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Note: This page contains sample records for the topic "daylighting control systems" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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1

Daylighting control systems : Daylighting The New York Times Building  

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

control systems control systems Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team Daylighting control systems Lighting energy savings were greater in zones daylit bilaterally from both the southwest and northwest facades, typically 50-60% at 11 feet from the windows and 25-40% at 14-25 feet from the façade. Total illuminance was maintained in all lighting zones to within -10% of the setpoint for 95-100% of the day throughout most of the nine-month monitored period. Daylight "harvesting" strategies are implemented using daylighting control systems that dim the electric lighting in response to interior daylight levels. For commercial applications, the light output of fluorescent lamps (T5 or T8) are varied by using electronic dimming ballasts. Photosensors, typically mounted in the ceiling, are used to measure the quantity of daylight in the space then determine the amount of dimming required to maintain the design work plane illuminance level. If daylight levels are more than adequate, the electric lights can be shut off. Simulation studies indicate that annual energy use and peak demand can be reduced by 20-30% compared to a non-daylit building. These technological solutions are increasingly becoming one of the key means to achieving compliance with stringent energy-efficiency standards and achieving LEED ratings for sustainable design.

2

New and Underutilized Technology: Integrated Daylighting Systems |  

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

Integrated Daylighting Systems Integrated Daylighting Systems New and Underutilized Technology: Integrated Daylighting Systems October 4, 2013 - 4:56pm Addthis The following information outlines key deployment considerations for integrated daylighting systems within the Federal sector. Benefits Integrated daylighting systems can be combined with electronic dimmable fluorescent ballasts, photo sensors, and occupancy sensors where appropriate. Network components, workstation controls, and building management options can also be integrated to provide significant savings on applied systems. Application Integrated daylighting systems are applicable in perimeter and interior spaces with daylight exposure via windows and skylights. Key Factors for Deployment Acceptable levels of daylight are required and must be factored into

3

Advanced fenestration systems for improved daylight performance  

E-Print Network (OSTI)

daylighting designs is a lack of systems perspective that accounts for, and provides an integrated solution

Selkowitz, S.; Lee, E.S.

1998-01-01T23:59:59.000Z

4

Heliostat design for the daylighting system  

Science Journals Connector (OSTI)

The daylighting system is designed to guide sunlight into buildings for illumination. It has the best illumination performance when sunlight vertically impinges on the collector of the...

Chang, Chih-Hung; Hsiso, Horng-Ching; Chang, Cheng-Ming; Wang, Chen-You; Lin, Tzung-Han; Chen, Yi-Yung; Lai, Yi-Lung; Yen, Cho-Jung; Chen, Kuan-Yu; Whang, Allen Jong-Woei

2014-01-01T23:59:59.000Z

5

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

6

Shades and Shade Controls : Daylighting The New York Times Building  

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

Shades and Shade Controls Shades and Shade Controls Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team Shades and Shade Controls The shades and shade controls scope of work is based upon the philosophy that occupants of commercial office buildings prefer natural light to electric light. The shade system goals for The New York Times Building are: Maximize natural light Maximize occupant connectivity with the outdoors, i.e. external views Intercept sunlight penetration so as to avoid direct solar radiation on the occupants

7

AEDG Implementation Recommendations: Daylighting Controls | Building Energy  

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

Controls Controls The Advanced Energy Design Guide (AEDG) for Small Office Buildings, 30% series, seeks to achieve 30% savings over ASHRAE Standard 90.1-1999. This guide focuses on improvements to small office buildings, less than 20,000ft2. The recommendations in this article are adapted from the implementation section of the guide and focus on expanded recommendations for daylighting controls; photo sensor placement; calibration and commissioning; daylight levels. Publication Date: Wednesday, May 13, 2009 air_daylighting_controls.pdf Document Details Affiliation: DOE BECP Focus: Compliance Building Type: Commercial Code Referenced: ASHRAE Standard 90.1-1999 Document type: AEDG Implementation Recommendations Target Audience: Architect/Designer Builder Contractor Engineer

8

Lighting Controls : Daylighting The New York Times Building  

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

Lighting Controls Lighting Controls Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team Lighting Controls The lighting controls scope of work is based upon the philosophy that occupants of commercial office buildings prefer natural light to electric light. The lighting controls system specified by the Times Company for its new headquarters building is a DALI (Digital Addressable Lighting Interface) based system with dimmable fixtures throughout the interior space. This allows the system to dim down the electric lighting in response to daylight admittance. It also provides for variable target set points for illuminance levels at the work plane. The Times Company intends to establish and adjust target set points on a departmental basis. The lighting control sequences are described within the specification 16575. These sequences utilize occupancy sensors, photo sensors, switches and a time clock to control the lighting in the interior space on each floor. The emergency lighting system is also described within the specification. The lighting control sequences are tied to Control Intent Diagrams that divide up the space on each floor into its various control zones. The overall intent is to provide electric light only when the space is occupied and to provide as little electric light as is necessary to achieve the target set point for the work plane in a given department. A department usually occupies multiple floors.

9

Advanced Facades, Daylighting, and Complex Fenestration Systems  

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

Facades, Daylighting, and Facades, Daylighting, and Complex Fenestration Systems Eleanor Lee Lawrence Berkeley National Laboratory eslee@lbl.gov 510-486-4997 April 5, 2013 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: In order to reach BTO's aggressive 50% energy savings goal by 2030, innovative façade systems must minimize both lighting and HVAC energy end use consumption more optimally while addressing occupant comfort and amenity requirements.

10

Capturing the Daylight Dividend  

SciTech Connect

Capturing the Daylight Dividend conducted activities to build market demand for daylight as a means of improving indoor environmental quality, overcoming technological barriers to effective daylighting, and informing and assisting state and regional market transformation and resource acquisition program implementation efforts. The program clarified the benefits of daylight by examining whole building systems energy interactions between windows, lighting, heating, and air conditioning in daylit buildings, and daylighting's effect on the human circadian system and productivity. The project undertook work to advance photosensors, dimming systems, and ballasts, and provided technical training in specifying and operating daylighting controls in buildings. Future daylighting work is recommended in metric development, technology development, testing, training, education, and outreach.

Peter Boyce; Claudia Hunter; Owen Howlett

2006-04-30T23:59:59.000Z

11

Roof aperture system for selective collection and control of solar energy for building heating, cooling and daylighting  

DOE Patents (OSTI)

The amount of building heating, cooling and daylighting is controlled by at least one pair of solar energy passing panels, with each panel of the pair of panels being exposed to a separate direction of sun incidence. A shutter-shade combination is associated with each pair of panels and the shutter is connected to the shade so that rectilinear movement of the shutter causes pivotal movement of the shade.

Sanders, William J. (Kansas City, KS); Snyder, Marvin K. (Overland Park, KS); Harter, James W. (Independence, MO)

1983-01-01T23:59:59.000Z

12

Daylighting performance of electrochromic glazing system  

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

52E 52E Lighting energy savings potential of split- pane electrochromic windows controlled for daylighting with visual comfort L.L. Fernandes Lawrence Berkeley National Laboratory E.S. Lee Lawrence Berkeley National Laboratory G. Ward Anyhere Software Windows and Envelope Materials Group Building Technology and Urban Systems Department Environmental Energy Technologies Division February 2013 Published in Energy and Buildings 61 (2013) 8-20 10.1016/j.enbuild.2012.10.057 ! DISCLAIMER This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the University of

13

Daylighting control performance of a thin-film ceramic electrochromic window: field study results  

E-Print Network (OSTI)

1 Daylighting control performance of a thin-film ceramic electrochromic window: field study results-film electrochromic (EC) windows were initiated at the new full-scale Window Systems testbed facility at the Lawrence of this emerging technology. Keywords: Building energy-efficiency; Electrochromic windows; Daylighting; Control

14

Dynamic daylight control system implementing thin cast arrays of polydimethylsiloxane-based millimeter-scale transparent louvers  

E-Print Network (OSTI)

with improved distribution of daylight throughout the interior space [21]. According to the US Energy of the total U.S. primary energy [7]. Furthermore, the U.S. Energy Information Ad- ministration's (USEIA has significant impact on the overall reduction of energy consumption. Daylight autonomy is a widely

Aizenberg, Joanna

15

Lighting energy savings potential of split-pane electrochromic windows controlled for daylighting with visual comfort  

E-Print Network (OSTI)

Energy Performance of Electrochromic Windows Controlled forenergy performance of electrochromic windows. Proceedingssignal for daylight (electrochromic window, no overhang).

Fernandes, Luis

2014-01-01T23:59:59.000Z

16

Automating the Selection of Fenestration Systems to Best Meet Daylighting  

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

Automating the Selection of Fenestration Systems to Best Meet Daylighting Automating the Selection of Fenestration Systems to Best Meet Daylighting Performance Goals Title Automating the Selection of Fenestration Systems to Best Meet Daylighting Performance Goals Publication Type Conference Paper LBNL Report Number LBNL-53003 Year of Publication 2003 Authors Fernandes, Luis L., and Konstantinos M. Papamichael Conference Name 2003 International Building Performance Simulation Association Conference Date Published 02/2003 Conference Location Eindhoven, Netherlands Call Number LBNL-53003 Abstract Traditional selection of fenestration systems follows a trial-and-error approach, i.e., iterative selection of fenestration systems and evaluation of their performance through the use of simulation tools and techniques. This paper is about the development of a new method, which inverts traditional practice, i.e., aims at automated selection of fenestration systems that best meet specific lighting performance goals. The new method is based on manipulation of matrices that represent the optical properties of fenestration systems, the propagation of light in interior spaces, and the outdoors luminous conditions. The method follows two steps: 1) the determination of the luminous flux distribution originating from the location of the fenestration that best meets the desired lighting performance goals and 2) the selection of the fenestration system that comes closer to producing the desired flux distribution from the outdoor daylight distribution.

17

Singapore's Zero-Energy Building's daylight monitoring system  

E-Print Network (OSTI)

Daylight Illuminance [12] (UGI) relates the illuminance onin three metrics for the UGI, defining exceeding (>2000lx),

Grobe, Lars

2010-01-01T23:59:59.000Z

18

Window Daylighting Demo  

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

Window Daylighting Demo: Window Daylighting Demo: Accelerated Deployment of Daylighting and Shading Systems Stephen Selkowitz Lawrence Berkeley National Laboratory seselkowitz@lbl.gov 510-486-5064 April 4, 2013 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: * Façade has large energy impacts. Cooling and lighting average ~ 40% of energy use in commercial buildings and often >50% in peak electric demand. * Many glazing/shading/daylighting options exist, but selecting the "best" solution is

19

Window Daylighting Demo  

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

Window Daylighting Demo: Window Daylighting Demo: Accelerated Deployment of Daylighting and Shading Systems Stephen Selkowitz Lawrence Berkeley National Laboratory seselkowitz@lbl.gov 510-486-5064 April 4, 2013 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: * Façade has large energy impacts. Cooling and lighting average ~ 40% of energy use in commercial buildings and often >50% in peak electric demand. * Many glazing/shading/daylighting options exist, but selecting the "best" solution is

20

Daylighting The New York Times Building  

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

Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team NEW: Post-occupancy Evaluation Publications Daylighting The New York Times Headquarters Building This website provides information on a collaboration between The New York Times Company, the Lawrence Berkeley National Laboratory, industry, and three major public funding agencies designed to transform the market for emerging automated window shade systems and daylighting controls so that these types of energy-efficient products become the norm. Project activities included documenting and demonstrating that the technology works and generates energy savings in real world applications, creating a market response so that these systems are available at commodity prices and are cost-effective, making third party performance data available to the public, and providing guidance to support widespread deployment.

Note: This page contains sample records for the topic "daylighting control 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

Overview : Daylighting The New York Times Building  

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

Overview Overview Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team Overview "Despite the growing interest in daylighting, "getting it right" remains a challenge. Elegant images in architectural magazines don't automatically translate into sustainable designs with proven comfort and energy performance. Controlling thermal heat loss and gain can be largely addressed with highly insulating glazing technologies on the market today. However, controlling solar gain and managing daylight, view, and glare is at a much earlier stage in terms of cost-effective, available solutions."

22

Publications : Daylighting The New York Times Building  

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

Publications Publications Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team Publications Technical Publications Post-occupancy Evaluation A post-occupancy monitored evaluation of the dimmable lighting, automated shading, and underfloor air distribution system in The New York Times Building. Eleanor S. Lee, Luis L. Fernandes, Brian Coffey, Andrew McNeil, Robert Clear, Tom Webster, Fred Bauman, Darryl Dickerhoff, David Heinzerling, Tyler Hoyt. LBNL Technical report, January 2013. LBNL-6023E.

23

Cooling Energy and Cost Savings with Daylighting  

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

Cooling Energy and Cost Savings with Daylighting Cooling Energy and Cost Savings with Daylighting Title Cooling Energy and Cost Savings with Daylighting Publication Type Conference Paper LBNL Report Number LBL-19734 Year of Publication 1985 Authors Arasteh, Dariush K., Russell Johnson, Stephen E. Selkowitz, and Deborah J. Connell Conference Name 2nd Annual Symposium on Improving Building Energy Efficiency in Hot and Humid Climates Date Published 09/1985 Conference Location Texas A&M University Call Number LBL-19734 Abstract Fenestration performance in nonresidentialsbuildings in hot climates is often a large coolingsload liability. Proper fenestration design andsthe use of daylight-responsive dimming controls onselectric lights can, in addition to drasticallysreducing lighting energy, lower cooling loads,speak electrical demand, operating costs, chillerssizes, and first costs. Using the building energyssimulation programs DOE-2.1B and DOE-2.1C , wesfirst discuss lighting energy savings from daylighting.sThe effects of fenestration parametersson cooling loads, total energy use, peak demand,schiller sizes, and initial and operating costs aresalso discussed. The impact of daylighting, asscompared to electric lighting, on cooling requirementssis discussed as a function of glazingscharacteristics, location, and shading systems.

24

Simulating the Daylight Performance of Complex Fenestration Systems Using Bidirectional Scattering Distribution Functions within Radiance  

SciTech Connect

We describe two methods which rely on bidirectional scattering distribution functions (BSDFs) to model the daylighting performance of complex fenestration systems (CFS), enabling greater flexibility and accuracy in evaluating arbitrary assemblies of glazing, shading, and other optically-complex coplanar window systems. Two tools within Radiance enable a) efficient annual performance evaluations of CFS, and b) accurate renderings of CFS despite the loss of spatial resolution associated with low-resolution BSDF datasets for inhomogeneous systems. Validation, accuracy, and limitations of the methods are discussed.

Ward, Gregory; Mistrick, Ph.D., Richard; Lee, Eleanor; McNeil, Andrew; Jonsson, Ph.D., Jacob

2011-01-21T23:59:59.000Z

25

Windows and Daylighting  

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

Office building exterior Office building exterior Windows and Daylighting Windows research is aimed at improving energy efficiency in buildings and homes across the nation. Research includes: New glazing materials Windows simulation software Advanced high-performance fenestration systems Daylighting technologies Measurement of window properties Windows performance in residential and commercial buildings. Contacts Stephen Selkowitz SESelkowitz@lbl.gov (510) 486-5064 Eleanor Lee ESLee@lbl.gov (510) 486-4997 Charlie Curcija DCCurcija@lbl.gov (510) 495-2602 Links Windows and Daylighting Daylighting the New York Times Headquarters Building Batteries and Fuel Cells Buildings Energy Efficiency Applications Commercial Buildings Cool Roofs and Heat Islands Demand Response Energy Efficiency Program and Market Trends

26

Project team : Daylighting The New York Times Building  

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

Project team Project team Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team Project team To contact the following individuals, please call the number listed or enable JavaScript within your browser's preferences. The New York Times Company Angelo Salvatore Executive Director of Building Operations Patrick Whelan Facilities Director Glenn Hughes Director of Construction/ Real Estate David Thurm Chief Information Officer Hussain Ali-Khan Vice President, Real Estate Development

27

International Symposium on Daylighting Buildings (IEA SHC TASK 31) Integrating Automated Shading and Smart Glazings with Daylight  

E-Print Network (OSTI)

technologies on the market today. The challenge of controlling solar gain and managing daylight, view and glare systems and in the other we explore the use of electrochromic glazings. Each study involves both

28

Automated roller shades : Daylighting The New York Times Building  

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

Automated roller shades Automated roller shades Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team Automated roller shades Automated roller shades manage daylight, solar heat gains, view, glare, privacy, and building appearance through changes in shade height. A roller shade consists of a fabric wrapped around a horizontal tube, which contains a tubular motor. The tubular motor rotates when ac- or dc- power is applied to it causing modulation in shade height. The control system can be designed to optimize numerous variables, the most common being control of direct sun. In this application, the shades were controlled to five preset heights that aligned with the architectural features of the façade - i.e., the vision portion of the window wall - so that direct sun penetrated no more than a specified distance from the window wall. The Times Company also requested that the shades control window glare, yet maximize the opportunity for view and daylight admission. Unnecessary up/down movement of the shade was to be minimized. Fabric choices (openness of the weave, color of the fabric facing toward the interior and exterior) were additional considerations in terms of appearance as well as visual comfort and daylighting benefits.

29

The architectural approach : Daylighting The New York Times Building  

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

architectural approach architectural approach Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team The architectural approach Proper architectural and interior design are key to successful realization of daylighting in buildings. The New York Times Building was designed by Renzo Piano, an internationally distinguished, Pritzker prize winning architect in association with Fox & Fowle, a leading high rise architectural firm based on New York City. In concert with Renzo Piano's design, the interiors were designed by Gensler, a leading interior design firm. Flack + Kurtz, Inc. provided MEP engineering. SBLD Studio, Inc. provided lighting design services.

30

Simulating the daylight performance of complex fenestration systems using bidirectional scattering distribution functions with  

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

414E 414E Simulating the Daylight Performance of Complex Fenestration Systems Using Bidirectional Scattering Distribution Functions within Radiance G. Ward, R. Mistrick, E.S. Lee, A. McNeil, J. Jonsson Environmental Energy Technologies Division Building Technologies Department January 2011 Published in Leukos, Journal of the Illuminating Engineering Society of North America 7(4). DISCLAIMER This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the University of California, nor any of their employees, makes any warranty, express or implied, or assumes any legal responsibility for the accuracy, completeness, or usefulness of any information,

31

Walking on daylight : the application of translucent floor systems as a means of achieving natural daylighting in mid and low rise architecture  

E-Print Network (OSTI)

This thesis is concerned with the introduction of quality daylight to buildings by means of translucency in the horizontal planes or floors within the building. Since people began to build, the concept of translucency in ...

Widder, James

1985-01-01T23:59:59.000Z

32

Daylighting | Open Energy Information  

Open Energy Info (EERE)

TODO: Add description List of Daylighting Incentives Retrieved from "http:en.openei.orgwindex.php?titleDaylighting&oldid267157" Category: Articles with outstanding TODO tasks...

33

THE DAYLIGHTING SOLUTION  

E-Print Network (OSTI)

1980, pp.l4-20 THE DAYLIGHTING SOLUTION Stephen SelkowitzEEB-W-80-19 W-74 THE DAYLIGHTING SOLUTION Stephen Selkowitz

Selkowitz, Stephen

2013-01-01T23:59:59.000Z

34

Solar Day-Lighting Using Optical Fibers  

Science Journals Connector (OSTI)

Green lighting alternatives can substantially reduce electricity consumption. Solar day-lighting system, by transporting the concentrated sunlight through optical fibers, has been...

Kumar, Naveen; Patil, Sanket

35

The New York Times Headquarters Daylighting Mockup: Monitored Performance  

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

The New York Times Headquarters Daylighting Mockup: Monitored Performance The New York Times Headquarters Daylighting Mockup: Monitored Performance of the Daylighting Control System Title The New York Times Headquarters Daylighting Mockup: Monitored Performance of the Daylighting Control System Publication Type Journal Article LBNL Report Number LBNL-56979 Year of Publication 2006 Authors Lee, Eleanor S., and Stephen E. Selkowitz Journal Energy & Buildings Volume 38 Pagination 914-929 Call Number LBNL-56979 Abstract A nine-month monitored field study of the performance of automated roller shades and daylighting controls was conducted in a 401 m2 unoccupied, furnished daylighting mockup. The mockup mimicked the southwest corner of a new 110 km2 commercial building in New York, New York, where The New York Times will be the major tenant. This paper focuses on evaluating the performance of two daylighting control systems installed in separate areas of an open plan office with 1.2-m high workstation partitions: 1) Area A had 0-10 V dimmable ballasts with an open-loop proportional control system and an automated shade controlled to reduce window glare and increase daylight, and 2) Area B had digital addressable lighting interface (DALI) ballasts with a closed-loop integral reset control system and an automated shade controlled to block direct sun. Daylighting control system performance and lighting energy use were monitored. The daylighting control systems demonstrated very reliable performance after they were commissioned properly. Work plane illuminance levels were maintained above 90% of the maximum fluorescent illuminance level for 99.9+/-0.5% and 97.9+/-6.1% of the day on average over the monitored period, respectively, in Areas A and B. Daily lighting energy use savings were significant in both Areas over the equinox-to-equinox period compared to a non-daylit reference case. At 3.35 m from the window, 30% average savings were achieved with a sidelit west-facing condition in Area A while 50-60% were achieved with a bilateral daylit south-facing condition in Area B. At 4.57-9.14 m from the window, 5-10% and 25-40% savings were achieved in Areas A and B, respectively. Average savings for the 7-m deep dimming zone were 20-23% and 52-59% for Areas A and B, respectively, depending on the lighting schedule. The large savings and good reliability can be attributed to the automatic management of the interior shades. The DALI-based system exhibited faulty behavior that remains unexplained, but operational errors are expected to be resolved as DALI products reach full maturity. The building owner received very competitive bids ($30-75 US/DALI ballast) and was able to justify use of the daylighting control system based on operational cost savings and increased amenity. Additional energy savings due to reduced solar and lighting heat gains were not quantified but will add to the total operational cost savings.

36

The New York Times headquarters daylighting mockup: Monitored performance of the daylighting control system  

E-Print Network (OSTI)

is to instead achieve net zero energy buildings (ZEB) bysystems to achieve net zero energy use. Switchable windows,

Lee, Eleanor S.; Selkowitz, Stephen E.

2006-01-01T23:59:59.000Z

37

The New York Times headquarters daylighting mockup: Monitored performance of the daylighting control system  

E-Print Network (OSTI)

with LBNL sensors to monitor outdoor solar conditions,RTD temperature sensor (0.39C) shielded from direct solar

Lee, Eleanor S.; Selkowitz, Stephen E.

2006-01-01T23:59:59.000Z

38

Energy 101: Daylighting | Department of Energy  

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

Energy 101: Daylighting Energy 101: Daylighting Energy 101: Daylighting May 31, 2011 - 6:10pm Addthis Liisa O'Neill Liisa O'Neill Former New Media Specialist, Office of Public Affairs What does this mean for me? Daylighting maximizes the benefits of natural lighting and temperature regulation -- reducing lighting, heating and cooling costs for homeowners and businesses. Daylighting takes a simple concept to a new money-saving level in this edition of Energy 101. Through strategic placement of windows and skylights, daylighting maximizes the benefits of natural lighting and temperature regulation -- reducing lighting, heating and cooling costs for homeowners and businesses. This home energy efficiency strategy takes into account everything from the type of window to placement and interior design to help control how the

39

Energy 101: Daylighting | Department of Energy  

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

Energy 101: Daylighting Energy 101: Daylighting Energy 101: Daylighting May 31, 2011 - 6:10pm Addthis Liisa O'Neill Liisa O'Neill Former New Media Specialist, Office of Public Affairs What does this mean for me? Daylighting maximizes the benefits of natural lighting and temperature regulation -- reducing lighting, heating and cooling costs for homeowners and businesses. Daylighting takes a simple concept to a new money-saving level in this edition of Energy 101. Through strategic placement of windows and skylights, daylighting maximizes the benefits of natural lighting and temperature regulation -- reducing lighting, heating and cooling costs for homeowners and businesses. This home energy efficiency strategy takes into account everything from the type of window to placement and interior design to help control how the

40

Energy 101: Daylighting | Department of Energy  

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

Energy 101: Daylighting Energy 101: Daylighting Energy 101: Daylighting May 31, 2011 - 6:10pm Addthis Liisa O'Neill Liisa O'Neill Former New Media Specialist, Office of Public Affairs What does this mean for me? Daylighting maximizes the benefits of natural lighting and temperature regulation -- reducing lighting, heating and cooling costs for homeowners and businesses. Daylighting takes a simple concept to a new money-saving level in this edition of Energy 101. Through strategic placement of windows and skylights, daylighting maximizes the benefits of natural lighting and temperature regulation -- reducing lighting, heating and cooling costs for homeowners and businesses. This home energy efficiency strategy takes into account everything from the type of window to placement and interior design to help control how the

Note: This page contains sample records for the topic "daylighting control 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

Evaluating post-occupancy performance : Daylighting The New York Times  

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

Evaluating post-occupancy performance Evaluating post-occupancy performance Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team Evaluating post-occupancy performance "We aggressively pursued innovative designs to improve the quality of the workplace for our employees and to reduce energy use and other operating costs of our facility. The outcomes of this study confirm that we were successful. More importantly, our hope is that the energy efficient measures and designs documented in this independent study may inspire other companies' workplace designs." - Angelo Salvatore, Executive Director of Building Operations, The Times Company.

42

Daylighting | Department of Energy  

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

Daylighting Daylighting Daylighting July 29, 2012 - 5:58pm Addthis Daylighting is the use of windows and skylights to bring sunlight into your home. | Photo courtesy of Heather Lammers, NREL. Daylighting is the use of windows and skylights to bring sunlight into your home. | Photo courtesy of Heather Lammers, NREL. TIPS: See our tips for energy-efficient windows. Daylighting is the use of windows and skylights to bring sunlight into your home. Today's highly energy-efficient windows, as well as advances in lighting design, reduce the need for artificial lighting during daylight hours without causing heating or cooling problems. The best way to incorporate daylighting in your home depends on your climate and home's design. The sizes and locations of windows should be based on the cardinal directions rather than their effect on the

43

Commissioning/ verification : Daylighting The New York Times Building  

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

Commissioning/ verification Commissioning/ verification Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team Commissioning/ verification The construction cycle of the building life cycle is the time when the design intent is translated into a physical reality. Given novel integrated systems with which contractors (vendors, installers, commissioning (Cx) agents, etc.) do not have much experience, there is a risk that carefully laid plans will go amiss. To insure that the automated shading and daylighting control systems were installed and operating as intended, the manufacturers, LBNL, and the Times Company developed procedures to commission and verify system performance. With verification data resulting from these procedures, the Times Company possessed the unique capability to measure and compare performance to design intent then discuss and tune system performance with the manufacturer prior to closure of the work scope and occupancy of the building.

44

daylight | OpenEI Community  

Open Energy Info (EERE)

daylight daylight Home Dc's picture Submitted by Dc(15) Member 15 November, 2013 - 13:26 Living Walls ancient building system architect biomimicry building technology cooling cu daylight design problem energy use engineer fred andreas geothermal green building heat transfer heating living walls metabolic adjustment net zero pre-electricity Renewable Energy Solar university of colorado utility grid Wind Much of the discussion surrounding green buildings centers around reducing energy use. The term net zero is the platinum standard for green buildings, meaning the building in question does not take any more energy from the utility grid than it produces using renewable energy resources, such as solar, wind, or geothermal installations (and sometimes these renewable energy resources actually feed energy back to the utility grid).

45

Light and Energy -Daylight measurements  

E-Print Network (OSTI)

Light and Energy - Daylight measurements #12;Light and Energy - Daylight measurements Authors: Jens;3 Title Light and Energy Subtitle Daylight measurements Authors Jens Christoffersen, Ásta Logadóttir ............................................................................... 7 Measurement results: Kyosemi.................................................................. 9

46

Energy 101: Daylighting  

ScienceCinema (OSTI)

Daylighting?the use of windows or skylights for natural lighting and temperature regulation?is one building strategy that can save money for homeowners and businesses. Highly efficient, strategically placed windows maximize the use of natural daylight in a building, lowering the need for artificial lighting without causing heating or cooling problems.

None

2013-05-29T23:59:59.000Z

47

Madrid Daylighting Report  

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

REPORTS - Daylighting Quality Page REPORTS - Daylighting Quality Page 1 of 2 DAYLIGHTING QUALITY 1) NATURAL LIGHTING The main criteria for interior design is leading the user from darkness toward daylight. For this reason, the main source of daylighting is the south wall. Moreover, a whole part of the house may be unfolded, letting an internal open courtyard provide a touch of natural environment into the house. Small fixed windows with steel sash and frames are also strategically located to allow the user to get a beam of the morning or sunset light -even though such orientations are inconvenient from a bioclimatic point of view-, as well as to see the outside while working or having lunch. In most cases, glass is covered with shutters and stainless steel frames fitting woven wire

48

Cornell University Daylighting Report  

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

Daylighting Quality Daylighting Quality With a small building footprint and a relatively large vertical surface area, the CUSD house has the unique opportunity to supply almost all of its lighting with daylight. Keeping this in mind, we have created two large apertures, one on the south side of the building and one on the north side of the building. The southern aperture is a tri-fold glass door, opening to the living room on the west side of the house. This fenestration provides ambient light and some heat to the space during the day. Occupants can take advantage of this daylight as they go to and return from work, prepare meals, and relax in the living area. Concrete pavers (thermal mass) are placed inside and outside of the southern aperture, bridging the threshold between interior and exterior spaces. The

49

Daylighting Basics | Department of Energy  

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

Daylighting Basics Daylighting Basics Daylighting Basics August 16, 2013 - 11:24am Addthis Energy 101: Daylighting Basics This video explains how homeowners and businesses can use highly efficient, strategically placed windows to save money. Text Version Daylighting is the use of windows and skylights to bring sunlight into buildings. Daylighting in businesses and commercial buildings can result in substantial savings on electric bills, and not only provides a higher quality of light but also improves productivity and health. Daylighting in schools has even improved student grades and attendance. Today's highly energy-efficient windows, as well as advances in lighting design, allow efficient use of windows to reduce the need for artificial lighting during daylight hours without causing heating or cooling problems.

50

Optimization of building window system in Asian regions by analyzing solar heat gain and daylighting elements  

Science Journals Connector (OSTI)

This paper presents and optimizes the annual heating, cooling and lighting energy consumption associated with applying different types and properties of window systems in a building envelope. Through using building simulation modeling, various window properties such as U-value, solar heat gain coefficient (SHGC), and visible transmittance (Tvis) are evaluated with different window wall ratios (WWRs) and orientations in five typical Asian climates: Manila, Taipei, Shanghai, Seoul and Sapporo. By means of a regression analysis, simple charts for the relationship between window properties and building energy performance are presented as a function of U-value, SHGC, Tvis, WWR, solar aperture, effective aperture, and orientation. As a design guideline in selecting energy saving windows, an optimized window system for each climate is plotted in detailed charts and tables.

J.W. Lee; H.J. Jung; J.Y. Park; J.B. Lee; Y. Yoon

2013-01-01T23:59:59.000Z

51

Definition: Daylighting | Open Energy Information  

Open Energy Info (EERE)

Daylighting Daylighting Jump to: navigation, search Dictionary.png Daylighting The use of natural sunlight to provide interior lighting for a building.[1] View on Wikipedia Wikipedia Definition Daylighting is the practice of placing windows or other openings and reflective surfaces so that during the day natural light provides effective internal lighting. Particular attention is given to daylighting while designing a building when the aim is to maximize visual comfort or to reduce energy use. Energy savings can be achieved either from the reduced use of artificial (electric) lighting or from passive solar heating or cooling. Artificial lighting energy use can be reduced by simply installing fewer electric lights because daylight is present, or by dimming/switching electric lights automatically in response to the presence of daylight, a

52

Tips for Daylighting - Browse  

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

Tips for Daylighting with Windows Tips for Daylighting with Windows These guidelines provide an integrated approach to the cost-effective design of perimeter zones in new commercial buildings. They function as a quick reference for designers through a set of easy steps and rules-of-thumb, emphasizing "how-to" practical details. References are given to more detailed sources of information, should the reader wish to go further. No guidelines can answer all possible questions from all types of users. However, this document addresses the most commonly occurring scenarios. The guidance here is limited by the medium; short paper documents can only go so far in assisting a designer with a unique project. This document has been carefully shaped to best meet the needs of a designer when time does not permit a more extensive form of assistance.

53

Lighting and Daylighting Products and Services | Department of Energy  

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

Lighting and Daylighting Products and Services Lighting and Daylighting Products and Services Lighting and Daylighting Products and Services July 29, 2012 - 5:06pm Addthis Lighting and Daylighting Products and Services Use the following links to get product information and locate professional services for lighting and daylighting. Product Information Advanced Lighting Package ENERGY STAR® Information on the ENERGY STAR Advanced Lighting Project, which allows homeowners to upgrade their light fixtures to more energy efficient products. Energy-efficient Lights ENERGY STAR® Information on the benefits of ENERGY STAR qualified light bulbs. Fixtures Guide ENERGY STAR® Examples and pictures of ENERGY STAR qualified light fixtures. How to Select Residential LED Under-cabinet Lighting (PDF) Alliance for Solid-State Illumination Systems and Technologies

54

Lighting and Daylighting Products and Services | Department of Energy  

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

Lighting and Daylighting Products and Services Lighting and Daylighting Products and Services Lighting and Daylighting Products and Services July 29, 2012 - 5:06pm Addthis Lighting and Daylighting Products and Services Use the following links to get product information and locate professional services for lighting and daylighting. Product Information Advanced Lighting Package ENERGY STAR® Information on the ENERGY STAR Advanced Lighting Project, which allows homeowners to upgrade their light fixtures to more energy efficient products. Energy-efficient Lights ENERGY STAR® Information on the benefits of ENERGY STAR qualified light bulbs. Fixtures Guide ENERGY STAR® Examples and pictures of ENERGY STAR qualified light fixtures. How to Select Residential LED Under-cabinet Lighting (PDF) Alliance for Solid-State Illumination Systems and Technologies

55

Nanolens Window Coatings for Daylighting  

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

Nanolens Window Coatings for Nanolens Window Coatings for Daylighting Kyle J. Alvine Pacific Northwest National Laboratory Kyle.alvine@pnnl.gov / (509) - 372 - 4475 April 4 th , 2013 Demonstration of the effect To develop a novel, low-cost window coating to double daylight penetration to offset lighting energy use 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: PNNL is developing a novel, low-cost window coating to redirect daylight deeper into buildings to significantly offset lighting energy.

56

Nanolens Window Coatings for Daylighting  

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

Nanolens Window Coatings for Nanolens Window Coatings for Daylighting Kyle J. Alvine Pacific Northwest National Laboratory Kyle.alvine@pnnl.gov / (509) - 372 - 4475 April 4 th , 2013 Demonstration of the effect To develop a novel, low-cost window coating to double daylight penetration to offset lighting energy use 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: PNNL is developing a novel, low-cost window coating to redirect daylight deeper into buildings to significantly offset lighting energy.

57

Design and Evaluation of Daylighting Applications of Holographic Glazings  

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

Design and Evaluation of Daylighting Applications of Holographic Glazings Design and Evaluation of Daylighting Applications of Holographic Glazings Title Design and Evaluation of Daylighting Applications of Holographic Glazings Publication Type Report LBNL Report Number LBNL-44167 Year of Publication 1996 Authors Papamichael, Konstantinos M., Charles K. Ehrlich, and Gregory J. Ward Call Number LBNL-44167 Abstract When combined with appropriate electric lighting dimming controls, the use of daylight for ambient and task illumination can significantly reduce energy requirements in commercial buildings. While skylights can effectively illuminate any part of one-story buildings, conventional side windows can illuminate only a 15 ft - 20 ft (4.6 m - 6.1 m) depth of the building perimeter. Even so, the overall efficacy of daylight is limited, because side windows produce uneven distributions of daylight. Achieving adequate illumination at distances further away from the window results in excessive illumination near the window, which increases cooling loads from the associated solar heat gain. As a result, the use of larger apertures and/or higher transmittance glazings, to introduce daylight deeper than 15 ft - 20 ft (4.6 m - 6.1 m), may prove ineffective with respect to saving energy, because cooling load penalties may exceed the electric lighting savings.

58

Evaluating daylighting potential and energy efficiency in a classroom building  

Science Journals Connector (OSTI)

In this paper we analyze the possibility of using daylight as the main source of light for learning and teaching activities in a classroom building of the Universidade Tecnolgica Federal do Paran in Curitiba Brazil. Beginning with a survey on light bulb and luminaire types used in the building and on the potential of daylighting in such environments six different classroom types with different solar orientations were selected for analysis. The research methods included the estimation of daylighting potential from obtained daylight coefficients (DCs) for periods of the year and sky conditions other than those of the onsite measurements; the evaluation of conformity of the lighting system to the Brazilian RTQ Code (Regulamento Tcnico de Qualidade) an energy consumption rating system aimed at reducing electric energy consumption in office buildings; the estimation of electric energy demand for a combined use of daylighting and lighting system; the proposal of an efficient lighting system; and cost assessment using payback analysis. Results suggest energy savings of up to 94% when integrating daylight with the artificial lighting system a payback within the range of 2260 months for a complete substitution of the existing lighting system for a more efficient one.

