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1

Power Tower | Department of Energy  

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

50 MW of power from CSP power towers are installed in the United States, Spain, and Germany. The SunShot Initiative funds (R&D) on power tower systems and related aspects within...

2

Sandia National Laboratories: Power Towers for Utilities  

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

Engine Test Facility Central Receiver Test Facility Power Towers for Utilities Solar Furnace Dish Test Facility Optics Lab Parabolic Dishes Work For Others (WFO) User...

3

Multi-objective optimization of solar tower power plants  

E-Print Network (OSTI)

Multi-objective optimization of solar tower power plants Pascal Richter Center for Computational · Optimization of solar tower power plants 1/20 #12;Introduction ­ Solar tower power plants Solar tower PS10 (11 MW) in Andalusia, Spain · Solar tower with receiver · Heliostat field with self-aligning mirrors

Ábrahám, Erika

4

Project Profile: Brayton Cycle Baseload Power Tower  

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

Wilson Solarpower, under the Baseload CSP FOA, is validating a proposed utility-scale, Brayton cycle baseload power tower system with a capacity factor of at least 75% and LCOE of $0.09/kWh.

5

Optical Durability of Candidate Solar Reflectors for Concentrating Solar Power  

SciTech Connect

Concentrating solar power (CSP) technologies use large mirrors to collect sunlight to convert thermal energy to electricity. The viability of CSP systems requires the development of advanced reflector materials that are low in cost and maintain high specular reflectance for extended lifetimes under severe outdoor environments. The long-standing goals for a solar reflector are specular reflectance above 90% into a 4 mrad half-cone angle for at least 10 years outdoors with a cost of less than $13.8/m{sup 2} (the 1992 $10.8/m{sup 2} goal corrected for inflation to 2002 dollars) when manufactured in large volumes. Durability testing of a variety of candidate solar reflector materials at outdoor test sites and in laboratory accelerated weathering chambers is the main activity within the Advanced Materials task of the CSP Program at the National Renewable Energy Laboratory (NREL) in Golden, Colorado. Test results to date for several candidate solar reflector materials will be presented. These include the optical durability of thin glass, thick glass, aluminized reflectors, front-surface mirrors, and silvered polymer mirrors. The development, performance, and durability of these materials will be discussed. Based on accelerated exposure testing the glass, silvered polymer, and front-surface mirrors may meet the 10 year lifetime goals, but at this time because of significant process changes none of the commercially available solar reflectors and advanced solar reflectors have demonstrated the 10 year or more aggressive 20 year lifetime goal.

Kennedy, C. E.; Terwilliger, K.

2007-01-01T23:59:59.000Z

6

SunShot Initiative: Brayton Cycle Baseload Power Tower  

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

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

7

Towards Holistic Power Tower System Optimization  

Science Journals Connector (OSTI)

Abstract Many stakeholders today consider power tower systems to be the most promising CSP technology for the future. Therefore much effort is spent to improve individual components and subsystems. While these are valuable steps towards cost reduction, it is also of great importance to perform an overall, i.e. holistic, system layout and optimization process. Still, even today heliostats are often characterized and even compared using the single parameter cost per square meter, which is not sufficient. More factors like optical and tracking accuracy, shape, structural deformation under operation loads and maybe even power consumption have to be factored in to allow for a meaningful comparison. In the paper recent activities targeting at a more holistic power tower system optimization are described. For the overall layout process of heliostat field, tower and receiver the complete system is modeled using SAM or an in-house tool based on SolTrace and Matlab to determine investment cost, annual electricity generation and resulting levelised electricity costs. By doing so, different heliostat types and field layouts can be directly compared using \\{LCoE\\} as a reasonable figure of merit. This logical approach to identify the optimum heliostat design is described and illustrated using two generic heliostat designs and the respective field layouts as an example; a recently developed updated tower cost curve is used. It is found that using specific heliostat costs (i.e. $/m2) alone as a figure of merit to assess different heliostat designs can be misleading, because heliostats characterized by lower specific investment costs, but also lower optical and tracking accuracy, can lead to higher levelised electricity costs, which means the real objective of power plant optimization is not reached by looking at heliostat costs per square meter alone.

G. Weinrebe; F. von Reeken; M. Whrbach; T. Plaz; V. Gcke; M. Balz

2014-01-01T23:59:59.000Z

8

District Cooling Using Central Tower Power Plant  

Science Journals Connector (OSTI)

Abstract During the operation of solar power towers there are occasions, commonly in the summer season, where some of the heliostats have to stop focusing at the central receiver, located at the top of the tower, because the maximum temperature that the receiver can withstand has been reached. The highest demands of cooling for air conditioning take place at these same occasions. In the present paper, we have analyzed the possibility of focusing the exceeding heliostats to the receiver increasing the mass flow rate of the heat transfer fluid over the nominal value and using the extra heat as a source of an absorption chiller. The chilled water would be used to cool buildings and offices, using a district cooling network. Using the extra heat of the solar power tower plant would greatly reduce the electricity usage. In this work we have analyzed the case of a circular field of heliostats focusing at a circular receiver, such as the case of Gemasolar plant. We have quantified the thermal power that can be obtained from the unused heliostats, the cooling capacity of the absorption system as well as the heat losses through the insulated pipes that distribute the chilled water to the buildings of the network.

C. Marugn-Cruz; S. Snchez-Delgado; M.R. Rodrguez-Snchez; M. Venegas

2014-01-01T23:59:59.000Z

9

Concentrating Solar Power Tower System Basics | Department of Energy  

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

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

10

Concentrating Solar Power Tower System Basics | Department of...  

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

which, in turn, is used in a conventional turbine generator to produce electricity. Some power towers use watersteam as the heat-transfer fluid. Other advanced designs are...

11

Conversion Tower for Dispatchable Solar Power: High-Efficiency Solar-Electric Conversion Power Tower  

SciTech Connect

HEATS Project: Abengoa Solar is developing a high-efficiency solar-electric conversion tower to enable low-cost, fully dispatchable solar energy generation. Abengoas conversion tower utilizes new system architecture and a two-phase thermal energy storage media with an efficient supercritical carbon dioxide (CO2) power cycle. The company is using a high-temperature heat-transfer fluid with a phase change in between its hot and cold operating temperature. The fluid serves as a heat storage material and is cheaper and more efficient than conventional heat-storage materials, like molten salt. It also allows the use of a high heat flux solar receiver, advanced high thermal energy density storage, and more efficient power cycles.

None

2012-01-11T23:59:59.000Z

12

Don Ana Sun Tower Solar Power Plant | Open Energy Information  

Open Energy Info (EERE)

Don Ana Sun Tower Solar Power Plant Don Ana Sun Tower Solar Power Plant Jump to: navigation, search Name Don Ana Sun Tower Solar Power Plant Facility Don Ana Sun Tower Sector Solar Facility Type Concentrating Solar Power Developer NRG Energy/eSolar Location Dona Ana County, New Mexico Coordinates 32.485767°, -106.7234639° 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":32.485767,"lon":-106.7234639,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

13

Alpine SunTower Solar Power Plant | Open Energy Information  

Open Energy Info (EERE)

SunTower Solar Power Plant SunTower Solar Power Plant Jump to: navigation, search Name Alpine SunTower Solar Power Plant Facility Alpine SunTower Sector Solar Facility Type Concentrating Solar Power Developer NRG Energy/eSolar Location Lancaster, California Coordinates 34.6867846°, -118.1541632° 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":34.6867846,"lon":-118.1541632,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

14

Control of Noise in Power Station Cooling Tower Systems  

Science Journals Connector (OSTI)

Power?station cooling tower systems must handle large volumes of water and air with large potential energy in the water flows and the requirement for large fans. To minimize the noise generated at power station sites use is made of efficient tower fill materials dual low?speed fans (which shifts the spectrum and lowers mid?frequency noise level) and barrier effects in tower location and orientation. Conventional noise control measures such as mufflers are avoided because of the required increase in pressure across the fan and the high initial cost for quieting large towers. The use of natural draft towers is discussed and it is shown that although the low?frequency noise may be reduced the noise levels at typical property line locations are of the same order of magnitude as that for conventional mechanical cooling towers. Since cooling towers at power stations are required as an environmental (thermal) pollution control measure a trade?off between temperature rise of local water supplies versus increases in community noise becomes a critical factor.

Lewis S. Goodfriend

1973-01-01T23:59:59.000Z

15

Utility-scale Power Tower Solar Systems: Performance Acceptance Test Guidelines  

Science Journals Connector (OSTI)

Abstract Prior to commercial operation, large solar systems in utility-size power plants need to pass performance acceptance tests conducted by the engineering, procurement, and construction (EPC) contractor or owners. In lieu of the present absence of ASME or other international test codes developed for this purpose, the NREL undertook the development of interim Guidelines to provide recommendations for test procedures that can yield results of a high level of accuracy consistent with good engineering knowledge and practice. The Guidelines contained here follow the general approach of the earlier NREL report on parabolic trough collector fields, but in this case are specifically written for power tower solar systems composed of a heliostat (reflector) field directing the sun's rays to a receiver (heat exchanger) on a high central tower. The working fluid in the tower receiver can be molten salt, water/steam, air, CO2, or other suitable fluids, each with its own particular attributes. The fundamental differences between acceptance of a solar power plant and a conventional fossil-fired plant are the inherently transient nature of the energy source and the necessity to use a performance projection model in the acceptance process. Two primary types of test runs are to be conducted. The first the Short-Duration Steady-State Thermal Power Test (Power Test) measures the thermal power output of the solar system under clear-sky conditions over a short period, during which thermal equilibrium and stable steady-state conditions exist, and compares the measured results to performance model projections for those conditions. The second test type the Long-Duration Production (or Reliability) Test (Production Test) is a continuous multi-day energy test that gathers multiple detailed daily thermal energy outputs and compares the results to projections from a performance model. Both clear-sky and partly cloudy conditions are acceptable. Additionally, the functionality of the solar system should be observed with regard to such items as daily startup, normal operation, standby and shutdown.

D. Kearney

2014-01-01T23:59:59.000Z

16

SunShot Initiative: Solar Power Tower Improvements with the Potential to  

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

Solar Power Tower Improvements Solar Power Tower Improvements with the Potential to Reduce Costs to someone by E-mail Share SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Facebook Tweet about SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Twitter Bookmark SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Google Bookmark SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Delicious Rank SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on Digg Find More places to share SunShot Initiative: Solar Power Tower Improvements with the Potential to Reduce Costs on AddThis.com... Concentrating Solar Power

17

PS10 Solar Power Tower Xi Jing, Fang  

E-Print Network (OSTI)

the solar energy to the grid in 2007 Operating cash flow 1.4 millions in 2007.Operating cash flow 1PS10 Solar Power Tower Xi Jing, Fang #12;Overview Magnitudes , Cost & TechnologiesMagnitudes , Cost Technological ,Social Problems and PolicyTechnological ,Social Problems and Policy ChallengesChallenges #12

Prevedouros, Panos D.

18

Strategies in tower solar power plant optimization  

E-Print Network (OSTI)

A method for optimizing a central receiver solar thermal electric power plant is studied. We parametrize the plant design as a function of eleven design variables and reduce the problem of finding optimal designs to the numerical problem of finding the minimum of a function of several variables. This minimization problem is attacked with different algorithms both local and global in nature. We find that all algorithms find the same minimum of the objective function. The performance of each of the algorithms and the resulting designs are studied for two typical cases. We describe a method to evaluate the impact of design variables in the plant performance. This method will tell us what variables are key to the optimal plant design and which ones are less important. This information can be used to further improve the plant design and to accelerate the optimization procedure.

Ramos, A

2012-01-01T23:59:59.000Z

19

Sloped-collector solar updraft tower power plant performance  

Science Journals Connector (OSTI)

Abstract A mathematical model describing fluid flow, heat transfer and pressure distribution inside a sloped-collector solar updraft tower power plant (SCSUTPP) is presented by assuming a steady compressible flow. Compared to conventional horizontal-collector solar updraft tower power plants (HCSUTPPs), the performance of SCSUTPP is comprehensively studied based on the mathematical model. The power outputs for SCSUTPP and HCSUTPP using the essential expression of driving force are respectively compared with those using the driving force expressions containing no integral, as proposed in literature. Results show that the expression containing no integral is accurate for HCSUCPP based on a compressible fluid model. The expression containing no integral is not accurate for predicting the driving force of SCSUTPP based on an incompressible fluid model when no variation of the atmospheric density with heights and no variation of difference of the atmospheric density and the density of the current inside the short SUT with heights are assumed. The gravitational effect has to be considered for predicting the SCSUTPP performance. The results show that the pressure potential and the power production of an SCSUCPP with a collector of 848m height and a vertical SUT 123m high lies between those for two \\{HCSUCPPs\\} respectively with vertical \\{SUTs\\} 547m and 971m high. This work lays a good foundation for accurate predication of potential power produced from SCSUTPP.

Xinping Zhou; Shuo Yuan; Marco Aurlio dos Santos Bernardes

2013-01-01T23:59:59.000Z

20

Power Towers of String Instantons for N=1 Vacua  

E-Print Network (OSTI)

We provide arguments for the existence of novel hereinafter called poly-instanton corrections to holomorphic couplings in four-dimensional N=1 supersymmetric string compactifications. After refining quantitatively the D-brane instanton calculus for corrections to the gauge kinetic function, we explicitly apply it to the Type I toroidal orbifold defined in arXiv:0710.3080 and compare the results to the proposed heterotic S-dual model. This leads us to the intriguing conclusion that N=1 string vacua feature a power tower like proliferation of instanton corrections.

Ralph Blumenhagen; Maximilian Schmidt-Sommerfeld

2008-03-11T23:59:59.000Z

Note: This page contains sample records for the topic "reflector power tower" 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

Probabilistic Analysis of Power Tower Systems to Achieve Sunshot Goals  

Science Journals Connector (OSTI)

Abstract The U.S. Department of Energy's (DOE) SunShot goal seeks to reduce the levelized cost of energy (LCOE) for solar energy technologies to $0.06/kWh. A number of cost and technical performance targets for various concentrating solar power (CSP) components have been issued by the DOE to meet the SunShot goals for CSP. This paper presents probabilistic analyses of the LCOE for a 100 \\{MWe\\} power tower system with inherent cost and performance uncertainties. Previous results show that while CSP systems are likely to meet the cost target necessary to compete broadly in U.S. markets, there is a very low probability of reaching an LCOE of $0.06/kWh if parameter uncertainty distributions are used that range from current cost and performance values to the current DOE targets. This work investigates additional parameter distributions using new cost and technical targets to determine performance and cost scenarios for power tower systems that yield finite probabilities of achieving $0.06/kWh. Starting with the baseline uncertainty distributions, the minimum (or maximum) value for each uncertain parameter was improved by ?50% and ?75%. Results show that the probability of achieving an LCOE of $0.06/kWh increases to 15% and 46%, respectively, with these new cost and technical targets.

C. Ho; M. Mehos; C. Turchi; M. Wagner

2014-01-01T23:59:59.000Z

22

Project Profile: Solar Power Tower Improvements with the Potential...  

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

with its baseline solar tower configuration, which is well represented by the System Advisor Model template for a 100-MW solar tower. This mature system-level design is the...

23

Solar two: A molten salt power tower demonstration  

SciTech Connect

A consortium of United States utility concerns led by the Southern California Edison Company (SCE) is conducting a cooperative project with the US Department of Energy (DOE), Sandia National Laboratories, and industry to convert the 10-MW Solar One Power Tower Pilot Plant to molten nitrate salt technology. The conversion involves installation of a new receiver, a new thermal storage system, and a new steam generator; it utilizes Solar One`s heliostat field and turbine generator. Successful operation of the converted plant, called Solar Two, will reduce economic risks in building initial commercial power tow projects and accelerate the commercial acceptance of this promising renewable energy technology. The estimated cost of Solar Two, including its three-year test period, is $48.5 million. The plant will begin operation in early 1996.

Tyner, C.E. [Sandia National Labs., Albuquerque, NM (United States); Sutherland, J.P. [Southern California Edison, Rosemead, CA (United States); Gould, W.R. Jr. [Bechtel Corp., San Francisco, CA (United States)

1995-08-01T23:59:59.000Z

24

Performance of molten salt solar power towers in Chile  

Science Journals Connector (OSTI)

Chile is facing important challenges to develop its energy sector. Estimations demonstrate that in its electricity consumption Chile will grow at an annual rate of 4.6% until 2030 despite ongoing efficiency improvements. To satisfy this demand in a sustainable way the national energy policy promotes the integration of novel and clean power generation into the national power mix with special emphasis on concentrated solar power (CSP). The present paper assesses the development of solar-based electricity generation in Chile by CSP achieved by a Solar Power Tower plant (SPT) using molten salt as heat carrier and store. Such SPTs can be installed at different locations in Chile and connected to the main national grid. Results show that each SPT plant can generate around 76 GWh el of net electricity when considering solar irradiation as the sole energy source and at a 16% overall efficiency of the SPT process. For operation in a continuous mode a hybrid configuration with integrated gas backup system increases the generating potential of each SPT to 135 GWh el . A preliminary Levelized Energy Cost (LEC) calculation provides LEC values between 0.15 and 0.18 $/kWh as function of the overall process efficiency and estimated investment cost. Chile's solar irradiation favors the implementation of SPT plants.

G. Cceres; N. Anrique; A. Girard; J. Degrve; J. Baeyens; H. L. Zhang

2013-01-01T23:59:59.000Z

25

Microsoft Word - PowerTower_work_2009.doc  

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

tower systems Accomplishments * Helped Rocketdyne begin development of their own heliostat * Performed first-ever test of a heliostat at a distance of 1 mile * Updated SOLERGY...

26

The Use of Tall Tower Field Data for Estimating Wind Turbine Power Performance , J. Chapman1  

E-Print Network (OSTI)

The Use of Tall Tower Field Data for Estimating Wind Turbine Power Performance A. Swift1 , J wind speed measurements on the TTU WISE 200m and 78m towers. A hypothetical wind turbine is shown. At potential wind turbine sites, it is uncommon to have wind measurements available at multiple heights. Then

Manuel, Lance

27

Meteorological Impacts of the Cooling Tower of the Goesgen Nuclear Power Plant  

Science Journals Connector (OSTI)

The main meteorological effect due to the Gsgen cooling tower is, in fact, the reduction ... near vicinity (12 km) of the power station. A network of five cinecameras provides ... on 23 points in the vicinity o...

Daniel A. Schneiter

1987-01-01T23:59:59.000Z

28

Brayton-Cycle Baseload Power Tower CSP System  

SciTech Connect

The primary objectives of Phase 2 of this Project were: 1. Engineer, fabricate, and conduct preliminary testing on a low-pressure, air-heating solar receiver capable of powering a microturbine system to produce 300kWe while the sun is shining while simultaneously storing enough energy thermally to power the system for up to 13 hours thereafter. 2. Cycle-test a high-temperature super alloy, Haynes HR214, to determine its efficacy for the systems high-temperature heat exchanger. 3. Engineer the thermal energy storage system This Phase 2 followed Wilsons Phase 1, which primarily was an engineering feasibility study to determine a practical and innovative approach to a full Brayton-cycle system configuration that could meet DOEs targets. Below is a summary table of the DOE targets with Wilsons Phase 1 Project results. The results showed that a Brayton system with an innovative (low pressure) solar receiver with ~13 hours of dry (i.e., not phase change materials or molten salts but rather firebrick, stone, or ceramics) has the potential to meet or exceed DOE targets. Such systems would consist of pre-engineered, standardized, factory-produced modules to minimize on-site costs while driving down costs through mass production. System sizes most carefully analyzed were in the range of 300 kWe to 2 MWe. Such systems would also use off-the-shelf towers, blowers, piping, microturbine packages, and heliostats. Per DOEs instructions, LCOEs are based on the elevation and DNI levels of Daggett, CA, for a 100 MWe power plant following 2 GWe of factory production of the various system components. Success criteria DOE targets Wilson system LCOE DOEs gas price $6.75/MBtu 9 cents/kWh 7.7 cents/kWh LCOE Current gas price $4.71/MBtu NA 6.9 cents/kWh Capacity factor 75% (6500hr) 75-100% Solar fraction 85% (5585hr) >5585hr Receiver cost $170/kWe $50/kWe Thermal storage cost $20/kWhth $13/kWhth Heliostat cost $120/m2 $89.8/m2

Anderson, Bruce

2013-12-31T23:59:59.000Z

29

The Solar Power Tower Jlich A Solar Thermal Power Plant for Test and Demonstration of Air Receiver Technology  

Science Journals Connector (OSTI)

The open volumetric receiver technology allows the use of air as heat transfer medium at high temperatures in solar thermal power tower plants. It combines porous ceramic ... a strictly modular receiver design. H...

K. Hennecke; P. Schwarzbzl; G. Koll

2009-01-01T23:59:59.000Z

30

Gaskell Sun Tower and 2 others Solar Power Plant | Open Energy Information  

Open Energy Info (EERE)

Gaskell Sun Tower and 2 others Solar Power Plant Gaskell Sun Tower and 2 others Solar Power Plant Jump to: navigation, search Name Gaskell Sun Tower and 2 others Solar Power Plant Facility Gaskell Sun Tower and 2 others Sector Solar Facility Type Concentrating Solar Power Facility Status Proposed Developer NRG Energy/eSolar Location Kern County, California Coordinates 35.4937274°, -118.8596804° 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":35.4937274,"lon":-118.8596804,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

31

Current and future costs for parabolic trough and power tower systems in the US market.  

SciTech Connect

NREL's Solar Advisor Model (SAM) is employed to estimate the current and future costs for parabolic trough and molten salt power towers in the US market. Future troughs are assumed to achieve higher field temperatures via the successful deployment of low melting-point, molten-salt heat transfer fluids by 2015-2020. Similarly, it is assumed that molten salt power towers are successfully deployed at 100MW scale over the same time period, increasing to 200MW by 2025. The levelized cost of electricity for both technologies is predicted to drop below 11 cents/kWh (assuming a 10% investment tax credit and other financial inputs outlined in the paper), making the technologies competitive in the marketplace as benchmarked by the California MPR. Both technologies can be deployed with large amounts of thermal energy storage, yielding capacity factors as high as 65% while maintaining an optimum LCOE.

Turchi, Craig (National Renewable Energy Laboratory, Golden, CO); Kolb, Gregory J.; Mehos, Mark Steven (National Renewable Energy Laboratory, Golden, CO); Ho, Clifford Kuofei

2010-08-01T23:59:59.000Z

32

An evaluation of possible next-generation high temperature molten-salt power towers.  

SciTech Connect

Since completion of the Solar Two molten-salt power tower demonstration in 1999, the solar industry has been developing initial commercial-scale projects that are 3 to 14 times larger. Like Solar Two, these initial plants will power subcritical steam-Rankine cycles using molten salt with a temperature of 565 C. The main question explored in this study is whether there is significant economic benefit to develop future molten-salt plants that operate at a higher receiver outlet temperature. Higher temperatures would allow the use of supercritical steam cycles that achieve an improved efficiency relative to today's subcritical cycle ({approx}50% versus {approx}42%). The levelized cost of electricity (LCOE) of a 565 C subcritical baseline plant was compared with possible future-generation plants that operate at 600 or 650 C. The analysis suggests that {approx}8% reduction in LCOE can be expected by raising salt temperature to 650 C. However, most of that benefit can be achieved by raising the temperature to only 600 C. Several other important insights regarding possible next-generation power towers were also drawn: (1) the evaluation of receiver-tube materials that are capable of higher fluxes and temperatures, (2) suggested plant reliability improvements based on a detailed evaluation of the Solar Two experience, and (3) a thorough evaluation of analysis uncertainties.

Kolb, Gregory J.

2011-12-01T23:59:59.000Z

33

Comparison of an impedance heating system to mineral insulated heat trace for power tower applications  

SciTech Connect

A non-conventional type of heating system is being tested at Sandia National Laboratories for solar thermal power tower applications. In this system, called impedance heating, electric current flows directly through the pipe to maintain the desired temperature. The pipe becomes the resistor where the heat is generated. Impedance heating has many advantages over previously used mineral insulated (MI) heat trace. An impedance heating system should be much more reliable than heat trace cable since delicate junctions and cabling are not used and the main component, a transformer, is inherently reliable. A big advantage of impedance heating is the system can be sized to rapidly heat up the piping to provide rapid response times necessary in cyclic power plants such as solar power towers. In this paper, experimental results from testing an impedance heating system are compared to MI heat trace. The authors found impedance heating was able to heat piping rapidly and effectively. There were not significant stray currents and impedance heating did not affect instrumentation.

Pacheco, J.E.; Kolb, W.J.

1997-03-01T23:59:59.000Z

34

Propagation of the low-frequency noise generated by power station water-cooling towers  

Science Journals Connector (OSTI)

The propagation of low-frequency noise generated by air turbulent motion in water-cooling towers is investigated by the use of geometrical acoustics of moving media. It is shown that a cooling tower plum acts ...

Sergei P. Fisenko

1997-01-01T23:59:59.000Z

35

Utility-Scale Power Tower Solar Systems: Performance Acceptance Test Guidelines  

SciTech Connect

The purpose of these Guidelines is to provide direction for conducting performance acceptance testing for large power tower solar systems that can yield results of a high level of accuracy consistent with good engineering knowledge and practice. The recommendations have been developed under a National Renewable Energy Laboratory (NREL) subcontract and reviewed by stakeholders representing concerned organizations and interests throughout the concentrating solar power (CSP) community. An earlier NREL report provided similar guidelines for parabolic trough systems. These Guidelines recommend certain methods, instrumentation, equipment operating requirements, and calculation methods. When tests are run in accordance with these Guidelines, we expect that the test results will yield a valid indication of the actual performance of the tested equipment. But these are only recommendations--to be carefully considered by the contractual parties involved in the Acceptance Tests--and we expect that modifications may be required to fit the particular characteristics of a specific project.

Kearney, D.

2013-03-01T23:59:59.000Z

36

Optimizing Cooling Tower Performance- Refrigeration Systems, Chemical Plants, and Power Plants all Have A Resource Quietly Awaiting Exploitation-Cold Water!!  

E-Print Network (OSTI)

OPTIMIZING COOLING TOWER PERFORMANCE REFRIGERATION SYSTEMS, CHEMICAL PLANTS, AND POWER PLANTS ALL HAVE A RESOURCE QUIETLY AWAITING EXPLOITATION - COLD WATER!! ROBERT BURGER President Burger and Associates, Inc. Dallas, Texas Cooling... towers, because of their seeming simplicity, are usually orphans of the facilities operation. We are all aware that cooling towers are the step-children of the chemical process plant, electric power generating station, and refrigeration system...

Burger, R.

37

Multi-tower line focus Fresnel array project  

SciTech Connect

As an alternative to conventional tracking solar thermal trough systems, one may use line focus Fresnel reflector systems. In a conventional Fresnel reflector design, each field of reflectors is directed to a single tower. However efficient systems of very high ground utilisation can be setup if a field of reflectors uses multiple receivers on different towers. This paper describes a line focus system, called the compact linear fresnel reflector system and a project to produce an initial 95 MWth solar array. The array will be used as a retrofit preheater for a coal fired generating plant.

Mills, D.R.; Morrison, G.; Pye, J.; Le Lievre, P. [Solar Heat & Power SHP Pty. Ltd., Sydney, NSW (Australia)

2006-02-15T23:59:59.000Z

38

Structural Design Considerations for Tubular Power Tower Receivers Operating at 650 Degrees C: Preprint  

SciTech Connect

Research of advanced power cycles has shown supercritical carbon dioxide power cycles may have thermal efficiency benefits relative to steam cycles at temperatures around 500 - 700 degrees C. To realize these benefits for CSP, it is necessary to increase the maximum outlet temperature of current tower designs. Research at NREL is investigating a concept that uses high-pressure supercritical carbon dioxide as the heat transfer fluid to achieve a 650 degrees C receiver outlet temperature. At these operating conditions, creep becomes an important factor in the design of a tubular receiver and contemporary design assumptions for both solar and traditional boiler applications must be revisited and revised. This paper discusses lessons learned for high-pressure, high-temperature tubular receiver design. An analysis of a simplified receiver tube is discussed, and the results show the limiting stress mechanisms in the tube and the impact on the maximum allowable flux as design parameters vary. Results of this preliminary analysis indicate an underlying trade-off between tube thickness and the maximum allowable flux on the tube. Future work will expand the scope of design variables considered and attempt to optimize the design based on cost and performance metrics.

Neises, T. W.; Wagner, M. J.; Gray, A. K.

2014-04-01T23:59:59.000Z

39

Life Cycle Greenhouse Gas Emissions of Trough and Tower Concentrating Solar Power Electricity Generation: Systematic Review and Harmonization  

SciTech Connect

In reviewing life cycle assessment (LCA) literature of utility-scale concentrating solar power (CSP) systems, this analysis focuses on reducing variability and clarifying the central tendency of published estimates of life cycle greenhouse gas (GHG) emissions through a meta-analytical process called harmonization. From 125 references reviewed, 10 produced 36 independent GHG emissions estimates passing screens for quality and relevance: 19 for parabolic trough (trough) technology and 17 for power tower (tower) technology. The interquartile range (IQR) of published estimates for troughs and towers were 83 and 20 grams of carbon dioxide equivalent per kilowatt-hour (g CO2-eq/kWh),1 respectively; median estimates were 26 and 38 g CO2-eq/kWh for trough and tower, respectively. Two levels of harmonization were applied. Light harmonization reduced variability in published estimates by using consistent values for key parameters pertaining to plant design and performance. The IQR and median were reduced by 87% and 17%, respectively, for troughs. For towers, the IQR and median decreased by 33% and 38%, respectively. Next, five trough LCAs reporting detailed life cycle inventories were identified. The variability and central tendency of their estimates are reduced by 91% and 81%, respectively, after light harmonization. By harmonizing these five estimates to consistent values for global warming intensities of materials and expanding system boundaries to consistently include electricity and auxiliary natural gas combustion, variability is reduced by an additional 32% while central tendency increases by 8%. These harmonized values provide useful starting points for policy makers in evaluating life cycle GHG emissions from CSP projects without the requirement to conduct a full LCA for each new project.

Burkhardt, J. J.; Heath, G.; Cohen, E.

2012-04-01T23:59:59.000Z

40

A new method for the design of the heliostat field layout for solar tower power plant  

Science Journals Connector (OSTI)

A new method for the design of the heliostat field layout for solar tower power plant is proposed. In the new method, the heliostat boundary is constrained by the receiver geometrical aperture and the efficiency factor which is the product of the annual cosine efficiency and the annual atmospheric transmission efficiency of heliostat. With the new method, the annual interception efficiency does not need to be calculated when places the heliostats, therefore the total time of design and optimization is saved significantly. Based on the new method, a new code for heliostat field layout design (HFLD) has been developed and a new heliostat field layout for the PS10 plant at the PS10 location has been designed by using the new code. Compared with current PS10 layout, the new designed heliostats have the same optical efficiency but with a faster response speed. In addition, to evaluate the feasibility of crops growth on the field land under heliostats, a new calculation method for the annual sunshine duration on the land surface is proposed as well.

Xiudong Wei; Zhenwu Lu; Zhifeng Wang; Weixing Yu; Hongxing Zhang; Zhihao Yao

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "reflector power tower" 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

Incorporating supercritical steam turbines into molten-salt power tower plants : feasibility and performance.  

SciTech Connect

Sandia National Laboratories and Siemens Energy, Inc., examined 14 different subcritical and supercritical steam cycles to determine if it is feasible to configure a molten-salt supercritical steam plant that has a capacity in the range of 150 to 200 MWe. The effects of main steam pressure and temperature, final feedwater temperature, and hot salt and cold salt return temperatures were determined on gross and half-net efficiencies. The main steam pressures ranged from 120 bar-a (subcritical) to 260 bar-a (supercritical). Hot salt temperatures of 566 and 600%C2%B0C were evaluated, which resulted in main steam temperatures of 553 and 580%C2%B0C, respectively. Also, the effects of final feedwater temperature (between 260 and 320%C2%B0C) were evaluated, which impacted the cold salt return temperature. The annual energy production and levelized cost of energy (LCOE) were calculated using the System Advisory Model on 165 MWe subcritical plants (baseline and advanced) and the most promising supercritical plants. It was concluded that the supercritical steam plants produced more annual energy than the baseline subcritical steam plant for the same-size heliostat field, receiver, and thermal storage system. Two supercritical steam plants had the highest annual performance and had nearly the same LCOE. Both operated at 230 bar-a main steam pressure. One was designed for a hot salt temperature of 600%C2%B0C and the other 565%C2%B0C. The LCOEs for these plants were about 10% lower than the baseline subcritical plant operating at 120 bar-a main steam pressure and a hot salt temperature of 565%C2%B0C. Based on the results of this study, it appears economically and technically feasible to incorporate supercritical steam turbines in molten-salt power tower plants.

Pacheco, James Edward; Wolf, Thorsten [Siemens Energy, Inc., Orlando, FL; Muley, Nishant [Siemens Energy, Inc., Orlando, FL

2013-03-01T23:59:59.000Z

42

Convection towers  

DOE Patents (OSTI)

Convection towers which are capable of cleaning the pollution from large quantities of air, of generating electricity, and of producing fresh water utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity, and condensers produce fresh water.

Prueitt, Melvin L. (Los Alamos, NM)

1996-01-01T23:59:59.000Z

43

Convection towers  

DOE Patents (OSTI)

Convection towers which are capable of cleaning the pollution from large quantities of air, of generating electricity, and of producing fresh water utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity, and condensers produce fresh water.

Prueitt, Melvin L. (Los Alamos, NM)

1995-01-01T23:59:59.000Z

44

Convection towers  

DOE Patents (OSTI)

Convection towers which are capable of cleaning the pollution from large quantities of air, of generating electricity, and of producing fresh water utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity, and condensers produce fresh water. 6 figs.

Prueitt, M.L.

1996-01-16T23:59:59.000Z

45

Convection towers  

DOE Patents (OSTI)

Convection towers which are capable of cleaning the pollution from large quantities of air and of generating electricity utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity. Other embodiments may also provide fresh water, and operate in an updraft mode.

Prueitt, Melvin L. (Los Alamos, NM)

1994-01-01T23:59:59.000Z

46

Sandia National Laboratories: Solar Tower  

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

Solar Thermal Test Facility * NSTTF * Renewable Energy * SAND2012-8086W * solar * Solar Energy * solar power * Solar Research * Solar Tower Comments are closed. Renewable...

47

Windmill tower  

SciTech Connect

A windmill tower supports a propeller and a platform that in turn supports a propeller feather control system and a generator system. The entire tower rotates at its base under changes in wind direction so the rotating propeller is constantly maintained upwind of the tower. The tower is a rigid structure that withstands cyclic thrust and torque loading sufficiently to reduce resonant vibrations of the tower as the propeller rotates under the influence of the wind. The resonant frequency of the tower can be higher than the passing frequency of the rotating propeller blades. The tower includes a pair of generally upright fore legs that converge upwardly toward a first apex on the propeller axis of rotation near the front of the platform immediately behind the propeller hub. A diagonal bracing strut extends downwardly from the first apex away from the plane of the fore legs and toward the rear of the tower. The bottoms of the fore legs and the diagonal bracing strut are rigidly interconnected by base plane truss members. A pair of upwardly converging aft legs extend diagonally upwardly from the bottoms of the fore legs toward a second apex aft of the first apex at the rear of the platform. At regular vertical intervals, stiffening trusses add rigidity to the main upright members of the tower structure. The natural frequency of the tower is raised by the fore legs and the diagonal bracing strut being interconnected in a rigid base plane truss. The diagonal bracing strut resists thrust loading on the tower, and the fore legs and aft legs resist torsional forces produced at the top of the tower.

Schachle, C.; Schachle, E.C.; Schachle, J.R.; Schachle, P.J.

1982-04-06T23:59:59.000Z

48

Convection towers  

DOE Patents (OSTI)

Convection towers which are capable of cleaning the pollution from large quantities of air and of generating electricity utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity. Other embodiments may also provide fresh water, and operate in an updraft mode. 5 figures.

Prueitt, M.L.

1994-02-08T23:59:59.000Z

49

Shake Table Test on the 1:30 Model Structure of a Large Cooling Tower for Fire Power Plant  

Science Journals Connector (OSTI)

For understanding the seismic behaviour of extra-large scale cooling tower with dimension of 220 meters high and 188 meters in diameter, the shake table tests for its 1:30 (length ratio) tower model were carr...

J. W. Dai; X. R. Weng; Y. Hu

2014-01-01T23:59:59.000Z

50

EA-1911: Energy Conservation Standards for Certain Reflector, Elliptical Reflector, and Bulged Reflector Incandescent Lamps  

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

This EA will evaluate the environmental impacts of a proposal to amend energy conservation standards for Certain Reflector, Elliptical Reflector, and Bulged Reflector Incandescent Lamps.

51

A new code for the design and analysis of the heliostat field layout for power tower system  

Science Journals Connector (OSTI)

A new code for the design and analysis of the heliostat field layout for power tower system is developed. In the new code, a new method for the heliostat field layout is proposed based on the edge ray principle of nonimaging optics. The heliostat field boundary is constrained by the tower height, the receiver tilt angle and size and the heliostat efficiency factor which is the product of the annual cosine efficiency and the annual atmospheric transmission efficiency. With the new method, the heliostat can be placed with a higher efficiency and a faster response speed of the design and optimization can be obtained. A new module for the analysis of the aspherical heliostat is created in the new code. A new toroidal heliostat field is designed and analyzed by using the new code. Compared with the spherical heliostat, the solar image radius of the field is reduced by about 30% by using the toroidal heliostat if the mirror shape and the tracking are ideal. In addition, to maximize the utilization of land, suitable crops can be considered to be planted under heliostats. To evaluate the feasibility of the crop growth, a method for calculating the annual distribution of sunshine duration on the land surface is developed as well.

Xiudong Wei; Zhenwu Lu; Weixing Yu; Zhifeng Wang

2010-01-01T23:59:59.000Z

52

A new code for the design and analysis of the heliostat field layout for power tower system  

SciTech Connect

A new code for the design and analysis of the heliostat field layout for power tower system is developed. In the new code, a new method for the heliostat field layout is proposed based on the edge ray principle of nonimaging optics. The heliostat field boundary is constrained by the tower height, the receiver tilt angle and size and the heliostat efficiency factor which is the product of the annual cosine efficiency and the annual atmospheric transmission efficiency. With the new method, the heliostat can be placed with a higher efficiency and a faster response speed of the design and optimization can be obtained. A new module for the analysis of the aspherical heliostat is created in the new code. A new toroidal heliostat field is designed and analyzed by using the new code. Compared with the spherical heliostat, the solar image radius of the field is reduced by about 30% by using the toroidal heliostat if the mirror shape and the tracking are ideal. In addition, to maximize the utilization of land, suitable crops can be considered to be planted under heliostats. To evaluate the feasibility of the crop growth, a method for calculating the annual distribution of sunshine duration on the land surface is developed as well. (author)

Wei, Xiudong; Lu, Zhenwu; Yu, Weixing [Changchun Institute of Optics, Fine Mechanics and Physics of Chinese Academy of Sciences, Changchun 130033 (China); Wang, Zhifeng [The Key Laboratory of Solar Thermal Energy and Photovoltaic system, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190 (China)

2010-04-15T23:59:59.000Z

53

Renovation of steam electric power plant cooling tower blowdown for non-potable reuse. Technical report 2 Sep 81-15 Jan 84  

SciTech Connect

Findings are presented of a nine month pilot plant study investigating non-potable reuse potential of electric power plant cooling tower blowdown. The two demineralizing technologies studies included reverse osmosis and electrodialysis. Pretreatment throughout the testing was performed using chemical softening/clarification and dual media filtration. During the investigation, about 4,000 operating hours were put on each of the two desalting technology membranes to obtain information on membrane life expectancy. The most promising treatment technologies which meet the make-up water quality requirements for reuse of the cooling tower blowdown in the tower recirculating water system, as determined by pilot treatment train performance, are discussed. Potential power plant water reuse applications have been identified along with the water quality and quantity requirements. Comparisons were then made to the treated blowdown quality achieved from each of the pilot process elements.

Osantowski, R.; Kane, J.; Geinopolos, A.

1984-01-01T23:59:59.000Z

54

Optimal heliostat aiming strategy for uniform distribution of heat flux on the receiver of a solar power tower plant  

Science Journals Connector (OSTI)

Abstract Temperature distribution on the receiver surface of a solar power tower plant is of great importance. High temperature gradients may lead to local hot spots and consequently failure of the receiver. The temperature distribution can be controlled by defining several aiming points on the receiver surface and adjusting the heliostats accordingly. In this paper, a new optimization algorithm which works based on the principles of genetic algorithm is developed to find the optimal flux distribution on the receiver surface. The objective is to minimize the standard deviation of the flux density distribution by changing the aiming points of individual heliostats. Flux distribution of each heliostat is found by using the HFLCAL model [1], which is validated against experimental data. The results show that after employing the new algorithm the maximum flux density is reduced by an order of magnitude. The effects of number of aiming points and size of the aiming surface on the flux density distribution are investigated in detail.

