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1

Linear Concentrator Systems | Open Energy Information  

Open Energy Info (EERE)

Linear Concentrator Systems Linear Concentrator Systems Jump to: navigation, search Introduction Linear concentrating collector fields consist of a large number of collectors in parallel rows that are typically aligned in a north-south orientation to maximize both annual and summertime energy collection. With a single-axis sun-tracking system, this configuration enables the mirrors to track the sun from east to west during the day, ensuring that the sun reflects continuously onto the receiver tubes. Parabolic Trough Systems The predominant CSP systems currently in operation in the United States are linear concentrators using parabolic trough collectors. In such a system, the receiver tube is positioned along the focal line of each parabola-shaped reflector. The tube is fixed to the mirror structure and

2

Linear Concentrator System Basics for Concentrating Solar Power |  

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

Linear Concentrator System Basics for Concentrating Solar Power Linear Concentrator System Basics for Concentrating Solar Power Linear Concentrator System Basics for Concentrating Solar Power August 20, 2013 - 4:45pm Addthis Photo of numerous parallel rows of parabolic trough collectors tracking the sun. Cooling towers and other generator equipment are in the midst of the troughs, and two water tanks are in the background. The Solar Electric Generating Station IV power plant in California consists of many parallel rows of parabolic trough collectors that track the sun. The cooling towers can be seen with the water plume rising into the air, and white water tanks are in the background. Credit: Sandia National Laboratory / PIX 14955 Linear concentrating solar power (CSP) collectors capture the sun's energy with large mirrors that reflect and focus the sunlight onto a linear

3

Cross Linear Solar Concentration System for CSP and CPV  

Science Journals Connector (OSTI)

Abstract The novel concentration system, Cross Linear (CL) system has been newly invented by Tokyo Institute of Technology. From a simulation study on how cosine effect varies with latitude, declination angle, hour angle, and tan ? (the ratio of the receiver height and the distance from mirror position to the receiver position for the receiver/mirror configuration of the CL system), it was found that the cosine factor of CL system increases with an increase in the latitude. The higher cosine factor with around 0.95 in winter months is obtained by CL system even at high latitudes. The CL system can eliminate the end loss and increase the optical efficiency compared to Trough and LFR (Linear Fresnel Reflector system). This seems to solve the problems in the concentration systems of Trough and LFR; the lower concentration efficiency (lower cosine factor) in the winter months. In addition, a higher temperature around 650 °C can be obtained with the CL system, due to the high concentration degree of CL solar reflection method. Thus, the CL system can achieve both high concentration temperature and high collection efficiency in both winter and summer seasons, even at high latitudes. Therefore the CL system seems to be the only CSP system suitable for the CSP-sites at high latitudes such as Mongolia (outer and inner), southern areas of Spain and Australia, and northern area of India. Due to the promising CL system, a joint collaboration between Japanese and Indian industries, institutes and universities has been launched to build solar plant based on CL technology. Also, the CL system also seems to be applicable for the CPV, because the coma tic aberration is very small during 9am to 3pm during the sunlight duration.

Y. Tamaura; S. Shigeta; Q.-L. Meng; T. Aiba; H. Kikura

2014-01-01T23:59:59.000Z

4

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

5

Linear concentrating solar collector  

SciTech Connect

The present invention relates to a segment of a linear concentrating solar collector which includes two plates distanced from each other and extending parallel to each other; a member connects the plates to each other and holes are bored in each of the plates in a parallel manner along a parabolic curve. A member passes through the holes each holding a small strip made of a reflecting material all strips together forming a parabolic surface. The invention relates also to a collector comprising at least two of each segments and an absorber extending along the focus line of the entire collector. The collector is advantageously provided with horizontal and/or vertical members which ascertains that the collector can follow the position of the sun.

Aharon, N. B.

1985-08-06T23:59:59.000Z

6

Performance of a concentrated photovoltaic energy system with static linear Fresnel lenses  

Science Journals Connector (OSTI)

A new type of greenhouse with linear Fresnel lenses in the cover performing as a concentrated photovoltaic (CPV) system is presented. The CPV system retains all direct solar radiation, while diffuse solar radiation passes through and enters into the greenhouse cultivation system. The removal of all direct radiation will block up to 77% of the solar energy from entering the greenhouse in summer, reducing the required cooling capacity by about a factor 4. This drastically reduce the need for cooling in the summer and reduce the use of screens or lime coating to reflect or block radiation. All of the direct radiation is concentrated by a factor of 25 on a photovoltaic/thermal (PV/T) module and converted to electrical and thermal (hot water) energy. The PV/T module is kept in position by a tracking system based on two electric motors and steel cables. The energy consumption of the tracking system, ca. 0.51 W m?2, is less than 2% of the generated electric power yield. A peak power of 38 W m?2 electrical output was measured at 792 W m?2 incoming radiation and a peak power of 170 W m?2 thermal output was measured at 630 W m?2 incoming radiation of. Incoming direct radiation resulted in a thermal yield of 56% and an electric yield of 11%: a combined efficiency of 67%. The annual electrical energy production of the prototype system is estimated to be 29 kW h m?2 and the thermal yield at 518 MJ m?2. The collected thermal energy can be stored and used for winter heating. The generated electrical energy can be supplied to the grid, extra cooling with a pad and fan system and/or a desalination system. The obtained results show a promising system for the lighting and temperature control of a greenhouse system and building roofs, providing simultaneous electricity and heat. It is shown that the energy contribution is sufficient for the heating demand of well-isolated greenhouses located in north European countries.

P.J. Sonneveld; G.L.A.M. Swinkels; B.A.J. van Tuijl; H.J.J. Janssen; J. Campen; G.P.A. Bot

2011-01-01T23:59:59.000Z

7

Enhancing performance of a linear dielectric based concentrating photovoltaic system using a reflective film along the edge  

Science Journals Connector (OSTI)

Abstract In the present study, we model and analyse the performance of a dielectric based linear concentrating photovoltaic system using ray tracing and finite element methods. The results obtained are compared with the experiments. The system under study is a linear asymmetric CPC (Compound Parabolic Concentrator) designed to operate under extreme incident angles of 0° and 55° and have a geometrical concentration ratio of 2.8×. Initial experiments showed a maximum PR (power ratio) of 2.2 compared to a non concentrating counterpart. An improvement to this has been proposed and verified by adding a reflective film along the edges of the concentrator to capture the escaping rays and minimise optical losses. The addition of the reflective film changes the incoming distribution on the solar cell. Results show an increase of 16% in the average power output while using this reflective film. On including the thermal effects it was found that the overall benefit changes to about 6% while using a reflective film. Additionally, the effects of the non-uniformity of the incoming radiation are also analysed and reported for both the cases. It is found that adding the reflective film drops the maximum power at the output by only 0.5% due to the effect of non-uniformity.

Hasan Baig; Nabin Sarmah; Daniel Chemisana; Joan Rosell; Tapas K. Mallick

2014-01-01T23:59:59.000Z

8

Thermodynamic and optical analysis for a CPV/T hybrid system with beam splitter and fully tracked linear Fresnel reflector concentrator utilizing sloped panels  

Science Journals Connector (OSTI)

Abstract Spectral splitting technology that separates solar spectrum into several parts and enables different energy conversions such as photovoltaic (PV) conversion and photo-thermal conversion aims to utilize the full spectrum solar energy efficiently. A novel concentrating PV/Thermal (CPV/T) hybrid system with beam splitter and fully tracked linear Fresnel reflector concentrator utilizing sloped panels was proposed in this study. The relations between the structural parameters and the optical performances of the system were investigated. The concentrated radiation distribution on the PV device surface was simulated by taking into account the main optical errors and shows a good uniformity. Based on the experimental data of the components, thermodynamic analysis on the CPV/T hybrid system was carried out and the results reveal that the overall energy conversion efficiencies of the proposed CPV/T hybrid system is higher than that of the CPV system under the same conditions.

Yang Liu; Peng Hu; Qian Zhang; Zeshao Chen

2014-01-01T23:59:59.000Z

9

Optical performance of an azimuth tracking linear Fresnel solar concentrator  

Science Journals Connector (OSTI)

Abstracts In this paper, a linear Fresnel solar concentrator installed on a solar azimuth tracker is studied. Based on the integration of the effective source distribution for a reflection point and the whole reflector area, we develop an analytical model to calculate the intercept factor of the concentrator and analyze its performance over a year. The prediction of our analytical optical model agrees pretty well with that of the ray tracing program SolTRACE. Then we study the effects of the main design parameters on the performance of the system. The results show that annual mean total efficiency of 61% can be obtained in optimized design when the operational temperature of the receiver is 400 °C. The performance of the azimuth tracking linear Fresnel solar concentrator (ATLFSC) is compared with that of the parabolic trough collector. It is found that the cosine factor, intercept factor and total efficiency of the ATLFSC are better than those of parabolic trough collector, showing that the ATLFSC may have great potential for solar energy utilization.

Farong Huang; Longlong Li; Weidong Huang

2014-01-01T23:59:59.000Z

10

Dereverberation by linear systems techniques  

E-Print Network (OSTI)

- sentation by a finite number of thin layers and wave propagation normal to these layers. A linear, recursive mathematical model is developed and a method for the identification of parameters in the absence of noise i. , discussed. Appli ations are made...--Final System Configuration 29 16. Water Model--System Flow Diagram 17. The A Matrix 18. The B, C, and D Matrices 31 32 33 I. INTROD&JCTIO22 The removal of deleterious effects which arise in the transmission of waves through layered media is a problem...

Schell, John August

1970-01-01T23:59:59.000Z

11

Linear Concentrator System Basics for Concentrating Solar Power...  

Office of Environmental Management (EM)

towers and other generator equipment are in the midst of the troughs, and two water tanks are in the background. The Solar Electric Generating Station IV power plant in...

12

Concentrator Photovoltaic System Basics | Department of Energy  

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

Concentrator Photovoltaic System Basics Concentrator Photovoltaic System Basics Concentrator Photovoltaic System Basics August 20, 2013 - 4:12pm Addthis Concentrator photovoltaic (PV) systems use less solar cell material than other PV systems. PV cells are the most expensive components of a PV system, on a per-area basis. A concentrator makes use of relatively inexpensive materials such as plastic lenses and metal housings to capture the solar energy shining on a fairly large area and focus that energy onto a smaller area-the solar cell. One measure of the effectiveness of this approach is the concentration ratio-in other words, how much concentration the cell is receiving. Concentrator PV systems have several advantages over flat-plate systems. First, concentrator systems reduce the size or number of cells needed and

13

A comparative analysis of configurations of linear Fresnel collectors for concentrating solar power  

Science Journals Connector (OSTI)

Abstract Linear Fresnel collector arrays present some relevant advantages in the domain of concentrating solar power because of their simplicity, robustness and low capital cost. However, they also present important drawbacks and limitations, notably their average concentration ratio, which seems to limit significantly the performance of these systems. First, the paper addresses the problem of characterizing the mirror field configuration assuming hourly data of a typical year, in reference to a configuration similar to that of Fresdemo. For a proper comparative study, it is necessary to define a comparison criterion. In that sense, a new variable is defined, the useful energy efficiency, which only accounts for the radiation that impinges on the receiver with intensities above a reference value. As a second step, a comparative study between central linear Fresnel reflectors and compact linear Fresnel reflectors is carried out. This analysis shows that compact linear Fresnel reflectors minimize blocking and shading losses compared to a central configuration. However this minimization is not enough to overcome other negative effects of the compact Fresnel collectors, as the greater dispersion of the rays reaching the receiver, caused by the fact that mirrors must be located farther from the receiver, which yields to lower efficiencies.

María J. Montes; Carlo Rubbia; Rubén Abbas; José M. Martínez-Val

2014-01-01T23:59:59.000Z

14

Mirrors of dynamic curvature for linear solar concentrators  

E-Print Network (OSTI)

as heat absorber. The variation of the focus leads to a wide variation of the distribution of light 1 hal results in a non-negligeable intercept loss plus an increase in the thermal loss by the receiver. The limited concentration ratio, hence the large size of the receiver and the high thermal losses from it

Paris-Sud XI, Université de

15

General moment invariants for linear Hamiltonian systems  

Science Journals Connector (OSTI)

This paper studies the behavior of the moments of a particle distribution as it is transported through a Hamiltonian system. Functions of moments that remain invariant for an arbitrary linear Hamiltonian system are constructed. These functions remain approximately invariant for Hamiltonian systems that are not strongly nonlinear. Consequently, they can be used to characterize the degree of nonlinearity of the system.

Alex J. Dragt; Filippo Neri; Govindan Rangarajan

1992-02-15T23:59:59.000Z

16

Kinematic moment invariants for linear Hamiltonian systems  

Science Journals Connector (OSTI)

Quadratic moments of a particle distribution being transported through a linear Hamiltonian system are considered. A complete set of kinematic invariants made out of these moments are constructed leading to the discovery of new invariants.

Filippo Neri and Govindan Rangarajan

1990-03-05T23:59:59.000Z

17

MANAGEMENT INFORMATION SYSTEMS (MIS) CONCENTRATION FOR UNDERGRADUATES  

E-Print Network (OSTI)

MANAGEMENT INFORMATION SYSTEMS (MIS) CONCENTRATION FOR UNDERGRADUATES The management information systems concentration, like a major, focuses on the use of information technology for value creation creation. Link to Rensselaer 2012-2013 Catalog Required Courses MGMT 4240 Systems Analysis & Design MGMT

Salama, Khaled

18

Sandia National Laboratories: Concentrating Solar Power Systems  

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

Power Systems Air Force Research Laboratory Testing On November 2, 2012, in Concentrating Solar Power, Facilities, National Solar Thermal Test Facility, News, News & Events,...

19

Dual-range linearized transimpedance amplifier system  

DOE Patents (OSTI)

A transimpedance amplifier system is disclosed which simultaneously generates a low-gain output signal and a high-gain output signal from an input current signal using a single transimpedance amplifier having two different feedback loops with different amplification factors to generate two different output voltage signals. One of the feedback loops includes a resistor, and the other feedback loop includes another resistor in series with one or more diodes. The transimpedance amplifier system includes a signal linearizer to linearize one or both of the low- and high-gain output signals by scaling and adding the two output voltage signals from the transimpedance amplifier. The signal linearizer can be formed either as an analog device using one or two summing amplifiers, or alternately can be formed as a digital device using two analog-to-digital converters and a digital signal processor (e.g. a microprocessor or a computer).

Wessendorf, Kurt O. (Albuquerque, NM)

2010-11-02T23:59:59.000Z

20

History, current state, and future of linear Fresnel concentrating solar collectors  

Science Journals Connector (OSTI)

Abstract Linear Fresnel collectors are a type of concentrating solar power technology. In this paper, the technology’s technical features and aspects are first described via illustrations of various design concepts; then, the past low- and intermediate-temperature applications of linear Fresnel collectors are reviewed and their state-of-the-art applications in utility-scale electricity generation are presented; finally, the performance, technical challenges, and future outlook of linear Fresnel technology in the context of utility-scale power plants are summarized.

Guangdong Zhu; Tim Wendelin; Michael J. Wagner; Chuck Kutscher

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "linear concentrator 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

Solving Linear Systems of Differential Equations By MATLAB  

E-Print Network (OSTI)

Solving Linear Systems of Differential Equations By MATLAB. Consider X'=AX where A is nxn. Suppose there are n linearly independent eigenvectors for A,.

22

Linear operator inequalities for strongly stable weakly regular linear systems  

E-Print Network (OSTI)

that A has compact resolvent and its eigenvectors form a Riesz basis for the state space, we give an explicit to a spectral factorization problem and to a lin- ear quadratic optimal control problem. More concretely R, which implies that R #21; 0. The associated linear matrix inequality in the unknown self

Curtain, Ruth F.

23

Linear amplifier model for optomechanical systems  

Science Journals Connector (OSTI)

We model optomechanical systems as linear optical amplifiers. This provides a unified treatment of diverse optomechanical phenomena. We emphasize, in particular, the relationship between ponderomotive squeezing and optomechanically induced transparency, two foci of current research. We characterize the amplifier response to quantum and applied classical fluctuations, both optical and mechanical. Further, we apply these results to establish quantum limits on external force sensing both on and off cavity resonance. We find that the maximum sensitivity attained on resonance constitutes an absolute upper limit, not surpassed when detuning off cavity resonance. The theory is extended to a two-sided cavity with losses and limited detection efficiency.

Thierry Botter; Daniel W. C. Brooks; Nathan Brahms; Sydney Schreppler; Dan M. Stamper-Kurn

2012-01-09T23:59:59.000Z

24

NREL: Concentrating Solar Power Research - Systems Analysis  

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

Systems Analysis Systems Analysis Featured Resource Learn more about NREL's capabilities in modeling and analysis of CSP Systems. NREL and other national laboratories support U.S. Department of Energy (DOE) systems analysis activities to evaluate and validate the cost, performance, durability, and grid penetration impacts for concentrating solar power (CSP) technologies. DOE's systems analysis program focuses on the greatest opportunities for impact, based on estimates of the current and future costs of CSP plants, subsystems, and components. Opportunities and Potential Impact The DOE SunShot Initiative to reduce the installed cost of solar energy systems by 75% by the end of the decade will require low-cost configurations that are easy to integrate into the electric grid. Systems

25

Boundary observers for linear and quasi-linear hyperbolic systems with application to flow control  

Science Journals Connector (OSTI)

In this paper we consider the problem of boundary observer design for one-dimensional first order linear and quasi-linear strict hyperbolic systems with n rightward convecting transport PDEs. By means of Lyapunov based techniques, we derive some sufficient ... Keywords: Boundary observers, Hyperbolic systems, Infinite dimensional observer

Felipe Castillo; Emmanuel Witrant; Christophe Prieur; Luc Dugard

2013-11-01T23:59:59.000Z

26

NONEQUILIBRIUM LINEAR BEHAVIOR OF BIOLOGICAL SYSTEMS  

E-Print Network (OSTI)

-phosphorylation in mitochondria (2, 3), sodium transport in frog skin, toad bladder (4) and toad skin (5), and hydrogen ion transport in turtle bladder (6). Linearity has also been noted in a synthetic membrane exhibiting active transport (7). (Linearity as used in these papers and here implies the flow, J, is related to the force, A1

Stanley, H. Eugene

27

Abstract: Boussinesq systems -- derivation and the linear theory  

E-Print Network (OSTI)

Boussinesq equations and other systems for small-amplitude long waves in nonlinear dispersive media. Part I: derivation and the linear theory ...

28

Techno-economic Appraisal of Concentrating Solar Power Systems (CSP).  

E-Print Network (OSTI)

?? The diffusion of Concentrating Solar Power Systems (CSP) systems is currently taking place at a much slower pace than photovoltaic (PV) power systems. This… (more)

Gasti, Maria

2013-01-01T23:59:59.000Z

29

Electronic Non-Contacting Linear Position Measuring System  

DOE Patents (OSTI)

A non-contacting linear position location system employs a special transmission line to encode and transmit magnetic signals to a receiver on the object whose position is to be measured. The invention is useful as a non-contact linear locator of moving objects, e.g., to determine the location of a magnetic-levitation train for the operation of the linear-synchronous motor drive system.

Post, Richard F. (Walnut Creek, CA)

2005-06-14T23:59:59.000Z

30

Determination of Parameters of PV Concentrating System With Heliostat  

Science Journals Connector (OSTI)

The structure of PV concentrating system with heliostat is analyzed. The mathematical model of system consisting of PV concentrating module and heliostat is developed. With the use of developed mathematical model the optimal parameters of the system are determined. The results of this work can be used during the design of PV concentrating systems with heliostats.

R. Vardanyan; A. Norsoyan; V. Dallakyan

2010-01-01T23:59:59.000Z

31

Coordinated Output Regulation of Multiple Heterogeneous Linear Systems  

E-Print Network (OSTI)

, the generalizations of coordination of multiple linear dynamic systems to the cooperative output regulation problemCoordinated Output Regulation of Multiple Heterogeneous Linear Systems Ziyang Meng, Tao Yang, Dimos V. Dimarogonas, and Karl H. Johansson Abstract-- The coordinated output regulation problem

Dimarogonas, Dimos

32

Results of testing a development module of the second-generation E-Systems concentrating photovoltaic-thermal module  

SciTech Connect

An actively-cooled linear Fresnel lens concentrating photovoltaic and thermal module, designed and built by E-Systems, was tested in the Photovoltaic Advanced Systems Test Facility. Physical, electrical, and thermal characteristics of the module are presented. Module performance is characterized through the use of multiple linear regression techniques.

Harrison, T D

1982-04-01T23:59:59.000Z

33

Linear Road : benchmarking stream-based data management systems  

E-Print Network (OSTI)

This thesis describes the design, implementation, and execution of the Linear Road benchmark for stream-based data management systems. The motivation for benchmarking and the selection of the benchmark application are ...

Tibbetts, Richard S. (Richard Singleton), 1979-

2003-01-01T23:59:59.000Z

34

RF power amplifier linearity compensation for MRI systems  

E-Print Network (OSTI)

In this thesis, a polar-feedback linearization system for use with MRI RF power amplifiers was designed and simulated. The design here presented is intended to replace Analogic's (located in Peabody, Massachusetts) ...

Torres Chico, Gabriel

2010-01-01T23:59:59.000Z

35

Synthesis of linear quantum stochastic systems via quantum feedback networks  

E-Print Network (OSTI)

Recent theoretical and experimental investigations of coherent feedback control, the feedback control of a quantum system with another quantum system, has raised the important problem of how to synthesize a class of quantum systems, called the class of linear quantum stochastic systems, from basic quantum optical components and devices in a systematic way. The synthesis theory sought in this case can be naturally viewed as a quantum analogue of linear electrical network synthesis theory and as such has potential for applications beyond the realization of coherent feedback controllers. In earlier work, Nurdin, James and Doherty have established that an arbitrary linear quantum stochastic system can be realized as a cascade connection of simpler one degree of freedom quantum harmonic oscillators, together with a direct interaction Hamiltonian which is bilinear in the canonical operators of the oscillators. However, from an experimental perspective and based on current methods and technologies, direct interaction Hamiltonians are challenging to implement for systems with more than just a few degrees of freedom. In order to facilitate more tractable physical realizations of these systems, this paper develops a new synthesis algorithm for linear quantum stochastic systems that relies solely on field-mediated interactions, including in implementation of the direct interaction Hamiltonian. Explicit synthesis examples are provided to illustrate the realization of two degrees of freedom linear quantum stochastic systems using the new algorithm.

H. I. Nurdin

2009-05-06T23:59:59.000Z

36

Intelligent Control of the Linear Motor Direct Drive Feed System for CNC Machine Tools  

Science Journals Connector (OSTI)

The linear feed system directly driven by a linear motor is more and more widely used in high speed CNC machine tools. In this linear “direct drive” feed system, all mechanical transmission elements are eliminated. The linear motor’s ... Keywords: intelligent control, linear motor, direct drive, linear feed system, machine tool

Shuhong Xiao; Guangyuan Zheng; Shuquan Chen

2008-12-01T23:59:59.000Z

37

Linear assignment maps for correlated system-environment states  

SciTech Connect

Assignment maps are mathematical operators that describe initial system-environment states for open quantum systems. We re-examine the notion of assignments that account for correlations between the system and the environment and show that these maps can be made linear at the expense of giving up positivity or consistency of the map. We study the role of positivity and consistency of the map and show the effects of relaxing these. Finally, we establish a connection between the violation of the positivity of linear assignments and the no-broadcasting theorem.

Rodriguez-Rosario, Cesar A.; Aspuru-Guzik, Alan [Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts (United States); Modi, Kavan [Centre for Quantum Technologies, National University of Singapore (Singapore)

2010-01-15T23:59:59.000Z

38

State Control Design for Linear Systems with Distributed Time Delays  

E-Print Network (OSTI)

State Control Design for Linear Systems with Distributed Time Delays Daniel Gontkovic and Róbert with distributed time delays. Using an extended form of the Lyapunov- Krasovskii functional the controller design involving distributed time delays is a problem of large practical interest where intensive activity are done

Paris-Sud XI, Université de

39

Statistics of Entropy Production in Linearized Stochastic System  

E-Print Network (OSTI)

We consider a wide class of linear stochastic problems driven off the equilibrium by a multiplicative asymmetric force. The force brakes detailed balance, maintained otherwise, thus producing entropy. The large deviation function of the entropy production in the system is calculated explicitly. The general result is illustrated using an example of a polymer immersed in a gradient flow and subject to thermal fluctuations.

K. Turitsyn; M. Chertkov; V. Y. Chernyak; A. Puliafito

2007-02-20T23:59:59.000Z

40

Nonlinear Analysis of a Two DOF Piecewise Linear Aeroelastic System  

E-Print Network (OSTI)

.37) For the purpose of numerical simulations the system is presented in the following first order from 1 2 3 4, , ,x y x y x x? ?? ?? ? ? ? (2.38) 2 3eff x x? ? ? ? (2.39) 1 2 2 2 1 2 1 2 3 4 2 4 3 4 4 3 ( ) ( ) l eff l eff x x x p x x p C x x... x p x p x C ? ? ? ? ? ? ? ? ? ? ? ? ? ? (2.40) 18 2.2.2 The piecewise linear aerodynamic model Applying the same scales to the piecewise linear model and substituting into the equations of motion, the following set...

Elgohary, Tarek Adel Abdelsalam

2011-10-21T23:59:59.000Z

Note: This page contains sample records for the topic "linear concentrator 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

Chaos Pass Filter: Linear Response of Synchronized Chaotic Systems  

E-Print Network (OSTI)

The linear response of synchronized time-delayed chaotic systems to small external perturbations, i.e., the phenomenon of chaos pass filter, is investigated for iterated maps. The distribution of distances, i.e., the deviations between two synchronized chaotic units due to external perturbations on the transfered signal, is used as a measure of the linear response. It is calculated numerically and, for some special cases, analytically. Depending on the model parameters this distribution has power law tails in the region of synchronization leading to diverging moments of distances. This is a consequence of multiplicative and additive noise in the corresponding linear equations due to chaos and external perturbations. The linear response can also be quantified by the bit error rate of a transmitted binary message which perturbs the synchronized system. The bit error rate is given by an integral over the distribution of distances and is calculated analytically and numerically. It displays a complex nonmonotonic behavior in the region of synchronization. For special cases the distribution of distances has a fractal structure leading to a devil's staircase for the bit error rate as a function of coupling strength. The response to small harmonic perturbations shows resonances related to coupling and feedback delay times. A bi-directionally coupled chain of three units can completely filtered out the perturbation. Thus the second moment and the bit error rate become zero.

Steffen Zeeb; Johannes Kestler; Ido Kanter; Wolfgang Kinzel

2013-01-29T23:59:59.000Z

42

Evaluation of a heliostat tracker for linear Fresnel lens photovoltaic concentrators  

SciTech Connect

This report presents the results of an evaluation of a heliostat tracking structure used as a two-axis tracking platform for ENTECH's linear focus Fresnel lens photovoltaic collectors. The study included the installation and operation of a heliostat tracker populated with 30 modules (1 operational and 29 non-operational) on a 32-ft x 32-ft platform. Details of the array installation, collector mounting, and array tracking accuracy are provided. Test results demonstrate that the heliostat tracker meets the performance requirements imposed by the collector. The evaluation includes a comparison of the heliostat tracker approach with the current tracker approach (a roll/tilt array). Results of the comparison do not identify a clearly superior option.

Not Available

1986-12-01T23:59:59.000Z

43

Entropy Production in Non-Linear, Thermally Driven Hamiltonian Systems  

E-Print Network (OSTI)

We consider a finite chain of non-linear oscillators coupled at its ends to two infinite heat baths which are at different temperatures. Using our earlier results about the existence of a stationary state, we show rigorously that for arbitrary temperature differences and arbitrary couplings, such a system has a unique stationary state. (This extends our earlier results for small temperature differences.) In all these cases, any initial state will converge (at an unknown rate) to the stationary state. We show that this stationary state continually produces entropy. The rate of entropy production is strictly negative when the temperatures are unequal and is proportional to the mean energy flux through the system.

Jean-Pierre Eckmann; Claude-Alain Pillet; Luc Rey-Bellet

1998-10-30T23:59:59.000Z

44

Left invertibility, flatness and identifiability of switched linear dynamical systems: a framework  

E-Print Network (OSTI)

Left invertibility, flatness and identifiability of switched linear dynamical systems: a framework invertibility and flatness, dynamical systems are structurally equivalent to some specific cryptographic invertibility, flatness and identifiability of discrete- time switched linear systems are investigated

Paris-Sud XI, Université de

45

Concentrating Solar Power Thermal Storage System Basics | Department of  

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

Thermal Storage System Basics Thermal Storage System Basics Concentrating Solar Power Thermal Storage System Basics August 21, 2013 - 10:33am Addthis One challenge facing the widespread use of solar energy is reduced or curtailed energy production when the sun sets or is blocked by clouds. Thermal energy storage provides a workable solution to this challenge. In a concentrating solar power (CSP) system, the sun's rays are reflected onto a receiver, which creates heat that is used to generate electricity. If the receiver contains oil or molten salt as the heat-transfer medium, then the thermal energy can be stored for later use. This enables CSP systems to be cost-competitive options for providing clean, renewable energy. Several thermal energy storage technologies have been tested and

46

Linear Fresnel | Department of Energy  

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

Linear Fresnel systems, which are a type of linear concentrator, are active in Germany, Spain, Australia, India, and the United States. The SunShot Initiative funds R&D on...

47

Novel Approach to Linear Accelerator Superconducting Magnet System  

SciTech Connect

Superconducting Linear Accelerators include a superconducting magnet system for particle beam transportation that provides the beam focusing and steering. This system consists of a large number of quadrupole magnets and dipole correctors mounted inside or between cryomodules with SCRF cavities. Each magnet has current leads and powered from its own power supply. The paper proposes a novel approach to magnet powering based on using superconducting persistent current switches. A group of magnets is powered from the same power supply through the common, for the group of cryomodules, electrical bus and pair of current leads. Superconducting switches direct the current to the chosen magnet and close the circuit providing the magnet operation in a persistent current mode. Two persistent current switches were fabricated and tested. In the paper also presented the results of magnetic field simulations, decay time constants analysis, and a way of improving quadrupole magnetic center stability. Such approach substantially reduces the magnet system cost and increases the reliability.

Kashikhin, Vladimir; /Fermilab

2011-11-28T23:59:59.000Z

48

High-yield positron systems for linear colliders  

SciTech Connect

Linear colliders, such as the SLC, are among those accelerators for which a high-yield positron source operating at the repetition rate of the accelerator is desired. The SLC, having electron energies up to 50 GeV, presents the possibility of generating positron bunches with useful charge even exceeding that of the initial electron bunch. The exact positron yield to be obtained depends on the particular capture, transport and damping system employed. Using 31 GeV electrons impinging on a W-type converter phase-space at the target to the acceptance of the capture rf section, the SLC source is capable of producing, for every electron, up to two positrons within the acceptance of the positron damping ring. The design of this source and the performance of the positron system as built are described. Also, future prospects and limitations for high-yield positron systems are discussed. 11 refs., 5 figs., 3 tabs.

Clendenin, J.E.

1989-04-01T23:59:59.000Z

49

H? repetitive control of linear systems based on Two-Dimensional model  

Science Journals Connector (OSTI)

This paper concerns with the H? repetitive control of linear system based on Two-Dimensional (2D) system theory. First, a 2D model is established to describe the control behaviour within a repetition ... Keywords: 2D system, H-infinity repetitive control, LMI, linear matrix inequality, linear systems, stability, state feedback control

Yong-Hong Lan; Min Wu; Jin-Hua She

2009-08-01T23:59:59.000Z

50

A novel linear switched reluctance motor for railway transportation systems  

Science Journals Connector (OSTI)

This paper presents the design and realization of a new linear switched reluctance motor (LSRM) structure, especially suitable for high-speed railway systems. The new model has a double active stator configuration and provides high force for many applications with low cost. The characteristics of the LSRM are obtained by using finite element analysis (FEA) and analytical calculations. The results of the FEA and analytical calculations are presented, and compared with experimental results. In addition, a classical double-sided LSRM (DSLSRM) is modeled with the same specifications of the new motor structure and the results are compared.

Ferhat Daldaban; Nurettin Ustkoyuncu

2010-01-01T23:59:59.000Z

51

The thermodynamic dual structure of linear-dissipative driven systems  

E-Print Network (OSTI)

The spontaneous emergence of dynamical order, such as persistent currents, is sometimes argued to require principles beyond the entropy maximization of the second law of thermodynamics. I show that, for linear dissipation in the Onsager regime, current formation can be driven by exactly the Jaynesian principle of entropy maximization, suitably formulated for extended systems and nonequilibrium boundary conditions. The Legendre dual structure of equilibrium thermodynamics is also preserved, though it requires the admission of current-valued state variables, and their correct incorporation in the entropy.

Eric Smith

2005-05-02T23:59:59.000Z

52

Concentrating Solar Power Tower System Basics | Department of Energy  

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

Concentrating Solar Power Tower System Basics Concentrating Solar Power Tower System Basics Concentrating Solar Power Tower System Basics August 20, 2013 - 5:06pm Addthis In power tower concentrating solar power systems, numerous large, flat, sun-tracking mirrors, known as heliostats, focus sunlight onto a receiver at the top of a tall tower. A heat-transfer fluid heated in the receiver is used to generate steam, which, in turn, is used in a conventional turbine generator to produce electricity. Some power towers use water/steam as the heat-transfer fluid. Other advanced designs are experimenting with molten nitrate salt because of its superior heat-transfer and energy-storage capabilities. Individual commercial plants can be sized to produce up to 200 megawatts of electricity. Illustration of a power tower power plant. Sunlight is shown reflecting off a series of heliostats surrounding the tower and onto the receiver at the top of the tower. The hot heat-transfer fluid exiting from the receiver flows down the tower, into a feedwater reheater, and then into a turbine, which generates electricity that is fed into the power grid. The cool heat-transfer fluid exiting the turbine flows into a steam condenser to be cooled and sent back up the tower to the receiver.

53

SYSTEM OPTIMIZTION OF HOT WATER CONCENTRATED SOLAR THERMOELECTRIC GENERATION  

E-Print Network (OSTI)

In this report, we describe the design of a concentrated solar thermoelectric (TE) system which can provide both electricity and hot water. Today’s thermoelectric materials have a relatively low efficiency (~6 % for temperature difference across the thermoelement on the order of 300 o C). However since thermoelectrics don’t need their cold side to be near room temperature, (in another word, one can chose the particular thermoelectric material to match to the operational temperature) it is possible to use the waste heat to provide hot water and this makes the overall efficiency of the combined system to be quite high. A key factor in the optimization of the thermoelectric module is the thermal impedance matching with the incident solar radiation, and also with the hot water heat exchanger on the cold side of the thermoelectric module. We have developed an analytic model for the whole system and optimized each component in order to minimize the material cost. TE element fill factor is found to be an important parameter to optimize at low solar concentrations (generated per mass of the thermoelectric elements. Similarly the co-optimization of the microchannel heat exchanger and the TE module can be used to minimize the amount of material in the heat exchanger and the pumping power required for forced convection liquid cooling. Changing the amount of solar concentration, changes the input heat flux and this is another parameter that can be optimized in order to reduce the cost of heat exchanger (by size), the tracking requirement and the whole system. A series of design curves for different solar concentration are obtained. It is shown that the overall efficiency of the system can be more than 80 % at 200x concentration which is independent of the material ZT (TE figure-of-merit). For a material with ZThot~0.9, the electrical conversion efficiency is ~10%. For advanced materials with ZThot ~ 2.8, the electrical conversion efficiency could reach ~21%. 1.

Kazuaki Yazawa; Ali Shakouri

54

A linear time-varying simulation of the respiratory system  

E-Print Network (OSTI)

: Dr, Wesley E. Bolch A new approach to modeling the lung has been proposed by a Task Group of the ICRP. The methodology describes biokinetic transport processes such as mechanical clearance, epithelial absorption, and alveolar transport of inhaled... time-varying system of differential equations is derived to describe the concentration of inhaled radioactive material in each lung compartment. Using the simulation computer code BIODEP. Recently determined values of breathing rates, tidal volumes...

Hernandez, Oscar Renato

2012-06-07T23:59:59.000Z

55

The Lie point symmetry generators admitted by systems of linear differential equations  

Science Journals Connector (OSTI)

...1008 59 112 4 The Lie point symmetry generators admitted by systems of linear differential...existence of a basis of infinitesimal generators (as determined by Lie's algorithm...symmetry|linear system|infinitesimal generator|fibre-preserving|affine bundle...

2014-01-01T23:59:59.000Z

56

Cost Analysis of a Concentrator Photovoltaic Hydrogen Production System  

SciTech Connect

The development of efficient, renewable methods of producing hydrogen are essential for the success of the hydrogen economy. Since the feedstock for electrolysis is water, there are no harmful pollutants emitted during the use of the fuel. Furthermore, it has become evident that concentrator photovoltaic (CPV) systems have a number of unique attributes that could shortcut the development process, and increase the efficiency of hydrogen production to a point where economics will then drive the commercial development to mass scale.

Thompson, J. R.; McConnell, R. D.; Mosleh, M.

2005-08-01T23:59:59.000Z

57

Siemens Concentrated Solar Power Ltd previously Solel Solar Systems | Open  

Open Energy Info (EERE)

Siemens Concentrated Solar Power Ltd previously Solel Solar Systems Siemens Concentrated Solar Power Ltd previously Solel Solar Systems Jump to: navigation, search Name Siemens Concentrated Solar Power Ltd (previously Solel Solar Systems) Place Beit-Shemesh, Israel Zip 99107 Sector Solar Product Israel-based subsidiary manufacturing solar thermal electricity generation (STEG) components for power plants, also develops some of its own STEG projects. Coordinates 31.75°, 35° 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":31.75,"lon":35,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

58

Synthesis of general linear systems with repeated filtering in consecutive fractional Fourier domains  

Science Journals Connector (OSTI)

The optical and digital implementations of general linear systems are costly. Through several examples we show that either exact realizations or useful approximations of these systems...

Erden, M Fatih; Ozaktas, Haldun M

1998-01-01T23:59:59.000Z

59

HVAC system optimization with CO2 concentration control using genetic algorithms  

Science Journals Connector (OSTI)

This study describes the use of genetic algorithms (GAs) for operating standard HVAC systems (HVAC—heating, ventilation and air conditioning) in order to optimize performance, primarily with regard to power saving. Genetic algorithms were introduced as an instrument for solving optimization problems. Analytic optimization procedures are widely used in other fields of engineering, but they are difficult to operate within HVAC systems, because the range of the research is usually too broad, the problems are not linear but rather discontinuous, and they mostly have complex limitations. This is why for this type of system genetic algorithms are used, since they have the qualities of robustness and efficiency that are crucial for finding the optimal solution. A simulation is conducted in order to demonstrate how much power can be saved by using the suggested method of CO2 concentration control in a standard HVAC system. In addition to Matlab Simulink, the suggested method is verified with Energy software.

Velimir Congradac; Filip Kulic

2009-01-01T23:59:59.000Z

60

Evaluation of Background Mercury Concentrations in the SRS Groundwater System  

SciTech Connect

Mercury analyses associated with the A-01 Outfall have highlighted the importance of developing an understanding of mercury in the Savannah River Site groundwater system and associated surface water streams. This activity is critical based upon the fact that the EPA Ambient Water Quality Criteria (AWQC) for this constituent is 0.012mg/L, a level that is well below conventional detection limits of 0.1 to 0.2 mg/L. A first step in this process is obtained by utilizing the existing investment in groundwater mercury concentrations (20,242 records) maintained in the SRS geographical information management system (GIMS) database. Careful use of these data provides a technically defensible initial estimate for total recoverable mercury in background and contaminated SRS wells.

Looney, B.B.

1999-03-03T23:59:59.000Z

Note: This page contains sample records for the topic "linear concentrator 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

Lighting system combining daylight concentrators and an artificial source  

DOE Patents (OSTI)

A combined lighting system for a building interior includes a stack of luminescent solar concentrators (LSC), an optical conduit made of preferably optical fibers for transmitting daylight from the LSC stack, a collimating lens set at an angle, a fixture for receiving the daylight at one end and for distributing the daylight as illumination inside the building, an artificial light source at the other end of the fixture for directing artifical light into the fixture for distribution as illumination inside the building, an automatic dimmer/brightener for the artificial light source, and a daylight sensor positioned near to the LSC stack for controlling the automatic dimmer/brightener in response to the daylight sensed. The system also has a reflector positioned behind the artificial light source and a fan for exhausting heated air out of the fixture during summer and for forcing heated air into the fixture for passage into the building interior during winter.