E. L. Krger; S. D. Fonseca

2011-01-01T23:59:59.000Z

59

Using Daylight to Light the Access Zone of Road Tunnels  

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

Using Daylight to Light the Access Zone of Road Tunnels Using Daylight to Light the Access Zone of Road Tunnels Speaker(s): Eliyahu Ne'eman Date: March 4, 2003 - 12:00pm Location: Bldg. 90 Lighting guides for roadway tunnels specify relatively high luminances for the "access zone" into the tunnel. They are needed to allow the eyes of the driver sufficient time to adapt during the short period of the transition from the outdoor natural daylight levels to the fairly low luminances along the main length of the tunnel. Usually, the necessary high luminances are provided by rows of costly luminaries which consume a lot of electricity during peak use periods and need a good deal of maintenance. To save some electric power, controls are used to dim the lighting on cloudy hours. Daylight has been used for the access zone in several tunnels around the

60

A New Digital Lighting Control System  

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

A New Digital Lighting Control System A New Digital Lighting Control System Speaker(s): Charles Knuffke Date: June 29, 2010 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Francis Rubinstein When various Lighting Controls components are discussed, they're usually slotted into separate "silos" - Occupancy Sensors, Relay Panels, Dimming Controls, and Daylighting Controls. Trying to combine two or more of these into a single system usually requires a fair amount of technical expertise and often help from different manufacturers. Combine that with the need under LEED to get these systems commissioned, often without detailed sequence of operation information, and that helps to explains why many view Lighting Controls as overly complex. And try to integrate the Lighting Controls into a larger overall building management system so their

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61

Advanced Optical Materials for Daylighting in Office Buildings  

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

Advanced Optical Materials for Daylighting in Office Buildings Advanced Optical Materials for Daylighting in Office Buildings Title Advanced Optical Materials for Daylighting in Office Buildings Publication Type Conference Paper LBNL Report Number LBL-20080 Year of Publication 1985 Authors Johnson, Russell, Deborah J. Connell, Stephen E. Selkowitz, and Dariush K. Arasteh Conference Name 10th Passive Solar Conference Date Published 10/1985 Conference Location Raleigh, NC Call Number LBL-20080 Abstract The use of daylighting to supplant electric light in office buildings offers substantial energy savings and peak electrical demand reductions. The benefits from electric lighting reductions can, however, be easily offset by increased cooling loads if solar gains are not controlled.sThe use of advanced glazing materials having optical switching propertiesscan facilitate solar control and, with proper design, maximize energy and cost benefits. The potential net annual performance of these materials, based on simulation studies using DOE-2.1C, are discussed insthis paper. Actively and passively controlled response functions aresanalyzed for the cooling-load-dominated climate of Lake Charles. The effects of advanced materials on net annual energy consumption, peak electrical demand, and chiller size are compared with those of conventional materials. The results demonstrate the importance of operable solar control to achieve energy-effective daylighting design. Advanced optical materials that provide the necessary level of control are shown to minimize peak electrical demand and electricity consumption.

62

Tips for Daylighting with Windows  

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

These guidelines provide an integrated approach to the cost-effective design of perimeter zones in new commercial buildings. They function as a quick reference for designers through a set of easy steps and rules-of-thumb, emphasizing "how-to" practical details. These guidelines provide an integrated approach to the cost-effective design of perimeter zones in new commercial buildings. They function as a quick reference for designers through a set of easy steps and rules-of-thumb, emphasizing "how-to" practical details. This research was funded by the California Institute for Energy Efficiency (CIEE), a research unit of the University of California. Additional related support was provided by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Building Technology, State and Community Programs, Office of Building Systems of the U.S. Department of Energy under Contract No. DE-AC03-76SF00098. Browse the document online Download the document in PDF form To obtain information about (1) this project, (2) updates to this document, or (3) future daylighting tools - or to submit comments about this site - contact Eleanor Lee at eslee@lbl.gov.

63

Annual daylighting performance of a passive optical light shelf in sidelit  

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

Annual daylighting performance of a passive optical light shelf in sidelit Annual daylighting performance of a passive optical light shelf in sidelit perimeter zones of commercial buildings Title Annual daylighting performance of a passive optical light shelf in sidelit perimeter zones of commercial buildings Publication Type Report Year of Publication 2013 Authors McNeil, Andrew, and Eleanor S. Lee Keywords bidirectional scattering distribution functions, building energy efficiency, daylighting, Radiance simulations Abstract Sunlight redirecting systems have the potential to significantly offset electric lighting energy use in deep perimeter zones of buildings where the windows are subject to high daylight availability. New Radiance modeling tools have recently been developed and validated, enabling accurate and timely simulation analysis of the annual energy and comfort performance of these optically-complex, anisotropic systems. A parametric study was conducted using these tools to evaluate the performance of a commercially-available passive optical light shelf (OLS) in a 17.4 m deep (57 ft), south-facing open plan office zone in three climates. Daylighting efficiency, discomfort glare, and lighting energy savings with continuous dimming and bi-level switching controls were determined at varying depths within the zone. The OLS decreased lighting energy use significantly throughout the depth of the space and achieved these savings with minimal discomfort glare in the area near the window. Annual lighting energy use intensity was reduced to 1.71-1.82 kWh/ft2-yr (22-27%) over the full depth of the perimeter zone across the three climates modeled (Phoenix, Washington DC, and Minneapolis) compared to a non-daylit zone at 2.34 kWh/ft2-yr. There was a greater occurrence of discomfort glare (3-7% during daytime work hours) if the occupant was in a seated view position looking at the window from the back of the room. The system is passive, needing no adjustment during the day and over the seasons and can be used as a retrofit measure in existing buildings. These results are encouraging and demonstrate how the primary daylit sidelit area can be extended well beyond the defined limits provided by the newly adopted ASHRAE 90.1-2010 code (i.e., 1.0 times the head height of the window).

64

Daylighting Requirements in the National Building Energy Codes Theyre Here!  

SciTech Connect

Requirements for the control of electric lighting in daylighted areas have historically been avoided in the national building energy codes. This is potentially a rich source of energy savings but as most lighting designers and architects know, daylighting design is not simple! The sheer complication of daylighting design makes crafting daylighting control requirements that could be applied generically in a national energy code a difficult task. However, that is currently changing. The Department of Energys (DOE) Building Energy Codes Program (BECP) managed by Pacific Northwest National Laboratory (PNNL) has been supporting the ANSI/ASHRAE/IESNA 90.1 committee in developing improvements to the 90.1 Standard. With subcontract support, the 90.1 Lighting Subcommittee has championed the incorporation of daylighting design and control requirements for the upcoming 2010 version of the nationally available ANSI/ASHRAE/IESNA Standard 90.1 for commercial building energy use.

Richman, Eric E.

2008-06-30T23:59:59.000Z

65

Daylighting directory 6/1980  

SciTech Connect

A renewed interest in the energy conservation potential of daylighting has generated new research, applications and demonstration activities over the last few years. It is apparent that even those people actively working in the field are frequently not aware of all of the ongoing projects and activities. At the same time, the total national effort to utilize daylighting effectively in buildings on a broad scale is still very small, thus making it important that current activities are crossfertilized. The intent of this directory is to provide current listings of individuals and organizations that are actively engaged in daylighting work and related publications and upcoming events of interest. This directory was compiled from information contained in the survey response forms which were filled out and returned to us over the last few months. Responsibility for the accuracy and completeness of each survey form lies entirely with the respondents. The directory is composed of five parts: (1) Participant Survey Response: contains the survey response forms as submitted to us, listed alphabetically by responding organization; (2) Activity Index: lists individual respondents alphabetically, showing the daylighting activities each has checked. Allows the reader to quickly identify the individuals working in a specific area. Once an individual is identified, turn to the Individual Index to find the page numbers where that individual may be located in other areas of the directory; (3) Individual Index: lists individual respondents alphabetically; (4) Daylighting publications: lists the publications by each respondent (authors listed alphabetically); and (5) Notes of Interest: contains a variety of information on meetings, conferences, new projects and publications, etc. This material was collected from a variety of sources in addition to the survey respondents.

Not Available

1980-06-01T23:59:59.000Z

66

Energy 101: Daylighting | Department of Energy  

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

Daylighting Daylighting Energy 101: Daylighting Addthis Below is the text version for the Energy 101: Daylighting video. The video opens with "Energy 101: Daylighting." This is followed by various shots of building interiors with many windows and large amounts of natural lighting. Okay, so we all know that windows can provide a great view, right? But if they're placed in the right locations, they can also save you money on your utility bill...and they can help keep you more comfortable at home or work. A montage of building interiors and exteriors appears onscreen, with windows filling the interior spaces with natural light. It's called daylighting, and it takes a simple concept to a new level. Daylighting combines lots of things-everything from the type of window,

67

Daylighter Daily Solar Roof Light | Open Energy Information  

Open Energy Info (EERE)

Daylighter Daily Solar Roof Light Daylighter Daily Solar Roof Light Jump to: navigation, search Name Daylighter Daily Solar Roof Light Address 1991 Crocker Road, Suite 600 Place Cleveland, Ohio Zip 44145 Sector Solar Product Installation; Manufacturing Phone number 440-892-3312 Website http://www.SolarLightisFree.co Coordinates 41.4648875°, -81.9506519° 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":41.4648875,"lon":-81.9506519,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

68

List of Daylighting Incentives | Open Energy Information  

Open Energy Info (EERE)

Daylighting Incentives Daylighting Incentives Jump to: navigation, search The following contains the list of 166 Daylighting Incentives. CSV (rows 1 - 166) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active APS - Renewable Energy Incentive Program (Arizona) Utility Rebate Program Arizona Commercial Residential Anaerobic Digestion Biomass Daylighting Geothermal Electric Ground Source Heat Pumps Landfill Gas Other Distributed Generation Technologies Photovoltaics Small Hydroelectric Solar Pool Heating Solar Space Heat Solar Thermal Process Heat Solar Water Heat Wind energy Yes Alternative and Clean Energy State Grant Program (Pennsylvania) State Grant Program Pennsylvania Commercial Industrial Local Government Multi-Family Residential Nonprofit Schools Boilers

69

Cooling Energy and Cost Savings with Daylighting in a Hot and Humid Climate  

E-Print Network (OSTI)

Fenestration performance in nonresidential buildings in hot climates is often a large cooling load liability. Proper fenestration design and the use of daylight-responsive dimming controls on electric lights can, in addition to drastically reducing...

Arasteh, D.; Johnson, R.; Selkowitz, S.; Connell, D.

1985-01-01T23:59:59.000Z

70

Energy 101: Daylighting | Department of Energy  

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

Daylighting Daylighting Energy 101: Daylighting Addthis Description Daylighting-the use of windows or skylights for natural lighting and temperature regulation-is one building strategy that can save money for homeowners and businesses. Highly efficient, strategically placed windows maximize the use of natural daylight in a building, lowering the need for artificial lighting without causing heating or cooling problems. Duration 2:44 Topic Energy Efficiency Heating & Cooling Home Weatherization Home Energy Audits Construction Commercial Lighting Credit Energy Department Video ANNOUNCER: OK, so we all know that windows can provide a great view, right? But if they're placed in the right locations, they can also save you money on your utility bill, and they can help keep you more comfortable

71

Effect of daylighting on energy consumption and daylight quality in an existing elementary school  

E-Print Network (OSTI)

created for the base case and all proposed daylighting designs for building energy performance evaluation using the DOE-2 building energy simulation program. Daylight factors from the actual spaces, physical model measurements, and computer simulation... outputs were studied for trends iv in interior daylight illuminance levels. Annual energy consumption analyses were performed using DOE-2 and involved heating, cooling, and electrical energy use comparisons of all proposed designs with the base case...

Atre, Umesh Vinayak

2005-08-29T23:59:59.000Z

72

Thermodynamics of daylight-pumped lasers  

Science Journals Connector (OSTI)

We cast the problem of very-low-threshold, daylight-pumped lasers in a general thermodynamic framework. We calculate that the requirements to reach threshold are that the Stokes shift...

Roxlo, C B; Yablonovitch, Eli

1983-01-01T23:59:59.000Z

73

Empirical assessment of a prismatic daylight-redirecting window film in a  

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

Empirical assessment of a prismatic daylight-redirecting window film in a Empirical assessment of a prismatic daylight-redirecting window film in a full-scale office testbed Title Empirical assessment of a prismatic daylight-redirecting window film in a full-scale office testbed Publication Type Conference Paper LBNL Report Number LBNL-6496E Year of Publication 2013 Authors Thanachareonkit, Anothai, Eleanor S. Lee, and Andrew McNeil Conference Name Illuminating Engineering Society (IES) Annual Conference 2013 Date Published 10/2013 Conference Location Huntington Beach, California Keywords building energy efficiency., daylighting, microstructure film, prismatic film, windows Abstract Daylight redirecting systems with vertical windows have the potential to offset lighting energy use in deep perimeter zones. Microstructured prismatic window films can be manufactured using low-cost, roll-to-roll fabrication methods and adhered to the inside surface of existing windows as a retrofit measure or installed as a replacement insulating glass unit in the clerestory portion of the window wall. A clear film patterned with linear, 50-250 micrometer high, four-sided asymmetrical prisms was fabricated and installed in the south-facing, clerestory low-e, clear glazed windows of a full-scale testbed facility. Views through the film were distorted. The film was evaluated in a sunny climate over a two-year period to gauge daylighting and visual comfort performance. The daylighting aperture was small (window-to-wall ratio of 0.18) and the lower windows were blocked off to isolate the evaluation to the window film. Workplane illuminance measurements were made in the 4.6 m (15 ft) deep room furnished as a private office. Analysis of discomfort glare was conducted using high dynamic range imaging coupled with the evalglare software tool, which computes the daylight glare= probability and other metrics used to evaluate visual discomfort.

74

Lighting Group: Controls: IBECS  

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IBECS IBECS Integrated Building Environmental Communications System Objective The overall technical goal of the IBECS project is to develop an integrated building equipment communications network that will allow appropriate automation of lighting and envelope systems to increase energy efficiency, improve building performance, and enhance occupant experience in the space. This network will provide a low-cost means for occupants to control local lighting and window systems, thereby improving occupant comfort, satisfaction and performance. A related goal is to improve existing lighting control components and accelerate development of new daylighting technologies that will allow daylighting to be more extensively applied to a larger proportion of building floor space.

75

Thermal Control & System Integration  

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

The thermal control and system integration activity focuses on issues such as the integration of motor and power control technologies and the development of advanced thermal control technologies....

76

To be submitted to Solar Energy. Daylight performance of a microstructured prismatic window film in deep open  

E-Print Network (OSTI)

To be submitted to Solar Energy. Daylight performance of a microstructured prismatic window film Systems Department, Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory with vertical windows have the potential to offset lighting energy use in deep perimeter zones

77

Does Daylight Savings Time Affect Traffic Accidents?  

E-Print Network (OSTI)

This paper studies the effect of changes in accident pattern due to Daylight Savings Time (DST). The extension of the DST in 2007 provides a natural experiment to determine whether the number of traffic accidents is affected by shifts in hours...

Deen, Sophia 1988-

2012-04-20T23:59:59.000Z

78

Control system design method  

DOE Patents (OSTI)

A control system design method and concomitant control system comprising representing a physical apparatus to be controlled as a Hamiltonian system, determining elements of the Hamiltonian system representation which are power generators, power dissipators, and power storage devices, analyzing stability and performance of the Hamiltonian system based on the results of the determining step and determining necessary and sufficient conditions for stability of the Hamiltonian system, creating a stable control system based on the results of the analyzing step, and employing the resulting control system to control the physical apparatus.

Wilson, David G. (Tijeras, NM); Robinett, III, Rush D. (Tijeras, NM)

2012-02-21T23:59:59.000Z

79

Acceleration of the matrix multiplication of Radiance three phase daylighting simulations with parallel computing on heterogeneous hardware of personal computer  

SciTech Connect

Building designers are increasingly relying on complex fenestration systems to reduce energy consumed for lighting and HVAC in low energy buildings. Radiance, a lighting simulation program, has been used to conduct daylighting simulations for complex fenestration systems. Depending on the configurations, the simulation can take hours or even days using a personal computer. This paper describes how to accelerate the matrix multiplication portion of a Radiance three-phase daylight simulation by conducting parallel computing on heterogeneous hardware of a personal computer. The algorithm was optimized and the computational part was implemented in parallel using OpenCL. The speed of new approach was evaluated using various daylighting simulation cases on a multicore central processing unit and a graphics processing unit. Based on the measurements and analysis of the time usage for the Radiance daylighting simulation, further speedups can be achieved by using fast I/O devices and storing the data in a binary format.

University of Miami; Zuo, Wangda; McNeil, Andrew; Wetter, Michael; Lee, Eleanor S.

2013-04-30T23:59:59.000Z

80

Developing a dynamic envelope/lighting control system with field measurements  

SciTech Connect

The feasibility of an intelligent venetian blind/lighting control system was tested in a 1:3 scale model outdoors under variable sun and sky conditions. The control algorithm, block direct sun and meet the design workplane illuminance level, was implemented using commercially available and custom designed blind and lighting systems hardware. While blocking direct sunlight, the blinds were properly controlled to maintain the design workplane illuminance within a tolerance of -10%, +25% when there was sufficient daylight. When daylight levels alone were inadequate, the electric lighting control system maintained the design workplane illuminance. The electric lighting could be turned off if a user-specified time period at minimum power was exceeded. Lighting energy savings of 51-71% (southwest) and 37-75% (south) was attained for the period from 8:00 to 17:00 on clear sunny days, compared to a fixed, partially closed blind with the same lighting system. Practical details for implementation and commissioning are discussed. The impact of control variations, such as profile angle, time step interval, and control area, on energy demand is investigated.

DiBartolomeo, D.L.; Lee, E.S.; Rubinstein, F.M.; Selkowitz, S.E.

1996-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "daylighting control 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

Daylighting: Measuring the Performance of Light Shelves and Occupant-Controlled Blinds on a Dimmed Lighting Systems  

E-Print Network (OSTI)

The design of a day lighted space is both an art and a science. The biggest challenge facing the lighting designer is to admit only as much light as necessary and distribute it evenly throughout the space without introducing glare or heat. In warm...

Floyd, D. B.; Parker, D. S.

1998-01-01T23:59:59.000Z

82

Daylighting simulation: methods, algorithms, and resources  

SciTech Connect

This document presents work conducted as part of Subtask C, ''Daylighting Design Tools'', Subgroup C2, ''New Daylight Algorithms'', of the IEA SHC Task 21 and the ECBCS Program Annex 29 ''Daylight in Buildings''. The search for and collection of daylighting analysis methods and algorithms led to two important observations. First, there is a wide range of needs for different types of methods to produce a complete analysis tool. These include: Geometry; Light modeling; Characterization of the natural illumination resource; Materials and components properties, representations; and Usability issues (interfaces, interoperability, representation of analysis results, etc). Second, very advantageously, there have been rapid advances in many basic methods in these areas, due to other forces. They are in part driven by: The commercial computer graphics community (commerce, entertainment); The lighting industry; Architectural rendering and visualization for projects; and Academia: Course materials, research. This has led to a very rich set of information resources that have direct applicability to the small daylighting analysis community. Furthermore, much of this information is in fact available online. Because much of the information about methods and algorithms is now online, an innovative reporting strategy was used: the core formats are electronic, and used to produce a printed form only secondarily. The electronic forms include both online WWW pages and a downloadable .PDF file with the same appearance and content. Both electronic forms include live primary and indirect links to actual information sources on the WWW. In most cases, little additional commentary is provided regarding the information links or citations that are provided. This in turn allows the report to be very concise. The links are expected speak for themselves. The report consists of only about 10+ pages, with about 100+ primary links, but with potentially thousands of indirect links. For purposes of the printed version, a list of the links is explicitly provided. This document exists in HTML form at the URL address: http://eande.lbl.gov/Task21/dlalgorithms.html. An equivalent downloadable PDF version, also with live links, at the URL address: http://eande.lbl.gov/Task21/dlalgorithms.pdf. A printed report can be derived directly from either of the electronic versions by simply printing either of them. In addition to the live links in the electronic forms, all report forms, electronic and paper, also have explicitly listed link addresses so that they can be followed up or referenced manually.

Carroll, William L.

1999-12-01T23:59:59.000Z

83

OpenStudio Enhancements for Whole-Building Daylighting, Airflow...  

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

Enhancements for Whole-Building Daylighting, Airflow, and Energy Modeling Leveraging Interoperable Building Information Modeling Data - 2014 BTO Peer Review OpenStudio Enhancements...

84

Assessing the Feasibility of Creek Daylighting in San Francisco, Part I: A Synthesis of Lessons Learned from Existing Urban Daylighting Projects  

E-Print Network (OSTI)

daylighting can be cost- comparable with conventional, infrastructure- and material-intensive engineering solutions

Smith, Brooke Ray

2007-01-01T23:59:59.000Z

85

Virtual Control System Environment  

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

Control System Environment Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin...

86

Photosensors and associated control systems can dim or raise fluorescent  

E-Print Network (OSTI)

Seaman mseaman@energy.state.ca.us Architectural Energy Corporation www.archenergy.com/lrp Judie Porter to reduce lighting energy use in classrooms by 60 percent, reduce lighting demand in controlled spaces by 40 photosensor design accurately senses daylight availability, cutting electric light usage 40­60 percent or more

87

High-Efficiency Solar Cogeneration with TPV & Fiber-Optic Daylighting...  

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

High-Efficiency Solar Cogeneration with TPV & Fiber-Optic Daylighting High-Efficiency Solar Cogeneration with TPV & Fiber-Optic Daylighting Lead Performer: Creative Light Source,...

88

MANAGEMENT CONTROL SYSTEM IN PUBLIC  

E-Print Network (OSTI)

1 MANAGEMENT CONTROL SYSTEM IN PUBLIC ADMINISTRATION: BEYOND RATIONAL MYTHS Nicolas Berland of practices around their management control systems. Despite some apparent failures, the implemented systems organizations have developed management control systems. Historically, these systems have been invented

Paris-Sud XI, Université de

89

Experimental Evaluation of Innovative Wall Daylighting Systems  

E-Print Network (OSTI)

to deliver most of the light from the projecting mirror to the two inner spaces. One way of doing this without causing glare to the occupants is to project the light on the area of ceiling over the two spaces and allow the ceiling to serve aa a secondary... those two spaces (see Figure 10). To achieve this optical behavior, the appropriate cross- sectional shape for the projecting mirror would be an ellipse with one of its foci at the line souree (i.e., at the center of the glazing) and one of its foci...

Place, J. W.; Howard, T. C.; Paulos, S.; Chung, K.

1988-01-01T23:59:59.000Z

90

Daylighting systems for the Kuwait National Museum  

E-Print Network (OSTI)

for the degree of MASTER OF SCIENCE Approved as to style and content by: _______________________________ _____________________________ Liliana O. Beltran Paul K.... Woods (Chair of Committee) (Member) _______________________________ _____________________________ Rodney C. Hill...

Ahn, Byoungsoo

2005-08-29T23:59:59.000Z

91

Reduce Threshold for Toplit Daylighting Area  

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

Supporting analysis for proposed Supporting analysis for proposed changes to the commercial provisions of the 2012 IECC: Reduce Threshold for Toplit Daylighting Area R Hart R Athalye Pacific Northwest National Laboratory December 2012 2 Proposal Description This proposal modifies Section C402.3.2 of the 2012 IECC for the 2015 version. It reduces the area threshold for skylight daylit zones from 10,000 square feet to 2,000 square feet. It maintains 15 foot ceiling height requirement and the exception for climate zones 6 through 8. Energy Impact Based on average national energy prices 1 of $0.99 per therm and $0.1032 per kWh, the net savings are calculated with EnergyPlus(tm) 2 from whole building energy savings that result from reduced lighting, and depending on climate zone, increased or decreased heating and cooling.

92

Fuel control system  

SciTech Connect

A fuel control system is described comprising: a fuel rack movable in opposite fuel-increasing and fuel-decreasing directions; a rack control member movable in opposite fuel-increasing and fuel-decreasing directions; servo system means for moving the fuel rack in response to movement of the rack control member an electrically energizable member movable in opposite fuel-increasing and fuel-decreasing directions, the electrically energizable member being urged to move in its fuel-decreasing direction when energized; first coupling means for connecting the electrically energizable member to the rack control member to move the rack control member in its fuel-decreasing direction in response to movement of the electrically energizable member in its fuel-decreasing direction; a mechanical governor control having a member movable in opposite fuel-increasing and fuel-decreasing directions; second coupling means for connecting the mechanical governor to the rack control member to move the rack control member in its fuel-decreasing direction in response to movement of the mechanical governor member in its fuel-decreasing direction; bias means for biasing the rack control member to move in its fuel-increasing direction.

Staniak, W.A.; Samuelson, R.E.; Moncelle, M.E.

1986-10-14T23:59:59.000Z

93

Burner control system  

SciTech Connect

A burner control apparatus for use with a furnace installation that has an operating control to produce a request for burner operation, a flame sensor to produce a signal when flame is present in the monitored combustion chamber, and one or more devices for control of ignition and/or fuel flow. The burner control apparatus comprises lockout apparatus for de-energizing the control apparatus, a control device for actuating the ignition and/or fuel control devices, and a timing circuit that provides four successive and partially overlapping timing intervals of precise relation, including a purge timing interval, a pilot ignition interval, and a main fuel ignition interval. The present invention further includes a burner control system which verifies the proper operation of certain sensors in a burner or furnace including particularly the air flow sensor. Additionally, the present system also prevents an attempt to ignite a burner if a condition is detected which indicates that the air flow sensor has been bypassed or wedged in the actuated position.

Cade, P.J.

1981-01-06T23:59:59.000Z

94

An intuitive daylighting performance analysis and optimization approach  

E-Print Network (OSTI)

The effective integration of daylighting considerations into the design process requires many issues to be considered simultaneously, such as daily and seasonal variations, illumination, and thermal comfort. To address the ...

Andersen, Marilyne

95

LBNL Window & Daylighting Software -- COMFEN  

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

5 Beta 5 Beta (5.0.05 -- January 1, 2013) Last Updated: 01/01/2013 Screen Shots Opening Screen, Overview Tab Climate Tab Facade Edit Screen The Facade Library screen allows the user to define a facade with windows, and overhangs and fins for each window. COMFEN displays the geometry of each window that is defined as well as the position in the facade. Each window can be defined with a different glazing system and frame combination if desired. Multiple facades can be defined on this screen, and then compared in the Project screen, described below. Glazed Wall Assembly Definition Glazing System Library The Glazing System Library allows the user to make new glazing systems or import them from a WINDOW 6 database. Shading Control Scheme Library The Shading Control Scheme Library screen allows the user to define interior, exterior and between glass shading systems for

96

LBNL Window & Daylighting Software -- COMFEN  

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

1 1 Last Updated: 10/04/2012 Screen Shots Opening Screen, Overview Tab Climate Tab Facade Edit Screen The Facade Library screen allows the user to define a facade with windows, and overhangs and fins for each window. COMFEN displays the geometry of each window that is defined as well as the position in the facade. Each window can be defined with a different glazing system and frame combination if desired. Multiple facades can be defined on this screen, and then compared in the Project screen, described below. Glazed Wall Assembly Definition Glazing System Library The Glazing System Library allows the user to make new glazing systems or import them from a WINDOW 6 database. Shading Control Scheme Library The Shading Control Scheme Library screen allows the user to define interior, exterior and between glass shading systems for

97

Securing Control Systems Modems  

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

Recommended Practice for Securing Recommended Practice for Securing Control System Modems January 2008 iii ABSTRACT This paper addresses an often overlooked "backdoor" into critical infrastructure control systems created by modem connections. A modem's connection to the public telephone system is similar to a corporate network connection to the Internet. By tracing typical attack paths into the system, this paper provides the reader with an analysis of the problem and then guides the reader through methods to evaluate existing modem security. Following the analysis, a series of methods for securing modems is provided. These methods are correlated to well-known networking security methods. iv ACKNOWLEDGEMENT This document was developed for the U.S. Department of Homeland

98

Compressed Air System Control Strategies  

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

This tip sheet briefly discusses compressed air system control strategies as a means to improving and maintaining system performance.

99

Empirical assessment of a prismatic daylight-redirecting window film in a full-scale office testbed  

SciTech Connect

Daylight redirecting systems with vertical windows have the potential to offset lighting energy use in deep perimeter zones. Microstructured prismatic window films can be manufactured using low-cost, roll-to-roll fabrication methods and adhered to the inside surface of existing windows as a retrofit measure or installed as a replacement insulating glass unit in the clerestory portion of the window wall. A clear film patterned with linear, 50-250 micrometer high, four-sided asymmetrical prisms was fabricated and installed in the south-facing, clerestory low-e, clear glazed windows of a full-scale testbed facility. Views through the film were distorted. The film was evaluated in a sunny climate over a two-year period to gauge daylighting and visual comfort performance. The daylighting aperture was small (window-towall ratio of 0.18) and the lower windows were blocked off to isolate the evaluation to the window film. Workplane illuminance measurements were made in the 4.6 m (15 ft) deep room furnished as a private office. Analysis of discomfort glare was conducted using high dynamic range imaging coupled with the evalglare software tool, which computes the daylight glare probability and other metrics used to evaluate visual discomfort. The window film was found to result in perceptible levels of discomfort glare on clear sunny days from the most conservative view point in the rear of the room looking toward the window. Daylight illuminance levels at the rear of the room were significantly increased above the reference window condition, which was defined as the same glazed clerestory window but with an interior Venetian blind (slat angle set to the cut-off angle), for the equinox to winter solstice period on clear sunny days. For partly cloudy and overcast sky conditions, daylight levels were improved slightly. To reduce glare, the daylighting film was coupled with a diffusing film in an insulating glazing unit. The diffusing film retained the directionality of the redirected light spreading it within a small range of outgoing angles. This solution was found to reduce glare to imperceptible levels while retaining for the most part the illuminance levels achieved solely by the daylighting film.

Thanachareonkit, Anothai; Lee, Eleanor S.; McNeil, Andrew

2013-08-31T23:59:59.000Z

100

Design daylight availability for greenhouses using supplementary lighting  

Science Journals Connector (OSTI)

An analysis is presented of daylight availability data in terms of suitable design criteria for greenhouse supplementary lighting systems. Percentile exceedance values for the daily photosynthetically active radiation (PAR) integral are proposed as the relevant design criteria, and a method is presented for using these data to determine the target supplementary light level in a greenhouse. A large set of daily radiation data were analysed to generate percentile data for 201 locations in the USA varying in latitude from 18.4 to 71.3 and elevation from 1 to 2300m. Analyses were carried out to assess the dependence of these percentile data on site latitude and elevation, and a mathematical model was fitted to the data. Results indicate that percentile data vary negatively with latitude and positively with elevation in a manner that can be calculated using these two inputs and a percentile-related coefficient with a resulting r2 of 0.982. The strength of relationship is greatest for moderate and high percentiles, with a mean absolute error (MAE) of 2.0molm?2d?1 for percentiles of 70% and above. These results indicate that percentile exceedance data can be used as a basis for assimilative lighting system design, both for locations near areas where recorded data are available, and for locations where only latitude and elevation data are known.

Daniel Ciolkosz

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "daylighting control 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

Heliostat control system strategies  

SciTech Connect

The purpose of this study is to identify, evaluate, and recommend potential alternatives to methods currently employed in the control of and communication with a heliostat array in a solar thermal power plant. The principle goal of this study is to demonstrate the feasibility of reducing significantly the current projected costs for heliostat array communication, control and actuator subsystems. A number of alternatives to the present technique of using dedicated data transmission cables for communication between a central computer and heliostat computer are described in the paper. It appears that by converting to a radio frequency communication system or a carrier-current system that a number of problems (including cost) associated with dedicated data transmission cable can be avoided. To relieve the computing load of the central computer it is suggested that the heliostat microcomputer be given more direct responsibility for sun vector calculations and error compensation routines for each individual heliostat. By using the radio frequency or carriercurrent communication scheme, and increasing each heliostat computer's computing load, there will be a significant reduction of cost for control of the heliostat field for third generation solar thermal power plants. The results of this study indicate that the combined communication, control, and actuator subsystem costs can potentially be reduced to less than $500/heliostat (approximately $9/m/sup 2/); this is a significant reduction compared with the current projected corresponding composite costs of $1343/heliostat (approximately $25/m/sup 2/) for the second generation concept.

Pearson, J.; Chen, B.

1983-11-01T23:59:59.000Z

102

Turbocharger control system  

SciTech Connect

A turbocharger control system is described for an engine having a turbocharger with a variable output compressor driven by a variable input turbine, the compressor boosting the pressure of an input manifold of the engine and the turbine being run from the exhaust gases of the engine. The control system consists of: a computing circuit including input circuit means for receiving input signals representative of operational parameters of the engine, programmable memory means for storing predetermined tabular data and sequential and computational instructions, processor means responsive to the memory means for receiving the input signals and generating output signals as a function of the input signals, tabular data, and instructions, and output circuit means for outputing the plurality of output signals, sensor means connected to the engine and the computing circuit for sensing the pressure in the manifold, the temperature of the exhaust gases, the speed of the engine, and position of the throttle, compressor and turbine actuators of the engine and generating signals representative thereof; and actuator means connected to the output circuit means for controlling the position of the actuators in response to predetermined ones of the output signals, respectively; the computing circuit, sensor means, and actuator means defining a turbine control loop for regulating the input of the exhaust gasses to the turbine as a function of the error difference between an optimum manifold pressure of the engine and the actual manifold pressure of the engine; and a compressor control loop for regulating the output of air flow from the compressor as a function of the speed and acceleration of the engine.

Fujawa, C.S.; Masteller, S.B.

1986-06-10T23:59:59.000Z

103

Crawling the Control System  

SciTech Connect

Information about accelerator operations and the control system resides in various formats in a variety of places on the lab network. There are operating procedures, technical notes, engineering drawings, and other formal controlled documents. There are programmer references and API documentation generated by tools such as doxygen and javadoc. There are the thousands of electronic records generated by and stored in databases and applications such as electronic logbooks, training materials, wikis, and bulletin boards and the contents of text-based configuration files and log files that can also be valuable sources of information. The obvious way to aggregate all these sources is to index them with a search engine that users can then query from a web browser. Toward this end, the Google "mini" search appliance was selected and implemented because of its low cost and its simple web-based configuration and management. In addition to crawling and indexing electronic documents, the appliance provides an API that has been used to supplement search results with live control system data such as current values of EPICS process variables and graphs of recent data from the archiver.

Theodore Larrieu

2009-10-01T23:59:59.000Z

104

Top 8 Things You Didn't Know About Daylight Saving Time | Department...  

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

to get the British parliament to pass a Daylight Saving Bill in 1908. In the end, Germany was the first country to implement Daylight Saving Time in 1916 to conserve resources...

105

Graphical Representation of Climate-Based Daylight Performance to Support Architectural Design  

E-Print Network (OSTI)

Many conventional daylighting design tools are limited in that each simulation represents only one time of year and time of day (or a single, theoretical overcast sky condition). Since daylight is so variable due to the ...

Kleindienst, Sin

106

Computerized Control of Environmental Systems  

E-Print Network (OSTI)

This paper examines the actual implementation of two computerized environmental system maintenance control centers. Project "A" is a candy manufacturing plant where controlled systems included subfreezing storage, HVAC, and cold storage (40F to 55F...

Gatti, F. L.

1980-01-01T23:59:59.000Z

107

Thermodynamics of feedback controlled systems  

Science Journals Connector (OSTI)

We compute the entropy reduction in feedback controlled systems due to the repeated operation of the controller. This was the lacking ingredient to establish the thermodynamics of these systems, and in particular of Maxwells demons. We illustrate some of the consequences of our general results by deriving the maximum work that can be extracted from isothermal feedback controlled systems. As a case example, we finally study a simple system that performs an isothermal information-fueled particle pumping.

F. J. Cao and M. Feito

2009-04-10T23:59:59.000Z

108

Environmental control system  

SciTech Connect

An environmental control system for controlling the environmental conditions in a swimming pool hall 1 comprises a heat pump having a multi-section evaporator 8, compressors 23a and 23b and a multi-section condensor 18. In the day-time, the dry bulb temperature in the pool hall is maintained by circulating space air through a duct 3 to the evaporator 8 where the latent heat is recovered from the moisture laden air. This heat is rejected via the condensor 18 either to the now drier recirculated air or fresh air from an inlet 13 or a mixture of air from the two sources. In a night mode of operation, circulation of space air through the duct 3 is prevented and instead it is recirculated via a direct recirculation duct 53 and is heated by the condensor 18, the heat used to do this being recovered from outside air inducted into the evaporator 8 via an inlet 50. In order to prevent frosting of the evaporator when the outside air temperature is too low, a damper 52 may be opened to allow some space air to pass through the evaporator 8 and raise its temperature. In order to increase the heat recovery capability of the compressor, storage tank 56 is used to collect waste water from showers etc. and also from backwash through the pool water filter and when this tank is full, its water is chilled by means of a water chiller 15 in parallel with the evaporator and the heat so recovered is rejected to the re-circulating space air by means of the condensor 18.

Foley, P. N.; Turbard, A. M.

1985-05-21T23:59:59.000Z

109

Security Metricsfor Process Control Systems  

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

This document describes the foundations of metrics, discusses application of these metrics to control system environments, introduces a metrics taxonomy, and suggests usage of metrics to achieve...

110

Solar Energy Control System Design.  

E-Print Network (OSTI)

?? This thesis covers design, simulation and implementation of a solar energy control system for an on grid energy storage device. The design covers several (more)

Yang, Sun

2013-01-01T23:59:59.000Z

111

Empirical assessment of a prismatic daylight-redirecting window film in a full-scale office testbed  

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

for presentation to the IESNA 2013 Annual Conference, Huntington Beach, CA, for presentation to the IESNA 2013 Annual Conference, Huntington Beach, CA, October 26-29, 2013 and for publication in Leukos, the journal of the IESNA. Empirical assessment of a prismatic daylight- redirecting window film in a full-scale office testbed Anothai Thanachareonkit, Eleanor S. Lee, Andrew McNeil Building Technologies and Urban Systems Department, Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Mailstop 90-3111, 1 Cyclotron Road, Berkeley, CA 94720 USA Abstract Daylight redirecting systems with vertical windows have the potential to offset lighting energy use in deep perimeter zones. Microstructured prismatic window films can be manufactured using low-cost, roll-to-roll fabrication methods and adhered to the inside surface of existing

112

Optimal Control of Distillation Systems  

E-Print Network (OSTI)

The optimum performance of a distillation system can be evaluated by examining the product purities, the product recoveries, and the system's capability to respond to small or large, expected or unexpected, plant disturbances. An optimal control...

Chatterjee, N.; Suchdeo, S. R.

1984-01-01T23:59:59.000Z

113

Redundant marine engine control system  

SciTech Connect

An electro-mechanical engine control system is described for the shift and throttle functions of marine engines which comprises an electronically-controlled mechanical servo control means coupleable to the shift and throttle functions of a marine engine; a manually-operable ship-board operator engine shift and throttle control means; and an electro-mechanical transfer means coupled to the operator control means and to the servo control means for transferring operator shift and throttle settings to the servo control means, the transfer means being both electronically and mechanically coupled to the servo control means and being constructed and arranged whereby the transfer means will mechanically actuate the servo control means in the absence of electrical power and will electronically actuate the servo control means when electrical power is applied to the servo control means; the transfer means including coupling means preferentially electrically-coupling the operator control means to the servo control means, the coupling means being so constructed and arranged to automatically mechanically-couple the operator control means to the servo control means in the event of electrical power failure and to automatically electrically-couple the operator control means to the servo control means when electrical power is restored.

