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Note: This page contains sample records for the topic "hybrid propulsion 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
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1

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

2

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

SciTech Connect

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

3

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

4

HybriDrive Propulsion System  

NLE Websites -- All DOE Office Websites (Extended Search)

HybriDrive HybriDrive ® Propulsion System Cleaner, smarter power for transit DOE/FTA Fuel Cell Research Priorities Workshop Washington, DC 7 June 2010 Bart W. Mancini Sr. Principal Systems Engineer BAE Systems Ph: 607-770-4103 bart.mancini@baesystems.com 2 Overview 3 * BAE Systems FC Experience / Deployments * Technology gaps/barriers to full commercialization of fuel cell buses * Well-to-wheels energy efficiency and emissions * Cost metrics * Bus integration issues * Fuel cell bus R&D needs * Future plans BAE Systems FC Experience / Deployments 4 * 1998 - Georgetown/FTA/DOE Fuel Cell Bus #1 (still serviceable) * UTC 100 kW Phosphoric Acid FC using on-board Methanol Reformate, Hybrid propulsion & Electric accessories * 2000 - Georgetown/FTA/DOE Fuel Cell Bus #2 (retired) *

5

A new marine propulsion system  

Science Journals Connector (OSTI)

A new marine propulsion system is proposed. A small liquid sodium ... thruster combined with spray-water thruster works as propulsion. The configuration and characteristics of this system are described. Such a nu...

Wei-shi Han; Tao Liu

2003-06-01T23:59:59.000Z

6

Hypersonic missile propulsion system  

SciTech Connect

Pratt and Whitney is developing the technology for hypersonic components and engines. A supersonic combustion ramjet (scramjet) database was developed using hydrogen fueled propulsion systems for space access vehicles and serves as a point of departure for the current development of hydrocarbon scramjets. The Air Force Hypersonic Technology (HyTech) Program has put programs in place to develop the technologies necessary to demonstrate the operability, performance and structural durability of an expendable, liquid hydrocarbon fueled scramjet system that operates from Mach 4 to 8. This program will culminate in a flight type engine test at representative flight conditions. The hypersonic technology base that will be developed and demonstrated under HyTech will establish the foundation to enable hypersonic propulsion systems for a broad range of air vehicle applications from missiles to space access vehicles. A hypersonic missile flight demonstration is planned in the DARPA Affordable Rapid Response Missile Demonstrator (ARRMD) program in 2001.

Kazmar, R.R.

1998-11-01T23:59:59.000Z

7

Multi-Disciplinary Decision Making and Optimization for Hybrid Electric Propulsion Systems  

SciTech Connect

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

8

Final Report: Use of Graphite Foam as a Thermal Performance Enhancement of Heavy Hybrid Propulsion Systems  

SciTech Connect

Oak Ridge National Laboratory's graphite foam has the potential to be used as a heat exchanger for the Army's Future Combat System Manned Ground Vehicle and thus has the potential to improve its thermal performance. The computational fluid dynamics (CFD) program FLOW3D was used to develop a new CFD model for the graphite foam to be used in the development of a proper heat exchanger. The program was calibrated by first measuring the properties of the solid foams and determining the parameters to be used in the CFD model. Then the model was used to predict within 5% error the performance of finned foam heat sinks. In addition, the f factors and j factors commonly used to predict pressure drop and heat transfer were calculated for both the solid and finned structures. There was some evidence that corrugating the foams would yield higher j/f ratios than state of the art heat exchangers, confirming previously measured data. Because the results show that the CFD model was validated, it is recommended that the funding for Phases 2 through 5 be approved for the design of both the finned heat exchanger using tubes and round fin structures and the solid foam design using corrugated foams. It was found that the new CFD model using FLOW3D can predict both solid foam heat transfer and finned foam heat transfer with the validated model parameters. In addition, it was found that the finned foam structures exhibited j/f ratios that indicate that significant heat transfer is occurring within the fin structures due to aerodynamically induced flow, which is not present in solid aluminum fin structures. It is possible that the foam surfaces can act as turbulators that increase heat transfer without affecting pressure drop, like the vortex generators seen in state of the art heat exchangers. These numbers indicate that the foam can be engineered into an excellent heat exchanger. It was also found that corrugating the solid foams would increase the j/f ratio dramatically, allowing the solid foams to compete directly with standard heat exchangers. Although corrugated L1 foam samples have not been produced (attempts are under way), it is possible that their j/f ratio can be even higher than those of the finned structures.

Klett, James William [ORNL; Conklin, Jim [ORNL

2011-06-01T23:59:59.000Z

9

Hybrid Rocket Propulsion for Future Space Launch  

E-Print Network (OSTI)

: Oxidizer: Liquid Fuel: Solid 2 Fuel and oxidizer are physically separated One of the two is in solid phase Reverse Hybrids: Oxidizer: Solid Fuel: Liquid #12;Aero/Astro 50th Year Anniversary Hybrid Rocket System Solid Fuel · Polymers: Thermoplastics, (Polyethylene, Plexiglas), Rubbers (HTPB) · Wood, Trash, Wax

Stanford University

10

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

SciTech Connect

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

11

Full Fuel-Cycle Comparison of Forklift Propulsion Systems | Department...  

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

Full Fuel-Cycle Comparison of Forklift Propulsion Systems Full Fuel-Cycle Comparison of Forklift Propulsion Systems This report examines forklift propulsion systems and addresses...

12

Vehicle Technologies Office: Hybrid and Vehicle Systems  

NLE Websites -- All DOE Office Websites (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

13

Enabling Green Energy and Propulsion Systems via Direct Noise...  

NLE Websites -- All DOE Office Websites (Extended Search)

GE propulsion systems Enabling Green Energy and Propulsion Systems via Direct Noise Computation PI Name: Umesh Paliath PI Email: paliath@ge.com Institution: GE Global Research...

14

Self Excited Vibration in a Specialised Electric Propulsion System  

Science Journals Connector (OSTI)

Special marine propulsion applications demand efficient manoeuvrability under extreme conditions. ... , vibration resonance and radiated noise from the propulsion shafting system must be kept to a ... purpose ves...

Don Chool Lee; Ronald D. Barro

2014-09-01T23:59:59.000Z

15

Integration of Electric Propulsion Systems with Spacecraft An Overview  

E-Print Network (OSTI)

electric propulsion systems are currently being developed ­ ranging from high-power (i.e., >10 kW) systems-propulsion systems to be used on small satellites? In the context of direct-drive electric propulsion? 1 Research1 Integration of Electric Propulsion Systems with Spacecraft ­ An Overview Thomas M. Liu1

Walker, Mitchell

16

GLC Analysis of Organic Chelating Agents in Steam Propulsion Systems  

Science Journals Connector (OSTI)

......Chelating Agents in Steam Propulsion Systems by Paul J. Sniegoski...iminodi- acetic acid) in steam propulsion systems. For chromatogra...as an addi- tive to steam propulsion systems to prevent build-up...Fourth Internaval Conference on Marine Cor- rosion, Naval Research......

Paul J. Sniegoski; David L. Venezky

1974-06-01T23:59:59.000Z

17

H? controller and bumpless transfer design for marine propulsion system  

Science Journals Connector (OSTI)

A method for controller design and switching controller without bump effect has been proposed for a marine propulsion system with diesel engine used as propeller prime-mover. Due to different regimens operation of ship propulsion, it is common practice ... Keywords: H controller, bumpless transfer, ship propulsion system

M. J. Lopez; L. Garcia; J. Lorenzo; A. Consegliere

2009-12-01T23:59:59.000Z

18

CMC intake ramp for hypersonic propulsion systems  

SciTech Connect

An alternative technology to produce CMC structural components with lower costs and shorter manufacturing times has been developed at the DLR. The process is based on liquid silicon infiltration (LSI) into porous carbon/carbon resulting in a C/C-SiC material whereby the load carrying fibres are internally protected against oxidation by SiC. The material`s adequate strength levels and the high reproducibility of the state-of-the-art process now allows the realization of CMC components. Representing a very complex structure of high integrity, an intake ramp for a hypersonic propulsion system has been designed, manufactured and tested, which is described in this paper.

Kochendoerfer, R.; Krenkel, W. [Institute of Structures and Design, Stuttgart, (Germany)

1995-12-01T23:59:59.000Z

19

Enabling Green Energy and Propulsion Systems via Direct Noise...  

NLE Websites -- All DOE Office Websites (Extended Search)

Umesh Paliath, GE Global Research; Joe Insley, Argonne National Laboratory Enabling Green Energy and Propulsion Systems via Direct Noise Computation PI Name: Umesh Paliath PI...

20

Large-Eddy Simulation for Green Energy and Propulsion Systems...  

NLE Websites -- All DOE Office Websites (Extended Search)

Large-Eddy Simulation for Green Energy and Propulsion Systems PI Name: Umesh Paliath PI Email: paliath@ge.com Institution: General Electric Allocation Program: INCITE Allocation...

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

Heatpipe space power and propulsion systems  

SciTech Connect

Safe, reliable, low-mass space power and propulsion systems could have numerous civilian and military applications. This paper discusses two fission-powered concepts: the Heatpipe Power System (HPS) that provides power only, and the Heatpipe Bimodal System (HBS) that provides both power and thermal propulsion. Both concepts have 10 important features. First, only existing technology and recently tested fuel forms are used. Second, fuel can be removed whenever desired, greatly facilitating system fabrication and handling. Third, full electrically heated system testing is possible, with minimal operations required to replace the heaters with fuel and ready the system for launch. Fourth, the systems are passively subcritical during launch accidents. Fifth, a modular approach is used, and most technical issues can be resolved with inexpensive module tests. Sixth, bonds between dissimilar metals are minimized. Seventh, there are no single point failures during power mode operation. Eighth, fuel burnup rate is quite low to help ensure greater than 10-year system life. Ninth, there are no pumped coolant loops, and the systems can be shut down and restarted without coolant freeze/thaw concerns. Finally, a full ground nuclear test is not needed, and development costs will be low. The baseline HPS uses SNAP-10A-style thermoelectric power converters to produce 5 kWe at a system mass of about 500 kg. The unicouple thermoelectric converters have a hot shoe temperature of 1275 K and reject waste heat at 775 K. This type of thermoelectric converter has been used extensively by the space program, demonstrating an operational lifetime of decades. At higher thermal power, the same core can produce over 10 kWe using thermoelectric converters, and over 50 kWe using advanced power conversion systems.

Houts, M.G.; Poston, D.I.; Ranken, W.A.

1995-07-01T23:59:59.000Z

22

The Gasdynamic Mirror Fusion Propulsion System -- Revisited  

SciTech Connect

Many of the previous studies assessing the capability of the gasdynamic mirror (GDM) fusion propulsion system employed analyses that ignored the 'ambipolar' potential. This electrostatic potential arises as a result of the rapid escape of the electrons due to their small mass. As they escape, they leave behind an excess positive charge which manifests itself in an electric field that slows down the electrons while speeding up the ions until their respective axial diffusions are equalized. The indirect effect on the ions is that their confinement time is reduced relative to that of zero potential, and hence the plasma length must be increased to accommodate that change. But as they emerge from the thruster mirror - which serves as a magnetic nozzle - the ions acquire an added energy equal to that of the potential energy, and that in turn manifests itself in increased specific impulse and thrust. We assess the propulsive performance of the GDM thruster, based on the more rigorous theory, by applying it to a round trip Mars mission employing a continuous burn acceleration/deceleration type of trajectory. We find that the length of the device and travel time decrease with increasing plasma density, while the total vehicle mass reaches a minimum at a plasma density of 3 x 1016 cm-3. At such a density, and an initial DT ion temperature of 10 keV, a travel time of 60 days is found to be achievable at GDM propulsion parameters of about 200,000 seconds of specific impulse and approximately 47 kN of thrust.

Kammash, Terry [Department of Nuclear Engineering and Radiological Sciences, University of Michigan, 2355 Bonisteel Blvd, Ann Arbor, MI 48109 (United States); Tang, Ricky [Department of Aerospace Engineering, University Michigan, 1320 Beal Ave, Ann Arbor, MI 48109 (United States)

2005-02-06T23:59:59.000Z

23

2006-01-0443 Engine-in-the-Loop Testing for Evaluating Hybrid Propulsion  

E-Print Network (OSTI)

at the vehicle level. INTRODUCTION Diesel engines are particularly suited for medium-duty vehicles due in controlling engine operation and generally reduce the total mass of exhaust. However, it may not be possible2006-01-0443 Engine-in-the-Loop Testing for Evaluating Hybrid Propulsion Concepts and Transient

Peng, Huei

24

Performance of a boundary layer ingesting propulsion system  

E-Print Network (OSTI)

This thesis presents an assessment of the aerodynamic performance of an aircraft propulsion system, with embedded engines, in the presence of aircraft fuselage boundary layer ingestion (BLI). The emphasis is on defining ...

Plas, Anglique (Anglique Pascale)

2006-01-01T23:59:59.000Z

25

Experimental Flash Pyrolysis of High Density1 PolyEthylene under Hybrid Propulsion Conditions2  

E-Print Network (OSTI)

1/25 Experimental Flash Pyrolysis of High Density1 PolyEthylene under Hybrid Propulsion Conditions2 Poly-Ethylene (HDPE) is studied6 up to 20 000 K.s-1 , under pressure up to 3.0 MPa and at temperature Pyrolysis (2013) 1-11" DOI : 10.1016/j.jaap.2013.02.014 #12;2/25 Keywords: Polyethylene; flash pyrolysis

Boyer, Edmond

26

DOE Scientist Earns Chairman's Award from Propulsion and Power Systems  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Scientist Earns Chairman's Award from Propulsion and Power Scientist Earns Chairman's Award from Propulsion and Power Systems Alliance DOE Scientist Earns Chairman's Award from Propulsion and Power Systems Alliance October 2, 2009 - 1:00pm Addthis Washington, DC - A researcher at the Office of Fossil Energy's National Energy Technology Laboratory (NETL) has been presented with the Chairman's Award by the Propulsion and Power Systems Alliance (PPSA). Mary Anne Alvin, a physical scientist in NETL's Office of Research and Development, was recognized for her lead role in revitalizing the PPSA Materials Technical Area Team. This prestigious award is only given during a year when outstanding service is observed. The PPSA was formed in 1999 with the mission of improving coordination and collaboration among government agencies to better leverage existing federal

27

Design tool needs for space nuclear propulsion systems  

SciTech Connect

The interest in a return trip for humans to the moon and a pioneering voyage to Mars has rekindled interest in the use of nuclear reactors to provide propulsion for both piloted and robotic space vehicles. Two types of nuclear reactor-based propulsion systems are currently envisioned: nuclear thermal propulsion (NTP) and nuclear electric propulsion (NEP). The former relies on the direct heating and exhaust of a propellant within the core of the reactor, while the latter utilizes ion thruster engines for propulsion, and the nuclear reactor supplies the large amount of electrical power required to drive the engines. Another direct contrast between the NTP and NEP concepts is the length of reactor operation. The NTP nuclear rocket core is required to produce large amounts of thermal power for relatively short bursts (on the order of minutes to hours), and the NEP reactor core operates for a much longer period of time (on the order of days to months) with a steady-state electrical power output. The design of these types of nuclear reactor systems requires the use of specific analysis tools, some of which already exist and others that need considerable development. The general areas in which design tools are needed in the development of systems for space nuclear propulsion include the following: (1) neutronics design - both steady-state and transient applications including thermal feedback effects; (2) thermal-hydraulics design - again, both steady-state and transient applications with coupling to and from the neutronics design codes; (3) materials analysis tools - due to the high temperatures and high stresses required for efficient propulsion operation, increased importance will be placed on understanding the material responses; and (4) systems analysis - these codes allow optimizaiton of the entire propulsion system.