Saeb M. Besarati; D. Yogi Goswami; Elias K. Stefanakos

2014-01-01T23:59:59.000Z

55

Advanced Manufacture of Reflectors  

SciTech Connect

The main project objective has been to develop an advanced gravity sag method for molding large glass solar reflectors with either line or point focus, and with long or short focal length. The method involves taking standard sized squares of glass, 1.65 m x 1.65 m, and shaping them by gravity sag into precision steel molds. The method is designed for high volume manufacture when incorporated into a production line with separate pre-heating and cooling. The performance objectives for the self-supporting glass mirrors made by this project include mirror optical accuracy of 2 mrad root mean square (RMS), requiring surface slope errors <1 mrad rms, a target not met by current production of solar reflectors. Our objective also included development of new methods for rapidly shaping glass mirrors and coating them for higher reflectivity and soil resistance. Reflectivity of 95% for a glass mirror with anti-soil coating was targeted, compared to the present ~94% with no anti-soil coating. Our mirror cost objective is ~$20/m2 in 2020, a significant reduction compared to the present ~$35/m2 for solar trough mirrors produced for trough solar plants. During the first year a custom batch furnace was built to develop the method with high power radiative heating to simulate transfer of glass into a hot slumping zone in a production line. To preserve the original high polish of the float glass on both front and back surfaces, as required for a second surface mirror, the mold surface is machined to the required shape as grooves which intersect the glass at cusps, reducing the mold contact area to significantly less than 1%. The mold surface is gold-plated to reflect thermal radiation. Optical metrology of glass replicas made with the system has been carried out with a novel, custom-built test system. This test provides collimated, vertically-oriented parallel beams from a linear array of co-aligned lasers translated in a perpendicular direction across the reflector. Deviations of each reflected beam from the paraboloid focus give a direct measure of surface slope error. Key findings A gravity sag method for large (2.5 m2) second surface glass solar reflectors has been developed and demonstrated to a uniquely high level of accuracy. Mirror surface slope accuracy of 0.65 mrad in one dimension, 0.85 mrad in 2 dimensions (point focus) has been demonstrated by commercial partner REhnu using this process. This accuracy exceeds by a factor of two current solar reflector accuracy. Our replicas meet the Sunshot accuracy objective of 2 mrad optical, which requires better than 1 mrad rms slope error. Point-focus as well as line-focus mirrors have been demonstrated at 1.65 m x 1.65 m square a unique capability. The new process using simple molds is economical. The molds for the 1.65 m square reflectors are bent and machined steel plates on a counter-weighted flotation support. To minimize thermal coupling by radiative heat transfer, the mold surface is grooved and gilded. The molds are simple to manufacture, and have minimal thermal stresses and distortion in use. Lapping and bending techniques have been developed to obtain better than 1 mrad rms surface mold accuracy. Float glass is sagged into the molds by rapid radiative heating, using a custom high power (350 kW) furnace. The method of manufacture is well suited for small as well as large volume production, and as it requires little capital investment and no high technology, it could be used anywhere in the world to make solar concentrating reflectors. A novel slope metrology method for full 1.65 aperture has been demonstrated, with 25 mm resolution across the face of the replicas. The method is null and therefore inherently accurate: it can easily be reproduced without high-tech equipment and does not need sophisticated calibration. We find by cross calibration with reference trough reflectors from RioGlass that our null-test laser system yields a measurement accuracy better than 0.4 mrad rms slope error. Our system is inexpensive and could have broad application for test

Angel, Roger [University of Arizona

2014-12-17T23:59:59.000Z

56

Nuclear reactor reflector  

DOE Patents (OSTI)

A nuclear reactor reflector is disclosed that comprises a stack of reflector blocks with vertical water flow passages to cool the reflector. The interface between blocks is opposite support points for reactor fuel rods. Water flows between the reflector and the reactor barrel from passages in a bottom block. The top block contains a flange to limit this flow and the flange has a slot to receive an alignment pin that is welded to the barrel. The pin is held in the slot by two removable shims. Alignment bars extend the length of the stack in slots machined in each block when the stack is assembled.

Hopkins, Ronald J. (Pensacola, FL); Land, John T. (Pensacola, FL); Misvel, Michael C. (Pensacola, FL)

1994-01-01T23:59:59.000Z

57

Conceptional Design of Solar Power Plant with Central Receiver Tower Based on Improved Heliostats  

Science Journals Connector (OSTI)

For technical and economical evaluations of solar power plant, the comparisons from technical points and electricity cost are presented on the solar plant with the heliostats based on new material and configurati...

H. Yoshikawa; N. Ikeda

1985-01-01T23:59:59.000Z

58

SunShot Initiative: Advanced Manufacture of Reflectors  

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

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

59

High-temperature Thermal Storage System for Solar Tower Power Plants with Open-volumetric Air Receiver Simulation and Energy Balancing of a Discretized Model  

Science Journals Connector (OSTI)

Abstract This paper describes the modeling of a high-temperature storage system for an existing solar tower power plant with open volumetric receiver technology, which uses air as heat transfer medium (HTF). The storage system model has been developed in the simulation environment Matlab/Simulink. The storage type under investigation is a packed bed thermal energy storage system which has the characteristics of a regenerator. Thermal energy can be stored and discharged as required via the HTF air. The air mass flow distribution is controlled by valves, and the mass flow by two blowers. The thermal storage operation strategy has a direct and significant impact on the energetic and economic efficiency of the solar tower power plants.

Valentina Kronhardt; Spiros Alexopoulos; Martin Reiel; Johannes Sattler; Bernhard Hoffschmidt; Matthias Hnel; Till Doerbeck

2014-01-01T23:59:59.000Z

60

CXAllenRadioTower2.pdf  

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

Southwestern Power Administration proposes to modify and reconstruct its Allen Radio Tower communications site as part of the Spectrum Relocation project. Categorical...

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


61

Multi-objective optimization of solar tower heliostat fields  

E-Print Network (OSTI)

Multi-objective optimization of solar tower heliostat fields Pascal Richter, Martin Frank and Erika Introduction Solar tower plants generate electric power from sunlight by focusing concentrated solar radiation electricity. Fig. 1 Solar tower plant PS10, 11 MW in Andalusia, Spain. [Source: flickr] Solar tower plants

Ábrahám, Erika

62

Vortex-augmented cooling tower - windmill combination  

DOE Patents (OSTI)

A cooling tower for cooling large quantities of effluent water from a production facility by utilizing natural wind forces includes the use of a series of helically directed air inlet passages extending outwardly from the base of the tower to introduce air from any direction in a swirling vortical pattern while the force of the draft created in the tower makes it possible to place conventional power generating windmills in the air passage to provide power as a by-product.

McAllister, J.E. Jr.

1982-09-02T23:59:59.000Z

63

Solar central receiver heliostat reflector assembly  

DOE Patents (OSTI)

A heliostat reflector assembly for a solar central receiver system comprises a light-weight, readily assemblable frame which supports a sheet of stretchable reflective material and includes mechanism for selectively applying tension to and positioning the sheet to stretch it to optical flatness. The frame is mounted on and supported by a pipe pedestal assembly that, in turn, is installed in the ground. The frame is controllably driven in a predetermined way by a light-weight drive system so as to be angularly adjustable in both elevation and azimuth to track the sun and efficiently continuously reflect the sun's rays to a focal zone, i.e. central receiver, which forms part of a solar energy utilization system, such as a solar energy fueled electrical power generation system. The frame may include a built-in system for testing for optical flatness of the reflector. The preferable geometric configuration of the reflector is octagonal; however, it may be other shapes, such as hexagonal, pentagonal or square. Several different embodiments of means for tensioning and positioning the reflector to achieve optical flatness are disclosed. The reflector assembly is based on the stretch frame concept which provides an extremely light-weight, simple, low-cost reflector assembly that may be driven for positioning and tracking by a light-weight, inexpensive drive system.

Horton, Richard H. (Schenectady, NY); Zdeb, John J. (Clifton Park, NY)

1980-01-01T23:59:59.000Z

64

Life Cycle Environmental Impacts Resulting from the Manufacture of the Heliostat Field for a Reference Power Tower Design in the United States: Preprint  

SciTech Connect

Life cycle assessment (LCA) is recognized as a useful analytical approach for quantifying environmental impacts of renewable energy technologies, including concentrating solar power (CSP). An LCA accounts for impacts from all stages in the development, operation, and decommissioning of a CSP plant, including such upstream stages as the extraction of raw materials used in system components, manufacturing of those components, and construction of the plant. The National Renewable Energy Laboratory is conducting a series of LCA studies for various CSP technologies. This paper contributes to a thorough LCA of a 100 MWnet molten salt power tower CSP plant by estimating the environmental impacts resulting from the manufacture of heliostats. Three life cycle metrics are evaluated: greenhouse gas emissions, water consumption, and cumulative energy demand. The heliostat under consideration (the 148 m2 Advanced Thermal Systems heliostat) emits 5,300 kg CO2eq, consumes 274 m3 of water, and requires 159,000 MJeq during its manufacture. Future work will incorporate the results from this study into the LCA model used to estimate the life cycle impacts of the entire 100 MWnet power tower CSP plant.

Heath, G.; Burkhardt, J.; Turchi, C.

2012-10-01T23:59:59.000Z

65

Advanced Manufacture of Reflectors  

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

The Advance Manufacture of Reflectors fact sheet describes a SunShot Initiative project being conducted research team led by the University of Arizona, which is working to develop a novel method for shaping float glass. The technique developed by this research team can drastically reduce the time required for the shaping step. By enabling mass production of solar concentrating mirrors at high speed, this project should lead to improved performance and as much as a 40% reduction in manufacturing costs for reflectors made in very high volume.

66

Glass for Reflectors  

Science Journals Connector (OSTI)

... "for the 4-foot disc of glass for the Paris reflector, in place of that which has so recently resulted in ... in place of that which has so recently resulted in failure, the St. Gobain Glass Company require twelve months' time to perfect (although, be it remembered, the quality ...

HENRY BESSEMER

1878-01-24T23:59:59.000Z

67

Towers for Offshore Wind Turbines  

Science Journals Connector (OSTI)

Increasing energy demand coupled with pollution free production of energy has found a viable solution in wind energy. Land based windmills have been utilized for power generation for more than two thousand years. In modern times wind generated power has become popular in many countries. Offshore wind turbines are being used in a number of countries to tap the energy from wind over the oceans and convert to electric energy. The advantages of offshore wind turbines as compared to land are that offshore winds flow at higher speed than onshore winds and the more available space. In some land based settings for better efficiency turbines are separated as much as 10 rotor diameters from each other. In offshore applications where only two wind directions are likely to predominate the distances between the turbines arranged in a line can be shortened to as little as two or four rotor diameters. Today more than a dozen offshore European wind facilities with turbine ratings of 450 kw to 3.6 MW exist offshore in very shallow waters of 5 to 12 m. Compared to onshore wind turbines offshore wind turbines are bigger and the tower height in offshore are in the range of 60 to 80 m. The water depths in oceans where offshore turbines can be located are within 30 m. However as the distance from land increases the costs of building and maintaining the turbines and transmitting the power back to shore also increase sharply. The objective of this paper is to review the parameters of design for the maximum efficiency of offshore wind turbines and to develop types offshore towers to support the wind turbines. The methodology of design of offshore towers to support the wind turbine would be given and the environmental loads for the design of the towers would be calculated for specific cases. The marine corrosion on the towers and the methods to control the corrosion also would be briefly presented. As the wind speeds tend to increase with distance from the shore turbines build father offshore will be able to capture more wind energy. Currently two types of towers are considered. Cylindrical tubular structures and truss type structures. But truss type structures have less weight and flexibility in design. The construction of the offshore towers to harness the wind energy is also presented. The results will include the calculation of wind and wave forces on the tower and the design details for the tower.

V. J. Kurian; S. P. Narayanan; C. Ganapathy

2010-01-01T23:59:59.000Z

68

On thermal performance of seawater cooling towers  

E-Print Network (OSTI)

Seawater cooling towers have been used since the 1970s in power generation and other industries, so as to reduce the consumption of freshwater. The salts in seawater are known to create a number of operational problems, ...

Sharqawy, Mostafa H.

69

Building a Better Transmission Tower | Department of Energy  

Energy Savers (EERE)

500-kilovolt tower one of hundreds on the McNary-John Day line saving BPA big bucks. | Photo courtesy of Bonneville Power Administration A helicopter hoists...

70

SunShot Initiative: Next-Generation Low-Cost Reflector  

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

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

71

Sandia National Laboratories: solar power  

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

Features of Power Towers for Utilities Because of their practical energy storage, solar power towers have two features that are particularly desirable for utilities: flexible...

72

Numerical analysis of the influence of inclination angle and wind on the heat losses of cavity receivers for solar thermal power towers  

Science Journals Connector (OSTI)

Abstract The convective heat losses of cavity receivers for solar thermal power towers are of great importance for the overall efficiency of the whole system. However, the influence of wind on these losses has not been studied sufficiently for large scale cavity receivers with different inclination angles. In this present study the impact of head-on and side-on wind on large cavity receivers with inclination angles in the range of 0 (horizontal cavity) to 90 (vertical cavity) is analyzed numerically. The simulation results are compared to data published in literature. When no wind is present the losses decrease considerably with increasing inclination angle of the receiver. In case of a horizontal receiver wind does not have a huge impact on the losses: they remain constant on a high level. In case of an inclined cavity wind increases the heat losses significantly in most of the cases, although the highest absolute value of the losses occurs for the horizontal receiver exposed to head on wind. In some cases, when wind is flowing parallel to the aperture plane, a reduction of the heat losses is observed. The temperature distribution in the cavity is analyzed in order to explain the impact of wind on the heat losses. Wind in general causes a shrinking of the zone with uniform high temperature in the upper region of the cavity, whereas wind flowing parallel to the aperture plane additionally inhibits hot air from leaving the cavity and therefore leads to an increased temperature in the lower zone.

Robert Flesch; Hannes Stadler; Ralf Uhlig; Robert Pitz-Paal

2014-01-01T23:59:59.000Z

73

A study of the operating conditions and power performance characteristics of power units upon increasing the cooling capacity of their chimney-type cooling towers  

Science Journals Connector (OSTI)

The operating conditions and power performance characteristics of the Armenian nuclear power stations Unit 2 equipped with a ... 4.3 turbine and of the Razdan district power stations units equipped with K-200- ...

A. K. Muradyan; D. T. Arshakyan

2007-11-01T23:59:59.000Z

74

Vice President CEO, Tower Foundation  

E-Print Network (OSTI)

Vice President CEO, Tower Foundation Administrative Assistant to the AVP Information Representative Tower Foundation Charitable Gifts Officer Gift Analyst Gift Analyst Gift Analyst Senior Analyst Tower Foundation Stewardship Director Graphic Designer Administrative Assistant Web Communications

Su, Xiao

75

Sandia National Laboratories: Power Towers  

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

Doppler Velocimeter EC Top Publications A Comparison of Platform Options for Deep-water Floating Offshore Vertical Axis Wind Turbines: An Initial Study Nonlinear Time-Domain...

76

Cooling Towers- Energy Conservation Strategies Understanding Cooling Towers  

E-Print Network (OSTI)

Cooling towers are energy conservation devices that Management, more often than not, historically overlooks in the survey of strategies for plant operating efficiencies. The utilization of the colder water off the cooling tower is the money maker!...

Smith, M.

77

Dynamic response of guyed towers  

E-Print Network (OSTI)

guyed towers. A parametric study was conducted using eigen analysis to determine the effects of consistent mass, geometric stiffness and P-Delta gravity loads. Time domain solutions were obtained by direct integration for motion due to regular Stokes... guyed tower 2 References to guyed tower dynamic analysis 4 Effect of mass formulation on tower natural periods. 5 P-Delta effect on fundamental period. 6 Effect of axial compression on the 1st & 2nd mode. 7 Geometric stiffness effect on natural...

Gillcrist, Mark Christopher

2012-06-07T23:59:59.000Z

78

Suppression of the vibrations of wind turbine towers  

Science Journals Connector (OSTI)

......suppression of the vibrations of wind turbine towers. As a source of renewable and clean energy, wind power is rapidly increasing its...capacity in many countries. Large offshore turbines are subjected to severe weather......

Xiaowei Zhao; George Weiss

2011-09-01T23:59:59.000Z

79

Windmill tower shadow eliminator  

SciTech Connect

In a wind driven propeller system an airfoil support for the shaft of a propeller having an even number of blades extends above and below the shaft a distance at least equal to the blade length and pivots with the propeller into the wind for substantially eliminating tower shadow effects on the propeller.

Randolph, A.J.

1984-04-17T23:59:59.000Z

80

Pueblo Towers | Open Energy Information  

Open Energy Info (EERE)

Towers Towers Jump to: navigation, search Name Pueblo Towers Facility Pueblo Towers Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Vestas Towers Developer Vestas Towers Energy Purchaser Vestas Towers Location CO Coordinates 38.205834°, -104.588141° 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":38.205834,"lon":-104.588141,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

Note: This page contains sample records for the topic "reflector power tower" 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

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network (OSTI)

Design. Propofied Solar Cooling Tower Type Wet-Cooled Powerdry-cooling tower was used in the proposed solar power plantTower Power-Generation Subsystem Summary An Overall Summary of the Proposed Solar

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

82

Use of nanofiltration to reduce cooling tower water usage.  

SciTech Connect

Nanofiltration (NF) can effectively treat cooling-tower water to reduce water consumption and maximize water usage efficiency of thermoelectric power plants. A pilot is being run to verify theoretical calculations. A side stream of water from a 900 gpm cooling tower is being treated by NF with the permeate returning to the cooling tower and the concentrate being discharged. The membrane efficiency is as high as over 50%. Salt rejection ranges from 77-97% with higher rejection for divalent ions. The pilot has demonstrated a reduction of makeup water of almost 20% and a reduction of discharge of over 50%.

Sanchez, Andres L.; Everett, Randy L.; Jensen, Richard Pearson; Cappelle, Malynda A.; Altman, Susan Jeanne

2010-09-01T23:59:59.000Z

83

NREL: Concentrating Solar Power Research - Data and Resources  

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

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

84

SunShot Initiative: Baseload Concentrating Solar Power Generation  

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

Concentrating Solar Power Generation Concentrating Solar Power Generation In 2010, DOE issued the Baseload Concentrating Solar Power (CSP) Generation funding opportunity announcement (FOA). The following projects were selected under this competitive solicitation: Abengoa: Advanced Nitrate Salt Central Receiver Power Plant eSolar: Modular and Scalable Baseload Molten Salt Plant Conceptual Design and Feasibility General Atomics: Baseload CSP Generation Integrated with Sulfur-Based Thermochemical Heat Storage HiTek: Low-Cost Heliostat Development Infinia: Innovative Phase Change Thermal Energy Storage Solution for Baseload Power PPG: Next-Generation Low-Cost Reflector Rocketdyne: Solar Power Tower Improvements with the Potential to Reduce Costs SENER: High-Efficiency Thermal Storage System for Solar Plants

85

TOWER-TRACKING HELIOSTAT ARRAY.  

E-Print Network (OSTI)

?? This thesis presents a method of tracking and correcting for the swaying of a central receiver tower in concentrated solar production plants. The method (more)

Masters, Joel T

2011-01-01T23:59:59.000Z

86

Cooling Towers Make Money  

E-Print Network (OSTI)

was hired and wrote specifications for a four cell induced draft counterflow cooling tower to cool 10,000 GPM entering at 95 0 F leaving at 85 0 F during an 80 0 F ambient wet bulb temperature. The specifications required that the bidders project a... F during an ambient wet bulb temperature of 7] OF could not be met The SuperCellular film fill, style] 3] 62 Illustration 3 was selected by the consultant because of its previous highly satisfactory service in sewage treatment trickling filter...

Burger, R.

87

FLORIDA TOWER FOOTPRINT EXPERIMENTS  

SciTech Connect

The Florida Footprint experiments were a series of field programs in which perfluorocarbon tracers were released in different configurations centered on a flux tower to generate a data set that can be used to test transport and dispersion models. These models are used to determine the sources of the CO{sub 2} that cause the fluxes measured at eddy covariance towers. Experiments were conducted in a managed slash pine forest, 10 km northeast of Gainesville, Florida, in 2002, 2004, and 2006 and in atmospheric conditions that ranged from well mixed, to very stable, including the transition period between convective conditions at midday to stable conditions after sun set. There were a total of 15 experiments. The characteristics of the PFTs, details of sampling and analysis methods, quality control measures, and analytical statistics including confidence limits are presented. Details of the field programs including tracer release rates, tracer source configurations, and configuration of the samplers are discussed. The result of this experiment is a high quality, well documented tracer and meteorological data set that can be used to improve and validate canopy dispersion models.

WATSON,T.B.; DIETZ, R.N.; WILKE, R.; HENDREY, G.; LEWIN, K.; NAGY, J.; LECLERC, M.

2007-01-01T23:59:59.000Z

88

Best Management Practice #10: Cooling Tower Management  

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

Cooling towers regulate temperature by dissipating heat from recirculating water used to cool chillers, air-conditioning equipment, or other process equipment. Heat is rejected from the tower...

89

Distributed Bragg Reflectors With Reduced Optical Absorption  

DOE Patents (OSTI)

A new class of distributed Bragg reflectors has been developed. These distributed Bragg reflectors comprise interlayers positioned between sets of high-index and low-index quarter-wave plates. The presence of these interlayers is to reduce photon absorption resulting from spatially indirect photon-assisted electronic transitions between the high-index and low-index quarter wave plates. The distributed Bragg reflectors have applications for use in vertical-cavity surface-emitting lasers for use at 1.55 .mu.m and at other wavelengths of interest.

Klem, John F. (Albuquerque, NM)

2005-08-16T23:59:59.000Z

90

Improving Process Cooling Tower Eddiciency  

E-Print Network (OSTI)

of the Thrity-Fifth Industrial Energy Technology Conference New Orleans, LA. May 21-24, 2013 7 Improving Cooling Tower Efficiency ? Two Improvements in Capacity/Performance 1. Filtration for water quality control Side stream filtration Make up water quality...-Fifth Industrial Energy Technology Conference New Orleans, LA. May 21-24, 2013 2 Types of Cooling Towers Forced Draft Towers ESL-IE-13-05-08 Proceedings of the Thrity-Fifth Industrial Energy Technology Conference New Orleans, LA. May 21-24, 2013 3 Types...

Turpish, W.

2013-01-01T23:59:59.000Z

91

Accident Investigation of the September 20, 2012 Fatal Fall from the Dworshak-Taft #1 Transmission Tower, at the Bonneville Power Marketing Administration  

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

This report is an independent product of the Level l Accident Investigation Board appointed by Brad Bea, Chief Safety Officer, Bonneville Power Administration. The Board was appointed to perform a Levell Accident Investigation and to prepare an investigation report in accordance with Bonneville Power Administration Manual, Chapter 181, Accident Investigation and Reporting

92

Modeling and Simulation of Solar Chimney Power Plant with and without the Effect of Thermal Energy Storage Systems.  

E-Print Network (OSTI)

??A solar updraft tower power plant sometimes also called 'solar chimney' or just solar tower is a solar thermal power plant utilizing a (more)

Daba, Robera

2011-01-01T23:59:59.000Z

93

Cooling Tower Inspection with Scuba  

E-Print Network (OSTI)

A serious problem of scale and other solid material settling in heat transfer equipment was threatening to shut down our ethylene plant. All evidence pointed to the cooling tower as the source of the contamination. Visual inspection of the cooling...

Brenner, W.

1982-01-01T23:59:59.000Z

94

LQG control of horizontal wind turbines for blades and tower loads alleviation  

E-Print Network (OSTI)

LQG control of horizontal wind turbines for blades and tower loads alleviation A. Pintea*, N of power produced by two bladed horizontal variable speed wind turbines. The proposed controller ensures oscillations and with the tower bending tendency. Keywords: LQG control, Wind turbines, Multi-objective control

Paris-Sud XI, Université de

95

Long-range, full-duplex, modulated-reflector cell phone for voice/data transmission  

DOE Patents (OSTI)

A long-range communications apparatus utilizing modulated-reflector technology is described. The apparatus includes an energy-transmitting base station and remote units that do not emit radiation in order to communicate with the base station since modulated-reflector technology is used whereby information is attached to an RF carrier wave originating from the base station which is reflected by the remote unit back to the base station. Since the remote unit does not emit radiation, only a low-power power source is required for its operation. Information from the base station is transmitted to the remote unit using a transmitter and receiver, respectively. The range of such a communications system is determined by the properties of a modulated-reflector half-duplex link.

Neagley, Daniel L. (Albuquerque, NM); Briles, Scott D. (Los Alamos, NM); Coates, Don M. (Santa Fe, NM); Freund, Samuel M. (Los Alamos, NM)

2002-01-01T23:59:59.000Z

96

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

97

Cooling Towers, Energy Conservation Strategies  

E-Print Network (OSTI)

undersized due to the low bidder syndrome (1). 4. New plant expansion needs colder temperatures off the tower. State of the Art Upgrading Users of cooling towers are not par ticularly concerned with the thermal analysis involving calculus, or delving... HISTORY I Anhydrous Ammonia Plant The Hawkeye Chemical Corporation, a subsidiary of the Getty Oil Company, pro jected a 50% expansion of their anhydroug ammonia output from 120,000 tons (1.09 Kg) per year to ~ production level of 225,000 tons (2...

Burger, R.

1983-01-01T23:59:59.000Z

98

Commissioning through "EDF Tower" construction  

E-Print Network (OSTI)

michel rouillot -architecte d.p.l.g. CommissioningCommissioningthrough through ??EDF TowerEDF Tower? construction? construction by Michel Rouillot Architect D.P.L.G. michel rouillot -architecte d.p.l.g. What is a building project ? michel rouillot... -architecte d.p.l.g. A spatial answerfor a work structure michel rouillot -architecte d.p.l.g. A very strong relationship between many building participants michel rouillot -architecte d.p.l.g. The production of the buildingThe production of the building...

Rouillot, M.

2004-01-01T23:59:59.000Z

99

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

E-Print Network (OSTI)

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

Norwood, Zachary Mills

2011-01-01T23:59:59.000Z

100

GreenTower | Open Energy Information  

Open Energy Info (EERE)

GreenTower Jump to: navigation, search Name: GreenTower Place: Haiger 6, Germany Zip: 35708 Sector: Solar Product: Developer of a solar chimney technology, with greenhouses for...

Note: This page contains sample records for the topic "reflector power tower" 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

Alternative Energy Technologies Solar Power  

E-Print Network (OSTI)

#12;Alternative Energy Technologies Solar Power Photovoltaics Concentrating Solar Power (CSP) Power;Concentrating Solar Power (CSP) Reflector material is Aluminum or Silver Tube material ..... Several possible, Philippines Vanadium ........ Swaziland, Central Africa Zinc ................ Peru, Canada, Mexico Silver

Scott, Christopher

102

The solar towers of Chankillo  

E-Print Network (OSTI)

An ancient solar observatory is composed by thirteen towers lined on a hill of a coastal desert of Peru. This is the Chankillo observatory. Here we discuss it, showing some simulations of the local sun direction. An analysis of the behaviour of shadows is also proposed.

Sparavigna, Amelia Carolina

2012-01-01T23:59:59.000Z

103

NREL: Concentrating Solar Power Research - Collector R&D  

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

Collector R&D Collector R&D Featured Resource Learn more about NREL's capabilities in collector/receiver characterization. Collector research at NREL focuses on developing and testing the next generation of concentrating solar power (CSP) collectors that reduce delivered electricity costs by 50%. NREL's work involves improved reflector development, optical model development, optical measurement techniques, testing standards, and reliability assessments. NREL also works to upgrade and adapt optical tools to enhance laboratory testing capabilities. CSP collectors capture the sun's energy with mirrors that reflect and focus the sunlight onto a receiver, creating the heat that is used to generate electricity. Opportunities and Potential Impact Collectors-whether for parabolic trough, power tower, or dish

104

Benefit of Lunar Regolith on Reflector Mass Savings  

SciTech Connect

The 2004 NASA Vision for Space Exploration calls for the return of mankind to the moon by no later than 2020, in preparation for an adventure to Mars and beyond. An envisioned lunar outpost will provide living quarters for initially 5- 10 astronauts for up to 2 weeks, and latter for science experiments, and recovery of mineral and indigenous resources for the day-to-day operation and production of propellant. These activities would require electrical and thermal powers in the order of 10's - 100's of kilowatts 24/7. Potential power options include photovoltaic, requiring massive batteries or fuel cells for energy storage during the long nights on the moon, and nuclear reactor power systems, which are much more compact and operate independent of the sun. This paper examines the benefit of using the lunar regolith as a supplemental neutron reflector on decreasing the launch mass of the Sectored Compact Reactor (SCoRe-S), developed at the Institute for Space and Nuclear Power Studies. In addition to providing at least $2.00 of hot-clean excess reactivity at the beginning of life, various SCoRe-S concepts investigated in this paper are at least $1.00 sub-critical when shutdown, and when the bare reactor cores are submerged in wet sand and flooded with seawater, following a launch abort accident. Design calculations performed using MCNP5 confirmed that using lunar regolith as supplementary reflector reduces the launch mass of the SCoRe-S cores by {approx} 34% - 35%, or 150 - 200 kg, while satisfying the above reactivity requirements.

Hatton, Steven A.; El-Genk, Mohamed S. [Institute for Space and Nuclear Power Studies, University of New Mexico, Albuquerque, NM 87131-0001 (United States); Dept. of Chemical and Nuclear Engineering, University of New Mexico, Albuquerque, NM 87131-0001 (United States)

2007-01-30T23:59:59.000Z

105

Optical and Durability Evaluation for Silvered Polymeric Mirrors and Reflectors: Cooperative Research and Development Final Report, CRADA Number, CRD-08-316  

SciTech Connect

3M is currently developing silvered polymeric mirror reflectors as low-cost replacements for glass mirrors in concentrating solar power (CSP) systems. This effort is focused on development of reflectors comprising both metallized polymeric mirror films based on improved versions of ECP-305+ or other durable mirror film concepts and appropriate mechanically robust substrates. The objectives for this project are to reduce the system capital and operating costs and to lower the levelized cost of energy for CSP installations. The development of mirror reflectors involves work on both full reflectors and mirror films with and without coatings. Mirror reflectors must meet rigid optical specifications in terms of radius of curvature, slope errors and specularity. Mirror films must demonstrate long-term durability and maintain high reflectivity. 3M would like to augment internal capabilities to validate product performance with methods and tools developed at NREL to address these areas.

Gray, M.

2014-08-01T23:59:59.000Z

106

Comparative life cycle assessment of tubular wind towers and foundations Part 2: Life cycle analysis  

Science Journals Connector (OSTI)

Abstract In the first part of the paper the design of tubular towers and respective onshore foundations was addressed. The considered solutions were based on steel, concrete and hybrid steel-concrete tubular towers supporting multi-megawatt turbines of 2, 3.6 and 5MW power with hub heights of 80, 100 and 150m respectively. In this second part of the paper, the life cycle analysis of the designed case studies is performed and conclusions about their environmental impact are drawn. Two different scenarios concerning the lifetime of the towers were established. The first scenario considers 20years lifetime and two different construction methods for the connection of the steel segments, the first based in current technology using flange connections and the second using newly developed friction connections. Assuming equal importance for all environmental categories in this scenario, it may be concluded that for heights up to 100m hybrid towers with friction connections are the most efficient solution. For higher heights, the concrete tower becomes more efficient. The second scenario considers an increased total lifetime of 40years, assuming the reuse of the tower after 20years of operation. In this case, the use of friction connections in steel towers enhances the possibility of dismantling and reusing the tower potentiating much better performance in relation to the environmental category of global warming.

H. Gervsio; C. Rebelo; A. Moura; M. Veljkovic; L. Simes da Silva

2014-01-01T23:59:59.000Z

107

Feasibility Study of Economics and Performance of Solar Photovoltaics at the Tower Road Site in Aurora, Colorado. A Study Prepared in Partnership with the Environmental Protection Agency for the RE-Powering America's Land Initiative: Siting Renewable Energy on Potentially Contaminated Land and Mine Sites  

SciTech Connect

The U.S. Environmental Protection Agency (EPA), in accordance with the RE-Powering America's Land initiative, selected the Tower Road site in Aurora, Colorado, for a feasibility study of renewable energy production. The National Renewable Energy Laboratory (NREL) provided technical assistance for this project. The purpose of this report is to assess the site for a possible photovoltaic (PV) system installation and estimate the cost, performance, and site impacts of different PV options. In addition, the report recommends financing options that could assist in the implementation of a PV system at the site. This study did not assess environmental conditions at the site.

Van Geet, O.; Mosey, G.

2013-03-01T23:59:59.000Z

108

Lighting Group: Sources and Ballasts: LED Reflector Lamp  

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

LED Reflector Lamp LED Reflector Lamp LED Reflector Lamp Objective LED reflector lamp The goal of this project is to develop a revolutionary new reflector lamp which offers many advantages over current incandescent reflector lamps, including: three times greater efficiency ten times the rated life greater optical and performance properties use of light emitting diodes (LEDs) to generate the light. Although LEDs have been commercially available since the late 1960’s, recent dramatic improvements in LED technology have led to white light devices with efficiencies that meet or exceed those of a standard incandescent lamp. This project will build upon these improvements to develop a new type of source for focusing light. Contact Information For more information on this project, please contact:

109

Variable Frequency AC Drives for Cooling Tower Energy Efficiency  

E-Print Network (OSTI)

and economics. Automatic fan speed control by sensing cold water temperature is the economic essence of the application of adjustable frequency power to A-C fan motors. 2.2 Cell Partitions In some multi-cell mechanical-draft cooling towers, the isolation... of individual cell air streams is ineffective due to one or more of the following: --Partitions are missing. --Partitions are incomplete. This condition results in temperature control problems. For example, if constant CWT is desired, and no means...

Corey, R. W.

1982-01-01T23:59:59.000Z

110

Vertical sampling flights in support of the 1981 ASCOT cooling tower experiments: field effort and data  

SciTech Connect

During the month of August 1981, three nights of experimental sampling of tracers released into the cooling tower plume of a geothermal power plant were conducted. In these experiments a tethered balloon was used to lift a payload so as to obtain vertical profiles of the cooling tower plume and the entrained tracers. A description of the equipment used, the field effort and the data acquired are presented here.

Gay, G.T.

1982-03-01T23:59:59.000Z

111

High-Temperature Solar Selective Coating Development for Power...  

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

High-Temperature Solar Selective Coating Development for Power Tower Receivers - FY13 Q2 High-Temperature Solar Selective Coating Development for Power Tower Receivers - FY13 Q2...

112

Untapped Energy Savings from Cooling Towers  

E-Print Network (OSTI)

flow changes the tower?s performance also by about 1%. Internal Influences So, where can easy improvements be found? One of the easiest is balancing the water distribution systems from one cell to the next. Balancing a crossflow tower means... making sure each of the distribution basins has the same water height. Figure 2 shows two adjacent basins where the closer basin height is about 7? lower than the farther basin height. We balanced basins on a 7 cell crossflow tower that had basins...

Phelps Jr., P.

2011-01-01T23:59:59.000Z

113

A Microcomputer Model of Crossflow Cooling Tower Performance  

E-Print Network (OSTI)

The energy use characteristics of evaporative cooling towers are of interest because, although such towers are widely used in industry, they do require a substantial amount of energy. Evaporative cooling towers are basically large heat exchangers...

Reichelt, G. E; Jones, J. W.

1984-01-01T23:59:59.000Z

114

Wind turbine tower for storing hydrogen and energy  

DOE Patents (OSTI)

A wind turbine tower assembly for storing compressed gas such as hydrogen. The tower assembly includes a wind turbine having a rotor, a generator driven by the rotor, and a nacelle housing the generator. The tower assembly includes a foundation and a tubular tower with one end mounted to the foundation and another end attached to the nacelle. The tower includes an in-tower storage configured for storing a pressurized gas and defined at least in part by inner surfaces of the tower wall. In one embodiment, the tower wall is steel and has a circular cross section. The in-tower storage may be defined by first and second end caps welded to the inner surface of the tower wall or by an end cap near the top of the tower and by a sealing element attached to the tower wall adjacent the foundation, with the sealing element abutting the foundation.

Fingersh, Lee Jay (Westminster, CO)

2008-12-30T23:59:59.000Z

115

Composite Tower Solutions | Open Energy Information  

Open Energy Info (EERE)

Solutions Solutions Jump to: navigation, search Name Composite Tower Solutions Place Provo, Utah Zip 84604 Sector Wind energy Product Composite Tower Solutions manufactures equipment for wind resource assessment needs, including meteorological towers, weather towers, and data collection and instrumentation towers. Coordinates 40.233765°, -111.668509° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.233765,"lon":-111.668509,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

116

Federal Energy Management Program: Best Management Practice: Cooling Tower  

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

Cooling Tower Management to someone by E-mail Cooling Tower Management to someone by E-mail Share Federal Energy Management Program: Best Management Practice: Cooling Tower Management on Facebook Tweet about Federal Energy Management Program: Best Management Practice: Cooling Tower Management on Twitter Bookmark Federal Energy Management Program: Best Management Practice: Cooling Tower Management on Google Bookmark Federal Energy Management Program: Best Management Practice: Cooling Tower Management on Delicious Rank Federal Energy Management Program: Best Management Practice: Cooling Tower Management on Digg Find More places to share Federal Energy Management Program: Best Management Practice: Cooling Tower Management on AddThis.com... Sustainable Buildings & Campuses Operations & Maintenance

117

Cooling Tower Report, October 2008 | Department of Energy  

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

2008 Electricity Reliability Impacts of a Mandatory Cooling Tower Rule for Existing Steam Generation Units Cooling Tower Report, October 2008 More Documents & Publications...

118

Wind, Thermal, and Earthquake Monitoring of the Watts Towers  

E-Print Network (OSTI)

C Solar heating will introduce stresses into the towersTower. The LACMA weather station records additional variables such as humidity and solar

English, Jackson

2013-01-01T23:59:59.000Z

119

BREN Tower comes tumbling down as world record is set | National Nuclear  

National Nuclear Security Administration (NNSA)

BREN Tower comes tumbling down as world record is set | National Nuclear BREN Tower comes tumbling down as world record is set | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > BREN Tower comes tumbling down as world ... BREN Tower comes tumbling down as world record is set Posted By Office of Public Affairs NNSA Blog Some 345 tons of steel came tumbling down yesterday as a world

120

BREN Tower comes tumbling down as world record is set | National Nuclear  

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

BREN Tower comes tumbling down as world record is set | National Nuclear BREN Tower comes tumbling down as world record is set | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > BREN Tower comes tumbling down as world ... BREN Tower comes tumbling down as world record is set Posted By Office of Public Affairs NNSA Blog Some 345 tons of steel came tumbling down yesterday as a world

Note: This page contains sample records for the topic "reflector power tower" 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

Microsoft Word - Final_NineCanyon_CommunicationTowerInstall_CX  

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

1, 2013 1, 2013 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Kelly Gardner, PMP Project Manager, TEP-TPP-1 Proposed Action: Nine Canyon Substation Communication Tower Addition: 331800 McNary Sub Bus Tie Relay Replacements and 310427 McNary-Badger Canyon Transfer Trip Install Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.6 - Additions and modifications to transmission facilities Location: Kennewick, Benton County, Washington Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to install a 60-foot communications tower and associated communication equipment at the Benton County Public Utility District's Nine Canyon Substation in Benton County, Washington. The upgrade would involve replacing the

122

Impact of HFIR LEU Conversion on Beryllium Reflector Degradation Factors  

SciTech Connect

An assessment of the impact of low enriched uranium (LEU) conversion on the factors that may cause the degradation of the beryllium reflector is performed for the High Flux Isotope Reactor (HFIR). The computational methods, models, and tools, comparisons with previous work, along with the results obtained are documented and discussed in this report. The report documents the results for the gas and neutronic poison production, and the heating in the beryllium reflector for both the highly enriched uranium (HEU) and LEU HFIR configurations, and discusses the impact that the conversion to LEU may have on these quantities. A time-averaging procedure was developed to calculate the isotopic (gas and poisons) production in reflector. The sensitivity of this approach to different approximations is gauged and documented. The results show that the gas is produced in the beryllium reflector at a total rate of 0.304 g/cycle for the HEU configuration; this rate increases by ~12% for the LEU case. The total tritium production rate in reflector is 0.098 g/cycle for the HEU core and approximately 11% higher for the LEU core. A significant increase (up to ~25%) in the neutronic poisons production in the reflector during the operation cycles is observed for the LEU core, compared to the HEU case, for regions close to the core s horizontal midplane. The poisoning level of the reflector may increase by more than two orders of magnitude during long periods of downtime. The heating rate in the reflector is estimated to be approximately 20% lower for the LEU core than for the HEU core. The decrease is due to a significantly lower contribution of the heating produced by the gamma radiation for the LEU core. Both the isotopic (gas and neutronic poisons) production and the heating rates are spatially non-uniform throughout the beryllium reflector volume. The maximum values typically occur in the removable reflector and close to the midplane.

Ilas, Dan [ORNL] ORNL

2013-10-01T23:59:59.000Z

123

Method of making reflecting film reflector  

DOE Patents (OSTI)

A reflector of the reflecting film type is disclosed and which may be used in a heliostatic system for concentrating solar energy and comprising a reflecting film bonded to an appropriate rigid substrate in such a way that specularity of a very high order is achieved. A method of bonding the reflecting film to the substrate is also disclosed and comprises the steps of initially adhering the film to a smooth, clean flat rigid surface with a non-bonding liquid between the rigid surface and film, and then bonding the substrate and film. The non-bonding liquid has a molecular adhesion greater than any stresses due to handling or curing of the bonding agent which is applied between the film and the opposing surface of the rigid substrate.

Cottingham, James G. (Center Moriches, NY)

1980-01-01T23:59:59.000Z

124

Best Management Practice: Cooling Tower Management | Department of Energy  

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

Best Management Practice: Cooling Tower Management Best Management Practice: Cooling Tower Management Best Management Practice: Cooling Tower Management October 8, 2013 - 9:39am Addthis Cooling towers regulate temperature by dissipating heat from recirculating water used to cool chillers, air-conditioning equipment, or other process equipment. Heat is rejected from the tower primarily through evaporation. Therefore, by design, cooling towers consume significant amounts of water. Overview The thermal efficiency and longevity of the cooling tower and equipment used to cool depend on the proper management of water recirculated through the tower. Water leaves a cooling tower system in any one of four ways: Evaporation: This is the primary function of the tower and is the method that transfers heat from the cooling tower system to the

125

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

DOE Patents (OSTI)

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

Horton, Richard H. (Schenectady, NY)

1980-01-01T23:59:59.000Z

126

New Reflector CFLs that Can Take the Heat  

SciTech Connect

Reflector compact fluorescent bulbs (R-CFLs) are a wise choice for the energy savvy because they offer energy savings of up to 66 percent compared to incandescent reflectors. But some R-CFLs have suffered performance problems (including premature failure) when used in high-temperature environments, such as recessed downlight fixtures located in insulated ceilings with airtight housings. To help address this issue, the U.S. Dept. of Energy (DOE) is working with lamp manufacturers to improve the quality and performance of screw-based reflector CFLs in high-heat applications.

