Sample records for marine turbine cormat

  1. A new generation of marine turbine that can harness energy from the sea is being developed by Nautricity,

    E-Print Network [OSTI]

    Mottram, Nigel

    A new generation of marine turbine that can harness energy from the sea is being developed to develop the concept of this unique contra rotating tidal turbine (CoRMaT). The first fully functional conventional turbines, the CoRMaT design uses two rotors which turn in opposite directions, making it extremely

  2. MHK Projects/Contra Rotating Marine Turbine CoRMaT | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf KilaueaInformation Other4Q07)AKBrough HeadCentrevilleInformation

  3. Comparison of PMSG and DFIG for Marine Current Turbine Applications

    E-Print Network [OSTI]

    Boyer, Edmond

    Comparison of PMSG and DFIG for Marine Current Turbine Applications S. Benelghali, M.E.H. Benbouzid and J.F. Charpentier Abstract--Emerging technologies for marine current turbine are mainly relevant to works that have been carried out on wind turbines and ship propellers. It is then obvious that many

  4. Power Smoothing Control in a Grid-Connected Marine Current Turbine System for Compensating

    E-Print Network [OSTI]

    Boyer, Edmond

    similar principles in wind generation systems can be applied in marine current turbine (MCT) systems due

  5. A Comparative Study of Modular Axial Flux Podded Generators for Marine Current Turbines

    E-Print Network [OSTI]

    Brest, Université de

    A Comparative Study of Modular Axial Flux Podded Generators for Marine Current Turbines Sofiane turbines (MCTs). Due to the submarine environment, maintenance operations are very hard, very costly current turbine, axial flux permanent magnet generator, design, optimization. Nomenclature MCT = Marine

  6. A Fault-Tolerant Multiphase Permanent Magnet Generator for Marine Current Turbine Applications

    E-Print Network [OSTI]

    Boyer, Edmond

    A Fault-Tolerant Multiphase Permanent Magnet Generator for Marine Current Turbine Applications on offshore wind turbine systems. Marine current turbines are characterized by a very difficult access feature. This paper deals with the use of a PM multiphase marine current turbine generator. With this kind

  7. High-Order Sliding Mode Control of DFIG-Based Marine Current Turbine

    E-Print Network [OSTI]

    Brest, Université de

    High-Order Sliding Mode Control of DFIG-Based Marine Current Turbine S.E. Ben Elghali1 , M-based marine current turbine. Indeed, to increase the generated power and therefore the efficiency of a marine current turbine, a nonlinear controller has been proposed. DFIG has been already considered for similar

  8. High-Order Sliding Mode Control of a Marine Current Turbine

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    High-Order Sliding Mode Control of a Marine Current Turbine Driven Permanent Magnet Synchronous of a Permanent Magnet Synchronous Generator (PMSG)-based Marine Current Turbine (MCT). Indeed, to increase been already considered for similar applications particularly wind turbine systems using mainly PI

  9. Energetics of Marine Turbine Arrays - Extraction, Dissipation and Diminution

    E-Print Network [OSTI]

    Nishino, Takafumi

    2013-01-01T23:59:59.000Z

    A two-scale modelling approach is discussed to predict the performance and energetics of a large number (more than a few hundred) of marine turbines installed as a power farm in a general coastal environment. The kernel of this approach is that the outer (coastal-scale) model/simulation is to assess the reduction of flow passing through a given farm area as a function of the increase of head loss across the farm, whereas the inner (device-scale) model/simulation uses this function to account for the (otherwise unknown) effect of coastal dynamics for that farm site. Large-eddy simulations (LES) of periodic open channel flow (with a porous plate model representing turbines) are then presented as the device-scale part of such a two-scale model of large marine turbine arrays. Results demonstrate how the energetics of turbine arrays (i.e. extraction, dissipation and diminution of energy in the entire farm area) may change depending on the characteristics of the farm site, array configuration and operating conditio...

  10. Power Smoothing and Limitation Control of a PMSG-Based Marine Current Turbine under Swell Waves

    E-Print Network [OSTI]

    Boyer, Edmond

    Power Smoothing and Limitation Control of a PMSG-Based Marine Current Turbine under Swell Waves la puissance maximale (MPPT) nécessiterait d'accélérer ou de décélérer fréquemment la turbine à par une turbine marine associée à un générateur synchrone à aimants permanents (GSAP). Un algorithme

  11. 554 IEEE JOURNAL OF OCEANIC ENGINEERING, VOL. 37, NO. 3, JULY 2012 Generator Systems for Marine Current Turbine

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Current Turbine Applications: A Comparative Study Seifeddine Benelghali, Member, IEEE, Mohamed El Hachemi for marine current turbines are mainly related to works that have been carried out on wind turbines and ship turbines. As in the wind turbine context, doubly-fed induction generators and permanent magnet generators

  12. 118 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 58, NO. 1, JANUARY 2011 Experimental Validation of a Marine Current Turbine

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Validation of a Marine Current Turbine Simulator: Application to a Permanent Magnet Synchronous Generator-Simulink simulation tool of marine current turbine (MCT) systems. The developed simulator is intended to be used proposed. PMSG has been already considered for similar ap- plications, particularly wind turbine systems

  13. Zhiyu Jiang, Department of Marine Technology & Centre for Ships and Ocean Structures Dynamic response of wind turbines in fault and

    E-Print Network [OSTI]

    Nřrvĺg, Kjetil

    response of wind turbines in fault and shutdown conditions Zhiyu Jiang Deptartment of Marine Technology://www.newscientist.com/blogs/onepercent/2011/12/why-did-a-wind-turbine-self-co.html #12;3 Zhiyu Jiang, Department of Marine Technology & Centre & Centre for Ships and Ocean Structures Control and protection of wind turbines Emergency shutdown Pitch

  14. The development of CACTUS : a wind and marine turbine performance simulation code.

    SciTech Connect (OSTI)

    Barone, Matthew Franklin; Murray, Jonathan

    2010-12-01T23:59:59.000Z

    CACTUS (Code for Axial and Cross-flow TUrbine Simulation) is a turbine performance simulation code, based on a free wake vortex method, under development at Sandia National Laboratories (SNL) as part of a Department of Energy program to study marine hydrokinetic (MHK) devices. The current effort builds upon work previously done at SNL in the area of vertical axis wind turbine simulation, and aims to add models to handle generic device geometry and physical models specific to the marine environment. An overview of the current state of the project and validation effort is provided.

  15. Energy Storage Technologies for Smoothing Power Fluctuations in Marine Current Turbines

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Energy Storage Technologies for Smoothing Power Fluctuations in Marine Current Turbines Zhibin Zhou the marine current generation system more reliable, energy storage systems will play a crucial role. In this paper, the power fluctuation phenomenon is described and the state of art of energy storage technologies

  16. Power Limitation Control for a PMSG-Based Marine Current Turbine at High Tidal Speed and

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Power Limitation Control for a PMSG-Based Marine Current Turbine at High Tidal Speed and Strong Sea the generator power at rated value. In this paper, two power limitation strategies with flux-weakening control by the power limitation and the rotor speed; this method enables to control the generator power at the limited

  17. Numerical and experimental study of the interaction between two marine current turbines

    E-Print Network [OSTI]

    Mycek, Paul; Germain, Grégory; Pinon, Grégory; Rivoalen, Elie

    2013-01-01T23:59:59.000Z

    The understanding of interaction effects between marine energy converters represents the next step in the research process that should eventually lead to the deployment of such devices. Although some a priori considerations have been suggested recently, very few real condition studies have been carried out concerning this issue. Trials were run on 1/30th scale models of three-bladed marine current turbine prototypes in a flume tank. The present work focuses on the case where a turbine is placed at different locations in the wake of a first one. The interaction effects in terms of performance and wake of the second turbine are examined and compared to the results obtained on the case of one single turbine. Besides, a three-dimensional software, based on a vortex method is currently being developed, and will be used in the near future to model more complex layouts. The experimental study shows that the second turbine is deeply affected by the presence of an upstream device and that a compromise between individu...

  18. Simulating Blade-Strike on Fish passing through Marine Hydrokinetic Turbines

    SciTech Connect (OSTI)

    Romero Gomez, Pedro DJ; Richmond, Marshall C.

    2014-06-16T23:59:59.000Z

    The study reported here evaluated the occurrence, frequency, and intensity of blade strike of fish on an axial-flow marine hydrokinetic turbine by using two modeling approaches: a conventional kinematic formulation and a proposed Lagrangian particle- based scheme. The kinematic model included simplifying assumptions of fish trajectories such as distribution and velocity. The proposed method overcame the need for such simplifications by integrating the following components into a computational fluid dynamics (CFD) model: (i) advanced eddy-resolving flow simulation, (ii) generation of ambient turbulence based on field data, (iii) moving turbine blades in highly transient flows, and (iv) Lagrangian particles to mimic the potential fish pathways. The test conditions to evaluate the blade-strike probability and fish survival rate were: (i) the turbulent environment, (ii) the fish size, and (iii) the approaching flow velocity. The proposed method offered the ability to produce potential fish trajectories and their interaction with the rotating turbine. Depending upon the scenario, the percentile of particles that registered a collision event ranged from 6% to 19% of the released sample size. Next, by using a set of experimental correlations of the exposure-response of living fish colliding with moving blades, the simulated collision data were used as input variables to estimate the survival rate of fish passing through the operating turbine. The resulting survival rates were greater than 96% in all scenarios, which is comparable to or better than known survival rates for conventional hydropower turbines. The figures of strike probability and mortality rate were amplified by the kinematic model. The proposed method offered the advantage of expanding the evaluation of other mechanisms of stress and injury on fish derived from hydrokinetic turbines and related devices.

  19. Investigating the Influence of the Added Mass Effect to Marine Hydrokinetic Horizontal-Axis Turbines Using a General Dynamic Wake Wind Turbine Code

    SciTech Connect (OSTI)

    Maniaci, D. C.; Li, Y.

    2011-10-01T23:59:59.000Z

    This paper describes a recent study to investigate the applicability of a horizontal-axis wind turbine (HAWT) structural dynamics and unsteady aerodynamics analysis program (FAST and AeroDyn respectively) to modeling the forces on marine hydrokinetic (MHK) turbines. This paper summarizes the added mass model that has been added to AeroDyn. The added mass model only includes flow acceleration perpendicular to the rotor disc, and ignores added mass forces caused by blade deflection. A model of the National Renewable Energy Laboratory's (NREL) Unsteady Aerodynamics Experiment (UAE) Phase VI wind turbine was analyzed using FAST and AeroDyn with sea water conditions and the new added mass model. The results of this analysis exhibited a 3.6% change in thrust for a rapid pitch case and a slight change in amplitude and phase of thrust for a case with 30{sup o} of yaw.

  20. Investigating the Influence of the Added Mass Effect to Marine Hydrokinetic Horizontal-Axis Turbines Using a General Dynamic Wake Wind Turbine Code: Preprint

    SciTech Connect (OSTI)

    Maniaci, D. C.; Li, Y.

    2012-04-01T23:59:59.000Z

    This paper describes a recent study to investigate the applicability of a horizontal-axis wind turbine (HAWT) structural dynamics and unsteady aerodynamics analysis program (FAST and AeroDyn respectively) to modeling the forces on marine hydrokinetic (MHK) turbines. It summarizes the added mass model that has been added to AeroDyn. The added mass model only includes flow acceleration perpendicular to the rotor disc, and ignores added mass forces caused by blade deflection. A model of the National Renewable Energy Laboratory's (NREL) Unsteady Aerodynamics Experiment (UAE) Phase VI wind turbine was analyzed using FAST and AeroDyn with sea water conditions and the new added mass model. The results of this analysis exhibited a 3.6% change in thrust for a rapid pitch case and a slight change in amplitude and phase of thrust for a case with 30 degrees of yaw.

  1. Turbines

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Information Advanced Research The American Recovery and Reinvestment Act (ARRA) funds gas turbine technology research and development to improve the efficiency, emissions, and...

  2. Effects of Tidal Turbine Noise on Fish Hearing and Tissues - Draft Final Report - Environmental Effects of Marine and Hydrokinetic Energy

    SciTech Connect (OSTI)

    Halvorsen, Michele B.; Carlson, Thomas J.; Copping, Andrea E.

    2011-09-30T23:59:59.000Z

    Snohomish Public Utility District No.1 plans to deploy two 6 meter OpenHydro tidal turbines in Admiralty Inlet in Puget Sound, under a FERC pilot permitting process. Regulators and stakeholders have raised questions about the potential effect of noise from the turbines on marine life. Noise in the aquatic environment is known to be a stressor to many types of aquatic life, including marine mammals, fish and birds. Marine mammals and birds are exceptionally difficult to work with for technical and regulatory reasons. Fish have been used as surrogates for other aquatic organisms as they have similar auditory structures. This project was funded under the FY09 Funding Opportunity Announcement (FOA) to Snohomish PUD, in partnership with the University of Washington - Northwest National Marine Renewable Energy Center, the Sea Mammal Research Unit, and Pacific Northwest National Laboratory. The results of this study will inform the larger research project outcomes. Proposed tidal turbine deployments in coastal waters are likely to propagate noise into nearby waters, potentially causing stress to native organisms. For this set of experiments, juvenile Chinook salmon (Oncorhynchus tshawytscha) were used as the experimental model. Plans exist for prototype tidal turbines to be deployed into their habitat. Noise is known to affect fish in many ways, such as causing a threshold shift in auditory sensitivity or tissue damage. The characteristics of noise, its spectra and level, are important factors that influence the potential for the noise to injure fish. For example, the frequency range of the tidal turbine noise includes the audiogram (frequency range of hearing) of most fish. This study was performed during FY 2011 to determine if noise generated by a 6-m diameter OpenHydro turbine might affect juvenile Chinook salmon hearing or cause barotrauma. Naturally spawning stocks of Chinook salmon that utilize Puget Sound are listed as threatened (http://www.nwr.noaa.gov/ESA-Salmon-Listings/Salmon-Populations/Chinook/CKPUG.cfm); the fish used in this experiment were hatchery raised and their populations are not in danger of depletion. After they were exposed to simulated tidal turbine noise, the hearing of juvenile Chinook salmon was measured and necropsies performed to check for tissue damage. Experimental groups were (1) noise exposed, (2) control (the same handling as treatment fish but without exposure to tidal turbine noise), and (3) baseline (never handled). Experimental results indicate that non-lethal, low levels of tissue damage may have occurred but that there were no effects of noise exposure on the auditory systems of the test fish.