Bornstein, Jonathan G. (Miami, FL); Friedman, Peter S. (Toledo, OH)

1985-01-01T23:59:59.000Z

62

SunShot Initiative: Linear Fresnel  

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

Linear Fresnel to someone by Linear Fresnel to someone by E-mail Share SunShot Initiative: Linear Fresnel on Facebook Tweet about SunShot Initiative: Linear Fresnel on Twitter Bookmark SunShot Initiative: Linear Fresnel on Google Bookmark SunShot Initiative: Linear Fresnel on Delicious Rank SunShot Initiative: Linear Fresnel on Digg Find More places to share SunShot Initiative: Linear Fresnel on AddThis.com... Concentrating Solar Power Systems Parabolic Trough Linear Fresnel Power Tower Dish Engine Components Competitive Awards Staff Photovoltaics Systems Integration Balance of Systems Linear Fresnel DOE funds solar research and development (R&D) in linear Fresnel systems as one of four CSP technologies aiming to meet the goals of the SunShot Initiative. Linear Fresnel systems, which are a type of linear

63

Verification of a technical system model with linear temporal logic  

Science Journals Connector (OSTI)

We consider the verification problem for an electromechanical device with a variable number of connectors and solve it with the modal logic LTL (Linear Temporal Logic). In the course of the analysis, we prove continuity and unambiguity theorems for the ...

A. N. Nepeivoda

2012-09-01T23:59:59.000Z

64

Scaled modeling and simulation of ocean wave linear generator buoy systems.  

E-Print Network (OSTI)

??Accurate scaled modeling and simulation are critical to advancing ocean wave linear generator buoys. A 100th scaled model of ocean wave generator buoy systems is… (more)

Gore, Ganesh P.

2006-01-01T23:59:59.000Z

65

Efficiency and concentration ratio measurements of fluorescent solar concentrators using a xenon measurement system  

Science Journals Connector (OSTI)

An indoor test stand for fluorescent planar concentrator–collectors (FPC) with a 1.6-kW xenon light source, irradiating a rectangular triangle (active area 400 cm2) with 82...

Heidler, K

1981-01-01T23:59:59.000Z

66

Linear Performance Indices to Predict Oscillatory Stability Problems in Power Systems  

E-Print Network (OSTI)

1 Linear Performance Indices to Predict Oscillatory Stability Problems in Power Systems Claudio A is also presented to produce a linear profile for these indices. They are based on eigenvalue and singular-induced bifurcations, the lack of steady state solutions arises from system controls reaching limits (e.g. generator

Cañizares, Claudio A.

67

MA47, a Fortran code for direct solution of indefinite sparse symmetric linear systems  

E-Print Network (OSTI)

-first search of the assembly tree ........................ 23 3.8 MA47M: calculate storage and operation countsRAL-95-001 MA47, a Fortran code for direct solution of indefinite sparse symmetric linear systems indefinite symmetric linear systems of equations. It is intended to complement the Harwell code MA27

Mihajlovic, Milan D.

68

Stabilizability of the linear algebro-differential one-input control systems  

Science Journals Connector (OSTI)

Consideration was given to the controllable system of ordinary linear differential equations with the matrix at the derivative of the desired vector function that is identically degenerate in the domain of definition. For the one-input systems, the questions ...

A. A. Shcheglova

2010-09-01T23:59:59.000Z

69

A centralized control system for ecological vehicle platooning using linear quadratic regulator theory  

Science Journals Connector (OSTI)

This paper presents an ecological vehicle platooning control system that aims in reducing overall fuel consumption of the vehicles in a platoon. A centralized linear quadratic regulator system for controlling the...

Anan Kaku; Masakazu Mukai; Taketoshi Kawabe

2012-10-01T23:59:59.000Z

70

Concentrating Solar Power Dish/Engine System Basics | Department of Energy  

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

Concentrating Solar Power Dish/Engine System Basics Concentrating Solar Power Dish/Engine System Basics Concentrating Solar Power Dish/Engine System Basics August 20, 2013 - 5:02pm Addthis The dish/engine system is a concentrating solar power (CSP) technology that produces relatively small amounts of electricity compared to other CSP technologies-typically in the range of 3 to 25 kilowatts. Dish/engine systems use a parabolic dish of mirrors to direct and concentrate sunlight onto a central engine that produces electricity. The two major parts of the system are the solar concentrator and the power conversion unit. Solar Concentrator Illustration of a dish/engine power plant. Sunlight is shown reflecting off the large dish-shaped concentrator and onto the mounted power conversion unit to generate electricity that is fed into the power grid. The system looks similar to a large satellite television receiver dish.

71

Optimal Heliostat Layout for Concentrating Solar Tower Systems  

Science Journals Connector (OSTI)

A methodology to give an optimal layout of a group of heliostats has been developed for concentrating solar tower ... the method determines an optimal configuration of a heliostat field around a tower where refle...

Motoaki Utamura; Yutaka Tamaura…

2007-01-01T23:59:59.000Z

72

Magneto-optical granulometry: on the determination of the statistics of magnetically induced particle chains in concentrated ferrofluids from linear dichroism experiments  

E-Print Network (OSTI)

An analytical theoretical model for the influence of the magnetically induced nanoparticle chaining on the linear dichroism in ferrofluids was developed. The model is based on a statistical theory for magnetic nanoparticle chaining in ferrofluids. Together with appropriate experimental approach and data processing strategy, the model grounds a magneto-optical granulometry method able to determine the magnetic field dependence of the statistics of magnetically induced particle chains in concentrated ferrofluids.

V. Socoliuc; L. B. Popescu

2014-10-09T23:59:59.000Z

73

The DOD Family of Linear Drive Coolers for Weapon Systems  

Science Journals Connector (OSTI)

The critical module of all second generation thermal imaging systems is the Standard Advanced Dewar Assembly (SADA). To meet the requirements of advanced Infrared (IR) Imaging systems of the 1990s and beyond t...

H. Dunmire; J. Shaffer

1997-01-01T23:59:59.000Z

74

Abstract: Boussinesq systems -- derivation and the linear theory  

E-Print Network (OSTI)

Boussinesq equations and other systems for small-amplitude long waves in nonlinear dispersive media. Part II: the nonlinear theory.

75

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

76

Brief Review of Linear System Theory The following information is typically covered in a course on  

E-Print Network (OSTI)

on linear system theory. At ISU, EE 577 is one such course and is highly recommended for power system and cause very large oscillations that could disrupt the system. c. with k=0, the effects of the "t for power systems. Therefore, we safely assume there are no repeated roots. #12;4 Right eigenvectors

McCalley, James D.

77

Advancing State-of-the-Art Concentrating Solar Power Systems  

Office of Energy Efficiency and Renewable Energy (EERE)

New solar receiver for CSP system leads to higher efficiency, increased durability, and reduced cost.

78

Two fusion predictors for discrete-time linear systems with different types of observations  

Science Journals Connector (OSTI)

New fusion predictors for linear dynamic systems with different types of observations are proposed. The fusion predictors are formed by summation of the ... only on time instants. The relationship between fusion ...

Ha Ryong Song; Moon Gu Jeon; Tae Sun Choi…

2009-08-01T23:59:59.000Z

79

Artificial Neural Networks for Modelling and Control of Non-Linear Systems  

Science Journals Connector (OSTI)

From the Publisher:Artificial neural networks possess several properties that make them particularly attractive for applications to modelling and control of complex non-linear systems. Among these properties are the universal approximation ability, the ...

Johan A. Suykens; J. Vandewalle; Bart L. R. de Moor

1996-01-01T23:59:59.000Z

80

INEXACT KRYLOV SUBSPACE METHODS FOR LINEAR SYSTEMS # JASPER VAN DEN ESHOF + AND GERARD L. G. SLEIJPEN #  

E-Print Network (OSTI)

INEXACT KRYLOV SUBSPACE METHODS FOR LINEAR SYSTEMS # JASPER VAN DEN ESHOF + AND GERARD L. G@math.uu.nl). 125 #12; 126 JASPER VAN DEN ESHOF AND GERARD L. G. SLEIJPEN decreases, the demands on the qualit

Sleijpen, Gerard

Note: This page contains sample records for the topic "linear concentrator 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

INEXACT KRYLOV SUBSPACE METHODS FOR LINEAR SYSTEMS JASPER VAN DEN ESHOF AND GERARD L. G. SLEIJPEN  

E-Print Network (OSTI)

INEXACT KRYLOV SUBSPACE METHODS FOR LINEAR SYSTEMS JASPER VAN DEN ESHOF AND GERARD L. G. SLEIJPEN@math.uu.nl). 125 #12;126 JASPER VAN DEN ESHOF AND GERARD L. G. SLEIJPEN decreases, the demands on the quality

Sleijpen, Gerard

82

Complex Non-Linear Modal Analysis for Mechanical Systems: Application to Turbomachinery Bladings With Friction  

E-Print Network (OSTI)

Complex Non-Linear Modal Analysis for Mechanical Systems: Application to Turbomachinery Bladings of a turbomachinery blade, with dry-friction interfaces is proposed. In the latter, an original framework

Paris-Sud XI, Université de

83

An investigation of the behavior of radioactivated surfactants in linear, unconsolidated sand systems  

E-Print Network (OSTI)

AN INVESTIGATION OF THE BEHAVIOR OF RADIOACTIVATED SURFACTANTS IN LINEAR, UNCONSOLIDATED SAND SYSTEMS A Thesis RAMON T. RIVERO Submitted to the Graduate College of the Texas A k M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE January 1964 Ma )or Sub]ect: Petroleum Engineering AN INVESTIGATION OF THE BEHAVIOR OF RADIOACTIVATFD SURFACTANTS IN LINEAR, UNCONSOLIDATED SAND SYSTEMS A Thesis by RAMON T ~ RIVERO Approved as to style and content by...

Rivero, Ramon T

2012-06-07T23:59:59.000Z

84

A Binary Linear Programming Approach for LCA System Boundary Identification  

Science Journals Connector (OSTI)

One of the very first steps in conducting life cycle assessment (LCA) is system boundaries identification. A binary ... boundary between significant and insignificant processes in a LCA study. The proposed model ...

Feri Afrinaldi; Hong-Chao Zhang…

2013-01-01T23:59:59.000Z

85

Linear Sum Assignment Algorithms for Distributed Multi-robot Systems  

E-Print Network (OSTI)

Multi-robot task assignment (allocation) involves assigning robots to tasks in order to optimize the entire team’s performances. Until now, one of the most useful non-domain-specific ways to coordinate multi-robot systems is through task allocation...

Liu, Lantao

2013-04-30T23:59:59.000Z

86

An effective tableau system for the linear time mucalculus  

E-Print Network (OSTI)

¯­calculus. It improves the system of Stirling and Walker by simplifying the success condition for a tableau conditions, and success conditions. The rules are goal­ directed; they tell, given a sequent formalizing the construction of the proof tree, which we then call a tableau. Finally, the success conditions indicate when

Bradfield, Julian

87

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System  

E-Print Network (OSTI)

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System Combined Heat and Power System by Zachary Mills Norwood Doctor of Philosophy in the Energy and Resources of analysis of Distributed Concentrating Solar Combined Heat and Power (DCS-CHP) systems is a design

California at Berkeley, University of

88

Concentrator Solar Cell Modules and Systems Developed in Japan  

Science Journals Connector (OSTI)

Dissemination of photovoltaic (PV) systems has advanced, and solar cell module production has also significantly increased in ... Japan organized by the New Energy and Industrial Technology Development Organizati...

2007-01-01T23:59:59.000Z

89

Comparative study of Non -Tracking and Low Concentrating Photovoltaic systems Using Low -Cost Reflectors.  

E-Print Network (OSTI)

??The traditional high concentrating photovoltaic systems have proved to be expensive as they use high grade silicon solar cells, highly specular reflecting materials and require… (more)

Hatwaambo, Sylvester

2012-01-01T23:59:59.000Z

90

Integration of High Efficiency Solar Cells on Carriers for Concentrating System Applications .  

E-Print Network (OSTI)

??High efficiency multi-junction (MJ) solar cells were packaged onto receiver systems. The efficiency change of concentrator cells under continuous high intensity illumination was done. Also,… (more)

Chow, Simon Ka Ming

2011-01-01T23:59:59.000Z

91

A system with a tracking concentrating heliostat for lighting underground spaces with beams of sunlight  

Science Journals Connector (OSTI)

The results of the introduction of a solar-power installation for lighting and creating light effects in an underground room using mirror-concentrating systems are described.

Zh. Z. Akhadov; A. A. Abdurakhmanov; Yu. B. Sobirov; Sh. R. Kholov…

2014-04-01T23:59:59.000Z

92

Linear hydraulic drive system for a Stirling engine  

SciTech Connect

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

Walsh, Michael M. (Schenectady, NY)

1984-02-21T23:59:59.000Z

93

Linear hydraulic drive system for a Stirling engine  

SciTech Connect

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

Walsh, M.M.

1984-02-21T23:59:59.000Z

94

Pole placement design for linear multivariable control systems  

E-Print Network (OSTI)

assignment. 4. Accuracy of the solution of FX=G. 5. Examples. IV MINIMUM NORM STATE FEEDBACK PROBLEM 1. Introduction. 2. Minimum norm algorithm. A lower bourd 4. Examples. ROBUST EIGENSTRUCTURE POLE PLACEMENT COMPENSATOR DESIGN. g 7 39 61 61 61.... 82758 4. 68965 2. 65517 L 2. 06896 -1. 72413 -3. 13793 Condition No. oi' X = 9. $0778 Closed Loop System Poles I -3 -0 99999-j. -0 99999+ii 16 B the new al orithm(A com anion form) A 0 1 0 0 0 1 -6 -8 -5 -3 ~ 2 -2 ~ 3 -0. 8 X = -7 -6. 5 ? 2 5...

Keel, Leehyun

1982-01-01T23:59:59.000Z

95

Advancing State-of-the-Art Concentrating Solar Power Systems...  

Office of Environmental Management (EM)

salt or steam, on which today's state-of-the-art CSP systems rely. The Brayton Energy design enables the use of low-cost materials and simplified manufacturing methods, leading to...

96

System for concentrating and analyzing particles suspended in a fluid  

DOE Patents (OSTI)

Disclosed is a device for separating and concentrating particles suspended in a fluid stream by using dielectrophoresis (DEP) to trap and/or deflect those particles as they migrate through a fluid channel. The method uses fluid channels designed to constrain a liquid flowing through it to uniform electrokinetic flow velocities. This behavior is achieved by connecting deep and shallow sections of channels, with the channel depth varying abruptly along an interface. By careful design of abrupt changes in specific permeability at the interface, an abrupt and spatially uniform change in electrokinetic force can be selected. Because these abrupt interfaces also cause a sharp gradient in applied electric fields, a DEP force also can be established along the interface. Depending on the complex conductivity of the suspended particles and the immersion liquid, the DEP force can controllably complement or oppose the local electrokinetic force transporting the fluid through the channel allowing for manipulation of particles suspended in the transporting liquid.

Fiechtner, Gregory J. (Bethesda, MD); Cummings, Eric B. (Livermore, CA); Singh, Anup K. (Danville, CA)

2011-04-26T23:59:59.000Z

97

On Invertibility of Switched Linear Systems L. Vu and D. Liberzon  

E-Print Network (OSTI)

On Invertibility of Switched Linear Systems L. Vu and D. Liberzon Coordinated Science Laboratory.S.A. Email: {linhvu, liberzon}@control.csl.uiuc.edu Abstract-- We address a new problem--the invertibility. In solving the invertibility problem, we introduce the concept of singular pairs for two systems. We give

Liberzon, Daniel

98

Brief Stability region for a class of open-loop unstable linear systems: Theory and application  

Science Journals Connector (OSTI)

A new method to calculate the stability region of scalar systems with one unstable pole subject to control limitations is derived and used to determine the conditions for a maximum stabilizer controller. The results are illustrated by means of two numerical ... Keywords: Constraints, Linear systems, Sliding mode, Stabilizer, Unstable

L. Scibile; B. Kouvaritakis

2000-01-01T23:59:59.000Z

99

Solar receiver heliostat reflector having a linear drive and position information system  

DOE Patents (OSTI)

A heliostat for a solar receiver system comprises an improved drive and control system for the heliostat reflector assembly. The heliostat reflector assembly is controllably driven in a predetermined way by a light-weight drive system so as to be angularly adjustable in both elevation and azimuth to track the sun and efficiently continuously reflect the sun's rays to a focal zone, i.e., heat receiver, which forms part of a solar energy utilization system, such as a solar energy fueled electrical power generation system. The improved drive system includes linear stepping motors which comprise low weight, low cost, electronic pulse driven components. One embodiment comprises linear stepping motors controlled by a programmed, electronic microprocessor. Another embodiment comprises a tape driven system controlled by a position control magnetic tape.

Horton, Richard H. (Schenectady, NY)

1980-01-01T23:59:59.000Z

100

Maps for general open quantum systems and a theory of linear quantum error correction  

E-Print Network (OSTI)

We show that quantum subdynamics of an open quantum system can always be described by a Hermitian map, irrespective of the form of the initial total system state. Since the theory of quantum error correction was developed based on the assumption of completely positive (CP) maps, we present a generalized theory of linear quantum error correction, which applies to any linear map describing the open system evolution. In the physically relevant setting of Hermitian maps, we show that the CP-map based version of quantum error correction theory applies without modifications. However, we show that a more general scenario is also possible, where the recovery map is Hermitian but not CP. Since non-CP maps have non-positive matrices in their range, we provide a geometric characterization of the positivity domain of general linear maps. In particular, we show that this domain is convex, and that this implies a simple algorithm for finding its boundary.

A. Shabani; D. A. Lidar

2009-02-14T23:59:59.000Z

Note: This page contains sample records for the topic "linear concentrator 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

Low Cost High Concentration PV Systems for Utility Power Generation Amonix,  

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

Amonix, Inc. Amonix, Inc. Low Cost High Concentration PV Systems for Utility Power Generation Amonix, Inc. A series of brief fact sheet on various topics including:Low Cost High Concentration PV Systems for Utility Power Generation,High Efficiency Concentrating Photovoltaic Power System,Reaching Grid Parity Using BP Solar Crystalline Silicon Technology, Fully Integrated Building Science Solutions for Residential and Commercial Photovoltaic Energy Generation,A Value Chain Partnership to Accelerate U.S. Photovoltaic Industry Growth,AC Module PV System,Flexible Organic Polymer-Based PV For Building Integrated Commercial Applications,Flexable Integrated PV System,Delivering Grid-Parity Solar Electricity On Flat Commercial Rooftops,Fully Automated Systems Technology, Concentrating Solar Panels: Bringing the Highest Power and Lowest Cost to

102

Network Synthesis for a Class of Mixed Quantum-Classical Linear Stochastic Systems  

E-Print Network (OSTI)

The purpose of this paper is to formulate and solve a synthesis problem for a class of linear quantum equations that may describe mixed quantum-classical systems. A general model and a standard model for mixed quantum-classical linear stochastic systems are proposed for our design processes and then we show how the former may be transformed into the latter, which can clearly present the internal structure of a mixed quantum-classical system. Physical realizability conditions are derived separately for the two models to ensure that they can correspond to physical systems. Furthermore, a network synthesis theory is developed for a mixed quantum-classical system of the standard form and an example is given to illustrate the theory.

Shi Wang; Hendra I. Nurdin; Guofeng Zhang; Matthew R. James

2014-03-27T23:59:59.000Z

103

LINEAR STABILITY ANALYSIS FOR PERIODIC TRAVELING WAVES OF THE BOUSSINESQ EQUATION AND THE KGZ SYSTEM  

E-Print Network (OSTI)

LINEAR STABILITY ANALYSIS FOR PERIODIC TRAVELING WAVES OF THE BOUSSINESQ EQUATION AND THE KGZ stability of spatially periodic waves for the Boussinesq equa- tion (the cases p = 2, 3) and the Klein interest will be mainly in two PDE - the Boussinesq equation and the Klein-Gordon-Zakharov system, although

Stanislavova, Milena

104

LINEAR STABILITY ANALYSIS FOR PERIODIC TRAVELING WAVES OF THE BOUSSINESQ EQUATION AND THE KGZ SYSTEM  

E-Print Network (OSTI)

LINEAR STABILITY ANALYSIS FOR PERIODIC TRAVELING WAVES OF THE BOUSSINESQ EQUATION AND THE KGZ stability of spatially periodic waves for the Boussinesq equa- tion (the cases p = 2, 3) and the Klein in two PDEs - the Boussinesq equation and the Klein-Gordon-Zakharov system, although the methods that we

Stanislavova, Milena

105

Parallel NonLinear Optimization : Towards The Design Of A Decision Support System For Air  

E-Print Network (OSTI)

outcomes (e.g. financial return) whilst minimizing environmental damage. In the area of air pollution, such technology has been used for real world studies predicting air pollution levels over a planning horizon1 Parallel Non­Linear Optimization : Towards The Design Of A Decision Support System For Air

Abramson, David

106

Rank Tests for the Observability of Discrete-Time Jump Linear Systems with Inputs  

E-Print Network (OSTI)

Rank Tests for the Observability of Discrete-Time Jump Linear Systems with Inputs Ehsan Elhamifar of rank tests on the parameters of the JLS when the discrete state sequence is arbitrary. Our key verify observ- ability by checking a number of rank tests that is only quadratic in the number

107

1. Consider the following linear dynarnical system X = A X + B U  

E-Print Network (OSTI)

1. Consider the following linear dynarnical system X = A X + B U Y = C X (i) Please statethe-looptracking transfer function. (4) Find the steady-state value of outputx due to: (a) unit-step load force disturbace change; (b) unit-ramp load force disturbancechange. Controller Motor drive model #12;3. Consider

Huang, Haimei

108

Gamification of Joint Student/System Control Over Problem Selection in a Linear Equation Tutor  

E-Print Network (OSTI)

Gamification of Joint Student/System Control Over Problem Selection in a Linear Equation Tutor gamification features in ITSs has become a popular theme in ITSs research. This work focuses on gamification for incorporating gamification features in ITSs. Keywords: DragonBox, educational games, student control, shared

Mankoff, Jennifer

109

LINEAR TIME PERIODIC MODELLING OF POWER ELECTRONIC DEVICES FOR POWER SYSTEM HARMONIC ANALYSIS AND SIMULATION  

E-Print Network (OSTI)

LINEAR TIME PERIODIC MODELLING OF POWER ELECTRONIC DEVICES FOR POWER SYSTEM HARMONIC ANALYSIS by simulation. 1. INTRODUCTION The variety and the wide spread use of power electronic devices in the power networks is due to their diverse and multiple functions: compensation, protection and interface

Boyer, Edmond

110

Inexact range-space Krylov solvers for linear systems arising from inverse problems  

E-Print Network (OSTI)

is crucial in data assimilation appli- cations and other inverse problems. Secondly, it is shown.1) and methods of the type we just men- tioned finds its origin in (but is not limited by) the data assimilation. Keywords: Krylov methods, linear systems, inexact matrix products, data assimila- tion. 1 Introduction

Toint, Philippe

111

Brief paper: Risk-sensitive filtering for jump Markov linear systems  

Science Journals Connector (OSTI)

In this paper, a risk-sensitive multiple-model filtering algorithm is derived using the reference probability methods. First, the approximation of the interacting multiple-model (IMM) algorithm is identified in the reference probability domain. Then, ... Keywords: IMM, Jump Markov linear system, Multiple-model estimation, Risk-sensitive estimation

Umut Orguner; Mübeccel Demirekler

2008-01-01T23:59:59.000Z

112

Minimax design of vibration absorbers for linear damped systems Brandon Brown, Tarunraj Singh  

E-Print Network (OSTI)

Minimax design of vibration absorbers for linear damped systems Brandon Brown, Tarunraj Singh Ã? addresses the issue of design of a passive vibration absorber in the presence of uncertainties in the forcing frequency. A minimax problem is formulated to determine the parameters of a vibration absorber

Singh, Tarunraj

113

Tuning the plasmon energy of Palladium-Hydrogen systems by varying the Hydrogen concentration  

E-Print Network (OSTI)

to their importance in many applications such as hydrogen storage [16, 17, 18, 19, 20, 21]. The novel scheme [8Tuning the plasmon energy of Palladium-Hydrogen systems by varying the Hydrogen concentration V M of bulk PdHx. Hydrogen concentrations between x = 0 and x = 1 are considered. The calculated spectra

Muiño, Ricardo Díez

114

Study Of a Solar Trough Concentrating System for Application of Solar Energy Refrigeration  

Science Journals Connector (OSTI)

A solar concentrating trough device has been constructed for further application of solar heating and power system or solar refrigeration. A model for both evacuated tube and copper tube heated by solar trough co...

Li Ming; Wang Liuling; Zhou Xizheng…

2009-01-01T23:59:59.000Z

115

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System  

E-Print Network (OSTI)

to be more suited to solar thermal energy sources. Airunit of solar thermal and solar electric energy from a DCS-concentrating solar systems is indeed thermal energy. There

Norwood, Zachary Mills

2011-01-01T23:59:59.000Z

116

Optical and thermodynamic analysis and optimization of a novel solar concentrating system for distributed power generation.  

E-Print Network (OSTI)

??A novel central receiver power system utilizing linked-tracking heliostats is analyzed for distributed-scale concentrated solar power. Smaller linkage groupings are typically found to have a… (more)

Dunham, Marc Tyler Deo

2012-01-01T23:59:59.000Z

117

Modeling of Performance, Cost, and Financing of Concentrating Solar, Photovoltaic, and Solar Heat Systems (Poster)  

SciTech Connect

This poster, submitted for the CU Energy Initiative/NREL Symposium on October 3, 2006 in Boulder, Colorado, discusses the modeling, performance, cost, and financing of concentrating solar, photovoltaic, and solar heat systems.

Blair, N.; Mehos, M.; Christiansen, C.

2006-10-03T23:59:59.000Z

118

Is linear response to x-rays suitable for digital dental x-ray imaging systems? —Theoretical and experimental considerations  

Science Journals Connector (OSTI)

The purpose of this study was to consider theoretically and experimentally the suitability of linear response to x-rays for digital dental x-ray imaging systems.

Keiichi Nishikawa PhD; Mamoru Wakoh DDS; PhD; Kinya Kuroyanagi DDS; PhD

2003-06-01T23:59:59.000Z

119

Optimal steering of a linear stochastic system to a final probability distribution  

E-Print Network (OSTI)

We consider the problem to steer a linear dynamical system with full state observation from an initial gaussian distribution in state-space to a final one with minimum energy control. The system is stochastically driven through the control channels; an example for such a system is that of an inertial particle experiencing random "white noise" forcing. We show that a target probability distribution can always be achieved in finite time. The optimal control is given in state-feedback form and is computed explicitely by solving a pair of differential Lyapunov equations that are coupled through their boundary values. This result, given its attractive algorithmic nature, appears to have several potential applications such as to active control of nanomechanical systems and molecular cooling. The problem to steer a diffusion process between end-point marginals has a long history (Schr\\"odinger bridges) and therefore, the present case of steering a linear stochastic system constitutes a Schr\\"odinger bridge for possibly degenerate diffusions. Our results, however, provide the first implementable form of the optimal control for a general Gauss-Markov process. Illustrative examples of the optimal evolution and control for inertial particles and a stochastic oscillator are provided. A final result establishes directly the property of Schr\\"{o}dinger bridges as the most likely random evolution between given marginals to the present context of linear stochastic systems.

Yongxin Chen; Tryphon Georgiou; Michele Pavon

2014-08-10T23:59:59.000Z

120

Research and Development for Novel Thermal Energy Storage Systems (TES) for Concentrating Solar Power (CSP)  

SciTech Connect

The overall objective was to develop innovative heat transfer devices and methodologies for novel thermal energy storage systems for concentrating solar power generation involving phase change materials (PCMs). Specific objectives included embedding thermosyphons and/or heat pipes (TS/HPs) within appropriate phase change materials to significantly reduce thermal resistances within the thermal energy storage system of a large-scale concentrating solar power plant and, in turn, improve performance of the plant. Experimental, system level and detailed comprehensive modeling approaches were taken to investigate the effect of adding TS/HPs on the performance of latent heat thermal energy storage (LHTES) systems.

Faghri, Amir; Bergman, Theodore L; Pitchumani, Ranga

2013-09-26T23:59:59.000Z

Note: This page contains sample records for the topic "linear concentrator 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

Experimental Validation of a Numerical Controller Using Convex Optimization with Linear Matrix Inequalities on a Quarter-Car Suspension System  

E-Print Network (OSTI)

of the transfer function from the road disturbance to the actuating effort with the change in the sprung mass of the quarter-car system. The quarter-car system makes use of a linear brushless permanent magnet motor (LBPMM) as an actuator, a linear variable...

Chintala, Rohit

2012-10-19T23:59:59.000Z

122

Coherent anti-stokes Raman spectroscopy system for point temperature and major species concentration measurement  

SciTech Connect

The Coherent anti-Stokes Raman Spectroscopy system (CARS) has been developed as a laser-based, advanced, combustion-diagnostic technique to measure temperature and major species concentration. Principles of operation, description of the system and its capabilities, and operational details of this instrument are presented in this report.

Singh, J.P.; Yueh, Fang-Yu

1993-10-01T23:59:59.000Z

123

ANGEL program: Solution of large systems of linear differential equations describing nonstationary processes using CUDA technology  

SciTech Connect

This paper presents the formulation of the problem and the methodical approach for solving large systems of linear differential equations describing nonstationary processes with the use of CUDA technology; this approach is implemented in the ANGEL program. Results for a test problem on transport of radioactive products over loops of a nuclear power plant are given. The possibilities for the use of the ANGEL program for solving various problems that simulate arbitrary nonstationary processes are discussed.

Moryakov, A. V., E-mail: sailor@yauza.ru; Pylyov, S. S. [National Research Centre Kurchatov Institute (Russian Federation)

2012-12-15T23:59:59.000Z

124

Linearization of dose-response curve of the radiochromic film dosimetry system  

SciTech Connect

Purpose: Despite numerous advantages of radiochromic film dosimeter (high spatial resolution, near tissue equivalence, low energy dependence) to measure a relative dose distribution with film, one needs to first measure an absolute dose (following previously established reference dosimetry protocol) and then convert measured absolute dose values into relative doses. In this work, we present result of our efforts to obtain a functional form that would linearize the inherently nonlinear dose-response curve of the radiochromic film dosimetry system. Methods: Functional form [{zeta}= (-1){center_dot}netOD{sup (2/3)}/ln(netOD)] was derived from calibration curves of various previously established radiochromic film dosimetry systems. In order to test the invariance of the proposed functional form with respect to the film model used we tested it with three different GAFCHROMIC Trade-Mark-Sign film models (EBT, EBT2, and EBT3) irradiated to various doses and scanned on a same scanner. For one of the film models (EBT2), we tested the invariance of the functional form to the scanner model used by scanning irradiated film pieces with three different flatbed scanner models (Epson V700, 1680, and 10000XL). To test our hypothesis that the proposed functional argument linearizes the response of the radiochromic film dosimetry system, verification tests have been performed in clinical applications: percent depth dose measurements, IMRT quality assurance (QA), and brachytherapy QA. Results: Obtained R{sup 2} values indicate that the choice of the functional form of the new argument appropriately linearizes the dose response of the radiochromic film dosimetry system we used. The linear behavior was insensitive to both film model and flatbed scanner model used. Measured PDD values using the green channel response of the GAFCHROMIC Trade-Mark-Sign EBT3 film model are well within {+-}2% window of the local relative dose value when compared to the tabulated Cobalt-60 data. It was also found that criteria of 3%/3 mm for an IMRT QA plan and 3%/2 mm for a brachytherapy QA plan are passing 95% gamma function points. Conclusions: In this paper, we demonstrate the use of functional argument to linearize the inherently nonlinear response of a radiochromic film based reference dosimetry system. In this way, relative dosimetry can be conveniently performed using radiochromic film dosimetry system without the need of establishing calibration curve.

Devic, Slobodan; Tomic, Nada; Aldelaijan, Saad; DeBlois, Francois; Seuntjens, Jan; Chan, Maria F.; Lewis, Dave [Medical Physics Unit, McGill University, Montreal, Quebec H3G 1A4 (Canada) and Department of Radiation Oncology, SMBD Jewish General Hospital, McGill University, Montreal, Quebec H3T 1E2 (Canada); Executive Administration for Radiation Protection and Safety Medical Devices Sector, Saudi Food and Drug Authority, Riyadh, Kingdom of Saudi Arabia 13312 (Saudi Arabia); Medical Physics Unit, McGill University, Montreal, Quebec H3G 1A4 (Canada) and Department of Radiation Oncology, SMBD Jewish General Hospital, McGill University, Montreal, Quebec H3T 1E2 (Canada); Medical Physics Unit, McGill University, Montreal, Quebec H3G 1A4 (Canada); Department of Medical Physics, Memorial Sloan-Kettering Cancer Center Basking Ridge, New Jersey 07920 (United States); Ashland Inc., Wayne, New Jersey 07470 (United States)

2012-08-15T23:59:59.000Z

125

Molten Salt-Carbon Nanotube Thermal Energy Storage for Concentrating Solar Power Systems  

Office of Scientific and Technical Information (OSTI)

Molten Salt-Carbon Nanotube Thermal Energy Storage for Concentrating Solar Power Systems Molten Salt-Carbon Nanotube Thermal Energy Storage for Concentrating Solar Power Systems Final Report March 31, 2012 Michael Schuller, Frank Little, Darren Malik, Matt Betts, Qian Shao, Jun Luo, Wan Zhong, Sandhya Shankar, Ashwin Padmanaban The Space Engineering Research Center Texas Engineering Experiment Station Texas A&M University Abstract We demonstrated that adding nanoparticles to a molten salt would increase its utility as a thermal energy storage medium for a concentrating solar power system. Specifically, we demonstrated that we could increase the specific heat of nitrate and carbonate salts containing 1% or less of alumina nanoparticles. We fabricated the composite materials using both evaporative and air drying methods. We tested several thermophysical properties of the composite materials,

126

Linear motor drive system for continuous-path closed-loop position control of an object  

DOE Patents (OSTI)

A precision numerical controlled servo-positioning system is provided for continuous closed-loop position control of a machine slide or platform driven by a linear-induction motor. The system utilizes filtered velocity feedback to provide system stability required to operate with a system gain of 100 inches/minute/0.001 inch of following error. The filtered velocity feedback signal is derived from the position output signals of a laser interferometer utilized to monitor the movement of the slide. Air-bearing slides mounted to a stable support are utilized to minimize friction and small irregularities in the slideway which would tend to introduce positioning errors. A microprocessor is programmed to read command and feedback information and converts this information into the system following error signal. This error signal is summed with the negative filtered velocity feedback signal at the input of a servo amplifier whose output serves as the drive power signal to the linear motor position control coil.

Barkman, William E. (Oak Ridge, TN)

1980-01-01T23:59:59.000Z

127

Self-consistent field theory based molecular dynamics with linear system-size scaling  

SciTech Connect

We present an improved field-theoretic approach to the grand-canonical potential suitable for linear scaling molecular dynamics simulations using forces from self-consistent electronic structure calculations. It is based on an exact decomposition of the grand canonical potential for independent fermions and does neither rely on the ability to localize the orbitals nor that the Hamilton operator is well-conditioned. Hence, this scheme enables highly accurate all-electron linear scaling calculations even for metallic systems. The inherent energy drift of Born-Oppenheimer molecular dynamics simulations, arising from an incomplete convergence of the self-consistent field cycle, is circumvented by means of a properly modified Langevin equation. The predictive power of the present approach is illustrated using the example of liquid methane under extreme conditions.

Richters, Dorothee [Institute of Mathematics and Center for Computational Sciences, Johannes Gutenberg University Mainz, Staudinger Weg 9, D-55128 Mainz (Germany)] [Institute of Mathematics and Center for Computational Sciences, Johannes Gutenberg University Mainz, Staudinger Weg 9, D-55128 Mainz (Germany); Kühne, Thomas D., E-mail: kuehne@uni-mainz.de [Institute of Physical Chemistry and Center for Computational Sciences, Johannes Gutenberg University Mainz, Staudinger Weg 7, D-55128 Mainz (Germany); Technical and Macromolecular Chemistry, University of Paderborn, Warburger Str. 100, D-33098 Paderborn (Germany)

2014-04-07T23:59:59.000Z

128

Photovoltaic concentrator initiative: Concentrator cell development  

SciTech Connect

This project involves the development of a large-area, low-cost, high-efficiency concentrator solar cell for use in the Entech 22-sun linear-focus Fresnel lens concentrator system. The buried contact solar cell developed at the University of New South Wales was selected for this project. Both Entech and the University of New South Wales are subcontractors. This annual report presents the program efforts from November 1990 through December 1991, including the design of the cell, development of a baseline cell process, and presentation of the results of preliminary cell processing. Important results include a cell designed for operation in a real concentrator system and substitution of mechanical grooving for the previously utilized laser scribing.

Wohlgemuth, J.H.; Narayanan, S. [Solarex Corp., Frederick, MD (US)

1993-05-01T23:59:59.000Z

129

Analysis and Design of a High Power Density Axial Flux Permanent Magnet Linear Synchronous Machine Used for Stirling System  

Science Journals Connector (OSTI)

a high power density axial flux permanent magnet linear synchronous machine and the stirling system will be introduced. This machine is a tubular axial flux permanent magnet machine. It comprises two parts: stator and mover. With the 2D finite-element ... Keywords: permanent magnet, stirling engine, linear motor

Ping Zheng; Xuhui Gan; Lin Li

2010-09-01T23:59:59.000Z

130

Tarn Yates, Senior Thesis, Physics Department UCSC Summer 2003 Solar Cells in Concentrating Systems  

E-Print Network (OSTI)

. This is because the cost of solar panels compared to the amount of power they produce makes their purchaseTarn Yates, Senior Thesis, Physics Department UCSC Summer 2003 Solar Cells in Concentrating Systems Introduction 2 Theory i. The p-n junction. 6 ii. The p-n junction under an applied bias. 7 iii. Solar cell

131

PCB Concentration in Fish in a River System after Remediation of Contaminated Sediment  

Science Journals Connector (OSTI)

An 1991 investigation of PCB concentrations in water and fish along a river was repeated in 1996 after the completion of a remediation of PCB-containing sediment in a lake within the river system. ... The results indicated, that changes in background exposure must be taken into account when evaluating the success of remedial actions measures carried out over several years. ...

Gudrun Bremle; Per Larsson

1998-09-30T23:59:59.000Z

132

Resurgence, Stokes phenomenon and alien derivatives for level-one linear differential systems  

E-Print Network (OSTI)

A precise description of the singularities of the Borel transform of solutions of a level-one linear differential system is deduced from a proof of the summable-resurgence of the solutions by the perturbative method of J. \\'Ecalle. Then we compare the meromorphic classification (Stokes phenomenon) from the viewpoint of the Stokes cocycle and the viewpoint of alien derivatives. We make explicit the Stokes-Ramis matrices as functions of the connection constants in the Borel plane and we develop two examples. No assumption of genericity is made.

Loday-Richaud, Michèle

2010-01-01T23:59:59.000Z

133

Application of convolution theory for solving non-linear flow problems: gas flow systems  

E-Print Network (OSTI)

. . . . . . . . . . . . 15 3. 2. 1 Generalized Analytical Solution for Real Gas Systems . . . . . . . . 15 3. 2. 2 Dry Gas Material Balance Relations: P(tn) - g(u) Identity. . . . . . 16 3. 3 Functional and Numerical Data Models for the Non-Linear CHAPTER IV Component... 5 4. 6 4. 7 4. 8 4. 9 Numerical Model for the (/igcg);/(/tgcg) Data Function Based on Roumboutsos and Stewart Algorithm for Transforming Data into the Laplace Domain. . (p;cg, )/(peg) Versus (p/zj/(p, /z;) (y?= 0. 7 (air = 1. 0), T = 50 'F...

Mireles, Thomas Joseph

2012-06-07T23:59:59.000Z

134

Output-Only Modal Analysis of Linear Time Periodic Systems with Application to Wind Turbine Simulation Data  

Science Journals Connector (OSTI)

Many important systems, such as turbomachinery, helicopters and wind turbines, must be modeled with linear time ... predict resonance phenomena. Time periodic effects in wind turbines might arise due to stratific...

Matthew S. Allen; Michael W. Sracic…

2011-01-01T23:59:59.000Z

135

Linear maps preserving maximal deviation and the Jordan structure of quantum systems  

SciTech Connect

In the algebraic approach to quantum theory, a quantum observable is given by an element of a Jordan algebra and a state of the system is modelled by a normalized positive functional on the underlying algebra. Maximal deviation of a quantum observable is the largest statistical deviation one can obtain in a particular state of the system. The main result of the paper shows that each linear bijective transformation between JBW algebras preserving maximal deviations is formed by a Jordan isomorphism or a minus Jordan isomorphism perturbed by a linear functional multiple of an identity. It shows that only one numerical statistical characteristic has the power to determine the Jordan algebraic structure completely. As a consequence, we obtain that only very special maps can preserve the diameter of the spectra of elements. Nonlinear maps preserving the pseudometric given by maximal deviation are also described. The results generalize hitherto known theorems on preservers of maximal deviation in the case of self-adjoint parts of von Neumann algebras proved by Molnar.