Vogt, Susan

2005-03-01T23:59:59.000Z

127

Optimal sequencing of a cooling tower with multiple cells  

E-Print Network (OSTI)

This paper evaluates the energy savings potential of multi-cell cooling tower optimal sequencing control methods. Annual tower fan energy usage is calculated for a counter-flow tower with multiple variable-speed fans. Effectiveness-NTU tower model...

Zhang, Z.; Liu, J.

2012-01-01T23:59:59.000Z

128

Hydraulic Cooling Tower Driver- The Innovation  

E-Print Network (OSTI)

One of the weaknesses of present day cooling tower drives are fan wrecks caused by shaft couplings breaking, gear box malfunctions due to inadequate lubrication, gear tooth wear, and inaccessibility for inspection and routine maintenance. The hydro...

Dickerson, J. A.

129

Projective preservation : reframing Rudolph's Tower for Boston  

E-Print Network (OSTI)

By 2012, the fate of Paul Rudolph's tower in downtown Boston has been in question for years while a vision of a denser city calls for its demolition. Projected development on the site currently argues that to move forward, ...

Turner, Jessica K

2012-01-01T23:59:59.000Z

130

Cooling Towers--Energy Conservation Strategies  

E-Print Network (OSTI)

A cooling water system can be optimized by operating the cooling tower at the highest possible cycles of concentration without risking sealing and fouling of heat exchanger surfaces, tube bundles, refrigeration equipment, overhead condensers...

Matson, J.

131

Cooling Towers, The Neglected Energy Resource  

E-Print Network (OSTI)

Loving care is paid to the compressors, condensers, and computer programs of refrigeration systems. When problems arise, operator: run around in circles with expensive "fixes", but historically ignore the poor orphan, the cooling tower perched...

Burger, R.

1985-01-01T23:59:59.000Z

132

Advanced wet-dry cooling tower concept  

E-Print Network (OSTI)

The purpose of this years' work has been to test and analyze the new dry cooling tower surface previously developed. The model heat transfer test apparatus built last year has been instrumented for temperature, humidity ...

Snyder, Troxell Kimmel

133

Side Stream Filtration for Cooling Towers  

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

Report assesses side stream filtration options for cooling towers with an objective to assess key attributes that optimize energy and water savings and provide information about specific technology and implementation options.

134

Cooling Towers, The Neglected Energy Resource  

E-Print Network (OSTI)

COOLING TOWERS, THE NEGLECTED ENERGY RESOURCE ROBERT BURGER President, Burger Associates, Inc. Dallas, Texas (USA) Loving care is paid to the compress ors, condensers, and computer programs of refrigeration and air conditioning systems... is too hot, high temperature cut-outs occur and more energy must be provided to the motors to maintain the refrigeration cycle. COOLING TOWERS: 1) are just as important a link in the chain as the other equipment, 2) are an important source...

Burger, R.

135

An Advanced Computational Scheme for the Optimization of 2D Radial Reflectors in Pressurized Water Reactors  

E-Print Network (OSTI)

This paper presents a computational scheme for the determination of equivalent 2D multi-group heterogeneous reflectors in a Pressurized Water Reactor (PWR). The proposed strategy is to define a full-core calculation consistent with a reference lattice code calculation such as the Method Of Characteristics (MOC) as implemented in APOLLO2 lattice code. The computational scheme presented here relies on the data assimilation module known as "Assimilation de donn\\'{e}es et Aide \\`{a} l'Optimisation (ADAO)" of the SALOME platform developed at \\'{E}lectricit\\'{e} De France (EDF), coupled with the full-core code COCAGNE and with the lattice code APOLLO2. A first validation of the computational scheme is made using the OPTEX reflector model developed at \\'{E}cole Polytechnique de Montr\\'{e}al (EPM). As a result, we obtain 2D multi-group, spatially heterogeneous 2D reflectors, using both diffusion or $\\text{SP}_{\\text{N}}$ operators. We observe important improvements of the power discrepancies distribution over the cor...

Clerc, Thomas; Leroyer, Hadrien; Argaud, Jean-Philippe; Bouriquet, Bertrand; Ponot, Aglique

2014-01-01T23:59:59.000Z

136

Solar cell comprising a plasmonic back reflector and method therefor  

DOE Patents (OSTI)

A method for forming a solar cell having a plasmonic back reflector is disclosed. The method includes the formation of a nanoimprinted surface on which a metal electrode is conformally disposed. The surface structure of the nanoimprinted surface gives rise to a two-dimensional pattern of nanometer-scale features in the metal electrode enabling these features to collectively form the plasmonic back reflector.

Ding, I-Kang; Zhu, Jia; Cui, Yi; McGehee, Michael David

2014-11-25T23:59:59.000Z

137

Power with Heliostats  

Science Journals Connector (OSTI)

...the solar tower system-external...focus-ing heliostats, and methods of storage-are...preliminary design for a 10-megawatt...electric) pilot plant by June 1977...commercial solar plants into...Other solar tower developments...Electric Power Research...Albuquerque, New Mexico...Design of the Heliostat Field Because the...

Alvin F. Hildebrandt; Lorin L. Vant-Hull

1977-09-16T23:59:59.000Z

138

Sandia National Laboratories: Solar Tower  

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

Power, EC, Energy, National Solar Thermal Test Facility, News, Partnership, Renewable Energy, Solar On June 26 and 27, a series of exposures were made to multiple Boeing test...

139

Wind Turbine Towers Establish New Height Standards and Reduce Cost of Wind Energy  

Office of Energy Efficiency and Renewable Energy (EERE)

Case study that summarizes the Wind Tower Systems and its Space Frame tower. Describes their new wind tower design and explains how DOE funding made this possible.

140

Sandia National Laboratories: Concentrating Solar Power  

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

NASA's Solar Tower Test of the 1-Meter Aeroshell On August 23, 2012, in Concentrating Solar Power, Energy, Facilities, National Solar Thermal Test Facility, News, Partnership,...

Note: This page contains sample records for the topic "reflector power tower" 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

Radio Towers Geothermal Area | Open Energy Information  

Open Energy Info (EERE)

Radio Towers Geothermal Area Radio Towers Geothermal Area Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermal Resource Area: Radio Towers Geothermal Area Contents 1 Area Overview 2 History and Infrastructure 3 Regulatory and Environmental Issues 4 Exploration History 5 Well Field Description 6 Geology of the Area 7 Geofluid Geochemistry 8 NEPA-Related Analyses (0) 9 Exploration Activities (0) 10 References Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"TERRAIN","zoom":6,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"300px","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":43.03666667,"lon":-115.4566667,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

142

Sandia National Laboratories: Compact Linear Fesnel Reflector  

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

is collaborating with Sandia National Laboratories on a new concentrated solar power (CSP) installation with thermal energy storage. The CSP storage project combines Areva's...

143

Microsoft Word - CX-Marion and Sand Springs Substation Towers Revised.doc  

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

KEC-4 KEC-4 SUBJECT: Environmental Clearance Memorandum Dave Tripp Project Manager - TEP-CSB-1 Proposed Action: Marion and Sand Springs Substations Radio Tower Projects Budget Information: Work Orders 00243411 and 00243190; Task 3 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.19 Siting, construction, and operation of microwave and radio communication towers and associated facilities... Location: Marion and Deschutes counties, Oregon Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to install new radio towers at the Marion Substation and Sand Springs Substation communication sites in Oregon. BPA must vacate radio frequencies in the 1710-1755MHz band to comply with a Federal law mandating reallocation of

144

Microsoft Word - CX-SpringCreek-WineCountry-TowerRelocationFY13_WEB.doc  

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

November 29, 2012 November 29, 2012 REPLY TO ATTN OF: KEPR-4 SUBJECT: Environmental Clearance Memorandum Justin Estes Project Manager - TELM-TPP-3 Proposed Action: Spring Creek - Wine County No. 1 Transmission Tower Relocation Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.6 Additions and modifications to transmission facilities Location: Multnomah County, OR Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA is proposing to relocate one transmission tower, located on private agricultural land, which has been damaged by farm equipment. Currently, tower 29/3 on BPA's Spring Creek - Wine Country No. 1 transmission line, resides on an agricultural access road that is bordered on both sides by active agricultural fields. This

145

Broadwind Energy Formerly Tower Tech Holdings | Open Energy Information  

Open Energy Info (EERE)

Broadwind Energy Formerly Tower Tech Holdings Broadwind Energy Formerly Tower Tech Holdings Jump to: navigation, search Name Broadwind Energy (Formerly Tower Tech Holdings) Place Manitowoc, Wisconsin Zip 54221-1957 Sector Wind energy Product US-based manufacturer of wind turbine towers, turbine assemblies such as nacelles, and monopiles. References Broadwind Energy (Formerly Tower Tech Holdings)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Broadwind Energy (Formerly Tower Tech Holdings) is a company located in Manitowoc, Wisconsin . References ↑ "Broadwind Energy (Formerly Tower Tech Holdings)" Retrieved from "http://en.openei.org/w/index.php?title=Broadwind_Energy_Formerly_Tower_Tech_Holdings&oldid=343059"

146

Wind Turbine Towers Establish New Height Standards and Reduce...  

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

Wind Turbine Towers Establish New Height Standards and Reduce Cost of Wind Energy Wind Turbine Towers Establish New Height Standards and Reduce Cost of Wind Energy Case study that...

147

Vibration Control for Bridge Towers and Field Measurement  

Science Journals Connector (OSTI)

When the tower was under construction, there were some occasions to measure wind-induced response of the tower and also the performance of vibration control devices. Figure9.8...shows the observed relationship, ...

Yozo Fujino; Kichiro Kimura; Hiroshi Tanaka

2012-01-01T23:59:59.000Z

148

Best Management Practice #10: Cooling Tower Management | Department...  

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

Evaporation: This is the primary function of the tower and is the method that transfers heat from the cooling tower system to the environment. The quantity of evaporation is not...

149

Optimal Heliostat Layout for Concentrating Solar Tower Systems  

Science Journals Connector (OSTI)

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

Motoaki Utamura; Yutaka Tamaura

2007-01-01T23:59:59.000Z

150

Wind Turbine Towers Establish New Height Standards and Reduce Cost of Wind Energy  

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

Wind Tower Systems to develop the Wind Tower Systems to develop the Space Frame tower, a new concept for wind turbine towers. Instead of a solid steel tube, the Space Frame tower consists of a highly optimized design of five custom-shaped legs and interlaced steel struts. With this design, Space Frame towers can support turbines at greater heights, yet weigh and cost less than traditional steel tube towers. Wind Tower Systems LLC (now

151

Zoning for Small Wind: The Importance of Tower Height  

Wind Powering America (EERE)

1 1 Zoning for Small Wind: The Importance of Tower Height An ASES Small Wind Webinar Mick Sagrillo-Wisconsin's Focus on Energy © 2008 by Mick Sagrillo 2 Definitions: rotor L&S Tech. Assoc., Inc. Rotor = "collector" for a wind system 3 Definitions: wind * Wind = the 'fuel' * Wind has two 'components' - Quantity = wind speed (velocity or V) - Quality = 'clean' flowing wind 4 Quantity * = average annual wind speed * Climate, not weather * Akin to annual average sun hours for PV or head and flow for hydro * Wind speed increases with height above ground... * ...Due to diminished ground drag (friction) 5 Power in the wind V³ * Wind speed = V * Power available is proportional to wind speed x wind speed x wind speed - or P ~ V x V x V - or P ~ V ³ * Therefore, 10% V = 33% P * Lesson !

152

Cooling Towers--Energy Conservation Strategies Preservative Spray Treatment Maintains Cooling Tower  

E-Print Network (OSTI)

Several problems common to most industrial wood framed cooling towers can be easily controlled with annual preservative spray treatment applications to the plenum area framework and drift eliminators. It eliminates the expensive periodic repairs due...

Reidenback, R.

153

The design of solar chimney power plant for sustainable power generation.  

E-Print Network (OSTI)

??The solar chimney power plant (SCPP) also known as solar updraft tower is a nonconcentrating solar thermal technology, which employs both solar and wind energy (more)

Asante, David

2014-01-01T23:59:59.000Z

154

Dual annular rotating [open quotes]windowed[close quotes] 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. 4 figures.

Jacox, M.G.; Drexler, R.L.; Hunt, R.N.M.; Lake, J.A.

1994-03-29T23:59:59.000Z

155

MHD compressor---expander conversion system integrated with GCR inside a deployable reflector  

SciTech Connect

This work originates from the proposal MHD Compressor-Expander Conversion System Integrated with a GCR Inside a Deployable Reflector''. The proposal concerned an innovative concept of nuclear, closed-cycle MHD converter for power generation on space-based systems in the multi-megawatt range. The basic element of this converter is the Power Conversion Unit (PCU) consisting of a gas core reactor directly coupled to an MHD expansion channel. Integrated with the PCU, a deployable reflector provides reactivity control. The working fluid could be either uranium hexafluoride or a mixture of uranium hexafluoride and helium, added to enhance the heat transfer properties. The original Statement of Work, which concerned the whole conversion system, was subsequently redirected and focused on the basic mechanisms of neutronics, reactivity control, ionization and electrical conductivity in the PCU. Furthermore, the study was required to be inherently generic such that the study was required to be inherently generic such that the analysis an results can be applied to various nuclear reactor and/or MHD channel designs''.

Tuninetti, G. (Ansaldo S.p.A., Genoa (Italy). Research Div.); Botta, E.; Criscuolo, C.; Riscossa, P. (Ansaldo S.p.A., Genoa (Italy). Nuclear Div.); Giammanco, F. (Pisa Univ. (Italy). Dipt. di Fisica); Rosa-Clot, M. (Florence Univ. (Italy). Dipt. di Fisica)

1989-04-20T23:59:59.000Z

156

Coagulation chemistries for silica removal from cooling tower water.  

SciTech Connect

The formation of silica scale is a problem for thermoelectric power generating facilities, and this study investigated the potential for removal of silica by means of chemical coagulation from source water before it is subjected to mineral concentration in cooling towers. In Phase I, a screening of many typical as well as novel coagulants was carried out using concentrated cooling tower water, with and without flocculation aids, at concentrations typical for water purification with limited results. In Phase II, it was decided that treatment of source or make up water was more appropriate, and that higher dosing with coagulants delivered promising results. In fact, the less exotic coagulants proved to be more efficacious for reasons not yet fully determined. Some analysis was made of the molecular nature of the precipitated floc, which may aid in process improvements. In Phase III, more detailed study of process conditions for aluminum chloride coagulation was undertaken. Lime-soda water softening and the precipitation of magnesium hydroxide were shown to be too limited in terms of effectiveness, speed, and energy consumption to be considered further for the present application. In Phase IV, sodium aluminate emerged as an effective coagulant for silica, and the most attractive of those tested to date because of its availability, ease of use, and low requirement for additional chemicals. Some process optimization was performed for coagulant concentration and operational pH. It is concluded that silica coagulation with simple aluminum-based agents is effective, simple, and compatible with other industrial processes.

Nyman, May Devan; Altman, Susan Jeanne; Stewart, Tom

2010-02-01T23:59:59.000Z

157

STIFFENED SPRINGBACK REFLECTORS L.T. Tan and S. Pellegrino  

E-Print Network (OSTI)

STIFFENED SPRINGBACK REFLECTORS L.T. Tan and S. Pellegrino Department of Engineering, University plastic (CFRP). The whole structure is made as a single piece, without any expensive and potentially the reliability of the system. This paper proposes a modification of the original concept, based on the idea

Pellegrino, Sergio

158

Disordered animal multilayer reflectors and the localization of light  

Science Journals Connector (OSTI)

...the more weakly disordered guanine-cytoplasm...However, silvery protein structures around...system) are highly disordered and have sigma R...matrix models of protein-cytoplasm reflectors...stack model of a disordered animal multilayer...reflectivity spectrum of an ensemble (spatial) average...

2014-01-01T23:59:59.000Z

159

Control of the flux distribution on a solar tower receiver using an optimized aiming point strategy: Application to THEMIS solar tower  

Science Journals Connector (OSTI)

Abstract Life time of components is one of the technological bottle-necks in the development of solar tower power plant technology. The receiver, which is subjected to high and variable concentrated solar flux density is particularly affected: High, variable and non-homogeneous solar flux on the solar receiver walls results in strong stresses because of high temperatures, thermal shocks and temperature gradient that contribute to the reduction of the life time of this key component. This work aims to present an open loop approach to control the flux density distribution delivered on a flat plate receiver for a solar power tower. Various distributions of aiming points on the aperture of the receiver are considered. The flux density distribution on the aperture is simulated by a computer code. A specific neighborhood is defined for the TABU optimization meta-heuristic according to the size of the image of each individual heliostat. This modified algorithm is implemented to select the best aiming point for each heliostat. This approach has been validated using the example of THEMIS solar power tower in Targasonne, France.

Adrien Salom; Fabien Chhel; Gilles Flamant; Alain Ferrire; Frederik Thiery

2013-01-01T23:59:59.000Z

160

Single-mode, narrow-linewidth external cavity quantum cascade laser through optical feedback from a partial-reflector  

SciTech Connect

An external-cavity (EC) quantum cascade (QC) laser using optical feedback from a partial-reflector is reported. With this configuration, the otherwise multi-mode emission of a Fabry-Perot QC laser was made single-mode with optical output powers exceeding 40 mW. A mode-hop free tuning range of 2.46 cm-1 was achieved by synchronously tuning the EC length and QC laser current. The linewidth of the partial-reflector EC-QC laser was measured for integration times from 100 ?s to 4 s, and compared to a distributed feedback QC laser. Linewidths as small as 480 kHz were recorded for the EC-QC laser

Cendejas, Richard A.; Phillips, Mark C.; Myers, Tanya L.; Taubman, Matthew S.

2010-11-30T23:59:59.000Z

Note: This page contains sample records for the topic "reflector power tower" 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

Side Stream Filtration for Cooling Towers  

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

Side Stream Filtration Side Stream Filtration for Cooling Towers Prepared for the U.S. Department of Energy Federal Energy Management Program By Pacific Northwest National Laboratory X. Duan, J.L. Williamson, K.L McMordie Stoughton and B.K. Boyd October 2012 FEDERAL ENERGY MANAGEMENT PROGRAM i Contact Will Lintner, PE Federal Energy Management Program U.S. Department of Energy 1000 Independence Ave. SW Washington, DC 20585-0121 Phone: (202) 586-3120 E-mail: william.lintner@ee.doe.gov Cover photo: Cooling Towers. Photo from Pacific Northwest National Laboratory ii Acknowledgements The authors of the report would like to thank the following individuals that provided support to

162

Fuel Cells for Backup Power in Telecommunications Facilities (Fact Sheet)  

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

Telecommunications providers rely on backup power to maintain a constant power supply, to prevent power outages, and to ensure the operability of cell towers, equipment, and networks. The backup power supply that best meets these objectives is fuel cell technology.

163

Fuel Cells for Backup Power in Telecommunications Facilities (Fact Sheet)  

SciTech Connect

Telecommunications providers rely on backup power to maintain a constant power supply, to prevent power outages, and to ensure the operability of cell towers, equipment, and networks. The backup power supply that best meets these objectives is fuel cell technology.

Not Available

2009-04-01T23:59:59.000Z

164

Energy 101: Concentrating Solar Power | Department of Energy  

Energy Savers (EERE)

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

165

Oak Ridge's EM Program Demolishes North America's Tallest Water Tower |  

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

Demolishes North America's Tallest Water Demolishes North America's Tallest Water Tower Oak Ridge's EM Program Demolishes North America's Tallest Water Tower August 27, 2013 - 12:00pm Addthis Oak Ridge’s K-1206 F Fire Water Tower falls into an empty field during a recent demolition project. Oak Ridge's K-1206 F Fire Water Tower falls into an empty field during a recent demolition project. OAK RIDGE, Tenn. - Oak Ridge's EM program recently demolished one of the most iconic structures at the East Tennessee Technology Park (ETTP). The 382-foot checkerboard water tower - the tallest in North America - dominated the site's skyline since its construction in 1958. The K-1206 F Fire Water Tower operated as part of the site's fire protection system, but it was drained, disconnected and permanently taken

166

Competitive Landscape of Mobile Telecommunications Tower Companies in India  

Science Journals Connector (OSTI)

With the entry of 3G and WiMAX players, the Indian mobile subscriber base is expected to reach 1110 million by the end of 2015. To meet mobile infrastructure demand, India will require approximately 350,000 to 400,000 mobile telecommunications towers ... Keywords: Business Models, Infrastructure Sharing, Joint Venture Companies, Mobile Network Operators MNO, Mobile Telecommunication Tower Valuation, Mobile Telecommunications Towers, Telecommunication Circles

N.P. Singh

2010-01-01T23:59:59.000Z

167

Upcoming Funding Opportunity for Tower Manufacturing and Installation...  

Office of Environmental Management (EM)

systems with hub heights of at least 120 meters. Scaling to taller towers allows wind turbines to capture less turbulent and often stronger wind resources, thereby increasing...

168

Upcoming Funding Opportunity for Tower Manufacturing and Installation...  

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

and logistics constraints affecting the deployment of taller utility-scale wind turbine systems with hub heights of at least 120 meters. Scaling to taller towers allows wind...

169

Concentrating Solar Power Commercial Application Study  

E-Print Network (OSTI)

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

Laughlin, Robert B.

170

Microsoft Word - CX-Pearl-Marion-Tower-6-2-Replace_FY12_WEB.doc  

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

3, 2012 3, 2012 REPLY TO ATTN OF: KEPR-4 SUBJECT: Environmental Clearance Memorandum Richard Heredia Project Manager - TEP-TPP-1 Proposed Action: Pearl-Marion No.1 Tower 6/2 replacement project PP&A Project No.: PP&A 2147, WO# 00296634, Task 3 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.6 Additions and modifications to transmission facilities Location: Canby, Clackamas County, Oregon Township 3 South, Range 1 East, Section 19 Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to replace a single tower (6/2) on the existing Pearl-Marion No. 1 500-kilovolt (kV) transmission line. Tower 6/2 is located along the Molalla River where natural river channel movement and continued stream bank erosion

171

Data Center Economizer Cooling with Tower Water; Demonstration of a  

E-Print Network (OSTI)

exchanger was configured to use higher temperature water produced by a cooling tower alone. The other coilLBNL-6660E Data Center Economizer Cooling with Tower Water; Demonstration of a Dual Heat Exchanger-temperature cooling water, so that it can support many more hours of free cooling compared to traditional systems

172

A Review of the Reflector Compact Fluorescent Lights Technology Procurement Program: Conclusions and Results  

SciTech Connect

This report describes a project sponsored by the U.S. Department of Energy (DOE) and implemented by the Pacific Northwest National Laboratory (PNNL), from 2000 to 2007 to improve the performance of reflector type (R-lamp) compact fluorescent lamps (CFLs) and increase their availability throughout the United States by means of a technology development and procurement strategy. In 2000, at the request of the U.S. Department of Energys Emerging Technologies Program and its predecessors, the Pacific Northwest National Laboratory undertook a technology procurement seeking R-CFLs that were specifically designed for use in ICAT recessed can fixtures and that met other minimum performance criteria including minimum light output and size restrictions (to ensure they fit in standard residential recessed cans). The technology procurement included two phases. In Phase I, requests for proposals (RFPs) were issued in October 2002 and five manufacturers responded with 12 lamp models. Eight of these models met the minimum requirements and passed the 6-hour short-term test in a simulated ICAT environment. These eight models were subjected to long-term tests of 6,000 or more hours in a simulated ICAT environment. Three of these models passed the short- and long-term tests and were promoted through the program website (www.pnl.gov/rlamps), press releases, and fliers. To increase the number of qualifying models, a second RFP was issued in June 2005. In April 2007, DOE announced that 16 reflector CFL (R-CFL) models by four manufacturers had met all the minimum requirements of Phase 2 of the R-CFL Technology Innovation Competition. PNNL developed both the criteria and the test apparatus design for Elevated Temperature Life Testing (ETLT), which has been included by DOE in its draft ENERGY STAR specifications for the reflector category of CFLs. PNNL promoted the winning lamps through a program website, press releases, and fliers as well as through program partners. PNNL also helped engage distributors including Costco, the Home Depot, Bonneville Power Administration, and utility organizations.

Sandahl, Linda J.; Gilbride, Theresa L.; Ledbetter, Marc R.; McCullough, Jeffrey J.

2008-05-19T23:59:59.000Z

173

Cooling Towers: Understanding Key Components of Cooling Towers and How to Improve Water Efficiency  

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

Paul Johnston-Knight Introduction Federal laws and regulations require Federal agencies to reduce water use and improve water efficiency. Namely, Executive Order 13514 Federal Leadership in Environmental, Energy, and Economic Performance, requires an annual two percent reduction of water use intensity (water use per square foot of building space) for agency potable water consumption as well as a two percent reduction of water use for industrial, landscaping, and agricultural applica- tions. Cooling towers can be a significant

174

Design constraints on Cherenkov telescopes with Davies-Cotton reflectors  

E-Print Network (OSTI)

This paper discusses the construction of high-performance ground-based gamma-ray Cherenkov telescopes with a Davies-Cotton reflector. For the design of such telescopes, usually physics constrains the field-of-view, while the photo-sensor size is defined by limited options. Including the effect of light-concentrators in front of the photo sensor, it is demonstrated that these constraints are enough to mutually constrain all other design parameters. The dependability of the various design parameters naturally arises once a relationship between the value of the point-spread functions at the edge of the field-of-view and the pixel field-of-view is introduced. To be able to include this constraint into a system of equations, an analytical description for the point-spread function of a tessellated Davies-Cotton reflector is derived from Taylor developments and ray-tracing simulations. Including higher order terms renders the result precise on the percent level. Design curves are provided within the typical phase sp...

Bretz, Thomas

2013-01-01T23:59:59.000Z

175

Temperature and thermal stress distributions for the HFIR permanent reflector generated by nuclear heating  

SciTech Connect

The beryllium permanent reflector of the High Flux Isotope Reactor has the main functions for slowing down and reflecting the neutrons and housing the experimental facilities. The reflector is heated as a result of the nuclear reaction. Heat is removed mainly by the cooling water passing through the densely distributed coolant holes along the vertical or axial direction of the reflector. The reflector neutronic distribution and its heating rate are calculated by J.C. Gehin of the Oak Ridge National Laboratory by applying the Monte Carlo Code MCNP. The heat transfer boundary conditions along several reflector interfaces are estimated to remove additional heat from the reflector. The present paper is to report the calculation results of the temperature and the thermal stress distributions of the permanent reflector by applying the computer aided design code I-DEAS and the finite element code ABAQUS. The present calculation is to estimate the high stress areas as a result of the new beam tube cutouts along the horizontal mid-plane of the reflector of the recent reactor upgrade project. These high stresses were not able to be calculated in the preliminary design analysis in earlier 60`s. The heat transfer boundary conditions are used in this redesigned calculation. The material constants and the acceptance criteria for the allowable stresses are mainly based on that assumed in the preliminary design report.

Chang, S.J.

1998-04-01T23:59:59.000Z

176

DISSERTATION ELECTRON-REFLECTOR STRATEGY FOR CdTe THIN-FILM SOLAR CELLS  

E-Print Network (OSTI)

DISSERTATION ELECTRON-REFLECTOR STRATEGY FOR CdTe THIN-FILM SOLAR CELLS Submitted by Kuo-Jui Hsiao ELECTRON- REFLECTOR STRATEGY FOR CdTe THIN-FILM SOLAR CELLS BE ACCEPTED AS FULFILLING IN PART REQUIREMENTS SOLAR CELLS The CdTe thin-film solar cell has a large absorption coefficient and high theoretical

Sites, James R.

177

Reflector for efficient coupling of a laser beam to air or other fluids  

DOE Patents (OSTI)

A reflector array is disclosed herein that provides a controlled region or regions of plasma breakdowns from a laser beam produced at a remotely-based laser source. The plasma may be applied to produce thrust to propel a spacecraft, or to diagnose a laser beam, or to produce shockwaves. The spacecraft propulsion system comprises a reflector array attached to the vehicle. The reflector array comprises a plurality of reflectors spaced apart on a reflective surface, with each reflector acting as an independent focusing mirror. The reflectors are spaced closely together to form a continuous or partially-continuous surface. The reflector array may be formed from a sheet of reflective material, such as copper or aluminum. In operation, a beam of electromagnetic energy, such as a laser beam, is directed at the reflectors which focus the reflected electromagnetic energy at a plurality of regions off the surface. The energy concentrated in the focal region causes a breakdown of the air or other fluid in the focal region, creating a plasma. Electromagnetic energy is absorbed in the plasma and it grows in volume, compressing and heating the adjacent fluid thereby providing thrust. Laser pulses may be applied repetitively. After each such thrust pulse, fresh air can be introduced next to the surface either laterally, or through a perforated surface. If air or some other gas or vapor is supplied, for example from a tank carried on board a vehicle, this invention may also be used to provide thrust in a vacuum environment.

Kare, Jordin T. (Pleasanton, CA)

1992-01-01T23:59:59.000Z

178

Reflector for efficient coupling of a laser beam to air or other fluids  

DOE Patents (OSTI)

A reflector array is disclosed herein that provides a controlled region or regions of plasma breakdowns from a laser beam produced at a remotely-based laser source. The plasma may be applied to produce thrust to propel a spacecraft, or to diagnose a laser beam, or to produce shock waves. The spacecraft propulsion system comprises a reflector array attached to the vehicle. The reflector array comprises a plurality of reflectors spaced apart on a reflective surface, with each reflector acting as an independent focusing mirror. The reflectors are spaced closely together to form a continuous or partially-continuous surface. The reflector array may be formed from a sheet of reflective material, such as copper or aluminum. In operation, a beam of electromagnetic energy, such as a laser beam, is directed at the reflectors which focus the reflected electromagnetic energy at a plurality of regions off the surface. The energy concentrated in the focal region causes a breakdown of the air or other fluid in the focal region, creating a plasma. Electromagnetic energy is absorbed in the plasma and it grows in volume, compressing and heating the adjacent fluid thereby providing thrust. Laser pulses may be applied repetitively. After each such thrust pulse, fresh air can be introduced next to the surface either laterally, or through a perforated surface. If air or some other gas or vapor is supplied, for example from a tank carried on board a vehicle, this invention may also be used to provide thrust in a vacuum environment. 10 figs.

Kare, J.T.

1992-10-06T23:59:59.000Z

179

NREL National Wind Technology Center (NWTC): M2 Tower; Boulder, Colorado (Data)  

DOE Data Explorer (OSTI)

The National Wind Technology Center (NWTC), located at the foot of the Rocky Mountains near Boulder, Colorado, is a world-class research facility managed by NREL for the U.S. Department of Energy. NWTC researchers work with members of the wind energy industry to advance wind power technologies that lower the cost of wind energy through research and development of state-of-the-art wind turbine designs. NREL's Measurement and Instrument Data Center provides data from NWTC's M2 tower which are derived from instruments mounted on or near an 82 meter (270 foot) meteorological tower located at the western edge of the NWTC site and about 11 km (7 miles) west of Broomfield, and approximately 8 km (5 miles) south of Boulder, Colorado. The data represent the mean value of readings taken every two seconds and averaged over one minute. The wind speed and direction are measured at six heights on the tower and air temperature is measured at three heights. The dew point temperature, relative humidity, barometric pressure, totalized liquid precipitation, and global solar radiation are also available.

Jager, D.; Andreas, A.

180

Quenching China's Thirst for Renewable Power: Water Implications of China's Renewable Development  

E-Print Network (OSTI)

tower plant in China. Renewable and Sustainable Energyby plant in Guangxi. Renewable and Sustainable EnergyChinas Thirst for Renewable Power: Water Implications of

Zheng, Nina

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "reflector power tower" 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

A Global Optimization Approach to the Design of Solar Power Plants  

E-Print Network (OSTI)

Apr 1, 2014 ... Abstract: A method for optimizing a Solar Power Tower system is proposed, in which both the location of the heliostats and the characteristics of...

E. Carrizosa

2014-04-01T23:59:59.000Z

182

A Global Optimization Approach to the Design of Solar Power Plants  

E-Print Network (OSTI)

May 8, 2014 ... A method for optimizing a Solar Power Tower system is proposed, ... at a high temperature is then transferred to the heat transfer fluid to...

2014-05-08T23:59:59.000Z

183

Advanced Manufacture of Second-Surface, Silvered Glass Reflectors for High-Performance, Low-Cost CSP Collector Systems  

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

Advanced Manufacture of Second-Surface, Silvered Glass Reflectors for High-Performance, Low-Cost CSP Collector Systems

184

Proposed Transmission Towers Proposed New Substation Sites Proposed...  

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

6-1E: Recreation Inset Maps for Map 6-1C and Map 6-1D Proposed Transmission Towers Proposed New Substation Sites Proposed Route Segments (not drawn to scale) New Access Roads...

185

About the Design & Construction Collaborative Life Sciences Building & Skourtes Tower  

E-Print Network (OSTI)

About the Design & Construction Collaborative Life Sciences Building & Skourtes Tower With an emphasis on connection, the inter-disciplinary, multi-institutional building's design reflects its. Anticipating LEED Platinum rating, the building incorporated sustainable construction practices, including div

Chapman, Michael S.

186

Energy Efficiency Evaluation of Guangzhou West Tower Faade System  

E-Print Network (OSTI)

Guangzhou West Tower is an extremely tall public building. The energy efficiency evaluation of its faade should be different than that of ordinary public buildings. Based on the national code GB50189-2005, Design Standard for Energy efficiency...

Meng, Q.; Zhang, L.

2006-01-01T23:59:59.000Z

187

Cooling Towers - Energy Conservation and Money Making Mechanisms  

E-Print Network (OSTI)

The utilization of colder water conserves energy, creates profits, increases product output. In an effort to obtain greater efficiencies and conserve both energy and dollars, all too many engineers neglect the potential of the cooling tower. Many...

Burger, R.

1981-01-01T23:59:59.000Z

188

On towers of function fields of Artin-Schreier type  

Science Journals Connector (OSTI)

In this article we derive strong conditions on the defining equations of asymptotically good Artin-Schreier towers. We will show that at most three kinds of defining equations can give rise to a recursively de...

Peter Beelen; Arnaldo Garcia 1; 2

2004-07-01T23:59:59.000Z

189

Dynamics and optimal control of flexible solar updraft towers  

Science Journals Connector (OSTI)

...control of flexible solar updraft towers...University of New Mexico, , Albuquerque...USA The use of solar chimneys for energy production was...a) Potential energy as a function of...University of New Mexico solar chimney prototype...

2015-01-01T23:59:59.000Z

190

Workers Safely Tear Down Towers at Manhattan Project Site | Department...  

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

uncontaminated and in a non-posted area. Addthis Related Articles Oak Ridge's K-1206 F Fire Water Tower falls into an empty field during a recent demolition project. Oak Ridge's...

191

2010sr27[cooling_tower_complete].doc  

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

Friday, September 17, 2010 Friday, September 17, 2010 james-r.giusti@srs.gov Paivi Nettamo, SRNS, (803) 952-6938 paivi.nettamo@srs.gov K Cooling Tower Project Reaches Completion Aiken, S.C. - One of the most visual milestones of cleanup projects underway within the Department of Energy's Office of Environmental Management was the demolition of the K-Reactor Cooling Tower at the Savannah River Site (SRS). Now, this American Recovery and Reinvestment Act project has been

192

Parametric study and dynamic analysis of compliant piled towers  

E-Print Network (OSTI)

PARAMETRIC STUDY AND DYNAMIC ANALYSIS OF COMPLIANT PILED TOWERS A Thesis by KARL HEINZ MOOG Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree ol' MASTER OF SCIENCE... May f990 Major Subject: Ocean Engineering PARAMETRIC STUDY AND DYNAMIC ANALYSIS OF COMPLIANT PILED TOWERS A Thesis by KARL HEINZ MOOG Approved as to style and content by: Jack Lou (Chair of Committee) Ala. n slazzolo (Member) Robert Randall...

Moog, Karl Heinz

2012-06-07T23:59:59.000Z

193

Rebuilding the Tower of Babel: An introduction to freshman composition  

E-Print Network (OSTI)

REBUILDING THE TOWER OF BABEL: AN INTRODUCTION TO FRESHMAN COMPOSITION A Thesis by KAREN DAVIS Submitted to the Graduate College of Texas ABM University in partial fulfillment of the requirement for the degree of MASTER OF ARTS May 1978... Major Subject: English REBUILDING THE TOWER OF BABEL: AN INTRODUCTION TO FRESHMAN COMPOSITION A Thesis by KAREN DAVIS Approved as to style and content by: (Chairman of Committee) Head of Department) 7 i +i~ Mem er) (Member) May 1978 ABSTRACT...

Davis, Karen

2012-06-07T23:59:59.000Z

194

American Tower Company | Open Energy Information  

Open Energy Info (EERE)

Company Company Jump to: navigation, search Name American Tower Company Address P.O. Box 29 Place Shelby, Ohio Zip 44875 Sector Wind energy Product Agriculture;Business and legal services; Energy audits/weatherization; Engineering/architectural/design; Manufacturing; Retail product sales and distribution Phone number 419-347-1185 Website http://www.amertower.com Coordinates 40.8814452°, -82.6618424° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.8814452,"lon":-82.6618424,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

195

Researching power plant water recovery  

SciTech Connect

A range of projects supported by NETl under the Innovations for Existing Plant Program are investigating modifications to power plant cooling systems for reducing water loss, and recovering water from the flue gas and the cooling tower. This paper discusses two technologies showing particular promise condense water that is typically lost to evaporation, SPX technologies' Air2Air{sup trademark} condenses water from a cooling tower, while Lehigh University's process condenses water and acid in flue gas. 3 figs.

NONE

2008-04-01T23:59:59.000Z

196

Preparation of nuclear libraries with deterministic and stochastic methods for LWR reflectors  

SciTech Connect

The explicit reflector methodology is used in the system of codes CASMO-5 / SIMULATE-3 to include the reflector around the active core into the computational region and avoid adopting any ad-hoc or experimental albedo coefficients as boundary conditions. However, to complete the core calculation, a set of cross sections and discontinuity factors is needed for the reflector nodes and the accuracy of these nuclear parameters influences the final results, in particular along the peripheral regions of the core. In this paper the explicit reflector methodology of CASMO-5 is adopted to evaluate the few-group cross sections and discontinuity factors of the different reflector cases, based on the design of Generation II and III LWR reactors. In addition, in the perspective of using Monte-Carlo codes as a complementary option for lattice calculations of reflector configurations, the stochastic SERPENT code is also included as part of this benchmark. With the latter, the impact of applying 2-D reflector models with homogenized materials instead of explicit representation of the real geometrical structures is moreover evaluated and shown to be limited. (authors)

Canepa, S.; Hursin, M.; Ferroukhi, H.; Pautz, A. [Paul Scherrer Institut PSI, 5232, Villigen PSI (Switzerland)

2013-07-01T23:59:59.000Z

197

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network (OSTI)

Cecil. E. A. , Research on Dry-Type Cooling _T_o_w_e_r~s~f~oTower Type Wet-Cooled Power Plant Solar-Power Plant Dry-Cool

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

198

Sandia National Laboratories: Concentrating Solar Power (CSP...  

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

of three 459-ft-tall power towers and over 170,000 reflective heliostats with a rated capacity of 390 MW. The California Energy Commission (CEC) has received numerous pilot and air...

199

Sandia National Laboratories: Concentrating Solar Power  

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

Dishes Chuck Andraka | Phone: 505-844-8573 Dr. Julius Yellowhair | Phone: 505-844-3029 Power Tower Component DesignModeling Josh Christian | Phone: 505-284-5190 Dr. Ryan ......

200

Effect of non-uniform slow wave structure in a relativistic backward wave oscillator with a resonant reflector  

SciTech Connect

This paper provides a fresh insight into the effect of non-uniform slow wave structure (SWS) used in a relativistic backward wave oscillator (RBWO) with a resonant reflector. Compared with the uniform SWS, the reflection coefficient of the non-uniform SWS is higher, leading to a lower modulating electric field in the resonant reflector and a larger distance to maximize the modulation current. Moreover, for both types of RBWOs, stronger standing-wave field takes place at the rear part of the SWS. In addition, besides Cerenkov effects, the energy conversion process in the RBWO strongly depends on transit time effects. Thus, the matching condition between the distributions of harmonic current and standing wave field provides a profound influence on the beam-wave interaction. In the non-uniform RBWO, the region with a stronger standing wave field corresponds to a higher fundamental harmonic current distribution. Particle-in-cell simulations show that with a diode voltage of 1.02 MV and beam current of 13.2 kA, a microwave power of 4 GW has been obtained, compared to that of 3 GW in the uniform RBWO.

Chen, Changhua; Xiao, Renzhen; Sun, Jun; Song, Zhimin; Huo, Shaofei; Bai, Xianchen; Shi, Yanchao; Liu, Guozhi [Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an 710024 (China)] [Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an 710024 (China)

2013-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "reflector power tower" 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

Angle-tuned, evanescently-decoupled reflector for high-efficiency red light-emitting diode  

Science Journals Connector (OSTI)

We propose and demonstrate evanescently-decoupled, solid-angle-optimized distributed Bragg reflectors (DBRs) for AlGaInP light-emitting diodes (LEDs). The thickness of each DBR layer...

Kim, Sun-Kyung; Cho, Hyun K; Park, Kyung K; Jang, Junho; Lee, Jeong S; Park, Kyung W; Park, Youngho; Kim, Ju-Young; Lee, Yong-Hee

2008-01-01T23:59:59.000Z

202

Widely-tunable femtosecond operation of Cr:LiSAF lasers using broadband saturable bragg reflectors  

E-Print Network (OSTI)

We describe a low-cost diode-pumped Cr:LiSAF laser, mode-locked using a broadband saturable Bragg reflector. The laser produces continuously tunable sub-200-fs pulses from 800 nm to 905 nm.