  3. OVERLAY COATINGS FOR GAS TURBINE AIRFOILS

    E-Print Network [OSTI]

    Boone, Donald H.

    2013-01-01T23:59:59.000Z

    R. Krutenat, Gas Turbine Materials Conference Proceedings,Conference on Gas Turbine Materials in a Marine Environment,in developing new turbine materials, coatings and processes,

  4. Marine Hydrokinetic Turbine Power-Take-Off Design for Optimal Performance and Low Impact on Cost-of-Energy: Preprint

    SciTech Connect (OSTI)

    Beam, M.; Kline, B.; Elbing, B.; Straka, W.; Fontaine, A.; Lawson, M.; Li, Y.; Thresher, R.; Previsic, M.

    2012-04-01T23:59:59.000Z

    Marine hydrokinetic devices are becoming a popular method for generating marine renewable energy worldwide. These devices generate electricity by converting the kinetic energy of moving water, wave motion or currents, into electrical energy through the use of a Power-Take-Off (PTO) system. Most PTO systems incorporate a mechanical or hydraulic drive train, power generator and electric control/conditioning system to deliver the generated electric power to the grid at the required state. Like wind turbine applications, the PTO system must be designed for high reliability, good efficiency, and long service life with reasonable maintenance requirements, low cost and an appropriate mechanical design for anticipated applied steady and unsteady loads. The ultimate goal of a PTO design is high efficiency, low maintenance and cost with a low impact on the device Cost-of-Energy (CoE).

  5. Marine Hydrokinetic Turbine Power-Take-Off Design for Optimal Performance and Low Impact on Cost-of-Energy: Preprint

    SciTech Connect (OSTI)

    Beam, M.; Kline, B.; Elbing, B.; Straka, W.; Fontaine, A.; Lawson, M.; Li, Y.; Thresher, R.; Previsic, M.

    2013-02-01T23:59:59.000Z

    Marine hydrokinetic devices are becoming a popular method for generating marine renewable energy worldwide. These devices generate electricity by converting the kinetic energy of moving water, wave motion or currents, into electrical energy through the use of a power-take-off (PTO) system. Most PTO systems incorporate a mechanical or hydraulic drivetrain, power generator, and electric control/conditioning system to deliver the generated electric power to the grid at the required state. Like wind turbine applications, the PTO system must be designed for high reliability, good efficiency, and long service life with reasonable maintenance requirements, low cost, and an appropriate mechanical design for anticipated applied steady and unsteady loads. The ultimate goal of a PTO design is high efficiency and low maintenance and cost, with a low impact on the device cost-of-energy (CoE).

  6. Sandia National Laboratories: Investigations on Marine Hydrokinetic...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ClimateECEnergyInvestigations on Marine Hydrokinetic Turbine Foil Structural Health Monitoring Presented at GMREC METS Investigations on Marine Hydrokinetic Turbine Foil Structural...

  7. Numerical and Experimental Study of the Interaction between two Marine Current Turbines

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Government announced its approval for a 10MW tidal power array project on Scotland's west coast. It would between marine energy converters represents the next step in the research process that should eventually of marine energy converters with the launching of several large-scale projects. For instance, India plans

  8. Numerical and Experimental Study of the Interaction Between Two Marine Current Turbines

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , the Scottish Government announced its approval for a 10MW tidal power array project on Scotland's west coast.rivoalen@insa-rouen.fr Abstract--The understanding of interaction effects between marine energy converters represents the next reached in the deployment of marine energy converters with the launching of several large-scale projects

  9. A Systemic Design Methodology of PM Generators for Fixed-Pitch Marine Current Turbines

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    that for an offshore application and particularly for tidal power generation, enhancing reliability and reducing of permanent magnet (PM) generator associated with fixed-pitch turbine for tidal energy generation. The main of the drive-train. In offshore energy generation, the maintenance should be minimized as much as possible

  10. axis tidal turbines: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    8 Power Limitation Control for a PMSG-Based Marine Current Turbine at High Tidal Speed and Physics Websites Summary: Power Limitation Control for a PMSG-Based Marine Current...

  11. Performance Comparison of Three-and Five-Phase Permanent Magnet Generators for Marine Current

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Turbine Applications Under Open-Circuit Faults Seifeddine Benelghali, Fatiha Mekri, Mohamed Benbouzid a marine current turbine and compared to a classical three-phase generator. For both topologies, a robust generators key features marine applications. Index Terms--Marine Current Turbine MCT), five-phase Permanent

  12. Simulation of electricity supply of an Atlantic island by offshore wind turbines and wave

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Simulation of electricity supply of an Atlantic island by offshore wind turbines and wave energy an electricity storage for a 5000 inhabitants island supplied by both marine renewables (offshore wind and waves community. Key words: Wave energy, offshore wind turbines, marine energy 1 Introduction Marine renewables

  13. Technological cost%3CU%2B2010%3Ereduction pathways for axial%3CU%2B2010%3Eflow turbines in the marine hydrokinetic environment.

    SciTech Connect (OSTI)

    Laird, Daniel L.; Johnson, Erick L.; Ochs, Margaret Ellen; Boren, Blake [Oregon State University, Corvallis, OR

    2013-05-01T23:59:59.000Z

    This report considers and prioritizes potential technical costreduction pathways for axialflow turbines designed for tidal, river, and ocean current resources. This report focuses on technical research and development costreduction pathways related to the device technology rather than environmental monitoring or permitting opportunities. Three sources of information were utilized to understand current cost drivers and develop a list of potential costreduction pathways: a literature review of technical work related to axialflow turbines, the U.S. Department of Energy Reference Model effort, and informal webinars and other targeted interactions with industry developers. Data from these various information sources were aggregated and prioritized with respect to potential impact on the lifetime levelized cost of energy. The four most promising costreduction pathways include structural design optimization; improved deployment, maintenance, and recovery; system simplicity and reliability; and array optimization.

  14. Basic Integrative Models for Offshore Wind Turbine Systems

    E-Print Network [OSTI]

    Aljeeran, Fares

    2012-07-16T23:59:59.000Z

    This research study developed basic dynamic models that can be used to accurately predict the response behavior of a near-shore wind turbine structure with monopile, suction caisson, or gravity-based foundation systems. The marine soil conditions...

  15. Aeroderivative Gas Turbines Can Meet Stringent NOx Control Requirements

    E-Print Network [OSTI]

    Keller, S. C.; Studniarz, J. J.

    AERODERIVATIVE GAS TURBINES CAN MEET STRINGENT NOx CONTROL REQUIREMENTS S. C. Keller, Manager Cogeneration Sales & Market Development General Electric Company Marine & Industrial Engines Cincinnati, Ohio ABSTRACT Gas Turbines operating... in the United States are required to meet federally mandated emission standards. This article will discuss how General Electric's 1M industrial aeroderivative gas turbines are meeting NOx requirements as low as 25 parts per ~tllion usi-ng steam injection...

  16. Simulating Collisions for Hydrokinetic Turbines

    SciTech Connect (OSTI)

    Richmond, Marshall C.; Romero Gomez, Pedro DJ; Rakowski, Cynthia L.

    2013-10-01T23:59:59.000Z

    Evaluations of blade-strike on an axial-flow Marine Hydrokinetic turbine were conducted using a conventional methodology as well as an alternative modeling approach proposed in the present document. The proposed methodology integrates the following components into a Computa- tional Fluid Dynamics (CFD) model: (i) advanced eddy-resolving flow simulations, (ii) ambient turbulence based on field data, (iii) moving turbine blades in highly transient flows, and (iv) Lagrangian particles to mimic the potential fish pathways. The sensitivity of blade-strike prob- ability to the following conditions was also evaluated: (i) to the turbulent environment, (ii) to fish size and (iii) to mean stream flow velocity. The proposed methodology provided fraction of collisions and offered the capability of analyzing the causal relationships between the flow envi- ronment and resulting strikes on rotating blades. Overall, the conventional methodology largely overestimates the probability of strike, and lacks the ability to produce potential fish and aquatic biota trajectories as they interact with the rotating turbine. By using a set of experimental corre- lations of exposure-response of living fish colliding on moving blades, the occurrence, frequency and intensity of the particle collisions was next used to calculate the survival rate of fish crossing the MHK turbine. This step indicated survival rates always greater than 98%. Although the proposed CFD framework is computationally more expensive, it provides the advantage of evaluating multiple mechanisms of stress and injury of hydrokinetic turbine devices on fish.

  17. Wind turbine

    DOE Patents [OSTI]

    Cheney, Jr., Marvin C. (Glastonbury, CT)

    1982-01-01T23:59:59.000Z

    A wind turbine of the type having an airfoil blade (15) mounted on a flexible beam (20) and a pitch governor (55) which selectively, torsionally twists the flexible beam in response to wind turbine speed thereby setting blade pitch, is provided with a limiter (85) which restricts unwanted pitch change at operating speeds due to torsional creep of the flexible beam. The limiter allows twisting of the beam by the governor under excessive wind velocity conditions to orient the blades in stall pitch positions, thereby preventing overspeed operation of the turbine. In the preferred embodiment, the pitch governor comprises a pendulum (65,70) which responds to changing rotor speed by pivotal movement, the limiter comprising a resilient member (90) which engages an end of the pendulum to restrict further movement thereof, and in turn restrict beam creep and unwanted blade pitch misadjustment.

  18. Steam Turbine Cogeneration 

    E-Print Network [OSTI]

    Quach, K.; Robb, A. G.

    2008-01-01T23:59:59.000Z

    Steam turbines are widely used in most industrial facilities because steam is readily available and steam turbine is easy to operate and maintain. If designed properly, a steam turbine co-generation (producing heat and power simultaneously) system...

  19. Single Rotor Turbine

    DOE Patents [OSTI]

    Platts, David A. (Los Alamos, NM)

    2004-10-26T23:59:59.000Z

    A rotor for use in turbine applications has a centrifugal compressor having axially disposed spaced apart fins forming passages and an axial turbine having hollow turbine blades interleaved with the fins and through which fluid from the centrifugal compressor flows.

  20. Economical Condensing Turbines

    E-Print Network [OSTI]

    Dean, J. E.

    1997-01-01T23:59:59.000Z

    Steam turbines have long been used at utilities and in industry to generate power. There are three basic types of steam turbines: condensing, letdown and extraction/condensing. • Letdown turbines reduce the pressure of the incoming steam to one...

  1. Steam Turbine Cogeneration

    E-Print Network [OSTI]

    Quach, K.; Robb, A. G.

    2008-01-01T23:59:59.000Z

    Steam turbines are widely used in most industrial facilities because steam is readily available and steam turbine is easy to operate and maintain. If designed properly, a steam turbine co-generation (producing heat and power simultaneously) system...

  2. SUMTIME-MOUSAM: Configurable Marine Weather Forecast Generator Somayajulu G. Sripada and Ehud Reiter

    E-Print Network [OSTI]

    Sripada, Yaji

    turbines and neonatal intensive care unit (NICU). In the domain of gas turbines we are working on summarizing sensor data from an op- erational gas turbine (Yu et. al., 2003) for the maintenance engineersSUMTIME-MOUSAM: Configurable Marine Weather Forecast Generator Somayajulu G. Sripada and Ehud

  3. SUMTIME-MOUSAM: Configurable Marine Weather Forecast Generator Somayajulu G. Sripada and Ehud Reiter

    E-Print Network [OSTI]

    Reiter, Ehud

    turbines and neonatal intensive care unit (NICU). In the domain of gas turbines we are working on summarizing sensor data from an opera- tional gas turbine (Yu et. al., 2003) for the maintenance engineersSUMTIME-MOUSAM: Configurable Marine Weather Forecast Generator Somayajulu G. Sripada and Ehud

  4. Energy 101: Wind Turbines

    ScienceCinema (OSTI)

    None

    2013-05-29T23:59:59.000Z

    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.

  5. Energy 101: Wind Turbines

    SciTech Connect (OSTI)

    None

    2011-01-01T23:59:59.000Z

    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.

  6. 36 AUGUST | 2011 EnhancEd TurbinE

    E-Print Network [OSTI]

    Kusiak, Andrew

    36 AUGUST | 2011 EnhancEd TurbinE PErformancE moniToring comPonEnTs of wind TurbinEs are affected by asymmetric loads, variable wind speeds, and se- vere weather conditions which cause wind turbines to change their states. A typical wind turbine under- goes various states during its daily operations. The wind turbine

  7. Turbine FAQs

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron Spin Transition in2,EHSS A-Zand Analysis Utilities (TAU)Tuning ofTurbine

  8. Marine Current Turbines Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:LandownersLuther,Jemez PuebloManteca,Marana,Maries County,Marina del

  9. Economical Condensing Turbines?

    E-Print Network [OSTI]

    Dean, J. E.

