector (OSTI)

This paper presents modeling and simulation of the advanced photovoltaic (PV)/hydro based Hybrid Renewable Energy System (HRES) to electrify such isolated/remote areas where grid accessibility is not possible. For 7.5?kW hydro generation system a Self Excited Induction Generator (SEIG) with improved technique is used to optimize the utilization of hydro power. To achieve this aim an uncontrolled bridge rectifier coupled with Hydro side Voltage Source Inverter is implemented for the SEIG based advanced hydro system. The PV system is configured by PV array battery DC/DC converter maximum power point tracking controller and PV side Voltage Source Inverter. A Constant Current Control scheme is developed in this paper to control active and reactive power flow and to synchronize hydro and PV systems. The proposed system uses fewer controlled switches hence complexity of control has been reduced and system has higher efficiency and lower switching losses. The performance analysis of the HRES has been done to authenticate the existence of the system using the MATLAB software and results demonstrate that power quality of the proposed system is better and HRES is able to put into services.

2014-01-01T23:59:59.000Z

348

CFD simulating the transient thermalhydraulic characteristics in a 17נ17 bundle for a spent fuel pool under the loss of external cooling system accident  

Science Journals Connector (OSTI)

Abstract This paper develops a three-dimensional (3-D) transient computational fluid dynamics (CFD) model to simulate the thermalhydraulic characteristics in a fuel bundle located in a spent fuel pool (SFP) under the loss of external cooling system accident. The SFP located in the Maanshan nuclear power plant (NPP) is selected herein. Without adopting the porous media approach usually used in the previous CFD works, this model uses a real-geometry simulation of a 17נ17 fuel bundle, which can obtain the localized distributions of the flow and heat transfer during the accident. These distribution characteristics include several peaks in the axial distributions of flow, pressure, temperature, and Nusselt number (Nu) near the support grids, the non-uniform distribution of secondary flow, and the non-uniform temperature distribution due to flow mixing between rods, etc. According to the conditions adopted in the Procedure 597.1 (MNPP Plant Procedure 597.1, 2010) for the management of the loss-of-cooling event of the spent fuel pool in the Maanshan NPP, the temperature rising rate predicted by the present model can be equivalent to 1.26K/h, which is the same order as that of 3.5K/h in the this procedure. This result also confirms that the temperature rising rate used in the Procedure 597.1 for the Maanshan NPP is conservative. In addition, after the loss of external cooling system, there are about 44h for the operator to repair the malfunctioning system or provide the alternative water source for the pool inventory to avoid the occurrence of the local boiling in the SFP based on the present predicted temperature rising rate.

S.R. Chen; W.C. Lin; Y.M. Ferng; C.C. Chieng; B.S. Pei

2014-01-01T23:59:59.000Z

349

The Hydraulic Institute: Who We Are  

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

Hydraulic Institute: Hydraulic Institute: Who We Are The Global Authority on Pumps and Pumping Systems As the developer of the universally acclaimed ANSI/HI Pump Standards, a key reference for pump knowledge and end-user specifications, the Hydraulic Institute (HI) provides its members with timely and essential resources for the advancement of their pump industry businesses. HI is also an indispensable asset for business intelligence, professional development, and pump industry leadership and advocacy, serving as the unequivocal voice of the North American pump industry since its inception in 1917. The Institute has become the industry resource for cutting- edge educational programs, critical industry reports, business-enhancing services, and a myriad of opportunities

350

Bucknell Hydraulic Flume | Open Energy Information  

Open Energy Info (EERE)

Hydraulic Flume Hydraulic Flume Jump to: navigation, search Basic Specifications Facility Name Bucknell Hydraulic Flume Overseeing Organization Bucknell University Hydrodynamic Testing Facility Type Flume Length(m) 9.8 Beam(m) 1.2 Depth(m) 0.6 Water Type Freshwater Cost(per day) Depends on personnel requirements Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 2.7 Wavemaking Capabilities Wavemaking Capabilities None Channel/Tunnel/Flume Channel/Tunnel/Flume Yes Velocity(m/s) 2.7 Recirculating Yes Wind Capabilities Wind Capabilities None Control and Data Acquisition Description Various sensors available on a test-by-test basis Available Sensors Flow, Velocity Data Generation Capability Real-Time No Integrated Display/Graphics Microsoft Windows based systems

351

Advanced Hybrid Propulsion and Energy Management System for High Efficiency, Off Highway, 240 Ton Class, Diesel Electric Haul Trucks  

SciTech Connect (OSTI)

The objective of this project is to reduce the fuel consumption of off-highway vehicles, specifically large tonnage mine haul trucks. A hybrid energy storage and management system will be added to a conventional diesel-electric truck that will allow capture of braking energy normally dissipated in grid resistors as heat. The captured energy will be used during acceleration and motoring, reducing the diesel engine load, thus conserving fuel. The project will work towards a system validation of the hybrid system by first selecting an energy storage subsystem and energy management subsystem. Laboratory testing at a subscale level will evaluate these selections and then a full-scale laboratory test will be performed. After the subsystems have been proven at the full-scale lab, equipment will be mounted on a mine haul truck and integrated with the vehicle systems. The integrated hybrid components will be exercised to show functionality, capability, and fuel economy impacts in a mine setting.

Richter, Tim; Slezak, Lee; Johnson, Chris; Young, Henry; Funcannon, Dan

2008-12-31T23:59:59.000Z

352

Artificial Neural Networks and quadratic Response Surfaces for the functional failure analysis of a thermal-hydraulic passive system  

E-Print Network [OSTI]

] have been widely used in reliability analysis and risk assessment [16]. Recently, advanced samplingArtificial Neural Networks and quadratic Response Surfaces for the functional failure analysis decay heat removal system of a Gas-cooled Fast Reactor (GFR). Keywords: epistemic uncertainties, passive

Paris-Sud XI, Université de

353

MW-class hybrid power system based on planar solid oxide stack technology  

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

Scale-Up of Planar SOFC Stack Scale-Up of Planar SOFC Stack Technology for MW-Level Combined Cycle System Final Report TIAX LLC Acorn Park Cambridge, Massachusetts 02140-2390 Reference: D0136 Submitted to NETL October 3, 2003 1 NETL-Hybrid Scale-UP/D0136/SS/V1 1 Executive Summary 2 Background, Objectives & Approach 3 SOFC Cell Geometry and Modeling 4 SOFC Power Scale-up 5 System Design and Costs 6 Conclusions & Recommendations A Appendix 2 NETL-Hybrid Scale-UP/D0136/SS/V1 Executive Summary SECA Strategy NETL wanted to understand if and how SECA-style anode-supported SOFC stacks could be scaled-up for use in MW-level combined cycle plants. * SECA strategy relies on the use of modular, mass produced, SOFC stacks in the 3 - 10 kW capacity range for a wide range of applications. * Technical feasibility small-scale applications has been evaluated by SECA:

354

Reactor Thermal-Hydraulics  

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

Thermal-Hydraulics Thermal-Hydraulics Dr. Tanju Sofu, Argonne National Laboratory In a power reactor, the energy produced in fission reaction manifests itself as heat to be removed by a coolant and utilized in a thermodynamic energy conversion cycle to produce electricity. A simplified schematic of a typical nuclear power plant is shown in the diagram below. Primary coolant loop Steam Reactor Heat exchanger Primary pump Secondary pump Condenser Turbine Water Although this process is essentially the same as in any other steam plant configuration, the power density in a nuclear reactor core is typically four orders of magnitude higher than a fossil fueled plant and therefore it poses significant heat transfer challenges. Maximum power that can be obtained from a nuclear reactor is often limited by the

355

Evaluation of 2010 Urea-SCR Technology for Hybrid Vehicles using PSAT System Simulations  

Broader source: Energy.gov [DOE]

Results of simulations of LDD hybrid vehicle under hybrid drive cycle conditions in PSAT show the potential impact of urea-SCR NOx controls on HEVs and PHEVs powered by lean-burn engines.

356

Evaluation of 2004 Toyota Prius Hybrid Electic Drive System Interim Report - Revised  

SciTech Connect (OSTI)

The 2004 Toyota Prius is a hybrid automobile equipped with a gasoline engine and a battery-powered electric motor. Both of these motive power sources are capable of providing mechanical drive power for the vehicle. The engine can deliver a peak power output of 57 kilowatts (kW) at 5000 revolutions per minute (rpm) while the motor can deliver a peak power output of 50 kW at 1300 rpm. Together, this engine-motor combination has a specified peak power output of 82 kW at a vehicle speed of 85 kilometers per hour (km/h). In operation, the 2004 Prius exhibits superior fuel economy compared to conventionally powered automobiles. Laboratory tests were conducted to evaluate the electrical and mechanical performance of the 2004 Toyota Prius and its hybrid electric drive system. As a hybrid vehicle, the 2004 Prius uses both a gasoline-powered internal combustion engine and a battery-powered electric motor as motive power sources. Innovative algorithms for combining these two power sources results in improved fuel efficiency and reduced emissions compared to traditional automobiles. Initial objectives of the laboratory tests were to measure motor and generator back-electromotive force (emf) voltages and determine gearbox-related power losses over a specified range of shaft speeds and lubricating oil temperatures. Follow-on work will involve additional performance testing of the motor, generator, and inverter. Information contained in this interim report summarizes the test results obtained to date, describes preliminary conclusions and findings, and identifies additional areas for further study.

Ayers, C.W.; Hsu, J.S.; Marlino, L.D.; Miller, C.W.; Ott, G.W., Jr.; Oland, C.B.; Burress, T.A.

2007-07-31T23:59:59.000Z

357

Model-Free Learning-Based Online Management of Hybrid Electrical Energy Storage Systems in Electric Vehicles  

E-Print Network [OSTI]

Model-Free Learning-Based Online Management of Hybrid Electrical Energy Storage Systems in Electric@elpl.snu.ac.kr Abstract--To improve the cycle efficiency and peak output power density of energy storage systems in electric vehicles (EVs), supercapacitors have been proposed as auxiliary energy storage elements

Pedram, Massoud

358

Concentrating Solar Power Hybrid System Study: Cooperative Research and Development Final Report, CRADA Number CRD-13-506  

SciTech Connect (OSTI)

The purpose of this PTS is to collaboratively leverage the collective resources at General Electric Global Research (GEGRC) and National Renewable Energy Laboratories (NREL) in the areas of concentrating solar power hybrid systems to advance state-of-the-art concentrating solar and conventional power generation system integration.

Turchi, C.

2014-09-01T23:59:59.000Z

359

Constrained control framework for a stand-alone hybrid (Stirling engine)/supercapacitor power generation system  

Science Journals Connector (OSTI)

Abstract In this paper, a complete control architecture is proposed for the voltage conditioning stage of a hybrid power generation system composed of a Stirling engine coupled with a supercapacitor. Such a solar energy-based generation system aims at providing electricity to off-grid regions. The novelty of the proposed architecture is that it completely handles constraints on all the state variables of the electric stage while providing near to optimal performances in terms of settling time. The derivation of the control law enables a deep understanding of the main issues involved in the success of the closed-loop control. Moreover, the resulting feedback laws are real-time compatible and are given in a complete explicit form.

M. Alamir; M.A. Rahmani; D. Gualino

2014-01-01T23:59:59.000Z

360

Nonlinear State Space Model of a Hydraulic Wind Power Transfer Masoud Vaezi1  

E-Print Network [OSTI]

Nonlinear State Space Model of a Hydraulic Wind Power Transfer Masoud Vaezi1 , Majid Deldar1 1, IUPUI. Gearless hydraulic wind power systems are considered as nonlinear models because of some discrete nonlinear governing equations for the elements in the proposed hydraulic wind power configuration. Nonlinear

Zhou, Yaoqi

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Thermodynamic Modeling and Optimum Design Strategy of a Generic Solid Oxide Fuel Cell-Based Hybrid System  

Science Journals Connector (OSTI)

(5, 17, 18) Here, we consider an indirectly combined system of a SOFC and a generic heat engine cycle, which is different from the coupling of high temperature fuel cells with Carnot heat engines, indirectly coupled solid oxide fuel cell/gas turbine hybrid power plants, or integration of a SOFC with a Stirling engine,(19-23) because it can be used to expound the general performance characteristics of a SOFC-based hybrid system, investigate the key irreversible losses of the hybrid system, and obtain the optimum criteria of the main performance parameters. ... The integration of a Stirling engine instead of the microturbine is a second possibility and the object of an ongoing study. ...

Xiuqin Zhang; Juncheng Guo; Jincan Chen

2012-07-09T23:59:59.000Z

362

A study on DC hybrid three-phase fault current limiting interrupter for a power distribution system  

Science Journals Connector (OSTI)

For the purpose of protecting electric power system, many researches and developments of fault current limiters are being performed. The authors studied a dc hybrid three-phase fault current limiting interrupter (FCLI) composed of a superconducting reactor and an S/N transition element, connected in series each other. The dc hybrid type fault current limiting interrupter can limit a fault current by means of the inductance of high temperature superconducting (HTS) coil together with the normal transition of HTS bulk material (HTSB). In the case of an accident, the normal transition of the bulk material can be accelerated by the magnetic field of the HTS coil. In this paper, the dc hybrid type fault current limiting interrupter for 5.5km long 6.6kV600A power distribution system is analyzed, and performances of fault current limitation and interruption are confirmed. Moreover, a reclosing operation is discussed for this power distribution system.

Hongtian Shao; Tomoyuki Satoh; Mitsugi Yamaguchi; Satoshi Fukui; Jun Ogawa; Takao Satoh; Hiroyuki Ishikawa

2005-01-01T23:59:59.000Z

363

Reachability of Delayed Hybrid Systems Using Level-set Methods Renault SAS, Guyancourt, France.  

E-Print Network [OSTI]

for the power management on board hybrid vehicles that allows the vehicle to reach its maximum range along class of hybrid vehicles, namely, range extender electric vehicles (REEV). This kind of hybridization departures from a full electric vehicle that has an additional module ­ the range extender (RE) ­ as an extra

Boyer, Edmond

364

Hydraulic Institute Mission and Vision:  

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

Institute Mission and Vision: Institute Mission and Vision: Vision: To be a global authority on pumps and pumping systems. Mission: To be a value-adding resource to member companies and pump users worldwide by: * Developing and delivering comprehensive industry standards. * Expanding knowledge by providing education and tools for the effective application, testing, installation, operation and maintenance of pumps and pumping systems. * Serving as a forum for the exchange of industry information. The Hydraulic Institute is a non-profit industry (trade) association established in 1917. HI and its members are dedicated to excellence in the engineering, manufacture, and application of pumping equipment. The Institute plays a leading role in the development of pump standards in North America and worldwide. HI

365

Mesoscale hybrid calibration artifact  

DOE Patents [OSTI]

A mesoscale calibration artifact, also called a hybrid artifact, suitable for hybrid dimensional measurement and the method for make the artifact. The hybrid artifact has structural characteristics that make it suitable for dimensional measurement in both vision-based systems and touch-probe-based systems. The hybrid artifact employs the intersection of bulk-micromachined planes to fabricate edges that are sharp to the nanometer level and intersecting planes with crystal-lattice-defined angles.