Burkenpas, R.W.

1993-06-29T23:59:59.000Z

114

Virtual Control Systems Environment (VCSE)  

SciTech Connect

Will Atkins, a Sandia National Laboratories computer engineer discusses cybersecurity research work for process control systems. Will explains his work on the Virtual Control Systems Environment project to develop a modeling and simulation framework of the U.S. electric grid in order to study and mitigate possible cyberattacks on infrastructure.

Atkins, Will

2012-10-08T23:59:59.000Z

115

Virtual Control Systems Environment (VCSE)  

ScienceCinema (OSTI)

Will Atkins, a Sandia National Laboratories computer engineer discusses cybersecurity research work for process control systems. Will explains his work on the Virtual Control Systems Environment project to develop a modeling and simulation framework of the U.S. electric grid in order to study and mitigate possible cyberattacks on infrastructure.

Atkins, Will

2014-02-26T23:59:59.000Z

116

LBNL Windows & Daylighting Software -- WINDOW Documentation  

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

Vertical Louvered Blind Shading Systems Vertical Louvered Blind Shading Systems It is now possible to model Vertical Louvered Blinds in the Shading Layer Library, and then add them to a glazing system in the Glazing System Library. Shading Layer Library In the Shading Layer Library, set the Type to "Venetian blind, vertical" and then input values for the slat width, slat spacing and tilt will appear. The graphic image is a "plan" view of the vertical louvered blinds and will display the geometry of the blind based on the input values. Glazing System Library Once the Vertical Louvered Blind is defined in the Shading Layer Library, it can be added to a glazing system in the Glazing System Library. The blind in the screen shot below has been added to the inside of a double-glazed IGU.

117

LBNL Windows & Daylighting Software -- WINDOW Documentation  

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

Specular Glazing Systems Specular Glazing Systems NFRC THERM 6.3 / WINDOW 6.3 Simulation Manual July 2013: bullet Entire Manual in PDF Format approximate 8 MB Comparison of WINDOW 5 / THERM 5 and WINDOW 6 / THERM 6 Results for Specular Glazing Systems (PDF Format) NFRC WINDOW 6 / THERM 6 Training for Specular Systems (Power Point Presentation, Oct/Nov 2010) Tutorials Complex Glazing Systems bullet WINDOW 6.2 / THERM 6.2 Research Version User Manual (Documents features in WINDOW6 and THERM 6 for modeling complex glazing systems) bullet WINDOW 6.2 / THERM 6.2 Simulation Manual Chapter for Complex Glazing (Draft) This was used for NFRC Simulator training in June 2009, and includes detailed descriptions for modeling venetian blinds between glass and frits. bullet Complex Glazing Summary -- PDF File

118

LBNL Windows & Daylighting Software -- WINDOW Documentation  

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

Cellular / Honeycomb Shades Cellular / Honeycomb Shades Updated 09/30/2013 It is now possible to model cellular / honeycomb shading systems in the Shading System Library and then add them to a glazing system in the Glazing System Library. NOTE: Before attempting to calculate a glazing system with a cellular shade, you must make the following change to the THERM7.ini file, which is located in C:\Users\Public\LBNL\Settings. Close WINDOW7 before making this change. DocPath=C:\Users\Public\LBNL\WINDOW7\debug Shading Layer Library A cellular / honeycomb shade can now be defined in the Shading Layer Library. Defining this type of shading system requires an XML file which contains information about the cell geometry and the material thermal and optical properties. WINDOW can model two different types of cellular shades:

119

Top 8 Things You Didn't Know About Daylight Saving Time | Department of  

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

Top 8 Things You Didn't Know About Daylight Saving Time Top 8 Things You Didn't Know About Daylight Saving Time Top 8 Things You Didn't Know About Daylight Saving Time October 30, 2013 - 12:36pm Addthis This Sunday, people across the country will set their clocks back an hour, marking an end to Daylight Saving Time. | Photo courtesy of iStock Photo, WoodyUpstate. This Sunday, people across the country will set their clocks back an hour, marking an end to Daylight Saving Time. | Photo courtesy of iStock Photo, WoodyUpstate. Rebecca Matulka Rebecca Matulka Digital Communications Specialist, Office of Public Affairs Looking for Energy-Saving Tips? Check out our lighting page to learn about ways to save electricity. Learn how to incorporate daylighting into your home. For more ways to save, visit Energy Saver. This article is part of the Energy.gov series highlighting the "Top

120

Energy Use Intensity and its Influence on the Integrated Daylighting Design of a Large Net Zero Energy Building: Preprint  

SciTech Connect

Net-zero energy buildings generate as much energy as they consume and are significant in the sustainable future of building design and construction. The role of daylighting (and its simulation) in the design process becomes critical. In this paper we present the process the National Renewable Energy Laboratory embarked on in the procurement, design, and construction of its newest building, the Research Support Facility (RSF) - particularly the roles of daylighting, electric lighting, and simulation. With a rapid construction schedule, the procurement, design, and construction had to be tightly integrated; with low energy use. We outline the process and measures required to manage a building design that could expect to operate at an efficiency previously unheard of for a building of this type, size, and density. Rigorous simulation of the daylighting and the electric lighting control response was a given, but the oft-ignored disconnect between lighting simulation and whole-building energy use simulation had to be addressed. The RSF project will be thoroughly evaluated for its performance for one year; preliminary data from the postoccupancy monitoring efforts will also be presented with an eye toward the current efficacy of building energy and lighting simulation.

Guglielmetti , R.; Scheib, J.; Pless, S. D.; Torcellini , P.; Petro, R.

2011-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "daylighting control 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

CALIFORNIA ENERGY Daylight and Retail Sales  

E-Print Network (OSTI)

through the integrated design, construction, and operation of building systems. The Integrated Energy to the final report of a larger research effort called Integrated Energy Systems: Productivity and Building Heschong, Project Director Fair Oaks, California Managed By: New Buildings Institute Cathy Higgins, Program

122

LBNL Windows & Daylighting Software -- WINDOW Documentation  

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

Vacuum Glazing Modeling Vacuum Glazing Modeling It is now possible to model vacuum glazing in WINDOW 7. The first step is to define a new vacuum "gap" in the "Gap Library" (formerly the Gas Library). Then that vacuum gap is used in a glazing system to calculate the thermal characteristics of the glazing system with a vacuum gap. Gap Library The Gas Library has been renamed the Gap Library. To define a vacuum gap, check the "Vacuum" checkbox (this is only available for single gases, not gas mixtures). When this box is checked, new input variables will appear, including the vacuum pressure, the specific heat ratio and molecular weight of the vacuum gas. It is also necessary to define a pillar system for the vacuum gap. Pillar Definition Double click the double arrow to the right of the Pillar Definition pulldown to define a new pillar system. Define the shape and dimensions of the pillar system.

123

LBNL Windows & Daylighting Software -- WINDOW Documentation  

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

Deflection Modeling Deflection Modeling It is now possible to model the effects of glass deflection in WINDOW 7. Glazing System Library The Glazing System Library is where the deflection modeling input values are entered. When the "Model Deflection" box is checked, a Deflection input box appears. When the Glazing System is calculated, two rows of results, one for the undeflected state and one for the deflected state, appear for Center of Glass Results, Temperature Data and Angular data. In addition, a Deflection tab appears, which shows the deflection of each glass layer and the resulting gap width for each gap. Glazing System Deflect Input There are two options for defining the deflection in a glazing system, by choosing from the "Input" pulldown list:

124

Using the whole-building design approach to incorporate daylighting into a retail space: Preprint  

SciTech Connect

This paper focuses on implementation of daylighting into the Bighorn Center, a collection of home improvement retail spaces in Silverthorne, Colorado, which were constructed in three phases. Daylighting was an integral part of the design of the Phase 3 building. Energy consultants optimized the daylighting design through detailed modeling using an hourly building energy simulation tool. Energy consultants also used this tool to address the building owner's concerns related to customer comfort and increased product sales.

Hayter, S.; Torcellini, P.; Eastment, M.; Judkoff, R.

2000-06-21T23:59:59.000Z

125

LBNL Windows & Daylighting Software -- WINDOW Documentation  

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

2 2 (7.2.29 -- December 29 2013) Release Notes Updated: 12/29/13 If you find bugs, or have comments about this version, please do not hesitate to send an email to WINDOWHelp@lbl.gov to report your findings. Getting feedback from users is how we improve the program. WINDOW 7.2.29 (December 29, 2013) Program Changes Glazing System Shading System Details For shading system in a Glazing System Library construction, the emittances, conductance and TIR are not displayed, as they are only available after a calculation has been completed. Perforated Screens An input value for "Effective Openness Factor" has been added to the Shading Layer Library for perforated screens. At a future date, we will update the program to calculate this value automatically.

126

LBNL Window & Daylighting Software -- CGDB  

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

Overview Overview The LBNL WINDOW and THERM simulation programs (versions 6 and higher) have the capability to model "complex glazing systems" which include woven shades, venetian blinds, fritted glass, and other systems that can be characterized by BSDF (Bi-Directional Scattering Distribution Function) files. To support the modeling of these complex systems, it is necessary to characterize the optical and thermal properties of the materials and the systems being modeled. The Complex Glazing Database (CGDB) contains the data needed to model various manufacturers' systems. LBNL is still developing the measuring and submittal procedures so that manufacturers can submit measured data for review and inclusion in future CGDB releases. When these procedures are complete, it is hoped that manufacturers will measure and submit data for their products to LBNL for inclusion in the CGDB. In a similar process to the IGDB (International Glazing Database) it is envisioned that the CGDB will be released multiple times per year as new materials and systems are measured and added to the database.

127

Delight2 Daylighting Analysis in Energy Plus: Integration and Preliminary User Results  

E-Print Network (OSTI)

solution to the issue of accounting for solar/thermal influences that will likely change as techniques analogous to the daylighting

Carroll, William L.; Hitchcock, Robert J.

2005-01-01T23:59:59.000Z

128

Integrated control system and method  

DOE Patents (OSTI)

An integrated control system for use with an engine connected to a generator providing electrical power to a switchgear is disclosed. The engine receives gas produced by a gasifier. The control system includes an electronic controller associated with the gasifier, engine, generator, and switchgear. A gas flow sensor monitors a gas flow from the gasifier to the engine through an engine gas control valve and provides a gas flow signal to the electronic controller. A gas oversupply sensor monitors a gas oversupply from the gasifier and provides an oversupply signal indicative of gas not provided to the engine. A power output sensor monitors a power output of the switchgear and provide a power output signal. The electronic controller changes gas production of the gasifier and the power output rating of the switchgear based on the gas flow signal, the oversupply signal, and the power output signal.

Wang, Paul Sai Keat; Baldwin, Darryl; Kim, Myoungjin

2013-10-29T23:59:59.000Z

129

LBNL Windows & Daylighting Software -- WINDOW Documentation  

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

Optics 6.0 Optics 6.0 (6.0 -- February 13, 2012) Release Notes Updated: 07/16/12 Program Changes Microsoft Windows 7 / Vista Operating System"Aware" Optics now installs and operates much better under the Microsoft Windows 7 and Vista operating systems. It is no longer necessary to run the "VistaFix" batch file after installing the program. Fixed Bugs If you find bugs, or if you think these have not been fixed, please do not hesitate to send an email to OpticsHelp@lbl.gov to report your findings. Getting feedback from users is how we improve the program. Paths Appear in Tools/Options In the Microsoft Windows 7 / Vista Operating System environments, the program would not display the directory paths in the Tools / Options "File Locations" dialog box. This is now fixed.

130

Pump control system for windmills  

DOE Patents (OSTI)

A windmill control system having lever means, for varying length of stroke of the pump piston, and a control means, responsive to the velocity of the wind to operate the lever means to vary the length of stroke and hence the effective displacement of the pump in accordance with available wind energy, with the control means having a sensing member separate from the windmill disposed in the wind and displaceable thereby in accordance with wind velocity.

Avery, Don E. (45-437 Akimala St., Honolulu, HI 96744)

1983-01-01T23:59:59.000Z

131

Development of Building Automation and Control Systems  

E-Print Network (OSTI)

A design flow for building automation and control systems,Development of Building Automation and Control Systems Yangdesign of the build- ing automation system (including the

Yang, Yang; Zhu, Qi; Maasoumy, Mehdi; Sangiovanni-Vincentelli, Alberto

2012-01-01T23:59:59.000Z

132

LBNL Windows & Daylighting Software -- WINDOW  

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

WINDOW WINDOW NFRC Certification Version Release Version Beta Version WINDOW 6.3 (For NFRC Certification and modeling Complex Glazing Systems) WINDOW 7.1 For modeling vacuum glazing, deflected glass, vertical venetian blinds and perforated screens WINDOW 7.2 For modeling Cellular Shades, in addition to vacuum glazing, deflected glass, vertical venetian blinds and perforated screens Download WINDOW 6.3 (for NFRC Certification and complex glazing systems) Download WINDOW 7.1 Download WINDOW 7.2 Knowledge Base (Check here first if you are experiencing a problem with the software) Knowledge Base (Check here first if you are experiencing a problem with the software) Knowledge Base (Check here first if you are experiencing a problem with the software) New Features

133

LBNL Windows & Daylighting Software -- WINDOW Documentation  

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

CGDB Import Into WINDOW CGDB Import Into WINDOW Updated: 11/14/12 Detailed Instructions for Importing CGDB data into WINDOW These instructions apply to either WINDOW 6 or 7. WINDOW 6 vs WINDOW 7 Because the database structure of WINDOW 6 is different that WINDOW 7, there are different CGDB files to go with each version of WINDOW. There are also different versions of the XML files for each version, because in WINDOW 7 some problems with the files were fixed. Setup of CGDB The CGDB consists of a WINDOW database of records in the Shading Layer, Shade Material Library, and Glass Library, as well as a set of text files for systems that reference BSDF XML files. Database: The installation will put two databases into the "LBNL Shared" directory: (the location will depend on your operating system):

134

Energy saving in lighting system with fuzzy logic controller which uses light-pipe and dimmable ballast  

Science Journals Connector (OSTI)

Approximately, 20% of the electricity consumed in the world is spent for lighting. More efficient utilization of the sun, as a natural source of light, for lighting would save electricity used for lighting. The aim of this study is to illuminate a windowless room via a light-pipe and dimmable electronic ballasts. Light-pipe is used for the illumination of the space during the daytime. In case of inadequate daylight, artificial lighting is made via dimmable electronic ballasts and fluorescence lamps. Artificial lighting is supervised by a fuzzy logic control system to keep the illumination level at 350lux. When there is a motion in the room, the system works with the message of the motion sensor, which, thereby, enables energy saving. Additionally, dimming the lamps result in conversation of the electrical energy used for illumination. After the experimental studies, 350lux value targeted in the work plane is achieved with 10lux error.

Serta Grgl; Nazmi Ekren

2013-01-01T23:59:59.000Z

135

LBNL Window & Daylighting Software -- RESFEN  

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

SYSTEM REQUIREMENTS GET A COPY DOCUMENTATION KNOWLEDGE BASE Overview Today's energy-efficient windows can dramatically lower the heating and cooling costs associated with windows while increasing occupant comfort and minimizing window surface condensation problems. However, consumers are often confused about how to pick the most efficient window for a residence. Product information typically offers window properties: U-factors or R-values, Solar Heat Gain Coefficients or Shading Coefficients, and air leakage rates. However, the relative importance of these properties depends on site- and building-specific conditions. Furthermore, these properties are based on static evaluation conditions that are very different from the real situation a window will be used in.

136

Position feedback control system  

DOE Patents (OSTI)

Disclosed is a system and method for independently evaluating the spatial positional performance of a machine having a movable member, comprising an articulated coordinate measuring machine comprising: a first revolute joint; a probe arm, having a proximal end rigidly attached to the first joint, and having a distal end with a probe tip attached thereto, wherein the probe tip is pivotally mounted to the movable machine member; a second revolute joint; a first support arm serially connecting the first joint to the second joint; and coordinate processing means, operatively connected to the first and second revolute joints, for calculating the spatial coordinates of the probe tip; means for kinematically constraining the articulated coordinate measuring machine to a working surface; and comparator means, in operative association with the coordinate processing means and with the movable machine, for comparing the true position of the movable machine member, as measured by the true position of the probe tip, with the desired position of the movable machine member.

Bieg, Lothar F. (Albuquerque, NM); Jokiel, Jr., Bernhard (Albuquerque, NM); Ensz, Mark T. (Albuquerque, NM); Watson, Robert D. (Tijeras, NM)

2003-01-01T23:59:59.000Z

137

LBNL Windows & Daylighting Software -- THERM Components  

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

Components Components THERM has three basic components: Graphic User Interface: a graphic user interface that allows you to draw a cross section of the product or component for which you are performing thermal calculations. Heat Transfer Analysis: a heat-transfer analysis component that includes: an automatic mesh generator to create the elements for the finite-element analysis, a finite-element solver, an optional error estimator and adaptive mesh generator, and an optional view-factor radiation model. Results: a results displayer. Graphic User Interface THERM has standard graphic capabilities associated with the Microsoft Windows™ operating system. For example, THERM allows you to use: Both mouse and cursor operations; Standard editing features, such as Cut, Copy, Paste, Select All, and Delete;

138

LBNL Windows & Daylighting Software -- WINDOW Documentation  

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

Release Notes Release Notes Updated: 11/07/11 History of COMFEN 3.1 Releases New Features Glazed Wall Assembly In addition to modeling individual windows, COMFEN now has the capability of modeling "Glazed Wall Assemblies" which allow you to specify the number of horizontal and vertical framing members, as well as their spacing, and the program automatically generates the facade. Click here for more details. Material Library COMFEN now has a Material Library, which can be used in the Wall Construction and Spandrel Libraries. See the User Manual for more details. Wall Library COMFEN now has a Wall Library which can be used to build up layers from the Material Library to define a wall. See the User Manual for more details. Spandrel Library COMFEN now has a Spandrel Library which can be used to build up layers from the Material Library to define a spandrel, including glass and glazing systems as the outer-most layers. See the User Manual for more details.

139

LBNL Windows & Daylighting Software -- WINDOW Documentation  

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

Release Notes Release Notes Updated: 10/29/12 COMFEN 4.0 Release Notes History of COMFEN 3.1 Releases New Features Natural Ventilation Model COMFEN now has the ability to model natural ventilation as a replacement for a mechanical cooling system. Click here for more details. Cost Data COMFEN now has a simple Cost module, with default costs that can be over-ridden with user data. Click here for more details. Radiance Rendering Additions There are additional Radiance Renderings available, including Illuminance Maps. Click here for more details. Program Changes Updating Database from COMFEN 4.0 to 4.1 COMFEN will automatically update your 4.0 database to be compatible with the 4.1 database structure the first time you open a 4.0 database in version 4.1. This includes adding all the cost fields to the new database, as well as default cost data. If you have any problems with updating a COMFEN 4.0 database to 4.1, please email COMFENHelp@lbl.gov

140

Daylighting Analysis through Scale Model, Full Scale Measurements and Computer Analysis for a Texas A&M University Campus Building  

E-Print Network (OSTI)

In the first part of this study, daylighting levles in an actualy classroom are compared to scale model measurements and to computer program predictions. Secondly, the daylighting effects in the building atrium are examined through the studies...

Kim, K. S.; Boyer, L. L.; Degelman, L. O.

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "daylighting control 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

A new approach in data visualization to integrate time and space variability of daylighting in the design process  

E-Print Network (OSTI)

Daylighting design has great impact on the performance and aesthetical quality of a work of architecture but requires many issues to be addressed during the design process. The way existing daylighting tools deliver data ...

Yi, Lu, S.M. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

142

Daylight in faade renewal : using new metrics to inform the retrofitting of aging modern-ear faade types  

E-Print Network (OSTI)

New methods for quantifying daylight are increasingly accessible to designers and planners. While these methods have enabled new building facades to better balance the admission of daylight with the maintenance of thermal ...

Rice, Edward Oren

2006-01-01T23:59:59.000Z

143

DOES DAYLIGHT SAVING TIME SAVE ENERGY? EVIDENCE FROM A NATURAL EXPERIMENT IN INDIANA  

E-Print Network (OSTI)

DOES DAYLIGHT SAVING TIME SAVE ENERGY? EVIDENCE FROM A NATURAL EXPERIMENT IN INDIANA Matthew J prompted temporary changes, when the Emergency Daylight Saving Time Energy Conservation Act of 1973 imposed extension to DST focused on the potential energy savings. While politi- cians argued that each additional

Kotchen, Matthew J.

144

Magnetohydrodynamic boundary layer control system  

SciTech Connect

Accordingly, it is an object of the present invention to provide an active boundary layer control system which is lightweight, operates with low in put power, and occupies little physical space. It is a further object of the invention to provide a boundary layer control system which is robust and can be operated in a damaged condition without creating a hazard to the vehicle. It is yet object of the invention to provide a magnetohydrodynamic (MHD) boundary layer control system for marine vehicles which provides a force directly on the water adjacent to the vehicle hull to provide flow separation control. The invention is a boundary layer control system using magnetic and electric fields interaction to providea driving force to energize boundary layer flow around a marine vehicle. A plurality of magnets are located circumferentially around the hull. Seawater electrodes are placed between each of the magnets and between the poles of each magnet. The resulting interaction of the electric and magnetic fields produces a Lorentz force which reduces the turbulence and may even relaminarize the flow in the boundary layer.

Meng, J.C.

1993-02-11T23:59:59.000Z

145

How Do You Use Daylighting While Reducing Excess Heat from Windows? |  

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

Do You Use Daylighting While Reducing Excess Heat from Windows? Do You Use Daylighting While Reducing Excess Heat from Windows? How Do You Use Daylighting While Reducing Excess Heat from Windows? June 16, 2011 - 7:30am Addthis On Monday, Elizabeth discussed her south-facing windows and her difficulties balancing the nice daylighting advantages with the excess heat that can come through these windows in the summer. How do you use daylighting while reducing excess heat from windows? Each Thursday, you have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. E-mail your responses to the Energy Saver team at consumer.webmaster@nrel.gov. Addthis Related Articles Fighting with South-Facing Windows This Month on Energy Savers: June 2011 Simple and inexpensive actions can help you save energy and money during the warm spring and summer months. | Photo courtesy of iStockphoto.com/eyedias.

146

Proton beam therapy control system  

DOE Patents (OSTI)

A tiered communications architecture for managing network traffic in a distributed system. Communication between client or control computers and a plurality of hardware devices is administered by agent and monitor devices whose activities are coordinated to reduce the number of open channels or sockets. The communications architecture also improves the transparency and scalability of the distributed system by reducing network mapping dependence. The architecture is desirably implemented in a proton beam therapy system to provide flexible security policies which improve patent safety and facilitate system maintenance and development.

Baumann, Michael A. (Riverside, CA); Beloussov, Alexandre V. (Bernardino, CA); Bakir, Julide (Alta Loma, CA); Armon, Deganit (Redlands, CA); Olsen, Howard B. (Colton, CA); Salem, Dana (Riverside, CA)

2008-07-08T23:59:59.000Z

147

Proton beam therapy control system  

DOE Patents (OSTI)

A tiered communications architecture for managing network traffic in a distributed system. Communication between client or control computers and a plurality of hardware devices is administered by agent and monitor devices whose activities are coordinated to reduce the number of open channels or sockets. The communications architecture also improves the transparency and scalability of the distributed system by reducing network mapping dependence. The architecture is desirably implemented in a proton beam therapy system to provide flexible security policies which improve patent safety and facilitate system maintenance and development.

Baumann, Michael A. (Riverside, CA); Beloussov, Alexandre V. (San Bernardino, CA); Bakir, Julide (Alta Loma, CA); Armon, Deganit (Longmeadow, MA); Olsen, Howard B. (Irvine, CA); Salem, Dana (Riverside, CA)

2010-09-21T23:59:59.000Z

148

Proton beam therapy control system  

DOE Patents (OSTI)

A tiered communications architecture for managing network traffic in a distributed system. Communication between client or control computers and a plurality of hardware devices is administered by agent and monitor devices whose activities are coordinated to reduce the number of open channels or sockets. The communications architecture also improves the transparency and scalability of the distributed system by reducing network mapping dependence. The architecture is desirably implemented in a proton beam therapy system to provide flexible security policies which improve patent safety and facilitate system maintenance and development.

Baumann, Michael A; Beloussov, Alexandre V; Bakir, Julide; Armon, Deganit; Olsen, Howard B; Salem, Dana

2013-06-25T23:59:59.000Z

149

Particulate Emissions Control by Advanced Filtration Systems...  

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

Particulate Emissions Control by Advanced Filtration Systems or GDI Engines Particulate Emissions Control by Advanced Filtration Systems or GDI Engines 2013 DOE Hydrogen and Fuel...

150

Secure control systems with application to cyber-physical systems  

Science Journals Connector (OSTI)

Control systems are computer-based systems with networked units consisting of sensors, actuators, control processing units, and communication devices. The role of control system is to interact, monitor, and control physical processes. Reactive power ... Keywords: SCADA systems, cyber-physical systems, secure control, security

Jin Dong; Seddik. M. Djouadi; James J. Nutaro; Teja Kuruganti

2014-04-01T23:59:59.000Z

151

Open architecture in control system integration  

SciTech Connect

Open architecture offers the manufacturing community a number of advantages in the integration of future machine control systems. Among these advantages is the ability to upgrade and take advantage of innovative new control strategies. A key enabling technology in open architecture control systems is the digital signal processor (DSP). DSPs can be used to provide a complete control system or can enhance the computational capability of larger control systems. The use of DSPs in the integration of open architecture control systems is discussed, including their impact on reliability and control system functionality. In addition, the role of DSPs in control system architecture is addressed.

Wysor, R.W. [Oak Ridge National Lab., TN (United States); Carnal, C.L. [Tennessee Technological Univ., Cookeville, TN (United States); Igou, R.E. [Oak Ridge Y-12 Plant, TN (United States)

1993-09-01T23:59:59.000Z

152

Cyber Incidents Involving Control Systems  

SciTech Connect

The Analysis Function of the US-CERT Control Systems Security Center (CSSC) at the Idaho National Laboratory (INL) has prepared this report to document cyber security incidents for use by the CSSC. The description and analysis of incidents reported herein support three CSSC tasks: establishing a business case; increasing security awareness and private and corporate participation related to enhanced cyber security of control systems; and providing informational material to support model development and prioritize activities for CSSC. The stated mission of CSSC is to reduce vulnerability of critical infrastructure to cyber attack on control systems. As stated in the Incident Management Tool Requirements (August 2005) ''Vulnerability reduction is promoted by risk analysis that tracks actual risk, emphasizes high risk, determines risk reduction as a function of countermeasures, tracks increase of risk due to external influence, and measures success of the vulnerability reduction program''. Process control and Supervisory Control and Data Acquisition (SCADA) systems, with their reliance on proprietary networks and hardware, have long been considered immune to the network attacks that have wreaked so much havoc on corporate information systems. New research indicates this confidence is misplaced--the move to open standards such as Ethernet, Transmission Control Protocol/Internet Protocol, and Web technologies is allowing hackers to take advantage of the control industry's unawareness. Much of the available information about cyber incidents represents a characterization as opposed to an analysis of events. The lack of good analyses reflects an overall weakness in reporting requirements as well as the fact that to date there have been very few serious cyber attacks on control systems. Most companies prefer not to share cyber attack incident data because of potential financial repercussions. Uniform reporting requirements will do much to make this information available to Department of Homeland Security (DHS) and others who require it. This report summarizes the rise in frequency of cyber attacks, describes the perpetrators, and identifies the means of attack. This type of analysis, when used in conjunction with vulnerability analyses, can be used to support a proactive approach to prevent cyber attacks. CSSC will use this document to evolve a standardized approach to incident reporting and analysis. This document will be updated as needed to record additional event analyses and insights regarding incident reporting. This report represents 120 cyber security incidents documented in a number of sources, including: the British Columbia Institute of Technology (BCIT) Industrial Security Incident Database, the 2003 CSI/FBI Computer Crime and Security Survey, the KEMA, Inc., Database, Lawrence Livermore National Laboratory, the Energy Incident Database, the INL Cyber Incident Database, and other open-source data. The National Memorial Institute for the Prevention of Terrorism (MIPT) database was also interrogated but, interestingly, failed to yield any cyber attack incidents. The results of this evaluation indicate that historical evidence provides insight into control system related incidents or failures; however, that the limited available information provides little support to future risk estimates. The documented case history shows that activity has increased significantly since 1988. The majority of incidents come from the Internet by way of opportunistic viruses, Trojans, and worms, but a surprisingly large number are directed acts of sabotage. A substantial number of confirmed, unconfirmed, and potential events that directly or potentially impact control systems worldwide are also identified. Twelve selected cyber incidents are presented at the end of this report as examples of the documented case studies (see Appendix B).

Robert J. Turk

2005-10-01T23:59:59.000Z

153

Automatic Control Technology in the HVAC System  

Science Journals Connector (OSTI)

In the field of VAV air-conditioning system (Variable Air Volume, VAV) control theory and practical study, the paper analyzed the methods used by the China's VAV control procedures including Static Pressure Control, Variable Pressure Control and Total ...

Ren Tao; Gao Jingmin; Jia Wenwen

2009-01-01T23:59:59.000Z

154

HVDC control developments - addressing system requirements  

SciTech Connect

This article describes typical high voltage direct current (HVDC) control systems and some of the new developments in the control area. HVDC control systems are showing their flexible characteristics as demonstrated, for example, by the new modulation, torsional damping, and alternating current voltage and reactive power controllers. Extensive studies are conducted to design and integrate such controllers into HVDC systems and to assure against any detrimental interactions within the total control system. 8 figures.

Hauth, R.L.; Patel, H.S.; Piwko, R.J.

1984-01-01T23:59:59.000Z

155

Heat engine generator control system  

DOE Patents (OSTI)

An electrical power generation system includes a heat engine having an output member operatively coupled to the rotor of a dynamoelectric machine. System output power is controlled by varying an electrical parameter of the dynamoelectric machine. A power request signal is related to an engine speed and the electrical parameter is varied in accordance with a speed control loop. Initially, the sense of change in the electrical parameter in response to a change in the power request signal is opposite that required to effectuate a steady state output power consistent with the power request signal. Thereafter, the electrical parameter is varied to converge the output member speed to the speed known to be associated with the desired electrical output power.

Rajashekara, Kaushik (Carmel, IN); Gorti, Bhanuprasad Venkata (Towson, MD); McMullen, Steven Robert (Anderson, IN); Raibert, Robert Joseph (Fishers, IN)

1998-01-01T23:59:59.000Z

156

Heat engine generator control system  

DOE Patents (OSTI)

An electrical power generation system includes a heat engine having an output member operatively coupled to the rotor of a dynamoelectric machine. System output power is controlled by varying an electrical parameter of the dynamoelectric machine. A power request signal is related to an engine speed and the electrical parameter is varied in accordance with a speed control loop. Initially, the sense of change in the electrical parameter in response to a change in the power request signal is opposite that required to effectuate a steady state output power consistent with the power request signal. Thereafter, the electrical parameter is varied to converge the output member speed to the speed known to be associated with the desired electrical output power. 8 figs.

Rajashekara, K.; Gorti, B.V.; McMullen, S.R.; Raibert, R.J.

1998-05-12T23:59:59.000Z

157

ETTP Security Access Control System (ESACS) | Department of Energy  

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

ETTP Security Access Control System (ESACS) ETTP Security Access Control System (ESACS) ETTP Security Access Control System (ESACS) ETTP Security Access Control System (ESACS) More...

158

Marathon pipe line's new control system  

SciTech Connect

A new control system for Marathon Pipe Line Company's 4200 mile long oil pipeline is described. The pipeline transports 1 1/2 million barrels/day of crude oil and refined products. A comprehensive, centralized computer control system in Findlay, Ohio was developed to provide precision control of the system. Marathon is almost finished with the supervisory control and data acquisition system which can almost instantaneously control fluid movements throughout the network with the push of a few buttons.

Ross, J.

1983-03-01T23:59:59.000Z

159

Recommended Security Controls for Federal Information Systems...  

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

NIST 800-53 Revision 3 + Draft Revision 4 Recommended Security Controls for Federal Information Systems and Organizations Note: CNTL NO. Table D2: Security Control Base Lines...

160

SP 800-82. Guide to Industrial Control Systems (ICS) Security: Supervisory Control and Data Acquisition (SCADA) systems, Distributed Control Systems (DCS), and other control system configurations such as Programmable Logic Controllers (PLC)  

Science Journals Connector (OSTI)

The purpose of this document is to provide guidance for securing industrial control systems (ICS), including supervisory control and data acquisition (SCADA) systems, distributed control systems (DCS), and other systems performing control functions. ... Keywords: Cyber-physcial systems, ICS, Industrial Control Systems, SCADA, Supervisory Control and Data Acquisition, security controls, threats, vulnerabilities

Keith A. Stouffer; Joseph A. Falco; Karen A. Scarfone

2011-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "daylighting control 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

Energy efficient commercial buildings : a study of natural daylighting in the context of adaptive reuse  

E-Print Network (OSTI)

Daylighting is a powerful design element which can have a dramatic impact on people's perception of space, physical and psychological well-being as well as a building's annual and daily energy requirements. Understanding ...

Crowley, John Stephen

1982-01-01T23:59:59.000Z

162

Energy, Shading and Daylighting Analysis for the Austin Bergstrom International Airport Terminal  

E-Print Network (OSTI)

Austin Airport included large glass areas for viewing arriving and departing planes, the sky, and the surrounding terrain. The glass was envisioned to provide quality natural lighting for the terminal during daylight hours in order to improve the quality...

Holder, L. M. III; Holder, L. M. IV

2002-01-01T23:59:59.000Z

163

An Analysis of Energy Reductions from the Use of Daylighting in Low-Cost Housing  

E-Print Network (OSTI)

to preserving natural resources and contribute to a solution for the worlds energy shortage problem. 1 .2 . OBJECTIVES The primary objective of this research is to evaluate the effectiveness of several daylighting design strategies applied to low... AN ANALYSIS OF ENERGY REDUCTIONS FROM THE USE OF DAYLIGHTING IN LOW-COST HOUSING A Thesis by NAYARAT RUNGCHAREONRAT Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements...

Rungchareonrat, N.

164

DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM  

SciTech Connect

The deep hard rock drilling environment induces severe vibrations into the drillstring, which can cause reduced rates of penetration (ROP) and premature failure of the equipment. The only current means of controlling vibration under varying conditions is to change either the rotary speed or the weight-on-bit (WOB). These changes often reduce drilling efficiency. Conventional shock subs are useful in some situations, but often exacerbate the problems. The objective of this project is development of a unique system to monitor and control drilling vibrations in a ''smart'' drilling system. This system has two primary elements: (1) The first is an active vibration damper (AVD) to minimize harmful axial, lateral and torsional vibrations. The hardness of this damper will be continuously adjusted using a robust, fast-acting and reliable unique technology. (2) The second is a real-time system to monitor drillstring vibration, and related parameters. This monitor adjusts the damper according to local conditions. In some configurations, it may also send diagnostic information to the surface via real-time telemetry. The AVD is implemented in a configuration using magnetorheological (MR) fluid. By applying a current to the magnetic coils in the damper, the viscosity of the fluid can be changed rapidly, thereby altering the damping coefficient in response to the measured motion of the tool. Phase I of this program entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype. Phase I of the project was completed by the revised end date of May 31, 2004. The objectives of this phase were met, and all prerequisites for Phase II have been completed.

Martin E. Cobern

2004-08-31T23:59:59.000Z

165

Question of the Week: How Do You Feel About the Extended Daylight Saving  

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

Feel About the Extended Daylight Feel About the Extended Daylight Saving Time? Question of the Week: How Do You Feel About the Extended Daylight Saving Time? March 12, 2009 - 6:00am Addthis Have you been drinking extra coffee this week? The spring switch to Daylight Saving Time can be rough-especially for those of us who aren't morning people-but that extra time in the afternoon sun sure is nice! The change took a few people by surprise-this is only the third year that Daylight Saving Time started the second Sunday in March, rather than the first Sunday in April. The Energy Policy Act of 2005 changed the start and end dates of Daylight Saving Time in order to save energy, and DOE has found that it worked. The savings from the shift, while small percentage-wise, are enough to power about 122,000 average U.S. homes for a year. See the article in EERE

166

OCTOBER 2013 IEEE CONTROL SYSTEMS MAGAZINE 23 PEOPLE IN CONTROL  

E-Print Network (OSTI)

papers and ten monographs in systems and control, unmanned systems, and financial market modeling served as an editor of SIAM Jour- nal on Control and Optimization, IEEE Transactions on Robotics Systems, and IEEE Transactions on Automation Science and Engineering, and on the program committees

Benmei, Chen

167

Sandia National Laboratories: power flow control system  

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

power flow control system ECIS-Princeton Power Systems, Inc.: Demand Response Inverter On March 19, 2013, in DETL, Distribution Grid Integration, Energy, Energy Surety, Facilities,...

168

Development of Building Automation and Control Systems  

E-Print Network (OSTI)

Johnson Controls, 70 in Automated Logic EIKON language, 42systems developed by Automated Logic. Similarly as shown in

Yang, Yang; Zhu, Qi; Maasoumy, Mehdi; Sangiovanni-Vincentelli, Alberto

2012-01-01T23:59:59.000Z

169

Operational Control of Electricity Supply Systems  

Science Journals Connector (OSTI)

... to develop, the common-diagram control system, which enables an almost unlimited number of substations, etc., to be controlled completely from one diagram and control panel, and is ... of an undertaking. It describes a wall-type system diagram which automatically indicates, which substations have changed conditions, and therefore the area involved in any disturbance. The system diagram ...