Hamhalter, Jan [Department of Mathematics, Faculty of Electrical Engineering, Czech Technical University in Prague, Technicka 2, 166 27 Prague 6 (Czech Republic)

2012-12-15T23:59:59.000Z

136

Electronic film with embedded micro-mirrors for solar energy concentrator systems  

E-Print Network (OSTI)

A novel electronic film solar energy concentrator with embedded micro-mirrors that track the sun is described. The potential viability of this new concept is presented. Due to miniaturization, the amount of material needed for the optical system is minimal. Because it is light-weight and flexible, it can easily be attached to the land or existing structures. This presents an economic advantage over conventional concentrators which require the construction of a separate structure to support them, and motors to orient them to intercept and properly reflect sunlight. Such separate structures must be able to survive gusts, windstorms, earthquakes, etc. This concentrator utilizes the ground or existing edifices which are already capable of withstanding such vicissitudes of nature.

Mario Rabinowitz; Mark Davidson

2004-04-16T23:59:59.000Z

137

Electronic film with embedded micro-mirrors for solar energy concentrator systems  

E-Print Network (OSTI)

A novel electronic film solar energy concentrator with embedded micro-mirrors that track the sun is described. The potential viability of this new concept is presented. Due to miniaturization, the amount of material needed for the optical system is minimal. Because it is light-weight and flexible, it can easily be attached to the land or existing structures. This presents an economic advantage over conventional concentrators which require the construction of a separate structure to support them, and motors to orient them to intercept and properly reflect sunlight. Such separate structures must be able to survive gusts, windstorms, earthquakes, etc. This concentrator utilizes the ground or existing edifices which are already capable of withstanding such vicissitudes of nature.

Rabinowitz, M; Rabinowitz, Mario; Davidson, Mark

2004-01-01T23:59:59.000Z

138

Effect of geometry on concentration polarization in realistic heterogeneous permselective systems  

E-Print Network (OSTI)

This study extends previous analytical solutions of concentration-polarization occurring solely in the depleted region, to the more realistic geometry consisting of a three dimensional (3D) heterogeneous ion-permselective medium connecting two opposite microchambers (i.e. 3 layers system). Under the local electro-neutrality approximation, the separation of variable methods is used to derive an analytical solution of the electro-diffusive problem for the two opposing asymmetric microchambers. Assuming an ideal permselective medium allows for the analytic calculation of the 3D concentration and electric potential distributions as well as a current-voltage relation. It is shown that any asymmetry in the microchamber geometries will result in current rectification. Moreover, it is demonstrated that for non-negligible microchamber resistances the conductance does not exhibit the expected saturation at low concentrations but instead shows a continuous decrease. The results are intended to facilitate a more direct c...

Green, Yoav; Yossifon, Gilad

2014-01-01T23:59:59.000Z

139

Improving the energy efficiency of sparse linear system solvers on multicore and manycore systems  

Science Journals Connector (OSTI)

...impacting their performance. high performance computing|energy efficiency|sparse...about the energy draw by high performance computing (HPC) facilities, the...new metric for ranking high performance computing systems. Sandia report...

2014-01-01T23:59:59.000Z

140

Thermal energy storage technologies and systems for concentrating solar power plants  

Science Journals Connector (OSTI)

This paper presents a review of thermal energy storage system design methodologies and the factors to be considered at different hierarchical levels for concentrating solar power (CSP) plants. Thermal energy storage forms a key component of a power plant for improvement of its dispatchability. Though there have been many reviews of storage media, there are not many that focus on storage system design along with its integration into the power plant. This paper discusses the thermal energy storage system designs presented in the literature along with thermal and exergy efficiency analyses of various thermal energy storage systems integrated into the power plant. Economic aspects of these systems and the relevant publications in literature are also summarized in this effort.

Sarada Kuravi; Jamie Trahan; D. Yogi Goswami; Muhammad M. Rahman; Elias K. Stefanakos

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "linear concentrator 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

Energy Department Announces New University-Led Projects to Create More Efficient, Lower Cost Concentrating Solar Power Systems  

Office of Energy Efficiency and Renewable Energy (EERE)

As part of the Energy Department’s SunShot Initiative, Secretary Steven Chu announced today new investments to advance innovative concentrating solar power (CSP) system technologies.

142

MONGA, GEISLER, AND EVANS: HUMAN VISUAL SYSTEM MODELS 1 Linear, Color Separable, Human Visual System  

E-Print Network (OSTI)

does not have perceptual meaning in Authors are with the Center for Perceptual Systems, The University space where Eu- clidean distance has perceptual meaning. This paper eval- uates color spaces for vector error lter optimization. In order of increasing quality, the color spaces are YIQ, YUV, opponent

Evans, Brian L.

143

Microfluidic system with integrated electroosmotic pumps, concentration gradient generator and fish cell line (RTgill-W1)--towards water toxicity  

E-Print Network (OSTI)

Microfluidic system with integrated electroosmotic pumps, concentration gradient generator and fish that incorporates electroosmotic pumps, a concentration gradient generator and a fish cell line (rainbow trout gill concentration distribution of toxicant in a cell test chamber, (2) an electroosmotic (EO) pump chip

Le Roy, Robert J.

144

Reliability-based synthesis of non-linear stochastic dynamical systems: a global approximation approach  

Science Journals Connector (OSTI)

The paper presents an efficient methodology to carry out reliability-based structural optimisation of non-linear systems under stochastic loading. The optimisation problem is formulated as the minimisation of an objective function subject to multiple reliability constraints. The reliability constraints are given in terms of first excursion probabilities with large state-space dimensions. A sequential approximate optimisation scheme based on global approximations of the reliability constraints is implemented in the proposed formulation. The approximations of the first excursion probabilities in terms of the design variables are constructed by combining a global mixed linearisation approach with a reliability sensitivity analysis. The sensitivity of the first excursion probabilities are estimated by considering some statistics of an augmented reliability problem. The number of reliability estimations required during the optimal design process is generally very small. Two numerical examples are presented to illustrate the effectiveness of the method.

Hector A. Jensen; Macarena S. Ferre; Danilo S. Kusanovic

2010-01-01T23:59:59.000Z

145

A comparative study of the peripheral doses from a linear accelerator with a multileaf collimator system  

Science Journals Connector (OSTI)

......Oncor Impression linear accelerator on its 6-MV photon...libraries (Evaluated Nuclear Data Files, version...The head included the vacuum envelope assembly for...photon beams on a linear accelerator with multileaf collimator...Peripheral dose from a linear accelerator equipped with multileaf......

Hediye Acun; Ali Zubaroglu; Gönül Kemikler; Ahmet Bozkurt

2014-02-01T23:59:59.000Z

146

A linear MOSFET regulation system to improve the performance of the booster-ramping power supplies at the APS.  

SciTech Connect

The APS booster ring uses ramping power supplies to power the sextupole, quadrupole, and dipole magnets as the beam energy ramps up linearly to 7 GeV. Due to the circuit topology used, those supplies are unable to follow the linear ramp to the desired accuracy. The best regulation achieved is 0.5% while 0.1 % is desired. In addition to the unsatisfying regulation, those supplies are sensitive to AC line perturbations and are not able to reject AC line noises higher than a few tens of Hertz. To improve the performance, a linear MOSFET regulation system using paralleled MOSFET devices in series with the power supply is proposed. The system uses a real-time current feedback loop to force the MOSFETs to work in the linear operation mode. By using this linear MOSFET regulator, the voltage drop on MOSFETs, and hence the voltage imposed on magnets, can be regulated very quickly. As a result, the regulation of the magnet current can be improved significantly. Experiments and simulation have been performed to verify the proposed method. Results show that, with the linear regulator, the current regulation can be improved to better than 0.1%. Because of the high bandwidth of the linear regulator, it can reduce the harmonic content in the output current as well as reject the AC line disturbance.

Feng, G.; Deriy, B.; Wang, J.; Shang, H.; Xu, S.

2008-01-01T23:59:59.000Z

147

Effect of geometry on concentration polarization in realistic heterogeneous permselective systems  

E-Print Network (OSTI)

This study extends previous analytical solutions of concentration-polarization occurring solely in the depleted region, to the more realistic geometry consisting of a three dimensional (3D) heterogeneous ion-permselective medium connecting two opposite microchambers (i.e. 3 layers system). Under the local electro-neutrality approximation, the separation of variable methods is used to derive an analytical solution of the electro-diffusive problem for the two opposing asymmetric microchambers. Assuming an ideal permselective medium allows for the analytic calculation of the 3D concentration and electric potential distributions as well as a current-voltage relation. It is shown that any asymmetry in the microchamber geometries will result in current rectification. Moreover, it is demonstrated that for non-negligible microchamber resistances the conductance does not exhibit the expected saturation at low concentrations but instead shows a continuous decrease. The results are intended to facilitate a more direct comparison between theory and experiments as now the voltage drop is across a realistic 3D and 3-layer system.

Yoav Green; Shahar Shloush; Gilad Yossifon

2014-06-18T23:59:59.000Z

148

Direct-Steam Linear Fresnel Performance Model for NREL's System Advisor Model  

SciTech Connect

This paper presents the technical formulation and demonstrated model performance results of a new direct-steam-generation (DSG) model in NREL's System Advisor Model (SAM). The model predicts the annual electricity production of a wide range of system configurations within the DSG Linear Fresnel technology by modeling hourly performance of the plant in detail. The quasi-steady-state formulation allows users to investigate energy and mass flows, operating temperatures, and pressure drops for geometries and solar field configurations of interest. The model includes tools for heat loss calculation using either empirical polynomial heat loss curves as a function of steam temperature, ambient temperature, and wind velocity, or a detailed evacuated tube receiver heat loss model. Thermal losses are evaluated using a computationally efficient nodal approach, where the solar field and headers are discretized into multiple nodes where heat losses, thermal inertia, steam conditions (including pressure, temperature, enthalpy, etc.) are individually evaluated during each time step of the simulation. This paper discusses the mathematical formulation for the solar field model and describes how the solar field is integrated with the other subsystem models, including the power cycle and optional auxiliary fossil system. Model results are also presented to demonstrate plant behavior in the various operating modes.

Wagner, M. J.; Zhu, G.

2012-09-01T23:59:59.000Z

149

Phase studies of the Zr-H system at high hydrogen concentrations  

Science Journals Connector (OSTI)

The phase boundaries of the Zr-H system have been defined at high hydrogen concentrations, on the basis of studies performed on zirconium hydrides containing 4 at % uranium. The methods used include hightemperature X-ray diffraction, electrical resistance, dilatometry, and, to a limited extent, hot stage microscopy. The (?+?) two-phase region was found to exist between ZrH1.64 and ZrHi1.74 at 24 °C. This region diminishes in width with increasing temperature and closes at 455 °C and ZrH1.70. From this point, a single boundary, sloping toward higher hydrogen concentrations, separates the ? and ? single-phase regions. Precise lattice parameter measurements indicate that first-order transitions occur at the boundaries of the two-phase region. Theoretical considerations suggest that the ? ? ? transition is second order.

K.E. Moore; W.A. Young

1968-01-01T23:59:59.000Z

150

7.10 MATLAB Experiment on Discrete-Time Systems Purpose: In this experiment, we analyze time responses of a higher-order linear discrete-  

E-Print Network (OSTI)

7.10 MATLAB Experiment on Discrete-Time Systems Purpose: In this experiment, we analyze time responses of a higher-order linear discrete- time system using MATLAB. We study system impulse, step-time dynamic systems using MATLAB. Consider the linear discrete-time system

Gajic, Zoran

151

Advanced Thomson scattering system for high-flux linear plasma generator  

SciTech Connect

An advanced Thomson scattering system has been built for a linear plasma generator for plasma surface interaction studies. The Thomson scattering system is based on a Nd:YAG laser operating at the second harmonic and a detection branch featuring a high etendue (f /3) transmission grating spectrometer equipped with an intensified charged coupled device camera. The system is able to measure electron density (n{sub e}) and temperature (T{sub e}) profiles close to the output of the plasma source and, at a distance of 1.25 m, just in front of a target. The detection system enables to measure 50 spatial channels of about 2 mm each, along a laser chord of 95 mm. By summing a total of 30 laser pulses (0.6 J, 10 Hz), an observational error of 3% in n{sub e} and 6% in T{sub e} (at n{sub e}= 9.4 Multiplication-Sign 10{sup 18} m{sup -3}) can be obtained. Single pulse Thomson scattering measurements can be performed with the same accuracy for n{sub e} > 2.8 Multiplication-Sign 10{sup 20} m{sup -3}. The minimum measurable density and temperature are n{sub e} < 1 Multiplication-Sign 10{sup 17} m{sup -3} and T{sub e} < 0.07 eV, respectively. In addition, using the Rayleigh peak, superimposed on the Thomson scattered spectrum, the neutral density (n{sub 0}) of the plasma can be measured with an accuracy of 25% (at n{sub 0}= 1 Multiplication-Sign 10{sup 20} m{sup -3}). In this report, the performance of the Thomson scattering system will be shown along with unprecedented accurate Thomson-Rayleigh scattering measurements on a low-temperature argon plasma expansion into a low-pressure background.

Meiden, H. J. van der; Lof, A. R.; Berg, M. A. van den; Brons, S.; Eck, H. J. N. van; Koelman, P. M. J.; Koppers, W. R.; Kruijt, O. G.; Oyevaar, T.; Prins, P. R.; Rapp, J.; Scholten, J.; Smeets, P. H. M.; Star, G. van der; Zeijlmans van Emmichoven, P. A. [FOM Institute DIFFER, Dutch Institute for Fundamental Energy Research, Association EURATOM-FOM, Trilateral Euregio Cluster, P.O. Box 1207, 3430 BE Nieuwegein (Netherlands); Donne, A. J. H.; Schram, D. C. [FOM Institute DIFFER, Dutch Institute for Fundamental Energy Research, Association EURATOM-FOM, Trilateral Euregio Cluster, P.O. Box 1207, 3430 BE Nieuwegein (Netherlands); Eindhoven University of Technology, Eindhoven (Netherlands); Naumenko, N. N. [IPh NASB, Minsk (Belarus); Tugarinov, S. N. [SRC TRINITI, Troitsk, Moscow Reg. (Russian Federation)

2012-12-15T23:59:59.000Z

152

Priority Based Reservoir Optimization using Linear Programming: Application to Flood Operation of the Iowa/Des Moines River System  

E-Print Network (OSTI)

for preservation of selected operating priorities and the effect that operating constraints have on systemPriority Based Reservoir Optimization using Linear Programming: Application to Flood Operation of the Iowa/Des Moines River System By MATTHEW JASON BROWN B.S. (The Pennsylvania State University) 1995

Lund, Jay R.

153

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

154

Cost and performance analysis of concentrating solar power systems with integrated latent thermal energy storage  

Science Journals Connector (OSTI)

Abstract Integrating TES (thermal energy storage) in a CSP (concentrating solar power) plant allows for continuous operation even during times when solar irradiation is not available, thus providing a reliable output to the grid. In the present study, the cost and performance models of an EPCM-TES (encapsulated phase change material thermal energy storage) system and HP-TES (latent thermal storage system with embedded heat pipes) are integrated with a CSP power tower system model utilizing Rankine and s-CO2 (supercritical carbon-dioxide) power conversion cycles, to investigate the dynamic TES-integrated plant performance. The influence of design parameters of the storage system on the performance of a 200 MWe capacity power tower CSP plant is studied to establish design envelopes that satisfy the U.S. Department of Energy SunShot Initiative requirements, which include a round-trip annualized exergetic efficiency greater than 95%, storage cost less than $15/kWht and LCE (levelized cost of electricity) less than 6 ¢/kWh. From the design windows, optimum designs of the storage system based on minimum LCE, maximum exergetic efficiency, and maximum capacity factor are reported and compared with the results of two-tank molten salt storage system. Overall, the study presents the first effort to construct and analyze LTES (latent thermal energy storage) integrated CSP plant performance that can help assess the impact, cost and performance of LTES systems on power generation from molten salt power tower CSP plant.

K. Nithyanandam; R. Pitchumani

2014-01-01T23:59:59.000Z

155

Technical and economical system comparison of photovoltaic and concentrating solar thermal power systems depending on annual global irradiation  

Science Journals Connector (OSTI)

Concentrating solar thermal power and photovoltaics are two major technologies for converting sunlight to electricity. Variations of the annual solar irradiation depending on the site influence their annual efficiency, specific output and electricity generation cost. Detailed technical and economical analyses performed with computer simulations point out differences of solar thermal parabolic trough power plants, non-tracked and two-axis-tracked PV systems. Therefore, 61 sites in Europe and North Africa covering a global annual irradiation range from 923 to 2438 kW h/m2 a have been examined. Simulation results are usable irradiation by the systems, specific annual system output and levelled electricity cost. Cost assumptions are made for today's cost and expected cost in 10 years considering different progress ratios. This will lead to a cost reduction by 50% for PV systems and by 40% for solar thermal power plants. The simulation results show where are optimal regions for installing solar thermal trough and tracked PV systems in comparison to non-tracked PV. For low irradiation values the annual output of solar thermal systems is much lower than of PV systems. On the other hand, for high irradiations solar thermal systems provide the best-cost solution even when considering higher cost reduction factors for PV in the next decade. Electricity generation cost much below 10 Eurocents per kW h for solar thermal systems and about 12 Eurocents/kW h for PV can be expected in 10 years in North Africa.

Volker Quaschning

2004-01-01T23:59:59.000Z

156

Adaptive regulation system for a linear alternator driven by a free-piston stirling engine  

SciTech Connect

This patent describes an adaptive load regulator for a linear alternator driven by a free piston Stirling engine, having a heat energy source, the alternator having an armature circuit and a useful load connected to the armature circuit, and further including a stepped armature system for controlling the stroke amplitude of the Stirling engine. The regulator and the stepped armature system comprise: (a) a controllably variable conductance shunted across the armature; (b) a negative feedback control circuit comprising: (i) a summing circuit; (ii) a voltage detector means connected to the armature circuit for detecting a signal which is proportional to the alternator output voltage and connected to apply the detected signal to an input of the summing circuit; (iii) a reference signal source connected to apply its reference signal to another input of the summing circuit; and (iv) an amplifier having its input connected to the output of the summing circuit and its output connected to the control input of the controllable, variable conductance for applying a signal which is proportional to the difference of the input signals at the summing circuit to a control input of the variable conductance for varying the conductance in proportion to detected voltage changes; (c) an armature coil divided into a plurality of coils serially connected by one or more taps; (d) circuit means having an input connected to the useful load for detecting the steady state output power demand of the useful load and (e) logic switching means.

Redlich, R.W.

1987-02-10T23:59:59.000Z

157

On the linear response and scattering of an interacting molecule-metal system  

SciTech Connect

A many-body Green’s function approach to the microscopic theory of plasmon-enhanced spectroscopy is presented within the context of localized surface-plasmon resonancespectroscopy and applied to investigate the coupling between quantum-molecular and classical-plasmonic resonances in monolayer-coated silver nanoparticles. Electronic propagators or Green’s functions, accounting for the repeated polarizationinteraction between a single molecule and its image in a nearby nanoscale metal, are explicitly computed and used to construct the linear-response properties of the combined molecule-metal system to an external electromagnetic perturbation. Shifting and finite lifetime of states appear rigorously and automatically within our approach and reveal an intricate coupling between molecule and metal not fully described by previous theories. Self-consistent incorporation of this quantum-molecular response into the continuum-electromagnetic scattering of the molecule-metal target is exploited to compute the localized surface-plasmon resonance wavelength shift with respect to the bare metal from first principles.

Masiello, David J.; Schatz, George C.

2010-01-01T23:59:59.000Z

158

Sharp decay estimates for an anisotropic linear semigroup and applications to the SQG and inviscid Boussinesq systems  

E-Print Network (OSTI)

At the core of this article is an improved, sharp dispersive estimate for the anisotropic linear semigroup $e^{R_1 t}$ arising in both the study of the dispersive SQG equation and the inviscid Boussinesq system. We combine the decay estimate with a blow-up criterion to show how dispersion leads to long-time existence of solutions to the dispersive SQG equation, improving the results obtained using hyperbolic methods. In the setting of the inviscid Boussinesq system it turns out that linearization around a specific stationary solution leads to the same linear semigroup, so that we can make use of analogous techniques to obtain stability of the stationary solution for an increased timespan.

Tarek M. Elgindi; Klaus Widmayer

2014-10-06T23:59:59.000Z

159

A SPIKE-based preconditioned GPU Solver for Sparse Linear Systems Ang Li Andrew Seidl Radu Serban Dan Negrut  

E-Print Network (OSTI)

- tronomy, nuclear engineering, quantum chemistry, finance, oil and gas exploration, etc., GPU computing on general purpose graphics processing unit (GPGPU) computing to solve large linear systems. To methodology data (SIMD) processing. The modern GPUs have a deep memory hierarchy that at the low-end displays

Negrut, Dan

160

Exergoeconomic analysis of high concentration photovoltaic thermal co-generation system for space cooling  

Science Journals Connector (OSTI)

Abstract This paper provides an exergetic analysis of a 10 MW high concentration photovoltaic thermal (HCPVT) power plant case study located in Hammam Bou Hadjar, Algeria. The novel HCPVT multi-energy carrier plant converts 25% of the direct normal irradiance (DNI) into electrical energy and 62.5% to low grade heat for a combined efficiency of 87.5%. The HCPVT system employs a point focus dish concentrator with a cooled PV receiver module. The novel “hot-water” cooling approach is used for energy reuse purposes and is enabled by our state-of-the-art substrate integrated micro-cooling technology. The high performance cooler of the receiver with a thermal resistance of <0.12 cm2 K/W enables the receiver module to handle concentrations of up to 5000 suns. In the present study, a concentration of 2000 suns allows using coolant fluid temperatures of up to 80 °C. This key innovation ensures reliable operation of the triple junction PV (3JPV) cells used and also allows heat recovery for utilization in other thermal applications such as space cooling, heating, and desalination. Within this context, an exergoeconomics analysis of photovoltaic thermal co-generation for space cooling is presented in this manuscript. The valuation method presented here for the HCPVT multi-energy carrier plant comprises both the technical and economic perspectives. The proposed model determines how the cost structure is evolving in four different scenarios by quantifying the potential thermal energy demand in Hammam Bou Hadjar. The model pins down the influence of technical details such as the exergetic efficiency to the economic value of the otherwise wasted heat. The thermal energy reuse boosts the power station?s overall yield, reduces total average costs and optimizes power supply as fixed capital is deployed more efficiently. It is observed that even though potential cooling demand can be substantial (19,490 MWh per household), prices for cooling should be 3 times lower than those of electricity in Algeria (18 USD/MWh) to be competitive. This implies a need to reach economies of scale in the production of individual key components of the HCPVT system. The net present value (NPV) is calculated taking growth rates and the system?s modular efficiencies into account, discounted over 25 years. Scenario 1 shows that even though Algeria currently has no market for thermal energy, a break-even quantity (49,728 MWh) can be deduced by taking into account the relation between fixed costs and the marginal profit. Scenario 2 focuses on the national growth rate needed to break even, i.e. +10.92%. Scenario 3 illustrates thermal price variations given an increase in the Coefficient of Performance (COP) of a thermally driven adsorption chiller after year 10. In this case, the price for cooling will decrease from 18 USD/MWh to 14 USD/MWh. Finally, scenario 4 depicts Hammam Bou Hadjar?s potential cooling demand per household and the growth rate needed to break even if a market for heat would exist.

Veronica Garcia-Heller; Stephan Paredes; Chin Lee Ong; Patrick Ruch; Bruno Michel

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "linear concentrator 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

Elevated critical micelle concentration in soil–water system and its implication on PAH removal and surfactant selecting  

Science Journals Connector (OSTI)

Triton X-100 (TX100) and Brij 35 (B35) were used to investigate the elevated critical micelle concentration (CMC) induced by surfactant sorption and its influence on PAH removal in soil washing systems. The surfa...

Helian Li; Jiajun Chen; Lin Jiang

2014-05-01T23:59:59.000Z

162

A Linear Discrete Dynamic System Model for Temporal Gene Interaction and Regulatory Network Influence in Response to Bioethanol Conversion Inhibitor HMF for Ethanologenic Yeast  

Science Journals Connector (OSTI)

A linear discrete dynamic system model is constructed to represent the temporal interactions among significantly expressed genes in response to bioethanol conversion inhibitor 5-hydroxymethylfurfural for ethanolo...

Mingzhou (Joe) Song; Z. Lewis Liu

2007-01-01T23:59:59.000Z

163

A 50-MeV mm-wave electron linear accelerator system for production of tunable short wavelength synchrotron radiation  

SciTech Connect

The Advanced Photon Source (APS) at Argonne in collaboration with the University of Illinois at Chicago and the University of Wisconsin at Madison is developing a new millimeter wavelength, 50-MeV electron linear accelerator system for production of coherent tunable wavelength synchrotron radiation. Modern micromachining techniques based on deep etch x-ray lithography, LIGA (Lithografie, Galvanoformung, Abformung), capable of producing high-aspect ratio structures are being considered for the fabrication of the accelerating components.

Nassiri, A.; Kustom, R.L.; Mills, F.E.; Kang, Y.W.; Matthews, P.J.; Grudzien, D.; Song, J.; Horan, D. [Argonne National Lab., IL (United States). Advanced Photon Source Accelerator Systems Div.; Feinerman, A.D.; Willke, T.L. [Argonne National Lab., IL (United States). Advanced Photon Source Accelerator Systems Div.]|[Univ. of Illinois, Chicago, IL (United States). Dept. of Electrical Engineering and Computer Science; Henke, H. [Argonne National Lab., IL (United States). Advanced Photon Source Accelerator Systems Div.]|[Technische Univ., Berlin (Germany). Inst. fuer Theoretische Electrotechnik

1993-12-31T23:59:59.000Z

164

Environmental Assessment and Metrics for Solar: Case Study of SolFocus Solar Concentrator Systems  

E-Print Network (OSTI)

investment metric for solar technologies is discussed as afresnel concentrator solar technology in 2005 [13], one ofone installed to the grid; solar technology installed at the

Reich-Weiser, Corinne; Dornfeld, David; Horne, Steve

2008-01-01T23:59:59.000Z

165

Impact of Solar Resource and Atmospheric Constituents on Energy Yield Models for Concentrated Photovoltaic Systems .  

E-Print Network (OSTI)

??Global economic trends suggest that there is a need to generate sustainable renewable energy to meet growing global energy demands. Solar energy harnessed by concentrated… (more)

Mohammed, Jafaru

2013-01-01T23:59:59.000Z

166

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System  

E-Print Network (OSTI)

A Better Steam Engine: Designing a Distributed Concentrating2011 Abstract A Better Steam Engine: Designing a Distributedprovided for a steam Rankine cycle heat engine achieving 50%

Norwood, Zachary Mills

2011-01-01T23:59:59.000Z

167

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System  

E-Print Network (OSTI)

towers have also been well explored, notably by BrightSource, Solarsolar concentrator, a hybrid balancing the pros and cons of traditional dish and power-tower

Norwood, Zachary Mills

2011-01-01T23:59:59.000Z

168

Energy Department Announces Projects to Advance Cost-Effective Concentrating Solar Power Systems  

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

The Energy Department today announced $10 million for six new research and development projects that will advance innovative concentrating solar power (CSP) technologies. The projects will develop...

169

Energy Department Announces Projects to Advance Cost-Effective Concentrating Solar Power Systems  

Office of Energy Efficiency and Renewable Energy (EERE)

The Energy Department today announced $10 million for six new research and development projects that will advance innovative concentrating solar power (CSP) technologies.

170

Linear quadratic regulator for time-varying hyperbolic distributed parameter systems  

Science Journals Connector (OSTI)

......concentration along the reactor are shown in Figure 2. To assess the reliability of the above algorithm...Contribution to the analysis and control of distributed...2001) Trajectory analysis of nonisothermal tubular reactor nonlinear models......

Ilyasse Aksikas; J. Fraser Forbes

2010-09-01T23:59:59.000Z

171

Extending the eigCG algorithm to nonsymmetric Lanczos for linear systems with multiple right-hand sides  

SciTech Connect

The technique that was used to build the EigCG algorithm for sparse symmetric linear systems is extended to the nonsymmetric case using the BiCG algorithm. We show that, similarly to the symmetric case, we can build an algorithm that is capable of computing a few smallest magnitude eigenvalues and their corresponding left and right eigenvectors of a nonsymmetric matrix using only a small window of the BiCG residuals while simultaneously solving a linear system with that matrix. For a system with multiple right-hand sides, we give an algorithm that computes incrementally more eigenvalues while solving the first few systems and then uses the computed eigenvectors to deflate BiCGStab for the remaining systems. Our experiments on various test problems, including Lattice QCD, show the remarkable ability of EigBiCG to compute spectral approximations with accuracy comparable to that of the unrestarted, nonsymmetric Lanczos. Furthermore, our incremental EigBiCG followed by appropriately restarted and deflated BiCGStab provides a competitive method for systems with multiple right-hand sides.

Abdel-Rehim, A. M.; Stathopoulos, Andreas; Orginos, Kostas

2014-08-01T23:59:59.000Z

172

Energy 101: Concentrating Solar Power  

SciTech Connect

From towers to dishes to linear mirrors to troughs, concentrating solar power (CSP) technologies reflect and collect solar heat to generate electricity. A single CSP plant can generate enough power for about 90,000 homes. This video explains what CSP is, how it works, and how systems like parabolic troughs produce renewable power. For more information on the Office of Energy Efficiency and Renewable Energy's CSP research, see the Solar Energy Technology Program's Concentrating Solar Power Web page at http://www1.eere.energy.gov/solar/csp_program.html.

None

2010-01-01T23:59:59.000Z

173

Energy 101: Concentrating Solar Power  

ScienceCinema (OSTI)

From towers to dishes to linear mirrors to troughs, concentrating solar power (CSP) technologies reflect and collect solar heat to generate electricity. A single CSP plant can generate enough power for about 90,000 homes. This video explains what CSP is, how it works, and how systems like parabolic troughs produce renewable power. For more information on the Office of Energy Efficiency and Renewable Energy's CSP research, see the Solar Energy Technology Program's Concentrating Solar Power Web page at http://www1.eere.energy.gov/solar/csp_program.html.

None

2013-05-29T23:59:59.000Z

174

Uncertainty of Concentration–Terrestrial Carbon Feedback in Earth System Models  

Science Journals Connector (OSTI)

Carbon uptake by land and ocean as a biogeochemical response to increasing atmospheric CO2 concentration is called concentration–carbon feedback and is one of the carbon cycle feedbacks of the global climate. This feedback can have a major impact ...

Tomohiro Hajima; Kaoru Tachiiri; Akihiko Ito; Michio Kawamiya

2014-05-01T23:59:59.000Z

175

An analytic solution for a fault tree with circular logics in which the systems are linearly interrelated  

Science Journals Connector (OSTI)

A circular logic or a logical loop is defined as the infinite circulation of supporting relations due to their mutual dependencies among the systems in the fault tree analysis. While many methods to break the circular logic have been developed and used in the fault tree quantification codes, the general solution for a circular logic is not generally known as yet. This paper presents an analytic solution for circular logics in which the systems are linearly interrelated with each other. To formulate the analytic solution, the relations among systems in the fault tree structure are described by the Boolean equations. The solution is, then, obtained from the successive substitutions of the Boolean equations, which is equivalent to the attaching processes of interrelated system's fault tree to a given fault tree. The solution for three interrelated systems and their independent fault tree structures are given as an example.

Ho-Gon Lim; Seung-Cheol Jang

2007-01-01T23:59:59.000Z

176

Variable structure control of linear time-delay uncertain singular system  

Science Journals Connector (OSTI)

Synthesis and designing of variable structure controller for time-delay singular uncertain system are studied. Firstly, the system is decomposed into two low dimensional subsystems. Secondly, switching function and variable structure controller are ... Keywords: VSC, controller design, singular systems, switching function, time delay, uncertain systems, variable structure control

Jifeng Guo; Cunchen Gao

2009-04-01T23:59:59.000Z

177

On the linear operation of cloned dynamical systems and its Lyapunov exponents  

E-Print Network (OSTI)

The cloned dynamical system theory is introduced and the Lyapunov exponents of this system are qualitatively proven to be same as the original dynamical system. This property indicates that these two systems have the same error propagation speed in the phase space, and thus we can interpret the phenomenon as why the ensemble mean method sometimes is not effective.

Pengfei Wang

2013-11-10T23:59:59.000Z

178

Concentrated solutions for internal wave equations  

SciTech Connect

The authors consider the propagation of internal gravity waves in a stratified fluid layer with a current. Formal asymptotic solutions concentrated in the horizontal plane are constructed for the linearized system of equations in the Boussinesq approximation. The complex space-time ray method is used.

Markov, V.A.

1987-07-10T23:59:59.000Z

179

Project Profile: Regenerative Carbonate-Based Thermochemical Energy Storage System for Concentrating Solar Power  

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

The Department of Energy’s SunShot Initiative awarded Southern Research Institute (SRI) through the Concentrating Solar Power: Efficiently Leveraging Equilibrium Mechanisms for Engineering New Thermochemical Storage (CSP: ELEMENTS) funding program.

180

Concentrating solar power | Open Energy Information  

Open Energy Info (EERE)

Concentrating solar power Concentrating solar power (Redirected from Concentrating Solar Power) Jump to: navigation, search Concentrating Solar Power Basics (The following text is derived from NREL's concentrating solar power information page.)[1] Concentrating solar power (CSP) offers a utility-scale, firm, dispatchable renewable energy option that can help meet our nation's demand for electricity. CSP plants produce power by first using mirrors to focus sunlight to heat a working fluid. Ultimately, this high-temperature fluid is used to spin a turbine or power an engine that drives a generator. And the final product is electricity. Smaller CSP systems can be located directly where the power is needed. Larger, utility-scale CSP applications provide hundreds of megawatts of electricity for the power grid. Both linear concentrator and power tower

Note: This page contains sample records for the topic "linear concentrator 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

Concentrating solar power | Open Energy Information  

Open Energy Info (EERE)

Concentrating solar power Concentrating solar power (Redirected from - Concentrating Solar Power) Jump to: navigation, search Concentrating Solar Power Basics (The following text is derived from NREL's concentrating solar power information page.)[1] Concentrating solar power (CSP) offers a utility-scale, firm, dispatchable renewable energy option that can help meet our nation's demand for electricity. CSP plants produce power by first using mirrors to focus sunlight to heat a working fluid. Ultimately, this high-temperature fluid is used to spin a turbine or power an engine that drives a generator. And the final product is electricity. Smaller CSP systems can be located directly where the power is needed. Larger, utility-scale CSP applications provide hundreds of megawatts of electricity for the power grid. Both linear concentrator and power tower

182

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System  

E-Print Network (OSTI)

DCS-CHP system . . . . . . . . . . . . . . . . . . . 7521 Stationary collector CHP to stationary PV performancesolar dish collector DCS-CHP system . . . . . . 28 Water and

Norwood, Zachary Mills

2011-01-01T23:59:59.000Z

183

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System  

E-Print Network (OSTI)

the membrane systems, reverse osmosis (RO) garners the mostof vapor compression, reverse osmosis, and electrodialysis

Norwood, Zachary Mills

2011-01-01T23:59:59.000Z

184

Characterization and biotoxicity assessment of dissolved organic matter in RO concentrate from a municipal wastewater reclamation reverse osmosis system  

Science Journals Connector (OSTI)

Abstract Reverse osmosis (RO) concentrate from municipal wastewater reclamation reverse osmosis (mWRRO) system containing organic compounds may associate with toxic risk, and its discharge might pose an environmental risk. To identify a basis for the selection of feasible technology in treating RO concentrates, the characteristics and biotoxicity of different fractions of dissolved organic matter (DOM) in RO concentrates from an mWRRO system were investigated. The results indicated that the hydrophilic neutrals (HIN), hydrophobic acids (HOA) and hydrophobic bases (HOB) accounted for 96% of the dissolved organic carbon (DOC) of the total DOM in the RO concentrate. According to the SEC chromatograph detected at 254 nm wavelength of UV, the DOM with molecular weight (MW) 1–3 kDa accounted for the majority of the basic and neutral fractions. The fluorescence spectra of the excitation emission matrix (EEM) indicated that most aromatic proteins, humic/fulvic acid-like and soluble microbial by-product-like substances existed in the fractions HOA and hydrophobic neutrals (HON). The genotoxicity and anti-estrogenic activity of the RO concentrate were 1795.6 ± 57.2 ?g 4-NQO L?1 and 2.19 ± 0.05 mg TAM L?1, respectively. The HIN, HOA, and HOB contributed to the genotoxicity of the RO concentrate, and the HIN was with the highest genotoxic level of 1007.9 ± 94.8 ?g 4-NQO L?1. The HOA, HON, and HIN lead to the total anti-estrogenic activity of the RO concentrate, and HOA occupied approximately 60% of the total, which was 1.3 ± 0.17 mg TAM L?1.

Ying-Xue Sun; Yue Gao; Hong-Ying Hu; Fang Tang; Zhe Yang

2014-01-01T23:59:59.000Z

185

Coal pyrolysis to acetylene using dc hydrogen plasma torch: effects of system variables on acetylene concentration  

Science Journals Connector (OSTI)

In order to unveil the inner mechanisms that determine acetylene concentration, experimental studies on the effect of several parameters such as plasma torch power, hydrogen flux and coal flux were carried out from coal pyrolysis in a dc plasma torch. Xinjiang long flame coals including volatile constituents at a level of about 42% were used in the experiment. Under the following experimental conditions, namely plasma torch power, hydrogen flow rate and pulverized coal feed speed of 2.12?MW, 32?kg?h?1 and 900?kg?h?1, respectively, acetylene volume concentration of about 9.4% was achieved. The experimental results indicate that parameters such as plasma torch power and coal flux play important roles in the formation of acetylene. Acetylene concentration increases inconspicuously with hydrogen flux. A chemical thermodynamic equilibrium model using the free energy method is introduced in this paper to numerically simulate each experimental condition. The numerical results are qualitatively consistent with the experimental results. Two parameters, i.e. the gas temperature and the ratio of hydrogen/carbon, are considered to be the dominant and independent factors that determine acetylene concentration.

Longwei Chen; Yuedong Meng; Jie Shen; Xingsheng Shu; Shidong Fang; Xinyang Xiong

2009-01-01T23:59:59.000Z

186

A 40KW ROOF MOUNTED PV THERMAL CONCENTRATOR SYSTEM J.F.H. Smeltink1  

E-Print Network (OSTI)

during 2003-4. The system comprises eight 24 metre long single axis tracking reflective solar collectors and hydronic in-slab floor heating. Equipment associated with the solar collection system was installed during

187

Carbon–Concentration and Carbon–Climate Feedbacks in CMIP5 Earth System Models  

Science Journals Connector (OSTI)

The magnitude and evolution of parameters that characterize feedbacks in the coupled carbon–climate system are compared across nine Earth system models (ESMs). The analysis is based on results from biogeochemically, radiatively, and fully coupled ...

Vivek K. Arora; George J. Boer; Pierre Friedlingstein; Michael Eby; Chris D. Jones; James R. Christian; Gordon Bonan; Laurent Bopp; Victor Brovkin; Patricia Cadule; Tomohiro Hajima; Tatiana Ilyina; Keith Lindsay; Jerry F. Tjiputra; Tongwen Wu

2013-08-01T23:59:59.000Z

188

Uncertainty quantification and prediction for non-autonomous linear and nonlinear systems  

E-Print Network (OSTI)

The science of uncertainty quantification has gained a lot of attention over recent years. This is because models of real processes always contain some elements of uncertainty, and also because real systems can be better ...

Phadnis, Akash

2013-01-01T23:59:59.000Z

189

Prediction-based stabilization of linear systems subject to input-dependent input delay of  

E-Print Network (OSTI)

engine [17] and exhaust line [13], heat collector plant [32], blending in liquid or solid networks [12 of system fitting inside this framework is the one of the exhaust Fuel/Air Ratio (FAR) for Gasoline engines

Boyer, Edmond

190

A comparison of iterative methods to solve complex valued linear algebraic systems  

E-Print Network (OSTI)

, electromagnetism, structural dynamics, electrical power system models, wave propagation, magnetized multicomponent.axelsson@it.uu.se Department of Information Technology, Uppsala University, Sweden, maya.neytcheva@it.uu.se King Abdulaziz

Flener, Pierre

191

Study of Linear Equivalent Circuits of Electromechanical Systems for Turbine Generator Units.  