Tran, Hy D. (Albuquerque, NM); Claudet, Andre A. (Albuquerque, NM); Oliver, Andrew D. (Waltham, MA)

2010-09-07T23:59:59.000Z

366

A GSI-Based Coupled EnSRFEn3DVar Hybrid Data Assimilation System for the Operational Rapid Refresh Model: Tests at a Reduced Resolution  

Science Journals Connector (OSTI)

A coupled ensemble square root filterthree-dimensional ensemble-variational hybrid (EnSRFEn3DVar) data assimilation (DA) system is developed for the operational Rapid Refresh (RAP) forecasting system. The En3DVar hybrid system employs the ...

Yujie Pan; Kefeng Zhu; Ming Xue; Xuguang Wang; Ming Hu; Stanley G. Benjamin; Stephen S. Weygandt; Jeffrey S. Whitaker

2014-10-01T23:59:59.000Z

367

Hybrid intelligent control scheme for air heating system using fuzzy logic and genetic algorithm  

SciTech Connect (OSTI)

Fuzzy logic provides a means for converting a linguistic control strategy, based on expert knowledge, into an automatic control strategy. Its performance depends on membership function and rule sets. In the traditional Fuzzy Logic Control (FLC) approach, the optimal membership is formed by trial-and-error method. In this paper, Genetic Algorithm (GA) is applied to generate the optimal membership function of FLC. The membership function thus obtained is utilized in the design of the Hybrid Intelligent Control (HIC) scheme. The investigation is carried out for an Air Heat System (AHS), an important component of drying process. The knowledge of the optimum PID controller designed, is used to develop the traditional FLC scheme. The computational difficulties in finding optimal membership function of traditional FLC is alleviated using GA In the design of HIC scheme. The qualitative performance indices are evaluated for the three control strategies, namely, PID, FLC and HIC. The comparison reveals that the HIC scheme designed based on the hybridization of FLC with GA performs better. Moreover, GA is found to be an effective tool for designing the FLC, eliminating the human interface required to generate the membership functions.

Thyagarajan, T.; Shanmugam, J.; Ponnavaikko, M.; Panda, R.C.

2000-01-01T23:59:59.000Z

368

Nanoengineering core/shell structured brucite@polyphosphate@amine hybrid system for enhanced flame retardant properties  

Science Journals Connector (OSTI)

Abstract A novel organic-inorganic hybrid flame retardant consisting of a brucite core and a dodecylamine polyphosphate shell was synthesized by a facile nanoengineering route. The flammability characterization and synergistic flame retardant mechanism of the core/shell flame retardant (CFR) in ethylene-vinyl acetate (EVA) blends had been compared with EVA/physical mixture (PM, with the given proportion of brucite and dodecylamine polyphosphate as well as CFR) and EVA/brucite blends. With the same loading amount (40wt%) of fillers in EVA, the peak heat release rate and smoke production rate of EVA/CFR blends were significantly reduced to 49% and 48% of that of EVA/PM blends, respectively. Meanwhile, the limiting oxygen index (LOI) was increased up to 32 (14.3% higher than that of EVA/PM blends) and the UL-94 test could achieve the V-0 rating. These remarkable properties were obtained just by nanoengineeing the core/shell structured brucite@polyphosphate@amine hybrid system, facilitating the formation of intact and compact residue with fence structure in process of polymer composite burning.

Xuesong Wang; Hongchang Pang; Wendan Chen; Yuan Lin; Guiling Ning

2013-01-01T23:59:59.000Z

369

Assessment of the CUPID code applicability to the thermal-hydraulic analysis of a CANDU moderator system  

Science Journals Connector (OSTI)

Abstract The CUPID code has been developed for a transient analysis of two-phase flows in nuclear reactor components. The primary objective of this study is to assess the applicability of the CUPID code to single- and two-phase flow analyses in the Calandria vessel of a CANDU nuclear reactor. At first, the CUPID code is validated against the Stern experiments, which were carried out to investigate the flow in a Calandria vessel. To represent the complicated internal structure of the Calandria vessel, a porous media approach is adopted for the tube bundle region of the Calandria vessel, and an open media approach is used for the outer region. Then, the two regions are modeled using a three-dimensional grid system with polyhedral meshes and bent-structured meshes, respectively. The calculation results of single-phase flow experiments showed good agreement with the experimental data. Thereafter, a hypothetical two-phase flow transient is simulated to assess the CUPID code applicability to two-phase flows analyses.

Sang Ki Park; Jae Jun Jeong; Jae Ryong Lee; Han Young Yoon; Hyoung Tae Kim

2014-01-01T23:59:59.000Z

370

Polygeneration system based on low temperature solid oxide fuel cell/micro gas turbine hybrid system.  

E-Print Network [OSTI]

?? Polygeneration systems attract attention recently because of their high efficiency and low emission compare to the conventional power generation technology. Three different polygeneration systems (more)

Samavati, Mahrokh

2012-01-01T23:59:59.000Z

371

Training Hybrid Neuro-Fuzzy System to Infer Permeability in Wells on Maracaibo Lake, Venezuela  

E-Print Network [OSTI]

The high accuracy on inferrring of rocks properties, such as permeability ($k$), is a very useful study in the analysis of wells. This has led to development and use of empirical equations like Tixier, Timur, among others. In order to improve the inference of permeability we used a hybrid Neuro-Fuzzy System (NFS). The NFS allowed us to infer permeability of well, from data of porosity ($\\phi$) and water saturation ($Sw$). The work was performed with data from wells VCL-1021 (P21) and VCL-950 (P50), Block III, Maracaibo Lake, Venezuela. We evaluated the NFS equations ($k_{P50,i}(\\phi_i,Sw_i)$) with neighboring well data ($P21$), in order to verify the validity of the equations in the area. We have used ANFIS in MatLab.

Hurtado, Nuri; Torres, Julio

2014-01-01T23:59:59.000Z

372

Supergravity Analysis of Hybrid Inflation Model from D3--D7 System  

SciTech Connect (OSTI)

The slow-roll inflation is a beautiful paradigm, yet the inflaton potential can hardly be sufficiently flat when unknown gravitational effects are taken into account. However, the hybrid inflation models constructed in D = 4 N = 1 supergravity can be consistent with N = 2 supersymmetry, and can be naturally embedded into string theory. This article discusses the gravitational effects carefully in the string model, using D = 4 supergravity description. We adopt the D3--D7 system of Type IIB string theory compactified on K3 x T^2/Z_2 orientifold for definiteness. It turns out that the slow-roll parameter can be sufficiently small despite the non-minimal Kahler potential of the model. The conditions for this to happen are clarified in terms of string vacua. We also find that the geometry obtained by blowing up singularity, which is necessary for the positive vacuum energy, is stabilized by introducing certain 3-form fluxes.

Koyama, Fumikazu; Tachikawa, Yuji; Watari, Taizan

2003-11-20T23:59:59.000Z

373

NETL Releases Hydraulic Fracturing Study  

Broader source: Energy.gov [DOE]

The National Energy Technology Laboratory has released a technical report on the results of a limited field study that monitored a hydraulic fracturing operation in Greene County, PA.

374

Dual-Mode Hybrid/Two-Mode Hybrid Accomplishment  

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

Dual-Mode Hybrid/Two-Mode Hybrid Accomplishment Dual-Mode Hybrid/Two-Mode Hybrid Accomplishment DOE-funded research, in collaboration with Allison Buses and General Motors Corporation has led to the commercialization of a dramatically different hybrid transmission system for heavy-duty and light-duty applications. The Dual-Mode or Two-Mode hybrid system is an infinitely variable speed hybrid transmission that works with the engine and battery system and automatically chooses to operate in a parallel or series hybrid path to maximize efficiency and minimize emissions, fuel consumption and noise. Parallel and Series hybrid configurations are found on most hybrid vehicles today, both with their own pluses and minuses. The Dual- Mode/Two-Mode systems uses the positive characteristics from both systems to maximize fuel

375

Numerical Investigation of Interaction Between Hydraulic Fractures and Natural Fractures  

E-Print Network [OSTI]

Hydraulic fracturing of a naturally-fractured reservoir is a challenge for industry, as fractures can have complex growth patterns when propagating in systems of natural fractures in the reservoir. Fracture propagation near a natural fracture (NF...

Xue, Wenxu

2011-02-22T23:59:59.000Z

376

Thomson scattering diagnostic system design for the Compact Toroidal Hybrid experiment  

SciTech Connect (OSTI)

A new Thomson scattering system using standard commercially available components has been designed for the non-axisymmetric plasmas of the Compact Toroidal Hybrid (CTH). The beam, generated by a frequency doubled Continuum PL DLS 2 J Nd:YAG laser, is passed vertically through an entrance Brewster window and an aperturing baffle system to minimize the stray laser light that could enter the collection optics. The beam line has been designed with an 8 m propagation distance to the mid-plane of the CTH device with the beam diameter kept less than 3 mm inside the plasma volume. The beam exits the vacuum system through another Brewster window and enters a beam dump, again to minimize the stray light in the vacuum chamber. Light collection, spectral processing, and signal detection are accomplished with an f/#? 1 aspheric lens, a commercially available Holospec f/1.8 spectrometer, and an Andor iStar DH740-18U-C3 image intensified camera. Spectral rejection of stray laser light, if needed, can be performed with the use of an optional interference filter at the spectrometer input. The system has been developed for initial single point measurements of plasmas with core electron temperatures of approximately 20300 eV and densities of 5 10{sup 18} to 5 10{sup 19}?m{sup ?3} dependent upon operational scenario.

Traverso, P. J., E-mail: pjt0002@auburn.edu; Maurer, D. A.; Ennis, D. A.; Hartwell, G. J.; Goforth, M. M.; Loch, S. D.; Pearce, A. J.; Cianciosa, M. R. [Physics Department, Auburn University, Auburn, Alabama 36849 (United States)

2014-11-15T23:59:59.000Z

377

Retrofitting of Conditioning Systems for Existing Small Commercial Buildings - Analysis and Design of Liquid Desiccant - Vapor Compression Hybrid  

E-Print Network [OSTI]

RETROFITTING OF CONDITIONINC SYSTEMS FOR EXISTING SMALL COMMERCIAL BUILDINGS - ANALYSIS AND DESIGN OF LIQUID DESICCANT - VAPOR COMPRESSION HYBRID Ozer A. Arnas Professor Department of Mechanical Engineering Louisiana State University Baton... is combined with air heated passively in an attic to regenerate the desiccant. A prototype open-cycle, liquid desiccant dehumidification system has been adapted to the existing mechanical system of the building (Figure 1). Guidelines for retrofitting...

Arnas, O. A.; McQueen, T. M.

1984-01-01T23:59:59.000Z

378

Optimal sizing method for stand-alone hybrid solarwind system with LPSP technology by using genetic algorithm  

Science Journals Connector (OSTI)

System power reliability under varying weather conditions and the corresponding system cost are the two main concerns for designing hybrid solarwind power generation systems. This paper recommends an optimal sizing method to optimize the configurations of a hybrid solarwind system employing battery banks. Based on a genetic algorithm (GA), which has the ability to attain the global optimum with relative computational simplicity, one optimal sizing method was developed to calculate the optimum system configuration that can achieve the customers required loss of power supply probability (LPSP) with a minimum annualized cost of system (ACS). The decision variables included in the optimization process are the PV module number, wind turbine number, battery number, PV module slope angle and wind turbine installation height. The proposed method has been applied to the analysis of a hybrid system which supplies power for a telecommunication relay station, and good optimization performance has been found. Furthermore, the relationships between system power reliability and system configurations were also given.

Hongxing Yang; Wei Zhou; Lin Lu; Zhaohong Fang

2008-01-01T23:59:59.000Z

379

Hybrid Control Network Intrusion Detection Systems for Automated Power Distribution Systems  

E-Print Network [OSTI]

and improve the reliability of the distribution system [3].distribution topology for protection and to improve reliability.

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

2014-01-01T23:59:59.000Z

380

Proceedings of the Twenty-First Water Reactor Safety Information Meeting: Volume 1, Plenary session; Advanced reactor research; advanced control system technology; advanced instrumentation and control hardware; human factors research; probabilistic risk assessment topics; thermal hydraulics; thermal hydraulic research for advanced passive LWRs  

SciTech Connect (OSTI)

This three-volume report contains 90 papers out of the 102 that were presented at the Twenty-First Water Reactor Safety Information Meeting held at the Bethesda Marriott Hotel, Bethesda, Maryland, during the week of October 25--27, 1993. The papers are printed in the order of their presentation in each session and describe progress and results of programs in nuclear safety research conducted in this country and abroad. Foreign participation in the meeting included papers presented by researchers from France, Germany, Japan, Russia, Switzerland, Taiwan, and United Kingdom. The titles of the papers and the names of the authors have been updated and may differ from those that appeared in the final program of the meeting. Individual papers have been cataloged separately. This document, Volume 1 covers the following topics: Advanced Reactor Research; Advanced Instrumentation and Control Hardware; Advanced Control System Technology; Human Factors Research; Probabilistic Risk Assessment Topics; Thermal Hydraulics; and Thermal Hydraulic Research for Advanced Passive Light Water Reactors.

Monteleone, S. [Brookhaven National Lab., Upton, NY (United States)] [comp.

1994-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Work-piece alignment for a hybrid multi-axis laser-aided manufacturing system .  

E-Print Network [OSTI]

??"The Laser Aided Manufacturing Process (LAMP) is a multi-axis hybrid manufacturing process comprised of both an additive process, laser deposition, and a subtractive process, CNC (more)

Panackal, Ajay

2006-01-01T23:59:59.000Z

382

Thermoelectric Power Generation System with Loop Thermosyphon in Future High Efficiency Hybrid Vehicles  

Broader source: Energy.gov [DOE]

This project discusses preliminary experimental results to find how thermoelectrics can be applied ot future hybrid vehicles and the optimum design of such equipment using heat pipes

383

Reversible information-to-energy conversions in a quantum hybrid system  

Science Journals Connector (OSTI)

We investigate the properties of a quantum hybrid opto-mechanical transducer in the context of information thermodynamics, and show that it provides a valuable platform to monitor...

Auffeves, Alexia; Elouard, Cyril; Richard, Maxime

384

A Novel Integrated Magnetic Structure Based DC/DC Converter for Hybrid Battery/Ultracapacitor Energy Storage Systems  

SciTech Connect (OSTI)

This manuscript focuses on a novel actively controlled hybrid magnetic battery/ultracapacitor based energy storage system (ESS) for vehicular propulsion systems. A stand-alone battery system might not be sufficient to satisfy peak power demand and transient load variations in hybrid and plug-in hybrid electric vehicles (HEV, PHEV). Active battery/ultracapacitor hybrid ESS provides a better solution in terms of efficient power management and control flexibility. Moreover, the voltage of the battery pack can be selected to be different than that of the ultracapacitor, which will result in flexibility of design as well as cost and size reduction of the battery pack. In addition, the ultracapacitor bank can supply or recapture a large burst of power and it can be used with high C-rates. Hence, the battery is not subjected to supply peak and sharp power variations, and the stress on the battery will be reduced and the battery lifetime would be increased. Utilizing ultracapacitor results in effective capturing of the braking energy, especially in sudden braking conditions.