Klein, A.C. (Oregon State Univ., Corvallis (United States)); Lewis, B.R. (Atom Analysis, Inc., Portland, OR (United States))

1992-01-01T23:59:59.000Z

28

Vehicle Technologies Office: Propulsion Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Materials Manufacturers use propulsion (or powertrain) materials in the components that move vehicles of every size and shape. Conventional vehicles use these materials in components such as the engine, transmission, fuel system, and exhaust after-treatment systems. Electric drive vehicles use propulsion materials in their electric motors and power electronics. Developing advanced propulsion materials is essential to commercializing new, highly efficient automotive technologies that have technical requirements that existing powertrain materials cannot meet. The Vehicle Technology Office's (VTO) research in propulsion materials focuses on four areas: Materials for hybrid and electric drive systems Materials for high efficiency combustion engines Materials to enable energy recovery systems and control exhaust gases

29

Photon Tools for Fuel Spray Studies in Aerospace Propulsion Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

Tools for Fuel Spray Studies in Aerospace Tools for Fuel Spray Studies in Aerospace Propulsion Systems Kuo-Cheng Lin, 1 Campbell D. Carter, 2 and Stephen A. Schumaker 3 1 Taitech, Inc., 1430 Oak Court, Suite 301, Beavercreek, OH 45430, USA; 2 Air Force Research Laboratory, Wright-Patterson Air Force Base, OH 45433, USA; 3 Air Force Research Laboratory, Edwards Air Force Base, CA 93524, USA Fuel injection plays an important role in establishing stable and efficient combustion inside the combustor of a liquid-fueled aerospace propulsion system. Depending on the application of interest, fuel injection conditions range from high-speed crossflows in the air-breathing propulsion systems to quiescent environments with extremely high pressures in the rocket engines. In addition to the typical liquid

30

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

31

A Novel Simulation System for Marine Main Diesel Propulsion Remote Control  

Science Journals Connector (OSTI)

The purpose of the paper is to develop a novel simulation system for ship propulsion plant. The nonlinear mathematical model of main propulsion system of a large container ship is established, consisting of the large low speed two-stroke diesel engine, ... Keywords: simulation system, large-scale low-speed two-stroke diesel engine, marine main diesel propulsion

Yang Yang; Chen Guo; Jian-bo Sun; De-wen Yan

2011-11-01T23:59:59.000Z

32

Effect of chordwise flexibility and depth of submergence on an oscillating plate underwater propulsion system  

E-Print Network (OSTI)

by fish and some other marine animals. The primary attention was the propulsive characteristics propulsion system by Oleksandr Barannyk B.Sc. in Mathematics and Computer Sciences, Poltava State University underwater propulsion system by Oleksandr Barannyk B.Sc. in Mathematics and Computer Sciences, Poltava State

Victoria, University of

33

Enabling Green Energy and Propulsion Systems via Direct Noise Computation |  

NLE Websites -- All DOE Office Websites (Extended Search)

High-fidelity simulation of exhaust nozzle under installed configuration High-fidelity simulation of exhaust nozzle under installed configuration Umesh Paliath, GE Global Research; Joe Insley, Argonne National Laboratory Enabling Green Energy and Propulsion Systems via Direct Noise Computation PI Name: Umesh Paliath PI Email: paliath@ge.com Institution: GE Global Research Allocation Program: INCITE Allocation Hours at ALCF: 105 Million Year: 2013 Research Domain: Engineering GE Global Research is using the Argonne Leadership Computing Facility (ALCF) to deliver significant improvements in efficiency, (renewable's) yield and lower emissions (noise) for advanced energy and propulsion systems. Understanding the fundamental physics of turbulent mixing has the potential to transform product design for components such as airfoils and

34

Optimization of Marine Propulsion Systems Alignment for Aged Ships  

Science Journals Connector (OSTI)

The paper presents a numerical method of identification parameters of marine power transmission systems alignment in the ... engine and the second one with slow-speed propulsion system. Multivariant computations...

Lech Murawski; Wieslaw Ostachowicz

2010-01-01T23:59:59.000Z

35

Integrated Design Platform for Marine Electric Propulsion System  

Science Journals Connector (OSTI)

As the modern vessels have become more complex comprising an increasing number of heterogeneous interdependent subsystems. This increased complexity requires new methods for the design and operation of these marine systems. An integrated design platform for marine electric propulsion system which aims to characteristic analysis of plants and systems, DCS control algorithm trim, intelligent control strategy develop of automation and operation is presented in this paper. The design process and thoughts is described in details, and the current work is introduced. The main focus of this paper is in the development of marine integrated design platform which seeks to shift ship design to a distribution, intelligent control architecture through increased automation.

Chen Yutao; Zeng Fanming; Wu Jiaming

2012-01-01T23:59:59.000Z

36

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

37

High power density propulsion/power system for underwater applications  

SciTech Connect

This patent describes a drive system for an underwater vehicle utilizing open Rankine thermodynamic cycle system having water as working fluid; steam generation means for receiving the working fluid and converting the working fluid to steam; an energy converter adapted to receive the steam and drive a propulsion means; a mixing condenser adapted to receive the steam exits the energy converter and condense the steam to a liquid; means for introducing water into the mixing condensers from a source external to the Rankine cycle, the water mixing with the working fluid to form mixed work fluid.

Blau, A.

1992-06-02T23:59:59.000Z

38

ADVANCED RADIOISOTOPE HEAT SOURCE AND PROPULSION SYSTEMS FOR PLANETARY EXPLORATION  

SciTech Connect

The exploration of planetary surfaces and atmospheres may be enhanced by increasing the range and mobility of a science platform. Fundamentally, power production and availability of resources are limiting factors that must be considered for all science and exploration missions. A novel power and propulsion system is considered and discussed with reference to a long-range Mars surface exploration mission with in-situ resource utilization. Significance to applications such as sample return missions is also considered. Key material selections for radioisotope encapsulation techniques are presented.

R. C. O'Brien; S. D. Howe; J. E. Werner

2010-09-01T23:59:59.000Z

39

High Fidelity Radiative Thermal Transport Simulations of a Scramjet Propulsion System.  

E-Print Network (OSTI)

??Scramjets are a type of air breathing propulsion system that have the potential to efficiently provide thrust for atmospheric vehicles at high speeds. Defining the (more)

Irvine, Adam Glenn

2013-01-01T23:59:59.000Z

40

Research on simulation of ship electric propulsion system with flywheel energy storage system  

Science Journals Connector (OSTI)

Flywheel energy storage has been widely used to ... electric power quality. This paper designed a flywheel energy storage device to improve ship electric propulsion system power grid quality. The practical mathem...

Chunling Xie; Conghui Zhang; Jen-Yuan James Chang

2011-06-01T23:59:59.000Z

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

Research on simulation of ship electric propulsion system with flywheel energy storage system  

Science Journals Connector (OSTI)

Flywheel energy storage has been widely used to improve the ground electric power quality. This paper designed a flywheel energy storage device to improve ship electric propulsion system power grid quality. The practical mathematical models of flywheel ...

Chunling Xie; Conghui Zhang; Jen-Yuan James Chang

2011-06-01T23:59:59.000Z

42

Integrated null-flux suspension and multiphase propulsion system for magnetically-levitated vehicles  

DOE Patents (OSTI)

This report discusses a propulsion and stabilization system comprising a series of figure 8 coils mounted vertically on the walls of the guideway to provide suspension, lateral guidance and propulsion of a magnetically levitated vehicle. This system further allows for altering the magnetic field effects by changing the relative position of the loops comprising the figure 8 coils either longitudinally and/or vertically with resulting changes in the propulsion, the vertical stability, and the suspension.

Rote, D.M.; He, Jianliang; Johnson, L.R.

1992-01-01T23:59:59.000Z

43

Investigation of propulsion system for large LNG ships  

Science Journals Connector (OSTI)

Requirements to move away from coal for power generation has made LNG as the most sought after fuel source, raising steep demands on its supply and production. Added to this scenario is the gradual depletion of the offshore oil and gas fields which is pushing future explorations and production activities far away into the hostile environment of deep sea. Production of gas in such environment has great technical and commercial impacts on gas business. For instance, laying gas pipes from deep sea to distant receiving terminals will be technically and economically challenging. Alternative to laying gas pipes will require installing re-liquefaction unit on board FPSOs to convert gas into liquid for transportation by sea. But, then because of increased distance between gas source and receiving terminals the current medium size LNG ships will no longer remain economical to operate. Recognizing this business scenario shipowners are making huge investments in the acquisition of large LNG ships. As power need of large LNG ships is very different from the current small ones, a variety of propulsion derivatives such as UST, DFDE, 2-Stroke DRL and Combined cycle GT have been proposed by leading engine manufacturers. Since, propulsion system constitutes major element of the ship's capital and life cycle cost, which of these options is most suited for large LNG ships is currently a major concern of the shipping industry and must be thoroughly assessed. In this paper the authors investigate relative merits of these propulsion options against the benchmark performance criteria of BOG disposal, fuel consumption, gas emissions, plant availability and overall life cycle cost.

R P Sinha; Wan Mohd Norsani Wan Nik

2012-01-01T23:59:59.000Z

44

Fault detection and diagnosis of a gearbox in marine propulsion systems using bispectrum analysis and artificial neural networks  

Science Journals Connector (OSTI)

A marine propulsion system is a very complicated system composed ... to the impact of the other components in marine propulsion systems. To monitor the gear conditions, ... fault features of the vibrant signal of...

Zhixiong Li; Xinping Yan; Chengqing Yuan

2011-03-01T23:59:59.000Z

45

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

46

Full Fuel-Cycle Comparison of Forklift Propulsion Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

3 3 Full Fuel-Cycle Comparison of Forklift Propulsion Systems Energy Systems Division About Argonne National Laboratory Argonne is a U.S. Department of Energy laboratory managed by UChicago Argonne, LLC under contract DE-AC02-06CH11357. The Laboratory's main facility is outside Chicago, at 9700 South Cass Avenue, Argonne, Illinois 60439. For information about Argonne, see www.anl.gov. Availability of This Report This report is available, at no cost, at http://www.osti.gov/bridge. It is also available on paper to the U.S. Department of Energy and its contractors, for a processing fee, from: U.S. Department of Energy Office of Scientific and Technical Information P.O. Box 62 Oak Ridge, TN 37831-0062 phone (865) 576-8401

47

Full Fuel-Cycle Comparison of Forklift Propulsion Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

Full Fuel-Cycle Comparison Full Fuel-Cycle Comparison of Forklift Propulsion Systems ANL/ESD/08-3 Energy Systems Division Availability of This Report This report is available, at no cost, at http://www.osti.gov/bridge. It is also available on paper to the U.S. Department of Energy and its contractors, for a processing fee, from: U.S. Department of Energy Office of Scientific and Technical Information P.O. Box 62 Oak Ridge, TN 37831-0062 phone (865) 576-8401 fax (865) 576-5728 reports@adonis.osti.gov Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor UChicago Argonne, LLC, nor any of their employees or officers, makes any warranty, express

48

Design, fabrication and analysis of a body-caudal fin propulsion system for a microrobotic fish  

E-Print Network (OSTI)

Design, fabrication and analysis of a body-caudal fin propulsion system for a microrobotic fish Kyu and fabrica- tion of a centimeter-scale propulsion system for a robotic fish. The key to the design are customized to provide the necessary work output for the microrobotic fish. The flexure joints, electrical

Wood, Robert

49

RESEARCH TRAINING GROUP GRK 1095/1: "AERO-THERMODYNAMIC DESIGN OF A SCRAMJET PROPULSION SYSTEM"  

E-Print Network (OSTI)

RESEARCH TRAINING GROUP GRK 1095/1: "AERO-THERMODYNAMIC DESIGN OF A SCRAMJET PROPULSION SYSTEM" U conception. In this context only the use of a scramjet-propulsion system meets all the aerodynamic it must be mentioned that scramjet-technologies are one of the key technologies for hypersonic flight

50

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

51

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

52

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

53

Hybrid Thin Film Deposition System | EMSL  

NLE Websites -- All DOE Office Websites (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...

55

Research on propeller dynamic load simulation system of electric propulsion ship  

Science Journals Connector (OSTI)

A dynamic marine propeller simulation system was developed, which is ... requirement of theory research and engineering design of marine electric propulsion system. By applying an actual ship parameter...J? ? K ...

Hui Huang ? ?; Ai-di Shen ???; Jian-xin Chu ???

2013-04-01T23:59:59.000Z

56

FedEx Gasoline Hybrid Electric Delivery Truck Evaluation: 6-Month...  

NLE Websites -- All DOE Office Websites (Extended Search)

each of these systems. These systems and specific components of interest include: * Vehicle Systems o Engine o Hybrid propulsion system o Brakes * Vehicle Components o Brake...

57

A comprehensive study of electric propulsion system for vehicular application  

Science Journals Connector (OSTI)

Electrification of vehicular systems partial or complete has emerged as an attractive and sustainable alternative for futuristic transportation systems. This so-called electric vehicular technology (EVT) has engaged auto-manufacturers and researchers to primarily focus on fuel economy driving range performance and costs. These parameters are influenced by the design and performance of electric propulsion system (EPS) for vehicular application and its suitable integration with various electrical and mechanical apparatus. This paper primarily presents a comprehensive study of EPS. To present the study in synthesis a survey of important constituents of EPS is first carried out with techno-economic perspectives. Contemporary configurations of conventional and electrified vehicles are then discussed along with their respective advantages and limitations. EPS is considered to be the heart of EVT and therefore components of a standard EPS are discussed and comparative analyses are carried out in terms of present trends ongoing technological advancements and future challenges. In addition power flow control and management algorithms for EVT are also briefed.

Lalit Kumar

2014-01-01T23:59:59.000Z

58

Assessment of propfan propulsion systems for reduced environmental impact  

E-Print Network (OSTI)

Current aircraft engine designs tend towards higher bypass ratio, low-speed fan designs for improved fuel burn, reduced emissions and noise. Alternative propulsion concepts include counter-rotating propfans (CRPs) which ...

Peters, Andreas, Ph. D. Massachusetts Institute of Technology

2010-01-01T23:59:59.000Z

59

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

SciTech Connect

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

60

Radioisotope electric propulsion of sciencecraft to the outer solar system and near-interstellar space  

SciTech Connect

Recent results are presented in the study of radioisotope electric propulsion as a near-term technology for sending small robotic sciencecraft to the outer Solar System and near-interstellar space. Radioisotope electric propulsion (REP) systems are low-thrust, ion propulsion units based on radioisotope electric generators and ion thrusters. Powerplant specific masses are expected to be in the range of 100 to 200 kg/kW of thrust power. Planetary rendezvous missions to Pluto, fast missions to the heliopause (100 AU) with the capability to decelerate an orbiter for an extended science program and prestellar missions to the first gravitational lens focus of the Sun (550 AU) are investigated.

Noble, R.J.

1998-08-01T23:59:59.000Z

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

Dynamic analysis and design of air spring mounting system for marine propulsion system  

Science Journals Connector (OSTI)

Abstract Marine propulsion unit (MPU) is one of the dominant vibration and noise sources onboard ship. Its vibration can be attenuated effectively by isolating MPU with low-frequency mounting system. But this is difficult to implement due to the stringent requirement of MPU alignment with the propulsion shafting. In this paper a novel air spring mounting system (ASMS) for propulsion system is proposed consisting of air spring subsystem, alignment control subsystem and safety protection subsystem. The load distribution optimization method and dynamic model of ASMS are presented. The factors that affect system stability and natural frequencies are analyzed, as well as the design measures to enhance system performance. A theoretical model is presented to estimate the isolation effect of ASMS. The monitoring model of alignment between MPU and propulsion shafting is established, followed by the alignment control algorithm and converge rule which assures the fast and uniform convergence of both air springs? load distribution and alignment control process. Safety protection mechanism is designed to ensure that the MPU can operate safely in case of ASMS failure or other extreme circumstances. A scaled ASMS prototype is manufactured and tested on a special experimental setup. Experimental results validate the effectiveness of theoretical models and show that the performance of ASMS satisfies the operation requirements of MPU.