E-Print Network (OSTI)

??The thesis utilizes the analogy in dynamic equations between a mechanical and an electrical system to convert the steam-turbine, micro-turbine, wind-turbine and hydro-turbine generator mechanical… (more)

Tsai, Chia-Chun

2012-01-01T23:59:59.000Z

192

Gregorian optical system with non-linear optical technology for protection against intense optical transients  

DOE Patents (OSTI)

An optical system comprising a concave primary mirror reflects light through an intermediate focus to a secondary mirror. The secondary mirror re-focuses the image to a final image plane. Optical limiter material is placed near the intermediate focus to optically limit the intensity of light so that downstream components of the optical system are protected from intense optical transients. Additional lenses before and/or after the intermediate focus correct optical aberrations.

Ackermann, Mark R. (Albuquerque, NM); Diels, Jean-Claude M. (Albuquerque, NM)

2007-06-26T23:59:59.000Z

193

Feasibility of accompanying uncontrolled linear heater with solar system in natural gas pressure drop stations  

Science Journals Connector (OSTI)

Natural gas (NG) must be preheated before pressure reduction takes places at City Gate Stations (CGS). Indirect Water Bath Gas Heaters are employed in the CGS for preheating. The heaters consume a considerable amount of NG for preheating. As low temperature is required, a solar system has been proposed to provide part of heat demand. The system consists of a collector array and a storage tank. The tank stores solar heat during the day and releases it during the night. To show the capabilities of the proposed system, the Akand CGS has been chosen as a case study. The results show that as the number of collector increases, the fuel cost decreases but the capital cost increases. An optimum number of collectors and the storage tank capacity have been found based on economic analysis. The fuel saving occurs throughout the year with the maximum at June. The economic feasibility study of the proposed system has been carried out using two methods. These methods are Simple Payback Ratio (SPR) and (Net Present Value) NPV. The first one unveils that the payback ratio is only 6.9 years. The NPV method shows that the system will give net benefit after 11 years.

M. Farzaneh-Gord; A. Arabkoohsar; M. Deymi Dasht-bayaz; V. Farzaneh-Kord

2012-01-01T23:59:59.000Z

194

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System  

E-Print Network (OSTI)

because of the high cost of photovoltaic electricity. •cost compares favorably to residential (P e photovoltaic systems in the U.S. that cost ~$

Norwood, Zachary Mills

2011-01-01T23:59:59.000Z

195

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System  

E-Print Network (OSTI)

19 Cost estimates and EIO-LCA data for DCS-CHPEIO-LCA analysis . . . . . . . . . . . . . . . . . . . . . .system in Oakland, CA as used in the LCA analysis of Chapter

Norwood, Zachary Mills

2011-01-01T23:59:59.000Z

196

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

197

Area utilization efficiency of a sloping heliostat system for solar concentration  

Science Journals Connector (OSTI)

Area utilization efficiency (AUE) is formulated for a sloping heliostat system facing any direction. The effects of slope shading, incidence factor, sun shading, and tower blocking by...

Wei, Ling Y

1983-01-01T23:59:59.000Z

198

Linear Accelerator  

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

Linear Accelerator (LINAC) The core of the LANSCE facility is one of the nation's most powerful proton linear accelerators or LINAC. The LINAC at LANSCE has served the nation since...

199

Global existence and uniqueness for a non linear Boussinesq system in dimension two  

E-Print Network (OSTI)

We study the global well-posedness of a two-dimensional Boussinesq system which couples the incompressible Euler equation for the velocity and a transport equation with fractional diffusion of type $|\\DD|^{\\alpha}$ for the temperature. We prove that for $\\alpha>1,$ there exists a unique global solution for initial data with critical regularities.

Sulaiman, Samira

2012-01-01T23:59:59.000Z

200

Linearity and CNR Improvement Technologies against Optical Reflection inFiber-Oriented Wireless Access Systems  

Science Journals Connector (OSTI)

It is important to consider optical reflection conditions when designing fiber-oriented wireless access systems around subcarrier optical transmission since the noise characteristic can be significantly degraded by optical reflection, especially ... Keywords: intensity noise, optical reflection, predistorter, subcarrier optical transmission, superimposed subcarrier modulation, superluminescent diode

Yuji Aburakawa; Hiroyuki Ohtsuka

2000-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "linear concentrator 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

A Non-linear Dynamical Systems' Proof of Kraft-McMillan Inequality and its Converse  

E-Print Network (OSTI)

In this short paper, we shall provide a dynamical systems' proof of the famous Kraft-McMillan inequality and its converse. Kraft-McMillan inequality is a basic result in information theory which gives a necessary and sufficient condition for the lengths of the codewords of a code to be uniquely decodable.

Nithin Nagaraj

2007-10-31T23:59:59.000Z

202

Novel MIMO Linear Zero Dynamic Controller for the Grid-connected Photovoltaic System with  

E-Print Network (OSTI)

sources, such as sunlight, wind, rain, tides and geothermal heat, are the best choices as alternative sources of energy [1]. All of these renewable sources, solar energy is the most commonly use renewable source in the power system. It is the fastest growing renewable source in the world. The energy report

Pota, Himanshu Roy

203

Approximation and inversion of a complex meteorological system via local linear filters  

E-Print Network (OSTI)

been the site of some of the nation's most severe air pollution (Lu et al., 1997b). In order to model to a complex mul- tivariate dynamic model for Southern California air quality is given and the method is shown, simulate, and predict levels of ozone and other pollutants, a multivariate dynamic modeling system called

Schoenberg, Frederic Paik (Rick)

204

Anoxic Plume Attenuation in a Fluctuating Water Table System: Impact of 100-D Area In Situ Redox Manipulation on Downgradient Dissolved Oxygen Concentrations  

SciTech Connect

Anoxic Plume Attenuation in a Fluctuating Water Table System: Impact of 100-D Area In Situ Redox Manipulation on Downgradient Dissolved Oxygen Concentrations

Williams, Mark D.; Vermeul, Vincent R.; Oostrom, Martinus; Evans, John C.; Fruchter, Jonathan S.; Istok, J. D.; Humphrey, M. D.; Lanigan, David C.; Szecsody, James E.; White, Mark D.; Wietsma, Thomas W.; Cole, Charles R.

1999-06-14T23:59:59.000Z

205

The development of an interactive microcomputer-based system to analyze linear network optimization problems  

E-Print Network (OSTI)

-friendly, analysts have found it easier to apply these techniques. There continues to be three major problems associated with available network analysis software. These problems are that there have been few attempts to integrate the most commonly used algorithms...] outline several advantages that network modesl possess. They point out that 1) network models accurately represent many zeal-world systems; 2) network models seem to be more readily acceptable to non- analysts than do other types of operations research...

Fowler, John Welsh

1986-01-01T23:59:59.000Z

206

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System  

E-Print Network (OSTI)

and cost of solar water purification/desalination ($1.40/mand potential for water purification/desalination using DCS-to the feed-water of the desalination/purification system as

Norwood, Zachary Mills

2011-01-01T23:59:59.000Z

207

Project Profile: Novel Thermal Energy Storage Systems for Concentrating Solar Power  

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

The University of Connecticut, under the Thermal Storage FOA, is developing innovative heat transfer devices and methodologies for novel thermal energy storage (TES) systems for CSP involving phase change materials (PCMs).

208

Concentration solar power optimization system and method of using the same  

DOE Patents (OSTI)

A system and method for optimizing at least one mirror of at least one CSP system is provided. The system has a screen for displaying light patterns for reflection by the mirror, a camera for receiving a reflection of the light patterns from the mirror, and a solar characterization tool. The solar characterization tool has a characterizing unit for determining at least one mirror parameter of the mirror based on an initial position of the camera and the screen, and a refinement unit for refining the determined parameter(s) based on an adjusted position of the camera and screen whereby the mirror is characterized. The system may also be provided with a solar alignment tool for comparing at least one mirror parameter of the mirror to a design geometry whereby an alignment error is defined, and at least one alignment unit for adjusting the mirror to reduce the alignment error.

Andraka, Charles E

2014-03-18T23:59:59.000Z

209

21 - Thermal energy storage systems for concentrating solar power (CSP) technology  

Science Journals Connector (OSTI)

Abstract The option to supply electricity on demand is a key advantage of solar thermal power plants with integrated thermal storage. Diurnal storage systems providing thermal power in the multi-MW range for several hours are required here, the temperature range being between 250 °C and 700 °C. This chapter describes the state of the art in commercial storage systems used in solar thermal power generation. An overview of alternative and innovative storage concepts for this application area is given.

W.-D. Steinmann

2015-01-01T23:59:59.000Z

210

Design of linear multivariable systems with reduced sensitivity to parameter variations  

E-Print Network (OSTI)

~on of the model of a synchronous machine connected via two transmission lines to an infinite bus is presented in the Appendix A. The reduced model, where the voltage regulation loop is assumed to function perfectly, is shown in this Appendix to provide an exce... = . 98 lead. Two types of perturbations were simulated between the times t = . 5s and t = 5. 5s (the first . 5 seconds were used to verify that the system was effectively at a quiescent point). Case 1: One of the transmission lines connecting...

Martin, Philippe Jean-Maurice

2012-06-07T23:59:59.000Z

211

the 4th Power Electronics, Drive Systems & Technologies Conference, PEDSTC 2013 Simultaneous Sensing cum Actuating Linear Motor  

E-Print Network (OSTI)

of an electric machine (a linear motor) without using conventional sensors. Tested is a back-drivable linear motor stage which uses the linear motor electric machine as simultaneous sensor cum actuator, and mechanical impedance of the motor by measuring the motor's time variant electrical impedance. The method

Paris-Sud XI, Université de

212

A New Heat Transfer Fluid for Concentrating Solar Systems: Particle Flow in Tubes  

Science Journals Connector (OSTI)

Abstract This paper demonstrates a new concept of heat transfer fluid (HTF) for CSP applications, developed in the frame of both a National and a European project (CSP2 FP7 project). It involves a dense suspension of small solid particles. This innovation is currently. The dense suspension of particles receiver (DSPR) consists in creating the upward circulation of a dense suspension of particles (solid fraction in the range 30%-40%) in vertical absorbing tubes submitted to concentrated solar energy. So the suspension acts as a heat transfer fluid with a heat capacity similar to a liquid HTF but only limited in temperature by the working temperature limit of the receiver tubes. Suspension temperatures up to 750 °C are expected for metallic tubes, thus opening new opportunities for high efficiency thermodynamic cycles such as supercritical steam and carbon dioxide. First experimental results were obtained during on-sun testing with CNRS solar facility of a single tube DSPR for an outlet temperature lower than 300 °C. In this lab-scale experimental setup, the solar absorber is a single opaque metallic tube, containing upward solid circulation, located inside a cylindrical cavity dug in a receiver made of refractory, and submitted to the concentrated solar radiation through a 0.10m x 0.50m slot. The absorber is a 42.4 mm o.d. stainless steel tube. SiC was used because of its thermal properties, availability and rather low cost. The 63.9 ?m particle mean diameter permits a good fluidization with almost no bubbles, for very low air velocities. Solar flux densities in the range 200-250 kW/m2 were tested resulting in solid temperature increase ranging between 50 and 150 °C. The mean wall-to-suspension heat transfer coefficient (h) was calculated from experimental data. It is very sensitive to the solid fraction of the solid suspension, which was varied from 27% to 36%. These latter values are one order of magnitude larger than the solid fraction in circulating fluidized beds operating at much higher air velocity. Heat transfer coefficients ranging from 140 to 500 W/m2.K have been obtained; i.e. 400 W/m2.K mean value for standard operating conditions at low temperature.

G. Flamant; D. Gauthier; H. Benoit; J.-L. Sans; B. Boissière; R. Ansart; M. Hemati

2014-01-01T23:59:59.000Z

213

PCG reference manual: A package for the iterative solution of large sparse linear systems on parallel computers. Version 1.0  

SciTech Connect

PCG (Preconditioned Conjugate Gradient package) is a system for solving linear equations of the form Au = b, for A a given matrix and b and u vectors. PCG, employing various gradient-type iterative methods coupled with preconditioners, is designed for general linear systems, with emphasis on sparse systems such as these arising from discretization of partial differential equations arising from physical applications. It can be used to solve linear equations efficiently on parallel computer architectures. Much of the code is reusable across architectures and the package is portable across different systems; the machines that are currently supported is listed. This manual is intended to be the general-purpose reference describing all features of the package accessible to the user; suggestions are also given regarding which methods to use for a given problem.

Joubert, W.D. [Los Alamos National Lab., NM (United States); Carey, G.F.; Kohli, H.; Lorber, A.; McLay, R.T.; Shen, Y. [Texas Univ., Austin, TX (United States); Berner, N.A. [Texas Univ., Austin, TX (United States)]|[Los Alamos National Lab., NM (United States); Kalhan, A. [Los Alamos National Lab., NM (United States)]|[Tennessee Univ., Knoxville, TN (United States)

1995-01-01T23:59:59.000Z

214

Concentrating solar power | Open Energy Information  

Open Energy Info (EERE)

Concentrating Solar Power Basics (The following text is derived from NREL's concentrating solar power information page.)[1] Concentrating solar power (CSP) offers a utility-scale, firm, dispatchable renewable energy option that can help meet our nation's demand for electricity. CSP plants produce power by first using mirrors to focus sunlight to heat a working fluid. Ultimately, this high-temperature fluid is used to spin a turbine or power an engine that drives a generator. And the final product is electricity. Smaller CSP systems can be located directly where the power is needed. Larger, utility-scale CSP applications provide hundreds of megawatts of electricity for the power grid. Both linear concentrator and power tower systems can be easily integrated with thermal storage, helping to generate

215

Comparison of Fresnel concentrators for building integrated photovoltaics  

Science Journals Connector (OSTI)

To develop concentrating photovoltaic systems for building integration applications, two optical devices are proposed. The concentrators are based in stationary linear Fresnel lenses and secondary CPC. The moving focal area is ten times smaller than the Fresnel lens aperture. Concentrator characteristics are studied in detail: shadowing effect, placement of the focal area and optical concentration efficiency. The main contribution of this paper is the three-dimensional optical analysis of the non-imaging concentrating systems. In terms of solar radiation, photovoltaic moving modules placed in the focal area of stationary concentrators are compared with simply fixed photovoltaic modules. In favourable weather locations, the beam radiation incident on the concentrating modules would be a large percentage, more than 50%, of the global radiation received by the fixed photovoltaic devices.

Daniel Chemisana; Manuel Ibáñez; Jerome Barrau

2009-01-01T23:59:59.000Z

216

An elastic mounting system for a wing providing continuously non-linear responses in pitch and plunge  

E-Print Network (OSTI)

A device was built that provides smooth non-linear restoring forces and moments to the pitch and plunge of a wing in a wind tunnel. The device uses an innovative combination of cams and linear extension springs to produce the restoring forces which...

Barnett, Walter Joseph

1996-01-01T23:59:59.000Z

217

Energy 101: Concentrating Solar Power | Department of Energy  

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

Concentrating Solar Power Concentrating Solar Power Energy 101: Concentrating Solar Power Addthis Below is the text version for the Energy 101: Concentrating Solar Power video. The video opens with the words "Energy 101: Concentrating Solar Power." OK. Take the natural heat from the sun, reflect it against a mirror, focus all of that heat on one area, send it through a power system, and you've got a renewable way of making electricity. It's called concentrating solar power, or CSP. Caption: Concentrating Solar Power (CSP): Focuses the sun's heat to make steam and electricity. Now, there are many types of CSP technologies. Towers, dishes, linear mirrors, and troughs. The video goes through a quick panorama of several different types, and several different views, of all of the different types of CSP. Finally, it

218

Concentrating Information  

E-Print Network (OSTI)

We introduce the concentrated information of tripartite quantum states. For three parties Alice, Bob and Charlie, it is defined as the maximal mutual information achievable between Alice and Charlie via local operations and classical communication performed by Charlie and Bob. The gap between classical and quantum concentrated information is shown to be an operational figure of merit for a state merging protocol involving shared mixed states and no distributed entanglement. We derive upper and lower bounds on the concentrated information, and obtain a closed expression for arbitrary pure tripartite states in the asymptotic setting. In this situation, one-way classical communication is shown to be sufficient for optimal information concentration.

Alexander Streltsov; Soojoon Lee; Gerardo Adesso

2014-10-23T23:59:59.000Z

219

Development of a Future Representative Concentration Pathway for Use in the IPCC 5th Assessment Earth System Model Simulations  

SciTech Connect

The representative concentration pathway to be delivered is a scenario of atmospheric concentrations of greenhouse gases and other radiatively important atmospheric species, along with land-use changes, derived from the Global Change Assessment Model (GCAM). The particular representative concentration pathway (RCP) that the Joint Global Change Research Institute (JGCRI) has been responsible for is a not-to-exceed pathway that stabilizes at a radiative forcing of 4.5Wm-2 in the year 2100.

None

2010-12-29T23:59:59.000Z

220

Low-Cost Heliostat for Modular Systems- Presentation from SunShot Concentrating Solar Power (CSP) Program Review 2013  

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

This presentation was delivered at the SunShot Concentrating Solar Power (CSP) Program Review 2013, held April 23–25, 2013 near Phoenix, Arizona.

Note: This page contains sample records for the topic "linear concentrator 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

Theory of diffusion and sorption of various substances through a biporous sorbent membrane for the case of a constant concentration difference at its boundaries and a linear sorption isotherm. I. Case of an exponential kinetic function for the microporous zones  

Science Journals Connector (OSTI)

An analytical solution has been obtained for the passage of the sorbed substance through a membrane of a biporous sorbent for the case of constant concentration differences of the sorptive on its boundaries and a...

V. I. Ulin; P. P. Zolotarev; A. I. Pilipenko

1980-08-01T23:59:59.000Z

222

Variation in indoor particle number and PM2.5 concentrations in a radio station surrounded by busy roads before and after an upgrade of the HVAC system  

Science Journals Connector (OSTI)

Indoor particle number and PM2.5 concentrations were investigated in a radio station surrounded by busy roads. Two extensive field measurement campaigns were conducted to determine the critical parameters affecting indoor air quality. The results indicated that indoor particle number and PM2.5 concentrations were governed by outdoor air, and were significantly affected by the location of air intake and design of HVAC system. Prior to the upgrade of the HVAC system and relocation of the air intake, the indoor median particle number concentration was 7.4×103 particles/cm3 and the median PM2.5 concentration was 7 ?g/m3. After the relocation of air intake and the redesign of the HVAC system, the indoor particle number concentration was between 2.3×103 and 3.4×103 particles/cm3, with a median value of 2.7×103 particles/cm3, and the indoor PM2.5 concentration was in the range of 3–5 ?g/m3, with a median value of 4 ?g/m3. By relocating the air intake of the HVAC, the outdoor particle number and PM2.5 concentrations near the air intake were reduced by 35% and 55%, respectively. In addition, with the relocation of air intake and the redesign of the HVAC system, the particle number penetration rate was reduced from 42% to 14%, and the overall filtration efficiency of the HVAC system (relocation of air intake, pre-filter, AHU and particle losses in the air duct) increased from 58% to 86%. For PM2.5, the penetration rate after the upgrade was approximately 18% and the overall filtration efficiency was 82%. This study demonstrates that by using a comprehensive approach, including the assessment of outdoor conditions and characterisation of ventilation and filtration parameters, satisfactory indoor air quality can be achieved, even for those indoor environments facing challenging outdoor air conditions.

L. Morawska; M. Jamriska; H. Guo; E.R. Jayaratne; M. Cao; S. Summerville

2009-01-01T23:59:59.000Z

223

Highly-complex optical signal generation using electro-optical systems with non-linear, non-invertible transmission functions  

E-Print Network (OSTI)

We present a scheme whereby a static non-linear, non-invertible transmission function performed by the electro-optic Mach-Zehnder modulator produces highly complex optical chaos. The scheme allows the deterministic transformation of low-dimensional band-limited chaotic signals into much higher-dimensional structures with broadband spectra and without using any delay elements or feedback. Standard benchmark tests show that all the considered complexity indices are highly increased due to this transformation in a controlled fashion. This mechanism allows the design of simple optoelectronic delayed oscillators with extremely complex chaotic output.

José J. Suárez-Vargas; Bicky A. Márquez; Jorge A. González

2012-08-06T23:59:59.000Z

224

Ultrahigh-sensitivity high-linearity photodetection system using a low-gain avalanche photodiode with an ultralow-noise readout circuit  

E-Print Network (OSTI)

A highly sensitive photodetection system with a detection limit of 1 photon/s was developed. This system uses a commercially available 200-mm-diameter silicon avalanche photodiode (APD) and an in-house-developed ultralow-noise readout circuit, which are both cooled to 77 K. When the APD operates at a low gain of about 10, it has a high-linearity response to the number of incident photons and a low excess noise factor. The APD also has high quantum efficiency and a dark current of less than 1 e/s at 77 K. This photodetection system will shorten the measurement time and enable higher spatial and wavelength resolution for near-field scanning optical microscopes.

Makoto Akiba; Mikio Fujiwara; Masahide Sasaki

2005-03-04T23:59:59.000Z

225

Results and Comparison from the SAM Linear Fresnel Technology Performance Model: Preprint  

SciTech Connect

This paper presents the new Linear Fresnel technology performance model in NREL's System Advisor Model. The model predicts the financial and technical performance of direct-steam-generation Linear Fresnel power plants, and can be used to analyze a range of system configurations. This paper presents a brief discussion of the model formulation and motivation, and provides extensive discussion of the model performance and financial results. The Linear Fresnel technology is also compared to other concentrating solar power technologies in both qualitative and quantitative measures. The Linear Fresnel model - developed in conjunction with the Electric Power Research Institute - provides users with the ability to model a variety of solar field layouts, fossil backup configurations, thermal receiver designs, and steam generation conditions. This flexibility aims to encompass current market solutions for the DSG Linear Fresnel technology, which is seeing increasing exposure in fossil plant augmentation and stand-alone power generation applications.

Wagner, M. J.

2012-04-01T23:59:59.000Z

226

Status of Programs for the DoD Family of Linear Drive Cryogenic Coolers for Weapon Systems  

Science Journals Connector (OSTI)

The Standard Advanced Dewar Assembly (SADA) is the critical module in the Department of Defense (DOD) standardization effort of second-generation thermal imaging systems. DOD has established a family of SADAs to ...

W. E. Salazar

2002-01-01T23:59:59.000Z

227

Boussinesq Equations and Other Systems for Small-Amplitude Long Waves in Nonlinear Dispersive Media. I: Derivation and Linear Theory  

Science Journals Connector (OSTI)

...Considered herein are a number of variants of the classical Boussinesq system and their higher-order generalizations. Such equations were first derived by Boussinesq to describe the two-way propagation of ... ...

Bona; Chen; Saut

2002-08-01T23:59:59.000Z

228

2013 IREP Symposium-Bulk Power System Dynamics and Control IX (IREP), August 25-30, 2013, Rethymnon, Greece A Production Simulation Tool for Systems with an Integrated Concentrated Solar  

E-Print Network (OSTI)

, Rethymnon, Greece A Production Simulation Tool for Systems with an Integrated Concentrated Solar Plant2013 IREP Symposium-Bulk Power System Dynamics and Control ­IX (IREP), August 25-30, 2013 with Thermal Energy Storage Ti Xu George Gross University of Illinois at Urbana-Champaign University

Gross, George

229

Linear induction accelerator  

DOE Patents (OSTI)

A linear induction accelerator includes a plurality of adder cavities arranged in a series and provided in a structure which is evacuated so that a vacuum inductance is provided between each adder cavity and the structure. An energy storage system for the adder cavities includes a pulsed current source and a respective plurality of bipolar converting networks connected thereto. The bipolar high-voltage, high-repetition-rate square pulse train sets and resets the cavities. 4 figs.

Buttram, M.T.; Ginn, J.W.

1988-06-21T23:59:59.000Z

230

New architecture for RF power amplifier linearization  

E-Print Network (OSTI)

Power amplifier linearization has become an important part of the transmitter system as 3G and developing 4G communication standards require higher linearity than ever before. The thesis proposes two power amplifier ...

Boo, Hyun H

2009-01-01T23:59:59.000Z

231

Improvements in dose accuracy delivered with static-MLC IMRT on an integrated linear accelerator control system  

SciTech Connect

Purpose: Dose accuracy has been shown to vary with dose per segment and dose rate when delivered with static multileaf collimator (SMLC) intensity modulated radiation therapy (IMRT) by Varian C-series MLC controllers. The authors investigated the impact of monitor units (MUs) per segment and dose rate on the dose delivery accuracy of SMLC-IMRT fields on a Varian TrueBeam linear accelerator (LINAC), which delivers dose and manages motion of all components using a single integrated controller. Methods: An SMLC sequence was created consisting of ten identical 10 x 10 cm{sup 2} segments with identical MUs. Beam holding between segments was achieved by moving one out-of-field MLC leaf pair. Measurements were repeated for various combinations of MU/segment ranging from 1 to 40 and dose rates of 100-600 MU/min for a 6 MV photon beam (6X) and dose rates of 800-2400 MU/min for a 10 MV flattening-filter free photon (10XFFF) beam. All measurements were made with a Farmer (0.6 cm{sup 3}) ionization chamber placed at the isocenter in a solid-water phantom at 10 cm depth. The measurements were performed on two Varian LINACs: C-series Trilogy and TrueBeam. Each sequence was delivered three times and the dose readings for the corresponding segments were averaged. The effects of MU/segment, dose rate, and LINAC type on the relative dose variation ({Delta}{sub i}) were compared using F-tests ({alpha} = 0.05). Results: On the Trilogy, large {Delta}{sub i} was observed in small MU segments: at 1 MU/segment, the maximum {Delta}{sub i} was 10.1% and 57.9% at 100 MU/min and 600 MU/min, respectively. Also, the first segment of each sequence consistently overshot ({Delta}{sub i} > 0), while the last segment consistently undershot ({Delta}{sub i} < 0). On the TrueBeam, at 1 MU/segment, {Delta}{sub i} ranged from 3.0% to 4.5% at 100 and 600 MU/min; no obvious overshoot/undershoot trend was observed. F-tests showed statistically significant difference [(1 - {beta}) =1.0000] between the Trilogy and the TrueBeam up to 10 MU/segment, at all dose rates greater than 100 MU/min. The linear trend of decreasing dose accuracy as a function of increasing dose rate on the Trilogy is no longer apparent on TrueBeam, even for dose rates as high as 2400 MU/min. Dose inaccuracy averaged over all ten segments in each beam delivery sequence was larger for Trilogy than TrueBeam, with the largest discrepancy (0.2% vs 3%) occurring for 1 MU/segment beams at both 300 and 600 MU/min. Conclusions: Earlier generations of Varian LINACs exhibited large dose variations for small MU segments in SMLC-IMRT delivery. Our results confirmed these findings. The dose delivery accuracy for SMLC-IMRT is significantly improved on TrueBeam compared to Trilogy for every combination of low MU/segment (1-10) and high dose rate (200-600 MU/min), in part due to the faster sampling rate (100 vs 20 Hz) and enhanced electronic integration of the MLC controller with the LINAC. SMLC-IMRT can be implemented on TrueBeam with higher dose accuracy per beam ({+-}0.2% vs {+-}3%) than previous generations of Varian C-series LINACs for 1 MU/segment delivered at 600 MU/min).

Li Ji; Wiersma, Rodney D.; Stepaniak, Christopher J.; Farrey, Karl J.; Al-Hallaq, Hania A. [Department of Radiation and Cellular Oncology, University of Chicago, 5758 South Maryland Avenue, MC9006, Chicago, Illinois 60637 (United States)

2012-05-15T23:59:59.000Z

232

Scattering Solar Thermal Concentrators  

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

"This fact sheet describes a scattering solar thermal concentrators project awarded under the DOE's 2012 SunShot Concentrating Solar Power R&D award program. The team, led by the Pennsylvania State University, is working to demonstrate a new, scattering-based approach to concentrating sunlight that aims to improve the overall performance and reliability of the collector field. The research team aims to show that scattering solar thermal collectors are capable of achieving optical performance equal to state-of-the-art parabolic trough systems, but with the added benefits of immunity to wind-load tracking error, more efficient land use, and utilization of stationary receivers."

233

Concentrating photovoltaic solar panel  

DOE Patents (OSTI)

The present invention relates to photovoltaic power systems, photovoltaic concentrator modules, and related methods. In particular, the present invention features concentrator modules having interior points of attachment for an articulating mechanism and/or an articulating mechanism that has a unique arrangement of chassis members so as to isolate bending, etc. from being transferred among the chassis members. The present invention also features adjustable solar panel mounting features and/or mounting features with two or more degrees of freedom. The present invention also features a mechanical fastener for secondary optics in a concentrator module.

Cashion, Steven A; Bowser, Michael R; Farrelly, Mark B; Hines, Braden E; Holmes, Howard C; Johnson, Jr., Richard L; Russell, Richard J; Turk, Michael F

2014-04-15T23:59:59.000Z

234

Analysis of concentrating PV-T systems for the commercial/industrial sector. Volume III. Technical issues and design guidance  

SciTech Connect

This report provide appropriate guidance for addressing the major technical issues associated with the design and installation of a photovoltaic-thermal (PV-T) system. Nomographs are presented for developing preliminary sizing and costing, and issues associated with specific components and the overall design of the electrical and mechanical system are discussed. SAND82-7157/2 presents a review of current PV-T technology and operating systems and a study of potential PV-T applications. Detailed PV-T system designs for three selected applications and the results of a trade-off study for these applications are presented in SAND82-7157/4. A summary of the major results of this entire study and conclusions concerning PV-T systems and applications is presented in SAND82-7157/1.

Schwinkendorf, W.E.

1984-09-01T23:59:59.000Z

235

Study on the radiation flux and temperature distributions of the concentrator–receiver system in a solar dish/Stirling power facility  

Science Journals Connector (OSTI)

Uniform heater temperature and high optical–thermal efficiency are crucial for the reliable and economical operation of a Solar Dish/Stirling engine facility. The Monte-Carlo ray-tracing method is utilized to predict the radiation flux distributions of the concentrator–receiver system. The ray-tracing method is first validated by experiment, then the radiation flux profiles on the solar receiver surface for faceted real concentrator and ideal paraboloidal concentrator, irradiated by Xe-arc lamps and real sun, for different aperture positions and receiver shapes are analyzed, respectively. The resulted radiation flux profiles are subsequently transferred to a CFD code as boundary conditions to numerically simulate the fluid flow and conjugate heat transfer in the receiver cavity by coupling the radiation, natural convection and heat conduction together, and the CFD method is also validated through experiment. The results indicate that a faceted concentrator in combination with a solar simulator composed of 12 Xe-arc lamps is advantageous to drive the solar Stirling engine for all-weather indoor tests. Based on the simulation results, a solar receiver-Stirling heater configuration is designed to achieve a considerably uniform temperature distribution on the heater head tubes while maintaining a high efficiency of 60.7%.

Zhigang Li; Dawei Tang; Jinglong Du; Tie Li

2011-01-01T23:59:59.000Z

236

Sandia National Laboratories: concentrating photovoltaic  

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

Energy Efficiency On March 29, 2013, in Concentrating Solar Power, Energy, Partnership, Photovoltaic, Renewable Energy, Research & Capabilities, Solar, Systems Engineering MODE...

237

Concentrated solar power on demand .  

E-Print Network (OSTI)

??This thesis describes a new concentrating solar power central receiver system with integral thermal storage. Hillside mounted heliostats direct sunlight into a volumetric absorption molten… (more)

Codd, Daniel Shawn

2011-01-01T23:59:59.000Z

238

Propagation of ion-acoustic solitons in an electron beam-superthermal plasma system with finite ion-temperature: Linear and fully nonlinear investigation  

SciTech Connect

The propagation of ion-acoustic (IA) solitons is studied in a plasma system, comprised of warm ions and superthermal (Kappa distributed) electrons in the presence of an electron-beam by using a hydrodynamic model. In the linear analysis, it is seen that increasing the superthermality lowers the phase speed of the IA waves. On the other hand, in a fully nonlinear investigation, the Mach number range and characteristics of IA solitons are analyzed, parametrically and numerically. It is found that the accessible region for the existence of IA solitons reduces with increasing the superthermality. However, IA solitons with both negative and positive polarities can coexist in the system. Additionally, solitary waves with both subsonic and supersonic speeds are predicted in the plasma, depending on the value of ion-temperature and the superthermality of electrons in the system. It is examined that there are upper critical values for beam parameters (i.e., density and velocity) after which, IA solitary waves could not propagate in the plasma. Furthermore, a typical interaction between IA waves and the electron-beam in the plasma is confirmed.

Saberian, E. [Department of Physics, Faculty of Sciences, Azarbaijan Shahid Madani University, 53714-161 Tabriz (Iran, Islamic Republic of); Department of Physics, Faculty of Basic Sciences, University of Neyshabur, Neyshabur (Iran, Islamic Republic of); Esfandyari-Kalejahi, A.; Rastkar-Ebrahimzadeh, A.; Afsari-Ghazi, M. [Department of Physics, Faculty of Sciences, Azarbaijan Shahid Madani University, 53714-161 Tabriz (Iran, Islamic Republic of)

2013-03-15T23:59:59.000Z

239

Arontis Solar Concentrator AB | Open Energy Information  

Open Energy Info (EERE)

Harnosand, Sweden Zip: SE-871 31 Product: Developer of a medium-concentrating, one axis sun tracking PV system that also produces hot water. References: Arontis Solar Concentrator...

240

Experimental Analysis of Two Measurement Techniques to Characterize Photodiode Linearity  

E-Print Network (OSTI)

Experimental Analysis of Two Measurement Techniques to Characterize Photodiode Linearity Anand anand@ece.ucsb.edu Abstract--As photodiodes become more linear, accurately characterizing, the limitations of the measurement system in determining the distortion of highly linear photodiodes. I

Coldren, Larry A.

Note: This page contains sample records for the topic "linear concentrator 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

A Linear Base Articulated Robot Arm for Surgical Endoscopy.  

E-Print Network (OSTI)

??This project involved developing a surgical robot assistant using an articulated robot running on a linear axis. The research concentrated on studying the localization of… (more)

Kracht, Aaron Arthur

2006-01-01T23:59:59.000Z

242

The Marketing Concentration  

E-Print Network (OSTI)

The Marketing Concentration The Manning School of Business www.uml.edu/management Who We Are, management, management information systems, marketing and supply chain and operations management we provide education possible." -- Andy Hwang Marketing Major "I chose UMass Lowell because of its high level

Massachusetts at Lowell, University of

243

Concentrating Energy by Measurement  

E-Print Network (OSTI)

In a recent article [A. Kurcz et al., Phys. Rev. A 81, 063821 (2010)] we predicted an energy concentrating mechanism in composite quantum systems. Its result is a non-zero stationary state photon emission rate even in the absence of external driving. Here we discuss the possible origin of the predicted effect. We attribute it to the presence of a non-trivial interaction between different system components and to repeated environment-induced photon measurements.

Almut Beige; Antonio Capolupo; Andreas Kurcz; Emilio Del Giudice; Giuseppe Vitiello

2010-12-29T23:59:59.000Z

244

Validation of a comercially available fluorescence-based instrument to evaluate stallion spermatozoal concentration and comparison to photometric systems  

E-Print Network (OSTI)

ejaculated and extended spermatozoa. The instrument is also more repeatable than either photometric system, but may be cost-prohibitive for some operations. v v ACKNOWLEDGEMENTS The author wishes to thank ChemoMetec A/S of Aler?d, Denmark... in commercial breding operations because they are more afordable than a flow cytometer and produce results more quickly than a hemacytometer. ChemoMetec A/S (Aler?d, Denmark) has developed the NucleoCounter SP-100, a fluorescence-based instrument...

Comerford, Kathryn L.

2010-01-16T23:59:59.000Z

245

lgebra Linear Mauro Rincon  

E-Print Network (OSTI)

8.1 Álgebra Linear Mauro Rincon Márcia Fampa Aula 8: Soluções de Sistemas de Equações Lineares #12

Cabral, Marco

246

NREL: Concentrating Solar Power Research - Southwest Concentrating Solar  

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

Southwest Concentrating Solar Power 1000-MW Initiative Southwest Concentrating Solar Power 1000-MW Initiative Photos of various concentrating solar power systems. NREL, working through SunLab, supports the U.S. Department of Energy's goal to install 1,000 megawatts (MW) of new concentrating solar power systems in the southwestern United States by 2010. This level of deployment, combined with research and development to reduce technology component costs, could help reduce concentrating solar power electricity costs to $0.07/kilowatt-hour. At this cost, concentrating solar power can compete effectively in the Southwest's energy markets. To achieve the Initiative's goal, the U.S. Department of Energy is partnering with the Western Governors' Association to encourage concentrating solar power installations in Arizona, California, Colorado,

247

Effect of Induced-Charge Electro-Kinetics on Concentration-Polarization in a Microchannel-Nafion System  

E-Print Network (OSTI)

Induced-charge electro-osmosis (ICEO) is shown to control the length scale of the diffusion layer (DL), which in turn, affects the diffusion limited ion transport through the microchannel-Nafion membrane system. The ICEO vortices form at an interdigitated floating electrode array embedded within a microchannel interfacing a Nafion membrane and stir the fluid, arresting the diffusive growth of the depletion layer. By varying the spacing between the array and the membrane we are able to control the length of the DL. Activating the electrodes results in further enhancement of the fluid stirring due to the emergence of alternating-current electro-osmotic (ACEO) flow on top of the ICEO. Such a new method of controlling the DL with an electrode array is of great importance in many CP related realizations.

Park, Sinwook

2015-01-01T23:59:59.000Z

248

Energy 101: Concentrating Solar Power | Department of Energy  

Energy Savers (EERE)

From towers to dishes to linear mirrors to troughs, concentrating solar power (CSP) technologies reflect and collect solar heat to generate electricity. A single CSP...

249

Linear chain magnetism  

Science Journals Connector (OSTI)

Linear chain magnetism ... A brief introduction to this concept, which is also called lower dimensional magnetism. ...

Richard L. Carlin

1991-01-01T23:59:59.000Z

250

Two linear slot nozzle virtual impactors for concentration of bioaerosols  

E-Print Network (OSTI)

.008?). Optical and physical measurements were made of the nozzle dimensions in the critical region of the virtual impactor units. For the LSVI units the misalignment between the acceleration nozzle and the receiver nozzle was measured between 6 ? m (0....00025?) and 29 ? m (0.00114?). This represented a range of 2% to 10% misalignment relative to the acceleration nozzle width. The CSVI Unit 1 and 2 misalignments were measured to be 15 ? m (0.00061?) and 9 ? m (0.00036?), or 10% and 1.8% relative misalignment...

Haglund, John Steven

2005-02-17T23:59:59.000Z

251

Excitation energies with linear response density matrix functional theory along the dissociation coordinate of an electron-pair bond in N-electron systems  

SciTech Connect

Time dependent density matrix functional theory in its adiabatic linear response formulation delivers exact excitation energies ?{sub ?} and oscillator strengths f{sub ?} for two-electron systems if extended to the so-called phase including natural orbital (PINO) theory. The Löwdin-Shull expression for the energy of two-electron systems in terms of the natural orbitals and their phases affords in this case an exact phase-including natural orbital functional (PILS), which is non-primitive (contains other than just J and K integrals). In this paper, the extension of the PILS functional to N-electron systems is investigated. With the example of an elementary primitive NO functional (BBC1) it is shown that current density matrix functional theory ground state functionals, which were designed to produce decent approximations to the total energy, fail to deliver a qualitatively correct structure of the (inverse) response function, due to essential deficiencies in the reconstruction of the two-body reduced density matrix (2RDM). We now deduce essential features of an N-electron functional from a wavefunction Ansatz: The extension of the two-electron Löwdin-Shull wavefunction to the N-electron case informs about the phase information. In this paper, applications of this extended Löwdin-Shull (ELS) functional are considered for the simplest case, ELS(1): one (dissociating) two-electron bond in the field of occupied (including core) orbitals. ELS(1) produces high quality ?{sub ?}(R) curves along the bond dissociation coordinate R for the molecules LiH, Li{sub 2}, and BH with the two outer valence electrons correlated. All of these results indicate that response properties are much more sensitive to deficiencies in the reconstruction of the 2RDM than the ground state energy, since derivatives of the functional with respect to both the NOs and the occupation numbers need to be accurate.