1945-09-22T23:59:59.000Z

170

IN TELLIGENT CONTROLLING SYSTEM OF AQUICULTURE ENVIRONMENT  

E-Print Network (OSTI)

network, Decoupling control 1. INTRODUCTION Aquiculture environment is a complex system engineering which, the PLC ,engineers stations and director #12;In telligent Controlling System of aquiculture Environment 3IN TELLIGENT CONTROLLING SYSTEM OF AQUICULTURE ENVIRONMENT Deshen Zhao ,*1 1 Department of Electric

Paris-Sud XI, Université de

171

DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM  

SciTech Connect

The objective of this program is to develop a system to both monitor the vibration of a bottomhole assembly, and to adjust the properties of an active damper in response to these measured vibrations. Phase I of this program, which entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype, was completed on May 31, 2004. The principal objectives of Phase II are: more extensive laboratory testing, including the evaluation of different feedback algorithms for control of the damper; design and manufacture of a field prototype system; and, testing of the field prototype in drilling laboratories and test wells. Work during this quarter centered on the rebuilding of the prototype using the improved valve design described in the last report. Most of the components have been received and assembly has begun. Testing is expected to resume in August. In April, a paper was presented at the American Association of Drilling Engineers National Technical Conference in Houston. The paper was well received, and several oilfield service and supply companies sent inquiries regarding commercial distribution of the system. These are currently being pursued, but none have yet been finalized.

Martin E. Cobern

2005-07-27T23:59:59.000Z

172

Fuzzy logic control and optimization system  

DOE Patents (OSTI)

A control system (300) for optimizing a power plant includes a chemical loop having an input for receiving an input signal (369) and an output for outputting an output signal (367), and a hierarchical fuzzy control system (400) operably connected to the chemical loop. The hierarchical fuzzy control system (400) includes a plurality of fuzzy controllers (330). The hierarchical fuzzy control system (400) receives the output signal (367), optimizes the input signal (369) based on the received output signal (367), and outputs an optimized input signal (369) to the input of the chemical loop to control a process of the chemical loop in an optimized manner.

Lou, Xinsheng (West Hartford, CT)

2012-04-17T23:59:59.000Z

173

Control Systems Security Standards: Accomplishments And Impacts |  

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

Control Systems Security Standards: Accomplishments And Impacts Control Systems Security Standards: Accomplishments And Impacts Control Systems Security Standards: Accomplishments And Impacts This report describes the accomplishments and impacts of the standards team towards achieving these three goals and describes the follow-on efforts that need to be made toward meeting the priority strategies defined in the DOE/DHS Roadmap to Secure Control Systems in the Energy Sector. Control Systems Security Standards: Accomplishments & Impacts More Documents & Publications A Summary of Control System Security Standards Activities in the Energy Sector (October 2005) Roadmap to Secure Control Systems in the Energy Sector 2006 - Presentation to the 2008 ieRoadmap Workshop DOE/OE National SCADA Test Bed Fiscal Year 2009 Work Plan

174

Downhole Vibration Monitoring & Control System  

SciTech Connect

The objective of this program is to develop a system to both monitor the vibration of a bottomhole assembly, and to adjust the properties of an active damper in response to these measured vibrations. Phase I of this program, which entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype, was completed on May 31, 2004. The principal objectives of Phase II were: more extensive laboratory testing, including the evaluation of different feedback algorithms for control of the damper; design and manufacture of a field prototype system; and, testing of the field prototype in a drilling laboratory. Phase II concluded on January 31, 2006, and the Phase II final report was issued. Work on Phase III of the project began during the first quarter, 2006. Efforts the current quarter have continued to focus on the manufacture of the prototype and precommercial parts, field test planning and commercialization. The continued extreme lead times quoted by oilfield machine shops for collar components significantly delayed the deployment of the prototype and precommercial units. All parts have now been received for two units, and all but one for the third. Mechanical assembly of the first two systems is complete and the electronics installation and laboratory testing will be finished in April. We have entered into a Memorandum of Understanding with a major US oilfield equipment supplier, which calls for their assisting with our field tests, in cash and in kind. We are close to signing a definitive agreement which includes the purchase of the three precommercial units. We had also signed a CRADA with the Rocky Mountain Oilfield Test Center (RMOTC), and scheduled a test at their site, The RMOTC drilling schedule continues to slip, and the test cannot begin until the first week of May. Based on these factors, we have requested a no-cost extension to July 31, 2007.

Martin E. Cobern

2007-03-31T23:59:59.000Z

175

Wireless Control Systems:Wireless Control Systems: Scientific Challenges andScientific Challenges and  

E-Print Network (OSTI)

Wireless Control Systems:Wireless Control Systems: Scientific Challenges andScientific Challenges and Emerging ApplicationsEmerging Applications Karl Henrik Johansson School of Electrical Engineering Royal, Greece 27-29 Jun, 2007 © Karl H. Johansson, Wireless control Acknowledgements

Johansson, Karl Henrik

176

Refurbishment program of HANARO control computer system  

SciTech Connect

HANARO, an open-tank-in-pool type research reactor with 30 MW thermal power, achieved its first criticality in 1995. The programmable controller system MLC (Multi Loop Controller) manufactured by MOORE has been used to control and regulate HANARO since 1995. We made a plan to replace the control computer because the system supplier no longer provided technical support and thus no spare parts were available. Aged and obsolete equipment and the shortage of spare parts supply could have caused great problems. The first consideration for a replacement of the control computer dates back to 2007. The supplier did not produce the components of MLC so that this system would no longer be guaranteed. We established the upgrade and refurbishment program in 2009 so as to keep HANARO up to date in terms of safety. We designed the new control computer system that would replace MLC. The new computer system is HCCS (HANARO Control Computer System). The refurbishing activity is in progress and will finish in 2013. The goal of the refurbishment program is a functional replacement of the reactor control system in consideration of suitable interfaces, compliance with no special outage for installation and commissioning, and no change of the well-proved operation philosophy. HCCS is a DCS (Discrete Control System) using PLC manufactured by RTP. To enhance the reliability, we adapt a triple processor system, double I/O system and hot swapping function. This paper describes the refurbishment program of the HANARO control system including the design requirements of HCCS. (authors)

Kim, H. K.; Choe, Y. S.; Lee, M. W.; Doo, S. K.; Jung, H. S. [Korea Atomic Energy Research Inst., 989-111 Daedeok-daero, Yuseong, Daejeon, 305-353 (Korea, Republic of)

2012-07-01T23:59:59.000Z

177

AUTONOMOUS CONTROL SYSTEMS: ARCHITECTURE AND FUNDAMENTAL ISSUES  

E-Print Network (OSTI)

WP7 2:00 AUTONOMOUS CONTROL SYSTEMS: ARCHITECTURE AND FUNDAMENTAL ISSUES PJ. Antsaklis, KLM PassinD Dqt ofEecuical an Cmnpua Enge Univasity ofNotr Due Notr Dame, IN14655 ABSTRACT Autonomous control Autonomous control systems must perform well under signifit uncertainties in te plant and the envionment

Antsaklis, Panos

178

DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM  

SciTech Connect

The objective of this program is to develop a system to both monitor the vibration of a bottomhole assembly, and to adjust the properties of an active damper in response to these measured vibrations. Phase I of this program, which entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype, was completed on May 31, 2004. The principal objectives of Phase II are: more extensive laboratory testing, including the evaluation of different feedback algorithms for control of the damper; design and manufacture of a field prototype system; and, testing of the field prototype in drilling laboratories and test wells. As a result of the lower than expected performance of the MR damper noted last quarter, several additional tests were conducted. These dealt with possible causes of the lack of dynamic range observed in the testing: additional damping from the oil in the Belleville springs; changes in properties of the MR fluid; and, residual magnetization of the valve components. Of these, only the last was found to be significant. By using a laboratory demagnetization apparatus between runs, a dynamic range of 10:1 was achieved for the damper, more than adequate to produce the needed improvements in drilling. Additional modeling was also performed to identify a method of increasing the magnetic field in the damper. As a result of the above, several changes were made in the design. Additional circuitry was added to demagnetize the valve as the field is lowered. The valve was located to above the Belleville springs to reduce the load placed upon it and offer a greater range of materials for its construction. In addition, to further increase the field strength, the coils were relocated from the mandrel to the outer housing. At the end of the quarter, the redesign was complete and new parts were on order. The project is approximately three months behind schedule at this time.

Martin E. Cobern

2005-04-27T23:59:59.000Z

179

Safe controllers design for industrial automation systems  

Science Journals Connector (OSTI)

The design of safe industrial controllers is one of the most important domains related to Automation Systems research. To support it, synthesis and analysis techniques are available. Among the analysis techniques, two of the most important are Simulation ... Keywords: Formal verification, Industrial systems behaviour modelling, Real-time systems, Safe controllers, Simulation

Jos Machado; Eurico Seabra; Jos C. Campos; Filomena Soares; Celina P. Leo

2011-05-01T23:59:59.000Z

180

Effect of daylight saving time on lighting energy use: A literature review  

Science Journals Connector (OSTI)

The principal reason for introducing (and extending) daylight saving time (DST) was, and still is, projected energy savings, particularly for electric lighting. This paper presents a literature review concerning the effects of DST on energy use. Simple estimates suggest a reduction in national electricity use of around 0.5%, as a result of residential lighting reduction. Several studies have demonstrated effects of this size based on more complex simulations or on measured data. However, there are just as many studies that suggest no effect, and some studies suggest overall energy penalties, particularly if gasoline consumption is accounted for. There is general consensus that DST does contribute to an evening reduction in peak demand for electricity, though this may be offset by an increase in the morning. Nevertheless, the basic patterns of energy use, and the energy efficiency of buildings and equipment have changed since many of these studies were conducted. Therefore, we recommend that future energy policy decisions regarding changes to DST be preceded by high-quality research based on detailed analysis of prevailing energy use, and behaviours and systems that affect energy use. This would be timely, given the extension to DST underway in North America in 2007.

Myriam B.C. Aries; Guy R. Newsham

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "daylighting control 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

The evolution of the ISOLDE control system  

E-Print Network (OSTI)

The ISOLDE on-line mass separator facility is operating on a Personal Computer based control system since spring 1992. Front End Computers accessing the hardware are controlled from consoles running Microsoft WindowsTM through a Novell NetWare4TM local area network. The control system is transparently integrated in the CERN wide office network and makes heavy use of the CERN standard office application programs to control and to document the running of the ISOLDE isotope separators. This paper recalls the architecture of the control system, shows its recent developments and gives some examples of its graphical user interface.

Jonsson, O C; Deloose, I; Drumm, P V; Evensen, A H M; Gase, K; Focker, G J; Fowler, A B; Kugler, E; Lettry, Jacques; Olesen, G; Ravn, H L

1997-01-01T23:59:59.000Z

182

Control system for fluid heated steam generator  

DOE Patents (OSTI)

A control system for controlling the location of the nucleate-boiling region in a fluid heated steam generator comprises means for measuring the temperature gradient (change in temperature per unit length) of the heating fluid along the steam generator; means for determining a control variable in accordance with a predetermined function of temperature gradients and for generating a control signal in response thereto; and means for adjusting the feedwater flow rate in accordance with the control signal.

Boland, J.F.; Koenig, J.F.

1984-05-29T23:59:59.000Z

183

Instrumentation, Control and Intelligent Systems  

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

for any application that requires monitoring, control, and human interaction. External peer review and advisory committees made up of academic, R&D, and customer organizations...

184

Install an Automatic Blowdown-Control System  

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

This steam tip sheet on installing automatic blowdown controls provide how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.

185

CONTROL SYSTEM FOR SOLAR HEATING and COOLING  

E-Print Network (OSTI)

sensors and control valves used in our generalized experimental system. The experimental solarsensors are remotely located at critical (in terms of decision-making) locations in the solar

Dols, C.

2010-01-01T23:59:59.000Z

186

Laser Inertial Fusion Energy Control Systems  

SciTech Connect

A Laser Inertial Fusion Energy (LIFE) facility point design is being developed at LLNL to support an Inertial Confinement Fusion (ICF) based energy concept. This will build upon the technical foundation of the National Ignition Facility (NIF), the world's largest and most energetic laser system. NIF is designed to compress fusion targets to conditions required for thermonuclear burn. The LIFE control systems will have an architecture partitioned by sub-systems and distributed among over 1000's of front-end processors, embedded controllers and supervisory servers. LIFE's automated control subsystems will require interoperation between different languages and target architectures. Much of the control system will be embedded into the subsystem with well defined interface and performance requirements to the supervisory control layer. An automation framework will be used to orchestrate and automate start-up and shut-down as well as steady state operation. The LIFE control system will be a high parallel segmented architecture. For example, the laser system consists of 384 identical laser beamlines in a 'box'. The control system will mirror this architectural replication for each beamline with straightforward high-level interface for control and status monitoring. Key technical challenges will be discussed such as the injected target tracking and laser pointing feedback. This talk discusses the the plan for controls and information systems to support LIFE.

Marshall, C; Carey, R; Demaret, R; Edwards, O; Lagin, L; Van Arsdall, P

2011-03-18T23:59:59.000Z

187

Wind Power System Simulation of Switch Control  

Science Journals Connector (OSTI)

In order to find a balance between energy efficiency and reliability of wind power generation system, this paper presents a ... switch control strategy. This paper establishes a wind power system simulation model...

Yuehua Huang; Guangxu Li; Huanhuan Li

2014-01-01T23:59:59.000Z

188

The Role of Daylight in Achieving Ultra-Low-Energy Buildings  

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

Daylight in Achieving Daylight in Achieving Ultra-Low-Energy Buildings May 6, 2011 Neall Digert, Ph.D., MIES Vice President of Product Enterprise Solatube International, Inc. Countries around the globe are experiencing an energy crisis! The World's enormous design and construction market is focused on energy-efficient retrofit and innovative, ultra-low energy new construction. The desire to halt global warming is creating an awareness and need for sustainable buildings, communities, and societies. Energy Policy is at the forefront of governmental initiatives in nearly every country. China needs to increase its generation capacity by over 1,312 GW between 2006 and 2030. Source: International Energy Agency, "World

189

3 - How Electronic Access Control Systems Work  

Science Journals Connector (OSTI)

Publisher Summary This chapter focuses on Electronic Access Control Systems concepts and how they work. These systems comprise electronic elements, physical elements, operational elements, and logical elements to create a complete working system that facilitates rapid and reliable access to authorized users in a facility at minimum long-term cost to the organization. They are digital networks that control access to security portals. A security portal is an entry into or out of a security boundary. Most Electronic Access Control Systems also function as an intrusion alarm system. From this point forward, it assumes that the systems have an alarm system element. Electronic Access Control Systems comprise field equipment, decision modules, a communications network, one or more databases, and one or more human interface terminals. The most obvious elements of an Electronic Access Control System are the Field Elements: Access Control System Portals (for pedestrians or vehicles), alarm sensors, and any controlled devices such as roll-up doors and lights. This chapter is about Electronic Access Control Systems concepts and how they work. It is important to read this chapter very carefully and be certain that you understand everything in it. Go over the Chapter Objectives and the Chapter Summary. Everything else you read in this book is based on the material in this chapter. Electronic Access Control Systems comprise electronic elements, physical elements, operational elements, and logical elements to create a complete working system that facilitates rapid and reliable access to authorized users in a facility at minimum long-term cost to the organization. This book is written in a hierarchical fashion; that is, the concepts are related first and then expanded on in greater detail later in the book. Accordingly, you will see repetition throughout the book, but that repetition is designed to instill learning in a layered fashion. Author Information: Thomas L. Norman, CPP, PSP, CSC, Executive Vice President, Protection Partners International

Thomas Norman

2012-01-01T23:59:59.000Z

190

A Systems Integration Approach To Lighting Control Systems  

E-Print Network (OSTI)

and office placement with control tools to harvest natural light. Other technologies under development seek to achieve the seamless integration of lighting controls with other building systems. Here, the rewards can be rich, with increased energy savings...

Lynch, S.; Renner, R. A.

2000-01-01T23:59:59.000Z

191

Modeling Control Mechanisms with Normative Multiagent Systems  

E-Print Network (OSTI)

. This paper is about control mechanisms for virtual organizations. As a case study, we discuss the Renewables of renewable energy. We apply a conceptual model based on normative multiagent systems (NMAS). We proposeModeling Control Mechanisms with Normative Multiagent Systems: the Case of the Renewables

van der Torre, Leon

192

Boiler Combustion Control and Monitoring System  

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

Efficiency of existing boilers can be improved in three ways; replacement with new boilers, replacement of the burner, or installation of a combustion control system. While installation of a new boiler or replacement of the burner can lead to the greatest efficiency gains, the higher costs associated with these measures typically leads to longer payback periods than combustion control systems.

193

Modeling of Lean Exhaust Emissions Control Systems | Department...  

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

Lean Exhaust Emissions Control Systems Modeling of Lean Exhaust Emissions Control Systems 2002 DEER Conference Presentation: National Renewable Energy Laboratory...

194

Prerequisites: Control Systems I+II, System Modeling, Engine Class (Introduction to Modeling and Control of  

E-Print Network (OSTI)

Thesis IDSC-LG-FZ-05 Gas Diesel Engine Modeling and Control The gas diesel engine is a natural gas enginePrerequisites: Control Systems I+II, System Modeling, Engine Class (Introduction to Modeling and Control of Internal Combustion Engine Systems, IC Engines, ...), Optimization Course, Matlab

Lygeros, John

195

Coordinated Control of HVAC Systems  

E-Print Network (OSTI)

This paper describes the development of new control logic for starting and stopping energy-intensive equipment in buildings such as staged air-conditioning units. The concept is to use pulse-width modulation (PWM) instead of level-crossing logic. A...

Federspiel, C.; Lanning, S. D.; Li, H.; Auslander, D. M.

2001-01-01T23:59:59.000Z

196

Robust adaptive control of HVDC systems  

SciTech Connect

The transient performance of an HVDC power system is highly dependent on the parameters of the current/voltage regulators of the converter controls. In order to better accommodate changes in system structure or dc operating conditions, this paper introduces a new adaptive control strategy. The advantages of automatic tuning for continuous fine tuning are combined with predetermined gain scheduling in order to achieve robustness for large disturbances. Examples are provided for a digitally simulated back-to-back dc system.

Reeve, J.; Sultan, M. (Univ. of Waterloo, Ontario (Canada))

1994-07-01T23:59:59.000Z

197

Ambient Control Systems | Open Energy Information  

Open Energy Info (EERE)

Control Systems Control Systems Jump to: navigation, search Logo: Ambient Control Systems Name Ambient Control Systems Address 1810 Gillespie Way Place El Cajon, California Zip 92020 Sector Solar Product Solar energy device with a computerized energy management Website http://www.ambientalert.com/ma Coordinates 32.8193566°, -116.981232° 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":32.8193566,"lon":-116.981232,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

198

Feedwater temperature control methods and systems  

DOE Patents (OSTI)

A system for controlling the power level of a natural circulation boiling water nuclear reactor (NCBWR) is disclosed. The system, in accordance with an example embodiment of the present invention, may include a controller configured to control a power output level of the NCBWR by controlling a heating subsystem to adjust a temperature of feedwater flowing into an annulus of the NCBWR. The heating subsystem may include a steam diversion line configured to receive steam generated by a core of the NCBWR and a steam bypass valve configured to receive commands from the controller to control a flow of the steam in the steam diversion line, wherein the steam received by the steam diversion line has not passed through a turbine. Additional embodiments of the invention may include a feedwater bypass valve for controlling an amount of flow of the feedwater through a heater bypass line to the annulus.

Moen, Stephan Craig; Noonan, Jack Patrick; Saha, Pradip

2014-04-22T23:59:59.000Z

199

Building systems optimization controls calibration  

SciTech Connect

During the period between May 9, 1994 and June 2, 1994, Engineered Facility Management (EFM) conducted a comprehensive investigation into the condition and operation of the equipment and systems at a major high-rise building owned by a large California bank. The goal of the project was to improve the project`s energy cost per square foot without major system retrofit and capital expenditure. This report is a compilation of the findings, actions taken and recommendations.

NONE

1995-02-01T23:59:59.000Z

200

THEBLACKMARBLE In daylight our big blue marble is all land, oceans and  

E-Print Network (OSTI)

THEBLACKMARBLE #12;In daylight our big blue marble is all land, oceans and clouds. But the night ­ is electric. These views of Earth's city lights show brightly shining cities, connected by illuminated webs at night is a composite of data acquired over nine days in April and thirteen days in October 2012

Note: This page contains sample records for the topic "daylighting control 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

SHORTENING DAYLIGHT PERIODS BETWEEN MAY 15 AND SEPTEMBER 12 AND THE PELT CYCLE OF THE MINK  

Science Journals Connector (OSTI)

...light on the hypophysis - Effects of long-continued night lighting' on hypophysectomized female ferrets and those with optic...elsewhere in the near future. CHEONG-YIN WONG DEPARTMENT O HORTICuLTuRE, MICHIGAN STATE COLLEGE SHORTENING DAYLIGHT PERIODS BE-TWEEN...

Thomas Hume Bissonnette; Everett Wilson

1939-05-05T23:59:59.000Z

202

SunCast: Fine-grained Prediction of Natural Sunlight Levels for Improved Daylight Harvesting  

E-Print Network (OSTI)

Artificial lighting is the single largest energy consumer in commercial buildings, accounting for 26% of their total energy usage [1]. Daylight harvesting is the approach of us- ing natural sunlight inside promise for commercial buildings because they are Permission to make digital or hard copies of all or part

Whitehouse, Kamin

203

An intelligent CNC machine control system architecture  

SciTech Connect

Intelligent, agile manufacturing relies on automated programming of digitally controlled processes. Currently, processes such as Computer Numerically Controlled (CNC) machining are difficult to automate because of highly restrictive controllers and poor software environments. It is also difficult to utilize sensors and process models for adaptive control, or to integrate machining processes with other tasks within a factory floor setting. As part of a Laboratory Directed Research and Development (LDRD) program, a CNC machine control system architecture based on object-oriented design and graphical programming has been developed to address some of these problems and to demonstrate automated agile machining applications using platform-independent software.

Miller, D.J.; Loucks, C.S.

1996-10-01T23:59:59.000Z

204

LNG fire and vapor control system technologies  

SciTech Connect

This report provides a review of fire and vapor control practices used in the liquefied natural gas (LNG) industry. Specific objectives of this effort were to summarize the state-of-the-art of LNG fire and vapor control; define representative LNG facilities and their associated fire and vapor control systems; and develop an approach for a quantitative effectiveness evaluation of LNG fire and vapor control systems. In this report a brief summary of LNG physical properties is given. This is followed by a discussion of basic fire and vapor control design philosophy and detailed reviews of fire and vapor control practices. The operating characteristics and typical applications and application limitations of leak detectors, fire detectors, dikes, coatings, closed circuit television, communication systems, dry chemicals, water, high expansion foam, carbon dioxide and halogenated hydrocarbons are described. Summary descriptions of a representative LNG peakshaving facility and import terminal are included in this report together with typical fire and vapor control systems and their locations in these types of facilities. This state-of-the-art review identifies large differences in the application of fire and vapor control systems throughout the LNG industry.

Konzek, G.J.; Yasutake, K.M.; Franklin, A.L.

1982-06-01T23:59:59.000Z

205

Underground ventilation remote monitoring and control system  

SciTech Connect

This paper presents the design and installation of an underground ventilation remote monitoring and control system at the Waste Isolation Pilot Plant. This facility is designed to demonstrate safe underground disposal of U.S. defense generated transuranic nuclear waste. To improve the operability of the ventilation system, an underground remote monitoring and control system was designed and installed. The system consists of 15 air velocity sensors and 8 differential pressure sensors strategically located throughout the underground facility providing real-time data regarding the status of the ventilation system. In addition, a control system was installed on the main underground air regulators. The regulator control system gives indication of the regulator position and can be controlled either locally or remotely. The sensor output is displayed locally and at a central surface location through the site-wide Central Monitoring System (CMS). The CMS operator can review all sensor data and can remotely operate the main underground regulators. Furthermore, the Virtual Address Extension (VAX) network allows the ventilation engineer to retrieve real-time ventilation data on his personal computer located in his workstation. This paper describes the types of sensors selected, the installation of the instrumentation, and the initial operation of the remote monitoring system.

Strever, M.T.; Wallace, K.G. Jr.; McDaniel, K.H.

1995-12-31T23:59:59.000Z

206

Spatial xenon oscillation control with expert systems  

SciTech Connect

Spatial power oscillations were attributed to the xenon transients in a reactor core in 1958 by Randall and St. John. These transients are usually initiated by a local reactivity insertion and lead to divergent axial flux oscillations in the core at constant power. Several heuristic manual control strategies and automatic control methods were developed to damp the xenon oscillations at constant power operations. However, after the load-follow operation of the reactors became a necessity of life, a need for better control strategies arose. Even though various advanced control strategies were applied to solve the xenon oscillation control problem for the load-follow operation, the complexity of the system created difficulties in modeling. The strong nonlinearity of the problem requires highly sophisticated analytical approaches that are quite inept for numerical solutions. On the other hand, the complexity of a system and heuristic nature of the solutions are the basic reasons for using artificial intelligence techniques such as expert systems.

Alten, S. (Turkish Atomic Energy Authority, Ankara (Turkey)); Danofsky, R.A. (Iowa State Univ., Ames, IA (United States))

1993-01-01T23:59:59.000Z

207

Moving mass trim control system design  

SciTech Connect

This paper describes the design of a moving mass trim control system for maneuvering axisymmetric reentry vehicles. The moving mass trim controller is composed of three equal masses that are independently positioned in order to deliver a desired center of mass position. For a slowly spinning reentry vehicle, the mass offset creates a trim angle-of-attack to generate modest flight path corrections. The control system must maintain the desired position of each mass in the face of large disturbances. A novel algorithm for determining the desired mass positions is developed in conjunction with a preliminary controller design. The controller design is based on classical frequency domain techniques where a bound on the disturbance magnitude is used to formulate the disturbance rejection problem. Simulation results for the controller are presented for a typical reentry vehicle.

Byrne, R.H.; Robinett, R.D.; Sturgis, B.R.

1996-03-01T23:59:59.000Z

208

Variable emissivity laser thermal control system  

DOE Patents (OSTI)

A laser thermal control system for a metal vapor laser maintains the wall mperature of the laser at a desired level by changing the effective emissivity of the water cooling jacket. This capability increases the overall efficiency of the laser.

Milner, Joseph R. (Livermore, CA)

1994-01-01T23:59:59.000Z

209

Artificial Immune System based urban traffic control  

E-Print Network (OSTI)

Borrowing ideas from natural immunity, Artificial Immune Systems (AIS) offer a novel approach to solving many diagnosis, optimization and control problems. In the course of this research this paradigm was applied to the problem of optimizing urban...

Negi, Pallav

2007-09-17T23:59:59.000Z

210

CONTROL SYSTEM FOR SOLAR HEATING and COOLING  

E-Print Network (OSTI)

Solar Energy Society Meeting, Los Angeles, California, Julysolar in- solation measuring stations in northern and central California (California 94720 August 1975 A control system is being developed that will be capable of operating solar

Dols, C.

2010-01-01T23:59:59.000Z

211

A Robust Model Control for Dynamic Systems  

Science Journals Connector (OSTI)

Analytical methods of polynomial algebra, heuristic techniques, and digital modeling are used to study the robustness domain of linear dynamic systems with model inputoutput controllers as a function of the mutual locations of zeros ...

S. V. Tararykin; V. V. Tyutikov

2002-05-01T23:59:59.000Z

212

DOE and Industry Showcase New Control Systems Security Technologies...  

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

Technology Development Energy Delivery Systems Cybersecurity Control Systems Security News Archive DOE and Industry Showcase New Control Systems Security Technologies at...

213

Software Quality Assurance Control of Existing Systems | Department...  

Office of Environmental Management (EM)

Software Quality Assurance Control of Existing Systems Software Quality Assurance Control of Existing Systems Existing software systems often represent significant investments and...

214

JFE Electrical and Control Systems | Open Energy Information  

Open Energy Info (EERE)

Systems Jump to: navigation, search Name: JFE Electrical and Control Systems Place: Japan Product: Electronic power, automation and control systems maker which also makes PV...

215

NSTX Synchronization System Block Diagram Control Room  

E-Print Network (OSTI)

NSTX Synchronization System Block Diagram Clock Rack Control Room Junction Area MG FCPCRF Cage Test Cell West Patch Rack Test Cell East Patch Rack Darm Patch Rack CAMAC Crate CAMAC Crate CAMAC Crate' Level, and RF Balcony O 1,230 ft. 1.88 µsec Optic Rack 100 Control Room E 100 ft. .15µsec O 525 ft. .8

Princeton Plasma Physics Laboratory

216

Adaptive excitation control in power systems  

E-Print Network (OSTI)

control input pu? and output gE? , we have puBxAx ?+?=? ? (2.25) xig ? (2.26) where ?? ? ?? ? ?== 6667 2 rJA , ?? ? ?? ?= 67 0 iB , [ ]08213.1=C 32....38) or puBxAx ?+?=? ? (2.39) xip ? (2.40) where p is a measurable output and iii C are uncertain system parameters. In the Chapter IV, we apply our adaptive control approaches to the real DAE system. We...

Chiu, Pei-Chen

2006-08-16T23:59:59.000Z

217

Extremal properties of interval control systems  

E-Print Network (OSTI)

EXTREMAL PROPERTIES OF INTERVAL CONTROL SYSTEMS A Thesis by FARIS RAGHEB KAMAL Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1991 Major... Subject: Electrical Engineering EXTREMAL PROPERTIES OF INTERVAL CONTROL SYSTEMS A Thesis by FARIS RAGHEB I&AMAL Approved as to style and content b1 Mohammed A. Dahleh (Chair of Committee) ostas Georghiades (Member ) Ehsani Mehrdad (Member...

Kamal, Faris Ragheb

2012-06-07T23:59:59.000Z

218

LED lamp color control system and method  

SciTech Connect

An LED lamp color control system and method including an LED lamp having an LED controller 58; and a plurality of LED channels 60 operably connected to the LED controller 58, each of the plurality of LED channels 60 having a channel switch 62 in series with at least one shunted LED circuit 83, the shunted LED circuit 83 having a shunt switch 68 in parallel with an LED source 80. The LED controller 58 determines whether the LED source 80 is in a feedback controllable range, stores measured optical flux for the LED source 80 when the LED source 80 is in the feedback controllable range, and bypasses storing the measured optical flux when the LED source 80 is not in the feedback controllable range.

Gaines, James; Clauberg, Bernd; Van Erp, Josephus A.M.

2013-02-05T23:59:59.000Z

219

Secure control systems with application to cyber-physical systems  

SciTech Connect

Control systems are computer-based systems with networked units consisting of sensors, actuators, control processing units, and communication devices. The role of control system is to interact, monitor, and control physical processes. Reactive power control is a fundamental issue in ensuring the security of the power network. It is claimed that Synchronous Condensers (SC) have been used at both distribution and transmission voltage levels to improve stability and to maintain voltages within desired limits under changing load conditions and contingency situations. Performance of PI controller corresponding to various tripping faults are analyzed for SC systems. Most of the eort in protecting these systems has been in protection against random failures or reliability. However, besides failures these systems are subject to various signal attacks for which new analysis are discussed here. When a breach does occur, it is necessary to react in a time commensurate with the physical dynamics of the system as it responds to the attack. Failure to act swiftly enough may result in undesirable, and possibly irreversible, physical eects. Therefore, it is meaningful to evaluate the security of a cyber-physical system, especially to protect it from cyber-attack. Illustrative numerical examples are provided together with an application to the SC systems.

Dong, Jin [ORNL] [ORNL; Djouadi, Seddik M [ORNL] [ORNL; Nutaro, James J [ORNL] [ORNL; Kuruganti, Phani Teja [ORNL] [ORNL

2014-01-01T23:59:59.000Z

220

Stability analysis and controller synthesis for hybrid dynamical systems  

Science Journals Connector (OSTI)

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

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "daylighting control 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

Side-by-Side Testing of Commercial Office Lighting Systems: Two-lamp Fluorescent Fixtures  

E-Print Network (OSTI)

. Guide to Performance Evaluation of Efficient Lighting Products, Lighting Research Center, Rensselaer Polytechnic Institute, Troy, NY. IES, 1987. IES Lighting Handbook: 1987 Ap~lications Volume, Illuminating Engineering Society of North America, New... Transactions on Industrv A~plications, No. 5, pp. 1189-1 197. Verderber, R.R. and Rubinstein, F.M. and Ward, G., 1989. Photoelectric Control of Daylight Following Lighting Systems, CU- 6243, Electric Power Research Institute, Palo Alto, CA. Rubinstein, F...

Parker, D. S.; Schrum, L.; Sonne, J. K.; Stedman, T. C.

1996-01-01T23:59:59.000Z

222

Alarm system for a nuclear control complex  

DOE Patents (OSTI)

An advanced control room complex for a nuclear power plant, including a discrete indicator and alarm system (72) which is nuclear qualified for rapid response to changes in plant parameters and a component control system (64) which together provide a discrete monitoring and control capability at a panel (14-22, 26, 28) in the control room (10). A separate data processing system (70), which need not be nuclear qualified, provides integrated and overview information to the control room and to each panel, through CRTs (84) and a large, overhead integrated process status overview board (24). The discrete indicator and alarm system (72) and the data processing system (70) receive inputs from common plant sensors and validate the sensor outputs to arrive at a representative value of the parameter for use by the operator during both normal and accident conditions, thereby avoiding the need for him to assimilate data from each sensor individually. The integrated process status board (24) is at the apex of an information hierarchy that extends through four levels and provides access at each panel to the full display hierarchy. The control room panels are preferably of a modular construction, permitting the definition of inputs and outputs, the man machine interface, and the plant specific algorithms, to proceed in parallel with the fabrication of the panels, the installation of the equipment and the generic testing thereof.

Scarola, Kenneth (Windsor, CT); Jamison, David S. (Windsor, CT); Manazir, Richard M. (North Canton, CT); Rescorl, Robert L. (Vernon, CT); Harmon, Daryl L. (Enfield, CT)

1994-01-01T23:59:59.000Z

223

Security Controls for Unclassified Information Systems Manual  

Directives, Delegations, and Requirements

The Manual establishes minimum implementation standards for cyber security technical, management, and operational controls that will be followed in all information systems operated by DOE and the information systems. Does not cancel other directives. Canceled by DOE O 205.1B

2009-01-05T23:59:59.000Z

224

Security Controls for Unclassified Information Systems Manual  

Directives, Delegations, and Requirements

The Manual establishes minimum implementation standards for cyber security technical, management, and operational controls that will be followed in all information systems operated by DOE and the information systems. Admin Chg 1 dated 9-1-09; Admin Chg 2 dated 12-22-09. Canceled by DOE O 205.1B.

2009-01-05T23:59:59.000Z

225

Security Controls for Unclassified Information Systems Manual  

Directives, Delegations, and Requirements

The Manual establishes minimum implementation standards for cyber security technical, management, and operational controls that will be followed in all information systems operated by DOE and the information systems. Admin Chg 1 dated 9-1-09. Canceled by DOE O 205.1B.

2009-01-05T23:59:59.000Z

226

Waste receiving and processing plant control system; system design description  

SciTech Connect

The Plant Control System (PCS) is a heterogeneous computer system composed of numerous sub-systems. The PCS represents every major computer system that is used to support operation of the Waste Receiving and Processing (WRAP) facility. This document, the System Design Description (PCS SDD), includes several chapters and appendices. Each chapter is devoted to a separate PCS sub-system. Typically, each chapter includes an overview description of the system, a list of associated documents related to operation of that system, and a detailed description of relevant system features. Each appendice provides configuration information for selected PCS sub-systems. The appendices are designed as separate sections to assist in maintaining this document due to frequent changes in system configurations. This document is intended to serve as the primary reference for configuration of PCS computer systems. The use of this document is further described in the WRAP System Configuration Management Plan, WMH-350, Section 4.1.

LANE, M.P.

1999-02-24T23:59:59.000Z

227

Performance estimates for personnel access control systems  

SciTech Connect

Current performance estimates for personnel access control systems use estimates of Type I and Type II verification errors. A system performance equation which addresses normal operation, the insider, and outside adversary attack is developed. Examination of this equation reveals the inadequacy of classical Type I and II error evaluations which require detailed knowledge of the adversary threat scenario for each specific installation. Consequently, new performance measures which are consistent with the performance equation and independent of the threat are developed as an aid in selecting personnel access control systems.

Bradley, R. G.

1980-10-01T23:59:59.000Z

228

Distributed computer controls for accelerator systems  

SciTech Connect

A distributed control system has been designed and installed at the Lawrence Livermore National Laboratory Multi-user Tandem Facility using an extremely modular approach in hardware and software. The two tiered, geographically organized design allowed total system implementation with four months with a computer and instrumentation cost of approximately $100K. Since the system structure is modular, application to a variety of facilities is possible. Such a system allows rethinking and operational style of the facilities, making possible highly reproducible and unattended operation. The impact of industry standards, i.e., UNIX, CAMAC, and IEEE-802.3, and the use of a graphics-oriented controls software suite allowed the efficient implementation of the system. The definition, design, implementation, operation and total system performance will be discussed. 3 refs.

Moore, T.L.

1988-09-01T23:59:59.000Z

229

Effective Daylighting: Evaluating Daylighting Performance in the San Francisco Federal Building from the Perspective of Building Occupants  

E-Print Network (OSTI)

integrated, and green design 11 Figure 2.1 Environmental control functions performed by the buildingbuilding as a model of high performance, integrated, and green design.Design and Evaluation of integrated envelope and lighting control strategies for commercial buildings.

Konis, Kyle Stas

2012-01-01T23:59:59.000Z

230

Effective Daylighting: Evaluating Daylighting Performance in the San Francisco Federal Building from the Perspective of Building Occupants  

E-Print Network (OSTI)

integrated, and green design 11 Figure 2.1 Environmental control functions performed by the buildingbuilding as a model of high performance, integrated, and green design.Design and Evaluation of integrated envelope and lighting control strategies for commercial buildings.

Konis, Kyle Stas

2011-01-01T23:59:59.000Z

231

When the sun never sets: diverse activity rhythms under continuous daylight in free-living arctic-breeding birds  

Science Journals Connector (OSTI)

...daylight, ambient temperatures and light intensity...binomial error distribution. Models included...2012 Daily body temperature rhythms persist under the midnight sun but are absent...rhythms of body temperature in free-living...

2013-01-01T23:59:59.000Z

232

Development of computer controls for a goniophotometer  

E-Print Network (OSTI)

The investigation of innovative window materials for redirecting light and thermal sources is an important component of the field of daylighting. The Heliodome system developed in the Building Technology department is a ...

Burgos, Javier (Javier F.)