Lin He; Wei Xu; Wenjun Bu; Liang Shi

2014-01-01T23:59:59.000Z

62

Advanced Fusion Reactors for Space Propulsion and Power Systems  

SciTech Connect

In recent years the methodology proposed for conversion of light elements into energy via fusion has made steady progress. Scientific studies and engineering efforts in advanced fusion systems designs have introduced some new concepts with unique aspects including consideration of Aneutronic fuels. The plant parameters for harnessing aneutronic fusion appear more exigent than those required for the conventional fusion fuel cycle. However aneutronic fusion propulsion plants for Space deployment will ultimately offer the possibility of enhanced performance from nuclear gain as compared to existing ionic engines as well as providing a clean solution to Planetary Protection considerations and requirements. Proton triggered 11Boron fuel (p- 11B) will produce abundant ion kinetic energy for In-Space vectored thrust. Thus energetic alpha particles' exhaust momentum can be used directly to produce high Isp thrust and also offer possibility of power conversion into electricity. p-11B is an advanced fusion plant fuel with well understood reaction kinematics but will require some new conceptual thinking as to the most effective implementation.

Chapman, John J.

2011-06-15T23:59:59.000Z

63

James Walker develops Walkersele D8 a new rotary lip seal for marine propulsion systems  

Science Journals Connector (OSTI)

Walkersele D8 is a new design of rotary lip seal developed by James Walker & Co Ltd for use in marine propulsion systems to protect bearings from water ingress or prevent lubricant from leaking into the marine environment.

2012-01-01T23:59:59.000Z

64

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

65

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

66

Propulsion Materials R&D | Clean Energy | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Propulsion Materials Propulsion Materials SHARE Propulsion Materials Improve Powertrains Oak Ridge National Laboratory's transportation research and development in the area of Propulsion Materials is designed to identify and develop advanced materials and processes that improve powertrain system efficiency and reduce emissions. Cutting-edge materials research is crucial to enabling new vehicle technologies that are reliable, fuel efficient, and clean. ORNL researchers, in close collaboration with US industry, are focusing on materials for advanced engines, hybrid and electric drive systems, and vehicle exhaust systems. These materials promote a variety of performance benefits, including lightweighting, higher temperature capabilities, emissions reduction, thermal management, and corrosion mitigation.

67

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.

68

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.

69

The CU Aerospace / VACCO CubeSat High Impulse Propulsion System (CHIPS) offers a miniaturized and  

E-Print Network (OSTI)

· Overall control authority: roll, pitch, yaw, +/- Z · On-orbit update of system parameters, including · System two-failure-tolerant against leakage · Life span: 2+ years from propellant load. · HighThe CU Aerospace / VACCO CubeSat High Impulse Propulsion System (CHIPS) offers a miniaturized

Carroll, David L.

70

Design methodology based on H? control theory for marine propulsion system with bumpless transfer function  

Science Journals Connector (OSTI)

In this paper we propose a control system design methodology which has two main objectives: the first one is to achieve control system specifications for a local H? controller designed for a given operation condition, and the second ... Keywords: H controller, bumpless transfer, ship propulsion system

M. J. Lopez; L. Garcia; J. Lorenzo; A. Consegliere

2010-03-01T23:59:59.000Z

71

The Use of Steady and Pulsed Detonations for Propulsion Systems  

SciTech Connect

Objectives of the ODWE concept studies are: demonstrate the feasibility of the oblique detonation wave engine (ODWE) for hypersonic propulsion; demonstrate the existance and stability of an oblique detonation wave in hypersonic wind tunnels; develop engineering codes which predict the performance characteristics of the ODWE including specific impulse and thrust coefficients for various operating conditions; develop multi-dimensional computer codes which can model all aspects of the ODWE including fuel injection, mixing, ignition, combustion and expansion with fully detailed chemical kinetics and turbulence models; and validate the codes with experimental data use the simulations to predict the ODWE performance for conditions not easily obtained in wind tunnels.

Adelman, H.G.; Menees, G.P.; Cambier, J.L.; Bowles, J.V.

1996-02-01T23:59:59.000Z

72

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

73

Development of 1 MW-class HTS motor for podded ship propulsion system  

Science Journals Connector (OSTI)

To reduce fuel consumption and lead to a major reduction of pollution from NOx, SOx and CO2, the electric ship propulsion system is one of the most prospective substitutes for conventional ship propulsion systems. In order to spread it, innovative technologies for the improvement of the power transmission are required. The high temperature superconducting technology has the possibility for a drastic reduction of power transmission loss. Recently, electric podded propulsions have become popular for large cruise vessels, icebreakers and chemical tankers because of the flexibility of the equipment arrangement and the stern hull design, and better maneuverability in harbour, etc. In this paper, a 1 MW-class High temperature superconducting (HTS) motor with high efficiency, smaller size and simple structure, which is designed and manufactured for podded propulsion, is reported. For the case of a coastal ship driven by the optimized podded propulsion in which the 1MW HTS motor is equipped, the reductions of fluid dynamic resistance and power transmission losses are demonstrated. The present research & development has been supported by the New Energy and Industrial Technology Development Organization (NEDO).

K Umemoto; K Aizawa; M Yokoyama; K Yoshikawa; Y Kimura; M Izumi; K Ohashi; M Numano; K Okumura; M Yamaguchi; Y Gocho; E Kosuge

2010-01-01T23:59:59.000Z

74

Abstract--A fish-like propulsion system seems to be an interesting and efficient alternative to propellers in small  

E-Print Network (OSTI)

1 Abstract--A fish-like propulsion system seems to be an interesting and efficient alternative. Finally there is a description of the control system implementation for the tail's motion. Index terms--Fish propulsion, underwater robot, fish design. I. INTRODUCTION LTHOUGH almost all marine vehicles use propellers

Papadopoulos, Evangelos

75

Problems in developing bimodal space power and propulsion system fuel element  

SciTech Connect

The paper discusses design of a space nuclear power and propulsion system fuel element (PPFE) developed on the basis of an enhanced single-cell thermionic fuel element (TFE) of the 'TOPAZ-2' thermionic converter-reactor (TCR), and presents the PPFE performance for propulsion and power modes of operation. The choice of UC-TaC fuel composition is substantiated. Data on hydrogen effect on the PPFE output voltage are presented, design solutions are considered that allow to restrict hydrogen supply to an interelectrode gap (IEG). Long-term geometric stability of an emitter assembly is supported by calculated data.

Nikolaev, Yu. V.; Gontar, A. S.; Zaznoba, V. A.; Parshin, N. Ya.; Ponomarev-Stepnoi, N. N.; Usov, V. A. [Research Institute of SIA 'Lutch' Podolsk, Moscow Region, 142100 (Russian Federation); RRC 'Kurchatov Institute' Moscow, 123182 (Russian Federation)

1997-01-10T23:59:59.000Z

76

Anti-Spin Control for Marine Propulsion Systems yvind N. Smogeli1, Jostein Hansen2, Asgeir J. Srensen1 and Tor Arne Johansen2  

E-Print Network (OSTI)

Anti-Spin Control for Marine Propulsion Systems ?yvind N. Smogeli1, Jostein Hansen2, Asgeir J. Sørensen1 and Tor Arne Johansen2 Abstract-- An anti-spin controller for marine propulsion systems in rough the transients in the power system and reduce the mechanical wear and tear of the propulsion system components

Johansen, Tor Arne

77

An Integrated Marine Propulsion System Utilising TRIGA{sup TM} Fuel  

SciTech Connect

This paper describes the reactor physics, shielding, thermal hydraulics, reactor dynamics and safety studies conducted to develop a proposed Integrated Marine Propulsion System (IMPS) utilising TRIGA{sup TM} type uranium zirconium hydride fuel. The study has demonstrated that the IMPS plant is feasible and meets the design safety principles and safety criteria imposed on the study. (authors)

Manach, G.; Monnez, J-P. [Ecole des Applications Militaires de l'Energie Atomique, Cherbourg (France); Freeman, M.J.; Newell, A.; Brushwood, J.M.; Thompson, A.; Collins, C.; Scholes, N.; Hamilton, P.J.; Beeley, P.A. [Nuclear Department/ Flagship Training Ltd, HMS Sultan, Military Road, Gosport, PO12 3BY (United Kingdom)

2004-07-01T23:59:59.000Z

78

Electric Motor Drive Selection Issues for HEV Propulsion Systems: A Comparative Study  

E-Print Network (OSTI)

Electric Motor Drive Selection Issues for HEV Propulsion Systems: A Comparative Study M. Zeraoulia1 Combustion Engine (ICE) and the electric motor to deliver power in parallel to drive the wheels. Since both the ICE and electric motor are generally coupled to the drive shaft of the wheels via two clutches

Paris-Sud XI, Université de

79

Control of a Linear Switched Reluctance Motor as a Propulsion System for Autonomous Railway Vehicles  

E-Print Network (OSTI)

Control of a Linear Switched Reluctance Motor as a Propulsion System for Autonomous Railway) and the linear switched reluctance motor (LSRM). Switched reluctance motors generally offer a very simple issue with the switched reluctance motors is the highly nonlinear magnetisation characteristic

Paderborn, Universität

80

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

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

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

82

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

83

Techno-economic and environmental risk analysis for advanced marine propulsion systems  

Science Journals Connector (OSTI)

A Techno-economic, Environmental and Risk Analysis (TERA) computational method has been developed for marine propulsion systems. The method comprises several numerical models which simulate the life cycle operation of marine gas turbines installed on marine vessels. Using a system-of-systems approach, the effect of operational profile can be taken into consideration in the assessment of a novel prime mover. Stochastic estimates of the powerplants life cycle net present cost are generated. The ship performance model plays a central role in the TERA method. This is an integrated virtual marine vessel operating environment that allows the calculation of engine performance and exhaust emissions (nitric oxide (NOx), carbon monoxide CO, carbon dioxide (CO2) and unburned hydrocarbon (UHC)) for a given trip. The life of the gas turbine is assessed through a creep-life prediction method, which plays a significant role on the maintenance cost calculation in the economic model. The economic model predicts net present cost over the operating life of the vessel using stochastic analysis of the earning capacity of the ship powered by the chosen prime mover. The TERA simulation of a 25MW marine gas turbine powering a RoPax fast ferry in an integrated full electric propulsion system is presented as an illustration of the method. The example includes aspects of the systemic analysis of engine and ship performance, accompanied by environmental effect and engine life prediction, coupled with an economic feasibility stochastic study of the selected propulsion system under several journey and economic scenarios.

G. Doulgeris; T. Korakianitis; P. Pilidis; E. Tsoudis

2012-01-01T23:59:59.000Z

84

Hybrid Membrane System for Industrial Water Reuse  

Energy.gov (U.S. Department of Energy (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.

85

Heavy vehicle propulsion system materials program semiannual progress report for April 1999 through September 1999  

SciTech Connect

The purpose of the Heavy Vehicle Propulsion System Materials Program is the development of materials: ceramics, intermetallics, metal alloys, and metal and ceramic coatings, to support the dieselization of class 1-3 trucks to realize a 35% fuel-economy improvement over current gasoline-fueled trucks and to support commercialization of fuel-flexible LE-55 low-emissions, high-efficiency diesel engines for class 7-8 trucks.

Johnson, D.R.

2000-01-01T23:59:59.000Z

86

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

87

Mission analysis for hybrid thermionic nuclear reactor LEO-to-GEO transfer applications  

SciTech Connect

This paper details the results of mission analyses concerning a hybrid STAR-C based system, which is based on a safe solid fuel form for high-temperature reactor core operation and a rugged planar thermionic energy converter for long-life steady-state electric power production. Hybrid power/propulsion system concepts are shown to offer superior performance capabilities for Low-Earth-Orbit (LEO) to Geosynchronous-Earth-Orbit (GEO) orbital transfer applications over chemical propulsion systems. A key feature of the hybrid power/propulsion system is that the propulsion system uses the on-board payload power system. Mission results for hybrid concepts using Nuclear Thermal Propulsion (NTP), Nuclear Electric Propulsion (NEP), and combination of NTP and NEP are discussed.

Widman, F.W. Jr.; North, D.M. (Rockwell International/Rocketdyne Division, 6633 Canoga Avenue, Canoga Park, California 91303 (United States)); Choong, P.T.; Teofilo, V.L. (Lockheed Missiles and Space Company, Inc., 1111 Lockheed Way, Synnyvale, California 94088 (United States))

1993-01-10T23:59:59.000Z

88

Looking From A Hilltop: Automotive Propulsion System Technology...  

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

Advanced Engine Trends, Challenges and Opportunities Diesel Emission Control Review Catalyst Design for Urea-less Passive Ammonia SCR Lean-Burn SIDI Aftertreatment System...

89

A Design of Marine Propulsion Shaft Power Telemetry System  

Science Journals Connector (OSTI)

In order to achieve the marine shaft powers dynamic telemetry, on the basis of the analysis of shaft power measurements fundamental principles, from both hardware and software, the telemetry system has desig...

Hongyan Hao; Qingshan Ji

2012-01-01T23:59:59.000Z

90

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.

91

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

92

Vehicle Technologies Office: Hybrid and Vehicle Systems  

Energy.gov (U.S. Department of Energy (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)...

93

Twelve-Month Evaluation of UPS Diesel Hybrid Electric Delivery Vans  

SciTech Connect

Results of an NREL study of a parallel hybrid electric-diesel propulsion system in United Parcel Service-operated delivery vans show that the hybrids had higher fuel economy than standard diesel vans.

Lammert, M.

2009-12-01T23:59:59.000Z

94

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

95

Comparative controller design for a marine gas turbine propulsion system  

SciTech Connect

Controller design for marine gas turbine systems should consider three measures of performance: transient control, steady-state accuracy, and disturbance rejection. This paper presents and compares two common types of controller design in terms of these measures. The goal of the controllers was shaft speed control. To meet this goal, a classical proportional-plus-integral controller was designed and compared to a modern linear quadratic regulator design. The controllers' performances were evaluated with respect to the three measures mentioned above, with disturbances being input as oscillations in shaft torque due to seaway cycling.

Smith, D.L.; Stammetti, V.A. (Naval Postgraduate School, Monterey, CA (USA). Dept. of Mechanical Engineering)

1990-04-01T23:59:59.000Z

96

Hypersonic MHD Propulsion System Integration for the Mercury Lightcraft  

SciTech Connect

Introduced herein are the design, systems integration, and performance analysis of an exotic magnetohydrodynamic (MHD) slipstream accelerator engine for a single-occupant 'Mercury' lightcraft. This ultra-energetic, laser-boosted vehicle is designed to ride a 'tractor beam' into space, transmitted from a future orbital network of satellite solar power stations. The lightcraft's airbreathing combined-cycle engine employs a rotary pulsed detonation thruster mode for lift-off and landing, and an MHD slipstream accelerator mode at hypersonic speeds. The latter engine transforms the transatmospheric acceleration path into a virtual electromagnetic 'mass-driver' channel; the hypersonic momentum exchange process (with the atmosphere) enables engine specific impulses in the range of 6000 to 16,000 seconds, and propellant mass fractions as low as 10%. The single-stage-to-orbit, highly reusable lightcraft can accelerate at 3 Gs into low Earth orbit with its throttle just barely beyond 'idle' power, or virtually 'disappear' at 30 G's and beyond. The objective of this advanced lightcraft design is to lay the technological foundations for a safe, very low cost (e.g., 1000X below chemical rockets) air and space transportation for human life in the mid-21st Century - a system that will be completely 'green' and independent of Earth's limited fossil fuel reserves.

Myrabo, L.N. [Mechanical, Aerospace, and Nuclear Engineering Dept., Rensselaer Polytechnic Institute, Troy, NY (United States); Rosa, R.J. [Department of Mechanical Engineering, Montana State University, Bozeman, MT (United States)

2004-03-30T23:59:59.000Z

97

Induction-drive magnetohydrodynamic propulsion  

Science Journals Connector (OSTI)

The use of magnetohydrodynamic propulsion for marine applications is reviewed with emphasis on induction- ... . Comparisons are made with direct-drive MHD propulsion systems. Application to pumps for hazardous fl...

D. L. Mitchell; D. U. Gubser

1993-08-01T23:59:59.000Z

98

Integrated Modular Propulsion and Regenerative Electro-energy Storage System (IMPRESS) for small satellites  

SciTech Connect

The IMPRESS is a significant advancement in space system technology as it is able to operate alternately as a fuel cell to produce electrical power from stored hydrogen and oxygen and as a water electrolyzer using electrical power to produce hydrogen and oxygen from stored water. The electrolysis of a controllable fraction of stored water can provide high Isp rocket propellants on demand. The heart of the IMPRESS is the Unitized Regenerative Fuel Cell (URFC), which produces power and electrolytically regenerates its reactants using a single stack of reversible cells. This integrated approach has several significant advantages over separate (battery) power and propulsion systems.

