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Note: This page contains sample records for the topic "tall tower wind" from the National Library of EnergyBeta (NLEBeta).
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1

Assessment of Tall Wind Tower Technology  

Science Conference Proceedings (OSTI)

Technologies that enable wind turbines to capture more energy at a given site have the potential to reduce the overall cost of energy, thereby making wind power more competitive against conventional power generation. Because wind speed generally increases with height above ground, one way to increase energy capture is to elevate the rotor by means of a taller tower. To exploit this potential, a number of tall tower models are under development or have recently been introduced to the wind energy market. I...

2011-11-08T23:59:59.000Z

2

Wind Shear Characteristics at Central Plains Tall Towers: Preprint  

SciTech Connect

Conference paper for WindPower 2006 held June 4-7, 2006, in Pittsburgh, PA, describing the wind shear characteristics at tall tower sites in the Central Plains of the United States.

Schwartz, M.; Elliott, D.

2006-06-01T23:59:59.000Z

3

Wind Shear Characteristics at Central Plains Tall Towers (presentation)  

SciTech Connect

The objectives of this report are: (1) Analyze wind shear characteristics at tall tower sites for diverse areas in the central plains (Texas to North Dakota)--Turbines hub heights are now 70-100 m above ground and Wind measurements at 70-100+ m have been rare. (2) Present conclusions about wind shear characteristics for prime wind energy development regions.

Schwartz, M.; Elliott, D.

2006-06-05T23:59:59.000Z

4

Wind Shear Characteristics at Central Plains Tall Towers  

Science Conference Proceedings (OSTI)

The object of this study is to analyze wind shear characteristics at tall tower sites in the Central Plains of the United States. The hub heights of modern turbines used for wind farm projects are now 70 meters (m) to 100 m above ground and some advanced turbines under development for deployment during the second half of this decade are rated at 2-5 megawatts of energy generation with rotor diameters near 100 m and hub heights of 100-120 m. These advanced turbines will take advantage of the higher wind speeds aloft to generate more wind energy. Specific knowledge of important wind shear characteristics near and at turbine hub height is needed to optimize turbine design and wind farm layout. Unfortunately, wind speed shear measurements at heights of 80-120 m were virtually nonexistent a few years ago and are still quite uncommon today. The Central Plains is a prime wind energy development region and knowledge about the wind shear characteristics will reduce uncertainty about the resource and enhance wind farm design. Previous analyses of tall tower data (Schwartz and Elliott, 2005) concentrated on data from specific states. The wind energy community has recognized the need to fill the gap of direct wind speed measurements at levels 70 m and higher above the ground. Programs instituted during the last 5 years at the state level and supported by the U.S. Department of Energy's (DOE) State Energy Program initiative have placed anemometers and vanes at several levels on existing tall (70 m+) communication towers. The Central Plains has a fairly high concentration of tall tower sites. The distribution of tall tower sites varies among the states in the Central Plains, because the tall tower program is new and the available state and federal funding to establish tall towers is variable. Our wind resource assessment group at DOE's National Renewable Energy Laboratory (NREL) has obtained much of these necessary measurement data from both individual state sources and regional organizations. Most of the data are available to the public, though data from one tower in Colorado are proprietary. We have begun to analyze important wind climate parameters, including wind shear from the tall towers. A total of 13 tall towers were used for this study. Eleven of the towers had the highest anemometer level between 100 m and 113 m. Two towers had the highest measurement level between 70 m and 85 m above ground. The distribution of the towers among the states is: two sites in Texas and Oklahoma; six sites in Kansas; and one site each in Colorado, South Dakota, and North Dakota. Figure 1 shows the locations and names of the thirteen towers. The wind resource at these sites can be classified as ranging from good-to-excellent. Eight tall tower sites have Class 3 resource, four sites have Class 4 resource, and one has Class 5 resource at 50 m.

Schwartz, M.; Elliott, D.

2006-01-01T23:59:59.000Z

5

Wind Profiler and RASS Measurements Compared with Measurements from a 450-m-Tall Tower  

Science Conference Proceedings (OSTI)

A 915-MHz boundary layer wind profiler with radio acoustic sounding system (RASS) was sited 8 km from a very tall (450 m) television transmitting tower in north-central Wisconsin during the spring, summer, and autumn of 1995. The profiler ...

Wayne M. Angevine; Peter S. Bakwin; Kenneth J. Davis

1998-06-01T23:59:59.000Z

6

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

7

Wind shear for large wind turbine generators at selected tall tower sites  

DOE Green Energy (OSTI)

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

8

RECIPIENT:Desert Research Institute STATE:NV PROJECT Tall Tower...  

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

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...

9

Modeling, loading, and preliminary design considerations for tall guyed towers  

Science Conference Proceedings (OSTI)

In this paper, the authors first summarize the results of an investigation they carried out on the collapse of a 1900 ft tall guyed tower under ice and wind loads. Based on this investigation, they then proceed to present some structural analysis recommendations relating to loading and modeling concerns. Special emphasis is placed on the importance of ice loading, and on the level of accuracy required in modeling the nonlinear response behavior. Finally, the conclusions drawn from this study are used to formulate preliminary design guidelines. This facilitates a systematic approach for the design of tall guyed towers. 23 refs.

Gantes, C.; Khoury, R.; Connors, J.J.; Pouangare, C. [Engg Information Technology, Cambridge, MA (United States)

1993-12-01T23:59:59.000Z

10

Wind Energy Assessment and Visualization Laboratory Extra-Tall Tower Wind Resource Assessment: Icing Rules and Trends in the Data.  

E-Print Network (OSTI)

??This study describes the results of the measurement campaign for the Wind Energy Assessment and Visualization Laboratory (WEAV) wind feasibility study in Athens, OH. A… (more)

Harris, James C.

2012-01-01T23:59:59.000Z

11

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;

12

Dynamic characteristics and wind-induced responses of a super tall building.  

E-Print Network (OSTI)

??This thesis describes a combined experimental and numerical investigation of wind effects on a super tall building, Di Wang Tower (325m high with 79 floors)… (more)

Liu, Pengfei (???)

2007-01-01T23:59:59.000Z

13

Wind Energy Assessment Study for Nevada -- Tall Tower Deployment (Stone Cabin): 26 June 2005 - 31 December 2007  

DOE Green Energy (OSTI)

The objective of this work effort was to characterize wind shear and turbulence for representative wind-developable areas in Nevada.

Koracin, D.; Reinhardt, R.; McCurdy, G.; Liddle, M.; McCord, T.; Vellore, R.; Minor, T.; Lyles, B.; Miller, D.; Ronchetti, L.

2009-12-01T23:59:59.000Z

14

FLUX MEASUREMENTS FROM A TALL TOWER IN A COMPLEX LANDSCAPE  

Science Conference Proceedings (OSTI)

The accuracy and representativeness of flux measurements from a tall tower in a complex landscape was assessed by examining the vertical and sector variability of the ratio of wind speed to momentum flux and the ratio of vertical advective to eddy flux of heat. The 30-60 m ratios were consistent with theoretical predictions which indicate well mixed flux footprints. Some variation with sector was observed that were consistent with upstream roughness. Vertical advection was negligible compared with vertical flux except for a few sectors at night. This implies minor influence from internal boundary layers. Flux accuracy is a function of sector and stability but 30-60 m fluxes were found to be generally representative of the surrounding landscape. This paper will study flux data from a 300 m tower, with 4 levels of instruments, in a complex landscape. The surrounding landscape will be characterized in terms of the variation in the ratio of mean wind speed to momentum flux as a function of height and wind direction. The importance of local advection will be assessed by comparing vertical advection with eddy fluxes for momentum and heat.

Kurzeja, R.; Weber, A.; Chiswell, S.; Parker, M.

2010-07-22T23:59:59.000Z

15

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity at Different Sites in California and the Northwest  

E-Print Network (OSTI)

or production data from tall towers are needed before we canmore data from tall anemometer towers or operational wind

Fripp, Matthias; Wiser, Ryan

2006-01-01T23:59:59.000Z

16

An Atmospheric Solitary Gust Observed with a Doppler Radar, a Tall Tower and a Surface Network  

Science Conference Proceedings (OSTI)

Doppler radar and a 444 m tall instrumented tower provide a detailed view of the kinematic and thermodynamic structure of a solitary gust. A study of the data fields, and comparison with theoretical and laboratory work leads to the conclusion ...

Richard J. Doviak; Runsheng Ge

1984-09-01T23:59:59.000Z

17

THE STEEL TOWER: A 21st CENTURY TALL BUILDING.  

E-Print Network (OSTI)

?? This paper outlines the need for a new mixed use high-rise project for the commercial business district of Pittsburgh, Pennsylvania. The proposed tower combines… (more)

Duke, Peter Guldenshuh

2013-01-01T23:59:59.000Z

18

A New Tall-Tower Meteorological Monitoring System  

SciTech Connect

The Atmospheric Technologies Group of the Savannah River Technology Center operates an extensive meteorological monitoring network of 13 tower in and near the Savannah River Site near Aiken, South Carolina. The data from this system are available in ''real-time'' for emergency response atmospheric release modeling and operational weather forecasting.

Parker, M.J.

2003-01-14T23:59:59.000Z

19

WIND DATA REPORT WBZ Tower, Hull, MA  

E-Print Network (OSTI)

WIND DATA REPORT WBZ Tower, Hull, MA 9/1/06-11/30/06 Prepared for Department of Energy (DOE) Golden the closest tower leg The data from the SecondWind Nomad2 logger is emailed to the Renewable Energy Research Energy Research Laboratory Page 10 University of Massachusetts, Amherst Amherst, MA 01003 #12;Wind Speed

Massachusetts at Amherst, University of

20

Hydrogen Storage in Wind Turbine Towers  

DOE Green Energy (OSTI)

Low-cost hydrogen storage is recognized as a cornerstone of a renewables-hydrogen economy. Modern utility-scale wind turbine towers are typically conical steel structures that, in addition to supporting the rotor, could be used to store hydrogen. This study has three objectives: (1) Identify the paramount considerations associated with using a wind turbine tower for hydrogen storage; (2)Propose and analyze a cost-effective design for a hydrogen-storing tower; and (3) Compare the cost of storage in hydrogen towers to the cost of storage in conventional pressure vessels. The paramount considerations associated with a hydrogen tower are corrosion (in the form of hydrogen embrittlement) and structural failure (through bursting or fatigue life degradation). Although hydrogen embrittlement (HE) requires more research, it does not appear to prohibit the use of turbine towers for hydrogen storage. Furthermore, the structural modifications required to store hydrogen in a tower are not cost prohibitive.

Kottenstette, R.; Cotrell, J.

2003-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "tall tower wind" 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

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

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

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.

22

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

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

23

Capacity Assessment of a Transmission Tower under Wind Loading.  

E-Print Network (OSTI)

??Transmission towers play a vital role in power distribution networks and are often subject to strong wind loads. Lattice tower design is often based on… (more)

Mara, Thomas G

2013-01-01T23:59:59.000Z

24

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

25

A virtual tall tower network for understanding continental sources and sinks of CO2  

SciTech Connect

Our understanding of the North American terrestrial carbon cycle is limited by both a lack of continental atmospheric CO2 data, and by a need for methods to interpret these and other continental data with confidence. In response to this challenge a rapid expansion of the N. American carbon cycle observational network is underway. This expansion includes a network of continuous, continental CO2 mixing ratio observations being collected at a subset of AmeriFlux towers. Progress in developing this resource includes instrument development, site installation, calibration and intercalibration efforts, and initiation of a uniform data product. Progess in applying these data include proposed methods for interpreting surface layer measurements in atmospheric inversions (the virtual tall towers approach), examination of coherence patterns in continental mixing ratios in response to weather and climate, and application of these mixing ratio measurements in formal atmospheric inversions. Future work will merge these methods with interpretation of flux towers observations of terrestrial carbon fluxes in an effort to create a single coherent diagnosis of North American terrestrial carbon fluxes over a multi-year period.

Davis, K.J.; Richardson, S.J.; Miles, N.L.

2007-03-09T23:59:59.000Z

26

Atmospheric Stability Impacts on Power Curves of Tall Wind Turbines - An Analysis of a West Coast North American Wind Farm  

SciTech Connect

Tall wind turbines, with hub heights at 80 m or above, can extract large amounts of energy from the atmosphere because they are likely to encounter higher wind speeds, but they face challenges given the complex nature of wind flow and turbulence at these heights in the boundary layer. Depending on whether the boundary layer is stable, neutral, or convective, the mean wind speed, direction, and turbulence properties may vary greatly across the tall turbine swept area (40 to 120 m AGL). This variability can cause tall turbines to produce difference amounts of power during time periods with identical hub height wind speeds. Using meteorological and power generation data from a West Coast North American wind farm over a one-year period, our study synthesizes standard wind park observations, such as wind speed from turbine nacelles and sparse meteorological tower observations, with high-resolution profiles of wind speed and turbulence from a remote sensing platform, to quantify the impact of atmospheric stability on power output. We first compare approaches to defining atmospheric stability. The standard, limited, wind farm operations enable the calculation only of a wind shear exponent ({alpha}) or turbulence intensity (I{sub U}) from cup anemometers, while the presence at this wind farm of a SODAR enables the direct observation of turbulent kinetic energy (TKE) throughout the turbine rotor disk. Additionally, a nearby research meteorological station provided observations of the Obukhov length, L, a direct measure of atmospheric stability. In general, the stability parameters {alpha}, I{sub U}, and TKE are in high agreement with the more physically-robust L, with TKE exhibiting the best agreement with L. Using these metrics, data periods are segregated by stability class to investigate power performance dependencies. Power output at this wind farm is highly correlated with atmospheric stability during the spring and summer months, while atmospheric stability exerts little impact on power output during the winter and autumn periods. During the spring and summer seasons, power output for a given wind speed was significantly higher during stable conditions and significantly lower during strongly convective conditions: power output differences approached 20% between stable and convective regimes. The dependency of stability on power output was apparent only when both turbulence and the shape of the wind speed profile were considered. Turbulence is one of the mechanisms by which atmospheric stability affects a turbine's power curve at this particular site, and measurements of turbulence can yield actionable insights into wind turbine behavior.

Wharton, S; Lundquist, J K

2010-02-22T23:59:59.000Z

27

Atmospheric Stability Impacts on Power Curves of Tall Wind Turbines - An Analysis of a West Coast North American Wind Farm  

SciTech Connect

Tall wind turbines, with hub heights at 80 m or above, can extract large amounts of energy from the atmosphere because they are likely to encounter higher wind speeds, but they face challenges given the complex nature of wind flow and turbulence at these heights in the boundary layer. Depending on whether the boundary layer is stable, neutral, or convective, the mean wind speed, direction, and turbulence properties may vary greatly across the tall turbine swept area (40 to 120 m AGL). This variability can cause tall turbines to produce difference amounts of power during time periods with identical hub height wind speeds. Using meteorological and power generation data from a West Coast North American wind farm over a one-year period, our study synthesizes standard wind park observations, such as wind speed from turbine nacelles and sparse meteorological tower observations, with high-resolution profiles of wind speed and turbulence from a remote sensing platform, to quantify the impact of atmospheric stability on power output. We first compare approaches to defining atmospheric stability. The standard, limited, wind farm operations enable the calculation only of a wind shear exponent ({alpha}) or turbulence intensity (I{sub U}) from cup anemometers, while the presence at this wind farm of a SODAR enables the direct observation of turbulent kinetic energy (TKE) throughout the turbine rotor disk. Additionally, a nearby research meteorological station provided observations of the Obukhov length, L, a direct measure of atmospheric stability. In general, the stability parameters {alpha}, I{sub U}, and TKE are in high agreement with the more physically-robust L, with TKE exhibiting the best agreement with L. Using these metrics, data periods are segregated by stability class to investigate power performance dependencies. Power output at this wind farm is highly correlated with atmospheric stability during the spring and summer months, while atmospheric stability exerts little impact on power output during the winter and autumn periods. During the spring and summer seasons, power output for a given wind speed was significantly higher during stable conditions and significantly lower during strongly convective conditions: power output differences approached 20% between stable and convective regimes. The dependency of stability on power output was apparent only when both turbulence and the shape of the wind speed profile were considered. Turbulence is one of the mechanisms by which atmospheric stability affects a turbine's power curve at this particular site, and measurements of turbulence can yield actionable insights into wind turbine behavior.

Wharton, S; Lundquist, J K

2010-02-22T23:59:59.000Z

28

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

29

Lattice Tower Design of Offshore Wind Turbine Support Structures.  

E-Print Network (OSTI)

??Optimal design of support structure including foundation and turbine tower is among the most critical challenges for offshore wind turbine. With development of offshore wind… (more)

Gong, W.

2011-01-01T23:59:59.000Z

30

Hydrogen Storage in Wind Turbine Towers: Cost Analysis and Conceptual Design; Preprint  

Science Conference Proceedings (OSTI)

Low-cost hydrogen storage is recognized as a cornerstone of a renewables-hydrogen economy. Modern utility-scale wind turbine towers are typically conical steel structures that, in addition to supporting the rotor, could be used to store hydrogen. The most cost-effective hydrogen tower design would use substantially all of its volume for hydrogen storage and be designed at its crossover pressure. An 84-m tall hydrogen tower for a 1.5-MW turbine would cost an additional $84,000 (beyond the cost of the conventional tower) and would store 950 kg of hydrogen. The resulting incremental storage cost of $88/kg is approximately 30% of that for conventional pressure vessels.

Kottenstette, R.; Cotrell, J.

2003-09-01T23:59:59.000Z

31

A tall tower wind investigation of northwest Missouri .  

E-Print Network (OSTI)

??With energy needs on the rise and our current energy consumption methods polluting the atmosphere, it is the right time to look at alternative forms… (more)

Redburn, Rachel

2007-01-01T23:59:59.000Z

32

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 !

33

Comparison of Second Wind Triton Data with Meteorological Tower Measurements  

DOE Green Energy (OSTI)

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 this study, 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 high-quality tower measurement program. Second Wind Inc. (Somerville, MA, USA) provided NREL with more than six months of data from a measurement program conducted near an operating wind farm in western Texas.

Scott, G.; Elliott, D.; Schwartz, M.

2010-02-01T23:59:59.000Z

34

A Design for Unattended Monitoring of Carbon Dioxide on a Very Tall Tower  

Science Conference Proceedings (OSTI)

Unattended measurements of carbon dioxide (CO2) mixing ratio at three altitudes up to 496 m above the surface on a television transmitter tower in the southeastern United States have been made for a period of 4 yr. This report describes the ...

Cong Long Zhao; Peter S. Bakwin; Pieter P. Tans

1997-10-01T23:59:59.000Z

35

Model and Seismic Analysis of Large-scale Wind Turbine Tower Structure  

Science Conference Proceedings (OSTI)

The working condition of wind turbine tower structure with a massive engine room and revolving wind wheels is very complex. The paper simplify the wind turbine tower model with finite element analysis software --ANSYS, completed modal analysis firstly, ... Keywords: wind turbine tower, model analysis, resonance, time-history analysis, dynamic

Xiang Liu; Jiangtao Kong

2012-05-01T23:59:59.000Z

36

NREL: MIDC/National Wind Technology Center M2 Tower (39.91 N...  

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

The Measurement and Instrumentation Data Center collects Irradiance and Meterological data from the National Wind Technology Center M2 Tower....

37

Wind Shear and Resources at Elevated Heights: Indiana and Iowa Case Studies (Poster)  

DOE Green Energy (OSTI)

This poster discusses the results of an analysis of wind shear and resource characteristics data collected by tall towers in Indiana and Iowa.

Elliott, D.; Schwartz, M.; Scott, G.

2008-06-01T23:59:59.000Z

38

DRIFT ISSUES OF TALL BUILDINGS DURING THE MARCH ...  

Science Conference Proceedings (OSTI)

... Tower in NYC, 92 story Trump Tower (Chicago), 828 m tall Bhuj Tower in Dubai).Their performances are yet to be assessed and/or observed! ...

2013-02-19T23:59:59.000Z

39

Dependence of Wind Turbine Curves on Atmospheric Stability Regimes - An Analysis of a West Coast North American Tall Wind Farm  

DOE Green Energy (OSTI)

Tall wind turbines, with hub heights at 80 m or above, can extract large amounts of energy from the atmosphere because they are likely to encounter higher wind speeds, but they face challenges given the complex nature of wind flow in the boundary layer. Depending on whether the boundary layer is stable, convective or neutral, mean wind speed (U) and turbulence ({sigma}{sub U}) may vary greatly across the tall turbine swept area (40 m to 120 m). This variation can cause a single turbine to produce difference amounts of power during time periods of identical hub height wind speeds. The study examines the influence that atmospheric mixing or stability has on power output at a West Coast North American wind farm. They first examine the accuracy and applicability of two, relatively simple stability parameters, the wind shear-exponent, {alpha}, and the turbulence intensity, I{sub u}, against the physically-based, Obukhov length, L, to describe the wind speed and turbulence profiles in the rotor area. In general, the on-site stability parameters {alpha} and I{sub u} are in high agreement with the off-site, L stability scale parameter. Next, they divide the measurement period into five stability classes (strongly stable, stable, neutral, convective, and strongly convective) to discern stability-effects on power output. When only the mean wind speed profile is taken into account, the dependency of power output on boundary layer stability is only subtly apparent. When turbulence intensity I{sub u} is considered, the power generated for a given wind speed is twenty percent higher during strongly stable conditions than during strongly convective conditions as observed in the spring and summer seasons at this North American wind farm.

Wharton, S; Lundquist, J K; Sharp, J; Zulauf, M

2009-08-24T23:59:59.000Z

40

Design of Light Weight Structure for Wind Turbine Tower by Using ...  

Science Conference Proceedings (OSTI)

This paper reports a new design scheme of light weight structure for wind turbine tower. This design scheme is based on the integration of the nano-structured ...

Note: This page contains sample records for the topic "tall tower wind" 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

Towards a Wind Energy Climatology at Advanced Turbine Hub-Heights: Preprint  

DOE Green Energy (OSTI)

Measurements of wind characteristics over a wide range of heights up to and above 100 m are useful to: (1) characterize the local and regional wind climate; (2) validate wind resource estimates derived from numerical models; and (3) evaluate changes in wind characteristics and wind shear over the area swept by the blades. Developing wind climatology at advanced turbine hub heights for the United States benefits wind energy development. Tall tower data from Kansas, Indiana, and Minnesota (which have the greatest number of tall towers with measurement data) will be the focus of this paper. Analyses of data from the tall towers will start the process of developing a comprehensive climatology.

Schwartz, M.; Elliott, D.

2005-05-01T23:59:59.000Z

42

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

E-Print Network (OSTI)

Traditional buildings are cooled and ventilated by mechanically induced drafts. Natural ventilation aspires to cool and ventilate a building by natural means, such as cross ventilation or wind towers, without mechanical equipment. A simple computer program was developed to simulate airflow through a wind tower based on tower dimensions and air temperature. The program was compared to experimental results with reasonable agreement. Parametric analysis indicates that interior air temperature approaches outdoor air temperature asymptotically as tower height and cross-sectional area are increased, and that it may be more cost effective to increase the tower?s height than its cross sectional area. The program was then used to simulate hour-by-hour indoor air temperatures of an occupied auditorium in Dayton, OH. The results indicate that a large wind tower was able to keep the temperature of an occupied auditorium at a comfortable level year round.

Seryak, J.; Kissock, J. K.

2002-01-01T23:59:59.000Z

43

Wind energy conversion. Volume IX. Aerodynamics of wind turbine with tower disturbances  

DOE Green Energy (OSTI)

Lifting line theory which is the counterpart of Prandtl's lifting line theory for rotating wing is employed for the overall performance analysis of a horizontal axis wind turbine rotor operating in a uniform flow. The wake system is modeled by non-rigid wake which includes the radial expansion and the axial retardation of trailing vortices. For the non-uniform flow which are caused by the ground, the tower reflection, or the tower shadow, the unsteady airloads acting on the turbine blade are computed, using lifting line theory and a non-rigid wake model. An equation which gives the wind profile in the tower shadow region is developed. Also, the equations to determine pitch angle control are derived to minimize the flapping moment variations or the thrust variations due to the non-uniform flow over a rotation.

Chung, S.Y.

1978-09-01T23:59:59.000Z

44

Wind response of a tall building with full-scale observations  

SciTech Connect

A 22-story hotel is the subject of a full-scale experimental study conducted as the second phase of a project addressing the wind-induced response of tall buildings. The first phase of this study investigated a 16-story office building. The observations of wind loading and building response obtained at the hotel site reflect similar behavior as was observed at the office building. Consequently, the second phase serves to reinforce and generalize the findings of the phase one study. The results illustrate the significance of wind-induced response for buildings of intermediate height. Based on estimated thresholds of human perceptibility combined with predictions of maximum building response from a theoretical analysis, clearly perceptible wind-induced motion is expected to occur annually at the hotel. Yet, motion will not be sufficient intensity to be unpleasant. A similar analysis suggests that building response will also produce some non-structural damage on an annual basis. 3 refs., 5 figs., 2 tabs.

Mills, R.S. (California State Univ., Chico, CA (United States))

1991-08-01T23:59:59.000Z

45

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

Science Conference Proceedings (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

46

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

47

Estimation of Blade and Tower Properties for the Gearbox Research Collaborative Wind Turbine  

SciTech Connect

This report documents the structural and modal properties of the blade and tower of a 3-bladed 750-kW upwind turbine to develop an aeroelastic model of the wind turbine.

Bir, G.S.; Oyague, F.

2007-11-01T23:59:59.000Z

48

A Study of Wind Stress Determination Methods from a Ship and an Offshore Tower  

Science Conference Proceedings (OSTI)

Comparisons are made between surface wind stress measurements obtained by the inertial-dissipation and direct covariance methods on a stable offshore tower and by the inertial-dissipation and bulk methods on a ship. The shipboard inertial-...

Paul A. Frederickson; Kenneth L. Davidson; James B. Edson

1997-08-01T23:59:59.000Z

49

Tower Design Load Verification on a 1-kW Wind Turbine: Preprint  

DOE Green Energy (OSTI)

Wind turbine testing at the National Wind Technology Center (NWTC) has been done to characterize both tower top loads and thrust loads for small wind turbines, which is part of an ongoing effort to model and predict small wind turbine behavior and the resulting stresses imposed on the supporting tower. To these ends, a 1-kW furling wind turbine mounted on a 10-meter tower was instrumented and monitored via a data acquisition system for nearly a year. This test was conducted to verify the design loads as predicted by the simple design equations provided in the draft revision of the International Electrotechnical Commission (IEC) Small Wind Turbine Safety Standard 61400-02 CDV (hereafter called ''the draft Standard''). Data were captured for several operating conditions covered by the draft Standard. This paper addresses the collected data and what conclusions can be made from it.

Prascher, D.; Huskey, A.

2004-11-01T23:59:59.000Z

50

Determination of the Mean Wind Speed and Momentum Diffusivity Profiles above Tall Vegetation and Forest Canopies Using a Mass Conservation Assumption  

Science Conference Proceedings (OSTI)

A semianalytical method based on a mass conservation principle is presented for describing the transition- layer profiles of mean wind speed and momentum diffusivity and for estimating the aerodynamic characteristics of forest and tall vegetation ...

N. M. Zoumakis

1994-02-01T23:59:59.000Z

51

Hydrogen Storage in Wind Turbine Towers: Design Considerations; Preprint  

DOE Green Energy (OSTI)

The paramount considerations associated with a hydrogen tower are corrosion (in the form of hydrogen embrittlement) and structural failure (through bursting or fatigue life degradation). Although hydrogen embrittlement (HE) requires more research and experimentation, it does not appear to prohibit the use of turbine towers for hydrogen storage. Furthermore, the structural modifications required to store hydrogen in a tower are technically feasible. We discovered that hydrogen towers have a''crossover pressure'' at which their critical mode of failure crosses over from fatigue to bursting. The crossover pressure for many turbine towers is between 10 and 15 atm. The cost of hydrogen storage per unit of storage capacity is lowest near the crossover pressure. Above the crossover pressure, however, storage costs rise quickly.

Kottenstette, R.; Cotrell, J.

2003-09-01T23:59:59.000Z

52

Sea-Tower Measurements of Wind-Wave Spectra in the Caspian Sea  

Science Conference Proceedings (OSTI)

High frequency spectra of wind generated waves corresponding to mean wind speeds from 3.5 to 13.5 m s?1 were measured at the research tower in the Caspian Sea. The techniques used made it possible to evaluate spectra S(?) in the frequency range ...

I. A. Leykin; A. D. Rozenberg

1984-01-01T23:59:59.000Z

53

The Vibration Frequencies of Wind Turbine Steel Tower by Transfer Matrix Method  

Science Conference Proceedings (OSTI)

Large-scale wind turbine structure is simplified as a slender cantilever beam with variable sections subject to complex loads configuration. An analytical procedure to estimate not only natural frequencies but also vibration mode shapes of thin-walled ... Keywords: horizontal axis wind turbine tower, natural frequency, transfer matrix method, free vibration

Wang Meng; Wang Zhangqi

2011-01-01T23:59:59.000Z

54

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

DOE Green Energy (OSTI)

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

55

Wind Tunnel Experiment for Predicting a Visible Plume Region from a Nuclear Power Plant Cooling Tower  

Science Conference Proceedings (OSTI)

The current paper introduces a wind tunnel experiment to study the effect of the cooling tower of a Nuclear Power Plant (NPP) on the flow and the characteristics of visible plume regions. The relevant characteristics of the flow field near the ...

Guo Dong-peng; Yao Ren-tai; Fan Dan

56

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.

57

Numerical simulation of tower rotor interaction for downwind wind turbine  

Science Conference Proceedings (OSTI)

Downwind wind turbines have lower upwind rotormisalignment, and thus lower turning moment and self-steered advantage over the upwind configuration. In this paper, numerical simulation to the downwind turbine is conducted to investigate the interaction ...

Isam Janajreh; Ilham Talab; Jill Macpherson

2010-01-01T23:59:59.000Z

58

An experimental and numerical study of wind turbine seismic behavior  

E-Print Network (OSTI)

turbine with an 18 m tall tower and 13 m rotor diameter. Inwith a 38 meter tall steel tower designed for installationturbine with a 44 m tall steel tower and 52 m rotor diameter

Prowell, I.

2011-01-01T23:59:59.000Z

59

Prediction of Wind Speed, Direction and Diffusivity under Neutral Conditions for Tall Stacks  

Science Conference Proceedings (OSTI)

A one dimensional model of the neutral planetary boundary layer is used to predict the wind velocity and coefficient of eddy diffusivity throughout the 2-km planetary boundary layer. Comparison with routine radiosonde observations show that at ...

Nirupama Raghavan; Swati Basu

1988-03-01T23:59:59.000Z

60

Analyzing the Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity at Different Sites in California and the Northwest  

E-Print Network (OSTI)

or production data from tall towers are needed before we canhub-height data from tall-tower anemometers or operatingor production data from tall towers are needed before we can

Fripp, Matthias; Wiser, Ryan

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tall tower wind" 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

WindPACT Rotor Design Study: Hybrid Tower Design; Period of Performance: 29 June 2000 -- 28 February 2004  

DOE Green Energy (OSTI)

The cost of a wind turbine tower can represent as much as 20% of the cost of an entire megawatt-scale horizontal axis wind turbine (HAWT) and as much as 10% of the total cost of energy. The tower is a major cost component, and its design is important: Its structural properties are key to the response of the rotor; its height determines the wind regime that the rotor experiences; it allows access to the turbine nacelle and rotor; and it houses components of the electrical connection and the control and protection systems. Most large wind turbines installed in the United States use self-supporting steel tubular towers. The diameter of these tubes is limited by the size that can be transported by road (approximately 4.3 m). The base dimensions of a truss tower are not restrained by this limit, but trusses may require more maintenance. Guyed tube towers have been used, but they represent additional foundation costs and inconvenience. Addressing these limitations may lead to an alternative that avoids the problems. For this reason, the WindPACT Rotor Design Study was modified to include a study of a hybrid tower to determine the technical and economic feasibility of such a design.

Malcolm, D. J.

2004-04-01T23:59:59.000Z

62

Evaluation of Three-Beam and Four-Beam Profiler Wind Measurement Techniques Using a Five-Beam Wind Profiler and Collocated Meteorological Tower  

Science Conference Proceedings (OSTI)

In this paper a five-beam wind profiler and a collocated meteorological tower are used to estimate the accuracy of four-beam and three-beam wind profiler techniques in measuring horizontal components of the wind. In the traditional three-beam ...

Ahoro Adachi; Takahisa Kobayashi; Kenneth S. Gage; David A. Carter; Leslie M. Hartten; Wallace L. Clark; Masato Fukuda

2005-08-01T23:59:59.000Z

63

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

DOE Green Energy (OSTI)

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

64

Low Wind Speed Technology Phase II: Design and Demonstration of On-Site Fabrication of Fluted-Steel Towers Using LITS-Form(TM) Process  

DOE Green Energy (OSTI)

This fact sheet describes NREL's subcontract with Native American Technologies to develop a new method of metal plate forming to produce wind turbine towers.

Not Available

2006-06-01T23:59:59.000Z

65

Power Tower Systems for Concentrating Solar Power  

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

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...

66

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.

67

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.

68

Dynamic analysis of guyed towers subjected to wind loads incorporating nonlinearity of the guys.  

E-Print Network (OSTI)

??Guyed masts are unique civil engineering structures, structurally efficient, selfsupporting lattice towers. High structural efficiency of guyed towers is achieved by the use of pre-tensioned… (more)

Kaul, Rohit

1999-01-01T23:59:59.000Z

69

Tall Genetics  

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

Tall Genetics Tall Genetics Name: kate Location: N/A Country: N/A Date: N/A Question: how do i grow tall? please tell me some advice or exercise. Replies: I'm sorry but there is no exercise for making you taller. You are genetically programmed to be a certain height. That was determined before you were born. There are a few factors that make you NOT reach your genetically programmed height, such as diet and the way your mother took care of herself when she was pregnant. For instance, if you were supposed to be 5'6" and you didn't get the right diet when you were growing ( which you probably still are!) or your mother drank, smoked and had a bad diet while she was pregnant with you, you may not reach 5'6". You might be shorter. But there isn't anything you can do to make yourself TALLER than you were supposed to be. Take heart-you are only 14 and you will probably still grow a little bit. Have you started you period yet? I ask this because girls usually stop growing about a year after their period begins.