Meer, R. van; Gritsenko, O. V. [Faculty of Exact Sciences, Theoretical Chemistry, VU University, Amsterdam (Netherlands) [Faculty of Exact Sciences, Theoretical Chemistry, VU University, Amsterdam (Netherlands); WCU Program, Dep. of Chemistry, Pohang Univ. of Science and Techn., Pohang (Korea, Republic of); Baerends, E. J. [Faculty of Exact Sciences, Theoretical Chemistry, VU University, Amsterdam (Netherlands) [Faculty of Exact Sciences, Theoretical Chemistry, VU University, Amsterdam (Netherlands); WCU Program, Dep. of Chemistry, Pohang Univ. of Science and Techn., Pohang (Korea, Republic of); Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589 (Saudi Arabia)

2014-01-14T23:59:59.000Z

252

ARM - Measurement - Aerosol concentration  

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

concentration concentration ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Aerosol concentration A measure of the amount of aerosol particles (e.g. number, mass, volume) per unit volume of air. Categories Aerosols Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments AOS : Aerosol Observing System CSPHOT : Cimel Sunphotometer CPC : Condensation Particle Counter IAP : In-situ Aerosol Profiles (Cessna Aerosol Flights) TDMA : Tandem Differential Mobility Analyzer

253

Drivers and Barriers in the Current Concentrated Solar Power (CSP) Market  

Open Energy Info (EERE)

Drivers and Barriers in the Current Concentrated Solar Power (CSP) Market Drivers and Barriers in the Current Concentrated Solar Power (CSP) Market (Webinar) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Drivers and Barriers in the Current Concentrated Solar Power (CSP) Market (Webinar) Focus Area: Solar Topics: Market Analysis Website: www.leonardo-energy.org/webinar-drivers-and-barriers-current-csp-marke Equivalent URI: cleanenergysolutions.org/content/drivers-and-barriers-current-concentr Language: English Policies: Regulations Regulations: Mandates/Targets This video teaches users about the four major types of concentrating solar power technologies (CSP): parabolic trough, tower concentrators, linear Fresnel lenses and dish engine systems. It also provides an overview of the trends in the market and research that should be performed in order to make

254

Optimal concentrations in transport systems  

Science Journals Connector (OSTI)

...in the fluid requires power W u 2 l to overcome the...roadway. Generally, car speed v = v(rho) is...with c = 0) and the power alpha is determined by...plants and animals, the power alpha = 1, because there...is twice as viscous as water, i.e. opt = 2 0...

2013-01-01T23:59:59.000Z

255

Optimal concentrations in transport systems  

Science Journals Connector (OSTI)

...Springer. 14 Haynes, WM (ed.). 2012 CRC handbook of chemistry and physics, 93rd edn. Boca Raton, FL: CRC Press. 15 Jensen...Schadschneider, A . 2002 Traffic flow: a statistical physics point of view. Phys. A Stat. Mech. Appl. 313...

2013-01-01T23:59:59.000Z

256

Under Contract No. DE-AC36-83CH10093 LARGE-AREA, HIGH-INTENSITY PV ARRAYS FOR SYSTEMS USING DISH CONCENTRATING OPTICS  

E-Print Network (OSTI)

ABSTRACT: In this paper, we report on our efforts to fabricate monolithic interconnected modules (MIMs) using III-V semiconductors with bandgaps appropriate for the terrestrial solar spectrum. The small size of the component cells comprising the MIM allows for operation at extremely high flux densities and relaxes the requirement for a small spot-size to be generated by the optics. This makes possible a PV option for the large dish concentrator systems that have been developed by the solar thermal community for use with Stirling engines. Additionally, the highly effective back-surface reflector integrated into the MIM design is an effective tool for thermal management of the array. Development of this technology would radically alter the projections for PV manufacturing capacity because of the potential for extremely high power generation per unit area of semiconductor material.

J. S. Ward; A. Duda; K. Zweibel; T. J. Coutts; J. S. Ward; A. Duda; K. Zweibel; T. J. Coutts

257

A Bayesian Approach to Empirical Local Linearization For Robotics   

E-Print Network (OSTI)

Local linearizations are ubiquitous in the control of robotic systems. Analytical methods, if available, can be used to obtain the linearization, but in complex robotics systems where the dynamics and kinematics are ...

Ting, Jo-Anne; D'Souza, Aaron; Vijayakumar, Sethu; Schaal, Stefan

2008-01-01T23:59:59.000Z

258

SunShot Initiative: Concentrating Solar Power  

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

Concentrating Solar Power to Concentrating Solar Power to someone by E-mail Share SunShot Initiative: Concentrating Solar Power on Facebook Tweet about SunShot Initiative: Concentrating Solar Power on Twitter Bookmark SunShot Initiative: Concentrating Solar Power on Google Bookmark SunShot Initiative: Concentrating Solar Power on Delicious Rank SunShot Initiative: Concentrating Solar Power on Digg Find More places to share SunShot Initiative: Concentrating Solar Power on AddThis.com... Concentrating Solar Power Systems Components Competitive Awards Staff Photovoltaics Systems Integration Balance of Systems Concentrating Solar Power SunShot CSP Team Learn more about the SunShot concentrating solar power program staff by visiting the team's profile pages. Argonne National Laboratory Argonne National Laboratory

259

Piecewise Linear Phase Transitions  

E-Print Network (OSTI)

It is shown how simple assumptions lead to piecewise linear behavior, which is observed in certain phase transitions.

Joseph B. Keller

2007-11-26T23:59:59.000Z

260

Process for concentrated biomass saccharification  

DOE Patents (OSTI)

Processes for saccharification of pretreated biomass to obtain high concentrations of fermentable sugars are provided. Specifically, a process was developed that uses a fed batch approach with particle size reduction to provide a high dry weight of biomass content enzymatic saccharification reaction, which produces a high sugars concentration hydrolysate, using a low cost reactor system.

Hennessey, Susan M. (Avondale, PA); Seapan, Mayis (Landenberg, PA); Elander, Richard T. (Evergreen, CO); Tucker, Melvin P. (Lakewood, CO)

2010-10-05T23:59:59.000Z

Note: This page contains sample records for the topic "linear concentrator 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

NREL: Concentrating Solar Power Research - Data and Resources  

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

Data and Resources Data and Resources For concentrating solar power technologies, NREL features the following online solar radiation resource data and solar resource maps, as well as data for renewable energy power plants. Also see TroughNet's data and resources specifically for parabolic trough technology. Concentrating Solar Power Projects around the World NREL, in conjunction with SolarPACES (Solar Power and Chemical Energy Systems), maintains a database of CSP projects around the world with plants that are either operational, under construction, or under development. CSP technologies include parabolic trough, linear Fresnel reflector, power tower, and dish/engine systems. Each project profile includes background information, a listing of project participants, and data on the power-plant

262

Techno-economic assessment of substituting natural gas based heater with thermal energy storage system in parabolic trough concentrated solar power plant  

Science Journals Connector (OSTI)

Abstract Parabolic-trough (PT) concentrated solar power (CSP) plants are very vulnerable to daily fluctuations in solar radiation. This dependence can be mitigated through a hybridization of solar energy with natural gas based heaters that supply thermal energy during the night or whenever solar irradiance level is dimmed. However, there is more sustainable way for CSP plants to avoid power-generation-outages caused by transient weather conditions, i.e. installation of thermal energy storage (TES). Such a system stores surplus thermal energy provided by solar field during sunny hours and discharges it when the sun is not available. Shams-1 PT plant in Madinat-Zayed, United-Arab-Emirates (UAE) has two natural gas based components, i.e. steam-booster heater and heat transfer fluid (HTF) heater. In the current study, model of Shams-1 was developed and analyzed in the System Advisor Model (SAM) software. It has been attempted to replace the HTF heater with TES. A parametric study has been conducted to determine the size of the TES as well as the solar field such that the specified power target demand would be satisfied. The results of the parametric analysis showed that TES can't completely replace the HTF heater, within reasonable sizes. Nevertheless, consequent simulations depicts that TES increases the capacity factor on one hand and decreases fuel consumption on the other hand.

V. Poghosyan; Mohamed I. Hassan

2015-01-01T23:59:59.000Z

263

Reversible concentric ring microfluidic interconnects  

E-Print Network (OSTI)

A reversible, Chip-to-Chip microfluidic interconnect was designed for use in high temperature, high pressure applications such as chemical microreactor systems. The interconnect uses two sets of concentric, interlocking ...

Thompson, Mary Kathryn, 1980-

2004-01-01T23:59:59.000Z

264

Introduction to Linear Bialgebra  

E-Print Network (OSTI)

The algebraic structure, linear algebra happens to be one of the subjects which yields itself to applications to several fields like coding or communication theory, Markov chains, representation of groups and graphs, Leontief economic models and so on. This book has for the first time, introduced a new algebraic structure called linear bialgebra, which is also a very powerful algebraic tool that can yield itself to applications. With the recent introduction of bimatrices (2005)we have ventured in this book to introduce new concepts like linear bialgebra and Smarandache neutrosophic linear bialgebra and also give the applications of these algebraic structures. It is important to mention here it is a matter of simple exercise to extend these to linear n-algebra for any n greater than 2; for n = 2 we get the linear bialgebra. This book has five chapters. In the first chapter we just introduce some basic notions of linear algebra and Slinear algebra and their applications. Chapter two introduces some new algebraic bistructures. In chapter three we introduce the notion of linear bialgebra and discuss several interesting properties about them. Also, application of linear bialgebra to bicodes is given. A remarkable part of our research in this book is the introduction of the notion of birepresentation of bigroups. The fourth chapter introduces several neutrosophic algebraic structures since they help in defining the new concept of neutrosophic linear bialgebra, neutrosophic bivector spaces, Smarandache neutrosophic linear bialgebra and Smarandache neutrosophic bivector spaces. Theirprobable applications to real-world models are discussed.

W. B. Vasantha Kandasamy; Florentin Smarandache; K. Ilanthenral

2005-08-15T23:59:59.000Z

265

Concentrating Solar Power Forum Concentrating Photovoltaics (Presentation)  

SciTech Connect

This presentation's summaries: a convenient truth, comparison of three concentrator technologies, value of high efficiency, and status of industry.

Kurtz, S.

2008-05-06T23:59:59.000Z

266

History of Proton Linear Accelerators  

E-Print Network (OSTI)

much. References 1. Linear Accelerators, edited by P. M .at the 1986 Linear Accelerator Conference, SLAC, Stanford,HISTORY OF PROTON LINEAR ACCELERATORS Luis W. Alvarez TWO-

Alvarez, Luis W.

1987-01-01T23:59:59.000Z

267

Unit I-2 Linear Maps 1 Linear maps  

E-Print Network (OSTI)

Unit I-2 Linear Maps 1 Unit I-2 Linear maps Unit I-2 Linear Maps 2 Linear map · V & U are vector spaces over the same scalars · a function f: VU is a linear map if it preserves the vector space transformation [particularly when f: RnRm] ­ linear operator when f: V V [same v.s.] ­ linear mapping ­ linear

Birkett, Stephen

268

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: REGULAR PAPERS, VOL. 56, NO. 9, SEPTEMBER 2009 2109 Robust Linear Control of (Chaotic)  

E-Print Network (OSTI)

Robust Linear Control of (Chaotic) Permanent-Magnet Synchronous Motors With Uncertainties Antonio Loría, Member, IEEE Abstract--We solve the problem of set-point (respectively, tracking) control of a permanent-magnet permanent-magnet synchronous machines (PMSM). This problem has attracted a number of researchers from

Boyer, Edmond

269

lgebra Linear Mauro Rincon  

E-Print Network (OSTI)

10.1 Álgebra Linear Mauro Rincon Márcia Fampa Aula 10: Determinantes #12;10.2 8.1 - Definições #12

Cabral, Marco

270

Linear Graphene Plasmons  

Science Journals Connector (OSTI)

The coupling of the plasmon spectra of graphene and a nearby thick plasma is examined here in detail. The coupled modes include linear plasmons. Keywords: Graphene, plasmons, surface

N. J.M. Horing

2010-11-01T23:59:59.000Z

271

Focusing in Linear Accelerators  

DOE R&D Accomplishments (OSTI)

Review of the theory of focusing in linear accelerators with comments on the incompatibility of phase stability and first-order focusing in a simple accelerator.

McMillan, E. M.

1950-08-24T23:59:59.000Z

272

Linear phase compressive filter  

DOE Patents (OSTI)

A phase linear filter for soliton suppression is in the form of a laddered series of stages of non-commensurate low pass filters with each low pass filter having a series coupled inductance (L) and a reverse biased, voltage dependent varactor diode, to ground which acts as a variable capacitance (C). L and C values are set to levels which correspond to a linear or conventional phase linear filter. Inductance is mapped directly from that of an equivalent nonlinear transmission line and capacitance is mapped from the linear case using a large signal equivalent of a nonlinear transmission line.

McEwan, Thomas E. (Livermore, CA)

1995-01-01T23:59:59.000Z

273

Solar Concentration in Space  

Science Journals Connector (OSTI)

Solar concentrators go space. Lens and mirror-based solar concentrators have recently begun to boost photovoltaic power supplies for satellites in space. In 1998, the first mission carrying solar concentrators...

Dr. Ralf Leutz; Dr. Akio Suzuki

2001-01-01T23:59:59.000Z

274

Postmortem Memantine Concentrations  

Science Journals Connector (OSTI)

......case-report Case Report Postmortem Memantine Concentrations Nichole Bynum * Justin...Postmortem fluid and tissue concentrations of memantine (Namenda), a drug recently approved...in a suspicious death. In addition, memantine concentrations considered to be incidental......

Nichole Bynum; Justin Poklis; Diana Garside; Ruth Winecker

2007-05-01T23:59:59.000Z

275

Optical oxygen concentration monitor  

DOE Patents (OSTI)

A system for measuring and monitoring the concentration of oxygen uses as a light source an argon discharge lamp, which inherently emits light with a spectral line that is close to one of oxygen`s A-band absorption lines. In a preferred embodiment, the argon line is split into sets of components of shorter and longer wavelengths by a magnetic field of approximately 2,000 Gauss that is parallel to the light propagation from the lamp. The longer wavelength components are centered on an absorption line of oxygen and thus readily absorbed, and the shorter wavelength components are moved away from that line and minimally absorbed. A polarization modulator alternately selects the set of the longer wavelength, or upshifted, components or the set of the shorter wavelength, or downshifted, components and passes the selected set to an environment of interest. After transmission over a path through that environment, the transmitted optical flux of the argon line varies as a result of the differential absorption. The system then determines the concentration of oxygen in the environment based on the changes in the transmitted optical flux between the two sets of components. In alternative embodiments modulation is achieved by selectively reversing the polarity of the magnetic field or by selectively supplying the magnetic field to either the emitting plasma of the lamp or the environment of interest. 4 figs.

Kebabian, P.

1997-07-22T23:59:59.000Z

276

Optical oxygen concentration monitor  

DOE Patents (OSTI)

A system for measuring and monitoring the concentration of oxygen uses as a light source an argon discharge lamp, which inherently emits light with a spectral line that is close to one of oxygen's A-band absorption lines. In a preferred embodiment, the argon line is split into sets of components of shorter and longer wavelengths by a magnetic field of approximately 2000 Gauss that is parallel to the light propagation from the lamp. The longer wavelength components are centered on an absorption line of oxygen and thus readily absorbed, and the shorter wavelength components are moved away from that line and minimally absorbed. A polarization modulator alternately selects the set of the longer wavelength, or upshifted, components or the set of the shorter wavelength, or downshifted, components and passes the selected set to an environment of interest. After transmission over a path through that environment, the transmitted optical flux of the argon line varies as a result of the differential absorption. The system then determines the concentration of oxygen in the environment based on the changes in the transmitted optical flux between the two sets of components. In alternative embodiments modulation is achieved by selectively reversing the polarity of the magnetic field or by selectively supplying the magnetic field to either the emitting plasma of the lamp or the environment of interest.

Kebabian, Paul (Acton, MA)

1997-01-01T23:59:59.000Z

277

Research on Solar High-Temperature Absorption Air-Conditioning Systems  

Science Journals Connector (OSTI)

This paper studies the characteristics and performance of solar higher-temperature absorption air conditioning systems which employed linear concentrating collectors and double-effect absorption chillers. A solar...

Guoqing Yu; Jinhua Tang; Zhijun Zou

2009-01-01T23:59:59.000Z

278

Using Linearity Web Copyright 2007  

E-Print Network (OSTI)

Using Linearity Web Rev. 2.0 May 2007 Copyright © 2007 #12;Using Linearity Web i Contents Introduction to Linearity Web.............................................................................1 Features, Benefits, and Value of Linearity Web..............................................1 Before You

Rodriguez, Carlos

279

SLAC linear collider  

SciTech Connect

A brief description of the proposed SLAC Linear Collider is given. This machine would investigate the possibilities and limitations of Linear Colliders while at the same time producing thousands of Z/sup 0/ particles per day for the study of the weak interactions.

Hollebeek, R.

1980-06-01T23:59:59.000Z

280

18.06 Linear Algebra, Spring 2005  

E-Print Network (OSTI)

This is a basic subject on matrix theory and linear algebra. Emphasis is given to topics that will be useful in other disciplines, including systems of equations, vector spaces, determinants, eigenvalues, similarity, and ...

Strang, Gilbert

Note: This page contains sample records for the topic "linear concentrator 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.


282

Linear chain tensioning of moored production vessels  

SciTech Connect

Part 1 of this two-part series discussed the worldwide floating production vessel (FPV) market and evolution of the linear puller concept. The three principal types of chain jack systems - hollow ram, single and twin cylinders - were introduced. And advantages of this relatively new form of passive mooring were outlined. This concluding article covers applications of linear chain pullers on various vessels, including use on an example 35,000-t North Sea semi-submersible. Chain wear and how linear pullers avoid wear associated with windlass-type systems are discussed, along with the optimization possible through use of a swiveling chain fair-lead latch (SCFL).

Peters, B. (Bardex Corp., London (United Kingdom))

1993-06-01T23:59:59.000Z

283

Nonlinear Control of the Doubly Fed Induction Generator by Input-Output Linearizing Strategy  

Science Journals Connector (OSTI)

With regard to a nonlinear system, the approximate linearized system is convenient to design the controller using method of linear systems, but it does not match to the nonlinear nature of the system. And that...

Guodong Chen; Luhua Zhang; Xu Cai; Wei Zhang…

2011-01-01T23:59:59.000Z

284

Application of Modified Organo-Nanoclay as the Sorbent for Zinc Determination by FAAS: An Optimization Study of an Online Pre-concentration System  

Science Journals Connector (OSTI)

An online column pre-concentration technique, coupled with flame atomic absorption spectrometry, was developed using a column filled with nanoclay modified with morin. For this purpose, ... The sample solution wa...

Mostafa Khajeh

2012-01-01T23:59:59.000Z

285

Predicting residential indoor concentrations of nitrogen dioxide, fine particulate matter, and elemental carbon using questionnaire and geographic information system based data  

E-Print Network (OSTI)

1 2 3 4 5 6 7 8 9 Predicting residential indoor concentrations of nitrogen dioxide, fine collected indoor and outdoor 3-4 day samples of nitrogen dioxide (NO2) and fine particulate matter (PM2

Paciorek, Chris

286

Combined effect of chemical pressure and valence electron concentration through the electron-deficient Li substitution on the RE{sub 4}LiGe{sub 4} (RE=La, Ce, Pr, and Sm) system  

SciTech Connect

Four members of the RE{sub 4}LiGe{sub 4} (RE=La, Ce, Pr, and Sm) system have been prepared by high-temperature reaction method and characterized by X-ray diffractions. All compounds crystallize in the orthorhombic Gd{sub 5}Si{sub 4}-type structure (space group Pnma, Pearson code oP16) with bonding interactions for interslab Ge{sub 2} dimers. The Li substitution for rare-earth elements in the RE{sub 4}LiGe{sub 4} system leads to a combined effect of the increased chemical pressure and the decreased valance electron concentration (VEC), which eventually results in the structure transformation from the Sm{sub 5}Ge{sub 4}-type with all broken interslab Ge–Ge bond for the parental RE{sub 5}Ge{sub 4} to the Gd{sub 5}Si{sub 4}-type structure for the ternary RE{sub 4}LiGe{sub 4} (RE=La, Ce, Pr, and Sm) system. Site-preference between rare-earth metals and Li is proven to generate energetically the most favorable atomic arrangements according to coloring-problem, and the rationale is provided using both the size-factor and the electronic-factor related, respectively, to site-volume and electronegativity as well as QVAL values. Tight-binding, linear-muffin-tin-orbital (TB-LMTO) calculations are performed to investigate electronic densities of states (DOS) and crystal orbital Hamilton population (COHP) curves. The influence of reduced VEC for chemical bonding including the formation of interslab Ge{sub 2} dimers is also discussed. The magnetic property measurements prove that the non-magnetic Li substitution leads to the ferromagnetic (FM)-like ground state for Ce{sub 4}LiGe{sub 4} and the co-existence of antiferromagntic (AFM) and FM ground states for Sm{sub 4}LiGe{sub 4}. - Graphical abstract: Reported is a combined effect of the chemical pressure and the reduced VEC caused by the smaller monovalent non-magnetic Li substitution for the larger trivalent magnetic rare-earth metals in the RE{sub 4}LiGe{sub 4} (RE=La, Ce, Pr, and Sm) system. This results in the structure transformation from the Sm{sub 5}Ge{sub 4}-type to the Gd{sub 5}Si{sub 4}-type structure and the changes in magnetic properties. Display Omitted - Highlights: • Four Li-containing intermetallic compounds RE{sub 4}LiGe{sub 4} (RE=La, Ce, Pr and Sm) were synthesized. • The combined effect of the chemical pressure and the reduced VEC caused by Li substitution for a rare-earth metal results in the structure transformation. • Electronic structures and magnetic properties of title compounds were thoroughly investigated.

Nam, Gnu; Jeon, Jieun; Kim, Youngjo [Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763 (Korea, Republic of); Kwon Kang, Sung [Department of Chemistry, Chungnam National University, Daejeon, Chungnam 305-764 (Korea, Republic of); Ahn, Kyunghan [Advanced Materials Research Center, Samsung Advanced Institute of Technology, Yongin-si, Gyeonggi-do 446-712 (Korea, Republic of); You, Tae-Soo, E-mail: tsyou@chungbuk.ac.kr [Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763 (Korea, Republic of)

2013-09-15T23:59:59.000Z

287

Concentrating Solar Power Commercial Application Study  

E-Print Network (OSTI)

Towers....................................................................... 9 Dish/Engine Systems, and dish/engine. Parabolic troughs are the most commercially available technology. Linear Fresnel and power Rankine steam cycles, similar to those used for coal and nuclear plants. Steam cycle power plants require

Laughlin, Robert B.

288

Concentrating Solar Power  

Science Journals Connector (OSTI)

Concentrating Solar Power (CSP) has the potential to contribute significantly to the generation of electricity by renewable energy resources in the U.S.. Thermal storage can extend the duty cycle of CSP beyond daytime hours to early evening where the value of electricity is often the highest. The potential solar resource for the southwest U.S. is identified along with the need to add power lines to bring the power to consumers. CSP plants in the U.S. and abroad are described. The CSP cost of electricity at the busbar is discussed. With current incentives CSP is approaching competiveness with conventional gas?fired systems during peak?demand hours when the price of electricity is the highest. It is projected that a mature CSP industry of over 4 GWe will be able to reduce the energy cost by about 50% and that U.S. capacity could be 120 GW by 2050.

Mark Mehos

2008-01-01T23:59:59.000Z

289

North Linear Accelerator  

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

North Linear Accelerator North Linear Accelerator Building Exterior Beam Enclosure Level Walk to the North Spreader North Recombiner Extras! North Linear Accelerator The North Linear Accelerator is one of the two long, straight sections of Jefferson Lab's accelerator. Electrons gain energy in this section by passing through acceleration cavities. There are 160 cavities in this straightaway, all lined up end to end. That's enough cavities to increase an electron's energy by 400 million volts each time it passes through this section. Electrons can pass though this section as many as five times! The cavities are powered by microwaves that travel down the skinny rectangular pipes from the service buildings above ground. Since the cavities won't work right unless they are kept very cold, they

290

Syntactic edges and linearization  

E-Print Network (OSTI)

In this thesis, I investigate the question of how the units of a linguistic expression are linearly ordered in syntax. In particular, I examine interactions between locality conditions on movement and the mapping between ...

Ko, Heejeong

2005-01-01T23:59:59.000Z

291

Sandia National Laboratories: Concentrating Solar Power  

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

InstituteSandia Photovoltaic Systems Symposium On April 15, 2014, in Concentrating Solar Power, Distribution Grid Integration, Energy, Facilities, Grid Integration, News,...

292

Concentrating Solar Power: Energy from Mirrors  

SciTech Connect

This fact sheet explains how concentrating solar power technology works and the three types of systems in development today: trough, dish, and central receiver.

Poole, L.

2001-02-27T23:59:59.000Z

293

Sandia National Laboratories: Concentrating Solar Power  

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

Salt Initial Flow Testing is a Tremendous Success On November 2, 2012, in Concentrating Solar Power, News, Renewable Energy, Solar The Molten Salt Test Loop (MSTL ) system at...

294

System and method to create three-dimensional images of non-linear acoustic properties in a region remote from a borehole  

DOE Patents (OSTI)

In some aspects of the disclosure, a method for creating three-dimensional images of non-linear properties and the compressional to shear velocity ratio in a region remote from a borehole using a conveyed logging tool is disclosed. In some aspects, the method includes arranging a first source in the borehole and generating a steered beam of elastic energy at a first frequency; arranging a second source in the borehole and generating a steerable beam of elastic energy at a second frequency, such that the steerable beam at the first frequency and the steerable beam at the second frequency intercept at a location away from the borehole; receiving at the borehole by a sensor a third elastic wave, created by a three wave mixing process, with a frequency equal to a difference between the first and second frequencies and a direction of propagation towards the borehole; determining a location of a three wave mixing region based on the arrangement of the first and second sources and on properties of the third wave signal; and creating three-dimensional images of the non-linear properties using data recorded by repeating the generating, receiving and determining at a plurality of azimuths, inclinations and longitudinal locations within the borehole. The method is additionally used to generate three dimensional images of the ratio of compressional to shear acoustic velocity of the same volume surrounding the borehole.

Vu, Cung; Nihei, Kurt T.; Schmitt, Denis P.; Skelt, Christopher; Johnson, Paul A.; Guyer, Robert; TenCate, James A.; Le Bas, Pierre-Yves

2013-01-01T23:59:59.000Z

295

ARM - Measurement - Organic Carbon Concentration  

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

govMeasurementsOrganic Carbon Concentration govMeasurementsOrganic Carbon Concentration ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Organic Carbon Concentration The concentration of carbon bound in organic compounds. Categories Aerosols Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments ACSM : Aerosol Chemical Speciation Monitor Field Campaign Instruments AEROSCARBON : Aerosol Carbon Analyzer AEROSMASSSPEC : Aerosol Mass Spectrometer Datastreams AOS : Aerosol Observing System Datastreams

296

Linear and angular retroreflecting interferometric alignment target  

DOE Patents (OSTI)

The present invention provides a method and apparatus for measuring both the linear displacement and angular displacement of an object using a linear interferometer system and an optical target comprising a lens, a reflective surface and a retroreflector. The lens, reflecting surface and retroreflector are specifically aligned and fixed in optical connection with one another, creating a single optical target which moves as a unit that provides multi-axis displacement information for the object with which it is associated. This displacement information is useful in many applications including machine tool control systems and laser tracker systems, among others.

Maxey, L. Curtis (Powell, TN)

2001-01-01T23:59:59.000Z

297

The Klynac: An Integrated Klystron and Linear Accelerator  

SciTech Connect

The Klynac concept integrates an electron gun, a radio frequency (RF) power source, and a coupled-cavity linear accelerator into a single resonant system

Potter, J. M., Schwellenbach, D., Meidinger, A.

2012-08-07T23:59:59.000Z

298

Linear Logic as CSP  

Science Journals Connector (OSTI)

......research-article Original Articles Linear Logic as CSP ERIC MONTEIRO Department of Informatics...translation from such proofs into a corresponding CSP process is offered. It is shown that the...between the cut elimination process and the CSP execution. Generalizations and related......

ERIC MONTEIRO

1994-08-01T23:59:59.000Z

299

Linear Programming Environmental  

E-Print Network (OSTI)

Linear Program to control air pollution was developed in 1968 by Teller, which minimized cost Fall 2006 #12;Topics · Introduction · Background · Air · Land · Water #12;Introduction · "The United States spends more than 2% of its gross domestic product on pollution control, and this is more than any

Nagurney, Anna

300

Scattering Solar Thermal Concentrators  

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

is a rendering of a scattering solar concentrator. Light collected by a cylindrical Fresnel lens is focused within a curved glass "guide" sheet, where it is redirected into...

Note: This page contains sample records for the topic "linear concentrator 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

Optimized remedial groundwater extraction using linear programming  

SciTech Connect

Groundwater extraction systems are typically installed to remediate contaminant plumes or prevent further spread of contamination. These systems are expensive to install and maintain. A traditional approach to designing such a wellfield uses a series of trial-and-error simulations to test the effects of various well locations and pump rates. However, the optimal locations and pump rates of extraction wells are difficult to determine when objectives related to the site hydrogeology and potential pumping scheme are considered. This paper describes a case study of an application of linear programming theory to determine optimal well placement and pump rates. The objectives of the pumping scheme were to contain contaminant migration and reduce contaminant concentrations while minimizing the total amount of water pumped and treated. Past site activities at the area under study included disposal of contaminants in pits. Several groundwater plumes have been identified, and others may be present. The area of concern is bordered on three sides by a wetland, which receives a portion of its input budget as groundwater discharge from the pits. Optimization of the containment pumping scheme was intended to meet three goals: (1) prevent discharge of contaminated groundwater to the wetland, (2) minimize the total water pumped and treated (cost benefit), and (3) avoid dewatering of the wetland (cost and ecological benefits). Possible well locations were placed at known source areas. To constrain the problem, the optimization program was instructed to prevent any flow toward the wetland along a user-specified border. In this manner, the optimization routine selects well locations and pump rates so that a groundwater divide is produced along this boundary.

Quinn, J.J.

1995-12-31T23:59:59.000Z

302

ARM - Measurement - Trace gas concentration  

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

govMeasurementsTrace gas concentration govMeasurementsTrace gas concentration ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Trace gas concentration The amount per unit volume of trace gases other than carbon dioxide, ozone and water vapor, typically measured in conjunction with in situ aerosol measurements, e.g. carbon monoxide, nitrogen oxides, sulfur dioxide. Categories Atmospheric Carbon, Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments CO : Carbon Monoxide Mixing Ratio System

303

A Non-linear Reaction-Diffusion System in Propagating Diffusive Wave in Nitroguanidine (NQ) Lens Using Ising-Bloch Bifurcation  

E-Print Network (OSTI)

A wave front propagating through a medium is described using the Ising--Bloch method The reaction-diffusion behaviour of an autocatalysis model of incoming waves from energetic material in a nitroguanidine lens and its interactions with Dirichlet boundaries system are examined. Wave splitting is found to occur for some relative diffusivities through introducing defects into the lens. The system is introduced using a nonlinear method with a Boltzmann--Gibbs distribution of diffusion parameters and forced into a right-hand-side divergence for final analysis. Considering the nonlinearity, the model is expanded by introducing the decomposition kinetics into the set of equations developed.

Mirfayzi, S R

2014-01-01T23:59:59.000Z

304

Free Processes via Matrix Theory Concentration week on free Probability  

E-Print Network (OSTI)

Free Processes via Matrix Theory Concentration week on free Probability Texas A&M, July 9-13. Nizar Demni Paris VI University July 10, 2007 Nizar Demni Paris VI University Free Processes via Matrix Theory Concentration week on free Pr #12;Definitions Non commutative probability space : Unital Algebra A + linear

Anshelevich, Michael

305

Concentration in Green Design  

E-Print Network (OSTI)

, energy, infrastructure or transport. Participants in this specialization area work closely with the GreenConcentration in Green Design Research and Education Opportunities Carnegie Mellon University Civil and Environmental Engineering www.ce.cmu.edu M.S. Concentration Green Design - Course Only Track As an extension

Shewchuk, Jonathan

306

Combustion powered linear actuator  

DOE Patents (OSTI)

The present invention provides robotic vehicles having wheeled and hopping mobilities that are capable of traversing (e.g. by hopping over) obstacles that are large in size relative to the robot and, are capable of operation in unpredictable terrain over long range. The present invention further provides combustion powered linear actuators, which can include latching mechanisms to facilitate pressurized fueling of the actuators, as can be used to provide wheeled vehicles with a hopping mobility.

Fischer, Gary J. (Albuquerque, NM)

2007-09-04T23:59:59.000Z

307

Twenty-First-Century Compatible CO2 Emissions and Airborne Fraction Simulated by CMIP5 Earth System Models under Four Representative Concentration Pathways  

Science Journals Connector (OSTI)

The carbon cycle is a crucial Earth system component affecting climate and atmospheric composition. The response of natural carbon uptake to CO2 and climate change will determine anthropogenic emissions compatible with a target CO2 pathway. For ...

Chris Jones; Eddy Robertson; Vivek Arora; Pierre Friedlingstein; Elena Shevliakova; Laurent Bopp; Victor Brovkin; Tomohiro Hajima; Etsushi Kato; Michio Kawamiya; Spencer Liddicoat; Keith Lindsay; Christian H. Reick; Caroline Roelandt; Joachim Segschneider; Jerry Tjiputra

2013-07-01T23:59:59.000Z

308

Positive energy quantization of linear dynamics  

E-Print Network (OSTI)

The abstract mathematical structure behind the positive energy quantization of linear classical systems is described. It is separated into 3 stages: the description of a classical system, the algebraic quantization and the Hilbert space quantization. 4 kinds of systems are distinguished: neutral bosonic, neutral bosonic, charged bosonic and charged fermionic. The formalism that is described follows closely the usual constructions employed in quantum physics to introduce non-interacting quantum fields.

Derezinski, Jan

2009-01-01T23:59:59.000Z

309

6.4 Composition and invertibility of linear transformations  

E-Print Network (OSTI)

number of reflections is a reflection composed with a rotation. #12; Yaw: z-axis (up direction), pitch and ). See Example 5. Conversely, any rotation can be factored into yaw, pitch, roll rotations. #12; We wish=Ax given by a linear system as in (18). We have x=A-1y given by a linear system. We can obtain the second

Choi, Suhyoung

310

Proof-of-Principle Detonation Driven, Linear Electric Generator Facility  

E-Print Network (OSTI)

Proof-of-Principle Detonation Driven, Linear Electric Generator Facility Eric M. Braun, Frank K. Lu is described in which a detonation-driven piston system has been integrated with a linear generator in order in a single mass, two-spring system where the detonation wave pressure may be modeled as a variable force

Texas at Arlington, University of

311

World's Largest Concentrating Solar Power Plant Opens in California  

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

The Ivanpah Solar Electric Generating System, the world’s largest concentrating solar power plant, officially opened on February 13.

312

Diode laser-based sensor system for long-path absorption measurements of atmospheric concentration and near-IR molecular spectral parameters  

SciTech Connect

Line-locked near-IR diode lasers and a simple retroreflector/telescope system were used for remote sensing of atmospheric constituents over long atmospheric paths. The experimental configuration used in preliminary measurements of atmospheric water vapor and oxygen with AlGaAs diode lasers is presented. A prototype field sensor system currently under development shares the same basic configuration but incorporates interchangeable AlGaAs and InGaAsP diode-laser modules for monitoring a variety of atmospheric gases.

Goldstein, N.; Lee, J.; Adler-Golden, S.M.; Bien, F.

1993-12-31T23:59:59.000Z

313

Optimization of Stationary Concentrators  

Science Journals Connector (OSTI)

In this chapter, the main characteristics of stationary nonimaging solar concentrators are optimized in respect of the latitude of their installation and the direct fraction of solar radiation incident on the ...

Dr. Ralf Leutz; Dr. Akio Suzuki

2001-01-01T23:59:59.000Z

314

Concentrator silicon cell research  

SciTech Connect

This project continued the developments of high-efficiency silicon concentrator solar cells with the goal of achieving a cell efficiency in the 26 to 27 percent range at a concentration level of 150 suns of greater. The target efficiency was achieved with the new PERL (passivated emitter, rear locally diffused) cell structure, but only at low concentration levels around 20 suns. The PERL structure combines oxide passivation of both top and rear surfaces of the cells with small area contact to heavily doped regions on the top and rear surfaces. Efficiency in the 22 to 23 percent range was also demonstrated for large-area concentrator cells fabricated with the buried contact solar cell processing sequence, either when combined with prismatic covers or with other innovative approaches to reduce top contact shadowing. 19 refs.

Green, M.A.; Wenham, S.R.; Zhang, F.; Zhao, J.; Wang, A. [New South Wales Univ., Kensington (Australia). Solar Photovoltaic Lab.

1992-04-01T23:59:59.000Z

315

Concentrated Thermoelectric Power  

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

and night using no moving parts at both the utility and distributed scale. Concentrating Solar Power MASSACHUSETTS INSTITUTE OF TECHNOLOGY PROGRAM: SunShot CSP R&D 2012 TOPIC:...

316

SunShot Initiative: National Laboratory Concentrating Solar Power Research  

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

National Laboratory Concentrating National Laboratory Concentrating Solar Power Research to someone by E-mail Share SunShot Initiative: National Laboratory Concentrating Solar Power Research on Facebook Tweet about SunShot Initiative: National Laboratory Concentrating Solar Power Research on Twitter Bookmark SunShot Initiative: National Laboratory Concentrating Solar Power Research on Google Bookmark SunShot Initiative: National Laboratory Concentrating Solar Power Research on Delicious Rank SunShot Initiative: National Laboratory Concentrating Solar Power Research on Digg Find More places to share SunShot Initiative: National Laboratory Concentrating Solar Power Research on AddThis.com... Concentrating Solar Power Systems Components Competitive Awards CSP Research & Development Thermal Storage

317

Repair of overheating linear accelerator  

SciTech Connect

Los Alamos Neutron Science Center (LANSCE) is a proton accelerator that produces high energy particle beams for experiments. These beams include neutrons and protons for diverse uses including radiography, isotope production, small feature study, lattice vibrations and material science. The Drift Tube Linear Accelerator (DTL) is the first portion of a half mile long linear section of accelerator that raises the beam energy from 750 keV to 100 MeV. In its 31st year of operation (2003), the DTL experienced serious issues. The first problem was the inability to maintain resonant frequency at full power. The second problem was increased occurrences of over-temperature failure of cooling hoses. These shortcomings led to an investigation during the 2003 yearly preventative maintenance shutdown that showed evidence of excessive heating: discolored interior tank walls and coper oxide deposition in the cooling circuits. Since overheating was suspected to be caused by compromised heat transfer, improving that was the focus of the repair effort. Investigations revealed copper oxide flow inhibition and iron oxide scale build up. Acid cleaning was implemented with careful attention to protection of the base metal, selection of components to clean and minimization of exposure times. The effort has been very successful in bringing the accelerator through a complete eight month run cycle allowing an incredible array of scientific experiments to be completed this year (2003-2004). This paper will describe the systems, investigation analysis, repair, return to production and conclusion.

Barkley, Walter; Baldwin, William; Bennett, Gloria; Bitteker, Leo; Borden, Michael; Casados, Jeff; Fitzgerald, Daniel; Gorman, Fred; Johnson, Kenneth; Kurennoy, Sergey; Martinez, Alberto; O’Hara, James; Perez, Edward; Roller, Brandon; Rybarcyk, Lawrence; Stark, Peter; Stockton, Jerry

2004-01-01T23:59:59.000Z

318

Joined concentric tubes  

DOE Patents (OSTI)

Tubular objects having two or more concentric layers that have different properties are joined to one another during their manufacture primarily by compressive and friction forces generated by shrinkage during sintering and possibly mechanical interlocking. It is not necessary for the concentric tubes to display adhesive-, chemical- or sinter-bonding to each other in order to achieve a strong bond. This facilitates joining of dissimilar materials, such as ceramics and metals.

DeJonghe, Lutgard; Jacobson, Craig; Tucker, Michael; Visco, Steven

2013-01-01T23:59:59.000Z

319

History of Proton Linear Accelerators  

E-Print Network (OSTI)

the board to show why the accelerator couldn't work. Then atmuch. References 1. Linear Accelerators, edited by P. M .at the 1986 Linear Accelerator Conference, SLAC, Stanford,

Alvarez, Luis W.

1986-01-01T23:59:59.000Z

320

Requirements for a Concentration in Energy Technologies  

E-Print Network (OSTI)

Technologies ­ 4 cr ENG EC 417 ­ Electric Energy Systems: Adapting to Renewable Resources ­ 4 cr Additional* - Methods of Environmental Policy ­ 4 cr ENG ME 533 ­ Energy Conversion ­ 4 cr ENG EC/ME/SE 543Requirements for a Concentration in Energy Technologies The concentration in Energy Technologies

Note: This page contains sample records for the topic "linear concentrator 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

History of Proton Linear Accelerators  

DOE R&D Accomplishments (OSTI)

Some personal recollections are presented that relate to the author`s experience developing linear accelerators, particularly for protons. (LEW)

Alvarez, L. W.