Mitlitsky, F. [Lawrence Livermore National Lab., CA (United States); de Groot, W. [Nyma, Inc., Brook Park, OH (United States); Butler, L.; McElroy, J. [United Technologies Corp., Windsor Locks, CT (United States). Hamilton Standard Div.

1996-09-01T23:59:59.000Z

99

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

100

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...

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

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...

102

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...

103

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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...

104

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...

105

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...

106

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

107

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

108

System for propulsion of boats by means of winds and streams and for recovery of energy  

SciTech Connect

The invention relates to an improved system for propulsion of boats by winds and streams and for recovery of disposable energy from floating stations neither moored nor anchored, the improved system comprising: at least one aerial feathered propeller with its shaft, the propeller being mounted orientable in any azimuth direction contained in a substantially horizontal plane and adapted to function as an aerogenerator as well as a propulsive screw; a superstructure supporting device on the floating unit adapted to permit orientation as desired of the aerial propeller in the direction of the wind; at least one nautic propeller screw with its shaft, mounted under the bottom of the floating unit and adapted to be capable of functioning as energy collecting turbine as well as propeller; a transmission system connecting the aerial propeller shaft to the nautic propeller shaft, the transmission being reversible and capable of including a torque conversion device to select during operations the direction of transmission as well as the transmission ratio; a directional device adapted to ensure the steering of the floating unit; and control devices comprising actuating apparatus adapted to allow the driver to act, in addition upon the directional device and the azimuth orientation of said aerial propeller, upon at least two of three variable parameters of said system, namely the pitch of said aerial propeller, the transmission ratio and the pitch of said nautic propeller, by the actuating apparatus.

Vidal, J.

1983-02-01T23:59:59.000Z

109

New Opportunities for Outer Solar System Science using Radioisotope Electric Propulsion  

SciTech Connect

Today, our questions and hypotheses about the Solar System's origin have surpassed our ability to deliver scientific instruments to deep space. The moons of the outer planets, the Trojan and Centaur minor planets, the trans-Neptunian objects (TNO), and distant Kuiper Belt objects (KBO) hold a wealth of information about the primordial conditions that led to the formation of our Solar System. Robotic missions to these objects are needed to make the discoveries, but the lack of deep-space propulsion is impeding this science. Radioisotope electric propulsion (REP) will revolutionize the way we do deep-space planetary science with robotic vehicles, giving them unprecedented mobility. Radioisotope electric generators and lightweight ion thrusters are being developed today which will make possible REP systems with specific power in the range of 5 to 10 W/kg. Studies have shown that this specific power range is sufficient to perform fast rendezvous missions from Earth to the outer Solar System and fast sample return missions. This whitepaper discusses how mobility provided by REP opens up entirely new science opportunities for robotic missions to distant primitive bodies. We also give an overview of REP technology developments and the required next steps to realize REP.

Noble, Robert J.; /SLAC; Amini, Rashied; Beauchamp, Patricia M.; /Caltech, JPL; Bennett, Gary L.; /Metaspace Enterprises; Brophy, John R.; Buratti, Bonnie J.; Ervin, Joan; /Caltech, JPL; Fernandez, Yan R.; /Central Florida U.; Grundy, Will; /Lowell Observ.; Khan, Mohammed Omair; /Caltech, JPL; King, David Q.; /Aerojet; Lang, Jared; /Caltech, JPL; Meech, Karen J.; /Hawaii U.; Newhouse, Alan; Oleson, Steven R.; Schmidt, George R.; /GRC; Spilker, Thomas; West, John L.; /Caltech, JPL; ,

2010-05-26T23:59:59.000Z

110

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":""}]}

111

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.

112

Heavy vehicle propulsion system materials program semiannual progress report for April 1998 thru September 1998  

SciTech Connect

The purpose of the Heavy Vehicle Propulsion System Materials Program is the development of materials: ceramics, intermetallics, metal alloys, and metal and ceramic coatings, to support the dieselization of class 1--3 trucks to realize a 35{percent} fuel-economy improvement over current gasoline-fueled trucks and to support commercialization of fuel-flexible LE-55 low-emissions, high-efficiency diesel engines for class 7--8 trucks. The Office of Transportation Technologies, Office of Heavy Vehicle Technologies (OTT OHVT) has an active program to develop the technology for advanced LE-55 diesel engines with 55{percent} efficiency and low emissions levels of 2.0 g/bhp-h NO{sub x} and 0.05 g/bhp-h particulates. The goal is also for the LE-55 engine to run on natural gas with efficiency approaching that of diesel fuel. The LE-55 program is being completed in FY 1997 and, after approximately 10 years of effort, has largely met the program goals of 55{percent} efficiency and low emissions. However, the commercialization of the LE-55 technology requires more durable materials than those that have been used to demonstrate the goals. Heavy Vehicle Propulsion System Materials will, in concert with the heavy-duty diesel engine companies, develop the durable materials required to commercialize the LE-55 technologies.

Johnson, D.R.

1999-01-01T23:59:59.000Z

113

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

114

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

115

Hybrid Braking System for Non-Drive Axles  

Energy.gov (U.S. Department of Energy (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.

116

Efficiency of Fish Propulsion  

E-Print Network (OSTI)

It is shown that the system efficiency of a self-propelled flexible body is ill-defined unless one considers the concept of quasi-propulsive efficiency, defined as the ratio of the power needed to tow a body in rigid-straight condition over the power it needs for self-propulsion, both measured for the same speed. Through examples we show that the quasi-propulsive efficiency is the only rational non-dimensional metric of the propulsive fitness of fish and fish-like mechanisms. Using two-dimensional viscous simulations and the concept of quasi-propulsive efficiency, we discuss the efficiency two-dimensional undulating foils. We show that low efficiencies, due to adverse body-propulsor hydrodynamic interactions, cannot be accounted for by the increase in friction drag.

Maertens, A P; Yue, D K P

2014-01-01T23:59:59.000Z

117

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

118

Marine propulsion device with engine heat recovery system and streamlining hull closures  

SciTech Connect

A Marine Jet Propulsion System for use as an inboard engine for boats is herein described. An engine or motor means is attached in a driving relationship to a pump and thrust output apparatus. Heat generated by and rejected by the engine or motor is passed into the pump base for dissipation into the outputted jet thrust stream. Air and/or exhaust gas from the engine is ejected around the jet output stream to reduce against-the-hull turbulence and jet stream or thrust energy losses. Streamlining hull closures for the jet pump intake and output ports are provided to reduce system hull drag when not in use and to limit marine organism growth inside the pump.

Haynes, H. W.

1985-11-12T23:59:59.000Z

119

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

120

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

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

Modeling and Simulation of a Hybrid Electric Vessel.  

E-Print Network (OSTI)

??A proposed hybrid electric marine vehicle was modeled in MATLAB Simulink and SimPowerSystems. Models for each of the individual propulsion components were developed and incorporated (more)

Jaster, Tiffany

2014-01-01T23:59:59.000Z

122

DOE Scientist Earns Chairman's Award from Propulsion and Power...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Scientist Earns Chairman's Award from Propulsion and Power Systems Alliance DOE Scientist Earns Chairman's Award from Propulsion and Power Systems Alliance October 2, 2009 - 1:00pm...

123

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

124

Hybrid Energy System Modeling in Modelica  

SciTech Connect

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

125

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

126

Analysis of hybrid solar systems  

SciTech Connect

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

127

Multiple pole electromagnetic propulsion system with separated ballistic guidance and electrical current contact surfaces  

DOE Patents (OSTI)

An electromagnetic propulsion system is disclosed having separate rails for ballistic guidance and for carrying current. In this system, one or more pairs of ballistic guidance rails are provided, with each ballistic guidance rail having a pair of current carrying rails joined to it to form a combined rail. Each combined rail is separated electrically from adjacent combined rails by electrically insulating blocks. Each of the current carrying rails in a given combined rail pair have the same electrical polarity, and the polarities alternate between adjacent combined rails. Armatures contact current carrying rails to complete the circuit to generate the accelerating Lorentz force on the armatures. Bore riders on the sabot and/or projectile are in contact with the ballistic guide rails. Separation of the current carrying and ballistic guidance functions increases resistance of the system to rail movement and bending, as well as reduced wear/damage to the rails. In further embodiments, a circumferential over wrap providing compressive force on the rails further increases resistance of the system to rail movement and bending.

Sims, Jr., James R. (Los Alamos, NM)

2008-07-15T23:59:59.000Z

128

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.

129

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.

130

Hybrid Wind and Solar Electric Systems | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

131

Heavy Vehicle Propulsion System Materials Program Semiannual Progress Report for October 1998 Through March 1999  

SciTech Connect

The purpose of the Heavy Vehicle Propulsion System Materials Program is the development of materials: ceramics, intermetallics, metal alloys, and metal and ceramic coatings, to support the dieselization of class 1-3 trucks to realize a 35% fuel-economy improvement over current gasoline-fueled trucks and to support commercialization of fuel-flexible LE-55 low-emissions, high-efficiency diesel engines for class 7-8 trucks. The Office of Transportation Technologies, Office of Heavy Vehicle Technologies (OIT OHVT) has an active program to develop the technology for advanced LE-55 diesel engines with 55% efficiency and low emissions levels of 2.0 g/bhp-h NOX and 0.05 g/bhp-h particulate. The goal is also for the LE-55 engine to run on natural gas with efficiency approaching that of diesel fuel. The LE-55 program is being completed in FY 1997 and, after approximately 10 years of effort, has largely met the program goals of 55% efficiency and low emissions. However, the commercialization of the LE-55 technology requires more durable materials than those that have been used to demonstrate the goals. Heavy Vehicle Propulsion System Materials will, in concert with the heavy duty diesel engine companies, develop the durable materials required to commercialize the LE-55 technologies. OIT OHVT also recognizes a significant opportunity for reduction in petroleum consumption by dieselization of pickup trucks, vans, and sport utility vehicles. Application of the diesel engine to class 1,2, and 3 trucks is expected to yield a 35% increase in fuel economy per vehicle. The foremost barrier to diesel use in this market is emission control. Once an engine is made certifiable, subsequent challenges will be in cost; noise, vibration, and harshness (NVH); and performance. The design of advanced components for high-efficiency diesel engines has, in some cases, pushed the performance envelope for materials of construction past the point of reliable operation. Higher mechanical and tribological stresses and higher temperatures of advanced designs limit the engine designer; advanced materials allow the design of components that may operate reliably at higher stresses and temperatures, thus enabling more efficient engine designs. Advanced materials also offer the opportunity to improve the emissions, NVH, and performance of diesel engines for pickup trucks, vans, and sport utility vehicles. The principal areas of research are: (1) Cost Effective High Performance Materials and Processing; (2) Advanced Manufacturing Technology; (3)Testing and Characterization; and (4) Materials and Testing Standards.

Johnson, R.D.

1999-06-01T23:59:59.000Z

132

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

133

Design of isolated renewable hybrid power systems  

SciTech Connect

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

134

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

135

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

136

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

137

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

138

Apparatus and method for providing oil circulation in a marine propulsion system  

SciTech Connect

A marine propulsion system is described, comprising: a housing including an upper cavity and a lower cavity defined at least in part by an end wall; an upper input shaft adapted to be rotatably driven by an engine and being disposed within the housing upper cavity; an input drive member mounted to the input shaft; a lower propeller shaft disposed within the housing lower cavity; a driven member mounted to the propeller shaft and located within the housing lower cavity so as to be axially spaced from the lower cavity end wall to define a space there between; drive means disposed between the drive member and the driven member and imparting rotation to the propeller shaft in response to rotation of the input shaft; a quantity of lubricant provided in the housing; a lubricant supply passage providing communication between the lower cavity and the input shaft cavity, and including an inlet in the housing lower cavity opening into the space located between the lower cavity end wall and the driven member, so that rotation of the driven member supplies lubricant under pressure to the space and to the inlet of the supply passage, with the lubricant flowing there through to the input shaft cavity; and a return passage communicating between the input shaft cavity and the lower cavity for providing return flow of lubricant from the input shaft cavity to the lower cavity.

Schueller, N.M.; Meisenburg, G.L.; Gray, C.F. Jr.

1993-08-17T23:59:59.000Z

139

Heavy Vehicle Propulsion System Materials Program semiannual progress report for October 1996 through March 1997  

SciTech Connect

The purpose of the Heavy Vehicle Propulsion System Materials Program is the development of materials: ceramics, intermetallics, metal alloys, and metal and ceramic coatings, to support the dieselization of class 1-3 trucks to realize a 35% fuel-economy improvement over current gasoline-fueled trucks and to support commercialization of fuel-flexible LE-55 low-emissions, high-efficiency diesel engines for class 7-8 trucks. The design of advanced components for high-efficiency diesel engines has, in some cases, pushed the performance envelope for materials of construction past the point of reliable operation. Higher mechanical and tribological stresses and higher temperatures of advanced designs limit the engine designers; advanced materials allow the design of components that may operate reliably at higher stresses and temperatures, thus enabling more efficient engine designs. Advanced materials also offer the opportunity to improve the emissions, NVH, and performance of diesel engines for pickup trucks, vans, and sport utility vehicles. The principal areas of research are: (1) cost effective high performance materials and processing; (2) advanced manufacturing technology; (3) testing and characterization; and (4) materials and testing standards.

NONE

1997-07-01T23:59:59.000Z

140

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

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

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

142

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

143

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

144

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

145

Electric Propulsion  

Science Journals Connector (OSTI)

...is clear. The long-t?me continuous operation is required for electric propulsion pri-marily...travel against a small voltage to the cold element. The cell thereby produces an...concentrate and focus the solar rays on a heater. Little, if any, decrease in specific...

W. E. Moeckel

1963-10-11T23:59:59.000Z

146

Operations of a Radioisotope-based Propulsion System Enabling CubeSat Exploration of the Outer Planets  

SciTech Connect

Exploration to the outer planets is an ongoing endeavor but in the current economical environment, cost reduction is the forefront of all concern. The success of small satellites such as CubeSats launched to Near-Earth Orbit has lead to examine their potential use to achieve cheaper science for deep space applications. However, to achieve lower cost missions; hardware, launch and operations costs must be minimized. Additionally, as we push towards smaller exploration beds with relative limited power sources, allowing for adequate communication back to Earth is imperative. Researchers at the Center for Space Nuclear Research are developing the potential of utilizing an advanced, radioisotope-based system. This system will be capable of providing both the propulsion power needed to reach the destination and the additional requirements needed to maintain communication while at location. Presented here are a basic trajectory analysis, communication link budget and concept of operations of a dual-mode (thermal and electric) radioisotope-based propulsion system, for a proposed mission to Enceladus (Saturnian icy moon) using a 6U CubeSat payload. The radioisotope system being proposed will be the integration of three sub-systems working together to achieve the overall mission. At the core of the system, stored thermal energy from radioisotope decay is transferred to a passing propellant to achieve high thrust useful for quick orbital maneuvering. An auxiliary closed-loop Brayton cycle can be operated in parallel to the thrusting mode to provide short bursts of high power for high data-rate communications back to Earth. Additionally, a thermal photovoltaic (TPV) energy conversion system will use radiation heat losses from the core. This in turn can provide the electrical energy needed to utilize the efficiency of ion propulsion to achieve quick interplanetary transit times. The intelligent operation to handle all functions of this system under optimized conditions adds to the complexity of the mission architecture.