2008-01-01T23:59:59.000Z

233

System Optimization - The Global Approach to HVAC Control  

E-Print Network (OSTI)

System Optimization is a new approach to HVAC control as implemented by Energy Management Control Systems. System Optimization is defined as electronic building control strategies which treat a building's HVAC components as a complete energy...

Thielman, D. E.

1984-01-01T23:59:59.000Z

234

Building HVAC Control System Interaction Issues: Two Case Studies  

E-Print Network (OSTI)

Direct Digital Control (DDC) allows HVAC equipment to be controlled at an upper level (supervisory control) through commands from a central system, or at a lower-level (local-loop control) by local controllers. The various levels of equipment...

Chen, Q.; Deng, S.; Toole, C.; Xu, C.

2007-01-01T23:59:59.000Z

235

Output Feedback Control and Optimal Bandwidth Allocation of Networked Control Systems  

E-Print Network (OSTI)

A networked control system (NCS) is a control system where sensors, actuators, and controllers are interconnected over a communication network. This dissertation presents a framework for modeling, stability analysis, optimal control, and bandwidth...

Dong, Jiawei

2013-04-12T23:59:59.000Z

236

An Improved Daylight Correction for IR Loss in ARM Diffuse SW Measurements  

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

An Improved Daylight Correction for IR Loss An Improved Daylight Correction for IR Loss in ARM Diffuse SW Measurements C. N. Long, K. Younkin, and K. L. Gaustad Pacific Northwest National Laboratory Richland, Washington J. A. Augustine National Oceanic and Atmospheric Administration Air Resources Laboratory Surface Radiation Research Branch Boulder, Colorado Introduction A paper by Cess et al. (2000) notes that some clear-sky diffuse shortwave (SW) measurements they were using from the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) site exhibited less than Rayleigh magnitude. Remarking that this is a physical impossibility, the obvious conclusion forwarded by the authors was that there was some problem with the ARM SGP diffuse SW data. Shortly thereafter, the problem of infrared (IR) loss from thermopile-based single black detector

237

Daylight Analysis with Microcomputers for School Buildings in a Hot, Humid Climate  

E-Print Network (OSTI)

their daylighting potentials. Finally, a computer program (~aylite), was used to verify the model results and allowed for multiple iterative studies with subtle variation of envelope manipulation. Initial computer simulations based on the existing school.... Lawrence Berkeley Laboratory Reports LBL-8705, -8706, and -8707. 2. Diamond, S.C., and Hunn, B.D. 1981. "Com- parison of DOE-2 Computer Program Simulations to Metered Date for Seven Commercial Buildings." ASHRAE Transactions, Vol. 87, Pt. 1. 3...

Leaver, J.; McQueen, T.

1987-01-01T23:59:59.000Z

238

Simplification of Diesel Emission Control System Packaging Using...  

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

Simplification of Diesel Emission Control System Packaging Using SCR Coated on DPF Simplification of Diesel Emission Control System Packaging Using SCR Coated on DPF Study...

239

Common Cyber Security Vulnerabilities Observed in Control System...  

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

Common Cyber Security Vulnerabilities Observed in Control System Assessments by the INL NSTB Program Common Cyber Security Vulnerabilities Observed in Control System Assessments by...

240

Advanced PHEV Engine Systems and Emissions Control Modeling and...  

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

PHEV Engine Systems and Emissions Control Modeling and Analysis Advanced PHEV Engine Systems and Emissions Control Modeling and Analysis 2011 DOE Hydrogen and Fuel Cells Program,...

Note: This page contains sample records for the topic "daylighting control 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

National SCADA Test Bed - Enhancing control systems security...  

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

SCADA Test Bed - Enhancing control systems security in the energy sector (September 2009) National SCADA Test Bed - Enhancing control systems security in the energy sector...

242

Small- and Medium-Size Building Automation and Control System...  

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

Small- and Medium-Size Building Automation and Control System Needs: Scoping Study Small- and Medium-Size Building Automation and Control System Needs: Scoping Study Emerging...

243

Control Systems Cyber Security: Defense in Depth Strategies ...  

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

that use control system networks while maintaining a multi-tier information architecture. Control Systems Cyber Security: Defense in Depth Strategies More Documents &...

244

Software Quality Assurance Control of Existing Systems  

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

2.01.00 - 2002 2.01.00 - 2002 Software Quality Assurance Control of Existing Systems September 2002 United States Department of Energy Albuquerque Operations Office Abstract Existing software systems often represent significant investments and play important roles in the every day businesses of organizations. Many of these systems are experiencing support problems. To meet current and future operational needs, organizations need to plan how best to address these support issues. Some of the issues to consider are presented in this document with references to related standards for further detailed examination. Two tutorials, one based on software maintenance and another detailing a baseline recovery strategy are included. SQA Control of Existing Systems SQAS22.01.00-2002

245

STATIC VAR COMPENSATOR CONTROL USING A QUANTIZED CONTROLLER FOR A TWO AREA MULTI-MACHINE SYSTEM  

E-Print Network (OSTI)

Compensators (SVC) control to enhance the damping of the power-swing. The test system used is a two area multiSTATIC VAR COMPENSATOR CONTROL USING A QUANTIZED CONTROLLER FOR A TWO AREA MULTI-MACHINE SYSTEM-machine system. A severe disturbance is introduced into the power system and the quantized controller controlled

Wilamowski, Bogdan Maciej

246

Control system for heliostats and method  

SciTech Connect

A control system and method for a heliostat or a system of heliostats which operates to maintain the sunbeam properly centered with respect to an associated tracking head and tracks the sun for proper elevational and azimuthal orientation of the heliostat. The tracking date is stored in memory and utilized to reset the heliostat at night for proper orientation during the next days tracking and/or for proper orientation during sunless periods of the day. Each heliostat is therefore self-tracking.

Gerwin, H. L.

1985-05-28T23:59:59.000Z

247

Method and system for controlled combustion engines  

DOE Patents (OSTI)

A system for controlling combustion in internal combustion engines of both the Diesel or Otto type, which relies on establishing fluid dynamic conditions and structures wherein fuel and air are entrained, mixed and caused to be ignited in the interior of a multiplicity of eddies, and where these structures are caused to sequentially fill the headspace of the cylinders.

Oppenheim, A. K. (Berkeley, CA)

1990-01-01T23:59:59.000Z

248

Oscillation control system for electric motor drive  

DOE Patents (OSTI)

A feedback system for controlling mechanical oscillations in the torsionally complaint drive train of an electric or other vehicle. Motor speed is converted in a processor to estimate state signals in which a plant model which are used to electronically modify thetorque commands applied to the motor.

Slicker, James M. (Union Lake, MI); Sereshteh, Ahmad (Union Lake, MI)

1988-01-01T23:59:59.000Z

249

Do hormonal control systems produce evolutionary inertia?  

Science Journals Connector (OSTI)

...A2006Neural crest cells and the community of plan for craniofacial development: historical...Rev. Ecol. Evol. 38, 793-817. Review. Do hormonal control systems produce evolutionary...Support, U.S. Gov't, Non-P.H.S. Review | 0 Gonadal Steroid Hormones | Animals...

2008-01-01T23:59:59.000Z

250

Distributed Timing and Triggering Control System  

SciTech Connect

This document is a slide show type presentation regarding the need and realization of a new control system for work at the Nevada National Security Site. Commercial products that met the need are identified, both hardware and software. Particular emphasis is on the Integrated Signal Programmer.

Bowen, T., Huerta, J. A.

2012-08-01T23:59:59.000Z

251

Recommended Practice for Securing Control System Modems  

SciTech Connect

This paper addresses an often overlooked backdoor into critical infrastructure control systems created by modem connections. A modems connection to the public telephone system is similar to a corporate network connection to the Internet. By tracing typical attack paths into the system, this paper provides the reader with an analysis of the problem and then guides the reader through methods to evaluate existing modem security. Following the analysis, a series of methods for securing modems is provided. These methods are correlated to well-known networking security methods.

James R. Davidson; Jason L. Wright

2008-01-01T23:59:59.000Z

252

LBNL Window & Daylighting Software -- WINDOW 6 Research Version  

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

(6.3.9) (6.3.9) October 2010 Last Updated: 11/07/2010 Complex Glazing Features for WINDOW6 The Research Version of WINDOW 6 has the following modeling capabilities: Shading Layer Library: A Shading Layer Library has been added to define shading systems, such as venetian blinds and diffusing layers, which can then be added as layers in the Glazing System Library. Shade Material Library: A Shading Material Library has been added to define materials to be used in the Shading Layer Library. Properties defined in this library include shade material reflectance and absorptance (in the solar, visible and IR wavelengths ranges), as well as the conductivity of the material. Glazing System Library In the “Layers” section of the Glazing System definition, it is now possible to specify either a glass layer or a shading layer. The shading system is chosen from the Shading Layer Library.

253

Virtual control system environment: A modeling and simulation tool for process control systems  

SciTech Connect

The development of tools and techniques for security testing and performance testing of Process Control Systems (PCS) is needed since those systems are vulnerable to the same classes of threats as other networked computer systems. In practice, security testing is difficult to perform on operational PCS because it introduces an unacceptable risk of disruption to the critical systems (e.g., power grids) that they control. In addition, the hardware used in PCS is often expensive, making full-scale mockup systems for live experiments impractical. A more flexible approach to these problems can be provided through test beds that provide the proper mix of real, emulated, and virtual elements to model large, complex systems such as critical infrastructures. This paper describes a 'Virtual Control System Environment' that addresses these issues. (authors)

Lee, E.; Michalski, J.; Sholander, P.; Van Leeuwen, B. [Sandia National Laboratories, Albuquerque, NM 87111 (United States)

2006-07-01T23:59:59.000Z

254

Control landscapes for open system quantum operations  

Science Journals Connector (OSTI)

The reliable realization of control operations is a key component of quantum information applications. In practice, meeting this goal is very demanding for open quantum systems. This paper investigates the landscape defined as the fidelity J between the desired and achieved quantum operations with an open system. The goal is to maximize J as a functional of the control variables. We specify the complete set of critical points of the landscape function in the so-called kinematic picture. An associated Hessian analysis of the landscape reveals that, upon the satisfaction of a particular controllability criterion, thecritical topology is dependent on the particular environment, but no false traps (i.e. suboptimal solutions) exist. Thus, a gradient-type search algorithm should not be hindered in searching for the ultimate optimal solution with such controllable systems. Moreover, the maximal fidelity is proven to coincide with Uhlmann's fidelity between the environmental initial states associated with the achieved and desired quantum operations, which provides a generalization of Uhlmann's theorem in terms of Kraus maps.

Re-Bing Wu; Herschel Rabitz

2012-01-01T23:59:59.000Z

255

Management of Control System Information SecurityI: Control System Patch Management  

SciTech Connect

The use of information technologies in control systems poses additional potential threats due to the frequent disclosure of software vulnerabilities. The management of information security involves a series of policy-making on the vulnerability discovery, disclosure, patch development and patching. In this paper, we use a system approach to devise a model to understand the interdependencies of these decision processes. In more details, we establish a theoretical framework for making patching decision for control systems, taking into account the requirement of functionability of control systems. We illustrate our results with numerical simulations and show that the optimal operation period of control systems given the currently estimated attack rate is roughly around a half a month.

Quanyan Zhu; Miles McQueen; Craig Rieger; Tamer Basar

2011-09-01T23:59:59.000Z

256

International Conference on Machine Control & Guidance 2008 1 Use of a Machine Control & Guidance System, Deter-  

E-Print Network (OSTI)

number of official laws and standards. Possible solutions include efforts to make engineering to handle the increasing cost pressure? Possible solutions include efforts to make engineering construction accurately. Therefore support by a site worker was required and work was restricted to daylight times

257

Systems/Process Monitoring, Diagnostics and Control - Nuclear Engineering  

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

Capabilities > Nuclear Systems Capabilities > Nuclear Systems Technologies > Systems/Process Monitoring, Diagnostics and Control Capabilities Nuclear Systems Technologies Nuclear Criticality Safety Research Reactor Analysis Decontamination and Decommissioning Systems/Process Monitoring, Diagnostics and Control Overview Process Monitoring & Signal Validation Diagnostic & Advisory Systems Advanced (AI-based) Nonlinear Controllers for Industrial Processes Artificial intelligence Other Capabilities Work with Argonne Contact us For Employees Site Map Help Systems/Process Monitoring, Diagnostics and Control Bookmark and Share Systems/Process Monitoring, Diagnostics and Control Systems/Process Monitoring, Diagnostics and Control. Click on image to view larger image. The goal of the Nuclear Engineering Division's research on advanced

258

HVDC system control for damping subsynchronous oscillations  

SciTech Connect

A method for designing a supplemental subsynchronous damping control (SSDC) for an HVDC transmission system is described. The SSDC eliminates torsional instabilities caused by interaction between conventional HVDC controls and turbine-generator rotor torsional modes of vibration. Results of digital simulation used in the design process are compared with measurements made on an HVDC simulator. Results of both digital simulations and HVDC simulator tests which demonstrate SSDC performance are shown. This research and development effort was sponsored by EPRI under RP1425-1.

Piwko, R.J.; Larsen, E.V.

1982-07-01T23:59:59.000Z

259

Control System Design Guide Element 5--Integrated Commissioning and Diagnostics  

E-Print Network (OSTI)

Control System Design Guide Element 5--Integrated Commissioning and Diagnostics Project 2 Performance Commercial Building Systems #12;Table of Contents: Control System Design Guide 1. How to Use the Design Guide 2. Control System Design Process 3. Selection and Installation of Control and Monitoring

260

Erratum: Formation Control of Multiple Mobile Robots Systems  

Science Journals Connector (OSTI)

The paper entitled Formation Control of Multiple Mobile Robots Systems by Zhanfeng Li, Youliang Ma...

Zhanfeng Li; Youliang Ma; Tong Ren

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "daylighting control 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

Recommended Practice for Patch Management of Control Systems  

SciTech Connect

A key component in protecting a nations critical infrastructure and key resources is the security of control systems. The term industrial control system refers to supervisory control and data acquisition, process control, distributed control, and any other systems that control, monitor, and manage the nations critical infrastructure. Critical Infrastructure and Key Resources (CIKR) consists of electric power generators, transmission systems, transportation systems, dam and water systems, communication systems, chemical and petroleum systems, and other critical systems that cannot tolerate sudden interruptions in service. Simply stated, a control system gathers information and then performs a function based on its established parameters and the information it receives. The patch management of industrial control systems software used in CIKR is inconsistent at best and nonexistent at worst. Patches are important to resolve security vulnerabilities and functional issues. This report recommends patch management practices for consideration and deployment by industrial control systems owners.

Steven Tom; Dale Christiansen; Dan Berrett

2008-12-01T23:59:59.000Z

262

Effective Daylighting: Evaluating Daylighting Performance in the San Francisco Federal Building from the Perspective of Building Occupants  

E-Print Network (OSTI)

with a (0.24 VLT, 0.25 SHGC) solar control film, for afilm (0.24 VLT, 0.39 SHGC) and interior roller shades (3%film (0.24 VLT, 0.39 SHGC) and interior roller shades (3%

Konis, Kyle Stas

2012-01-01T23:59:59.000Z

263

Effective Daylighting: Evaluating Daylighting Performance in the San Francisco Federal Building from the Perspective of Building Occupants  

E-Print Network (OSTI)

with a (0.24 VLT, 0.25 SHGC) solar control film, for afilm (0.24 VLT, 0.39 SHGC) and interior roller shades (3%film (0.24 VLT, 0.39 SHGC) and interior roller shades (3%

Konis, Kyle Stas

2011-01-01T23:59:59.000Z

264

Control system for a small fission reactor  

DOE Patents (OSTI)

A system for controlling the reactivity of a small fission reactor includes an elongated, flexible hollow tube in the general form of a helical coiled spring axially positioned around and outside of the reactor vessel in an annular space between the reactor vessel and a surrounding cylindrical-shaped neutron reflector. A neutron absorbing material is provided within the hollow tube with the rate of the reaction controlled by the extension and compression of the hollow tube, e.g., extension of the tube increases reactivity while its compression reduces reactivity, in varying the amount of neutron absorbing material disposed between the reactor vessel and the neutron reflector. Conventional mechanical displacement means may be employed to control the coil density of the hollow tube as desired.

Burelbach, J.P.; Kann, W.J.; Saiveau, J.G.

1985-02-08T23:59:59.000Z

265

A flexible control system for flexible manufacturing systems  

E-Print Network (OSTI)

in developing nations. The current efforts in automation are identified as flexible manufacturing systems (FMSs) if they are limited to the shop floor or computer integrated manufacturing (CIM) if they include front office functions including computer aided... Unfortunately, CIM systems are ?virtually out of reach of most of the small companies that could most benefit from CIM,? because no commercial software is available to perform integrated control over the individual shop floor components (Smith and Joshi, 1995...

Scott, Wesley Dane

2004-09-30T23:59:59.000Z

266

OPSEC and Culture in Control Systems  

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

Operational Security Operational Security (OPSEC) to Support a Cyber Security Culture in Control Systems Environments Version 1.0 Draft Recommended Practice February 2007 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the U.S. Government. Neither the U.S. Government nor any agency thereof, nor any employee, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for any third party's use, or the results of such use, or any information, apparatus, product, or process disclosed in this publication, or represents that its use by such third party would not infringe privately owned rights. i ii Using Operational Security(OPSEC) to Support a Cyber Security Culture in Control Systems Environments

267

Emerging-technology systems and arms control  

SciTech Connect

The Strategic Arms Reductions Treaty (START) and the Conventional Forces in Europe (CFE) agreements call for unprecedented cuts in strategic nuclear and conventional forces. But in contrast to earlier attempts to restrict technology development in previous arms control agreements, these two treaties will have no significant limitations on emerging technology weapons systems. This report examines whether the decision to set aside emerging technology restrictions may undermine the benefits of START and CFE over the lifetimes of these treaties. The United States and the Soviet Union may continue further arms control negotiations after current treaties have been completed. In particular, the two countries committed themselves at the June 1990 Summit to negotiations on a follow-on to START. This report examines how emerging technology systems might influence the approach the United States and the Soviet Union pursue in negotiations toward START II or CFE II treaties.

Lempert, R.; Chang, I.Y.; McCallum, K.

1991-01-01T23:59:59.000Z

268

EPICS - Experimental Physics and Industrial Control System  

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

Security/Privacy Notice Security/Privacy Notice EPICS Home g+ EPICS Page on Google+ g+ Communities EPICS Users on Google+ Argonne National Laboratory Experimental Physics and Industrial Control System Home News About Base Modules Extensions Distributions Download EPICSv4 IRMIS Talk Bugs Documents Links Licensing Format page for printing Google Search Tech-talk EPICS Home Page EPICS is a set of Open Source software tools, libraries and applications developed collaboratively and used worldwide to create distributed soft real-time control systems for scientific instruments such as a particle accelerators, telescopes and other large scientific experiments. Sitemap Home: EPICS Home at APS News: Recent news Meetings: Collaboration meeting details Codeathons: Codeathon developer meetings About: What is EPICS anyway?

269

Optimally Controlled Flexible Fuel Powertrain System  

SciTech Connect

The primary objective of this project was to develop a true Flex Fuel Vehicle capable of running on any blend of ethanol from 0 to 85% with reduced penalty in usable vehicle range. A research and development program, targeting 10% improvement in fuel economy using a direct injection (DI) turbocharged spark ignition engine was conducted. In this project a gasoline-optimized high-technology engine was considered and the hardware and configuration modifications were defined for the engine, fueling system, and air path. Combined with a novel engine control strategy, control software, and calibration this resulted in a highly efficient and clean FFV concept. It was also intended to develop robust detection schemes of the ethanol content in the fuel integrated with adaptive control algorithms for optimized turbocharged direct injection engine combustion. The approach relies heavily on software-based adaptation and optimization striving for minimal modifications to the gasoline-optimized engine hardware system. Our ultimate objective was to develop a compact control methodology that takes advantage of any ethanol-based fuel mixture and not compromise the engine performance under gasoline operation.

Hakan Yilmaz; Mark Christie; Anna Stefanopoulou

2010-12-31T23:59:59.000Z

270

INTOR impurity control and first wall system  

SciTech Connect

The highlights of the recent INTOR effort on examining the key issues of the impurity control/first wall system are summarized. The emphasis of the work was an integrated study of the edge-region physics, plasma-wall interaction, materials, engineering and magnetic considerations associated with the poloidal divertor and pump limiter. The development of limiter and divertor collector plate designs with an acceptable lifetime was a major part of the work.

Abdou, M.A.

1983-04-01T23:59:59.000Z

271

AUTOMATIC VARIABLE VENTILATION CONTROL SYSTEMS BASED ON AIR QUALITY DETECTION  

E-Print Network (OSTI)

Control Systems Based on Air Quality Detection Isaac Turiel,HVAC CONTROL SYSTEM BASED ON AIR QUALITY SENSING To Zl)(lecontrol systems based on air quality detection Isaac Turiel,

Turiel, Isaac

2011-01-01T23:59:59.000Z

272

LBNL Windows & Daylighting Software -- COMFEN3: Knowledge Base  

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

COMFEN 4.0 COMFEN 4.0 Knowledge Base Last update:09/11/13 11:38 AM Download COMFEN Release Notes (includes a list of changes to the program by version) Send feedback via email to COMFENHelp@lbl.gov. Also as bugs and comments are submitted by testers, they will be posted on this Knowledge Base, so check here for the latest information about the program. CONTENTS INSTALLATION KNOWN ISSUES Installation Issues -- Administrator Between Blind Slat Width Greater than Glazing System Gap Installation Issues -- Microsoft.NET Using COMFEN 3 databases in COMFEN 4 Installation Problems COMFEN 4 database is not compatible with COMFEN 3.1 program Installation Directories by Operating System Site To Source Multiplier -- changing it does not invalidate results Minimum computer requirements

273

LBNL Windows & Daylighting Software -- COMFEN3: Knowledge Base  

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

5 5 (5.0.05 -- January 1, 2013) Last update:09/11/13 11:40 AM Download COMFEN Release Notes (includes a list of changes to the program by version) Send feedback via email to COMFENHelp@lbl.gov. Also as bugs and comments are submitted by testers, they will be posted on this Knowledge Base, so check here for the latest information about the program. CONTENTS INSTALLATION KNOWN ISSUES Installation Issues -- Administrator Between Blind Slat Width Greater than Glazing System Gap Installation Issues -- Microsoft.NET Site To Source Multiplier -- changing it does not invalidate results Installation Directories by Operating System Natural Ventilation -- heating load increases Minimum computer requirements Climate Data Does Not Display Project Database from Previous Versions -- where is it ?

274

LBNL Windows & Daylighting Software -- COMFEN3: Knowledge Base  

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

4.1 4.1 (4.1.25 -- October 4, 2012) Last update:09/11/13 11:39 AM Download COMFEN Release Notes (includes a list of changes to the program by version) Send feedback via email to COMFENHelp@lbl.gov. Also as bugs and comments are submitted by testers, they will be posted on this Knowledge Base, so check here for the latest information about the program. CONTENTS INSTALLATION KNOWN ISSUES Installation Issues -- Administrator Between Blind Slat Width Greater than Glazing System Gap Installation Issues -- Microsoft.NET Site To Source Multiplier -- changing it does not invalidate results Installation Directories by Operating System Natural Ventilation -- heating load increases Minimum computer requirements Simulation Error When Calculating a Scenario Project Database from Previous Versions -- where is it ?

275

System and method for controlling remote devices  

DOE Patents (OSTI)

A system and method for controlling remote devices utilizing a radio frequency identification (RFID) tag device having a control circuit adapted to render the tag device, and associated objects, permanently inoperable in response to radio-frequency control signals. The control circuit is configured to receive the control signals that can include an enable signal, and in response thereto enable an associated object, such as a weapon; and in response to a disable signal, to disable the tag itself, or, if desired, to disable the associated weapon or both the device and the weapon. Permanent disabling of the tag can be accomplished by several methods, including, but not limited to, fusing a fusable link, breaking an electrically conductive path, permanently altering the modulation or backscattering characteristics of the antenna circuit, and permanently erasing an associated memory. In this manner, tags in the possession of unauthorized employees can be remotely disabled, and weapons lost on a battlefield can be easily tracked and enabled or disabled automatically or at will.

Carrender, Curtis Lee (Richland, WA); Gilbert, Ronald W. (Benton City, WA); Scott, Jeff W. (Pasco, WA); Clark, David A. (Kennewick, WA)

2006-02-07T23:59:59.000Z

276

FEMP Technology Brief: Boiler Combustion Control and Monitoring System |  

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

Boiler Combustion Control and Monitoring Boiler Combustion Control and Monitoring System FEMP Technology Brief: Boiler Combustion Control and Monitoring System October 7, 2013 - 9:12am Addthis This composite photo shows technicians observing operation at the monitoring station and making subsequent fine adjustments on combustion system controls Technical staff are making boiler adjustments with the control and monitoring system. Photo courtesy of the Department of Defense's Environmental Security Technology Certification Program. Technology Description A novel combustion control system, along with gas sensors, sets the opening of fuel and air inlets based on flue-gas concentrations. Continuous feedback from measurements of oxygen, carbon monoxide, and nitrogen oxide concentrations enable the control system

277

Downhole Vibration Monitoring and Control System  

SciTech Connect

The objective of this program is to develop a system to both monitor the vibration of a bottomhole assembly, and to adjust the properties of an active damper in response to these measured vibrations. The key feature of this system is its use of a magnetorheological fluid (MRF) to allow the damping coefficient to be changed extensively, rapidly and reversibly without the use of mechanical valves, but only by the application of a current. Phase I of this program, which entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype, was completed on May 31, 2004. Much of the effort was devoted to the design and testing of the MRF damper, itself. The principal objectives of Phase II were: more extensive laboratory testing, including the evaluation of different feedback algorithms for control of the damper; design and manufacture of a field prototype system; and, testing of the field prototype in a drilling laboratory. Phase II concluded on January 31, 2006, and a final report was issued. Work on Phase III of the project began during the first quarter, 2006, with the objectives of building precommercial prototypes, testing them in a drilling laboratory and the field; developing and implementing a commercialization plan. All of these have been accomplished. The Downhole Vibration Monitoring & Control System (DVMCS) prototypes have been successfully proven in testing at the TerraTek drilling facility and at the Rocky Mountain Oilfield Test Center (RMOTC.) Based on the results of these tests, we have signed a definitive development and distribution agreement with Smith, and commercial deployment is underway. This current version of the DVMCS monitors and controls axial vibrations. Due to time and budget constraints of this program, it was not possible to complete a system that would also deal with lateral and torsional (stick-slip) vibrations as originally planned; however, this effort is continuing without DOE funding.

Martin E. Cobern

2007-09-30T23:59:59.000Z

278

Control system for the prototype of hydrogen powered car  

Science Journals Connector (OSTI)

The contribution describes design and construction of hydrogen powered car based on fuel cell technology and electrical DC-drive. The main focus is given to control system and human machine interface of the car. The practical solution of control system ... Keywords: control system design, fuel cells, human machine interface, hydrogen, programmable controllers

Jiri Koziorek; Zdenek Slanina

2005-11-01T23:59:59.000Z

279

LBNL Windows & Daylighting Software -- WINDOW5: Knowledge Base  

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

6.3 Knowledge Base 6.3 Knowledge Base Tip - use the Find function in your browser to search this page Last update:11/04/13 01:16 PM Download WINDOW 6.3 Send feedback via email to WindowHelp@lbl.gov. Also as bugs and comments are submitted by testers, the will be posted on this Knowledge Base, so check here for the latest information about the program. CONTENTS INSTALLATION KNOWN BUGS ** Operating Systems -- Microsoft Windows 7 and Vista ** Environmental Conditions -- Kimura convection model not working Locked Files with Install/De-install Environmental Conditions -- Fixed Combined Coefficient Bug Installation Problems Error Message during Calc due to decimal point of "," Minimum computer requirements Importing THERM file into WINDOW generates "Unnamed file has a bad format" error message

280

LBNL Window & Daylighting Software -- WINDOW 6 Research Version  

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

7.0 7.0 Last Updated: 05/20/2013 EN 673 / ISO 10077 Using WINDOW 7 and THERM 7 for EN 673 / ISO 10077 Calculations If you are interested in using WINDOW and THERM for EN 673 / ISO 10077 calculations, we have added that option to WINDOW 7. The calculation is not fully automated in the program yet, so there are many steps and a spreadsheet for the final calculation. We are interested in feedback (email WINDOWHelp@lbl.gov) about the process and the results from anyone who tests this feature. CAUTION: Do not model shading systems with the EN 673 thermal model. The program will produce results but they will most likely not be correct. Download this zip file (EN673.zip) which contains the following: Description of how to use WINDOW 6 and THERM 6 for the EN 673 / ISO 10077 calculations (PDF file)

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


281

Control system and method for a universal power conditioning system  

SciTech Connect

A new current loop control system method is proposed for a single-phase grid-tie power conditioning system that can be used under a standalone or a grid-tie mode. This type of inverter utilizes an inductor-capacitor-inductor (LCL) filter as the interface in between inverter and the utility grid. The first set of inductor-capacitor (LC) can be used in the standalone mode, and the complete LCL can be used for the grid-tie mode. A new admittance compensation technique is proposed for the controller design to avoid low stability margin while maintaining sufficient gain at the fundamental frequency. The proposed current loop controller system and admittance compensation technique have been simulated and tested. Simulation results indicate that without the admittance path compensation, the current loop controller output duty cycle is largely offset by an undesired admittance path. At the initial simulation cycle, the power flow may be erratically fed back to the inverter causing catastrophic failure. With admittance path compensation, the output power shows a steady-state offset that matches the design value. Experimental results show that the inverter is capable of both a standalone and a grid-tie connection mode using the LCL filter configuration.

Lai, Jih-Sheng; Park, Sung Yeul; Chen, Chien-Liang

2014-09-02T23:59:59.000Z

282

Tandem robot control system and method for controlling mobile robots in tandem  

SciTech Connect

A control system for controlling mobile robots provides a way to control mobile robots, connected in tandem with coupling devices, to navigate across difficult terrain or in closed spaces. The mobile robots can be controlled cooperatively as a coupled system in linked mode or controlled individually as separate robots.

Hayward, David R. (Albuquerque, NM); Buttz, James H. (Albuquerque, NM); Shirey, David L. (Albuquerque, NM)

2002-01-01T23:59:59.000Z

283

Methodic design of a measurement and control system for climate control in horticulture  

Science Journals Connector (OSTI)

Many papers describe applications of advanced controllers in greenhouses. As control literature focusses on control algorithms, the layout of the measurement and control system is usually underexposed. Unfortunately, commercially available greenhouse ... Keywords: Closed greenhouse, Measurement and control system, Methodic design, Watergy project

S. L. Speetjens; H. J. J. Janssen; G. van Straten; Th. H. Gieling; J. D. Stigter

2008-12-01T23:59:59.000Z

284

Conceptual design for the NSTX central instrumentation and control system  

Science Journals Connector (OSTI)

The design and construction phase for the national spherical torus experiment (NSTX) is under way at the Princeton Plasma Physics Laboratory (PPPL). Operation is scheduled to begin on April 30, 1999. This paper describes the conceptual design for the NSTX central instrumentation and control (I&C) system. Major elements of the central I&C system include the process control system, plasma control system, network system, data acquisition system, and synchronization system to support the NSTX experimental device.

D Bashore; G Oliaro; P Roney; P Sichta; K Tindall

1999-01-01T23:59:59.000Z

285

Control valve for solar heating systems  

SciTech Connect

A control valve for a solar heating system is disclosed. The valve has a valve body which defines four chambers disposed end to end. A valve operating rod is movable axially through all four chambers under motor control and carries a valve member for directing liquid through the valve. In one position of the valve member, incoming liquid is directed to an outlet for connection to a solar collector and liquid returning from the collector can flow through the valve body and back to the swimming pool. In the other position of the valve member, the liquid bypasses the collector and is directed back to the pool while liquid in the collector drains back into the valve body through the outlet and is removed by suction from a drain-down chamber in the valve body.

Stewart, J.M.

1981-12-29T23:59:59.000Z

286

Fault Tolerant Oxygen Control of a Diesel Engine Air System  

E-Print Network (OSTI)

Fault Tolerant Oxygen Control of a Diesel Engine Air System Rainer Nitsche Matthias Bitzer control problem of a Diesel engine air system having a jammed Exhaust Gas Recirculation (EGR) valve of the air system. Keywords: Fault tolerant control, Diesel engine, Air system, Model-based trajectory

Paris-Sud XI, Université de

287

Energy Efficient Pump Control for an Offshore Oil Processing System  

E-Print Network (OSTI)

Energy Efficient Pump Control for an Offshore Oil Processing System Zhenyu Yang Kian Soleiman Bo, Denmark. Abstract: The energy efficient control of a pump system for an offshore oil processing system control, energy saving 1. INTRODUCTION Pump systems have been extensively used in offshore oil & gas

Yang, Zhenyu

288

Closing the Gap in Control System Implementations  

E-Print Network (OSTI)

of off-line scheduling and optimal control. In Proceedingsframework for scheduling control tasks from multiple controlthe problem of scheduling control tasks from multiple

Saha, Indranil

2013-01-01T23:59:59.000Z

289

Occupant Response to Window Control Signaling Systems  

E-Print Network (OSTI)

1 Concurrent air supply, outdoor temperature control 1. 654air supply, outdoor temperature control 8. Lincoln Hall,Concurrentairsupply;outdoortemperaturecontrol. In

Ackerly, Katherine

2012-01-01T23:59:59.000Z

290

Systems and Controls Analysis and Testing; Harvesting More Wind Energy with Advanced Controls Technology (Fact Sheet)  

SciTech Connect

This fact sheet outlines the systems and controls analysis and testing that takes place at the NWTC on the Controls Advanced Research Turbines.

Not Available

2010-01-01T23:59:59.000Z

291

Control Systems Security Standards: Accomplishments & Impacts  

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

019 019 Unlimited Release November 2007 Control Systems Security Standards Accomplishments & Impacts Ronald Halbgewachs Prepared by Sandia National Laboratories Albuquerque, New Mexico 87185 and Livermore, California 94550 Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under Contract DE-AC04-94AL85000. Approved for public release; further dissemination unlimited. 2 Issued by Sandia National Laboratories, operated for the United States Department of Energy by Sandia Corporation. NOTICE: This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government, nor any agency

292

Variable pressure power cycle and control system  

DOE Patents (OSTI)

A variable pressure power cycle and control system that is adjustable to a variable heat source is disclosed. The power cycle adjusts itself to the heat source so that a minimal temperature difference is maintained between the heat source fluid and the power cycle working fluid, thereby substantially matching the thermodynamic envelope of the power cycle to the thermodynamic envelope of the heat source. Adjustments are made by sensing the inlet temperature of the heat source fluid and then setting a superheated vapor temperature and pressure to achieve a minimum temperature difference between the heat source fluid and the working fluid.

Goldsberry, Fred L. (Spring, TX)

1984-11-27T23:59:59.000Z

293

Controls system developments for the ERL facility  

SciTech Connect

The BNL Energy Recovery LINAC (ERL) is a high beam current, superconducting RF electron accelerator that is being commissioned to serve as a research and development prototype for a RHIC facility upgrade for electron-ion collision (eRHIC). Key components of the machine include a laser, photocathode, and 5-cell superconducting RF cavity operating at a frequency of 703 MHz. Starting with a foundation based on existing ADO software running on Linux servers and on the VME/VxWorks platforms developed for RHIC, we are developing a controls system that incorporates a wide range of hardware I/O interfaces that are needed for machine R&D. Details of the system layout, specifications, and user interfaces are provided.

Jamilkowski, J.; Altinbas, Z.; Gassner, D.; Hoff, L.; Kankiya, P.; Kayran, D.; Miller, T.; Olsen, R.; Sheehy, B.; Xu, W.

2011-10-07T23:59:59.000Z

294

Decentralized, Cooperative Control of Multivehicle Systems: Design and Stability Analysis  

E-Print Network (OSTI)

, and there is a shift toward decentralized, cooperative systems for computational efficiency and robustness. In a decentralized control scheme, control inputs are determined onboard each vehicle; therefore, decentralized controllers are more efficient for large...

Weitz, Lesley A.

2010-01-16T23:59:59.000Z

295

Design and Realization of Turbo-expander Control System  

Science Journals Connector (OSTI)

The inefficient of manual control and isolation of instrument control cannot meet the requirements of production. However, DCS fully reveals its superiority. This paper elaborates the control system based on E...

Jintang Yang; Jiaohua Shi; Gongfa Li; Zhaohui Xia

2011-01-01T23:59:59.000Z

296

Functional safety of adaptive embedded control systems: new solutions  

Science Journals Connector (OSTI)

This paper deals with the functional safety of embedded control system following component-based technologies. The functional safety in a device of the interconnected control components is handled by an agent that controls and adapts the local behaviour ...

Atef Gharbi, Mohamed Khalgui

2014-09-01T23:59:59.000Z

297

Decentralized robust control of a class of nonlinear systems and application to a boiler system  

E-Print Network (OSTI)

Decentralized robust control of a class of nonlinear systems and application to a boiler system Keywords: Asymptotic disturbance rejection Boiler systems Decentralized robust control Descriptor systems problem, a decentralized controller for the system can be calculated. In order to control a utility boiler

Marquez, Horacio J.

298

AN INTEGRATED BIOLOGICAL CONTROL SYSTEM AT HANFORD  

SciTech Connect

In 1999 an integrated biological control system was instituted at the U.S. Department of Energy's Hanford Site. Successes and changes to the program needed to be communicated to a large and diverse mix of organizations and individuals. Efforts at communication are directed toward the following: Hanford Contractors (Liquid or Tank Waste, Solid Waste, Environmental Restoration, Science and Technology, Site Infrastructure), General Hanford Employees, and Hanford Advisory Board (Native American Tribes, Environmental Groups, Local Citizens, Washington State and Oregon State regulatory agencies). Communication was done through direct interface meetings, individual communication, where appropriate, and broadly sharing program reports. The objectives of the communication efforts was to have the program well coordinated with Hanford contractors, and to have the program understood well enough that all stakeholders would have confidence in the work performed by the program to reduce or elimated spread of radioactive contamination by biotic vectors. Communication of successes and changes to an integrated biological control system instituted in 1999 at the Department of Energy's Hanford Site have required regular interfaces with not only a diverse group of Hanford contractors (i.e., those responsible for liquid or tank waste, solid wastes, environmental restoration, science and technology, and site infrastructure), and general Hanford employees, but also with a consortium of designated stake holders organized as the Hanford Advisory Board (i.e., Native American tribes, various environmental groups, local citizens, Washington state and Oregon regulatory agencies, etc.). Direct interface meetings, individual communication where appropriate, and transparency of the biological control program were the methods and outcome of this effort.