Onar, Omer C [ORNL

2012-01-01T23:59:59.000Z

385

MICRO-SEISMICITY, FAULT STRUCTURE AND HYDRAULIC COMPARTMENTALIZATION WITHIN  

Open Energy Info (EERE)

MICRO-SEISMICITY, FAULT STRUCTURE AND HYDRAULIC COMPARTMENTALIZATION WITHIN MICRO-SEISMICITY, FAULT STRUCTURE AND HYDRAULIC COMPARTMENTALIZATION WITHIN THE COSO GETHERMAL FIELD, CALIFORNIA Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: MICRO-SEISMICITY, FAULT STRUCTURE AND HYDRAULIC COMPARTMENTALIZATION WITHIN THE COSO GETHERMAL FIELD, CALIFORNIA Details Activities (1) Areas (1) Regions (0) Abstract: High precision earthquake locations and subsurface velocity structure provide potential insights into fracture system geometry, fluid conduits and fluid compartmentalization critical to geothermal reservoir management. We analyze 16 years of seismicity to improve hypocentral locations and simultaneously invert for the seismic velocity structure within the Coso Geothermal Field (CGF). The CGF has been continuously

386

KJRR-FAI Hydraulic Flow Testing Input Package  

SciTech Connect (OSTI)

The INL, in cooperation with the KAERI via Cooperative Research And Development Agreement (CRADA), undertook an effort in the latter half of calendar year 2013 to produce a conceptual design for the KJRR-FAI campaign. The outcomes of this effort are documented in further detail elsewhere [5]. The KJRR-FAI was designed to be cooled by the ATRs Primary Coolant System (PCS) with no provision for in-pile measurement or control of the hydraulic conditions in the irradiation assembly. The irradiation assembly was designed to achieve the target hydraulic conditions via engineered hydraulic losses in a throttling orifice at the outlet of the irradiation vehicle.

N.E. Woolstenhulme; R.B. Nielson; D.B. Chapman

2013-12-01T23:59:59.000Z

387

Testing of a 50-kW wind-diesel hybrid system at the National Wind Technology Center  

SciTech Connect (OSTI)

To further the development of commercial hybrid power systems, the National Renewable Energy Laboratory (NREL), in collaboration with the New World Village Power Corporation (NWVP), tested a NWVP 50-kW wind-diesel hybrid system connected to a 15/50 Atlantic Orient Corporation (AOC) wind turbine. Testing was conducted from October 1995 through March 1996 at the National Wind Technology Center (NWTC). A main objective of the testing was to better understand the application of wind turbines to weak grids typical of small villages. Performance results contained in this paper include component characterization, such as power conversion losses for the rotary converter systems and battery round trip efficiencies. In addition, systems operation over this period is discussed with special attention given to dynamic issues. Finally, future plans for continued testing and research are discussed.

Corbus, D.A.; Green, J.; Allderdice, A.; Rand, K.; Bianchi, J. [National Renewable Energy Lab., Golden, CO (United States); Linton, E. [New World Village Power, Waitsfield, VT (United States)

1996-07-01T23:59:59.000Z

388

Process management using component thermal-hydraulic function classes  

DOE Patents [OSTI]

A process management expert system where following malfunctioning of a component, such as a pump, for determining system realignment procedures such as for by-passing the malfunctioning component with on-line speeds to maintain operation of the process at full or partial capacity or to provide safe shut down of the system while isolating the malfunctioning component. The expert system uses thermal-hydraulic function classes at the component level for analyzing unanticipated as well as anticipated component malfunctions to provide recommended sequences of operator actions. Each component is classified according to its thermal-hydraulic function, and the generic and component-specific characteristics for that function. Using the diagnosis of the malfunctioning component and its thermal hydraulic class, the expert system analysis is carried out using generic thermal-hydraulic first principles. One aspect of the invention employs a qualitative physics-based forward search directed primarily downstream from the malfunctioning component in combination with a subsequent backward search directed primarily upstream from the serviced component. Generic classes of components are defined in the knowledge base according to the three thermal-hydraulic functions of mass, momentum and energy transfer and are used to determine possible realignment of component configurations in response to thermal-hydraulic function imbalance caused by the malfunctioning component. Each realignment to a new configuration produces the accompanying sequence of recommended operator actions. All possible new configurations are examined and a prioritized list of acceptable solutions is produced. 5 figs.

Morman, J.A.; Wei, T.Y.C.; Reifman, J.

1999-07-27T23:59:59.000Z

389

Process management using component thermal-hydraulic function classes  

DOE Patents [OSTI]

A process management expert system where following malfunctioning of a component, such as a pump, for determining system realignment procedures such as for by-passing the malfunctioning component with on-line speeds to maintain operation of the process at full or partial capacity or to provide safe shut down of the system while isolating the malfunctioning component. The expert system uses thermal-hydraulic function classes at the component level for analyzing unanticipated as well as anticipated component malfunctions to provide recommended sequences of operator actions. Each component is classified according to its thermal-hydraulic function, and the generic and component-specific characteristics for that function. Using the diagnosis of the malfunctioning component and its thermal hydraulic class, the expert system analysis is carried out using generic thermal-hydraulic first principles. One aspect of the invention employs a qualitative physics-based forward search directed primarily downstream from the malfunctioning component in combination with a subsequent backward search directed primarily upstream from the serviced component. Generic classes of components are defined in the knowledge base according to the three thermal-hydraulic functions of mass, momentum and energy transfer and are used to determine possible realignment of component configurations in response to thermal-hydraulic function imbalance caused by the malfunctioning component. Each realignment to a new configuration produces the accompanying sequence of recommended operator actions. All possible new configurations are examined and a prioritized list of acceptable solutions is produced.

Morman, James A. (Woodridge, IL); Wei, Thomas Y. C. (Downers Grove, IL); Reifman, Jaques (Western Springs, IL)

1999-01-01T23:59:59.000Z

390

Influence of the Type of Oxygen Carriers on the Performance of a Hybrid Solar Chemical Looping Combustion System  

Science Journals Connector (OSTI)

A thermal analysis of a hybrid solar chemical looping combustion (Hy-Sol-CLC) system is presented to identify the energetic performance of various combinations of fuel and oxygen carriers. ... (6, 13) However, the potential advantages and disadvantages of these alternative oxygen carriers and inert materials for use in Hy-Sol-CLC systems are yet to be evaluated. ... combustion has the advantage that no energy is lost for the sepn. of CO2. ...

Mehdi Jafarian; Maziar Arjomandi; Graham J. Nathan

2014-04-09T23:59:59.000Z

391

Hybrid Quantum System of a Nanofiber Mode Coupled to Two Chains of Optically Trapped Atoms  

E-Print Network [OSTI]

A tapered optical nanofiber simultaneously used to trap and optically interface of cold atoms through evanescent fields constitutes a new and well controllable hybrid quantum system. The atoms are trapped in two parallel 1D optical lattices generated by suitable far blue and red detuned evanescent field modes very close to opposite sides of the nanofiber surface. Collective electronic excitations (excitons) of each of the optical lattices are resonantly coupled to the second lattice forming symmetric and antisymmetric common excitons. In contrast to the inverse cube dependence of the individual atomic dipole-dipole interaction, we analytically find an exponentially decaying coupling strength with distance between the lattices. The resulting symmetric (bright) excitons strongly interact with the resonant nanofiber photons to form fiber polaritons, which can be observed through linear optical spectra. For large enough wave vectors the polariton decay rate to free space is strongly reduced, which should render this system ideal for the realization of long range quantum communication between atomic ensembles.

Hashem Zoubi; Helmut Ritsch

2010-06-10T23:59:59.000Z

392

Strategic selection of suitable projects for hybrid solar-wind power generation systems  

Science Journals Connector (OSTI)

Because of the pressing need for maintaining a healthy environment with reasonable costs, China is moving toward the trend for generating electricity from renewable resources. Both solar energy and wind power have received a tremendous attention from private associations, political groups, and electric power companies to generate power on a large scale. A drawback is their unpredictable nature and dependence on weather. Fortunately, the problems can be partially tackled by using the strengths of one source to overcome the weakness of the other. Especially, a large fraction of the solar resource is available at times of peak electrical load. However, the complexity of using two different resources together makes the hybrid solar-wind generation systems more difficult to analyze. Accordingly, this paper first briefly introduces the solar-wind generation system and next develops its critical success criteria. Then, a fuzzy analytic hierarchy process associated with benefits, opportunities, costs and risks, is proposed to help select a suitable solar-wind power generation project.

Hsing Hung Chen; He-Yau Kang; Amy H.I. Lee

2010-01-01T23:59:59.000Z

393

A hybrid passive/active system for control of the noise radiated by a small generator  

Science Journals Connector (OSTI)

The aim of this work was the design and implementation of a hybrid passive/active system to control the noise radiated by a small generator. The fundamental frequency of the periodic radiated noise depends on the electrical load plugged into the generator. Passive control is afforded by a rectangular enclosure with dimensions 1000710530?mm3. The wall panels of the enclosure (steel 1.5 mm thick) are lined with a 30?mm layer of sound absorbing material. Special attention is paid to technical aspects such as air refreshing and temperature inside the enclosure. The measured insertion loss is higher than 20 dB above 500 Hz. Low?frequency noise escapes the enclosure via intake and exhaust openings. Active control is applied to the exhaust noise. The reference signal is supplied by an accelerometer over the air filter case of the generator. A high?temperature loudspeaker is used as control source. The error signal is picked up by a cheap electric microphone. Since noise along the exhaust is too loud the microphone sensitivity had to be reduced by taping its diaphragm. A commercial system is used to implement active noise control. [Work supported by CICYT Project AMB97?1175?C03?01.

Maria Cuesta; Pedro Cobo

1999-01-01T23:59:59.000Z

394

HYBRID LIMIT CYCLES AND HYBRID POINCARE-BENDIXSON  

E-Print Network [OSTI]

HYBRID LIMIT CYCLES AND HYBRID POINCAR´E-BENDIXSON Slobodan N. Simi´c Department of Electrical regular hybrid systems with no branching (Simi´c et al., 2000a). The first one provides a condition for asymptotic stability of hybrid closed orbits in terms of contraction-expansion rates of resets and flows

Johansson, Karl Henrik

395

A novel off-grid hybrid power system comprised of solar photovoltaic, wind, and hydro energy sources  

Science Journals Connector (OSTI)

Abstract Several factors must be considered before adopting a full-phase power generation system based on renewable energy sources. Long-term necessary data (for one year if possible) should be collected before making any decisions concerning implementation of such a systems. To accurately assess the potential of available resources, we measured solar irradiation, wind speed, and ambient temperature at two high-altitude locations in Nepal: the Lama Hotel in Rasuwa District and Thingan in Makawanpur District. Here, we propose two practical, economical hybridization methods for small off-grid systems consisting entirely of renewable energy sourcesspecifically solar photovoltaic (PV), wind, and micro-hydro sources. One of the methods was tested experimentally, and the results can be applied to help achieve Millennium Development Goal 7: Ensuring environmental sustainability. Hydro, wind, and solar photovoltaic energy are the top renewable energy sources in terms of globally installed capacity. However, no reports have been published about off-grid hybrid systems comprised of all three sources, making this implementation the first of its kind anywhere. This research may be applied as a practical guide for implementing similar systems in various locations. Of the four off-grid PV systems installed by the authors for village electrification in Nepal, one was further hybridized with wind and hydro power sources. This paper presents a novel approach for connecting renewable energy sources to a utility mini-grid.

Binayak Bhandari; Kyung-Tae Lee; Caroline Sunyong Lee; Chul-Ki Song; Ramesh K. Maskey; Sung-Hoon Ahn

2014-01-01T23:59:59.000Z

396

A current and future state of art development of hybrid energy system using wind and PV-solar: A review  

Science Journals Connector (OSTI)

The wind and solar energy are omnipresent, freely available, and environmental friendly. The wind energy systems may not be technically viable at all sites because of low wind speeds and being more unpredictable than solar energy. The combined utilization of these renewable energy sources are therefore becoming increasingly attractive and are being widely used as alternative of oil-produced energy. Economic aspects of these renewable energy technologies are sufficiently promising to include them for rising power generation capability in developing countries. A renewable hybrid energy system consists of two or more energy sources, a power conditioning equipment, a controller and an optional energy storage system. These hybrid energy systems are becoming popular in remote area power generation applications due to advancements in renewable energy technologies and substantial rise in prices of petroleum products. Research and development efforts in solar, wind, and other renewable energy technologies are required to continue for, improving their performance, establishing techniques for accurately predicting their output and reliably integrating them with other conventional generating sources. The aim of this paper is to review the current state of the design, operation and control requirement of the stand-alone PV solarwind hybrid energy systems with conventional backup source i.e. diesel or grid. This Paper also highlights the future developments, which have the potential to increase the economic attractiveness of such systems and their acceptance by the user.

Pragya Nema; R.K. Nema; Saroj Rangnekar

2009-01-01T23:59:59.000Z

397

NAPTH: Neutronics analysis code system for the fusionfission hybrid reactor with pressure tube type blanket  

Science Journals Connector (OSTI)

The fusionfission hybrid reactor is considered as a potential path to the early application of fusion energy. A new concept with pressure tube type blanket has recently been proposed for a feasible hybrid reactor. In this paper, a code system for the neutronics analysis of the pressure tube type hybrid reactor is developed based on the two-step calculation scheme: the few-group homogeneous constant calculation and the full blanket calculation. The few-group homogeneous constants are calculated using the lattice code DRAGON4. The blanket transport calculation is performed by the multigroup Monte Carlo code. A link procedure for fitting the cross sections is developed between these two steps. An additional procedure is developed to calculate the burnup, power distribution, energy multiplication factor, tritium breeding ratio and neutron multiplication factor. From some numerical results, it is found that the code system NAPTH is reliable and exhibits good calculation efficiency. It can be used for the conceptual design of the pressure tube type hybrid reactor with precise geometry.

Tiejun Zu; Hongchun Wu; Youqi Zheng; Liangzhi Cao; Chao Yang

2013-01-01T23:59:59.000Z

398

NREL: Vehicles and Fuels Research - Hybrid Electric Fleet Vehicle...  

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

Hybrid Electric Fleet Vehicle Testing How Hybrid Electric Vehicles Work Hybrid electric vehicles combine a primary power source, an energy storage system, and an electric motor to...

399

MagLab - MagLab Dictionary: Hybrid Magnet (Transcript)  

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

Hybrid Magnet As explained by Scott Hannahs, DC Facilities & Instrumentation director. Hybrid magnet The lab's world-record 45 tesla hybrid magnet. The premier magnet system at the...