Demirbas, Umit

203

Performance Study of Thermoelectric Solar-Assisted Heat Pump with Reflectors  

Science Journals Connector (OSTI)

The simultaneous conversion of solar radiation into thermal and electrical energy in a thermoelectric (TE) solar-assisted heat pump is, for the purposes of ... plate reflectors have been mounted on a TE solar col...

C. Lertsatitthanakorn; S. Soponronnarit

2014-06-01T23:59:59.000Z

204

Impact of strongly absorbing experiments in the HFIR reflector on control plate strength  

SciTech Connect

Several improvements in the experimental irradiation facilities of the High-Flux Isotope Reactor (HFIR) were incorporated at the time of its restart in 1989 in order to enhance its capabilities for materials irradiations. One improvement that is of particular interest in regard to its impact on the reactor`s nuclear characteristics is the increase in number and size of the larger irradiation holes in the HFIR`s removable beryllium reflector (RB). A principal use for these larger-diameter holes has been to accommodate spectrally tailored materials irradiations where fast neutron reactions are of principal interest and the suppression of thermal neutron reactions is important to the interpretation of the results. Such experiments typically require thermal neutron-absorbing shrouds around the experimental capsules. Reactor operation with strong thermal neutron absorbers directly outboard of the control elements has significant impact on core power distribution, cycle length, control rod worths, and on other experimental facilities nearby. This paper specifically discusses the impacts on control rod strength due to the strong localized thermal neutron absorbers.

Rothrock, R.B. [Oak Ridge National Lab., TN (United States)

1998-09-01T23:59:59.000Z

205

Photodetector with absorbing region having resonant periodic absorption between reflectors  

DOE Patents (OSTI)

A photodetector is disclosed that is responsive to a wavelength or wavelengths of interest which have heretofore been unrealized. The photodetector includes a resonant cavity structure bounded by first and second reflectors, the resonant cavity structure being resonant at the wavelength or wavelengths of interest for containing a plurality of standing waves therein. The photodetector further includes a radiation absorbing region disposed within the resonant cavity structure, the radiation absorbing region including a plurality of radiation absorbing layers spaced apart from one another by a distance substantially equal to a distance between antinodes of adjacent ones of the standing waves. Each of radiation absorbing layers is spatially positioned at a location of one of the antinodes of one of the standing waves such that radiation absorption is enhanced. The radiation absorbing layers may be either bulk layers or quantum wells includes a plurality of layers, each of which is comprised of a strained layer of InGaAs. Individual ones of the InGaAs layers are spaced apart from one another by a GaAs barrier layer. 11 figs.

Bryan, R.P.; Olbright, G.R.; Brennan, T.M.; Tsao, J.Y.

1995-02-14T23:59:59.000Z

206

Solar Power  

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

Solar Power Solar Power Project Opportunities Abound in the Region The WIPP site is receives abundant solar energy with 6-7 kWh/sq meter power production potential As the accompanying map of New Mexico shows, the WIPP site enjoys abundant year-round sunshine. With an average solar power production potential of 6-7 kWh/sq meter per day, one exciting project being studied for location at WIPP is a 30-50 MW Solar Power Tower: The American Solar Energy Society (ASES) is is a national trade association promoting solar energy as a clean source of electricity, and provides a comprehensive resource for additional information. DOE's Office of Energy Efficiency and Renewable Energy is also a comprehensive resource for more information on renewable energy.

207

Technical Evaluation of Side Stream Filtration for Cooling Towers  

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

Cooling Towers (photo from Pacific Cooling Towers (photo from Pacific Northwest National Laboratory) * Scaling: Scaling is the precipitation of dissolved mineral components that have become saturated in solution, which can lower efficiency of the system. * Fouling: Fouling occurs when suspended particles or biologic growth forms an insulating film on heat transfer surfaces. Common foulants include organic matter, process oils, and silt, which can also lower system performance. * Microbiological Activity: Microbiological activity refers to microorganisms that live and grow in the cooling system that can contribute

208

Technical Evaluation of Side Stream Filtration for Cooling Towers  

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

Cooling Towers (photo from Pacific Cooling Towers (photo from Pacific Northwest National Laboratory) * Scaling: Scaling is the precipitation of dissolved mineral components that have become saturated in solution, which can lower efficiency of the system. * Fouling: Fouling occurs when suspended particles or biologic growth forms an insulating film on heat transfer surfaces. Common foulants include organic matter, process oils, and silt, which can also lower system performance. * Microbiological Activity: Microbiological activity refers to microorganisms that live and grow in the cooling system that can contribute

209

Automatically controlled wind propeller and tower shadow eliminator  

SciTech Connect

A propeller hub carries pivotally-mounted blades that are linked to a spring-loaded collar on the propeller shaft for automatic coning and feathering under predetermined high velocity movement along the propeller shaft to change the blade pitch angle during low wind velocity conditions. An airfoil support mounts a propeller shaft and turns therewith to reduce tower shadow effects. This is called a ''down-wind system'' meaning the propeller is behind the tower and causes the assembly to rotate into the wind without a tail vane.

Randolph, A.J.

1982-01-12T23:59:59.000Z

210

A test section for evaluating cooling tower components  

E-Print Network (OSTI)

be- ing, used i'or the evaluation of various t;, . pss of cooling tower packing. The mater measuring and heating equipnent hsvs been used in ths testing of two small cmneroial cooling tcsrers. 37 C~WP18FR STATIC PREDStlRE -/g. g~g 1 fry v t t... be- ing, used i'or the evaluation of various t;, . pss of cooling tower packing. The mater measuring and heating equipnent hsvs been used in ths testing of two small cmneroial cooling tcsrers. 37 C~WP18FR STATIC PREDStlRE -/g. g~g 1 fry v t t...

Alter, Alan Brian

2012-06-07T23:59:59.000Z

211

Tower of Hanoi Most of the following paragraphs were copied from wikipedia [I]. Pictures were bor-  

E-Print Network (OSTI)

/shopping/item-img/tower-of -hanoi-01.jpg [3] http ://www .mactech.com/articles/mactech/Vol .02/02.01/Towers/img002.gif For applets

Lalín, Matilde

212

SHM BASED SYSTEM DESIGN OFA WIND TURBINE TOWER USING A MODAL SENSITIVITY BASED BAYES DETECTOR  

E-Print Network (OSTI)

SHM BASED SYSTEM DESIGN OFA WIND TURBINE TOWER USING A MODAL SENSITIVITY BASED BAYES DETECTOR Mads of the NREL 5MW wind turbine tower subjected to bending fatigue and horizontal circumferential cracking

Boyer, Edmond

213

The Parameter Optimization and Analysis of a Multi-Stage Tower Type of Solar Desalination Unit  

Science Journals Connector (OSTI)

After the analysis of the multi-stage tower type of solar desalination unit[1], the unit is optimized...

Chen Ziqian; He Kaiyan; Zheng Hongfei

2009-01-01T23:59:59.000Z

214

Optimal design of a dry-type natural-draft cooling tower by geometric programming  

Science Journals Connector (OSTI)

In this paper, the optimal design of dry-type natural-draft cooling towers is investigated. Using...

J. G. Ecker; R. D. Wiebking

1978-10-01T23:59:59.000Z

215

Optimal Design of a Dry-Type Natural-Draft Cooling Tower by Geometric Programming  

Science Journals Connector (OSTI)

In this paper, the optimal design of dry-type natural-draft cooling towers is investigated. Using...

J. G. Ecker; R. D. Wiebking

1980-01-01T23:59:59.000Z

216

Ilchmann, Achim; Pahl, M. : Adaptive Multivariable pH Regulation of a Biogas Tower Reactor  

E-Print Network (OSTI)

Ilchmann, Achim; Pahl, M. : Adaptive Multivariable pH Regulation of a Biogas Tower Reactor Zuerst. The adaptive controller was successlullytesteclover il pcriod of tu'o nonths at a biogas tower reuetoriu pilot are not applicable to the biogas tower reüctor.since a dontinatingf-eatureof the new reactol' prir-rciplc-is its

Knobloch,Jürgen

217

THE TOWER FOUNDATION OF SAN JOSE STATE UNIVERSITY Procurement Card Application  

E-Print Network (OSTI)

THE TOWER FOUNDATION OF SAN JOSE STATE UNIVERSITY Procurement Card Application CARDHOLDER card is lost or stolen, I will notify the Tower Foundation immediately. I will surrender my Procurement Card to Tower Foundation upon termination of employment or upon reallocation of duties which do

Eirinaki, Magdalini

218

* : Hossein Ameri Novel Client Booking System in KLCC Twin Tower Bridge  

E-Print Network (OSTI)

Tower Bridge H. Ameri* University Malaya Center of research and applied electronics, University as well as scheduling tours to visit "Petronas Twin Towers Sky Bridge". The system should at least support of this system are tourist who would like to visit the twin towers sky bridge, system operators that includes

Paris-Sud XI, Université de

219

On the growth of Betti numbers in $p$-adic analytic towers.  

E-Print Network (OSTI)

We study the asymptotic growth of Betti numbers in tower of finite covers and provide simple proofs of approximation results, which were previously obtained by Calegari-Emerton, in the generality of arbitrary p-adic analytic towers of covers. Further, we also obtain partial results about arbitrary pro-$p$ towers.

Nicolas Bergeron; Peter Linnell; Wolfgang Lck; Roman Sauer

220

Enhanced quantum efficiency of amorphous silicon thin film solar cells with the inclusion of a rear-reflector thin film  

SciTech Connect

We investigated the growth mechanism of amorphous silicon thin films by implementing hot-wire chemical vapor deposition and fabricated thin film solar cell devices. The fabricated cells showed efficiencies of 7.5 and 8.6% for the samples without and with the rear-reflector decomposed by sputtering, respectively. The rear-reflector enhances the quantum efficiency in the infrared spectral region from 550 to 750?nm. The more stable quantum efficiency of the sample with the inclusion of a rear-reflector than the sample without the rear-reflector due to the bias effect is related to the enhancement of the short circuit current.

Park, Seungil [Department of Mechanical Engineering, Chonbuk National University, Jeonju 561-756 (Korea, Republic of); Energy Conversions Technology Center, Korea Institute of Industrial Technology, Cheonan 331-825 (Korea, Republic of); Yong Ji, Hyung; Jun Kim, Myeong; Hyeon Peck, Jong [Energy Conversions Technology Center, Korea Institute of Industrial Technology, Cheonan 331-825 (Korea, Republic of); Kim, Keunjoo, E-mail: kimk@chonbuk.ac.kr [Department of Mechanical Engineering, Chonbuk National University, Jeonju 561-756 (Korea, Republic of)

2014-02-17T23:59:59.000Z

Note: This page contains sample records for the topic "reflector power tower" 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

Heavy reflector experiments in the IPEN/MB-01 reactor: Stainless steel, carbon steel and nickel  

SciTech Connect

New experiments devoted to the measurements of physical parameters of a light water core surrounded by a heavy reflector were performed in the IPEN/MB-01 research reactor facility. These experiments comprise three sets of heavy reflector (SS-304, Carbon Steel, and Nickel) in a form of laminates around 3 mm thick. Each set was introduced individually in the west face of the core of the IPEN/MB-01 reactor. The aim here is to provide high quality experimental data for the interpretation and validation of the SS-304 heavy reflector calculation methods. The experiments of Carbon Steel, which is composed mainly of iron, and Nickel were performed to provide a consistent and an interpretative check for the SS-304 reflector experiment. The experimental results comprise critical control bank positions, temperatures and reactivities as a function of the number of the plates. Particularly to the case of Nickel, the experimental data are unique of its kind. The theoretical analysis was performed by MCNP-5 with the nuclear data library ENDF/B-VII.0. It was shown that this nuclear data library has a very good performance up to thirteen plates and overestimates the reactivity for higher number of plates independently of the type of the reflector.

Santos, Adimir dos; Andrade e Silva, Graciete Simoes de; Jerez, Rogerio; Liambos Mura, Luis Felipe; Fuga, Rinaldo [Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP Av. Prof. Lineu Prestes 2242 - CEP 05508-000 Sao Paulo, SP (Brazil)

2013-05-06T23:59:59.000Z

222

SunLab: Concentrating Solar Power Program Overview  

SciTech Connect

DOE's Concentrating Solar Power (CSP) program is collaborating with its partners in the private sector to develop two new solar technologies -- power towers and dish/engines -- to meet the huge commercial potential for solar power. Concentrating solar power plants produce electric power by first converting the sun's energy into heat, and then to electricity in a conventional generator.

NONE

1998-11-24T23:59:59.000Z

223

Advanced Reflector and Absorber Materials (Fact Sheet), Thermal Systems Group: CSP Capabilities (TSG)  

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

Ideally, we want reflector Ideally, we want reflector materials in a CSP plant to last 20 to 30 years and cost less than $2.50 per square foot (or $25 per square meter) to manufacture. Highly specular mirrors should have better than 95% reflectance into a 4-milliradian full-cone angle and should resist soiling in all outdoor conditions. NREL focuses on achieving these goals by creating and applying testing procedures that accurately predict the performance and lifetime of materials. Some testing is relatively brief, lasting several weeks, whereas other processes may take several months or even years. We evaluate the potential of reflector (mirror) and absorber (receiver) materials in the three areas described below, working with our industry partners to develop technologies that will

224

Linear Concentrator System Basics for Concentrating Solar Power...  

Office of Environmental Management (EM)

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

225

Operation and Maintenance Methods in Solar Power Plants  

Science Journals Connector (OSTI)

A solar chimney power plant has a high chimney (tower), with a height of up ... , the roof curves upward to join the chimney, creating a funnel. The sun heats ... is absorbed by the water within the dark solar pa...

Mustapha Hatti

2014-01-01T23:59:59.000Z

226

Wafer-Bonded Internal Back-Surface Reflectors for Enhanced TPV Performance  

SciTech Connect

This paper discusses recent efforts to realize GaInAsSb/GaSb TPV cells with an internal back-surface reflector (BSR). The cells are fabricated by wafer bonding the GaInAsSb/GaSb device layers to GaAs substrates with a dielectric/Au reflector, and subsequently removing the GaSb substrate. The internal BSR enhances optical absorption within the device while the dielectric layer provides electrical isolation. This approach is compatible with monolithic integration of series-connected TPV cells and can mitigate the requirements of filters used for front-surface spectral control.

C.A. Wang; P.G. Murphy; P.W. O'Brien; D.A. Shiau; A.C. Anderson; Z.L. Liau; D.M. Depoy; G. Nichols

2002-08-12T23:59:59.000Z

227

INCREASED CELL EFFICIENCY IN InGaAs THIN FILM SOLAR CELLS WITH DIELECTRIC AND METAL BACK REFLECTORS  

E-Print Network (OSTI)

INCREASED CELL EFFICIENCY IN InGaAs THIN FILM SOLAR CELLS WITH DIELECTRIC AND METAL BACK REFLECTORS solar cells using back reflectors. We studied absorption enhancement in InGaAs and InGaAsP thin film and metal, on InGaAs thin film solar cell performance by device modeling and nu- merical simulations. DEVICE

Atwater, Harry

228

Tower City, North Dakota: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Tower City, North Dakota: Energy Resources Tower City, North Dakota: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 46.9227548°, -97.6739889° 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":46.9227548,"lon":-97.6739889,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

229

Advanced Lighting Controls - My Venture from the Ivory Tower  

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

Advanced Lighting Controls - My Venture from the Ivory Tower Advanced Lighting Controls - My Venture from the Ivory Tower Speaker(s): Charlie Huizenga Date: June 15, 2012 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Dragan Charlie Curcija Lighting energy represents 30-40% of commercial building electricity consumption, yet very few buildings have advanced lighting controls. The potential energy savings are tremendous as is the opportunity to reduce demand on the grid during critical peak use periods. Charlie will describe how low-cost wireless radio technology developed at UC Berkeley and commercialized by Adura Technologies is creating a paradigm shift in the way we think about controlling lighting. Beyond deep energy savings and demand response, the technology offers personal control for occupants and

230

Geometry of tower-type solar electric station heliostat field  

SciTech Connect

A general method is presented for calculating the angular positions of an arbitrary heliostat at an arbitrary position in a heliostat field surrounding a tower-type solar electric station as a function of solar position. A system of angular coordinates is used which rotates with the solar azimuth direction around the collecting tower, resulting in an expression for the proper orientation of heliostat mirrors that is independent of local latitude, solar declination and time of day. The lines on the horizontal plane of the heliostat field characterized by the same values of the angles governing the horizontal inclination of the corresponding heliostat for a given solar elevation form two families of hyperbolas with vertexes facing the center of the field. Such isoline drawings constructed from the calculations may be used to determine the limiting values of the heliostat angles during the daily and seasonal course of operation of the heliostat facility.

Tepliakov, D.I.; Aparisi, R.R.

1980-01-01T23:59:59.000Z

231

Cooling Tower Energy Conservation Through Hydraulic Fan Drives  

E-Print Network (OSTI)

Fan Drive Eliminates These Problems from the Drive Train. The electric motor is at ground level; close coupled to a hydraulic pump, filters and oil reservoir. Hydraulic lines bring oil flow to the lightweight hydraulic motor mounted at the fan... Tower Fan Drives Are Many: It removes the hazard of costly fan wrecks and shaft coupling breakage. It eliminates gearbox maintenance, breakdown or replacement. The electric motor is mounted with the reservoir and pump at ground level for ease...

Dickerson, J.

232

A study of a cooling tower with variable packing geometries  

E-Print Network (OSTI)

of the Meohanioal Engineering Department~ for giving generously of his time, advioey and experi ense. STMKRY Three redwood packing styles -- rectangular~ square and triangular, having the same projected, area ? were tested under the same controlled conditions... of this wozk is to study the influence of the paoking geometries on water cooling tower performance oh raoteristics. To fulfill the purpose, thz ee different redwood paoking , . eometz'ies were tested and oompared. These ere z ectangular, square...

Azad, Abul Kalam

2012-06-07T23:59:59.000Z

233

Energy (Cost) Savings by Zero Discharge in Cooling Towers  

E-Print Network (OSTI)

. Relatively clean water may be added directly to the cooling tower basin (see Figure n. Reuse streams containing high suspended solids but of otherwise acceptable quality may be input just before the filters ~n the J The remainingireuse The flowrate..., silica, phos phates, and suspended solids. Other potential foulants and scale-forming species must be controlled by inhibitors or removed by an additional process in the sidestream treatment. Waste streams with scaling and corrosion potential before...

Matson, J. V.; Gardiner, W. M.; Harris, T. G.; Puckorius, P. R.

1982-01-01T23:59:59.000Z

234

Energy Tower combined with pumped storage and desalination: Optimal design and analysis  

Science Journals Connector (OSTI)

The Energy Tower (ET) is a power plant project which uses hot dry air and seawater to produce electricity. An optimized design of a system that is a combination of an ET, pumped storage and seawater desalination plant is considered. A model set covering each subsystem, and results of the optimized design for a project in the area of Eilat are presented. The additional benefit from combining the systems comes from an efficient use of the energy in the brine water coming from the desalination process, and from using pumped storage in an unconventional way. The benefits of the combined system lead to an increase of 14% in the annual net profit, compared to the sum of profits from optimally designed stand-alone systems.

E. Omer; R. Guetta; I. Ioslovich; P.O. Gutman; M. Borshchevsky

2008-01-01T23:59:59.000Z

235

Restoring the image of reflectors using the C-SAFT method during multiple reflection of echo signals from the boundaries of a cylindrical inspection object  

Science Journals Connector (OSTI)

A modified method of combined SAFT (C-SAFT) for restoring the images of reflectors is ... obtain images of reflectors by the M-C-SAFT method using many acoustic schemes. The images...

E. G. Bazulin

2013-02-01T23:59:59.000Z

236

Analysis of large reflector antennas using CSP fringe formulation and higher-order diffraction  

E-Print Network (OSTI)

Analysis of large reflector antennas using CSP fringe formulation and higher-order diffraction- tric conductor (PEC) objects when illuminated by a Complex Source Points (CSP) beam expansion (S of a CSP-expansion illumination. In this work we discuss an application of the CSP fringe formulation

Nehorai, Arye

237

Polyhedral Specular Reflector Design for Ultra-High Spectrum Splitting Solar Module Efficiencies (>50%)  

E-Print Network (OSTI)

Polyhedral Specular Reflector Design for Ultra-High Spectrum Splitting Solar Module Efficiencies., Pasadena, CA, USA 95555-0345 ABSTRACT One pathway to achieving ultra-high solar efficiencies (>50, multijunction solar cell, solar concentrator 1. INTRODUCTION Solar cell efficiency is increased through

Atwater, Harry

238

Evaluation of Hardware and Procedures for Astronaut Assembly and Repair of Large Precision Reflectors  

Science Journals Connector (OSTI)

A detailed procedure is presented that enables astronauts in extravehicular activity (EVA) to efficiently assemble and repair large (i.e., greater than 10m-diameter) segmented reflectors, supported by a truss, for space-based optical or radio-frequency ...

Lake Mark S.; Jr Walter L. Heard; Watson Judith J.; Collins Timothy J.

2000-08-01T23:59:59.000Z

239

A SOLAR STILL AUGMENTED WITH A FLAT-PLATE COLLECTOR AND A REFLECTOR  

E-Print Network (OSTI)

A SOLAR STILL AUGMENTED WITH A FLAT-PLATE COLLECTOR AND A REFLECTOR A. Saleh A. Badran Mechanical ­ Jordan Amman ­ Jordan e-mail: asaleh@philadelphia.edu.jo e-mail: badran@ju.edu.jo ABSTRACT A solar distillation system was built and tested to study the effect of increasing the solar radiation incident

240

DESIGN AND TESTING FOR NOVEL JOINT FOR WAVE REFLECTORS James Tedd1  

E-Print Network (OSTI)

DESIGN AND TESTING FOR NOVEL JOINT FOR WAVE REFLECTORS James Tedd1 , Erik Friis-Madsen2 , and Peter of the Wave Dragon has begun. This paper describes the design and testing process behind this. Tests conducted design. This testing has influenced the design and allowed construction to begin on refitting the joint

Note: This page contains sample records for the topic "reflector power tower" 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

Surface and Tower Meteorological Instrumentation at Atqasuk (METTWR2H) Handbook  

SciTech Connect

The Atqasuk meteorology station (AMET) uses mainly conventional in situ sensors to measure wind speed, wind direction, air temperature, dew point, and humidity mounted on a 10-m tower. It also obtains barometric pressure, visibility and precipitation data from sensors at or near the base of the tower. In addition, a chilled mirror hygrometer (CMH) is located at 1 m for comparison purposes. Temperature and relative humidity (RH) probes are mounted at 2 m and 5 m on the tower.

Ritsche, MT

2006-01-01T23:59:59.000Z

242

An investigation of design alternatives for 328-ft (100-m) tall wind turbine towers.  

E-Print Network (OSTI)

??As wind turbines are continued to be placed at higher elevations, the need for taller wind turbine towers becomes necessary. However, there are multiple challenges (more)

Lewin, Thomas James

2010-01-01T23:59:59.000Z

243

Structural Analyses of Wind Turbine Tower for 3 kW Horizontal Axis Wind Turbine.  

E-Print Network (OSTI)

?? Structure analyses of a steel tower for Cal Poly's 3 kW small wind turbine is presented. First, some general design aspects of the wind (more)

Gwon, Tae gyun (Tom)

2011-01-01T23:59:59.000Z

244

Ivanpah: World's Largest Concentrating Solar Power Plant  

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

The Ivanpah Solar Energy Generating System has the capacity to generate 392 megawattsof clean electricity -- enough to power 94,400 average American homes. As the first commercial deployment of innovative power tower CSP technology in the United States, the Ivanpah project was the recipient of a $1.6 billion loan guarantee from the Departments Loan Programs Office (LPO).

245

Performance characteristics of an induced draft, counterflow, spray cooling tower  

E-Print Network (OSTI)

V Total mass transfer coefi'icient, pounds of water per hour per square Zoot per pound of vapor per pound of dry air Tower characteristic Number of nozzles used XX SURVEY OF LXTERATUHE The currently accepted theory of heat and mass exchange between... a stream of' water droplets and a stream of unsatu rated air was first proposed by Robinson (8)o in 1MS, and, ln 19S5$ by Waker g Lewi s y and 5!cAdams ( 1 ) . Al so in 1985, -gerlrel (5), using the same basic equations somewhat moxe rigorously...

Jones, Charles Edward

2012-06-07T23:59:59.000Z

246

A study of a cooling tower with variable packing heights  

E-Print Network (OSTI)

I, tower of eight feet by ei, . ht feet section. . W. W. Smith (18) reported in 1&56, his results and con- clusions for mass transfer and resistance to air flow for three redwood packihg styles having essent1ally the same vert1cal projected area, made... the time to ~efinitel. ?; sta. e that the redwood packing of re tangulor section (width-hei~ht ratio '). g(~) is the best packin? typo. 'Ihe field is till open for experimentation with packings of other avail, ble mat- erials and packins f...

Khan, A. M. M. Farid

2012-06-07T23:59:59.000Z

247

The development of large area saturable Bragg reflectors for the generation of widely-tunable ultra-short pulses  

E-Print Network (OSTI)

This thesis focuses on the realization of two photonic devices; 1) semiconductor lasers and 2) large area broadband Saturable Bragg Reflectors (SBRs). Semiconductor lasers explore the use of 3D and 2D quantum confinement ...

Nabanja, Sheila P

2012-01-01T23:59:59.000Z

248

Semitransparent metal or distributed Bragg reflector for wide-viewing-angle organic light-emitting-diode microcavities  

Science Journals Connector (OSTI)

Microcavities for organic light-emitting devices (OLEDs) with a metal mirror on one side and a distributed Bragg reflector (DBR) on the other side have been extensively studied in...

Neyts, Kristiaan; De Visschere, Patrick; Fork, David K; Anderson, Greg B

2000-01-01T23:59:59.000Z

249

Advanced ultraviolet-resistant silver mirrors for use in solar reflectors  

DOE Patents (OSTI)

A silver mirror construction that maintains a high percentage of hemispherical reflectance throughout the UV and visible spectrum when used in solar reflectors, comprising:a) a pressure sensitive adhesive layer positioned beneath a silver overlay;b) a polymer film disposed on the silver overlay;c) an adhesive layer positioned on the polymer film; andd) a UV screening acrylic film disposed on the adhesive layer.

Jorgensen, Gary J. (Pine, CO); Gee, Randy (Arvada, CO)

2009-11-03T23:59:59.000Z

250

Well-posedness and controllability of a wind turbine tower model  

Science Journals Connector (OSTI)

......the tower is uniform. Keywords: wind turbine tower; coupled system; SCOLE...aim of this paper is to develop a wind turbine model in the plane of the turbine...force and torque control. Large offshore turbines are subjected to severe......

Xiaowei Zhao; George Weiss

2011-03-01T23:59:59.000Z

251

Study of Different Cleaning Methods for Solar Reflectors Used in CSP Plants  

Science Journals Connector (OSTI)

Abstract Soiling and dust accumulation in reflectors for concentrating solar plants (CSP) plants decrease their reflectance and, as a consequence, the solar field efficiency. Minimizing the cost of the cleanliness is a key issue for the solar-plant feasibility. This work is focused on optimizing the cleaning method of solar reflectors for CSP applications under real outdoor conditions in a semi-desert climate. The testing consisted on outdoor exposing of solar reflectors and applying different cleaning methods. According to results obtained, the most effective cleaning method is the one based on demineralized water and a brush, with an average efficiency of 98.8% in rainy periods and 97.2% in dry seasons. The innovative cleaning method based on a steam device with a soft tissue was inefficient (efficiency of 97.3% in a rainy period). If the number of passes applied with the high- pressure demineralized water method is highly enough, this method is as effective as the one based on brushing and the addition of a detergent does not increase its effectiveness.

A. Fernndez-Garca; L. lvarez-Rodrigo; L. Martnez-Arcos; R. Aguiar; J.M. Mrquez-Pays

2014-01-01T23:59:59.000Z

252

Chemical Effect of Dry and Wet Cleaning of the Ru Protective Layer of the Extreme ultraviolet (EUV) Lithography Reflector  

SciTech Connect

The authors report the chemical influence of cleaning of the Ru capping layer on the extreme ultraviolet (EUV) reflector surface. The cleaning of EUV reflector to remove the contamination particles has two requirements: to prevent corrosion and etching of the reflector surface and to maintain the reflectivity functionality of the reflector after the corrosive cleaning processes. Two main approaches for EUV reflector cleaning, wet chemical treatments [sulfuric acid and hydrogen peroxide mixture (SPM), ozonated water, and ozonated hydrogen peroxide] and dry cleaning (oxygen plasma and UV/ozone treatment), were tested. The changes in surface morphology and roughness were characterized using scanning electron microscopy and atomic force microscopy, while the surface etching and change of oxidation states were probed with x-ray photoelectron spectroscopy. Significant surface oxidation of the Ru capping layer was observed after oxygen plasma and UV/ozone treatment, while the oxidation is unnoticeable after SPM treatment. Based on these surface studies, the authors found that SPM treatment exhibits the minimal corrosive interactions with Ru capping layer. They address the molecular mechanism of corrosive gas and liquid-phase chemical interaction with the surface of Ru capping layer on the EUV reflector.

Belau, Leonid; Park, Jeong Y.; Liang, Ted; Seo, Hyungtak; Somorjai, Gabor A.

2009-04-10T23:59:59.000Z

253

Thermal performance upgrade of the Arkansas Nuclear One cooling tower: A ``root cause`` analysis approach  

SciTech Connect

The thermal performance efficiency of the natural draft cooling tower at Entergy Operations` 858 MWe Arkansas Nuclear One, Unit 2 was successfully upgraded to 101% of design performance capability in April 1994 as the end result of a unique root-cause analysis of the cooling tower`s long-standing performance deficiencies. Through application of state-of-the-art diagnostic testing methods and computer modeling techniques, Entergy was able to identify and correct air/water maldistribution problems in the 447 foot tall counterflow cooling tower at minimal cost. Entergy estimates that the savings realized, as a result of the 1.2 F reduction in cooling tower outlet water temperature, will pay for the thermal upgrade project in approximately 14 months.

Liffick, G.W. [Entergy Operations, Inc., Russellville, AR (United States); Cooper, J.W. Jr. [John Cooper and Associates, Tampa, FL (United States)

1995-10-01T23:59:59.000Z

254

Coupled dynamics of a tower with an elevated wave tank. Part 1: Equations of motion and eigenoscillations  

E-Print Network (OSTI)

Coupled dynamics of a tower with an elevated wave tank. Part 1: Equations of motion problem is derived to describe coupled dynamics of a tower with an elevated tank on the tower top, elevated tanks, Ritz'-Treftz method 1. INTRODUCTION Modeling the dynamic behavior of elevated liquid

255

Analysis of recoverable waste heat of circulating cooling water in hot-stamping power system  

Science Journals Connector (OSTI)

This article studies the possibility of using heat pump instead of cooling tower to decrease temperature and recover waste heat of circulating cooling water of power system. Making use of heat transfer theory ......

Panpan Qin; Hui Chen; Lili Chen; Chong Wang

2013-08-01T23:59:59.000Z

256

Energy 101: Concentrating Solar Power  

SciTech Connect

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

None

2010-01-01T23:59:59.000Z

257

Energy 101: Concentrating Solar Power  

ScienceCinema (OSTI)

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

None

2013-05-29T23:59:59.000Z

258

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

SciTech Connect

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

Ken Mortensen

2009-06-30T23:59:59.000Z

259

Operating characteristics of a spray tower for cooling gas at moderate temperatures  

E-Print Network (OSTI)

of multiport gas burners was placed. The top of the tower was fitted with an adapter, a square duct elbow and a reducing duct tying the top of the tower to a cyclone separator. A circular 12-inch elbow out of the top of the cyclone separator led to a venturi..., in the inlet-gas 11 stream, in the outlet-gas stream and in the ventur1. Wet bulb tempera- tures were obtained at top of tower and in the venturi by mercury-column thermometers fitted with wicks. Water-and gas-flow rates were measured by calibrated...

Legler, Bobby

2012-06-07T23:59:59.000Z

260

Improvement of risk estimate on wind turbine tower buckled by hurricane  

E-Print Network (OSTI)

Wind is one of the important reasonable resources. However, wind turbine towers are sure to be threatened by hurricanes. In this paper, method to estimate the number of wind turbine towers that would be buckled by hurricanes is discussed. Monte Carlo simulations show that our method is much better than the previous one. Since in our method, the probability density function of the buckling probability of a single turbine tower in a single hurricane is obtained accurately but not from one approximated expression. The result in this paper may be useful to the design and maintenance of wind farms.

Li, Jingwei

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "reflector power tower" 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

DOE Publishes Final Rule for the Request for Exclusion of 100 Watt R20 Short Incandescent Reflector Lamps from Energy Conservation Standards  

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

The Department of Energy has published a final rule regarding the request for exclusion of 100 Watt R20 short incandescent reflector lamps from energy conservation standards.

262

Rise Time of the Simulated VERITAS 12 m Davies-Cotton Reflector  

SciTech Connect

The Very Energetic Radiation Imaging Telescope Array System (VERITAS) will utilise Imaging Atmospheric Cherenkov Telescopes (IACTs) based on a Davies-Cotton design with f-number f/1.0 to detect cosmic gamma-rays. Unlike a parabolic reflector, light from the Davies-Cotton does not arrive isochronously at the camera. Here the effect of the telescope geometry on signal rise-time is examined. An almost square-pulse arrival time profile with a rise time of 1.7 ns is found analytically and confirmed through simulation.

White, Richard J. [School of Physics and Astronomy, University of Leeds (United Kingdom)

2005-02-21T23:59:59.000Z

263

Lamp system with conditioned water coolant and diffuse reflector of polytetrafluorethylene(PTFE)  

DOE Patents (OSTI)

A lamp system with a very soft high-intensity output is provided over a large area by water cooling a long-arc lamp inside a diffuse reflector of polytetrafluorethylene (PTFE) and titanium dioxide (TiO.sub.2) white pigment. The water is kept clean and pure by a one micron particulate filter and an activated charcoal/ultraviolet irradiation system that circulates and de-ionizes and biologically sterilizes the coolant water at all times, even when the long-arc lamp is off.

Zapata, Luis E. (Livermore, CA); Hackel, Lloyd (Livermore, CA)

1999-01-01T23:59:59.000Z

264

Chapter 10 - Solar Thermal Power Systems  

Science Journals Connector (OSTI)

Abstract Chapter 10 deals with solar thermal power systems. Initially, the general design considerations are given followed by the presentation of the three basic technologies. These include the parabolic trough collector system, which includes a description of the PTC power plant and outlook of the technology; the power tower systems and the dish systems. This is followed by the thermal analysis of the basic cycles of solar thermal power plants. Subsequently, solar updraft tower systems are examined, which include the initial steps and first demonstration, and the thermal analysis. Finally, solar ponds are examined, which is a form of large solar collector and storage system that can be used for solar power generation and include practical design considerations, salty water transmission estimation, methods of heat extraction, description of two large experimental solar ponds, and applications of solar ponds.

Soteris A. Kalogirou

2014-01-01T23:59:59.000Z

265

Lab Helps FAA Build Energy-Efficient Control Towers | Department of Energy  

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

Lab Helps FAA Build Energy-Efficient Control Towers Lab Helps FAA Build Energy-Efficient Control Towers Lab Helps FAA Build Energy-Efficient Control Towers April 23, 2010 - 10:57am Addthis With help from the Pacific Northwest National Laboratory and its subcontractor, Redhorse Corporation, the agency that keeps our country's airports running is bolstering its energy efficiency. The Federal Aviation Administration is developing building plans that save energy - and money - at five airports in the western U.S. Government agencies are required by law to audit their buildings, so the FAA saw some Recovery Act funding as an opportunity to help fund its energy audits. Air traffic control towers are a vital service for travelers, keeping air traffic free of accidents. Their accompanying base buildings house administrative offices and support systems.

266

Wind tunnel simulation of wind effect on a group of high Cooling towers  

Science Journals Connector (OSTI)

Aerodynamic interference between high cooling towers in the atmospheric boundary layer (ABL) and uniform flow has been discussed. For the 1/1000 ABL model set up in the 2.25m low speed wind tunnel at Peking Unive...

Yan Dachun; Li Chenxin

1987-02-01T23:59:59.000Z

267

Beyond the ivory tower : in search of a new form for campus-community relationships  

E-Print Network (OSTI)

The terms "ivory tower" and "town-gown" have long been used to characterize the relationship between institutions of higher education and the communities in which they reside. While these adversarial phrases reflect the ...

Bowman, Anne (Anne Renee)

2011-01-01T23:59:59.000Z

268

The Binary Cooling Tower Process: An Energy Conserving Water Reuse Technology  

E-Print Network (OSTI)

The Binary Cooling Tower (BCT) harnesses cooling system waste heat to accomplish concentration of waste and process streams. The BCT can also be integrated to isolate and improve the efficiency of critical cooling loops. This paper describes the BCT...

Lancaster, R. L.; Sanderson, W. G.; Cooke, R. L., Jr.

1981-01-01T23:59:59.000Z

269

WATTS TOWERS: THE EFFECTS OF THERMAL CYCLES ON THE FORMATION AND BEHAVIOR OF CRACKS  

E-Print Network (OSTI)

to make lasting repairs to the Watts Towers. 15 REFERENCES [1] LSTC. "LS-DYNA KEYWROD MANUAL." DYNA Support. Livermore Software Technology Corporation, n.d. Web. 5 Apr. 2013.

Spencer, Matthew T

2013-02-06T23:59:59.000Z

270

Microsoft Word - CX-Driscoll-Naselle-TowerMove-FY13_WEB.doc  

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

3 REPLY TO ATTN OF: KEPR-4 SUBJECT: Environmental Clearance Memorandum Stacie Hensley Project Manager - TEP-TPP-4 Proposed Action: Driscoll-Naselle No. 1 Tower Relocation Project...

271

"BECAUSE SOME STORIES DO LIVE FOREVER": STEPHEN KING'S THE DARK TOWER SERIES AS MODERN ROMANCE  

E-Print Network (OSTI)

Stephen King's Dark Tower series is a seven-volume work that contains elements from myths, fairy tales, American westerns, legends, popular culture, Gothic literature, and medieval romance. Few scholars have engaged with ...

McMurray, Rachel Elizabeth

2012-05-31T23:59:59.000Z

272

Data Center Economizer Cooling with Tower Water; Demonstration of a Dual Heat Exchanger Rack Cooling Device  

E-Print Network (OSTI)

LBNL-XXXXX Data Center Economizer Cooling with Tower Water;included a water- side economizer. This model estimated theand without a water-side economizer and including or not

Greenberg, Steve

2014-01-01T23:59:59.000Z

273

Exquisite corpse: a tower for the public in the era of exhausted modernity  

E-Print Network (OSTI)

Towers in Manhattan, especially in business areas, have historically used a single overarching system in order to visualize images of their corporate identity and immerse the public in the image of development. While using ...

Jang, Sungwoo

2012-01-01T23:59:59.000Z

274

Times Square Buildings Cond Nast Building Reuters Building Ernst & Young Building Times Square Tower  

Science Journals Connector (OSTI)

NEW YORKS Urban Development Corporations plan for Times Square called for four antiurbanistic office towers by Philip Johnson and John Burgee to stand guard like cops on the beat over what was viewed as a sq...

2005-01-01T23:59:59.000Z

275

See-through amorphous silicon solar cells with selectively transparent and conducting photonic crystal back reflectors for building integrated photovoltaics  

SciTech Connect

Thin semi-transparent hydrogenated amorphous silicon (a-Si:H) solar cells with selectively transparent and conducting photonic crystal (STCPC) back-reflectors are demonstrated. Short circuit current density of a 135?nm thick a-Si:H cell with a given STCPC back-reflector is enhanced by as much as 23% in comparison to a reference cell with an ITO film functioning as its rear contact. Concurrently, solar irradiance of 295?W/m{sup 2} and illuminance of 3480 lux are transmitted through the cell with a given STCPC back reflector under AM1.5 Global tilt illumination, indicating its utility as a source of space heating and lighting, respectively, in building integrated photovoltaic applications.

Yang, Yang [The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Room GB254B, Toronto, Ontario M5S 3G4 (Canada)] [The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Room GB254B, Toronto, Ontario M5S 3G4 (Canada); OBrien, Paul G. [Department of Materials Science and Engineering, University of Toronto, 184 College Street, Room 140, Toronto, Ontario M5S 3E4 (Canada) [Department of Materials Science and Engineering, University of Toronto, 184 College Street, Room 140, Toronto, Ontario M5S 3E4 (Canada); Materials Chemistry Research Group, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 (Canada); Ozin, Geoffrey A., E-mail: gozin@chem.utoronto.ca, E-mail: kherani@ecf.utoronto.ca [Materials Chemistry Research Group, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 (Canada); Kherani, Nazir P., E-mail: gozin@chem.utoronto.ca, E-mail: kherani@ecf.utoronto.ca [The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Room GB254B, Toronto, Ontario M5S 3G4 (Canada); Department of Materials Science and Engineering, University of Toronto, 184 College Street, Room 140, Toronto, Ontario M5S 3E4 (Canada)

2013-11-25T23:59:59.000Z

276

24 M meteorological tower data report period: January--December, 1994  

SciTech Connect

This report was prepared by the Desert Research Institute (DRI) for the U.S. Department of Energy (DOE). It summarizes meteorological data collected at the 24 meter tower at the Nevada Test Site Hazardous Material Spill Center (HAZMAT) located at Frenchman Flat near Mercury, Nevada, approximately 75 miles northwest of Las Vegas, Nevada. The tower was originally installed in July, 1993 to characterize baseline conditions for an EPA sponsored experimental research program at the HAZMAT.