JOHNSON AR; CAUDILL JG; GIDDINGS RF; RODRIGUEZ JM; ROOS RC; WILDE JW

2010-02-11T23:59:59.000Z

299

Adaptive Power Control for Single and Multiuser Opportunistic Systems  

E-Print Network (OSTI)

In this dissertation, adaptive power control for single and multiuser opportunistic systems is investigated. First, a new adaptive power-controlled diversity combining scheme for single user systems is proposed, upon which is extended...

Nam, Sung Sik

2010-07-14T23:59:59.000Z

300

Cyber-Security of Networked Control Systems Karl Henrik Johansson  

E-Print Network (OSTI)

7/3/12 1 Cyber-Security of Networked Control Systems Karl Henrik Johansson #12;7/3/12 2 Recent Cyber-ARacks on Control Systems Cyber-Security of Networked

Johansson, Karl Henrik

Note: This page contains sample records for the topic "daylighting control 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

Performance of Johnson Matthey EGRT? Emission Control System...  

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

of Johnson Matthey Performance of Johnson Matthey EGRT EGRT (tm) (tm) Emission Control System Emission Control System for for NOx NOx and PM Emission and PM Emission Reduction in...

302

First operational experience with the CMS Run Control System  

E-Print Network (OSTI)

The Run Control System of the Compact Muon Solenoid (CMS) experiment at CERN's new Large Hadron Collider (LHC) controls the sub-detector and central data acquisition systems and the high-level trigger farm of the experiment. ...

Bauer, Gerry P.

303

A neural based position controller for an electrohydraulic servo system  

Science Journals Connector (OSTI)

This paper proposes a neural network based controller for controlling the position of an electrohydraulic servo system. Feedforward network structure, which consists of an input and output layer with one linear neuron, a hidden layer with two nonlinear ... Keywords: adaptive control, electrohydraulic servo system, model reference control, neural networks

?ahin Yildirim; Seluk Erkaya; ?brahim Uzmay; Menderes Kalkat

2011-03-01T23:59:59.000Z

304

Adaptive control based on neural network system identification  

Science Journals Connector (OSTI)

In adaptive control and system identification the self tuning regulator has wide range of applications. Neural network and artificial intelligence have big role in this area. This paper presents adaptive neural network control based on self tuning regulator ... Keywords: adaptive control, neural network, neuro control, self tuning regulator, system identification

Hassan E. A. Ibrahim

2012-02-01T23:59:59.000Z

305

Industrial Steam System Process-Control Schemes | Department...  

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

Steam System Process-Control Schemes (July 2003) More Documents & Publications Compressed Air Storage Strategies Save Energy Now in Your Steam Systems CIBO Energy Efficiency...

306

Introducing Back-up to Active Compressor Surge Control System  

E-Print Network (OSTI)

in a system with increased performance by taking advantage of both systems. Keywords: centrifugal compressorIntroducing Back-up to Active Compressor Surge Control System Nur Uddin Jan Tommy Gravdahl for introducing a back-up system to an active compressor surge control system is presented in this paper. Active

Gravdahl, Jan Tommy

307

Green Scheduling: Scheduling of Control Systems for Peak Power Reduction  

E-Print Network (OSTI)

approach to fine-grained coordination of energy demand by scheduling energy consuming control systems of the system variables only, control system execution (i.e. when energy is supplied to the system-Scheduling; Energy Systems; Peak Power Reduction; Load Balancing; I. INTRODUCTION During a major sporting event

Pappas, George J.

308

Phase Space Navigator: Towards Automating Control Synthesis in Phase Spaces for Nonlinear Control Systems  

E-Print Network (OSTI)

We develop a novel autonomous control synthesis strategy called Phase Space Navigator for the automatic synthesis of nonlinear control systems. The Phase Space Navigator generates global control laws by synthesizing ...

Zhao, Feng

1991-04-01T23:59:59.000Z

309

Integrated performance of an automated venetian blind/electric lighting system in a full-scale office environment  

SciTech Connect

Comprehensive results are presented from a fill-scale testbed of a prototype automated venetian blind lighting system installed in two unoccupied, private offices in Oakland, California. The dynamic system balanced daylight against solar heat gains in real-time, to reduce perimeter zone energy use and to increase comfort. This limited proof-of-concept test was designed to work out practical ''bugs'' and refine design details to increase cost effectiveness and acceptability of this innovative technology for real-world applications. We present results from 14 months of tuning the system design and monitoring energy performance and control system operations. For this southeast-facing office, we found that 1-22% lighting energy savings, 13-28% cooling load reductions, and 13-28% peak cooling load reductions can be achieved by the dynamic system under clear sky and overcast conditions year round, compared to a static, partly closed blind with the same optimized daylighting control system. These energy savings increase if compared to conventional daylighting controls with manually-operated blinds. Monitored data indicated that the control system met design objectives under all weather conditions to within 10% for at least 90% of the year. A pilot human factors study indicated that some of our default control settings should be adjusted to increase user satisfaction. With these adjustments, energy savings will decrease. The final prototype design yielded a 10-year simple payback for this site. If mechanical system downsizing opportunities and qualitative improvements to worker's comfort are included, this innovative technology could be more cost effective. Marketing information for commercializing this technology is given.

DiBartolomeo, D.L.; Lee, Eleanor; Selkowitz, S.E.; Vine, E.L.

1998-02-01T23:59:59.000Z

310

Integrated Modeling and Design of Nonlinear Control Systems  

E-Print Network (OSTI)

Integrated Modeling and Design of Nonlinear Control Systems Gilmer L. Blankenship Harry G. Kwatny building, simulation, control system design and real time implementation. Software Environment Overview: A summary description of a symbolic computing environment for nonlinear control system design is provided

Kwatny, Harry G.

311

Synthesis of Optimal Controllers for Cyber Physical Systems Salar Moarref  

E-Print Network (OSTI)

Synthesis of Optimal Controllers for Cyber Physical Systems Salar Moarref November 16, 2012 construction. In this framework, we consider controller synthesis problem: given a model of the system.e. a controller that optimizes a quantitative measure.We review some of the recent works on synthesis of optimal

Plotkin, Joshua B.

312

Embedded Control Systems Research Lab Truth, American Culture, and  

E-Print Network (OSTI)

Embedded Control Systems Research Lab Truth, American Culture, and Fuzzy Logic Dan Simon Cleveland" (Wiener) ­ Postmodernism: Amoral, liable to misuse ­ Fuzzy logic: ??? #12;Embedded Control Systems Control Systems Research Lab Modernism, pre- and post- · Does fuzzy logic work because it is true

Simon, Dan

313

XML ACCESS CONTROL SYSTEMS: A COMPONENT-BASED APPROACH  

E-Print Network (OSTI)

the characteristics of XML documents, allowing the definition of access control policies that operate with a fine to the integration of the access control system with Web based systems. #12;The analysis contained in this paperCHAPTER 4 XML ACCESS CONTROL SYSTEMS: A COMPONENT-BASED APPROACH E. Damiani1 S. De Capitani di

Samarati, Pierangela

314

STABILITY OF PRODUCTION-INVENTORY CONTROL SYSTEMS CONSIDERING INVENTORY SHORTAGES  

E-Print Network (OSTI)

STABILITY OF PRODUCTION-INVENTORY CONTROL SYSTEMS CONSIDERING INVENTORY SHORTAGES Jayendran@iitb.ac.in) Extended Abstract The modelling and analysis of the production-inventory control systems of manufacturing to examine the production and inventory dynamics is the application of system dynamics and control theoretic

Venkateswaran, Jayendran

315

Thermostatically controlled solar heating and cooling system  

SciTech Connect

This patent describes a solar heating and cooling system for simultaneously heating or cooling an ambient air system within a building, heating a hot water supply for domestic use within the building and heating or cooling a swimming pool adjacent the building comprising a building. This comprises a swimming pool as a primary water source, a solar connector connected to the swimming pool, a heat pump for controlling ambient air temperature within the building, an energy conservation unit connected to the heat pump and to the hot water supply for utilizing hot gases from the heat pump to heat water in the hot water supply and an air heat exchanger connected to the air system and to the heat pump for selectively heating or cooling air in the building. Also a water heat exchanger is connected to a water source for selectively transferring heat between the heat pump and the water source, a well as a secondary water source connected to the water heat exchanger.

Yovanofski, T.

1986-12-16T23:59:59.000Z

316

Electric vehicle regenerative antiskid braking and traction control system  

DOE Patents (OSTI)

An antiskid braking and traction control system for an electric or hybrid vehicle having a regenerative braking system operatively connected to an electric traction motor, and a separate hydraulic braking system includes one or more sensors for monitoring present vehicle parameters and a processor, responsive to the sensors, for calculating vehicle parameters defining the vehicle behavior not directly measurable by the sensors and determining if regenerative antiskid braking control, requiring hydrualic braking control, or requiring traction control are required. The processor then employs a control strategy based on the determined vehicle state and provides command signals to a motor controller to control the operation of the electric traction motor and to a brake controller to control fluid pressure applied at each vehicle wheel to provide the appropriate regenerative antiskid braking control, hydraulic braking control, and traction control.

Cikanek, Susan R. (Wixom, MI)

1995-01-01T23:59:59.000Z

317

Monitored lighting energy savings from dimmable lighting controls in The  

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

Monitored lighting energy savings from dimmable lighting controls in The Monitored lighting energy savings from dimmable lighting controls in The New York Times Headquarters Building Title Monitored lighting energy savings from dimmable lighting controls in The New York Times Headquarters Building Publication Type Journal Article LBNL Report Number LBNL-6171E Year of Publication 2013 Authors Fernandes, Luis L., Eleanor S. Lee, Dennis L. DiBartolomeo, and Andrew McNeil Journal Energy and Buildings Volume 68 Issue A Pagination 498-514 Date Published 01/2014 Keywords Building energy-efficiency, daylighting, lighting control systems Abstract Digital addressable, dimmable lighting controls were introduced to the US market in the early 2000s with the promise of facilitating capture of potential energy savings with greater flexibility over their historic, typically unreliable, analog counterpart. The New York Times Company installed this emerging technology, after having tested the system thoroughly prior to procurement, in their new building in New York, New York. Four years after full occupancy in 2007, the owner agreed to participate in a post-occupancy monitored evaluation of the dimmable lighting system to verify actual performance in the field. Annual lighting energy savings from daylighting, setpoint tuning and occupancy controls were determined for the daylit, open-plan office areas on three typical floors (6, 11, and 20th floors) of the 51-story high-rise tower. Energy savings were calculated from ballast control signal and occupancy data recorded by the manufacturer's lighting control system. The ballast data were calibrated with independent measurements of lighting energy consumption. Savings from dimming controls (daylighting and setpoint tuning) were 12.6 kWh/m2-yr (1.17 kWh/ft2-yr) for the daylit spaces on the three floors overall, or 20%, relative to ASHRAE 90.1-2007. Compared to the prescriptive code in effect at the time of the building's construction (ASHRAE 90.1-2001), savings were 21.0 kWh/m2-yr (1.95 kWh/ft2-yr) or 28%. Annual lighting energy use with all lighting control strategies was 33.9 kWh/m2-yr (3.15 kWh/ft2-yr) in the daylit, open plan zones on average for the three floors. A simple payback analysis was conducted.

318

Vulnerability Analysis of Energy Delivery Control Systems  

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

0-18381 0-18381 Vulnerability Analysis of Energy Delivery Control Systems September 2011 Idaho National Laboratory Idaho Falls, Idaho 83415 http://www.inl.gov Prepared for the U.S. Department of Energy Office of Electricity Delivery and Energy Reliability Under DOE Idaho Operations Office Contract DE-AC07-05ID14517 The INL is a U.S. Department of Energy National Laboratory operated by Battelle Energy Alliance DISCLAIMER This information was prepared as an account of work sponsored by an agency of the U.S. Government. Neither the U.S. Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness, of any information, apparatus, product, or

319

Active control system for high speed windmills  

DOE Patents (OSTI)

A pump stroke is matched to the operating speed of a high speed windmill. The windmill drives a hydraulic pump for a control. Changes in speed of a wind driven shaft open supply and exhaust valves to opposite ends of a hydraulic actuator to lengthen and shorten an oscillating arm thereby lengthening and shortening the stroke of an output pump. Diminishing wind to a stall speed causes the valves to operate the hydraulic cylinder to shorten the oscillating arm to zero. A pressure accumulator in the hydraulic system provides the force necessary to supply the hydraulic fluid under pressure to drive the actuator into and out of the zero position in response to the windmill shaft speed approaching and exceeding windmill stall speed. 4 figs.

Avery, D.E.

1988-01-12T23:59:59.000Z

320

Process control system using polarizing interferometer  

DOE Patents (OSTI)

A system for non-destructively measuring an object and controlling industrial processes in response to the measurement is disclosed in which an impulse laser generates a plurality of sound waves over timed increments in an object. A polarizing interferometer is used to measure surface movement of the object caused by the sound waves and sensed by phase shifts in the signal beam. A photon multiplier senses the phase shift and develops an electrical signal. A signal conditioning arrangement modifies the electrical signals to generate an average signal correlated to the sound waves which in turn is correlated to a physical or metallurgical property of the object, such as temperature, which property may then be used to control the process. External, random vibrations of the workpiece are utilized to develop discernible signals which can be sensed in the interferometer by only one photon multiplier. In addition the interferometer includes an arrangement for optimizing its sensitivity so that movement attributed to various waves can be detected in opaque objects. The interferometer also includes a mechanism for sensing objects with rough surfaces which produce speckle light patterns. Finally the interferometer per se, with the addition of a second photon multiplier is capable of accurately recording beam length distance differences with only one reading.

Schultz, Thomas J. (Maumee, OH); Kotidis, Petros A. (Waban, MA); Woodroffe, Jaime A. (North Reading, MA); Rostler, Peter S. (Newton, MA)

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "daylighting control 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

Optimal Integrated Control and Scheduling of Networked Control Systems with Communication  

E-Print Network (OSTI)

1 Optimal Integrated Control and Scheduling of Networked Control Systems with Communication Abstract-- This paper addresses the problem of the optimal control and scheduling of Networked Control. This formulation allows the solving of the optimal control and scheduling problem using efficient branch and bound

Paris-Sud XI, Université de

322

Primer Control System Cyber Security Framework and Technical Metrics  

SciTech Connect

The Department of Homeland Security National Cyber Security Division supported development of a control system cyber security framework and a set of technical metrics to aid owner-operators in tracking control systems security. The framework defines seven relevant cyber security dimensions and provides the foundation for thinking about control system security. Based on the developed security framework, a set of ten technical metrics are recommended that allow control systems owner-operators to track improvements or degradations in their individual control systems security posture.

Wayne F. Boyer; Miles A. McQueen

2008-05-01T23:59:59.000Z

323

Monitored lighting energy savings from dimmable lighting controls in The New York Times Headquarters Building  

Science Journals Connector (OSTI)

Abstract Digital addressable, dimmable lighting controls were introduced to the US market in the early 2000s with the promise of energy savings while allowing greater flexibility than their analog counterpart. The New York Times Company installed this emerging technology, after thorough pre-procurement testing, in their new building in New York, NY. Four years after full occupancy (2007), the owner agreed to participate in post-occupancy monitoring of the lighting system to verify actual performance. Annual lighting energy savings from daylighting, setpoint tuning and occupancy controls were determined for the daylit, open-plan office areas on three typical floors (6th, 11th, and 20th) of the 51-story tower. Energy savings were calculated from data recorded by the lighting control system, after calibration through independent energy consumption measurements. Savings from dimming controls (daylighting and setpoint tuning) were 12.6kWh/m2yr for the daylit spaces on the three floors overall, or 20%, relative to ASHRAE 90.1-2007. Against the prescriptive code in effect at the time of the building's construction (ASHRAE 90.1-2001), savings were 21.0kWh/m2yr or 28%. Annual lighting energy use with all lighting control strategies was 33.9kWh/m2yr in the daylit, open plan zones on average for the three floors. A simple payback analysis was conducted.

Lus L. Fernandes; Eleanor S. Lee; Dennis L. DiBartolomeo; Andrew McNeil

2014-01-01T23:59:59.000Z

324

Thermal and daylighting evaluation of the effect of varying aspect ratios in urban canyons in Curitiba, Brazil  

Science Journals Connector (OSTI)

Urbanization is commonly associated with densification which may lead to vertical growth or urban consolidation. The present study evaluates the daylighting potential as a function of urban morphology for the city of Curitiba ( 25 2 5 ? 5 0 ? ? S 46 1 6 ? 1 5 ? ? W ). It also presents a thermal analysis for a representative street axis orientation in this location showing indoor conditions within a test office for different aspect ratios. In Curitiba certain street axes were designated to allow densification (in the so-called structural sector of the city). As a consequence there is a great risk of urban canyons being formed as local legislation does not impose height restrictions to adjacent buildings. Daylight analysis was based on software simulations with LUZ DO SOL DLN ECOTECT and RADIANCE. Thermal analysis was carried out by means of computer simulations with the IDA ICEsoftware. It was verified that diagonal axial orientations relative to the north (rotated in 45) provide higher daylighting potentials to buildings located in urban canyons. With regard to the thermal effect of varying the aspect ratio in an east-west street axis results confirm daylighting simulations showing the interrelation between both comfort parameters.

Eduardo Krger; Mauro Suga

2009-01-01T23:59:59.000Z

325

s daylight begins to illuminate the countryside, a cold wind rustles through the leaves of the weedy rows of  

E-Print Network (OSTI)

A s daylight begins to illuminate the countryside, a cold wind rustles through the leaves Experiment Station, while the bulk of the funding came from Federal Aid to Wildlife Restoration administered implemented by the U.S. Fish & Wildlife Service on public lands where deer were hav- ing a noticeable negative

326

Java Automation Controller and Real-Time Systems  

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

Java Automation Controller and Real-Time Systems Java Automation Controller and Real-Time Systems Speaker(s): Greg Bollella Date: June 29, 2009 - 12:00pm Location: 90-3122 Java has always been a disruptive technology and now it is breaking the mold in industrial, process, building, and transportation automation systems. For many years, programmable logic controllers (PLCs), the digital versions of old relay-based control systems (such as that used in the NYC Subway system in the late 1800s) have primarily controlled these systems. PLCs are the workhorses of the controls industry but the market is characterized by proprietary, closed, expensive, special-purpose solutions. A Java-based automation controller breaks the mold by allowing control algorithms, which require strict real-time capabilities, to run on

327

International Rectifier Power Control Systems | Open Energy Information  

Open Energy Info (EERE)

Rectifier Power Control Systems Rectifier Power Control Systems Jump to: navigation, search Name International Rectifier Power Control Systems Place El Segundo, California Zip 90245 Product Originally a division of International Rectifier Corporation manufacturing semiconductor and module components for power management products. References International Rectifier Power Control Systems[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. International Rectifier Power Control Systems is a company located in El Segundo, California . References ↑ "International Rectifier Power Control Systems" Retrieved from "http://en.openei.org/w/index.php?title=International_Rectifier_Power_Control_Systems&oldid=347055"

328

Lighting Controls in Commercial Buildings  

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

Lighting Controls in Commercial Buildings Lighting Controls in Commercial Buildings Title Lighting Controls in Commercial Buildings Publication Type Report Year of Publication 2012 Authors Williams, Alison A., Barbara A. Atkinson, Karina Garbesi, Erik Page, and Francis M. Rubinstein Series Title The Journal of the Illuminating Engineering Society of North America Volume 8 Document Number 3 Pagination 161-180 Date Published January ISBN Number 1550-2716 Keywords controls, daylighting, energy, occupancy sensors, tuning. Abstract Researchers have been quantifying energy savings from lighting controls in commercial buildings for more than 30 years. This study provides a meta-analysis of lighting energy savings identified in the literature-240 savings estimates from 88 papers and case studies, categorized into daylighting strategies, occupancy strategies, personal tuning, and institutional tuning. Beginning with an overall average of savings estimates by control strategy, successive analytical filters are added to identify potential biases introduced to the estimates by different analytical approaches. Based on this meta-analysis, the bestestimates of average lighting energy savings potential are 24 percent for occupancy, 28 percent for daylighting, 31 percent for personal tuning, 36 percent for institutional tuning, and 38 percent for multiple approaches. The results also suggest that simulations significantly overestimate (by at least 10 percent) the average savings obtainable from daylighting in actual buildings.

329

Selection and Evaluation of Energy Management and Control Systems  

E-Print Network (OSTI)

that at one time or another the central control of any system will fail. Therefore, it is an absolute must that any system allow for reasonable function ing with the central control inoperable. S. A system should be appropriate to the situations within... that at one time or another the central control of any system will fail. Therefore, it is an absolute must that any system allow for reasonable function ing with the central control inoperable. S. A system should be appropriate to the situations within...

Moderow, R. R.

1982-01-01T23:59:59.000Z

330

Next Generation Nuclear Plant Resilient Control System Functional Analysis  

SciTech Connect

Control Systems and their associated instrumentation must meet reliability, availability, maintainability, and resiliency criteria in order for high temperature gas-cooled reactors (HTGRs) to be economically competitive. Research, perhaps requiring several years, may be needed to develop control systems to support plant availability and resiliency. This report functionally analyzes the gaps between traditional and resilient control systems as applicable to HTGRs, which includes the Next Generation Nuclear Plant; defines resilient controls; assesses the current state of both traditional and resilient control systems; and documents the functional gaps existing between these two controls approaches as applicable to HTGRs. This report supports the development of an overall strategy for applying resilient controls to HTGRs by showing that control systems with adequate levels of resilience perform at higher levels, respond more quickly to disturbances, increase operational efficiency, and increase public protection.

Lynne M. Stevens

2010-07-01T23:59:59.000Z

331

The use of expert systems in well control  

E-Print Network (OSTI)

of this research was to combine well control simulators and expert systems, into an effective well control training tool. Also of great importance was that the system should be based around a small computer system like the Macintosh II. A Driller's Panel... Hierarchy Program Manager Data Entry Driller's Panel Simulator ? Pre-Kick Environment. Pre-Kick Expert System Predictive Model Driller's Panel Simulator - Circulation Environment Circulation Expert System VERIFICATION OF THE SYSTEM Data Used...

Stoll, Paul Eugene

1990-01-01T23:59:59.000Z

332

GAO Challenges and Efforts to Secure Control Systems (March 2004) |  

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

GAO Challenges and Efforts to Secure Control Systems (March 2004) GAO Challenges and Efforts to Secure Control Systems (March 2004) GAO Challenges and Efforts to Secure Control Systems (March 2004) Computerized control systems perform vital functions across many of our nation's critical infrastructures. For example, in natural gas distribution, they can monitor and control the pressure and flow of gas through pipelines. In October 1997, the President's Commission on Critical Infrastructure Protection emphasized the increasing vulnerability of control systems to cyber attacks. The House Committee on Government Reform and its Subcommittee on Technology, Information Policy, Intergovernmental Relations and the Census asked GAO to report on potential cyber vulnerabilities, focusing on (1) significant cybersecurity risks associated with control systems (2) potential and reported cyber attacks

333

Apparatus for controlling system state based on unique identifiers  

DOE Patents (OSTI)

An apparatus allows workers to assert and release control over the energization of a system. The apparatus does not require the workers to carry any additional paraphernalia, and is not be easily defeated by other workers. Users asserting and releasing control present tokens uniquely identifying each user to a reader, and the apparatus prevents transition of the system to an undesired state until an appropriate number of users are currently asserting control. For example, a dangerous manufacturing robot can be prevented from energizing until all the users that have asserted control when entering the robot's controlled space have subsequently released control when leaving the robot's controlled space.

Drotning, William D. (Albuquerque, NM)

2002-01-01T23:59:59.000Z

334

Stochastic Sensor Scheduling for Networked Control Systems Farhad Farokhi  

E-Print Network (OSTI)

Stochastic Sensor Scheduling for Networked Control Systems Farhad Farokhi and Karl H. Johansson Abstract Optimal sensor scheduling with applications to networked estimation and control systems to optimal control of Markov chains, we extract an optimal scheduling policy to fairly allocate the network

Johansson, Karl Henrik

335

An Optimal General Purpose Scheduler for Networked Control Systems  

E-Print Network (OSTI)

An Optimal General Purpose Scheduler for Networked Control Systems Ahmed Elmahdi , Ahmad F Taha to control the time delay is to im- prove the scheduling criterion. This paper proposes an optimal scheduling the stability of the control system. The proposed optimal schedul- ing protocol is a hybrid scheduling criterion

Sun, Dengfeng

336

Scheduling and Feedback Co-Design for Networked Control Systems  

E-Print Network (OSTI)

Scheduling and Feedback Co-Design for Networked Control Systems Michael S. Branicky,1 Stephen M mes- sages are transmitted). In the past, control system design and CPU scheduling or network scheduling design have normally been sepa- rated. This separation has allowed the control commu- nity

Branicky, Michael S.

337

Topics in Modeling, Control, and Implementation in Automotive Systems  

E-Print Network (OSTI)

on inclusion of the dynamics of load transfer, which are of importance in active yaw-control and rollTopics in Modeling, Control, and Implementation in Automotive Systems #12;#12;Topics in Modeling, Control, and Implementation in Automotive Systems Magnus Gäfvert Lund 2003 #12;To my Mother (1943 ­ 1995

338

Co-Simulation Tools for Networked Control Systems  

E-Print Network (OSTI)

, unmanned vehicles, home robotics, distributed virtual environments, power distribution, and building-simulation. The first two tools are extensions to ns-2 called Agent/Plant and NSCSPlant; the third tool integrates and control of the physical world. (right) A networked control system with one controlled system (a.k.a. plant

Branicky, Michael S.

339

H? controller and bumpless transfer design for marine propulsion system  

Science Journals Connector (OSTI)

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

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

2009-12-01T23:59:59.000Z

340

Sliding Mode Control of EV Electric Differential System  

E-Print Network (OSTI)

of an electric differential system for Electric Vehicle (EV) with two induction motor drives (one for each wheel of electric drives to control the generated torque and the introduction of an independent control400 1 Sliding Mode Control of EV Electric Differential System A. Haddoun, M. E. H. Benbouzid, D

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "daylighting control 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

The Powerhouse Control System Audit as a Means of Insuring a Successful System Design and Implementation  

E-Print Network (OSTI)

-70 Type System Survey - Characterized by Single Loop Analog Instrument System, relay or indi vidual PLC's and tennor drum programmers. ? Number of controllers not in automatic con trol. ? Review of recorder charts for effectiveness of control... the electrical system. Review the MCC's, electric rooms and control systems. 1980-1990 Type System Survey - Characterized by the application of networked PLC and DCS Systems in addition to the analog controls ? Check equipment health, communication and I...

Wood, M. E.; Robinson, J. E.

342

Automatic Voltage Control of Electrical Systems  

Science Journals Connector (OSTI)

... to have complete automatic voltage regulation and it also has supervisory control for its main substations. By a careful application of automatically controlled regulators it is shown that the voltage ...

1934-01-20T23:59:59.000Z

343

A Framework for Flexible Access Control in Digital Library Systems  

E-Print Network (OSTI)

to merely control access to documents local to the digital library. The access control policies are often called DACM (Document Access Control Methods). The basic idea is geared toward discretionary accessA Framework for Flexible Access Control in Digital Library Systems Indrajit Ray and Sudip

Ray, Indrajit

344

Cyber Effects Analysis Using VCSE Promoting Control System Reliability |  

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

Cyber Effects Analysis Using VCSE Promoting Control System Cyber Effects Analysis Using VCSE Promoting Control System Reliability Cyber Effects Analysis Using VCSE Promoting Control System Reliability This report describes the Virtual Control System Environment (VCSE) technology- developed at Sandia National Laboratories-to investigate Supervisory Control And Data Acquisition (SCADA) vulnerabilities associated with energy systems; and it describes a set of experiments with findings from using that environment. The report explains how VCSE can be used to analyze and develop an understanding of cyber attacks. Specific analyses in this report focus on unencrypted, unsecured data channels on Internet protocol (IP)-routed computer networks within electric power systems. Cyber Effects Analysis Using VCSE Promoting Control System Reliability

345

Monitored Energy Performance of Electrochromic Windows Controlled for Daylight and Visual Comfort  

E-Print Network (OSTI)

absorptive electrochromic (EC) windows tested were market-electrochromic windows that were deemed sufficiently mature for market

Lee, Eleanor S.; DiBartolomeo, Dennis L.; Klems, Joseph; Yazdanian, Mehry; Selkowitz, Stephen E.

2005-01-01T23:59:59.000Z

346

Monitored Energy Performance of Electrochromic Windows Controlled for Daylight and Visual Comfort  

E-Print Network (OSTI)

Subject responses to electrochromic windows. Submitted toin a full-scale electrochromic window testbed. Technicaloptimization of electrochromic operations for occupant

Lee, Eleanor S.; DiBartolomeo, Dennis L.; Klems, Joseph; Yazdanian, Mehry; Selkowitz, Stephen E.

2005-01-01T23:59:59.000Z

347

Monitored Energy Performance of Electrochromic Windows Controlled for Daylight and Visual Comfort  

E-Print Network (OSTI)

solar heat gain coefficient (SHGC)=0.42-0.09). Fifteen ECproperties were Tv=0.60-0.05, SHGC=0.42-0.09, and U-Value=glass properties were Tv=0.42, SHGC=0.219, U-Value=1.408 W/m

Lee, Eleanor S.; DiBartolomeo, Dennis L.; Klems, Joseph; Yazdanian, Mehry; Selkowitz, Stephen E.

2005-01-01T23:59:59.000Z

348

Control system and method for payload control in mobile platform cranes  

DOE Patents (OSTI)

A crane control system and method provides a way to generate crane commands responsive to a desired payload motion to achieve substantially pendulation-free actual payload motion. The control system and method apply a motion compensator to maintain a payload in a defined payload configuration relative to an inertial coordinate frame. The control system and method can further comprise a pendulation damper controller to reduce an amount of pendulation between a sensed payload configuration and the defined payload configuration. The control system and method can further comprise a command shaping filter to filter out a residual payload pendulation frequency from the desired payload motion.

Robinett, III, Rush D. (Tijeras, NM); Groom, Kenneth N. (Albuquerque, NM); Feddema, John T. (Albuquerque, NM); Parker, Gordon G. (Houghton, MI)

2002-01-01T23:59:59.000Z

349

Pollution Control in a Manufacturing System Stochastic Models for Analysis and Control of Air Pollution  

E-Print Network (OSTI)

Pollution Control in a Manufacturing System Stochastic Models for Analysis and Control of Air models that can be used for controlling pollution in a manufacturing system. The models are developed. Introduction Pollution of air resulting from toxic wastes emitted by large manufacturing plants and power

Gosavi, Abhijit

350

Practical Issues in Formation Control of Multi-Robot Systems  

E-Print Network (OSTI)

for distributed control based on nominal agent models, and (2) robust tracking of reference trajectories under model uncertainties. Proposed is a two-layer hierarchical architecture for collectivemotion control ofmultirobot nonholonomic systems. It endows robotic...

Zhang, Junjie

2010-07-14T23:59:59.000Z

351

Access Rate Control System | Y-12 National Security Complex  

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

by this browser. Download video Captions: On Time: 4:03 min Developed to support safeguards and security, the Access Rate Control System (ARCS) controls the speed of entry...

352

Reference Model for Control and Automation Systems in Electrical Power |  

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

Model for Control and Automation Systems in Electrical Model for Control and Automation Systems in Electrical Power Reference Model for Control and Automation Systems in Electrical Power Modern infrastructure automation systems are threatened by cyber attack. Their higher visibility in recent years and the increasing use of modern information technology (IT) components contribute to increased security risk. A means of analyzing these infrastructure automation systems is needed to help understand and study the many system relationships that affect the overall security of the system. Modeling these systems is a very cost effective means of addressing the problem of security from an overall system view. The model presented in the document below provides a structured, cost effective approach to address technical security in process control systems

353

Preliminary Study Using ForwardPreliminary Study Using Forward Reaction Control System JetsReaction Control System Jets  

E-Print Network (OSTI)

Preliminary Study Using ForwardPreliminary Study Using Forward Reaction Control System JetsReaction Control System Jets During Space Shuttle EntryDuring Space Shuttle Entry Carolina Restrepo Currently the shuttle uses only aft RCS jets for yaw control during entry Enough to handle present flight

Valasek, John

354

Control of Microfluidic Systems: Two Examples, Results, and Challenges  

E-Print Network (OSTI)

1 Control of Microfluidic Systems: Two Examples, Results, and Challenges Micheal Armani, Satej results and challenges in feedback control of microfluidic systems. Results are provided for two Integration of Micro- and Nano-Scale Systems' organized by the author. 2. Introduction Microfluidics refers

Shapiro, Benjamin

355

Review of Supervisory Control and Data Acquisition (SCADA) Systems  

SciTech Connect

A review using open source information was performed to obtain data related to Supervisory Control and Data Acquisition (SCADA) systems used to supervise and control domestic electric power generation, transmission, and distribution. This report provides the technical details for the types of systems used, system disposal, cyber and physical security measures, network connections, and a gap analysis of SCADA security holes.

Reva Nickelson; Briam Johnson; Ken Barnes

2004-01-01T23:59:59.000Z

356

Remote-Controlled Home Automation Systems with Different Network Technologies  

E-Print Network (OSTI)

Remote-Controlled Home Automation Systems with Different Network Technologies Armando Roy Delgado into the potential for remote controlled operation of home automation systems. It considers problems, 2002) which certainly requires a careful study before developing any suitable Home Automation System

Grout, Vic

357

BEHAVIOR PREDICTION FOR DECISION AND CONTROL IN COGNITIVE AUTONOMOUS SYSTEMS  

E-Print Network (OSTI)

BEHAVIOR PREDICTION FOR DECISION AND CONTROL IN COGNITIVE AUTONOMOUS SYSTEMS ASOK RAY*, SHASHI for decision and control in cognitive autonomous systems. The objective is to coordinate human­machine collaboration such that human operators can assess and enable autonomous systems to utilize their experi- ential

Ray, Asok

358

AN OPERATOR EXPERIENCE WITH A HIERARCHICAL REALTIME CONTROL SYSTEM (RCS)  

E-Print Network (OSTI)

AN OPERATOR EXPERIENCE WITH A HIERARCHICAL REAL­TIME CONTROL SYSTEM (RCS) Hui­Min Huang Mechanical@cme.nist.gov ABSTRACT The issue of operator interface in the RCS hierarchical control systems is the focus operators to be involved in system operations in different degrees. In some situations, the operators

359

Retrofit Diesel Emissions Control System Providing 50% NOxControl  

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

B. Berry, T. Caron, J. Cizeron, T. Kinney, K. Lundberg and R. Dalla Betta Catalytica Energy Systems, Inc. The preparation of this poster is based on work funded in part by the...

360

Help for the Developers of Control System Cyber Security Standards  

SciTech Connect

A Catalog of Control Systems Security: Recommendations for Standards Developers (Catalog), aimed at assisting organizations to facilitate the development and implementation of control system cyber security standards, has been developed. This catalog contains requirements that can help protect control systems from cyber attacks and can be applied to the Critical Infrastructures and Key Resources of the United States and other nations. The requirements contained in the catalog are a compilation of practices or various industry bodies used to increase the security of control systems from both physical and cyber attacks. They should be viewed as a collection of recommendations to be considered and judiciously employed, as appropriate, when reviewing and developing cyber security standards for control systems. The recommendations in the Catalog are intended to be broad enough to provide any industry using control systems the flexibility needed to develop sound cyber security standards specific to their individual security requirements.

Robert P. Evans

2008-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "daylighting control 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

Control and optimization system and method for chemical looping processes  

DOE Patents (OSTI)

A control system for optimizing a chemical loop system includes one or more sensors for measuring one or more parameters in a chemical loop. The sensors are disposed on or in a conduit positioned in the chemical loop. The sensors generate one or more data signals representative of an amount of solids in the conduit. The control system includes a data acquisition system in communication with the sensors and a controller in communication with the data acquisition system. The data acquisition system receives the data signals and the controller generates the control signals. The controller is in communication with one or more valves positioned in the chemical loop. The valves are configured to regulate a flow of the solids through the chemical loop.

Lou, Xinsheng; Joshi, Abhinaya; Lei, Hao

2014-06-24T23:59:59.000Z

362

Mitigations for Security Vulnerabilities Found in Control System Networks |  

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

Mitigations for Security Vulnerabilities Found in Control System Mitigations for Security Vulnerabilities Found in Control System Networks Mitigations for Security Vulnerabilities Found in Control System Networks Industry is aware of the need for Control System (CS) security, but in on-site assessments, Idaho National Laboratory (INL) has observed that security procedures and devices are not consistently and effectively implemented. The Department of Homeland Security (DHS), National Cyber Security Division (NCSD), established the Control Systems Security Center (CSSC) at INL to help industry and government improve the security of the CSs used in the nation's critical infrastructures. One of the main CSSC objectives is to identify control system vulnerabilities and develop effective mitigations for them. This paper discusses common problems and vulnerabilities seen in

363

Engine control system having speed-based timing  

DOE Patents (OSTI)

A control system for an engine having a cylinder is disclosed having an engine valve movable to regulate a fluid flow of the cylinder and an actuator associated with the engine valve. The control system also has a controller in communication with the actuator. The controller is configured to receive a signal indicative of engine speed and compare the engine speed signal with a desired engine speed. The controller is also configured to selectively regulate the actuator to adjust a timing of the engine valve to control an amount of air/fuel mixture delivered to the cylinder based on the comparison.

Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

2012-02-14T23:59:59.000Z

364

Critical issues in process control system security : DHS spares project.  

SciTech Connect

The goals of this event are: (1) Discuss the next-generation issues and emerging risks in cyber security for control systems; (2) Review and discuss common control system architectures; (3) Discuss the role of policy, standards, and supply chain issues; (4) Interact to determine the most pertinent risks and most critical areas of the architecture; and (5) Merge feedback from Control System Managers, Engineers, IT, and Auditors.