70

Tower Temperature and Humidity Sensors (TWR) Handbook  

Science Conference Proceedings (OSTI)

Three tall towers are installed at the Atmospheric Radiation Measurement (ARM) Climate Research Facility: a 60-meter triangular tower at the Southern Great Plains (SGP) Central Facility (CF), a 21-meter walkup scaffolding tower at the SGP Okmulgee forest site (E21), and a 40-meter triangular tower at the North Slope of Alaska (NSA) Barrow site. The towers are used for meteorological, radiological, and other measurements.

Cook, DR

2010-02-01T23:59:59.000Z

71

Description of the Columbia Basin Wind Energy Study (CBWES)  

SciTech Connect

The purpose of this Technical Report is to provide background information about the Columbia Basin Wind Energy Study (CBWES). This study, which was supported by the U.S. Department of Energy’s Wind and Water Power Program, was conducted from 16 November 2010 through 21 March 2012 at a field site in northeastern Oregon. The primary goal of the study was to provide profiles of wind speed and wind direction over the depth of the boundary layer in an operating wind farm located in an area of complex terrain. Measurements from propeller and vane anemometers mounted on a 62 m tall tower, Doppler Sodar, and Radar Wind Profiler were combined into a single data product to provide the best estimate of the winds above the site during the first part of CBWES. An additional goal of the study was to provide measurements of Turbulence Kinetic Energy (TKE) near the surface. To address this specific goal, sonic anemometers were mounted at two heights on the 62 m tower on 23 April 2011. Prior to the deployment of the sonic anemometers on the tall tower, a single sonic anemometer was deployed on a short tower 3.1 m tall that was located just to the south of the radar wind profiler. Data from the radar wind profiler, as well as the wind profile data product are available from the Atmospheric Radiation Measurements (ARM) Data Archive (http://www.arm.gov/data/campaigns). Data from the sonic anemometers are available from the authors.

Berg, Larry K.; Pekour, Mikhail S.; Nelson, Danny A.

2012-10-01T23:59:59.000Z

72

Out of Ashes and Rubble: The Pirelli Tower  

E-Print Network (OSTI)

tower was novel, experimental architecture because it was the first skyscraper to be built in Italy; it was an extremely tall

Ziegler, Claudia J.

2009-01-01T23:59:59.000Z

73

WindPACT Turbine Design Scaling Studies Technical Area 3ÂŒSelf-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

74

Raw Data from National Wind Technology Center M2 Tower (2001...  

Open Energy Info (EERE)

2001 - 2011) This raw data reflects readings from instruments mounted on or near a 82 meter meteorological tower located at the

75

Raw Data from National Wind Technology Center M2 Tower (1996...  

Open Energy Info (EERE)

1996 - 2001) This raw data reflects readings from instruments mounted on or near a 82 meter meteorological tower located at the 

76

Wind Turbine Basics | Department of Energy  

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

Wind Turbine Basics Wind Turbine Basics Wind Turbine Basics July 30, 2013 - 2:58pm Addthis Energy 101: Wind Turbines Basics This video explains the basics of how wind turbines operate to produce clean power from an abundant, renewable resource-the wind. Text Version Wind turbine assembly Although all wind turbines operate on similar principles, several varieties are in use today. These include horizontal axis turbines and vertical axis turbines. Horizontal Axis Turbines Horizontal axis turbines are the most common turbine configuration used today. They consist of a tall tower, atop which sits a fan-like rotor that faces into or away from the wind, a generator, a controller, and other components. Most horizontal axis turbines built today are two- or three-bladed. Horizontal axis turbines sit high atop towers to take advantage of the

77

A Study on the Effect of Nudging on Long-Term Boundary Layer Profiles of Wind and Weibull Distribution Parameters in a Rural Coastal Area  

Science Conference Proceedings (OSTI)

By use of 1 yr of measurements performed with a wind lidar up to 600-m height, in combination with a tall meteorological tower, the impact of nudging on the simulated wind profile at a flat coastal site (Høvsøre) in western Denmark using the ...

S.-E. Gryning; E. Batchvarova; R. Floors

2013-05-01T23:59:59.000Z

78

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

E-Print Network (OSTI)

a profoundly irregular primary source, the wind. The characteristics of the wind energy source are important in different aspects regarding wind energy exploitation. The energy available in the wind varies with the cube, by a continuous essay to significantly improve all aspects of a wind energy conversion system. Many research works

79

NREL: Wind Research - Gaia-Wind's 11 Kilowatt Wind Turbine Testing and  

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

Gaia-Wind's 11 Kilowatt Wind Turbine Testing and Results Gaia-Wind's 11 Kilowatt Wind Turbine Testing and Results A video of Gaia-Wind's 11-kW 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 Gaia-Wind's 11-kilowatt (kW) small wind turbine at the National Wind Technology Center (NWTC). Gaia-Wind's turbine is a three-phase induction generator that operates at 480 volts. The turbine's downwind rotor has a 13-meter diameter, and its tower is 18 meters tall. The two-bladed, oversized rotor is designed for low to moderate wind speeds. Testing Summary The summary of the tests is below with the final reports. Cumulative Energy Production 6/11/2008: 210; 6/13/2008: 528; 6/16/2008: 716; 6/18/2008: 731; 6/19/2008:

80

Characteristics Study of Transmission Line Mechanical Research Center (TLMRC) Wind Tower Data: Notes on Field-Wind Loading Experiments  

Science Conference Proceedings (OSTI)

Field determination of wind loads is one of the critical areas of wind research. In the past, researchers have used different procedures to collect, reduce, and analyze wind data, making it difficult to compare results. This study focused on data acquisition and reduction techniques for field-wind experiments and their derived results. The outcome will be useful for developing a standard procedure for future field-wind loading experiments.

1992-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "tall tower wind" 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

Enhancement of CN Tower lightning current derivative signals using a modified power spectral subtraction method.  

E-Print Network (OSTI)

??Lightning current measurements are possible using instrumental tall structures or rocket-triggered lightning. The CN Tower has been a source of lightning current data for the… (more)

Mehmud, Huma

2006-01-01T23:59:59.000Z

82

Flux Measurements of Volatile Organic Compounds from an Urban Tower Platform.  

E-Print Network (OSTI)

??A tall tower flux measurement setup was established in metropolitan Houston, Texas, to measure trace gas fluxes from both anthropogenic and biogenic emission sources in… (more)

Park, Chang Hyoun

2011-01-01T23:59:59.000Z

83

Wind Turbine Basics | Department of Energy  

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

Turbine Basics Turbine Basics Wind Turbine Basics July 30, 2013 - 2:58pm Addthis Energy 101: Wind Turbines Basics This video explains the basics of how wind turbines operate to produce clean power from an abundant, renewable resource-the wind. Text Version Wind turbine assembly Although all wind turbines operate on similar principles, several varieties are in use today. These include horizontal axis turbines and vertical axis turbines. Horizontal Axis Turbines Horizontal axis turbines are the most common turbine configuration used today. They consist of a tall tower, atop which sits a fan-like rotor that faces into or away from the wind, a generator, a controller, and other components. Most horizontal axis turbines built today are two- or three-bladed. Horizontal axis turbines sit high atop towers to take advantage of the

84

Sun, wind, and pedestrian comfort: a study of Toronto's Central Area  

E-Print Network (OSTI)

the north, with a tall, 46m-high tower along Shuter Street.tall enough, cast shadows on streets that are located to the north of such a tower,

Bosselmann, P.; Arens, Edward A; Dunker, K.; Wright, R.

1990-01-01T23:59:59.000Z

85

Cooling Towers, The Debottleneckers  

E-Print Network (OSTI)

Power generating plants and petro-chemical works are always expanding. An on-going problem is to identify and de-bottle neck restricting conditions of growth. The cooling tower is a highly visible piece of equipment. Most industrial crossflow units are large structures, Illustration 1. Big budget money and engineering time goes into gleaming stainless steel equipment and exotic process apparatus, the poor cooling tower is the ignored orphan of the system. Knowledgeable Engineers, however, are now looking into the function of the cooling tower, which is to produce colder water- and question the quality of water discharged from that simple appearing box. These cross-flow structures are quite large, ranging up to 60 feet tall with as many as 6 or more cells in a row. With cells up to 42 feet long so immense in aspect, with fans rotating, operators assume, just by appearances, that all is well, and usually pay no attention to the quality of cold water returning from the cooling tower. The boxes look sturdy, but the function of the cooling tower is repeated ignored production of water as cold as possible.

Burger, R.

1998-04-01T23:59:59.000Z

86

Design and experimental validation of 328 ft (100 m) tall wind turbine towers utilizing high strength and ultra-high performance concrete.  

E-Print Network (OSTI)

??With today's global capacity exceeding 280 GW, windpower has proven to be a formidable source of renewable energy worldwide. In order to keep pace with… (more)

Schmitz, Grant M.

2013-01-01T23:59:59.000Z

87

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":""}]}

88

Power Tower Systems for Concentrating Solar Power | Department...  

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

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...

89

Electromagnetic field radiation model for lightning strokes to tall structures  

SciTech Connect

This paper describes observation and analysis of electromagnetic field radiation from lightning strokes to tall structures. Electromagnetic field waveforms and current waveforms of lightning strokes to the CN Tower have been simultaneously measured since 1991. A new calculation model of electromagnetic field radiation is proposed. The proposed model consists of the lightning current propagation and distribution model and the electromagnetic field radiation model. Electromagnetic fields calculated by the proposed model, based on the observed lightning current at the CN Tower, agree well with the observed fields at 2km north of the tower.

Motoyama, H. [CRIEPI, Tokyo (Japan); Janischewskyj, W.; Hussein, A.M. [Univ. of Toronto, Ontario (Canada); Chisholm, W.A. [Ontario Hydro Technologies, Toronto, Ontario (Canada); Chang, J.S. [McMaster Univ., Hamilton, Ontario (Canada); Rusan, R.

1996-07-01T23:59:59.000Z

90

Wind shear climatology for large wind turbine generators  

DOE Green Energy (OSTI)

Climatological wind shear analyses relevant to the design and operation of multimegawatt wind turbines are provided. Insight is provided for relating the wind experienced by a rotating blade in a shear flow to the analysis results. A simple analysis of the wind experienced by a rotating blade for three types of wind shear profiles under steady-state conditions is presented in graphical form. Comparisons of the magnitude and frequency of the variations in 1) the wind sensed by a single blade element, 2) the sum, and 3) the difference of the winds sensed by opposite blade elements show strong sensitivity to profile shape. These three items represent forcing functions that can be related to 1) flatwise bending moment, 2) torque on the shaft, and 3) teeter angle. A computer model was constructed to simulate rotational sampling of 10-s sampled winds from a tall tower for three different types of large wind turbines. Time series produced by the model indicated that the forcing functions on a rotating blade vary according to the shear profile encountered during each revolution as opposed to a profile derived from average wind conditions, e.g., hourly average winds. An analysis scheme was developed to establish a climatology of wind shear profiles derived from 10-s sampled winds and hourly average winds measured over a one-year period at several levels on a tall tower. Because of the sensitivity of the forcing function variability to profile shape, the analyses performed and presented are in the form of joint frequency distributions of velocity differences of the the top-to-hub versus the hub-to-bottom portion of disks of rotation for the three turbine configurations.

Elliott, D.L.; Wendell, L.L.; Heflick, S.K.

1982-10-01T23:59:59.000Z

91

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

92

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

93

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

94

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

95

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

96

Modification of the Colony Tower for the RIO BLANCO detonation  

SciTech Connect

The tower is a 180-ft tall steel-frame experimental oil shale processing retort structure with heavy process equipment on various levels. The structural response of the tower to the ground motion from Project Rio Blanco is analyzed and the necessary structural modifications described. (TFD)

Blume, J.A.; Lee, L.A.; Freeman, S.A.; Honda, K.K.

1974-04-30T23:59:59.000Z

97

Upcoming Funding Opportunity for Tower Manufacturing and ...  

... and Lower Cost of Energy" intends to support partnerships leading to innovative designs and processes for wind turbine tower manufacturing and ...

98

Regulation of Tall Structures (Indiana) | Department of Energy  

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

Regulation of Tall Structures (Indiana) Regulation of Tall Structures (Indiana) Regulation of Tall Structures (Indiana) < Back Eligibility Agricultural Commercial Construction Fed. Government Fuel Distributor General Public/Consumer Industrial Installer/Contractor Institutional Investor-Owned Utility Local Government Low-Income Residential Multi-Family Residential Municipal/Public Utility Nonprofit Residential Retail Supplier Rural Electric Cooperative Schools State/Provincial Govt Systems Integrator Transportation Tribal Government Utility Savings Category Wind Buying & Making Electricity Program Info State Indiana Program Type Siting and Permitting Provider Indiana Department of Transporation A permit from the Department of Transportation is required for the construction or alteration of any structure higher than 200 feet above

99

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

100

New Facility to Shed Light on Offshore Wind Resource (Fact Sheet), Highlights in Research & Development, NREL (National Renewable Energy Laboratory)  

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

As a pre-existing structure in a location with As a pre-existing structure in a location with excellent offshore wind resources, the Chesapeake Light Tower provides a cost-effective alternative to building a new platform large enough to support an 80- to 100-meter-tall meteorological tower. Photo by Rick Driscoll, NREL 25660 Chesapeake Light Tower facility will gather key data for unlocking the nation's vast offshore wind resource. According to the National Offshore Wind Strategy published by the U.S. Department of Energy (DOE) in 2011, the nation's offshore wind resource could supply 54 gigawatts of generat- ing capacity by 2030. However, to tap into that potential, more data on the nature of offshore wind resources and the ocean environment is needed. An opportunity to address this need was cre-

Note: This page contains sample records for the topic "tall tower wind" 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

Review of Wind Energy Forecasting Methods for Modeling Ramping Events  

DOE Green Energy (OSTI)

Tall onshore wind turbines, with hub heights between 80 m and 100 m, can extract large amounts of energy from the atmosphere since they generally encounter higher wind speeds, but they face challenges given the complexity of boundary layer flows. This complexity of the lowest layers of the atmosphere, where wind turbines reside, has made conventional modeling efforts less than ideal. To meet the nation's goal of increasing wind power into the U.S. electrical grid, the accuracy of wind power forecasts must be improved. In this report, the Lawrence Livermore National Laboratory, in collaboration with the University of Colorado at Boulder, University of California at Berkeley, and Colorado School of Mines, evaluates innovative approaches to forecasting sudden changes in wind speed or 'ramping events' at an onshore, multimegawatt wind farm. The forecast simulations are compared to observations of wind speed and direction from tall meteorological towers and a remote-sensing Sound Detection and Ranging (SODAR) instrument. Ramping events, i.e., sudden increases or decreases in wind speed and hence, power generated by a turbine, are especially problematic for wind farm operators. Sudden changes in wind speed or direction can lead to large power generation differences across a wind farm and are very difficult to predict with current forecasting tools. Here, we quantify the ability of three models, mesoscale WRF, WRF-LES, and PF.WRF, which vary in sophistication and required user expertise, to predict three ramping events at a North American wind farm.

Wharton, S; Lundquist, J K; Marjanovic, N; Williams, J L; Rhodes, M; Chow, T K; Maxwell, R

2011-03-28T23:59:59.000Z

102

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

103

Wind power systems in the stable nocturnal boundary layer.  

E-Print Network (OSTI)

??Hourly-averaged tall-tower data from a 200m tower located near Lubbock, Texas are used to examine static atmospheric stability as a governor of speed and direction… (more)

Walter, Kevin Robert

2007-01-01T23:59:59.000Z

104

Cuyahoga County Fairgrounds Wind Turbine Project Turbine Visualization...  

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

Conserve First LLC Attachment 1, Appendix C Page 20 of 28 Other Local Towers (Also See Tall Tower Tables Below) Appendix B Attachment B1 Copyright 2010: Conserve First LLC...

105

towers of Hanoi  

Science Conference Proceedings (OSTI)

NIST. towers of Hanoi. (classic problem). Definition: Given three posts (towers) and n disks of decreasing sizes, move the ...

2013-08-23T23:59:59.000Z

106

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

107

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.

108

Top 10 Things You Didn't Know About Wind | Department of Energy  

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

Top 10 Things You Didn't Know About Wind Top 10 Things You Didn't Know About Wind Top 10 Things You Didn't Know About Wind August 14, 2012 - 9:38am Addthis Photo courtesy of Nordex USA. Photo courtesy of Nordex USA. Liz Hartman Communications Team Lead, Wind and Water Power This article is part of the Energy.gov series highlighting the "Top Things You Didn't Know About..." series. Be sure to check back for more entries soon. 10. Human civilizations have harnessed wind power for thousands of years. Early forms of windmills used wind to crush grain or pump water. Now, modern wind turbines use the wind to create electricity. Learn how here. 9. A wind turbine has as many as 8,000 different components. 8. Wind turbines are big. A wind turbine blade can be up to 150 feet long, and a turbine tower can be over 250 feet tall, almost as tall as the Statue

109

Top 10 Things You Didn't Know About Wind | Department of Energy  

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

Top 10 Things You Didn't Know About Wind Top 10 Things You Didn't Know About Wind Top 10 Things You Didn't Know About Wind August 14, 2012 - 9:38am Addthis Photo courtesy of Nordex USA. Photo courtesy of Nordex USA. Liz Hartman Communications Team Lead, Wind and Water Power This article is part of the Energy.gov series highlighting the "Top Things You Didn't Know About..." series. Be sure to check back for more entries soon. 10. Human civilizations have harnessed wind power for thousands of years. Early forms of windmills used wind to crush grain or pump water. Now, modern wind turbines use the wind to create electricity. Learn how here. 9. A wind turbine has as many as 8,000 different components. 8. Wind turbines are big. A wind turbine blade can be up to 150 feet long, and a turbine tower can be over 250 feet tall, almost as tall as the Statue

110

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":""}]}

111

Surface and Tower Meteorological Instrumentation at NSA Handbook - January 2006  

SciTech Connect

The Surface and Tower Meteorological Instrumentation at Atqasuk (METTWR2H) 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 is located at 1 m for comparison purposes. Temperature and relative humidity probes are mounted at 2 m and 5 m on the tower. For more information, see the Surface and Tower Meteorological Instrumentation at Atqasuk Handbook.

MT Ritsche

2006-01-30T23:59:59.000Z

112

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"

113

Turbine Inflow Characterization at the National Wind Technology Center  

Science Conference Proceedings (OSTI)

Utility-scale wind turbines operate in dynamic flows that can vary significantly over timescales from less than a second to several years. To better understand the inflow to utility-scale turbines, two inflow towers were installed and commissioned at the National Renewable Energy Laboratory's (NREL) National Wind Technology Center near Boulder, Colorado, in 2011. These towers are 135 m tall and instrumented with a combination of sonic anemometers, cup anemometers, wind vanes, and temperature measurements to characterize the inflow wind speed and direction, turbulence, stability and thermal stratification to two utility-scale turbines. Herein, we present variations in mean and turbulent wind parameters with height, atmospheric stability, and as a function of wind direction that could be important for turbine operation as well as persistence of turbine wakes. Wind speed, turbulence intensity, and dissipation are all factors that affect turbine performance. Our results show that these all vary with height across the rotor disk, demonstrating the importance of measuring atmospheric conditions that influence wind turbine performance at multiple heights in the rotor disk, rather than relying on extrapolation from lower levels.

Clifton, A.; Schreck, S.; Scott, G.; Kelley, N.; Lundquist, J. K.

2012-01-01T23:59:59.000Z

114

Turbine Inflow Characterization at the National Wind Technology Center: Preprint  

DOE Green Energy (OSTI)

Utility-scale wind turbines operate in dynamic flows that can vary significantly over timescales from less than a second to several years. To better understand the inflow to utility-scale turbines, two inflow towers were installed and commissioned at the National Renewable Energy Laboratory's (NREL) National Wind Technology Center near Boulder, Colorado, in 2011. These towers are 135 m tall and instrumented with a combination of sonic anemometers, cup anemometers, wind vanes, and temperature measurements to characterize the inflow wind speed and direction, turbulence, stability and thermal stratification to two utility-scale turbines. Herein, we present variations in mean and turbulent wind parameters with height, atmospheric stability, and as a function of wind direction that could be important for turbine operation as well as persistence of turbine wakes. Wind speed, turbulence intensity, and dissipation are all factors that affect turbine performance. Our results shown that these all vary with height across the rotor disk, demonstrating the importance of measuring atmospheric conditions that influence wind turbine performance at multiple heights in the rotor disk, rather than relying on extrapolation from lower levels.

Clifton, A.; Schreck, S.; Scott, G.; Kelley, N.; Lundquist, J.

2012-01-01T23:59:59.000Z

115

Tall Corn Ethanol LLC | Open Energy Information  

Open Energy Info (EERE)

Tall Corn Ethanol LLC Tall Corn Ethanol LLC Jump to: navigation, search Name Tall Corn Ethanol LLC Place Coon Rapids, Iowa Zip 50058 Product Farmer owned bioethanol production company which owns a 40m gallon (151.4m litre) bioethanol plant in Coon Rapids, Iowa. References Tall Corn Ethanol LLC[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Tall Corn Ethanol LLC is a company located in Coon Rapids, Iowa . References ↑ "Tall Corn Ethanol LLC" Retrieved from "http://en.openei.org/w/index.php?title=Tall_Corn_Ethanol_LLC&oldid=352015" Categories: Clean Energy Organizations Companies Organizations Stubs What links here Related changes Special pages Printable version Permanent link

116

The use of real-time off-site observations as a methodology for increasing forecast skill in prediction of large wind power ramps one or more hours ahead of their impact on a wind plant.  

SciTech Connect

ABSTRACT Application of Real-Time Offsite Measurements in Improved Short-Term Wind Ramp Prediction Skill Improved forecasting performance immediately preceding wind ramp events is of preeminent concern to most wind energy companies, system operators, and balancing authorities. The value of near real-time hub height-level wind data and more general meteorological measurements to short-term wind power forecasting is well understood. For some sites, access to onsite measured wind data - even historical - can reduce forecast error in the short-range to medium-range horizons by as much as 50%. Unfortunately, valuable free-stream wind measurements at tall tower are not typically available at most wind plants, thereby forcing wind forecasters to rely upon wind measurements below hub height and/or turbine nacelle anemometry. Free-stream measurements can be appropriately scaled to hub-height levels, using existing empirically-derived relationships that account for surface roughness and turbulence. But there is large uncertainty in these relationships for a given time of day and state of the boundary layer. Alternatively, forecasts can rely entirely on turbine anemometry measurements, though such measurements are themselves subject to wake effects that are not stationary. The void in free-stream hub-height level measurements of wind can be filled by remote sensing (e.g., sodar, lidar, and radar). However, the expense of such equipment may not be sustainable. There is a growing market for traditional anemometry on tall tower networks, maintained by third parties to the forecasting process (i.e., independent of forecasters and the forecast users). This study examines the value of offsite tall-tower data from the WINDataNOW Technology network for short-horizon wind power predictions at a wind farm in northern Montana. The presentation shall describe successful physical and statistical techniques for its application and the practicality of its application in an operational setting. It shall be demonstrated that when used properly, the real-time offsite measurements materially improve wind ramp capture and prediction statistics, when compared to traditional wind forecasting techniques and to a simple persistence model.

Martin Wilde, Principal Investigator

2012-12-31T23:59:59.000Z

117

OCCUPATIONAL COOLING TOWERS  

E-Print Network (OSTI)

HEALTH SCIENCES LIBRARY COOLING TOWERS EMPLOYEE HEALTH B C D F E CHILDREN'S ELEVATORS MEDICAL SCHOOL

Crews, Stephen

118

On Why Disks Generate Magnetic Towers and Collimate Jets  

E-Print Network (OSTI)

We show that accretion disks with magnetic fields in them ought to make jets provided that their electrical conductivity prevents slippage and there is an ambient pressure in their surroundings. We study equilibria of highly wound magnetic structures. General Energy theorems demonstrate that they form tall magnetic towers whose height grows with every turn at a velocity related to the circular velocity in the accretion disk. The pinch effect amplifies the magnetic pressures toward the axis of the towers whose stability is briefly considered.

D Lynden-Bell

2002-08-21T23:59:59.000Z

119

On Why Disks Generate Magnetic Towers and Collimate Jets  

E-Print Network (OSTI)

We show that accretion disks with magnetic fields in them ought to make jets provided that their electrical conductivity prevents slippage and there is an ambient pressure in their surroundings. We study equilibria of highly wound magnetic structures. General Energy theorems demonstrate that they form tall magnetic towers whose height grows with every turn at a velocity related to the circular velocity in the accretion disk. The pinch effect amplifies the magnetic pressures toward the axis of the towers whose stability is briefly considered.

Lynden-Bell, Donald

2002-01-01T23:59:59.000Z

120

Test of a Phased Array Sodar by Intercomparison with Tower Data  

Science Conference Proceedings (OSTI)

The phased array sodar PA2 recently manufactured by the French REMTECH enterprise was tested using tower data for comparison. Wind speed, wind direction, and the standard deviation of the horizontal wind direction (??) were measured continuously ...

S. Vogt; P. Thomas

1994-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "tall tower wind" 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

Updated Eastern Interconnect Wind Power Output and Forecasts for ERGIS: July 2012  

DOE Green Energy (OSTI)

AWS Truepower, LLC (AWST) was retained by the National Renewable Energy Laboratory (NREL) to update wind resource, plant output, and wind power forecasts originally produced by the Eastern Wind Integration and Transmission Study (EWITS). The new data set was to incorporate AWST's updated 200-m wind speed map, additional tall towers that were not included in the original study, and new turbine power curves. Additionally, a primary objective of this new study was to employ new data synthesis techniques developed for the PJM Renewable Integration Study (PRIS) to eliminate diurnal discontinuities resulting from the assimilation of observations into mesoscale model runs. The updated data set covers the same geographic area, 10-minute time resolution, and 2004?2006 study period for the same onshore and offshore (Great Lakes and Atlantic coast) sites as the original EWITS data set.

Pennock, K.

2012-10-01T23:59:59.000Z

122

Updated Eastern Interconnect Wind Power Output and Forecasts for ERGIS: July 2012  

SciTech Connect

AWS Truepower, LLC (AWST) was retained by the National Renewable Energy Laboratory (NREL) to update wind resource, plant output, and wind power forecasts originally produced by the Eastern Wind Integration and Transmission Study (EWITS). The new data set was to incorporate AWST's updated 200-m wind speed map, additional tall towers that were not included in the original study, and new turbine power curves. Additionally, a primary objective of this new study was to employ new data synthesis techniques developed for the PJM Renewable Integration Study (PRIS) to eliminate diurnal discontinuities resulting from the assimilation of observations into mesoscale model runs. The updated data set covers the same geographic area, 10-minute time resolution, and 2004?2006 study period for the same onshore and offshore (Great Lakes and Atlantic coast) sites as the original EWITS data set.

Pennock, K.

2012-10-01T23:59:59.000Z

123

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 passages to provide power as a by-product.

McAllister, Jr., John E. (Aiken, SC)

1985-01-01T23:59:59.000Z

124

New Facility to Shed Light on Offshore Wind Resource (Fact Sheet)  

DOE Green Energy (OSTI)

Chesapeake Light Tower facility will gather key data for unlocking the nation's vast offshore wind resource.

Not Available

2013-05-01T23:59:59.000Z

125

Meteorological Tower Measurements of a Surface Cold Front  

Science Conference Proceedings (OSTI)

measurements from the Boulder Atmospheric Observatory meteorological research tower are used to describe the structure and physical processes of a strong surface cold front. Analysis reveals that the horizontal gradients in temperature and wind ...

M. A. Shapiro

1984-08-01T23:59:59.000Z

126

WREF 2012: THE PAST AND FUTURE COST OF WIND ENERGY  

E-Print Network (OSTI)

Understanding Trends in Wind Turbine Prices Over the Pastin LCOE for Wind Turbines in Denmark. Presentation to IEAHybrid Steel/Concrete Wind Turbine Towers; June 28, 2002 –

Wiser, Ryan

2013-01-01T23:59:59.000Z

127

Jilin Tianhe Wind Power Equipment Co Ltd | Open Energy Information  

Open Energy Info (EERE)

Baicheng, Jilin Province, China Sector Wind energy Product Baicheng-based wind turbine tower producer. References Jilin Tianhe Wind Power Equipment Co Ltd1 LinkedIn Connections...

128

Energy Efficiency Evaluation of Guangzhou West Tower Façade System  

E-Print Network (OSTI)

Guangzhou West Tower is an extremely tall public building. The energy efficiency evaluation of its façade should be different than that of ordinary public buildings. Based on the national code GB50189-2005, “Design Standard for Energy efficiency of Public Buildings”, typical meteorological yearly data for Guangzhou were used and revised according to architectural character of Guangzhou West Tower. The energy efficiency design of a single skin façade and active airflow curtain wall was analyzed by a dynamic energy simulation tool and modified weather data. The payback period of initial investment in the façade system was evaluated based on simulation results. In addition, the results confirm the façade system scheme of Guangzhou West Tower.

Meng, Q.; Zhang, L.

2006-01-01T23:59:59.000Z

129

Fish and Wildlife Response Letter for Clipper Windpower Project...  

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

includes one 262-foot tall wind turbine and associatedfacilities including a 240-foot tall meteorological tower (lattice- guyed type), 400 square foot building, and underground...

130

Clipper Windpower Draft Environmental Assessment DOE/EA 1516...  

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

includes one 262-foot tall wind turbine and associatedfacilities such as a 240-foot tall meteorological tower, 400 square foot building, and underground electric lines. You...

131

Cooling-tower rebuild, treatment overhaul halt fouling  

SciTech Connect

Partial fixes over a period of time were insufficient to meet cooling requirements at this four-tower powerplant. The eventual remedy involved complete fill replacement and chemistry-program revision. Cooling-tower performance hinges on many factors. Assuming the proper water and air distribution and unhindered operation of spray nozzles, pumps, valves, etc, fill design is the key element. However, a decade of experience at Keystone station (operated by Pennsylvania Electric Co for a consortium of East Coast utilities) showed that more than just changing to a fouling-resistant fill was required to provide and maintain design performance. As described in this article, careful analysis, revision, and continuous monitoring of the chemical water-treatment program were needed as well. At each of Keystone's two units, two natural-draft, hyperbolic towers provide cooling for main-condenser circulating water and service water. The 325-ft-tall towers are counter-current flow, and measure 247 ft across the basin. Film-type fill originally installed in the towers consisted of assemblies of fiber-cement board, 9 ft deep in the center and 7 ft in the peripheral regions. Fiber-cement was also the construction material used in the drift eliminators, and in the piping connected to concrete distribution flumes within the towers.

Gall, G.P.

1993-02-01T23:59:59.000Z

132

Value Capture in the Global Wind Energy Industry  

E-Print Network (OSTI)

of large wind turbine (REpower MM92) Tower Rotor blades GearLiberty turbine, 2008 Component Tower Rotor blades/hub/turbine, 2008 Component Supplier Supplier HQ Tower Gamesa Spain Rotor

Dedrick, Jason; Kraemer, Kenneth L.

2011-01-01T23:59:59.000Z

133

NREL: Wind Research - Shedding Light on Offshore Wind Resources  

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

Shedding Light on Offshore Wind Resources March 22, 2013 View of the Chesapeake Bay light tower in the water. The Chesapeake Bay light tower is located approximately 13 miles from...

134

Evaluation of Wind Shear Patterns at Midwest Wind Energy Facilities: Preprint  

DOE Green Energy (OSTI)

The U.S. Department of Energy-Electric Power Research Institute (DOE-EPRI) Wind Turbine Verification Program (TVP) has included several wind energy facilities in the Midwestern United States. At several of these projects, a strong diurnal shear pattern has been observed. During the day, low and sometimes negative shear has been measured. During night hours, very high positive shear is frequently observed. These high nighttime shear values are of concern due to the potential for high stresses across the rotor. The resulting loads on turbine components could result in failures. Conversely, the effects of high nighttime wind shear could benefit wind generated energy production in the Midwest by providing a source of greater hub-height wind speeds, particularly for multi-megawatt turbines that utilize tall towers. This paper presents an overview of the observed wind shear at each of the Midwest TVP projects, focusing on diurnal patterns and the frequency of very high nighttime shear at the sites. Turbine fault incidence is examined to determine the presence or absence of a correlation to periods of high shear. Implications of shear-related failures are discussed for other Midwest projects that use megawatt-scale turbines. In addition, this paper discusses the importance of accurate shear estimates for project development.

Smith, K.; Randall, G.; Malcolm, D.; Kelley, N.; Smith, B.

2002-05-01T23:59:59.000Z

135

Cooling Tower Technology Conference  

Science Conference Proceedings (OSTI)

Cooling towers and associated systems cause significant loss of availability and heat rate degradation in both nuclear and fossil-fired power plants. Twenty-one papers presented at a 2003 conference in Charleston, South Carolina discussed industrial experience and provided case histories of cooling tower problems and solutions.

2003-08-12T23:59:59.000Z

136

Cooling tower waste reduction  

SciTech Connect

At Lawrence Livermore National Laboratory (LLNL), the two main cooling tower systems (central and northwest) were upgraded during the summer of 1997 to reduce the generation of hazardous waste. In 1996, these two tower systems generated approximately 135,400 lbs (61,400 kg) of hazardous sludge, which is more than 90 percent of the hazardous waste for the site annually. At both, wet decks (cascade reservoirs) were covered to block sunlight. Covering the cascade reservoirs reduced the amount of chemical conditioners (e.g. algaecide and biocide), required and in turn the amount of waste generated was reduced. Additionally, at the northwest cooling tower system, a sand filtration system was installed to allow cyclical filtering and backflushing, and new pumps, piping, and spray nozzles were installed to increase agitation. the appurtenance upgrade increased the efficiency of the cooling towers. The sand filtration system at the northwest cooling tower system enables operators to continuously maintain the cooling tower water quality without taking the towers out of service. Operational costs (including waste handling and disposal) and maintenance activities are compared for the cooling towers before and after upgrades. Additionally, the effectiveness of the sand filter system in conjunction with the wet deck covers (northwest cooling tower system), versus the cascade reservoir covers alone (south cooling tower south) is discussed. the overall expected return on investment is calculated to be in excess of 250 percent. this upgrade has been incorporated into the 1998 DOE complex-wide water conservation project being led by Sandia National Laboratory/Albuquerque.