400

Rural area application of HOMER software for feasibility analysis of hybrid energy system with an improved approach  

Science Journals Connector (OSTI)

For a power supply in a remote rural area where a grid supply is infeasible, a hybrid energy system consisting of a renewable energy mix, with a backup generation, could be a viable alternative. Feasibility analysis and determination of optimal combination of such a system is a complex task owing to the uncertain nature of renewable energies, load demand uncertainty, non-linear characteristic of components and interdependency of process components. HOMER software performs this complicated task in an easy and accurate way by economically analysing various possible alternatives and sorting them out for optimality. However the limitation of results for optimality determination based on single criteria has been improved in the present paper using analytic hierarchy process (AHP). A rural study area has been identified for validation of proposed methodology. The approach provides the most optimal hybrid energy system for the selected study area accommodating many aspects of analysis allowing suitable weightage to each of them.

Abha Rajoriya; Eugene Fernandez

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Optimal Design of a Stand-Alone Hybrid PV/Fuel Cell Power System for the City of Brest in France  

E-Print Network [OSTI]

= Photovoltaic; FC = Fuel Cell; COE = cost of energy; CC = Capital Costs; NPC = Net Present Cost; TNPC = Total. Elbaset4 Abstract ­ This paper deals with the optimal design of a stand-alone hybrid photovoltaic and fuel reserved. Keywords: Hybrid power system, renewable energy, photovoltaic, fuel cell, generation unit sizing

Paris-Sud XI, Université de

402

Development and application of a hybrid transport methodology for active interrogation systems  

SciTech Connect (OSTI)

A hybrid Monte Carlo and deterministic methodology has been developed for application to active interrogation systems. The methodology consists of four steps: i) neutron flux distribution due to neutron source transport and subcritical multiplication; ii) generation of gamma source distribution from (n, 7) interactions; iii) determination of gamma current at a detector window; iv) detection of gammas by the detector. This paper discusses the theory and results of the first three steps for the case of a cargo container with a sphere of HEU in third-density water cargo. To complete the first step, a response-function formulation has been developed to calculate the subcritical multiplication and neutron flux distribution. Response coefficients are pre-calculated using the MCNP5 Monte Carlo code. The second step uses the calculated neutron flux distribution and Bugle-96 (n, 7) cross sections to find the resulting gamma source distribution. In the third step the gamma source distribution is coupled with a pre-calculated adjoint function to determine the gamma current at a detector window. The AIMS (Active Interrogation for Monitoring Special-Nuclear-Materials) software has been written to output the gamma current for a source-detector assembly scanning across a cargo container using the pre-calculated values and taking significantly less time than a reference MCNP5 calculation. (authors)

Royston, K.; Walters, W.; Haghighat, A. [Nuclear Engineering Program, Department of Mechanical Engineering, Virginia Tech., 900 N Glebe Rd., Arlington, VA 22203 (United States); Yi, C.; Sjoden, G. [Nuclear and Radiological Engineering, Georgia Tech, 801 Ferst Drive, Atlanta, GA 30332 (United States)

2013-07-01T23:59:59.000Z

403

Comparison between pressurized design and ambient pressure design of hybrid solid oxide fuel cellgas turbine systems  

Science Journals Connector (OSTI)

Design performances of the hybrid solid oxide fuel cell (SOFC)gas turbine (GT) system have been investigated. A pressurized system and an indirectly heated ambient pressure system were analyzed and their performances were compared. In the baseline layout, the basic performance characteristics of the two system configurations were analyzed, with the cell operation temperature and the pressure ratio as the main design parameters. The pressurized system exhibits a better efficiency owing to not only the higher cell voltage but also more effective utilization of gas turbine, i.e., a larger GT power contribution due to a higher turbine inlet temperature. Independent setting of the turbine inlet temperature was simulated by using the additional fuel supply as well as the air bypass. Increasing the pressure ratio of the gas turbine hardly improves the system efficiency, but the efficiency becomes less sensitive to the turbine inlet temperature. In the ambient pressure system, the available design parameter range is much reduced due to the limit on the recuperator temperature. In particular, design of the ambient pressure hybrid system with a gas turbine of a high pressure ratio does not seem quite feasible because the system efficiency that can be achieved at the possible design conditions is even lower than the efficiency of the SOFC only system.

S.K. Park; T.S. Kim

2006-01-01T23:59:59.000Z

404

Heavy vehicle hybrid propulsion systems R and D program plan, FY 2000-2005  

SciTech Connect (OSTI)

This report contains the program plan and background information for the Heavy Vehicle Hybrid Propulsion R and D Program sponsored by the Department of Energy's Office of Heavy Vehicle Technologies. The program is a collaboration between industry and government established for the development of advanced hybrid-electric propulsion technology for urban cycle trucks and buses. It targets specific applications to enhance potential market success. Potential end-users are also involved.

None

2000-07-01T23:59:59.000Z

405

Recover Power with Hydraulic Motors  

E-Print Network [OSTI]

Anywhere liquid pressure is reduced across a throttling device, there is a potential application for a hydraulic power recovery motor (HPRM). Cost of power makes HPRM's attractive with recoveries as small as 25 hp on a continuous basis. When...

Brennan, J. R.

1982-01-01T23:59:59.000Z

406

Environmental Impacts of Hydraulic Fracturing  

Science Journals Connector (OSTI)

...their environmental impacts, which has been published...the hydrogeological impacts of oil and gas development...Chafin, 1994), not fracking. Watson and Bachu...Frontiers Ecology Environment. 2011. 9( 9): 503...R. Environmental Impacts of Hydraulic Fracturing...

Richard Jackson

407

Hydraulic Fracturing Data Collection Tools Improve Environmental Reporting,  

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

Hydraulic Fracturing Data Collection Tools Improve Environmental Hydraulic Fracturing Data Collection Tools Improve Environmental Reporting, Monitoring, Protection Hydraulic Fracturing Data Collection Tools Improve Environmental Reporting, Monitoring, Protection April 18, 2013 - 12:03pm Addthis Washington, DC -Two data collection tools specifically developed for hydraulic fracturing are available to help regulatory agencies monitor drilling and completion operations and enhance environmental protection. Developed with support from the U.S. Department of Energy's Office of Fossil Energy (FE), the Risk Based Data Management System (RBDMS) and FracFocus chemical disclosure registry provide a way for industry professionals, regulatory agencies and the general public to more easily access information on oil and natural gas activities. These reporting and

408

Hydraulic Fracturing Data Collection Tools Improve Environmental Reporting,  

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

Hydraulic Fracturing Data Collection Tools Improve Environmental Hydraulic Fracturing Data Collection Tools Improve Environmental Reporting, Monitoring, Protection Hydraulic Fracturing Data Collection Tools Improve Environmental Reporting, Monitoring, Protection April 18, 2013 - 12:03pm Addthis Washington, DC -Two data collection tools specifically developed for hydraulic fracturing are available to help regulatory agencies monitor drilling and completion operations and enhance environmental protection. Developed with support from the U.S. Department of Energy's Office of Fossil Energy (FE), the Risk Based Data Management System (RBDMS) and FracFocus chemical disclosure registry provide a way for industry professionals, regulatory agencies and the general public to more easily access information on oil and natural gas activities. These reporting and

409

Numerical simulation of hydraulic fracturing  

E-Print Network [OSTI]

NUMERICAL SIMULATION OF HYDRAULIC FRACTURING A Thesis by JOSEPH BARNES WARNER Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1987 Maj or Subj ect...: Petroleum Engineering NUMERICAL SIMULATION OF HYDRAULIC FRACTURING A Thesis by JOSEPH BARNES WARNER Approved as to style and content by: S. A. Holditch (Chairman of Committee) D. D. Van Fleet (member) J. E. Russell (m be ) W. D. Von onten ( ead...

Warner, Joseph Barnes

2012-06-07T23:59:59.000Z

410

A SELF-POWERED, SELF-SUSTAINING SYSTEM-ON-CHIP (SOC) SOLUTION POWERED FROM HYBRID MICRO-FUEL CELLS  

E-Print Network [OSTI]

batteries (e.g., Li-ion, NiMH, NiCd, etc.). Therefore, integrating the battery with a power efficient system-on-ship (SOC) solution with fully integrated micro-fuel cell/thin-film lithium-ion battery hybrids. A power scheme is proposed whereby micro-fuel cells charge an in-package thin-film lithium-ion battery, which

Rincon-Mora, Gabriel A.

411

Modeling and optimization of hybrid windsolar-powered reverse osmosis water desalination system in Saudi Arabia  

Science Journals Connector (OSTI)

Abstract A hybrid wind/solar powered reverse osmosis desalination system has been modeled and simulated. The results of the simulation have been used to optimize the system for the minimum cost per cubic meter of the desalinated water. The performance of the hybrid wind/solar powered RO system has been analyzed under Dhahran, Saudi Arabia, weather data for a typical year. The performance has been evaluated under a constant RO load of 1kW for 12h/day and 24h/day. The simulation results revealed that the optimum system that powers a 1-kW RO system for 12h/day that yields a minimum levelized cost of energy comprises 2 wind turbines, 40 \\{PVs\\} modules and 6 batteries and the levelized cost of energy of such system is found to be 0.624$/kWh. On the other hand, for a load of 1-kW for 24h/day, the optimum system consists of 6 wind turbines, 66 \\{PVs\\} modules and 16 batteries with a minimum levelized cost of energy 0.672$/kWh. Depending on the salinity of the raw water, the energy consumption for desalination ranges between 8 and 20kWh/m3. This means that the cost of using the proposed optimum hybrid wind/solar system for water desalination will range between $3.693/m3 and $3. 812/m3 which is less than the range reported in the literature.

Esmail M.A. Mokheimer; Ahmet Z. Sahin; Abdullah Al-Sharafi; Ahmad I. Ali

2013-01-01T23:59:59.000Z

412

BBO-based small autonomous hybrid power system optimization incorporating wind speed and solar radiation forecasting  

Science Journals Connector (OSTI)

Abstract Rising carbon emission or carbon footprint imposes grave concern over the earth?s climatic condition, as it results in increasing average global temperature. Renewable energy sources seem to be the favorable solution in this regard. It can reduce the overall energy consumption rate globally. However, the renewable sources are intermittent in nature with very high initial installation price. Off-grid Small Autonomous Hybrid Power Systems (SAHPS) are good alternative for generating electricity locally in remote areas, where the transmission and distribution of electrical energy generated from conventional sources are otherwise complex, difficult and costly. In optimizing SAHPS, weather data over past several years are generally the main input, which include wind speed and solar radiation. The weather resources used in this optimization process have unsystematic variations based on the atmospheric and seasonal phenomenon and it also varies from year to year. While using past data in the analysis of SAHPS performance, it was assumed that the same pattern will be followed in the next year, which in reality is very unlikely to happen. In this paper, we use BBO optimization algorithm for SAHPS optimal component sizing by minimizing the cost of energy. We have also analysed the effect of using forecast weather data instead of past data on the SAHPS performance. ANNs, which are trained with back-propagation training algorithm, are used for wind speed and solar radiation forecasting. A case study was used for demonstrating the performance of BBO optimization algorithm along with forecasting effects. The simulation results clearly showed the advantages of utilizing wind speed and solar radiation forecasting in a SAHPS optimization problem.

R.A. Gupta; Rajesh Kumar; Ajay Kumar Bansal

2015-01-01T23:59:59.000Z

413

Testing of a 50-kW Wind-Diesel Hybrid System at the National Wind Technology Center  

SciTech Connect (OSTI)

In remote off-grid villages and communities, a reliable power source is important in improving the local quality of life. Villages often use a diesel generator for their power, but fuel can be expensive and maintenance burdensome. Including a wind turbine in a diesel system can reduce fuel consumption and lower maintenance, thereby reducing energy costs. However, integrating the various components of a wind-diesel system, including wind turbine, power conversion system, and battery storage (if applicable), is a challenging task. To further the development of commercial hybrid power systems, the National Renewable Energy Laboratory (NREL), in collaboration with the New World Village Power Corporation (NWVP), tested a NWVP 50-kW wind-diesel hybrid system connected to a 15/50 Atlantic Orient Corporation (AOC) wind turbine. Testing was conducted from October 1995 through March 1996 at the National Wind Technology Center (NWTC). A main objective of the testing was to better understand the application of wind turbines to weak grids typical of small villages. Performance results contained in this report include component characterization, such as power conversion losses for the rotary converter system and battery round trip efficiencies. In addition, system operation over the test period is discussed with special attention given to dynamic issues. Finally, future plans for continued testing and research are discussed.

Corbus, D. A.; Green, H. J.; Allderdice, A.; Rand, K.; Bianchi, J.; Linton, E.

1996-07-01T23:59:59.000Z

414

Application of Product Design Concepts and Hybrid System Dynamics to Demonstrate Zeno Behavior and Zeno Periodic Orbits in a Physical Double Pendulum Setup  

E-Print Network [OSTI]

This thesis aims to explain how the concepts of functional modeling are implemented in the development and validation of real-world hybrid dynamic systems. I also discuss how control theory is integrated with the design process in order...

Kothapalli, Bhargav

2012-07-16T23:59:59.000Z

415

Influence of steam injection through exhaust heat recovery on the design performance of solid oxide fuel cell gas turbine hybrid systems  

Science Journals Connector (OSTI)

This study analyzed the influence of steam injection on the performance of hybrid systems combining a solid oxide fuel cell and a gas turbine. Two different ... the effects of injecting steam, generated by recovering

Sung Ku Park; Tong Seop Kim; Jeong L. Sohn

2009-02-01T23:59:59.000Z

416

A hybrid method combining JFPSO and probabilistic three-phase load flow for improving unbalanced voltages in distribution systems with photovoltaic generators  

Science Journals Connector (OSTI)

This paper presents a new hybrid method that combines jumping frog and particle swarm optimization and probabilistic three-phase load flow to improve unbalanced voltages in distribution systems with photovoltaic

F. J. Ruiz-Rodriguez; F. Jurado; M. Gomez-Gonzalez

2014-09-01T23:59:59.000Z

417

A hybrid system for fault detection and sensor fusion based on fuzzy clustering and artificial immune systems  

E-Print Network [OSTI]

In this study, an efficient new hybrid approach for multiple sensors data fusion and fault detection is presented, addressing the problem with possible multiple faults, which is based on conventional fuzzy soft clustering and artificial immune...

Jaradat, Mohammad Abdel Kareem Rasheed

2007-04-25T23:59:59.000Z

418

Dynamic vibration analysis of a swash-plate type water hydraulic motor  

Science Journals Connector (OSTI)

This paper presents the study of the dynamic analysis of a swash-plate water hydraulic motor in a modern water hydraulic system. A swash-plate mechanism is modeled as a system with three masses and 14 degrees of freedom (DOF). In order to evaluate the applicability of the dynamic model, the numerical simulation analysis of the dynamic response of the model due to pressure pulsation is presented and compared with experimental results. A series of the dynamic vibration characteristics of the water hydraulic piston motor are studied by the numerical simulation. It is effective for the model to simulate the vibration signal of the casing in the hydraulic motor. The waveform and frequency of the simulated signal is similar to the experimental signal. The simulated signals in other directions show that the vibration signals in all the directions mainly consist of the hydraulic pump and hydraulic motor rotational frequencies.