Hernandez, Jacquelynne; McIntyre, Annie; Henrie, Morgan

2010-10-01T23:59:59.000Z

365

HVDC control system based on parallel digital signal processors  

SciTech Connect

A numerical HVDC control system operating in real time has been developed for a simulator to be used for operator training. The control system, implemented with digital signal processors (DSPs), consists of typical HVDC control functions such as the synchronizing unit, the regulation unit, the protection unit, the firing unit, the tap changer and the reactive power regulation unit. Results from the steady-state and the transient performance validation tests carried out on the IREQ power system simulator are provided.

Maharsi, Y.; Do, V.Q.; Sood, V.K.; Casoria, S.; Belanger, J. [Hydro-Quebec, Varennes, Quebec (Canada)] [Hydro-Quebec, Varennes, Quebec (Canada)

1995-05-01T23:59:59.000Z

366

Development of an NC equipment level controller in a hierarchical shop floor control system  

E-Print Network (OSTI)

The methodology of developing an NC equipment controller in a Computer Integrated Manufacturing (CIM) System, which is based on a philosophy of hierarchical shop floor control, is presented in this research. The underlying architecture consists...

Chang, William

2012-06-07T23:59:59.000Z

367

24th Benelux Meeting Systems and Control  

E-Print Network (OSTI)

applied on a half-car test rig.30­14.55 Contribution to the control of a rotary cement kiln - A simu- lation . . . . . . . . . . . . . . . . . . . . . . . . . . .

Serdijn, Wouter A.

368

Application of multi-variable control for automatic frequency controller of HVDC transmission system  

SciTech Connect

In an HVDC transmission system that links two ac power systems, the automatic frequency controller (AFC) calculates power to be interchanged between the two ac systems according to their frequencies thereby improving the frequency characteristics of the two power systems. This paper introduces a newly developed dc AFC system, which applies a multi-variable control to the dc system-based frequency control. It is capable of controlling the frequencies of the two ac systems optimally while maintaining their stability. This system was developed for one of Japan's HVDC transmission facilities and produced good results in a combined test using a power system simulator. The field installation will be completed in March 1993, when the AFC system will enter service.

Sanpei, Masatoshi (Electric Power Development Co., Tokyo (Japan)); Kakehi, Atsuyuki; Takeda, Hideo (Toshiba Corp., Tokyo (Japan))

1994-04-01T23:59:59.000Z

369

Recommended Practice for Securing Control System Modems | Department of  

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

Practice for Securing Control System Modems Practice for Securing Control System Modems Recommended Practice for Securing Control System Modems This paper addresses an often overlooked "backdoor" into critical infrastructure control systems created by modem connections. A modem's connection to the public telephone system is similar to a corporate network connection to the Internet. By tracing typical attack paths into the system, this paper provides the reader with an analysis of the problem and then guides the reader through methods to evaluate existing modem security. Following the analysis, a series of methods for securing modems is provided. These methods are correlated to well-known networking security methods. Recommended Practice for Securing Control System Modems More Documents & Publications

370

Control Systems Cyber Security:Defense in Depth Strategies  

SciTech Connect

Information infrastructures across many public and private domains share several common attributes regarding IT deployments and data communications. This is particularly true in the control systems domain. A majority of the systems use robust architectures to enhance business and reduce costs by increasing the integration of external, business, and control system networks. However, multi-network integration strategies often lead to vulnerabilities that greatly reduce the security of an organization, and can expose mission-critical control systems to cyber threats. This document provides guidance and direction for developing defense-in-depth strategies for organizations that use control system networks while maintaining a multi-tier information architecture that requires: Maintenance of various field devices, telemetry collection, and/or industrial-level process systems Access to facilities via remote data link or modem Public facing services for customer or corporate operations A robust business environment that requires connections among the control system domain, the external Internet, and other peer organizations.

David Kuipers; Mark Fabro

2006-05-01T23:59:59.000Z

371

Dual fuel engine control systems for transportation applications  

SciTech Connect

Microprocessor control systems have been developed for dual fuel diesel engines intended for transportation applications. Control system requirements for transportation engines are more demanding than for stationary engines, as the system must be able to cope with variable speed and load. Detailed fuel maps were determined for both normally aspirated and turbocharged diesel engines based on the criterion that the engine did not operate in the regimes where knock or incomplete combustion occurred. The control system was developed so that the engine would follow the detailed fuel map. The input variables to the control system are engine speed and load. Based on this, the system then controls the amount of natural gas and diesel fuel supplied to the engine. The performance of the system is briefly summarized.

Gettel, L.E.; Perry, G.C.; Boisvert, J.; O'Sullivan, P.J.

1987-10-01T23:59:59.000Z

372

Problems of control and stabilization of impulsive-control dynamic systems with application to nonholonomic mechanics  

Science Journals Connector (OSTI)

Consideration was given to the control systems using impulses as admissible actions. For impulses of different orders and degrees, these systems can be reduced to a form accepted in the current theory of impulsive systems. The problems of control and ... Keywords: 02.30.Yy, 45.80.+r

A. M. Kovalev; N. V. Kravchenko; V. N. Nespirnyi

2007-08-01T23:59:59.000Z

373

A Summary of Control System Security Standards Activities in...  

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

sector standards, guidelines, and technical reports, demonstrating standards coverage by security topic. This work focuses on control systems standards applicable to the energy...

374

Design, fabrication, and characterization of controllable conducting polymer actuation systems  

E-Print Network (OSTI)

The geometric, hierarchal, multifunctional composition of mammalian skeletal muscle and the neuromuscular system consists of actuation elements, length sensors, force sensors, localized energy storage, controlled energy ...

Paster, Eli (Eli Travis)

2010-01-01T23:59:59.000Z

375

Optimal Control of Harvesting Ice Thermal Storage Systems  

E-Print Network (OSTI)

for optimal control of a harvesting ice storage system. A simplified procedure is used to develop 24 hour load data. Example installations will be shown....

Knebel, D. E.

1988-01-01T23:59:59.000Z

376

Set point optimization of controlled Organic Rankine Cycle systems  

Science Journals Connector (OSTI)

In this paper, an approach to optimize set points is proposed for controlled Organic Rankine Cycle (ORC) systems. Owing to both disturbances...

Jianhua Zhang; Mingming Lin; Fei Shi; Jia Meng; Jinliang Xu

2014-11-01T23:59:59.000Z

377

Modeling, Estimation, and Control of Waste Heat Recovery Systems  

E-Print Network (OSTI)

for Open Organic Rankine Cycle (ORC)138 Evaporatorand Simulation of an Organic Rankine Cycle (ORC) System forControl of Organic Rankine Cycles in Waste Heat Uti- lizing

Luong, David

2013-01-01T23:59:59.000Z

378

Tank Monitoring and Control System (TMACS) Acceptance Test Procedure  

SciTech Connect

This document is used to validate Revision 13.0 of the Tank Monitor and Control System (TMACS) and verify it functions as intended by design.

BARNES, D.A.

2000-12-14T23:59:59.000Z

379

Performance of Johnson Matthey EGRT? Emission Control System...  

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

Performance of Johnson Matthey EGRT Emission Control System for NOx and PM Emission Reduction in Retrofit Applications Part 1 Performance of Johnson Matthey EGRT Emission...

380

Performance of Johnson Matthey EGRT? Emission Control System...  

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

* Doug Emig Emigd@JMUSA.com * Sougato Chatterjee Chatterjee@JMUSA.com * WWW.JMCSD.COM Johnson Matthey Diesel Emission Control Systems 380 Lapp Road Malvern, PA 19355...

Note: This page contains sample records for the topic "daylighting control 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

Performance of Johnson Matthey EGRT? Emission Control System...  

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

2 Performance of Johnson Matthey EGRT Emission Control System for NOx and PM Emission Reduction in Retrofit Applications Part 2 2002 DEER Conference Presentation: Johnson Matthey...

382

Commissioning and Performance Diagnostics for HVAC Control Systems  

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

Commissioning and Performance Diagnostics for HVAC Control Systems Commissioning and Performance Diagnostics for HVAC Control Systems Speaker(s): Ashish Singhal Date: December 20, 2006 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Philip Haves The presentation will focus on practical aspects of commissioning control loops in commercial HVAC systems and evaluating their routine performance. Simple and theoretically sound methods for diagnosing control performance will be presented that detect serious performance issues associated with control loops in modern buildings. The discussion will center on a new control loop commissioning tool that helps field personnel to quickly test, tune and troubleshoot control loops. In addition to the active tests for commissioning control loops, a suite of diagnostic algorithms are used in a

383

Comparative controller design for a marine gas turbine propulsion system  

SciTech Connect

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

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

1990-04-01T23:59:59.000Z

384

Cyber vulnerability in power systems operation and control  

Science Journals Connector (OSTI)

Modern power systems are composed of several interacting national systems synchronously or asynchronously interconnected over large geographic areas, and in the European case on a continental basis. In each country several areas are put under the control ...

Ettore Bompard; Paolo Cuccia; Marcelo Masera; Igor Nai Fovino

2012-01-01T23:59:59.000Z

385

Experimental Automatic Lateral Control System For An Automobile  

E-Print Network (OSTI)

Control System for an Automobile Huei Peng, Wei-Bin Zhang,system for a full scaled automobile. Previous PATH programsystem for steering on an automobile. Due to their mutual

1992-01-01T23:59:59.000Z

386

Intelligent-controlled doubly fed induction generator system using PFNN  

Science Journals Connector (OSTI)

An intelligent-controlled doubly fed induction generator (DFIG) system using probabilistic fuzzy neural network ( ... the transient and steady-state responses of the DFIG system at different operating conditions....

Faa-Jeng Lin; Yi-Sheng Huang; Kuang-Hsiung Tan

2013-06-01T23:59:59.000Z

387

Software Quality Assurance Control of Existing Systems | Department of  

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

Software Quality Assurance Control of Existing Systems Software Quality Assurance Control of Existing Systems Software Quality Assurance Control of Existing Systems Existing software systems often represent significant investments and play important roles in the every day businesses of organizations. To meet current and future operational needs, organizations need to plan how best to address these support issues. Some of the issues to consider are presented in this document with references to related standards for further detailed examination. Two tutorials, one based on software maintenance and another detailing a baseline recovery strategy are included Software Quality Assurance Control of Existing Systems More Documents & Publications Software Quality Assurance Control of Existing Systems Software Quality: A Guide to Responsibilities and Resources, SQAS

388

Software Quality Assurance Control of Existing Systems | Department of  

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

Assurance Control of Existing Systems Assurance Control of Existing Systems Software Quality Assurance Control of Existing Systems Existing software systems often represent significant investments and play important roles in the every day businesses of organizations. To meet current and future operational needs, organizations need to plan how best to address these support issues. Some of the issues to consider are presented in this document with references to related standards for further detailed examination. Two tutorials, one based on software maintenance and another detailing a baseline recovery strategy are included Software Quality Assurance Control of Existing Systems More Documents & Publications Software Quality Assurance Control of Existing Systems Software Quality: A Guide to Responsibilities and Resources, SQAS

389

Quantifying National Energy Savings Potential of Lighting Controls in  

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

National Energy Savings Potential of Lighting Controls in National Energy Savings Potential of Lighting Controls in Commercial Buildings Title Quantifying National Energy Savings Potential of Lighting Controls in Commercial Buildings Publication Type Report Year of Publication 2012 Authors Williams, Alison A., Barbara A. Atkinson, Karina Garbesi, and Francis M. Rubinstein Pagination 14 Date Published May Publisher LBNL-5895E Abstract Lighting has the largest estimated technical potential for energy savings of any U.S. building end-use. A significant fraction of that potential is believed to lie in lighting system controls. While controls are incorporated in national model building codes, their adoption and enforcement are spotty, and controls have been largely ignored in energy efficiency standards, leaving much potential untapped. The development of sound energy policy with respect to lighting controls depends on improved quantification of potential savings. Researchers have been quantifying energy savings from lighting controls in commercial buildings for more than 30 years, but results vary widely. This meta-analysis of energy savings potential used 240 savings estimates from 88 published sources, categorized into daylighting strategies, occupancy-based strategies, personal tuning, and institutional tuning. Beginning with an average of savings estimates based on the entire literature, this research added successive analytical filters to identify potential biases introduced to the estimates by different analytical approaches. We obtained relatively robust final estimates of average savings: 24% for occupancy, 28% for daylighting, 31% for personal tuning, 36% for institutional tuning, and 38% for combined approaches. Using these data and estimates of current and full penetration of controls, we calculated national energy savings potential on the order of 19%.

390

Hierarchical predictive control of integrated wastewater treatment systems  

Science Journals Connector (OSTI)

The paper proposes an approach to designing the control structure and algorithms for optimising control of integrated wastewater treatment plant-sewer systems (IWWTS) under a full range of disturbance inputs. The optimised control of IWWTS allows for significant cost savings, fulfilling the effluent discharge limits over a long period and maintaining the system in sustainable operation. Due to the specific features of a wastewater system a hierarchical control structure is applied. The functional decomposition leads to three control layers: supervisory, optimising and follow-up. A temporal decomposition that is applied in order to efficiently accommodate the system's multiple time scales leads to further decomposition of the optimising control layer into three control sublayers: slow, medium, and fast. An extended Kalman Filter is used to carry out an estimation of needed but not measured plant states in real time. The robustly feasible model predictive controller produces manipulated variable trajectories based on a dedicated grey box (GB) model of the biological processes and drawing its physical reality from the well known \\{ASM2d\\} model. The GB model parameters are dependant on the plant operating point and therefore are continuously estimated. As it is impossible to efficiently control the plant under all influent conditions that may occur by using one universal control strategy, different control strategies are designed. Recently developed mechanisms for soft switching between the MPC control strategies are applied in order to smooth the state and control transient processes during the switching. The methodologies and algorithms proposed in the paper are validated by simulation based on real data records from a wastewater system located in Kartuzy, northern Poland. The control system was implemented at the case-study site to generate in real time the control actions that were assessed by the plant operators and verified by simulation based on a calibrated plant model.

M.A. Brdys; M. Grochowski; T. Gminski; K. Konarczak; M. Drewa

2008-01-01T23:59:59.000Z

391

THE DISTRIBUTED SPACECRAFT ATTITUDE CONTROL SYSTEM SIMULATOR  

E-Print Network (OSTI)

algorithms are being developed and tested on DSACSS, combining momentum/reaction wheel, control moment gyro a similar purpose -- ball-and-socket joints, for example -- but air bearings yield much lower friction

Hall, Christopher D.

392

Robust control of redundantly actuated dynamical systems  

E-Print Network (OSTI)

of redundant actuation proving the inherent robustness in the control design methodology. A choice of close loop eigenvector set to minimize the feedback gain matrix is suggested. Partial Eigenstructure Assignment methodology is proposed for second order...

Majji, Manoranjan

2006-08-16T23:59:59.000Z

393

Development of a coal cleaning control system  

SciTech Connect

The US Department of Energy selected the Battelle-Electric Power Research Institute-Science Applications International Corporation team to evaluate and develop on-line slurry ash, percent solids, and sulfur analysis instrumentation and process control technology. The project's objectives were (1) to develop an accurate, versatile, easy to use, on-line coal slurry analyzer and (2) to develop control strategies for analysis, control, and optimization of advanced and conventional coal-cleaning plant. The project's scope included (1) the installation of a slurry test loop, ash, percent solids, and sulfur instruments; (2) evaluation of instrument accuracy with various coals, under various slurry conditions; and (3) assessment of the cost and benefits to be derived from on-line analysis and control 12 refs., 40 figs., 16 tabs.

Conkle, H.N.; Barnes, R.H.; Orban, J.E.; Webb, P.R.

1990-03-09T23:59:59.000Z

394

IPNS Chopper Control and Accelerator Interface Systems  

SciTech Connect

Several of the instruments at the Intense Pulsed Neutron Source (IPNS) at Argonne use rotating Fermi choppers. The techniques used to control the speed and phase of these rotating devices are discussed.

Ostrowski, G.E.; Donley, L.I.; Rauchas, A.V.; Volk, G.J.; Jung, E.A.; Haumann, J.R.; Pelizzari, C.A.

1985-01-01T23:59:59.000Z

395

RPP Computer Automated Surveillance System (CASS) to Tank Monitor and Control System (TMACS) transfer project plan  

SciTech Connect

Management plan to ensure the orderly, systematic transfer of alarms from the retired Computer Automated Surveillance System (CASS) to the Tank Monitor and Control System (TMACS).

SHIPLER, C.E.

1999-07-13T23:59:59.000Z

396

On Cyber Security for Networked Control Systems  

E-Print Network (OSTI)

infrastructure systems in the analysis of safety and stability - a significant contribution to the theory of hybrid

Amin, Saurabh

2011-01-01T23:59:59.000Z

397

Distributed Predictive Control and Estimation for Systems with Information  

E-Print Network (OSTI)

constraints and a stationary LQG (Linear Quadratic Gaussian) control law is presented based on the model control and estimation law is demonstrated through a numerical simulation of smart grid. KeywordsDistributed Predictive Control and Estimation for Systems with Information Structures Exemplified

398

ARCHITECTURE AND MAIN HARDWARE COMPONENTS OF THE FEL CONTROL SYSTEM  

E-Print Network (OSTI)

ARCHITECTURE AND MAIN HARDWARE COMPONENTS OF THE FEL CONTROL SYSTEM E.N. Dementiev, V.R. Kozak, E.V. Tararyshkin, A.G. Tribendis, E.N. Shubin, Abstract This article considers the architecture of the control architecture depended on several factors specific to both the facility itself and the control equipment used

Kozak, Victor R.

399

Peak Power Reduction Strategies for the Lighting Systems in Government Buildings  

E-Print Network (OSTI)

presents an approach developed to reduce the peak power demand in the lighting. The approach included optimum use of daylight, time of day control and delamping. The implementation of this approach for eight government buildings with occupancy of between 7...

Al-Nakib, D.; Al-Mulla, A. A.; Maheshwari, G. P.

2010-01-01T23:59:59.000Z

400

Monitored Geologic Repository Operations Monitoring and Control System Description Document  

SciTech Connect

The Monitored Geologic Repository Operations Monitoring and Control System provides supervisory control, monitoring, and selected remote control of primary and secondary repository operations. Primary repository operations consist of both surface and subsurface activities relating to high-level waste receipt, preparation, and emplacement. Secondary repository operations consist of support operations for waste handling and treatment, utilities, subsurface construction, and other selected ancillary activities. Remote control of the subsurface emplacement operations, as well as, repository performance confirmation operations are the direct responsibility of the system. In addition, the system monitors parameters such as radiological data, air quality data, fire detection status, meteorological conditions, unauthorized access, and abnormal operating conditions, to ensure a safe workplace for personnel. Parameters are displayed in a real-time manner to human operators regarding surface and subsurface conditions. The system performs supervisory monitoring and control for both important to safety and non-safety systems. The system provides repository operational information, alarm capability, and human operator response messages during emergency response situations. The system also includes logic control to place equipment, systems, and utilities in a safe operational mode or complete shutdown during emergency response situations. The system initiates alarms and provides operational data to enable appropriate actions at the local level in support of emergency response, radiological protection response, evacuation, and underground rescue. The system provides data communications, data processing, managerial reports, data storage, and data analysis. This system's primary surface and subsurface operator consoles, for both supervisory and remote control activities, will be located in a Central Control Center (CCC) inside one of the surface facility buildings. The system consists of instrument and control equipment and components necessary to provide human operators with sufficient information to monitor and control the operation of the repository in an efficient and safe manner. The system consists of operator consoles and workstations, multiple video display terminals, communications and interfacing equipment, and instrument and control software with customized configuration to meet the needs of the Monitored Geologic Repository (MGR). Process and logic controllers and the associated input/output units of each system interfaced with this system will be configured into Remote Terminal Units (RTU) and located close to the systems to be monitored and controlled. The RTUs are configured to remain operational should communication with CCC operations be lost. The system provides closed circuit television to selectively view systems, operations, and equipment areas and to aid in the operation of mechanical systems. Control and monitoring of site utility systems will be located in the CCC. Site utilities include heating, ventilation, and air conditioning equipment; plant compressed air; plant water; firewater; electrical systems; and inert gases, such as nitrogen, if required. This system interfaces with surface and subsurface systems that either generate output data or require remote control input. The system interfaces with the Site Communications System for bulk storage of operational data, on-site and off-site communication, and a plant-wide public announcement system. The system interfaces with the Safeguards and Security System to provide operational status and emergency alarm indications. The system interfaces with the Site Operation System to provide site wide acquisition of data for analysis and reports, historical information for trends, utility information for plant operation, and to receive operating plans and procedures.

E.F. Loros

2000-06-29T23:59:59.000Z

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


401

Evolution paths of a general control system  

SciTech Connect

Large systems are built by teams of people who communicate through a set of design tools to produce an information model which describes the system. The model can be analyzed for consistency and completeness. A system building methodology based upon this information model can be used for the construction, operation, and maintenance of the system. Operational procedure knowledge derived from operating experience can be used for autonomous operation. Advancing computer technology is improving the engineering tools available in each of these areas. A unified set of such tools provides the maximum amount of computer assistance to the system builders.

Speckert, G.C.

1983-01-01T23:59:59.000Z

402

Maximum power tracking control scheme for wind generator systems  

E-Print Network (OSTI)

The purpose of this work is to develop a maximum power tracking control strategy for variable speed wind turbine systems. Modern wind turbine control systems are slow, and they depend on the design parameters of the turbine and use wind and/or rotor...

Mena, Hugo Eduardo

2009-05-15T23:59:59.000Z

403

Maximum power tracking control scheme for wind generator systems  

E-Print Network (OSTI)

The purpose of this work is to develop a maximum power tracking control strategy for variable speed wind turbine systems. Modern wind turbine control systems are slow, and they depend on the design parameters of the turbine and use wind and/or rotor...

Mena Lopez, Hugo Eduardo

2008-10-10T23:59:59.000Z

404

New trends of visualization in smart production control systems  

Science Journals Connector (OSTI)

The paper reports on first experiences with modern web-based technologies used in building the human-machine interfaces for the industrial automation applications. It mainly focuses on distributed and intelligent manufacturing control systems designed ... Keywords: AJAX, GWT, HTML5, distributed intelligent control, manufacturing, multi-agent systems, ontology, service-oriented architectures, visualization, web application

Pavel Vrba; Petr Kadera; Vclav Jirkovsk; Marek Obitko; Vladimr Ma?k

2011-08-01T23:59:59.000Z

405

Generic planning and control of automated material handling systems  

Science Journals Connector (OSTI)

This paper discusses the problem to design a generic planning and control architecture for automated material handling systems (AMHSs). We illustrate the relevance of this research direction, and then address three different market sectors where AMHSs ... Keywords: Automated material handling systems, Generic control architecture, Real-time scheduling

S. W. A. Haneyah; J. M. J. Schutten; P. C. Schuur; W. H. M. Zijm

2013-04-01T23:59:59.000Z

406

Deception used for Cyber Defense of Control Systems  

SciTech Connect

Control system cyber security defense mechanisms may employ deception to make it more difficult for attackers to plan and execute successful attacks. These deceptive defense mechanisms are organized and initially explored according to a specific deception taxonomy and the seven abstract dimensions of security previously proposed as a framework for the cyber security of control systems.

Wayne F. Boyer; Miles A. McQueen

2009-05-01T23:59:59.000Z

407

Controllers with Minimal Observation Power (Application to Timed Systems)  

E-Print Network (OSTI)

Controllers with Minimal Observation Power (Application to Timed Systems) Peter Bulychev1 , Franck is the computation of a subset of predicates sufficient for control and whose cost is minimal. Our solution avoids, Danish-Chinese Center for Cyber Physical Systems (IDEA4CPS) and VKR Center of Excellence MT-LAB. #12;The

David, Alexandre

408

Research challenges for the security of control systems  

Science Journals Connector (OSTI)

In this paper we attempt to answer two questions: (1) Why should we be interested in the security of control systems? And (2) What are the new and fundamentally different requirements and problems for the security of control systems? We also propose ...

Alvaro A. Crdenas; Saurabh Amin; Shankar Sastry

2008-07-01T23:59:59.000Z

409

THE SNS CRYOGENIC CONTROL SYSTEM: EXPERIENCES IN COLLABORATION [1  

E-Print Network (OSTI)

WEAP013 THE SNS CRYOGENIC CONTROL SYSTEM: EXPERIENCES IN COLLABORATION [1] W. H. Strong, P. A. Gurd Abstract The cryogenic system for the Spallation Neutron Source (SNS) is designed by Jefferson Laboratory, and software tools. The cryogenic system is the first SNS system to be developed using SNS standards

410

Hydrazine engine start system air start performance and controls sizing  

SciTech Connect

Hydrazine has been used as an energy source in many applications to fuel in-flight main engine starting. In a current application, an existing hydrazine engine start system (ESS) design was adapted to meet new fuel control requirements. This paper presents a brief system description, historical context, and the motivating factors for the hydrazine controls changes and three case studies of controls design and analysis from the ESS program. 4 refs.

Johnson, A.T.

1992-01-01T23:59:59.000Z

411

High performance control of harmonic instability from HVDC link system  

SciTech Connect

This paper investigates the usefulness of novel control method for HVDC link system which suffers from severe condition of low order harmonic. This control scheme is used the feedforward control method which is directly controlled dc current at dc link system. The studies of this paper are aimed to improving the dynamic response of HVdc link system in disturbances such as faults. To achieve those objectives, digital time domain simulations are employed by the electro magnetic transient program for dc system (EMTDC). This method results in stable recovery from faults at both rectifier and inverter terminal busbars for a HVdc system that is inherently unstable. It has been found to be robust and control performance has been enhanced.

Min, W.K.; Yoo, M.H. [Korea Electric Power Research Inst., Taejeon (Korea, Republic of)

1995-12-31T23:59:59.000Z

412

LANSCE Drift Tube Linac Water Control System Refurbishment  

SciTech Connect

There are several refurbishment projects underway at the Los Alamos National Laboratory LANSCE linear accelerator. Systems involved are: RF, water cooling, networks, diagnostics, timing, controls, etc. The Drift Tube Linac (DTL) portion of the accelerator consists of four DTL tanks, each with three independent water control systems. The systems are about 40 years old, use outdated and non-replaceable equipment and NIM bin control modules, are beyond their design life and provide unstable temperature control. Insufficient instrumentation and documentation further complicate efforts at maintaining system performance. Detailed design of the replacement cooling systems is currently in progress. Previous design experience on the SNS accelerator water cooling systems will be leveraged, see the SNS DTL FDR. Plans call for replacement of water piping, manifolds, pumps, valves, mix tanks, instrumentation (flow, pressure and temperature) and control system hardware and software. This presentation will focus on the control system design with specific attention on planned use of the National Instruments Compact RIO platform with the Experimental Physics and Industrial Control system (EPICS) software toolkit.

Marroquin, Pilar S. [Los Alamos National Laboratory

2011-01-01T23:59:59.000Z

413

The Los Alamos VXI-based modular RF control system  

SciTech Connect

This paper describes the design and implementation of the Los Alamos modular RF control system, which provides high-performance feedback and/or feedforward control of RF accelerator cavities. This is a flexible, modular control system which has been realized in the industry-standard VXI cardmodular format. A wide spectrum of system functionality can be accommodated simply by incorporating only those modules and features required for a particular application. The fundamental principles of the design approach are discussed. Details of the VXI implementation are given, including the system architecture and interfaces, performance capabilities, and available features.

Jachim, S.P.; Ziomek, C.; Natter, E.F.; Regan, A.H.; Hill, J.; Eaton, L.; Gutscher, W.D.; Curtin, M.; Denney, P.; Hansberry, E.; Brooks, T.

1993-01-01T23:59:59.000Z

414

The Los Alamos VXI-based modular RF control system  

SciTech Connect

This paper describes the design and implementation of the Los Alamos modular RF control system, which provides high-performance feedback and/or feedforward control of RF accelerator cavities. This is a flexible, modular control system which has been realized in the industry-standard VXI cardmodular format. A wide spectrum of system functionality can be accommodated simply by incorporating only those modules and features required for a particular application. The fundamental principles of the design approach are discussed. Details of the VXI implementation are given, including the system architecture and interfaces, performance capabilities, and available features.

Jachim, S.P.; Ziomek, C.; Natter, E.F.; Regan, A.H.; Hill, J.; Eaton, L.; Gutscher, W.D.; Curtin, M.; Denney, P.; Hansberry, E.; Brooks, T.

1993-06-01T23:59:59.000Z

415

Closed-loop focus control system for laser welding  

SciTech Connect

In this paper the authors describe a focus control system for Nd:YAG laser welding based on an optical sensor incorporated into the fibre delivery system to detect light generated by the process. This broadband light is separated into two wavelength bands, and simple electronic processing gives a signal proportional to focal error, as a result of chromatic aberrations in the optical delivery system. Focus control is demonstrated for bead-on-plate welds in different thicknesses of titanium alloy, aluminum alloy, mild steel and stainless steel. The control system works for both pulsed and continuous laser radiation.

Haran, F.M.; Hand, D.P.; Jones, J.D.C. [Heriot-Watt Univ., Edinburgh (United Kingdom); Peters, C. [Lumonics Ltd., Rugby (United Kingdom)

1996-12-31T23:59:59.000Z

416

Integrated intelligent systems in advanced reactor control rooms  

SciTech Connect

An intelligent, reactor control room, information system is designed to be an integral part of an advanced control room and will assist the reactor operator's decision making process by continuously monitoring the current plant state and providing recommended operator actions to improve that state. This intelligent system is an integral part of, as well as an extension to, the plant protection and control systems. This paper describes the interaction of several functional components (intelligent information data display, technical specifications monitoring, and dynamic procedures) of the overall system and the artificial intelligence laboratory environment assembled for testing the prototype. 10 refs., 5 figs.

Beckmeyer, R.R.

1989-01-01T23:59:59.000Z

417

In-situ control system for atomization  

DOE Patents (OSTI)

Melt atomizing apparatus comprising a melt supply orifice for supplying the melt for atomization and gas supply orifices proximate the melt supply orifice for supplying atomizing gas to atomize the melt as an atomization spray. The apparatus includes a sensor, such as an optical and/or audio sensor, for providing atomization spray data, and a control unit responsive to the sensed atomization spray data for controlling at least one of the atomizing gas pressure and an actuator to adjust the relative position of the gas supply orifice and melt supply in a manner to achieve a desired atomization spray.

Anderson, Iver E. (Ames, IA); Figliola, Richard S. (Central, SC); Terpstra, Robert L. (Ames, IA)

1995-06-13T23:59:59.000Z

418

COMMON VULNERABILITIES IN CRITICAL INFRASTRUCTURE CONTROL SYSTEMS  

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

enforcement and auditing. Page 114 SECURITY POLICY Figure 1. PCS administration. A security plan documents the overall security architecture for a system or subsystem. Typical...

419

Particulate Emissions Control by Advanced Filtration Systems...  

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

Advanced Filtration Systems for GDI Engines (ANLCorningHyundai CRADA) June 19, 2014 DOE Annual Merit Review & Peer Evaluation Meeting PI: Kyeong Lee Co-investigators: Seung Choi,...

420

Control Engineering Practice 12 (2004) 987988 Emerging technologies for active noise and vibration control systems  

E-Print Network (OSTI)

and vibration control systems Noise and vibration are often limiting factors in performance of many industrial be of little use at lower frequencies. Active noise and vibration control (ANVC) systems have emerged as viable-dimensional enclosure. One of the panels of the enclosure is vibrated, hence generating acoustic noise inside

Pota, Himanshu Roy

Note: This page contains sample records for the topic "daylighting control 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

Efficient memory control for avionics and embedded systems  

Science Journals Connector (OSTI)

Modern aircrafts have seen a significant growth of avionics systems. Most of new aircrafts have systems for navigation, automatic flight control, collision avoidance systems, flight data recorder, weather radar system as well as communication and monitoring systems. All of these systems use embedded computer systems with increasing memory requirements. In order to reduce the electricity consumed by these systems, we suggest detecting the portion of the computer memory that is actually used. The other portion can be temporarily shut down and turned on again when needed. Such a shut down can notably reduce the electricity consumption of the avionics systems.

Pinchas Weisberg; Yair Wiseman

2013-01-01T23:59:59.000Z

422

DOE and Industry Showcase New Control Systems Security Technologies at  

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

Technology Development » Energy Delivery Systems Technology Development » Energy Delivery Systems Cybersecurity » Control Systems Security News Archive » DOE and Industry Showcase New Control Systems Security Technologies at DistribuTECH DOE and Industry Showcase New Control Systems Security Technologies at DistribuTECH DistribuTECH Conference Tuesday-Thursday, March 23-25, 2010 Tampa Convention Center Booth #231 Tampa, FL Join the Department of Energy and its industry partners as they showcase six new products and technologies designed to secure the nation's energy infrastructure from cyber attack on Tuesday through Thursday, March 23-25. Visit Booth #231 at the DistribuTECH 2010 Conference & Exhibition in Tampa, FL, to see first-hand demonstrations of several newly commercialized control systems security products-each developed through a

423

Energy-Efficient Building HVAC Control Using Hybrid System LBMPC  

E-Print Network (OSTI)

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

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

2012-01-01T23:59:59.000Z

424

Process control monitoring systems, industrial plants, and process control monitoring methods  

DOE Patents (OSTI)

A system comprises a valve; a plurality of RFID sensor assemblies coupled to the valve to monitor a plurality of parameters associated with the valve; a control tag configured to wirelessly communicate with the respective tags that are coupled to the valve, the control tag being further configured to communicate with an RF reader; and an RF reader configured to selectively communicate with the control tag, the reader including an RF receiver. Other systems and methods are also provided.

Skorpik, James R [Kennewick, WA; Gosselin, Stephen R [Richland, WA; Harris, Joe C [Kennewick, WA

2010-09-07T23:59:59.000Z

425

One IBM Plant's Approach to Automated Control System Standards  

E-Print Network (OSTI)

ONE IBM PLANT'S APPROACH"TO AUTOMATED CONTROL SYSTEM STANDARDS John P. Cilia International Business Machines Corporation Poughkeepsie, New York ABSTRACT INSTRUMENTATION STANDARDS The trend toward lower cost of new technologies in building... Facilities Automation Control System (IPDFACS) standards used in the bidding process, the philosophy behind them, the type of instrumentation specified to be installed, and how to maintain this complex DDDC system. INTRODUCTION The lower cost of chips...

Cilia, J. P.

426

Advanced Burners and Combustion Controls for Industrial Heat Recovery Systems  

E-Print Network (OSTI)

ADVANCED BURNERS AND COMBUSTION CONTROLS FOR INDUSTRIAL HEAT RECOVERY SYSTEMS J.L.FERRI GTE PRODUCTS CORPORATION TOWANDA, PA ABSTRACT When recuperators are installed on indus trial furnaces, burners and ratio control systems must... recuperators by demonstrating their technical and economi cal feasibility in well monitored field installations (1). During the contract, it became evident to GTE that a systems approach (recuperator, burner, and con troIs) is necessary to be accepted...

Ferri, J. L.

427

System to control contamination during retrieval of buried TRU waste  

DOE Patents (OSTI)

A system to control contamination during the retrieval of hazardous waste comprising an outer containment building, an inner containment building, within the outer containment building, an electrostatic radioactive particle recovery unit connected to and in communication with the inner and outer containment buildings, and a contaminate suppression system including a moisture control subsystem, and a rapid monitoring system having the ability to monitor conditions in the inner and outer containment buildings.

Menkhaus, Daniel E. (Idaho Falls, ID); Loomis, Guy G. (Idaho Falls, ID); Mullen, Carlan K. (Idaho Falls, ID); Scott, Donald W. (Idaho Falls, ID); Feldman, Edgar M. (Idaho Falls, ID); Meyer, Leroy C. (Idaho Falls, ID)

1993-01-01T23:59:59.000Z

428

THE SNS VACUUM CONTROL SYSTEM UPGRADE FOR THE SUPERCONDUCTING LINAC  

SciTech Connect

The superconducting linac of the Spallation Neutron Source (SNS) has 23 cryomodules whose vacuum system is monitored and controlled by custom built hardware. The original control hardware was provided by Thomas Jefferson National Accelerator Facility (JLab) and contained a variety of custom boards utilizing integrated circuits to perform logic. The need for control logic changes, a desire to increase maintainability, and a desire to increase flexibility to adapt for the future has led to a Programmable Logic Controller (PLC) based upgrade. This paper provides an overview of the commercial off-the-shelf (COTS) hardware being used in the superconducting vacuum control system. Details of the design and challenges to convert a control system during small windows of maintenance periods without disrupting beam operation will be covered in this paper.

Williams, Derrick C [ORNL] [ORNL

2009-01-01T23:59:59.000Z

429

Building Automation and Controls Systems: Integrated Room Control for Personalized Comfort and Increased ROI  

E-Print Network (OSTI)

Smart Room Control ESL-IC-14-09-05 Proceedings of the 14th International Conference for Enhanced Building Operations, Beijing, China, September 14-17, 2014 Agenda ? Room Control fundamentals and evolution ? Challenges ? The Smart Room Control... approach ? Benefits ? Market applications ? Typical Configurations ? Summary ESL-IC-14-09-05 Proceedings of the 14th International Conference for Enhanced Building Operations, Beijing, China, September 14-17, 2014 Room Control System Fundamentals ? HVAC...

Gill, D.

2014-01-01T23:59:59.000Z

430

Control system and method for a hybrid electric vehicle  

DOE Patents (OSTI)

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

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

2001-01-01T23:59:59.000Z

431

Control sensitivity indices for stability analysis of HVdc systems  

SciTech Connect

This paper presents a new concept called the ``Control Sensitivity Index`` of CSI, for the stability analysis of HVdc converters connected to weak ac systems. The CSI for a particular control mode can be defined as the ratio of incremental changes in the two system variables that are most relevant to that control mode. The index provides valuable information on the stability of the system and, unlike other approaches, aids in the design of the controller. It also plays an important role in defining non-linear gains for the controller. This paper offers a generalized formulation of CSI and demonstrates its application through an analysis of the CSI for three modes of HVdc control. The conclusions drawn from the analysis are confirmed by a detailed electromagnetic transients simulation of the ac/dc system. The paper concludes that the CSI can be used to improve the controller design and, for an inverter in a weak ac system, the conventional voltage control mode is more stable than the conventional {gamma} control mode.