1987-01-00T23:59:59.000Z

322

Reticle stage based linear dosimeter  

DOE Patents (OSTI)

A detector to measure EUV intensity employs a linear array of photodiodes. The detector is particularly suited for photolithography systems that includes: (i) a ringfield camera; (ii) a source of radiation; (iii) a condenser for processing radiation from the source of radiation to produce a ringfield illumination field for illuminating a mask; (iv) a reticle that is positioned at the ringfield camera's object plane and from which a reticle image in the form of an intensity profile is reflected into the entrance pupil of the ringfield camera, wherein the reticle moves in a direction that is transverse to the length of the ringfield illumination field that illuminates the reticle; (v) detector for measuring the entire intensity along the length of the ringfield illumination field that is projected onto the reticle; and (vi) a wafer onto which the reticle imaged is projected from the ringfield camera.

Berger, Kurt W. (Livermore, CA)

2007-03-27T23:59:59.000Z

323

On extreme Bosonic linear channels  

E-Print Network (OSTI)

The set of all channels with fixed input and output is convex. We first give a convenient formulation of necessary and sufficient condition for a channel to be extreme point of this set in terms of complementary channel, a notion of big importance in quantum information theory. This formulation is based on the general approach to extremality of completely positive maps in an operator algebra due to Arveson. We then apply this formulation to prove the main result of this note: under certain nondegeneracy conditions, purity of the environment is necessary and sufficient for extremality of Bosonic linear (quasi-free) channel. It follows that Gaussian channel between finite-mode Bosonic systems is extreme if and only if it has minimal noise.

A. S. Holevo

2011-11-15T23:59:59.000Z

324

Thermodynamic modeling of neptunium(V) solubility in concentrated Na-CO{sub 3}-HCO{sub 3}-Cl-ClO{sub 4}-H-OH-H{sub 2}O systems  

SciTech Connect

Safety assessments of nuclear waste repositories often require estimation of actinide solubilities as a function of groundwater composition. Although considerable amount of research has been done on the solubility and speciation of actinides, relatively little has been done to unify these data into a model applicable to concentrate brines. Numerous authors report data on the aqueous chemical properties of Np(V) in NaClO{sub 4}, Na{sub 2}CO{sub 3}, and NaCl media, but a consistent thermodynamic model for predicting these properties is not available. To meet this need, a model was developed to describe the solubility of Np(V) in Na-Cl-ClO{sub 4}-CO{sub 3} aqueous systems, based on the Pitzer activity coefficient formalism for concentrated electrolytes. Hydrolysis and/or carbonate complexation are the dominant aqueous reactions with neptunyl in these systems. Literature data for neptunyl extraction and solubility, and solubility data that the authors developed, are used to parameterize an integrated model for Np(V) solubility in the Np(V)-Na-CO{sub 3}-HCO{sub 3}-Cl-ClO{sub 4}-H-OH-H{sub 2}O system. The resulting model is tested against additional solubility data, and compared with Np(V) solubility experiments in complex synthetic brines.

Novak, C.F. [Sandia National Labs., Albuquerque, NM (United States); Roberts, K.E. [Lawrence Berkeley Lab., CA (United States)

1994-10-01T23:59:59.000Z

325

Project Profile: Scattering Solar Thermal Concentrators  

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

Pennsylvania State University, under the 2012 SunShot Concentrating Solar Power (CSP) R&D FOA, is designing and testing a novel solar collector system that relies on stationary optics, avoiding the need for mirror movement. The system is capable of achieving optical performance equal to state-of-the-art parabolic trough systems, but at a lower cost.

326

An Automated System for the Measurement of Nitrogen Oxides and Ozone Concentrations from a Passenger Aircraft:? Instrumentation and First Results of the NOXAR Project  

Science Journals Connector (OSTI)

Exhaust gas from the analyzer is drawn through a thermal ozone scrubber (ECO PHYSICS) and into the vacuum pump (P1 in Figures 1 and 3). ... The individual capacity of each one of the 110 W fans (2100 m3/h in free air) is sufficient to ensure that the rack will not overheat even if the other should malfunction. ... Photolysis rates were calculated for clear-sky conditions from all daytime NO and O3 measurements at solar zenith angles <85° using the STAR (system for transfer of atmospheric radiation) model (27). ...

Peter Dias-Lalcaca; Dominik Brunner; Walter Imfeld; Werner Moser; Johannes Staehelin

1998-09-04T23:59:59.000Z

327

Future trends in environmental mercury concentrations: implications  

E-Print Network (OSTI)

Future trends in environmental mercury concentrations: implications for prevention strategies interactions among natural and human climate system components; objectively assess uncertainty in economic, monitor and verify greenhouse gas emissions and climatic impacts. This reprint is one of a series intended

328

Effect of concentration polarization on permselectivity  

E-Print Network (OSTI)

In this paper, the variation of permselectivity in the course of concentration polarization is systematically analyzed for a three-layer membrane system consisting of a nonperfectly permselective ion exchange membrane, ...

abu-Rjal, Ramadan

329

Photovoltaic solar concentrator  

DOE Patents (OSTI)

A photovoltaic solar concentrator is disclosed with one or more transverse-junction solar cells (also termed point contact solar cells) and a lens located above each solar cell to concentrate sunlight onto the solar cell to generate electricity. Piezoelectric actuators tilt or translate each lens to track the sun using a feedback-control circuit which senses the electricity generated by one or more of the solar cells. The piezoelectric actuators can be coupled through a displacement-multiplier linkage to provide an increased range of movement of each lens. Each lens in the solar concentrator can be supported on a frame (also termed a tilt plate) having three legs, with the movement of the legs being controlled by the piezoelectric actuators.

Nielson, Gregory N.; Okandan, Murat; Resnick, Paul J.; Cruz-Campa, Jose Luis

2012-12-11T23:59:59.000Z

330

A robustness application for linear estimation  

E-Print Network (OSTI)

, recursive algorithm for yielding estimates of the state of a linear dynamic system (see, for example, the excellent tutorial [1]). Many other applications of this estimation scheme exist in the areas of signal processing, power systems, telecommunications... on robustness causes the coefficient which maximizes J to approach the coefficient which produces maximum robustness. 37 REFERENCES [1] I. B. Rhodes, "A Tutorial Introduction to Estimation and Filtering, "IEEE Trans. on Automatic Control, vol. AC-16, pp...

Kitzman, Kenneth Victor

1990-01-01T23:59:59.000Z

331

Scandium nitrate-nitric acid-water-tributyl phosphate system. III. IR spectra of scandium extracts from concentrated nitric acid solutions  

SciTech Connect

Equilibrium organic phases in extraction systems consisting of tributyl phosphate (TBP) (neat or 1 M in CCl{sub 4}) and 8-12 M nitric acid containing scandium or scandium-free have been studied by IR spectroscopy. Extracted complex contains 3, 4, or 5 nitric acid molecules per Sc atom in the case of extraction from 8.3, 10.9, and 12.2 M HNO{sub 3}, respectively, and corresponds to the formula Sc(NO{sub 3}){sub 3}{center_dot}mHNO{sub 3}{center_dot}3TBP. Nitric acid molecules are incorporated into extracted complex via H-bond between oxygen atom of coordinated nitrate ion and acid proton.

Nikitina, G.P.; Egorova, V.P.; Listopadov, A.A. [Khlopin Radium Institute, St. Petersburg (Russian Federation)] [and others

1995-03-01T23:59:59.000Z

332

Concentrating Solar Power Basics | Department of Energy  

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

Basics Basics Concentrating Solar Power Basics August 20, 2013 - 4:38pm Addthis Text Version This solar concentrator has a fixed-focus faceted dish with a concentration of about 250 suns. This system can be used for large fields connected to the utility grid, hydrogen generation, or water pumping. Credit: Science Applications International Corporation / PIX 13464 Concentrating solar power (CSP) technologies use mirrors to reflect and concentrate sunlight onto receivers that collect solar energy and convert it to heat. This thermal energy can then be used to produce electricity via a steam turbine or heat engine that drives a generator. Concentrating solar power offers a utility-scale, firm, dispatchable renewable energy option that can help meet our nation's demand for

333

Utility-Scale Concentrating Solar Power and Photovoltaic Projects: A Technology and Market Overview  

SciTech Connect

Over the last several years, solar energy technologies have been, or are in the process of being, deployed at unprecedented levels. A critical recent development, resulting from the massive scale of projects in progress or recently completed, is having the power sold directly to electric utilities. Such 'utility-scale' systems offer the opportunity to deploy solar technologies far faster than the traditional 'behind-the-meter' projects designed to offset retail load. Moreover, these systems have employed significant economies of scale during construction and operation, attracting financial capital, which in turn can reduce the delivered cost of power. This report is a summary of the current U.S. utility-scale solar state-of-the-market and development pipeline. Utility-scale solar energy systems are generally categorized as one of two basic designs: concentrating solar power (CSP) and photovoltaic (PV). CSP systems can be further delineated into four commercially available technologies: parabolic trough, central receiver (CR), parabolic dish, and linear Fresnel reflector. CSP systems can also be categorized as hybrid, which combine a solar-based system (generally parabolic trough, CR, or linear Fresnel) and a fossil fuel energy system to produce electric power or steam.

Mendelsohn, M.; Lowder, T.; Canavan, B.

2012-04-01T23:59:59.000Z

334

Free piston variable-stroke linear-alternator generator  

DOE Patents (OSTI)

A free-piston variable stroke linear-alternator AC power generator for a combustion engine is described. An alternator mechanism and oscillator system generates AC current. The oscillation system includes two oscillation devices each having a combustion cylinder and a flying turnbuckle. The flying turnbuckle moves in accordance with the oscillation device. The alternator system is a linear alternator coupled between the two oscillation devices by a slotted connecting rod. 8 figs.

Haaland, C.M.

1998-12-15T23:59:59.000Z

335

Linear plasma-based tritium production facility  

SciTech Connect

The concept presented here is an adaptation of a recently completed conceptual design of a compact high-fluence D-T neutron source for accelerated end-of-life testing of fusion reactor materials. Although this preliminary assessment serves to illustrate the main features of a linear plasma-based tritium breeder, it is not necessarily an optimized design. We believe that proper design choices for the breeder application will certainly reduce costs, perhaps as much as a factor of two. We also point out that Q (the ratio of fusion power produced to power input to the plasma) increases with system length and that the cost per kg of tritium decreases for longer systems with higher output. In earlier studies of linear two-component plasma systems, Q values as high as three were predicted. At this level of performance and with energy recovery, operating power requirements of the breeder could approach zero. 5 refs., 1 fig., 1 tab.

Coensgen, F.H.; Futch, A.H.; Molvik, A.W.

1989-02-15T23:59:59.000Z

336

Photovoltaic concentrator technology development project. Sixth project integration meeting  

SciTech Connect

Thirty-three abstracts and short papers are presented which describe the current status of research, development, and demonstration of concentrator solar cell technology. Solar concentrators discussed include the parabolic trough, linear focus Fresnel lens, point focus Fresnel lens, and the parabolic dish. Solar cells studied include silicon, GaAs, and AlGaAs. Research on multiple junction cells, combined photovoltaic/thermal collectors, back contact solar cells, and beam splitter modules is described. Concentrator solar cell demonstration programs are reported. Contractor status summaries are given for 33 US DOE concentrator solar cell contracts; a description of the project, project status, and key results to date is included. (WHK)

None

1980-10-01T23:59:59.000Z

337

Linear and Non Linear Analysis of the Hadley Circulation  

Science Journals Connector (OSTI)

We present a synthesis of results obtained with the linear stability of the one-cell Hadley circulation. This flow is observe in the...

P. Laure; B. Roux

1990-01-01T23:59:59.000Z

338

Berkeley Proton Linear Accelerator  

DOE R&D Accomplishments (OSTI)

A linear accelerator, which increases the energy of protons from a 4 Mev Van de Graaff injector, to a final energy of 31.5 Mev, has been constructed. The accelerator consists of a cavity 40 feet long and 39 inches in diameter, excited at resonance in a longitudinal electric mode with a radio-frequency power of about 2.2 x 10{sup 6} watts peak at 202.5 mc. Acceleration is made possible by the introduction of 46 axial "drift tubes" into the cavity, which is designed such that the particles traverse the distance between the centers of successive tubes in one cycle of the r.f. power. The protons are longitudinally stable as in the synchrotron, and are stabilized transversely by the action of converging fields produced by focusing grids. The electrical cavity is constructed like an inverted airplane fuselage and is supported in a vacuum tank. Power is supplied by 9 high powered oscillators fed from a pulse generator of the artificial transmission line type.

Alvarez, L. W.; Bradner, H.; Franck, J.; Gordon, H.; Gow, J. D.; Marshall, L. C.; Oppenheimer, F. F.; Panofsky, W. K. H.; Richman, C.; Woodyard, J. R.

1953-10-13T23:59:59.000Z

339

Derived Concentration Technical Standard  

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

196-2011 196-2011 April 2011 DOE STANDARD DERIVED CONCENTRATION TECHNICAL STANDARD U.S. Department of Energy AREA ENVR Washington, D.C. 20585 Not Measurement Sensitive This document is available on the Department of Energy Technical Standards Program Web Site at http://www.hss.doe.gov/nuclearsafety/ns/techstds/standard/standard.html DOE-STD-1196-2011 ACKNOWLEDGEMENTS This Derived Concentration Technical Standard was a collaborative effort sponsored by the DOE Office of Environmental Policy and Assistance, with support from Department subject matter experts (SMEs) in the field of radiation protection. This standard, which complements DOE Order (O) 458.1, Radiation Protection of the Public and the Environment, was developed taking

340

Faster PDE-based simulations using robust composite linear solvers  

Science Journals Connector (OSTI)

Many large-scale scientific simulations require the solution of nonlinear partial differential equations (PDEs). The effective solution of such nonlinear PDEs depends to a large extent on efficient and robust sparse linear system solution. In this paper, ... Keywords: Newton-Krylov methods, composite methods, large-scale PDE-based simulations, multi-algorithms, sparse linear solution

S. Bhowmick; P. Raghavan; L. McInnes; B. Norris

2004-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "linear concentrator 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

Applications of Polyparameter Linear Free Energy Relationships in Environmental Chemistry  

Science Journals Connector (OSTI)

Applications of Polyparameter Linear Free Energy Relationships in Environmental Chemistry ... Polyparameter linear free energy relationships (PP-LFERs) have been proven to be useful to characterize the equilibrium partitioning of organic chemicals in various environmental and technical partitioning systems and predict the respective partition coefficients. ...

Satoshi Endo; Kai-Uwe Goss

2014-10-03T23:59:59.000Z

342

Drift tube suspension for high intensity linear accelerators  

DOE Patents (OSTI)

The disclosure relates to a drift tube suspension for high intensity linear accelerators. The system comprises a series of box-sections girders independently adjustably mounted on a linear accelerator. A plurality of drift tube holding stems are individually adjustably mounted on each girder.

Liska, Donald J. (Los Alamos, NM); Schamaun, Roger G. (Los Alamos, NM); Clark, Donald C. (Los Alamos, NM); Potter, R. Christopher (Los Alamos, NM); Frank, Joseph A. (Los Alamos, NM)

1982-01-01T23:59:59.000Z

343

Drift tube suspension for high intensity linear accelerators  

DOE Patents (OSTI)

The disclosure relates to a drift tube suspension for high intensity linear accelerators. The system comprises a series of box-sections girders independently adjustably mounted on a linear accelerator. A plurality of drift tube holding stems are individually adjustably mounted on each girder.

Liska, D.J.; Schamaun, R.G.; Clark, D.C.; Potter, R.C.; Frank, J.A.

1980-03-11T23:59:59.000Z

344

Variable-energy drift-tube linear accelerator  

DOE Patents (OSTI)

A linear accelerator system includes a plurality of post-coupled drift-tubes wherein each post coupler is bistably positionable to either of two positions which result in different field distributions. With binary control over a plurality of post couplers, a significant accumlative effect in the resulting field distribution is achieved yielding a variable-energy drift-tube linear accelerator.

Swenson, Donald A. (Los Alamos, NM); Boyd, Jr., Thomas J. (Los Alamos, NM); Potter, James M. (Los Alamos, NM); Stovall, James E. (Los Alamos, NM)

1984-01-01T23:59:59.000Z

345

Precise and accurate determination of boron concentration in silicate rocks by direct isotope dilution ICP-MS: Insights into the B budget of the mantle and B behavior in magmatic systems  

Science Journals Connector (OSTI)

Abstract We determine the bulk boron concentration of silicate rocks using a new method that does not require sample evaporation. After spiking (10B enriched NIST SRM 952) and HF attack, the rock solution is directly aspirated into the ICP-MS, and B concentration is determined by isotopic dilution. This technique is applied to samples with B contents in the range of 0.1–30 ppm. The very low blank (boron during mantle melting and enrichment processes (i.e. metasomatism), and to estimate the primitive mantle B content (0.26 ± 0.04 ppm), while the lava data allows us to quantify B loss due to magmatic degassing (between 10 and 30%), using the composition of a primitive melt inclusion as the reference for an initial magma composition. Our knowledge of the degassing history of the samples allows us to quantify loss during lava emplacement and cooling (4–10%), continuous open-system degassing (10%) and shallow closed-system degassing (5–8%). Our results indicate that 1) B abundances of ocean island basalts are ca. 60–75% less than estimates based on elements with similar incompatibility (e.g., Nb and Ta), 2) this deficiency could reflect source depletion and/or magmatic degassing, and 3) magma degassing accounts for less than half of the inferred boron anomaly seen on primitive mantle-normalized patterns, implying that the mantle sources of ocean island basalts must be depleted in boron. The robust technique presented in this study could provide useful constraints on boron distribution within the Earth's mantle as well as on its behavior in magmatic systems.

G. Menard; I. Vlastélic; D.A. Ionov; E.F. Rose-Koga; J.-L. Piro; C. Pin

2013-01-01T23:59:59.000Z

346

Unit I-3 Linear Independence & Bases 1 Linear independence & bases  

E-Print Network (OSTI)

} ­ so we can write u1 = c2u2 + c3u3 + ... + crur with not all ci = 0 ­ re-arranging gives a non-zero lc u1 - c2u2 - c3u3 - ... - crur = 0 so the vectors are linearly dependent ! Unit I-3 Linear

Birkett, Stephen

347

Numerical solution of linear Fredholm fuzzy integral equations of the second kind by Adomian method  

Science Journals Connector (OSTI)

Using parametric form of fuzzy numbers we convert a linear fuzzy Fredholm integral equation of the second kind to a linear system of integral equations of the second kind in crisp case. We use Adomian method and find the approximate solution of this ... Keywords: Adomian method, Fuzzy integral equations, System of linear Fredholm integral equations of the second kind

E. Babolian, H.Sadeghi Goghary, S. Abbasbandy

2005-02-01T23:59:59.000Z

348

Definition: Concentrating solar power | Open Energy Information  

Open Energy Info (EERE)

Dictionary.png Dictionary.png Concentrating solar power Technologies that use mirrors to reflect and concentrate sunlight onto receivers that collect solar energy and convert it to heat. This thermal energy can then be used to produce electricity via a steam turbine or heat engine that drives a generator.[1][2] View on Wikipedia Wikipedia Definition . ]] File:El-v-01 ubt. jpeg Sustainable energy Renewable energy Anaerobic digestion Hydroelectricity · Geothermal Microgeneration · Solar Tidal · Wave · Wind Energy conservation Cogeneration · Energy efficiency Geothermal heat pump Green building · Passive Solar Sustainable transport Plug-in hybrids · Electric vehicles File:Terra- edge blur. png Environment Portal v · d · e Concentrated solar power (also called concentrating solar power, concentrated solar thermal, and CSP) systems use

349

Power Amplifier Linearization Techniques  

E-Print Network (OSTI)

: Cartesian Feedback H(s) H(s) PA sint cost sint cost - - I Q #12;Major design consideration in CFB systems: phase alignment PA sint cost sin(t+) cos(t+) Leff = H(s)cos + [H(s)sin]2 1+H(s)cos #12;CFB Strengths

Dawson, Joel

350

Preconditioning for the mixed formulation of linear plane elasticity  

E-Print Network (OSTI)

. An overlapping Schwarz preconditioner and a multigrid preconditioner for the discrete system are developed and analyzed. We start by introducing the mixed formulation (stress-displacement formulation) for the linear plane elasticity problem and its discretization...

Wang, Yanqiu

2005-11-01T23:59:59.000Z

351

Optimization of a dual acting, magnetically driven, linear actuator  

E-Print Network (OSTI)

In this study the geometry of a dual acting, magnetically driven, linear motion actuator will be optimized. This will be accomplished by modeling the system through a set of differential equations to be solved in Matlab. An ANSYS finite element...

Willerton, Justin Ryan

2012-06-07T23:59:59.000Z

352

The viscoelastic properties of linear-star blends  

E-Print Network (OSTI)

In order to understand the nature of polydispersity and characterize the effect of branching architecture, the model blend of linear and star polymer, which is the simplest branched polymer, is contrived. In this blend system, chain dynamics...

Lee, Jung Hun

2000-01-01T23:59:59.000Z

353

A simple preconditioner for the SIPG discretization of linear elasticity equations  

Science Journals Connector (OSTI)

We deal with the solution of the systems of linear algebraic equations arising from Symmetric Interior Penalty discontinuous Galerkin (SIPG) discretization of linear elasticity problems in primal (displacement) formulation. The main focus of the paper ...

B. Ayuso; I. Georgiev; J. Kraus; L. Zikatanov

2010-08-01T23:59:59.000Z

354

NREL: Concentrating Solar Power Research - Publications  

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

Publications Publications NREL develops publications, including technical reports and papers, about its R&D activities in concentrating solar power, as well as related information. Below you'll find a list of selected NREL publications concerning these activities. Also see TroughNet's publications on parabolic trough technology, and market and economic assessment. For other NREL concentrating solar power publications, you can search NREL's Publications Database. Selected Publications These publications are available as Adobe Acrobat PDFs. Utility-Scale Power Tower Solar Systems: Performance Acceptance Test Guidelines NREL Subcontract Report Author: David Kearney - Kearney & Associates Publication Date: March 2013 Simulating the Value of Concentrating Solar Power with Thermal Energy

355

NREL: Concentrating Solar Power Research Home Page  

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

A collage of Concentrating Solar Power photographs. The first photo shows a dish-engine solar system. The second is of a SAIC Stirling dish collector. And the third photo shows a SkyTrough solar concentrator located on a mesa top. A collage of Concentrating Solar Power photographs. The first photo shows a dish-engine solar system. The second is of a SAIC Stirling dish collector. And the third photo shows a SkyTrough solar concentrator located on a mesa top. NREL collaborates with industry to further the research and development (R&D) of concentrating solar power (CSP) plant and solar thermal technologies. NREL's projects in concentrating solar power focus on components R&D and systems analysis related to power tower and parabolic trough technologies: Collectors Receivers Power block Thermal energy storage Analysis. In addition, NREL has received funding through the following competitively awarded projects: 10-megawatt supercritical carbon dioxide (s-CO2) turbine test Near-blackbody, enclosed-particle receiver integrated with a

356

Solar refractive secondary concentrator technology overview  

Science Journals Connector (OSTI)

Refractive secondary concentrators coupled with advanced primary concentrators can efficiently convert solar energy to heat for a wide variety of space applications including power generation thermal propulsion and furnaces. These applications typically require very high temperatures (as high as 2000 K) and high concentration ratios (10 000 to 1). To enable concentration systems that meet these requirements the NASA Glenn Research Center is developing the refractive secondary concentrator which uses refraction and total internal reflection to concentrate and direct solar energy. Presented is an overview of the refractive secondary concentrator technology development effort including a description of benefits past accomplishments and future plans. Highlighted is a recent proof-of-concept test of a prototype sapphire refractive secondary concentrator performed in a solar vacuum environment that demonstrated throughput efficiency of 87%. It is anticipated that the application of an optical coating to the inlet surface of the refractive secondary to reduce the reflection losses at this surface can improve the throughput efficiency to 93%. Plans to conduct additional solar thermal vacuum tests to demonstrate high temperatures and high throughput power are also presented (up to 2000 K and 5 kW).

Wayne A. Wong

2001-01-01T23:59:59.000Z

357

Concentration dependence of rheological properties of telechelic associative polymer solutions  

Science Journals Connector (OSTI)

We consider concentration dependence of rheological properties of associative telechelic polymer solutions. Experimental results for model telechelic polymer solutions show rather strong concentration dependence of rheological properties. For solutions with relatively high concentrations, linear viscoelasticity deviates from the single Maxwell behavior. The concentration dependence of characteristic relaxation time and moduli is different in high- and low-concentration cases. These results suggest that there are two different concentration regimes. We expect that densely connected (well percolated) networks are formed in high-concentration solutions, whereas sparsely connected (weakly percolated) networks are formed in low-concentration solutions. We propose single chain type transient network models to explain experimental results. Our models incorporate the spatial correlation effect of micellar cores and average number of elastically active chains per micellar core (the network functionality). Our models can reproduce nonsingle Maxwellian relaxation and nonlinear rheological behavior such as the shear thickening and thinning. They are qualitatively consistent with experimental results. In our models, the linear rheological behavior is mainly attributable to the difference of network structures (functionalities). The nonlinear rheological behavior is attributable to the nonlinear flow rate dependence of the spatial correlation of micellar core positions.

Takashi Uneyama; Shinya Suzuki; Hiroshi Watanabe

2012-09-06T23:59:59.000Z

358

Non-linear dark energy clustering  

SciTech Connect

We consider a dark energy fluid with arbitrary sound speed and equation of state and discuss the effect of its clustering on the cold dark matter distribution at the non-linear level. We write the continuity, Euler and Poisson equations for the system in the Newtonian approximation. Then, using the time renormalization group method to resum perturbative corrections at all orders, we compute the total clustering power spectrum and matter power spectrum. At the linear level, a sound speed of dark energy different from that of light modifies the power spectrum on observationally interesting scales, such as those relevant for baryonic acoustic oscillations. We show that the effect of varying the sound speed of dark energy on the non-linear corrections to the matter power spectrum is below the per cent level, and therefore these corrections can be well modelled by their counterpart in cosmological scenarios with smooth dark energy. We also show that the non-linear effects on the matter growth index can be as large as 10–15 per cent for small scales.

Anselmi, Stefano; Ballesteros, Guillermo [Dipartimento di Fisica ''G. Galilei'', Università degli Studi di Padova, via Marzolo 8, I-35131 Padua (Italy); Pietroni, Massimo, E-mail: anselmi@pd.infn.it, E-mail: ballesteros@pd.infn.it, E-mail: pietroni@pd.infn.it [INFN — Sezione di Padova, via Marzolo 8, I-35131 Padua (Italy)

2011-11-01T23:59:59.000Z

359

SunShot Initiative: CSP Systems Research and Development  

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

CSP Systems Research and CSP Systems Research and Development to someone by E-mail Share SunShot Initiative: CSP Systems Research and Development on Facebook Tweet about SunShot Initiative: CSP Systems Research and Development on Twitter Bookmark SunShot Initiative: CSP Systems Research and Development on Google Bookmark SunShot Initiative: CSP Systems Research and Development on Delicious Rank SunShot Initiative: CSP Systems Research and Development on Digg Find More places to share SunShot Initiative: CSP Systems Research and Development on AddThis.com... Concentrating Solar Power Systems Parabolic Trough Linear Fresnel Power Tower Dish Engine Components Competitive Awards Staff Photovoltaics Systems Integration Balance of Systems CSP Systems Research and Development The SunShot Initiative concentrating solar power (CSP) program funds

360

NREL: Energy Analysis - Concentrating Solar Power Results - Life Cycle  

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

Concentrating Solar Power Results - Life Cycle Assessment Harmonization Concentrating Solar Power Results - Life Cycle Assessment Harmonization Life Cycle Greenhouse Gas Emissions from Concentrating Solar Power (Factsheet) Cover of the Life Cycle Greenhouse Gas Emissions from Concentrating Solar Power Download the Factsheet Flowchart that shows the life cycle stages for concentrating solar power systems. For help reading this chart, please contact the webmaster. Figure 1. Process flow diagram illustrating the life cycle stages for concentrating solar power (CSP) systems. The yellow box defined by the grey line shows the systems boundaries assumed in harmonization. Enlarge image NREL developed and applied a systematic approach to review literature on life cycle assessments of concentrating solar power (CSP) systems, identify

Note: This page contains sample records for the topic "linear concentrator 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

Concentrating Solar Power: Technology Overview  

SciTech Connect

Concentrating Solar Power (CSP) has the potential to contribute significantly to the generation of electricity by renewable energy resources in the U.S.. Thermal storage can extend the duty cycle of CSP beyond daytime hours to early evening where the value of electricity is often the highest. The potential solar resource for the southwest U.S. is identified, along with the need to add power lines to bring the power to consumers. CSP plants in the U.S. and abroad are described. The CSP cost of electricity at the busbar is discussed. With current incentives, CSP is approaching competiveness with conventional gas-fired systems during peak-demand hours when the price of electricity is the highest. It is projected that a mature CSP industry of over 4 GWe will be able to reduce the energy cost by about 50%, and that U.S. capacity could be 120 GW by 2050.

Mehos, M.

2008-01-01T23:59:59.000Z

362

Position sensor for linear synchronous motors employing halbach arrays  

DOE Patents (OSTI)

A position sensor suitable for use in linear synchronous motor (LSM) drive systems employing Halbach arrays to create their magnetic fields is described. The system has several advantages over previously employed ones, especially in its simplicity and its freedom from being affected by weather conditions, accumulated dirt, or electrical interference from the LSM system itself.

Post, Richard Freeman

2014-12-23T23:59:59.000Z

363

Resonance-shifting luminescent solar concentrators  

DOE Patents (OSTI)

An optical system and method to overcome luminescent solar concentrator inefficiencies by resonance-shifting, in which sharply directed emission from a bi-layer cavity into a glass substrate returns to interact with the cavity off-resonance at each subsequent reflection, significantly reducing reabsorption loss en route to the edges. In one embodiment, the system comprises a luminescent solar concentrator comprising a transparent substrate, a luminescent film having a variable thickness; and a low refractive index layer disposed between the transparent substrate and the luminescent film.

Giebink, Noel Christopher; Wiederrecht, Gary P; Wasielewski, Michael R

2014-09-23T23:59:59.000Z

364

Energy collection efficiency of holographic planar solar concentrators  

Science Journals Connector (OSTI)

We analyze the energy collection properties of holographic planar concentrator systems. The effects of solar variation on daily and annual energy collection are evaluated. Hologram...

Castro, Jose M; Zhang, Deming; Myer, Brian; Kostuk, Raymond K

2010-01-01T23:59:59.000Z

365

Photovoltaic solar concentrator module  

SciTech Connect

This invention consists of a planar photovoltaic concentrator module for producing an electrical signal from incident solar radiation which includes an electrically insulating housing having a front wall, an opposing back wall and a hollow interior. A solar cell having electrical terminals is positioned within the interior of the housing. A planar conductor is connected with a terminal of the solar cell of the same polarity. A lens forming the front wall of the housing is operable to direct solar radiation incident to the lens into the interior of the housing. A refractive optical element in contact with the solar cell and facing the lens receives the solar radiation directed into the interior of the housing by the lens and directs the solar radiation to the solar cell to cause the solar cell to generate an electrical signal. An electrically conductive planar member is positioned in the housing to rest on the housing back wall in supporting relation with the solar cell terminal of opposite polarity. The planar member is operable to dissipate heat radiated by the solar cell as the solar cell generates an electrical signal and further forms a solar cell conductor connected with the solar cell terminal to permit the electrical signal generated by the solar cell to be measured between the planar member and the conductor.

Chiang, C.J.

1991-05-16T23:59:59.000Z

366

[New technology for linear colliders  

SciTech Connect

This report discusses the following topics on research of microwave amplifiers for linear colliders: Context in current microwave technology development; gated field emission for microwave cathodes; cathode fabrication and tests; microwave cathode design using field emitters; and microwave localization.

McIntyre, P.M.

1992-08-12T23:59:59.000Z

367

Linear actuator powered flapping wing  

E-Print Network (OSTI)

Small scale unmanned aerial vehicles (UAVs) have proven themselves to be useful, but often too noisy for certain operations due to their rotary motors. This project examined the feasibility of using an almost silent linear ...

Benson, Christopher Lee

2010-01-01T23:59:59.000Z

368

linear-elements-code.scm  

E-Print Network (OSTI)

(o Linear-finite-element-operator)) ;; initialize various fields that depend on the space ;; if coefficients is not defined, we set it to arrays of floating-point ;; zeros ...

369

Highly linear low noise amplifier  

E-Print Network (OSTI)

, the Low Noise Amplifier (LNA) is expected to provide high linearity, thus preventing the intermodulation tones created by the interference signal from corrupting the carrier signal. The research focuses on designing a novel LNA which achieves high...

Ganesan, Sivakumar

2007-09-17T23:59:59.000Z

370

Linear Accelerator | Advanced Photon Source  

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

(MeV). At 450 MeV, the electrons are relativistic: they are traveling at >99.999% of the speed of light, which is 299,792,458 meters second (186,000 milessecond). Photo: Linear...

371

MHK Technologies/The Linear Generator | Open Energy Information  

Open Energy Info (EERE)

Linear Generator Linear Generator < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage The Linear Generator.jpg Technology Profile Primary Organization Trident Energy Ltd Project(s) where this technology is utilized *MHK Projects/TE4 Technology Resource Click here Wave Technology Type Click here Point Absorber Technology Readiness Level Click here TRL 1-3: Discovery / Concept Definition / Early Stage Development & Design & Engineering Technology Description The simplicity of the Trident Energy solution is based around the fact that the system has only one moving part - float / linear generator translator, which is powered by the motion of floats placed in the sea. As waves pass through the wavefarm, so the floats rise and fall. This causes relative motion between the two components of the linear generator (the translator and stator) and electricity is immediately generated. There is absolutely no contact between the two parts of the generator as the energy conversion is entirely electromagnetic.

372

ENGINEERING DEPARTMENTS, DEGREES AND CONCENTRATIONS  

E-Print Network (OSTI)

ENGINEERING, CHEMISTRY AND SCIENCE (TECS) Biological Engineering (BE) Biomedical Engineering (BME) ChemicalENGINEERING DEPARTMENTS, DEGREES AND CONCENTRATIONS DEPARTMENT DEGREE CONCENTRATION (optional) BIOLOGICAL AND AGRICULTURAL ENGINEERING (BAE) BIOMEDICAL ENGINEERING (BME) CHEMICAL AND BIOMOLECULAR

373

SEDIMENT CONCENTRATION BELOW FREE OVERFALL  

E-Print Network (OSTI)

SEDIMENT CONCENTRATION BELOW FREE OVERFALL By O. R. Stein,~Associate Member, ASCE, and P. Y. Julien and sediment concentration, which may affect downstream morphology and water quality as well as the structure is to determine relationships between time, scour depth, scour-hole volume, and sediment concentration generated

Julien, Pierre Y.

374

On the linearization theorem of Fenner and Pinto  

Science Journals Connector (OSTI)

This paper reports an improvement of the linearization theorem of Fenner and Pinto (1999) [22]. Fenner and Pinto presented a version of Hartman’s result. They showed that there exists a one-to-one correspondence between solutions of the linear system and the nonlinear system. Moreover, if H ( t , x ) denotes the transformation, then H ( t , x ) ? x is uniformly bounded. However, no proof of the Hölder regularity of the transformation H ( t , x ) appears in Fenner and Pinto (1999) [22]. The main objective in this paper is precisely to give a proof of the Hölder regularity of the transformation H ( t , x ) . Namely, we show that the conjugating function H ( t , x ) in the Hartman–Grobman theorem, is always Hölder continuous (and has Hölder continuous inverse). Moreover, we weakened an important assumption in Fenner and Pinto (1999) [22]. Fenner and Pinto obtained the linearization theorem by setting that the whole linear system should satisfy IS condition. In this paper, this assumption is reduced. In fact, it is enough to assume that the linear system partially satisfies IS condition. Therefore, we improve the linearization theorem of Fenner and Pinto.

Yong-Hui Xia; Xiaodan Chen; Valery G. Romanovski

2013-01-01T23:59:59.000Z

375

SunShot Initiative: Baseload Concentrating Solar Power Generation  

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

Concentrating Solar Concentrating Solar Power Generation to someone by E-mail Share SunShot Initiative: Baseload Concentrating Solar Power Generation on Facebook Tweet about SunShot Initiative: Baseload Concentrating Solar Power Generation on Twitter Bookmark SunShot Initiative: Baseload Concentrating Solar Power Generation on Google Bookmark SunShot Initiative: Baseload Concentrating Solar Power Generation on Delicious Rank SunShot Initiative: Baseload Concentrating Solar Power Generation on Digg Find More places to share SunShot Initiative: Baseload Concentrating Solar Power Generation on AddThis.com... Concentrating Solar Power Systems Components Competitive Awards CSP Research & Development Thermal Storage CSP Recovery Act Baseload CSP SunShot Multidisciplinary University Research Initiative

376

SunShot Initiative: Concentrating Solar Power Competitive Awards  

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

Concentrating Solar Power Concentrating Solar Power Competitive Awards to someone by E-mail Share SunShot Initiative: Concentrating Solar Power Competitive Awards on Facebook Tweet about SunShot Initiative: Concentrating Solar Power Competitive Awards on Twitter Bookmark SunShot Initiative: Concentrating Solar Power Competitive Awards on Google Bookmark SunShot Initiative: Concentrating Solar Power Competitive Awards on Delicious Rank SunShot Initiative: Concentrating Solar Power Competitive Awards on Digg Find More places to share SunShot Initiative: Concentrating Solar Power Competitive Awards on AddThis.com... Concentrating Solar Power Systems Components Competitive Awards CSP Research & Development Thermal Storage CSP Recovery Act Baseload CSP SunShot Multidisciplinary University Research Initiative

377

SunShot Initiative: Concentrated Solar Thermoelectric Power  

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

Concentrated Solar Thermoelectric Concentrated Solar Thermoelectric Power to someone by E-mail Share SunShot Initiative: Concentrated Solar Thermoelectric Power on Facebook Tweet about SunShot Initiative: Concentrated Solar Thermoelectric Power on Twitter Bookmark SunShot Initiative: Concentrated Solar Thermoelectric Power on Google Bookmark SunShot Initiative: Concentrated Solar Thermoelectric Power on Delicious Rank SunShot Initiative: Concentrated Solar Thermoelectric Power on Digg Find More places to share SunShot Initiative: Concentrated Solar Thermoelectric Power on AddThis.com... Concentrating Solar Power Systems Components Competitive Awards CSP Research & Development Thermal Storage CSP Recovery Act Baseload CSP SunShot Multidisciplinary University Research Initiative CSP Heat Integration for Baseload Renewable Energy Deployment

378

Nonimaging light concentrator with uniform irradiance  

DOE Patents (OSTI)

A nonimaging light concentrator system including a primary collector of light, an optical mixer disposed near the focal zone for collecting light from the primary collector, the optical mixer having a transparent entrance aperture, an internally reflective housing for substantially total internal reflection of light, a transparent exit aperture and an array of photovoltaic cells disposed near the transparent exit aperture.

Winston, Roland (Chicago, IL); Gee, Randy C. (Arvada, CO)

2003-04-01T23:59:59.000Z

379

The Rheology of Concentrated Suspensions  

SciTech Connect

Research program on the rheological properties of flowing suspensions. The primary purpose of the research supported by this grant was to study the flow characteristics of concentrated suspensions of non-colloidal solid particles and thereby construct a comprehensive and robust theoretical framework for modeling such systems quantitatively. At first glance, this seemed like a modest goal, not difficult to achieve, given that such suspensions were viewed simply as Newtonian fluids with an effective viscosity equal to the product of the viscosity of the suspending fluid times a function of the particle volume fraction. But thanks to the research findings of the Principal Investigator and of his Associates, made possible by the steady and continuous support which the PI received from the DOE Office of Basic Energy Sciences, the subject is now seen to be more complicated and therefore much more interesting in that concentrated suspensions have been shown to exhibit fascinating and unique rheological properties of their own that have no counterpart in flowing Newtonian or even non-Newtonian (polymeric) fluids. In fact, it is generally acknowledged that, as the result of these investigations for which the PI received the 2001 National Medal of Science, our understanding of how suspensions behave under flow is far more detailed and comprehensive than was the case even as recently as a decade ago. Thus, given that the flow of suspensions plays a crucial role in many diverse physical processes, our work has had a major and lasting impact in a subject having both fundamental as well as practical importance.

Andreas Acrivos

2004-09-07T23:59:59.000Z

380

MHK Technologies/Ocean Current Linear Turbine | Open Energy Information  

Open Energy Info (EERE)

Linear Turbine Linear Turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Ocean Current Linear Turbine.jpg Technology Profile Primary Organization Ocean Energy Company LLC Technology Type Click here Seabed mooring system Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description Endless cable loop with parachutes spliced to cable which moored in an ocean current pulls the cable through rotors which in turn power conventional electricity generators See US Patent 3 887 817 Additional patent pending Technology Dimensions Device Testing Date Submitted 30:08.6 << Return to the MHK database homepage Retrieved from "http://en.openei.org/w/index.php?title=MHK_Technologies/Ocean_Current_Linear_Turbine&oldid=681618"

Note: This page contains sample records for the topic "linear concentrator 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

Homogeneous Charge Compression Ignition Free Piston Linear Alternator  

SciTech Connect

An experimental and theoretical investigation of a homogeneous charge compression ignition (HCCI) free piston powered linear alternator has been conducted to determine if improvements can be made in the thermal and conversion efficiencies of modern electrical generator systems. Performance of a free piston engine was investigated using a rapid compression expansion machine and a full cycle thermodynamic model. Linear alternator performance was investigated with a computer model. In addition linear alternator testing and permanent magnet characterization hardware were developed. The development of the two-stroke cycle scavenging process has begun.