H.X. Chen; Patrick S.K. Chua; G.H. Lim

2006-01-01T23:59:59.000Z

419

Modification of ordinary-mode reflectometry system to detect lower-hybrid waves in Alcator C-Mod  

SciTech Connect (OSTI)

Backscattering experiments to detect lower-hybrid (LH) waves have been performed in Alcator C-Mod, using the two modified channels (60 GHz and 75 GHz) of an ordinary-mode reflectometry system with newly developed spectral recorders that can continuously monitor spectral power at a target frequency. The change in the baseline of the spectral recorder during the LH wave injection is highly correlated to the strength of the X-mode non-thermal electron cyclotron emission. In high density plasmas where an anomalous drop in the lower hybrid current drive efficiency is observed, the observed backscattered signals are expected to be generated near the last closed flux surface, demonstrating the presence of LH waves within the plasma. This experimental technique can be useful in identifying spatially localized LH electric fields in the periphery of high-density plasmas.

Baek, S. G.; Shiraiwa, S.; Parker, R. R.; Dominguez, A.; Marmar, E. S. [Plasma Science and Fusion Center, MIT, Cambridge, Massachusetts 02139 (United States); Kramer, G. J. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)

2012-10-15T23:59:59.000Z

420

LANL debuts hybrid garbage truck  

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

Hybrid garbage truck LANL debuts hybrid garbage truck The truck employs a system that stores energy from braking and uses that pressure to help the truck accelerate after each...

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Hybrid Abstractions that Preserve Timed Languages  

E-Print Network [OSTI]

Hybrid Abstractions that Preserve Timed Languages Paulo Tabuada1 and George J. Pappas2 1 Instituto@ee.upenn.edu Abstract. In this paper we consider the problem of extracting an ab- straction from a hybrid control system that determine when trajectories of the original hybrid system can be generated by the abstracted hybrid system

Pappas, George J.

422

INTERPRETATION OF A HYDRAULIC FRACTURING EXPERIMENT, MONTICELLO, SOUTH CAROLINA  

E-Print Network [OSTI]

Letters INTERPRETATION OF A HYDRAULIC FRACTURING EXPERIMENT,12091 INTERPRETATION OF A HYDRAULIC FRACTURING EXPERIMENT,transient data from a hydraulic fracturing experiment have

Narasimhan, T.N.

2014-01-01T23:59:59.000Z

423

Multi-Disciplinary Decision Making and Optimization for Hybrid Electric Propulsion Systems  

SciTech Connect (OSTI)

In this paper, we investigate the trade-offs among the subsystems of a hybrid electric vehicle (HEV), e.g., the engine, motor, and the battery, and discuss the related im- plications for fuel consumption and battery capacity and lifetime. Addressing this problem can provide insights on how to prioritize these objectives based on consumers needs and preferences.

Shoultout, Mohamed L. [University of Texas at Austin; Malikopoulos, Andreas [ORNL; Pannala, Sreekanth [ORNL; Chen, Dongmei [University of Texas at Austin

2014-01-01T23:59:59.000Z

424

Optimal sizing of a hybrid energy system for a semi-arid climate using an evolutionary algorithm  

Science Journals Connector (OSTI)

The use of a genetic algorithm (GA) for optimal sizing of an off-grid hybrid renewable energy system (HRES) is reported. As a pre-feasibility analysis and to determine the appropriate HRES type to be studied, wind energy potential and solar irradiation are first examined for the considered region (Tehran, Iran). These are inputs of the algorithm, and are assessed throughout a year utilising statistical and temperature-based approaches. After identifying the appropriate system type, three scenarios with different system constraints are defined. Applying the GA for each scenario identifies the minimum initial investment costs and net present costs as well as the optimum size of the system components. The results suggest that one scenario (3) has the lowest net present cost and includes 36% renewable energy generation, making it superior to the other optimised system scenarios.

Majid Vafaeipour; Omid Rahbari; Marc A. Rosen; Farivar Fazelpour; Seyed Mohammadreza Heibati

2014-01-01T23:59:59.000Z

425

Hybrid Mesons  

E-Print Network [OSTI]

The SU(3)_flavor constituent quark model has been quite successful to explain the properties as well as the observed spectrum of mesons with pseudoscalar and vector quantum numbers. Many radial and orbital excitations of quark-antiquark systems predicted by the model, however, have not yet been observed experimentally or assigned unambiguously. In addition, a much richer spectrum of mesons is expected from QCD, in which quarks interact which each other through the exchange of colored self-interacting gluons. Owing to this particular structure of QCD, configurations are allowed in which an excited gluonic field contributes to the quantum numbers J^{PC} of the meson. States with a valence color-octet qqbar' pair neutralized in color by an excited gluon field are termed hybrids. The observation of such states, however, is difficult because they will mix with ordinary qqbar' states with the same quantum numbers, merely augmenting the observed spectrum for a given J^{PC}. Since the gluonic field may carry quantum numbers other than 0^{++}, however, this can give rise to states with "exotic" quantum numbers J^{PC}=0^{--}, 0^{+-}, 1^{-+}, 2^{+-},... The lowest-lying hybrid multiplet is expected to contain a state with exotic quantum numbers J^{PC}=1^{-+}. The identification of such a state is considered a "smoking gun" for the observation of non-qqbar mesons. The search for hybrid states has been a central goal of hadron spectroscopy in the last 20 years. Ongoing and upcoming high-statistics experiments are expected to shed new light on the existence of such states in nature. In this paper, theoretical predictions for masses and decay modes as well as recent experimental evidence for hybrid meson states and future experimental directions are discussed.

Bernhard Ketzer

2012-08-25T23:59:59.000Z

426

Dewatering of coalbed methane wells with hydraulic gas pump  

SciTech Connect (OSTI)

The coalbed methane industry has become an important source of natural gas production. Proper dewatering of coalbed methane (CBM) wells is the key to efficient gas production from these reservoirs. This paper presents the Hydraulic Gas Pump as a new alternative dewatering system for CBM wells. The Hydraulic Gas Pump (HGP) concept offers several operational advantages for CBM wells. Gas interference does not affect its operation. It resists solids damage by eliminating the lift mechanism and reducing the number of moving parts. The HGP has a flexible production rate and is suitable for all production phases of CBM wells. It can also be designed as a wireline retrievable system. We conclude that the Hydraulic Gas Pump is a suitable dewatering system for coalbed methane wells.

Amani, M.; Juvkam-Wold, H.C. [Texas A& M Univ., College Station, TX (United States)

1995-12-31T23:59:59.000Z

427

Hydraulic Fracturing | Open Energy Information  

Open Energy Info (EERE)

Hydraulic Fracturing Hydraulic Fracturing Jump to: navigation, search More info on OpenEI Oil and Gas Gateway Federal Environmental Statues Federal Oil and Gas Statutes Oil and Gas Companies United States Oil and Gas Boards International Oil and Gas Boards Other Information Fracking Regulations by State Wells by State Fracking Chemicals Groundwater Protection Related Reports A Perspective on Health and Natural Gas Operations: A Report for Denton City Council Just the Fracking Facts The Politics of 'Fracking': Regulating Natural Gas Drilling Practices in Colorado and Texas Addressing the Environmental Risks from Shale Gas Development Water Management Technologies Used by Marcellus Shale Gas Producers Methane contamination of drinking wateraccompanying gas-well drilling and hydraulic fracturing

428

Method for directional hydraulic fracturing  

DOE Patents [OSTI]

A method for directional hydraulic fracturing using borehole seals to confine pressurized fluid in planar permeable regions, comprising: placing a sealant in the hole of a structure selected from geologic or cemented formations to fill the space between a permeable planar component and the geologic or cemented formation in the vicinity of the permeable planar component; making a hydraulic connection between the permeable planar component and a pump; permitting the sealant to cure and thereby provide both mechanical and hydraulic confinement to the permeable planar component; and pumping a fluid from the pump into the permeable planar component to internally pressurize the permeable planar component to initiate a fracture in the formation, the fracture being disposed in the same orientation as the permeable planar component.

Swanson, David E. (West St. Paul, MN); Daly, Daniel W. (Crystal, MN)

1994-01-01T23:59:59.000Z

429

A load predictive energy management system for supercapacitor-battery hybrid energy storage system in solar application using the Support Vector Machine  

Science Journals Connector (OSTI)

Abstract This paper presents the use of a Support Vector Machine load predictive energy management system to control the energy flow between a solar energy source, a supercapacitor-battery hybrid energy storage combination and the load. The supercapacitor-battery hybrid energy storage system is deployed in a solar energy system to improve the reliability of delivered power. The combination of batteries and supercapacitors makes use of complementary characteristic that allow the overlapping of a batterys high energy density with a supercapacitors high power density. This hybrid system produces a straightforward benefit over either individual system, by taking advantage of each characteristic. When the supercapacitor caters for the instantaneous peak power which prolongs the battery lifespan, it also minimizes the system cost and ensures a greener system by reducing the number of batteries. The resulting performance is highly dependent on the energy controls implemented in the system to exploit the strengths of the energy storage devices and minimize its weaknesses. It is crucial to use energy from the supercapacitor and therefore minimize jeopardizing the power system reliability especially when there is a sudden peak power demand. This study has been divided into two stages. The first stage is to obtain the optimum SVM load prediction model, and the second stage carries out the performance comparison of the proposed SVM-load predictive energy management system with conventional sequential programming control (if-else condition). An optimized load prediction classification model is investigated and implemented. This C-Support Vector Classification yields classification accuracy of 100% using 17 support vectors in 0.004866s of training time. The Polynomial kernel is the optimum kernel in our experiments where the C and g values are 2 and 0.25 respectively. However, for the load profile regression model which was implemented in the K-step ahead of load prediction, the radial basis function (RBF) kernel was chosen due to the highest squared correlation coefficient and the lowest mean squared error. Results obtained shows that the proposed SVM load predictive energy management system accurately identifies and predicts the load demand. This has been justified by the supercapacitor charging and leading the peak current demand by 200ms for different load profiles with different optimized regression models. This methodology optimizes the cost of the system by reducing the amount of power electronics within the hybrid energy storage system, and also prolongs the batteries lifespan as previously mentioned.

Yen Yee Chia; Lam Hong Lee; Niusha Shafiabady; Dino Isa

2015-01-01T23:59:59.000Z

430

Techno-economic analysis of hybrid photovoltaic/diesel/battery off-grid system in northern Nigeria  

Science Journals Connector (OSTI)

The rate of dependence on stand-alone diesel generator for individual electricity generation among households in Nigeria is geometrically increasing and has thus led to significant increase of the environment pollution. This is due to the inability of the utility company to meet the energy demand of its yearning consumers due to ageing and limitations in power infrastructures. This has led to about 40% of the country's population been cut off from the national grid. In view of these hazardous effects posed from the usage of these individual diesel-powered generations this paper reports on the assessment of techno-economic viability of a hybrid photovoltaic diesel/battery off-grid system as an alternative solution to these threats. For that purpose a remote area located far in the northern part of Nigeria was taken as the case study in which an international institution with peak demand of 90?kW was considered. The HOMER optimization software is used to evaluate both the technical and economic viability of the proposed energy system by taking into account the variations of both the solar radiation and diesel prices as experienced in most part of Nigeria. The study reveals the potential capability of the hybrid photovoltaic/diesel energy system with battery backup as a good alternative energy source for individual household replacement for diesel-powered generator. In addition the proposed system is of high energy potential as well as low carbon emission at affordable cost of electricity.

Hafeez Olasunkanmi Tijani; Chee Wei Tan

2014-01-01T23:59:59.000Z

431

CRITICALITY CURVES FOR PLUTONIUM HYDRAULIC FLUID MIXTURES  

SciTech Connect (OSTI)

This Calculation Note performs and documents MCNP criticality calculations for plutonium (100% {sup 239}Pu) hydraulic fluid mixtures. Spherical geometry was used for these generalized criticality safety calculations and three geometries of neutron reflection are: {sm_bullet}bare, {sm_bullet}1 inch of hydraulic fluid, or {sm_bullet}12 inches of hydraulic fluid. This document shows the critical volume and critical mass for various concentrations of plutonium in hydraulic fluid. Between 1 and 2 gallons of hydraulic fluid were discovered in the bottom of HA-23S. This HA-23S hydraulic fluid was reported by engineering to be Fyrquel 220. The hydraulic fluid in GLovebox HA-23S is Fyrquel 220 which contains phosphorus. Critical spherical geometry in air is calculated with 0 in., 1 in., or 12 inches hydraulic fluid reflection.

WITTEKIND WD

2007-10-03T23:59:59.000Z

432

Increasing the solid angle of the Enge Split-Pole Magnetic Spectrograph and continuing the development of the hybrid detector system  

E-Print Network [OSTI]

INCREASING THE SOLID ANGLE OF THK ENGR SPLIT-POLE MAGNETIC SPECTROGRAPH AND CONTINUING THK DEVELOPMENT OF THE HYBRID DETECTOR SYSTEM A Thesis by PHILIP WILLIAM BOWMAN Submitted to the Office of Graduate Studies of Texas A&M University... in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1991 Major Subject: Physics INCREASING THE SOLID ANGLE OF THE ENGR SPLIT-POLE NAGNETIC SPECTROGRAPH AND CONTINUING THE DEVELOPMENT OF THE HYBRID DETECTOR SYSTEN A Thesis...

Bowman, Philip William

2012-06-07T23:59:59.000Z

433

Thermodynamic and optical analysis for a CPV/T hybrid system with beam splitter and fully tracked linear Fresnel reflector concentrator utilizing sloped panels  

Science Journals Connector (OSTI)

Abstract Spectral splitting technology that separates solar spectrum into several parts and enables different energy conversions such as photovoltaic (PV) conversion and photo-thermal conversion aims to utilize the full spectrum solar energy efficiently. A novel concentrating PV/Thermal (CPV/T) hybrid system with beam splitter and fully tracked linear Fresnel reflector concentrator utilizing sloped panels was proposed in this study. The relations between the structural parameters and the optical performances of the system were investigated. The concentrated radiation distribution on the PV device surface was simulated by taking into account the main optical errors and shows a good uniformity. Based on the experimental data of the components, thermodynamic analysis on the CPV/T hybrid system was carried out and the results reveal that the overall energy conversion efficiencies of the proposed CPV/T hybrid system is higher than that of the CPV system under the same conditions.