Coleman, S.J.; Celeste, J.; Chine, R.; Scott, C.

1998-05-01T23:59:59.000Z

137

The Response of Wind-Wave Spectra to Changing Winds. Part I: Increasing Winds  

Science Conference Proceedings (OSTI)

Continuous time series of wind profiles and wind waves under growing conditions, recorded at Shirahama Oceanographic Tower Station and discussed by Kawai, Okada and Toba, have been reanalysed for this study of the response of one-dimensional wind-...

Yoshiaki Toba; Kozo Okada; Ian S. F. Jones

1988-09-01T23:59:59.000Z

138

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

139

Research on 2MW Wind Turbine in the Three Conditions of Modal Analysis Based on ANSYS  

Science Conference Proceedings (OSTI)

In order to prevent a phenomenon of the working wind tower turbine's dumping and fracture, we had done the modal analysis for wind power tower in this paper. by introducing FEA(Finite Element Analysis) methods, the finite element model, simulating actual ... Keywords: Wind turbine towers, Tower model, FEA, Displacement, Equivalent stress

Zhang Penglin; Cao Li

2012-10-01T23:59:59.000Z

140

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity at Different Sites in California and the Northwest  

E-Print Network (OSTI)

towers or operational wind farms are needed to resolveapproach to locating wind farms in the UK. ” Renewablepower from potential wind farm locations in California and

Fripp, Matthias; Wiser, Ryan

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tall tower wind" 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

Comparison of Fatigue and Fracture Properties of Nb- and V ...  

Science Conference Proceedings (OSTI)

In structural applications that are exposed to the environment,? ?such as bridges,? ? wind towers,? ?power transmission towers,? ?even tall buildings,? ?good fatigue ...

142

Dynamic interrelationship between technology and architecture in tall buildings  

E-Print Network (OSTI)

The interrelationship between the technology and architecture of tall buildings is investigated from the emergence of tall buildings in the late 19th century to the present. Through the historical research, a filtering ...

Moon, Kyoung-Sun

2005-01-01T23:59:59.000Z

143

Minnesota | Department of Energy  

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

with Wind Power University of Minnesota's new Clipper Liberty wind turbine and 426-foot tall meteorological tower will allow researchers to work on improving wind turbine...

144

China Solar Tower Development | Open Energy Information  

Open Energy Info (EERE)

Tower Development Jump to: navigation, search Name China Solar Tower Development Place China Sector Solar Product Joint venture for development of solar towers in China, announced...

145

Solar power towers  

DOE Green Energy (OSTI)

The high desert near Barstow, California, has witnessed the development of this country's first two solar power towers. Solar One operated successfully from 1982 to 1988 and proved that power towers work efficiently to produce utility-scale power from sunlight. Solar Two was connected to the utility grid in 1996 and is operating today. Like its predecessor, Solar Two is rated at 10 megawatts. An upgrade of the Solar One plant, Solar Two demonstrates how solar energy can be stored in the form of heat in molten salt for power generation on demand. The experience gained with these two pilot power towers has established a foundation on which industry can develop its first commercial plants. These systems produce electricity on a large scale. They are unique among solar technologies because they can store energy efficiently and cost effectively. They can operate whenever the customer needs power, even after dark or during cloudy weather.

NONE

1998-04-01T23:59:59.000Z

146

Solar power towers  

DOE Green Energy (OSTI)

The high desert near Barstow, California, has witnessed the development of this country`s first two solar power towers. Solar One operated successfully from 1982 to 1988 and proved that power towers work efficiently to produce utility-scale power from sunlight. Solar Two was connected to the utility grid in 1996 and is operating today. Like its predecessor, Solar Two is rated at 10 megawatts. An upgrade of the Solar One plant, Solar Two demonstrates how solar energy can be stored in the form of heat in molten salt for power generation on demand. The experience gained with these two pilot power towers has established a foundation on which industry can develop its first commercial plants. These systems produce electricity on a large scale. They are unique among solar technologies because they can store energy efficiently and cost effectively. They can operate whenever the customer needs power, even after dark or during cloudy weather.

Not Available

1998-04-01T23:59:59.000Z

147

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.

1991-06-01T23:59:59.000Z

148

Flexible dynamics of floating wind turbines  

E-Print Network (OSTI)

This work presents Tower Flex, a structural dynamics model for a coupled analysis of offshore floating wind turbines consisting of a tower, a floating platform and a mooring system. In this multi-body, linear frequency-domain ...

Luypaert, Thomas (Thomas J.)

2012-01-01T23:59:59.000Z

149

Extreme Wind Speed Data Sets: Texas Tech/CSU  

Science Conference Proceedings (OSTI)

... B-indicates a beacon tower exposure. ... 93839 Memphis TN 4 3 1968 123 107 WIND SPEEDS GREATER ... [ SED Home | Extreme Winds Home | Data ...

2013-09-27T23:59:59.000Z

150

Surface and Tower Meteorological Instrumentation at Barrow (METTWR4H) Handbook  

Science Conference Proceedings (OSTI)

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

151

An investigation into the contribution of the low-level jet (LLJ) to the available wind resource in Missouri .  

E-Print Network (OSTI)

??This work uses data (1 September 2006-31 August 2007) from a network of tall-towers to investigate the impact of the nocturnal low-level jet (LLJ) on… (more)

Koleiny, Ali

2009-01-01T23:59:59.000Z

152

Plan for the Wind Power Device to Make the Best of Earth Wind Energy  

Science Conference Proceedings (OSTI)

To make the best of wind energy resources on the earth surface, the plan for a new type of wind power device, named Multiple wind wheel Wind power Device, MWD in short, was put forward. MWD composes steel tower, trusses, generator, long axis, wind turbines ... Keywords: clean renewable sources, wind energy, wind power, wind turbine

Bingwen Zhang; Yingjin Zhang

2010-06-01T23:59:59.000Z

153

Proceedings: Cooling Tower Technology Conference  

Science Conference Proceedings (OSTI)

Cooling towers and associated systems performance strongly affect availability and heat rate in fossil and nuclear power plants. Twenty-two papers presented at the 1997 Cooling Tower Technology Conference discuss research results, industry experience, and case histories of cooling tower problems and solutions.

1997-08-13T23:59:59.000Z

154

Wind Characteristics in Southern Wyoming  

Science Conference Proceedings (OSTI)

Measurements of wind from a network of surface anemometers and a 107 m tower have been analyzed for southern Wyoming where a project for large-scale generation of electricity from wind power is underway. Topographically forced channeling of ...

Brooks E. Martner; John D. Marwitz

1982-12-01T23:59:59.000Z

155

PERFORMANCE ANALYSIS OF MECHANICAL DRAFT COOLING TOWER  

SciTech Connect

Industrial processes use mechanical draft cooling towers (MDCT's) to dissipate waste heat by transferring heat from water to air via evaporative cooling, which causes air humidification. The Savannah River Site (SRS) has cross-flow and counter-current MDCT's consisting of four independent compartments called cells. Each cell has its own fan to help maximize heat transfer between ambient air and circulated water. The primary objective of the work is to simulate the cooling tower performance for the counter-current cooling tower and to conduct a parametric study under different fan speeds and ambient air conditions. The Savannah River National Laboratory (SRNL) developed a computational fluid dynamics (CFD) model and performed the benchmarking analysis against the integral measurement results to accomplish the objective. The model uses three-dimensional steady-state momentum, continuity equations, air-vapor species balance equation, and two-equation turbulence as the basic governing equations. It was assumed that vapor phase is always transported by the continuous air phase with no slip velocity. In this case, water droplet component was considered as discrete phase for the interfacial heat and mass transfer via Lagrangian approach. Thus, the air-vapor mixture model with discrete water droplet phase is used for the analysis. A series of parametric calculations was performed to investigate the impact of wind speeds and ambient conditions on the thermal performance of the cooling tower when fans were operating and when they were turned off. The model was also benchmarked against the literature data and the SRS integral test results for key parameters such as air temperature and humidity at the tower exit and water temperature for given ambient conditions. Detailed results will be published here.

Lee, S; Alfred Garrett, A; James02 Bollinger, J; Larry Koffman, L

2009-02-10T23:59:59.000Z

156

Introducing an Online Cooling Tower Performance Analysis Tool  

E-Print Network (OSTI)

Cooling towers are used extensively for numerous industrial, residential, and commercial applications. Yet despite how common their uses, operators often do not know how to properly evaluate and optimize their performance. This is due to the complex and variable nature of all of the factors that can influence performance; fan speed, wind speed, sump temperature, heat load, ambient temperature, relative humidity, etc. This can be overwhelming for a regular operator resulting in many cooling towers being set to a default operating condition and forgotten. This paper will introduce a web-based cooling tower analysis tool being developed to help users understand and optimize operational efficiency. The calculations, evaluations, and models will be discussed in detail to highlight important design considerations and issues. This will include how the Merkel Theory, psychometric properties, tower types, and historical weather data are incorporated into the analysis.

Muller, M.R.; Muller, M.B.; Rao, P.

2012-01-01T23:59:59.000Z

157

Performance of a Wind-Profiling Lidar in the Region of Wind Turbine Rotor Disks  

Science Conference Proceedings (OSTI)

As the wind energy sector continues to grow, so does the need for reliable vertical wind profiles in the assessment of wind resources and turbine performance. In situ instrumentation mounted on meteorological towers can rarely probe the atmosphere ...

Matthew L. Aitken; Michael E. Rhodes; Julie K. Lundquist

2012-03-01T23:59:59.000Z

158

Abstract On the Automorphism Tower  

E-Print Network (OSTI)

In this thesis I study the automorphism tower of free nilpotent groups. Our main tool in studying the automorphism tower is to embed every group as a lattice in some Lie group. Using known rigidity results the automorphism group of the discrete group can be embedded into the automorphism group of the Lie group. This allows me to lift the description of the derivation tower of the free nilpotent Lie algebra to obtain information about the automorphism tower of the free nilpotent group. The main result in this thesis states that the automorphism tower of the free nilpotent group ?(n, d) on n generators and nilpotency class d, stabilizes after finitely many steps. If the nilpotency class is small compared to the number of generators we have that the height of the automorphism tower is at most

Of Free Nilpotent Groups; Martin Dimitrov Kassabov

2003-01-01T23:59:59.000Z

159

Seismic analysis of lattice towers.  

E-Print Network (OSTI)

??In the absence of specific guidelines for the seismic analysis of self-supporting telecommunication towers, designers may be tempted to apply simplified building code approaches to… (more)

Khedr, Mohamed Abdel Halim.

1998-01-01T23:59:59.000Z

160

Journal of Wind Engineering and Industrial Aerodynamics ] (  

E-Print Network (OSTI)

of hyperbolic cooling towers indicated that wind-induced peak tensile stresses can be more than twice their steady or mean values. This was an important finding for cooling tower designers, who at that time were reeling from the disastrous collapse of a group of cooling towers at Ferrybridge in the UK. Alan's close

Kareem, Ahsan

Note: This page contains sample records for the topic "tall tower wind" 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

Microsoft Word - Tall_Pines_CX.doc  

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

Lee Watts Lee Watts Project Manager - KEWM-4 Proposed Action: Provision of funds to the Idaho Department of Fish and Game for purchase of the Tall Pines Property. Fish and Wildlife Project No.: 1992-061-00 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.25 Transfer, lease, disposition or acquisition of interests in uncontaminated land for habitat preservation or wildlife management, and only associated buildings that support these purposes. Uncontaminated means that there would be no potential for release of substances at a level, or in a form, that would pose a threat to public health or the environment. Location: Township 51 North Range 3 West Section 2 and Township 52 North Range 3 West Section 35, in Kootenai County, Idaho. Parcel is located on the northeastern shore of Hayden

162

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

163

Cooling Towers, Energy Conservation Strategies  

E-Print Network (OSTI)

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. While our engineers are pretty well convinced of the importance of their sophisticated equipment, and rightly so, they take the cooling towers and the cold water returning from them for granted. Design Conditions are specified for the particular requirements before a cooling tower is purchased. After it is put on the line and the cold water temperature or volume becomes inadequate, they look to solutions other than the obvious. While all cooling towers are purchased to function at 100% of capability in accordance with the required Design Conditions, in actual on stream employment, the level of operation many times is lower, downwards to as much as 50% due to a variety of reasons: (1) The present service needed is now greater than the original requirements which the tower was purchased for; (2) 'Slippage' due to usage and perhaps deficient maintenance has reduced the performance of the tower over years of operation; (3) The installation could have been originally undersized due to the low bidder syndrome; and (4) New plant expansion needs colder temperatures off the tower.

Burger, R.

1983-01-01T23:59:59.000Z

164

Flux Sampling Errors for Aircraft and Towers  

Science Conference Proceedings (OSTI)

Various errors and influences leading to differences between tower- and aircraft-measured fluxes are surveyed. This survey is motivated by reports in the literature that aircraft fluxes are sometimes smaller than tower-measured fluxes. Both tower ...

L. Mahrt

1998-04-01T23:59:59.000Z

165

Thermal performance of cooling towers  

SciTech Connect

Wet cooling towers are often used in HVAC applications to reject heat to the atmosphere. Heat rejection is accomplished within the tower by heat and mass transfer between hot water droplets and ambient air. These heat and mass transfer processes and the resulting coefficient of performance are often misunderstood and misinterpreted. To demystify these concepts, the heat and mass transfer exchange at the water droplet level are reviewed. This is followed by an analysis of an idealized spray-type tower to show how cooling tower performance is affected by fill height, water retention time, and air and water mass flow rates. Finally, the so-called coefficient of performance of cooling towers is examined.

Bernier, M.A. [Ecole Polytechnique de Montreal, Quebec (Canada)

1995-04-01T23:59:59.000Z

166

Dry cooling tower operating experience in the LOFT reactor  

SciTech Connect

A dry cooling tower has been uniquely utilized to dissipate heat generated in a small experimental pressurized water nuclear reactor. Operational experience revealed that dry cooling towers can be intermittently operated with minimal wind susceptibility and water hammer occurrences by cooling potential steam sources after a reactor scram, by isolating idle tubes from the external atmosphere, and by operating at relatively high pressures. Operating experience has also revealed that tube freezing can be minimized by incorporating the proper heating and heat loss prevention features.

Hunter, J.A.

1980-01-01T23:59:59.000Z

167

Wind resource assessment handbook: Fundamentals for conducting a successful monitoring program  

Science Conference Proceedings (OSTI)

This handbook presents industry-accepted guidelines for planning and conducting a wind resource measurement program to support a wind energy feasibility initiative. These guidelines, which are detailed and highly technical, emphasize the tasks of selecting, installing, and operating wind measurement equipment, as well as collecting and analyzing the associated data, once one or more measurement sites are located. The handbook's scope encompasses state-of-the-art measurement and analysis techniques at multiple heights on tall towers (e.g., 40 m) for a measurement duration of at least one year. These guidelines do not represent every possible method of conducting a quality wind measurement program, but they address the most important elements based on field-proven experience. The intended audience for this handbook is any organization or individual who desires the planning framework and detailed procedures for conducting a formally structured wind measurement program. Personnel from the management level to field technicians will find this material applicable. The organizational aspects of a measurement program, including the setting of clear program objectives and designing commensurate measurement and quality assurance plans, all of which are essential to ensuring the program's successful outcome, are emphasized. Considerable attention is also given to the details of actually conducting the measurement program in its many aspects, from selecting instrumentation that meets minimum performance standards to analyzing and reporting on the collected data. 5 figs., 15 tabs.

Bailey, B.H.; McDonald, S.L.; Bernadett, D.W.; Markus, M.J.; Elsholz, K.V. [AWS Scientific, Inc., Albany, NY (US)

1997-04-01T23:59:59.000Z

168

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.

169

Wind Equipment: Creating Jobs Along the Lake Erie Shore | Department...  

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

Wind Equipment: Creating Jobs Along the Lake Erie Shore Wind Equipment: Creating Jobs Along the Lake Erie Shore August 16, 2012 - 9:36am Addthis 1 of 3 Finished wind tower sections...

170

Second Wind Sonic Wind Profiler: Cooperative Research and Development Final Report, CRADA number CRD-08-00297  

SciTech Connect

Second Wind will deploy their Triton Sonic Wind Profiler at the National Wind Technology Center for the purposes of verification with measurements made by the NWTC 80 meter Meteorological tower.

Johnson, J. A.

2010-07-01T23:59:59.000Z

171

EU Energy Wind Limited | Open Energy Information  

Open Energy Info (EERE)

company will be concentrating initially on bringing an innovative composite wind tower to market. References EU Energy (Wind) Limited1 LinkedIn Connections CrunchBase Profile No...

172

OUT Success Stories: Power Towers  

DOE Green Energy (OSTI)

Power towers convert the thermal energy of the sun to electricity. They are large-scale power plants producing clean energy and suited for operation in sunny, semi-arid regions of the world.

Jones, J.

2000-08-31T23:59:59.000Z

173

Cooling Towers, Energy Conservation Machines  

E-Print Network (OSTI)

Cooling towers, in all too many industrial plants, are often the neglected units of the process chain which are hidden bonanzas for energy conservation and dollar savings. By lowering the entire systems temperature by the use of colder water returning from the cooling tower, greater chemical product volume can be condensed and less energy is required to run compressors. This paper will discuss two case histories and the rapid cost-effective savings thereby accruing through retrofit.

Burger, R.

1980-01-01T23:59:59.000Z

174

Near-Neutral Surface Layer Turbulence at the Boulder Atmospheric Observatory Tower: Evidence of Increasing Vertical Turbulence with Height  

Science Conference Proceedings (OSTI)

Wind and turbulence profiles were analyzed during breezy, near-neutral conditions at the Boulder Atmospheric Observatory tower to quantify the effects of an abrupt 20- to 30-m increase in terrain located 3–5 km west of the tower. Results indicate ...

Brent M. Bowen

2000-05-01T23:59:59.000Z

175

Tornado type wind turbines  

DOE Patents (OSTI)

A tornado type wind turbine has a vertically disposed wind collecting tower with spaced apart inner and outer walls and a central bore. The upper end of the tower is open while the lower end of the structure is in communication with a wind intake chamber. An opening in the wind chamber is positioned over a turbine which is in driving communication with an electrical generator. An opening between the inner and outer walls at the lower end of the tower permits radially flowing air to enter the space between the inner and outer walls while a vertically disposed opening in the wind collecting tower permits tangentially flowing air to enter the central bore. A porous portion of the inner wall permits the radially flowing air to interact with the tangentially flowing air so as to create an intensified vortex flow which exits out of the top opening of the tower so as to create a low pressure core and thus draw air through the opening of the wind intake chamber so as to drive the turbine.

Hsu, Cheng-Ting (Ames, IA)

1984-01-01T23:59:59.000Z

176

Small Business Innovation Research Grant Helps Propel Innovative Wind  

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

Small Business Innovation Research Grant Helps Propel Innovative Small Business Innovation Research Grant Helps Propel Innovative Wind Energy Small Business Small Business Innovation Research Grant Helps Propel Innovative Wind Energy Small Business March 11, 2011 - 10:32am Addthis Link to image of Wind Tower System's Space Frame Tower™ Link to image of Wind Tower System's Space Frame Tower(tm) Mark Higgins Operations Supervisor, Wind & Water Power Technologies Office Wind Tower Systems, a subsidiary of Wasatch Wind, was founded in 2002 to research, develop and commercialize new ways to make lighter, taller and easier- to-assemble land-based wind turbines. Since then, the Park City, Utah-based small business received early funding from the Department of Energy, which catalyzed investment from the California Energy Commission

177

Kivalina wind generator  

Science Conference Proceedings (OSTI)

The project reported was to construct a system to harness the winds of an Arctic site to generate electricity that would power a greenhouse where fruit and vegetables could be raised for local consumption. The installation of the tower and an Enertech 4K wind generator are described. (LEW)

Aldrich, D.

1984-02-18T23:59:59.000Z

178

WTC Report Urges Action for Safer Tall Buildings  

Science Conference Proceedings (OSTI)

... by each of the 30 recommendations in the final WTC towers report; ... 26 are contained within 43 separate reports (totaling some 10,000 pages ...

2012-12-13T23:59:59.000Z

179

Wind Speeds at Heights Crucial for Wind Energy: Measurements and Verification of Forecasts  

Science Conference Proceedings (OSTI)

Wind speed measurements from one year from meteorological towers and wind turbines at heights between 20 and 250 m for various European sites are analyzed and are compared with operational short-term forecasts of the global ECMWF model. The ...

Susanne Drechsel; Georg J. Mayr; Jakob W. Messner; Reto Stauffer

2012-09-01T23:59:59.000Z

180

Information On Wind Is More Valuable Than Wind Power  

WindPole has 6,000 towers – everywhere you need. – Cost savings, 90 day launch are motivation. – $10k/yr subscription vs $65k one time DIY.

Note: This page contains sample records for the topic "tall tower wind" 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 Dynamic Wind Turbine Simulator of the Wind Turbine Generator System  

Science Conference Proceedings (OSTI)

To study dynamic performances of wind turbine generator system (WTGS), and to determine the control structures in laboratory. The dynamic torque generated by wind turbine (WT) must be simulated. In there paper, a dynamic wind turbine emulator (WTE) is ... Keywords: dynamic wind turbine emulation, wind shear, tower shadow, torque compensation

Lei Lu; Zhen Xie; Xing Zhang; Shuying Yang; Renxian Cao

2012-01-01T23:59:59.000Z

182

WINDTUR1. TXT Large Wind Turbine Machines for ...  

Science Conference Proceedings (OSTI)

... 4. Reducing the diameter of the tower to lessen its shadow effect on the wind striking the turbine. D Suggested design changesO ...

2011-08-02T23:59:59.000Z

183

Property Tax Assessment for Commercial Wind Farms | Department...  

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

valuation method Pennsylvania enacted legislation in November 2006 providing that wind turbines and related equipment (including towers and foundations) may not be counted...

184

3D Simulation of a 5MW Wind Turbine.  

E-Print Network (OSTI)

??In the present work, the influence of turbulence and gravity forces on the tower and the rotor of a 5MW onshore wind turbine has been… (more)

Namiranian, Abtin

2011-01-01T23:59:59.000Z

185

Wind Development on the Rosebud  

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

Rosebud Sioux Rosebud Sioux Indian Reservation Wind Development on the Rosebud Akicita Cikala 750 Kw turbine Owl Feather War Bonnet Wind Farm, 30Mw North Antelope Highlands Wind Farm, 190Mw Met towers installed in 2003 Met tower installed in 2001 Met tower installed in 1999 Met towers installed in 2009 Akicita Cikala Turbine Neg Micon 750kw Commissioned March 2003 Owl Feather War Bonnet Wind Farm 2003 Dept. of Energy Grant DOE Funding $448,551.00 DISGEN Cost share/in-kind $78,750.00 RST/TUC Cost share/in-kind $27,272.00 Participants in Development RST Resource Development Office, Ken Haukaas, Coordinator RST Tribal Utilities Commission, Tony Rogers, Director RST Natural Resource Office, Stephanie Middlebrooks, Wildlife Biologist Distribute Generation Inc., Dale Osborn, President, Belvin Pete, Project

186

WIND DATA REPORT Truro, Massachusetts  

E-Print Network (OSTI)

/RERL_Fact_Sheet_6_Wind_resource_interpretation.pdf * 1 m/s = 2.237 mph. April 4, 2007 Renewable Energy Research - Location of Truro Wind Tower April 4, 2007 Renewable Energy Research Laboratory Page 5 University average plots, and wind roses are included in APPENDIX B. April 4, 2007 Renewable Energy Research

Massachusetts at Amherst, University of

187

WIND DATA REPORT Truro, Massachusetts  

E-Print Network (OSTI)

/RERL_Fact_Sheet_6_Wind_resource_interpretation.pdf * 1 m/s = 2.237 mph. July 17, 2006 Renewable Energy Research - Location of Truro Wind Tower July 17, 2006 Renewable Energy Research Laboratory Page 5 University are greatest from the northeast. The wind rose plot is shown in Figure 7. July 17, 2006 Renewable Energy

Massachusetts at Amherst, University of

188

WIND DATA REPORT Chester, MA  

E-Print Network (OSTI)

/RERL_Fact_Sheet_6_Wind_resource_interpretation.pdf * 1 m/s = 2.237 mph. July 14, 2007 Renewable Energy Research square. Figure 1 - Map of Chester wind tower site July 14, 2007 Renewable Energy Research Laboratory Page average wind speeds are plotted against time. July 14, 2007 Renewable Energy Research Laboratory Page 8

Massachusetts at Amherst, University of

189

Oriented spray-assisted cooling tower  

Science Conference Proceedings (OSTI)

Apparatus useful for heat exchange by evaporative cooling when employed in conjunction with a conventional cooling tower. The arrangement includes a header pipe which is used to divert a portion of the water in the cooling tower supply conduit up stream of the cooling tower to a multiplicity of vertical pipes and spray nozzles which are evenly spaced external to the cooling tower so as to produce a uniform spray pattern oriented toward the central axis of the cooling tower and thereby induce an air flow into the cooling tower which is greater than otherwise achieved. By spraying the water to be cooled towards the cooling tower in a region external to the cooling tower in a manner such that the spray falls just short of the cooling tower basin, the spray does not interfere with the operation of the cooling tower, proper, and the-maximum increase in air velocity is achieved just above the cooling tower basin where it is most effective. The sprayed water lands on a concrete or asphalt apron which extends from the header pipe to the cooling tower basin and is gently sloped towards the cooling tower basin such that the sprayed water drains into the basin. By diverting a portion of the water to be cooled to a multiplicity of sprays external to the cooling tower, thermal performance is improved. 4 figs.

Bowman, C.F.

1995-04-18T23:59:59.000Z

190

SMUD Kokhala Power Tower Study  

DOE Green Energy (OSTI)

Kokhala is the name of a new hybridized power tower design which integrates a nitrate-salt solar power tower with a gas turbine combined-cycle power plant. This integration achieves high value energy, low costs, and lower investor risk than a conventional solar only power tower plant. One of the primary advantages of this system is that it makes small power tower plants much more economically competitive with conventional power generation technologies. This paper is an overview of a study that performed a conceptual evaluation of a small (30 MWe) commercial plant suitable for the Sacramento Municipal Utility District`s (SMUD) Rancho Seco power plant site near Sacramento, California. This paper discusses the motivation for using a small hybrid solar plant and provides an overview of the analysis methodology used in the study. The results indicate that a power tower integrated with an advanced gas turbine, combined with Sacramento`s summer solar resource, could produce a low- risk, economically viable power generation project in the near future.

Price, Henry W. [National Renewable Energy Laboratory, Golden, CO (United States); Whitney, Daniel D.; Beebe, H.I. [Sacramento Municipal Utility District, CA (United States)

1997-06-01T23:59:59.000Z

191

Intercomparison of Wind Measurements from Two Acoustic Doppler Sodars, a Laser Doppler Lidar, and In Situ Sensors  

Science Conference Proceedings (OSTI)

Intercomparative measurements of wind speed, wind direction, wind direction standard deviation, and vertical wind standard deviation from two acoustic Doppler sodars and a laser Doppler lidar are studied, using the BAO tower to provide reference ...

Prasan Chintawongvanich; Robert Olsen; Christopher A. Biltoft

1989-10-01T23:59:59.000Z

192

NIST Manuscript Publication Search  

Science Conference Proceedings (OSTI)

... collapse sequence for each tower; the conduct of ... methods for fire resistance design of structures ... structural collapse; tall buildings; wind engineering. ...

2005-09-01T23:59:59.000Z

193

2011 NERSC NISE Awards Summary Table  

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

superhalogens Michael Kaplan, Desert Research Institute m965 750,000 BER Climate Research Tall Tower Wind Energy Monitoring and Numerical Model Validation in Southern Nevada Noel...

194

NERSC Initiative for Scientific Exploration (NISE) 2011 Awards  

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

in Key U.S. Soils using "omics" Semiclassical Approaches for Clean Energy Resources Tall Tower Wind Energy Monitoring and Numerical Model Validation in Southern Nevada...

195

Nevada | Department of Energy  

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

Improve Grid Reliability February 14, 2011 CX-005201: Categorical Exclusion Determination Tall Tower Wind Energy Monitoring and Numerical Model Validation in Southern Nevada CX(s)...

196

Tall structure lightning induced by sprite-producing discharges.  

SciTech Connect

The large and rapid charge transfer of some +CGs can initiate upward positive leaders from tall structures while simultaneously initiating downward positive streamers below the base of the ionosphere in the form of sprites . Structures with >400 m height have a significantly enhanced probability of launching upward positive leaders, the presence of which is readily detected later if a dart leader propagates down the channel to ground, generating a -CG return stroke. Such tall structures can be repeatedly struck if, as often happens, sprite-producing +CGs repeatedly occur .

Stanley, M. A. (Mark A.); Heavner, M. J. (Matthew J.)

2003-01-01T23:59:59.000Z

197

ARM - Campaign Instrument - aerosol-tower-eml  

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

govInstrumentsaerosol-tower-eml Comments? We would love to hear from you Send us a note below or call us at 1-888-ARM-DATA. Send Campaign Instrument : EML Tower based Aerosol...

198

Sorting in Patrick Geddes' Outlook Tower  

E-Print Network (OSTI)

i n g in P a t r i c k Outlook Tower Geddes' JÈ Joyce Barleythree months at the Outlook 'lower in Edinburgh, sorting theand services. • The Outlook Tower was a disused observatory

Earley, Joyce

1991-01-01T23:59:59.000Z

199

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 food...

200

Proceedings of the Cooling Tower Technology Conference  

Science Conference Proceedings (OSTI)

The performance of cooling towers and associated systems strongly affects availability and heat rate in fossil and nuclear power plants. Twenty-four papers presented at the 2012 Cooling Tower Technology Conference, held August 8–9, 2012, in Pensacola, Florida, discuss research results, industry experience, and case histories of cooling tower problems and solutions. ...

2012-09-13T23:59:59.000Z

Note: This page contains sample records for the topic "tall tower wind" 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

Verification of BModes: Rotary Beam and Tower Modal Analysis Code; Preprint  

DOE Green Energy (OSTI)

This paper describes verification of BModes, a finite-element code developed to provide coupled modes for the blades and tower of a wind turbine. The blades, which may be rotating or non-rotating, and the towers, whether onshore or offshore, are modeled using specialized 15-dof beam finite elements. Both blade and tower models allow a tip attachment, which is assumed to be rigid body with six moments of inertia, and a mass centroid that may be offset from the blade or tower axis. Examples of tip attachments are aerodynamic brakes for blades and nacelle-rotor subassembly for towers. BModes modeling allows for tower supports including tension wires, floating platforms, and monopiles on elastic foundations. Coupled modes (implying coupling of flap, lag, axial, and torsional motions) are required for modeling major flexible components in a modal-based, aeroelastic code such as FAST1. These are also required for validation of turbine models using experimental data, modal-based fatigue analysis, controls design, and understanding aeroelastic-stability behavior of turbines. Verification studies began with uniform tower models, with and without tip inertia, and progressed to realistic towers. For the floating turbine, we accounted for the effects of hydrodynamic inertia, hydrostatic restoring, and mooring lines stiffness. For the monopole-supported tower, we accounted for distributed hydrodynamic mass on the submerged part of the tower and for distributed foundation stiffness. Finally, we verified a model of a blade carrying tip mass and rotating at different speeds (verifications of other blade models, rotating or non-rotating, have been reported in another paper.) Verifications were performed by comparing BModes-generated modes with analytical results, if available, or with MSC.ADAMS results. All results in general show excellent agreement.

Bir, G.

2010-04-01T23:59:59.000Z

202

Process for tertiary oil recovery using tall oil pitch  

DOE Patents (OSTI)

A process and compositions for enhancing the recovery of acid crudes are disclosed. The process involves injecting caustic solutions into the reservoir to maintain a pH of 11 to 13. The fluid contains an effective amount of multivalent cation for inhibiting alkaline silica dissolution with the reservoir. A tall oil pitch soap is added as a polymeric mobility control agent. (DMC)

Radke, C.J.

1983-07-25T23:59:59.000Z

203

Proceedings: Cooling Tower and Advanced Cooling Systems Conference  

Science Conference Proceedings (OSTI)

Cooling towers and associated systems performance strongly affects availability and heat rate in fossil and nuclear power plants. Papers presented at EPRI's 1994 Cooling Tower and Advanced Cooling Systems Conference discuss research results, industry experience, and case histories of cooling tower problems and solutions. Specific topics include cooling tower upgrades and retrofits, cooling tower performance, cooling tower fouling, and dry and hybrid cooling systems.

1995-03-09T23:59:59.000Z

204

Cooling Tower Fan Motor Power Optimization Study  

Science Conference Proceedings (OSTI)

Cooling towers are in use at more than 200 major electric generating plants in the United States, representing approximately 800 units and a total of more than 210,000 MW. The auxiliary power consumed by cooling tower fan motors can significantly reduce the net power output of steam-cycle power plants. Cooling tower specifications are established by the economic and operational requirements of maximum unit load and the most demanding environmental conditions expected in the tower’s locale. Since power pl...

2011-11-16T23:59:59.000Z

205

Comparison of Wind Monitoring Systems. Pad II: Doppley. Sodars  

Science Conference Proceedings (OSTI)

Measurements of wind speed, wind direction, and the vertical component of turbulence, from four different commercially available Doppler sodars, are compared with similar measurements from in situ sensors on a 300 m instrumented tower. Results ...

P. L. Finkelstein; J. C. Kaimal; J. E. Gaynor; M. E. Graves; T. J. Lockhart

1986-12-01T23:59:59.000Z

206

A COOLING SYSTEM FOR BUIDINGS USING WIND ENERGY  

E-Print Network (OSTI)

A COOLING SYSTEM FOR BUIDINGS USING WIND ENERGY Hamid Daiyan Islamic Azad University - Semnan in dray land, and only uses wind energy for conditioning. It technologies date back over 1000 years. Wind system, Wind energy, Temperature Fig.1 Wind tower of Doulat-Abad garden of Yazd with it's altitude is 33

207

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 tower pump suction basin was accomplished by diving into the basin using SCUBA gear. It was possible to see a build-up of debris on the pump suction basket strainers and on the floor of the sumps. Also, it was discovered that one of the four baskets had been installed incorrectly. Photographs of the basket strainers were taken to aid in describing their exact condition. With the aid of SCUBA it was possible to sufficiently clean the pump sumps so that costly downtime was avoided. Likewise, using this technique, steps were taken to greatly reduce the chance for further contamination of the circulating cooling water system.