Freeman, D.; Bowen, J.; Egami, R. [and others] [and others

1997-08-01T23:59:59.000Z

277

Surface and Tower Meteorological Instrumentation at Barrow (METTWR4H) Handbook  

SciTech Connect

The Barrow meteorology station (BMET) uses mainly conventional in situ sensors mounted at four different heights (2m, 10m, 20m and 40m) on a 40 m tower to obtain profiles of wind speed, wind direction, air temperature, dew point and humidity. It also obtains barometric pressure, visibility and precipitation data from sensors at the base of the tower. Additionally, a Chilled Mirror Hygrometer and an Ultrasonic wind speed sensor are located near the 2m level for comparison purposes.

Ritsche, MT

2008-04-01T23:59:59.000Z

278

Measurable energy savings of installing variable frequency drives for cooling towers fans, compared to dual speed motors  

Science Journals Connector (OSTI)

Abstract In recent years the building management system (BMS) controllers have been used to control the operation of heating, ventilation, and air conditioning system in addition to lighting and some electrical equipment in order to save energy. In the water cooled system, the BMS controls the operation process of the cooling towers (CTs) fans of dual speed motors to maintain a constant leaving water temperature for different cooling loads and different ambient wet bulb temperature (WBT). This paper presents the effect of installing variable frequency drives (VFDs) for \\{CTs\\} fans in Kuwait during summer season on energy savings compared to dual speed control. The results have shown that with VFD mode, the reduction in water consumption was over 13% compared to the commonly used dual speed mode. More importantly, the combined power for the chillers and the \\{CTs\\} fans for the same amount of cooling produced were reduced by 5.8% in the VFD mode.

E. Al-Bassam; R. Alasseri

2013-01-01T23:59:59.000Z

279

NETL: Water-Energy Interface - Power Plant Water Management  

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

An Innovative Fresh Water Production Process for Fossil Fired Power Plants An Innovative Fresh Water Production Process for Fossil Fired Power Plants Using Energy Stored in Main Condenser Cooling Water - University of Florida This project replaces the cooling tower in a fossil fired power plant with an innovative diffusion driven desalination (DDD) plant that will render the power plant a net producer of fresh water. The energy required to drive the desalination process comes from the main condenser cooling water, which would otherwise be discharged. Saline water is used to condense the low pressure steam exiting the turbine. The hot, saline water exiting the condenser is sprayed into the top of a diffusion tower. The diffusion tower is filled with high surface area packing material such as that used in air stripping towers to enhance the water/air surface area. Air is blown through the bottom of the tower and becomes humidified. The humidified air goes to a direct-contact condenser where the fresh water is condensed. This process has an advantage over conventional desalination technology in that it may be driven by waste heat with very low thermodynamic availability. Also, cold air is a byproduct of this process which can be used to cool buildings.

280

Multiplier, moderator, and reflector materials for lithium-vanadium fusion blankets.  

SciTech Connect

The self-cooled lithium-vanadium fusion blanket concept has several attractive operational and environmental features. In this concept, liquid lithium works as the tritium breeder and coolant to alleviate issues of coolant breeder compatibility and reactivity. Vanadium alloy (V-4Cr-4Ti) is used as the structural material because of its superior performance relative to other alloys for this application. However, this concept has poor attenuation characteristics and energy multiplication for the DT neutrons. An advanced self-cooled lithium-vanadium fusion blanket concept has been developed to eliminate these drawbacks while maintaining all the attractive features of the conventional concept. An electrical insulator coating for the coolant channels, spectral shifter (multiplier, and moderator) and reflector were utilized in the blanket design to enhance the blanket performance. In addition, the blanket was designed to have the capability to operate at high loading conditions of 2 MW/m{sup 2} surface heat flux and 10 MW/m{sup 2} neutron wall loading. This paper assesses the spectral shifter and the reflector materials and it defines the technological requirements of this advanced blanket concept.

Gohar, Y.; Smith, D. L.

1999-10-07T23:59:59.000Z

Note: This page contains sample records for the topic "reflector power tower" 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

Wind for Schools Project Power System Brief, Wind Powering America Fact Sheet Series  

SciTech Connect

Wind Powering America's (WPA's) Wind for Schools project uses a basic system configuration for each school project. The system incorporates a single SkyStream wind turbine, a 70-ft guyed tower, disconnect boxes at the base of the turbine and at the school, and an interconnection to the school's electrical system. This document provides a detailed description of each system component.

Baring-Gould, I.

2009-05-01T23:59:59.000Z

282

Photonic crystal membrane reflectors by magnetic field-guided metal-assisted chemical etching  

SciTech Connect

Metal-assisted chemical etching (MacEtch) is a simple etching method that uses metal as the catalyst for anisotropic etching of semiconductors. However, producing nano-structures using MacEtch from discrete metal patterns, in contrast to interconnected ones, has been challenging because of the difficulties in keeping the discrete metal features in close contact with the semiconductor. We report the use of magnetic field-guided MacEtch (h-MacEtch) to fabricate periodic nanohole arrays in silicon-on-insulator (SOI) wafers for high reflectance photonic crystal membrane reflectors. This study demonstrates that h-MacEtch can be used in place of conventional dry etching to produce ordered nanohole arrays for photonic devices.

Balasundaram, Karthik; Mohseni, Parsian K.; Li, Xiuling, E-mail: wzhou@uta.edu, E-mail: xiuling@illinois.edu [Micro and Nanotechnology Laboratory, Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)] [Micro and Nanotechnology Laboratory, Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States); Shuai, Yi-Chen; Zhao, Deyin; Zhou, Weidong, E-mail: wzhou@uta.edu, E-mail: xiuling@illinois.edu [Department of Electrical Engineering, NanoFAB Center, University of Texas at Arlington, Arlington, Texas 76019 (United States)] [Department of Electrical Engineering, NanoFAB Center, University of Texas at Arlington, Arlington, Texas 76019 (United States)

2013-11-18T23:59:59.000Z

283

Greek research reactor performance characteristics after addition of beryllium reflector and LEU fuel  

SciTech Connect

The GRR-1 is a 5-MW pool-type, light-water-moderated and-cooled reactor fueled with MTR-type fuel elements. Recently received Be reflector blocks will soon be added to the core to add additional reactivity until fresh LEU fuel arrives. REBUS-3 xy fuel cycle analyses, using burnup dependent cross sections, were performed to assist in fuel management decisions for the water- and Be-reflected HEU nonequilibrium cores. Cross sections generated by EPRI-CELL have been benchmarked to identical VIM Monte Carlo models. The size of the Be-reflected LEU core has been reduced to 30 elements compared to 35 for the HEU water-reflected core, and an equilibrium cycle calculation has been performed.

Deen, J.R.; Snelgrove, J.L. [Argonne National Lab., IL (United States); Papastergiou, C. [National Center for Scientific Research, Athens (Greece)

1992-12-31T23:59:59.000Z

284

Greek research reactor performance characteristics after addition of beryllium reflector and LEU fuel  

SciTech Connect

The GRR-1 is a 5-MW pool-type, light-water-moderated and-cooled reactor fueled with MTR-type fuel elements. Recently received Be reflector blocks will soon be added to the core to add additional reactivity until fresh LEU fuel arrives. REBUS-3 xy fuel cycle analyses, using burnup dependent cross sections, were performed to assist in fuel management decisions for the water- and Be-reflected HEU nonequilibrium cores. Cross sections generated by EPRI-CELL have been benchmarked to identical VIM Monte Carlo models. The size of the Be-reflected LEU core has been reduced to 30 elements compared to 35 for the HEU water-reflected core, and an equilibrium cycle calculation has been performed.

Deen, J.R.; Snelgrove, J.L. (Argonne National Lab., IL (United States)); Papastergiou, C. (National Center for Scientific Research, Athens (Greece))

1992-01-01T23:59:59.000Z

285

A new design of wind tower for passive ventilation in buildings to reduce energy consumption in windy regions  

Science Journals Connector (OSTI)

Abstract In todays world, the significance of energy and energy conservation is a common knowledge. Wind towers can save the electrical energy used to provide thermal comfort during the warm months of the year, especially during the peak hours. In this paper, we propose a new design for wind towers. The proposed wind towers are installed on top of the buildings, in the direction of the maximum wind speed in the region. If the desired wind speed is accessible in several directions, additional wind towers can be installed in several positions. The proposed wind tower can also rotate and set itself in the direction of the maximum wind speed. In the regions where the wind speed is low, to improve the efficiency of the system a solar chimney or a one-sided wind tower can be installed in another part of the building in the opposite direction. Using transparent materials in the manufacturing of the proposed wind towers improves the use of natural light inside the building. The major advantage of wind towers is that they are passive systems requiring no energy for operation. Also, wind towers reduce electrical energy consumption and environmental pollution.

A.R. Dehghani-sanij; M. Soltani; K. Raahemifar

2015-01-01T23:59:59.000Z

286

Reactivity Accountability Attributed to Reflector Poisons in the High Flux Isotope Reactor  

SciTech Connect

The objective of this study is to develop a methodology to predict the reactivity impact as a function of outage time between cycles of 3He, 6Li, and other poisons in the High Flux Isotope Reactor s (HFIR) beryllium reflector. The reactivity worth at startup of the HFIR has been incorrectly predicted in the past after the reactor has been shut-down for long periods of time. The incorrect prediction was postulated to be due to the erroneous calculation of 3He buildup in the beryllium reflector. It is necessary to develop a better estimate of the start-of-cycle symmetric critical control element positions since if the estimated and actual symmetrical critical control element positions differ by more than $1.55 in reactivity (approximately one-half inch in control element startup position), HFIR is to be shutdown and a technical evaluation is performed to resolve the discrepancy prior to restart. 3He is generated and depleted during operation, but during an outage, the depletion of 3He ceases because it is a stable isotope. 3He is born from the radioactive decay of tritium, and thus the concentration of 3He increases during shutdown. SCALE, specifically the TRITON and CSAS5 control modules including the KENO V.A, COUPLE, and ORIGEN functional modules were utilized in this study. An equation relating the down time (td) to the change in symmetric control element position was generated and validated against measurements for approximately 40 HFIR operating cycles. The newly-derived correlation was shown to improve accuracy of predictions for long periods of down time.

Chandler, David [ORNL; Maldonado, G Ivan [ORNL; Primm, Trent [ORNL

2009-12-01T23:59:59.000Z

287

At 200 feet tall, the Tower at Sandia National Laboratories  

E-Print Network (OSTI)

components and systems in proposed solar thermal electrical plants planned for large-scale power generation for a variety of activities, including: · Nuclear thermal flash simulation. · Thermal performance testingkW thermal power and peak fluxes up to 1500 W/cm2. They are individually controlled to track to sun

288

Technology to Facilitate the Use of Impaired Waters in Cooling Towers  

SciTech Connect

The project goal was to develop an effective silica removal technology and couple that with existing electro-dialysis reversal (EDR) technology to achieve a cost effective treatment for impaired waters to allow for their use in the cooling towers of coal fired power plants. A quantitative target of the program was a 50% reduction in the fresh water withdrawal at a levelized cost of water of $3.90/Kgal. Over the course of the program, a new molybdenum-modified alumina was developed that significantly outperforms existing alumina materials in silica removal both kinetically and thermodynamically. The Langmuir capacity is 0.11g silica/g adsorbent. Moreover, a low cost recycle/regeneration process was discovered to allow for multiple recycles with minimal loss in activity. On the lab scale, five runs were carried out with no drop in performance between the second and fifth run in ability to absorb the silica from water. The Mo-modified alumina was successfully prepared on a multiple kilogram scale and a bench scale model column was used to remove 100 ppm of silica from 400 liters of simulated impaired water. Significant water savings would result from such a process and the regeneration process could be further optimized to reduce water requirements. Current barriers to implementation are the base cost of the adsorbent material and the fine powder form that would lead to back pressure on a large column. If mesoporous materials become more commonly used in other areas and the price drops from volume and process improvements, then our material would also lower in price because the amount of molybdenum needed is low and no additional processing is required. There may well be engineering solutions to the fine powder issue; in a simple concept experiment, we were able to pelletize our material with Boehmite, but lost performance due to a dramatic decrease in surface area.

Colborn, Robert

2012-04-30T23:59:59.000Z

289

24 m meteorological tower data report period: January through December, 1995  

SciTech Connect

This report was prepared by the Desert Research Institute (DRI) for the US Department of Energy (DOE). It summarizes meteorological data collected at the 24 meter tower at the Nevada Test Site Hazardous Material Spill Center (HAZMAT) located at Frenchman Flat near Mercury, Nevada, approximately 75 miles northwest of Las Vegas, Nevada. The tower was originally installed in July, 1993 to characterize baseline conditions for an EPA sponsored experimental research program at the HAZMAT. A previous report reported monitoring results for 1994. This report presents results of the monitoring for January--December, 1995, providing: a status of the measurement systems (including any quality assurance activities) during the report period and a summary of the meteorological conditions at the HAZMAT during the report period. The scope of the report is limited to summary data analyses and does not include extensive meteorological analysis. The tower was instrumented at 8 levels. Wind speed, wind direction, and temperature were measured at all 8 levels. Relative humidity was measured at 3 levels. Solar and net radiation were measured at 2 meters above the ground. Barometric pressure was measured at the base of the tower and soil temperature was measured near the base of the tower.

Freeman, D.; Bowen, J.B.; Egami, R.; Coulombe, W.; Crow, D.; Cristani, B.; Schmidt, S.

1997-12-01T23:59:59.000Z

290

Concentrating solar power | Open Energy Information  

Open Energy Info (EERE)

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

291

Concentrating solar power | Open Energy Information  

Open Energy Info (EERE)

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

292

Project Profile: High-Temperature Solar Selective Coating Development for Power Tower Receivers  

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

Sandia National Laboratories (SNL), under the National Laboratory R&D competitive funding opportunity, is developing, characterizing, and refining advanced solar-selective coatings with high solar-weighted absorptivity (a > 0.95) and low emittance (e

293

Suppression of the vibrations of wind turbine towers  

Science Journals Connector (OSTI)

......renewable and clean energy, wind power is rapidly increasing its...capacity in many countries. Large offshore turbines are subjected to severe...2002) Dynamic modeling of wind farm grid interaction. Wind Eng., 26, 191208. LITTMAN......

Xiaowei Zhao; George Weiss

2011-09-01T23:59:59.000Z

294

Criticality Safety Analysis on the Mixed Be, Nat-U, and C (Graphite) Reflectors in 55-Gallon Waste Drums and Their Equivalents for HWM Applications  

SciTech Connect

The objective of this analysis is to develop and establish the technical basis on the criticality safety controls for the storage of mixed beryllium (Be), natural uranium (Nat-U), and carbon (C)/graphite reflectors in 55-gallon waste containers and/or their equivalents in Hazardous Waste Management (HWM) facilities. Based on the criticality safety limits and controls outlined in Section 3.0, the operations involving the use of mixed-reflector drums satisfy the double-contingency principle as required by DOE Order 420.1 and are therefore criticality safe. The mixed-reflector mass limit is 120 grams for each 55-gallon drum or its equivalent. a reflector waiver of 50 grams is allowed for Be, Nat-U, or C/graphite combined. The waived reflectors may be excluded from the reflector mass calculations when determining if a drum is compliant. The mixed-reflector drums are allowed to mix with the typical 55-gallon one-reflector drums with a Pu mass limit of 120 grams. The fissile mass limit for the mixed-reflector container is 65 grams of Pu equivalent each. The corresponding reflector mass limits are 300 grams of Be, and/or 100 kilograms of Nat-U, and/or 110 kilograms of C/graphite for each container. All other unaffected control parameters for the one-reflector containers remain in effect for the mixed-reflector drums. For instance, Superior moderators, such as TrimSol, Superla white mineral oil No. 9, paraffin, and polyethylene, are allowed in unlimited quantities. Hydrogenous materials with a hydrogen density greater than 0.133 gram/cc are not allowed. Also, an isolation separation of no less than 76.2 cm (30-inch) is required between a mixed array and any other array. Waste containers in the action of being transported are exempted from this 76.2-cm (30-inch) separation requirement. All deviations from the CS controls and mass limits listed in Section 3.0 will require individual criticality safety analyses on a case-by-case basis for each of them to confirm their criticality safety prior to their deployment and implementation.

Chou, P

2011-12-14T23:59:59.000Z

295

Modeling and Simulation of Wind Shear and Tower Shadow on Wind Turbines  

Science Journals Connector (OSTI)

Abstract This paper focuses on the modeling and simulation in Matlab/Simulink of the effects of wind shear and tower shadow in a three bladed, variable-speed wind turbine system. The study of the mechanical stress, the mitigation of the torque oscillations and the improvement of the aerodynamic efficiency below rated wind speed, can be attained with a proper modeling of the turbine system. This paper is a contribution on the study of the effects of wind shear and tower shadow, often approximated or neglected, that have to be properly understood, considered and modeled in order to get a better performance of the turbine system.

H. Sintra; V.M.F. Mendes; R. Melcio

2014-01-01T23:59:59.000Z

296

Computer Simulation of Cooling Effect of Wind Tower on Passively Ventilated Building  

E-Print Network (OSTI)

, the placement of the wind tower opening and air inlets into the building should be considered. Finally, the model should include energy storage effects in the thermal mass of the building. Perhaps the best way to incorporate all of these issues into a..., the placement of the wind tower opening and air inlets into the building should be considered. Finally, the model should include energy storage effects in the thermal mass of the building. Perhaps the best way to incorporate all of these issues into a...

Seryak, J.; Kissock, J. K.

2002-01-01T23:59:59.000Z

297

Application of the antenna theory model to a tall tower struck by Behzad Kordi,1,2  

E-Print Network (OSTI)

on the lightning flash parameters. However, the presence of a vertically extended and grounded strike objectApplication of the antenna theory model to a tall tower struck by lightning Behzad Kordi,1] The interaction of lightning with the 553-m high CN Tower in Toronto is modeled using the antenna theory model

Florida, University of

298

Manuscript received for review, February 2008; accepted for publication, SIX CENTURIES OF FIRE HISTORY AT DEVILS TOWER  

E-Print Network (OSTI)

Willson Great Plains CESU, 515 Hardin Hall University of Nebraska­Lincoln 3310 Holdrege, Lincoln, NE 68583­climate relationships derived from Devils Tower, the Black Hills, and other Great Plains sites suggest that Devils Tower and vegetation assessments suggest that conditions are departed from historical conditions. In the Great Plains

Stambaugh, Michael C

299

NREL: Concentrating Solar Power Research - Publications  

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

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

300

A method to avoid negative damped low frequent tower vibrations for a floating, pitch controlled wind turbine  

Science Journals Connector (OSTI)

Wind turbines mounted on floating platforms is subjected to completely different and soft foundation properties, than seen for onshore wind turbines. This leads to much lower natural frequencies, related to the rigid body motion of the structure which again leads to an unfavorable coupling between tower motion and the pitch control of the turbine. The tower motion in combination with the aerodynamics and the pitch control will be poor or even negative damped which causes large transient loads if not accounted for. The reason for this low damping is shown to be caused by a too fast pitch regulation compared to the motion of the tower or in other words the lowest control-structure natural frequency must be lower than the lowest critical tower frequency. A control algorithm is presented including the tuning method (pole-placement) to ensure the desired control frequency which provides stable tower vibration modes.

T J Larsen; T D Hanson

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "reflector power tower" 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

7/4/2014 Will TinyWindmills Power Your Future Smartphone? -FUTURESCOPE http://futurescope.co/post/73321275992/will-tiny-windmills-power-your-future-smartphone 1/4  

E-Print Network (OSTI)

? txchnologist: by Michael Keller In the world of wind power generation, there are mills that tower 360 feet txchnologist Tags: future tech power windmills smartphone wearables wind power Notes 1. dystopia3 likes this 2 by HYPERMORGEN INTERACTION About Get the RSS Browse the Archive Random post Submit Ask me anything Follow us

Chiao, Jung-Chih

302

Stress resultants in hyperboloid cooling tower shells subjected to foundation settlement  

SciTech Connect

The effect of differential settlement of columns supporting a natural draught hyperboloid cooling tower on the stress resultants in the tower shell is analyzed using discrete finite element modelling of the shell and the supporting base. The quadrilateral facet shell elements and 3-D beam elements are used to model the shell and the columns respectively. The stress resultants obtained due to an imposed settlement are compared with those reported earlier by other investigators. In the existing literature, the stress resultants are found using the Boussinesq equation to calculate the approximate edge loading (column forces) on the cooling tower shell due to differential settlement. It is shown in the present study that using the Boussinesq solution for the calculation of edge loading may lead to an over-estimation of the column forces and hence the stress resultants. The magnitude of stress resultants is also found to be dependent on the column flexibility. The paper also presents an investigation in which the local amplification of stress resultants in the vicinity of the shell column junction of the cooling towers (stress concentration) due to dead load and foundation settlement is studied. It is shown that the stress concentration can be severe, i.e., up to seven times the average stress resultants for dead load, and up to five times the average stress resultants for the foundation settlement. 28 refs.

Krishna Mohan Rao, S.V.; Appa Rao, T.V.S.R. [CSIR Campus, Madras (India)

1994-08-01T23:59:59.000Z

303

Behavior of Scaled Steel-Concrete Composite Girders and Steel Monopole Towers Strengthened with CFRP  

E-Print Network (OSTI)

Behavior of Scaled Steel-Concrete Composite Girders and Steel Monopole Towers Strengthened with CFRP DAVID SCHNERCH AND SAMI RIZKALLA Cost-effective rehabilitation and/or strengthening of steel. The current research program makes use of new high modulus types of carbon fiber for strengthening steel

304

Top: Rudder Tower is one of 24 Texas A&M buildings undergoing energy efficiency upgrades.  

E-Print Network (OSTI)

Top: Rudder Tower is one of 24 Texas A&M buildings undergoing energy efficiency upgrades. Bottom control energy costs and provide a greener, more energy efficient campus for a more environmentally' building automation system (BAS) will improve energy efficiency and enable better HVAC control in buildings

305

Comparison of linear and nonlinear responses of a compliant tower to random wave forces  

E-Print Network (OSTI)

. Introduction A compliant tower is an offshore structure used in the oil industry as an exploratory, production offshore structure is modeled as a beam undergoing both bending and extension. The beam has a point mass. A quarter of the International Ship and Offshore Structures Congress (ISSC) tension leg platform model

Benaroya, Haym

306

Experimental Study on Energy Efficiency of Heat-source Tower Heat Pump Units in Winter Condition  

Science Journals Connector (OSTI)

Building energy consumption in China has been increasing rapidly. And a small increase in the operation efficiency of the air-conditioning system can substantially decrease it. In this paper a new type heat pump is developed to improve the performance ... Keywords: Heat-source tower, Heat pump, Seasonal energy efficiency ratio(SEER), Hermal properties

Li Nianping; Zhang Wenjie; Wang Lijie; Liu Qiuke; Hu Jinhua

2011-01-01T23:59:59.000Z

307

Blandford MTA Tower Wind Monitoring This document provides information not repeated in the monthly wind monitoring  

E-Print Network (OSTI)

on a regular basis. The logger samples wind speed and direction once every two seconds. These are then combined applicable): wind speed, wind speed standard deviation, wind direction, temperature, and solar insolation. F1 ranges applied for high and low wind speeds. A wind direction standard Blandford MTA Tower Wind

Massachusetts at Amherst, University of

308

Marion Meteorological Tower Wind Monitoring This document provides information not repeated in the monthly wind monitoring  

E-Print Network (OSTI)

. The logger samples wind speed and direction once every two seconds. These are then combined into 10-minute): wind speed, wind speed standard deviation, wind direction, temperature, and solar insolation. F1 > TF1 applied for high and low wind speeds. A wind direction standard Marion Met Tower Wind Monitoring #12

Massachusetts at Amherst, University of

309

Monte Carlo analysis of a monolithic interconnected module with a back surface reflector  

SciTech Connect

Recently, the photon Monte Carlo code, RACER-X, was modified to include wave-length dependent absorption coefficients and indices of refraction. This work was done in an effort to increase the code`s capabilities to be more applicable to a wider range of problems. These new features make RACER-X useful for analyzing devices like monolithic interconnected modules (MIMs) which have etched surface features and incorporates a back surface reflector (BSR) for spectral control. A series of calculations were performed on various MIM structures to determine the impact that surface features and component reflectivities have on spectral utilization. The traditional concern of cavity photonics is replaced with intra-cell photonics in the MIM design. Like the cavity photonic problems previously discussed, small changes in optical properties and/or geometry can lead to large changes in spectral utilization. The calculations show that seemingly innocuous surface features (e.g., trenches and grid lines) can significantly reduce the spectral utilization due to the non-normal incident photon flux. Photons that enter the device through a trench edge are refracted onto a trajectory where they will not escape. This leads to a reduction in the number of reflected below bandgap photons that return to the radiator and reduce the spectral utilization. In addition, trenches expose a lateral conduction layer in this particular series of calculations which increase the absorption of above bandgap photons in inactive material.

Ballinger, C.T.; Charache, G.W. [Lockheed Martin Corp., Schenectady, NY (United States); Murray, C.S. [Bettis Atomic Power Lab., West Mifflin, PA (United States)

1998-10-01T23:59:59.000Z

310

EIS-0077-S: Bonneville Power Administration Crow Butte Slough Crossing  

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

The Bonneville Power Administration developed this SEIS to evaluate potential impacts resulting from construction of a 4,700 -foot segment of the Ashe-Slatt transmission line at Crow Butte Slough, overhead on towers on the existing right-of-way. This SEIS is a supplement to DOE/EIS-0077, Ashe-Slatt (Pebble Springs) 500-kilovolt Transmission Line.

311

Linear Concentrator System Basics for Concentrating Solar Power |  

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

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

312

Effect of internal stiffening rings and wall thickness on the structural response of steel wind turbine towers  

Science Journals Connector (OSTI)

Abstract In this paper, the structural response of steel tubular wind turbine towers with various design configurations is analysed using FEM modelling. Towers of various heights between 50 and 250m are considered and investigated with three different design options as follows: (i) thick walled tower with internal horizontal stiffening rings, (ii) thick walled tower without stiffening rings and (iii) thin walled tower with stiffening rings. Based on this analysis, weight reduction ratios are examined in relation to the horizontal sway and von Mises stress increase ratios in order to identify a more efficient design approach between reducing the wall thickness and adopting internal stiffeners. All studied design solutions satisfy the strength and serviceability requirements as specified by the design codes of practice. In the final part of paper, the dynamic characteristics of these three types of towers have been examined to obtain the natural frequencies and mode shapes. The studied model ignored the mass of nacelle-rotor system and the wind turbines, namely, only the isolated tower was included. Furthermore, the recommendations to avoid resonance for each height case are proposed.

Y. Hu; C. Baniotopoulos; J. Yang

2014-01-01T23:59:59.000Z

313

Geothermal/Power Plant | Open Energy Information  

Open Energy Info (EERE)

Geothermal/Power Plant Geothermal/Power Plant < Geothermal(Redirected from Power Plant) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Land Use Leasing Exploration Well Field Power Plant Transmission Environment Water Use Print PDF Geothermal Power Plants General List of Plants Map of Plants Regulatory Roadmap NEPA (19) Binary power system equipment and cooling towers at the ORMAT Ormesa Geothermal Power Complex in Southern California. Geothermal Power Plants discussion Electricity Generation Converting the energy from a geothermal resource into electricity is achieved by producing steam from the heat underground to spin a turbine which is connected to a generator to produce electricity. The type of energy conversion technology that is used depends on whether the resource is predominantly water or steam, the temperature of the resource, and the

314

Concentrating solar power | Open Energy Information  

Open Energy Info (EERE)

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

315

NREL: TroughNet - Parabolic Trough Power Plant System Technology  

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

Parabolic Trough Power Plant System Technology Parabolic Trough Power Plant System Technology A parabolic trough solar power plant uses a large field of collectors to supply thermal energy to a conventional power plant. Because they use conventional power cycles, parabolic trough power plants can be hybridized-other fuels can be used to back up the solar power. Like all power cycles, trough power plants also need a cooling system to transfer waste heat to the environment. Parabolic trough power plant technologies include: Direct steam generation Fossil-fired (hybrid) backup Operation and maintenance Power cycles Steam Rankine Organic Rankine Combined Wet and dry cooling Power Cycles A photo of an aerial view of a power plant in the middle of a solar field with rows and rows of parabolic troughs tracking. The cooling towers can be seen with the water plume rising into the air. The white water tanks can be seen in the background.

316

High Energy Gamma-Ray Observations of the Crab Nebula and Pulsar with the Solar Tower Atmospheric Cherenkov Effect Experiment  

E-Print Network (OSTI)

The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is a new ground-based atmospheric Cherenkov telescope for gamma-ray astronomy. STACEE uses the large mirror area of a solar heliostat facility to achieve a low energy threshold. A prototype experiment which uses 32 heliostat mirrors with a total mirror area of ~ 1200\\unit{m^2} has been constructed. This prototype, called STACEE-32, was used to search for high energy gamma-ray emission from the Crab Nebula and Pulsar. Observations taken between November 1998 and February 1999 yield a strong statistical excess of gamma-like events from the Crab, with a significance of $+6.75\\sigma$ in 43 hours of on-source observing time. No evidence for pulsed emission from the Crab Pulsar was found, and the upper limit on the pulsed fraction of the observed excess was E_{th}) = (2.2 \\pm 0.6 \\pm 0.2) \\times 10^{-10}\\unit{photons cm^{-2} s^{-1}}. The observed flux is in agreement with a continuation to lower energies of the power law spectrum seen at TeV energies.

STACEE Collaboration; S. Oser; D. Bhattacharya; L. M. Boone; M. C. Chantell; Z. Conner; C. E. Covault; M. Dragovan; P. Fortin; D. T. Gregorich; D. S. Hanna; R. Mukherjee; R. A. Ong; K. Ragan; R. A. Scalzo; D. R. Schuette; C. G. Theoret; T. O. Tumer; D. A. Williams; J. A. Zweerink

2000-06-21T23:59:59.000Z

317

Effects of adding wash tower effluent to Ano Liossia landfill to enhance bioreaction c by Olympia Galenianou.  

E-Print Network (OSTI)

A theoretical study was performed on the effects of adding sulfate-rich wash tower effluent from the Athens hospital waste incinerator to the Ano Liossia landfill of Athens. The method of mass balance was used to examine ...

Galenianou, Olympia

2006-01-01T23:59:59.000Z

318

Energy Savings Accomplished by Replacing Steam Ejectors with Electric Driven Vacuum Pumps in Crude Distillation Vacuum Towers  

E-Print Network (OSTI)

The low cost of steam combined with the maintenance free operation of steam ejectors has assured their unquestioned use in providing the necessary vacuum for crude distillation vacuum towers. However, the cost of steam production has risen...

Nelson, R. E.

1982-01-01T23:59:59.000Z

319

Stability and Turbulence in the Atmospheric Boundary Layer: A Comparison of Remote Sensing and Tower Observations  

SciTech Connect

When monitoring winds and atmospheric stability for wind energy applications, remote sensing instruments present some advantages to in-situ instrumentation such as larger vertical extent, in some cases easy installation and maintenance, measurements of vertical humidity profiles throughout the boundary layer, and no restrictions on prevailing wind directions. In this study, we compare remote sensing devices, Windcube lidar and microwave radiometer, to meteorological in-situ tower measurements to demonstrate the accuracy of these measurements and to assess the utility of the remote sensing instruments in overcoming tower limitations. We compare temperature and wind observations, as well as calculations of Brunt-Vaisala frequency and Richardson numbers for the instrument deployment period in May-June 2011 at the U.S. Department of Energy National Renewable Energy Laboratory's National Wind Technology Center near Boulder, Colorado. The study reveals that a lidar and radiometer measure wind and temperature with the same accuracy as tower instruments, while also providing advantages for monitoring stability and turbulence. We demonstrate that the atmospheric stability is determined more accurately when the liquid-water mixing ratio derived from the vertical humidity profile is considered under moist-adiabatic conditions.

Friedrich, K.; Lundquist, J. K.; Aitken, M.; Kalina, E. A.; Marshall, R. F.

2012-01-01T23:59:59.000Z

320

2014-12-30 Issuance: Energy Conservation Standard for General Service Fluorescent Lamps and Incandescent Reflector Lamps; Final Rule  

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

This document is a pre-publication Federal Register final rule regarding energy conservation standards for general service fluorescent lamps and incandescent reflector lamps, as issued by the Deputy Assistant Secretary for Energy Efficiency on December 30, 2014. Though it is not intended or expected, should any discrepancy occur between the document posted here and the document published in the Federal Register, the Federal Register publication controls. This document is being made available through the Internet solely as a means to facilitate the public's access to this document.

Note: This page contains sample records for the topic "reflector power tower" 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

Wind for Schools Project Power System Brief, Wind Powering America Fact Sheet Series  

Wind Powering America (EERE)

Powering America Fact Sheet Series Powering America Fact Sheet Series Energy Efficiency & Renewable Energy Wind for Schools Project Power System Brief Wind for Schools Project Power System Brief Wind for Schools Project Power System Brief This fact sheet provides an overview of the system components of a Wind Powering America Wind for Schools project. Wind Powering America's (WPA's) Wind for Schools project uses a basic system configuration for each school project. The system incorporates a single SkyStream(tm) wind turbine, a 70-ft guyed tower, disconnect boxes at the base of the turbine and at the school, and an interconnection to the school's electrical system. A detailed description of each system component is provided in this document. The local power cooperative or utility should be an integral part of

322

Hypermodular Self-Assembling Space Solar Power -- Design Option for Mid-Term GEO Utility-Scale Power Plants  

E-Print Network (OSTI)

This paper presents a design for scaleable space solar power systems based on free-flying reflectors and module self-assembly. Lower system cost of utility-scale space solar power is achieved by design independence of yet-to-be-built in-space assembly or transportation infrastructure. Using current and expected near-term technology, this study describe a design for mid-term utility-scale power plants in geosynchronous orbits. High-level economic considerations in the context of current and expected future launch costs are given as well.

Leitgab, Martin

2013-01-01T23:59:59.000Z

323

CFD analysis for solar chimney power plants  

Science Journals Connector (OSTI)

Abstract Solar chimney power plants are investigated numerically using ANSYS Fluent and an in-house developed Computational Fluid Dynamics (CFD) code. Analytical scaling laws are verified by considering a large range of scales with tower heights between 1m (sub-scale laboratory model) and 1000m (largest envisioned plant). A model with approximately 6m tower height is currently under construction at the University of Arizona. Detailed time-dependent high-resolution simulations of the flow in the collector and chimney of the model provide detailed insight into the fluid dynamics and heat transfer mechanisms. Both transversal and longitudinal convection rolls are identified in the collector, indicating the presence of a RayleighBnardPoiseuille instability. Local separation is observed near the chimney inflow. The flow inside the chimney is fully turbulent.

Hermann F. Fasel; Fanlong Meng; Ehsan Shams; Andreas Gross

2013-01-01T23:59:59.000Z

324

Solar passive ceiling system. Final report. [Passive solar heating system with venetian blind reflectors and latent heat storage in ceiling  

SciTech Connect

The construction of a 1200 square foot building, with full basement, built to be used as a branch library in a rural area is described. The primary heating source is a passive solar system consisting of a south facing window system. The system consists of: a set of windows located in the south facing wall only, composed of double glazed units; a set of reflectors mounted in each window which reflects sunlight up to the ceiling (the reflectors are similar to venetian blinds); a storage area in the ceiling which absorbs the heat from the reflected sunlight and stores it in foil salt pouches laid in the ceiling; and an automated curtain which automatically covers and uncovers the south facing window system. The system is totally passive and uses no blowers, pumps or other active types of heat distribution equipment. The building contains a basement which is normally not heated, and the north facing wall is bermed four feet high around the north side.

Schneider, A.R.

1980-01-01T23:59:59.000Z

325

Solar Power Potential in SE New Mexico  

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

Solar Power Potential in Southeast New Mexico Solar Power Potential in Southeast New Mexico Solar Power Project Opportunities Abound in the Region The WIPP site is receives abundant solar energy with 6-7 kWh/sq meter power production potential As the accompanying map of New Mexico shows, the WIPP site enjoys abundant year-round sunshine. With an average solar power production potential of 6-7 kWh/sq meter per day, one exciting project being studied for location at WIPP is a 30-50 MW Solar Power Tower: The American Solar Energy Society (ASES) is is a national trade association promoting solar energy as a clean source of electricity, and provides a comprehensive resource for additional information. DOE's Office of Energy Efficiency and Renewable Energy is also a comprehensive resource for more information on renewable energy.

326

Geothermal/Power Plant | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Geothermal/Power Plant < Geothermal Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Land Use Leasing Exploration Well Field Power Plant Transmission Environment Water Use Print PDF Geothermal Power Plants General List of Plants Map of Plants Regulatory Roadmap NEPA (20) Binary power system equipment and cooling towers at the ORMAT Ormesa Geothermal Power Complex in Southern California. Geothermal Power Plants discussion Electricity Generation Converting the energy from a geothermal resource into electricity is achieved by producing steam from the heat underground to spin a turbine

327

U.S. Department of Energy Southwestern Power Admin  

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

Admin Admin istration Categorical Exclusion Determination Form Proposed Action Title: Moodys Radio Tower Land Acquisition Program or Field Office: Southwestern Power Administration Location(s) (City/County/State): Moodys, Cherokee County, Oklahoma Proposed Action Description: Southwestern Power Administration proposes to obtain title, in fee, for a portion of land at the Southwestern Power Administration Moody Radio Tower site. Categorical Exclusion(s) Applied: I 0 CFR 1021, Appendix B to Subpart D, Part B 1.24- Transfer, lease, disposition, or acquisition of interests in personal property or real property. For the complete DOE National Environmental Policy Act regulations regarding categorical exclusions, including the full text of each categorical exclusion, see Subpart D of 10 CFR Part 1021

328

Wind for Schools Project Power System Brief  

SciTech Connect

This fact sheet provides an overview of the system components of a Wind Powering America Wind for Schools project. Wind Powering America's (WPA's) Wind for Schools project uses a basic system configuration for each school project. The system incorporates a single SkyStream(TM) wind turbine, a 70-ft guyed tower, disconnect boxes at the base of the turbine and at the school, and an interconnection to the school's electrical system. A detailed description of each system component is provided in this document.

Not Available

2007-08-01T23:59:59.000Z

329

Accelerated aging of thick glass second surface silvered reflectors under sandstorm conditions.  

E-Print Network (OSTI)

?? Concentrated solar power systems are expected to be sited in desert locations where the direct normal irradiation is above 1800 kWh/m2.year. These systems include (more)

Caron, Simon

2011-01-01T23:59:59.000Z

330

High power water load for microwave and millimeter-wave radio frequency sources  

DOE Patents (OSTI)

A high power water load for microwave and millimeter wave radio frequency sources has a front wall including an input port for the application of RF power, a cylindrical dissipation cavity lined with a dissipating material having a thickness which varies with depth, and a rear wall including a rotating reflector for the reflection of wave energy inside the cylindrical cavity. The dissipation cavity includes a water jacket for removal of heat generated by the absorptive material coating the dissipation cavity, and this absorptive material has a thickness which is greater near the front wall than near the rear wall. Waves entering the cavity reflect from the rotating reflector, impinging and reflecting multiple times on the absorptive coating of the dissipation cavity, dissipating equal amounts of power on each internal reflection.

Ives, R. Lawrence (Saratoga, CA); Mizuhara, Yosuke M. (Palo Alto, CA); Schumacher, Richard V. (Sunnyvale, CA); Pendleton, Rand P. (Saratoga, CA)

1999-01-01T23:59:59.000Z

331

Low Wind Speed Technology Phase I: Evaluation of Design and Construction Approaches for Economical Hybrid Steel/Concrete Wind Turbine Towers; BERGER/ABAM Engineers Inc.  

SciTech Connect

This fact sheet describes a subcontract with BERGER/ABAM Engineers Inc. to study the economic feasibility of concrete and hybrid concrete/steel wind turbine towers.

Not Available

2006-03-01T23:59:59.000Z

332

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network (OSTI)

been heated at solar collection tower, at the temperatureIn the receiver tower, the collected solar radiation heatsfocus and send solar radiation to a receiver tower.

Roshandell, Melina

2013-01-01T23:59:59.000Z

333

A Single Tower Configuration of the Modular Gamma Box Counter System - 13392  

SciTech Connect

Canberra's Standard Gamma Box Counter System is designed to perform accurate quantitative assays of gamma emitting nuclides for a wide range of large containers including B-25 crates and ISO shipping containers. Using a modular building-block approach, the system offers tremendous flexibility for a variety of measurement situations with wide ranges of sample activities and throughput requirements, as well as the opportunity to modify the configuration for other applications at a later date. The typical configuration consists of two opposing towers each equipped with two high purity germanium detectors, and an automated container trolley. This paper presents a modified configuration, consisting of a single tower placed inside a measurement trailer with three detector assemblies, allowing for additional vertical segmentation as well as a viewing a container outside the trailer through the trailer wall. An automatic liquid nitrogen fill system is supplied for each of the detectors. The use of a forklift to move the container for horizontal segmentation is accommodated by creating an additional operational and calibration set-up in the NDA 2000 software to allow for the operator to rotate the container and assay the opposite side, achieving the same sensitivity as a comparable two-tower system. This Segmented Gamma Box Counter System retains the core technologies and design features of the standard configuration. The detector assemblies are shielded to minimize interference from environmental and plant background, and are collimated to provide segmentation of the container. The assembly positions can also be modified in height and distance from the container. The ISOCS calibration software provides for a flexible approach to providing the calibrations for a variety of measurement geometries. The NDA 2000 software provides seamless operation with the current configuration, handling the data acquisition and analysis. In this paper, an overview of this system is discussed, along with the measured performance results, calibration methodology and verification, and minimum detectable activity levels. (authors)

Morris, K.; Nakazawa, D.; Francalangia, J.; Gonzalez, H. [Canberra Industries Inc., 800 Research Parkway, Meriden, CT, 06450 (United States)] [Canberra Industries Inc., 800 Research Parkway, Meriden, CT, 06450 (United States)

2013-07-01T23:59:59.000Z

334

Recent AGN Observations by the Solar Tower Atmospheric Cherenkov Effect Experiment  

Science Journals Connector (OSTI)

The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is a ground?based atmospheric Cherenkov telescope for the detection of very high energy gamma rays from Galactic and extra?galactic sources. By utilizing the large collection area provided by the solar mirrors of the National Solar Thermal Test Facility in Albuquerque New Mexico STACEE achieves a low energy threshold around 100 GeV for the detection of gamma rays. We briefly describe the STACEE detector and detail recent observations of Active Galactic Nuclei.