    Economical Condensing Turbines? by J.E.Dean, P.E. Steam turbines have long been used at utilities and in industry to generate power. There are three basic types of steam turbines: condensing, letdown 1 and extraction/condensing. ? Letdown... turbines reduce the pressure of the incoming steam to one or more pressures and generate power very efficiently, assuming that all the letdown steam has a use. Two caveats: ? Letdown turbines produce power based upon steam requirements and not based upon...

  10. Effects of Tidal Turbine Noise on Fish Task 2.1.3.2: Effects on Aquatic Organisms: Acoustics/Noise - Fiscal Year 2011 - Progress Report - Environmental Effects of Marine and Hydrokinetic Energy

    SciTech Connect (OSTI)

    Halvorsen, Michele B.; Carlson, Thomas J.; Copping, Andrea E.

    2011-09-30T23:59:59.000Z

    Naturally spawning stocks of Chinook salmon (Oncorhynchus tshawytscha) that utilize Puget Sound are listed as threatened (http://www.nwr.noaa.gov/ESA-Salmon-Listings/Salmon-Populations/ Chinook/CKPUG.cfm). Plans exist for prototype tidal turbines to be deployed into their habitat. Noise is known to affect fish in many ways, such as causing a threshold shift in auditory sensitivity or tissue damage. The characteristics of noise, its spectra and level, are important factors that influence the potential for the noise to injure fish. For example, the frequency range of the tidal turbine noise includes the audiogram (frequency range of hearing) of most fish. This study (Effects on Aquatic Organisms, Subtask 2.1.3.2: Acoustics) was performed during FY 2011 to determine if noise generated by a 6-m-diameter open-hydro turbine might affect juvenile Chinook salmon hearing or cause barotrauma. After they were exposed to simulated tidal turbine noise, the hearing of juvenile Chinook salmon was measured and necropsies performed to check for tissue damage. Experimental groups were (1) noise exposed, (2) control (the same handling as treatment fish but without exposure to tidal turbine noise), and (3) baseline (never handled). Preliminary results indicate that low levels of tissue damage may have occurred but that there were no effects of noise exposure on the auditory systems of the test fish.

  11. Submersible Generator for Marine Hydrokinetics

    SciTech Connect (OSTI)

    Robert S. Cinq-Mars; Timothy Burke; Dr. James Irish; Brian Gustafson; Dr. James Kirtley; Dr. Aiman Alawa

    2011-09-01T23:59:59.000Z

    A submersible generator was designed as a distinct and critical subassembly of marine hydrokinetics systems, specifically tidal and stream energy conversion. The generator is designed to work with both vertical and horizontal axis turbines. The final product is a high-pole-count, radial-flux, permanent magnet, rim mounted generator, initially rated at twenty kilowatts in a two-meter-per-second flow, and designed to leverage established and simple manufacturing processes. The generator was designed to work with a 3 meter by 7 meter Gorlov Helical Turbine or a marine hydrokinetic version of the FloDesign wind turbine. The team consisted of experienced motor/generator design engineers with cooperation from major US component suppliers (magnetics, coil winding and electrical steel laminations). Support for this effort was provided by Lucid Energy Technologies and FloDesign, Inc. The following tasks were completed: � Identified the conditions and requirements for MHK generators. � Defined a methodology for sizing and rating MHK systems. � Selected an MHK generator topology and form factor. � Completed electromechanical design of submersible generator capable of coupling to multiple turbine styles. � Investigated MHK generator manufacturing requirements. � Reviewed cost implications and financial viability. � Completed final reporting and deliverables

  12. Foam Cleaning of Steam Turbines 

    E-Print Network [OSTI]

    Foster, C.; Curtis, G.; Horvath, J. W.

    2000-01-01T23:59:59.000Z

    The efficiency and power output of a steam turbine can be dramatically reduced when deposits form on the turbine blades. Disassembly and mechanical cleaning of the turbine is very time consuming and costly. Deposits can be removed from the turbine...

  13. Foam Cleaning of Steam Turbines

    E-Print Network [OSTI]

    Foster, C.; Curtis, G.; Horvath, J. W.

    The efficiency and power output of a steam turbine can be dramatically reduced when deposits form on the turbine blades. Disassembly and mechanical cleaning of the turbine is very time consuming and costly. Deposits can be removed from the turbine...

  14. Design and implementation of a marine animal alert system to support Marine Renewable Energy

    SciTech Connect (OSTI)

    Deng, Zhiqun; Carlson, Thomas J.; Fu, Tao; Ren, Huiying; Martinez, Jayson J.; Myers, Joshua R.; Matzner, Shari; Choi, Eric Y.; Copping, Andrea E.

    2013-08-08T23:59:59.000Z

    Power extracted from fast moving tidal currents has been identified as a potential commercial-scale source of renewable energy. Device developers and utilities are pursuing deployment of prototype tidal turbines to assess technology viability, site feasibility, and environmental interactions. Deployment of prototype turbines requires permits from a range of regulatory authorities. Ensuring the safety of marine animals, particularly those under protection of the Endangered Species Act of 1973 (ESA) and the Marine Mammal Protection Act of 1972 has emerged as a key regulatory challenge for initial MHK deployments. The greatest perceived risk to marine animals is from strike by the rotating blades of tidal turbines. Development of the marine mammal alert system (MAAS) was undertaken to support monitoring and mitigation requirements for tidal turbine deployments. The prototype system development focused on Southern Resident killer whales (SRKW), an endangered population of killer whales that frequents Puget Sound and is intermittently present in the part of the sound where deployment of prototype tidal turbines is being considered. Passive acoustics were selected as the primary means because of the vocal nature of these animals. The MAAS passive acoustic system consists of two-stage process involving the use of an energy detector and a spectrogram-based classifier to distinguish between SKRW’s calls and noise. A prototype consisting of two 2D symmetrical star arrays separated by 20 m center to center was built and evaluated in the waters of Sequim Bay using whale call playback.

  15. Sandia Energy - Simulating Turbine-Turbine Interaction

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of wind-turbine wakes within a turbulent atmospheric boundary layer using a large eddy simulation (LES) method. Current and ongoing work aims to leverage the simulation...

  16. Wind Turbines Benefit Crops

    ScienceCinema (OSTI)

    Takle, Gene

    2013-03-01T23:59:59.000Z

    Ames Laboratory associate scientist Gene Takle talks about research into the effect of wind turbines on nearby crops. Preliminary results show the turbines may have a positive effect by cooling and drying the crops and assisting with carbon dioxide uptake.

  17. Wind Turbines Benefit Crops

    SciTech Connect (OSTI)

    Takle, Gene

    2010-01-01T23:59:59.000Z

    Ames Laboratory associate scientist Gene Takle talks about research into the effect of wind turbines on nearby crops. Preliminary results show the turbines may have a positive effect by cooling and drying the crops and assisting with carbon dioxide uptake.

  18. Wind Turbine Competition Introduction

    E-Print Network [OSTI]

    Wang, Xiaorui "Ray"

    Wind Turbine Competition Introduction: The Society of Hispanic Professional Engineers, SHPE at UTK, wishes to invite you to participate in our first `Wind Turbine' competition as part of Engineer's Week). You will be evaluated by how much power your wind turbine generates at the medium setting of our fan

  19. Sliding vane geometry turbines

    DOE Patents [OSTI]

    Sun, Harold Huimin; Zhang, Jizhong; Hu, Liangjun; Hanna, Dave R

    2014-12-30T23:59:59.000Z

    Various systems and methods are described for a variable geometry turbine. In one example, a turbine nozzle comprises a central axis and a nozzle vane. The nozzle vane includes a stationary vane and a sliding vane. The sliding vane is positioned to slide in a direction substantially tangent to an inner circumference of the turbine nozzle and in contact with the stationary vane.

  20. Combined Cycle Combustion Turbines

    E-Print Network [OSTI]

    Combined Cycle Combustion Turbines Steven Simmons February 27 2014 1 #12;CCCT Today's Discussion 1 Meeting Pricing of 4 advanced units using information from Gas Turbine World Other cost estimates from E E3 EIA Gas Turbine World California Energy Commission Date 2010 Oct 2012, Dec 2013 Apr 2013 2013 Apr

  1. How France is going to catch up on marine renewable technologies?

    E-Print Network [OSTI]

    Canet, LĂ©onie

    turbines Wind Heat pump & Air conditionning Temperature Osmotic energy Salt Marine energies THE FULL SET Martinique project Surface water pump Deep water pipes Mooring lines #12;Air-conditioning & heat pump

  2. Near wake properties of horizontal axis marine current L. Myers and A.S. Bahaj

    E-Print Network [OSTI]

    Quartly, Graham

    1 Near wake properties of horizontal axis marine current turbines L. Myers and A.S. Bahaj-scale horizontal axis turbine has been have been measured in a large water channel facility. A downstream map with different vertical shear and turbulence distributions. Offshore wind farms are perhaps the most closely

  3. Determination of Seabird Density using Marine Radar Robert McFarlane* & James Lester

    E-Print Network [OSTI]

    Holberton, Rebecca L.

    for avian mortality due to the presence of wind turbines. The methodology utilized for the study involved has potential for onshore and offshore wind farm installations. Seabirds are important apex predators of estuarine and nearshore marine ecosystems and may be impacted by electricity-generating wind turbines

  4. Predicting Steam Turbine Performance

    E-Print Network [OSTI]

    Harriz, J. T.

    ," PREDICTING STEAM TURBINE PERFORMANCE James T. Harriz, EIT Waterland, Viar & Associates, Inc. Wilmington, Delaware ABSTRACT Tracking the performance of extraction, back pressure and condensing steam turbines is a crucial part... energy) and test data are presented. Techniques for deriving efficiency curves from each source are described. These techniques can be applied directly to any steam turbine reliability study effort. INTRODUCTION As the cost of energy resources...

  5. Direct drive wind turbine

    DOE Patents [OSTI]

    Bywaters, Garrett; Danforth, William; Bevington, Christopher; Jesse, Stowell; Costin, Daniel

    2006-10-10T23:59:59.000Z

    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 turbine includes a direct drive generator having an integrated disk brake positioned radially inside the stator while minimizing the potential for contamination. The turbine further includes a means for mounting a transformer below the nacelle within the tower.

  6. Direct drive wind turbine

    DOE Patents [OSTI]

    Bywaters, Garrett; Danforth, William; Bevington, Christopher; Stowell, Jesse; Costin, Daniel

    2006-07-11T23:59:59.000Z

    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 turbine includes a direct drive generator having an integrated disk brake positioned radially inside the stator while minimizing the potential for contamination. The turbine further includes a means for mounting a transformer below the nacelle within the tower.

  7. Direct drive wind turbine

    DOE Patents [OSTI]

    Bywaters, Garrett Lee; Danforth, William; Bevington, Christopher; Stowell, Jesse; Costin, Daniel

    2006-09-19T23:59:59.000Z

    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 turbine includes a direct drive generator having an integrated disk brake positioned radially inside the stator while minimizing the potential for contamination. The turbine further includes a means for mounting a transformer below the nacelle within the tower.

  8. Direct drive wind turbine

    DOE Patents [OSTI]

    Bywaters, Garrett; Danforth, William; Bevington, Christopher; Jesse, Stowell; Costin, Daniel

    2007-02-27T23:59:59.000Z

    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 turbine includes a direct drive generator having an integrated disk brake positioned radially inside the stator while minimizing the potential for contamination. The turbine further includes a means for mounting a transformer below the nacelle within the tower.

  9. Rampressor Turbine Design

    SciTech Connect (OSTI)

    Ramgen Power Systems

    2003-09-30T23:59:59.000Z

    The design of a unique gas turbine engine is presented. The first Rampressor Turbine engine rig will be a configuration where the Rampressor rotor is integrated into an existing industrial gas turbine engine. The Rampressor rotor compresses air which is burned in a traditional stationary combustion system in order to increase the enthalpy of the compressed air. The combustion products are then expanded through a conventional gas turbine which provides both compressor and electrical power. This in turn produces shaft torque, which drives a generator to provide electricity. The design and the associated design process of such an engine are discussed in this report.

  10. Wind Turbine Tribology Seminar

    Broader source: Energy.gov [DOE]

    Wind turbine reliability issues are often linked to failures of contacting components, such as bearings, gears, and actuators. Therefore, special consideration to tribological design in wind...

  11. Barstow Wind Turbine Project

    Broader source: Energy.gov [DOE]

    Presentation covers the Barstow Wind Turbine project for the Federal Utility Partnership Working Group (FUPWG) meeting, held on November 18-19, 2009.

  12. Hermetic turbine generator

    DOE Patents [OSTI]

    Meacher, John S. (Ballston Lake, NY); Ruscitto, David E. (Ballston Spa, NY)

    1982-01-01T23:59:59.000Z

    A Rankine cycle turbine drives an electric generator and a feed pump, all on a single shaft, and all enclosed within a hermetically sealed case. The shaft is vertically oriented with the turbine exhaust directed downward and the shaft is supported on hydrodynamic fluid film bearings using the process fluid as lubricant and coolant. The selection of process fluid, type of turbine, operating speed, system power rating, and cycle state points are uniquely coordinated to achieve high turbine efficiency at the temperature levels imposed by the recovery of waste heat from the more prevalent industrial processes.