Brenner, W.

1982-01-01T23:59:59.000Z

208

National-Scale Wind Resource Assessment for Power Generation (Presentation)  

SciTech Connect

This presentation describes the current standards for conducting a national-scale wind resource assessment for power generation, along with the risk/benefit considerations to be considered when beginning a wind resource assessment. The presentation describes changes in turbine technology and viable wind deployment due to more modern turbine technology and taller towers and shows how the Philippines national wind resource assessment evolved over time to reflect changes that arise from updated technologies and taller towers.

Baring-Gould, E. I.

2013-08-01T23:59:59.000Z

209

Energy 101: Wind Turbines | Department of Energy  

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

Wind Turbines Wind Turbines Energy 101: Wind Turbines Addthis Description See how wind turbines generate clean electricity from the power of the wind. Highlighted are the various parts and mechanisms of a modern wind turbine. Duration 2:16 Topic Tax Credits, Rebates, Savings Wind Energy Economy Credit Energy Department Video MR. : We've all seen those creaky old windmills on farms, and although they may seem about as low-tech as you can get, those old windmills are the predecessors for new modern wind turbines that generate electricity. The same wind that used to pump water for cattle is now turning giant wind turbines to power cities and homes. OK, have a look at this wind farm in the California desert, a hot desert next to tall mountains - an ideal place for a lot of wind.

210

Big Spring Wind Power Project Third- Through Fifth-Year Operating Experience: 2001-2004: U.S. Department of Energy-EPRI Wind Turbine Verification Program  

Science Conference Proceedings (OSTI)

This report describes the third-, fourth-, and fifth-year operating experience at the 34-MW Big Spring Wind Power Plant near Big Spring, Texas. The project consists of 42 Vestas V47 wind turbines installed on 65-m (213-ft) towers and four Vestas V66 wind turbines installed on 80-m (262-ft) towers. Lessons learned in the project will be valuable to other utilities and wind power developers planning similar wind power projects.

2004-10-25T23:59:59.000Z

211

Big Spring Wind Power Project Second-Year Operating Experience: 2000-2001: U.S. Department of Energy - EPRI Wind Turbine Verificatio n Program  

Science Conference Proceedings (OSTI)

This report describes second-year operating experience at the 34 MW Big Spring Wind Power Plant near Big Spring, Texas. The project consists of 42 Vestas V47 wind turbines installed on 65-meter (213-foot) towers and 4 Vestas V66 wind turbines installed on 80-meter (262-foot) towers. The lessons learned in the project will be valuable to other utilities and wind power developers planning similar wind power projects.

2001-12-06T23:59:59.000Z

212

WIND DATA REPORT Chester, MA  

E-Print Network (OSTI)

- Map of Chester wind tower site April 11, 2007 Renewable Energy Research Laboratory Page 5 UniversityWIND DATA REPORT Chester, MA December 2006 ­ February 2007 Prepared for Massachusetts Technology April 11, 2007 Report template version 3.1 Renewable Energy Research Laboratory University

Massachusetts at Amherst, University of

213

The Inside of a Wind Turbine | Department of Energy  

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

The Inside of a Wind Turbine The Inside of a Wind Turbine The Inside of a Wind Turbine 1 of 17 Tower: 2 of 17 Tower: Made from tubular steel (shown here), concrete, or steel lattice. Supports the structure of the turbine. Because wind speed increases with height, taller towers enable turbines to capture more energy and generate more electricity. Generator: 3 of 17 Generator: Produces 60-cycle AC electricity; it is usually an off-the-shelf induction generator. High-speed shaft: 4 of 17 High-speed shaft: Drives the generator. Nacelle: 5 of 17 Nacelle: Sits atop the tower and contains the gear box, low- and high-speed shafts, generator, controller, and brake. Some nacelles are large enough for a helicopter to land on. Wind vane: 6 of 17 Wind vane: Measures wind direction and communicates with the yaw drive to orient the

214

Process for tertiary oil recovery using tall oil pitch  

DOE Patents (OSTI)

Compositions and process employing same for enhancing the recovery of residual acid crudes, particularly heavy crudes, by injecting a composition comprising caustic in an amount sufficient to maintain a pH of at least about 11, preferably at least about 13, and a small but effective amount of a multivalent cation for inhibiting alkaline silica dissolution with the reservoir. Preferably a tall oil pitch soap is included and particularly for the heavy crudes a polymeric mobility control agent.

Radke, Clayton J. (El Cerrito, CA)

1985-01-01T23:59:59.000Z

215

Studies on Mathematical Models for Characterizing Plume and Drift Behavior from Cooling Towers, Volume 2: Mathematical Model for Sin gle Source (Single Tower) Cooling Tower Plume Dispersion  

Science Conference Proceedings (OSTI)

Presents an improved model for plumes from single natural-draft cooling towers. This model is expanded to treat multiple tower plumes in Volume 4.

1981-01-01T23:59:59.000Z

216

NREL: Wind Research - Advanced Research Turbines  

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

Research Turbines Two 440 foot meteorological towers are upwind of two research wind turbines. Two 600-kW Westinghouse turbines at the NWTC are used to test new control...

217

Direct drive wind turbine - Energy Innovation Portal  

A wind turbine is provided that minimizes the size of the drive train and nacelle while maintaining the power electronics and transformer at the top of the tower. The ...

218

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":""}]}

219

NREL: Learning - Wind Energy Basics: How Wind Turbines Work  

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

Wind Energy Basics: How Wind Turbines Work Wind Energy Basics: How Wind Turbines Work We have been harnessing the wind's energy for hundreds of years. From old Holland to farms in the United States, windmills have been used for pumping water or grinding grain. Today, the windmill's modern equivalent-a wind turbine-can use the wind's energy to generate electricity. Wind turbines, like windmills, are mounted on a tower to capture the most energy. At 100 feet (30 meters) or more aboveground, they can take advantage of the faster and less turbulent wind. Turbines catch the wind's energy with their propeller-like blades. Usually, two or three blades are mounted on a shaft to form a rotor. A blade acts much like an airplane wing. When the wind blows, a pocket of low-pressure air forms on the downwind side of the blade. The low-pressure

220

Failure of Cooling Tower West Virginia 1978  

Science Conference Proceedings (OSTI)

... The Willow Island disaster was the collapse of a cooling tower under ... In response to this request, NBS carried out field, laboratory and analytical ...

2011-08-12T23:59:59.000Z

Note: This page contains sample records for the topic "tall tower wind" 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

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

Science Conference Proceedings (OSTI)

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

222

Use of a Large Crane for Wind and Tracer Profiles in an Urban Setting  

Science Conference Proceedings (OSTI)

Although measured vertical profiles of wind, turbulence, and tracer concentrations are critical for understanding the urban boundary layer, it is problematic to field a sounding system or a tall structure to support anemometers in a densely ...

Frank J. Gouveia; Martin J. Leach; Joseph H. Shinn; William E. Ralph

2007-10-01T23:59:59.000Z

223

Stability Dependence of the Ratio of Wind Speeds at Two Levels over Agriculture Land  

Science Conference Proceedings (OSTI)

Hourly averaged winds are computed from a one-year record taken atop five 10 m towers and four 30 m towers distributed over 4000 km2 of typical agricultural land. Vertical temperature differences are available from three of the 30 m towers. The ...

Jack H. Shreffler

1980-04-01T23:59:59.000Z

224

Energy 101: Wind Turbines | Department of Energy  

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

Wind Turbines Wind Turbines Energy 101: Wind Turbines Addthis Below is the text version for the Energy 101: Wind Turbines video. The video opens with "Energy 101: Wind Turbines." This is followed by wooden windmills on farms. We've all seen those creaky, old windmills on farms. And although they may seem about as low-tech as you can get, those old windmills are the predecessors for new, modern wind turbines that generat electricity. The video pans through shots of large windmills and wind farms of different sizes, situated on cultivated plains and hills. The same wind that used to pump water for cattle is now turning giant wind turbines to power cities and homes. OK, have a look at this wind farm in the California desert. A hot desert, next to tall mountains. An ideal place for a lot of wind.

225

Combined-cycle power tower  

DOE Green Energy (OSTI)

This paper evaluates a new power tower concept that offers significant benefits for commercialization of power tower technology. The concept uses a molten nitrate salt centralreceiver plant to supply heat, in the form of combustion air preheat, to a conventional combined-cycle power plant. The evaluation focused on first commercial plants, examined three plant capacities (31, 100, and 300 MWe), and compared these plants with a solar-only 100-MWe plant and with gas-only combined-cycle plants in the same three capacities. Results of the analysis point to several benefits relative to the solar-only plant including low energy cost for first plants, low capital cost for first plants, reduced risk with respect to business uncertainties, and the potential for new markets. In addition, the concept appears to have minimal technology development requirements. Significantly, the results show that it is possible to build a first plant with this concept that can compete with existing gas-only combined-cycle plants.

Bohn, M.S.; Williams, T.A.; Price, H.W.

1994-10-01T23:59:59.000Z

226

North American CO2 exchange: Inter comparison of modeled estimates with results from a fine scale atmospheric inversion  

E-Print Network (OSTI)

Monitoring  Division  Tall  Tower  Network,   http://These  include  two  tall  towers  with  a  height  of  dioxide  on  very  tall   towers:    Results  of  the  NOAA/

Gourdji, Sharon M.

2013-01-01T23:59:59.000Z

227

Radar Measurement of Cooling Tower Drift  

Science Conference Proceedings (OSTI)

A method of radar measurement of drift, generated by the wet cooling towers of power plants, is proposed. The water given off by the evaporative towers consists of two kinds of droplets: the recondensation droplets—generally less than 20 ?m in ...

Henri Sauvageot

1989-09-01T23:59:59.000Z

228

2006 EPRI Cooling Tower Technology Conference Proceedings  

Science Conference Proceedings (OSTI)

Cooling towers and associated systems cause significant loss of availability and heat rate degradation in both nuclear and fossil-fired power plants. Fifteen papers presented at a 2006 Conference in Des Moines, Iowa discussed industrial experience and provided case histories of cooling tower problems and solutions.

2006-08-01T23:59:59.000Z

229

SunShot Initiative: CSP Tower Air Brayton Combustor  

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

CSP Tower Air Brayton Combustor to someone by E-mail Share SunShot Initiative: CSP Tower Air Brayton Combustor on Facebook Tweet about SunShot Initiative: CSP Tower Air Brayton...

230

WIND DATA REPORT FALMOUTH, MA  

E-Print Network (OSTI)

by the Renewable Energy Research Laboratory (RERL) at the University of Massachusetts, Amherst. Wind monitoring/RERL_Fact_Sheet_6_Wind_resource_inter pretation.pdf * 1 m/s = 2.25 mph. #12;January 10, 2005 Renewable Energy/s, Offset ­ 0.350 m/s) · 3 - #200P Wind direction vanes Tower location #12;January 10, 2005 Renewable Energy

Massachusetts at Amherst, University of

231

Russian Tall Ship to Search for Missing Tsunami Debris  

E-Print Network (OSTI)

Hafner’s meeting with Captain Sviridenko of the Russian Tall Ship STS Pallada to be on the look-?out for any debris from Japan's tsunami, Hafner was interviewed by KITV4 about any knowldedge of the whereabouts of the debris. To help in efforts to track the debris, the scientists need to validate their models ' projections of the debris field and are asking ships in the North Pacific to report to them on what they see, and if possible take samples. Click here to listen to interview. Websites to see projected tsunami debris paths For the original animation from the statistical model, please visit:

Nikolai Maximenko; Jan Hafner

2011-01-01T23:59:59.000Z

232

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

233

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...

234

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

235

Building a Better Transmission Tower | Department of Energy  

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

software that helped them build cheaper but sturdier towers for new high-voltage transmission lines. Their new towers are stronger but use less steel. They better...

236

Wind Industry Training for Our Military Veterans | Department of Energy  

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

Wind Industry Training for Our Military Veterans Wind Industry Training for Our Military Veterans Wind Industry Training for Our Military Veterans May 31, 2012 - 4:43pm Addthis Gemini's Wind Turbine Tower Rescue courses provide wind technicians with training in safety at height, emergency escape systems and rescue. This course is designed to prepare wind technicians with the knowledge and emergency procedures specific to wind turbines. | Photo by Claudia Trevizo. Gemini's Wind Turbine Tower Rescue courses provide wind technicians with training in safety at height, emergency escape systems and rescue. This course is designed to prepare wind technicians with the knowledge and emergency procedures specific to wind turbines. | Photo by Claudia Trevizo. Debbie Schultheis Technical Project Officer, Wind and Water Power Program

237

Wind Industry Training for Our Military Veterans | Department of Energy  

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

Wind Industry Training for Our Military Veterans Wind Industry Training for Our Military Veterans Wind Industry Training for Our Military Veterans May 31, 2012 - 4:43pm Addthis Gemini's Wind Turbine Tower Rescue courses provide wind technicians with training in safety at height, emergency escape systems and rescue. This course is designed to prepare wind technicians with the knowledge and emergency procedures specific to wind turbines. | Photo by Claudia Trevizo. Gemini's Wind Turbine Tower Rescue courses provide wind technicians with training in safety at height, emergency escape systems and rescue. This course is designed to prepare wind technicians with the knowledge and emergency procedures specific to wind turbines. | Photo by Claudia Trevizo. Debbie Schultheis Technical Project Officer, Wind and Water Power Program

238

Designing an H-rotor type Wind Turbine for Operation on Amundsen-Scott South Pole Station.  

E-Print Network (OSTI)

?? This thesis focuses on designing the turbine, tower structure and generator for an H-rotor type wind turbine. The produced power will be used for… (more)

Wahl, Mats

2007-01-01T23:59:59.000Z

239

Session: What have studies of communications towers suggested regarding the impact of guy wires and lights on birds and bats  

DOE Green Energy (OSTI)

This session at the Wind Energy and Birds/Bats workshop consisted of one presentation followed by a discussion/question and answer period. The paper ''Wind turbines and Avian Risk: Lessons from Communications Towers'' was given by Paul Kerlinger. The presenter outlined lessons that have been learned from research on communications (not cell) towers and about the impacts of guy wires and lights on birds and bats and how they could be useful to wind energy developers. The paper also provided specific information about a large 'fatality' event that occurred at the Mountaineer, WC wind energy site in May 2003, and a table of Night Migrant Carcass search findings for various wind sites in the US.

Kerlinger, Paul

2004-09-01T23:59:59.000Z

240

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

Note: This page contains sample records for the topic "tall tower wind" 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

NREL: News Feature - Change is in the Air at NREL's Wind Center  

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

the landscape surrounding it. One large wind turbine is in the foreground with four other wind turbines behind it, as well as several buildings and met towers. Mountains are in the...

242

Noise from cooling towers of power parks  

SciTech Connect

A study is presented of the noise pollution problem for large power parks proposed for the future. Such parks might have an area of about 75 sq. miles, and a generating capacity up to 48000 MW. A comparative analysis has been done for natural and mechanical-draft wet towers as the major sources of acoustic power. Noise radiation from single isolated towers as well as from a dispersed array of towers has been considered for both types of cooling systems. Major noise attenuation effects considered are due to the atmospheric absorption and A- weighting. Conditions of 60F and 70 percent relative humidity in a still atmosphere have been assumed. (auth)

Zakaria, J.; Moore, F.K.

1975-10-14T23:59:59.000Z

243

America's Wind Testing Facilities | Department of Energy  

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

Wind Testing Facilities Wind Testing Facilities America's Wind Testing Facilities Addthis National Wind Technology Center - Colorado 1 of 7 National Wind Technology Center - Colorado The first of 4 towers is lifted as work continues on the 2 MW Gamesa wind turbine being installed at NREL's National Wind Technology Center (NWTC). | Photo by Dennis Schroeder. Date taken: 2011-09-15 13:53 National Wind Technology Center - Colorado 2 of 7 National Wind Technology Center - Colorado Workers use a giant crane for lifting the blade assembly as work continues on the 2 MW Gamesa wind turbine being installed at NREL's National Wind Technology Center (NWTC). | Photo by Dennis Schroeder. Date taken: 2011-09-22 12:06 Wind Technology Testing Center - Boston 3 of 7 Wind Technology Testing Center - Boston

244

Passive Acoustic Detection of Wind Turbine In-Flow Conditions for Active Control and Optimization  

DOE Green Energy (OSTI)

Wind is a significant source of energy; however, the human capability to produce electrical energy still has many hurdles to overcome. One of these is the unpredictability of the winds in the atmospheric boundary layer (ABL). The ABL is highly turbulent in both stable and unstable conditions (based on the vertical temperature profile) and the resulting fluctuations can have a dramatic impact on wind turbine operation. Any method by which these fluctuations could be observed, estimated, or predicted could provide a benefit to the wind energy industry as a whole. Based on the fundamental coupling of velocity fluctuations to pressure fluctuations in the nearly incompressible flow in the ABL, This work hypothesizes that a ground-based array of infrasonic pressure transducers could be employed to estimate the vertical wind profile over a height relevant for wind turbines. To analyze this hypothesis, experiments and field deployments were conducted. Wind tunnel experiments were performed for a thick turbulent boundary layer over a neutral or heated surface. Surface pressure and velocity probe measurements were acquired simultaneously. Two field deployments yielded surface pressure data from a 49 element array. The second deployment at the Reese Technology Center in Lubbock, TX, also included data from a smaller aperture, 96-element array and a 200-meter tall meteorological tower. Analysis of the data successfully demonstrated the ability to estimate the vertical velocity profile using coherence data from the pressure array. Also, dynamical systems analysis methods were successful in identifying and tracking a gust type event. In addition to the passive acoustic profiling method, this program also investigated a rapid response Doppler SODAR system, the optimization of wind turbine blades for enhanced power with reduced aeroacoustic noise production, and the implementation of a wireless health monitoring system for the wind turbine blades. Each of these other objectives was met successfully. The use of phase unwrapping applied to SODAR data was found to yield reasonable results for per-pulse measurements. A health monitoring system design analysis was able to demonstrate the ability to use a very small number of sensors to monitor blade health based on the blade's overall structural modes. Most notable was the development of a multi-objective optimization methodology that successfully yielded an aerodynamic blade design that produces greater power output with reduced aerodynamic loading noise. This optimization method could be significant for future design work.

Murray, Nathan E.

2012-03-12T23:59:59.000Z

245

Small Business Innovation Research Grant Helps Propel Innovative Wind Energy Small Business  

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

With the support of $850,000 in Phase I and II Small Business Innovation Research (SBIR) grants from the Department in 2002 and 2003, Wind Tower Systems was able to complete the final engineering design for the 100 meter wind turbine tower that GE now plans to market.

246

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

247

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

248

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, and other associates heat rejection equipment.

Matson, J.

1991-06-01T23:59:59.000Z

249

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.

250

Cooling Tower Considerations for Energy Optimizations  

E-Print Network (OSTI)

Energy conservation strategies and production economies involve more than examining the cooling tower fan consumption of horse power. Colder water provides vast potentials for savings. Ask yourself, "What is the dollar and energy utilization value if I can obtain 1°F colder water off my cooling tower than I am now getting?" Therefore, let us first examine the elements of the cooling tower to determine the areas of greatest potential improvement to generate that colder water. The air flow generated by the fan should first be looked at In both counterflow or crossflow towers to determine that maximum flow is available through pitching fans up to within the motor plate amperage limitations and fan stall point calculations. If applicable, new fiberglass state of the art fans can be installed and additional motor horse power added. However, the most dramatic improvement that can be obtained in producing colder water is to retrofit modern film fill to replace the old fashioned wood splash bar slats.

Burger, R.

1986-01-01T23:59:59.000Z

251

Photo of the Week: Wheat and Wind | Department of Energy  

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

Wheat and Wind Wheat and Wind Photo of the Week: Wheat and Wind December 14, 2012 - 2:33pm Addthis From 262 feet in the air, 90 General Electric towers rise over Wheatland County, Montana, generating electricity for portions of the northwest United States. With an installed capacity of 135 MW, the Judith Gap Energy Center is one of the strongest wind farms in Montana. The blades begin spinning when winds reach just eight miles per hour, and at their highest point, tower almost 400 feet above the ground. In this photo, the wind turbines rotate while overlooking Wheatland County's main agricultural product: wheat. | Photo courtesy of Idaho National Laboratory Wind Energy Program. From 262 feet in the air, 90 General Electric towers rise over Wheatland County, Montana, generating electricity for portions of the northwest

252

Wind Energy & Manufacturing | Open Energy Information  

Open Energy Info (EERE)

Wind Energy & Manufacturing Wind Energy & Manufacturing Jump to: navigation, search Blades manufactured at Gamesa's factory in Ebensburg, Pennsylvania, await delivery for development of wind farms across the country in the United States. Photo from Gamesa, NREL 16001 Wind power creates new high-paying jobs in a wide variety of industries. This includes direct jobs installing, operating, and maintaining wind turbines, as well as jobs at manufacturing facilities that produce wind turbines, blades, electronic components, gearboxes, generators, towers, and other equipment. Indirect jobs in the industries that support these activities are also created.[1] In 2012, 72% of the wind turbine equipment (including towers, blades, and gears) installed in the United States during the year was made in

253

INL Wind Farm Project Description Document  

DOE Green Energy (OSTI)

The INL Wind Farm project proposes to install a 20 MW to 40 MW wind farm on government property, consisting of approximately ten to twenty full-sized (80-meter hub height) towers with 2 MW turbines, and access roads. This includes identifying the optimal turbine locations, building access roads, and pouring the tower foundations in preparation for turbine installation. The project successfully identified a location on INL lands with commercially viable wind resources (i.e., greater than 11 mph sustained winds) for a 20 to 40 MW wind farm. Additionally, the proposed Wind Farm was evaluated against other General Plant Projects, General Purpose Capital Equipment projects, and Line Item Construction Projects at the INL to show the relative importance of the proposed Wind Farm project.

Gary Siefert

2009-07-01T23:59:59.000Z

254

Seismic response of a tower as measured by an integrated RTK-GPS system  

E-Print Network (OSTI)

Monitoring structural response induced by seismic waves is an efficient way to mitigate the damage of earthquakes. For example, the measured signal can be used to activate an alarm system in order to evacuate people from an endangered building, or to drive a control system to suppress earthquake-excited vibrations so as to protect the integrity of the structure, or to assess post-seismic damage to a structure. Traditionally such vibrations have been measured solely by accelerometers. However, it is impossible to measure the static and semi-static components of the movement with accelerometers. An integrated system combining RTK-GPS and accelerometers has been deployed atop a 108m tall tower in Tokyo in order to monitor its structural integrity on a continuous basis. Data acquired during earthquakes are automatically archived. In this paper, the seismic responses of the tower were analysed using Fast Fourier Transformation (FFT) of the GPS and accelerometer measurements. The data were also converted to displacement (in the case of accelerometer) and acceleration (in the case of GPS) through double-integration and double-differentiation respectively, for the purpose of direct comparison. The results agreed with each other well, except that the static component was

Xiaojing Li; Linlin Ge; Yukio Tamura; Akihito Yoshida; Chris Rizos; Gang-ding Peng

2004-01-01T23:59:59.000Z

255

The Association of Tall Eyewall Convection with Tropical Cyclone Intensification .  

E-Print Network (OSTI)

??Despite decades of research, operational weather agencies still find it difficult to predict change in the intensity of a tropical cyclone's surface wind. This dissertation… (more)

Kelley, Owen A.

2008-01-01T23:59:59.000Z

256

FILES- COOLING TOWER PLUME MODELING  

E-Print Network (OSTI)

Ladies and Gentlemen:? In the referenced letter, Progress Energy Carolinas, Inc. (PEC) noted that the input and output' files for the modeling analysis for cooling tower plumes would be provided under a separate cover. due to the requirements for native file submittal (see NRC RAI # 5.3.3.1-1 and PGN RAI # H-295). The purpose of this letter is to submit these calculation native files. The supplemental information contained in the files on the attached CD is provided to support the NRC's review of the Shearon Harris Nuclear Power Plant Units 2 and 3 (HAR) Environmental Report (ER), but does not comply with the requirements for electronic submission in the NRC Guidance Document. The NRC staff requested the files be submitted in their native formats, required for utilization in the software employed to support the ER development. As discussed with the NRC's environmental project manager responsible for review of the HAR ER, the data provided on the attached CD are of a nature that is not easily convertible to PDF output files. Furthermore, PEC understands that converting the information to PDF output files; would not serve the underlying purpose of the submittal; i.e., to provide the raw, unprocessed data to enable reviewers to evaluate software used in the HAR application. Enclosure 1 provides a list of folders with the requested data files that are included on the attached CD (Attachment 5.3.3.1-1 SACTI Native Files). If you have any further questions, or need additional information, please contact Bob Kitchen at

Garry D. Mi Er

2009-01-01T23:59:59.000Z

257

Evaluation of icing design criteria for lattice towers.  

E-Print Network (OSTI)

??Atmospheric icing is a major design factor for guyed lattice masts and transmission lines in Canada and many others countries with cold climate. Tall and… (more)

Korotkov, Oleksiy

2010-01-01T23:59:59.000Z

258

NREL: Wind Research - Facilities  

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

Facilities Facilities Our facilities are designed to meet the wind industry's critical research needs with state-of-the-art design and testing facilities. NREL's unique and highly versatile facilities at the National Wind Technology Center offer research and analysis of wind turbine components and prototypes rated from 400 watts to 3 megawatts. Satellite facilities support the growth of wind energy development across the United States. National Wind Technology Center Facilities Our facilities are contained within a 305-acre area that comprises field test sites, test laboratories, industrial high-bay work areas, machine shops, electronics and instrumentation laboratories, and office areas. In addition, there are hundreds of test articles and supporting components such as turbines, meteorological towers, custom test apparatus, test sheds,

259

Wind turbine spoiler  

DOE Patents (OSTI)

An aerodynamic spoiler system for a vertical axis wind turbine includes spoilers on the blades initially stored near the rotor axis to minimize drag. A solenoid latch adjacent the central support tower releases the spoilers and centrifugal force causes the spoilers to move up the turbine blades away from the rotor axis, thereby producing a braking effect and actual slowing of the associated wind turbine, if desired. The spoiler system can also be used as an infinitely variable power control by regulated movement of the spoilers on the blades over the range between the undeployed and fully deployed positions. This is done by the use of a suitable powered reel and cable located at the rotor tower to move the spoilers.

Sullivan, William N. (Albuquerque, NM)

1985-01-01T23:59:59.000Z

260

Review on Seismic Rehabilitation of a 56-Story RC Tall Building having Shear Wall System Based on A Nonlinear Dynamic Performance Evaluation  

Science Conference Proceedings (OSTI)

Tehran tower is a 56 story reinforced concrete tall building consisting of three wings with identical plan dimensions each approximately 48 meters by 22 meters. The three wings are at 120 degree from each other and have no expansions/seismic Joints. This paper contains the consideration of the retrofitting of the Tehran tower based on the findings of an exhaustive investigation of the nonlinear performance evaluation efforts. It has tried to show the procedure followed, methodologies utilized, and the results obtained for life-safety and collapse-prevention evaluation of the building. More over the weak zones of the structure due to analysis results are introduced and appropriate retrofit technique for satisfaction related life-safety and collapse-prevention criteria is presented. Actually in this project to improve the local behavior of coupling panels which are located regularly in main walls and definitely have been recognized as the most vulnerable structural elements, making use of steel plates which are connected to concrete members by chemical anchors has been used as the best retrofitting method for this case. Therefore in the final section of this paper it has been tried to explain the professional practical method utilized to perform the mentioned retrofitting project.

Epackachi, S.; Esmaili, O. [School of Civil Engineering, University of Tehran, Tehran (Iran, Islamic Republic of); Mirghaderi, S. R. [School of Civil Engineering, University of Tehran, Tehran (Iran, Islamic Republic of); The Committee for Revising the Iranian Code of Practice for Seismic Resistance Design of Buildings, Tehran (Iran, Islamic Republic of); Taheri, A. A. [The Committee for Revising the Iranian Code of Practice for Seismic Resistance Design of Buildings, Tehran (Iran, Islamic Republic of)

2008-07-08T23:59:59.000Z

Note: This page contains sample records for the topic "tall tower wind" 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

Envisioning Radical Futures -- New York City 2106: Back to the Future  

E-Print Network (OSTI)

proposes that tall curvilinear “water towers” would populatethe towers would trans- late New York’s tradition of tall

Yarinsky, Adam

2008-01-01T23:59:59.000Z

262

Regional CO2 and latent heat surface fluxes in the Southern Great Plains: Measurements, modeling, and scaling  

E-Print Network (OSTI)

a mixed forest from tall tower mixing ratio measurements,vapor measurements from a tall tower, Journal of Geophysical

Riley, W. J.

2010-01-01T23:59:59.000Z

263

Finite element modeling of transmission line under downburst wind loading  

Science Conference Proceedings (OSTI)

Despite the fact that extensive research has been carried out on transmission lines subjected to normal wind loads, their behaviour under high intensity wind loads (HIW), such as downburst, is poorly defined. This paper describes a detailed numerical ... Keywords: Downbursts, Finite element, Microbursts, Transmission line, Transmission tower, Wind load

A. Y. Shehata; A. A. El Damatty; E. Savory

2005-10-01T23:59:59.000Z

264

Wet cooling towers: rule-of-thumb design and simulation  

DOE Green Energy (OSTI)

A survey of wet cooling tower literature was performed to develop a simplified method of cooling tower design and simulation for use in power plant cycle optimization. The theory of heat exchange in wet cooling towers is briefly summarized. The Merkel equation (the fundamental equation of heat transfer in wet cooling towers) is presented and discussed. The cooling tower fill constant (Ka) is defined and values derived. A rule-of-thumb method for the optimized design of cooling towers is presented. The rule-of-thumb design method provides information useful in power plant cycle optimization, including tower dimensions, water consumption rate, exit air temperature, power requirements and construction cost. In addition, a method for simulation of cooling tower performance at various operating conditions is presented. This information is also useful in power plant cycle evaluation. Using the information presented, it will be possible to incorporate wet cooling tower design and simulation into a procedure to evaluate and optimize power plant cycles.

Leeper, S.A.

1981-07-01T23:59:59.000Z

265

CFD MODELING AND ANALYSIS FOR A-AREA AND H-AREA COOLING TOWERS  

Science Conference Proceedings (OSTI)

Mechanical draft cooling towers are designed to cool process water via sensible and latent heat transfer to air. Heat and mass transfer take place simultaneously. Heat is transferred as sensible heat due to the temperature difference between liquid and gas phases, and as the latent heat of the water as it evaporates. Mass of water vapor is transferred due to the difference between the vapor pressure at the air-liquid interface and the partial pressure of water vapor in the bulk of the air. Equations to govern these phenomena are discussed here. The governing equations are solved by taking a computational fluid dynamics (CFD) approach. The purpose of the work is to develop a three-dimensional CFD model to evaluate the flow patterns inside the cooling tower cell driven by cooling fan and wind, considering the cooling fans to be on or off. Two types of the cooling towers are considered here. One is cross-flow type cooling tower located in A-Area, and the other is counterflow type cooling tower located in H-Area. The cooling tower located in A-Area is mechanical draft cooling tower (MDCT) consisting of four compartment cells as shown in Fig. 1. It is 13.7m wide, 36.8m long, and 9.4m high. Each cell has its own cooling fan and shroud without any flow communications between two adjacent cells. There are water distribution decks on both sides of the fan shroud. The deck floor has an array of about 25mm size holes through which water droplet falls into the cell region cooled by the ambient air driven by fan and wind, and it is eventually collected in basin area. As shown in Fig. 1, about 0.15-m thick drift eliminator allows ambient air to be humidified through the evaporative cooling process without entrainment of water droplets into the shroud exit. The H-Area cooling tower is about 7.3 m wide, 29.3 m long, and 9.0 m high. Each cell has its own cooling fan and shroud, but each of two corner cells has two panels to shield wind at the bottom of the cells. There is some degree of flow communications between adjacent cells through the 9-in gap at the bottom of the tower cells as shown in Fig. 2. Detailed geometrical dimensions for the H-Area tower configurations are presented in the figure. The model was benchmarked and verified against off-site and on-site test results. The verified model was applied to the investigation of cooling fan and wind effects on water cooling in cells when fans are off and on. This report will discuss the modeling and test results.

Lee, S.; Garrett, A.; Bollinger, J.

2009-09-02T23:59:59.000Z

266

New North Dakota Factory to Produce Wind Towers, Jobs | Department...  

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

that keeps moving forward," with construction targeted for as early as this fall. Schuff Steel, which received a 7 million federal tax credit under the Recovery Act Section 48C...

267

Best Practice for Energy Efficient Cleanrooms: Cooling tower and condenser water optimization  

E-Print Network (OSTI)

Cleanrooms: Cooling Tower and Condenser Water OptimizationCleanrooms: Cooling tower and condenser water optimization2 Cooling tower and condenser water

Xu, Tengfang

2005-01-01T23:59:59.000Z

268

Best Practice for Energy Efficient Cleanrooms: Cooling tower and condenser water optimization  

E-Print Network (OSTI)

Efficient Cleanrooms: Cooling Tower and Condenser WaterEfficient Cleanrooms: Cooling tower and condenser water2 Cooling tower and condenser water

Xu, Tengfang

2005-01-01T23:59:59.000Z

269

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":""}]}

270

The evaluation of retrofit measures in a tall residential building  

SciTech Connect

As part of a joint demonstration effort involving the US Department of Energy (DOE), the US Department of Housing and Urban Development (HUD), Boston Edison Company (BECo), and the Chelsea Housing Authority, Oak Ridge National Laboratory (ORNL) participated in the evaluation of energy and demand saving retrofits for a tall residential building located in Boston. The thirteen story all-electric building underwent window, lighting, and control renovations in December, 1992. annual energy consumption was reduced by 15% and peak demand fell by 17%. Hourly should building consumption data were available for the comparison of pre- and post- conditions and for calibration of a DOE-2.1D simulation model. The analysis found the window retrofit accounted for 90% of total energy savings and 95% of average demand savings, due to reductions in both conduction and infiltration. Benefits from lighting retrofits were low in cooling months and negligible in winter months due to the increase in the demand for electric resistance heating which was proportional to the reduction in lighting capacity. Finally, the simulation model verified that heating system controls had not been used as intended, and that the utility rate structure would not allow cost savings from the original control strategy. These results and other interesting lessons learned are presented.