J. Kildea; A. Alabiso; D. A. Bramel; J. Carson; C. E. Covault; D. Driscoll; P. Fortin; D. M. Gingrich; D. S. Hanna; A. Jarvis; T. Lindner; R. Mukherjee; C. Mueller; R. A. Ong; R. A. Scalzo; D. A. Williams; J. Zweerink

2005-01-01T23:59:59.000Z

335

A review of "Control of Religious Printing in Early Stuart England." by S. Mutchow Towers  

E-Print Network (OSTI)

attempts to break out of the rigid framework that Dutch iconography imposes. Therefore, the purpose of this book has not entirely become clear. One reason why the book?s purpose remains partly obscure lies in the author?s heavy dependence on texts... tradition of love imagery that the book precisely does not address. S. Mutchow Towers. Control of Religious Printing in Early Stuart England. Woodbridge, U.K.: The Boydell Press, 2003. viii + 296 pp. $75.00. Review by STEVEN MATTHEWS, THE UNIVERSITY...

Steven Matthews

2004-01-01T23:59:59.000Z

336

GEOTHERMAL POWER GENERATION PLANT  

SciTech Connect

Oregon Institute of Technology (OIT) drilled a deep geothermal well on campus (to 5,300 feet deep) which produced 196oF resource as part of the 2008 OIT Congressionally Directed Project. OIT will construct a geothermal power plant (estimated at 1.75 MWe gross output). The plant would provide 50 to 75 percent of the electricity demand on campus. Technical support for construction and operations will be provided by OITs Geo-Heat Center. The power plant will be housed adjacent to the existing heat exchange building on the south east corner of campus near the existing geothermal production wells used for heating campus. Cooling water will be supplied from the nearby cold water wells to a cooling tower or air cooling may be used, depending upon the type of plant selected. Using the flow obtained from the deep well, not only can energy be generated from the power plant, but the waste water will also be used to supplement space heating on campus. A pipeline will be construction from the well to the heat exchanger building, and then a discharge line will be construction around the east and north side of campus for anticipated use of the waste water by facilities in an adjacent sustainable energy park. An injection well will need to be drilled to handle the flow, as the campus existing injection wells are limited in capacity.

Boyd, Tonya

2013-12-01T23:59:59.000Z

337

Diversion assumptions for high-powered research reactors  

SciTech Connect

This study deals with diversion assumptions for high-powered research reactors -- specifically, MTR fuel; pool- or tank-type research reactors with light-water moderator; and water, beryllium, or graphite reflectors, and which have a power level of 25 MW(t) or more. The objective is to provide assistance to the IAEA in documentation of criteria and inspection observables related to undeclared plutonium production in the reactors described above, including: criteria for undeclared plutonium production, necessary design information for implementation of these criteria, verification guidelines including neutron physics and heat transfer, and safeguards measures to facilitate the detection of undeclared plutonium production at large research reactors.

Binford, F.T.

1984-01-01T23:59:59.000Z

338

NREL: Concentrating Solar Power Research - Laboratory Capabilities  

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

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

339

Vertical cavity surface emitting laser emitting at 1.56 microns with AlGaAsSb/AlAsSb distributed Bragg reflectors  

SciTech Connect

The authors report 77K operation of an optically pumped vertical cavity surface emitting laser with an Sb-based cavity. The structure consists of 15 and 20 pair AlGaAsSb/AlAsSb top and bottom reflectors and a bulk InGaAs active region.

Blum, O.; Klem, J.F.; Lear, K.L.; Vawter, G.A.; Kurtz, S.R.

1998-07-01T23:59:59.000Z

340

Efficient directional spontaneous emission from an InGaAs/InP heterostructure with an integral parabolic reflector  

SciTech Connect

In order to increase the radiative efficiency and directivity of spontaneous emission from a lattice-matched InGaAs/InP heterostructure, we have polished the substrate into a parabolic reflector. We combine optical and thermal measurements to obtain the absolute external efficiency over a wide range of carrier densities. Using a simple model, the measurement is used to determine interface, radiative, and Auger recombination rates in the active material. At the optimal density, the quantum efficiency exceeds 60{percent} at room temperature. The divergence of the emitted light is less than 20{degree}. In fact, the beam profile is dominated by a 6{degree} wide lobe that can be swept across the field of emission by changing the excitation position. This suggests a way to create an all-electronic scanned light beam. {copyright} {ital 1998 American Institute of Physics.}

Gfroerer, T.H.; Cornell, E.A. [JILA, National Institute of Standards and Technology and University of Colorado, and Department of Physics, University of Colorado, Boulder, Colorado, 80309-0440 (United States)] [JILA, National Institute of Standards and Technology and University of Colorado, and Department of Physics, University of Colorado, Boulder, Colorado, 80309-0440 (United States); Wanlass, M.W. [National Renewable Energy Laboratory, Golden, Colorado, 80401 (United States)] [National Renewable Energy Laboratory, Golden, Colorado, 80401 (United States)

1998-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "reflector power tower" 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

Electromagnetic modeling of the energy distribution of a metallic cylindrical parabolic reflector covered with a magnetized plasma layer  

SciTech Connect

The energy distribution along the focal axis of a long metallic cylindrical parabolic reflector with a plasma layer on its surface in the presence of an external magnetic field is investigated. The effects of some physical parameters, such as the plasma frequency, the wave frequency and the thickness of plasma layer on the energy distribution and the reflected and transmitted electromagnetic fields, are simulated. These investigations for both S- and P-polarizations have been done separately. It is found that the maximum value of the reflected intensity increases by increasing the incident wave frequency and by decreasing the plasma layer thickness and the plasma frequency for both polarizations. Furthermore, the results show that the increase of the magnetic field strength can cause an increase in the reflected intensity for S-polarization and a slight decrease for P-polarization.

Niknam, A. R., E-mail: a-niknam@sbu.ac.ir; Khajehmirzaei, M. R. [Laser and Plasma Research Institute, Shahid Beheshti University, GC, Tehran (Iran, Islamic Republic of); Davoudi-Rahaghi, B.; Rahmani, Z.; Jazi, B.; Abdoli-Arani, A. [Department of Laser and Photonics, Faculty of Physics, University of Kashan, Kashan (Iran, Islamic Republic of)

2014-07-15T23:59:59.000Z

342

Deposition and corrosion phenomena on aluminum surfaces under deluged dry cooling-tower condisions. Interim report  

SciTech Connect

Deposition and corrosion on aluminum heat exchanger surfaces resulting from deluge in wet/dry cooling towers is simulated in a laboratory Corrosion/Deposition Loop (CDL). Heat exchanger deposition buildup was found to be linearly dependent on concentration factor and number of wet/dry cycles. Deionized water rising after deluge reduced rate of deposition. Laboratory data obtained from CDL relates directly to operation of the Advanced Concepts Test (ACT) demonstration cooling tower. Technology transferable to ACT shows that deposition from supersaturated solution can be effectively controlled by attention to water chemistry, pH, water conditioning, and good heat transfer design. The additional mechanism of deposition by water film evaporation is effectively managed by soft water rinsing and uniform surface wetting. Exposure of a model TRANE surface (the ACT wet/dry exchanger) produced short-term deposition extrapolating to 0.011 mm buildup in three years. Studies continue to verify 4X as maximum cycles of concentration through control of water chemistry and rinsing after deluge. Deluge water used at ACT facility is sufficiently aggressive to warrant use of Alclad to extend tube service life.

Wheeler, K.R.; May, R.P.; Douglas, J.G.; Tylczak, J.H.

1981-07-01T23:59:59.000Z

343

Comparison of Triton SODAR Data to Meteorological Tower Wind Measurement Data in Hebei Province, China  

SciTech Connect

With the increased interest in remote sensing of wind information in recent years, it is important to determine the reliability and accuracy of new wind measurement technologies if they are to replace or supplement conventional tower-based measurements. In view of this, HydroChina Corporation and the United States National Renewable Energy Laboratory (NREL) conducted a comparative test near a wind farm in Hebei Province, China. We present the results of an analysis characterizing the measurement performance of a state-of-the-art Sound Detection and Ranging (sodar) device when compared to a traditional tower measurement program. NREL performed the initial analysis of a three-month period and sent the results to HydroChina. When another month of data became available, HydroChina and their consultant Beijing Millenium Engineering Software (MLN) repeated NREL's analysis on the complete data set, also adding sensitivity analysis for temperature, humidity, and wind speed (Section 6). This report presents the results of HydroChina's final analysis of the four-month period.

Yuechun, Y.; Jixue, W.; Hongfang, W.; Guimin, L.; Bolin, Y.; Scott, G.; Elliott, D.; Kline, D.

2012-01-01T23:59:59.000Z

344

Power Plant Power Plant  

E-Print Network (OSTI)

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

Tingley, Joseph V.

345

Optical characterization of the facets of a heliostat J. A. Avellaner  

E-Print Network (OSTI)

169 Optical characterization of the facets of a heliostat J. A. Avellaner INITEC, Energia, Madrid the heliostat reflector panels (facets) of a central tower type solar power station from an optical point to both the selecting process of heliostat components and manufacturing procedures. Revue Phys. Appl.15

Paris-Sud XI, Université de

346

Power Factor Reactive Power  

E-Print Network (OSTI)

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

347

Ytterbium-doped fibre laser with a Bragg grating reflector written in a multimode fibre  

SciTech Connect

An efficient cladding-pumped Yb-doped fibre laser with a Bragg grating written in a multimode graded-index fibre is fabricated for the first time. The laser emits one transverse mode with a slope efficiency of 60%. The resonator design proposed in the paper can be used for the development of high-power fibre lasers with an increased fibre core diameter. (lasers)

Kurkov, Andrei S; Grukh, Dmitrii A; Medvedkov, O I; Paramonov, Vladimir M; Dianov, Evgenii M [Fiber Optics Research Center, Russian Academy of Sciences, Moscow (Russian Federation)

2005-04-30T23:59:59.000Z

348

Project Profile: Low-Cost Self-Cleaning Reflector Coatings for CSP Collectors  

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

The Oak Ridge National Laboratory (ORNL), under the National Laboratory R&D competitive funding opportunity, is developing self-cleaning, optically transparent coatings that can be applied to the surfaces of heliostats and collector mirrors in concentrating solar power (CSP) systems. The coatings can help to achieve the SunShot Initiative cost goals by reducing the time and costs associated with cleaning collector and heliostat mirror surfaces and increasing the reliability and efficiency of CSP systems.

349

Energy 101: Concentrating Solar Power | Department of Energy  

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

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

350

NREL: Concentrating Solar Power Research - Projects  

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

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

351

Categorical Exclusion Determinations: Bonneville Power Administration |  

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

March 10, 2011 March 10, 2011 CX-005419: Categorical Exclusion Determination Ostrander Line Swap CX(s) Applied: B4.11 Date: 03/10/2011 Location(s): Clackamas County, Oregon Office(s): Bonneville Power Administration March 7, 2011 CX-005418: Categorical Exclusion Determination Birch Creek Radio Tower CX(s) Applied: B4.6 Date: 03/07/2011 Location(s): Bonneville County, Idaho Office(s): Bonneville Power Administration March 7, 2011 CX-005417: Categorical Exclusion Determination Beaver Creek Property CX(s) Applied: B1.25 Date: 03/07/2011 Location(s): Okanogan County, Washington Office(s): Bonneville Power Administration March 3, 2011 CX-005411: Categorical Exclusion Determination Troutdale Substation Control House CX(s) Applied: B1.3 Date: 03/03/2011 Location(s): Troutdale, Oregon Office(s): Bonneville Power Administration

352

Solar-Augment Potential of U.S. Fossil-Fired Power Plants  

SciTech Connect

Concentrating Solar Power (CSP) systems utilize solar thermal energy for the generation of electric power. This attribute makes it relatively easy to integrate CSP systems with fossil-fired power plants. The 'solar-augment' of fossil power plants offers a lower cost and lower risk alternative to stand-alone solar plant construction. This study ranked the potential to add solar thermal energy to coal-fired and natural gas combined cycle (NGCC) plants found throughout 16 states in the southeast and southwest United States. Each generating unit was ranked in six categories to create an overall score ranging from Excellent to Not Considered. Separate analysis was performed for parabolic trough and power tower technologies due to the difference in the steam temperatures that each can generate. The study found a potential for over 11 GWe of parabolic trough and over 21 GWe of power tower capacity. Power towers offer more capacity and higher quality integration due to the greater steam temperatures that can be achieved. The best sites were in the sunny southwest, but all states had at least one site that ranked Good for augmentation.

Turchi, C.; Langle, N.; Bedilion, R.; Libby, C.

2011-02-01T23:59:59.000Z

353

Department of Mechanical Engineering Spring 2010 Kenya Water Well Drill Rig Redesign of Engine Drive Train System & Support Tower  

E-Print Network (OSTI)

of Engine Drive Train System & Support Tower Overview The team was presented with the task of redesigning the engine drive train system and support structure for a water drill rig to be used in Kenya. The original engine drive train system was fabricated by a professional machinist and had many intricate components

Demirel, Melik C.

354

Long-Term Carbon Dioxide Fluxes from a Very Tall Tower in a Northern Forest: Flux Measurement Methodology  

Science Journals Connector (OSTI)

Methodology for determining fluxes of CO2 and H2O vapor with the eddy-covariance method using data from instruments on a 447-m tower in the forest of northern Wisconsin is addressed. The primary goal of this study is the validation of the methods ...

Bradford W. Berger; Kenneth J. Davis; Chuixiang Yi; Peter S. Bakwin; Cong Long Zhao

2001-04-01T23:59:59.000Z

355

A multi-site analysis of random error2 in tower-based measurements of carbon and energy fluxes3  

E-Print Network (OSTI)

1 A multi-site analysis of random error2 in tower-based measurements of carbon and energy fluxes3 4 MEASUREMENTS Richardson et al. 1 January 13, 2006 Abstract1 Measured surface-atmosphere fluxes of energy open-path, gas analyzer is22 used.23 #12;RANDOM ERRORS IN ENERGY AND CO2 FLUX MEASUREMENTS Richardson

356

Evidence of a Threshold Wind Speed in Tower-mounted Scatterometer Data David W. Draper and David G. Long  

E-Print Network (OSTI)

Evidence of a Threshold Wind Speed in Tower-mounted Scatterometer Data David W. Draper and David G ) in scatterom- eter measurements over water is theorized to go to zero below a threshold wind speed due. Evidence of the threshold wind speed and a hysteresis effect have been observed in airship and wave tank

Long, David G.

357

tall tower facility and instrumentation New coNstraiNts oN the Nitrous oxide budget of agricultural ecosystems  

E-Print Network (OSTI)

thick. The FAO classification is Chernozem. The field site has been under cultivation for the past 125. The tall tower source footprint is dominated by agricultural land use. The domi- nant crop types include measured at 100 m using a three dimensional sonic anemometer- thermometer for computation of energy, water

Minnesota, University of

358

SunShot Initiative: Advanced Nitrate Salt Central Receiver Power Plant  

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

Advanced Nitrate Salt Central Receiver Power Plant Advanced Nitrate Salt Central Receiver Power Plant Abengoa logo Photo of two lit towers surrounded by much smaller blue flat plates that are mounted on the ground. Commercial central receiver plant designs Abengoa, under the Baseload CSP FOA, will demonstrate a 100-megawatt electrical (MWe) central receiver plant using nitrate salt as the receiver coolant, thermal storage medium, and heat transport fluid in the steam generator. Approach The plan is to operate the plant at full load for 6,400 hours each year using only solar energy. Abengoa is working to create a team of suppliers capable of deploying a commercially ready nitrate salt central receiver technology that can be competitive in the current power marketplace. Innovation Abengoa is developing a new molten-salt power tower technology with a surround heliostat field. Key components include:

359

Raw Data from National Wind Technology Center M2 Tower (1996 - 2001) |  

Open Energy Info (EERE)

1996 - 2001) 1996 - 2001) Dataset Summary Description This raw data reflects readings from instruments mounted on or near a 82 meter meteorological tower located at the National Wind Technology Center (NWTC), approximately 5 miles south of Boulder, CO (specifically: 39.9107 N, 105.2348 W, datum WGS84). The base elevation at the site is 1,855 meters AMSL.The dataset includes irrandiance information (Global, kWs/m2) and meteorological data, such as temperature, pressure, and dew point, as well as wind speed and direction at 2m, 5m, 10m, 20m, 50m, and 80m. Included here is a portion of the available data: from September 23, 1996 - August 23, 2001. A separate dataset is available for Aug 24, 2001 - March 10, 2011 in OpenEI. The NWTC website provides current data (updated daily), from as early as August 24, 2001, as well as instrument specifications.

360

DOE/SC-ARM/TR-128 Tower Water-Vapor Mixing Ratio Value-Added  

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

8 8 Tower Water-Vapor Mixing Ratio Value-Added Product April 2013 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the U.S. Government or any agency thereof. The views and

Note: This page contains sample records for the topic "reflector power tower" 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

Raw Data from National Wind Technology Center M2 Tower (2001 - 2011) |  

Open Energy Info (EERE)

2001 - 2011) 2001 - 2011) Dataset Summary Description This raw data reflects readings from instruments mounted on or near a 82 meter meteorological tower located at the National Wind Technology Center (NWTC), approximately 5 miles south of Boulder, CO (specifically: 39.9107 N, 105.2348 W, datum WGS84). The base elevation at the site is 1,855 meters AMSL.The dataset includes irrandiance information, such as global PSP (W/m2) and meteorological data, such as temperature, pressure, and wind speed and direction (at 2m, 5m, 10m, 20m, 50m, and 80m). Included here is a portion of the available data: from August 24, 2001 - March 10, 2011. A separate dataset is available for the period between September 23, 1996 and August 23, 2001.The NWTC website provides up to the day updates to this data, from as early as August 24, 2001 through yesterday, as well as instrument specifications.

362

Fuzzy Logic Application for Optimization of the Cooling Towers Control System  

E-Print Network (OSTI)

The control system for the SPS-BA6 cooling towers station is considered in order to introduce the concept of a multivariable process. Multivariable control means the maintenace of several controlled variables at independent set points. In a single-variable system, to keep the single process variables within their critical values is considered a rather simple operation. In a complex multivariable system, the determination of the optimal operation point results in a combination of all set values of the variables. Control of a multivariable system requires therefore a more complex analysis. As the solution based on a mathematical model of the process is far beyond acceptable complexity, most mathematical models involve extensive simplifications and linearizations to optimize the resulting controllers. In this report the author will demonstrate how fuzzy logic might provide elegant and efficient solutions in the design of multivariable control based on experimental results rather than on mathematical models.

Blanc, D

2000-01-01T23:59:59.000Z

363

Prototype Test Results of the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE)  

E-Print Network (OSTI)

There are currently no experiments, either satellite or ground-based, that are sensitive to astrophysical gamma-rays at energies between 20 and 250 GeV. We are developing the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) to explore this energy range. STACEE will use heliostat mirrors at a solar research facility to collect Cherenkov light from extensive air showers produced by high energy gamma-rays. Here we report on the results of prototype test work at the solar facility of Sandia National Laboratories (Albuquerque, NM). The work demonstrates that the facility is suitable for use as an astrophysical observatory. In addition, using a full scale prototype of part of STACEE, we detected atmospheric Cherenkov radiation at energies lower than any other ground-based experiment to date.

STACEE Collaboration

1997-04-03T23:59:59.000Z

364

The Skycrane at the Bonneville Power Administration | Department of Energy  

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

The Skycrane at the Bonneville Power Administration The Skycrane at the Bonneville Power Administration The Skycrane at the Bonneville Power Administration August 2, 2010 - 10:44am Addthis Daniel B. Poneman Daniel B. Poneman Deputy Secretary of Energy What does this project do? The project is now on schedule and under budget. The Skycrane helped overcome challenging environmental conditions. It also made the work safer for workers on the ground. The project is expected to employ approximately 140 people at its peak. For a striking glimpse of a power grid rapidly evolving to handle renewable power, look to the Bonneville Power Administration in the Pacific Northwest. Crews just finished using a Skycrane helicopter to assemble 65 steel towers for a new high-voltage transmission line to move wind power throughout the region.

365

Coagulation/Flocculation Treatments for Flue-Gas-Derived Water from Oxyfuel Power Production with CO2 Capture  

Science Journals Connector (OSTI)

Coagulation/Flocculation Treatments for Flue-Gas-Derived Water from Oxyfuel Power Production with CO2 Capture ... The buffered solution is then sent back to the top of the tower, where it is sprayed into the upflowing oxyfuel gas stream, condensing and cleaning the ash-laden gas. ...

Sivaram Harendra; Danylo Oryshchyn; Thomas Ochs; Stephen Gerdemann; John Clark; Cathy Summers

2011-08-02T23:59:59.000Z

366

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

Science Journals Connector (OSTI)

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

K. Nithyanandam; R. Pitchumani

2014-01-01T23:59:59.000Z

367

Composition pulling effect and strain relief mechanism in AlGaN/AlN distributed Bragg reflectors  

SciTech Connect

We report on the composition pulling effect and strain relief mechanism in AlGaN/AlN distributed Bragg reflectors (DBRs) grown on GaN template/{alpha}-Al{sub 2}O{sub 3}(0001) by metal organic chemical vapor deposition. The reciprocal space mapping contours reveal that these DBRs are coherently grown. Cross-section transmission electron microscopy image of the AlGaN/AlN DBRs and the energy-dispersive x-ray analysis indicate that an AlGaN layer with gradient Al composition is located between the Al{sub 0.4}Ga{sub 0.6}N and AlN layers along the [0001] direction. It is attributed to the fact that Ga atoms in AlGaN are pulled and segregated to the upper layer by the strain. The density of strain energy is estimated to reduce more than one order by forming this quasi-three-sublayer structure comparing to the designed bi-sublayer structure.

Liu, B.; Zhang, R.; Ji, X. L.; Fu, D. Y.; Xie, Z. L.; Chen, D. J.; Chen, P.; Jiang, R. L.; Zheng, Y. D. [Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093 (China); Zheng, J. G. [California Institute for Telecommunications and Information Technology, University of California, Irvine, California 92697-2800 (United States)

2011-06-27T23:59:59.000Z

368

Fiber optic sensor employing successively destroyed coupled points or reflectors for detecting shock wave speed and damage location  

DOE Patents (OSTI)

A shock velocity and damage location sensor providing a means of measuring shock speed and damage location. The sensor consists of a long series of time-of-arrival "points" constructed with fiber optics. The fiber optic sensor apparatus measures shock velocity as the fiber sensor is progressively crushed as a shock wave proceeds in a direction along the fiber. The light received by a receiving means changes as time-of-arrival points are destroyed as the sensor is disturbed by the shock. The sensor may comprise a transmitting fiber bent into a series of loops and fused to a receiving fiber at various places, time-of-arrival points, along the receiving fibers length. At the "points" of contact, where a portion of the light leaves the transmitting fiber and enters the receiving fiber, the loops would be required to allow the light to travel backwards through the receiving fiber toward a receiving means. The sensor may also comprise a single optical fiber wherein the time-of-arrival points are comprised of reflection planes distributed along the fibers length. In this configuration, as the shock front proceeds along the fiber it destroys one reflector after another. The output received by a receiving means from this sensor may be a series of downward steps produced as the shock wave destroys one time-of-arrival point after another, or a nonsequential pattern of steps in the event time-of-arrival points are destroyed at any point along the sensor.

Weiss, Jonathan D. (Albuquerque, NM)

1995-01-01T23:59:59.000Z

369

Development of a straightness measurement and compensation system with multiple right-angle reflectors and a lead zirconate titanate-based compensation stage  

SciTech Connect

This paper presents a real-time straightness measurement and compensation system with an optical straightness measurement system and a single-axis flexure-hinge type lead zirconate titanate (PZT)-based compensation stage. The optical straightness measurement system consists of a He-Ne laser, a quadrant photodiode detector, and five right-angle reflectors. Multiple laser beam reflections between the right-angle reflectors increase the sensitivity of the straightness measurement by a factor of 6. The right-angle reflectors can be moved by the flexure-hinge type PZT-based compensation stage that is actuated by a PZT actuator to ensure that the laser beam is always projected onto the center of the quadrant detector. These two systems are integrated and fixed on a scanning stage. The resolution of the straightness measurement system is 0.1 {mu}m. Using the real-time straightness compensation system, the straightness error of the scanning stage is fed back to the control system. The compensated straightness error of the scanning stage system was reduced from 6.5 {mu}m to less than 1 {mu}m.

Liu, Chien-Hung; Chen, Jui-Hung [Institute of Electro-Optical and Materials Science, National Formosa University, Huwei, Yunlin 632, Taiwan (China); Teng, Yun-Feng [Department of Mechanical Engineering, National Chung-Cheng University, Chiayi 621, Taiwan (China)

2009-11-15T23:59:59.000Z

370

Categorical Exclusion Determinations: Bonneville Power Administration |  

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

April 9, 2013 April 9, 2013 CX-010153: Categorical Exclusion Determination Chinook Property Funding - Update CX(s) Applied: B1.25 Date: 04/09/2013 Location(s): Washington Offices(s): Bonneville Power Administration April 5, 2013 CX-010154: Categorical Exclusion Determination Digital Communication System Upgrade Project: 'D' Analog System Retirement and #WC SONET Ring CX(s) Applied: B1.19 Date: 04/05/2013 Location(s): Washington Offices(s): Bonneville Power Administration April 3, 2013 CX-010155: Categorical Exclusion Determination Augspurger Radio Tower Replacement Project CX(s) Applied: B1.19 Date: 04/03/2013 Location(s): Washington Offices(s): Bonneville Power Administration April 1, 2013 CX-010156: Categorical Exclusion Determination Chinook Property Funding CX(s) Applied: B1.25

371

Categorical Exclusion Determinations: Bonneville Power Administration |  

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

June 8, 2010 June 8, 2010 CX-003092: Categorical Exclusion Determination Ross-Lexington Number 1 New Access Road Construction: 15/1 to 15/2 CX(s) Applied: B1.13 Date: 06/08/2010 Location(s): Clark County, Washington Office(s): Bonneville Power Administration June 8, 2010 CX-002771: Categorical Exclusion Determination Marion and Sand Springs Substations Radio Tower Projects CX(s) Applied: B1.19 Date: 06/08/2010 Location(s): Marion, Oregon Office(s): Bonneville Power Administration June 4, 2010 CX-002773: Categorical Exclusion Determination Idaho Department of Fish and Game Purchase of Crystal Springs Trout Farm - Snake River Sockeye Captive Propagation Program CX(s) Applied: A7 Date: 06/04/2010 Location(s): Springfield, Idaho Office(s): Bonneville Power Administration June 3, 2010

372

New England Wind Forum: Wind Power Economics  

Wind Powering America (EERE)

State Activities Projects in New England Building Wind Energy in New England Wind Resource Wind Power Technology Economics Cost Components Determining Factors Influencing Wind Economics in New England How does wind compare to the cost of other electricity options? Markets Siting Policy Technical Challenges Issues Small Wind Large Wind Newsletter Perspectives Events Quick Links to States CT MA ME NH RI VT Bookmark and Share Wind Power Economics Long-Term Cost Trends Since the first major installations of commercial-scale wind turbines in the 1980s, the cost of energy from wind power projects has decreased substantially due to larger turbine generators, towers, and rotor lengths; scale economies associated with larger projects; improvements in manufacturing efficiency, and technological advances in turbine generator and blade design. These technological advances have allowed for higher generating capacities per turbine and more efficient capture of wind, especially at lower wind speeds.

373

NREL: Water Power Research - Grid Integration  

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

Grid Integration Grid Integration High-voltage transmission lines and towers silouetted against a blue sky with the first glow of the rising sun on the horizon behind them. The national need for transmission improvements will have a direct impact on the effective use of renewable energy sources. For marine and hydrokinetic technologies to play a larger role in supplying the nation's energy needs, integration into the U.S. power grid is an important challenge to address. Efficient integration of variable power resources like water power is a critical part of the deployment planning and commercialization process. Variable and weather-dependent resources can create operational concerns for grid operators. These concerns include conventional generation ramping, load/generation balancing, and planning

374

Categorical Exclusion Determinations: Bonneville Power Administration |  

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

January 5, 2011 January 5, 2011 CX-005015: Categorical Exclusion Determination Redland South and Oregon City Microwave Tower Wireless Communication Projects CX(s) Applied: B1.7, B1.19 Date: 01/05/2011 Location(s): Clackamas County, Oregon Office(s): Bonneville Power Administration December 22, 2010 CX-004850: Categorical Exclusion Determination Marion to Santiam Fiber Installation CX(s) Applied: B4.7 Date: 12/22/2010 Location(s): Marion, Oregon Office(s): Bonneville Power Administration December 13, 2010 CX-004742: Categorical Exclusion Determination De Moss-Fossil 115-Kilovolt Line Upgrade CX(s) Applied: B4.6 Date: 12/13/2010 Location(s): Wasco County, Oregon Office(s): Bonneville Power Administration December 9, 2010 CX-004744: Categorical Exclusion Determination Provision of Funds to Confederated Salish and Kootenai Tribes (CSKT) for

375

Energy 101: Concentrating Solar Power | Department of Energy  

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

Energy 101: Concentrating Solar Power Energy 101: Concentrating Solar Power Energy 101: Concentrating Solar Power August 6, 2010 - 12:58pm Addthis Andy Oare Andy Oare Former New Media Strategist, Office of Public Affairs How does it work? Concentrating solar power technologies use mirrors to reflect sunshine, turning it into an intense beam that's collected as heat. Some of the heat is used to produce electricity immediately. The rest is stored so that the generators can provide power for homes and businesses long after the sun has set Whether capturing the sun's heat from towers, dishes, or troughs, concentrating solar power (CSP) technology is making exciting advances. So exciting, in fact, that the federal government is looking at more than 25 square miles in Nevada to demonstrate new CSP technology research.

376

Western Area Power Administration  

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

v*Zy- i , . v*Zy- i , . r ,v * -i S # Af [, (e- . - o -A tl }r- 0 v-" l^~4~S J l ^-)^ I^U^ck iM clti ^ Power Administration Follow-up to Nov. 25, 2008 Transition Meeting Undeveloped Transmission Right-of-Way Western has very little undeveloped transmission right-of-way. There is a 7-mile right- of-way between Folsom, CA and Roseville, CA where Western acquired a 250' wide right-of-way but is only using half of it. Another line could be built parallel to Western's line to relieve congestion in the Sacramento area. In addition, Western has rights-of- way for many transmission lines that could be rebuilt to increase transmission capacity. For example, Western's Tracy-Livermore 230-kV line is a single circuit line but the existing towers could support a double circuit line. These rights-of-way would have to

377

An integrated solar thermal power system using intercooled gas turbine and Kalina cycle  

Science Journals Connector (OSTI)

A new solar tower thermal power system integrating the intercooled gas turbine top cycle and the Kalina bottoming cycle is proposed in the present paper. The thermodynamic performance of the proposed system is investigated, and the irreversibility of energy conversion is disclosed using the energyutilization diagram method. On the top cycle of the proposed system, the compressed air after being intercooled is heated at 1000C or higher at the solar tower receiver and is used to drive the gas turbine to generate power. The ammoniawater mixture as the working substance of the bottom cycle recovers the waste heat from the gas turbine to generate power. A concise analytical formula of solar-to-electric efficiency of the proposed system is developed. As a result, the peak solar-to-electric efficiency of the proposed system is 27.5% at a gas turbine inlet temperature of 1000C under the designed solar direct normal irradiance of 800W/m2. Compared with a conventional solar power tower plant, the proposed integrated system conserves approximately 69% of consumed water. The results obtained in the current study provide an approach to improve solar-to-electric efficiency and offer a potential to conserve water for solar thermal power plants in arid area.

Shuo Peng; Hui Hong; Hongguang Jin; Zhifeng Wang

2012-01-01T23:59:59.000Z

378

TheGoldenGateBridgeWeatherJuly2010,Vol.65,No.7 fog, but the north tower had a story to tell. It  

E-Print Network (OSTI)

. It worked as a chimney. The fog entered and escaped through the openings of the tower, displaying iridescent they are caused by an object's shadows. Sightings of fogbows, solar glories, solar coronas, Brocken Spectres

Reading, University of

379

WindPACT Turbine Design Scaling Studies Technical Area 3ŒSelf-Erecting Tower and Nacelle Feasibility  

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

1 * NREL/SR-500-29493 1 * NREL/SR-500-29493 Global Energy Concepts, LLC Kirkland, Washington WindPACT Turbine Design Scaling Studies Technical Area 3-Self-Erecting Tower and Nacelle Feasibility March 2000-March 2001 National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401-3393 NREL is a U.S. Department of Energy Laboratory Operated by Midwest Research Institute * * * * Battelle * * * * Bechtel Contract No. DE-AC36-99-GO10337 May 2001 * NREL/SR-500-29493 WindPACT Turbine Design Scaling Studies Technical Area 3-Self-Erecting Tower and Nacelle Feasibility March 2000-March 2001 Global Energy Concepts, LLC Kirkland, Washington NREL Technical Monitor: Alan Laxson Prepared under Subcontract No. YAM-0-30203-01 National Renewable Energy Laboratory 1617 Cole Boulevard

380

The PNL single-tower measurement model of rotationally sampled turbulent wind, with user's guide for STRS2PC  

SciTech Connect

This report describes a single-tower rotationally sampled wind model, STRS-2, that approximates a set of time series of turbulent wind experienced by individual points rotating in circles in a crosswind plane using measurements from anemometers arrayed vertically along a single line. The purposes of the model are (1) to use turbulence measurements made economically from conventional single-tower arrays of anemometers, (2) to incorporate measures characteristics of the wind at specific sites under consideration for operation of wind turbines, spanning the height range if interest, and (3) to estimate the unmeasured turbulence characteristics in the crosswind plane that spans the disk of the rotor blades. 17 refs., 15 figs., 5 tabs.

Connell, J.R.; Morris, V.R.; Powell, D.C.; Gower, G.L.

1988-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "reflector power tower" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Separation of Fine Particles from Gases in Wet Flue Gas Desulfurization System Using a Cascade of Double Towers  

Science Journals Connector (OSTI)

Separation of Fine Particles from Gases in Wet Flue Gas Desulfurization System Using a Cascade of Double Towers ... The authors thank the High-Tech Research and Development Program of China (No. 2008AA05Z306), the Natural Science Foundation of Jiangsu Province (No. BK2008283), and the Scientific Research Foundation of Graduate School of Southeast University for their financial support. ... with high performance by cascading packed columns. ...

Jingjing Bao; Linjun Yang; Shijuan Song; Guilong Xiong

2012-02-15T23:59:59.000Z

382

ARRA FEMP Technical Assistance -- Federal Aviation Administration Project 209 -- Control Tower and Support Building, Palm Springs, CA  

SciTech Connect

This report represents findings of a design review team that evaluated construction documents (at the 100% level) and operating specifications for a new control tower and support building that will be built in Palm Springs, California by the Federal Aviation Administration (FAA). The focus of the review was to identify measures that could be incorporated into the final design and operating specifications that would result in additional energy savings for the FAA that would not have otherwise occurred.

Arends, J.; Sandusky, William F.

2010-03-31T23:59:59.000Z

383

A model for noise radiated by submerged piles and towers in littoral environments  

Science Journals Connector (OSTI)

Pile driving in shallow water during the construction of bridges and other structures can produce transient broadband noise of sufficient intensity to kill fish and disturb marine mammals. Sustained tonal noise radiated by towers supporting offshore wind turbines contains energy in frequency bands that may inhibit detection of coastal activities via passive sonar and seismic sensors. Understanding the generation and propagation of underwater noise due to pile driving and wind farms is important for determining the best strategies for mitigating the environmental impact of these noisesources. An analytic model based on a Green's function approach is presented for the sound radiated in the water column by a submerged cylindrical structure embedded in horizontally stratified layers of sediment. The sediment layers are modeled as viscoelastic media and the Green's function is derived via angular spectrum decomposition. Noise radiation due to both vibration of the structure and impulses delivered to the sediment is considered. Contributions to the pressure field in the water column due to radiation directly into the water radiation from the sediment into the water and Scholte waves propagating along the sediment-water interface will be discussed. [Work supported by the ARL:UT IR&D program.

Todd A. Hay; Yurii A. Ilinskii; Evgenia A. Zabolotskaya; Preston S. Wilson; Mark F. Hamilton

2011-01-01T23:59:59.000Z

384

Energy penalty analysis of possible cooling water intake structurerequirements on existing coal-fired power plants.  

SciTech Connect

Section 316(b) of the Clean Water Act requires that cooling water intake structures must reflect the best technology available for minimizing adverse environmental impact. Many existing power plants in the United States utilize once-through cooling systems to condense steam. Once-through systems withdraw large volumes (often hundreds of millions of gallons per day) of water from surface water bodies. As the water is withdrawn, fish and other aquatic organisms can be trapped against the screens or other parts of the intake structure (impingement) or if small enough, can pass through the intake structure and be transported through the cooling system to the condenser (entrainment). Both of these processes can injure or kill the organisms. EPA adopted 316(b) regulations for new facilities (Phase I) on December 18, 2001. Under the final rule, most new facilities could be expected to install recirculating cooling systems, primarily wet cooling towers. The EPA Administrator signed proposed 316(b) regulations for existing facilities (Phase II) on February 28, 2002. The lead option in this proposal would allow most existing facilities to achieve compliance without requiring them to convert once-through cooling systems to recirculating systems. However, one of the alternate options being proposed would require recirculating cooling in selected plants. EPA is considering various options to determine best technology available. Among the options under consideration are wet-cooling towers and dry-cooling towers. Both types of towers are considered to be part of recirculating cooling systems, in which the cooling water is continuously recycled from the condenser, where it absorbs heat by cooling and condensing steam, to the tower, where it rejects heat to the atmosphere before returning to the condenser. Some water is lost to evaporation (wet tower only) and other water is removed from the recirculating system as a blow down stream to control the building up of suspended and dissolved solids. Makeup water is withdrawn, usually from surface water bodies, to replace the lost water. The volume of makeup water is many times smaller than the volume needed to operate a once-through system. Although neither the final new facility rule nor the proposed existing facility rule require dry cooling towers as the national best technology available, the environmental community and several States have supported the use of dry-cooling technology as the appropriate technology for addressing adverse environmental impacts. It is possible that the requirements included in the new facility rule and the ongoing push for dry cooling systems by some stakeholders may have a role in shaping the rule for existing facilities. The temperature of the cooling water entering the condenser affects the performance of the turbine--the cooler the temperature, the better the performance. This is because the cooling water temperature affects the level of vacuum at the discharge of the steam turbine. As cooling water temperatures decrease, a higher vacuum can be produced and additional energy can be extracted. On an annual average, once-through cooling water has a lower temperature than recirculated water from a cooling tower. By switching a once-through cooling system to a cooling tower, less energy can be generated by the power plant from the same amount of fuel. This reduction in energy output is known as the energy penalty. If a switch away from once-through cooling is broadly implemented through a final 316(b) rule or other regulatory initiatives, the energy penalty could result in adverse effects on energy supplies. Therefore, in accordance with the recommendations of the Report of the National Energy Policy Development Group (better known as the May 2001 National Energy Policy), the U.S. Department of Energy (DOE), through its Office of Fossil Energy, National Energy Technology Laboratory (NETL), and Argonne National Laboratory (ANL), has studied the energy penalty resulting from converting plants with once-through cooling to wet towers or indirect-dry towers. Five l

Veil, J. A.; Littleton, D. J.; Gross, R. W.; Smith, D. N.; Parsons, E.L., Jr.; Shelton, W. W.; Feeley, T. J.; McGurl, G. V.

2006-11-27T23:59:59.000Z

385

NREL: Wind Research - Mariah Power's Windspire Wind Turbine Testing and  

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

Mariah Power's Windspire Wind Turbine Testing and Results Mariah Power's Windspire Wind Turbine Testing and Results A video of Mariah Power's Windspire wind turbine. Text Version As part of the National Renewable Energy Laboratory and U.S. Department of Energy (NREL/DOE) Independent Testing project, NREL tested Mariah Power's Windspire Giromill small wind turbine at the National Wind Technology Center (NWTC) through January 14, 2009 when NREL terminated its testing. Read a chronology of events and letter from Mariah Power to NREL. The Windspire is a 1.2-kilowatt (kW) vertical-axis small wind turbine. The turbine tower is 9.1 meters tall, and its rotor area is 1.2 by 6.1 meters. The turbine has a permanent-magnet generator with a single-phase output at 120 volts AC. Testing Summary Testing was terminated January 14, 2009. Published test reports include

386

Diversion assumptions for high-powered research reactors. ISPO C-50 Phase 1  

SciTech Connect

This study deals with diversion assumptions for high-powered research reactors -- specifically, MTR fuel; pool- or tank-type research reactors with light-water moderator; and water, beryllium, or graphite reflectors, and which have a power level of 25 MW(t) or more. The objective is to provide assistance to the IAEA in documentation of criteria and inspection observables related to undeclared plutonium production in the reactors described above, including: criteria for undeclared plutonium production, necessary design information for implementation of these criteria, verification guidelines including neutron physics and heat transfer, and safeguards measures to facilitate the detection of undeclared plutonium production at large research reactors.

Binford, F.T.