Yang Liu; Peng Hu; Qian Zhang; Zeshao Chen

2014-01-01T23:59:59.000Z

434

GAL4 Two-Hybrid Vectors Handbook  

E-Print Network [OSTI]

MATCHMAKER GAL4 Two-Hybrid Vectors Handbook (PT3062-1) Information Supplement for: Catalog # Product K1605-1 MATCHMAKER Two-Hybrid System K1604-1 MATCHMAKER Two-Hybrid System 2 (many) MATCHMAKER Libraries FOR RESEARCH USE ONLY (PR6X890) #12;MATCHMAKER GAL4 Two-Hybrid Vectors Handbook CLONTECH

Erickson, F. Les

435

Hydraulic Fracturing in Michigan Integrated Assessment  

E-Print Network [OSTI]

Hydraulic Fracturing in Michigan Integrated Assessment #12;Agenda · Welcome and introduction and timeline · Panel presentation and discussion · Facilitated Q & A · Closing remarks #12;Hydraulic Fracturing · Leverages resources IA BENEFITS Benefits of Integrated Assessment #12;Key Points: · Hydraulic Fracturing (HF

Kamat, Vineet R.

436

Hydraulic Fracture: multiscale processes and moving  

E-Print Network [OSTI]

Hydraulic Fracture: multiscale processes and moving interfaces Anthony Peirce Department Mitchell (UBC) · Ed Siebrits (SLB, Houston) #12;2 Outline · What is a hydraulic fracture? · Scaling Fluid Proppant #12;6 An actual hydraulic fracture #12;7 HF experiment (Jeffrey et al CSIRO) #12;8 1D

Peirce, Anthony

437

Regulation of Hydraulic Fracturing in California  

E-Print Network [OSTI]

APRIL 2013 Regulation of Hydraulic Fracturing in California: A WAsteWAteR And WAteR QuAlity Pe | Regulation of Hydraulic Fracturing in California Wheeler Institute for Water Law & Policy Center for Law #12;Regulation of Hydraulic Fracturing in California | 3Berkeley law | wheeler InstItute for water law

Kammen, Daniel M.

438

Hydraulic Fracture: multiscale processes and moving  

E-Print Network [OSTI]

Hydraulic Fracture: multiscale processes and moving interfaces Anthony Peirce Department Siebrits (SLB, Houston) #12;2 Outline · What is a hydraulic fracture? · Mathematical models of hydraulic fracture · Scaling and special solutions for 1-2D models · Numerical modeling for 2-3D problems

Peirce, Anthony

439

Lower-Energy Energy Storage System (LEESS) Evaluation in a Full-Hybrid Electric Vehicle (HEV) (Presentation)  

SciTech Connect (OSTI)

The cost of hybrid electric vehicles (HEVs) (e.g., Toyota Prius or Ford Fusion Hybrid) remains several thousand dollars higher than the cost of comparable conventional vehicles, which has limited HEV market penetration. The battery energy storage device is typically the component with the greatest contribution toward this cost increment, so significant cost reductions/performance improvements to the energy storage system (ESS) can improve the vehicle-level cost-benefit relationship, which would in turn lead to larger HEV market penetration and greater aggregate fuel savings. The National Renewable Energy Laboratory (NREL) collaborated with a United States Advanced Battery Consortium (USABC) Workgroup to analyze trade-offs between vehicle fuel economy and reducing the minimum energy requirement for power-assist HEVs. NREL's analysis showed that significant fuel savings could still be delivered from an ESS with much lower energy storage than previous targets, which prompted the United States Advanced Battery Consortium (USABC) to issue a new set of lower-energy ESS (LEESS) targets that could be satisfied by a variety of technologies, including high-power batteries or ultracapacitors. NREL has developed an HEV test platform for in-vehicle performance and fuel economy validation testing of the hybrid system using such LEESS devices. This presentation describes development of the vehicle test platform and in-vehicle evaluation results using a lithium-ion capacitor ESS-an asymmetric electrochemical energy storage device possessing one electrode with battery-type characteristics (lithiated graphite) and one with ultracapacitor-type characteristics (carbon). Further efforts include testing other ultracapacitor technologies in the HEV test platform.

Cosgrove, J.; Gonder, J.; Pesaran, A.

2013-11-01T23:59:59.000Z

440

Impact of plug-in hybrid electric vehicles on power systems with demand response and wind power.  

SciTech Connect (OSTI)

This paper uses a new unit commitment model which can simulate the interactions among plug-in hybrid electric vehicles (PHEVs), wind power, and demand response (DR). Four PHEV charging scenarios are simulated for the Illinois power system: (1) unconstrained charging, (2) 3-hour delayed constrained charging, (3) smart charging, and (4) smart charging with DR. The PHEV charging is assumed to be optimally controlled by the system operator in the latter two scenarios, along with load shifting and shaving enabled by DR programs. The simulation results show that optimally dispatching the PHEV charging load can significantly reduce the total operating cost of the system. With DR programs in place, the operating cost can be further reduced.

Wang, J.; Liu, C.; Ton, D.; Zhou, Y.; Kim, J.; Vyas, A. (Decision and Information Sciences); ( ES); (ED); (Kyungwon Univ.)

2011-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

A Multi-Level Grid Interactive Bi-directional AC/DC-DC/AC Converter and a Hybrid Battery/Ultra-capacitor Energy Storage System with Integrated Magnetics for Plug-in Hybrid Electric Vehicles  

SciTech Connect (OSTI)

This study presents a bi-directional multi-level power electronic interface for the grid interactions of plug-in hybrid electric vehicles (PHEVs) as well as a novel bi-directional power electronic converter for the combined operation of battery/ultracapacitor hybrid energy storage systems (ESS). The grid interface converter enables beneficial vehicle-to-grid (V2G) interactions in a high power quality and grid friendly manner; i.e, the grid interface converter ensures that all power delivered to/from grid has unity power factor and almost zero current harmonics. The power electronic converter that provides the combined operation of battery/ultra-capacitor system reduces the size and cost of the conventional ESS hybridization topologies while reducing the stress on the battery, prolonging the battery lifetime, and increasing the overall vehicle performance and efficiency. The combination of hybrid ESS is provided through an integrated magnetic structure that reduces the size and cost of the inductors of the ESS converters. Simulation and experimental results are included as prove of the concept presenting the different operation modes of the proposed converters.

Onar, Omer C [ORNL] [ORNL

2011-01-01T23:59:59.000Z

442

A Hybrid Denotational Semantics for Hybrid Olivier Bouissou and Matthieu Martel  

E-Print Network [OSTI]

A Hybrid Denotational Semantics for Hybrid Systems Olivier Bouissou and Matthieu Martel 1 CEA LIST. In this article, we present a model and a denotational se- mantics for hybrid systems. Our model is designed analysis, or to analyze the whole hybrid system made of the continuous environment and the discrete program

Paris-Sud XI, Université de

443

Thermodynamic analysis of energy conversion and transfer in hybrid system consisting of wind turbine and advanced adiabatic compressed air energy storage  

Science Journals Connector (OSTI)

Abstract A simulation model consisting of wind speed, wind turbine and AA-CAES (advanced adiabatic compressed air energy storage) system is developed in this paper, and thermodynamic analysis on energy conversion and transfer in hybrid system is carried out. The impacts of stable wind speed and unstable wind speed on the hybrid system are analyzed and compared from the viewpoint of energy conversion and system efficiency. Besides, energy conversion relationship between wind turbine and AA-CAES system is investigated on the basis of process analysis. The results show that there are several different forms of energy in hybrid system, which have distinct conversion relationship. As to wind turbine, power coefficient determines wind energy utilization efficiency, and in AA-CAES system, it is compressor efficiency that mainly affects energy conversion efficiencies of other components. The strength and fluctuation of wind speed have a direct impact on energy conversion efficiencies of components of hybrid system, and within proper wind speed scope, the maximum of system efficiency could be expected.

Yuan Zhang; Ke Yang; Xuemei Li; Jianzhong Xu

2014-01-01T23:59:59.000Z

444

Sequential Injection Analysis System for the Sandwich Hybridization-Based Detection of Nucleic Acids  

Science Journals Connector (OSTI)

A dynamic range of 1?1000 pmol was obtained for a synthetic DNA sequence that was homologous to a segment in the B. anthracis atxA mRNA. ... A bead-immobilized biotinylated DNA capture probe and a fluorescein-labeled DNA reporter probe hybridize specifically to an unlabeled synthetic DNA target, which was complementary to both probes for method development. ... The sequences of the synthetic DNA probes and primers for NASBA were purchased from Operon (Alamada, CA) and are listed in Table 1. ...

Katie A. Edwards; Antje J. Baeumner

2006-02-01T23:59:59.000Z

445

Washington, D.C. and Indiana: Allison Hybrid Technology Achieves...  

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

system, which features regenerative braking enabled by two motorgenerator electric machines within the hybrid system. In addition to WMATA's buses, Allison's hybrid bus...

446

Compact, electro-hydraulic, variable valve actuation system providing variable lift, timing and duration to enable high efficiency engine combustion control  

Broader source: Energy.gov [DOE]

Discusses development of advanced variable valve actuation system to enable high efficiency combustion highlighting advances to improving system packaging while reducing cost

447

MHK Technologies/Tidal Hydraulic Generators THG | Open Energy Information  

Open Energy Info (EERE)

Generators THG Generators THG < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Tidal Hydraulic Generators THG.jpg Technology Profile Primary Organization Tidal Hydraulic Generators Ltd Project(s) where this technology is utilized *MHK Projects/Ramsey Sound Technology Resource Click here Current/Tidal Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 1-3: Discovery / Concept Definition / Early Stage Development & Design & Engineering Technology Description The concept of generating energy in this way is made unique by our novel design feature. The generator, devised in 1998, is a hydraulic accumulator system, involving relatively small revolving blades which gather power to a central collector, where electricity is generated. The generator, which is situated under water, is 80 metres square, stands at 15 metres high, and is designed to run for a minimum of ten years without service.

448

Microseismic Tracer Particles for Hydraulic Fracturing  

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

Microseismic Tracer Particles for Hydraulic Fracturing Microseismic Tracer Particles for Hydraulic Fracturing Microseismic Tracer Particles for Hydraulic Fracturing Scientists at Los Alamos National Laboratory have developed a method by which microseismic events can be discriminated/detected that correspond to only the portion of the hydraulic fracture that contains the proppant material and can be expected to be conductive to the flow of oil and gas. July 3, 2013 Microseismic Tracer Particles for Hydraulic Fracturing Figure 1: A graph of ionic conductivity as a function of temperature for the anti-perovskite Li3OCl. Available for thumbnail of Feynman Center (505) 665-9090 Email Microseismic Tracer Particles for Hydraulic Fracturing Applications: Oil and gas production Geophysical exploration Benefits: Tracks the disposition of material in a hydraulic fracturing

449

Prediction of thermal behaviors of an air-cooled lithium-ion battery system for hybrid electric vehicles  

Science Journals Connector (OSTI)

Abstract Thermal management has been one of the major issues in developing a lithium-ion (Li-ion) hybrid electric vehicle (HEV) battery system since the Li-ion battery is vulnerable to excessive heat load under abnormal or severe operational conditions. In this work, in order to design a suitable thermal management system, a simple modeling methodology describing thermal behavior of an air-cooled Li-ion battery system was proposed from vehicle components designer's point of view. A proposed mathematical model was constructed based on the battery's electrical and mechanical properties. Also, validation test results for the Li-ion battery system were presented. A pulse current duty and an adjusted US06 current cycle for a two-mode HEV system were used to validate the accuracy of the model prediction. Results showed that the present model can give good estimations for simulating convective heat transfer cooling during battery operation. The developed thermal model is useful in structuring the flow system and determining the appropriate cooling capacity for a specified design prerequisite of the battery system.

Yong Seok Choi; Dal Mo Kang

2014-01-01T23:59:59.000Z

450

A feasibility study of a stand-alone hybrid solarwindbattery system for a remote island  

Science Journals Connector (OSTI)

Abstract This paper presents a detailed feasibility study and techno-economic evaluation of a standalone hybrid solarwind system with battery energy storage for a remote island. The solar radiation and wind data on this island in 2009 was recorded for this study. The HOMER software was employed to do the simulations and perform the techno-economic evaluation. Thousands of cases have been carried out to achieve an optimal autonomous system configuration, in terms of system net present cost (NPC) and cost of energy (COE). A detailed analysis, description and expected performance of the proposed system were presented. Moreover, the effects of the PV panel sizing, wind turbine sizing and battery bank capacity on the systems reliability and economic performance were examined. Finally, a sensitivity analysis on its load consumption and renewable energy resource was performed to evaluate the robustness of economic analysis and identify which variable has the greatest impact on the results. The results demonstrate the techno-economic feasibility of implementing the solarwindbattery system to supply power to this island.

Tao Ma; Hongxing Yang; Lin Lu

2014-01-01T23:59:59.000Z

451

Opportunities for Micropower and Fuel Cell/Gas Turbine Hybrid Systems in Industrial Applications- Volume I, January 2000  

Broader source: Energy.gov [DOE]

An assessment of the opportunities for micropower and fuel cell/gas turbine hybrid technologies in the industrial sector.

452

Merging hydraulics with biology  

SciTech Connect (OSTI)

Research staff are now working with developers in Lao PDR and Australia to ensure design criteria is optimised at time of construction. Research is presently underway on a suite of Mekong and Murray-Darling species to identify critical tolerances of shear and pressure. Work in the USA is also being expanded to lamprey and white sturgeon in an effort to increase the understanding beyond salmon species. Researchers and developers are hopeful of constructing the first fish-friendly hydro plants within the next two years. Pending favourable outcomes, the expansion of this technology to other sites and river systems is the ultimate development outcome.

Thorncraft, Garry; Baumgartner, Lee J.; Boys, Craig A.; Brown, Richard S.

2013-01-01T23:59:59.000Z

453

Disturbance Control of the Hydraulic Brake in a Wind Turbine  

E-Print Network [OSTI]

Disturbance Control of the Hydraulic Brake in a Wind Turbine Frank Jepsen, Anders Søborg brake in a wind turbine. Brake torque is determined by friction coefficient and clamp force; the latter brake is one1 of the two independent brake systems in a wind turbine. As a consequence of the gearing

Yang, Zhenyu

454

Hydraulic conductivity of shaly sands  

SciTech Connect (OSTI)

The effects of clays on the hydraulic conductivity of a sandstone are analyzed by considering a simple clay coating structure for the sand grains. In the model, silicate insulating nuclei are uniformly surrounded by charged clay particles. The total charge on the clays is compensated by a counterion density Q{sub v}. Assuming a capillary flow regime inside this granular model a Kozeny-Carman type equation has been derived, expressing its intrinsic permeability k in terms of a porosity-tortuosity factor {phi}{sup (m{minus}0.5)} and of the parameter Q{sub v}. The power-law derived expression shows that k decreases with the amount of clay, not only because a high Q{sub v} implies a narrowing of the pore channels, but also because it modifies the hydraulic tortuosity of the medium. This new equation has been statistically tested with extensive petrophysical laboratory data for different types of shaly sandstones.