Abraham, M.M.; McLain, H.A.

1995-07-01T23:59:59.000Z

271

Tall buildings in Asia : a critique on the high-rise building in Colombo, Shri Lanka  

E-Print Network (OSTI)

The recent generation of tall buildings in Asia have been appropriated from the West with little adaptation. With no understanding of the forces that have generated this building form, Asia embraces the high-rise as an ...

Pieris, Anoma D. (Anoma Darshani)

1993-01-01T23:59:59.000Z

272

The role of the aerodynamic modifications of the shapes of tall buildings  

E-Print Network (OSTI)

With the advances in technology, recent tall building design has undergone a shift to the free-style geometric forms in the exuberant and liberal atmosphere. As a height of the building increases, it is more susceptible ...

Lee, Jooeun, S.M. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

273

A technique to measure turbulent free convective heat transfer in a vertical tall cavity.  

E-Print Network (OSTI)

??A time-average technique was developed to measure the unsteady and turbulent free convection heat transfer in tall vertical enclosure using a Mach-Zehnder interferometer. The method… (more)

Poulad, Mohammad Ebrahim

2009-01-01T23:59:59.000Z

274

Evaluation of Turbulent Surface Flux Parameterizations over Tall Grass in a Beijing Suburb  

Science Conference Proceedings (OSTI)

Numerical weather and climate prediction systems necessitate accurate land surface–atmosphere fluxes, whose determination typically replies on a suite of parameterization schemes. The authors present a field investigation over tall grass in a ...

Linlin Wang; Zhiqiu Gao; Zaitao Pan; Xiaofeng Guo; Elie Bou-Zeid

2013-10-01T23:59:59.000Z

275

Numerical Simulation of Flow around a Tall Isolated Seamount. Part II: Resonant Generation of Trapped Waves  

Science Conference Proceedings (OSTI)

A sigma-coordinate, primitive equation ocean circulation model is used to explore the problem of the remnant generation of trapped waves about a tall, circular, isolated seamount by an incident oscillatory barotropic current. The numerical ...

Dale B. Haidvogel; Aike Beckmann; David C. Chapman; Ray-Qing Lin

1993-11-01T23:59:59.000Z

276

Wind Monitoring Report for Fort Wainwright's Donnelly Training Area  

DOE Green Energy (OSTI)

Using the wind data collected at a location in Fort Wainwright’s Donnelly Training Area (DTA) near the Cold Regions Test Center (CRTC) test track, Pacific Northwest National Laboratory (PNNL) estimated the gross and net energy productions that proposed turbine models would have produced exposed to the wind resource measured at the meteorological tower (met tower) location during the year of measurement. Calculations are based on the proposed turbine models’ standard atmospheric conditions power curves, the annual average wind speeds, wind shear estimates, and standard industry assumptions.

Orrell, Alice C.; Dixon, Douglas R.

2011-01-18T23:59:59.000Z

277

BOREAS SSA-YJP Tower Flux Data Revised  

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

Tower Flux Data Revised A revised version of the BOREAS TF04 tower flux data is now available from the ORNL DAAC. Data providers have revised the data set entitled "BOREAS TF-04...

278

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 is employed to predict the cooling tower performance at various conditions. Natural convection when the fan is off is accounted by using an assumed airflow rate. The energy savings at five cities representing different typical climates are studied using typical meteorological year data. The results show that, if the tower capacity can be increased by 50% and 100% by running extra tower cells, the annual total fan power usage can be reduced by 44% and 61%, respectively. A cumulative saving percent curve is generated to help estimate the annual total savings percent when extra cooling tower capacity is available during only part of a year.

Zhang, Z.; Liu, J.

2012-01-01T23:59:59.000Z

279

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 on the roof or located somewhere in the backyard. When the cooling water 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 of energy conservation, 3) ... can be big money makers, and 4 ) .. . operators should be aware of the potential of maximizing cold water. Most towers designed over 20 years ago were inefficiently engineered due to cheap power and the "low bidder" syndrome. Operating energy costs were ignored and purchasing criteria was to award the contract to the lowest bidder. This paper investigates internal elements of typical towers, delineates their functions and shows how to upgrade them in the real world for energy savings and profitability of operation.

Burger, R.

1985-01-01T23:59:59.000Z

280

Cooling Towers, The Neglected Energy Resource  

E-Print Network (OSTI)

Loving care is paid to the compressors, condensers, and computer programs of refrigeration and air conditioning systems. When problems arise, operators and engineers run around in circles with expensive "fixes" , but historically ignore the poor orphan of the system, the cooling tower perched on the roof or located somewhere in the backyard. When cooling water 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 of energy conservation; 3) can be big money makers; 4) operators should be aware of the potential of maximising cold water. Most towers were designed over 20 years ago and were inefficiently engineered due to cheap power and the "low bidder gets the sale" syndrome. Operating energy costs were ignored and purchasing criteria was to award the contract to the lowest bidder. All too often the low bidder - even though some of the most respected firms were involved - cut thermal corners for the sale. This paper investigates the internal elements of the typical types of cooling towers currently used, delineates their functions and shows how to upgrade them in the real world for energy savings and profitability of operation. Hard before and after statistics of costs and profits obtained through optimization of colder water by engineered thermal upgrading will be discussed. Salient points will be reenforced with on-the-job, hands-on, slides and illustrations.

Burger, R.

1987-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "tall tower wind" 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

Untapped Energy Savings from Cooling Towers  

E-Print Network (OSTI)

A cooling tower is often an overlooked source of easy energy savings. As long as it's running not much thought is usually given to it, but when numbers are applied to how much a degree of colder water is worth it can become a valuable and ready source of energy and monetary savings. Many of these savings can come from simple maintenance or by changing the way the tower is operated. The more dramatic savings can come from changing to advanced fill concepts. Over our 40 years of working in the cooling tower industry we have measured the effects of doing simple maintenance, the effects of blocking air flow with seemingly good ideas like maintenance walkways, the effects of nearby heat sources, and what fill changes are likely to get. We have put numbers to what a degree is worth to a large petrochemical company so you can get an idea of the magnitude of what these sometimes simple changes are actually worth. Also, we've included a way to monitor your tower for changes in performance.

Phelps Jr., P.

2011-01-01T23:59:59.000Z

282

Wastewater Reuse as Cooling-Tower Makeup  

Science Conference Proceedings (OSTI)

As many parts of the United States begin to face shortages, utilities will look for reliable new water sources. Focusing on the use of wastewater as makeup to cooling towers, this report describes commercially available wastewater treatments for power plant applications and highlights the need for research to control biologic slime and phosphate scale formation.

1987-09-02T23:59:59.000Z

283

Bassett Mechanical Explores Mid-size Wind Market | Department of Energy  

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

Bassett Mechanical Explores Mid-size Wind Market Bassett Mechanical Explores Mid-size Wind Market Bassett Mechanical Explores Mid-size Wind Market May 7, 2010 - 10:07am Addthis Bassett employees work on embedment (anchor) rings for the wind turbine foundations. Bassett just received a 48C tax credit to invest in capital equipment for wind turbine tower manufacturing.| Photo courtesy Bassett Mechanical Bassett employees work on embedment (anchor) rings for the wind turbine foundations. Bassett just received a 48C tax credit to invest in capital equipment for wind turbine tower manufacturing.| Photo courtesy Bassett Mechanical Lindsay Gsell About five years ago, Wisconsin's Bassett Mechanical began branching into renewable energy. The nearly 75-year-old company started producing components used to anchor the towers of wind turbines to their foundations.

284

Wind for Schools Project Power System Brief  

DOE Green Energy (OSTI)

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

285

NREL: Wind-Wildlife Impacts Literature Database (WILD) Home Page  

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

Wind-Wildlife Impacts Literature Database (WILD) Wind Research WILD WILD Wind-Wildlife Impacts Literature Database (WILD) Wind Research WILD WILD Browse By Reset All Geography Africa (11) Apply Africa filter Asia (12) Apply Asia filter Australia and Oceania (10) Apply Australia and Oceania filter Europe (219) Apply Europe filter Global (7) Apply Global filter North America (217) Apply North America filter Technology Land-Based Wind (280) Apply Land-Based Wind filter Marine Energy (58) Apply Marine Energy filter Offshore Wind (161) Apply Offshore Wind filter Power Lines (66) Apply Power Lines filter Towers (23) Apply Towers filter Animal Birds (334) Apply Birds filter Fish (71) Apply Fish filter Invertebrates (44) Apply Invertebrates filter Mammals (185) Apply Mammals filter Reptiles (10) Apply Reptiles filter Publication Year 2013 (92) Apply 2013 filter

286

Effects of a tuned mass damper on wind-induced motions in tall buildings  

E-Print Network (OSTI)

With ever increasing constructability capacities, engineers have found solutions to build taller and taller structures. However, the race for the sky has not only brought up new ways of building, it has also created new ...

Carlot, Julien (Julien Alexandre Laurent)

2012-01-01T23:59:59.000Z

287

Wind Spires as an Alternative Energy Source  

Science Conference Proceedings (OSTI)

This report discloses the design and development of an innovative wind tower system having an axisymmetric wind deflecting structure with a plurality of symmetrically mounted rooftop size wind turbines near the axisymmetric structure. The purpose of the wind deflecting structure is to increase the ambient wind speed that in turn results in an overall increase in the power capacity of the wind turbines. Two working prototypes were constructed and installed in the summer of 2009 and 2012 respectively. The system installed in the Summer of 2009 has a cylindrical wind deflecting structure, while the tower installed in 2012 has a spiral-shape wind deflecting structure. Each tower has 4 turbines, each rated at 1.65 KW Name-Plate-Rating. Before fabricating the full-size prototypes, computational fluid dynamic (CFD) analyses and scaled-down table-top models were used to predict the performance of the full-scale models. The performance results obtained from the full-size prototypes validated the results obtained from the computational models and those of the scaled-down models. The second prototype (spiral configuration) showed at a wind speed of 11 miles per hour (4.9 m/s) the power output of the system could reach 1,288 watt, when a typical turbine installation, with no wind deflecting structure, could produce only 200 watt by the same turbines at the same wind speed. At a wind speed of 18 miles per hour (8 m/sec), the spiral prototype produces 6,143 watt, while the power generated by the same turbines would be 1,412 watt in the absence of a wind deflecting structure under the same wind speed. Four US patents were allowed, and are in print, as the results of this project (US 7,540,706, US 7,679,209, US 7,845,904, and US 8,002,516).

Majid Rashidi, Ph.D., P.E.

2012-10-30T23:59:59.000Z

288

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

289

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

290

Wet/dry cooling tower and method  

DOE Patents (OSTI)

A wet/dry cooling tower wherein a liquid to-be-cooled is flowed along channels of a corrugated open surface or the like, which surface is swept by cooling air. The amount of the surface covered by the liquid is kept small compared to the dry part thereof so that said dry part acts as a fin for the wet part for heat dissipation.

Glicksman, Leon R. (Lynnfield, MA); Rohsenow, Warren R. (Waban, MA)

1981-01-01T23:59:59.000Z

291

Update: Cooling tower and spray pond technology  

SciTech Connect

The 9th Cooling Tower and Spray Pond Symposium, under the auspices of the International Association for Hydraulic Research, took place at the von Karman Institute for Fluid Dynamics, Belgium, in September 1994. Technical topics discussed included cooling system design, performance, operation, environmental effects, modeling and components. Symposium proceedings will not be published. However, information of primary interest to staffs of power plants in the United States is summarized in this article.

Bartz, J.A.

1995-05-01T23:59:59.000Z

292

Predict particle collection in spray towers  

SciTech Connect

Spray tower wet scrubbers are used for control of particulates (as well as gaseous pollutants). The author has found that in cocurrent spray scrubbers, the most important parameter in determining particle collection efficiency is inlet dust particle size, followed by (in decreasing order of importance) gas velocity, collector droplet size, liquid-to-gas ratio, and length of scrubber. In countercurrent scrubbers, the most important parameters are collector droplet size, liquid-to-gas ratio, length of scrubber, and gas velocity. Note that some of these factors are directly related to collection, and some are related indirectly. This article provides equations, based on theoretical considerations and empirical data, for predicting particle collection efficiencies. The parameter ranges covered are typical of those encountered in the practical operation of conventional spray towers that use a ``cool`` (or cooled) inlet gas stream, so the equations are applicable to many industrial spray tower systems. The results are limited based on the ranges of the parameters evaluated, and while it may be possible to extrapolate beyond that, this has not been verified. (The initial model was for a flue-gas desulfurization system at a large power station that requires both particulate removal and SO{sub 2} absorption.)

Hesketh, H.E. [Southern Illinois Univ., Carbondale, IL (United States)

1995-10-01T23:59:59.000Z

293

SLIDESHOW: America's Wind Testing Facilities | Department of Energy  

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

SLIDESHOW: America's Wind Testing Facilities SLIDESHOW: America's Wind Testing Facilities SLIDESHOW: America's Wind Testing Facilities July 17, 2012 - 4:51pm Addthis National Wind Technology Center - Colorado 1 of 7 National Wind Technology Center - Colorado The first of 4 towers is lifted as work continues on the 2 MW Gamesa wind turbine being installed at NREL's National Wind Technology Center (NWTC). | Photo by Dennis Schroeder. Date taken: 2011-09-15 13:53 National Wind Technology Center - Colorado 2 of 7 National Wind Technology Center - Colorado Workers use a giant crane for lifting the blade assembly as work continues on the 2 MW Gamesa wind turbine being installed at NREL's National Wind Technology Center (NWTC). | Photo by Dennis Schroeder. Date taken: 2011-09-22 12:06 Wind Technology Testing Center - Boston

294

SLIDESHOW: America's Wind Testing Facilities | Department of Energy  

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

America's Wind Testing Facilities America's Wind Testing Facilities SLIDESHOW: America's Wind Testing Facilities July 17, 2012 - 4:51pm Addthis National Wind Technology Center - Colorado 1 of 7 National Wind Technology Center - Colorado The first of 4 towers is lifted as work continues on the 2 MW Gamesa wind turbine being installed at NREL's National Wind Technology Center (NWTC). | Photo by Dennis Schroeder. Date taken: 2011-09-15 13:53 National Wind Technology Center - Colorado 2 of 7 National Wind Technology Center - Colorado Workers use a giant crane for lifting the blade assembly as work continues on the 2 MW Gamesa wind turbine being installed at NREL's National Wind Technology Center (NWTC). | Photo by Dennis Schroeder. Date taken: 2011-09-22 12:06 Wind Technology Testing Center - Boston

295

Wind Turbine Safety and Function Test Report for the Gaia-Wind 11-kW Wind Turbine  

DOE Green Energy (OSTI)

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers to wind energy expansion by providing independent testing results for small wind turbines (SWT). In total, four turbines were tested at the National Wind Technology Center (NWTC) as a part of this project. Safety and function testing is one of up to five tests performed on the turbines, including power performance, duration, noise, and power-quality tests. The results of the testing provide the manufacturers with reports that can be used for small wind turbine certification. The test equipment includes a Gaia-Wind 11-kW wind turbine mounted on an 18-m monopole tower. Gaia-Wind Ltd. manufactured the turbine in Denmark. The system was installed by the NWTC site operations group with guidance and assistance from Gaia-Wind.

Huskey, A.; Bowen, A.; Jager, D.

2010-01-01T23:59:59.000Z

296

Wintertime Surface Wind Patterns in the Colorado River Valley  

Science Conference Proceedings (OSTI)

The diurnal variation of regional wind patterns in the complex terrain of the Grand Canyon area was investigated for wintertime fair weather days using a network of wind sensors on 10-m towers. Thermally driven along-slope and along-valley ...

C. David Whiteman; Xindi Bian; Joe L. Sutherland

1999-08-01T23:59:59.000Z

297

Establishing a Comprehensive Wind Energy Program  

SciTech Connect

This project was directed at establishing a comprehensive wind energy program in Indiana, including both educational and research components. A graduate/undergraduate course ME-514 - Fundamentals of Wind Energy has been established and offered and an interactive prediction of VAWT performance developed. Vertical axis wind turbines for education and research have been acquired, instrumented and installed on the roof top of a building on the Calumet campus and at West Lafayette (Kepner Lab). Computational Fluid Dynamics (CFD) calculations have been performed to simulate these urban wind environments. Also, modal dynamic testing of the West Lafayette VAWT has been performed and a novel horizontal axis design initiated. The 50-meter meteorological tower data obtained at the Purdue Beck Agricultural Research Center have been analyzed and the Purdue Reconfigurable Micro Wind Farm established and simulations directed at the investigation of wind farm configurations initiated. The virtual wind turbine and wind turbine farm simulation in the Visualization Lab has been initiated.

Fleeter, Sanford [Purdue University

2012-09-30T23:59:59.000Z

298

Wind resource characterization results to support the Sandia Wind Farm Feasibility Study : August 2008 through March 2009.  

DOE Green Energy (OSTI)

Sandia National Laboratories Wind Technology Department is investigating the feasibility of using local wind resources to meet the requirements of Executive Order 13423 and DOE Order 430.2B. These Orders, along with the DOE TEAM initiative, identify the use of on-site renewable energy projects to meet specified renewable energy goals over the next 3 to 5 years. A temporary 30-meter meteorological tower was used to perform interim monitoring while the National Environmental Policy Act (NEPA) process for the larger Wind Feasibility Project ensued. This report presents the analysis of the data collected from the 30-meter meteorological tower.

Deola, Regina Anne

2010-01-01T23:59:59.000Z

299

Order-of-magnitude enhancement of wind farm power density via counter-rotating vertical-axis wind turbine arrays  

E-Print Network (OSTI)

Modern wind farms require significant land resources to separate each wind turbine from the adjacent turbine wakes. These aerodynamic constraints limit the amount of power that can be extracted from a given wind farm footprint. We conducted full-scale field tests of vertical-axis wind turbines in counter-rotating configurations under natural wind conditions. Whereas wind farms consisting of propeller-style turbines produce 2 to 3 watts of power per square meter of land area, these field tests indicate that power densities approaching 100 W m^-2 can be achieved by arranging vertical-axis wind turbines in layouts that enable them to extract energy from adjacent wakes. In addition, we calculated that the global wind resource available to 10-m tall turbines based on the present approach is approximately 225 trillion watts (TW), which significantly exceeds the global wind resource available to 80-m tall, propeller-style wind turbines, approximately 75 TW. This improvement is due to the closer spacing that can be a...

Dabiri, John O

2010-01-01T23:59:59.000Z

300

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

Note: This page contains sample records for the topic "tall tower wind" 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

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 that use both sensible heat transfer and mass transfer to cool. The heat and mass transfer process for a crossflow cooling tower has been modeled on an Apple II microcomputer. Various heat loads or weather conditions can be imposed on a given tower to evaluate its response; moreover, a subprogram can evaluate pressure drop and motor/fan characteristics. Determination of the energy required to operate the tower enables its performance to be compared against energy-saving operations such as variable speed drive or changes in fill height or type.

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

1984-01-01T23:59:59.000Z

302

Design specifications for the development of the initial validation software (Version 3.0) for processing of NWTC 80-Meter meteorological tower data  

DOE Green Energy (OSTI)

This document describes the design, implementation, and testing of the Initial Validation Software (IVS) for meteorological tower data at the National Renewable Energy Laboratory/National Wind Technology Center. The document outlines all design issues relating to the IVS, including the design process, an outline of the software and testing procedures, and an evaluation of design results after further iterations of the design process.

Johnson, W.; Kelley, N.

2000-02-28T23:59:59.000Z

303

Nocturnal Wind Direction Shear and Its Potential Impact on Pollutant Transport  

Science Conference Proceedings (OSTI)

The potential effects of vertical wind direction shear on pollutant transport at a complicated, semiarid site are examined using tower measurements. This high-elevation site is situated on a sloping plateau between mountains to the west and a ...

Brent M. Bowen; Jeffrey A. Baars; Gregory L. Stone

2000-03-01T23:59:59.000Z

304

An h-Adaptive Finite-Element Technique for Constructing 3D Wind Fields  

Science Conference Proceedings (OSTI)

An h-adaptive, mass-consistent finite-element model (FEM) has been developed for constructing 3D wind fields over irregular terrain utilizing sparse meteorological tower data. The element size in the computational domain is dynamically controlled ...

Darrell W. Pepper; Xiuling Wang

2009-03-01T23:59:59.000Z

305

Wind Energy Opportunities, Challenges, and Progress Within the Federal Government (Poster)  

DOE Green Energy (OSTI)

Wind Powering America (WPA) works with Federal agencies to increase their understanding of wind resources and assessment; facilitate project development activities through Met tower loans, wind data analysis, and technical assistance; and provide advice on RFP development and financing options. This poster provides an overview of WPA's activities with the federal sector.

Robichaud, R.

2009-05-01T23:59:59.000Z

306

Competitive Landscape of Mobile Telecommunications Tower Companies in India  

Science Conference Proceedings (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

307

Solar power tower development: Recent experiences  

DOE Green Energy (OSTI)

Recent experiences with the 10 MW{sub e} Solar Two and the 2.5 MW{sub t} TSA (Technology Program Solar Air Receiver) demonstration plants are reported. The heat transfer fluids used in these solar power towers are molten-nitrate salt and atmospheric air, respectively. Lessons learned and suggested technology improvements for next-generation plants are categorized according to subsystem. The next steps to be taken in the commercialization process for each these new power plant technologies is also presented.

Tyner, C.; Kolb, G.; Prairie, M. [and others

1996-12-01T23:59:59.000Z

308

H-FACET: Alignment Tool for Power Tower Heliostats  

H-FACET: Alignment Tool for Power Tower Heliostats ... for the U.S. Department of Energy’s National Nuclear Security Administration. SAND # 2011-4640P

309

Application of upspray type water distribution systems in cooling towers  

SciTech Connect

The efficient and uniform distribution of the warm circulating water on to the filling of cooling towers has been the continuing goal of the tower designer. The final element in the water distribution system, the sprayer, plays an important role in achieving this objective. This paper discusses the performance and operational characteristics of a sprayer utilized in counterflow towers that directs the water leaving the sprayer nozzle in an upward direction and briefly compares its performance with that of downward sprayers. The discussion also covers relative tower economics and application data of the sprayer.

Fay, H.P.; Hesse, G.

1985-01-01T23:59:59.000Z

310

Spray tower: the workhorse of flue-gas desulfurization  

Science Conference Proceedings (OSTI)

A recently developed spray tower system for use in a utility flue gas desulfurization system is simple, durable, and capable of achieving very high sulfur dioxide removal efficiencies, possibly approaching 100%. The principles behind the design and operation of the spray tower are discussed. The quality of water used for washing, tower size limitations, construction materials liquid distribution, gas-inlet design, gas distribution, mass transfer, and operating characteristics are examined. Procedures to maintain the reliability and high performance of the spray tower are described. (5 diagrams, 5 photos, 12 references, 1 table)

Saleem, A.

1980-10-01T23:59:59.000Z

311

Performance evaluation of natural draught cooling towers with anisotropic fills.  

E-Print Network (OSTI)

??ENGLISH ABSTRACT: In the design of a modern natural draught wet-cooling tower (NDWCT), structural and performance characteristics must be considered. Air flow distortions and resistances… (more)

Reuter, Hanno Carl Rudolf

2010-01-01T23:59:59.000Z

312

Evaluation and performance enhancement of cooling tower spray zones.  

E-Print Network (OSTI)

??ENGLISH ABSTRACT: The performance of wet cooling towers can be improved by installing spray nozzles that distribute the cooling water uniformly onto the fill whilst… (more)

Roux, Daniel

2012-01-01T23:59:59.000Z

313

Evaluation and performance prediction of cooling tower spray zones.  

E-Print Network (OSTI)

??Cooling tower spray nozzle performance characteristics such as the water distribution onto the fill material, air side pressure drop, pump head, drop size distribution and… (more)

Viljoen, D. J.

2006-01-01T23:59:59.000Z

314

Evaluation and performance prediction of cooling tower rain zones.  

E-Print Network (OSTI)

??Cooling tower rain zone performance characteristics such as the loss coefficient and the Merkel number are evaluated and simulated. To this end the influence of… (more)

Pierce, Darren John

2007-01-01T23:59:59.000Z

315

California Code of Regulations, Title 8, Section 1646. Tower...  

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

Subchapter 4. Construction Safety Orders Article 22. Scaffolds--Various Types New query 1646. Tower Scaffolds and Rolling Scaffolds, Wood or Metal. (a) The minimum...

316

Comparative evaluation of cooling tower drift eliminator performance  

E-Print Network (OSTI)

The performance of standard industrial evaporative cooling tower drift eliminators is analyzed using experiments and numerical simulations. The experiments measure the

Chan, Joseph Kwok-Kwong

317

The Damaging Effects of Earthquake Excitation on Concrete Cooling Towers  

SciTech Connect

Reinforced concrete cooling towers of hyperbolic shell configuration find widespread application in utilities engaged in the production of electric power. In design of critical civil infrastructure of this type, it is imperative to consider all the possible loading conditions that the cooling tower may experience, an important loading condition in many countries is that of the earthquake excitation, whose influence on the integrity and stability of cooling towers is profound. Previous researches have shown that the columns supporting a cooling tower are sensitive to earthquake forces, as they are heavily loaded elements that do not possess high ductility, and understanding the behavior of columns under earthquake excitation is vital in structural design because they provide the load path for the self weight of the tower shell. This paper presents the results of a finite element investigation of a representative 'dry' cooling tower, using realistic horizontal and vertical acceleration data obtained from the recent and widely-reported Tabas, Naghan and Bam earthquakes in Iran. The results of both linear and nonlinear analyses are reported in the paper, the locations of plastic hinges within the supporting columns are identified and the ramifications of the plastic hinges on the stability of the cooling tower are assessed. It is concluded that for the (typical) cooling tower configuration analyzed, the columns that are instrumental in providing a load path are influenced greatly by earthquake loading, and for the earthquake data used in this study the representative cooling tower would be rendered unstable and would collapse under the earthquake forces considered.

Abedi-Nik, Farhad [SADRA Institute of Higher Education, Tehran (Iran, Islamic Republic of); Sabouri-Ghomi, Saeid [K.N.T University of Technology, Tehran (Iran, Islamic Republic of)

2008-07-08T23:59:59.000Z

318

NREL: Sustainable NREL - South Entrance Building  

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

entrance. Energy Efficiency Features Daylighting Natural ventilation, including a 35-foot tall wind-catch tower and under-floor air distribution system Roof-mounted PV (15.8 kW)...

319

Fluid---structure interaction modeling of wind turbines: simulating the full machine  

Science Conference Proceedings (OSTI)

In this paper we present our aerodynamics and fluid---structure interaction (FSI) computational techniques that enable dynamic, fully coupled, 3D FSI simulation of wind turbines at full scale, and in the presence of the nacelle and tower (i.e., simulation ... Keywords: ALE-VMS method, Fluid---structure interaction, Full machine, NREL 5 MW offshore, Rotor---tower interaction, Sliding-interface formulation, Wind turbine aerodynamics

Ming-Chen Hsu; Yuri Bazilevs

2012-12-01T23:59:59.000Z

320

Real-time Eulerian water simulation using a restricted tall cell grid  

Science Conference Proceedings (OSTI)

We present a new Eulerian fluid simulation method, which allows real-time simulations of large scale three dimensional liquids. Such scenarios have hitherto been restricted to the domain of off-line computation. To reduce computation time we use a hybrid ... Keywords: fluid simulation, multigrid, real time, tall cell grid

Nuttapong Chentanez; Matthias Müller

2011-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "tall tower wind" 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

Numerical Simulation of Flow around a Tall Isolated Seamount. Part I: Problem Formulation and Model Accuracy  

Science Conference Proceedings (OSTI)

A sigma coordinate ocean circulation model is employed to study flow trapped to a tall seamount in a periodic f-plane channel. In Part I, errors arising from the pressure gradient formulation in the steep topography/strong stratification limit ...

Aike Beckmann; Dale B. Haidvogel

1993-08-01T23:59:59.000Z

322

United States areal wind resource assessment  

SciTech Connect

Estimates of the electricity that could potentially be generated by wind power and of the land area available for wind energy development have been calculated for the contiguous United States, in support of the US Department of Energy`s National Energy Strategy. These estimates were based on the wind resource data published in a national resource atlas. Estimates of the wind resource in this atlas are expressed in wind power classes ranging from class 1 to class 7, with each class representing a range of mean wind power density or equivalent mean speed at specified heights above the ground (Table 1) . Areas designatedclass 4 or greater are suitable for most wind turbine applications. Power class 3 areas are suitable for wind energy development using tall (50-m hub height) turbines. Class 2 areas are marginal and class 1 areas unsuitable for wind energy development. A map of the areal (percentage of land area) distribution of the wind resource digitized in grid cells (1/4{degrees} latitude by 1/3{degrees} longitude) shows that exposed areas with moderate to high wind resource (class 3 and greater) are dispersed throughout much of the contiguous United States.

Schwartz, M.N.; Elliott, D.L.

1993-03-01T23:59:59.000Z

323

United States areal wind resource assessment  

SciTech Connect

Estimates of the electricity that could potentially be generated by wind power and of the land area available for wind energy development have been calculated for the contiguous United States, in support of the US Department of Energy's National Energy Strategy. These estimates were based on the wind resource data published in a national resource atlas. Estimates of the wind resource in this atlas are expressed in wind power classes ranging from class 1 to class 7, with each class representing a range of mean wind power density or equivalent mean speed at specified heights above the ground (Table 1) . Areas designatedclass 4 or greater are suitable for most wind turbine applications. Power class 3 areas are suitable for wind energy development using tall (50-m hub height) turbines. Class 2 areas are marginal and class 1 areas unsuitable for wind energy development. A map of the areal (percentage of land area) distribution of the wind resource digitized in grid cells (1/4[degrees] latitude by 1/3[degrees] longitude) shows that exposed areas with moderate to high wind resource (class 3 and greater) are dispersed throughout much of the contiguous United States.

Schwartz, M.N.; Elliott, D.L.

1993-03-01T23:59:59.000Z

324

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-drive eliminates these items from the drive train and puts the same electric motor HP at ground level close coupled to a hydraulic pump, filters, and oil reservoir. Hydraulic lines bring oil pressure to the hydraulic motor, which is more than 75% less weight than comparable gear boxes and presents a smooth practically trouble free performance. In this three cell installation, the original 75 horsepower motors and 18’ diameter fans were cooling a total of 14,000 GPM which were CTI tested and 74.7% of capability. The upgrading and retrofit consisted of installing at ground level 100 horse power motors, 22’ diameter fans, 14’ high velocity recovery fan cylinders, “V” PVC splash bars, and high efficiency cellular drift eliminators. Testing after completion indicated a 92% tower now circulating 21,000 GPM instead of the original 14,000.

Dickerson, J. A.

1987-09-01T23:59:59.000Z

325

A systems approach to conceptual design solutions for a very tall building in Hong Kong  

E-Print Network (OSTI)

The thesis represents a design investigation that seeks to reconsider the high-rise building. With changing uses and technologies, high-rise office towers may have become obsolete. Given the recent capabilities for ...

Ungerer, Frank Wolfgang, 1969-

1998-01-01T23:59:59.000Z

326

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

327

Wind Generation on Winnebago Tribal Lands  

DOE Green Energy (OSTI)

The Winnebago Wind Energy Study evaluated facility-scale, community-scale and commercial-scale wind development on Winnebago Tribal lands in northeastern Nebraska. The Winnebago Tribe of Nebraska has been pursuing wind development in various forms for nearly ten years. Wind monitoring utilizing loaned met towers from NREL took place during two different periods. From April 2001 to April 2002, a 20-meter met tower monitored wind data at the WinnaVegas Casino on the far eastern edge of the Winnebago reservation in Iowa. In late 2006, a 50-meter tower was installed, and subsequently monitored wind data at the WinnaVegas site from late 2006 through late 2008. Significant challenges with the NREL wind monitoring equipment limited the availability of valid data, but based on the available data, average wind speeds between 13.6 – 14.3 miles were indicated, reflecting a 2+/3- wind class. Based on the anticipated cost of energy produced by a WinnaVegas wind turbine, and the utility policies and rates in place at this time, a WinnaVegas wind project did not appear to make economic sense. However, if substantial grant funding were available for energy equipment at the casino site, and if either Woodbury REC backup rates were lower, or NIPCO was willing to pay more for wind power, a WinnaVegas wind project could be feasible. With funding remaining in the DOE-funded project budget,a number of other possible wind project locations on the Winnebago reservation were considered. in early 2009, a NPPD-owned met tower was installed at a site identified in the study pursuant to a verbal agreement with NPPD which provided for power from any ultimately developed project on the Western Winnebago site to be sold to NPPD. Results from the first seven months of wind monitoring at the Western Winnebago site were as expected at just over 7 meters per second at 50-meter tower height, reflecting Class 4 wind speeds, adequate for commercial development. If wind data collected in the remaining months of the twelve-month collection period is consistent with that collected in the first seven months, the Western Winnebago site may present an interesting opportunity for Winnebago. Given the distance to nearby substations, and high cost of interconnection at higher voltage transmission lines, Winnebago would likely need to be part of a larger project in order to reduce power costs to more attractive levels. Another alternative would be to pursue grant funding for a portion of development or equipment costs, which would also help reduce the cost of power produced. The NREL tower from the WinnaVegas site was taken down in late 2008, re-instrumented and installation attempted on the Thunderway site south of the Winnebago community. Based on projected wind speeds, current equipment costs, and the project’s proximity to substations for possible interconnection, a Thunderway community-scale wind project could also be feasible.