1984-01-01T23:59:59.000Z

387

Project Profile: High-Temperature Thermal Array for Next-Generation Solar Thermal Power Production  

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

The Los Alamos National Laboratory (ORNL), under the National Laboratory R&D competitive funding opportunity, is developing a megawatt-scale heat pipebased technology designed to bridge the heliostat reflector field and the power cycle by replacing both the solar receiver and the heat transfer fluid (HTF) system used in concentrating solar power (CSP) systems. The technology, called the high-temperature thermal array, aims to achieve the SunShot Initiative's goals by addressing technical challenges, reducing capital and operating expenses, and increasing net photon-to-electricity conversion efficiency.

388

Technology of Computational Fluid Dynamics in space engines and solar-gravity draught power plants  

Science Journals Connector (OSTI)

Non-isentropic discontinuous, unsteady flows with energy addition or extraction, during ignition of solid propellant rocket motors or tall solar towers heating transients are approached through a wave front method, initially developed by Zannetti for isentropic flows in aerodynamics. Its application in discontinuous flows with zones of different behaviour and energy extraction proves highly efficient. Computational efficiency is demonstrated by Computational Fluid Dynamics simulation of the starting transients in ADDA Solid Rocket Engines (SRE) and in the SEATTLER solar mirror tower. The code is exclusively directed to unsteady flow simulations in slender channels. The wave front model scheme covers the dual behaviour of fully non-isentropic flow with mass addition and mixing in the thrust chamber or blunt heat addition in a heater and fully isentropic through the exhaust nozzle or gravity draught in a tall tower. Along the tower of the solar-gravity draught power plants, small perturbation discontinuous flows are covered. Code robustness is demonstrated during runs on the PC. The 1D numerical scheme is based on the resolution of gasdynamic discontinuities within the enhanced method of Zannetti.

Radu Dan Rugescu

2008-01-01T23:59:59.000Z

389

The Cryogenic Dark Matter Search: First 5-Tower Data and Improved Understanding of Ionization Collection  

SciTech Connect

The Cryogenic Dark Matter Search (CDMS) is searching for Weakly Interacting Massive Particles (WIMPs) with cryogenic particle detectors. These detectors have the ability to discriminate between nuclear recoil candidate and electron recoil background events by collecting both phonon and ionization energy from recoils in the detector crystals. The CDMS-II experiment has completed analysis of the first data runs with 30 semiconductor detectors at the Soudan Underground Laboratory, resulting in a world leading WIMP-nucleon spin-independent cross section limit for WIMP masses above 44 GeV/c{sup 2}. As CDMS aims to achieve greater WIMP sensitivity, it is necessary to increase the detector mass and discrimination between signal and background events. Incomplete ionization collection results in the largest background in the CDMS detectors as this causes electron recoil background interactions to appear as false candidate events. Two primary causes of incomplete ionization collection are surface and bulk trapping. Recent work has been focused on reducing surface trapping through the modification of fabrication methods for future detectors. Analyzing data taken with test devices has shown that hydrogen passivation of the amorphous silicon blocking layer worsens surface trapping. Additional data has shown that the iron-ion implantation used to lower the critical temperature of the tungsten transition-edge sensors causes a degradation of the ionization collection. Using selective implantation on future detectors may improve ionization collection for events near the phonon side detector surface. Bulk trapping is minimized by neutralizing ionized lattice impurities. Detector investigations at testing facilities and in situ at the experimental site have provided methods to optimize the neutralization process and monitor running conditions to maintain full ionization collection. This work details my contribution to the 5-tower data taking, monitoring, and analysis effort as well as the SuperCDMS detector development with the focus on monitoring and improving ionization collection in the detectors.

Bailey, Catherine N.; /Case Western Reserve U.

2010-01-01T23:59:59.000Z

390

A Dielectric Omnidirectional Reflector  

Science Journals Connector (OSTI)

...heat barrier or collector in thermoelectric...for imaging and solar energy collection and...confined to the slabs with the high index...heat barrier or collector in thermoelectric...heat barrier or collector in thermoelectric...for imaging and solar...

Yoel Fink; Joshua N. Winn; Shanhui Fan; Chiping Chen; Jurgen Michel; John D. Joannopoulos; Edwin L. Thomas

1998-11-27T23:59:59.000Z

391

The Vermont Yankee Nuclear Power Station will use a single-unit boilingwater  

E-Print Network (OSTI)

reactor with an initial power rating of 1593 thermal megawatts (MWt) to provide a net power output of 513 electrical megawatts (Me). The reactor will be cooled by a once-through flow of water pumped from and returned to Vernon Pond, an existing impoundment of the Connecticut River (built to serve the Vernon Hydroelectric Station) and also by means of mechanical draft cooling towers. 3. Sumnary of environmental impact including beneficial and adverse effects follows: a. Cooling water heated to about 20*F above inlet temperature will be discharged to Vernon Pond at a rate of 840 cfs when the plant operates on a total open-cycle basis. Mechanical-draft cooling towers are provided to protect Vernon Pond during low flow and critical temperature periods in the Connecticut River. b. About 150 acres of Vernon Pond in the vicinity of the station may be subjected to some thermal and biological stress from discharge of the

Vermont Yankee

392

Optimizing the CSP Tower Air Brayton Cycle System to Meet the SunShot Objectives  

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

This presentation was delivered at the SunShot Concentrating Solar Power (CSP) Program Review 2013, held April 2325, 2013 near Phoenix, Arizona.

393

High power  

Science Journals Connector (OSTI)

... 1970s technomanic projects such as nuclear power stations were still in vogue. Environmentalists argued that solar power seemed a far safer, cheaper and reassuringly low-tech power source. The technomaniacs ... tech power source. The technomaniacs, fearing that they were losingthis argument, sought to hijack solar power themselves. They proposed an enormously expensive and complicated ...

David Jones

1994-03-03T23:59:59.000Z

394

FINAL REPORT: EDDY-COVARIANCE FLUX TOWER AND TRACER TECHNOLOGY SUPPORT FOR THE UNIVERSITY OF GEORGIA PROPOSAL: FROM TOWER TO PIXEL: INTEGRATION OF PATCH-SIZE NEE USING EXPERIMENTAL MODELING FOOTPRINT ANALYSIS.  

SciTech Connect

Brookhaven National Laboratory has been funded since October of 2000 to provide assistance to the University of Georgia in conducting footprint analyses of individual towers based on meteorology and trace gas measurements. Brookhaven researchers conducted air flow measurements using perfluorocarbon tracers and meteorological instrumentation for three experimental campaigns at an AmeriFlux research site maintained by Dr. Monique Leclerc near Gainesville, FL. In addition, BNL provided assistance with remote data collection and distribution from remote field sites operated by Dr. John Hom of the US Forest Service in the Pine Barrens of New Jersey and at FACE research sites in North Carolina and Wisconsin.

LEWIN,K.F.; NAGY, J.; WATSON, T.B.

2007-09-01T23:59:59.000Z

395

Sandia National Laboratories: Concentrating Solar Power (CSP...  

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

to, (1) novel research, development, and demonstration in reflector systems for efficient solar energy collection; (2) large-scale metrology; (3) receivers for solar-to-thermal...

396

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

Science Journals Connector (OSTI)

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

Mara J. Montes; Carlo Rubbia; Rubn Abbas; Jos M. Martnez-Val

2014-01-01T23:59:59.000Z

397

Power Marketing  

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

UGPS' Marketing Service Area Power Marketing As a marketer of Federal power in the Upper Great Plains Region, the Power Marketing staff provides a variety of services for customers...

398

Concentrating Solar Power (Fact Sheet)  

SciTech Connect

Fact sheet describing the overall capabilities of the NREL CSP Program: collector/receiver characterization, advanced reflector and absorber materials, thermal storage and advanced heat transfer fluids, and CSP modeling and analysis.

Not Available

2010-08-01T23:59:59.000Z

399

A novel power block for CSP systems  

SciTech Connect

Concentrating Solar Thermal Power (CSP) and in particular parabolic trough, is a proven large-scale solar power technology. However, CSP cost is not yet competitive with conventional alternatives unless subsidized. Current CSP plants typically include a condensing steam cycle power block which was preferably designed for a continuous operation and higher operating conditions and therefore, limits the overall plant cost effectiveness and deployment. The drawbacks of this power block are as follows: (i) no power generation during low insolation periods (ii) expensive, large condenser (typically water cooled) due to the poor extracted steam properties (high specific volume, sub-atmospheric pressure) and (iii) high installation and operation costs. In the current study, a different power block scheme is proposed to eliminate these obstacles. This power block includes a top Rankine cycle with a back pressure steam turbine and a bottoming Kalina cycle comprising another back pressure turbine and using ammonia-water mixture as a working fluid. The bottoming (moderate temperature) cycle allows power production during low insolation periods. Because of the superior ammonia-water vapor properties, the condensing system requirements are much less demanding and the operation costs are lowered. Accordingly, air cooled condensers can be used with lower economical penalty. Another advantage is that back pressure steam turbines have a less complex design than condensing steam turbines which make their costs lower. All of these improvements could make the combined cycle unit more cost effective. This unit can be applicable in both parabolic trough and central receiver (solar tower) plants. The potential advantage of the new power block is illustrated by a detailed techno-economical analysis of two 50 MW parabolic trough power plants, comparing between the standard and the novel power block. The results indicate that the proposed plant suggests a 4-11% electricity cost saving. (author)

Mittelman, Gur [ASP Ltd., Advanced Solar Power, Industrial Zone, Be'er Tuviyya (Israel); Epstein, Michael [Solar Research Facilities Unit, Weizmann Institute of Science (Israel)

2010-10-15T23:59:59.000Z

400

NREL: Concentrating Solar Power Research Home Page  

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

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

Note: This page contains sample records for the topic "reflector power tower" 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

NETL: Water-Energy Interface - Power Plant Water Management  

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

Application of Pulsed Electrical Fields for Advanced Cooling in Coal-Fired Power Plants Application of Pulsed Electrical Fields for Advanced Cooling in Coal-Fired Power Plants Drexel University is conducting research with the overall objective of developing technologies to reduce freshwater consumption at coal-fired power plants. The goal of this research is to develop a scale-prevention technology based on a novel filtration method and an integrated system of physical water treatment in an effort to reduce the amount of water needed for cooling tower blowdown. This objective is being pursued under two coordinated, National Energy Technology Laboratory sponsored research and development projects. In both projects, pulsed electrical fields are employed to promote the precipitation and removal of mineral deposits from power plant cooling water, thereby allowing the water to be recirculated for longer periods of time before fresh makeup water has to be introduced into the cooling water system.

402

Seismic Evaluation of a Multipurpose Tower in Yellowknife, Northwest Territories, Canada  

Science Journals Connector (OSTI)

...variable temperature, wind, and sunlight conditions...hamper both operation and maintenance of equipment in such...chemical batteries, wind and solar power generation...communications dishes, wind turbines, fossil-fuel generators...

Wayne N. Edwards; Isa Asudeh; Calvin Andrews; George Jensen; Fredrick Murphy; Ross Ashlie

403

Cooling Tower Operation in the Hot and Humid Climates of Arid Zones  

E-Print Network (OSTI)

the performance of the A/C system, increases the fan power and water consumption. The latter is of special concern to Kuwait and other countries in the region where the soft water is produced through seawater desalination....

Al-Bassam, E.; Maheshwari, G. P.; Sebzali, M.

2000-01-01T23:59:59.000Z

404

Verification survey report of the south waste tank farm training/test tower and hazardous waste storage lockers at the West Valley demonstration project, West Valley, New York  

SciTech Connect

A team from ORAU's Independent Environmental Assessment and Verification Program performed verification survey activities on the South Test Tower and four Hazardous Waste Storage Lockers. Scan data collected by ORAU determined that both the alpha and alpha-plus-beta activity was representative of radiological background conditions. The count rate distribution showed no outliers that would be indicative of alpha or alpha-plus-beta count rates in excess of background. It is the opinion of ORAU that independent verification data collected support the site?s conclusions that the South Tower and Lockers sufficiently meet the site criteria for release to recycle and reuse.

Weaver, Phyllis C.

2012-08-29T23:59:59.000Z

405

California Code of Regulations, Title 8, Section 1646. Tower Scaffolds and Rolling Scaffolds, Wood or Metal. This information is provided free of charge by the Department of Industrial Relations from its  

E-Print Network (OSTI)

California Code of Regulations, Title 8, Section 1646. Tower Scaffolds and Rolling Scaffolds, Wood Scaffolds and Rolling Scaffolds, Wood or Metal. (a) The minimum dimension of the base of any free of Regulations, Title 8, Section 1646. Tower Scaffolds and Rolling Scaffolds, Wood or Metal. projecting end

Eisen, Michael

406

Demonstration of Recessed Downlight Technologies: Power and Illumination Assessment  

SciTech Connect

Solid state lighting (SSL), specifically light-emitting diodes (LED), has been advancing at a rapid pace, and there are presently multiple products available that serve as direct replacements for traditional luminaires. In this demonstration, conventional recessed lights in a conference room were used to compare conventional incandescent A-lamps, incandescent reflector R-lamps, dimming compact fluorescent lamps (CFL), to an LED replacement product. The primary focus during the study was on light delivered to the task plane as provided by the power required by the lighting system. Vertical illuminance, dimming range, and color shift are also important indicators of lighting quality and are discussed in the report. The results clearly showed that LEDs, with dimming-capable drivers, are much more efficient than incandescent and CFLs. Further, LEDs provide much smoother and consistent dimming than dimmable CFLs. On the potential negative side, it is important that the dimming switch be identified as compatible with the LED driver. A wide variety of dimmer switches are capable of dimming LEDs down to 15% of full light output, while select others can be capable of dimming LEDs down to 5%. In addition, LEDs can be intensive light sources, which can result in uncomfortable glare in some applications and to some occupants. Higher ceiling (9-foot or greater) or non-specular reflectors can act to alleviate the potential for glare.

Parker, Steven A.; Beeson, Tracy A.

2009-11-20T23:59:59.000Z

407

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

Science Journals Connector (OSTI)

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

Yang Liu; Peng Hu; Qian Zhang; Zeshao Chen

2014-01-01T23:59:59.000Z

408

GaInAsSb/A1GaAsSb/Sb Thermophotovoltaic Devices With an Internal Back-Surface Reflector Formed by Wafer Bonding  

SciTech Connect

A novel implementation for GAInAsSb/AlGaAsSb/GaSb TPV cells with an internal back-surface reflector (BSR) formed by wafer bonding to GaAs is demonstrated. The SiO{sub x}/Ti/Au internal BSR enhances optical absorption within the device, while the dielectric layer provides electrical isolation. This configuration has the potential to improve TPV device performance; is compatible with monolithic series-interconnection of TPV cells for building voltage; and can mitigate the requirements of filters used for front-surface spectral control. At a short-circuit density of 0.4 A/cm{sup 2}, the open-circuit voltage of a single TPV cell is 0.2 V, compared to 0.37 and 1.8 V for 2- and 10-junction series-interconnected TPV cells, respectively.

C.A. Wang; R.K. Huang; D.A. Shiau; M.K. Connors; P.G. Murphy; P.W. O'brien; A.C. Anderson; D.M. DePoy; G. Nichols; M.N. Palmasiano

2002-12-18T23:59:59.000Z

409

AlGaInP thin-film LED with omni-directionally reflector and ITO transparent conducting n-type contact  

Science Journals Connector (OSTI)

In this paper a novel AlGaInP thin-film light-emitting diode (LED) with omni-directionally reflector (ODR) and transparent conducting indium tin oxide (ITO) n-type contact structure is proposed, and fabrication process is developed. This reflector is realized with the combination of a low-refractive-index dielectric layer and a high reflectivity metal layer. This allows the light emitted or internally reflected downwardly towards the GaAs substrate at any angle of incidence to be reflected towards the top surface of the chip. ITO n-type contact is used for anti-reflection and current spreading layers on the ODR-LED with ITO. The sheet resistance of the ITO films (95 nm) deposited on n-ohmic contact of ODR-LED is of the order 23.5?/ with up to 90% transmittance (above 92% for 590770 nm) in the visible region of the spectrum. The optical and electrical characteristics of the ODR-LED with ITO are presented and compared to conventional AS-LED and ODR-LED without ITO. It is shown that the light output from the ODR-LED with ITO at forward current 20 mA exceeds that of AS-LED and ODR-LED without ITO by about a factor of 1.63 and 0.16, respectively. A favourable luminous intensity of 218.3 mcd from the ODR-LED with ITO (peak wavelength 620 nm) could be obtained under 20 mA injection, which is 2.63 times and 1.21 times higher than that of AS-LED and ODR-LED without ITO, respectively.

Zhang Jian-Ming; Zou De-Shu; Xu Chen; Guo Wei-Ling; Zhu Yan-Xu; Liang Ting; Da Xiao-Li; Li Jian-Jun; Shen Guang-Di

2007-01-01T23:59:59.000Z

410

NETL: Water-Energy Interface - Power Plant Water Management  

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

Use of Air2Air™ Technology to Recover Fresh-Water from the Normal Evaporative Cooling Loss at Coal-Based Thermoelectric Power Plants – SPX Cooling Systems Use of Air2Air™ Technology to Recover Fresh-Water from the Normal Evaporative Cooling Loss at Coal-Based Thermoelectric Power Plants – SPX Cooling Systems In this project, SPX Cooling Systems, formerly Marley Cooling Technologies, Inc., evaluates the performance of its patented Air2Air(tm) condensing technology in cooling tower applications at coal-fired electric power plants. Researchers quantify Air2Air(tm) water conservation capabilities with results segmented by season and time of day. They determine the pressure drop and energy use during operation. Additionally, SPX Cooling Systems develops a collection method for the recovered water, analyzes water quality, and identifies potential on-site processes capable of utilizing the recovered water.

411

Jiangsu Guoshen Wind Power Equipment Co Ltd | Open Energy Information  

Open Energy Info (EERE)

Guoshen Wind Power Equipment Co Ltd Guoshen Wind Power Equipment Co Ltd Jump to: navigation, search Name Jiangsu Guoshen Wind Power Equipment Co Ltd Place Yancheng, Jiangsu Province, China Sector Wind energy Product Funing-based wind tower producer. Coordinates 33.583°, 113.983009° 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":33.583,"lon":113.983009,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

412

April 2013 Most Viewed Documents for Power Generation And Distribution |  

Office of Scientific and Technical Information (OSTI)

April 2013 Most Viewed Documents for Power Generation And Distribution April 2013 Most Viewed Documents for Power Generation And Distribution Electric power high-voltage transmission lines: Design options, cost, and electric and magnetic field levels Stoffel, J.B.; Pentecost, E.D.; Roman, R.D.; Traczyk, P.A. (1994) 719 Seventh Edition Fuel Cell Handbook NETL (2004) 628 ASPEN Plus Simulation of CO2 Recovery Process Charles W. White III (2003) 343 Wet cooling towers: rule-of-thumb design and simulation Leeper, S.A. (1981) 290 Load flow analysis: Base cases, data, diagrams, and results Portante, E.C.; Kavicky, J.A.; VanKuiken, J.C.; Peerenboom, J.P. (1997) 248 Controlled low strength materials (CLSM), reported by ACI Committee 229 Rajendran, N. (1997) 106 Micro-CHP Systems for Residential Applications Timothy DeValve; Benoit Olsommer (2007)

413

September 2013 Most Viewed Documents for Power Generation And Distribution  

Office of Scientific and Technical Information (OSTI)

Power Generation And Distribution Power Generation And Distribution Electric power high-voltage transmission lines: Design options, cost, and electric and magnetic field levels Stoffel, J.B.; Pentecost, E.D.; Roman, R.D.; Traczyk, P.A. (1994) 200 Wet cooling towers: rule-of-thumb design and simulation Leeper, S.A. (1981) 103 ASPEN Plus Simulation of CO2 Recovery Process Charles W. White III (2003) 76 Feed-pump hydraulic performance and design improvement, Phase I: research program design. Final report Brown, W.H.; Gopalakrishnan, S.; Fehlau, R.; Thompson, W.E.; Wilson, D.G. (1982) 69 Seventh Edition Fuel Cell Handbook NETL (2004) 65 Load flow analysis: Base cases, data, diagrams, and results Portante, E.C.; Kavicky, J.A.; VanKuiken, J.C.; Peerenboom, J.P. (1997) 52 Controlled low strength materials (CLSM), reported by ACI Committee

414

University of Minnesota Boosts Studies with Wind Power | Department of  

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

Boosts Studies with Wind Power Boosts Studies with Wind Power University of Minnesota Boosts Studies with Wind Power October 27, 2011 - 10:53am Addthis Time-lapse of the University of Minnesota's wind turbine construction, from September 6 - 23, 2011. | Courtesy of the University of Minnesota College of Science and Engineering Eric Escudero Eric Escudero Senior Public Affairs Specialist & Contractor, Golden Field Office What does this project do? The American-made Clipper Liberty wind turbine and a 426-foot tall meteorological tower will allow researchers to work on improving wind turbine efficiency and will help train a new generation of engineers and technicians for careers in the wind industry. President Obama's goal to generate 80 percent of our nation's electricity through clean energy sources by 2035 is ambitious, but

415

Environmentally Protective Power Generation EPPG | Open Energy Information  

Open Energy Info (EERE)

Environmentally Protective Power Generation EPPG Environmentally Protective Power Generation EPPG Jump to: navigation, search Name Environmentally Protective Power Generation (EPPG) Place Tucson, Arizona Sector Wind energy Product Seeking financing for a Tower system, about which little has been disclosed, which would have wind and other backup. Coordinates 32.221553°, -110.969754° 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":32.221553,"lon":-110.969754,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

416

Wind Power  

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

Wind Power As the accompanying map of New Mexico shows, the best wind power generation potential near WIPP is along the Delaware Mountain ridge line of the southern Guadalupe...

417

Sandia National Laboratories: Energy Efficiency  

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

Towers for Utilities On September 6, 2012, in Desirable Features of Power Towers for Utilities Because of their practical energy storage, solar power towers have two features...

418

Sandia National Laboratories: Energy Security  

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

Towers for Utilities On September 6, 2012, in Desirable Features of Power Towers for Utilities Because of their practical energy storage, solar power towers have two features...

419

Sandia National Laboratories: NSTTF  

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

Towers for Utilities On September 6, 2012, in Desirable Features of Power Towers for Utilities Because of their practical energy storage, solar power towers have two features...

420

Sandia National Laboratories: Renewable Energy  

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

Towers for Utilities On September 6, 2012, in Desirable Features of Power Towers for Utilities Because of their practical energy storage, solar power towers have two features...

Note: This page contains sample records for the topic "reflector power tower" 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

23.11.2014bo Akademi Univ -Thermal and Flow Engineering Piispankatu 8, 20500 Turku 1/36 7. Air conditioning, cooling towers  

E-Print Network (OSTI)

23.11.2014?bo Akademi Univ - Thermal and Flow Engineering Piispankatu 8, 20500 Turku 1/36 7. Air conditioning, cooling towers Ron Zevenhoven ?bo Akademi University Thermal and Flow Engineering Laboratory Engineering Piispankatu 8, 20500 Turku 2/36 7.1 Humid air #12;23.11.2014 ?bo Akademi Univ - Thermal and Flow

Zevenhoven, Ron

422

Green Building Technological Approaches for Re-alization from an Investors Perspective based on the MUNICH RE Tower as an Example  

E-Print Network (OSTI)

The Development ?MUNICH RE TOWER? was built from 2001-2003 by MEAG MUNICH ERGO AssetManagement GmbH un-der the Management of Hubert Garzorz. In 1999 the architects Allmann Sattler Wappner won the first prize of the architectural competition and were assigned...

Garzorz, H.

2008-01-01T23:59:59.000Z

423

LANIER, BRYAN KEITH. Study in the Improvement in Strength and Stiffness Capacity of Steel Multi-sided Monopole Towers Utilizing Carbon Fiber Reinforced  

E-Print Network (OSTI)

Multi-sided Monopole Towers Utilizing Carbon Fiber Reinforced Polymers as a Retrofitting Mechanism a strengthening solution utilizing high-modulus carbon fiber polymers as a retrofitting mechanism for monopole the behavior and validates the effectiveness of carbon fiber in increasing the flexural capacity of existing

424

Combining a monostatic sodar with a radar wind profiler and RASS in a power plant pollution study  

SciTech Connect

A single-beam monostatic sodar, radar wind profiler, radio acoustic sounding system (RASS), and in situ sensors mounted on a 100-m tower were used to acquire meteorological data in the vicinity of a coal burning power plant in a northern Thailand valley. These data were used to examine the atmospheric processes that are responsible for fumigation of high concentrations of sulfur dioxide to the surface on a near daily basis during the cool season.

Crescenti, G.H.; Templeman, B.D.; Gaynor, J.E.

1995-05-01T23:59:59.000Z

425

SNR Denton US LLP 1301 K Street, NW Suite 600, East Tower Washington, DC 20005-3364 USA  

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

SNR Denton US LLP SNR Denton US LLP 1301 K Street, NW Suite 600, East Tower Washington, DC 20005-3364 USA Thomas C. Jensen Partner thomas.jensen@snrdenton.com D +1 202 408 3956 M 703 304 5211 T +1 202 408 6400 F +1 202 408 6399 snrdenton.com March 28, 2012 BY E-MAIL Lamont Jackson Office of Electricity Delivery and Energy Reliability Mail Code: OE-20 U.S. Department of Energy 1000 Independence Avenue SW Washington, DC 20585 Re: OE Docket No. RRTT-IR-001 Dear Mr. Jackson:: This letter is submitted on behalf of PPL Electric and Public Service Electric and Gas Company ("PSE&G") 1 ,(referred to herein as "the Companies") with respect to the Susquehanna-Roseland

426

Anderson Tower of States and Nematic Order of Spin-1 Bosonic Atoms on a 2D Lattice  

Science Journals Connector (OSTI)

We investigate the structure of the spectrum of antiferromagnetically coupled spin-1 bosons on a square lattice using degenerate perturbation theory and exact diagonalizations of finite clusters. We show that the superfluid phase develops an Anderson tower of states typical of nematic long-range order with broken SU(2) symmetry. We further show that this order persists into the Mott-insulating phase down to zero hopping for one boson per site and down to a critical hopping for two bosons per site, in agreement with mean-field and quantum Monte Carlo results. The connection with the transition between a fragmented condensate and a polar one in a single trap is briefly discussed.

Laurent de Forges de Parny; Hongyu Yang; Frdric Mila

2014-11-12T23:59:59.000Z

427

Observations of the Pulsar PSR B1951+32 with the Solar Tower Atmospheric Cherenkov Effect Experiment  

E-Print Network (OSTI)

We present the analysis and results of 12.5 hours of high-energy gamma-ray observations of the EGRET-detected pulsar PSR B1951+32 using the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE). STACEE is an atmospheric Cherenkov detector, in Albuquerque, New Mexico, that detects cosmic gamma rays using the shower-front-sampling technique. STACEE's sensitivity to astrophysical sources at energies around 100 GeV allows it to investigate emission from gamma-ray pulsars with expected pulsed emission cutoffs below 100 GeV. We discuss the observations and analysis of STACEE's PSR 1951+32 data, accumulated during the 2005 and 2006 observing seasons.

J. Kildea; J. Zweerink; J. Ball; J. E. Carson; C. E. Covault; D. D. Driscoll; P. Fortin; D. M. Gingrich; D. S. Hanna; A. Jarvis; T. Lindner; C. Mueller; R. Mukherjee; R. A. Ong; K. Ragan; D. A. Williams

2007-10-25T23:59:59.000Z

428

Observations of the Pulsar PSR B1951+32 with the Solar Tower Atmospheric Cherenkov Effect Experiment  

E-Print Network (OSTI)

We present the analysis and results of 12.5 hours of high-energy gamma-ray observations of the EGRET-detected pulsar PSR B1951+32 using the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE). STACEE is an atmospheric Cherenkov detector, in Albuquerque, New Mexico, that detects cosmic gamma rays using the shower-front-sampling technique. STACEE's sensitivity to astrophysical sources at energies around 100 GeV allows it to investigate emission from gamma-ray pulsars with expected pulsed emission cutoffs below 100 GeV. We discuss the observations and analysis of STACEE's PSR 1951+32 data, accumulated during the 2005 and 2006 observing seasons.

Kildea, J; Ball, J; Carson, J E; Covault, C E; Driscoll, D D; Fortin, P; Gingrich, D M; Hanna, D S; Jarvis, A; Lindner, T; Mller, C; Mukherjee, R; Ong, R A; Ragan, K; Williams, D A

2007-01-01T23:59:59.000Z

429

USE OF COAL DRYING TO REDUCE WATER CONSUMED IN PULVERIZED COAL POWER PLANTS  

SciTech Connect

This is the eighth Quarterly Report for this project. The background and technical justification for the project are described, including potential benefits of reducing fuel moisture, prior to firing in a pulverized coal boiler. Analyses were performed to determine the effects of coal product moisture on unit performance. Results are given showing how the coal product moisture level affects parameters such as boiler efficiency, power required to drive the fluidizing air fan, other station service power needed for fans and pulverizers, net unit heat rate, thermal energy rejected by the cooling tower, and stack emissions.

Nenad Sarunac; Edward Levy

2005-03-01T23:59:59.000Z

430

Nuclear Powers Benefits  

Science Journals Connector (OSTI)

Nuclear Powers Benefits ... Using nuclear power in place of fossil-fuel energy sources, such as coal, has prevented some 1.8 million air-pollution-related deaths and 64 gigatons of carbon emissions globally over the past four decades, a study concludes. ... These estimates suggest policymakers should continue to rely on and expand nuclear power in place of fossil fuels to mitigate climate change, the authors say (Environ. ...

MARK SCHROPE

2013-04-08T23:59:59.000Z

431

Wind shear for large wind turbine generators at selected tall tower sites  

SciTech Connect

The objective of the study described in this report is to examine the nature of wind shear profiles and their variability over the height of large horizontal-axis wind turbines and to provide information on wind shear relevant to the design and opertion of large wind turbines. Wind turbine fatigue life and power quality are related through the forcing functions on the blade to the shapes of the wind shear profiles and their fluctuations over the disk of rotation.

Elliott, D.L.

1984-04-01T23:59:59.000Z

432

Power System Equipment Module Test Project  

SciTech Connect

The technology of electric power generation when applying the binary process to hydrothermal resources had not yet been demonstrated in the United States. Accordingly, on November 10, 1977, the Electric Power Research Institute and the Department of Energy, acting through the Lawrence Berkeley Laboratory, agreed to cofund the Power System Equipment Module Test Project. The Power System Equipment Module Test Project consisted of a field test program to accomplish the objectives listed below while heating hydrocarbon fluids to above their critical points, expanding these fluids, and subsequently, condensing them below their critical points: (1) Verify the performance of state-of-the-art heat exchangers in geothermal service; (2) Verify the heat exchangers' performance heating either selected pure light hydrocarbons or selected mixtures of light hydrocarbons in the vicinity of their respective critical pressures and temperatures; (3) Establish overall heat transfer coefficients that might be used for design of commercial-size geothermal power plants using the same geothermal brine and light hydrocarbon working fluids; (4) Perform and investigate the above under representative fluid operating conditions during which the production wells would be pumped. The project was accomplished by diverting approximately 200 gpm of the flow from one of Magma Power Company's geothermal wells in the East Mesa Geothermal Field. After the heat was removed from the geothermal brine flow, the cooled flow was returned to Magma Power Company and recombined with the main brine stream for disposal by reinjection. Approximately five thermal megawatts was transferred from geothermal brine to hydrocarbon working fluids in a closed system. This heat was removed from the working fluids in a condenser and subsequently rejected to the environment by a wet cooling tower. The thermodynamic performance of both the working fluids and the system components was measured during the test program to achieve the project's objectives.

Schilling, J.R.

1980-12-01T23:59:59.000Z

433

DOWNHOLE POWER GENERATION AND WIRELESS COMMUNICATIONS FOR INTELLIGENT COMPLETIONS APPLICATIONS  

SciTech Connect

The development work during this quarter was focused in the assembly of the downhole power generator hardware and its electronics module. The quarter was also spent in the development of the surface system electronics and software to extract the acoustic data transmitted from downhole to the surface from the noise generated by hydrocarbon flow in wells and to amplify very small acoustic signals to increase the distance between the downhole tool and the surface receiver. The tasks accomplished during this report period were: (1) Assembly of the downhole power generator mandrel for generation of electrical power due to flow in the wellbore. (2) Test the piezoelectric wafers to assure that they are performing properly prior to integrating them to the mechanical power generator mandrel. (3) Coat the power generator wafers to prevent water from shorting the power generator wafers. (4) Test of the power generator using a water tower and an electric pump to create a water flow loop. (5) Test the power harvesting electronics module. (6) Upgrade the signal condition and amplification from downhole into the surface system. (7) Upgrade the surface processing system capability to process data faster. (8) Create a new filtering technique to extract the signal from noise after the data from downhole is received at the surface system.

Paul Tubel

2004-02-01T23:59:59.000Z

434

Nuclear Power  

Science Journals Connector (OSTI)

Nuclear Power ... THIS WEEKS issue contains six letters on nuclear power, a representative sample of the letters C&EN received in response to the editorial, Resist Hysteria, I wrote shortly after the earthquake and tsunami in Japan devastated the Fukushima Daiichi Nuclear Power Station (C&EN, March 21, page 5). ... Four of the six letters take sharp issue with the primary point I made in the editorial, which was that, despite the severity of the situation in Japan, nuclear power remains an essential component of our overall energy mix for the near to mid-term because it will help us avert the worst impacts of global climate disruption. ...

RUDY M. BAUM

2011-05-09T23:59:59.000Z

435

Power LCAT  

SciTech Connect

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

Drennen, Thomas

2012-08-15T23:59:59.000Z

436

Yakama Power  

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

Power Administration FROM: J.D. Williams Attorney RE: Initial Comments on Draft Load Following Regional Dialogue Contract Template Dear Mark, Please allow these comments...

437

Power LCAT  

ScienceCinema (OSTI)

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

Drennen, Thomas

2014-06-27T23:59:59.000Z

438

Running dry at the power plant  

SciTech Connect

In the future, competition for water will require electricity generators in the United States to address conservation of fresh water. There are a number of avenues to consider. One is to use dry-cooling and dry-scrubbing technologies. Another is to find innovative ways to recycle water within the power plant itself. A third is to find and use alternative sources of water, including wastewater supplies from municipalities, agricultural runoff, blackish groundwater, or seawater. Dry technologies are usually more capital intensive and typically exact a penalty in terms of plant performance, which in turn raises the cost of power generation. On the other hand, if the cost of water increases in response to greater demand, the cost differences between dry and wet technologies will be reduced. EPRI has a substantial R & D programme evaluating new water-conserving power plant technologies, improving dry and hybrid cooling technologies, reducing water losses in cooling towers, using degraded water sources and developing resource assessment and management decision support tools. 5 refs., 10 figs.

Barker, B.

2007-07-01T23:59:59.000Z

439

Potential of Concentrating Solar Power in Canada  

Science Journals Connector (OSTI)

Abstract In this paper, results of an analysis to assess the potential of concentrating solar thermal power applications in Canada are presented. First, a direct normal solar resource (DNI) resource map for Canada is introduced. This map indicates the locations where the DNI is the highest in Canada and is derived from the most recent Perez's SUNY satellite-based solar resource model Version number 3. Second, the methodology and results of a GIS analysis to identify the locations of the most suitable lands for concentrating solar thermal power (CSP) applications in Canada are discussed. The total areas of the CSP-suitable lands are presented in a tabulated and a map formats for each of the Canadian provinces where there is a maximum DNI solar resource. Third and finally, results of a technical economical analysis for two CSP system designs are discussed. The two CSP systems considered include parabolic trough with synthetic oil heat transfer fluid with and without storage, molten salt power tower with and without storage.

R. Djebbar; D. Belanger; D. Boutin; E. Weterings; M. Poirier

2014-01-01T23:59:59.000Z

440

Power system  

DOE Patents (OSTI)

A power system includes a prime mover, a transmission, and a fluid coupler having a selectively engageable lockup clutch. The fluid coupler may be drivingly connected between the prime mover and the transmission. Additionally, the power system may include a motor/generator drivingly connected to at least one of the prime mover and the transmission. The power-system may also include power-system controls configured to execute a control method. The control method may include selecting one of a plurality of modes of operation of the power system. Additionally, the control method may include controlling the operating state of the lockup clutch dependent upon the mode of operation selected. The control method may also include controlling the operating state of the motor/generator dependent upon the mode of operation selected.

Hickam, Christopher Dale (Glasford, IL)

2008-03-18T23:59:59.000Z

Note: This page contains sample records for the topic "reflector power tower" 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

Siting Utility-Scale Concentrating Solar Power Projects  

SciTech Connect

In 2002, Congress asked the U.S. Department of Energy to develop and scope out an initiative to fulfill the goal of having 1,000 megawatts (MW) of new parabolic trough, power tower, and dish engine solar capacity supplying the southwestern United States. In this paper, we present a review of the solar resource for Arizona, California, Nevada, and New Mexico. These four states have the greatest number of ''premium'' solar sites in the country and each has a renewable portfolio standard (RPS). We present information on the generation potential of the solar resources in these states. We also present regions within New Mexico that may be ideally suited for developing large-scale concentrating solar power (CSP) plants because of their proximity to load and their access to unconstrained transmission.

Mehos, M.; Owens, B.

2005-01-01T23:59:59.000Z

442

Meta-Analysis of Estimates of Life Cycle Greenhouse Gas Emissions from Concentrating Solar Power: Preprint  

SciTech Connect

In reviewing life cycle assessment (LCA) literature of utility-scale CSP systems, this analysis focuses on clarifying central tendency and reducing variability in estimates of life cycle greenhouse gas (GHG) emissions through a meta-analytical process called harmonization. From 125 references reviewed, 10 produced 36 independent GHG emission estimates passing screens for quality and relevance: 19 for parabolic trough technology and 17 for power tower technology. The interquartile range (IQR) of published GHG emission estimates was 83 and 20 g CO2eq/kWh for trough and tower, respectively, with medians of 26 and 38 g CO2eq/kWh. Two levels of harmonization were applied. Light harmonization reduced variability in published estimates by using consistent values for key parameters pertaining to plant design and performance. Compared to the published estimates, IQR was reduced by 69% and median increased by 76% for troughs. IQR was reduced by 26% for towers, and median was reduced by 34%. A second level of harmonization was applied to five well-documented trough LC GHG emission estimates, harmonizing to consistent values for GHG emissions embodied in materials and from construction activities. As a result, their median was further reduced by 5%, while the range increased by 6%. In sum, harmonization clarified previous results.

Heath, G. A.; Burkhardt, J. J.

2011-09-01T23:59:59.000Z

443

Cooperative Efforts by the Bonneville Power Administration to Promote Ferruginous Hawk Nesting on the Department of Energy's Hanford Reservation in Washington State  

Science Journals Connector (OSTI)

Publisher Summary The ferruginous hawk (Buteo regalis) is the largest soaring hawk in the United States with a maximum wingspan up to 1.32 meters (5 ft). The species is common to the grasslands and steppe areas of the western United States. The ferruginous hawk (Buteo regalis) was once common to the grassland areas of Washington State. The Washington State Department of Fish and Wildlife has identified nine territorial pairs that are using Bonneville Power Administration towers on the Hanford Reservation site in Central Washington. These pairs represent 18% of the active nesting population in 2002 of this threatened species as designated by the State. Ferruginous hawks did not range widely on the Reservation until specific transmission towers were introduced on the reservation in the 1970s. The nests are 2-3 ft. in diameter and are made of interwoven sagebrush stems in the lower part of the transmission tower body. To provide a better nesting site for the hawks, wood-nesting platforms were installed in the winter of 2003. These platforms are one-meter in diameter and are designed to prevent the nest from blowing out of the tower during high winds. A review of the nest platforms during the summer of 2003 indicated that at least one breeding pair that produced fledgling young occupied one nest. In 2004, with the assistance of ThermoSight, Inc, a remote camera was installed over the nest to observe and record the hawks during the nesting season.

William T. Erickson; James W. Watson; Bill Hubbard

2008-01-01T23:59:59.000Z

444

Strathclyde powerS ahead  

E-Print Network (OSTI)

Strathclyde powerS ahead the future of renewable energy SHARING AND ENHANCING RESEARCH Discover the vision of Principal Professor Jim McDonald THE FUTURE OF ENERGY Strathclyde pioneers renewableEdicinE Snapshot the reSearcher Following a decade of environmental research in her native egypt, nabila saleem

Mottram, Nigel

445

Power America  

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

Power America will focus on wide bandgap (WBG) semiconductors - the same materials used in LED light fixtures and many flat screen TVs. The Institute will use $70 million provided by the U.S. Department of Energy's Advanced Manufacturing Office to support and manage its programs over the next five years. This Institute is one of three new innovation hubs announced by President Obama in his 2013 State of the Union address and part of the National Network for Manufacturing Innovation (NNMI). Power America was formerly called the Next Generation Power Electronics National Manufacturing Innovation Institute.

446

American Recovery and Reinvestment Act (ARRA) FEMP Technical Assistance Federal Aviation Administration Project 209 Control Tower and Support Building Oakland, CA  

SciTech Connect

This report represents findings of a design review team that evaluated construction documents (at the 70% level) and operating specifications for a new control tower and support building that will be build at Oakland, California by the Federal Aviation Administration (FAA). The focus of the review was to identify measures that could be incorporated into the final design and operating specification that would result in additional energy savings for the FAA that would not have otherwise occurred.

Arends, J.; Sandusky, William F.

2010-03-01T23:59:59.000Z

447

American Recovery and Reinvestment Act (ARRA) FEMP Technical Assistance Federal Aviation Administration Project 209 - Control Tower and Support Building, Las Vegas, NV  

SciTech Connect

This report represents findings of a design review team that evaluated construction documents (at the 70% level) and operating specifications for a new control tower and support building that will be built in Las Vegas, Nevada by the Federal Aviation Administration (FAA). The focus of the review was to identify measures that could be incorporated into the final design and operating specification that would result in additional energy savings for the FAA that would not have otherwise occurred.

Arends, J.; Sandusky, William F.