  13. Single rotor turbine engine

    DOE Patents [OSTI]

    Platts, David A. (Los Alamos, NM)

    2002-01-01T23:59:59.000Z

    There has been invented a turbine engine with a single rotor which cools the engine, functions as a radial compressor, pushes air through the engine to the ignition point, and acts as an axial turbine for powering the compressor. The invention engine is designed to use a simple scheme of conventional passage shapes to provide both a radial and axial flow pattern through the single rotor, thereby allowing the radial intake air flow to cool the turbine blades and turbine exhaust gases in an axial flow to be used for energy transfer. In an alternative embodiment, an electric generator is incorporated in the engine to specifically adapt the invention for power generation. Magnets are embedded in the exhaust face of the single rotor proximate to a ring of stationary magnetic cores with windings to provide for the generation of electricity. In this alternative embodiment, the turbine is a radial inflow turbine rather than an axial turbine as used in the first embodiment. Radial inflow passages of conventional design are interleaved with radial compressor passages to allow the intake air to cool the turbine blades.

  14. Turbine disc sealing assembly

    DOE Patents [OSTI]

    Diakunchak, Ihor S.

    2013-03-05T23:59:59.000Z

    A disc seal assembly for use in a turbine engine. The disc seal assembly includes a plurality of outwardly extending sealing flange members that define a plurality of fluid pockets. The sealing flange members define a labyrinth flow path therebetween to limit leakage between a hot gas path and a disc cavity in the turbine engine.

  15. Gas turbine diagnostic system

    E-Print Network [OSTI]

    Talgat, Shuvatov

    2011-01-01T23:59:59.000Z

    In the given article the methods of parametric diagnostics of gas turbine based on fuzzy logic is proposed. The diagnostic map of interconnection between some parts of turbine and changes of corresponding parameters has been developed. Also we have created model to define the efficiency of the compressor using fuzzy logic algorithms.

  16. Ceramic turbine nozzle

    DOE Patents [OSTI]

    Shaffer, J.E.; Norton, P.F.

    1996-12-17T23:59:59.000Z

    A turbine nozzle and shroud assembly having a preestablished rate of thermal expansion is positioned in a gas turbine engine and being attached to conventional metallic components. The metallic components have a preestablished rate of thermal expansion greater than the preestablished rate of thermal expansion of the turbine nozzle vane assembly. The turbine nozzle vane assembly includes a plurality of segmented vane defining a first vane segment and a second vane segment, each of the first and second vane segments having a vertical portion, and each of the first vane segments and the second vane segments being positioned in functional relationship one to another within a recess formed within an outer shroud and an inner shroud. The turbine nozzle and shroud assembly provides an economical, reliable and effective ceramic component having a preestablished rate of thermal expansion being less than the preestablished rate of thermal expansion of the other component. 4 figs.

  17. Ceramic turbine nozzle

    DOE Patents [OSTI]

    Shaffer, James E. (Maitland, FL); Norton, Paul F. (San Diego, CA)

    1996-01-01T23:59:59.000Z

    A turbine nozzle and shroud assembly having a preestablished rate of thermal expansion is positioned in a gas turbine engine and being attached to conventional metallic components. The metallic components having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the turbine nozzle vane assembly. The turbine nozzle vane assembly includes a plurality of segmented vane defining a first vane segment and a second vane segment. Each of the first and second vane segments having a vertical portion. Each of the first vane segments and the second vane segments being positioned in functional relationship one to another within a recess formed within an outer shroud and an inner shroud. The turbine nozzle and shroud assembly provides an economical, reliable and effective ceramic component having a preestablished rate of thermal expansion being less than the preestablished rate of thermal expansion of the other component.

  18. Ceramic Cerami Turbine Nozzle

    DOE Patents [OSTI]

    Boyd, Gary L. (Alpine, CA)

    1997-04-01T23:59:59.000Z

    A turbine nozzle vane assembly having a preestablished rate of thermal expansion is positioned in a gas turbine engine and being attached to conventional metallic components. The metallic components having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the turbine nozzle vane assembly. The turbine nozzle vane assembly includes an outer shroud and an inner shroud having a plurality of horizontally segmented vanes therebetween being positioned by a connecting member positioning segmented vanes in functional relationship one to another. The turbine nozzle vane assembly provides an economical, reliable and effective ceramic component having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the other component.

  19. Comptes Rendus des JNC 17 -Poitiers 2011 Durabilit des composites pour nergie marine renouvelable

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    in marine applications and in structures highly loaded in fatigue such as wind turbine blades. However, very/resin interface all influence the fatigue behaviour of these materials in sea water. Mots Clés : Fatigue, eau de, blade 1. L'énergie marine renouvelable Afin d'atteindre les objectifs de l'Union Européenne ŕ l

  20. Cooled snubber structure for turbine blades

    DOE Patents [OSTI]

    Mayer, Clinton A; Campbell, Christian X; Whalley, Andrew; Marra, John J

    2014-04-01T23:59:59.000Z

    A turbine blade assembly in a turbine engine. The turbine blade assembly includes a turbine blade and a first snubber structure. The turbine blade includes an internal cooling passage containing cooling air. The first snubber structure extends outwardly from a sidewall of the turbine blade and includes a hollow interior portion that receives cooling air from the internal cooling passage of the turbine blade.

  1. Wind Turbine Blockset General Overview

    E-Print Network [OSTI]

    Wind Turbine Blockset in Saber General Overview and Description of the Models Florin Iov, Adrian Turbine Blockset in Saber Abstract. This report presents a new developed Saber Toolbox for wind turbine, optimize and design wind turbines". The report provides a quick overview of the Saber and then explains

  2. Wind Turbine Acoustic Noise A white paper

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Wind Turbine Acoustic Noise A white paper Prepared by the Renewable Energy Research Laboratory...................................................................... 8 Sound from Wind Turbines .............................................................................................. 10 Sources of Wind Turbine Sound

  3. Gas turbine combustor transition

    DOE Patents [OSTI]

    Coslow, Billy Joe (Winter Park, FL); Whidden, Graydon Lane (Great Blue, CT)

    1999-01-01T23:59:59.000Z

    A method of converting a steam cooled transition to an air cooled transition in a gas turbine having a compressor in fluid communication with a combustor, a turbine section in fluid communication with the combustor, the transition disposed in a combustor shell and having a cooling circuit connecting a steam outlet and a steam inlet and wherein hot gas flows from the combustor through the transition and to the turbine section, includes forming an air outlet in the transition in fluid communication with the cooling circuit and providing for an air inlet in the transition in fluid communication with the cooling circuit.

  4. Composite turbine bucket assembly

    DOE Patents [OSTI]

    Liotta, Gary Charles; Garcia-Crespo, Andres

    2014-05-20T23:59:59.000Z

    A composite turbine blade assembly includes a ceramic blade including an airfoil portion, a shank portion and an attachment portion; and a transition assembly adapted to attach the ceramic blade to a turbine disk or rotor, the transition assembly including first and second transition components clamped together, trapping said ceramic airfoil therebetween. Interior surfaces of the first and second transition portions are formed to mate with the shank portion and the attachment portion of the ceramic blade, and exterior surfaces of said first and second transition components are formed to include an attachment feature enabling the transition assembly to be attached to the turbine rotor or disk.

  5. Gas turbine combustor transition

    DOE Patents [OSTI]

    Coslow, B.J.; Whidden, G.L.

    1999-05-25T23:59:59.000Z

    A method is described for converting a steam cooled transition to an air cooled transition in a gas turbine having a compressor in fluid communication with a combustor, a turbine section in fluid communication with the combustor, the transition disposed in a combustor shell and having a cooling circuit connecting a steam outlet and a steam inlet and wherein hot gas flows from the combustor through the transition and to the turbine section, includes forming an air outlet in the transition in fluid communication with the cooling circuit and providing for an air inlet in the transition in fluid communication with the cooling circuit. 7 figs.

  6. Turbine blade vibration dampening

    DOE Patents [OSTI]

    Cornelius, Charles C. (San Diego, CA); Pytanowski, Gregory P. (San Diego, CA); Vendituoli, Jonathan S. (San Diego, CA)

    1997-07-08T23:59:59.000Z

    The present turbine wheel assembly increases component life and turbine engine longevity. The combination of the strap and the opening combined with the preestablished area of the outer surface of the opening and the preestablished area of the outer circumferential surface of the strap and the friction between the strap and the opening increases the life and longevity of the turbine wheel assembly. Furthermore, the mass "M" or combined mass "CM" of the strap or straps and the centrifugal force assist in controlling vibrations and damping characteristics.

  7. Turbine blade vibration dampening

    DOE Patents [OSTI]

    Cornelius, C.C.; Pytanowski, G.P.; Vendituoli, J.S.

    1997-07-08T23:59:59.000Z

    The present turbine wheel assembly increases component life and turbine engine longevity. The combination of the strap and the opening combined with the preestablished area of the outer surface of the opening and the preestablished area of the outer circumferential surface of the strap and the friction between the strap and the opening increases the life and longevity of the turbine wheel assembly. Furthermore, the mass ``M`` or combined mass ``CM`` of the strap or straps and the centrifugal force assist in controlling vibrations and damping characteristics. 5 figs.

  8. Gas Turbine Emissions 

    E-Print Network [OSTI]

    Frederick, J. D.

    1990-01-01T23:59:59.000Z

    of regulatory interest in the 'real world' test results coupled with the difficulties of gathering analogous bench test data for systems employing gas turbines with Heat Recovery Steam Generators (HRSG) and steam injection. It appears that the agencies...

  9. Predicting Steam Turbine Performance 

    E-Print Network [OSTI]

    Harriz, J. T.

    1985-01-01T23:59:59.000Z

    Tracking the performance of extraction, back-pressure and condensing steam turbines is a crucial part of minimising energy and maintenance costs for large process industries. A thorough understanding of key equipment performance characteristics...

  10. Turbine nozzle positioning system

    DOE Patents [OSTI]

    Norton, P.F.; Shaffer, J.E.

    1996-01-30T23:59:59.000Z

    A nozzle guide vane assembly having a preestablished rate of thermal expansion is positioned in a gas turbine engine and being attached to conventional metallic components. The nozzle guide vane assembly includes an outer shroud having a mounting leg with an opening defined therein, a tip shoe ring having a mounting member with an opening defined therein, a nozzle support ring having a plurality of holes therein and a pin positioned in the corresponding opening in the outer shroud, opening in the tip shoe ring and the hole in the nozzle support ring. A rolling joint is provided between metallic components of the gas turbine engine and the nozzle guide vane assembly. The nozzle guide vane assembly is positioned radially about a central axis of the gas turbine engine and axially aligned with a combustor of the gas turbine engine. 9 figs.

  11. Industrial Gas Turbines

    Broader source: Energy.gov [DOE]

    A gas turbine is a heat engine that uses high-temperature, high-pressure gas as the working fluid. Part of the heat supplied by the gas is converted directly into mechanical work. High-temperature,...

  12. Turbine nozzle positioning system

    DOE Patents [OSTI]

    Norton, Paul F. (San Diego, CA); Shaffer, James E. (Maitland, FL)

    1996-01-30T23:59:59.000Z

    A nozzle guide vane assembly having a preestablished rate of thermal expansion is positioned in a gas turbine engine and being attached to conventional metallic components. The nozzle guide vane assembly includes an outer shroud having a mounting leg with an opening defined therein, a tip shoe ring having a mounting member with an opening defined therein, a nozzle support ring having a plurality of holes therein and a pin positioned in the corresponding opening in the outer shroud, opening in the tip shoe ring and the hole in the nozzle support ring. A rolling joint is provided between metallic components of the gas turbine engine and the nozzle guide vane assembly. The nozzle guide vane assembly is positioned radially about a central axis of the gas turbine engine and axially aligned with a combustor of the gas turbine engine.

  13. Turbine inner shroud and turbine assembly containing such inner shroud

    DOE Patents [OSTI]

    Bagepalli, Bharat Sampathkumaran (Niskayuna, NY); Corman, Gregory Scot (Ballston Lake, NY); Dean, Anthony John (Scotia, NY); DiMascio, Paul Stephen (Clifton Park, NY); Mirdamadi, Massoud (Niskayuna, NY)

    2001-01-01T23:59:59.000Z

    A turbine inner shroud and a turbine assembly. The turbine assembly includes a turbine stator having a longitudinal axis and having an outer shroud block with opposing and longitudinally outward facing first and second sides having open slots. A ceramic inner shroud has longitudinally inward facing hook portions which can longitudinally and radially surround a portion of the sides of the outer shroud block. In one attachment, the hook portions are engageable with, and are positioned within, the open slots.

  14. Turbine tip clearance loss mechanisms

    E-Print Network [OSTI]

    Mazur, Steven (Steven Andrew)

    2013-01-01T23:59:59.000Z

    Three-dimensional numerical simulations (RANS and URANS) were used to assess the impact of two specific design features, and of aspects of the actual turbine environment, on turbine blade tip loss. The calculations were ...

  15. Ceramic stationary gas turbine

    SciTech Connect (OSTI)

    Roode, M. van

    1995-12-31T23:59:59.000Z

    The performance of current industrial gas turbines is limited by the temperature and strength capabilities of the metallic structural materials in the engine hot section. Because of their superior high-temperature strength and durability, ceramics can be used as structural materials for hot section components (blades, nozzles, combustor liners) in innovative designs at increased turbine firing temperatures. The benefits include the ability to increase the turbine inlet temperature (TIT) to about 1200{degrees}C ({approx}2200{degrees}F) or more with uncooled ceramics. It has been projected that fully optimized stationary gas turbines would have a {approx}20 percent gain in thermal efficiency and {approx}40 percent gain in output power in simple cycle compared to all metal-engines with air-cooled components. Annual fuel savings in cogeneration in the U.S. would be on the order of 0.2 Quad by 2010. Emissions reductions to under 10 ppmv NO{sub x} are also forecast. This paper describes the progress on a three-phase, 6-year program sponsored by the U.S. Department of Energy, Office of Industrial Technologies, to achieve significant performance improvements and emissions reductions in stationary gas turbines by replacing metallic hot section components with ceramic parts. Progress is being reported for the period September 1, 1994, through September 30, 1995.