Dr. Steven Howe; Nathan Jerred; Troy Howe; Adarsh Rajguru

2014-05-01T23:59:59.000Z

147

NREL: Fleet Test and Evaluation - Hybrid Electric Drive Systems  

NLE Websites -- All DOE Office Websites (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

148

A new symbiotic evolution-based fuzzy-neural approach to fault diagnosis of marine propulsion systems  

Science Journals Connector (OSTI)

This paper presents a symbiotic evolution-based fuzzy-neural diagnostic system (SE-FNDS) for fault diagnosis of propellershaft marine propulsion systems. The SE-FNDS combination of fuzzy modeling, back-propagation training and symbiotic evolution function auto-generates its own optimal fuzzy-neural architecture, a significant advantage over previous time-consuming manual parameter determination. Four hundred samples from a test propellershaft system are taken over a range of 100500rpm, during normal and experimentally induced faulty operation. This database is applied as input/output rule generation and training data for the fuzzy-neural network. Comparison of system construction time and diagnostic accuracy is made by applying the same database to SE-FNDS and four traditional systems. Compared to traditional methods, diagnostic decisions from SE-FNDS show 94.17% agreement with real conditions and less CPU time for system construction. Two nonlinear function approximations are also used to demonstrate the proposed system. The presented design is useful as a core module for more advanced computer-assisted diagnostic systems and for direct application in marine propulsion systems.

Hsing-Chia Kuo; Hui-Kuo Chang

2004-01-01T23:59:59.000Z

149

Nuclear Hybrid Energy Systems: Challenges and Opportunities  

SciTech Connect

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

150

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

151

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

152

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...

153

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

NLE Websites -- All DOE Office Websites (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...

154

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

155

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

156

RADIOISOTOPE-DRIVEN DUAL-MODE PROPULSION SYSTEM FOR CUBESAT-SCALE PAYLOADS TO THE OUTER PLANETS  

SciTech Connect

It is apparent the cost of planetary exploration is rising as mission budgets declining. Currently small scientific beds geared to performing limited tasks are being developed and launched into low earth orbit (LEO) in the form of small-scale satellite units, i.e., CubeSats. These micro- and nano-satellites are gaining popularity among the university and science communities due to their relatively low cost and design flexibility. To date these small units have been limited to performing tasks in LEO utilizing solar-based power. If a reasonable propulsion system could be developed, these CubeSat platforms could perform exploration of various extra-terrestrial bodies within the solar system engaging a broader range of researchers. Additionally, being mindful of mass, smaller cheaper launch vehicles (approximately 1,000 kgs to LEO) can be targeted. Thus, in effect, allows for beneficial exploration to be conducted within limited budgets. Researchers at the Center for Space Nuclear Research (CSNR) are proposing a low mass, radioisotope-based, dual-mode propulsion system capable of extending the exploration realm of these CubeSats out of LEO.

N. D. Jerred; T. M. Howe; S. D. Howe; A. Rajguru

2014-02-01T23:59:59.000Z

157

NREL: Fleet Test and Evaluation - Hydraulic Hybrid Drive Systems  

NLE Websites -- All DOE Office Websites (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

158

Radioisotope electric propulsion for robotic science missions to near-interstellar space  

SciTech Connect

The use of radioisotope electric propulsion for sending small robotic probes on fast science missions several hundred astronomical units (AU) from the Sun is investigated. Such missions would address a large variety of solar, interstellar, galactic and cosmological science themes from unique vantage points at 100 to 600 AU, including parallax distance measurements for the entire Milky Way Galaxy, sampling of the interstellar medium and imaging of cosmological objects at the gravitational lens foci of the Sun ({ge} 550 AU). Radioisotope electric propulsion (REP) systems are low-thrust, ion propulsion units based on multi-hundred watt, radioisotope electric generators and ion thrusters. In a previous work, the flight times for rendezvous missions to the outer planets (< 30 AU) using REP were found to be less than fifteen years. However fast prestellar missions to several hundred AU are not possible unless the probe`s energy can be substantially increased in the inner Solar System so as to boost the final hyperbolic excess velocity. In this paper an economical hybrid propulsion scheme combining chemical propulsion and gravity assist in the inner Solar System and radioisotope electric propulsion in the outer Solar System is studied which enables fast prestellar missions. Total hyperbolic excess velocities of 15 AU/year and flight times to 550 AU of about 40 years are possible using REP technology that may be available in the next decade.

Noble, R.J.

1994-10-01T23:59:59.000Z

159

PV-hybrid village power systems in Amazonia  

SciTech Connect

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

160

Heavy vehicle propulsion system materials program semi-annual progress report for October 1997 through March 1998  

SciTech Connect

The purpose of the Heavy Vehicle Propulsion System materials Program is the development of materials: ceramics, intermetallics, metal alloys, and metal and ceramic coatings, to support the dieselization of class 1--3 trucks to realize a 35{percent} fuel-economy improvement over current gasoline-fueled trucks and to support commercialization of fuel-flexible LE-55 low-emissions, high-efficiency diesel engines for class 7--8 trucks. The Office of Transportation Technologies, Office of Heavy Vehicle Technologies (OTT OHVT) has an active program to develop the technology for advanced LE-55 diesel engines with 55{percent} efficiency and low emissions levels of 2.0 g/bhp-h NO{sub x} and 0.05 g/bhp-h particulates. The goal is also for the LE-55 engine to run on natural gas with efficiency approaching that of diesel fuel. The LE-55 program is being completed in FY 1997 and, after approximately 10 years of effort, has largely met the program goals of 55{percent} efficiency and low emissions. However, the commercialization of the LE-55 technology requires more durable materials than those that have been used to demonstrate the goals. Heavy Vehicle Propulsion System Materials will, in concert with the heavy-duty diesel engine companies, develop the durable materials required to commercialize the LE-55 technologies.

Johnson, D.R.

1998-06-01T23:59:59.000Z

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

Fission Thrust sail as booster for high {\\Delta}v fusion based propulsion  

E-Print Network (OSTI)

The fission thrust sail as booster for nuclear fusion-based rocket propulsion for future starships is studied. Some required aspects of these systems such as neutron moderation and sail regeneration are discussed. First order calculations are used together with Monte Carlo simulations to assess system performance. When the fusion rocket has relatively low efficiency (~30%) in converting fusion fuel to a directed exhaust, adding a fission sail is shown to be beneficial for obtainable delta-v. Also, this type of fission-fusion hybrid interstellar propulsion has the potential to improve acceleration. Other advantages are discussed as well.

Ceyssens, Frederik; Driesen, Maarten

2014-01-01T23:59:59.000Z

162

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...

163

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

NLE Websites -- All DOE Office Websites (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....

164

High performance path following for marine vehicles using azimuthing podded propulsion .  

E-Print Network (OSTI)

??Podded propulsion systems offer greater maneuvering possibilities for marine vehicles than conventional shaft and rudder systems. As the propulsion unit rotates about its vertical axis (more)

Greytak, Matthew B. (Matthew Bardeen)

2006-01-01T23:59:59.000Z

165

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

166

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

167

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

SciTech Connect

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

168

How A Vessel of This Magnitude Was Moved : A Comparative Analysis of Confederate Ironclad Steam Engines Boilers and Propulsion Systems.  

E-Print Network (OSTI)

??The development of steam propulsion machinery in warships during the 19th century in conjunction with iron armor and shell guns resulted in a technological revolution (more)

Bisbee, Saxon T.

2012-01-01T23:59:59.000Z

169

Large eddy simulation modelling of combustion for propulsion applications  

Science Journals Connector (OSTI)

...but also for power generation and for marine applications. The current trend is to...travel are the vehicle design and the propulsion system, and how to integrate them. Two types of propulsion systems, ramjets (Fry 2004) and scramjets...

2009-01-01T23:59:59.000Z

170

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

SciTech Connect

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

171

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

NLE Websites -- All DOE Office Websites (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...

172

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

173

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

174

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

175

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

176

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

177

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

178

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

179

Utilization of a hybrid membrane system in olefin production  

SciTech Connect

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

180

DUAL-MODE PROPULSION SYSTEM ENABLING CUBESAT EXPLORATION OF THE SOLAR SYSTEM NASA Innovative Advanced Concepts (NIAC) Phase I Final Report  

SciTech Connect

It is apparent the cost of planetary exploration is rising as mission budgets declining. Currently small scientific beds geared to performing limited tasks are being developed and launched into low earth orbit (LEO) in the form of small-scale satellite units, i.e., CubeSats. These micro- and nano-satellites are gaining popularity among the university and science communities due to their relatively low cost and design flexibility. To date these small units have been limited to performing tasks in LEO utilizing solar-based power. If a reasonable propulsion system could be developed, these CubeSat platforms could perform exploration of various extra-terrestrial bodies within the solar system engaging a broader range of researchers. Additionally, being mindful of mass, smaller cheaper launch vehicles (~1,000 kgs to LEO) can be targeted. This, in effect, allows for beneficial explora-tion to be conducted within limited budgets. Researchers at the Center for Space Nuclear Re-search (CSNR) are proposing a low mass, radioisotope-based, dual-mode propulsion system capable of extending the exploration realm of these CubeSats out of LEO. The proposed radioisotope-based system would leverage the high specific energies [J/kg] associated with radioisotope materials and enhance their inherent low specific powers [W/g]. This is accomplished by accumulating thermal energy from nuclear decay within a central core over time. This allows for significant amounts of power to be transferred to a flowing gas over short periods of time. In the proposed configuration the stored energy can be utilized in two ways: (1) with direct propellant injection to the core, the energy can be converted into thrust through the use of a converging-diverging nozzle and (2) by flowing a working fluid through the core and subsequent Brayton engine, energy within the core can be converted to electrical energy. The first scenario achieves moderate ranges of thrust, but at a higher Isp than traditional chemical-based systems. The second scenario allows for the production of electrical power, which is then available for electric-based propulsion. Additionally, once at location the production of electrical power can be dedicated to the payloads communication system for data transfer. Ultimately, the proposed dual-mode propulsion platform capitalizes on the benefits of two types of propulsion methods the thrust of thermal propulsion ideal for quick orbital maneuvers and the specific impulse of electric propulsion ideal for efficient inter-planetary travel. Previous versions of this RTR-based concept have been studied for various applications [NETS 1-3]. The current version of this concept is being matured through a NASA Innovative Advanced Concepts (NIAC) Phase I grant, awarded for FY 2014. In this study the RTR concept is being developed to deliver a 6U CubeSat payload to the orbit of the Saturnian moon - Enceladus. Additionally, this study will develop an entire mission architecture for Enceladus targeting a total allowable launch mass of 1,000 kg.

Nathan Jerred; Troy Howe; Adarsh Rajguru; Dr. Steven Howe

2014-06-01T23:59:59.000Z

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

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

NLE Websites -- All DOE Office Websites (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

182

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

183

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.

184

Analysis of advanced solar hybrid desiccant cooling systems for buildings  

SciTech Connect

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

185

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

186

Wind Turbines for Marine Propulsion  

Science Journals Connector (OSTI)

ABSTRACT The design and construction of an horizontal axis wind turbine drive for a small yacht is described. This system has been designed to test the performance of this novel type of propulsion for use in commercial shipping, the fisheries industry and for the recreational market. The use of wind turbines to harness the power available from the wind for propulsion purposes offers a number of distinct advantages over other wind propulsion systems. Propulsion is achieved in all directions of travel relative to the wind. Complete control of the system can be arranged from a remote control position such as the ships bridge. This control can be achieved with a small crew because of the opportunities for applying powered and automated control systems. The way in which each of these features is achieved, together with details of the rotor, shafting and gear-train arrangements are described here. An indication is given of the theoretical performance of the yacht under this form of propulsion.

N. Bose; R.C. McGregor

1984-01-01T23:59:59.000Z

187

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

188

Power balance in a helicon plasma source for space propulsion  

E-Print Network (OSTI)

Electric propulsion systems provide an attractive option for various spacecraft propulsion applications due to their high specific impulse. The power balance of an electric thruster based on a helicon plasma source is ...

White, Daniel B., Jr

2008-01-01T23:59:59.000Z

189

Hybrid energy system cost analysis: San Nicolas Island, California  

SciTech Connect

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

190

Solid Oxide Fuel Cell Hybrid System for Distributed Power Generation  

SciTech Connect

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

191

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

192

Entanglement detection in hybrid optomechanical systems  

SciTech Connect

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

193

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

194

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

195

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

196

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

197

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

198

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.

199

Electron-State Hybridization in Heavy-Fermion Systems  

NLE Websites -- All DOE Office Websites (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.

200

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

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

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

202

Hybrid approach to failure prediction for advanced computing systems |  

NLE Websites -- All DOE Office Websites (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,

203

Hybrid sodium heat pipe receivers for dish/Stirling systems  

SciTech Connect

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

204

PROPULSION AND ENERGY Terrestrial energy  

E-Print Network (OSTI)

PROPULSION AND ENERGY Terrestrial energy On the morning of Monday, August 29, Hurri- cane Katrina dependence we all have on power and energy systems. Nine major oil re- fineries in Louisiana and Mississippi- trial energy community is the question of why alternative energy sources, such as coal, solar, wind

Aggarwal, Suresh K.

205

Electron-State Hybridization in Heavy-Fermion Systems  

NLE Websites -- All DOE Office Websites (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.

206

Electron-State Hybridization in Heavy-Fermion Systems  

NLE Websites -- All DOE Office Websites (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.

207

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

208

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

209

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

210

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

211

Electron-State Hybridization in Heavy-Fermion Systems  

NLE Websites -- All DOE Office Websites (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.

212

Precision engineering for future propulsion and power systems: a perspective from Rolls-Royce  

Science Journals Connector (OSTI)

...supplying integrated power systems to a wide variety...providing high-integrity power systems and services for...into the civil nuclear power arena, the gas turbine...the Rolls-Royce motor car (figure-1) and of...specification of 25 psig. Her water never goes above 70C...

2012-01-01T23:59:59.000Z

213

Electric Propulsion  

Science Journals Connector (OSTI)

...weight, long life-time, and...elec-trically conducting gas; and (iii...but neutral gas, are not subject...systems the turbine extracts from...operation, the remaining fraction of...radiate away the remaining heat, the size...power of the turbine-out-let...if it is a gas, it must be...

W. E. Moeckel

1963-10-11T23:59:59.000Z

214

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

215

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

SciTech Connect

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

216

Solid Oxide Fuel Cell Hybrid System for Distributed Power Generation  

SciTech Connect

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

217

Nuclear Hybrid Energy Systems: Molten Salt Energy Storage  

SciTech Connect

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

218

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

219

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

220

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

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

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

222

Experiences from the Roadrunner petascale hybrid systems  

SciTech Connect

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

223

Neural Network Based Energy Storage System Modeling for Hybrid Electric Vehicles  

SciTech Connect

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

224

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

SciTech Connect

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

225

In-Use Performance Comparison of Hybrid Electric, CNG, and Diesel...  

NLE Websites -- All DOE Office Websites (Extended Search)

Maintenance Costs - The propulsion- related vehicle systems include the exhaust; fuel; engine; electric propulsion; nonlighting electrical (general electrical, charging, cranking,...

226

SOLID OXIDE FUEL CELL HYBRID SYSTEM FOR DISTRIBUTED POWER GENERATION  

SciTech Connect

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

227

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

228

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

229

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

230

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"

231

Hybrid Plasma Reactor/Filter for Transportable Collective Protection Systems  

SciTech Connect

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

232

Integrated Mathematical Modeling Software Series of Vehicle Propulsion...  

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

Mathematical Modeling Software Series of Vehicle Propulsion System: (1) Tractive Effort (T sub ew) of Vehicle Road WheelTrack Sprocket Integrated Mathematical Modeling Software...

233

Advances in Diode Laser Absorption Sensors for Combustion and Propulsion  

Science Journals Connector (OSTI)

Progress is reported in the evolution of diode laser sensors for combustion and propulsion systems. Applications are diverse, ranging from IC engines and gas turbine combustors to...

Hanson, Ronald K

234

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

235

Simplest AB-Thermonuclear Space Propulsion and Electric Generator  

E-Print Network (OSTI)

The author applies, develops and researches mini-sized Micro- AB Thermonuclear Reactors for space propulsion and space power systems. These small engines directly convert the high speed charged particles produced in the thermonuclear reactor into vehicle thrust or vehicle electricity with maximum efficiency. The simplest AB-thermonuclear propulsion offered allows spaceships to reach speeds of 20,000 50,000 km/s (1/6 of light speed) for fuel ratio 0.1 and produces a huge amount of useful electric energy. Offered propulsion system permits flight to any planet of our Solar system in short time and to the nearest non-Sun stars by E-being or intellectual robots during a single human life period. Key words: AB-propulsion, thermonuclear propulsion, space propulsion, thermonuclear power system.