2010-03-31T23:59:59.000Z

448

Power Projects  

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

Power Projects Power Projects Contact SN Customers Environmental Review-NEPA Operations & Maintenance Planning & Projects Power Marketing Rates You are here: SN Home page > About SNR Power Projects Central Valley: In California's Central Valley, 18 dams create reservoirs that can store 13 million acre-feet of water. The project's 615 miles of canals irrigate an area 400 miles long and 45 miles wide--almost one third of California. Powerplants at the dams have an installed capacity of 2,099 megawatts and provide enough energy for 650,000 people. Transmission lines total about 865 circuit-miles. Washoe: This project in west-central Nevada and east-central California was designed to improve the regulation of runoff from the Truckee and Carson river systems and to provide supplemental irrigation water and drainage, as well as water for municipal, industrial and fishery use. The project's Stampede Powerplant has a maximum capacity of 4 MW.

449

Power Struggle  

Science Journals Connector (OSTI)

Disparate forces such as hydraulic fracturing, or fracking, in the U.S.; the phaseout of nuclear power in Germany; and renewable energy promotion in Europe are conspiring to lessen ... ...

ALEX SCOTT

2013-12-09T23:59:59.000Z

450

Concentrating Solar Power (Fact Sheet), SunShot Initiative, U...  

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

concentrating reflectors. The laboratories also perform resource assessment of accurate weather and solar insolation data captured through improved satellite imaging, additional...

451

PowerPoint Presentation  

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

Hardwood Forest Hardwood Forest Year: 2000 Site: CHEQ (Wisconsin, USA) Biome: Mixed Forest Day of Year 0 60 120 180 240 300 360 LAI (m 2 m -2 ) 0 1 2 3 4 5 Hardwood Year: 2000 Site: CHEQ (Wisconsin, USA) Biome: Mixed Forest BigFoot Meteorological Inputs Precipitation (cm) 0 60 120 180 240 300 360 0 1 2 3 4 5 6 Minimum Temperature ( o C) 0 60 120 180 240 300 360 -40 -20 0 20 40 Maximum Temperature ( o C) 0 60 120 180 240 300 360 -20 -10 0 10 20 30 40 Vapor Pressure Deficit (kPa) Day of Year 0 60 120 180 240 300 360 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 Shortwave Radiation (MJ m -2 d -1 ) Day of Year 0 60 120 180 240 300 360 0 5 10 15 20 25 30 PAR (MJ m -2 d -1 ) Day of Year 0 60 120 180 240 300 360 0 2 4 6 8 10 12 14 16 Year: 2000 Site: CHEQ (Wisconsin, USA) Biome: Mixed Forest BigFoot GPP Comparison BigFoot vs. Tower Day of Year 0 60 120 180 240 300 360 GPP (gC m -2 d -1 ) 0 2 4 6 8 10 Tower BigFoot Tower GPP (gC m

452

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

Open Energy Info (EERE)

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

453

Impact of a 1,000-foot thermal mixing zone on the steam electric power industry  

SciTech Connect

Thermal discharge requirements for power plants using once-through cooling systems are based on state water quality standards for temperatures that must be met outside of designated mixing zones. This study evaluates the impact of limiting the extent of thermal mixing zones. This study evaluates the impact of limiting the extent of thermal mixing zones to no more than 1,000 feet from the discharge point. Data were collected from 79 steam electric plants. Of the plants currently using once-through cooling systems, 74% could not meet current thermal standards at the edge of a 1,000-foot mixing zone. Of this total, 68% would retrofit cooling towers, and 6% would retrofit diffusers. The estimated nationwide capital cost for retrofitting plants that could not meet current thermal standards at the edge of a 1,000-foot mixing zone is $21.4 billion. Conversion of a plant from once-through cooling to cooling towers or addition of diffusers would result in a lower energy output from that plant. For the affected plants, the total estimated replacement cost would be $370 to $590 million per year. Some power companies would have to construct new generating capacity to meet the increased energy demand. The estimated nationwide cost of this additional capacity would be $1.2 to $4.8 billion. In addition to the direct costs associated with compliance with a 1,000-foot mixing zone limit, other secondary environmental impacts would also occur. Generation of the additional power needed would increase carbon dioxide emissions by an estimated 8.3 million tons per year. In addition, conversion from once-through cooling systems to cooling towers at affected plants would result in increased evaporation of about 2.7 million gallons of water per minute nationwide.

Veil, J.A.

1994-04-01T23:59:59.000Z

454

Lawrence Livermore National Laboratory (LLNL) Experimental Test Site (Site 300) Salinity Evaluation and Minimization Plan for Cooling Towers and Mechanical Equipment Discharges  

SciTech Connect

This document was created to comply with the Central Valley Regional Water Quality Control Board (CVRWQCB) Waste Discharge Requirement (Order No. 98-148). This order established new requirements to assess the effect of and effort required to reduce salts in process water discharged to the subsurface. This includes the review of technical, operational, and management options available to reduce total dissolved solids (TDS) concentrations in cooling tower and mechanical equipment water discharges at Lawrence Livermore National Laboratory's (LLNL's) Experimental Test Site (Site 300) facility. It was observed that for the six cooling towers currently in operation, the total volume of groundwater used as make up water is about 27 gallons per minute and the discharge to the subsurface via percolation pits is 13 gallons per minute. The extracted groundwater has a TDS concentration of 700 mg/L. The cooling tower discharge concentrations range from 700 to 1,400 mg/L. There is also a small volume of mechanical equipment effluent being discharged to percolation pits, with a TDS range from 400 to 3,300 mg/L. The cooling towers and mechanical equipment are maintained and operated in a satisfactory manner. No major leaks were identified. Currently, there are no re-use options being employed. Several approaches known to reduce the blow down flow rate and/or TDS concentration being discharged to the percolation pits and septic systems were reviewed for technical feasibility and cost efficiency. These options range from efforts as simple as eliminating leaks to implementing advanced and innovative treatment methods. The various options considered, and their anticipated effect on water consumption, discharge volumes, and reduced concentrations are listed and compared in this report. Based on the assessment, it was recommended that there is enough variability in equipment usage, chemistry, flow rate, and discharge configurations that each discharge location at Site 300 should be considered separately when deciding on an approach for reducing the salt discharge to the subsurface. The smaller units may justify moderate changes to equipment, and may benefit from increased cleaning frequencies, more accurate and suitable chemical treatment, and sources of make up water and discharge re-use. The larger cooling towers would be more suitable for automated systems where they don't already exist, re-circulation and treatment of blow down water, and enhanced chemical dosing strategies. It may be more technically feasible and cost efficient for the smaller cooling towers to be replaced by closed loop dry coolers or hybrid towers. There are several potential steps that could be taken at each location to reduce the TDS concentration and/or water use. These include: sump water filtration, minimization of drift, accurate chemical dosing, and use of scale and corrosion coupons for chemical calibration. The implementation of some of these options could be achieved by a step-wise approach taken at two representative facilities. Once viable prototype systems have been proven in the field, systematic implementation should proceed for the remaining systems, with cost, desired reduction, and general feasibility taken into consideration for such systems.

Daily III, W D

2010-02-24T23:59:59.000Z

455

Power inverters  

DOE Patents (OSTI)

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

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

2011-11-15T23:59:59.000Z

456

Laboratory modeling of the interaction of vapor-air plumes from cooling towers with jets from the ventilation pipes of atomic electric power plants  

Science Journals Connector (OSTI)

We present experimental results obtained with the help of optical methods. We determined the position of the effective source of ejections and the boundaries of the zone of the interaction of streams.

N. I. Lemesh; L. A. Senchuk

457

Optimizing Cooling Tower Performance Refrigeration Systems, Chemical Plants, and Power Plants All Have A Resource Quietly Awaiting Exploitation-Cold Water!!  

E-Print Network (OSTI)

cooling water rate could be used to proquce approximately 1000 additional bbl (159 m 3 ) Iday of lead-free. high-octane gasoline. The savings in plot area and new construction would more than offset the labor and materials invoived in excavating.... This rejected heat must be continuously removed at the same rate it is generated or the compressor will overheat and shut down. Reducing the operating temperature of the compressor will proportionately reduce the energy input requirements. In other words...

Burger, R.

458

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

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

Power Right. Power Smart. Efficient Computer Power Supplies and Power Right. Power Smart. Efficient Computer Power Supplies and Monitors. Power Right. Power Smart. Efficient Computer Power Supplies and Monitors. March 10, 2009 - 6:00am Addthis John Lippert Power supplies convert the AC power that you get from your electric company into the DC power consumed by most electronics, including your computer. We expect our power supplies to be safe, reliable, and durable. If they meet those criteria, then they're all alike, except for cost, right? Well, not exactly. You see, there's one other important feature that sets them apart: efficiency. And I don't know about you, but I believe waste is bad. For me, high efficiency is one important feature that's needed for something to be high quality. So isn't it ridiculous that most power

459

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

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

Power Right. Power Smart. Efficient Computer Power Supplies and Power Right. Power Smart. Efficient Computer Power Supplies and Monitors. Power Right. Power Smart. Efficient Computer Power Supplies and Monitors. March 10, 2009 - 6:00am Addthis John Lippert Power supplies convert the AC power that you get from your electric company into the DC power consumed by most electronics, including your computer. We expect our power supplies to be safe, reliable, and durable. If they meet those criteria, then they're all alike, except for cost, right? Well, not exactly. You see, there's one other important feature that sets them apart: efficiency. And I don't know about you, but I believe waste is bad. For me, high efficiency is one important feature that's needed for something to be high quality. So isn't it ridiculous that most power

460

Star Power  

SciTech Connect

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

None

2014-10-17T23:59:59.000Z

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


461

Solar Power  

Science Journals Connector (OSTI)

...of desert solar energy farm with 30 percent conversion...85 percent of the solar farm energy now reflected back...Washington, D.C. 20550. Wind Power Martin Wolf (19...counting the cost of the offshore platforms, would thus...15 billion. If these wind generators were placed...

Paul E. Damon

1974-08-09T23:59:59.000Z

462

Star Power  

ScienceCinema (OSTI)

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

None

2014-11-18T23:59:59.000Z

463

Power Factor Compensation (PFC) Power Factor Compensation  

E-Print Network (OSTI)

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

Knobloch,Jürgen

464

NETL: Water-Energy Interface - Power Plant Water Management  

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

Nanofiltration Treatment Options for Thermoelectric Power Plant Water Treatment Demands Nanofiltration Treatment Options for Thermoelectric Power Plant Water Treatment Demands Sandia National Laboratories (SNL) is conducting a study on the use of nanofiltration (NF) treatment options to enable use of non-traditional water sources as an alternative to freshwater make-up for thermoelectric power plants. The project includes a technical and economic evaluation of NF for two types of water that contain moderate to high levels of total dissolved solids (TDS): (1) cooling tower recirculating water and (2) produced waters from oil & gas extraction operations. Reverse osmosis (RO) is the most mature and commonly considered option for high TDS water treatment. However, RO is generally considered to be too expensive to make treatment of produced waters for power plant use a feasible application. Therefore, SNL is investigating the use of NF, which could be a more cost effective treatment option than RO. Similar to RO, NF is a membrane-based process. Although NF is not as effective as RO for the removal of TDS (typical salt rejection is ~85 percent, compared to >95 percent for RO), its performance should be sufficient for typical power plant applications. In addition to its lower capital cost, an NF system should have lower operating costs because it requires less pressure to achieve an equivalent flux of product water.

465

Power superconducting power transmission cable  

DOE Patents (OSTI)

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

Ashworth, Stephen P. (Cambridge, GB)

2003-01-01T23:59:59.000Z

466

Power Search  

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

You are here: Find a Car Home > Power Search You are here: Find a Car Home > Power Search Power Search Expand any feature by selecting its title bar. Choose as many or as few features as you like. Model Year From: 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 To: 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 MSRP Under $15,000 $15,000-$20,000 $20,000-$25,000 $25,000-$30,000 $30,000-$35,000 $35,000-$40,000 $40,000-$45,000 $45,000-$50,000 $50,000-$55,000 $55,000-$60,000 $60,000-$65,000 $65,000-$70,000 $70,000-$75,000 $75,000-$80,000 $80,000-$85,000 Over $85,000 - OR - Minimum: Select... $5,000 $6,000 $7,000 $8,000 $9,000 $10,000 $11,000

467

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

Energy Savers (EERE)

lot of the electricity they consume? Higher efficiency power supplies reduce energy consumption, thus cutting your electricity bill. They reduce power consumption, helping your...

468

American Recovery and Reinvestment Act (ARRA) FEMP Technical Assistance Federal Aviation Administration Project 209 Control Tower and Support Building, Reno, Nevada  

SciTech Connect

Pacific Northwest National Laboratory (PNNL) and Redhorse Corporation (Redhorse) conducted an energy audit on the Federal Aviation Administration (FAA) control tower and base building in Reno, Nevada. This report presents the findings of the energy audit team that evaluated construction documents and operating specifications (at the 100% level) and completed a site visit. The focus of the review was to identify measures that could be incorporated into the final design and operating specifications that would result in additional energy savings for the FAA that would not have otherwise occurred.

Arends, J.; Sandusky, William F.

2010-06-30T23:59:59.000Z

469

Two Real Discoveries That Bring Spider Powers to Our Universe | Department  

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

Two Real Discoveries That Bring Spider Powers to Our Universe Two Real Discoveries That Bring Spider Powers to Our Universe Two Real Discoveries That Bring Spider Powers to Our Universe July 3, 2012 - 10:36am Addthis Argonne Lab researchers used the Advanced Photon Source to look at the structure of spider's dragline silk, which allows arachnids to swing from branches and dangle from window frames, the Spiderman equivalent of swinging from high buildings and dangling from Gotham’s towers. | Creative Commons photo by Flickr user Djumbo. Argonne Lab researchers used the Advanced Photon Source to look at the structure of spider's dragline silk, which allows arachnids to swing from branches and dangle from window frames, the Spiderman equivalent of

470

PowerPoint Presentation  

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

Conifer Forest Conifer Forest Year: 2002 Site: METL (Oregon, USA) Biome: Conifer Forest Day of Year 0 60 120 180 240 300 360 LAI (m 2 m -2 ) 0.0 0.5 1.0 1.5 2.0 Conifer Year: 2002 Site: METL (Oregon, USA) Biome: Conifer Forest BigFoot Meteorological Inputs Precipitation (cm) 0 60 120 180 240 300 360 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Minimum Temperature ( o C) 0 60 120 180 240 300 360 -20 -10 0 10 20 30 40 Maximum Temperature ( o C) 0 60 120 180 240 300 360 -10 0 10 20 30 40 Vapor Pressure Deficit (kPa) Day of Year 0 60 120 180 240 300 360 0 1 2 3 4 Shortwave Radiation (MJ m -2 d -1 ) Day of Year 0 60 120 180 240 300 360 0 5 10 15 20 25 30 35 PAR (MJ m -2 d -1 ) Day of Year 0 60 120 180 240 300 360 0 2 4 6 8 10 12 14 16 18 Year: 2002 Site: METL (Oregon, USA) Biome: Conifer Forest BigFoot GPP Comparison BigFoot vs. Tower Day of Year 0 60 120 180 240 300 360 GPP (gC m -2 d -1 ) 0 1 2 3 4 5 6 Tower BigFoot Tower GPP (gC m

471

Wind power and Wind power and  

E-Print Network (OSTI)

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

472

Power Recovery  

E-Print Network (OSTI)

) - 2,870,000 x 0.8 6 W - 3414 = 70 kw (or 900 hp). When recovering power from an expanding gas, consideration should be given to the final gas temperature. This tem;:>f'rature can be estimated by the formula: T 2 Final temperature, oR. Other... with the requirements make generation fqr more useful. Presently a recovery level of around 500 kw (or 657 hp) appears to be the minimum level which will support an in stallation. In order to achieve reasonable effi ciency, quality equipment with good control...

Murray, F.

473

Subdue solids in towers  

SciTech Connect

Many distillation, absorption, and stripping columns operate with solids present in the system. The presence of solids may be either intentional or unintentional. But, in all cases, the solids must be handled or tolerated by the vapor/liquid mass-transfer equipment. Such solids should be dealt with by a combination of four methods. From most favorable to least favorable, these are: (1) keep the solids out; (2) keep the solids moving; (3) put the solids somewhere harmless; and (4) make it easier to clean the hardware. The key precept for all these approaches is the realization that solids present in a system just don't disappear. In this article, the authors review the techniques and design issues involved in making a vapor/liquid mass-transfer system operate with solids present. They assume that the solids cannot be kept out, eliminating the first choice. The type of mass-transfer service does not matter. The same principles apply equally well to distillation, adsorption, and stripping. They include equipment design criteria based on the methods outlined above, as well as detailed recommendations for each of the major equipment choices that can be made for mass-transfer devices. Then, they illustrate the approach via an example--a vinyl chloride monomer (VCM) unit having solids as an inherent part of its feed.

Sloley, A.W.; Martin, G.R.

1995-01-01T23:59:59.000Z

474

Education Tower Emergency Instructions  

E-Print Network (OSTI)

Security at 403-220-5333 from a safe location Hazardous Materials Spill Only attempt to clean up a spill to an armed assailant, run away from the subject Hide - if you cannot flee, or do not know the location of the shooter, hide in a locked or barricaded room and turn out the lights Fight ­ if confronted by the shooter

de Leon, Alex R.

475

Test and evaluation of a solar powered gas turbine system  

Science Journals Connector (OSTI)

This paper describes the test and the results of a first prototype solar powered gas turbine system, installed during 2002 in the CESA-1 tower facility at Plataforma Solar de Almera (PSA) in Spain. The main goals of the project were to develop a solar receiver cluster able to provide pressurized air of 1000C and solve the problems arising from the coupling of the receivers with a conventional gas turbine to demonstrate the operability of the system. The test set-up consists of the heliostat field of the CESA-1 facility providing the concentrated solar power, a pressurized solar receiver cluster of three modules of 400kWth each which convert the solar power into heat, and a modified helicopter engine (OST3) with a generator coupled to the grid. The first test phase at PSA started in December 2002 with the goal to reach a temperature level of 800C at the combustor air inlet by the integration of solar energy. This objective was achieved by the end of this test phase in March 2003, and the system could be operated at 230kWe power to grid without major problems. In the second test phase from June 2003 to August 2003 the temperature level was increased to almost 1000C. The paper describes the system configuration, the component efficiencies and the operation experiences of the first 100h of solar operation of this very successful first test of a solar operated Brayton gas turbine system.

Peter Heller; Markus Pfnder; Thorsten Denk; Felix Tellez; Antonio Valverde; Jess Fernandez; Arik Ring

2006-01-01T23:59:59.000Z

476

Power transaction issues in deregulated power systems  

E-Print Network (OSTI)

With the introduction of the deregulation in the power industry, it becomes possible to wheel power across the transmission network. Hence, some issues involving the network's physical capability to transfer power and the allocation of the network...

Roycourt, Henrik

2012-06-07T23:59:59.000Z

477

Acoustic Imaging Evaluation of Juvenile Salmonid Behavior in the Immediate Forebay of the Water Temperature Control Tower at Cougar Dam, 2010  

SciTech Connect

This report presents the results of an evaluation of juvenile Chinook salmon (Oncorhynchus tshawytscha) behavior at Cougar Dam on the south fork of the McKenzie River in Oregon in 2010. The study was conducted by the Pacific Northwest National Laboratory for the U.S. Army Corps of Engineers (USACE). The overall goal of the study was to characterize juvenile salmonid behavior and movement patterns in the immediate forebay of the Water Temperature Control (WTC) tower of the dam for USACE and fisheries resource managers use in making decisions about bioengineering designs for long-term structures and/or operations to facilitate safe downstream passage for juvenile salmonids. We collected acoustic imaging (Dual-Frequency Identification Sonar; DIDSON) data from March 1, 2010, through January 31, 2011. Juvenile salmonids (hereafter, called 'fish') were present in the immediate forebay of the WTC tower throughout the study. Fish abundance index was low in early spring (<200 fish per sample-day), increased in late April, and peaked on May 19 (6,039 fish). A second peak was observed on June 6 (2904 fish). Fish abundance index decreased in early June and remained low in the summer months (<100 fish per sample-day). During the fall and winter, fish numbers varied with a peak on November 10 (1881 fish) and a minimum on December 7 (12 fish). A second, smaller, peak occurred on December 22 (607 fish). A univariate statistical analysis indicated fish abundance index (log10-transformed) was significantly (P<0.05) positively correlated with forebay elevation, velocity over the WTC tower intake gate weirs, and river flows into the reservoir. A subsequent multiple regression analysis resulted in a model (R2=0.70) predicting fish abundance (log-transformed index values) using two independent variables of mean forebay elevation and the log10 of the forebay elevation range. From the approximate fish length measurements made using the DIDSON imaging software, the average fish length during early spring 2010 was 214 {+-} 86 mm (standard deviation). From May through early November, the average fish length remained relatively consistent (132 {+-} 54 mm), after which average lengths increased to 295 {+-} 148 mm for mid-November though early December. From mid-December through January the average fish length decreased to 151 {+-} 76 mm. Milling in front of the WTC tower was the most common fish behavior observed throughout the study period. Traversing along the front of the tower, east-to-west and west-to-east, was the next common behavior. The percentage of fish events showing movement from the forebay to the tower or from the tower to the forebay was generally low throughout the spring, summer, and early fall (0 to 30% for both directions combined, March through early November). From mid-November 2010 through the end of the study (January 31, 2011), the combined percentages of fish moving into and out of the tower were higher (25 to 70%) than during previous months of the study. Schooling behavior was most distinct in the spring. Schooling events were present in 30 to 96% of the fish events during that period, with a peak on May 19. Schooling events were also present in the summer, but at lower numbers. With the exception of some schooling in mid-December, few to no schooling events were observed in the fall and winter months. Diel distributions for schooling fish during spring and fall months indicate schooling was concentrated during daylight hours and no schooling was observed at night. However, in December, schooling occurred at night, after midnight, and during daylight hours. Predator activity, most likely bull trout or rainbow trout according to a USACE biologist, was observed during late spring, when fish abundance index and schooling were highest for the year, and again in the fall months when fish events increased from a summer low. No predator activity was observed in the summer, and little activity occurred during the winter months.

Khan, Fenton; Johnson, Gary E.; Royer, Ida M.; Phillips, Nathan RJ; Hughes, James S.; Fischer, Eric S.; Ham, Kenneth D.; Ploskey, Gene R.

2012-04-01T23:59:59.000Z

478

Diode pumped solid state kilohertz disk laser system for time-resolved combustion diagnostics under microgravity at the drop tower Bremen  

SciTech Connect

We describe a specially designed diode pumped solid state laser system based on the disk laser architecture for combustion diagnostics under microgravity (?g) conditions at the drop tower in Bremen. The two-stage oscillator-amplifier-system provides an excellent beam profile (TEM{sub 00}) at narrowband operation (?? < 1 pm) and is tunable from 1018 nm to 1052 nm. The laser repetition rate of up to 4 kHz at pulse durations of 10 ns enables the tracking of processes on a millisecond time scale. Depending on the specific issue it is possible to convert the output radiation up to the fourth harmonic around 257 nm. The very compact laser system is integrated in a slightly modified drop capsule and withstands decelerations of up to 50 g (>11 ms). At first the concept of the two-stage disk laser is briefly explained, followed by a detailed description of the disk laser adaption to the drop tower requirements with special focus on the intended use under ?g conditions. In order to demonstrate the capabilities of the capsule laser as a tool for ?g combustion diagnostics, we finally present an investigation of the precursor-reactions before the droplet ignition using 2D imaging of the Laser Induced Fluorescence of formaldehyde.

Wagner, Volker; Paa, Wolfgang; Triebel, Wolfgang [Institute of Photonic Technology, Laser Diagnostics, Albert-Einstein-Str. 9, 07745 Jena (Germany)] [Institute of Photonic Technology, Laser Diagnostics, Albert-Einstein-Str. 9, 07745 Jena (Germany); Eigenbrod, Christian; Klinkov, Konstantin [Center of Applied Space Technology and Microgravity, University Bremen, Am Fallturm, 28359 Bremen (Germany)] [Center of Applied Space Technology and Microgravity, University Bremen, Am Fallturm, 28359 Bremen (Germany); Larionov, Mikhail; Giesen, Adolf; Stolzenburg, Christian [Institut fr Strahlwerkzeuge (IFSW), Pfaffenwaldring 43, 70569 Stuttgart (Germany)] [Institut fr Strahlwerkzeuge (IFSW), Pfaffenwaldring 43, 70569 Stuttgart (Germany)

2014-03-15T23:59:59.000Z

479

USE OF COAL DRYING TO REDUCE WATER CONSUMED IN PULVERIZED COAL POWER PLANTS  

SciTech Connect

U.S. low rank coals contain relatively large amounts of moisture, with the moisture content of subbituminous coals typically ranging from 15 to 30 percent and that for lignites from 25 and 40 percent. High fuel moisture has several adverse impacts on the operation of a pulverized coal generating unit, for it can result in fuel handling problems and it affects heat rate, stack emissions and maintenance costs. Theoretical analyses and coal test burns performed at a lignite fired power plant show that by reducing the fuel moisture, it is possible to improve boiler performance and unit heat rate, reduce emissions and reduce water consumption by the evaporative cooling tower. The economic viability of the approach and the actual impact of the drying system on water consumption, unit heat rate and stack emissions will depend critically on the design and operating conditions of the drying system. The present project evaluated the low temperature drying of high moisture coals using power plant waste heat to provide the energy required for drying. Coal drying studies were performed in a laboratory scale fluidized bed dryer to gather data and develop models on drying kinetics. In addition, analyses were carried out to determine the relative costs and performance impacts (in terms of heat rate, cooling tower water consumption and emissions) of drying along with the development of optimized drying system designs and recommended operating conditions.

Edward K. Levy; Nenad Sarunac; Harun Bilirgen; Hugo Caram

2006-03-01T23:59:59.000Z

480

ELECTROCHEMICAL POWER FOR TRANSPORTATION  

E-Print Network (OSTI)

and Battery-Electric Powered Special Purpose Vehicles, SAELead-Acid Powered Electric Vehicles, Fifth Internationalmeantime, battery-powered electric vehicles can be expected

Cairns, Elton J.

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "reflector power tower" 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

Southwestern Power Administration  

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

Courses Instructors NERC Continuing Education Power Operations Training Center You'll find the "Power" of learning at Southwestern's Power Operations Training Center (POTC). POTC's...

482

Southwestern Power Administration  

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

Rate Schedules Skip Navigation Links Excess Energy Hydro Peaking Power Hydro Power and Energy Sold to Sam Rayburn Dam Electric Cooperative (Rayburn) Hydro Power and Energy Sold to...

483

2025 Power Marketing Initiative  

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

Power Allocations Rates 2025 Power Marketing Initiative The Loveland Area Projects (LAP) Firm Electric Service (FES) contracts expire September 30, 2024. Western Area Power...

484

Power management system  

DOE Patents (OSTI)

A method of managing power resources for an electrical system of a vehicle may include identifying enabled power sources from among a plurality of power sources in electrical communication with the electrical system and calculating a threshold power value for the enabled power sources. A total power load placed on the electrical system by one or more power consumers may be measured. If the total power load exceeds the threshold power value, then a determination may be made as to whether one or more additional power sources is available from among the plurality of power sources. At least one of the one or more additional power sources may be enabled, if available.

Algrain, Marcelo C. (Peoria, IL); Johnson, Kris W. (Washington, IL); Akasam, Sivaprasad (Peoria, IL); Hoff, Brian D. (East Peoria, IL)

2007-10-02T23:59:59.000Z

485

Assessment of the suitability of agricultural waste water for geothermal power plant cooling in the Imperial Valley. I. Water quality  

SciTech Connect

Evaluation of the quality of agricultural waste water is the first step in assessing the sitability of agricultural waste water for geothermal power plant cooling. In this study samples of agricultural waste water from the New and Alamo rivers located in the Imperial Valley of California are analyzed. Determinations of standard water quality parameters, solids content, and inorganic compositions of the solids are made. The results are compared with data on samples of irrigation water and steam condensate also obtained from sites in the Imperial Valley. The data are evaluated in relation to cooling tower operation, waste generation, and waste disposal.

Morris, W.F.; Rigdon, L.P.

1981-09-01T23:59:59.000Z

486

Natural Gas Power  

Science Journals Connector (OSTI)

The purpose of a power plant is to generate electric power. Therefore, the key performance metric of an electric power generator is the net thermal efficiency, which is the ratio of the electric power measured...

Raub W. Smith; Dr. S. Can Glen

2012-01-01T23:59:59.000Z

487

Solar powered desalination system  

E-Print Network (OSTI)

1.18: Largest PV Power Plants32 TableTable 1.18: Largest PV Power Plants 19 Power (MW) LocationWorld Canada, Sarnia PV power plant Sarnia (Ontario) Italy,

Mateo, Tiffany Alisa

2011-01-01T23:59:59.000Z

488

PowerPoint Presentation  

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

Computer networks Local power network Local Power network Local Power network Bulk Power Grid Low-level security domain Medium-level security domain High-level security domain...

489

Water Power Program: Publications  

Energy Savers (EERE)

Water Power Program HOME ABOUT RESEARCH & DEVELOPMENT FINANCIAL OPPORTUNITIES INFORMATION RESOURCES NEWS EVENTS EERE Water Power Program Information Resources Publications...

490

High-power microwave transmission systems for electron-cyclotron-resonance plasma heating  

SciTech Connect

This progress report is for the sixth year of a grant from the US Department of Energy for the design, development, and fabrication of ECRH transmission and mode conversion systems to transport microwave power from a gyrotron to a magnetically confined plasma. The design and low-power testing of new and improved components for such systems and development of underlying theory is the focus of this project. Devising and improving component testing and diagnostic techniques is also an important part of this effort. The development of possible designs for sections of gyrotrons themselves, such as tapers or Vlasov-type launchers, in support of the Varian gyrotron development program is also considered when appropriate. We also provide support to other groups working on ECR heating of magnetically confined plasmas such as the groups at General Atomics, the University of Texas at Austin, and Lawrence Livermore National Laboratory. During the last year, we designed and had fabricated a two-dimensional Vlasov antenna system for a 110 GHz TE{sub 15,2} mode gyrotron for possible use at General Atomics. The system included the launcher section, a visor, main reflector, and focusing reflector. Programs to generate the tool-path profiles to cut the General Atomics'' Vlasov components on a milling machine were developed. We have also developed state-of-the art theory and programs for three-dimensional whispering-gallery-mode Vlasov antenna systems. A design for a 110 GHz TE{sub 01}-TE{sub 15,2} mode converter system for cold testing WGM Vlasov antenna systems was developed and is currently being fabricated also.

Vernon, R.J.

1991-08-01T23:59:59.000Z

491

USE OF COAL DRYING TO REDUCE WATER CONSUMED IN PULVERIZED COAL POWER PLANTS  

SciTech Connect

This is the ninth Quarterly Report for this project. The background and technical justification for the project are described, including potential benefits of reducing fuel moisture using power plant waste heat, prior to firing the coal in a pulverized coal boiler. During this last Quarter, comparative analyses were performed for lignite and PRB coals to determine how unit performance varies with coal product moisture. Results are given showing how the coal product moisture level and coal rank affect parameters such as boiler efficiency, station service power needed for fans and pulverizers and net unit heat rate. Results are also given for the effects of coal drying on cooling tower makeup water and comparisons are made between makeup water savings for various times of the year.

Edward Levy; Nenad Sarunac; Harun Bilirgen; Wei Zhang

2005-04-01T23:59:59.000Z

492

RECIPIENT:Desert Research Institute STATE:NV PROJECT Tall Tower Wind Energy Monitoring and Numerical Model Validation in Southern Nevada; NREl Tracking  

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

Desert Research Institute STATE:NV Desert Research Institute STATE:NV PROJECT Tall Tower Wind Energy Monitoring and Numerical Model Validation in Southern Nevada; NREl Tracking TITLE: No. 11-012 Funding Opportunity Announcement Number Procurement Instrument Number NEPA Control Number CID Number NREl-11-012 G010337 Based on my review of the information concerning the proposed action, as NEPA CompHance Officer (authorized under DOE Order 451.1A), I have made the following determination: CX, EA, EIS APPENDIX AND NUMBER: Description: A9 Information gathering (including, but not limited to, literature surveys, inventories, audits), data analYSis (including computer modeling), document preparation (such as conceptual deSign or feasibility studies, analytical energy supply and demand studies), and dissemination (including, but not limited to, document mailings, publication, and distribution;

493

INVELOX: Description of a new concept in wind power and its performance evaluation  

Science Journals Connector (OSTI)

Abstract A new concept in wind power harnessing is described which significantly outperforms traditional wind turbines of the same diameter and aerodynamic characteristics under the same wind conditions and it delivers significantly higher output, at reduced cost. Its first innovative feature is the elimination of tower-mounted turbines. These large, mechanically complex turbines, and the enormous towers used to hoist them into the sky, are the hallmark of today's wind power industry. They are also expensive, unwieldy, inefficient, and hazardous to people and wildlife. The second innovative feature of INVELOX is that it captures wind flow through an omnidirectional intake and thereby there is no need for a passive or active yaw control. Third, it accelerates the flow within a shrouded Venturi section which is subsequently expanded and released into the ambient environment through a diffuser. In addition, INVELOX provides solutions to all the major problems that have so far undermined the wind industry, such as low turbine reliability, intermittency issues and adverse environmental and radar impact. Simulating the performance of this wind delivery system is quite challenging because of the complexity of the wind delivery system and its interaction with wind at the front end and with a turbine at the back end. The objectives of the present work are to model and understand the flow field inside the INVELOX where the actual wind turbine is located as well the external flow field which not only provides the intake flow but also has to match the exhaust flow of the system. The present computations involved cases with different incoming wind directions and changes in the intake geometry. The results show that it is possible to capture, accelerate and concentrate the wind. Increased wind velocities result in significant improvement in the power output. These results led to the design of a demonstration facility which has provided actual data which verified the significantly increased power expectations.

Daryoush Allaei; Yiannis Andreopoulos

2014-01-01T23:59:59.000Z

494

ZPR-3 Assembly 11 : A cylindrical sssembly of highly enriched uranium and depleted uranium with an average {sup 235}U enrichment of 12 atom % and a depleted uranium reflector.  

SciTech Connect

Over a period of 30 years, more than a hundred Zero Power Reactor (ZPR) critical assemblies were constructed at Argonne National Laboratory. The ZPR facilities, ZPR-3, ZPR-6, ZPR-9 and ZPPR, were all fast critical assembly facilities. The ZPR critical assemblies were constructed to support fast reactor development, but data from some of these assemblies are also well suited for nuclear data validation and to form the basis for criticality safety benchmarks. A number of the Argonne ZPR/ZPPR critical assemblies have been evaluated as ICSBEP and IRPhEP benchmarks. Of the three classes of ZPR assemblies, engineering mockups, engineering benchmarks and physics benchmarks, the last group tends to be most useful for criticality safety. Because physics benchmarks were designed to test fast reactor physics data and methods, they were as simple as possible in geometry and composition. The principal fissile species was {sup 235}U or {sup 239}Pu. Fuel enrichments ranged from 9% to 95%. Often there were only one or two main core diluent materials, such as aluminum, graphite, iron, sodium or stainless steel. The cores were reflected (and insulated from room return effects) by one or two layers of materials such as depleted uranium, lead or stainless steel. Despite their more complex nature, a small number of assemblies from the other two classes would make useful criticality safety benchmarks because they have features related to criticality safety issues, such as reflection by soil-like material. ZPR-3 Assembly 11 (ZPR-3/11) was designed as a fast reactor physics benchmark experiment with an average core {sup 235}U enrichment of approximately 12 at.% and a depleted uranium reflector. Approximately 79.7% of the total fissions in this assembly occur above 100 keV, approximately 20.3% occur below 100 keV, and essentially none below 0.625 eV - thus the classification as a 'fast' assembly. This assembly is Fast Reactor Benchmark No. 8 in the Cross Section Evaluation Working Group (CSEWG) Benchmark Specificationsa and has historically been used as a data validation benchmark assembly. Loading of ZPR-3 Assembly 11 began in early January 1958, and the Assembly 11 program ended in late January 1958. The core consisted of highly enriched uranium (HEU) plates and depleted uranium plates loaded into stainless steel drawers, which were inserted into the central square stainless steel tubes of a 31 x 31 matrix on a split table machine. The core unit cell consisted of two columns of 0.125 in.-wide (3.175 mm) HEU plates, six columns of 0.125 in.-wide (3.175 mm) depleted uranium plates and one column of 1.0 in.-wide (25.4 mm) depleted uranium plates. The length of each column was 10 in. (254.0 mm) in each half of the core. The axial blanket consisted of 12 in. (304.8 mm) of depleted uranium behind the core. The thickness of the depleted uranium radial blanket was approximately 14 in. (355.6 mm), and the length of the radial blanket in each half of the matrix was 22 in. (558.8 mm). The assembly geometry approximated a right circular cylinder as closely as the square matrix tubes allowed. According to the logbook and loading records for ZPR-3/11, the reference critical configuration was loading 10 which was critical on January 21, 1958. Subsequent loadings were very similar but less clean for criticality because there were modifications made to accommodate reactor physics measurements other than criticality. Accordingly, ZPR-3/11 loading 10 was selected as the only configuration for this benchmark. As documented below, it was determined to be acceptable as a criticality safety benchmark experiment. A very accurate transformation to a simplified model is needed to make any ZPR assembly a practical criticality-safety benchmark. There is simply too much geometric detail in an exact (as-built) model of a ZPR assembly, even a clean core such as ZPR-3/11 loading 10. The transformation must reduce the detail to a practical level without masking any of the important features of the critical experiment. And it must do this without increasing the total uncertain

Lell, R. M.; McKnight, R. D.; Tsiboulia, A.; Rozhikhin, Y.; National Security; Inst. of Physics and Power Engineering

2010-09-30T23:59:59.000Z

495

PowerPoint Presentation  

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

of DOE's of DOE's National Recycling Policies Impacts on Portsmouth of Potential Changes to DOE Policies EM SSAB NATIONAL CHAIRS MEETING Deer Creek State Park, Mt. Sterling, Ohio November 5-7, 2013 Jeremy Harley, PE Subject Matter Expert, Portsmouth Gaseous Diffusion Plant EM SSAB NATIONAL CHAIRS MEETING Deer Creek State Park, Mt. Sterling, Ohio November 5-7, 2013 Potential for reuse? Towers Process Motors Transformers Switchgear Cable 1,740 motors 10,000 tons 190 miles 2,000 tons Mixed steel, copper, aluminum 50,000 tons 5,000+ tons Transformers 8,000 tons Potential For Recycle? EM SSAB NATIONAL CHAIRS MEETING Deer Creek State Park, Mt. Sterling, Ohio November 5-7, 2013 Structural Steel 225,000 tons Potential For Recycle? EM SSAB NATIONAL CHAIRS MEETING

496

PowerPoint Presentation  

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

Project Risk Project Risk Management Lessons Learned DOE Risk Management Workshop Harry E. Peters, II, PMP Federal Project Director, Level IV & Chris Murphy Navarro Research and Engineering November 5, 2009 2 Uranium Processing Facility (UPF) * Replaces and consolidates existing enriched uranium manufacturing and processing capabilities into a single modern facility * Improves reliability, security, safety, and operational efficiency * Results in $205 million in life cycle cost savings for Y-12 once operational and protected area can be reduced * Reduces worker internal radiological exposures by 90% * Reduces Y-12's security footprint by 90% 3 Uranium Processing Facility 3 UPF Site Layout Fire water tank & pump 4 UPF HEUMF B e ar C re ek R o a d Cooling Towers Gases Facility Process

497

PowerPoint Presentation  

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

Administration FAA Air Traffic Organization Presented to: Department of Energy Presented by: Mark DeNicuolo, Manager, Performance & Analyses, FAA ATO Safety and Technical Training Date: September 20, 2012 Safety Management 2 * Approximately 50,000 flights per day * En Route centers handle 40.5 million aircraft per year * FAA/contract towers handle: - 51.2 million airport operations - 39 million instrument operations * 732 million passenger enplanements * Over 5,000 civil, public-use airports * Approximately 33,300 ATO employees - More than 15,000 air traffic controllers - More than 7,000 technicians and engineers * 21 ARTCCs, 513 ATCTs, 17 FSSs, 3 AFSSs National Airspace System (NAS) 3 Discipline Domains En Route Terminal FSS Support NDP Totals

498

Dynamic power systems for power generation  

SciTech Connect

The characteristics of dynamic power systems have considerable potential value, especially for the space station. The base of technology that makes these dynamic power systems practical is reviewed. The following types of power-generating systems are examined herein: organic Rankine cycle, potassium Rankine cycle, Brayton cycle, and Stirling cycle.

English, R.E.

1984-04-01T23:59:59.000Z

499

Overhead electric power transmission line jumpering system for bundles of five or more subconductors  

DOE Patents (OSTI)

Jumpering of electric power transmission lines at a dead end tower. Two transmission line conductor bundles each contain five or more spaced apart subconductors (5) arranged in the shape of a cylinder having a circular cross section. The ends of each bundle of subconductors are attached with insulators to a dead end tower (1). Jumpering allows the electric current to flow between the two bundles of subconductors using jumper buses, internal jumper conductors, and external jumper conductors. One or more current collecting jumper buses (37) are located inside each bundle of subconductors with each jumper bus being attached to the end of a subconductor. Small-diameter internal jumper conductors (33) are located in the inherently electrically shielded area inside each bundle of subconductors with each subconductor (except ones having an attached jumper bus) having one internal jumper conductor connected between that subconductor's end and a jumper bus. Large-diameter external jumper conductors (9) are located outside each bundle of subconductors with one or more external jumper conductors being connected between the jumper buses in one bundle of subconductors and the jumper buses in the other bundle.

Winkelman, Paul F. (Beaverton, OR)

1982-01-01T23:59:59.000Z

500

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

SciTech Connect

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

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

2012-04-01T23:59:59.000Z