Nayak, O.B.; Gole, A.M. [Univ. of Manitoba, Winnipeg, Manitoba (Canada)] [Univ. of Manitoba, Winnipeg, Manitoba (Canada); Chapman, D.G.; Davies, J.B. [Manitoba Hydro, Winnipeg, Manitoba (Canada)] [Manitoba Hydro, Winnipeg, Manitoba (Canada)

1995-10-01T23:59:59.000Z

432

SPS access control system a new user interface  

E-Print Network (OSTI)

This document describes the project to implement at CERN new trends in industrial control systems and integrate new requirements and functions requested by users. This project will be the testing ground for the specification of procedures in the Access Control and Machine Interlock of LHC. The last modification in the Access Control System to the primary beam areas was made in 1995, and this new project is to improve the fields of personal security, access security and the introduction of modern communication networks used in the industrial control systems. Inside the cycle model of project life, it is at the present time in the test phase in terms of security and exploitation inside the Accelerator Decelerator (AD) project. The presence of Authorization Management System (AMS) to guarantee the automatic information distribution of authorizations to controlled areas is in line with this project.

Riesco, T

1999-01-01T23:59:59.000Z

433

A vital component of modern manufacturing systems is the scheduling and control system, which determines com-  

E-Print Network (OSTI)

264 Abstract A vital component of modern manufacturing systems is the scheduling and control system" to the unexpected system changes. Keywords: Scheduling and Control, Simulation Methods and Models Introduction iterative simulation-based scheduling mechanisms for manufacturing systems that operate in dynamic

Kutanoglu, Erhan

434

Fuzzy Logic Traction Controllers And Their Effect On Longitudinal Vehicle Platoon Systems  

E-Print Network (OSTI)

the plant. Figure 27 depicts the fuzzy logic control system.Figure 27: Fuzzy Logic Control System Fuzzification: Duringcontrol makes a fuzzy-logic control approach appealing (

Bauer, M.; Tomizuka, M.

1995-01-01T23:59:59.000Z

435

Occupant Response to Window Control Signaling Systems  

E-Print Network (OSTI)

of sustainable design practices and create a building thatdesignteamorbuildingmanager,which describedthesignalingsysteminthecontextofalloftheothersustainable

Ackerly, Katherine

2012-01-01T23:59:59.000Z

436

A persuasive GPS-controlled thermostat system  

E-Print Network (OSTI)

Using 10 weeks of data from a couple living in an instrumented home, we report on the potential of context-aware power management for energy saving. We identify an opportunity to save on heating and cooling using a system ...

Gupta, Manu, S. M. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

437

Occupant Response to Window Control Signaling Systems  

E-Print Network (OSTI)

AirConditioning Fancoilunits,variablerefrigerantactivecoolingviafancoilunitsandradiantpanels,systemtoperimeterfancoilunits,andopen modefor

Ackerly, Katherine

2012-01-01T23:59:59.000Z

438

Engine control system having fuel-based adjustment  

DOE Patents (OSTI)

A control system for an engine having a cylinder is disclosed having an engine valve configured to affect a fluid flow of the cylinder, an actuator configured to move the engine valve, and an in-cylinder sensor configured to generate a signal indicative of a characteristic of fuel entering the cylinder. The control system also has a controller in communication with the actuator and the sensor. The controller is configured to determine the characteristic of the fuel based on the signal and selectively regulate the actuator to adjust a timing of the engine valve based on the characteristic of the fuel.

Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

2011-03-15T23:59:59.000Z

439

Engine control system having fuel-based timing  

DOE Patents (OSTI)

A control system for an engine having a cylinder is disclosed having an engine valve movable to regulate a fluid flow of the cylinder and an actuator associated with the engine valve. The control system also has a sensor configured to generate a signal indicative of an amount of an air/fuel mixture remaining within the cylinder after completion of a first combustion event and a controller in communication with the actuator and the sensor. The controller may be configured to compare the amount with a desired amount, and to selectively regulate the actuator to adjust a timing of the engine valve associated with a subsequent combustion event based on the comparison.

Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

2012-04-03T23:59:59.000Z

440

Control Algorithms for Grid-Scale Battery Energy Storage Systems  

E-Print Network (OSTI)

Control Algorithms for Grid-Scale Battery Energy Storage Systems This report describes development-connected battery energy storage system. The report was submitted by HNEI to the U.S. Department of Energy Office.2: Energy Storage Systems August 2014 HAWAI`I NATURAL ENERGY INSTITUTE School of Ocean & Earth Science

Note: This page contains sample records for the topic "daylighting control 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

Managing Uncertainty in Operational Control of Water Distribution Systems  

E-Print Network (OSTI)

Managing Uncertainty in Operational Control of Water Distribution Systems A. Bargiela Department. There are system management decisions concerning the regulatory measures such as water pricing principles, effluent in water distribution systems con- cern reservoir(s) management with associated pump scheduling

Bargiela, Andrzej

442

Power control system for a hot gas engine  

DOE Patents (OSTI)

A power control system for a hot gas engine of the type in which the power output is controlled by varying the mean pressure of the working gas charge in the engine has according to the present invention been provided with two working gas reservoirs at substantially different pressure levels. At working gas pressures below the lower of said levels the high pressure gas reservoir is cut out from the control system, and at higher pressures the low pressure gas reservoir is cut out from the system, thereby enabling a single one-stage compressor to handle gas within a wide pressure range at a low compression ratio.

Berntell, John O. (Staffanstorp, SE)

1986-01-01T23:59:59.000Z

443

IMPROVEMENTS TO THE CRYOGENIC CONTROL SYSTEM ON DIII-D  

SciTech Connect

OAK-B135 The cryogenic facility that is part of the DIII-D tokamak system supplies liquid nitrogen and liquid helium to the superconducting magnets used for electron cyclotron heating, the D{sub 2} pellet injection system, cryopumps in the DIII-D vessel, and cryopanels in the neutral beam injection system. The liquid helium is liquefied on site using a Sulzer liquefier that has a 150 l/h liquefaction rate. Control of the cryogenic facility at DIII-D was initially accomplished through the use of three different programmable logic controllers (PLCs). Recently, two of those three PLCs, a Sattcon PLC controlling the Sulzer liquefier and a Westinghouse PLC, were removed and all their control logic was merged into the remaining PLC, a Siemens T1555. This replacement was originally undertaken because the removed PLCs were obsolete and unsupported. However, there have been additional benefits from the replacement. The replacement of the RS-232 serial links between the graphical user interface and the PLCs with a high speed Ethernet link allows for real-time display and historical trending of nearly all the cryosystem's data. this has greatly increased the ability to troubleshoot problems with the system, and has permitted optimization of the cryogenic system's performance because of the increased system integration. To move the control logic of the Sattcon control loops into the T1555, an extensive modification of the basic PID control was required. These modifications allow for better control of the control loops and are now being incorporated in other control loops in the system.

HOLTROP,K.L; ANDERSON,P.M; MAUZEY,P.S

2003-10-01T23:59:59.000Z

444

Robustness of discrete-time control systems  

E-Print Network (OSTI)

. The Bilinear Approach s-Plane to z-Plane F. Overbounding and Testing for Stability G. Interlacing Properties of Interval Polynomials Interlacing Property for Continuous- Time Systems Interlacing Property for Discrete- Time Systems Page 26 27 29 33... of p(z) from F(+t) Calculation of s+q Calculation of s~i Calculation of the Minimum Distance of p(z) from P&? Calculation of s Calculation of s Calculation of the Minimum Distance of p(z) from Flsi Calculation of ss Calculation of ss E...

Aguirre, Gabriel

1989-01-01T23:59:59.000Z

445

Energy Saving in Office Building by Floor Integration System: Reducing  

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

Energy Saving in Office Building by Floor Integration System: Reducing Energy Saving in Office Building by Floor Integration System: Reducing Total Energy of HVAC and Lighting system using daylight Speaker(s): Yoshifumi Murakami Date: May 20, 2004 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Naoya Motegi Information Technology that is featured by standard communication protocol like Lon Works, BACnet is very useful for managing building systems. Now we can collect much data quickly and easily and to analyze them in detail with this technology. Under the circumstances in that saving energy and reducing CO2 are required strongly, important thing is finding the effective information for building operation and control from collected data and the analysis of them. In our project, the floor integration controller that integrates the each building systems was proposed. It

446

Chapter 7 - Hacking Industrial Control Systems  

Science Journals Connector (OSTI)

Abstract An in-depth discussion on how an industrial network might be attacked, including possible target systems, and the potential consequences should those targets be compromised. Learn how a hacker thinks, how malware works, and what to do if your industrial network becomes infected.

Eric D. Knapp; Joel Thomas Langill

2015-01-01T23:59:59.000Z

447

Autonomous Thermal Control System Omid Ardakanian  

E-Print Network (OSTI)

18-24% of all energy usage. Building energy management can reduce both its operating costs and its- and middle-income countries, energy is mostly gener- ated from fossil fuel, directly contributing to global system in terms of energy efficiency. 1. Introduction Energy consumption of residential and commercial

Waterloo, University of

448

Advanced Power Systems and Controls Laboratory  

E-Print Network (OSTI)

photovoltaic generation facility. Solar panel output is in white, and the response of the XP DPR is in red Solar Power Generation Introduction The rapid growth of wind and solar power is a key driver of the development of grid-scale Battery Energy Storage Systems (BESS). A well implemented BESS co-located with solar

Ben-Yakar, Adela

449

Engine control system having pressure-based timing  

DOE Patents (OSTI)

A control system for an engine having a first cylinder and a second cylinder is disclosed having a first engine valve movable to regulate a fluid flow of the first cylinder and a first actuator associated with the first engine valve. The control system also has a second engine valve movable to regulate a fluid flow of the second cylinder and a sensor configured to generate a signal indicative of a pressure within the first cylinder. The control system also has a controller that is in communication with the first actuator and the sensor. The controller is configured to compare the pressure within the first cylinder with a desired pressure and selectively regulate the first actuator to adjust a timing of the first engine valve independently of the timing of the second engine valve based on the comparison.

Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

2011-10-04T23:59:59.000Z

450

Restricted Complexity Framework for Nonlinear Adaptive Control in Complex Systems  

SciTech Connect

Control law adaptation that includes implicit or explicit adaptive state estimation, can be a fundamental underpinning for the success of intelligent control in complex systems, particularly during subsystem failures, where vital system states and parameters can be impractical or impossible to measure directly. A practical algorithm is proposed for adaptive state filtering and control in nonlinear dynamic systems when the state equations are unknown or are too complex to model analytically. The state equations and inverse plant model are approximated by using neural networks. A framework for a neural network based nonlinear dynamic inversion control law is proposed, as an extrapolation of prior developed restricted complexity methodology used to formulate the adaptive state filter. Examples of adaptive filter performance are presented for an SSME simulation with high pressure turbine failure to support extrapolations to adaptive control problems.

Williams, Rube B. [Los Alamos National Laboratory, P.O. Box 1663, MS K575, Los Alamos, NM 87545 (United States)

2004-02-04T23:59:59.000Z

451

Force control system design for aerodynamic load simulator  

Science Journals Connector (OSTI)

A dynamic load simulator which can reproduce on-ground the aerodynamic hinge moment of control surface is an essential rig for the performance and stability test of an aircraft actuation system. The hinge moment varies widely over the flight envelope depending on the specific flight condition and maneuvering status. To replicate the wide spectrum of this hinge moment variation within some accuracy bounds, a force controller is designed based on the quantitative feedback theory (QFT). A dynamic model of load actuation system is derived, and verified through the experiment. The efficacy of QFT force controller is verified by a numerical simulation, in which combined aircraft dynamics, flight control law and hydraulic actuation system dynamics of aircraft control surface are considered.

Yoonsu Nam; Sung Kyung Hong

2002-01-01T23:59:59.000Z

452

Ammonia-Free NOx Control System  

SciTech Connect

Research is being conducted under United States Department of Energy (DOE) Contract DEFC26-03NT41865 to develop a new technology to achieve very low levels of NOx emissions from pulverized coal fired boiler systems by employing a novel system level integration between the PC combustion process and the catalytic NOx reduction with CO present in the combustion flue gas. The combustor design and operating conditions will be optimized to achieve atypical flue gas conditions. This approach will not only suppress NOx generation during combustion but also further reduce NOx over a downstream catalytic reactor that does not require addition of an external reductant, such as ammonia. This report describes the work performed during the January 1 to March 31, 2004 time period.

S. Wu; Z. Fan; R. Herman

2004-03-31T23:59:59.000Z

453

Ammonia-Free NOx Control System  

SciTech Connect

Research is being conducted under United States Department of Energy (DOE) Contract DEFC26-03NT41865 to develop a new technology to achieve very low levels of NOx emissions from pulverized coal fired boiler systems by employing a novel system level integration between the PC combustion process and the catalytic NOx reduction with CO present in the combustion flue gas. The combustor design and operating conditions will be optimized to achieve atypical flue gas conditions. This approach will not only suppress NOx generation during combustion but also further reduce NOx over a downstream catalytic reactor that does not require addition of an external reductant, such as ammonia. This report describes the work performed during the October 1 to December 31, 2003 time period.

S. Wu

2003-12-31T23:59:59.000Z

454

Vulnerability Analysis of Energy Delivery Control Systems - 2011 |  

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

Vulnerability Analysis of Energy Delivery Control Systems - 2011 Vulnerability Analysis of Energy Delivery Control Systems - 2011 Vulnerability Analysis of Energy Delivery Control Systems - 2011 Cybersecurity for energy delivery systems has emerged as one of the Nation's most serious grid modernization and infrastructure protection issues. Cyber adversaries are becoming increasingly targeted, sophisticated, and better financed. The energy sector must research, develop and deploy new cybersecurity capabilities faster than the adversary can launch new attack tools and techniques. The goal of the U.S. Department of Energy Office of Electricity Delivery and Energy Reliability (DOE/OE) National Supervisory Control and Data Acquisition (SCADA) Test Bed (NSTB) program is to enhance the reliability and resiliency of the Nation's energy infrastructure by reducing the risk

455

Model Specification for Networked Outdoor Lighting Control Systems  

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

The DOE Municipal Solid-State Street Lighting Consortium's Model Specification for Networked Outdoor Lighting Control Systems is a tool designed to help cities, utilities, and other local agencies...

456

Emission Control Systems and Components for Retrofit and First...  

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

of Advanced Emission Controls for the Retrofit Market Development of a Stand-Alone Urea-SCR System for NOx Reduction in Marine Diesel Engines HD Truck and Engine Fuel Efficiency...

457

Control system design for a parallel hybrid electric vehicle  

E-Print Network (OSTI)

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

Buntin, David Leighton

1994-01-01T23:59:59.000Z

458

Decentralized model predictive control of a multiple evaporator HVAC system  

E-Print Network (OSTI)

Vapor compression cooling systems are the primary method used for refrigeration and air conditioning, and as such are a major component of household and commercial building energy consumption. Application of advanced control techniques...

Elliott, Matthew Stuart

2009-05-15T23:59:59.000Z

459

Decentralized Control of Infinite Systems Gabriel Kalyon Tristan Le Gall  

E-Print Network (OSTI)

Decentralized Control of Infinite Systems Gabriel Kalyon · Tristan Le Gall · Herv´e Marchand. Marchand INRIA, Centre Rennes - Bretagne Atlantique E-mail: herve.marchand@inria.fr G. Kalyon is supported

Paris-Sud XI, Université de

460

Adaptive swing-up and balancing control of acrobot systems  

E-Print Network (OSTI)

The field of underactuated robotics has become the core of agile mobile robotics research. Significant past effort has been put into understanding the swing-up control of the acrobot system. This thesis implements an online, ...

Johnson, Luke B

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "daylighting control 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

The design and implementation of a demonstration supplementary control system  

E-Print Network (OSTI)

The overall goal of the Chestnut Ridge Supplemental Control System (SCS) demonstration project was to demonstrate how an existing monitoring network, existing air quality models, and existing meteorological forecasting ...

Ruane, Michael Frederick

1980-01-01T23:59:59.000Z

462

Control Strategy for Wind and Solar Hybrid Generation System  

Science Journals Connector (OSTI)

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

Xin Gao

2011-01-01T23:59:59.000Z

463

Using Building Control System for Commissioning  

E-Print Network (OSTI)

France-USA Finland France Japan USA Netherlands Main End-Users BOp MC ES BD BOp BI BOp MC ES BOp BOw BS BOp ES BOp MC ES MI CA BOp MC ES BOp Type building Large commercial buildings Any types Medium and large commercial... 34, VTT, Finland, ISBN 951-38-5725-5. [4] Castro, N.S., Galler, M. A., Bushby, S. T. ?A Test Shell for Developing Automated Commissioning Tools for BACnet Systems? National Conference on Building Commissioning, 2003. ...

Vaezi-Nejad, H.; Salsbury, T.; Choiniere, D.

2004-01-01T23:59:59.000Z

464

Study on Electric Control System for a Full Hybrid Bus  

Science Journals Connector (OSTI)

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

Zhiguo Kong; Hongxiu Wang

2013-07-01T23:59:59.000Z

465

Assessing the Control Systems Capacity for Demand Response in  

E-Print Network (OSTI)

LBNL-5319E Assessing the Control Systems Capacity for Demand Response in California Industries in this report was coordinated by the Demand Response Research Center and funded by the California Energy of the Demand Response Research Center Industrial Controls Experts Working Group: · Jim Filanc, Southern

466

Use of a Machine Control & Guidance System Determination of Performance  

E-Print Network (OSTI)

1 Use of a Machine Control & Guidance System Determination of Performance Protection against. Dr. P. Rausch Why Machine Guidance? 1 Introduction Machine Guidance allows higher performance. Higher someone checking down below: 09.07.2008 3 ,,Machine control by shout and gesture". Planned Excavator Job

467

PROGRAMME SPECIFICATION POSTGRADUATE PROGRAMMES Programme name Systems and Control Engineering  

E-Print Network (OSTI)

Engineering Award MSc School School of Engineering and Mathematical Sciences Department or equivalent School of Engineering and Mathematical Sciences Programme code PSSYCO Type of study Full Time Part Time Total UK credits, linear and non-linear systems, optimisation and optimal control and advanced control techniques as well

Weyde, Tillman

468

Design for Control System of Wastegate Valve Actuator in Turbocharger  

Science Journals Connector (OSTI)

This paper has designed a set of control system of waste gate valve actuator in turbocharger, it enables the waste gate valve regulate the exhaust flow before turbo automatically according to the operating condition of engine, so it can lower the pressure ... Keywords: wastegate valve, electronic control, design, test

Liu Xinghua; Yu Lei; Liu Fushui; Wu Wenfeng; Wang Ruwei

2010-12-01T23:59:59.000Z

469

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

470

Neutron economic reactivity control system for light water reactors  

DOE Patents (OSTI)

A neutron reactivity control system for a LWBR incorporating a stationary seed-blanket core arrangement. The core arrangement includes a plurality of contiguous hexagonal shaped regions. Each region has a central and a peripheral blanket area juxapositioned an annular seed area. The blanket areas contain thoria fuel rods while the annular seed area includes seed fuel rods and movable thoria shim control rods.

Luce, Robert G. (Glenville, NY); McCoy, Daniel F. (Latham, NY); Merriman, Floyd C. (Rotterdam, NY); Gregurech, Steve (Scotia, NY)

1989-01-01T23:59:59.000Z

471

Vibration Control of Multi-Mode Rotor-Bearing Systems  

Science Journals Connector (OSTI)

8 March 1983 research-article Vibration Control of Multi-Mode Rotor-Bearing...least-squares method to minimize the vibration of any general rotor-bearing system...to implement the open-loop adaptive vibration control strategies outlined in the paper...

1983-01-01T23:59:59.000Z

472

Advanced Instrumentation, Information, and Control Systems Technologies Technical Program Plan  

SciTech Connect

Reliable instrumentation, information, and control (II&C) systems technologies are essential to ensuring safe and efficient operation of the U.S. light water reactor (LWR) fleet. These technologies affect every aspect of nuclear power plant (NPP) and balance-of-plant operations. In 1997, the National Research Council conducted a study concerning the challenges involved in modernization of digital instrumentation and control systems in NPPs. Their findings identified the need for new II&C technology integration.

Bruce Hallbert

2012-09-01T23:59:59.000Z

473

Projective synchronization in fractional order chaotic systems and its control  

E-Print Network (OSTI)

The chaotic dynamics of fractional (non-integer) order systems have begun to attract much attention in recent years. In this paper, we study the projective synchronization in two coupled fractional order chaotic oscillators. It is shown that projective synchronization can also exist in coupled fractional order chaotic systems. A simple feedback control method for controlling the scaling factor onto a desired value is also presented.

Chunguang Li

2006-04-24T23:59:59.000Z

474

An interactive performance-based expert system for daylighting in architectural design  

E-Print Network (OSTI)

Design practitioners are increasingly using digital tools during the design process; however, building performance simulation continues to be more commonly utilized for analysis rather than as a design aid. Additionally, ...

Gagne, Jaime M. L. (Jaime Michelle Lee)

2011-01-01T23:59:59.000Z

475

Advanced Controls and Sustainable Systems for Residential Ventilation  

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

Advanced Controls and Sustainable Systems for Residential Ventilation Advanced Controls and Sustainable Systems for Residential Ventilation Title Advanced Controls and Sustainable Systems for Residential Ventilation Publication Type Report LBNL Report Number LBNL-5968E Year of Publication 2012 Authors Turner, William J. N., and Iain S. Walker Date Published 12/2012 Keywords ashrae standard 62,2, california title 24, passive ventilation, residential ventilation, ventilation controller Abstract Whole-house ventilation systems are becoming commonplace in new construction, remodeling/renovation, and weatherization projects, driven by combinations of specific requirements for indoor air quality (IAQ), health, and compliance with standards, such as ASHRAE 62.2. At the same time we wish to reduce the energy use in homes and therefore minimize the energy used to provide ventilation. This study examined several approaches to reducing the energy requirements of providing acceptable IAQ in residential buildings. Two approaches were taken. The first used RIVEC - the Residential Integrated VEntilation Controller - a prototype ventilation controller that aims to deliver whole-house ventilation rates that comply with ventilation standards, for the minimum use of energy. The second used passive and hybrid ventilation systems, rather than mechanical systems, to provide whole-house ventilation.

476

Bringing Control System User Interfaces to the Web  

SciTech Connect

With the evolution of web based technologies, especially HTML5 [1], it becomes possible to create web-based control system user interfaces (UI) that are cross-browser and cross-device compatible. This article describes two technologies that facilitate this goal. The first one is the WebOPI [2], which can seamlessly display CSS BOY [3] Operator Interfaces (OPI) in web browsers without modification to the original OPI file. The WebOPI leverages the powerful graphical editing capabilities of BOY and provides the convenience of re-using existing OPI files. On the other hand, it uses generic JavaScript and a generic communication mechanism between the web browser and web server. It is not optimized for a control system, which results in unnecessary network traffic and resource usage. Our second technology is the WebSocket-based Process Data Access (WebPDA) [4]. It is a protocol that provides efficient control system data communication using WebSocket [5], so that users can create web-based control system UIs using standard web page technologies such as HTML, CSS and JavaScript. WebPDA is control system independent, potentially supporting any type of control system.

Chen, Xihui [ORNL] [ORNL; Kasemir, Kay [ORNL] [ORNL

2013-01-01T23:59:59.000Z

477

From Basic Control to Optimized Systems-Applying Digital Control Systems to Steam Boilers  

E-Print Network (OSTI)

This presentation examines the application of Distributed Digital Controls in order to review the application of this recent control technology towards Steam Boilers in a step-by-step manner. The main purpose of a steam generating boiler...

Hockenbury, W. D.

1982-01-01T23:59:59.000Z

478

Resilient Control System Execution Agent (ReCoSEA)  

SciTech Connect

In an increasingly networked world, critical infrastructure systems suffer from two types of vulnerability. The first is the traditionally recognized problem of monitoring the systems for faults and failures, recognizing and analyzing data, and responding with real understanding to the problems of the system. Increasingly complex systems create the opportunity for single points of failure to cascade when inaccurate assessment of system health increases response time or leads to faulty analysis of the problems involved. A second problem involves vulnerability to cyber intrusion, in which bad actors can mask system deterioration or present false data about system status. A resilient system will protect stability, efficiency, and security. To ensure these three states, the system must react to changing conditions within the system with coordination: no one component of the system can be allowed to react to problems without real consideration of the effects of that action on other components within the system. Systems with multi-agent design typically have three layers of action, a management layer, a coordination layer, and an execution layer. A resilient multi-agent system will emphasize functions of the execution layer, which has the responsibility of initiating actions, monitoring, analyzing, and controlling its own processes, while feeding information back to the higher levels of management and coordination. The design concept of a resilient control system execution agent (ReCoSEA) grows out of these underpinnings, and through the use of computational intelligence techniques, this paper suggests an associated design methodology.

Craig G. Rieger; Kris Villez

2012-08-01T23:59:59.000Z

479

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

Science Journals Connector (OSTI)

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

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

2012-01-01T23:59:59.000Z

480

Thermal and lighting performance of toplighting systems in the hot and humid climate of Thailand  

E-Print Network (OSTI)

performance of three toplighting systems were compared. For the thermal performance, total cooling loads, heat gains and losses, and interior temperature were evaluated. The lighting performance parameters examined were daylight factor, illuminance level...

Harntaweewongsa, Siritip

2006-10-30T23:59:59.000Z

Note: This page contains sample records for the topic "daylighting control 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

Rural ITS Safety Solution Systems University of Minnesota Center for Transportation Studies!  

E-Print Network (OSTI)

Rural ITS Safety Solution Systems (RITSS)! University of Minnesota ­ Center for Transportation! · Most Crashes Occur in Good Driving Conditions! ­ 54% of fatal and 2/3 of nonfatal occur during daylight

Minnesota, University of

482

CO 2 - Based Demand-Controlled Ventilation Control Strategies for Multi-Zone HVAC Systems  

E-Print Network (OSTI)

CO 2-based demand-controlled ventilation DCV strategy offers a great opportunity to reduce energy consumption in HVAC systems while providing the required ventilation. However, implementing CO 2-based DCV under ASHRAE 62.1.2004 through 2010...

Nassif, N.

2011-01-01T23:59:59.000Z

483

Monitoring Buildings with Energy Management and Control Systems  

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

6 6 Monitoring Buildings with Energy Management and Control Systems Monitoring and evaluation are important parts of all energy-efficiency programs. With the increasing regulatory requirements for verification of demand-side management program savings and continued development of more innovative financing mechanisms, the ability to substantiate claims of energy savings using measured data takes on added importance. Although expensive, the accurate monitoring of energy consumption and building operations is a necessary part of conservation savings analysis. Energy management and control systems (EMCSs), intended for building operations and control functions, already contain most of the same equipment usually installed for energy monitoring and can often be used for

484

An Approach to Supervisory Control of an Energy Management Control System Using Fuzzy Logic  

E-Print Network (OSTI)

In this paper an approach to supervisory control of multi-stage industrial control systems is presented. This approach is based on the notion of an internal reference model, and further makes use of a fuzzy multi-objective optimization strategy...

Langari, R.

485

Nonlinear control for systems with bounded inputs: Real-time embedded control applied to UAVs  

E-Print Network (OSTI)

Nonlinear control for systems with bounded inputs: Real-time embedded control applied to UAVs Farid) UAVs including conventional helicopters, four- rotors aircraft (Draganflyer) and several designs for small aerial vehicles, some restrictions and conditions specific to small UAVs have to be considered

Sontag, Eduardo

486

Control of Airborne Wind Energy Systems Based on Nonlinear Model Predictive Control & Moving Horizon Estimation  

E-Print Network (OSTI)

tethered to the ground at a high velocity across the wind direction. Power can be generated by a, the first option is considered. Because it involves a much lighter structure, a major advantage of powerControl of Airborne Wind Energy Systems Based on Nonlinear Model Predictive Control & Moving

487

Decoupled Control of Doubly Fed Induction Generator by Vector Control for Wind Energy Conversion System  

Science Journals Connector (OSTI)

Abstract Since the penetration of wind power generation in growing, system operators have an increasing interest in analyzing the impact of wind power on the connected power system. The doubly fed induction generator (DFIG) is generally used in the production of the electric energy and more specifically in wind turbines. Currently, to regulate the active and reactive power exchanged between the machine and the grid. A detail dynamic model of a DFIG-based wind-turbine grid-connected system is presented in the d,q -synchronous reference frame by controlling the machine inverter with the algorithm of control based on vector control concept (with stator flux orientation). The aim of control is to have measured active and reactive powers equal to the reference values. These powers must then be collected. In order to measure only the rotor currents, we can use an indirect control method, with integrating power regulation loop, using a classical PI controller: proportionalintegral. In this way, this control is able to limit the machine rotor currents. In another way, an appropriate fitness function is derived to express the time domain evolution of DFIG, with the objective to assure the DFIG continuous operation even under a fault condition and improve at the same time its transient behavior as compared with the indirect control without power loop. The control of our machine is simulated; finally the Simulations results are presented and discussed.

K. Kerrouche; A. Mezouar; Kh. Belgacem

2013-01-01T23:59:59.000Z

488

Adaptive hybrid optimal quantum control for imprecisely characterized systems  

E-Print Network (OSTI)

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

D. J. Egger; F. K. Wilhelm

2014-02-28T23:59:59.000Z

489

Autonomous, teleoperated, and shared control of robot systems  

SciTech Connect

This paper illustrates how different modes of operation such as bilateral teleoperation, autonomous control, and shared control can be described and implemented using combinations of modules in the SMART robot control architecture. Telerobotics modes are characterized by different ``grids`` of SMART icons, where each icon represents a portion of run-time code that implements a passive control law. By placing strict requirements on the module`s input-output behavior and using scattering theory to develop a passive sampling technique, a flexible, expandable telerobot architecture is achieved. An automatic code generation tool for generating SMART systems is also described.

Anderson, R.J.

1994-12-31T23:59:59.000Z

490

Controlled environment vitrification system for preparation of liquids  

DOE Patents (OSTI)

A system is described for preparing specimens in a controlled environment to insure that a liquid or partially liquid specimen is maintained in its original state while it is being prepared, and once prepared the specimen is vitrified or solidified with minimal alteration of its microstructure. The controlled environment is provided within a chamber where humidity and temperature can be controlled precisely while the specimen is prepared. The specimen is mounted on a plunger and a shutter controlled opening is opened substantially simultaneously with release of the plunger so the specimen is propelled through the shutter into an adjacent cryogenic bath. 7 figs.

Bellare, J.R.; Davis, H.T.; Scriven, L.E. II; Talmon, Y.

1988-06-28T23:59:59.000Z

491

Smart panels with SISO or MIMO velocity feedback control systems  

Science Journals Connector (OSTI)

This paper summarizes and contrasts the research work that has been carried out on two types of smart panels with ASAC control systems: first a SISO velocity feedback control system with a sensor that detects the volumetric component of the vibration of the panel and an actuator that exerts a uniform force over the surface of the panel and second a MIMO decentralized feedback control system using a grid of sensors that measure the point velocities of the panel and a grid of actuators that generates point excitations in the locations of the sensors. Both theoretical predictions and experimental results are presented for a reference problem of control of sound radiation by a rectangular panel clamped along the perimeter. The simulations carried out for the two systems have shown that the smart panel with the volume velocity sensor and uniform force actuator can in principle give better control performance than the smart panel with the sixteen decentralized control units. However the practical implementation of the smart panel with the volume velocity sensor and uniform force actuator is limited by stability problems which are instead a minor issue for the panel with 16 decentralized velocity feedback control units.

2003-01-01T23:59:59.000Z

492

Port-Hamiltonian systems: network modeling and control of nonlinear physical systems  

E-Print Network (OSTI)

Port-Hamiltonian systems: network modeling and control of nonlinear physical systems A.J. van der Schaft February 3, 2004 Abstract It is shown how port-based modeling of lumped-parameter complex physical to a geometrically defined class of systems, called port-Hamiltonian systems. These are Hamiltonian systems defined

Schaft, Arjan van der

493

Dual annular rotating "windowed" nuclear reflector reactor control system  

DOE Patents (OSTI)

A nuclear reactor control system is provided in a nuclear reactor having a core operating in the fast neutron energy spectrum where criticality control is achieved by neutron leakage. The control system includes dual annular, rotatable reflector rings. There are two reflector rings: an inner reflector ring and an outer reflector ring. The reflectors are concentrically assembled, surround the reactor core, and each reflector ring includes a plurality of openings. The openings in each ring are capable of being aligned or non-aligned with each other. Independent driving means for each of the annular reflector rings is provided so that reactor criticality can be initiated and controlled by rotation of either reflector ring such that the extent of alignment of the openings in each ring controls the reflection of neutrons from the core.

Jacox, Michael G. (Idaho Falls, ID); Drexler, Robert L. (Idaho Falls, ID); Hunt, Robert N. M. (Idaho Falls, ID); Lake, James A. (Idaho Falls, ID)

1994-01-01T23:59:59.000Z

494

Experimental feedback control of quantum systems using weak measurements  

E-Print Network (OSTI)

A goal of the emerging field of quantum control is to develop methods for quantum technologies to function robustly in the presence of noise. Central issues are the fundamental limitations on the available information about quantum systems and the disturbance they suffer in the process of measurement. In the context of a simple quantum control scenario--the stabilization of non-orthogonal states of a qubit against dephasing--we experimentally explore the use of weak measurements in feedback control. We find that, despite the intrinsic difficultly of implementing them, weak measurements allow us to control the qubit better in practice than is even theoretically possible without them. Our work shows that these more general quantum measurements can play an important role for feedback control of quantum systems.

G. G. Gillett; R. B. Dalton; B. P. Lanyon; M. P. Almeida; M. Barbieri; G. J. Pryde; J. L. O'Brien; K. J. Resch; S. D. Bartlett; A. G. White

2010-03-01T23:59:59.000Z

495

Control Systems Security News Archive | Department of Energy  

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

News Archive News Archive Control Systems Security News Archive Control Systems Security News Archive September 2010 - Secretary Chu Announces Latest Efforts to Address Cybersecurity August 2010: - DOE 2010 Cybersecurity Peer Review Update March 2010 - DOE and Industry Showcase New Control Systems Security Technologies at DistribuTECH Feb. 2010 - DOE Issues National Energy Sector Cyber Organization Notice of Intent Nov. 2009 - New TCIPG Research Program Builds on Past Successes with Nearly $18.8 Million DOE Award October 2009 - DOE NSTB researchers demonstrated R&D successes to asset owners at EnergySec Conference September 2009 - ISA approves standard for wireless automation in process control applications Sept. 2009 - Government and Industry a Force for Collaboration at the

496

Flex power perspectives of indirect power system control through dynamic  

Open Energy Info (EERE)

Flex power perspectives of indirect power system control through dynamic Flex power perspectives of indirect power system control through dynamic power price (Smart Grid Project) Jump to: navigation, search Project Name Flex power perspectives of indirect power system control through dynamic power price Country Denmark Coordinates 56.26392°, 9.501785° 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":56.26392,"lon":9.501785,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

497

Vehicle Technologies Office: Thermal Control and System Integration  

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

Thermal Control and System Integration Thermal Control and System Integration The thermal control and system integration activity focuses on issues such as the integration of motor and power control technologies and the development of advanced thermal control technologies. Thermal control is a critical element to enable power density, cost, and reliability of Power Electronics and Electric Machines (PEEM). Current hybrid electric vehicle systems typically use a dedicated 65°C coolant loop to cool the electronics and electric machines. A primary research focus is to develop cooling technologies that will enable the use of coolant temperatures of up to 105°C. Enabling the higher-temperature coolant would reduce system cost by using a single loop to cool the PEEM, internal combustion engine or fuel cell. Several candidate cooling technologies are being investigated along with the potential to reduce material and component costs through the use of more aggressive cooling. Advanced component modeling, fabrication, and manufacturing techniques are also being investigated.

498

Indicator system for a process plant control complex  

DOE Patents (OSTI)

An advanced control room complex for a nuclear power plant, including a discrete indicator and alarm system (72) which is nuclear qualified for rapid response to changes in plant parameters and a component control system (64) which together provide a discrete monitoring and control capability at a panel (14-22, 26, 28) in the control room (10). A separate data processing system (70), which need not be nuclear qualified, provides integrated and overview information to the control room and to each panel, through CRTs (84) and a large, overhead integrated process status overview board (24). The discrete indicator and alarm system (72) and the data processing system (70) receive inputs from common plant sensors and validate the sensor outputs to arrive at a representative value of the parameter for use by the operator during both normal and accident conditions, thereby avoiding the need for him to assimilate data from each sensor individually. The integrated process status board (24) is at the apex of an information hierarchy that extends through four levels and provides access at each panel to the full display hierarchy. The control room panels are preferably of a modular construction, permitting the definition of inputs and outputs, the man machine interface, and the plant specific algorithms, to proceed in parallel with the fabrication of the panels, the installation of the equipment and the generic testing thereof.

Scarola, Kenneth (Windsor, CT); Jamison, David S. (Windsor, CT); Manazir, Richard M. (North Canton, CT); Rescorl, Robert L. (Vernon, CT); Harmon, Daryl L. (Enfield, CT)

1993-01-01T23:59:59.000Z

499

Indicator system for advanced nuclear plant control complex  

DOE Patents (OSTI)

An advanced control room complex for a nuclear power plant, including a discrete indicator and alarm system (72) which is nuclear qualified for rapid response to changes in plant parameters and a component control system (64) which together provide a discrete monitoring and control capability at a panel (14-22, 26, 28) in the control room (10). A separate data processing system (70), which need not be nuclear qualified, provides integrated and overview information to the control room and to each panel, through CRTs (84) and a large, overhead integrated process status overview board (24). The discrete indicator and alarm system (72) and the data processing system (70) receive inputs from common plant sensors and validate the sensor outputs to arrive at a representative value of the parameter for use by the operator during both normal and accident conditions, thereby avoiding the need for him to assimilate data from each sensor individually. The integrated process status board (24) is at the apex of an information hierarchy that extends through four levels and provides access at each panel to the full display hierarchy. The control room panels are preferably of a modular construction, permitting the definition of inputs and outputs, the man machine interface, and the plant specific algorithms, to proceed in parallel with the fabrication of the panels, the installation of the equipment and the generic testing thereof.

Scarola, Kenneth (Windsor, CT); Jamison, David S. (Windsor, CT); Manazir, Richard M. (North Canton, CT); Rescorl, Robert L. (Vernon, CT); Harmon, Daryl L. (Enfield, CT)

1993-01-01T23:59:59.000Z