Janson Wu; Nicholas Paradiso; Peter Van Blarigan; Scott Goldsborough

1998-11-01T23:59:59.000Z

382

Linear Collider Collaboration Tech Notes  

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

6, 27/05/99 6, 27/05/99 Tolerances of Random RF Jitters in X-Band Main Linacs May 27, 1999 Kiyoshi KUBO KEK Tsukuba, Japan Abstract: Tracking simulations have been performed for the main linacs of an X-band linear collider. We discuss the choice of phase of the accelerating field relative to the bunches. The tolerances of the phase and the amplitude errors are studied. Tolerances of Random RF Jitters in X-Band Main Linacs K. Kubo, KEK Abstract Tracking simulations have been performed for main linacs of X-band linear collider. We discuss about choice of the phase of the accelerating field relative to the bunches. The tolerances of the phase and the amplitude errors are studied. 1 INTRODUCTION In order to preserve the low emittance through the main linacs of future linear colliders, various effects

383

Etendue-matched two-stage concentrators with multiple receivers  

SciTech Connect

A possible way to concentrate sun light is by using a Fresnel reflector: a large number of small mirrors (called heliostats) that mimic the behavior of a large concentrator, replacing it. These heliostats can move to track the sun, keeping its light concentrated onto the receiver. Fresnel concentrators, however, may have important losses. If the heliostats are spaced from each other, some light will miss them and be lost. If the heliostats are close to each other, they will block part of each other's reflected light, also producing losses. One possible way to minimize these losses is to intersect two focusing Fresnel concentrators forming a Compact Linear Fresnel Reflector - CLFR. Although improving on a simple focusing Fresnel concentrator, these optics are still not optimal. Here new geometries for Fresnel reflectors are explored, minimizing their losses and increasing their concentration. This is achieved by changing the overall shape of the primary, making it a wave-shaped trough surface and/or by allowing for a variable size and shape of the heliostats as a function of the position in the heliostat field. These new Fresnel concentrators may also be combined with secondaries significantly improving their total concentration, which now approaches the theoretical maximum. (author)

Chaves, Julio [Light Prescriptions Innovators, Edif. CeDInt, Campus Montegancedo UPM, 28223 Pozuelo de Alarcon, Madrid (Spain); Collares-Pereira, Manuel [Physics Department, IST, Technical University of Lisbon (Portugal)

2010-02-15T23:59:59.000Z

384

Independent Oversight Inspection, Stanford Linear Accelerator...  

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

Stanford Linear Accelerator Center - January 2007 January 2007 Inspection of Environment, Safety, and Health Programs at the Stanford Linear Accelerator Center This report...

385

Extended Linear Response for Bioanalytical Applications Using Multiple Enzymes  

E-Print Network (OSTI)

We develop a framework for optimizing a novel approach to extending the linear range of bioanalytical systems and biosensors by utilizing two enzymes with different kinetic responses to the input chemical as their substrate. Data for the flow-injection amperometric system devised for detection of lysine based on the function of L-Lysine-alpha-Oxidase and Lysine-2-monooxygenase are analyzed. Lysine is a homotropic substrate for the latter enzyme. We elucidate the mechanism for extending the linear response range and develop optimization techniques for future applications of such systems.

Privman, Vladimir; Simonian, Aleksandr

2013-01-01T23:59:59.000Z

386

Extended Linear Response for Bioanalytical Applications Using Multiple Enzymes  

E-Print Network (OSTI)

We develop a framework for optimizing a novel approach to extending the linear range of bioanalytical systems and biosensors by utilizing two enzymes with different kinetic responses to the input chemical as their substrate. Data for the flow-injection amperometric system devised for detection of lysine based on the function of L-Lysine-alpha-Oxidase and Lysine-2-monooxygenase are analyzed. Lysine is a homotropic substrate for the latter enzyme. We elucidate the mechanism for extending the linear response range and develop optimization techniques for future applications of such systems.

Vladimir Privman; Oleksandr Zavalov; Aleksandr Simonian

2013-05-25T23:59:59.000Z

387

Application of linear programming redispatch technique to dynamic generation allocation  

SciTech Connect

This paper considers dispatch problems that involve the allocation of system generation optimally among generating units while tracking a load curve and observing power rate limits of the units, system spinning reserve requirements and other security constraints. Two methods are used in the solution of the problem. The first method is quadratic programming technique combined with a linear programming redispatch technique. The latter utilizes a linear programming formulation of the dynamic dispatch problem about the base case static economic dispatch solution. Tests and computer results on 4 systems of different combinations of units and intervals are given to show the advantages of the techniques proposed.

Somuah, C.B. (Dept. of Electrical Engr., KFUPM, Dhahran 31261 (SA)); Khunaizi, N. (Saudi Consolidated Electric Co., In the Eastern Province, Dammam (SA))

1990-02-01T23:59:59.000Z

388

A Path to High-Concentration Luminescent Solar Concentrators  

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

and Impact LSCs enable non-tracking concentration of both direct sunlight and diffuse light onto high- efficiency solar cells, and our work predicts unprecendented levels of...

389

E-Print Network 3.0 - applying non-linear dynamics Sample Search...  

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

Applications, University College London Collection: Physics 2 Journal of Sound and Vibration (1995) 182(2), 336341 NON-LINEAR MODAL ANALYSIS OF STRUCTURAL SYSTEMS FEATURING...

390

Cylindrical Acoustic Levitator/Concentrator  

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

Cylindrical Acoustic Levitator/Concentrator Cylindrical Acoustic Levitator/Concentrator Cylindrical Acoustic Levitator/Concentrator A low-power, inexpensive acoustic apparatus for levitation and/or concentration of aerosols and small liquid/solid samples having particulates up to several millimeters in diameter in air or other fluids is described. Available for thumbnail of Feynman Center (505) 665-9090 Email Cylindrical Acoustic Levitator/Concentrator A low-power, inexpensive acoustic apparatus for levitation and/or concentration of aerosols and small liquid/solid samples having particulates up to several millimeters in diameter in air or other fluids is described. It is constructed from a commercially available, hollow cylindrical piezoelectric crystal which has been modified to tune the resonance frequency of the breathing mode resonance of the crystal to that

391

Transformations for densities Linear transformations  

E-Print Network (OSTI)

' & $ % Lecture 28 Transformations for densities Linear transformations 1-1 differentiable functions General transformations Expectation of a function 1 #12;' & $ % Transformations for discrete transformation of a U[0, 1] · Take X U[0, 1], so that fX(x) = 1 0 0 and set Y

Adler, Robert J.

392

PARKS, RECREATION & TOURISM Concentration in  

E-Print Network (OSTI)

PARKS, RECREATION & TOURISM Concentration in Conservation Law Enforcement School Experience in Parks, Recreation, and Tourism 1 Semester 5 Semester 6 SFR 434/534 - Recreation Site Planning

Thomas, Andrew

393

SunShot Initiative: Scattering Solar Thermal Concentrators  

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

Scattering Solar Thermal Scattering Solar Thermal Concentrators to someone by E-mail Share SunShot Initiative: Scattering Solar Thermal Concentrators on Facebook Tweet about SunShot Initiative: Scattering Solar Thermal Concentrators on Twitter Bookmark SunShot Initiative: Scattering Solar Thermal Concentrators on Google Bookmark SunShot Initiative: Scattering Solar Thermal Concentrators on Delicious Rank SunShot Initiative: Scattering Solar Thermal Concentrators on Digg Find More places to share SunShot Initiative: Scattering Solar Thermal Concentrators on AddThis.com... Concentrating Solar Power Systems Components Competitive Awards CSP Research & Development Thermal Storage CSP Recovery Act Baseload CSP SunShot Multidisciplinary University Research Initiative CSP Heat Integration for Baseload Renewable Energy Deployment

394

Low-Cost, Lightweight Solar Concentrators  

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

Concentrators Concentrators California Institute of Technology/Jet Propulsion Laboratory Award Number:0595-1612 | April 18, 2013 | Ganapathi * Mirror module development has been approached with the goal of being applicable to all types of CSP systems * Several heliostat design options being considered to address driving requirements: * Facets that are compliant to winds > 35 mph * Deep structures for optimizing structural efficiency * Pointing accuracy achieved with mechanism design * Simple precision components * Easy on-site assembly with pre-fab components * Structural foam properties and strengthening trades being conducted to reduce overall costs with FEM models Goal: Typical costs for a concentrator (heliostat or parabolic dish) can range between 40-50% of the total costs. To meet SunShot

395

Multi-stage linear slot virtual impactor for concentration of bioaerosols  

E-Print Network (OSTI)

in parallel for the first stage with the designed dimensions of 87 mm (3.4Â?) for the throat length, 0.305 mm (.012Â?) for the accelerator throat width, and 0.457 mm (.018Â?) for the receiver throat width. The second stage contained a single unit...

Conerly, Shawn Charles

2006-08-16T23:59:59.000Z

396

Preparation and coking properties of coal maceral concentrates  

Science Journals Connector (OSTI)

Abstract The concentrates with different maceral contents were obtained from Kailuan coking coals with different coal ranks ( R o,ran ? varying from 0.88% to 1.73%) by float–sink separation in lab. Then these concentrates were characterized by proximate analysis, ultimate analysis, petrography analysis and coking index determination. The results show that the vitrinite is characterized as nature of lower carbon content, higher hydrogen content, higher volatile matter and stronger caking property compared to inertinite. The relationships between variation rate of volatile matter and maximum volatile matter and coal ranks are identified, and a linear model is developed for fast determination of the maceral contents. Compared to inertinite-rich concentrate, the blending ratio of vitrinite-rich concentrate is increased by 13%, which is considered to be a potential technique based on maceral separation for expanding the coking coal resources.

Lei Zhang; Wenli Liu; Dongpo Men

2014-01-01T23:59:59.000Z

397

Optimized groundwater containment using linear programming  

SciTech Connect

Groundwater extraction systems are typically installed to contain contaminant plumes. These systems are expensive to install and maintain. A traditional approach to designing such a wellfield is to use a series of trial-and-error simulations to test the effects of various well locations and pump rates. However, optimal locations and pump rates of extraction wells are difficult to determine when the objectives of the potential pumping scheme and the site hydrogeology are considered. This paper describes a case study of an application of linear programming theory to determine optimal well placement and pump rates. Calculations were conducted by using ModMan to link a calibrated MODFLOW flow model with LINDO, a linear programming package. Past activities at the site under study included disposal of contaminants in pits. Several groundwater plumes have been identified, and others may be present. The area of concern is bordered on three sides by a wetland, which receives a portion of its input water budget as groundwater discharge from the disposal area. The objective function of the optimization was to minimize the rate of groundwater extraction while preventing discharge to the marsh across a user-specified boundary. In this manner, the optimization routine selects well locations and pump rates to produce a groundwater divide along this boundary.

Quinn, J.J.; Johnson, R.L.; Durham, L.A.

1998-07-01T23:59:59.000Z

398

Declaration of Concentration in Nanotechnology  

E-Print Network (OSTI)

Declaration of Concentration in Nanotechnology Return completed form to ENG Undergraduate Records:____________________________ Instructions: ENG students declaring a Concentration in Nanotechnology should complete this form, obtain REQUIRED COURSES (Choose 1) 1. ENG EC 481­ Fundamentals of Nanomaterials and Nanotechnology 4.0 ELECTIVES

Goldberg, Bennett

399

Project Approval Form Concentration in  

E-Print Network (OSTI)

Project Approval Form Concentration in Nanotechnology Return completed form to ENG Undergraduate Plan to complete the project as a requirement for the concentration in Nanotechnology. Depending upon project, you will need to submit a written summary of your work, signed (approved) by your project

Goldberg, Bennett

400

Peptide concentration alters intermediate species in amyloid ? fibrillation kinetics  

SciTech Connect

Highlights: ? A?(1–40) aggregation in vitro has been monitored at different concentrations. ? A?(1–40) fibrillation does not always follow conventional kinetic mechanisms. ? We demonstrate non-linear features in the kinetics of A?(1–40) fibril formation. ? At high A?(1–40) concentrations secondary processes dictate fibrillation speed. ? Intermediate species may play significant roles on final amyloid fibril development. -- Abstract: The kinetic mechanism of amyloid aggregation remains to be fully understood. Investigations into the species present in the different kinetic phases can assist our comprehension of amyloid diseases and further our understanding of the mechanism behind amyloid ? (A?) (1–40) peptide aggregation. Thioflavin T (ThT) fluorescence and transmission electron microscopy (TEM) have been used in combination to monitor A?(1–40) aggregation in vitro at both normal and higher than standard concentrations. The observed fibrillation behaviour deviates, in several respects, from standard concepts of the nucleation–polymerisation models and shows such features as concentration-dependent non-linear effects in the assembly mechanism. A?(1–40) fibrillation kinetics do not always follow conventional kinetic mechanisms and, specifically at high concentrations, intermediate structures become populated and secondary processes may further modify the fibrillation mechanism.

Garvey, M., E-mail: megan.garvey@molbiotech.rwth-aachen.de [Max-Planck Research Unit for Enzymology of Protein Folding, Weinbergweg 22, 06120 Halle (Saale) (Germany); Morgado, I., E-mail: immorgado@ualg.pt [Max-Planck Research Unit for Enzymology of Protein Folding, Weinbergweg 22, 06120 Halle (Saale) (Germany)

2013-04-12T23:59:59.000Z

Note: This page contains sample records for the topic "linear concentrator 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.
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to obtain the most current and comprehensive results.


401

Linear Collider Collaboration Tech Notes LCC-70  

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

70 70 August 2001 Design Studies of Positron Collection for the NLC Yuri K. Batygin, Ninod K. Bharadwaj, David C. Schultz ,John C. Sheppard Stanford Linear Accelerator Center Stanford, CA Abstract: The positron source for the NLC project utilizes a 6.2 GeV electron beam interacting in a high-Z positron production target. The electromagnetic shower in the target results in large energy deposition which can cause damage to the target. Optimization of the collection system is required to insure long-term operation of the target with needed high positron yield into the 6-dimensional acceptance of the subsequent pre-damping ring. Positron tracking through the accelerating system indicates a dilution of the initial positron phase space density. Results of simulations indicate that a

402

Linear Collider Collaboration Tech Notes LCC-0101  

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

1 1 August 2002 Collimator Wakefield Calculations for ILC-TRC Report Peter Tenenbaum Stanford Linear Accelerator Center Stanford University Stanford, CA 94309, USA Abstract: We summarize the formalism of collimator wakefields and their effect on beams that are near the center of the collimator gap, and apply the formalism to the TESLA, NLC, and CLIC collimation systems. Collimator Wakefield Calculations for ILC-TRC Report P. Tenenbaum LCC-Note-0101 20-Aug-2002 Abstract We summarize the formalism of collimator wakefields and their effect on beams which are near the center of the collimator gap, and apply the formalism to the TESLA, NLC, and CLIC collimation systems. 1 Introduction One of the beam dynamics effects which must be evaluated for the

403

SunShot Initiative: Concentrating Solar Power  

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

Power Power SunShot CSP Team Learn more about the SunShot concentrating solar power program staff by visiting the team's profile pages. Argonne National Laboratory Argonne National Laboratory High-Efficiency Thermal Energy Storage System for CSP University of California Los Angeles University of California Los Angeles High Operating Temperature Liquid Metal Heat Transfer Fluids Jet Propulsion Laborator Jet Propulsion Laboratory Low-Cost, Lightweight Solar Concentrators Abengoa Solar Abengoa Solar Advanced Nitrate Salt Central Receiver Power Plant HiTek Services HiTek Services Low-Cost Heliostat Development The Department of Energy (DOE) supports research and development of concentrating solar power (CSP) technologies as a unique path to achieve SunShot Initiative cost targets with systems that can supply solar power on demand through the use of thermal storage. CSP technologies use mirrors to reflect and concentrate sunlight onto receivers that collect solar energy and convert it to heat. Thermal energy can then be used to produce electricity via a turbine or heat engine driving a generator.

404

Linear Collider Collaboration Tech Notes  

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

Notes Notes LCC - 0018, 15/06/99 Rev B, June 2002 Correct Account of RF Deflections in Linac Acceleration June 15, 1999 G.V. Stupakov Stanford Linear Accelerator Center Stanford, California Abstract: During acceleration in the linac structure, the beam not only increases its longitudinal momentum, but also experiences a transverse kick from the accelerating mode which is linear in accelerating gradient. This effect is neglected in such computer codes as LIAR and TRANSPORT. We derived the Hamiltonian equations that describe the effect of RF deflection into the acceleration process and included it into the computational engine of LIAR. By comparing orbits for the NLC main linac, we found that the difference between the two algorithms is about 10\%. The effect will be more pronounced at smaller

405

Magnetic levitation configuration incorporating levitation, guidance and linear synchronous motor  

DOE Patents (OSTI)

A propulsion and suspension system for an inductive repulsion type magnetically levitated vehicle which is propelled and suspended by a system which includes propulsion windings which form a linear synchronous motor and conductive guideways, adjacent to the propulsion windings, where both combine to partially encircling the vehicle-borne superconducting magnets. A three phase power source is used with the linear synchronous motor to produce a traveling magnetic wave which in conjunction with the magnets propel the vehicle. The conductive guideway combines with the superconducting magnets to provide for vehicle levitation. 3 figures.

Coffey, H.T.

1993-10-19T23:59:59.000Z

406

Precision linear ramp function generator  

DOE Patents (OSTI)

A ramp function generator is provided which produces a precise linear ramp function which is repeatable and highly stable. A derivative feedback loop is used to stabilize the output of an integrator in the forward loop and control the ramp rate. The ramp may be started from a selected baseline voltage level and the desired ramp rate is selected by applying an appropriate constant voltage to the input of the integrator.

Jatko, W.B.; McNeilly, D.R.; Thacker, L.H.

1984-08-01T23:59:59.000Z

407

Cast dielectric composite linear accelerator  

DOE Patents (OSTI)

A linear accelerator having cast dielectric composite layers integrally formed with conductor electrodes in a solventless fabrication process, with the cast dielectric composite preferably having a nanoparticle filler in an organic polymer such as a thermosetting resin. By incorporating this cast dielectric composite the dielectric constant of critical insulating layers of the transmission lines of the accelerator are increased while simultaneously maintaining high dielectric strengths for the accelerator.

Sanders, David M. (Livermore, CA); Sampayan, Stephen (Manteca, CA); Slenes, Kirk (Albuquerque, NM); Stoller, H. M. (Albuquerque, NM)

2009-11-10T23:59:59.000Z

408

Segmented rail linear induction motor  

DOE Patents (OSTI)

A segmented rail linear induction motor has a segmented rail consisting of a plurality of nonferrous electrically conductive segments aligned along a guideway. The motor further includes a carriage including at least one pair of opposed coils fastened to the carriage for moving the carriage. A power source applies an electric current to the coils to induce currents in the conductive surfaces to repel the coils from adjacent edges of the conductive surfaces.

Cowan, Jr., Maynard (1107 Stagecoach Rd. SE., Albuquerque, NM 87123); Marder, Barry M. (1412 Pinnacle View Dr. NE., Albuquerque, NM 87123)

1996-01-01T23:59:59.000Z

409

Segmented rail linear induction motor  

DOE Patents (OSTI)

A segmented rail linear induction motor has a segmented rail consisting of a plurality of nonferrous electrically conductive segments aligned along a guideway. The motor further includes a carriage including at least one pair of opposed coils fastened to the carriage for moving the carriage. A power source applies an electric current to the coils to induce currents in the conductive surfaces to repel the coils from adjacent edges of the conductive surfaces. 6 figs.

Cowan, M. Jr.; Marder, B.M.

1996-09-03T23:59:59.000Z

410

CONCENTRATES  

Science Journals Connector (OSTI)

Tertiary oil recovery shows promise with a new nonthermal process developed by Marathon Oil Co., Findlay, Ohio. ... Marathon says tests in its old southeastern Illinois oil field (only 60 to 65% depleted) show that the scheme can recover a high proportion of the remaining petroleum. ... The company ran two oil-well test patterns, injecting emulsion in the center well and drawing up fluid in surrounding wells. ...

1966-09-19T23:59:59.000Z

411

CONCENTRATES  

Science Journals Connector (OSTI)

A possible new gamma ray source in the constellation Scorpius will be sought by Dr. Robert C. Haymes, Rice University, using a gamma ray telescope mounted on a balloon launched in Argentina. ... Radiation analysis should tell whether the rays come from an exploding star, high energy particles, or anti-matter. ...

1969-10-20T23:59:59.000Z

412

CONCENTRATES  

Science Journals Connector (OSTI)

Cadarache, France, was selected last week to be the site for the International Thermonuclear Experimental Reactor (ITER) project. ... ITER's goal is to demonstrate a self-sustaining fusion reaction in a power-plant-like environment that could lead to commercial nuclear fusion power plants by the turn of the century, said Raymond L. Orbach, head of the Department of Energy's Office of Science. ...

2005-07-04T23:59:59.000Z

413

CONCENTRATES  

Science Journals Connector (OSTI)

EVONIK PULLS BACK IPO, INVESTS IN R&DEvonik Industries has once again shelved an initial public offering (IPO) of stock. In April, RAG Foundation, which owns about 75% of the firm, said that it was considering an IPO within the next 15 months and that ...

2011-10-03T23:59:59.000Z

414

CONCENTRATES  

Science Journals Connector (OSTI)

SHIN-ETSU MAKES FIRST MAJOR CHINA INVESTMENT ... Although China is a major market for Shin-Etsu, Japan’s most profitable chemical maker, the company has until now refrained from making large investments there because it perceived the political risk to be too great. ... Citing rising global demand from tire makers, Lanxess says it will invest about $25 million to raise butyl and halobutyl rubber capacity at its site in Zwijndrecht, Belgium. ...

2010-07-05T23:59:59.000Z

415

CONCENTRATES  

Science Journals Connector (OSTI)

The student-designed homes were required to provide enough electricity to meet all home energy needs as well as enough to charge up an electric car. ...

2002-10-14T23:59:59.000Z

416

CONCENTRATES  

Science Journals Connector (OSTI)

The Department of Energy last week denied $2 billion in loan guarantees sought by the global energy company USEC to continue construction of its partially complete centrifuge-based uranium enrichment facility in Piketon, Ohio, which would create low-enrichment uranium (LEU) fuel for nuclear power plants. ... DOE did, however, offer USEC some $45 million in grants for further research. ... Currently, USEC produces about half the nation’s LEU reactor fuel primarily by down-blending Russian bomb-grade uranium, along with using an older, noncentrifuge-based enrichment technology. ...

2009-08-03T23:59:59.000Z

417

CONCENTRATES  

Science Journals Connector (OSTI)

CSB SLAMS XCEL ENERGY FOR DEADLY ACCIDENT ... A flash fire that killed five workers in a deep underground tunnel nearly three years ago was caused by safety failures of Xcel Energy and contractor RPI Coating, says a report by the Chemical Safety & Hazard Investigation Board (CSB), released on Aug. 25. ... CSB’s report blamed Xcel and RPI for failing to train workers and to take adequate precautions when handling MEK. ...

2010-08-30T23:59:59.000Z

418

CONCENTRATES  

Science Journals Connector (OSTI)

GAO faults NRC for oversight of nuclear plant security plansThe Nuclear Regulatory Commission (NRC) is relying too heavily on nuclear power plant owners to verify the adequacy of their terrorism security plans, says a recent report by the Government ...

2004-09-20T23:59:59.000Z

419

CONCENTRATES  

Science Journals Connector (OSTI)

Worldwide, chemical industry products reduced emissions of greenhouse gases far more than the emissions generated in making these products, according to a study by McKinsey & Co. ... Next came compact fluorescent lighting, fertilizers, and lightweight composite materials. ...

2009-07-13T23:59:59.000Z

420

CONCENTRATES  

Science Journals Connector (OSTI)

A team led by Amy E. Landis of the University of Pittsburgh evaluated a dozen polymers: seven derived from petroleum, four from biomass feedstocks, and one in part from both sources. ...

2010-10-04T23:59:59.000Z

Note: This page contains sample records for the topic "linear concentrator 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

CONCENTRATES  

Science Journals Connector (OSTI)

DOE announces cleanups, fines, new safety plans ... DOE also announced $124,000 in fines against contractors operating at the Hanford Site in Washington, the Rocky Flats Site in Colorado, and the Idaho National Engineering & Environmental Laboratory for endangering workers through exposure to radioactive contamination.? ...

2000-06-05T23:59:59.000Z

422

CONCENTRATES  

Science Journals Connector (OSTI)

COURT BACKS LILLY IN PATENT CASEA federal appeals court has ruled in favor of Eli Lilly & Co. in a patent dispute with Ariad Pharmaceuticals. The U.S. Court of Appeals for the Federal Circuit found that Lilly did not violate a patent held by Ariad ...

2010-03-29T23:59:59.000Z

423

CONCENTRATES  

Science Journals Connector (OSTI)

TECHNOLOGY ... A thermocouple developed by North American Rockwell for the Apollo lunar landing program will be manufactured and marketed by William Wahl Corp., Santa Monica, Calif. ... Potential uses include making refractory metals and development of gas turbine engines, a company spokesman says. ...

1969-10-13T23:59:59.000Z

424

CONCENTRATES  

Science Journals Connector (OSTI)

For instance, Los Alamos National Laboratory officials believe that using plutonium in NIF and achieving repeatable thermonuclear ignition is critical to NIF's value in weapons work, yet NIF has not been approved for plutonium use and its ability to achieve nuclear ignition is uncertain, the report says. ...

2001-06-11T23:59:59.000Z

425

NREL: Concentrating Solar Power Research - Projects  

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

Projects Projects NREL's concentrating solar power (CSP) projects focus on components R&D and systems analysis related to power tower and parabolic trough technologies. We support the U.S. Department of Energy (DOE) in its CSP deployment efforts in the following areas: Collectors Receivers Power block Thermal energy storage Analysis. NREL received funding from DOE for concentrating solar power research projects. Through a competitive process, NREL was selected to lead the following projects: Novel Components to Overcome Existing Barriers-Particle Receiver Integrated with a Fluidized Bed Thermodynamic Cycle to Revolutionize CSP Systems-10-Megawatt Supercritical Carbon Dioxide (s-CO2) Turbine Test Nanomaterials for thermal energy storage in CSP plants In addition to these efforts, NREL is also a key partner on two other

426

NREL: Concentrating Solar Power Research - Laboratory Capabilities  

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

Laboratory Capabilities Laboratory Capabilities To research, develop, and test a variety of concentrating solar power technologies, NREL features the following laboratory capabilities: High-Flux Solar Furnace (HFSF) Large Payload Solar Tracker Advanced Optical Materials Laboratory Advanced Thermal Storage Materials Laboratory Optical Testing Laboratory and Beam Characterization System Receiver Test Laboratory Heat Collection Element (HCE) Temperature Survey Photo of NREL's High-Flux Solar Furnace. NREL's High-Flux Solar Furnace. High-Flux Solar Furnace (HFSF) The power generated at NREL's High-Flux Solar Furnace (HFSF) can be used to expose, test, and evaluate many components-such as receivers, collectors, and reflector materials-used in concentrating solar power systems. The 10-kilowatt HFSF consists of a tracking heliostat and 25 hexagonal

427

Concentrated solar energy applications using Fresnel lenses: A review  

Science Journals Connector (OSTI)

Solar energy concentration technology using Fresnel lens is an effective way to make full use of sunlight. This paper makes a review about the recent development of the concentrated solar energy applications using Fresnel lenses. The ongoing research and development involves imaging systems and non-imaging systems. Compared with imaging systems, non-imaging systems have the merits of larger accept angles, higher concentration ratios with less volume and shorter focal length, higher optical efficiency, etc. Concentrated photovoltaics is a major application and the highest solar-to-electric conversion efficiency based on imaging Fresnel lens and non-imaging Fresnel lens are reported as over 30% and 31.5 ± 1.7%, respectively. Moreover, both kinds of systems are widely used in other fields such as hydrogen generation, photo-bio reactors as well as photochemical reactions, surface modification of metallic materials, solar lighting and solar-pumped laser. During the recent two decades, such applications have been built and tested successfully to validate the practicality of Fresnel lens solar concentration systems. Although the present application scale is small, the ongoing research and development works suggest that Fresnel lens solar concentrators, especially non-imaging Fresnel lenses, will bring a breakthrough of commercial solar energy concentration application technology in the near future. Finally, the advantages and disadvantages of two systems are also summarized.

W.T. Xie; Y.J. Dai; R.Z. Wang; K. Sumathy

2011-01-01T23:59:59.000Z

428

Exergetic analysis of solar concentrator aided natural gas fired combined cycle power plant  

Science Journals Connector (OSTI)

This article deals with comparative energy and exergetic analysis for evaluation of natural gas fired combined cycle power plant and solar concentrator aided (feed water heating and low pressure steam generation options) natural gas fired combined cycle power plant. Heat Transfer analysis of Linear Fresnel reflecting solar concentrator (LFRSC) is used to predict the effect of focal distance and width of reflector upon the reflecting surface area. Performance analysis of LFRSC with energetic and exergetic methods and the effect, of concentration ratio and inlet temperature of the fluid is carried out to determine, overall heat loss coefficient of the circular evacuated tube absorber at different receiver temperatures. An instantaneous increase in power generation capacity of about 10% is observed by substituting solar thermal energy for feed water heater and low pressure steam generation. It is observed that the utilization of solar energy for feed water heating and low pressure steam generation is more effective based on exergetic analysis rather than energetic analysis. Furthermore, for a solar aided feed water heating and low pressure steam generation, it is found that the land area requirement is 7 ha/MW for large scale solar thermal storage system to run the plant for 24 h.

V. Siva Reddy; S.C. Kaushik; S.K. Tyagi

2012-01-01T23:59:59.000Z

429

$60 Million to Fund Projects Advancing Concentrating Solar Power |  

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

$60 Million to Fund Projects Advancing Concentrating Solar Power $60 Million to Fund Projects Advancing Concentrating Solar Power $60 Million to Fund Projects Advancing Concentrating Solar Power November 8, 2011 - 10:34am Addthis A 101 video on concentrating solar panel systems. | Courtesy of the Energy Department Jesse Gary Solar Energy Technologies Program On Tuesday, October 25, the Energy Department's SunShot initiative announced a $60 million funding opportunity (FOA) to advance concentrating solar power in the United States. The SunShot program seeks to support research into technologies with potential to dramatically increase efficiency, lower costs, and deliver more reliable performance than existing commercial and near-commercial concentrating solar power (CSP) systems. The Department expects to fund 20 to 22 projects, and we encourage

430

$60 Million to Fund Projects Advancing Concentrating Solar Power |  

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

$60 Million to Fund Projects Advancing Concentrating Solar Power $60 Million to Fund Projects Advancing Concentrating Solar Power $60 Million to Fund Projects Advancing Concentrating Solar Power November 8, 2011 - 10:34am Addthis A 101 video on concentrating solar panel systems. | Courtesy of the Energy Department Jesse Gary Solar Energy Technologies Program On Tuesday, October 25, the Energy Department's SunShot initiative announced a $60 million funding opportunity (FOA) to advance concentrating solar power in the United States. The SunShot program seeks to support research into technologies with potential to dramatically increase efficiency, lower costs, and deliver more reliable performance than existing commercial and near-commercial concentrating solar power (CSP) systems. The Department expects to fund 20 to 22 projects, and we encourage

431

Well-posedness of boundary-value problems for the linear Benjamin-Bona-Mahony equation  

E-Print Network (OSTI)

and Pelloni discuss boundary-value problems for Boussinesq type systems [7]. However, those mixed to boundary-value problems for linear evolution equations with variable coefficients [5, 13], systems PDEs [11]. In this paper, we apply the MoF to the linear Benjamin-Bona-Mahony (BBM) equa- tion [1]: ut

Deconinck, Bernard

432

Concentrating Solar Power Resources and Technologies | Department of Energy  

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

Concentrating Solar Power Resources and Technologies Concentrating Solar Power Resources and Technologies Concentrating Solar Power Resources and Technologies October 7, 2013 - 11:47am Addthis Photo of a CSP dish glistening in the sun. Multiple solar mirrors reflect sunlight onto a collector. CSP systems concentrate solar heat onto a collector, which powers a turbine to generate electricity. This page provides a brief overview of concentrating solar power (CSP) technologies supplemented by specific information to apply CSP within the Federal sector. Overview Concentrating solar power technologies produce electricity by concentrating the sun's energy using reflective devices, such as troughs or mirror panels, to reflect sunlight onto a receiver. The resulting high-temperature heat is used to power a conventional turbine to produce electricity.

433

Concentration oscillations and efficiency: glycolysis  

Science Journals Connector (OSTI)

...partitioning of the total free energy decrease, we postulate...Concentration Oscillations and Efficiency: Glycolysis Abstract...the point of view of efficiency offree energy conversion. It is suggested...the adenosine phosphate pool: the PFK reaction at...

PH Richter; J Ross

1981-02-13T23:59:59.000Z

434

Concentrated Thermoelectric Power | Department of Energy  

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

Concentrated Thermoelectric Power This fact sheet describes a concentrated solar hydroelectric power project awarded under the DOE's 2012 SunShot Concentrating Solar Power R&D...

435

Collectors R&D for CSP Systems  

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

Collectors—whether for trough, tower (heliostat), linear Fresnel or dish systems—comprise up to 40% of the total system costs for concentrating solar power (CSP) technologies. The DOE SunShot CSP Program seeks to dramatically reduce the cost of the collector field while improving optical accuracy and ensuring durability. The SunShot Initiative funds research and development (R&D) on collector systems and related aspects within the industry, national laboratories and universities to achieve the following technical targets of collector subsystems toward the SunShot goals.

436

Generalized universal instability: Transient linear amplification and subcritical turbulence  

E-Print Network (OSTI)

In this work we numerically demonstrate both significant transient (i.e. non-modal) linear amplification and sustained nonlinear turbulence in a kinetic plasma system with no unstable eigenmodes. The particular system considered is an electrostatic plasma slab with magnetic shear, kinetic electrons and ions, weak collisions, and a density gradient, but with no temperature gradient. In contrast to hydrodynamic examples of non-modal growth and subcritical turbulence, here there is no sheared flow in the equilibrium. Significant transient linear amplification is found when the magnetic shear and collisionality are weak. It is also demonstrated that nonlinear turbulence can be sustained if initialized at sufficient amplitude. We prove these two phenomena are related: when sustained turbulence occurs without unstable eigenmodes, states that are typical of the turbulence must yield transient linear amplification of the gyrokinetic free energy.

Landreman, Matt; Dorland, William

2015-01-01T23:59:59.000Z

437

Assessment of MagNA Pure LC Extraction System for Detection of Human Papillomavirus (HPV) DNA in PreservCyt Samples by the Roche AMPLICOR and LINEAR ARRAY HPV Tests  

Science Journals Connector (OSTI)

...automated extraction system, using the TNA kit...procedure. The present study sought to evaluate...labor-intensive than other systems, such as the automated...Although the present study evaluated the utility...automated MP extraction system would find this procedure...au | Comparative Study Evaluation Studies...

Matthew P. Stevens; Elice Rudland; Suzanne M. Garland; Sepehr N. Tabrizi

2006-07-01T23:59:59.000Z

438

Life Cycle Greenhouse Gas Emissions from Concentrating Solar Power  

E-Print Network (OSTI)

Life Cycle Greenhouse Gas Emissions from Concentrating Solar Power Over the last thirty years, more than 100 life cycle assessments (LCAs) have been conducted and published for a variety of utility-scale concentrating solar power (CSP) systems. These LCAs have yielded wide-ranging results. Variation could

439

FRAMES User Defined Body Burden Concentration File Module Documentation  

SciTech Connect

The Framework for Risk Analysis in Multimedia Environmental Systems (FRAMES) Body Burden Concentration File (BBF) contains time-varying, instantaneous, constituent concentrations for body burden by contaminant. This report contains the requirements for this file and will be used by software engineers and testers to ensure that the file inputs properly.

Pelton, Mitchell A.; Rutz, Frederick C.; Eslinger, Melany A.; Gelston, Gariann M.

2001-06-01T23:59:59.000Z

440

Material and Chemical Processing (Concentrated Solar) (4 Activities)  

K-12 Energy Lesson Plans and Activities Web site (EERE)

Concentrated sunlight is a versatile and high-quality form of energy with several potential applications besides producing heat and electricity. Today, scientists are developing systems that use concentrated sunlight to detoxify hazardous wastes, to drive chemical reactions, and to treat materials for increased hardness and resistance to corrosion.

Note: This page contains sample records for the topic "linear concentrator 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

NREL: Concentrating Solar Power Research - Concentrating Solar Power  

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

Concentrating Solar Power Resource Maps Concentrating Solar Power Resource Maps These direct-normal solar radiation maps-filtered by solar resource and land availability-identify the most economically suitable lands available for deploying of large-scale concentrating solar power plants in the southwestern United States. Each of the following seven states, as well as the southwestern U.S. region, has two maps: the left and right maps represent analyses excluding land with slopes >1% and >3%, respectively. Lower-resolution jpg versions are available below; much higher-resolution pdf files, suitable for plotting large-scale posters, can be requested. You can also access an unfiltered direct-normal solar radiation map of the southwestern United States. Download Adobe Reader. Southwestern U.S.

442

Design and development of a high-concentration photovoltaic concentrator  

SciTech Connect

The design and development of a high concentration photovoltaic concentrator module is discussed. The design concept described herein incorporates a curved groove domed Fresnel lens, a high concentration etched multiple vertical junction (EMVJ) solar cell and a passively cooled direct-bonded copper cell mount all packaged in a plastic module. Two seven inch diameter 1200x domed Fresnel lenses were fabricated using single point diamond turning technology. Testing at both GE and Sandia confirmed optical transmission efficiencies of over 83%. Samples of the latest available EMVJ cells were mounted and installed, with a domed Fresnel lens, into a prototype module. Subsequent testing demonstrated net lens-cell efficiencies of 10 to 13%. As a result of this program, salient conclusions have been formulated as to this technology.

Hodge, R C

1982-04-01T23:59:59.000Z

443

Phase Change Materials for Thermal Energy Storage in Concentrated Solar Thermal Power Plants.  

E-Print Network (OSTI)

??Experimental studies are presented that aim to utilize phase change materials (PCM's) to enhance thermal energy storage systems for concentrated solar thermal power (CSP) systems.… (more)

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

444

Unit I-4 More about linear maps 1 More about linear maps  

E-Print Network (OSTI)

Unit I-4 More about linear maps 1 Unit I-4 More about linear maps Unit I-4 More about linear maps 2 Using bases to define linear maps · V, U vector spaces · a unique linear map T: V U is determined · if v = a1v1 + ... + anvn then T(v) = a1T(v1) + ... + anT(vn) Unit I-4 More about linear maps 3 Example

Birkett, Stephen

445

Cryogenic technology boosts linear accelerator capability  

Science Journals Connector (OSTI)

Cryogenic technology boosts linear accelerator capability ... Two critical properties of matter at cryogenic temperatures—superconductivity and superfluidity—should open the way for a major advance in electron linear accelerator capability. ...

1968-05-06T23:59:59.000Z

446

Ultrashort Pulse Propagation in the Linear Regime  

E-Print Network (OSTI)

First, we investigate the Bouguer-Lambert-Beer (BLB) law as applied to the transmission of ultrashort pulses through water in the linear absorption regime. We present a linear theory for propagation of ultrashort laser pulses, and related...

Wang, Jieyu

2010-07-14T23:59:59.000Z

447

Liquid cooled, linear focus solar cell receiver  

DOE Patents (OSTI)

Separate structures for electrical insulation and thermal conduction are established within a liquid cooled, linear focus solar cell receiver for use with parabolic or Fresnel optical concentrators. The receiver includes a V-shaped aluminum extrusion having a pair of outer faces each formed with a channel receiving a string of solar cells in thermal contact with the extrusion. Each cell string is attached to a continuous glass cover secured within the channel with spring clips to isolate the string from the external environment. Repair or replacement of solar cells is effected simply by detaching the spring clips to remove the cover/cell assembly without interrupting circulation of coolant fluid through the receiver. The lower surface of the channel in thermal contact with the cells of the string is anodized to establish a suitable standoff voltage capability between the cells and the extrusion. Primary electrical insulation is provided by a dielectric tape disposed between the coolant tube and extrusion. Adjacent solar cells are soldered to interconnect members designed to accommodate thermal expansion and mismatches. The coolant tube is clamped into the extrusion channel with a releasably attachable clamping strip to facilitate easy removal of the receiver from the coolant circuit.