  16. Anticipatory control of turbine generators

    E-Print Network [OSTI]

    Messec, Freddie Laurel

    1971-01-01T23:59:59.000Z

    of Turbine Generators. (Nay 1971) Freddie Laurel Nessec, B. S. E. E, , Texas Tech University; Directed by: Professor J. S . Denison An investigation is made of the use of predicted loads in controlling turbine generators. A perturbation model of a turbine... 3. Relational diagram of a turbine generator. Speed governor system. Static speed-load characteristic of a speed governor system. Block diagram of model. Frequency response to step load change. Block diagram of model with integral control...

  17. Optimization of Wind Turbine Operation

    E-Print Network [OSTI]

    Optimization of Wind Turbine Operation by Use of Spinner Anemometer TF Pedersen, NN Sørensen, L Title: Optimization of Wind Turbine Operation by Use of Spinner Anemometer Department: Wind Energy prototype wind turbine. Statistics of the yaw error showed an average of about 10°. The average flow

  18. Model Predictive Control Wind Turbines

    E-Print Network [OSTI]

    Model Predictive Control of Wind Turbines Martin Klauco Kongens Lyngby 2012 IMM-MSc-2012-65 #12;Summary Wind turbines are the biggest part of the green energy industry. Increasing interest control strategies. Control strategy has a significant impact on the wind turbine operation on many levels

  19. Wind turbine spoiler

    DOE Patents [OSTI]

    Sullivan, William N. (Albuquerque, NM)

    1985-01-01T23:59:59.000Z

    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.

  20. Gas turbine sealing apparatus

    DOE Patents [OSTI]

    Wiebe, David J; Wessell, Brian J; Ebert, Todd; Beeck, Alexander; Liang, George; Marussich, Walter H

    2013-02-19T23:59:59.000Z

    A gas turbine includes forward and aft rows of rotatable blades, a row of stationary vanes between the forward and aft rows of rotatable blades, an annular intermediate disc, and a seal housing apparatus. The forward and aft rows of rotatable blades are coupled to respective first and second portions of a disc/rotor assembly. The annular intermediate disc is coupled to the disc/rotor assembly so as to be rotatable with the disc/rotor assembly during operation of the gas turbine. The annular intermediate disc includes a forward side coupled to the first portion of the disc/rotor assembly and an aft side coupled to the second portion of the disc/rotor assembly. The seal housing apparatus is coupled to the annular intermediate disc so as to be rotatable with the annular intermediate disc and the disc/rotor assembly during operation of the gas turbine.

  1. Turbine nozzle attachment system

    DOE Patents [OSTI]

    Norton, P.F.; Shaffer, J.E.

    1995-10-24T23:59:59.000Z

    A nozzle guide vane assembly having a preestablished rate of thermal expansion is positioned in a gas turbine engine and is attached to conventional metallic components. The nozzle guide vane assembly includes a pair of legs extending radially outwardly from an outer shroud and a pair of mounting legs extending radially inwardly from an inner shroud. Each of the pair of legs and mounting legs have a pair of holes therein. A plurality of members attached to the gas turbine engine have a plurality of bores therein which axially align with corresponding ones of the pair of holes in the legs. A plurality of pins are positioned within the corresponding holes and bores radially positioning the nozzle guide vane assembly about a central axis of the gas turbine engine. 3 figs.

  2. Turbine nozzle attachment system

    DOE Patents [OSTI]

    Norton, Paul F. (San Diego, CA); Shaffer, James E. (Maitland, FL)

    1995-01-01T23:59:59.000Z

    A nozzle guide vane assembly having a preestablished rate of thermal expansion is positioned in a gas turbine engine and being attached to conventional metallic components. The nozzle guide vane assembly includes a pair of legs extending radially outwardly from an outer shroud and a pair of mounting legs extending radially inwardly from an inner shroud. Each of the pair of legs and mounting legs have a pair of holes therein. A plurality of members attached to the gas turbine engine have a plurality of bores therein which axially align with corresponding ones of the pair of holes in the legs. A plurality of pins are positioned within the corresponding holes and bores radially positioning the nozzle guide vane assembly about a central axis of the gas turbine engine.

  3. Velocity pump reaction turbine

    DOE Patents [OSTI]

    House, Palmer A. (Walnut Creek, CA)

    1982-01-01T23:59:59.000Z

    An expanding hydraulic/two-phase velocity pump reaction turbine including a dual concentric rotor configuration with an inter-rotor annular flow channel in which the inner rotor is mechanically driven by the outer rotor. In another embodiment, the inner rotor is immobilized and provided with gas recovery ports on its outer surface by means of which gas in solution may be recovered. This velocity pump reaction turbine configuration is capable of potential energy conversion efficiencies of up to 70%, and is particularly suited for geothermal applications.

  4. Velocity pump reaction turbine

    DOE Patents [OSTI]

    House, Palmer A. (Walnut Creek, CA)

    1984-01-01T23:59:59.000Z

    An expanding hydraulic/two-phase velocity pump reaction turbine including a dual concentric rotor configuration with an inter-rotor annular flow channel in which the inner rotor is mechanically driven by the outer rotor. In another embodiment, the inner rotor is immobilized and provided with gas recovery ports on its outer surface by means of which gas in solution may be recovered. This velocity pump reaction turbine configuration is capable of potential energy conversion efficiencies of up to 70%, and is particularly suited for geothermal applications.

  5. ADVANCED TURBINE SYSTEMS PROGRAM

    SciTech Connect (OSTI)

    Gregory Gaul

    2004-04-21T23:59:59.000Z

    Natural gas combustion turbines are rapidly becoming the primary technology of choice for generating electricity. At least half of the new generating capacity added in the US over the next twenty years will be combustion turbine systems. The Department of Energy has cosponsored with Siemens Westinghouse, a program to maintain the technology lead in gas turbine systems. The very ambitious eight year program was designed to demonstrate a highly efficient and commercially acceptable power plant, with the ability to fire a wide range of fuels. The main goal of the Advanced Turbine Systems (ATS) Program was to develop ultra-high efficiency, environmentally superior and cost effective competitive gas turbine systems for base load application in utility, independent power producer and industrial markets. Performance targets were focused on natural gas as a fuel and included: System efficiency that exceeds 60% (lower heating value basis); Less than 10 ppmv NO{sub x} emissions without the use of post combustion controls; Busbar electricity that are less than 10% of state of the art systems; Reliability-Availability-Maintainability (RAM) equivalent to current systems; Water consumption minimized to levels consistent with cost and efficiency goals; and Commercial systems by the year 2000. In a parallel effort, the program was to focus on adapting the ATS engine to coal-derived or biomass fuels. In Phase 1 of the ATS Program, preliminary investigators on different gas turbine cycles demonstrated that net plant LHV based efficiency greater than 60% was achievable. In Phase 2 the more promising cycles were evaluated in greater detail and the closed-loop steam-cooled combined cycle was selected for development because it offered the best solution with least risk for achieving the ATS Program goals for plant efficiency, emissions, cost of electricity and RAM. Phase 2 also involved conceptual ATS engine and plant design and technology developments in aerodynamics, sealing, combustion, cooling, materials, coatings and casting development. The market potential for the ATS gas turbine in the 2000-2014 timeframe was assessed for combined cycle, simple cycle and integrated gasification combined cycle, for three engine sizes. The total ATS market potential was forecasted to exceed 93 GW. Phase 3 and Phase 3 Extension involved further technology development, component testing and W501ATS engine detail design. The technology development efforts consisted of ultra low NO{sub x} combustion, catalytic combustion, sealing, heat transfer, advanced coating systems, advanced alloys, single crystal casting development and determining the effect of steam on turbine alloys. Included in this phase was full-load testing of the W501G engine at the McIntosh No. 5 site in Lakeland, Florida.

  6. Multiple piece turbine airfoil

    DOE Patents [OSTI]

    Kimmel, Keith D (Jupiter, FL); Wilson, Jr., Jack W. (Palm Beach Gardens, FL)

    2010-11-02T23:59:59.000Z

    A turbine airfoil, such as a rotor blade or a stator vane, for a gas turbine engine, the airfoil formed as a shell and spar construction with a plurality of dog bone struts each mounted within openings formed within the shell and spar to allow for relative motion between the spar and shell in the airfoil chordwise direction while also forming a seal between adjacent cooling channels. The struts provide the seal as well as prevent bulging of the shell from the spar due to the cooling air pressure.

  7. Vertical axis wind turbines

    DOE Patents [OSTI]

    Krivcov, Vladimir (Miass, RU); Krivospitski, Vladimir (Miass, RU); Maksimov, Vasili (Miass, RU); Halstead, Richard (Rohnert Park, CA); Grahov, Jurij (Miass, RU)

    2011-03-08T23:59:59.000Z

    A vertical axis wind turbine is described. The wind turbine can include a top ring, a middle ring and a lower ring, wherein a plurality of vertical airfoils are disposed between the rings. For example, three vertical airfoils can be attached between the upper ring and the middle ring. In addition, three more vertical airfoils can be attached between the lower ring and the middle ring. When wind contacts the vertically arranged airfoils the rings begin to spin. By connecting the rings to a center pole which spins an alternator, electricity can be generated from wind.

  8. Ceramic gas turbine shroud

    DOE Patents [OSTI]

    Shi, Jun; Green, Kevin E.

    2014-07-22T23:59:59.000Z

    An example gas turbine engine shroud includes a first annular ceramic wall having an inner side for resisting high temperature turbine engine gasses and an outer side with a plurality of radial slots. A second annular metallic wall is positioned radially outwardly of and enclosing the first annular ceramic wall and has a plurality of tabs in communication with the slot of the first annular ceramic wall. The tabs of the second annular metallic wall and slots of the first annular ceramic wall are in communication such that the first annular ceramic wall and second annular metallic wall are affixed.

  9. Turbine vane structure

    DOE Patents [OSTI]

    Irwin, John A. (Greenwood, IN)

    1980-08-19T23:59:59.000Z

    A liquid cooled stator blade assembly for a gas turbine engine includes an outer shroud having a pair of liquid inlets and a pair of liquid outlets supplied through a header and wherein means including tubes support the header radially outwardly of the shroud and also couple the header with the pair of liquid inlets and outlets. A pair of turbine vanes extend radially between the shroud and a vane platform to define a gas turbine motive fluid passage therebetween; and each of the vanes is cooled by an internal body casting of super alloy material with a grooved layer of highly heat conductive material that includes spaced apart flat surface trailing edges in alignment with a flat trailing edge of the casting joined to wall segments of the liner which are juxtaposed with respect to the internal casting to form an array of parallel liquid inlet passages on one side of the vane and a second plurality of parallel liquid return passages on the opposite side of the vane; and a superalloy heat and wear resistant imperforate skin covers the outer surface of the composite blade including the internal casting and the heat conductive layer; a separate trailing edge section includes an internal casting and an outer skin butt connected to the end surfaces of the internal casting and the heat conductive layer to form an easily assembled liquid cooled trailing edge section in the turbine vane.

  10. Turbine blade tip gap reduction system

    DOE Patents [OSTI]

    Diakunchak, Ihor S.

    2012-09-11T23:59:59.000Z

    A turbine blade sealing system for reducing a gap between a tip of a turbine blade and a stationary shroud of a turbine engine. The sealing system includes a plurality of flexible seal strips extending from a pressure side of a turbine blade generally orthogonal to the turbine blade. During operation of the turbine engine, the flexible seal strips flex radially outward extending towards the stationary shroud of the turbine engine, thereby reducing the leakage of air past the turbine blades and increasing the efficiency of the turbine engine.

  11. Yale ME Turbine Test cell instructions Background

    E-Print Network [OSTI]

    Haller, Gary L.