Multiple

2009-09-30T23:59:59.000Z

328

Refrigerant Phase-Change Stirling-Cycle Solar Power Towers  

Science Conference Proceedings (OSTI)

This paper firstly introduces the principles of Refrigerant Phase-Change Stirling-Cycle solar power towers This heat engines use solar reservoire. When the refrigerant in an engine cylinder absorbs heat from high-temperature heat sources, refrigerant ... Keywords: refrigerant phase-change cycle, heat engines, solar power tower, finite-time thermodynamics

Dezhong Huang

2011-01-01T23:59:59.000Z

329

The cyclic multi-peg Tower of Hanoi  

Science Conference Proceedings (OSTI)

Variants of the classical Tower of Hanoi problem evolved in various directions. Allowing more than 3 pegs, and imposing limitations on the possible moves among the pegs, are two of these. Here, we deal with the case of h?3 pegs arranged on ... Keywords: Multi-peg tower of Hanoi

Daniel Berend; Amir Sapir

2006-07-01T23:59:59.000Z

330

2009 EPRI Cooling Tower Technology Seminar and Symposium  

Science Conference Proceedings (OSTI)

Cooling towers and associated systems cause significant loss of availability and heat rate degradation in both nuclear and fossil-fired power plants. Twenty-five papers presented at a 2009 conference in Cincinnati, Ohio discussed industrial experience and provided case histories of cooling tower problems and solutions.

2009-10-05T23:59:59.000Z

331

Experiment Study on Tower Cooling Energy-Saving Technology  

Science Conference Proceedings (OSTI)

During the transition season periods the technology of tower cooling is used to cool the internal heat source region in the buildings, which is energy saving and environment friendly technology. To aim at climatic conditions of the transition season ... Keywords: towers cooling, experiments, fluence factors, energy saving

Ji Amin; He Li; Yue Zhiqiang; Jie Li; Gang Yin; Zhang Qinggang

2011-02-01T23:59:59.000Z

332

Best Practices for Energy Efficient Cleanrooms: Cooling Tower and Condenser Water Optimization  

E-Print Network (OSTI)

LBNL-58634 Best Practices for Energy Efficient Cleanrooms: Cooling Tower and Condenser Water Efficient Cleanrooms: Cooling tower and condenser water optimization Tengfang Xu Contents HVAC WATER SYSTEMS.............................................................................................. 2 Cooling tower and condenser water optimization

333

Characterizing Inflow Conditions Across the Rotor Disk of a Utility-Scale Wind Turbine (Poster)  

DOE Green Energy (OSTI)

Multi-megawatt utility-scale wind turbines operate in a turbulent, thermally-driven atmosphere where wind speed and air temperature vary with height. Turbines convert the wind's momentum into electrical power, and so changes in the atmosphere across the rotor disk influence the power produced by the turbine. To characterize the inflow into utility scale turbines at the National Wind Technology Center (NWTC) near Boulder, Colorado, NREL recently built two 135-meter inflow monitoring towers. This poster introduces the towers and the measurements that are made, showing some of the data obtained in the first few months of operation in 2011.

Clifton, A.; Lundquist, J. K.; Kelley, N.; Scott, G.; Jager, D.; Schreck, S.

2012-01-01T23:59:59.000Z

334

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

Science Conference Proceedings (OSTI)

HEATS Project: Abengoa Solar is developing a high-efficiency solar-electric conversion tower to enable low-cost, fully dispatchable solar energy generation. Abengoa’s 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

335

Tower reactors for bioconversion of lignocellulosic material  

DOE Patents (OSTI)

An apparatus is described for enzymatic hydrolysis and fermentation of pretreated lignocellulosic material, in the form of a tower bioreactor, having mixers to achieve intermittent mixing of the material. Precise mixing of the material is important for effective heat and mass transfer requirements without damaging or denaturing the enzymes or fermenting microorganisms. The pretreated material, generally in the form of a slurry, is pumped through the bioreactor, either upwards or downwards, and is mixed periodically as it passes through the mixing zones where the mixers are located. For a thin slurry, alternate mixing can be achieved by a pumping loop which also serves as a heat transfer device. Additional heat transfer takes place through the reactor heat transfer jackets. 5 figs.

Nguyen, Q.A.

1999-03-30T23:59:59.000Z

336

Tower reactors for bioconversion of lignocellulosic material  

DOE Patents (OSTI)

An apparatus is disclosed for enzymatic hydrolysis and fermentation of pretreated lignocellulosic material. The apparatus consists of a tower bioreactor which has mixers to achieve intermittent mixing of the material. Precise mixing of the material is important for effective heat and mass transfer requirements without damaging or denaturing the enzymes or fermenting microorganisms. The pretreated material, generally in the form of a slurry, is pumped through the bioreactor, either upwards or downwards, and is mixed periodically as it passes through the mixing zones where the mixers are located. For a thin slurry, alternate mixing can be achieved by a pumping loop which also serves as a heat transfer device. Additional heat transfer takes place through the reactor heat transfer jackets. 5 figs.

Nguyen, Q.A.

1998-03-31T23:59:59.000Z

337

Tower reactors for bioconversion of lignocellulosic material  

DOE Patents (OSTI)

An apparatus for enzymatic hydrolysis and fermentation of pretreated lignocellulosic material, in the form of a tower bioreactor, having mixers to achieve intermittent mixing of the material. Precise mixing of the material is important for effective heat and mass transfer requirements without damaging or denaturing the enzymes or fermenting microorganisms. The pretreated material, generally in the form of a slurry, is pumped through the bioreactor, either upwards of downwards, and is mixed periodically as it passes through the mixing zones where the mixers are located. For a thin slurry, alternate mixing can be achieved by a pumping loop which also serves as a heat transfer device. Additional heat transfer takes place through the reactor heat transfer jackets.

Nguyen, Quang A. (16458 W. 1st Ave., Golden, CO 80401)

1998-01-01T23:59:59.000Z

338

Tower reactors for bioconversion of lignocellulosic material  

DOE Patents (OSTI)

An apparatus for enzymatic hydrolysis and fermentation of pretreated lignocellulosic material, in the form of a tower bioreactor, having mixers to achieve intermittent mixing of the material. Precise mixing of the material is important for effective heat and mass transfer requirements without damaging or denaturing the enzymes or fermenting microorganisms. The pretreated material, generally in the form of a slurry, is pumped through the bioreactor, either upwards or downwards, and is mixed periodically as it passes through the mixing zones where the mixers are located. For a thin slurry, alternate mixing can be achieved by a pumping loop which also serves as a heat transfer device. Additional heat transfer takes place through the reactor heat transfer jackets.

Nguyen, Quang A. (16458 W. 1st Ave., Golden, CO 80401)

1999-01-01T23:59:59.000Z

339

Property:CoolingTowerWaterUseWinterConsumed | Open Energy Information  

Open Energy Info (EERE)

search Property Name CoolingTowerWaterUseWinterConsumed Property Type Number Description Cooling Tower Water use (winter average) (afday) Consumed. Retrieved from "http:...

340

Property:CoolingTowerWaterUseSummerConsumed | Open Energy Information  

Open Energy Info (EERE)

Name CoolingTowerWaterUseSummerConsumed Property Type Number Description Cooling Tower Water use (summer average) (afday) Consumed. Retrieved from "http:en.openei.orgw...

Note: This page contains sample records for the topic "tall tower wind" 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

Property:CoolingTowerWaterUseAnnlAvgConsumed | Open Energy Information  

Open Energy Info (EERE)

Name CoolingTowerWaterUseAnnlAvgConsumed Property Type Number Description Cooling Tower Water use (annual average) (afday) Consumed. Retrieved from "http:en.openei.orgw...

342

Property:CoolingTowerWaterUseSummerGross | Open Energy Information  

Open Energy Info (EERE)

Property Name CoolingTowerWaterUseSummerGross Property Type Number Description Cooling Tower Water use (summer average) (afday) Gross. Retrieved from "http:en.openei.orgw...

343

Performance evaluation of wet-cooling tower fills with computational fluid dynamics.  

E-Print Network (OSTI)

??ENGLISH ABSTRACT: A wet-cooling tower fill performance evaluation model developed by Reuter is derived in Cartesian coordinates for a rectangular cooling tower and compared to… (more)

Gudmundsson, Yngvi

2012-01-01T23:59:59.000Z

344

Purification of water from cooling towers and other heat exchange systems  

SciTech Connect

The amount of silica in cooling tower water is reduced by passing cooling tower water through a column of silica gel.

Sullivan; Enid J. (Los Alamos, NM), Carlson; Bryan J. (Ojo Caliente, NM), Wingo; Robert M. (Los Alamos, NM), Robison; Thomas W. (Stilwell, KS)

2012-08-07T23:59:59.000Z

345

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

346

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 to wood decay which sooner or later will occur without preservative protection. Preventing or minimizing the destructive effect of internal wood decay of the framework also avoids unexpected down time due to emergency maintenance or unexpected collapse of the main supporting framework.

Reidenback, R.

1991-06-01T23:59:59.000Z

347

Aerodynamic interference between two Darrieus wind turbines  

DOE Green Energy (OSTI)

The effect of aerodynamic interference on the performance of two curved bladed Darrieus-type vertical axis wind turbines has been calculated using a vortex/lifting line aerodynamic model. The turbines have a tower-to-tower separation distance of 1.5 turbine diameters, with the line of turbine centers varying with respect to the ambient wind direction. The effects of freestream turbulence were neglected. For the cases examined, the calculations showed that the downwind turbine power decrement (1) was significant only when the line of turbine centers was coincident with the ambient wind direction, (2) increased with increasing tipspeed ratio, and (3) is due more to induced flow angularities downstream than to speed deficits near the downstream turbine.

Schatzle, P.R.; Klimas, P.C.; Spahr, H.R.

1981-04-01T23:59:59.000Z

348

MARIAH-A Similarity-Based Method for Determining Wind, Temperature, and Humidity Profile Structure in the Atmospheric Surface Layer  

Science Conference Proceedings (OSTI)

Methodology for determining the similarity scaling constants for wind, temperature, and specific humidity from micrometeorological tower data is presented. The equations and the approach for solving them are referred to as MARIAH. The MARIAH ...

Henry Rachele; Arnold Tunick; Frank V. Hansen

1995-04-01T23:59:59.000Z

349

Field verification program for small wind turbines, Block Island, Rhode Island. Quarterly report for the period October to December 1999  

SciTech Connect

The proposal is to install and monitor five 10-kW residential wind turbines on 25-meter towers on Block Island, which has excellent wind resources and high electricity costs. The harsh environment will provide an opportunity for accelerated reliability testing of an enhanced wind turbine and other equipment.

Henry G. duPont

2000-01-01T23:59:59.000Z

350

66 IEEE TRANSACTIONS ON SUSTAINABLE ENERGY, VOL. 1, NO. 2, JULY 2010 Optimization of Wind Turbine Performance With  

E-Print Network (OSTI)

66 IEEE TRANSACTIONS ON SUSTAINABLE ENERGY, VOL. 1, NO. 2, JULY 2010 Optimization of Wind Turbine, torque, tower acceleration, wind turbine vibrations. I. INTRODUCTION I NTEREST in renewable energy has to carbon taxation has become a catalyst in the quest for clean energy. Wind energy has been most

Kusiak, Andrew

351

Experimental Investigation of the Padding Tower for Air Dehumidifier  

E-Print Network (OSTI)

Air conditioning with all fresh air is founded on the principle of dehumidifying by liquid desiccant. It has the characteristics of being clean, power-saving, easy to operate, and requiring low-grade heat. It is suitable for applying waste heat, and solar power as the heat source for regeneration. Hence, this system has a great latent potential for energy savings and environmental protection. The system chooses the padding tower as a dehumidifier and regenerator, which are often used in petrochemical industry. The system chooses a padding tower as a dehumidifier, and LiCl-Water as a liquid desiccant. The vapor in the air is absorbed by the spray of the LiCl solution, and then the absorbed vapor will be released by heating the absorbent. These processes form the circle of absorptive refrigeration operating in atmospheric pressure. This paper describes studies on the theory and experiment of the padding tower of the dehumidifying air conditioning, including selecting different padding and measuring the speed of the air flow and the solution flow and the pressure drop between the layers of the padding. The experimental and computational results indicate that the design parameters of the padding tower significantly influence the characteristics of the liquid desiccant air conditioning. Of these design parameters, the framework of the padding tower, ratio of the air and the concentration of the inlet solution is largest through the tower, the temperature and effects of the dehumidifying capability of the tower.

Wang, J.; Liu, J.; Li, C.; Zhang, G.; An, S.

2006-01-01T23:59:59.000Z

352

Power Tower Technology Roadmap and cost reduction plan.  

DOE Green Energy (OSTI)

Concentrating solar power (CSP) technologies continue to mature and are being deployed worldwide. Power towers will likely play an essential role in the future development of CSP due to their potential to provide dispatchable solar electricity at a low cost. This Power Tower Technology Roadmap has been developed by the U.S. Department of Energy (DOE) to describe the current technology, the improvement opportunities that exist for the technology, and the specific activities needed to reach the DOE programmatic target of providing competitively-priced electricity in the intermediate and baseload power markets by 2020. As a first step in developing this roadmap, a Power Tower Roadmap Workshop that included the tower industry, national laboratories, and DOE was held in March 2010. A number of technology improvement opportunities (TIOs) were identified at this workshop and separated into four categories associated with power tower subsystems: solar collector field, solar receiver, thermal energy storage, and power block/balance of plant. In this roadmap, the TIOs associated with power tower technologies are identified along with their respective impacts on the cost of delivered electricity. In addition, development timelines and estimated budgets to achieve cost reduction goals are presented. The roadmap does not present a single path for achieving these goals, but rather provides a process for evaluating a set of options from which DOE and industry can select to accelerate power tower R&D, cost reductions, and commercial deployment.

Mancini, Thomas R.; Gary, Jesse A. (U.S. Department of Energy); Kolb, Gregory J.; Ho, Clifford Kuofei

2011-04-01T23:59:59.000Z

353

Real-time wind turbine emulator suitable for power quality and dynamic control studies, MASc Thesis  

E-Print Network (OSTI)

Abstract — Wind turbines are increasingly becoming significant components of power systems. To evaluate competing wind energy conversion technologies, a real-time Wind Turbine Emulator, which emulates the dynamic torque produced by an actual turbine has been developed. This is necessary since the real world performance of a wind turbine, subjected to variable wind conditions is more difficult to evaluate than a standard turbine generator system operating in near steady state. This emulator is capable of reproducing both the static and dynamic torque of an actual wind turbine. It models the torque oscillations caused by wind shear, tower shadow, and the obvious pulsations caused by variable wind speed. Also included are the dynamic effects of a large turbine inertia. This emulator will allow testing without the costly construction of the actual turbine blades and tower to determine the strengths and weaknesses of competing energy conversion and control technologies.

Dale S. L. Dolan; Student Member; P. W. Lehn; Member Ieee

2005-01-01T23:59:59.000Z

354

Turbulent Transfer Coefficients and Calculation of Air Temperature inside Tall Grass Canopies in Land–Atmosphere Schemes for Environmental Modeling  

Science Conference Proceedings (OSTI)

A method for estimating profiles of turbulent transfer coefficients inside a vegetation canopy and their use in calculating the air temperature inside tall grass canopies in land surface schemes for environmental modeling is presented. The ...

D. T. Mihailovic; K. Alapaty; B. Lalic; I. Arsenic; B. Rajkovic; S. Malinovic

2004-10-01T23:59:59.000Z

355

Meteorological Patterns Associated with Maximum 3-Hour Average Concentrations Predicted by the CRSTER Model for a Tall Stack Source  

Science Conference Proceedings (OSTI)

Regional meteorological patterns associated with maximum 3-hour average concentrations predicted by the U.S. EPA CRSTER model for emissions from a tall stack were examined for a limited sample. Causes of predicted peaks were the movements of weak ...

Paul N. Derezotes

1984-11-01T23:59:59.000Z

356

A contribution to urbanism--the tall building as a multi-dimensional framework for additive growth and change  

E-Print Network (OSTI)

Skyscrapers do not destroy cities; they make them look different and they make the urban space more crowded, but they have not yet put an end to the urban environment. Many of the problems with the early tall buildings ...

Nelson, David J. (David Jeffrey)

1987-01-01T23:59:59.000Z

357

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

358

Use of nanofiltration to reduce cooling tower water consumption.  

Science Conference Proceedings (OSTI)

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%.

Altman, Susan Jeanne; Ciferno, Jared

2010-10-01T23:59:59.000Z

359

Orange County - Wind Permitting Standards | Department of Energy  

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

Orange County - Wind Permitting Standards Orange County - Wind Permitting Standards Orange County - Wind Permitting Standards < Back Eligibility Agricultural Commercial Residential Savings Category Wind Buying & Making Electricity Program Info State California Program Type Solar/Wind Permitting Standards Provider OC Planning In December 2010, the County of Orange Board of Supervisors adopted small wind performance and development standards (Ord. No. 10-020) in order to promote distributed generation systems in non-urbanized areas (as defined in Government Code Section 65944(d)(2)) within the unincorporated territory. Permitting standards are for systems of 50 kW or less per customer site, for which the energy is primarily for on-site consumption. Height: For systems 45 feet tall or less, a use permit must be approved by

360

CS Wind Tech Co Ltd | Open Energy Information  

Open Energy Info (EERE)

CS Wind Tech Co Ltd CS Wind Tech Co Ltd Jump to: navigation, search Name CS Wind Tech Co Ltd Place Lianyungang, China Zip 222049 Sector Wind energy Product China-based wind turbine tower maker, a subsidiary of Korea's CS Corporation. References CS Wind Tech Co Ltd[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. CS Wind Tech Co Ltd is a company located in Lianyungang, China . References ↑ "CS Wind Tech Co Ltd" Retrieved from "http://en.openei.org/w/index.php?title=CS_Wind_Tech_Co_Ltd&oldid=343989" Categories: Clean Energy Organizations Companies Organizations Stubs What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load)

Note: This page contains sample records for the topic "tall tower wind" 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

National Wind Technology Center (Fact Sheet)  

SciTech Connect

This overview fact sheet is one in a series of information fact sheets for the National Wind Technology Center (NWTC). Wind energy is one of the fastest growing electricity generation sources in the world. NREL's National Wind Technology Center (NWTC), the nation's premier wind energy technology research facility, fosters innovative wind energy technologies in land-based and offshore wind through its research and testing facilities and extends these capabilities to marine hydrokinetic water power. Research and testing conducted at the NWTC offers specialized facilities and personnel and provides technical support critical to the development of advanced wind energy systems. From the base of a system's tower to the tips of its blades, NREL researchers work side-by-side with wind industry partners to increase system reliability and reduce wind energy costs. The NWTC's centrally located research and test facilities at the foot of the Colorado Rockies experience diverse and robust wind patterns ideal for testing. The NWTC tests wind turbine components, complete wind energy systems and prototypes from 400 watts to multiple megawatts in power rating.

2011-12-01T23:59:59.000Z

362

National Wind Technology Center (Fact Sheet)  

DOE Green Energy (OSTI)

This overview fact sheet is one in a series of information fact sheets for the National Wind Technology Center (NWTC). Wind energy is one of the fastest growing electricity generation sources in the world. NREL's National Wind Technology Center (NWTC), the nation's premier wind energy technology research facility, fosters innovative wind energy technologies in land-based and offshore wind through its research and testing facilities and extends these capabilities to marine hydrokinetic water power. Research and testing conducted at the NWTC offers specialized facilities and personnel and provides technical support critical to the development of advanced wind energy systems. From the base of a system's tower to the tips of its blades, NREL researchers work side-by-side with wind industry partners to increase system reliability and reduce wind energy costs. The NWTC's centrally located research and test facilities at the foot of the Colorado Rockies experience diverse and robust wind patterns ideal for testing. The NWTC tests wind turbine components, complete wind energy systems and prototypes from 400 watts to multiple megawatts in power rating.

Not Available

2011-12-01T23:59:59.000Z

363

The Tower Shielding Facility: Its glorious past  

Science Conference Proceedings (OSTI)

The Tower Shielding Facility (TSF) is the only reactor facility in the US that was designed and built for radiation-shielding studies in which both the reactor source and shield samples could be raised into the air to allow measurements to be made without interference from ground scattering or other spurious effects. The TSF proved its usefulness as many different programs were successfully completed. It became active in work for the Defense Atomic Support Agency (DASA) Space Nuclear Auxiliary Power, Defense Nuclear Agency, Liquid Metal Fast Breeder Reactor Program, the Gas-Cooled and High-Temperature Gas-Cooled Reactor programs, and the Japanese-American Shielding Program of Experimental Research, just to mention a few of the more extensive ones. The history of the TSF as presented in this report describes the various experiments that were performed using the different reactors. The experiments are categorized as to the programs which they supported and placed in corresponding chapters. The experiments are described in modest detail, along with their purpose when appropriate. Discussion of the results is minimal, but references are given to more extensive topical reports.

Muckenthaler, F.J.

1997-05-07T23:59:59.000Z

364

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 Speaker(s): Charlie Huizenga Date: June 15, 2012 - 12:00pm Location: 90-3122 Seminar HostPoint of Contact: Dragan...

365

Offshore Tower Shading Effects on In-Water Optical Measurements  

Science Conference Proceedings (OSTI)

A field campaign was performed to estimate the shading effect induced on in-water irradiance and radiance measurements taken in the immediate vicinity of the Acqua Alta Oceanographic Tower (AAOT), located in the northern Adriatic Sea, which is ...

Giuseppe Zibordi; John Piero Doyle; Stanford B. Hooker

1999-11-01T23:59:59.000Z

366

User's Manual: Cooling-Tower-Plume Prediction Code  

Science Conference Proceedings (OSTI)

Utilities planning to build generating plants that use evaporative cooling are required to estimate potential seasonal and annual environmental effects of cooling-tower plumes. An easy-to-use computerized method is now available for making such estimates.

1984-04-01T23:59:59.000Z

367

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":""}]}

368

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":""}]}

369

Subhourly wind forecasting techniques for wind turbine operations  

DOE Green Energy (OSTI)

Three models for making automated forecasts of subhourly wind and wind power fluctuations were examined to determine the models' appropriateness, accuracy, and reliability in wind forecasting for wind turbine operation. Such automated forecasts appear to have value not only in wind turbine control and operating strategies, but also in improving individual wind turbine control and operating strategies, but also in improving individual wind turbine operating strategies (such as determining when to attempt startup). A simple persistence model, an autoregressive model, and a generalized equivalent Markhov (GEM) model were developed and tested using spring season data from the WKY television tower located near Oklahoma City, Oklahoma. The three models represent a pure measurement approach, a pure statistical method and a statistical-dynamical model, respectively. Forecasting models of wind speed means and measures of deviations about the mean were developed and tested for all three forecasting techniques for the 45-meter level and for the 10-, 30- and 60-minute time intervals. The results of this exploratory study indicate that a persistence-based approach, using onsite measurements, will probably be superior in the 10-minute time frame. The GEM model appears to have the most potential in 30-minute and longer time frames, particularly when forecasting wind speed fluctuations. However, several improvements to the GEM model are suggested. In comparison to the other models, the autoregressive model performed poorly at all time frames; but, it is recommended that this model be upgraded to an autoregressive moving average (ARMA or ARIMA) model. The primary constraint in adapting the forecasting models to the production of wind turbine cluster power output forecasts is the lack of either actual data, or suitable models, for simulating wind turbine cluster performance.

Wegley, H.L.; Kosorok, M.R.; Formica, W.J.

1984-08-01T23:59:59.000Z

370

DRIFT : a numerical simulation solution for cooling tower drift eliminator performance  

E-Print Network (OSTI)

A method for the analysis of the performance of standard industrial evaporative cooling tower drift

Chan, Joseph Kwok-Kwong

371

Best Practice for Energy Efficient Cleanrooms: Cooling tower and condenser water optimization  

E-Print Network (OSTI)

condenser water optimization Tengfang Xu Contents HVAC WATERHVAC Water Systems Cooling tower and condenser water optimization

Xu, Tengfang

2005-01-01T23:59:59.000Z

372

2009 WIND TURBINE IMPACT STUDY APPRAISAL GROUP ONE 9/9/2009 WIND TURBINE IMPACT STUDY  

E-Print Network (OSTI)

This is a study of the impact that wind turbines have on residential property value. The wind turbines that are the focus of this study are the larger turbines being approximately 389ft tall and producing 1.0+ megawatts each, similar to the one pictured to the right. The study has been broken into three component parts, each looking at the value impact of the wind turbines from a different perspective. The three parts are: (1) a literature study, which reviews and summarizes what has been published on this matter found in the general media; (2) an opinion survey, which was given to area Realtors to learn their opinions on the impact of wind turbines in

Fond Du; Lac Counties Wisconsin

2009-01-01T23:59:59.000Z

373

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

374

International cooling-tower and spray pond symposium  

Science Conference Proceedings (OSTI)

This document contains the manuscripts of sixty-one papers that were presented at the 7th Cooling Tower and Spray Pond Symposium of the International Association for Hydraulic Research, organized by the B.E. Vedeneev Institute (VNIIG) and held in Leningrad, USSR, in June 1990. This report represents a worldwide state-of-the-art survey of recent work on cooling towers and spray ponds. Individual papers are indexed separately on the energy database.

Not Available

1990-09-01T23:59:59.000Z

375

Environmental Impacts from the Operation of Cooling Towers at SRP  

SciTech Connect

An assessment has been made of the environmental effects that would occur from the operation of cooling towers at the SRP reactors. A more realistic numerical model of the cooling tower plume has been used to reassess the environmental impacts. The following effects were considered: (1) the occurrence of fog and ice and their impact on nearby structures, (2) drift and salt deposition from the plume, (3) the length and height of the visible plume, and (4) the possible dose from tritium.

Smith, F.G. III

2001-06-26T23:59:59.000Z

376

Cooling Tower Optimization Study Technical Update for 2012  

Science Conference Proceedings (OSTI)

This report is a technical update on the progress of testing three different configurations of cooling tower fan drives. The particular focus is upon the gear box where most disabling failures are occurring. It will describe the configurations and instrumentation used to track the ongoing operational conditions being monitored.The standard mode of operation for a cooling tower fan motor is either on or off, as it may be cost-effective to take some cells out of service under certain ...

2012-12-20T23:59:59.000Z

377

Extreme Winds and Wind Effects on Structures  

Science Conference Proceedings (OSTI)

Extreme Winds and Wind Effects on Structures. The Engineering ... section. I. Extreme Winds: ... II. Wind Effects on Buildings. Database ...

2013-01-17T23:59:59.000Z

378

New Urbanism: "The Vancouver Model" [Speaking of Places  

E-Print Network (OSTI)

Hong Kong rules created tall, thin towers. These built-forms, preference for tall, thin towers. The Hong Kong buildingbecome a has built tall, thin towers there that are homes to

Boddy, Trevor

2004-01-01T23:59:59.000Z

379

The Vertical Turn: Topographies of Metropolitan Modernism  

E-Print Network (OSTI)

pastoral city, with the tall tower standing as a guidingreach a church with a tall tower, which she climbs up. Then,tall sequoia trees outside the city, and of course the church tower

Haacke, Paul

2011-01-01T23:59:59.000Z

380

The MODIS (Collection V005) BRDF/albedo product: Assessment of spatial representativeness over forested landscapes  

E-Print Network (OSTI)

as observed from a very tall tower. Global Change Biology,will be the case for a tall tower instrument setup which isWLEF-ChEAS Park Falls tall tower (Fig. 5G) has the largest

2009-01-01T23:59:59.000Z

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


381

Water Vapor Variability Across Spatial Scales: Insights for Theory, Parameterization, and Model Assessment  

E-Print Network (OSTI)

3 Spatial Structure Function Analysis of Very Tall Tower 3.1as observed from a very tall tower. Global Change Biology,mea- surements from a tall tower. Extended Abstracts, 13th

Pressel, Kyle Gregory

2012-01-01T23:59:59.000Z

382

Quantifying the ecosystem-scale emission and deposition fluxes of biogenic volatile organic compounds (BVOC) and their oxidation products above plant canopies  

E-Print Network (OSTI)

schedule on the 18 m tall tower during BEARPEX 2009. Theschedule on the 18 m tall tower during BEARPEX 2009. The2010). A new 18 m tall scaffolding tower was built in 2007

Park, Jeong-Hoo

2012-01-01T23:59:59.000Z

383

Are tropical forests near a high temperature threshold?  

E-Print Network (OSTI)

and a 30-m tall tower at km-83. The km-83 scaffold wasground level on a 67-m tall tower (Rohn 55G, Rohn, Peoria,field sites, working off a 45-m tall scaffold tower at km-67

Doughty, Christopher E.; Goulden, Michael L.

2008-01-01T23:59:59.000Z

384

The Strip: Las Vegas and the Symbolic Destruction of Spectacle  

E-Print Network (OSTI)

It was a 1,149 foot tall tower – the tallest freestandingfront of the towers stood a 150-foot tall replica of Statuea “Champagne Tower,” a 20-foot wide diameter, 80-foot tall

Al, Stefan Johannes

2010-01-01T23:59:59.000Z

385

Development of an Implementation Plan for Atmospheric Carbon Monitoring in California  

E-Print Network (OSTI)

carbon dioxide on very tall towers: results of the NOAA/CMDLDioxide on a Very Tall Tower. Tellus Series B-Chemical &vapor measurements from a tall tower. JGR-Atmospheres 109:

Fischer, Marc L.; Riley, William J.; Tonse, Shaheen

2004-01-01T23:59:59.000Z

386

Evaluation of the Results of Several Full-Scale Conductor Wind Loading Experiments  

Science Conference Proceedings (OSTI)

In 1991, EPRI's Transmission Line Mechanical Research Center (TLMRC) conducted an experiment that instrumented a transmission tower and two spans of conductors. The instrumentation collected the wind data in a form that could be processed using some of the data reduction methods adopted in previous wind loading experiments conducted by Ontario Hydro, Bonneville Power Administration, and Hydro Quebec.

1995-01-10T23:59:59.000Z

387

Installing and Maintaining a Small Wind Electric System | Department of  

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

Installing and Maintaining a Small Wind Electric System Installing and Maintaining a Small Wind Electric System Installing and Maintaining a Small Wind Electric System July 2, 2012 - 8:22pm Addthis Installing and Maintaining a Small Wind Electric System What does this mean for me? When installing a wind system, the location of the system, the energy budget for the site, the size of the system, and the height of the tower are important elements to consider. Deciding whether to connect the system to the electric grid or not is also an important decision. If you went through the planning steps to evaluate whether a small wind electric system will work at your location, you will already have a general idea about: The amount of wind at your site The zoning requirements and covenants in your area The economics, payback, and incentives of installing a wind system

388

NREL: Wind Research - Utility Grid Integration Assessment  

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

Utility Grid Integration Assessment Utility Grid Integration Assessment Photo of large power transmission towers set against a sunset. The national need for transmission improvements will have a direct impact on the effective use of renewable energy sources such as wind. For wind energy to play a larger role in supplying the nation's energy needs, integrating wind energy into the power grid of the United States is an important challenge to address. NREL's transmission grid integration staff collaborates with utility industry partners and provides data, analysis, and techniques to increase utility understanding of integration issues and confidence in the reliability of new wind turbines. For more information, contact Brian Parsons at 303-384-6958. Printable Version Wind Research Home Capabilities

389

Helicoidal vortex model for wind turbine aeroelastic simulation  

Science Conference Proceedings (OSTI)

The vortex method has been extended to account for blade flexibility, which is a potential source of unsteadiness in the flow past a wind turbine rotor. The code has been validated previously under the assumption of rigid blades. The aerodynamics method ... Keywords: Blade flexibility, Steady and unsteady flows, Tower interference, Vortex model

Jean-Jacques Chattot

2007-06-01T23:59:59.000Z

390

Kaneohe, Hawaii Wind Resource Assessment Report  

DOE Green Energy (OSTI)

The Department of Energy (DOE) has an interagency agreement to assist the Department of Defense (DOD) in evaluating the potential to use wind energy for power at residential properties at DOD bases in Hawaii. DOE assigned the National Renewable Energy Laboratory (NREL) to facilitate this process by installing a 50-meter (m) meteorological (Met) tower on residential property associated with the Marine Corps Base Housing (MCBH) Kaneohe Bay in Hawaii.

Robichaud, R.; Green, J.; Meadows, B.

2011-11-01T23:59:59.000Z

391

Analysis of mass transfer performance in an air stripping tower  

Science Conference Proceedings (OSTI)

The carryover of working solution in a traditional stripping tower is of serious concern in real applications. A U-shaped spray tower to prevent carryover has been designed to study the stripping of water vapor from aqueous desiccant solutions of 91.8 to 95.8 wt% triethylene glycol. In this study, water vapor was removed from the diluted desiccant solution by heating the solution and stripping it with the ambient air. Therefore, the solution was concentrated to a desired concentration. This spray tower was capable of handling air flow rates from 3.2 to 5.13 kg/min and liquid flow rates from 1.6 to 2.76 kg/min. Since the literature data on air stripping towers are limited, studies on the mass transfer coefficient and other mass transfer parameters were carried out in this study. Under the operating conditions, the overall mass transfer coefficient calculated from the experimental data varied from 0.053 to 0.169 mol/m{sup 3}{center{underscore}dot}s. These corresponded to heights of a transfer unit of 2.3 to 0.71 m, respectively. The rates of stripping in this spray tower were typically varied from 2.28 to 12.15 kg H{sub 2}O/h. A correlation of the mass transfer coefficient for the air stripping process was also developed in this study.

Chung, T.W.; Lai, C.H.; Wu, H.

1999-10-01T23:59:59.000Z

392

Integrated reactor-containment hyperbolic-cooling-tower system  

Science Conference Proceedings (OSTI)

A preliminary feasibility analysis has been conducted to evaluate placing a nuclear reactor containment building inside a large hyperbolic cooling tower, a concept previously suggested for fossil-fired units but for reasons other than those that motivate this evaluation. The geometry of the design, the amount of water available, and the shielding provided by the cooling tower are beneficial to the safety characteristics of the containment under accident conditions. Three means of decay heat management are employed: an initial water spray on the containment exterior, long-term air convection on side of the containment, and creation of a water pool inside the containment. A continuously spraying water tank on top of the containment allows for a completely passive decay heat removal system. An annular air chimney around the containment is effective in long-term removal of {approximately} 1O MW (thermal) through air convection. Five percent of the water inventory in the cooling-tower pond surrounding the containment is sufficient to flood the containment interior to a depth of 14.6 ft, thereby providing an internal containment heat sink. The packing and the height of the tower provide major scrubbing and dispersing sources for any uncontrolled radioactive leak. The cooling tower veil also protects the containment from external events such as lane crashes.