Alexander Bolonkin

2007-01-19T23:59:59.000Z

236

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

237

Hybrid Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

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

238

High performance path following for marine vehicles using azimuthing podded propulsion  

E-Print Network (OSTI)

Podded propulsion systems offer greater maneuvering possibilities for marine vehicles than conventional shaft and rudder systems. As the propulsion unit rotates about its vertical axis to a specified azimuth angle, the ...

Greytak, Matthew B. (Matthew Bardeen)

2006-01-01T23:59:59.000Z

239

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

240

Marine Nuclear Propulsion  

Science Journals Connector (OSTI)

... June 30 about 95 qualified scientists and engineers were engaged on research and development on marine nuclear ... nuclear propulsion within his Department, including the Atomic Energy Authority and the Ship Research Association. This ...

1965-07-31T23:59:59.000Z

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

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

242

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

243

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

244

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

245

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

246

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

247

Coil system for a mirror-based hybrid reactor  

SciTech Connect

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

248

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

249

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

Energy.gov (U.S. Department of Energy (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.

250

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

251

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

252

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

253

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)

254

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.

255

Radioisotope electric propulsion (REP): A near-term approach to nuclear propulsion  

Science Journals Connector (OSTI)

Studies over the last decade have shown radioisotope-based nuclear electric propulsion to be enhancing and, in some cases, enabling for many potential robotic science missions. Also known as radioisotope electric propulsion (REP), the technology offers the performance advantages of traditional reactor-powered electric propulsion (i.e., high specific impulse propulsion at large distances from the Sun), but with much smaller, affordable spacecraft. Future use of REP requires development of radioisotope power sources with system specific powers well above that of current systems. The US Department of Energy and NASA have developed an advanced Stirling radioisotope generator (ASRG) engineering unit, which was subjected to rigorous flight qualification-level tests in 2008, and began extended lifetime testing later that year. This advancement, along with recent work on small ion thrusters and life extension technology for Hall thrusters, could enable missions using REP sometime during the next decade.

George R. Schmidt; David H. Manzella; Hani Kamhawi; Tibor Kremic; Steven R. Oleson; John W. Dankanich; Leonard A. Dudzinski

2010-01-01T23:59:59.000Z

256

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

257

A new hybrid algorithm for analysis of HVdc and FACTs systems  

SciTech Connect

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

258

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

259

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

260

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

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

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

262

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

263

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

264

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

265

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

266

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

267

Recent advances in nuclear powered electric propulsion for space exploration  

Science Journals Connector (OSTI)

Nuclear and radioisotope powered electric thrusters are being developed as primary in space propulsion systems for potential future robotic and piloted space missions. Possible applications for high-power nuclear electric propulsion include orbit raising and maneuvering of large space platforms, lunar and Mars cargo transport, asteroid rendezvous and sample return, and robotic and piloted planetary missions, while lower power radioisotope electric propulsion could significantly enhance or enable some future robotic deep space science missions. This paper provides an overview of recent US high-power electric thruster research programs, describing the operating principles, challenges, and status of each technology. Mission analysis is presented that compares the benefits and performance of each thruster type for high priority NASA missions. The status of space nuclear power systems for high-power electric propulsion is presented. The paper concludes with a discussion of power and thruster development strategies for future radioisotope electric propulsion systems.

R. Joseph Cassady; Robert H. Frisbee; James H. Gilland; Michael G. Houts; Michael R. LaPointe; Colleen M. Maresse-Reading; Steven R. Oleson; James E. Polk; Derrek Russell; Anita Sengupta

2008-01-01T23:59:59.000Z

268

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...

269

Facilitated transport membrane hybrid systems for olefin purification  

SciTech Connect

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

270

Thermodynamics and rocket propulsion  

Science Journals Connector (OSTI)

Thermodynamics and rocket propulsion ... This paper outlines the application of the principles of chemical thermodynamics to a comparison of the merit of one rocket propellant (fuel plus oxidizer) with that of another fuel-oxidizer pair for liquid-fueled rocket motors. ... Thermodynamics ...

Frank H. Verhoek

1969-01-01T23:59:59.000Z

271

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

272

Hybrid Ground Source System Analysis and Tool Development  

Energy.gov (U.S. Department of Energy (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.

273

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

274

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

275

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

276

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

277

Fluorescence from a quantum dot and metallic nanosphere hybrid system  

SciTech Connect

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

278

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

279

Solar Sail Propulsion: An Enabling Technology for Fundamental Physics Missions  

Science Journals Connector (OSTI)

Solar sails enable a wide range of high- ... system. They are also an enabling propulsion technology for two types of deep-space missions ... and the large-scale gravitational field of the solar system: the first...

Bernd Dachwald; Wolfgang Seboldt; Claus Lammerzahl

2008-01-01T23:59:59.000Z

280

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 "hybrid propulsion 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

JET PROPULSION LABORATORY 1979 Annual Report  

E-Print Network (OSTI)

, is the most active and complex volcanic body in our solar system and has a surface composed primarily of Technology and the National Aeronautics and Space Administration for the period January 1 to December 31 JPL Technology Institutional Activities JET PROPULSION LABORATORY California Institute of Technology

Waliser, Duane E.

282

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

283

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.

284

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

285

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

286

Vehicle Technologies Office: Materials for Hybrid and Electric Drive Systems  

Energy.gov (U.S. Department of Energy (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...

287

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

288

Feasibility of MHD submarine propulsion  

SciTech Connect

This report describes the work performed during Phase 1 and Phase 2 of the collaborative research program established between Argonne National Laboratory (ANL) and Newport News Shipbuilding and Dry Dock Company (NNS). Phase I of the program focused on the development of computer models for Magnetohydrodynamic (MHD) propulsion. Phase 2 focused on the experimental validation of the thruster performance models and the identification, through testing, of any phenomena which may impact the attractiveness of this propulsion system for shipboard applications. The report discusses in detail the work performed in Phase 2 of the program. In Phase 2, a two Tesla test facility was designed, built, and operated. The facility test loop, its components, and their design are presented. The test matrix and its rationale are discussed. Representative experimental results of the test program are presented, and are compared to computer model predictions. In general, the results of the tests and their comparison with the predictions indicate that thephenomena affecting the performance of MHD seawater thrusters are well understood and can be accurately predicted with the developed thruster computer models.

Doss, E.D. (ed.) (Argonne National Lab., IL (United States)); Sikes, W.C. (ed.) (Newport News Shipbuilding and Dry Dock Co., VA (United States))

1992-09-01T23:59:59.000Z

289

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

290

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

SciTech Connect

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

291

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.

292

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

293

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

294

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

295

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

296

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

297

Diesel-electric marine propulsion grows in popularity  

SciTech Connect

A recent conference on electric ship propulsion held in London highlighted the big strides made in this field in the last few years. What has given the technology a tremendous fillip in recent years is the new generation of ac/ac electrical drives resulting from the development of reliable high-power semiconductor devices and their associated control systems. Diesel-electric propulsion systems provide flexibility both for the operation of the vessel and in the layout of the main components - gen-sets, converters, switchgear and propulsion motors, for example. Furthermore, the system enables the `power station` philosophy to be applied, with propulsion and all ship`s services being supplied from one power source. This paper discusses the main diesel electric systems available today.

Mullins, P.

1996-03-01T23:59:59.000Z

298

Application of ion electrospray propulsion to lunar and interplanetary missions  

E-Print Network (OSTI)

High specific impulse electric propulsion systems enable ambitious lunar and interplanetary missions that return a wealth of scientific data. Many of these technologies are difficult to scale down, meaning the spacecraft ...

Whitlock, Caleb W. (Caleb Wade)

2014-01-01T23:59:59.000Z

299

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

300

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 "hybrid propulsion 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

Optimal vortex rings and aquatic propulsion mechanisms  

Science Journals Connector (OSTI)

...vortex rings and aquatic propulsion mechanisms P. F. Linden...fluid mechanics behind these propulsion mechanisms and show that...over the cycle. 4. FISH PROPULSION BY UNDULATORY SWIMMING Most marine organisms have only discrete...

2004-01-01T23:59:59.000Z

302

A Fuzzy-Based Strategy to Improve Control Reconfiguration Performance of a Sensor Fault-Tolerant Induction Motor Propulsion  

E-Print Network (OSTI)

recovery in the Electric (EV) or Hybrid Electric Vehicle (HEV) induction motor drive. To achieve this goal-ref · Fault Tolerant Controller HybridHybrid ElectricElectric VehicleVehicle Induction Motor Sensorless Fuzzy-Tolerant Induction Motor Propulsion Bekheira Tabbache1,2 , Mohamed Benbouzid1 , Abdelaziz Kheloui2 and Jean

Paris-Sud XI, Université de

303

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

304

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

305

Life Cycle Modeling of Propulsion Materials  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

propulsion materials manufacturing technologies with an emphasis on aluminum, magnesium, titanium, and ceramics * Advanced propulsion materials' potential in heavy-duty...

306

Advanced Propulsion Technology Strategy | Department of Energy  

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

Propulsion Technology Strategy Advanced Propulsion Technology Strategy GM is also developing new classes of electrically driven vehicles, leveraging technology first used in their...

307

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

308

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

309

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

310

E-Print Network 3.0 - advanced space propulsion Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Summary: for space drilling. The Jet Propulsion Laboratory's (JPL) ultrasonicsonic drillercorer (USDC... 1 Design and Modeling of the NU Smart Space Drilling System (SSDS)...

311

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

NLE Websites -- All DOE Office Websites (Extended Search)

on the field emission principle... advanced technology in power conversion. The main advantages of a propulsion system based on the field emis... AS THRUSTERS FOR ELECTRIC SPACE...

312

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

313

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

314

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

315

Conceptual design of the bimodal nuclear power and propulsion system based on the TOPAZ?2 type thermionic reactor?converter with the modernized single?cell thermionic fuel elements  

Science Journals Connector (OSTI)

The paper presents characteristics and conceptual design of the bimodal space thermionic system with the single?cell thermionic fuel elements intended for operation in two modes: steady?state power mode wherein the electric power is generated required for supply of the spaceborne systems at a level of 20 kWe and forced power and propulsion mode. The paper contains results of the design studies performed by the Small Business NP Energotech under the Agreement with Rockwell International/Rocketdyne Division and according to the Rocketdyne Division provided Design Requirements. Involved in the work was the team of specialists of RRC Kurchatov Institute CDBMB and Research Institute of SPA Luch.

Nikolai N. Ponomarev?Stepnoi; Veniamin A. Usov; Yuri V. Nikolaev; Aleksander S. Gontar; Boris G. Oglobin; Aleksei N. Luppov; Aleksander V. Klimov; Yevgeny D. Avdoshyn

1995-01-01T23:59:59.000Z

316

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

317

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

318

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

319

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

320

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

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

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

322

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

323

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

SciTech Connect

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

324

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

325

Fluidic electrodynamics: Approach to electromagnetic propulsion  

SciTech Connect

We report on a new methodological approach to electrodynamics based on a fluidic viewpoint. We develop a systematic approach establishing analogies between physical magnitudes and isomorphism (structure-preserving mappings) between systems of equations. This methodological approach allows us to give a general expression for the hydromotive force, thus re-obtaining the Navier-Stokes equation departing from the appropriate electromotive force. From this ground we offer a fluidic approach to different kinds of issues with interest in propulsion, e.g., the force exerted by a charged particle on a body carrying current; the magnetic force between two parallel currents; the Magnus's force. It is shown how the intermingle between the fluid vector fields and electromagnetic fields leads to new insights on their dynamics. The new concepts introduced in this work suggest possible applications to electromagnetic (EM) propulsion devices and the mastery of the principles of producing electric fields of required configuration in plasma medium.

Martins, Alexandre A.; Pinheiro, Mario J. [Institute for Plasmas and Nuclear Fusion and Instituto Superior Tecnico Lisboa, Portugal 351.1.21.841.92.43 (Portugal); Department of Physics and Institute for Plasmas and Nuclear Fusion and Instituto Superior Tecnico Lisboa, Portugal 351.1.21.841.93.22 (Portugal)

2009-03-16T23:59:59.000Z

326

Interplanetary space transport using inertial fusion propulsion  

SciTech Connect

In this paper, we indicate how the great advantages that ICF offers for interplanetary propulsion can be accomplished with the VISTA spacecraft concept. The performance of VISTA is expected to surpass that from other realistic technologies for Mars missions if the energy gain achievable for ICF targets is above several hundred. Based on the good performance expected from the U. S. National Ignition Facility (NIF), the requirements for VISTA should be well within the realm of possibility if creative target concepts such as the fast ignitor can be developed. We also indicate that a 6000-ton VISTA can visit any planet in the solar system and return to Earth in about 7 years or less without any significant physiological hazards to astronauts. In concept, VISTA provides such short-duration missions, especially to Mars, that the hazards from cosmic radiation and zero gravity can be reduced to insignificant levels. VISTA therefore represents a significant step forward for space-propulsion concepts.

Orth, C.D.

1998-04-20T23:59:59.000Z

327

Fast Track nuclear thermal propulsion concept  

Science Journals Connector (OSTI)

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

Richard A. Johnson; Herbert R. Zweig; Martin H. Cooper; Jack Wett Jr.

1993-01-01T23:59:59.000Z

328

Fast Track'' nuclear thermal propulsion concept  

SciTech Connect

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

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

1993-01-10T23:59:59.000Z

329

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

330

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

331

COGAS propulsion for LNG ships  

Science Journals Connector (OSTI)

Propulsion of liquefied natural gas (LNG) ships is undergoing significant change. The traditional steam plant is losing favor because of its low cycle efficiency. Medium-speed diesel-electric and slow-speed di...

Edwin G. Wiggins

2011-06-01T23:59:59.000Z

332

Strategic Technology JET PROPULSION LABORATORY  

E-Print Network (OSTI)

Strategic Technology Directions JET PROPULSION LABORATORY National Aeronautics and Space Administration 2 0 0 9 #12;© 2009 California Institute of Technology. Government sponsorship acknowledged. #12;Strategic Technology Directions 2009 offers a distillation of technologies, their links to space missions

Waliser, Duane E.

333

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

SciTech Connect

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

334

Nuclear Propulsion in Space (1968)  

ScienceCinema (OSTI)

Project NERVA was an acronym for Nuclear Engine for Rocket Vehicle Application, a joint program of the U.S. Atomic Energy Commission and NASA managed by the Space Nuclear Propulsion Office (SNPO) at the Nuclear Rocket Development Station in Jackass Flats, Nevada U.S.A. Between 1959 and 1972, the Space Nuclear Propulsion Office oversaw 23 reactor tests, both the program and the office ended at the end of 1972.

None

2014-06-17T23:59:59.000Z

335

Nuclear Propulsion in Space (1968)  

SciTech Connect

Project NERVA was an acronym for Nuclear Engine for Rocket Vehicle Application, a joint program of the U.S. Atomic Energy Commission and NASA managed by the Space Nuclear Propulsion Office (SNPO) at the Nuclear Rocket Development Station in Jackass Flats, Nevada U.S.A. Between 1959 and 1972, the Space Nuclear Propulsion Office oversaw 23 reactor tests, both the program and the office ended at the end of 1972.

None

2012-06-23T23:59:59.000Z

336

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

337

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

338

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

SciTech Connect

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

339

Vehicle Technologies Office: Propulsion Systems  

Energy.gov (U.S. Department of Energy (DOE))

Vehicle Technologies Office research focuses much of its effort on improving vehicle fuel economy while meeting increasingly stringent emissions standards. Achieving these goals requires a...

340

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

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

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

342

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

343

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

344

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.

345

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

346

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

Energy.gov (U.S. Department of Energy (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.

347

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

348

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

349

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.

350

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

351

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

352

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.