    Yale ME Turbine Test cell instructions Background: The Turbine Technologies Turbojet engine of the turbine and check a few items: o Open keyed access door on rear of Turbine enclosure o Check Jet A fuel valve ­ turn on, (Drain water separator if turbine has not been run in the last week,) check pressure

  12. SMART POWER TURBINE

    SciTech Connect (OSTI)

    Nirm V. Nirmalan

    2003-11-01T23:59:59.000Z

    Gas turbines are the choice technology for high-performance power generation and are employed in both simple and combined cycle configurations around the world. The Smart Power Turbine (SPT) program has developed new technologies that are needed to further extend the performance and economic attractiveness of gas turbines for power generation. Today's power generation gas turbines control firing temperatures indirectly, by measuring the exhaust gas temperature and then mathematically calculating the peak combustor temperatures. But temperatures in the turbine hot gas path vary a great deal, making it difficult to control firing temperatures precisely enough to achieve optimal performance. Similarly, there is no current way to assess deterioration of turbine hot-gas-path components without shutting down the turbine. Consequently, maintenance and component replacements are often scheduled according to conservative design practices based on historical fleet-averaged data. Since fuel heating values vary with the prevalent natural gas fuel, the inability to measure heating value directly, with sufficient accuracy and timeliness, can lead to maintenance and operational decisions that are less than optimal. GE Global Research Center, under this Smart Power Turbine program, has developed a suite of novel sensors that would measure combustor flame temperature, online fuel lower heating value (LHV), and hot-gas-path component life directly. The feasibility of using the ratio of the integrated intensities of portions of the OH emission band to determine the specific average temperature of a premixed methane or natural-gas-fueled combustion flame was demonstrated. The temperature determined is the temperature of the plasma included in the field of view of the sensor. Two sensor types were investigated: the first used a low-resolution fiber optic spectrometer; the second was a SiC dual photodiode chip. Both methods worked. Sensitivity to flame temperature changes was remarkably high, that is a 1-2.5% change in ratio for an 11.1 C (20 F) change in temperature at flame temperatures between 1482.2 C (2700 F) and 1760 C (3200 F). Sensor ratio calibration was performed using flame temperatures determined by calculations using the amount of unburned oxygen in the exhaust and by the fuel/air ratio of the combustible gas mixture. The agreement between the results of these two methods was excellent. The sensor methods characterized are simple and viable. Experiments are underway to validate the GE Flame Temperature Sensor as a practical tool for use with multiburner gas turbine combustors. The lower heating value (LHV) Fuel Quality Sensor consists of a catalytic film deposited on the surface of a microhotplate. This micromachined design has low heat capacity and thermal conductivity, making it ideal for heating catalysts placed on its surface. Several methods of catalyst deposition were investigated, including micropen deposition and other proprietary methods, which permit precise and repeatable placement of the materials. The use of catalysts on the LHV sensor expands the limits of flammability (LoF) of combustion fuels as compared with conventional flames; an unoptimized LoF of 1-32% for natural gas (NG) in air was demonstrated with the microcombustor, whereas conventionally 4 to 16% is observed. The primary goal of this work was to measure the LHV of NG fuels. The secondary goal was to determine the relative quantities of the various components of NG mixes. This determination was made successfully by using an array of different catalysts operating at different temperatures. The combustion parameters for methane were shown to be dependent on whether Pt or Pd catalysts were used. In this project, significant effort was expended on making the LHV platform more robust by the addition of high-temperature stable materials, such as tantalum, and the use of passivation overcoats to protect the resistive heater/sensor materials from degradation in the combustion environment. Modeling and simulation were used to predict improved sensor designs.

  13. Snubber assembly for turbine blades

    DOE Patents [OSTI]

    Marra, John J

    2013-09-03T23:59:59.000Z

    A snubber associated with a rotatable turbine blade in a turbine engine, the turbine blade including a pressure sidewall and a suction sidewall opposed from the pressure wall. The snubber assembly includes a first snubber structure associated with the pressure sidewall of the turbine blade, a second snubber structure associated with the suction sidewall of the turbine blade, and a support structure. The support structure extends through the blade and is rigidly coupled at a first end portion thereof to the first snubber structure and at a second end portion thereof to the second snubber structure. Centrifugal loads exerted by the first and second snubber structures caused by rotation thereof during operation of the engine are at least partially transferred to the support structure, such that centrifugal loads exerted on the pressure and suctions sidewalls of the turbine blade by the first and second snubber structures are reduced.

  14. Theory and Performance of Tesla Turbines

    E-Print Network [OSTI]

    Romanin, Vincent D.

    2012-01-01T23:59:59.000Z

    through a Tesla turbine microchannel . . . . . . . . . . .1.2 History of the Tesla Turbine 1.3 BackgroundCFD) Solution of Flow Through a Tesla Turbine 4.1 Summary of

  15. OVERLAY COATINGS FOR GAS TURBINE AIRFOILS

    E-Print Network [OSTI]

    Boone, Donald H.

    2013-01-01T23:59:59.000Z

    of Supperalloys for Gas Turbine Engines, 11 J. Metals, Q,OVERLAY COATINGS FOR GAS TURBINE AIRFOILS Donald H. Boone1970, p. 545. R. Krutenat, Gas Turbine Materials Conference

  16. OVERLAY COATINGS FOR GAS TURBINE AIRFOILS

    E-Print Network [OSTI]

    Boone, Donald H.

    2013-01-01T23:59:59.000Z

    of Supperalloys for Gas Turbine Engines, 11 J. Metals, Q,FT4, JT9D and other gas turbines, and their use continues toOVERLAY COATINGS FOR GAS TURBINE AIRFOILS Donald H. Boone

  17. Automatic Control of Freeboard and Turbine Operation

    E-Print Network [OSTI]

    Automatic Control of Freeboard and Turbine Operation ­ Wave Dragon, Nissum Bredning Project: Sea of Freeboard and Turbine Operation Wave Dragon, Nissum Bredning by Jens Peter Kofoed & Peter Frigaard, Aalborg.........................................................................................................................10 TURBINE PERFORMANCE DATA

  18. Advanced Hydrogen Turbine Development

    SciTech Connect (OSTI)

    Joesph Fadok

    2008-01-01T23:59:59.000Z

    Siemens has developed a roadmap to achieve the DOE goals for efficiency, cost reduction, and emissions through innovative approaches and novel technologies which build upon worldwide IGCC operational experience, platform technology, and extensive experience in G-class operating conditions. In Phase 1, the technologies and concepts necessary to achieve the program goals were identified for the gas turbine components and supporting technology areas and testing plans were developed to mitigate identified risks. Multiple studies were conducted to evaluate the impact in plant performance of different gas turbine and plant technologies. 2015 gas turbine technologies showed a significant improvement in IGCC plant efficiency, however, a severe performance penalty was calculated for high carbon capture cases. Thermodynamic calculations showed that the DOE 2010 and 2015 efficiency targets can be met with a two step approach. A risk management process was instituted in Phase 1 to identify risk and develop mitigation plans. For the risks identified, testing and development programs are in place and the risks will be revisited periodically to determine if changes to the plan are necessary. A compressor performance prediction has shown that the design of the compressor for the engine can be achieved with additional stages added to the rear of the compressor. Tip clearance effects were studied as well as a range of flow and pressure ratios to evaluate the impacts to both performance and stability. Considerable data was obtained on the four candidate combustion systems: diffusion, catalytic, premix, and distributed combustion. Based on the results of Phase 1, the premixed combustion system and the distributed combustion system were chosen as having the most potential and will be the focus of Phase 2 of the program. Significant progress was also made in obtaining combustion kinetics data for high hydrogen fuels. The Phase 1 turbine studies indicate initial feasibility of the advanced hydrogen turbine that meets the aggressive targets set forth for the advanced hydrogen turbine, including increased rotor inlet temperature (RIT), lower total cooling and leakage air (TCLA) flow, higher pressure ratio, and higher mass flow through the turbine compared to the baseline. Maintaining efficiency with high mass flow Syngas combustion is achieved using a large high AN2 blade 4, which has been identified as a significant advancement beyond the current state-of-the-art. Preliminary results showed feasibility of a rotor system capable of increased power output and operating conditions above the baseline. In addition, several concepts were developed for casing components to address higher operating conditions. Rare earth modified bond coat for the purpose of reducing oxidation and TBC spallation demonstrated an increase in TBC spallation life of almost 40%. The results from Phase 1 identified two TBC compositions which satisfy the thermal conductivity requirements and have demonstrated phase stability up to temperatures of 1850 C. The potential to join alloys using a bonding process has been demonstrated and initial HVOF spray deposition trials were promising. The qualitative ranking of alloys and coatings in environmental conditions was also performed using isothermal tests where significant variations in alloy degradation were observed as a function of gas composition. Initial basic system configuration schematics and working system descriptions have been produced to define key boundary data and support estimation of costs. Review of existing materials in use for hydrogen transportation show benefits or tradeoffs for materials that could be used in this type of applications. Hydrogen safety will become a larger risk than when using natural gas fuel as the work done to date in other areas has shown direct implications for this type of use. Studies were conducted which showed reduced CO{sub 2} and NOx emissions with increased plant efficiency. An approach to maximize plant output is needed in order to address the DOE turbine goal for 20-30% reduction o

  19. Gas turbine cooling system

    DOE Patents [OSTI]

    Bancalari, Eduardo E. (Orlando, FL)

    2001-01-01T23:59:59.000Z

    A gas turbine engine (10) having a closed-loop cooling circuit (39) for transferring heat from the hot turbine section (16) to the compressed air (24) produced by the compressor section (12). The closed-loop cooling system (39) includes a heat exchanger (40) disposed in the flow path of the compressed air (24) between the outlet of the compressor section (12) and the inlet of the combustor (14). A cooling fluid (50) may be driven by a pump (52) located outside of the engine casing (53) or a pump (54) mounted on the rotor shaft (17). The cooling circuit (39) may include an orifice (60) for causing the cooling fluid (50) to change from a liquid state to a gaseous state, thereby increasing the heat transfer capacity of the cooling circuit (39).

  20. Airborne Wind Turbine

    SciTech Connect (OSTI)

    None

    2010-09-01T23:59:59.000Z

    Broad Funding Opportunity Announcement Project: Makani Power is developing an Airborne Wind Turbine (AWT) that eliminates 90% of the mass of a conventional wind turbine and accesses a stronger, more consistent wind at altitudes of near 1,000 feet. At these altitudes, 85% of the country can offer viable wind resources compared to only 15% accessible with current technology. Additionally, the Makani Power wing can be economically deployed in deep offshore waters, opening up a resource which is 4 times greater than the entire U.S. electrical generation capacity. Makani Power has demonstrated the core technology, including autonomous launch, land, and power generation with an 8 meter wingspan, 20 kW prototype. At commercial scale, Makani Power aims to develop a 600 kW, 28 meter wingspan product capable of delivering energy at an unsubsidized cost competitive with coal, the current benchmark for low-cost power.

  1. Multiple piece turbine airfoil

    DOE Patents [OSTI]

    Kimmel, Keith D (Jupiter, FL)

    2010-11-09T23:59:59.000Z

    A turbine airfoil, such as a rotor blade or a stator vane, for a gas turbine engine, the airfoil formed as a shell and spar construction with a plurality of hook shaped struts each mounted within channels extending in a spanwise direction of the spar and the shell to allow for relative motion between the spar and shell in the airfoil chordwise direction while also fanning a seal between adjacent cooling channels. The struts provide the seal as well as prevent bulging of the shell from the spar due to the cooling air pressure. The hook struts have a hooked shaped end and a rounded shaped end in order to insert the struts into the spar.

  2. Gas turbine sealing apparatus

    DOE Patents [OSTI]

    Marra, John Joseph; Wessell, Brian J.; Liang, George

    2013-03-05T23:59:59.000Z

    A sealing apparatus in a gas turbine. The sealing apparatus includes a seal housing apparatus coupled to a disc/rotor assembly so as to be rotatable therewith during operation of the gas turbine. The seal housing apparatus comprises a base member, a first leg portion, a second leg portion, and spanning structure. The base member extends generally axially between forward and aft rows of rotatable blades and is positioned adjacent to a row of stationary vanes. The first leg portion extends radially inwardly from the base member and is coupled to the disc/rotor assembly. The second leg portion is axially spaced from the first leg portion, extends radially inwardly from the base member, and is coupled to the disc/rotor assembly. The spanning structure extends between and is rigidly coupled to each of the base member, the first leg portion, and the second leg portion.

  3. Turbine seal assembly

    DOE Patents [OSTI]

    Little, David A.

    2013-04-16T23:59:59.000Z

    A seal assembly that limits gas leakage from a hot gas path to one or more disc cavities in a turbine engine. The seal assembly includes a seal apparatus that limits gas leakage from the hot gas path to a respective one of the disc cavities. The seal apparatus comprises a plurality of blade members rotatable with a blade structure. The blade members are associated with the blade structure and extend toward adjacent stationary components. Each blade member includes a leading edge and a trailing edge, the leading edge of each blade member being located circumferentially in front of the blade member's corresponding trailing edge in a direction of rotation of the turbine rotor. The blade members are arranged such that a space having a component in a circumferential direction is defined between adjacent circumferentially spaced blade members.

  4. Gas turbine premixing systems

    DOE Patents [OSTI]

    Kraemer, Gilbert Otto; Varatharajan, Balachandar; Evulet, Andrei Tristan; Yilmaz, Ertan; Lacy, Benjamin Paul

    2013-12-31T23:59:59.000Z

    Methods and systems are provided for premixing combustion fuel and air within gas turbines. In one embodiment, a combustor includes an upstream mixing panel configured to direct compressed air and combustion fuel through premixing zone to form a fuel-air mixture. The combustor includes a downstream mixing panel configured to mix additional combustion fuel with the fule-air mixture to form a combustion mixture.

  5. Airfoils for wind turbine

    DOE Patents [OSTI]

    Tangler, James L. (Boulder, CO); Somers, Dan M. (State College, PA)

    1996-01-01T23:59:59.000Z

    Airfoils for the blade of a wind turbine wherein each airfoil is characterized by a thickness in a range from 16%-24% and a maximum lift coefficient designed to be largely insensitive to roughness effects. The airfoils include a family of airfoils for a blade 15 to 25 meters in length, a family of airfoils for a blade 1 to 5 meters in length, and a family of airfoils for a blade 5 to 10 meters in length.

  6. Airfoils for wind turbine

    DOE Patents [OSTI]

    Tangler, J.L.; Somers, D.M.

    1996-10-08T23:59:59.000Z

    Airfoils are disclosed for the blade of a wind turbine wherein each airfoil is characterized by a thickness in a range from 16%-24% and a maximum lift coefficient designed to be largely insensitive to roughness effects. The airfoils include a family of airfoils for a blade 15 to 25 meters in length, a family of airfoils for a blade 1 to 5 meters in length, and a family of airfoils for a blade 5 to 10 meters in length. 10 figs.