Patel, A.R.; Todreas, N.E.; Driscoll, M.J. [Massachusetts Institute of Technology, Cambridge, MA (United States)

1994-12-31T23:59:59.000Z

393

NIST Radio Station WWV  

Science Conference Proceedings (OSTI)

... Each antenna is mounted on a tower that is approximately one half-wavelength tall. The tallest tower, for 2.5 MHz, is about 60 m tall. ...

2011-12-23T23:59:59.000Z

394

BIOMETRIC AND MICROMETEOROLOGICAL MEASUREMENTS OF TROPICAL FOREST CARBON BALANCE  

E-Print Network (OSTI)

dioxide fluxes from a very tall tower in a northern forest:67 m tall, 46 cm triangular cross section tower (model 55G;

2004-01-01T23:59:59.000Z

395

Calibration of the Total Carbon Column Observing Network using Aircraft Profile Data  

E-Print Network (OSTI)

abundances at the Wisconsin Tall Tower site, J. Geophys.Fractions from the NOAA ESRL Tall Tower Network, 1992-2009,

Wunch, Debra

2010-01-01T23:59:59.000Z

396

Rebuilding London's Landscape [Landscape as Mentor  

E-Print Network (OSTI)

proposed one-thousand-foot-tall tower. People say that it isdo you decide how tall Foster’s tower should be? London sits

Shepheard, Paul

2000-01-01T23:59:59.000Z

397

The Role of Prior Knowledge and Problem Contexts in Students' Explanations of Complex System  

E-Print Network (OSTI)

fall down. [gestures the tall tower of sand falling down].if you imagine a tower of sand [gestures a tall dune] umm,

Barth-Cohen, Lauren April

2012-01-01T23:59:59.000Z

398

First order structure function analysis of statistical scale invariance n the AIRS Observed Water Vapor Field  

E-Print Network (OSTI)

measure- ments from a tall tower. http://ams.confex.com/the 396 m level of a tall tower display a nocturnal increase

Pressel, K.G.

2013-01-01T23:59:59.000Z

399

Atmospheric Inverse Estimates of Methane Emissions from Central California  

E-Print Network (OSTI)

mixing ratios measured at a tall-tower are compared to modelmade at 91 and 483 m on a tall-tower near Walnut Grove, CA (

Zhao, Chuanfeng

2009-01-01T23:59:59.000Z

400

Marjorie Alexander Joins the Army  

E-Print Network (OSTI)

tall structures that stood out, one looking like a water tower,tall steeple, the third tallest structure on the base behind the two towers,

Dean, Laurel Roberta

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tall tower wind" 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

A method for evaluating bias in global measurements of CO2 total columns from space  

E-Print Network (OSTI)

abundances at the Wisconsin Tall Tower site, J. Geophys.from the co-located tall tower when they were available.

Wunch, D.

2013-01-01T23:59:59.000Z

402

Observation of CH4 and other Non-CO2 Green House Gas Emissions from California  

E-Print Network (OSTI)

long-lived GHGs at two tall-towers in central California.made by a future network of tall-tower stations spread over

Fischer, Marc L.

2009-01-01T23:59:59.000Z

403

EERE: Wind  

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

EERE: Buildings The U.S. Department of Energy funds R&D to develop wind energy. Learn about the DOE Wind Program, how to use wind energy and get financial incentives, and access...

404

WIND ENERGY Wind Energ. (2012)  

E-Print Network (OSTI)

WIND ENERGY Wind Energ. (2012) Published online in Wiley Online Library (wileyonlinelibrary since energy production depends non-linearly on wind speed (U ), and wind speed observa- tions for the assessment of future long-term wind supply A. M. R. Bakker1 , B. J. J. M. Van den Hurk1 and J. P. Coelingh2 1

Haak, Hein

405

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 cooling towers in operation are performing at levels as low as 50% of capability. This is energy wasteful and financially foolish. There are many reasons for this deficiency, among them the present service is greater than the original requirements, slippage due to age and deterioration, or the installation could have been originally installed undersized. This paper will investigate the various elements, their functions and methods of upgrading their performance by retrofit with the use of modern technology. Case histories will be examined in three major industries, chemicals, refrigeration and petrochemical illustrating how intelligent rebuilding can produce profits and conserve energy. Actual statistics will be cited showing that the return of investment (ROI) can be quite rapid by optimizing the performance of the cooling tower.

Burger, R.

1981-01-01T23:59:59.000Z

406

Conversion of Solar Two to a Kokhala hybrid power tower  

DOE Green Energy (OSTI)

The continued drop in energy prices and restructuring of the utility industry have reduced the likelihood that a follow-on commercial 100-MW, power tower project will be built immediately following the Solar Two demonstration project. Given this, it would be desirable to find a way to extend the life of the Solar Two project to allow the plant to operate as a showcase for future power tower projects. This paper looks at the possibility of converting Solar Two into a commercial Kokhala hybrid power tower plant at the end of its demonstration period in 1998. The study identifies two gas turbines that could be integrated into a Kokhala cycle at Solar Two and evaluates the design, expected performance, and economics of each of the systems. The study shows that a commercial Kokhala project at Solar Two could produce power at a cost of less than 7 e/kWhr.

Price, H.W.

1997-06-01T23:59:59.000Z

407

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

408

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

409

Solar Two: A successful power tower demonstration project  

DOE Green Energy (OSTI)

Solar Two, a 10MWe power tower plant in Barstow, California, successfully demonstrated the production of grid electricity at utility-scale with a molten-salt solar power tower. This paper provides an overview of the project, from inception in 1993 to closure in the spring of 1999. Included are discussions of the goals of the Solar Two consortium, the planned-vs.-actual timeline, plant performance, problems encountered, and highlights and successes of the project. The paper concludes with a number of key results of the Solar Two test and evaluation program.

REILLY,HUGH E.; PACHECO,JAMES E.

2000-03-02T23:59:59.000Z

410

Wind Resource Assessment Report: Mille Lacs Indian Reservation, Minnesota  

DOE Green Energy (OSTI)

The U.S. Environmental Protection Agency (EPA) launched the RE-Powering America's Land initiative to encourage development of renewable energy on potentially contaminated land and mine sites. EPA collaborated with the U.S. Department of Energy's (DOE's) National Renewable Energy Laboratory (NREL) and the Mille Lacs Band of Chippewa Indians to evaluate the wind resource and examine the feasibility of a wind project at a contaminated site located on the Mille Lacs Indian Reservation in Minnesota. The wind monitoring effort involved the installation of a 60-m met tower and the collection of 18 months of wind data at multiple heights above the ground. This report focuses on the wind resource assessment, the estimated energy production of wind turbines, and an assessment of the economic feasibility of a potential wind project sited this site.

Jimenez, A. C.

2013-12-01T23:59:59.000Z

411

Wind Turbine Safety and Function Test Report for the Mariah Windspire Wind Turbine  

SciTech Connect

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers to wind energy expansion by providing independent testing results for small wind turbines (SWT). In total, five turbines were tested at the National Wind Technology Center (NWTC) as a part of this project. Safety and function testing is one of up to five tests performed on the turbines, including power performance, duration, noise, and power-quality tests. NWTC testing results provide manufacturers with reports that may be used to meet part of small wind turbine certification requirements. The test equipment includes a Mariah Windspire wind turbine mounted on a monopole tower. L&E Machine manufactured the turbine in the United States. The inverter was manufactured separately by Technology Driven Products in the United States. The system was installed by the NWTC site operations group with guidance and assistance from Mariah Power.

Huskey, A.; Bowen, A.; Jager, D.

2010-07-01T23:59:59.000Z

412

New England Wind Forum: A Wind Powering America Project, Newsletter #5 -- January 2010, Wind and Hydropower Technologies Program (WHTP)  

Wind Powering America (EERE)

5 - January 2010 5 - January 2010 Two 600-kW wind turbines were installed on Deer Island in August 2009 next to the wastewater treatment facility's anaerobic digesters. Due to their proximity to Logan Airport, these generators were installed on unusually short 32-meter towers. WIND AND HYDROPOWER TECHNOLOGIES PROGRAM continued on page 2 > Kathryn Craddock, Sustainable Energy Advantage, LLC/PIX16710 Wind Projects Sprout Throughout New England NEWF is pleased to provide you with its fifth edition of the electronic NEWF newsletter. This newsletter provides updates on a broad range of project proposals and policy initiatives across New England during the funding hiatus...consider it a "catch-up" double issue. In past newsletters, we've relied on wind farm photo-simulations, photos of early construction

413

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

414

Property:CoolingTowerWaterUseAnnlAvgGross | Open Energy Information  

Open Energy Info (EERE)

Property Name CoolingTowerWaterUseAnnlAvgGross Property Type Number Description Cooling Tower Water use (annual average) (afday) Gross. Retrieved from "http:en.openei.orgw...

415

Microphysical Measurements from an Aircraft Ascending with a Growing Isolated Maritime Cumulus Tower  

Science Conference Proceedings (OSTI)

The development of precipitation in the top of an isolated maritime cumulus tower is traced by four rapid penetrations with an instrumented aircraft between 400 and 1000 m below the visible top of the growing tower. The hydrometeor distribution ...

Paul T. Willis; John Hallett

1991-01-01T23:59:59.000Z

416

Wind Development on Tribal Lands  

SciTech Connect

Background: The Rosebud Sioux Tribe (RST) is located in south central South Dakota near the Nebraska border. The nearest community of size is Valentine, Nebraska. The RST is a recipient of several Department of Energy grants, written by Distributed Generation Systems, Inc. (Disgen), for the purposes of assessing the feasibility of its wind resource and subsequently to fund the development of the project. Disgen, as the contracting entity to the RST for this project, has completed all the pre-construction activities, with the exception of the power purchase agreement and interconnection agreement, to commence financing and construction of the project. The focus of this financing is to maximize the economic benefits to the RST while achieving commercially reasonable rates of return and fees for the other parties involved. Each of the development activities required and its status is discussed below. Land Resource: The Owl Feather War Bonnet 30 MW Wind Project is located on RST Tribal Trust Land of approximately 680 acres adjacent to the community of St. Francis, South Dakota. The RST Tribal Council has voted on several occasions for the development of this land for wind energy purposes, as has the District of St. Francis. Actual footprint of wind farm will be approx. 50 acres. Wind Resource Assessment: The wind data has been collected from the site since May 1, 2001 and continues to be collected and analyzed. The latest projections indicate a net capacity factor of 42% at a hub height of 80 meters. The data has been collected utilizing an NRG 9300 Data logger System with instrumentation installed at 30, 40 and 65 meters on an existing KINI radio tower. The long-term annual average wind speed at 65-meters above ground level is 18.2 mph (8.1 mps) and 18.7 mph (8.4 mps) at 80-meters agl. The wind resource is excellent and supports project financing.

Ken Haukaas; Dale Osborn; Belvin Pete

2008-01-18T23:59:59.000Z

417

Solar Power Tower Design Basis Document, Revision 0  

DOE Green Energy (OSTI)

This report contains the design basis for a generic molten-salt solar power tower. A solar power tower uses a field of tracking mirrors (heliostats) that redirect sunlight on to a centrally located receiver mounted on top a tower, which absorbs the concentrated sunlight. Molten nitrate salt, pumped from a tank at ground level, absorbs the sunlight, heating it up to 565 C. The heated salt flows back to ground level into another tank where it is stored, then pumped through a steam generator to produce steam and make electricity. This report establishes a set of criteria upon which the next generation of solar power towers will be designed. The report contains detailed criteria for each of the major systems: Collector System, Receiver System, Thermal Storage System, Steam Generator System, Master Control System, and Electric Heat Tracing System. The Electric Power Generation System and Balance of Plant discussions are limited to interface requirements. This design basis builds on the extensive experience gained from the Solar Two project and includes potential design innovations that will improve reliability and lower technical risk. This design basis document is a living document and contains several areas that require trade-studies and design analysis to fully complete the design basis. Project- and site-specific conditions and requirements will also resolve open To Be Determined issues.

ZAVOICO,ALEXIS B.

2001-07-01T23:59:59.000Z

418

800mm luxury : pencil tower phenomenon in Hong Kong, China  

E-Print Network (OSTI)

150m2 - 40m2 - 60m3. Pencil Towers are slender pencil-like apartment buildings. They are commonly found in high-dense Asian cities such as Hong Kong, Tokyo and Singapore. Focusing on Hong Kong as the context of research, ...

Yam, Hiu Lan

2012-01-01T23:59:59.000Z

419

Executive Summary: Assessment of Parabolic Trough and Power Tower Solar Technology Cost and Performance Forecasts  

DOE Green Energy (OSTI)

Sargent& Lundy LLC conducted an independent analysis of parabolic trough and power tower solar technology cost and performance.

Not Available

2003-10-01T23:59:59.000Z

420

Assessment of Parabolic Trough and Power Tower Solar Technology Cost and Performance Forecasts  

DOE Green Energy (OSTI)

Sargent and Lundy LLC conducted an independent analysis of parabolic trough and power tower solar technology cost and performance.

Not Available

2003-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "tall tower wind" 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

A viral system algorithm to optimize the car dispatching in elevator group control systems of tall buildings  

Science Conference Proceedings (OSTI)

Nowadays is very common the presence of tall buildings in the business centres of the main cities of the world. Such buildings require the installation of numerous lifts that are coordinated and managed under a unique control system. Population working ... Keywords: Bio-inspired algorithms, Elevator, Elevator group control system, Lift, Vertical transportation, Viral system

Pablo CortéS; Luis Onieva; JesúS MuñUzuri; José Guadix

2013-01-01T23:59:59.000Z

422

Radiometric Modeling of Mechanical Draft Cooling Towers to Assist in the Extraction of their Absolute Temperature  

E-Print Network (OSTI)

Radiometric Modeling of Mechanical Draft Cooling Towers to Assist in the Extraction CENTER FOR IMAGING SCIENCE Title of Dissertation: Radiometric Modeling of Mechanical Draft Cooling Towers of Mechanical Draft Cooling Towers to Assist in the Extraction of their Absolute Temperature from Remote Thermal

Salvaggio, Carl

423

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

424

Wind Energy  

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

FUPWG Meeting FUPWG Meeting NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy operated by the Alliance for Sustainable Energy, LLC Robi Robichaud November 18, 2009 Topics Introduction Review of the Current Wind Market Drivers for Wind Development Siting g Issues Wind Resource Assessment Wind Characteristics Wind Power Potential Basic Wind Turbine Theory Basic Wind Turbine Theory Types of Wind Turbines Facts About Wind Siting Facts About Wind Siting Wind Performance 1. United States: MW 1 9 8 2 1 9 8 3 1 9 8 4 1 9 8 5 1 9 8 6 1 9 8 7 1 9 8 8 1 9 8 9 1 9 9 0 1 9 9 1 1 9 9 2 1 9 9 3 1 9 9 4 1 9 9 5 1 9 9 6 1 9 9 7 1 9 9 8 1 9 9 9 2 0 0 0 2 0 0 1 2 0 0 2 2 0 0 3 2 0 0 4 2 0 0 5 2 0 0 6 2 0 0 7 2 0 0 8 Current Status of the Wind Industry Total Global Installed Wind Capacity Total Global Installed Wind Capacity Total Global Installed Wind Capacity

425

Refining Crude Oil - Energy Explained, Your Guide To Understanding ...  

U.S. Energy Information Administration (EIA)

The resulting liquids and vapors are discharged into distillation towers. ... horizontal vessels and tall, skinny towers that loom above other ...

426

Wind Farm Feasibility Study  

Science Conference Proceedings (OSTI)

Saint Francis University has assessed the Swallow Farm property located in Shade Township, Somerset County, Pennsylvania as a potential wind power development site. Saint Francis worked with McLean Energy Partners to have a 50-meter meteorological tower installed on the property in April 2004 and continues to conduct a meteorological assessment of the site. Results suggest a mean average wind speed at 80 meters of 17 mph with a net capacity factor of 31 - 33%. Approximate electricity generation capacity of the project is 10 megawatts. Also, the University used matching funds provided by the federal government to contract with ABR, Inc. to conduct radar studies of nocturnal migration of birds and bats during the migrations seasons in the Spring and Fall of 2005 with a mean nocturnal flight altitude of 402 meters with less than 5% of targets at altitudes of less than 125 meters. The mean nocturnal passage rate was 166 targets/km/h in the fall and 145 targets/km/h in the spring. Lastly, University faculty and students conducted a nesting bird study May - July 2006. Seventy-three (73) species of birds were observed with 65 determined to be breeding or potentially breeding species; this figure represents approximately 30% of the 214 breeding bird species in Pennsylvania. No officially protected avian species were determined to be nesting at Swallow Farm.

Richard Curry; Erik Foley; DOE Project Officer - Keith Bennett

2007-07-11T23:59:59.000Z

427

Wind Equipment: Creating Jobs Along the Lake Erie Shore | Department of  

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

Wind Equipment: Creating Jobs Along the Lake Erie Shore Wind Equipment: Creating Jobs Along the Lake Erie Shore Wind Equipment: Creating Jobs Along the Lake Erie Shore August 16, 2012 - 9:36am Addthis 1 of 3 Finished wind tower sections await load-out at Ventower Industries, state-of-the-art fabrication facility in Monroe, MI. Image: Ventower Industries. 2 of 3 Ventower operations team loading out first sections produced at Monroe plant. Image: Ventower Industries 3 of 3 Production team members in attendance at Ventower's ribbon cutting ceremony in August 2011. Image: Ventower Industries Monroe, Michigan Niketa Kumar Niketa Kumar Public Affairs Specialist, Office of Public Affairs What are the key facts? Ventower Industries supplies wind turbine towers for projects throughout the Great Lakes and Northeast regions. Since opening, the company has grown to 53 employees.

428

Is a Small Wind Energy System Right for You? | Department of Energy  

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

Is a Small Wind Energy System Right for You? Is a Small Wind Energy System Right for You? Is a Small Wind Energy System Right for You? November 17, 2010 - 6:30am Addthis Erin R. Pierce Erin R. Pierce Digital Communications Specialist, Office of Public Affairs When I think of wind technology, an image comes to mind of a towering fleet of turbines. Although I've never seen a wind farm up close, I've heard from several people that it's an awe-inspiring sight. I may not have the chance to see a large-scale wind farm anytime soon, but I have had the opportunity to examine a small wind energy system-an alternative source of energy that can fully or partially provide power for the home. In the same way, a small wind energy system can provide a significant amount of clean, renewable energy for your home. Wind turbines work by

429

Theoretical analysis of natural-convection towers for solar-energy conversion  

DOE Green Energy (OSTI)

A theoretical study of solar-powered natural convection tower (chimney) performance is presented. Both heated and cooled towers are analyzed, the latter using evaporating water as the cooling mechanism. The results, which are applicable to any open-cycle configuration, show that the ideal conversion efficiencies of both heated and cooled natural convection towers are linear functions of height. The performance of a heated tower in an adiabatic atmospheric ideally approaches the Carnot efficiency limit of approx. 3.4%/km(1.0%/1000 ft). Including water pumping requirements, the ideal limit to cooled tower performance is approx. 2.75%/km(0.85%/1000 ft). Ambient atmospheric conditions such as vertical temperature gradient (lapse rate) and relative humidity can have significantly adverse effects on natural convection tower performance. The combined effects of lapse rate and ambient relative humidity are especially important for cooled natural convection towers.

Lasier, D.D.; Jacobs, E.W.

1983-05-01T23:59:59.000Z

430

Variability of wind power near Oklahoma City and implications for siting of wind turbines  

SciTech Connect

Data from five sites near Oklahoma City were examined to assess wind power availability. Wind turbines of identical manufacture were operated at three of the sites, one of which was also equipped with anemometers on a 100-ft tower. Comprehensive anemometric data were available from the other two sites. The study indicates that the average wind speed varies substantially over Oklahoma's rolling plains, which have often been nominally regarded as flat for purposes of wind power generation. Average wind differences may be as much as 5 mph at 20 ft above ground level, and 7 mph at 100 ft above ground level for elevation differences of about 200 ft above mean sea level, even in the absence of substantial features of local terrain. Local altitude above mean sea level seems to be as influential as the shape of local terrain in determining the average wind speed. The wind turbine used at a meteorologically instrumented site in the study produced the power expected from it for the wind regime in which it was situated. The observed variations of local wind imply variations in annual kWh of as much as a factor of four between identical turbines located at similar heights above ground level in shallow valleys and on hilltops or elevated extended flat areas. 17 refs., 39 figs., 11 tabs.

Kessler, E.; Eyster, R.

1987-09-01T23:59:59.000Z

431

Wind Turbine Safety and Function Test Report for the ARE 442 Wind Turbine  

DOE Green Energy (OSTI)

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, four turbines were tested at the National Wind Technology Center (NWTC) as a part of this project. Safety and function testing is one of up to five tests that were performed on the turbines, including power performance, duration, noise, and power quality tests. Test results provide manufacturers with reports that can be used for small wind turbine certification. The test equipment includes an ARE 442 wind turbine mounted on a 100-ft free-standing lattice tower. The system was installed by the NWTC Site Operations group with guidance and assistance from Abundant Renewable Energy.

van Dam, J.; Baker, D.; Jager, D.

2010-02-01T23:59:59.000Z

432

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":""}]}

433

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

434

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

435

No Chemical, Zero Bleed Cooling Tower Water Treatment Process  

E-Print Network (OSTI)

This paper describes a process to treat cooling tower water by means of a fully automated and chemical free mechanical water treatment process. This is an alternative to conventional chemical treatment. Beginning with a suction pump to draw water out of the tower sump, water goes through a permanent magnetic descaler to increase the water solubility and begin the scale inhibition process. This also descales existing scale build-up in the system. Ozone is manufactured from ambient air and injected into the bypass system through a venturi type injector. This kills algae, slime and bacteria and enhances the magnetic descaling process. The final stage filter separates solids from the water to prevent corrosion from impingement. These solids are automatically purged to the sanitary drain. Clarified water is returned to the sump where the process repeats on a 10%-20% by volume side stream basis.

Coke, A. L.

1992-04-01T23:59:59.000Z

436

EIA: Wind  

U.S. Energy Information Administration (EIA)

Technical information and data on the wind energy industry from the U.S. Energy Information Administration (EIA).

437

CFD MODELING ANALYSIS OF MECHANICAL DRAFT COOLING TOWER  

Science Conference Proceedings (OSTI)

Industrial processes use mechanical draft cooling towers (MDCT's) to dissipate waste heat by transferring heat from water to air via evaporative cooling, which causes air humidification. The Savannah River Site (SRS) has a MDCT consisting of four independent compartments called cells. Each cell has its own fan to help maximize heat transfer between ambient air and circulated water. The primary objective of the work is to conduct a parametric study for cooling tower performance under different fan speeds and ambient air conditions. The Savannah River National Laboratory (SRNL) developed a computational fluid dynamics (CFD) model to achieve the objective. The model uses three-dimensional steady-state momentum, continuity equations, air-vapor species balance equation, and two-equation turbulence as the basic governing equations. It was assumed that vapor phase is always transported by the continuous air phase with no slip velocity. In this case, water droplet component was considered as discrete phase for the interfacial heat and mass transfer via Lagrangian approach. Thus, the air-vapor mixture model with discrete water droplet phase is used for the analysis. A series of the modeling calculations was performed to investigate the impact of ambient and operating conditions on the thermal performance of the cooling tower when fans were operating and when they were turned off. The model was benchmarked against the literature data and the SRS test results for key parameters such as air temperature and humidity at the tower exit and water temperature for given ambient conditions. Detailed results will be presented here.

Lee, S; Alfred Garrett, A; James02 Bollinger, J; Larry Koffman, L

2008-03-03T23:59:59.000Z

438

2011 CERN Waste Heat EN-CV February 28th 2011 Power Dissipated by the Cooling Towers  

E-Print Network (OSTI)

2011 CERN Waste Heat EN-CV February 28th 2012 1 2011 Power Dissipated by the Cooling Towers The cooling circuits at CERN use evaporative open cooling towers to discharge into the atmosphere the heat towers per complex depend on the amount of cooling power required. LHC one cooling tower per even LHC

Wu, Sau Lan

439

Wind Turbine Generator System Duration Test Report for the Gaia-Wind 11 kW Wind Turbine  

DOE Green Energy (OSTI)

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, five turbines are being tested at the National Renewable Energy Laboratory's (NRELs) National Wind Technology Center (NWTC) as a part of this project. Duration testing is one of up to five tests that may be performed on the turbines, including power performance, safety and function, noise, and power quality tests. The results of the testing will provide the manufacturers with reports that may be used for small wind turbine certification. The test equipment includes a Gaia-Wind 11 kW wind turbine mounted on an 18 m monopole tower. Gaia-Wind Ltd. manufactured the turbine in Denmark, although the company is based in Scotland. The system was installed by the NWTC Site Operations group with guidance and assistance from Gaia-Wind.

Huskey, A.; Bowen, A.; Jager, D.

2010-09-01T23:59:59.000Z

440

Ice Loads on a Lattice Tower Estimated by Weather Station Data  

Science Conference Proceedings (OSTI)

Atmospheric ice loads are a major design criterion of tall structures in cold regions. In this paper the possibility to derive the design ice loads using analysis of meteorological observations made routinely at a weather station is studied. Ice ...

Eva Sundin; Lasse Makkonen

1998-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "tall tower wind" 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

New England Wind Forum: Environmental Impacts? Interaction with Birds,  

Wind Powering America (EERE)

Environmental Impacts? Environmental Impacts? The construction and operation of a wind farm will have some local impact to the natural environment, but the specific impacts are site specific. Effects can include avian (bird), bat, and other wildlife activity. Some of the following documents are available as Adobe Acrobat PDFs. Download Adobe Reader. Birds Largely because of the unique circumstances and experiences surrounding one region in Northern California with significant wind energy development in the 1980s, wind power proponents now conduct wildlife (and particularly avian) studies as a regular part of screening sites for development. Earlier generations of wind turbines were smaller and located close together. They were mounted on lattice towers and had rapidly spinning blades. These wind turbines were located in great numbers in the Altamont Pass, an area of rolling grassland home to a substantial population of raptors. A high number of bird kills resulted. Wind technology has advanced substantially since the 1980s. Today's larger turbines have wider spacing, more slowly spinning blades, and are mounted on tubular towers. Nonetheless, wind turbines, like all manmade structures, do have the potential to impact birds and/or bats. Careful selection of development sites avoids placement in particularly sensitive locations, and for well-sited wind projects, avian impacts can be minimal including relative to other sources of avian collision. The National Wind Coordinating Collaborative published a report discussing bird interaction with wind turbines in the Spring of 2010, "Wind Turbine Interactions with Birds, Bats, and their Habitats: A Summary of Research Results and Priority Questions (PDF 2.0 MB)."

442

High Flux Isotopes Reactor (HFIR) Cooling Towers Demolition Waste Management  

SciTech Connect

This paper describes the results of a joint initiative between Oak Ridge National Laboratory, operated by UT-Battelle, and Bechtel Jacobs Company, LLC (BJC) to characterize, package, transport, treat, and dispose of demolition waste from the High Flux Isotope Reactor (HFIR), Cooling Tower. The demolition and removal of waste from the site was the first critical step in the planned HFIR beryllium reflector replacement outage scheduled. The outage was scheduled to last a maximum of six months. Demolition and removal of the waste was critical because a new tower was to be constructed over the old concrete water basin. A detailed sampling and analysis plan was developed to characterize the hazardous and radiological constituents of the components of the Cooling Tower. Analyses were performed for Resource Conservation and Recovery Act (RCRA) heavy metals and semi-volatile constituents as defined by 40 CFR 261 and radiological parameters including gross alpha, gross beta, gross gamma, alpha-emitting isotopes and beta-emitting isotopes. Analysis of metals and semi-volatile constituents indicated no exceedances of regulatory limits. Analysis of radionuclides identified uranium and thorium and associated daughters. In addition 60Co, 99Tc, 226Rm, and 228Rm were identified. Most of the tower materials were determined to be low level radioactive waste. A small quantity was determined not to be radioactive, or could be decontaminated. The tower was dismantled October 2000 to January 2001 using a detailed step-by-step process to aid waste segregation and container loading. The volume of waste as packaged for treatment was approximately 1982 cubic meters (70,000 cubic feet). This volume was comprised of plastic ({approx}47%), wood ({approx}38%) and asbestos transite ({approx}14%). The remaining {approx}1% consisted of the fire protection piping (contaminated with lead-based paint) and incidental metal from conduit, nails and braces/supports, and sludge from the basin. The waste, except for the asbestos, was volume reduced via a private contract mechanism established by BJC. After volume reduction, the waste was packaged for rail shipment. This large waste management project successfully met cost and schedule goals.

Pudelek, R. E.; Gilbert, W. C.

2002-02-26T23:59:59.000Z

443

An examination of wake effects and power production for a group of large wind turbines  

DOE Green Energy (OSTI)

Data from a group of three MOD-2 wind turbines and two meteorological towers at Goodnoe Hills were analyzed to evaluate turbine power output and wake effects (losses in power production due to operation of upwind turbines), and atmospheric factors influencing them. The influences of variations in the ambient wind speed, wind direction, and turbulence intensity were the primary factors evaluated. Meteorological and turbine data collected at the Goodnoe Hills site from April 1 to October 17, 1985, were examined to select the data sets for these analyses. Wind data from the two meteorological towers were evaluated to estimate the effect of a wake from an upwind turbine on the wind flow measured at the downwind tower. Maximum velocity deficits were about 25% and 12% at downwind distances of 5.8 and 8.3 rotor diameters (D), respectively. However, the maximum deficits at 5.8 D were about 14/degree/ off the centerline orientation between the turbine and the tower, indicating significant wake curvature. Velocity deficits were found to depend on the ambient wind speed, ranging from 27% at lower speeds (15 to 25 mph) to 20% at higher speeds (30 to 35 mph). Turbulence intensity increases dramatically in the wake by factors of about 2.3 and 1.5 over ambient conditions at 5.8 D and 8.3 D, respectively. An analysis of the ambient (non-wake) power production for all three turbines showed that the MOD-2 power output depends, not only on wind speed, but also on the turbulence intensity. At wind speeds below rated, there was a dramatic difference in turbine power output between low and high turbulence intensities for the same wind speed. One of the turbines had vortex generators on the blades. This turbine produced from 10% to 13% more power than the other two turbines when speeds were from 24 to 31 mph. 11 refs., 21 figs., 2 tabs.

Elliott, D.L.; Buck, J.W.; Barnard, J.C.

1988-04-01T23:59:59.000Z

444

Laser-induced Breakdown Spectroscopy used to Detect Endophyte-mediated Accumulation of Metals by Tall Fescue  

Science Conference Proceedings (OSTI)

Laser-induced breakdown spectroscopy was used to determine the impact of endophyte (Neotyphodium sp.) infection on elemental composition of tall fescue (Festuca arundinacea). Leaf material from endophyte-infected (E+) and endophyte-free (E-) tall fescue populations in established plots was examined. Leaf-tissue digestates were also tested for metals, by ICP-MS. Seven of eleven metals (Ca, Mg, Fe, Mn, Cu, Ni and Zn) were measured by both techniques at concentrations great enough to reliably compare. Mg, Zn, and Cd, a toxic metal that can be present in forage, were readily detected by LIBS, even though Cd concentrations in the plants were below levels typically achieved using ICP-MS detection. Implications of these results for research on forage analysis and phytoremediation are discussed.

Martin, Madhavi Z [ORNL; Stewart, Arthur J [ORNL; Gwinn, Dr. Kimberley [University of Tennessee, Knoxville (UTK); Waller, John C [ORNL

2010-01-01T23:59:59.000Z

445

Wind Blog  

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

wind-blog Office of Energy Efficiency & Renewable wind-blog Office of Energy Efficiency & Renewable Energy Forrestal Building 1000 Independence Avenue, SW Washington, DC 20585 en Two Facilities, One Goal: Advancing America's Wind Industry http://energy.gov/eere/articles/two-facilities-one-goal-advancing-america-s-wind-industry wind-industry" class="title-link">Two Facilities, One Goal: Advancing America's Wind Industry

446

Effects of multiple climate change factors on the tall fescue-fungal endophyte symbiosis: infection frequency and tissue chemistry.  

Science Conference Proceedings (OSTI)

Climate change (altered CO{sub 2}, warming, and precipitation) may affect plant-microbial interactions, such as the Lolium arundinaceum-Neotyphodium coenophialum symbiosis, to alter future ecosystem structure and function. To assess this possibility, tall fescue tillers were collected from an existing climate manipulation experiment in a constructed old-field community in Tennessee (USA). Endophyte infection frequency (EIF) was determined, and infected (E+) and uninfected (E-) tillers were analysed for tissue chemistry. The EIF of tall fescue was higher under elevated CO{sub 2} (91% infected) than with ambient CO{sub 2} (81%) but was not affected by warming or precipitation treatments. Within E+ tillers, elevated CO{sub 2} decreased alkaloid concentrations of both ergovaline and loline, by c. 30%; whereas warming increased loline concentrations 28% but had no effect on ergovaline. Independent of endophyte infection, elevated CO{sub 2} reduced concentrations of nitrogen, cellulose, hemicellulose, and lignin. These results suggest that elevated CO{sub 2}, more than changes in temperature or precipitation, may promote this grass-fungal symbiosis, leading to higher EIF in tall fescue in old-field communities. However, as all three climate factors are likely to change in the future, predicting the symbiotic response and resulting ecological consequences may be difficult and dependent on the specific atmospheric and climatic conditions encountered.