Kirpich, Aaron S. (Broomall, PA)

1985-01-01T23:59:59.000Z

448

Liquid cooled, linear focus solar cell receiver  

DOE Patents (OSTI)

Separate structures for electrical insulation and thermal conduction are established within a liquid cooled, linear focus solar cell receiver for use with parabolic or Fresnel optical concentrators. The receiver includes a V-shaped aluminum extrusion having a pair of outer faces each formed with a channel receiving a string of solar cells in thermal contact with the extrusion. Each cell string is attached to a continuous glass cover secured within the channel with spring clips to isolate the string from the external environment. Repair or replacement of solar cells is effected simply by detaching the spring clips to remove the cover/cell assembly without interrupting circulation of coolant fluid through the receiver. The lower surface of the channel in thermal contact with the cells of the string is anodized to establish a suitable standoff voltage capability between the cells and the extrusion. Primary electrical insulation is provided by a dielectric tape disposed between the coolant tube and extrusion. Adjacent solar cells are soldered to interconnect members designed to accommodate thermal expansion and mismatches. The coolant tube is clamped into the extrusion channel with a releasably attachable clamping strip to facilitate easy removal of the receiver from the coolant circuit.

Kirpich, A.S.

1983-12-08T23:59:59.000Z

449

The Next Linear Collider Program  

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

To use the left side navigation on this page, you will need to turn on To use the left side navigation on this page, you will need to turn on Javascript. You do not need JavaScript to use the text-based navigation bar at the bottom of the page. The Next Linear Collider at SLAC Navbar MISSION: Scientists expect research at this facility to answer fundamental questions about the behavior of matter and the origins of the Universe. NLC 8-Pack on the Drawing Board What's New In the Next Linear Collider: • NLC Newsletter October, 2001 • NLC Snowmass report 2001 • NLC All Hands Talk, August 2001 Upcoming Events: • Fall 2001 Working Sessions, Oct. 22-23, 2001 • Pulse Compression Workshop, Oct. 22-24, 2001 • Machine Advisory Committee Mtg., Oct. 24-26, 2001 • ISG-7 at KEK, Nov. 12-15, 2001 • LC' 02 at SLAC, Feb. 4-8, 2002 NLC Website Search: Entire SLAC Web | Help |

450

Challenges in future linear colliders  

SciTech Connect

For decades, electron-positron colliders have been complementing proton-proton colliders. But the circular LEP, the largest e-e+ collider, represented an energy limit beyond which energy losses to synchrotron radiation necessitate moving to e-e+ linear colliders (LCs), thereby raising new challenges for accelerator builders. Japanese-American, German, and European collaborations have presented options for the Future Linear Collider (FLC). Key accelerator issues for any FLC option are the achievement of high enough energy and luminosity. Damping rings, taking advantage of the phenomenon of synchrotron radiation, have been developed as the means for decreasing beam size, which is crucial for ensuring a sufficiently high rate of particle-particle collisions. Related challenges are alignment and stability in an environment where even minute ground motion can disrupt performance, and the ability to monitor beam size. The technical challenges exist within a wider context of socioeconomic and political challenges, likely necessitating continued development of international collaboration among parties involved in accelerator-based physics.

Swapan Chattopadhyay; Kaoru Yokoya

2002-09-02T23:59:59.000Z

451

Coded Adaptive Linear Precoded Discrete Multitone Over PLC Channel  

E-Print Network (OSTI)

Coded Adaptive Linear Precoded Discrete Multitone Over PLC Channel Fahad Syed Muhammmad, Jean- DMT system is presented in the power line communication (PLC) context with a loading algorithm which spectral density constraint. Using a multipath model of PLC channel, it is shown that the proposed coded

Boyer, Edmond

452

Resurgence, Stokes phenomenon and alien derivatives for levelone linear  

E-Print Network (OSTI)

Resurgence, Stokes phenomenon and alien derivatives for level­one linear di#erential systems. Mich of alien derivatives. We make explicit the Stokes­Ramis matrices as functions of the connection constants, summability, resurgence, alien derivatives. AMS classification: 34M03, 34M30, 34M35, 34M40. 1 #12; Loday

453

-okfl ^ ORNL/CON-172 Linear Harmonic Analysis of Free-  

E-Print Network (OSTI)

Stirling Engines N. C. J. Chen F. P. Griffin OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC/dynamic problem that is associated with a free-piston Stirling engine (FPSE). The governing equations. #12;ORNL/CON-172 Engineering Technology Division* LINEAR HARMONIC ANALYSIS OF FREE-PISTON STIRLING

Oak Ridge National Laboratory

454

Time-varying Linear Regression with Total Variation Regularization  

E-Print Network (OSTI)

a sparse set of parameters describing the energy consumption of a refrigerator and enables us to predict in the time series. Our motivating example is the problem of modeling and predicting energy consumption learn- ing the parameters of multiple linear systems as well as the change points that describe when

Murphy, Robert F.

455

General linear methods for Volterra integral equations  

Science Journals Connector (OSTI)

We investigate the class of general linear methods of order p and stage order q=p for the numerical solution of Volterra integral equations of the second kind. Construction of highly stable methods based on the Schur criterion is described and examples ... Keywords: Convolution test equation, General linear methods, Linear stability analysis, Order conditions, Volterra integral equations

G. Izzo; Z. Jackiewicz; E. Messina; A. Vecchio

2010-09-01T23:59:59.000Z

456

Low-Cost, Lightweight Solar Concentrators  

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

Concentrators Concentrators California Institute of Technology/Jet Propulsion Laboratory Award Number:0595-1612 | January 15, 2013 | Ganapathi Thin Film mirror is ~40-50% cheaper and 60% lighter than SOA * Project leverages extensive space experience by JPL and L'Garde to develop a low-cost parabolic dish capable of providing 4 kW thermal. Key features: * Metallized reflective thin film material with high reflectivity (>93%) with polyurethane foam backing * Single mold polyurethane backing fabrication enables low cost high production manufacturing * Ease of panel installation and removal enables repairs and results in a low total life cycle cost * Deployment of multiple dishes enhances system level optimizations by simulating larger fields which addresses issues like shared resources

457

NREL: Concentrating Solar Power Research - Partnerships  

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

Partnerships Partnerships NREL maintains partnerships to advance concentrating solar power research, development, and deployment efforts. Currently, NREL works with Sandia National Laboratories in Albuquerque, New Mexico, through SunLab-a partnership developed by the U.S. Department of Energy to administer its concentrating solar power R&D and analysis activities. SolarPACES Solar Power and Chemical Energy Systems (SolarPACES), an international program of the International Energy Agency, furthers collaborative development, testing, and marketing of CSP plants. NREL represents the U.S. activities and serves on various committees in SolarPACES, which now has 13 members: Algeria, Australia, Egypt, the European Commission, France, Germany, Israel, Mexico, South Africa, South Korea, Spain, Switzerland, and

458

Thermal regeneration of an electrochemical concentration cell  

DOE Patents (OSTI)

A system and method for thermally regenerating an electrochemical concentration cell having first and second aluminum electrodes respectively positioned in contact with first and second electrolytes separated by an ion exchange member, the first and second electrolytes being composed of different concentrations of an ionic solvent and a salt, preferably an aluminum halide. The ionic solvent may be either organic or inorganic with a relatively low melting point, the ionic solvent and the salt form a complex wherein the free energy of formation of said complex is less than about -5 Kcal/mole. A distillation column using solar heat or low grade industrial waste heat receives the first and second electrolytes and thermally decomposes the salt-solvent complex to provide feed material for the two half cells.

Krumpelt, Michael (Naperville, IL); Bates, John K. (Plainfield, IL)

1981-01-01T23:59:59.000Z

459

Thermal regeneration of an electrochemical concentration cell  

DOE Patents (OSTI)

A system and method are described for thermally regenerating an electrochemical concentration cell having first and second aluminum electrodes respectively positioned in contact with first and second electrolytes separated by an ion exchange member, the first and second electrolytes being composed of different concentrations of an ionic solvent and a salt, preferably an aluminum halide. The ionic solvent may be either organic or inorganic with a relatively low melting point, the ionic solvent and the salt form a complex wherein the free energy of formation of said complex is less than about -5 kcal/mole. A distillation column using solar heat or low grade industrial waste heat receives the first and second electrolytes and thermally decomposes the salt-solvent complex to provide feed material for the two half cells.

Krumpelt, M.; Bates, J.K.

1980-05-09T23:59:59.000Z

460

Multijunction Photovoltaic Technologies for High-Performance Concentrators: Preprint  

SciTech Connect

Multijunction solar cells provide high-performance technology pathways leading to potentially low-cost electricity generated from concentrated sunlight. The National Center for Photovoltaics at the National Renewable Energy Laboratory has funded different III-V multijunction solar cell technologies and various solar concentration approaches. Within this group of projects, III-V solar cell efficiencies of 41% are close at hand and will likely be reported in these conference proceedings. Companies with well-developed solar concentrator structures foresee installed system costs of $3/watt--half of today's costs--within the next 2 to 5 years as these high-efficiency photovoltaic technologies are incorporated into their concentrator photovoltaic systems. These technology improvements are timely as new large-scale multi-megawatt markets, appropriate for high performance PV concentrators, open around the world.

McConnell, R.; Symko-Davies, M.

2006-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "linear concentrator 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

Linear Collider Collaboration Tech Notes  

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

1 1 May 2001 Lattice Description for NLC Damping Rings at 120 Hz Andrzej Wolski Lawrence Berkeley National Laboratory Abstract: We present a lattice design for the NLC Main Damping Rings at 120 Hz repe tition rate. A total wiggler length of a little over 46 m is needed to achieve the damping time required for extracted, normalized, vertical emittance below 0.02 mm mrad. The dynamic aperture (using a linear model for the wiggler) is in excess of 15 times the injected beam size. The principal lattice parameters and characteristics are presented in this note; we also outline results of studies of alignment and field quality tolerances. CBP Tech Note-227 LCC-0061 Lattice Description for NLC Main Damping Rings at 120 Hz Andrzej Wolski Lawrence Berkeley National Laboratory

462

Linear Collider Collaboration Tech Notes  

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

0 0 April 2001 Rev.1 July 2003 Guide to LIBXSIF, a Library for Parsing the Extended Standard Input Format of Accelerated Beamlines Peter G. Tenenbaum Stanford Linear Accelerator Center Stanford University Stanford, CA Abstract: We describe LIBXSIF, a standalone library for parsing the Extended Standard Input Format of accelerator beamlines. Included in the description are: documentation of user commands; full description of permitted accelerator elements and their attributes; the construction of beamline lists; the mechanics of adding LIBXSIF to an existing program; and "under the hood" details for users who wish to modify the library or are merely morbidly curious. Guide to LIBXSIF, a Library for Parsing the Extended Standard Input Format of

463

Linear Collider Collaboration Tech Notes  

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

NLC Home Page NLC Technical SLAC The LCC Tech Note series was started in July 1998 to document the JLC/NLC collaborative design effort. The notes are numbered sequentially and may also be given a SLAC, FNAL, LBNL, LLNL and/or KEK publication number. The LCC notes will be distributed through the Web in electronic form as PDF files -- the authors are responsible for keeping the original documents. Other document series are the NLC Notes that were started for the SLAC ZDR, the KEK ATF Notes, and at some future time there should be a series of Technical (NLD) Notes to document work on detector studies for the next-generation linear collider. LCC-0001 "Memorandum of Understanding between KEK and SLAC," 2/98. LCC-0002 "Transparencies and Summaries from the 1st ISG meeting: January 1998," G. Loew, ed., 2/98.

464

Linear Collider Collaboration Tech Notes  

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

5 08//00 5 08//00 Study of Beam Energy Spectrum Measurement in the NLC Extraction Line August 2000 Yuri Nosochkov and Tor Raubenheimer Stanford Linear Accelerator Center Stanford, CA Abstract: The NLC extraction line optics includes a secondary focal point with a very small _- function and 2 cm dispersion which can be used for measurement of outgoing beam energy spread. In this study, we performed tracking simulations to transport the NLC disrupted beam from the Interaction Point (IP) to the extraction line secondary focus (the IP image), `measure' the transverse beam pro_le at the IP image and reconstruct the beam energy spectrum. The resultant distribution was compared with the original energy spectrum at the IP. Study of Beam Energy Spectrum Measurement

465

Linear Collider Collaboration Tech Notes  

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

2 03/12/99 2 03/12/99 PEP-II RF Cavity Revisited December 3, 1999 R. Rimmer, G. Koehler, D. Li, N. Hartmann, N. Folwell, J. Hodgson, B. McCandless Lawrence Berkeley National Laboratory Stanford Linear Accelerator Center Berkeley, CA, USA Stanford, CA, USA Abstract: This report describes the results of numerical simulations of the PEP-II RF cavity performed after the completion of the construction phase of the project and comparisons are made to previous calculations and measured results. These analyses were performed to evaluate new calculation techniques for the HOM distribution and RF surface heating that were not available at the time of the original design. These include the use of a high frequency electromagnetic element in ANSYS and the new Omega 3P code to study wall

466

Linear Collider Collaboration Tech Notes  

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

4, 10/03/00 4, 10/03/00 Luminosity for NLC Design Variations March 10, 1999 K.A. Thompson and T.O. Raubenheimer Stanford Linear Accelerator Center Stanford, CA, USA Abstract: In this note we give Guineapig simulation results for the luminosity and luminosity spectrum of three baseline NLC designs at 0.5~TeV and 1.0~TeV and compare the simulation results with analytic approximations. We examine the effects of varying several design parameters away from the NLC-B-500 and NLC-B-1000 designs, in order to study possible trade-offs of parameters that could ease tolerances, increase luminosity, or help to optimize machine operation for specific physics processes. Luminosity for NLC Design Variations K.A. Thompson and T.O.Raubenheimer INTRODUCTION In this note we give Guineapig [l] simulation results for the luminosity and

467

Linear Collider Collaboration Tech Notes  

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

Notes Notes LCC - 0038 29/04/00 CBP Tech Note - 234 Transverse Field Profile of the NLC Damping Rings Electromagnet Wiggler 29 April 2000 17 J. Corlett and S. Marks Lawrence Berkeley National Laboratory M. C. Ross Stanford Linear Accelerator Center Stanford, CA Abstract: The primary effort for damping ring wiggler studies has been to develop a credible radiation hard electromagnet wiggler conceptual design that meets NLC main electron and positron damping ring physics requirements [1]. Based upon an early assessment of requirements, a hybrid magnet similar to existing designs satisfies basic requirements. However, radiation damage is potentially a serious problem for the Nd-Fe-B permanent magnet material, and cost remains an issue for samarium cobalt magnets. Superconducting magnet designs have not been

468

Definition: Phasor Data Concentrator (PDC) | Open Energy Information  

Open Energy Info (EERE)

Phasor Data Concentrator (PDC) Phasor Data Concentrator (PDC) Jump to: navigation, search Dictionary.png Phasor Data Concentrator (PDC) Receives and time-synchronizes phasor data from multiple phasor measurement units (PMUs) to produce a real-time, time-aligned output data stream. A PDC can exchange phasor data with PDCs at other locations. Through use of multiple PDCs, multiple layers of concentration can be implemented within an individual synchrophasor data system.[1] Related Terms smart grid References ↑ https://www.smartgrid.gov/category/technology/phasor_data_concentrator_pdc [[C LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ategory: Smart Grid Definitions|Template:BASEPAGENAME]] Retrieved from "http://en.openei.org/w/index.php?title=Definition:Phasor_Data_Concentrator_(PDC)&oldid=493108"

469

ACCELERATED IMPROVEMENT A CONCENTRATED APPROACH  

E-Print Network (OSTI)

ACCELERATED IMPROVEMENT A CONCENTRATED APPROACH FOR CONTINUOUS IMPROVEMENT #12;Accelerated.quality.wisc.edu O F F I C E O F Q U A L I T Y I M P R O V E M E N T Accelerated Improvement This guide to improving resources. You will find helpful information needed to conduct an Accelerated Improvement project

Shapiro, Vadim

470

Physics and Astronomy Geophysics Concentration  

E-Print Network (OSTI)

Physics and Astronomy Geophysics Concentration Strongly recommended courses Credits Term Dept. to Geophysics 3 PHY 3230 Thermal Physics 3 CHE 1101 Introductory Chemistry - I 3 CHE 1110 Introductory Chemistry Laboratory - I 1 GLY 1101 Intro. to Physical Geology 4 GLY 2250 Evolution of the Earth 4 GLY 4705 Adv

Thaxton, Christopher S.

471

Linearity of Climate Response to Increases in Black Carbon Aerosols  

SciTech Connect

The impact of absorbing aerosols on global climate are not completely understood. Here, we present results of idealized experiments conducted with the Community Atmosphere Model (CAM4) coupled to a slab ocean model (CAM4-SOM) to simulate the climate response to increases in tropospheric black carbon aerosols (BC) by direct and semi-direct effects. CAM4-SOM was forced with 0, 1x, 2x, 5x and 10x an estimate of the present day concentration of BC while maintaining their estimated present day global spatial and vertical distribution. The top of the atmosphere (TOA) radiative forcing of BC in these experiments is positive (warming) and increases linearly as the BC burden increases. The total semi-direct effect for the 1x experiment is positive but becomes increasingly negative for higher BC concentrations. The global average surface temperature response is found to be a linear function of the TOA radiative forcing. The climate sensitivity to BC from these experiments is estimated to be 0.42 K $\\textnormal W^{-1} m^{2}$ when the semi-direct effects are accounted for and 0.22 K $\\textnormal W^{-1} m^{2}$ with only the direct effects considered. Global average precipitation decreases linearly as BC increases, with a precipitation sensitivity to atmospheric absorption of 0.4 $\\%$ $\\textnormal W^{-1} \\textnormal m^{2}$ . The hemispheric asymmetry of BC also causes an increase in southward cross-equatorial heat transport and a resulting northward shift of the inter-tropical convergence zone in the simulations at a rate of 4$^{\\circ}$N $\\textnormal PW^{-1}$. Global average mid- and high-level clouds decrease, whereas the low-level clouds increase linearly with BC. The increase in marine stratocumulus cloud fraction over the south tropical Atlantic is caused by increased BC-induced diabatic heating of the free troposphere.

Mahajan, Salil [ORNL; Evans, Katherine J [ORNL; Hack, James J [ORNL; Truesdale, John [National Center for Atmospheric Research (NCAR)

2013-01-01T23:59:59.000Z

472

Linear Transformer Ideal Transformer Consider linear and ideal transformers attached to Circuit 1 and Circuit 2.  

E-Print Network (OSTI)

Linear Transformer Ideal Transformer I1 + V2 _ + V1 _ Consider linear and ideal transformers in linear transformer equations for :MLL ,, 21 ( ) ( ) ( ) ( ) ( ) ( ) 12212212 2 1 112 2 12 2 1 2212 2 PP Now solve the linear transformer equations for the currents: 1 212 2 22 2 1 2 1 212 2 22 12 2 2 2

Kozick, Richard J.

473

Optical measurement of drug concentrations in tissue  

SciTech Connect

This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). The aim of this project was to develop noninvasive fiber-optic methods for measuring drug concentrations in tissue. Such a system would make possible the study of chemotherapy drug kinetics at specific, targeted locations in the body after the drug is administered. The major result of this project is the development of techniques for measuring changes in absorption of a medium with unknown scattering properties. The developed method was verified by testing on several media with scattering properties in the range typically found for tissue.

Mourant, J.R.; Bigio, I.J.; Jack, D.A.; Johnson, T.M.; Miller, H.D. [Los Alamos National Lab., NM (United States). Chemical Sciences and Technology Div.

1997-10-01T23:59:59.000Z

474

Development of integral bladed rotor using linear optimisation technique  

Science Journals Connector (OSTI)

Bladed disks are the most flexible elements in high speed rotating machinery. Stress analysis of these elements present some challenges. These challenges stem from high stress gradients due to contact faces, the non-linearities attending conforming contact with friction. Thermal gradients are also encountered across the disc bore and rim due to uneven temperature distribution. The rim of the disc is made heavier to resist the centrifugal pull of the blade, thus making the assembly heavier. Investigations have been carried out to develop and improve 'blisks' which are integrated version of blades and disc, offering significant weight saving. The present paper describes the possible development process of upgrading a general purpose conventional bladed disc of a single stage compressor into blisk, using linear programme, a finite element analysis tool for linear optimisation, as a dedicated 'design-tool' keeping the same operating conditions and the allowable design limits through numerical models. Design methodology, burst-failure criteria of blisk and bladed disc are discussed in full length. This tool developed exploits the quick convergence ability of a linear system for handling large iterations and overcomes the limitation imposed by material non-linearity, over-speed and burst margin for all decision points based on stress, strain and displacement, in the design-flow process.

K. Kumar; S.L. Ajit Prasad; K. Ramachandra

2012-01-01T23:59:59.000Z

475

Development of a prototype lignin concentration sensor  

SciTech Connect

The US Department of Energy, Office of Industrial Technologies, is sponsoring a research and development program for the development of a real-time, in-situ sensor to measure the concentration of lignin in wood pulp. The program is composed of phase I showing feasibility which is now complete, phase II for development and testing of a Field Prototype, in progress, Phase III commercialization. Phase I work (funded entirely by B&W) demonstrated a correlation between the fluorescence intensity and lignin concentration (as measured by TAPPI procedure, T 236 hm-85 Kappa Number of Pulp) for undiluted wood pulp samples. In Phase II, a laboratory test program directed at characterizing the fluorescence of wood pulp has been conducted as a prelude to the design of a prototype sensor. The current report summarizes the testing completed in Phase I and documents the Phase II laboratory testing completed through December 1991. Future Phase II efforts include additional laboratory testing, design and fabrication of a prototype sensor, and field testing of the prototype sensor. Phase III of the program will concentrate on the incorporation of the sensor into a control system and commercialization of the sensor.

Malito, M.L.; Jeffers, L.A.

1993-01-01T23:59:59.000Z

476

Development of a prototype lignin concentration sensor  

SciTech Connect

The US Department of Energy, Office of Industrial Technologies, is sponsoring a research and development program for the development of a real-time, in-situ sensor to measure the concentration of lignin in wood pulp. The program is composed of phase I showing feasibility which is now complete, phase II for development and testing of a Field Prototype, in progress, Phase III commercialization. Phase I work (funded entirely by B W) demonstrated a correlation between the fluorescence intensity and lignin concentration (as measured by TAPPI procedure, T 236 hm-85 Kappa Number of Pulp) for undiluted wood pulp samples. In Phase II, a laboratory test program directed at characterizing the fluorescence of wood pulp has been conducted as a prelude to the design of a prototype sensor. The current report summarizes the testing completed in Phase I and documents the Phase II laboratory testing completed through December 1991. Future Phase II efforts include additional laboratory testing, design and fabrication of a prototype sensor, and field testing of the prototype sensor. Phase III of the program will concentrate on the incorporation of the sensor into a control system and commercialization of the sensor.

Malito, M.L.; Jeffers, L.A.

1993-01-01T23:59:59.000Z

477

Design and Analysis of a High-Efficiency, Cost-Effective Solar Concentrator John H. Reif  

E-Print Network (OSTI)

that concentrate solar energy for conversion into usable energy. Ideally, a solar concentrating system should have, wind and sand loading, and abrasion. Many arid and desert areas, best suited for solar energy advantages of our solar concentrating system: are low cost and durability. Unlike most prior solar

Reif, John H.

478

Estimation of Heavy Ion Densities From Linearly Polarized EMIC Waves At Earth  

SciTech Connect

Linearly polarized EMIC waves are expected to concentrate at the location where their wave frequency satisfies the ion-ion hybrid (IIH) resonance condition as the result of a mode conversion process. In this letter, we evaluate absorption coefficients at the IIH resonance in the Earth geosynchronous orbit for variable concentrations of helium and azimuthal and field-aligned wave numbers in dipole magnetic field. Although wave absorption occurs for a wide range of heavy ion concentration, it only occurs for a limited range of azimuthal and field-aligned wave numbers such that the IIH resonance frequency is close to, but not exactly the same as the crossover frequency. Our results suggest that, at L = 6.6, linearly polarized EMIC waves can be generated via mode conversion from the compressional waves near the crossover frequency. Consequently, the heavy ion concentration ratio can be estimated from observations of externally generated EMIC waves that have polarization.

Kim, Eun-Hwa; Johnson, Jay R.; Lee, Dong-Hun

2014-02-24T23:59:59.000Z

479

Cylindrical acoustic levitator/concentrator  

DOE Patents (OSTI)

A low-power, inexpensive acoustic apparatus for levitation and/or concentration of aerosols and small liquid/solid samples having particulates up to several millimeters in diameter in air or other fluids is described. It is constructed from a commercially available, hollow cylindrical piezoelectric crystal which has been modified to tune the resonance frequency of the breathing mode resonance of the crystal to that of the interior cavity of the cylinder. When the resonance frequency of the interior cylindrical cavity is matched to the breathing mode resonance of the cylindrical piezoelectric transducer, the acoustic efficiency for establishing a standing wave pattern in the cavity is high. The cylinder does not require accurate alignment of a resonant cavity. Water droplets having diameters greater than 1 mm have been levitated against the force of gravity using; less than 1 W of input electrical power. Concentration of aerosol particles in air is also demonstrated.

Kaduchak, Gregory (Los Alamos, NM); Sinha, Dipen N. (Los Alamos, NM)

2002-01-01T23:59:59.000Z

480

Development of concentrator solar cells  

SciTech Connect

A limited pilot production run on PESC silicon solar cells for use at high concentrations (200 to 400 suns) is summarized. The front contact design of the cells was modified for operation without prismatic covers. The original objective of the contract was to systematically complete a process consolidation phase, in which all the, process improvements developed during the contract would be combined in a pilot production run. This pilot run was going to provide, a basis for estimating cell costs when produced at high throughput. Because of DOE funding limitations, the Photovoltaic Concentrator Initiative is on hold, and Applied Solar`s contract was operated at a low level of effort for most of 1993. The results obtained from the reduced scope pilot run showed the effects of discontinuous process optimization and characterization. However, the run provided valuable insight into the technical areas that can be optimized to achieve the original goals of the contract.

Not Available

1994-08-01T23:59:59.000Z

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


481

Concentration polarization in gas permeation  

SciTech Connect

It was verified that the selectivity of very thin (1 {mu}m thick) PDMS (polydimethylsiloxane) composite membranes for gaseous binary mixtures, like nitrogen and a hydrocarbon (HC), is as much as five times smaller than for the same mixture using a thick membrane (15 {mu}m-thick). This phenomenon is due to the build-up of the less permeable gas on the retentate side over the membrane and is known as the concentration polarization effect. In this paper we present a model for the gas concentration polarization effect based in the film theory and compare with the experimental results for the nitrogen-pentane separation using a PDMS membrane. 8 refs., 6 figs.

Mendes, A.M.M. [Univ. of Porto (Portugal); Alpers, A.; Peinemann, K.V.; Ohlrogge, K. [GKSS-Research Centre, Geesthacht (Germany)

1996-12-31T23:59:59.000Z

482

EC PVSEC, Glasgow, May 2000 EFFICIENT 20-50 SUN CONCENTRATOR CELLS  

E-Print Network (OSTI)

for Sustainable Energy Systems Australian National University, 0200, Australia andrew.blakers@anu.edu.au ABSTRACT concentration system. It comprises two-axis sun-tracking parabolic glass mirrors and a receiver with solar cells. INTRODUCTION Concentrator systems have a number of important advantages over conventional PV systems, the main

483

Photovoltaic concentrator module improvements study  

SciTech Connect

This report presents results of a project to design and fabricate an improved photovoltaic concentrator module. Using previous work as a baseline, this study conducted analyses and testing to select major module components and design features. The lens parquet and concentrator solar cell were selected from the highest performing, available components. A single 185X point-focus module was fabricated by the project team and tested at Sandia. Major module characteristics include a 6 by 4 compression-molded acrylic lens parquet (0.737 m{sup 2} area), twenty-four 0.2 ohms-cm, FZ, p-Si solar cells (1.56 cm{sup 2} area) soldered to ceramic substrates and copper heat spreaders, and an aluminized steel housing with corrugated bottom. This project marked the first attempt to use prismatic covers on solar cells in a high-concentration, point-focus application. Cells with 15 percent metallization were obtained, but problems with the fabrication and placement of prismatic covers on these cells lead to the decision not to use covers in the prototype module. Cell assembly fabrication, module fabrication, and module optical design activities are presented here. Test results are also presented for bare cells, cell assemblies, and module. At operating conditions of 981 watts/m{sup 2} DNI and an estimated cell temperature of 65{degrees}C, the module demonstrated an efficiency of 13.9 percent prior to stressed environmental exposure. 12 refs., 56 figs., 7 tabs.

Levy, S.L.; Kerschen, K.A. (Black and Veatch, Kansas City, MO (United States)); Hutchison, G. (Solar Kinetics, Inc., Dallas, TX (United States)); Nowlan, M.J. (Spire Corp., Bedford, MA (United States))

1991-08-01T23:59:59.000Z

484

On the Low Rank Solutions for Linear Matrix Inequalities Yongwei Huang  

E-Print Network (OSTI)

On the Low Rank Solutions for Linear Matrix Inequalities Wenbao Ai Yongwei Huang Shuzhong Zhang September 2006 Abstract In this paper we present a polynomial-time procedure to find a low rank solution for a system of Linear Matrix Inequalities (LMI). The existence of such a low rank solution was shown in Au

Zhang, Shuzhong

485

Project Profile: Commercial Development of an Advanced Linear-Fresnel-Based CSP Concept  

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

SkyFuel, under the CSP R&D FOA, is developing a commercial linear-Fresnel-based advanced CSP system called Linear Power Tower (LPT). The company aims to make significant improvements in the cost and viability of utility-scale dispatchable solar power.

486

Characteristics of identifying linear dynamic models from impulse response data using Prony analysis  

SciTech Connect

The purpose of the study was to investigate the characteristics of fitting linear dynamic models to the impulse response of oscillatory dynamic systems using Prony analysis. Many dynamic systems exhibit oscillatory responses with multiple modes of oscillations. Although the underlying dynamics of such systems are often nonlinear, it is frequently possible and very useful to represent the system operating about some set point with a linear model. Derivation of such linear models can be done using two basic approaches: model the system using theoretical derivations and some linearization method such as a Taylor series expansion; or use a curve-fitting technique to optimally fit a linear model to specified system response data. Prony analysis belongs to the second class of system modeling because it is a method of fitting a linear model to the impulse response of a dynamic system. Its parallel formulation inherently makes it well suited for fitting models to oscillatory system data. Such oscillatory dynamic effects occur in large synchronous-generator-based power systems in the form of electromechanical oscillations. To study and characterize these oscillatory dynamics, BPA has developed computer codes to analyze system data using Prony analysis. The objective of this study was to develop a highly detailed understanding of the properties of using Prony analysis to fit models to systems with characteristics often encountered in power systems. This understanding was then extended to develop general rules-of-thumb'' for using Prony analysis. The general characteristics were investigated by performing fits to data from known linear models under controlled conditions. The conditions studied include various mathematical solution techniques; different parent system configurations; and a large variety of underlying noise characteristics.

Trudnowski, D.J.

1992-12-01T23:59:59.000Z

487

Characteristics of identifying linear dynamic models from impulse response data using Prony analysis  

SciTech Connect

The purpose of the study was to investigate the characteristics of fitting linear dynamic models to the impulse response of oscillatory dynamic systems using Prony analysis. Many dynamic systems exhibit oscillatory responses with multiple modes of oscillations. Although the underlying dynamics of such systems are often nonlinear, it is frequently possible and very useful to represent the system operating about some set point with a linear model. Derivation of such linear models can be done using two basic approaches: model the system using theoretical derivations and some linearization method such as a Taylor series expansion; or use a curve-fitting technique to optimally fit a linear model to specified system response data. Prony analysis belongs to the second class of system modeling because it is a method of fitting a linear model to the impulse response of a dynamic system. Its parallel formulation inherently makes it well suited for fitting models to oscillatory system data. Such oscillatory dynamic effects occur in large synchronous-generator-based power systems in the form of electromechanical oscillations. To study and characterize these oscillatory dynamics, BPA has developed computer codes to analyze system data using Prony analysis. The objective of this study was to develop a highly detailed understanding of the properties of using Prony analysis to fit models to systems with characteristics often encountered in power systems. This understanding was then extended to develop general ``rules-of-thumb`` for using Prony analysis. The general characteristics were investigated by performing fits to data from known linear models under controlled conditions. The conditions studied include various mathematical solution techniques; different parent system configurations; and a large variety of underlying noise characteristics.

Trudnowski, D.J.

1992-12-01T23:59:59.000Z

488

International Workshop on Linear Colliders 2010  

ScienceCinema (OSTI)

IWLC2010 International Workshop on Linear Colliders 2010ECFA-CLIC-ILC joint meeting: Monday 18 October - Friday 22 October 2010Venue: CERN and CICG (International Conference Centre Geneva, Switzerland) This year, the International Workshop on Linear Colliders organized by the European Committee for Future Accelerators (ECFA) will study the physics, detectors and accelerator complex of a linear collider covering both CLIC and ILC options.Contact Workshop Secretariat  IWLC2010 is hosted by CERN

None

2011-10-06T23:59:59.000Z

489

Linear degeneracy in the semiclassical atom  

Science Journals Connector (OSTI)

If the angular and radial quantum numbers of states with the same binding energy satisfy a linear relation, as is the situation in the Coulomb potential, the spectrum is said to be linearly degenerate. We present a detailed study of the consequences of such linear degeneracy in atomic potentials. One of the results is a new, and more general, derivation of Scott’s correction to the Thomas-Fermi energy.

Berthold-Georg Englert and Julian Schwinger

1985-07-01T23:59:59.000Z

490

Experiential Component Approval Form Concentration in Nanotechnology  

E-Print Network (OSTI)

Experiential Component Approval Form Concentration in Nanotechnology Return completed form to ENG Plan to complete the experiential component as a requirement for the concentration in Nanotechnology to complete the experiential component for the Nanotechnology Concentration by: Research Experience in Lab

Goldberg, Bennett

491

A microfabricated dielectrophoretic micro-organism concentrator  

E-Print Network (OSTI)

This project focuses on the development of a micro-organism concentrator. Pathogen detection, particularly MEMS based detection, is often limited by sample concentration. The proposed concentrator will interface with a ...

Muller, Rikky, 1980-

2004-01-01T23:59:59.000Z

492

DISSOLVED CONCENTRATION LIMITS OF RADIOACTIVE ELEMENTS  

SciTech Connect

The purpose of this study is to evaluate dissolved concentration limits (also referred to as solubility limits) of elements with radioactive isotopes under probable repository conditions, based on geochemical modeling calculations using geochemical modeling tools, thermodynamic databases, field measurements, and laboratory experiments. The scope of this modeling activity is to predict dissolved concentrations or solubility limits for 14 elements with radioactive isotopes (actinium, americium, carbon, cesium, iodine, lead, neptunium, plutonium, protactinium, radium, strontium, technetium, thorium, and uranium) important to calculated dose. Model outputs for uranium, plutonium, neptunium, thorium, americium, and protactinium are in the form of tabulated functions with pH and log (line integral) CO{sub 2} as independent variables, plus one or more uncertainty terms. The solubility limits for the remaining elements are either in the form of distributions or single values. The output data from this report are fundamental inputs for Total System Performance Assessment for the License Application (TSPA-LA) to determine the estimated release of these elements from waste packages and the engineered barrier system. Consistent modeling approaches and environmental conditions were used to develop solubility models for all of the actinides. These models cover broad ranges of environmental conditions so that they are applicable to both waste packages and the invert. Uncertainties from thermodynamic data, water chemistry, temperature variation, and activity coefficients have been quantified or otherwise addressed.

NA

2004-11-22T23:59:59.000Z

493

Optical monitor for water vapor concentration  

DOE Patents (OSTI)

A system for measuring and monitoring water vapor concentration in a sample uses as a light source an argon discharge lamp, which inherently emits light with a spectral line that is close to a water vapor absorption line. In a preferred embodiment, the argon line is split by a magnetic field parallel to the direction of light propagation from the lamp into sets of components of downshifted and upshifted frequencies of approximately 1575 Gauss. The downshifted components are centered on a water vapor absorption line and are thus readily absorbed by water vapor in the sample; the upshifted components are moved away from that absorption line and are minimally absorbed. A polarization modulator alternately selects the upshifted components or downshifted components and passes the selected components to the sample. After transmission through the sample, the transmitted intensity of a component of the argon line varies as a result of absorption by the water vapor. The system then determines the concentration of water vapor in the sample based on differences in the transmitted intensity between the two sets of components. In alternative embodiments alternate selection of sets of components is achieved by selectively reversing the polarity of the magnetic field or by selectively supplying the magnetic field to the emitting plasma. 5 figs.

Kebabian, P.

1998-06-02T23:59:59.000Z

494

Optical monitor for water vapor concentration  

DOE Patents (OSTI)

A system for measuring and monitoring water vapor concentration in a sample uses as a light source an argon discharge lamp, which inherently emits light with a spectral line that is close to a water vapor absorption line. In a preferred embodiment, the argon line is split by a magnetic field parallel to the direction of light propagation from the lamp into sets of components of downshifted and upshifted frequencies of approximately 1575 Gauss. The downshifted components are centered on a water vapor absorption line and are thus readily absorbed by water vapor in the sample; the upshifted components are moved away from that absorption line and are minimally absorbed. A polarization modulator alternately selects the upshifted components or downshifted components and passes the selected components to the sample. After transmission through the sample, the transmitted intensity of a component of the argon line varies as a result of absorption by the water vapor. The system then determines the concentration of water vapor in the sample based on differences in the transmitted intensity between the two sets of components. In alternative embodiments alternate selection of sets of components is achieved by selectively reversing the polarity of the magnetic field or by selectively supplying the magnetic field to the emitting plasma.

Kebabian, Paul (Acton, MA)

1998-01-01T23:59:59.000Z

495

Potential of Concentrating Solar Power in Canada  

Science Journals Connector (OSTI)

Abstract In this paper, results of an analysis to assess the potential of concentrating solar thermal power applications in Canada are presented. First, a direct normal solar resource (DNI) resource map for Canada is introduced. This map indicates the locations where the DNI is the highest in Canada and is derived from the most recent Perez's SUNY satellite-based solar resource model Version number 3. Second, the methodology and results of a GIS analysis to identify the locations of the most suitable lands for concentrating solar thermal power (CSP) applications in Canada are discussed. The total areas of the CSP-suitable lands are presented in a tabulated and a map formats for each of the Canadian provinces where there is a maximum DNI solar resource. Third and finally, results of a technical economical analysis for two CSP system designs are discussed. The two CSP systems considered include parabolic trough with synthetic oil heat transfer fluid with and without storage, molten salt power tower with and without storage.

R. Djebbar; D. Belanger; D. Boutin; E. Weterings; M. Poirier

2014-01-01T23:59:59.000Z

496

Subcritical Fission Reactor Based on Linear Collider  

E-Print Network (OSTI)

The beams of Linear Collider after main collision can be utilized to build an accelerator--driven sub--critical reactor.

I. F. Ginzburg

2005-07-29T23:59:59.000Z

497

Linear PM Generator for Wave Energy Conversion.  

E-Print Network (OSTI)

??The main objective of this thesis is to design a selected version of linear PM generator and to determine the electromechanical characteristics at variable operating… (more)

Parthasarathy, Rajkumar

2012-01-01T23:59:59.000Z

498

Ultra-high vacuum photoelectron linear accelerator  

DOE Patents (OSTI)

An rf linear accelerator for producing an electron beam. The outer wall of the rf cavity of said linear accelerator being perforated to allow gas inside said rf cavity to flow to a pressure chamber surrounding said rf cavity and having means of ultra high vacuum pumping of the cathode of said rf linear accelerator. Said rf linear accelerator is used to accelerate polarized or unpolarized electrons produced by a photocathode, or to accelerate thermally heated electrons produced by a thermionic cathode, or to accelerate rf heated field emission electrons produced by a field emission cathode.

Yu, David U.L.; Luo, Yan

2013-07-16T23:59:59.000Z

499

Huge market forecast for linear LDPE  

Science Journals Connector (OSTI)

Huge market forecast for linear LDPE ... It now appears that the success of the new technology, which rests largely on energy and equipment cost savings, could be overwhelming. ...

1980-08-25T23:59:59.000Z

500

LED Replacements for Linear Fluorescent Lamps Webcast  

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

In this June 20, 2011 webcast on LED products marketed as replacements for linear fluorescent lamps, Jason Tuenge of the Pacific Northwest National Laboratory (PNNL) discussed current Lighting...