353

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

354

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

355

Hybrid Electric Vehicles - HEV Modeling  

NLE Websites -- All DOE Office Websites (Extended Search)

Modeling Modeling Background Because of time and cost constraints, designers cannot build and test each of the many possible powertrain configurations for advanced vehicles. Thus, developing fuel cells and hybrid electric vehicles (HEVs) requires accurate, flexible simulation tools. Argonne undertook a collaborative effort to further develop Autonomie in collaboration with General Motors. Autonomie is sponsored by the U.S. Department of Energy (DOE) Vehicle Technologies Program. Autonomie is a Plug-and-Play Powertrain and Vehicle Model Architecture and Development Environment to support the rapid evaluation of new powertrain/propulsion technologies for improving fuel economy through virtual design and analysis in a math-based simulation environment. Autonomie is an open architecture to support the rapid integration and analysis of powertrain/propulsion systems and technologies for rapid technology sorting and evaluation of fuel economy improvement under dynamic/transient testing conditions. The capability to sort technologies rapidly in a virtual design environment results in faster improvements in real-world fuel consumption by reducing the time necessary to develop and bring new technologies onto our roads.

356

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

357

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

358

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

359

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

360

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

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

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

362

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

363

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

364

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

365

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

366

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

367

Modelling and control of a medium-duty hybrid electric truck  

Science Journals Connector (OSTI)

The main contributions of this paper are the development of a forward-looking hybrid vehicle simulation tool, and its application to the design of a power management control algorithm. The hybrid electric vehicle simulation tool (HE-VESIM) was developed at the Automotive Research Center of the University of Michigan to study the potential fuel economy and emission benefits of the parallel hybrid propulsion system for a medium truck. The fundamental architecture of the feed-forward simulation tool and the dynamic equations of its sub-system modules are first described. A power management control algorithm is then designed and evaluated, which is based on mimicking the behaviour of a dynamic-programming optimisation scheme. Simulation results over an urban driving cycle demonstrate that the hybrid control algorithm is able to improve vehicle fuel economy significantly, compared with the original vehicle, powered only by a diesel engine.

C.-C. Lin; Z. Filipi; L. Louca; H. Peng; D. Assanis; J. Stein

2004-01-01T23:59:59.000Z

368

Supervisory Power Management Control Algorithms for Hybrid Electric Vehicles: A Survey  

SciTech Connect

The growing necessity for environmentally benign hybrid propulsion systems has led to the development of advanced power management control algorithms to maximize fuel economy and minimize pollutant emissions. This paper surveys the control algorithms for hybrid electric vehicles (HEVs) and plug-in HEVs (PHEVs) that have been reported in the literature to date. The exposition ranges from parallel, series, and power split HEVs and PHEVs and includes a classification of the algorithms in terms of their implementation and the chronological order of their appearance. Remaining challenges and potential future research directions are also discussed.

Malikopoulos, Andreas [ORNL

2014-01-01T23:59:59.000Z

369

Berry phase and Hannays angle in the BornOppenheimer hybrid systems  

SciTech Connect

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

370

Elastic tail propulsion at low Reynolds number  

E-Print Network (OSTI)

A simple way to generate propulsion at low Reynolds number is to periodically oscillate a passive flexible filament. Here we present a macroscopic experimental investigation of such a propulsive mechanism. A robotic swimmer ...

Yu, Tony S. (Tony Sheung)

2007-01-01T23:59:59.000Z

371

Design Principles of a flywheel Regenerative Braking System (f-RBS) for Formula SAE type racecar and system testing on a Virtual Test Rig modeled on MSC ADAMS  

E-Print Network (OSTI)

momentum in the industry [4]. These vehicles (BEVs and HEVS) use electric motor/generator pairs to propel themselves and to recapture braking energy (electric RBS) and the power source is the battery. The regenerative braking system uses a generator..., aerodynamic and road losses. 4. Improvised Transmission design to reduce losses. 5. Hybrid and Alternative Energy Propulsion systems e.g. the Hybrid Electric Vehicle (HEV), the Fuel Cell Vehicle (FCV). 6. Recycling Braking energy Storage and reuse...

Pochiraju, Anirudh

2012-08-31T23:59:59.000Z

372

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

373

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

374

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

375

Numerical study on active wave devouring propulsion  

Science Journals Connector (OSTI)

The possibility of extracting energy from gravity waves for marine propulsion was numerically studied by a two-dimensional...

Liyanarachchi Waruna Arampath De Silva

2012-09-01T23:59:59.000Z

376

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

377

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

SciTech Connect

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

378

Australian Science and Technology with Relevance to Beamed Energy Propulsion  

SciTech Connect

Although Australia has no Beamed Energy Propulsion programs at the present time, it is accomplishing significant scientific and technological activity that is of potential relevance to Beamed Energy Propulsion (BEP). These activities include: continual upgrading and enhancement of the Woomera Test Facility, Which is ideal for development and test of high power laser or microwave systems and the flight vehicles they would propel; collaborative development and test, with the US and UK of hypersonic missiles that embody many features needed by beam-propelled flight vehicles; hypersonic air breathing propulsion systems that embody inlet-engine-nozzle features needed for beam-riding agility by air breathing craft; and research on specially conditioned EM fields that could reduce beamed energy lost during atmospheric propagation.

Froning, H. David Jr [PO Box 180, Gumeracha SA 5233 (Australia)

2008-04-28T23:59:59.000Z

379

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

380

American Institute of Aeronautics and Astronautics Electrolysis Propulsion for CubeSat-Scale Spacecraft  

E-Print Network (OSTI)

is becoming clear. A water-electrolysis propulsion system for 3U CubeSats is proposed that could fill the gapAmerican Institute of Aeronautics and Astronautics 1 Electrolysis Propulsion for Cube as electrolyte. With over 1 km/s of V from 1 kg of water as propellant, sample missions include compensating

Peck, Mason A.

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

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

382

The Progress of Marine Propulsion  

Science Journals Connector (OSTI)

... ships. Inventions, improvements, innovations have followed in rapid succession, and the history of marine engineering presents an endless and bewildering variety of engines and boilers which have been adopted ... so many rival methods of driving ships as they have to-day, each method of propulsion making by its performance or promise some claim to consideration. Modern ...

EDGAR C. SMITH

1929-03-09T23:59:59.000Z

383

A hybrid inventory management system respondingto regular demand and surge demand  

SciTech Connect

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

384

Numerical Investigation of Laser Propulsion for Transport in Water Environment  

SciTech Connect

Problems that cumber the development of the laser propulsion in atmosphere and vacuum are discussed. Based on the theory of interaction between high-intensity laser and materials, as air and water, it is proved that transport in water environment can be impulsed by laser. The process of laser propulsion in water is investigated theoretically and numerically. It shows that not only the laser induced plasma shock wave, but also the laser induced bubble oscillation shock waves and the pressure induced by the collapsing bubble can be used. Many experimental results show that the theory and the numerical results are valid. The numerical result of the contribution of every propulsion source is given in percentage. And the maximum momentum coupling coefficient Cm is given. Laser propulsion in water environment can be applied in many fields. For example, it can provide highly controllable forces of the order of micro-Newton ({mu}N) in microsystems, such as the MEMS (Micro-electromechanical Systems). It can be used as minimally invasive surgery tools of high temporal and spatial resolution. It can be used as the propulsion source in marine survey and exploitation.

Han Bing; Li Beibei; Zhang Hongchao; Chen Jun; Shen Zhonghua; Lu Jian; Ni Xiaowu [Department of Science, Nanjing University of Science and Technology, Nanjing 210094 (China)

2010-10-08T23:59:59.000Z

385

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

386

Hybrid methods for witnessing entanglement in a microscopic-macroscopic system  

SciTech Connect

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

387

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

SciTech Connect

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

388

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

SciTech Connect

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

389

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

390

Progress towards accelerating HOMME on hybrid multi- core systems  

SciTech Connect

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

391

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

392

FY2001 Progress Report for Automotive Propulsion Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

AUTOMOTIVE PROPULSION AUTOMOTIVE PROPULSION MATERIALS 2 0 0 1 A N N U A L P R O G R E S S R E P O R T U.S. Department of Energy Energy Efficiency and Renewable Energy Office of Transportation Technologies A C K N O W L E D G E M E N T We would like to express our sincere appreciation to Argonne National Laboratory, Computer Systems Management, Inc., and Oak Ridge National Laboratory, for their artistic and technical contributions in preparing and publishing this report. In addition, we would like to thank all our program participants for their contributions to the programs and all the authors who prepared the project abstracts that comprise this report. U.S. Department of Energy Office of Advanced Automotive Technologies 1000 Independence Avenue S.W. Washington, DC 20585-0121 FY 2001 Progress Report for Propulsion Materials

393

Life cycle considerations in propulsion alternatives for fast vessels  

SciTech Connect

Fast vessels are being built and operated for a large range of passenger-carrying applications. Fast cargo-carrying vessels are being considered in a variety of sizes as well. A major decision in design and construction of these vessels is the propulsion system; this decision has major impacts on the operation economics as well as the operational capabilities of the vessels. Factors involved in consideration of propulsion alternatives for fast vessels are examined, with emphasis upon the total life cycle operating implications of these factors. A methodology for considering the factors is suggested, and an example is presented with results of the consideration tradeoffs.

Luck, D.L. [General Electric Co., Evendale, OH (United States). GE Marine and Industrial Engines

1996-07-01T23:59:59.000Z

394

Advanced Turbine Technology Applications Project (ATTAP) and Hybrid Vehicle Turbine Engine Technology Support project (HVTE-TS): Final summary report  

SciTech Connect

This final technical report was prepared by Rolls-Royce Allison summarizing the multiyear activities of the Advanced Turbine Technology Applications Project (ATTAP) and the Hybrid Vehicle Turbine Engine Technology Support (HVTE-TS) project. The ATTAP program was initiated in October 1987 and continued through 1993 under sponsorship of the US Department of Energy (DOE), Energy Conservation and Renewable Energy, Office of Transportation Technologies, Propulsion Systems, Advanced Propulsion Division. ATTAP was intended to advance the technological readiness of the automotive ceramic gas turbine engine. The target application was the prime power unit coupled to conventional transmissions and powertrains. During the early 1990s, hybrid electric powered automotive propulsion systems became the focus of development and demonstration efforts by the US auto industry and the Department of energy. Thus in 1994, the original ATTAP technology focus was redirected to meet the needs of advanced gas turbine electric generator sets. As a result, the program was restructured to provide the required hybrid vehicle turbine engine technology support and the project renamed HVTE-TS. The overall objective of the combined ATTAP and HVTE-TS projects was to develop and demonstrate structural ceramic components that have the potential for competitive automotive engine life cycle cost and for operating 3,500 hr in an advanced high temperature turbine engine environment. This report describes materials characterization and ceramic component development, ceramic components, hot gasifier rig testing, test-bed engine testing, combustion development, insulation development, and regenerator system development. 130 figs., 12 tabs.

NONE

1998-12-01T23:59:59.000Z

395

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

SciTech Connect

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

396

Advanced Propulsion Technology Strategy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Unit Charge Port CHARGING AND INFRASTRUCTURE ELECTRIC MOTORS POWER CONTROL BATTERIES FUEL CELLS POWERTRAIN ELECTRIFICATION GLOBAL BATTERY SYSTEMS LAB BROWNSTOWN TOWNSHIP...

397

CHAPTER 14 - Future of Solid Rocket Propulsion  

Science Journals Connector (OSTI)

Publisher Summary The technological progress of propulsion systems using solid propellants has so far been possible because of the expression of new requirements and the emergence of diversified applications. The search for optimal propellant performancespecific impulse Is and volumetric specific impulse Is ?continues to be the most important research mission, coupled with other expected technological progress. For composite propellants, revolutionary progress has been achieved only through extensive modifications of the active parts of the manufacturing process. So far, the difficulties facing this development do not involve basic issues such as mechanical components; rather they involve variety of issues ranging from the amount of precision required in the continuous feeding of raw materials and the high level of sensitivity of the propellants to minute variations in the amounts of crosslinking agent or catalyst. The technology of the ramjets and ramrockets is relevent to numerous applications to missiles. The range of systems from several hundred kilometers to several thousand kilometers is a possibility that is being investigated. The development of this type of propulsion is going to take several directions. Beyond applications to high-performance military missiles, the emphasis is placed on costs, particularly for mass industrial productions and very large missiles. This emphasis is not only on the production costs but also on the development costs, implying significant changes in the methods of development.

ALAIN DAVENAS

1993-01-01T23:59:59.000Z

398

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

399

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

400

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

SciTech Connect

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

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

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

402

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

403

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

SciTech Connect

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

404

Evaluation of 2004 Toyota Prius Hybrid Electric Drive System Interim Report  

SciTech Connect

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

405

Radiofrequency in propulsion application to commercial satellites  

SciTech Connect

Application of the RITA ion propulsion system for the Eureca and SAT-2 missions is considered. In the RITA-10 system, xenon is stored at 50-60 bar in a pressure tank, a pressure reduction device reduces the variable high pressure to a constant pressure of 1.5 bar, and a single unit controls the mass flow independently for both the thruster and the neutralizer. The present thruster does not employ isolators between the discharge chamber and the structure, and it achieves thrust level variation by variation of the RF power at constant exhaust velocity. The RF ionizaton system does not require constant generation of electrons during discharge operation. For SAT-2, the requirements are for a thrust level of 15 mN + or - 5 percent and a lifetime of 7000 hours per thruster.

Bassner, H.F.; Berg, H.P.; Kukies, R.

1989-01-01T23:59:59.000Z

406

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

407

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

408

Initial results from the operation of village hybrid systems in Chile  

SciTech Connect

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

409

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

410

Centenary of Practical Marine Screw Propulsion  

Science Journals Connector (OSTI)

... To mark the centenary of practical marine screw ... screw propulsion, a special exhibit was opened at the Science Museum, South Kensington, on February ...

1937-02-13T23:59:59.000Z

411

Low Cost Titanium ? Propulsion Applications | Department of...  

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

Applications Low Cost Titanium Propulsion Applications 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer...

412

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

SciTech Connect

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

413

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

414

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

415

Fabrication and characterization of sintered porous glass emitters for electrospray propulsion  

E-Print Network (OSTI)

Ionic electrospray thrusters are promising candidates for CubeSat propulsion systems in space, due to their low power requirement and small form factor. Current technology has demonstrated thrust levels of 10 - 40[mu]N, ...

Xie, Julie

2014-01-01T23:59:59.000Z

416

Thermoelectric Microdevice Fabrication Process and Evaluation at the Jet Propulsion Laboratory (JPL)  

E-Print Network (OSTI)

system), radioisotope thermoelectric generators (RTGs) are used for power [1]. Thermoelectric devicesThermoelectric Microdevice Fabrication Process and Evaluation at the Jet Propulsion Laboratory (JPL of integrated thermal management and power management and distribution. Micro thermoelectric converters

417

PC-Based Modeling and Simulation of Large Marine Propulsion Plant  

Science Journals Connector (OSTI)

At present, most of marine engine room simulators (MERS) in the ... So a simulation system of a PC-Based marine propulsion plant has been developed for training. In ... paper, a transient simulation model for lar...

Sun Jianbo; Guo Chen

2010-01-01T23:59:59.000Z

418

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

419

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

420

Propulsive performance from oscillating propulsors with spanwise flexibility  

Science Journals Connector (OSTI)

...dimensional oscillating foil propulsion. M.Eng. thesis...Bose, N. 1991 Propulsion from an oscillating...planform. In Proc. Marine Dynamics Conf. 1991...Hydromechanics of swimming propulsion. Part 1. Swimming...Canada, Institute of Marine Dynamics report, no...

1997-01-01T23:59:59.000Z

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

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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.

422

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

423

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

424

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

NLE Websites -- All DOE Office Websites (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:

425

Vehicle Technologies Office: 2012 Propulsion Materials R&D Annual...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Propulsion Materials R&D Annual Progress Report Vehicle Technologies Office: 2013 Propulsion Materials R&D Annual Progress Report Low-Cost Direct Bonded Aluminum (DBA) Substrates...

426

Principles of Jet Propulsion and Gas Turbines  

Science Journals Connector (OSTI)

... the presentation of the basic theory of jet propulsion and the thermodynamics of the gas-turbine and rocket types of engine. The layout follows a logical sequence, on the whole ... reader is treated to the now well-known thermodynamic analysis of the power-producing gas turbine cycle, which seems rather misplaced in a book dealing with jet propulsion. In his ...