  7. Tornado type wind turbines

    DOE Patents [OSTI]

    Hsu, Cheng-Ting (Ames, IA)

    1984-01-01T23:59:59.000Z

    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.

  8. Steam Path Audits on Industrial Steam Turbines

    E-Print Network [OSTI]

    Mitchell, D. R.

    in sellable power output as a result of improved turbine efficiency. The Lyondell facility is a combined cycle power plant where a gas turbine: heat recovery system supplies steam to the steam turbine. Since this steam is a bypropuct of the gas turbine...steam Path Audits on Industrial steam Turbines DOUGLAS R. MITCHELL. ENGINEER. ENCOTECH, INC., SCHENECTADY, NEW YORK ABSTRACT The electric utility industry has benefitted from steam path audits on steam turbines for several years. Benefits...

  9. How to Build a Turbine

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Turbine Sign In About | Careers | Contact | Investors | bpa.gov Search News & Us Expand News & Us Projects & Initiatives Expand Projects & Initiatives Finance & Rates...

  10. Study of the Acoustic Effects of Hydrokinetic Tidal Turbines in Admiralty Inlet, Puget Sound

    SciTech Connect (OSTI)

    Brian Polagye; Jim Thomson; Chris Bassett; Jason Wood; Dom Tollit; Robert Cavagnaro; Andrea Copping

    2012-03-30T23:59:59.000Z

    Hydrokinetic turbines will be a source of noise in the marine environment - both during operation and during installation/removal. High intensity sound can cause injury or behavioral changes in marine mammals and may also affect fish and invertebrates. These noise effects are, however, highly dependent on the individual marine animals; the intensity, frequency, and duration of the sound; and context in which the sound is received. In other words, production of sound is a necessary, but not sufficient, condition for an environmental impact. At a workshop on the environmental effects of tidal energy development, experts identified sound produced by turbines as an area of potentially significant impact, but also high uncertainty. The overall objectives of this project are to improve our understanding of the potential acoustic effects of tidal turbines by: (1) Characterizing sources of existing underwater noise; (2) Assessing the effectiveness of monitoring technologies to characterize underwater noise and marine mammal responsiveness to noise; (3) Evaluating the sound profile of an operating tidal turbine; and (4) Studying the effect of turbine sound on surrogate species in a laboratory environment. This study focuses on a specific case study for tidal energy development in Admiralty Inlet, Puget Sound, Washington (USA), but the methodologies and results are applicable to other turbine technologies and geographic locations. The project succeeded in achieving the above objectives and, in doing so, substantially contributed to the body of knowledge around the acoustic effects of tidal energy development in several ways: (1) Through collection of data from Admiralty Inlet, established the sources of sound generated by strong currents (mobilizations of sediment and gravel) and determined that low-frequency sound recorded during periods of strong currents is non-propagating pseudo-sound. This helped to advance the debate within the marine and hydrokinetics acoustic community as to whether strong currents produce propagating sound. (2) Analyzed data collected from a tidal turbine operating at the European Marine Energy Center to develop a profile of turbine sound and developed a framework to evaluate the acoustic effects of deploying similar devices in other locations. This framework has been applied to Public Utility District No. 1 of Snohomish Country's demonstration project in Admiralty Inlet to inform postinstallation acoustic and marine mammal monitoring plans. (3) Demonstrated passive acoustic techniques to characterize the ambient noise environment at tidal energy sites (fixed, long-term observations recommended) and characterize the sound from anthropogenic sources (drifting, short-term observations recommended). (4) Demonstrated the utility and limitations of instrumentation, including bottom mounted instrumentation packages, infrared cameras, and vessel monitoring systems. In doing so, also demonstrated how this type of comprehensive information is needed to interpret observations from each instrument (e.g., hydrophone data can be combined with vessel tracking data to evaluate the contribution of vessel sound to ambient noise). (5) Conducted a study that suggests harbor porpoise in Admiralty Inlet may be habituated to high levels of ambient noise due to omnipresent vessel traffic. The inability to detect behavioral changes associated with a high intensity source of opportunity (passenger ferry) has informed the approach for post-installation marine mammal monitoring. (6) Conducted laboratory exposure experiments of juvenile Chinook salmon and showed that exposure to a worse than worst case acoustic dose of turbine sound does not result in changes to hearing thresholds or biologically significant tissue damage. Collectively, this means that Chinook salmon may be at a relatively low risk of injury from sound produced by tidal turbines located in or near their migration path. In achieving these accomplishments, the project has significantly advanced the District's goals of developing a demonstration-scale tidal energy proj

  11. Sandia Energy - Sandia Wind Turbine Loads Database

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sandia Wind Turbine Loads Database Home Stationary Power Energy Conversion Efficiency Wind Energy Resources Wind Software Downloads Sandia Wind Turbine Loads Database Sandia Wind...

  12. turbine thermal index | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    obtained through this project can directly benefit the U.S. power and utility turbine industry by improving product development that specifically meets DOE advanced turbine program...

  13. Advanced Manufacturing Initiative Improves Turbine Blade Productivity...

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

    Advanced Manufacturing Initiative Improves Turbine Blade Productivity Advanced Manufacturing Initiative Improves Turbine Blade Productivity May 20, 2011 - 2:56pm Addthis This is an...

  14. Addressing Wind Turbine Tribological Challenges with Surface...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Addressing Wind Turbine Tribological Challenges with Surface Engineering Presented by Gary Doll of the University of Akron at the Wind Turbine Tribology Seminar 2014. Addressing...

  15. MHK Technologies/Blue Motion Energy marine turbine | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:LandownersLuther, Oklahoma:Energy InformationSEAREVAquaBuoy

  16. Sandia Energy - Investigations on Marine Hydrokinetic Turbine Foil

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Scienceand RequirementsCoatingsUltra-High-VoltagePower Company'sInAsInternationalStructural Health

  17. Aviation Enterprises Ltd see Marine Current Turbines Ltd | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia: Energy

  18. EA-1965: Florida Atlantic University Southeast National Marine Renewable Energy Center’s Offshore Marine Hydrokinetic Technology Testing Project, Florida

    Broader source: Energy.gov [DOE]

    The Department of Energy (DOE), through its Wind and Water Power Technologies Office (WWPTO), is proposing to provide federal funding to Florida Atlantic University’s South-East National Marine Renewable Energy Center (FAU SNMREC) to support the at sea testing of FAU SNMREC’s experimental current generation turbine and the deployment and operation of their Small-Scale Ocean Current Turbine Test Berth, sited on the outer continental shelf (OCS) in waters off the coast of Ft Lauderdale, Florida. SNMREC would demonstrate the test berth site readiness by testing their pilot-scale experimental ocean current turbine unit at that location. The Bureau of Ocean Energy Management (BOEM) conducted an Environmental Assessment to analyze the impacts associated with leasing OCS lands to FAU SNMREC, per their jurisdictional responsibilities under the Outer Continental Shelf Lands Act. DOE was a cooperating agency in this process and based on the EA, DOE issued a Finding of No Significant Impact.

  19. NEXT GENERATION TURBINE PROGRAM

    SciTech Connect (OSTI)

    William H. Day

    2002-05-03T23:59:59.000Z

    The Next Generation Turbine (NGT) Program's technological development focused on a study of the feasibility of turbine systems greater than 30 MW that offer improvement over the 1999 state-of-the-art systems. This program targeted goals of 50 percent turndown ratios, 15 percent reduction in generation cost/kW hour, improved service life, reduced emissions, 400 starts/year with 10 minutes to full load, and multiple fuel usage. Improvement in reliability, availability, and maintainability (RAM), while reducing operations, maintenance, and capital costs by 15 percent, was pursued. This program builds on the extensive low emissions stationary gas turbine work being carried out by Pratt & Whitney (P&W) for P&W Power Systems (PWPS), which is a company under the auspices of the United Technologies Corporation (UTC). This study was part of the overall Department of Energy (DOE) NGT Program that extends out to the year 2008. A follow-on plan for further full-scale component hardware testing is conceptualized for years 2002 through 2008 to insure a smooth and efficient transition to the marketplace for advanced turbine design and cycle technology. This program teamed the National Energy Technology Laboratory (NETL), P&W, United Technologies Research Center (UTRC), kraftWork Systems Inc., a subcontractor on-site at UTRC, and Multiphase Power and Processing Technologies (MPPT), an off-site subcontractor. Under the auspices of the NGT Program, a series of analyses were performed to identify the NGT engine system's ability to serve multiple uses. The majority were in conjunction with a coal-fired plant, or used coal as the system fuel. Identified also was the ability of the NGT system to serve as the basis of an advanced performance cycle: the humid air turbine (HAT) cycle. The HAT cycle is also used with coal gasification in an integrated cycle HAT (IGHAT). The NGT systems identified were: (1) Feedwater heating retrofit to an existing coal-fired steam plant, which could supply both heat and peaking power (Block 2 engine); (2) Repowering of an older coal-fired plant (Block 2 engine); (3) Gas-fired HAT cycle (Block 1 and 2 engines); (4) Integrated gasification HAT (Block 1 and 2 engines). Also under Phase I of the NGT Program, a conceptual design of the combustion system has been completed. An integrated approach to cycle optimization for improved combustor turndown capability has been employed. The configuration selected has the potential for achieving single digit NO{sub x}/CO emissions between 40 percent and 100 percent load conditions. A technology maturation plan for the combustion system has been proposed. Also, as a result of Phase I, ceramic vane technology will be incorporated into NGT designs and will require less cooling flow than conventional metallic vanes, thereby improving engine efficiency. A common 50 Hz and 60 Hz power turbine was selected due to the cost savings from eliminating a gearbox. A list of ceramic vane technologies has been identified for which the funding comes from DOE, NASA, the U.S. Air Force, and P&W.

  20. AIAA 20033698 Aircraft Gas Turbine Engine

    E-Print Network [OSTI]

    Stanford University

    AIAA 2003­3698 Aircraft Gas Turbine Engine Simulations W. C. Reynolds , J. J. Alonso, and M. Fatica, Reston, VA 20191­4344 #12;AIAA 2003­3698 Aircraft Gas Turbine Engine Simulations W. C. Reynolds , J. J of the flowpath through complete aircraft gas turbines including the compressor, combustor, turbine, and secondary

  1. Combined Heat and Power Plant Steam Turbine

    E-Print Network [OSTI]

    Rose, Michael R.

    Combined Heat and Power Plant Steam Turbine Steam Turbine Chiller Campus Heat Load Steam (recovered waste heat) Gas Turbine University Substation High Pressure Natural Gas Campus Electric Load Southern Generator Heat Recovery Alternative Uses: 1. Campus heating load 2. Steam turbine chiller to campus cooling

  2. Potential of innovative ceramics for turbine

    E-Print Network [OSTI]

    Potential of innovative ceramics for turbine applications. A. Jankowiak, R. Valle, M. Parlier ODAS ceramics for turbine applications. Potentiel de céramiques innovantes pour des applications turbines par A. Jankowiak, R. Valle, M. Parlier Résumé traduit : L'amélioration du rendement thermique des turbines à gaz d

  3. 5th International Meeting Wind Turbine Noise

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 5th International Meeting on Wind Turbine Noise Denver 28 ­ 30 August 2013 Wind Turbine Noise Broadband noise generated aerodynamically is the dominant noise source for a modern wind turbine(Brooks et turbines . First, a wall pressure spectral model proposed recently by Rozenberg, Robert and Moreau

  4. Installing Small Wind Turbines Seminar and Workshop

    E-Print Network [OSTI]

    Seminar and Workshop Installing Small Wind Turbines Seminar and Workshop Location: Murdoch January 2011 Details for Registration and Payment: Mr Daniel Jones, National Small Wind Turbine Test: The National Small Wind Turbine Centre at Murdoch University is holding a Small Wind Turbine short training

  5. VARIABLE SPEED WIND TURBINE

    E-Print Network [OSTI]

    Chatinderpal Singh

    Wind energy is currently the fastest-growing renewable source of energy in India; India is a key market for the wind industry, presenting substantial opportunities for both the international and domestic players. In India the research is carried out on wind energy utilization on big ways.There are still many unsolved challenges in expanding wind power, and there are numerous problems of interest to systems and control researchers. In this paper we study the pitch control mechanism of wind turbine. The pitch control system is one of the most widely used control techniques to regulate the output power of a wind turbine generator. The pitch angle is controlled to keep the generator power at rated power by reducing the angle of the blades. By regulating, the angle of stalling, fast torque changes from the wind will be reutilized. It also describes the design of the pitch controller and discusses the response of the pitch-controlled system to wind velocity variations. The pitch control system is found to have a large output power variation and a large settling time.

  6. Why Condensing Steam Turbines are More Efficient than Gas Turbines 

    E-Print Network [OSTI]

    Nelson, K. E.

    1988-01-01T23:59:59.000Z

    with gas in a combustion chamber. The gas burns and the hot combustion gases are expanded through a turbine. generating electricity. The gases exit at about 1000oF. slightly above atmospheric pressure. They enter a heat recovery unit. which is a series... statement. however, is relevant to value. GAS TURBINE CYCLE Figure :> shows the enthalpy analysis for a gas turbine cycle employing a heat recovery unit for steam generation. Air enters the compressor where it's boosted to about 190 psi and mixed...