Lima, O.A.L. de [PPPG/Federal Univ. of Bahia, Salvador Bahia (Brazil)

1994-12-31T23:59:59.000Z

456

GCFR thermal-hydraulic experiments  

SciTech Connect (OSTI)

The thermal-hydraulic experimental studies performed and planned for the Gas-Cooled Fast Reactor (GCFR) core assemblies are described. The experiments consist of basic studies performed to obtain correlations, and bundle experiments which provide input for code validation and design verification. These studies have been performed and are planned at European laboratories, US national laboratories, Universities in the US, and at General Atomic Company

Schlueter, G.; Baxi, C.B.; Dalle Donne, M.; Gat, U.; Fenech, H.; Hanson, D.; Hudina, M.

1980-01-01T23:59:59.000Z

457

Geophysical Prospecting, 2007, 55, 891899 doi:10.1111/j.1365-2478.2007.00654.x Importance of borehole deviation surveys for monitoring of hydraulic  

E-Print Network [OSTI]

of borehole deviation surveys for monitoring of hydraulic fracturing treatments Petr Bulant1 , Leo Eisner2 accepted April 2007 ABSTRACT During seismic monitoring of hydraulic fracturing treatment, it is very common-system geometry derived from microseismic event locations. For common hydraulic fracturing geometries, a 2

Cerveny, Vlastislav

458

A hybrid systems model to simulate cyber interdependencies between critical infrastructures  

Science Journals Connector (OSTI)

Critical infrastructures (CI) depend on communications and information technology infrastructure (CITI) for many of their key functionalities, which is known as cyber interdependency. In this paper, we presented a cyber interdependency simulation technique that is based on the idea that overall performance of a CI network is determined by the behaviour of its components at multiple time scales. Accordingly, for cyber interdependency simulation, we decomposed CI network into two time scales; regular CI events are captured in large time-steps and data communication network events are captured in smaller time-steps. Two different simulators are used for each of these partitions and results from both simulations are synchronised appropriately. A real life example is presented to demonstrate the accuracy and usefulness of our approach. The hybrid simulation model gives significant flexibility to plug-in domain specific models into the critical infrastructure simulator for accurate and efficient solution.

Hafiz Abdur Rahman; José R. Martí; K.D. Srivastava

2011-01-01T23:59:59.000Z

459

Experiments and thermal modeling on hybrid energy supply system of gas engine heat pumps and organic Rankine cycle  

Science Journals Connector (OSTI)

Abstract This paper presents a hybrid energy supply system, which is composed of two subsystems (gas engine-driven heat pump system (GEHP) and organic Rankine cycle system (ORC)) and three major thermodynamic cycles (the vapor compression refrigeration cycle, the internal combustion gas engine cycle and ORC). In order to convert the low-grade gas engine waste heat into high-grade electricity, the ORC system is built up using R245fa, \\{R152a\\} and R123 as working fluids, and the ORC thermal model is also developed. Meanwhile, experiments of \\{GHEPs\\} in cooling mode are conducted, and several factors which influence the cooling performance are also discussed. The results indicate that the cooling capacity, gas engine energy consumption, gas engine waste heat increase with increasing of gas engine speed and decrease with decreasing of evaporator water inlet temperature. The waste heat recovered from gas engine is more than 55% of gas engine energy consumption. F6urthermore, R123 in ORC system yields the highest thermal and exergy efficiency of 11.84% and 54.24%, respectively. Although, thermal and exergy efficiency of \\{R245fa\\} is 11.42% and 52.25% lower than that of R123, its environmental performance exhibits favorable utilization for ORC using gas engine waste heat as low-grade heat source.

Huanwei Liu; Qiushu Zhou; Haibo Zhao; Peifeng Wang

2015-01-01T23:59:59.000Z

460

Morphology and properties of a hybrid organic-inorganic system: Al nanoparticles embedded into CuPc thin film  

SciTech Connect (OSTI)

The evolution of the morphology and the electronic structure of the hybrid organic-inorganic system composed of aluminum nanoparticles (NPs) distributed in an organic semiconductor matrixcopper phthalocyanine (CuPc)as a function of nominal aluminum content was studied by transmission electron microscopy and by photoemission spectroscopy methods. The aluminum atoms deposited onto the CuPc surface diffuse into the organic matrix and self-assemble to NPs in a well-defined manner with a narrow diameter distribution, which depends on the amount of aluminum that is evaporated onto the CuPc film. We find clear evidence of a charge transfer from Al to CuPc and we have been able to determine the lattice sites where Al ions sit. The finally at high coverage about 64? the formation of metallic aluminum overlayer on CuPc thin film takes place.

Molodtsova, O. V.; Babenkov, S. V. [Deutsches Elektronen-Synchrotron DESY, Notkestrae 85, 22607 Hamburg (Germany); Aristova, I. M. [Institute of Solid State Physics of Russian Academy of Sciences, Chernogolovka 142432 (Russian Federation); Vilkov, O. V. [Helmholtz-Zentrum Berlin (HZB) fr Materialien und Energie, Albert-Einstein-Strae 15, 12489 Berlin (Germany); Aristov, V. Yu., E-mail: aristov@issp.ac.ru [Deutsches Elektronen-Synchrotron DESY, Notkestrae 85, 22607 Hamburg (Germany); Institute of Solid State Physics of Russian Academy of Sciences, Chernogolovka 142432 (Russian Federation); Institut fr Theoretische Physik, Universitt Hamburg, Jungiusstrae 9, D-20355 Hamburg (Germany)

2014-04-28T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

Solar Central Receiver Hybrid Power Systems sodium-cooled receiver concept. Final report. Volume II, Book 2. Conceptual design, Sections 5 and 6  

SciTech Connect (OSTI)

The overall, long-term objective of the Solar Central Receiver Hybrid Power System program is to identify, characterize, and ultimately demonstrate the viability and cost effectiveness of solar/fossil, steam Rankine cycle, hybrid power systems that: (1) consist of a combined solar central receiver energy source and a nonsolar energy source at a single, common site, (2) may operate in the base, intermediate, and peaking capacity modes, (3) produce the rated output independent of variations in solar insolation, (4) provide a significant savings (50% or more) in fuel consumption, and (5) produce power at the minimum possible cost in mills/kWh. It is essential that these hybrid concepts be technically feasible and economically competitive with other systems in the near to mid-term time period (1985-1990) on a commercial scale. The program objective for Phase I is to identify and conceptually characterize solar/fossil steam Rankine cycle, commercial-scale, power plant systems that are economically viable and technically feasible. This volume contains the detailed conceptual design and cost/performance estimates and an assessment of the commercial scale solar central receiver hybrid power system. (WHK)

None

1980-01-01T23:59:59.000Z

462

Definition: Hydraulic Conductivity | Open Energy Information  

Open Energy Info (EERE)

Conductivity Conductivity Jump to: navigation, search Dictionary.png Hydraulic Conductivity Hydraulic conductivity is a physical property which measures the ability of the material to transmit fluid through pore spaces and fractures in the presence of an applied hydraulic gradient. Darcy's Law defines the hydraulic conductivity as the ratio of the average velocity of a fluid through a cross-sectional area (Darcy's velocity) to the applied hydraulic gradient.[1] View on Wikipedia Wikipedia Definition Hydraulic conductivity, symbolically represented as, is a property of vascular plants, soil or rock, that describes the ease with which a fluid (usually water) can move through pore spaces or fractures. It depends on the intrinsic permeability of the material and on the degree of

463

Hybrid Vehicle Links  

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

Hybrid Links Hybrid Links Exit Fueleconomy.gov The links below are to pages that are not part of the fueleconomy.gov Web site. We offer these external links for your convenience in accessing additional information that may be useful or interesting to you. Hybrid Vehicles and Manufacturers Acura ILX Hybrid Audi Q5 Hybrid BMW ActiveHybrid 3 ActiveHybrid 5 ActiveHybrid 7 Buick LaCrosse eAssist* Regal eAssist* Chevrolet Malibu Eco* Impala eAssist* Ford Fusion Hybrid Honda Accord Hybrid Civic Hybrid Honda CR-Z Honda Insight Hyundai Sonata Hybrid Infiniti M Hybrid Q50 Hybrid Q50 S Hybrid QX60 Hybrid Kia Optima Hybrid Lexus CT 200h Lexus ES 300h GS 450h LS 600h L RX 450h Lincoln MKZ Hybrid Mercedes-Benz Mercedes E400 Hybrid Nissan Pathfinder Hybrid Porsche Cayenne S Hybrid Subaru XV Crosstrek Hybrid Toyota Avalon Hybrid

464

Control and Data Acquisition System for Lower Hybrid Current Drive in Alcator C-Mod  

E-Print Network [OSTI]

. The construction of the LHCD system is a collaboration between Princeton Plasma Physics Laboratory (PPPL) and MIT. PPPL is responsible for the front-end of the system (grill, waveguide run); status of that part

Basse, Nils Plesner

465

Renewable Energy Powered Membrane Technology. 1. Development and Characterization of a Photovoltaic Hybrid Membrane System  

E-Print Network [OSTI]

the unavailability of power in many such situations, renewable energy is an obvious solution to power such systems. However, renewable energy is an intermittent power supply and with regards to the performance of intermittently operated desalination systems, only...

Schfer, Andrea; Broeckmann, Andreas; Richards, Bryce

2007-01-01T23:59:59.000Z

466

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

Broader source: Energy.gov [DOE]

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

467

DESIGN OF HYBRID MARINE CONTROL SYSTEMS FOR DYNAMIC POSITIONING IN EXTREME SEAS  

E-Print Network [OSTI]

GENERATION & DISTRIBUTION PROCESS CONTROL STATION PROPULSION WIND SENSORS VRU GYRO BACK-UP SYSTEM SAFETY SYSTEM EMERGENCY SHUTDOWN FIRE & GAS ENERGY MANAGEMENT SYSTEM AZIPOD INFORMATION MANAGEMENT REMOTE · Harsh environmental conditions ­ Strong current: Gulf of Mexico, Northern England, Southern Norway

Nørvåg, Kjetil

468

Hybride Montagesysteme  

Science Journals Connector (OSTI)

Hybride Montagesysteme sind Einrichtungen zur Montage von Baugruppen und/oder Produkten, in denen Automatikstationen mit Handarbeitspltzen kombiniert sind. Sie liegen hinsichtlich Stckzahl, Variantenvielfalt...

Edwin Lotter

2006-01-01T23:59:59.000Z

469

Hybride Montagesysteme  

Science Journals Connector (OSTI)

Hybride Montagesysteme sind Einrichtungen zur Montage von Baugruppen und/oder Produkten, in denen Automatikstationen mit Handarbeitspltzen kombiniert sind. Sie liegen hinsichtlich Stckzahl, Variantenvielfalt...

Edwin Lotter

2012-01-01T23:59:59.000Z

470

Design and implementation of hybrid renewable energy systems on micro-communities: A review on case studies  

Science Journals Connector (OSTI)

Abstract In a world struggling for sustainable access to energy for all, renewable energy systems can be a solution to implement on isolated micro-communities. However, such an implementation is still a challenge. This paper aims to review several types of projects developed in different micro-communities, namely small islands and remote villages, both in cases of real implementation and only evaluation studies. To do that, we analyzed documented projects in micro-communities with less than 100,000 people. We looked into different indicators related to island characterization, energy demand and proposed technical solution, in order to identify the determinant factors for the success of the implementation and how do they differ for islands and remote villages. In islands, the main factors that influence the achievement of higher percentages of renewable source (RES) are the design of the existing energy system, the presence of a reliable energy storage system and the profile of the electricity demand, especially the occurrence of peak demand and seasonal oscillations. In general, the more popular configuration is a diesel/wind/photovoltaic. In remote villages, higher percentages of RES are meet more easily in cases of very low demand, unstructured previous electric supply and the capability of using batteries as storage. The more popular configuration is the photovoltaic/diesel/batteries. Having detailed demand information, estimates from the local renewable resources and the adequacy of the storage system are critical aspects for the system's design and its successful and reliable application. This review also shows that the data reported in many different case studies is often incomplete, which makes it hard to benchmark and evaluate the different projects. Thus, this paper proposes a methodology to report the data regarding the design and implementation of hybrid renewable energy systems, to enable the comparison of future projects and contribute to the discovery of new insights about the implementability of these systems.

Diana Neves; Carlos A. Silva; Stephen Connors

2014-01-01T23:59:59.000Z

471

Monitoring hydraulic fracture growth: Laboratory experiments  

SciTech Connect (OSTI)

The authors carry out small-scale hydraulic fracture experiments to investigate the physics of hydraulic fracturing. The laboratory experiments are combined with time-lapse ultrasonic measurements with active sources using both compressional and shear-wave transducers. For the time-lapse measurements they focus on ultrasonic measurement changes during fracture growth. As a consequence they can detect the hydraulic fracture and characterize its shape and geometry during growth. Hence, this paper deals with fracture characterization using time-lapse acoustic data. Hydraulic fracturing is used in the oil and gas industry to stimulate reservoir production.

Groenenboom, J.; Dam, D.B. van

2000-04-01T23:59:59.000Z

472

Hydraulic fracturing and shale gas extraction.  

E-Print Network [OSTI]

??In the past decade the technique of horizontal drilling and hydraulic fracturing has been improved so much that it has become a cost effective method (more)

Klein, Michael

2012-01-01T23:59:59.000Z

473

Geomechanical review of hydraulic fracturing technology .  

E-Print Network [OSTI]

??Hydraulic fracturing as a method for recovering unconventional shale gas has been around for several decades. Significant research and improvement in field methods have been (more)

Arop, Julius Bankong

2013-01-01T23:59:59.000Z

474

Hydraulic fracture mechanism in unconsolidated formations.  

E-Print Network [OSTI]

??Most models developed for hydraulic fracturing in unconsolidated sands are based on Linear Elastic Fracture Mechanics (LEFM) and tensile fracture (Mode I fracture). However, in (more)

Hosseini, Seyed Mehran

2012-01-01T23:59:59.000Z

475

ZZFS: A hybrid device and cloud file system for spontaneous users Michelle L. Mazurek*, Eno Thereska+, Dinan Gunawardena+, Richard Harper+, and James Scott+  

E-Print Network [OSTI]

. A single user would listen to music on device A, then later listen to the same music on device B whileZZFS: A hybrid device and cloud file system for spontaneous users Michelle L. Mazurek*, Eno- tency policies across a user's personal devices has always been hard. Unpredictable networks, capricious

476

All-Optical Modulation of Localized Surface Plasmon Coupling in a Hybrid System Composed of Photoswitchable Gratings and Au Nanodisk Arrays  

Science Journals Connector (OSTI)

All-Optical Modulation of Localized Surface Plasmon Coupling in a Hybrid System Composed of Photoswitchable Gratings and Au Nanodisk Arrays ... Components of this work were conducted at the Penn State node of the NSF-funded National Nanotechnology Infrastructure Network. ...