Brosi, Glade [University of Kentucky; McCulley, Rebecca L [University of Kentucky; Bush, L P [University of Kentucky; Nelson, Jim A [University of Kentucky; Classen, Aimee T [University of Tennessee, Knoxville (UTK); Norby, Richard J [ORNL

2011-01-01T23:59:59.000Z

447

Town of Kill Devil Hills - Wind Energy Systems Ordinance | Department of  

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

Town of Kill Devil Hills - Wind Energy Systems Ordinance Town of Kill Devil Hills - Wind Energy Systems Ordinance Town of Kill Devil Hills - Wind Energy Systems Ordinance < Back Eligibility Agricultural Commercial Industrial Institutional Local Government Nonprofit Residential Schools Savings Category Wind Buying & Making Electricity Program Info State North Carolina Program Type Solar/Wind Permitting Standards Provider Kill Devil Hills Planning and Inspections In October 2007, the town of Kill Devil Hills adopted an ordinance to regulate the use of wind-energy systems. The ordinance directs any individual or organization wishing to install a wind-energy system to obtain a zoning permit from the town planning board. '''Size Requirements:''' Wind turbine towers are restricted to a height of 80 feet with a maximum rotor size of 23 feet in diameter. The combined

448

EA-1966: Sunflower Wind Project, Hebron, North Dakota | Department of  

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

6: Sunflower Wind Project, Hebron, North Dakota 6: Sunflower Wind Project, Hebron, North Dakota EA-1966: Sunflower Wind Project, Hebron, North Dakota SUMMARY Western Area Power Administration (Western) is preparing an EA to evaluate potential environmental impacts of interconnecting a proposed 80 MW generating facility south of Hebron in Morton and Stark Counties, North Dakota. The proposed wind generating facility of 30-50 wind turbines would encompass approximately 9,000 acres. Ancillary facilities would include an underground collection line system, a project substation, one mile of new transmission line, a new switchyard facility on the existing Dickinson-Mandan 230 kV line owned and operated by Western, one permanent meteorological tower, new access roads, and an operations and maintenance building.

449

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":""}]}

450

Duration Test Report for the Ventera VT10 Wind Turbine  

DOE Green Energy (OSTI)

This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small wind turbines. Five turbines were tested at the National Wind Technology Center (NWTC) at the National Renewable Energy Laboratory (NREL) as a part of round one of this project. Duration testing is one of up to five tests that may be performed on the turbines, including power performance, safety and function, noise, and power quality. Test results will provide manufacturers with reports that can be used to fulfill part of the requirements for small wind turbine certification. The test equipment included a grid-connected Ventera Energy Corporation VT10 wind turbine mounted on an 18.3-m (60-ft) self-supporting lattice tower manufactured by Rohn.

Smith, J.; Huskey, A.; Jager, D.; Hur, J.

2013-06-01T23:59:59.000Z

451

Energy Basics: Wind Turbines  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydropower Ocean Solar Wind Wind Turbines Wind Resources Wind Turbines...

452

Standards for Municipal Small Wind Regulations and Small Wind...  

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

Standards for Municipal Small Wind Regulations and Small Wind Model Wind Ordinance Standards for Municipal Small Wind Regulations and Small Wind Model Wind Ordinance Eligibility...

453

Errors in Wind Measurements Estimated by Five-Beam Phased Array Doppler Sodar  

Science Conference Proceedings (OSTI)

Estimation of the errors in sodar wind measurements using the phased array Doppler sodar operated under five-beam observation has been made. When compared with the sonic anemometer on the tower nearby, the variances or second-order moments of ...

Yoshiki Ito

1997-08-01T23:59:59.000Z

454

Real-Time Analysis of Local Wind Patterns for Application to Nuclear-Emergency Response  

Science Conference Proceedings (OSTI)

Pacific Gas and Electric Company (PGandE) has sponsored development of a computer-based system for real-time analysis of local wind measurements in a complex-terrain setting. Mass-consistent modeling of tower- and Doppler-sounder data produces ...

Richard H. Thuillier

1987-09-01T23:59:59.000Z

455

Hybrid Tower Study: Volume 3: Phase 3 -- Scale Model Development and Full-Scale Tests  

Science Conference Proceedings (OSTI)

Hybrid towers maximize the power transmission efficiency of the available space whenever there is the need to have both ac and dc lines in the same corridor. This study developed calculation techniques and design rules for the placement of conductors energized with HVAC and HVDC circuits on the same towers. Significantly, the study did not identify any hybrid interactions that would prevent the successful operation of a hybrid corridor or hybrid tower transmission line.

1994-06-29T23:59:59.000Z

456

Performance analysis of heat transfer processes from wet and dry surfaces : cooling towers and heat exchangers.  

E-Print Network (OSTI)

??The objective of this work is to study the thermal and hydraulic performance of evaporatively cooled heat exchangers, including closed wet cooling towers, and dry… (more)

Hasan, Ala Ali

2005-01-01T23:59:59.000Z

457

Numerical modelling of heat and mass transfer and optimisation of a natural draft wet cooling tower.  

E-Print Network (OSTI)

??The main contribution of this work is to answer several important questions relating to natural draft wet cooling tower (NDWCT) modelling, design and optimisation. Specifically,… (more)

Williamson, Nicholas J

2007-01-01T23:59:59.000Z

458

Performance Analysis of Heat Transfer Processes from Wet and Dry Surfaces: Cooling Towers and Heat Exchangers.  

E-Print Network (OSTI)

??The objective of this work is to study the thermal and hydraulic performance of evaporatively cooled heat exchangers, including closed wet cooling towers, and dry… (more)

Hasan, Ala Ali

2005-01-01T23:59:59.000Z

459

Wind Turbines  

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

Although all wind turbines operate on similar principles, several varieties are in use today. These include horizontal axis turbines and vertical axis turbines.

460

NREL: Wind Research - Large Wind Turbine Research  

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

Wind Research Search More Search Options Site Map Printable Version Large Wind Turbine Research NREL's utility scale wind system research addresses performance and...

Note: This page contains sample records for the topic "tall tower wind" 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

Wind Powering America: Wind Events  

Wind Powering America (EERE)

calendar.asp Lists upcoming wind calendar.asp Lists upcoming wind power-related events. en-us julie.jones@nrel.gov (Julie Jones) http://www.windpoweringamerica.gov/images/wpa_logo_sm.jpg Wind Powering America: Wind Events http://www.windpoweringamerica.gov/calendar.asp Pennsylvania Wind for Schools Educator Workshop https://www.regonline.com/builder/site/Default.aspx?EventID=1352684 http://www.windpoweringamerica.gov/filter_detail.asp?itemid=4068 Wed, 4 Dec 2013 00:00:00 MST 2014 Joint Action Workshop http://www.windpoweringamerica.gov/filter_detail.asp?itemid=3996 http://www.windpoweringamerica.gov/filter_detail.asp?itemid=3996 Mon, 21 Oct 2013 00:00:00 MST AWEA Wind Project Operations and Maintenance and Safety Seminar http://www.windpoweringamerica.gov/filter_detail.asp?itemid=4009 http://www.windpoweringamerica.gov/filter_detail.asp?itemid=4009 Mon, 21

462

Wind Turbine Generator System Duration Test Report for the ARE 442 Wind Turbine  

DOE Green Energy (OSTI)

This test is being conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, four turbines are being tested at the NWTC as a part of this project. Duration testing is one of up to 5 tests that may be performed on the turbines, including power performance, safety and function, noise, and power quality tests. The results of the testing provide manufacturers with reports that may be used for small wind turbine certification. The test equipment includes a grid connected ARE 442 wind turbine mounted on a 30.5 meter (100 ft) lattice tower manufactured by Abundant Renewable Energy. The system was installed by the NWTC Site Operations group with guidance and assistance from Abundant Renewable Energy.

van Dam, J.; Baker, D.; Jager, D.

2010-05-01T23:59:59.000Z

463

A Regenerative High-Rise Tower in Shreveport, Louisiana  

E-Print Network (OSTI)

Zero Net Energy Buildings are increasingly being designed and constructed in response to the demand for sustainable buildings. But, we must now go beyond merely sustaining our environment for future generations we must provide regenerative designs that restore our natural environment. This paper will document the design of a regenerative high-rise tower in Shreveport, Louisiana, which will serve as a facility to train individuals in a non-profit organization’s renewal strategies and demonstrate by example the pedagogy of regenerative design. The 16-story structure — built in the 1950s and named the Petroleum Tower, reflecting the commodity that then ruled the local economy — was vacant and asbestos-laden when given to the non-profit Community Renewal International (CRI) in 2001. In 2006, funded by a grant from the U.S. Environmental Protection Agency, workers removed the asbestos. Through a follow up grant from the U.S. Department of Energy to support the design process of a new CRI headquarters building, the University of Texas at Austin School of Architecture completed architectural design studies for the building renewal. The principles of this new design include: day lighting, envelope configuration, building integrated photovoltaic systems, green surfaces, ventilation strategies, advanced mechanical cooling systems, regenerative elevator systems, energy management systems, water harvesting, grey water systems, trigeneration systems and a combined heating, hot water and power biodiesel plant.

Garrison, M.

2010-08-01T23:59:59.000Z

464

ON THE STRUCTURE AND STABILITY OF MAGNETIC TOWER JETS  

SciTech Connect

Modern theoretical models of astrophysical jets combine accretion, rotation, and magnetic fields to launch and collimate supersonic flows from a central source. Near the source, magnetic field strengths must be large enough to collimate the jet requiring that the Poynting flux exceeds the kinetic energy flux. The extent to which the Poynting flux dominates kinetic energy flux at large distances from the engine distinguishes two classes of models. In magneto-centrifugal launch models, magnetic fields dominate only at scales {approx}< 100 engine radii, after which the jets become hydrodynamically dominated (HD). By contrast, in Poynting flux dominated (PFD) magnetic tower models, the field dominates even out to much larger scales. To compare the large distance propagation differences of these two paradigms, we perform three-dimensional ideal magnetohydrodynamic adaptive mesh refinement simulations of both HD and PFD stellar jets formed via the same energy flux. We also compare how thermal energy losses and rotation of the jet base affects the stability in these jets. For the conditions described, we show that PFD and HD exhibit observationally distinguishable features: PFD jets are lighter, slower, and less stable than HD jets. Unlike HD jets, PFD jets develop current-driven instabilities that are exacerbated as cooling and rotation increase, resulting in jets that are clumpier than those in the HD limit. Our PFD jet simulations also resemble the magnetic towers that have been recently created in laboratory astrophysical jet experiments.

Huarte-Espinosa, M.; Frank, A.; Blackman, E. G. [Department of Physics and Astronomy, University of Rochester, 600 Wilson Boulevard, Rochester, NY 14627-0171 (United States); Ciardi, A. [LERMA, Universite Pierre et Marie Curie, Observatoire de Paris, F-92195 Meudon (France); Hartigan, P. [Department of Physics and Astronomy, Rice University, 6100 S. Main, Houston, TX 77521-1892 (United States); Lebedev, S. V.; Chittenden, J. P. [Blackett Laboratory, Imperial College London, SW7 2BW London (United Kingdom)

2012-09-20T23:59:59.000Z

465

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

466

EA-1966: Sunflower Wind Project, Hebron, North Dakota  

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

Western Area Power Administration (Western) is preparing an EA to evaluate potential environmental impacts of interconnecting a proposed 80 MW generating facility south of Hebron in Morton and Stark Counties, North Dakota. The proposed wind generating facility of 30-50 wind turbines would encompass approximately 9,000 acres. Ancillary facilities would include an underground collection line system, a project substation, one mile of new transmission line, a new switchyard facility on the existing Dickinson-Mandan 230 kV line owned and operated by Western, one permanent meteorological tower, new access roads, and an operations and maintenance building.

467

Separation Processes, Second Edition  

E-Print Network (OSTI)

the far left background. The tall tower at the right is theeither phase, provided the tower is tall enough. The partialtall structure at the left is the flue stack for a furnace preheating the feed to the distillation towers.

King, C. Judson

1980-01-01T23:59:59.000Z

468

Extreme Winds and Wind Effects on Structures  

Science Conference Proceedings (OSTI)

Extreme Winds and Wind Effects on Structures. Description/Summary: The Building and Fire Research Laboratory has an ...

2010-10-04T23:59:59.000Z

469

Great Plains Wind Energy Transmission Development Project  

DOE Green Energy (OSTI)

In fiscal year 2005, the Energy & Environmental Research Center (EERC) received funding from the U.S. Department of Energy (DOE) to undertake a broad array of tasks to either directly or indirectly address the barriers that faced much of the Great Plains states and their efforts to produce and transmit wind energy at the time. This program, entitled Great Plains Wind Energy Transmission Development Project, was focused on the central goal of stimulating wind energy development through expansion of new transmission capacity or development of new wind energy capacity through alternative market development. The original task structure was as follows: Task 1 - Regional Renewable Credit Tracking System (later rescoped to Small Wind Turbine Training Center); Task 2 - Multistate Transmission Collaborative; Task 3 - Wind Energy Forecasting System; and Task 4 - Analysis of the Long-Term Role of Hydrogen in the Region. As carried out, Task 1 involved the creation of the Small Wind Turbine Training Center (SWTTC). The SWTTC, located Grand Forks, North Dakota, consists of a single wind turbine, the Endurance S-250, on a 105-foot tilt-up guyed tower. The S-250 is connected to the electrical grid on the 'load side' of the electric meter, and the power produced by the wind turbine is consumed locally on the property. Establishment of the SWTTC will allow EERC personnel to provide educational opportunities to a wide range of participants, including grade school through college-level students and the general public. In addition, the facility will allow the EERC to provide technical training workshops related to the installation, operation, and maintenance of small wind turbines. In addition, under Task 1, the EERC hosted two small wind turbine workshops on May 18, 2010, and March 8, 2011, at the EERC in Grand Forks, North Dakota. Task 2 involved the EERC cosponsoring and aiding in the planning of three transmission workshops in the midwest and western regions. Under Task 3, the EERC, in collaboration with Meridian Environmental Services, developed and demonstrated the efficacy of a wind energy forecasting system for use in scheduling energy output from wind farms for a regional electrical generation and transmission utility. With the increased interest at the time of project award in the production of hydrogen as a critical future energy source, many viewed hydrogen produced from wind-generated electricity as an attractive option. In addition, many of the hydrogen production-related concepts involve utilization of energy resources without the need for additional electrical transmission. For this reason, under Task 4, the EERC provided a summary of end uses for hydrogen in the region and focused on one end product in particular (fertilizer), including several process options and related economic analyses.

Brad G. Stevens, P.E.; Troy K. Simonsen; Kerryanne M. Leroux

2012-06-09T23:59:59.000Z

470

Wind Energy Leasing Handbook  

E-Print Network (OSTI)

Wind Energy Leasing Handbook Wind Energy Leasing Handbook E-1033 Oklahoma Cooperative Extension?..................................................................................................................... 31 What do wind developers consider in locating wind energy projects?............................................................................................ 37 How do companies and individuals invest in wind energy projects?....................................................................

Balasundaram, Balabhaskar "Baski"

471

Solar Two: A Molten Salt Power Tower Demonstration* Craig E.Tyner  

E-Print Network (OSTI)

Solar Two: A Molten Salt Power Tower Demonstration* Craig E.Tyner Sandia National Laboratories.S. Department of Energy (DOE),Sandia National Laboratories, and industry to convert the 10-MwSolar One Power, is $48.5 million. The plant will begin operation in early 1996. Introduction A solar power tower plant

Laughlin, Robert B.

472

Research for the Crane Boom Length Coefficient Considering the Tower Head Flexibility in Rotary Plane  

Science Conference Proceedings (OSTI)

When the crane boom length in rotary plane is determined, the traditional methods only consider support condition, non-uniform, boom end lateral displacement constraint effect of amplitude dragline and hoist rope tensile forces. Ignoring tower head elastic ... Keywords: Equivalent elastic support method, Rotary plane, Tower head flexibility, Non-conservative loading, Length coefficient

Zhang Guangyun; Lan Peng; Lu Nianli

2011-01-01T23:59:59.000Z

473

Nuclear Maintenance Applications Center: Guideline for Cooling Tower Inspection and Maintenance  

Science Conference Proceedings (OSTI)

Cooling tower structural failures have recently become a focus area for the nuclear industry based on events that have resulted in lost generation as well as high repair costs. Environmental concerns regarding thermal pollution and water usage have also recently increased the need for guidance for cooling tower inspection and maintenance.

2011-06-06T23:59:59.000Z

474

UT tower goes dark to conserve energy by KVUE.com  

E-Print Network (OSTI)

UT tower goes dark to conserve energy by KVUE.com Posted on November 22, 2013 at 5:12 PM Updated, but the first time the tower turned off its lights for the initiative. In previous initiatives, the UT Energy) assisted with turning off lights and electronics across campus to conserve energy. While the clock faces

475

Method and system for simulating heat and mass transfer in cooling towers  

DOE Patents (OSTI)

The present invention is a system and method for simulating the performance of a cooling tower. More precisely, the simulator of the present invention predicts values related to the heat and mass transfer from a liquid (e.g., water) to a gas (e.g., air) when provided with input data related to a cooling tower design. In particular, the simulator accepts input data regarding: (a) cooling tower site environmental characteristics; (b) cooling tower operational characteristics; and (c) geometric characteristics of the packing used to increase the surface area within the cooling tower upon which the heat and mass transfer interactions occur. In providing such performance predictions, the simulator performs computations related to the physics of heat and mass transfer within the packing. Thus, instead of relying solely on trial and error wherein various packing geometries are tested during construction of the cooling tower, the packing geometries for a proposed cooling tower can be simulated for use in selecting a desired packing geometry for the cooling tower.

Bharathan, Desikan (Lakewood, CO); Hassani, A. Vahab (Golden, CO)

1997-01-01T23:59:59.000Z

476

Cooling-Tower Performance Prediction and Improvement: Volumes 1 and 2  

Science Conference Proceedings (OSTI)

New data and methods enable engineers to predict and improve the thermal performance of evaporative cooling towers. Current EPRI research focuses on analytic tools that will help utilities avoid costly operating penalties associated with cooling towers that do not meet thermal performance specifications.

1989-12-01T23:59:59.000Z

477

Wind Powering America: New England Wind Forum  

Wind Powering America (EERE)

About the New England Wind Forum About the New England Wind Forum New England Wind Energy Education Project Historic Wind Development in New England State Activities Projects in New England Building Wind Energy in New England Wind Resource Wind Power Technology Economics 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 The New England Wind Forum was conceived in 2005 as a platform to provide a single, comprehensive and objective source of up-to-date, Web-based information on a broad array of wind-energy-related issues pertaining to New England. The New England Wind Forum provides information to wind energy stakeholders through Web site features, periodic newsletters, and outreach activities. The New England Wind Forum covers the most frequently discussed wind energy topics.

478

PowerJet Wind Turbine Project  

SciTech Connect

PROJECT OBJECTIVE The PowerJet wind turbine overcomes problems characteristic of the small wind turbines that are on the market today by providing reliable output at a wide range of wind speeds, durability, silent operation at all wind speeds, and bird-safe operation. Prime Energy�s objective for this project was to design and integrate a generator with an electrical controller and mechanical controls to maximize the generation of electricity by its wind turbine. The scope of this project was to design, construct and test a mechanical back plate to control rotational speed in high winds, and an electronic controller to maximize power output and to assist the base plate in controlling rotational speed in high winds. The test model will continue to operate beyond the time frame of the project, with the ultimate goal of manufacturing and marketing the PowerJet worldwide. Increased Understanding of Electronic & Mechanical Controls Integrated With Electricity Generator The PowerJet back plate begins to open as wind speed exceeds 13.5 mps. The pressure inside the turbine and the turbine rotational speed are held constant. Once the back plate has fully opened at approximately 29 mps, the controller begins pulsing back to the generator to limit the rotational speed of the turbine. At a wind speed in excess of 29 mps, the controller shorts the generator and brings the turbine to a complete stop. As the wind speed subsides, the controller releases the turbine and it resumes producing electricity. Data collection and instrumentation problems prevented identification of the exact speeds at which these events occur. However, the turbine, controller and generator survived winds in excess of 36 mps, confirming that the two over-speed controls accomplished their purpose. Technical Effectiveness & Economic Feasibility Maximum Electrical Output The output of electricity is maximized by the integration of an electronic controller and mechanical over-speed controls designed and tested during the course of this project. The output exceeds that of the PowerJet�s 3-bladed counterparts (see Appendix). Durability All components of the PowerJet turbine assembly�including the electronic and mechanical controls designed, manufactured and field tested during the course of this project�proved to be durable through severe weather conditions, with constant operation and no interruption in energy production. Low Cost Materials for the turbine, generator, tower, charge controllers and ancillary parts are available at reasonable prices. Fabrication of these parts is also readily available worldwide. The cost of assembling and installing the turbine is reduced because it has fewer parts and requires less labor to manufacture and assemble, making it competitively priced compared with turbines of similar output manufactured in the U.S. and Europe. The electronic controller is the unique part to be included in the turbine package. The controllers can be manufactured in reasonably-sized production runs to keep the cost below $250 each. The data logger and 24 sensors are for research only and will be unnecessary for the commercial product. Benefit To Public The PowerJet wind-electric system is designed for distributed wind generation in 3 and 4 class winds. This wind turbine meets DOE�s requirements for a quiet, durable, bird-safe turbine that eventually can be deployed as a grid-connected generator in urban and suburban settings. Results As described more fully below and illustrated in the Appendices, the goals and objectives outlined in 2060 SOPO were fully met. Electronic and mechanical controls were successfully designed, manufactured and integrated with the generator. The turbine, tower, controllers and generators operated without incident throughout the test period, surviving severe winter and summer weather conditions such as extreme temperatures, ice and sustained high winds. The electronic controls were contained in weather-proof electrical boxes and the elec

Bartlett, Raymond J

2008-11-30T23:59:59.000Z

479

Barr Engineering Statement of Methodology Rosemount Wind Turbine  

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

Barr Engineering Statement of Methodology Rosemount Wind Turbine Barr Engineering Statement of Methodology Rosemount Wind Turbine Simulations by Truescape Visual Reality, DOE/EA-1791 (May 2010) Barr Engineering Statement of Methodology Rosemount Wind Turbine Simulations by Truescape Visual Reality, DOE/EA-1791 (May 2010) Barr Engineering, Minneapolis engaged Truescape in May 2010 to: 1) Provide a series of TrueViewTM2 "human field of view" survey controlled photo simulations from pre-determined viewpoint locations to assist with the assessment of the potential visibility of a proposed turbine, and 2) Simulate two different height options for the turbine tower, being 80m vs. 100m. Barr Engineering Statement of Methodology Rosemount Wind Turbine Simulations by Truescape Visual Reality, DOE/EA-1791 (May 2010)

480

Barr Engineering Statement of Methodology Rosemount Wind Turbine  

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

Barr Engineering Statement of Methodology Rosemount Wind Turbine Barr Engineering Statement of Methodology Rosemount Wind Turbine Simulations by Truescape Visual Reality, DOE/EA-1791 (May 2010) Barr Engineering Statement of Methodology Rosemount Wind Turbine Simulations by Truescape Visual Reality, DOE/EA-1791 (May 2010) Barr Engineering, Minneapolis engaged Truescape in May 2010 to: 1) Provide a series of TrueViewTM2 "human field of view" survey controlled photo simulations from pre-determined viewpoint locations to assist with the assessment of the potential visibility of a proposed turbine, and 2) Simulate two different height options for the turbine tower, being 80m vs. 100m. Barr Engineering Statement of Methodology Rosemount Wind Turbine Simulations by Truescape Visual Reality, DOE/EA-1791 (May 2010)

Note: This page contains sample records for the topic "tall tower wind" 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

Wind turbine generator with improved operating subassemblies  

DOE Patents (OSTI)

A wind turbine includes a yaw spring return assembly to return the nacelle from a position to which it has been rotated by yawing forces, thus preventing excessive twisting of the power cables and control cables. It also includes negative coning restrainers to limit the bending of the flexible arms of the rotor towards the tower, and stop means on the rotor shaft to orient the blades in a vertical position during periods when the unit is upwind when the wind commences. A pendulum pitch control mechanism is improved by orienting the pivot axis for the pendulum arm at an angle to the longitudinal axis of its support arm, and excessive creep is of the synthetic resin flexible beam support for the blades is prevented by a restraining cable which limits the extent of pivoting of the pendulum during normal operation but which will permit further pivoting under abnormal conditions to cause the rotor to stall.

Cheney, Jr., Marvin C. (24 Stonepost Rd., Glastonbury, CT 06033)

1985-01-01T23:59:59.000Z

482

Extreme Helicity and Intense Convective Towers in Hurricane Bonnie  

Science Conference Proceedings (OSTI)

Helicity was calculated in Hurricane Bonnie (1998) using tropospheric-deep dropsonde soundings from the NASA Convection and Moisture Experiment. Large helicity existed downshear of the storm center with respect to the ambient vertical wind shear. ...

John Molinari; David Vollaro

2008-11-01T23:59:59.000Z

483

Soiling patterns on a tall limestone building: Changes over 60 years  

SciTech Connect

Soiling of limestone caused by air pollution has been studied at the Cathedral of Learning on the University of Pittsburgh campus. The Cathedral was constructed in the 1930s during a period of heavy pollution in Pittsburgh, PA. Archival photographs show that the building became soiled while it was still under construction. Reductions in air pollutant concentrations began in the late 1940s and 1950s and have continued to the present day. Concurrent with decreasing pollution, soiled areas of the stone have been slowly washed by rain, leaving a white, eroded surface. The patterns of white areas in archival photographs of the building are consistent with computer modeling of rain impingement showing greater wash off rates at higher elevations and on the corners of the building. Winds during the rainstorms are predominantly form the quadrant SW to NW at this location, and wind speeds as well as rain intensities are greater when winds are from this quadrant as compared with other quadrants; the sides of the building facing these directions are much less soiled than the opposing sides. Overall, these results suggest that rain washing of soiled areas on buildings occurs over a period of decades, in contrast to the process of soiling that occurs much more rapidly.

Davidson, C.I.; Tang, W.; Finger, S.; Etyemezian, V.; Striegel, M.F.; Sherwood, S.I.

2000-02-15T23:59:59.000Z

484

A Wind-Tunnel Study of Wind Effects on Air-Cooled Condensers  

Science Conference Proceedings (OSTI)

Due to increasing competition for fresh water supplies in the future, development of power plants that use a minimum of water is crucial. When minimizing water use in a water-constrained environment, direct dry cooling systems are a good alternative to once-through cooling systems with an evaporative wet cooling tower. The core of any direct dry cooling system is an air-cooled condenser (ACC). A number of studies have shown that wind can negatively impact ACC system performance. Based on these observati...

2011-12-15T23:59:59.000Z

485

Task 5.1:Expand the Number of Faculty Working in Wind Energy: Wind Energy Supply Chain and Logistics  

DOE Green Energy (OSTI)

Wind as a source of energy has gained a significant amount of attention because it is free and green. Construction of a wind farm involves considerable investment, which includes the cost of turbines, nacelles, and towers as well as logistical costs such as transportation of oversized parts and installation costs such as crane-rental costs. The terrain effects at the project site exert considerable influence on the turbine assembly rate and the project duration, which increases the overall installation cost. For higher capacity wind turbines (>3MW), the rental cost of the cranes is significant. In this study, the impact of interest rate, sales price of electricity, terrain effects and availability of cranes on the duration of installation and payback period for the project is analyzed. Optimization of the logistic activities involved during the construction phase of a wind farm contributes to the reduction of the project duration and also increases electricity generation during the construction phase.

Janet M Twomey, PhD

2010-04-30T23:59:59.000Z

486

Solar two: A molten salt power tower demonstration  

Science Conference Proceedings (OSTI)

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

487

Cooling Tower Energy Conservation Through Hydraulic Fan Drives  

E-Print Network (OSTI)

Many companies offer gearboxes, shafts, and couplings for cooling tower fan drives, with little or no innovation. These companies have traditionally been purchased with an emphasis on cost and not "Return on Investment!" In the past, when energy conservation or "Return on Investment" was emphasized, the only alternative was to add an expensive frequency inverter for variable speed control. This meant expensive rewiring, placing additional controls in an already crowded control room, or constructing a special building for them. However, with H.E.M.'s patented Hydraulic Fan Drive, one receives variable speed control and more efficiency for approximately the price of a mechanical drive. The new, more efficient Hydraulic Drive allows for a variable speed control and the ability to sense water temperature to control fan speed.

Dickerson, J.

1991-06-01T23:59:59.000Z

488

Energy (Cost) Savings by Zero Discharge in Cooling Towers  

E-Print Network (OSTI)

Maximum reuse of cooling tower blowdown by the incorporation of a sidestream softening system to recycle water can allow for significant savings in energy costs for industry. The system design parameters described in this paper are based upon calcium sulfate, calcium carbonate, and silica solubility equations for the resultant high ionic strength of a zero blowdown system. Operational aspects are highlighted in terms of deposition, corrosion, and biofouling potentials as well as currently-practiced, successful treatment procedures. The effects and history of corrosion and scale inhibitors, as well as other treatment chemicals, have been evaluated for numerous plants utilizing zero blowdown, and a summation of this knowledge is presented here. The cost analysis of conventional systems versus recycle systems is based upon a computer model's predictions for makeup waters of various qualities and costs.

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

1982-01-01T23:59:59.000Z

489

The evolution of magnetic tower jets in the laboratory  

E-Print Network (OSTI)

The evolution of laboratory produced magnetic jets is followed numerically through three-dimensional, non-ideal magnetohydrodynamic simulations. The experiments are designed to study the interaction of a purely toroidal field with an extended plasma background medium. The system is observed to evolve into a structure consisting of an approximately cylindrical magnetic cavity with an embedded magnetically confined jet on its axis. The supersonic expansion produces a shell of swept-up shocked plasma which surrounds and partially confines the magnetic tower. Currents initially flow along the walls of the cavity and in the jet but the development of current-driven instabilities leads to the disruption of the jet and a re-arrangement of the field and currents. The top of the cavity breaks-up and a well collimated, radiatively cooled, 'clumpy' jet emerges from the system.

A. Ciardi; S. V. Lebedev; A. Frank; E. G. Blackman; J. P. Chittenden; C. J. Jennings; D. J. Ampleford; S. N. Bland; S. C. Bott; J. Rapley; G. N. Hall; F. A. Suzuki-Vidal; A. Marocchino; T. Lery; C. Stehle

2006-11-14T23:59:59.000Z

490

Adjudication of a Contract for the Construction of the Cooling Tower Complex for the North Experimental Area  

E-Print Network (OSTI)

Adjudication of a Contract for the Construction of the Cooling Tower Complex for the North Experimental Area

1976-01-01T23:59:59.000Z

491

Wind News  

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

news Office of Energy Efficiency & Renewable news Office of Energy Efficiency & Renewable Energy Forrestal Building 1000 Independence Avenue, SW Washington, DC 20585 en New Report Shows Trend Toward Larger Offshore Wind Systems, with 11 Advanced Stage Projects Proposed in U.S. Waters http://energy.gov/eere/articles/new-report-shows-trend-toward-larger-offshore-wind-systems-11-advanced-stage-projects wind-systems-11-advanced-stage-projects" class="title-link">New Report Shows Trend Toward Larger Offshore Wind Systems, with 11 Advanced Stage Projects Proposed in U.S. Waters

492

Wind Power  

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

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 Mountains,...

493

Flue gas injection control of silica in cooling towers.  

Science Conference Proceedings (OSTI)

Injection of CO{sub 2}-laden flue gas can decrease the potential for silica and calcite scale formation in cooling tower blowdown by lowering solution pH to decrease equilibrium calcite solubility and kinetic rates of silica polymerization. Flue gas injection might best inhibit scale formation in power plant cooling towers that use impaired makeup waters - for example, groundwaters that contain relatively high levels of calcium, alkalinity, and silica. Groundwaters brought to the surface for cooling will degas CO{sub 2} and increase their pH by 1-2 units, possibly precipitating calcite in the process. Recarbonation with flue gas can lower the pHs of these fluids back to roughly their initial pH. Flue gas carbonation probably cannot lower pHs to much below pH 6 because the pHs of impaired waters, once outgassed at the surface, are likely to be relatively alkaline. Silica polymerization to form scale occurs most rapidly at pH {approx} 8.3 at 25 C; polymerization is slower at higher and lower pH. pH 7 fluids containing {approx}220 ppm SiO{sub 2} require > 180 hours equilibration to begin forming scale whereas at pH 8.3 scale formation is complete within 36 hours. Flue gas injection that lowers pHs to {approx} 7 should allow substantially higher concentration factors. Periodic cycling to lower recoveries - hence lower silica concentrations - might be required though. Higher concentration factors enabled by flue gas injection should decrease concentrate volumes and disposal costs by roughly half.

Brady, Patrick Vane; Anderson, Howard L., Jr.; Altman, Susan Jeanne

2011-06-01T23:59:59.000Z

494

Radiometric Modeling of Mechanical Draft Cooling Towers to Assist in the Extraction of their Absolute Temperature from  

E-Print Network (OSTI)

Radiometric Modeling of Mechanical Draft Cooling Towers to Assist in the Extraction108, Aiken, SC, USA ABSTRACT Determining the internal temperature of a mechanical draft cooling tower is to estimate the temperature of the air exiting a mechanical draft cooling tower (MDCT) through the use

Salvaggio, Carl

495

A case history of a coal gasification wastewater cooling tower at the Great Plains coal gasification project  

SciTech Connect

This paper describes the conceptual process design of the Great Plains cooling water system, the fouling history of the cooling tower, and the results of the design modifications. In addition, general design guidelines for future wastewater reuse cooling towers are recommended. By following these guidelines, design engineers can minimize the risk of fouling that could impair a wastewater cooling tower's thermal performance.

Crocker, B.R.; Bromel, M.C.; Pontbriand, M.W.

1987-01-01T23:59:59.000Z

496

New England Wind Forum: Wind Power Technology  

Wind Powering America (EERE)

Wind Power Technology Wind Power Technology Modern wind turbines have become sophisticated power plants while the concept of converting wind energy to electrical energy remains quite simple. Follow these links to learn more about the science behind wind turbine technology. Wind Power Animation An image of a scene from the wind power animation. The animation shows how moving air rotates a wind turbine's blades and describes how the internal components work to produce electricity. It shows small and large wind turbines and the differences between how they are used, as stand alone or connected to the utility grid. How Wind Turbines Work Learn how wind turbines make electricity; what are the types, sizes, and applications of wind turbines; and see an illustration of the components inside a wind turbine.