S. J. MOYES

1949-08-06T23:59:59.000Z

427

Cover: Mariner 9 spacecraft. JET PROPULSION  

E-Print Network (OSTI)

#12;Cover: Mariner 9 spacecraft. #12;JET PROPULSION LABORATORY 1971 ANNUAL REPORT A descrtptlon Jet Propulsion Laboratory CALIFORNIA INSTITUTE OF TECHNOLOGY 4800 OAK GROVE DRIVE PASADENA, CALIFORNIA 91103 #12;#12;DIRECTOR'S MESSAGE The successful orbiting of Mariner 9 around the planet Mars

Waliser, Duane E.

428

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

Energy.gov (U.S. Department of Energy (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.

429

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

SciTech Connect

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

430

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

431

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

SciTech Connect

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

432

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

433

Development of a 3-D hybrid code and its application to M2P2  

Science Journals Connector (OSTI)

The mini-magnetospheric plasma propulsion (M2P2) system is a novel concept for deep space propulsion. It is based on the interaction between an expanding high-? plasma from a spacecraft with the fast speed ambient solar wind. As a complement to the existing MHD modeling we are developing kinetic models for the M2P2 interactions. In our initial attempt we have developed a hybrid model in which ions are treated kinetically using a particle-in-cell code and electrons are treated as a mass-less fluid. We present here our initial results showing the ballooning of the magnetic field generated by a solenoid on a spacecraft. The ballooning is accompanied by a dense plasma expanding across the magnetic field.

Saikat Saha; Nagendra Singh; Paul Craven; Dennis Gallagher; Jonathan Jones

2002-01-01T23:59:59.000Z

434

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

435

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

436

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

437

Hybrid-Electric Porsche GT3R to Make North American Debut | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hybrid-Electric Porsche GT3R to Make North American Debut Hybrid-Electric Porsche GT3R to Make North American Debut Hybrid-Electric Porsche GT3R to Make North American Debut September 24, 2010 - 4:10pm Addthis The Porsche 911 GT3R will make its North American debut at the Petit Le Mans in Georgia next Saturday. | Department of Energy Image | Photo by Erin Pierce The Porsche 911 GT3R will make its North American debut at the Petit Le Mans in Georgia next Saturday. | Department of Energy Image | Photo by Erin Pierce Paul Lester Communications Specialist for the Office of Energy Efficiency and Renewable Energy What does this mean for me? Petit Le Mans race in Georgia to feature five green vehicles Green Racing Initiative seeks to encourage development of energy efficient vehicles Two 60 kW electric motors part of GT3R's propulsion system

438

Hybrid-Electric Porsche GT3R to Make North American Debut | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hybrid-Electric Porsche GT3R to Make North American Debut Hybrid-Electric Porsche GT3R to Make North American Debut Hybrid-Electric Porsche GT3R to Make North American Debut September 24, 2010 - 4:10pm Addthis The Porsche 911 GT3R will make its North American debut at the Petit Le Mans in Georgia next Saturday. | Department of Energy Image | Photo by Erin Pierce The Porsche 911 GT3R will make its North American debut at the Petit Le Mans in Georgia next Saturday. | Department of Energy Image | Photo by Erin Pierce Paul Lester Communications Specialist for the Office of Energy Efficiency and Renewable Energy What does this mean for me? Petit Le Mans race in Georgia to feature five green vehicles Green Racing Initiative seeks to encourage development of energy efficient vehicles Two 60 kW electric motors part of GT3R's propulsion system

439

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

440

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

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

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

SciTech Connect

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

442

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

443

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

444

Feasibility of MHD submarine propulsion. Phase II, MHD propulsion: Testing in a two Tesla test facility  

SciTech Connect

This report describes the work performed during Phase 1 and Phase 2 of the collaborative research program established between Argonne National Laboratory (ANL) and Newport News Shipbuilding and Dry Dock Company (NNS). Phase I of the program focused on the development of computer models for Magnetohydrodynamic (MHD) propulsion. Phase 2 focused on the experimental validation of the thruster performance models and the identification, through testing, of any phenomena which may impact the attractiveness of this propulsion system for shipboard applications. The report discusses in detail the work performed in Phase 2 of the program. In Phase 2, a two Tesla test facility was designed, built, and operated. The facility test loop, its components, and their design are presented. The test matrix and its rationale are discussed. Representative experimental results of the test program are presented, and are compared to computer model predictions. In general, the results of the tests and their comparison with the predictions indicate that thephenomena affecting the performance of MHD seawater thrusters are well understood and can be accurately predicted with the developed thruster computer models.

Doss, E.D. [ed.] [Argonne National Lab., IL (United States); Sikes, W.C. [ed.] [Newport News Shipbuilding and Dry Dock Co., VA (United States)

1992-09-01T23:59:59.000Z

445

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

446

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

SciTech Connect

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

447

Solar thermal propulsion status and future  

SciTech Connect

The status of solar absorber/thruster research is reviewed, and potential future applications and advanced solar thermal propulsion concepts are discussed. Emphasis is placed on two concepts, the windowless heat exchanger cavity and the porous material absorption concepts. Mission studies demonstrate greater than 50 percent increase in payload compared to chemical propulsion for a LEO-to-GEO mission. Alternative missions that have been considered for this concept include the Thousand Astronomical Unit mission, LEO-to-lunar orbit, and other SEI missions. It is pointed out that solar thermal propulsion is inherently simple and capable of moderate-to-high engine performance at moderate-to-low thrust levels. 15 refs.

Shoji, J.M.; Frye, P.E.; Mcclanahan, J.A. (Rockwell International Corp., Rocketdyne Div., Canoga Park, CA (United States))

1992-03-01T23:59:59.000Z

448

Dual-Mode Hybrid/Two-Mode Hybrid Accomplishment  

NLE Websites -- All DOE Office Websites (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

449

Thomson scattering diagnostic system design for the Compact Toroidal Hybrid experiment  

SciTech Connect

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

450

Development of a Plasma Probe Positioner Positioner for Propulsion Research  

E-Print Network (OSTI)

(real-time, no delay) electric motor that divides a full rotation into a large number of steps1. #12 Advisor: Dr. Edgar Choueiri Mentor: Luke Uribarri #12;PPDyL 2 Outline Spacecraft Propulsion Electric vs. Chemical Propulsion How Electric Propulsion uses Plasma Problem with Electric Propulsion : Onset Solution

Petta, Jason

451

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

452

Innovative nuclear thermal propulsion technology evaluation: Results of the NASA/DOE Task Team study  

SciTech Connect

In response to findings from two NASA/DOE nuclear propulsion workshops held in the summer of 1990, six task teams were formed to continue evaluation of various nuclear propulsion concepts. The Task Team on Nuclear Thermal Propulsion (NTP) created the Innovative Concepts Subpanel to evaluate thermal propulsion concepts which did not utilize solid fuel. The Subpanel endeavored to evaluate each of the concepts on a level technological playing field,'' and to identify critical technologies, issues, and early proof-of-concept experiments. The concepts included the liquid core fission, the gas core fission, the fission foil reactors, explosively driven systems, fusion, and antimatter. The results of the studies by the panel will be provided. 13 refs., 6 figs., 2 tabs.

Howe, S. (Los Alamos National Lab., NM (United States)); Borowski, S. (National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center); Motloch, C. (EG and G Idaho, Inc., Idaho Falls, ID (United States)); Helms, I. (Nuclear Utility Services, Damascus, MD (United States)); Diaz, N.; Anghaie, S. (Florida Univ., Gainesville, FL (United States)); Latham, T. (United

1991-01-01T23:59:59.000Z

453

Full Hybrid: Overview  

NLE Websites -- All DOE Office Websites (Extended Search)

highlighted Stop/Start button banner graphic: blue bar highlighted Stop/Start button banner graphic: blue bar subbanner graphic: gray bar Overview Button highlighted Starting button Low Speed button Cruising button Passing button Braking button Stopped button OVERVIEW Full hybrids use a gasoline engine as the primary source of power, and an electric motor provides additional power when needed. In addition, full hybrids can use the electric motor as the sole source of propulsion for low-speed, low-acceleration driving, such as in stop-and-go traffic or for backing up. This electric-only driving mode can further increase fuel efficiency under some driving conditions. stage graphic: vertical blue rule Main stage: See through car with battery, engine, generator, power split device, and electric motor visible. The car is stopped at an intersection.

454

Full Hybrid: Overview  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

highlighted Starting button Low Speed button Cruising button Passing button Braking button Stopped button highlighted Starting button Low Speed button Cruising button Passing button Braking button Stopped button OVERVIEW Full hybrids use a gasoline engine as the primary source of power, and an electric motor provides additional power when needed. In addition, full hybrids can use the electric motor as the sole source of propulsion for low-speed, low-acceleration driving, such as in stop-and-go traffic or for backing up. This electric-only driving mode can further increase fuel efficiency under some driving conditions. stage graphic: vertical blue rule Main stage: See through car with battery, engine, generator, power split device, and electric motor visible. The car is stopped at an intersection. Main stage: See through car with battery, engine, generator, power split device, and electric motor visible. The car is stopped at an intersection.

455

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

456

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

457

Electric and Hybrid Vehicles Program. Sixteenth annual report to Congress for fiscal year 1992  

SciTech Connect

This report describes the progress achieved in developing electric and hybrid vehicle technologies, beginning with highlights of recent accomplishments in FY 1992. Detailed descriptions are provided of program activities during FY 1992 in the areas of battery, fuel cell, and propulsion system development, and testing and evaluation of new technology in fleet site operations and in laboratories. This Annual Report also contains a status report on incentives and use of foreign components, as well as a list of publications resulting from the DOE program.

Not Available

1993-08-01T23:59:59.000Z

458

The history of alternative fuels in transportation: The case of electric and hybrid cars  

Science Journals Connector (OSTI)

The article describes and presents a critical analysis of the long history of alternative fuels and propulsion technologies, particularly in automobile applications. Cases are electric and hybrid cars. The term critical analysis refers to the analysis of the various alternative technologies in relation to their societal contexts. In particular, these are the varying contexts of energy security, energy policy, environmental problems, sustainability, and also the later more explicit climate change context. This approach gives some knowledge with relevance to the current discussions on implementation issues. The work is first of all founded on the knowledge field of Social Studies of Technological Systems.

Karl Georg Hyer

2008-01-01T23:59:59.000Z

459

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

460

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

Energy.gov (U.S. Department of Energy (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

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

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

462

Marine Nuclear Propulsion for the United Kingdom  

Science Journals Connector (OSTI)

... the Government in an adjournment debate in the House of Commons on March 21 on marine nuclear ... nuclear propulsion, the Joint Parliamentary Secretary to the Ministry of Transport, Mr. John Hay, said ...

1960-04-09T23:59:59.000Z

463

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

SciTech Connect

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

464

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

465

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

466

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

467

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

468

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

469

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

470

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

471

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

472

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

NLE Websites -- All DOE Office Websites (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...

473

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

NLE Websites -- All DOE Office Websites (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...

474

MagLab - MagLab Dictionary: Hybrid Magnet (Transcript)  

NLE Websites -- All DOE Office Websites (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...

475

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

476

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

477

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

SciTech Connect

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

478

The methodology of variable management of propellant fuel consumption by jet-propulsion engines of a spacecraft  

Science Journals Connector (OSTI)

Traditionally, management of propellant fuel consumption on board of a spacecraft is only associated with the operation of jet-propulsion engines (JPE) that are actuator devices of ... systems (MCS). The efficien...

V. S. Kovtun

2012-12-01T23:59:59.000Z

479

The Design and Feasibility of a 10 mN Chemical Space Propulsion Alexander Bruccoleri , Paulo Lozano  

E-Print Network (OSTI)

-1,400 to provide additional data to the community. The nozzle's coefficient of thrust efficiency is approximately class space propulsion systems and recommendations are given for propellant choice, valve and pump

480

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

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481

Reverse and flick: Hybrid locomotion in bacteria  

E-Print Network (OSTI)

Many bacteria are motile. They use one or more helical flagella as propellers, rotating them like the corkscrew on a wine bottle opener. Despite the limited morphological repertoire of the propulsive system, radically ...

Stocker, Roman

482

Design optimization of the electrically peaking hybrid (ELPH) vehicle. Research report  

SciTech Connect

Electrically Peaking Hybrid (ELPH) is a parallel hybrid electric vehicle propulsion concept that was invented at Texas A and M University, by the advanced vehicle systems research group. Over the past six years, design methodologies, component development, and system optimization work has been going on for this invention. This project was a first attempt in integrating the above developments into an optimized design of an ELPH passenger car. Design specifications were chosen for a full size passenger car, performing as well as any conventional car, over the EPA-FTP-75 combined city/highway drive cycles. The results of this design project were two propulsion systems. Both were appropriate for commercial production, from the points of view of cost, availability of the technologies, and components. One utilized regenerative braking and the other did not. Substantial fuel savings and emissions reductions resulted from simulating these designs on the FTP-75 drive cycle. For example, the authors` ELPH full size car, with regenerative braking, was capable of delivering over 50 miles per gallon in city driving, with corresponding reductions in its emissions. This project established the viability of the authors` ELPH concept and their design methodologies, in computer simulations. More work remains to be done on investigating more advanced power plants, such as fuel cells, and more advanced components, such as switched reluctance motor drives, for the authors` designs. Furthermore, the authors` design optimization can be carried out to more detailed levels, for prototyping and production.

Ehsani, M.; Gao, Y.; Butler, K.

1998-10-01T23:59:59.000Z

483

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.

484

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

485

Nuclear electric propulsion : assessing the design of Project Prometheus.  

E-Print Network (OSTI)

The high fuel efficiency of electric propulsion makes it a viable alternative for long-distance space travel. Project Prometheus was a NASA-led project that sought to demonstrate that distant electric propulsion missions ...

Goycoolea, Martin

2013-01-01T23:59:59.000Z

486

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

487

Testing of a 50-kW Wind-Diesel Hybrid System at the National Wind Technology Center  

SciTech Connect

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

488

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

489

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

490

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

491

Modeling and simulation of electric propulsion concepts for a multimodal prototype demonstrator  

Science Journals Connector (OSTI)

The Office of Naval Research (ONR) is planning a prototype demonstration of a novel craft envisioned to have three modes of operation: Fuel-efficient, good sea keeping mode for open ocean transits High-speed, shallow water mode Amphibious ... Keywords: integrated power systems, microgrids, multimodal propulsion, naval electric power systems

J. Herbst; A. Gattozzi; J. Uglum; J. S. Chalfant; C. Chryssostomidis; J. Langston; M. Steurer; M. Andrus

2009-07-01T23:59:59.000Z

492

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

493

Advanced Propulsion Systems | GE Global Research  

NLE Websites -- All DOE Office Websites (Extended Search)

primusenginefeaturedimage3 GE Innovation and Manufacturing in Europe 2-7-7-v-laser-additive-manufacturing Revolutionizing the Age-Old Rules of Manufacturing ...

494

Modification of ordinary-mode reflectometry system to detect lower-hybrid waves in Alcator C-Mod  

SciTech Connect

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

495

LANL debuts hybrid garbage truck  

NLE Websites -- All DOE Office Websites (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...

496

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.

497

Application of the enabler to nuclear electric propulsion  

Science Journals Connector (OSTI)

This paper describes a power system concept that provides the electric power for a baseline electric propulsion system for a piloted mission to Mars. A 10?MWe space power system is formed by coupling an Enabler reactor with a simple non?recuperated closed Brayton cycle. The Enabler reactor is a gas?cooled reactor based on proven reactor technology developed under the NERVA/Rover programs. The selected power cycle which uses a helium?xenon mixture at 1920 K at the turbine inlet is diagramed and described. The specific mass of the power system over the power range from 5 to 70 MWe is given. The impact of operating life on the specific mass of a 10?MWe system is also shown.

Bill L. Pierce

1991-01-01T23:59:59.000Z

498

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

499

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

500

A versatile computer model for the design and analysis of electric and hybrid vehicles  

E-Print Network (OSTI)

The primary purpose of the work reported in this thesis was to develop a versatile computer model to facilitate the design and analysis of hybrid vehicle drive-trains. A hybrid vehicle is one in which power for propulsion comes from two distinct...

Stevens, Kenneth Michael

1996-01-01T23:59:59.000Z