Yan Jun Liu; Yue Bing Zheng; Justin Liou; I-Kao Chiang; Iam Choon Khoo; Tony Jun Huang

2011-03-04T23:59:59.000Z

477

CSP Plant Thermal-hydraulic Simulation  

Science Journals Connector (OSTI)

Abstract In the frame of the development of new solar plants and their innovative components, our research activities focus on theoretical elaborations and simulation to support basic design and assistance to manufacturing. The aim is to describe the use of Relap5 code [1] for analyzing the thermal-hydraulic behavior of a CSP Plant based on parabolic through collectors. Here a fluid dynamic simulation of the Test Plant, situated at Casaccia Research Center, will be evaluated. For the first simulation, the filling and draining phase of the circuit has been considered. It has been simulated a time period corresponding to the plant starting with the switch on of the pump, the filling of the circuit, a steady state condition and the pump switching off until the complete draining of the circuit. This studies have been performed in different collectors configurations and different logics of the operation valves in order to define the better system control and the better operating procedure.

V. Russo

2014-01-01T23:59:59.000Z

478

Fuzzy logic electric vehicle regenerative antiskid braking and traction control system  

DOE Patents [OSTI]

An regenerative antiskid braking and traction control system using fuzzy logic for an electric or hybrid vehicle having a regenerative braking system operatively connected to an electric traction motor, and a separate hydraulic braking system includes sensors for monitoring present vehicle parameters and a processor, responsive to the sensors, for calculating vehicle parameters defining the vehicle behavior not directly measurable by the sensor and determining if regenerative antiskid braking control, requiring hydraulic braking control, and requiring traction control are required. The processor then employs fuzzy logic based on the determined vehicle state and provides command signals to a motor controller to control operation of the electric traction motor and to the brake controller to control fluid pressure applied at each vehicle wheel to provide the appropriate regenerative braking control, hydraulic braking control, and traction control.

Cikanek, Susan R. (Wixom, MI)

1994-01-01T23:59:59.000Z

479

An Adaptive Memory Interface Controller for Improving Bandwidth Utilization of Hybrid and Reconfigurable Systems  

SciTech Connect (OSTI)

Emerging applications such as data mining, bioinformatics, knowledge discovery, social network analysis are irregular. They use data structures based on pointers or linked lists, such as graphs, unbalanced trees or unstructures grids, which generates unpredictable memory accesses. These data structures usually are large, but difficult to partition. These applications mostly are memory bandwidth bounded and have high synchronization intensity. However, they also have large amounts of inherent dynamic parallelism, because they potentially perform a task for each one of the element they are exploring. Several efforts are looking at accelerating these applications on hybrid architectures, which integrate general purpose processors with reconfigurable devices. Some solutions, which demonstrated significant speedups, include custom-hand tuned accelerators or even full processor architectures on the reconfigurable logic. In this paper we present an approach for the automatic synthesis of accelerators from C, targeted at irregular applications. In contrast to typical High Level Synthesis paradigms, which construct a centralized Finite State Machine, our approach generates dynamically scheduled hardware components. While parallelism exploitation in typical HLS-generated accelerators is usually bound within a single execution flow, our solution allows concurrently running multiple execution flow, thus also exploiting the coarser grain task parallelism of irregular applications. Our approach supports multiple, multi-ported and distributed memories, and atomic memory operations. Its main objective is parallelizing as many memory operations as possible, independently from their execution time, to maximize the memory bandwidth utilization. This significantly differs from current HLS flows, which usually consider a single memory port and require precise scheduling of memory operations. A key innovation of our approach is the generation of a memory interface controller, which dynamically maps concurrent memory accesses to multiple ports. We present a case study on a typical irregular kernel, Graph Breadth First search (BFS), exploring different tradeoffs in terms of parallelism and number of memories.

Castellana, Vito G.; Tumeo, Antonino; Ferrandi, Fabrizio

2014-05-30T23:59:59.000Z

480

Dynamic Simulation of a Superinsulated Residential Structure with a Hybrid Desiccant Cooling System.  

E-Print Network [OSTI]

??This thesis explores the efficiency and performance of residential HVAC systems applied to new high performance buildings which meet the standards of the Passivhaus movement. (more)

O'Kelly, Matthew E.

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hydraulic hybrid systems" 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

A new hybrid pneumatic combustion engine to improve fuel consumption of windDiesel power system for non-interconnected areas  

Science Journals Connector (OSTI)

This paper presents an evaluation of an optimized Hybrid Pneumatic-Combustion Engine (HPCE) concept that permits reducing fuel consumption for electricity production in non-interconnected remote areas, originally equipped with hybrid WindDiesel System (WDS). Up to now, most of the studies on the pneumatic hybridization of Internal Combustion Engines (ICE) have dealt with two-stroke pure pneumatic mode. The few studies that have dealt with hybrid pneumatic-combustion four-stroke mode require adding a supplementary valve to charge compressed air in the combustion chamber. This modification means that a new cylinder head should be fabricated. Moreover, those studies focus on spark ignition engines and are not yet validated for Diesel engines. Present HPCE is capable of making a Diesel engine operate under two-stroke pneumatic motor mode, two-stroke pneumatic pump mode and four-stroke hybrid mode, without needing an additional valve in the combustion chamber. This fact constitutes this studys strength and innovation. The evaluation of the concept is based on ideal thermodynamic cycle modeling. The optimized valve actuation timings for all modes lead to generic maps that are independent of the engine size. The fuel economy is calculated for a known site during a whole year, function of the air storage volume and the wind power penetration rate.

Tammam Basbous; Rafic Younes; Adrian Ilinca; Jean Perron

2012-01-01T23:59:59.000Z

482

Monitoring a Complex Physical System using a Hybrid Dynamic Bayes Net Computer Science Dept.  

E-Print Network [OSTI]

) shown in Fig. 1 is a complex physical system designed and con- structed at NASA's Kennedy Space Center, includingproducing oxygen from the atmosphere on Mars and converting carbon dioxide to oxygen within closed human to slow changes such as gas composition that take hours to evolve. From a tracking perspective, the system

McIlraith, Sheila

483

Center for Sustainability Hybrid Renewable Energy Systems (HyRES) Laboratory  

E-Print Network [OSTI]

wind, solar, and hydrogen fuel cell technologies is planned for an experimental residence built at Penn is used to balance energy use, and surplus power used to make hydrogen for a fuel cell vehicle. Power System Features In case of multiple system failure - 25kW fuel cell (vehicle) - External hydrogen fuel

Lee, Dongwon

484

Measurements versus Predictions for a Hybrid (Hydrostatic plus Hydrodynamic Thrust Bearing for a Range of Orifice Diameters  

E-Print Network [OSTI]

A fixed geometry hybrid thrust bearing is investigated with three different supply orifice diameters. The test rig uses a face-to-face thrust bearing design, with the test bearing acting as the rotor loading mechanism. A hydraulic shaker applies...

Esser, Paul R.

2011-08-08T23:59:59.000Z

485

Power system operation risk analysis considering charging load self-management of plug-in hybrid electric vehicles  

Science Journals Connector (OSTI)

Abstract Many jurisdictions around the world are supporting the adoption of electric vehicles through incentives and the deployment of a charging infrastructure to reduce greenhouse gas emissions. Plug-in hybrid electric vehicles (PHEVs), with offer mature technology and stable performance, are expected to gain an increasingly larger share of the consumer market. The aggregated effect on power grid due to large-scale penetration of \\{PHEVs\\} needs to be analyzed. Nighttime-charging which typically characterizes \\{PHEVs\\} is helpful in filling the nocturnal load valley, but random charging of large PHEV fleets at night may result in new load peaks and valleys. Active response strategy is a potentially effective solution to mitigate the additional risks brought by the integration of PHEVs. This paper proposes a power system operation risk analysis framework in which charging load self-management is used to control system operation risk. We describe an interactive mechanism between the system and \\{PHEVs\\} in conjunction with a smart charging model is to simulate the time series power consumption of PHEVs. The charging load is managed with adjusting the state transition boundaries and without violating the users desired charging constraints. The load curtailment caused by voltage or power flow violation after outages is determined by controlling charging power. At the same time, the system risk is maintained under an acceptable level through charging load self-management. The proposed method is implemented using the Roy Billinton Test System (RBTS) and several PHEV penetration levels are examined. The results show that charging load self-management can effectively balance the extra risk introduced by integration of \\{PHEVs\\} during the charging horizon.

Zhe Liu; Dan Wang; Hongjie Jia; Ned Djilali

2014-01-01T23:59:59.000Z

486

Adaptive wavelet transform for vibration signal modelling and application in fault diagnosis of water hydraulic motor  

Science Journals Connector (OSTI)

There has been an increasing application of water hydraulics in industries due to growing concern on the environmental, health and safety issues. The fault diagnosis of water hydraulic motor is important for improving water hydraulic system reliability and performance. In this paper, fault diagnosis of water hydraulic motor in water hydraulic system is investigated based on adaptive wavelet analysis. A novel method for modelling the vibration signal based on the adaptive wavelet transform (AWT) is proposed. The linear combination of wavelets is introduced as wavelet itself and adapted for the particular vibration signal, which goes beyond adapting parameters of a fixed-shape wavelet. The AWT procedure based on the parametric optimisation by genetic algorithm (GA) is developed. The model-based method by AWT is applied to extract the features in the fault diagnosis of the water hydraulic motor. This technique for de-noising the corrupted simulation signal shows that it can improve the signal-to-noise ratio of the vibration signal. The results of the experimental signal demonstrate the characteristic vibration signal details in fine resolution. The magnitude plots of the continuous wavelet transform (CWT) show the characteristic signal's energy in time and frequency domain which can be used as feature values for fault diagnosis of water hydraulic motor.

H.X. Chen; Patrick S.K. Chua; G.H. Lim

2006-01-01T23:59:59.000Z

487

Advanced Methods Approach to Hybrid Powertrain Systems Optimization of a Transit Bus Application  

Broader source: Energy.gov [DOE]

Design refinements of the GTB-40 mass-transit bus include new optimization processes, subsystem, and powertrain system requirements along with traction motor, battery, and APU development and integration

488

Personal?computer?based control system for a 1.8 T hybrid wiggler  

Science Journals Connector (OSTI)

A control system has been developed for the 1.8 T wiggler to be delivered to the Synchrotron Radiation Research Center in Hsinchu Taiwan. The system serves three major functions: gap monitoring and control end?corrector adjustment and tracking and interlock safety and monitoring. The end correctors are programmed with a gap?following feature for compensation of the electron trajectory in both transverse planes at all gaps. Software and hardware interlocks are provided for overtravel limits and protection against excessive variation in gap from end to end. The system is designed for stand?alone operation as well as for compatibility with the SRRC central control system. Because the wiggler controller is based on a personal computer and uses the LabVIEW programming language it is readily adaptable for other wiggler or undulator applications.

D. C. Quimby; K. E. Robinson; D. R. Jander

1995-01-01T23:59:59.000Z

489

Hydraulic Geometry: Empirical Investigations and Theoretical Approaches  

E-Print Network [OSTI]

Hydraulic Geometry: Empirical Investigations and Theoretical Approaches B.C. Eatona, a Department are determined by the channel shape, gradient and a flow resistance parameter. A review of the literature Geomorphology April 21, 2010 #12;the research on downstream hydraulic geometry has focussed on the factors

Eaton, Brett

490

Ocean Thermal Gradient Hydraulic Power Plant  

Science Journals Connector (OSTI)

...for the probable life of the earth, only...low-pressure steam turbines pSrhaps hun-dreds...con-ventional hydraulic turbine under gravity flow...horizontally and the remaining available energy...through a hydraulic turbine to generatepower...between the liquid and gas-eous phases, with...

Earl J. Beck

1975-07-25T23:59:59.000Z

491

Numerical Modeling of Hydraulic Fracturing in Oil Sands  

E-Print Network [OSTI]

Hydraulic fracturing is a widely used and e cient technique for enhancing oil ... for analyzing hydraulic fracturing in rocks, are in general not satisfactory for oil...

2008-11-16T23:59:59.000Z

492

Finite element modeling of hydraulic fracturing in 3D  

E-Print Network [OSTI]

Mar 22, 2013 ... Two examples of hydraulic fracturing are given. when the pressure buildup ... Hydraulic fracturing is the coupled dynamics of frac- ture and ?uid...

2013-03-22T23:59:59.000Z

493

Seismic Studies of a Massive Hydraulic Fracturing Experiment...  

Open Energy Info (EERE)

a Massive Hydraulic Fracturing Experiment Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Seismic Studies of a Massive Hydraulic Fracturing...

494

Hydraulics and Well Testing of Engineered Geothermal Reservoirs...  

Open Energy Info (EERE)

Hydraulics and Well Testing of Engineered Geothermal Reservoirs Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Hydraulics and Well Testing of...

495

Fracture Evolution Following a Hydraulic Stimulation within an...  

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

Fracture Evolution Following a Hydraulic Stimulation within an EGS Reservoir Fracture Evolution Following a Hydraulic Stimulation within an EGS Reservoir Fracture Evolution...

496

Fracture Evolution Following a Hydraulic Stimulation within an...  

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

Fracture Evolution Following a Hydraulic Stimulation within an EGS Reservoir Fracture Evolution Following a Hydraulic Stimulation within an EGS Reservoir DOE Geothermal Peer Review...

497

Practical development of hybrid intelligent agent systems with SoSAA  

Science Journals Connector (OSTI)

The development of intelligent Multi Agent Systems (MAS) is a non-trivial task. While much past research has focused on high-level activities such as co-ordination and negotiation, the development of tools and strategies to address the lower-level concerns ...

Mauro Dragone; Rem W. Collier; David Lillis; Gregory M. P. O'Hare

2009-08-01T23:59:59.000Z

498

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

E-Print Network [OSTI]

, and plotting the output are also included. INTRODUCTION HVACSIM+, which stands for `HVAC SIMulation PLUS other systems', is a non-proprietary simulation package developed at the National Institute of Standards and Technology (NIST), Gaithersburg, Maryland, U.S.A. It is capable of modeling HVAC (heating, ventilation

499

Maximizing Return on Investment of a Grid-Connected Hybrid Electrical Energy Storage System  

E-Print Network [OSTI]

residential users to perform demand side management. There are several ways to perform demand side management) Derivation of an optimal HEES management policy to maximize the daily energy cost saving and (ii) Optimal fluctuates within a much smaller range compared to the demand. Figure 1 shows a 24-hour profile of system

Pedram, Massoud

500

Multiwalled carbon nanotube nanofluids used for heat dissipation in hybrid green energy systems  

Science Journals Connector (OSTI)

This study was conducted to characterize carbon nanotube (CNT)/water nanofluids (CNWNFs) and to apply the nanofluids in a heat-dissipation system of dual green energy sources. CNTs were mixed with water in weight fractions of 0.125%, 0.25%, and 0.5% ...

Yi-Hsuan Hung, Hung-Jhih Gu

2014-01-01T23:59:59.000Z