  7. Grid-Connected Marine Current Generation System Power Smoothing Control Using Supercapacitors

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    will require the generator to accelerate/decelerate frequently under swell effect and therefore cause severe speed model are described. [n Section III, the turbine model and the generator-side power smooth controlGrid-Connected Marine Current Generation System Power Smoothing Control Using Supercapacitors

  8. INERTIAL CONTROL OF MARINE ENGINES AND PROPELLERS Damir Radan*, Asgeir J. Srensen*, Tor Arne Johansen

    E-Print Network [OSTI]

    Johansen, Tor Arne

    , such as: electrical motor drives, prime movers (engines, turbines, etc.), and generating, Propulsion, Marine, Engines, Noise, Observers 1. INTRODUCTION When vessel operates in harsh weather torsional vibrations in the stern shaft which transmits to the engine bearings, gears and vessel structure

  9. Development of a low swirl injector concept for gas turbines

    E-Print Network [OSTI]

    Cheng, R.K.; Fable, S.A.; Schmidt, D.; Arellano, L.; Smith, K.O.

    2000-01-01T23:59:59.000Z

    Injector Concept for Gas Turbines Robert K. Cheng * , Scottconcept for ultra- low NO x gas turbines. Low-swirl flamevirtually every industrial gas turbine manufacturer to meet

  10. An experimental and numerical study of wind turbine seismic behavior

    E-Print Network [OSTI]

    Prowell, I.

    2011-01-01T23:59:59.000Z

    3.2.1 Description of Test Wind Turbine . . . . . .Figure 1.2: Components of a modern wind turbine . . . . . .D.3: D.4: Wind turbine parameters . . . . . . . . . . . .

  11. An experimental and numerical study of wind turbine seismic behavior

    E-Print Network [OSTI]

    Prowell, I.

    2011-01-01T23:59:59.000Z

    and Scope Wind energy is growing and turbines are regularlyfor Design of Wind Turbines. Wind Energy Department of Risřloads on wind turbines. ” European Wind Energy Conference

  12. axis wind turbine: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    to note that these views Firestone, Jeremy 65 WIND TURBINE SITING IN AN URBAN ENVIRONMENT: THE HULL, MA 660 KW TURBINE Renewable Energy Websites Summary: 1 WIND TURBINE...

  13. approaching wind turbines: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    to note that these views Firestone, Jeremy 40 WIND TURBINE SITING IN AN URBAN ENVIRONMENT: THE HULL, MA 660 KW TURBINE Renewable Energy Websites Summary: 1 WIND TURBINE...

  14. axis wind turbines: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    to note that these views Firestone, Jeremy 65 WIND TURBINE SITING IN AN URBAN ENVIRONMENT: THE HULL, MA 660 KW TURBINE Renewable Energy Websites Summary: 1 WIND TURBINE...

  15. An experimental and numerical study of wind turbine seismic behavior

    E-Print Network [OSTI]

    Prowell, I.

    2011-01-01T23:59:59.000Z

    3.2.1 Description of Test Wind Turbine . . . . . .Figure 1.2: Components of a modern wind turbine . . . . . .Wind Turbine . . . . . . . . . . . . . . . . . . . . . . .

  16. Current Challenges in Wind Turbine Tribology | Argonne National...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Current Challenges in Wind Turbine Tribology Presented by Gary Doll of the University of Akron at the Wind Turbine Tribology Seminar 2014. Tribological Challenges in Wind Turbine...

  17. Optomechanical conversion by mechanical turbines

    E-Print Network [OSTI]

    Kneževi?, Miloš; Warner, Mark

    2014-10-30T23:59:59.000Z

    mechanical turbine-based engine to har- ness the contractions of soft, photo-responsive solids with a large stroke. We thus take photo-active nematic liq- uid crystal elastomers (LCEs) as our working material. Related engines have been proposed before... . ? mk684@cam.ac.uk material parameters of this turbine-based engine, along with the known photo-response of typical LCEs, suggests that its efficiency can be as high as 40%. The basis of these two-wheel and turbine engines is that a nematic rubber strip...

  18. Wind turbine rotor aileron

    DOE Patents [OSTI]

    Coleman, Clint (Warren, VT); Kurth, William T. (Warren, VT)

    1994-06-14T23:59:59.000Z

    A wind turbine has a rotor with at least one blade which has an aileron which is adjusted by an actuator. A hinge has two portions, one for mounting a stationary hinge arm to the blade, the other for coupling to the aileron actuator. Several types of hinges can be used, along with different actuators. The aileron is designed so that it has a constant chord with a number of identical sub-assemblies. The leading edge of the aileron has at least one curved portion so that the aileron does not vent over a certain range of angles, but vents if the position is outside the range. A cyclic actuator can be mounted to the aileron to adjust the position periodically. Generally, the aileron will be adjusted over a range related to the rotational position of the blade. A method for operating the cyclic assembly is also described.

  19. Turbine blade cooling

    DOE Patents [OSTI]

    Staub, Fred Wolf (Schenectady, NY); Willett, Fred Thomas (Niskayuna, NY)

    2000-01-01T23:59:59.000Z

    A turbine rotor blade comprises a shank portion, a tip portion and an airfoil. The airfoil has a pressure side wall and a suction side wall that are interconnected by a plurality of partition sidewalls, defining an internal cooling passageway within the airfoil. The internal cooling passageway includes at least one radial outflow passageway to direct a cooling medium flow from the shank portion towards the tip portion and at least one radial inflow passageway to direct a cooling medium flow from the tip portion towards the shank portion. A number of mixing ribs are disposed on the partition sidewalls within the radial outflow passageways so as to enhance the thermal mixing of the cooling medium flow, thereby producing improved heat transfer over a broad range of the Buoyancy number.

  20. Turbine blade cooling

    DOE Patents [OSTI]

    Staub, Fred Wolf (Schenectady, NY); Willett, Fred Thomas (Niskayuna, NY)

    1999-07-20T23:59:59.000Z

    A turbine rotor blade comprises a shank portion, a tip portion and an airfoil. The airfoil has a pressure side wall and a suction side wall that are interconnected by a plurality of partition sidewalls, defining an internal cooling passageway within the airfoil. The internal cooling passageway includes at least one radial outflow passageway to direct a cooling medium flow from the shank portion towards the tip portion and at least one radial inflow passageway to direct a cooling medium flow from the tip portion towards the shank portion. A number of mixing ribs are disposed on the partition sidewalls within the radial outflow passageways so as to enhance the thermal mixing of the cooling medium flow, thereby producing improved heat transfer over a broad range of the Buoyancy number.

  1. Turbine blade cooling

    DOE Patents [OSTI]

    Staub, F.W.; Willett, F.T.

    1999-07-20T23:59:59.000Z

    A turbine rotor blade comprises a shank portion, a tip portion and an airfoil. The airfoil has a pressure side wall and a suction side wall that are interconnected by a plurality of partition sidewalls, defining an internal cooling passageway within the airfoil. The internal cooling passageway includes at least one radial outflow passageway to direct a cooling medium flow from the shank portion towards the tip portion and at least one radial inflow passageway to direct a cooling medium flow from the tip portion towards the shank portion. A number of mixing ribs are disposed on the partition sidewalls within the radial outflow passageways so as to enhance the thermal mixing of the cooling medium flow, thereby producing improved heat transfer over a broad range of the Buoyancy number. 13 figs.

  2. Sprayed skin turbine component

    DOE Patents [OSTI]

    Allen, David B

    2013-06-04T23:59:59.000Z

    Fabricating a turbine component (50) by casting a core structure (30), forming an array of pits (24) in an outer surface (32) of the core structure, depositing a transient liquid phase (TLP) material (40) on the outer surface of the core structure, the TLP containing a melting-point depressant, depositing a skin (42) on the outer surface of the core structure over the TLP material, and heating the assembly, thus forming both a diffusion bond and a mechanical interlock between the skin and the core structure. The heating diffuses the melting-point depressant away from the interface. Subsurface cooling channels (35) may be formed by forming grooves (34) in the outer surface of the core structure, filling the grooves with a fugitive filler (36), depositing and bonding the skin (42), then removing the fugitive material.

  3. Multiple piece turbine blade

    DOE Patents [OSTI]

    Kimmel, Keith D (Jupiter, FL)

    2012-05-29T23:59:59.000Z

    A turbine rotor blade with a spar and shell construction, the spar including an internal cooling supply channel extending from an inlet end on a root section and ending near the tip end, and a plurality of external cooling channels formed on both side of the spar, where a middle external cooling channel is connected to the internal cooling supply channels through a row of holes located at a middle section of the channels. The spar and the shell are held together by hooks that define serpentine flow passages for the cooling air and include an upper serpentine flow circuit and a lower serpentine flow circuit. the serpentine flow circuits all discharge into a leading edge passage or a trailing edge passage.

  4. SERI advanced wind turbine blades

    SciTech Connect (OSTI)

    Tangler, J.; Smith, B.; Jager, D.

    1992-02-01T23:59:59.000Z

    The primary goal of the Solar Energy Research Institute`s (SERI) advanced wind turbine blades is to convert the kinetic energy in the wind into mechanical energy in an inexpensive and efficient manner. To accomplish this goal, advanced wind turbine blades have been developed by SERI that utilize unique airfoil technology. Performance characteristics of the advanced blades were verified through atmospheric testing on fixed-pitch, stall-regulated horizontal-axis wind turbines (HAWTs). Of the various wind turbine configurations, the stall-regulated HAWT dominates the market because of its simplicity and low cost. Results of the atmospheric tests show that the SERI advanced blades produce 10% to 30% more energy than conventional blades. 6 refs.

  5. SERI advanced wind turbine blades

    SciTech Connect (OSTI)

    Tangler, J.; Smith, B.; Jager, D.

    1992-02-01T23:59:59.000Z

    The primary goal of the Solar Energy Research Institute's (SERI) advanced wind turbine blades is to convert the kinetic energy in the wind into mechanical energy in an inexpensive and efficient manner. To accomplish this goal, advanced wind turbine blades have been developed by SERI that utilize unique airfoil technology. Performance characteristics of the advanced blades were verified through atmospheric testing on fixed-pitch, stall-regulated horizontal-axis wind turbines (HAWTs). Of the various wind turbine configurations, the stall-regulated HAWT dominates the market because of its simplicity and low cost. Results of the atmospheric tests show that the SERI advanced blades produce 10% to 30% more energy than conventional blades. 6 refs.

  6. High temperature turbine engine structure

    DOE Patents [OSTI]

    Carruthers, William D. (Mesa, AZ); Boyd, Gary L. (Tempe, AZ)

    1994-01-01T23:59:59.000Z

    A high temperature ceramic/metallic turbine engine includes a metallic housing which journals a rotor member of the turbine engine. A ceramic disk-like shroud portion of the engine is supported on the metallic housing portion and maintains a close running clearance with the rotor member. A ceramic spacer assembly maintains the close running clearance of the shroud portion and rotor member despite differential thermal movements between the shroud portion and metallic housing portion.

  7. High temperature turbine engine structure

    DOE Patents [OSTI]

    Carruthers, William D. (Mesa, AZ); Boyd, Gary L. (Tempe, AZ)

    1993-01-01T23:59:59.000Z

    A high temperature ceramic/metallic turbine engine includes a metallic housing which journals a rotor member of the turbine engine. A ceramic disk-like shroud portion of the engine is supported on the metallic housing portion and maintains a close running clearance with the rotor member. A ceramic spacer assembly maintains the close running clearance of the shroud portion and rotor member despite differential thermal movements between the shroud portion and metallic housing portion.

  8. High temperature turbine engine structure

    DOE Patents [OSTI]

    Carruthers, William D. (Mesa, AZ); Boyd, Gary L. (Tempe, AZ)

    1992-01-01T23:59:59.000Z

    A high temperature ceramic/metallic turbine engine includes a metallic housing which journals a rotor member of the turbine engine. A ceramic disk-like shroud portion of the engine is supported on the metallic housing portion and maintains a close running clearance with the rotor member. A ceramic spacer assembly maintains the close running clearance of the shroud portion and rotor member despite differential thermal movements between the shroud portion and metallic housing portion.

  9. Rim seal for turbine wheel

    DOE Patents [OSTI]

    Glezer, Boris (Del Mar, CA); Boyd, Gary L. (Alpine, CA); Norton, Paul F. (San Diego, CA)

    1996-01-01T23:59:59.000Z

    A turbine wheel assembly includes a disk having a plurality of blades therearound. A ceramic ring is mounted to the housing of the turbine wheel assembly. A labyrinth rim seal mounted on the disk cooperates with the ceramic ring to seal the hot gases acting on the blades from the disk. The ceramic ring permits a tighter clearance between the labyrinth rim seal and the ceramic ring.

  10. An experimental and numerical study of wind turbine seismic behavior

    E-Print Network [OSTI]

    Prowell, I.

    2011-01-01T23:59:59.000Z

    studied were vertical axis wind turbines, which are nottesting of vertical axis wind turbines (VAWT). For example,vertical axis turbines (VAWTs). Gradually, as the industry matured, most design concepts standardized on horizontal axis wind turbines (

  11. Airfoils for wind turbine

    DOE Patents [OSTI]

    Tangler, James L. (Boulder, CO); Somers, Dan M. (State College, PA)

    2000-01-01T23:59:59.000Z

    Airfoils for the tip and mid-span regions of a wind turbine blade have upper surface and lower surface shapes and contours between a leading edge and a trailing edge that minimize roughness effects of the airfoil and provide maximum lift coefficients that are largely insensitive to roughness effects. The airfoil in one embodiment is shaped and contoured to have a thickness in a range of about fourteen to seventeen percent, a Reynolds number in a range of about 1,500,000 to 2,000,000, and a maximum lift coefficient in a range of about 1.4 to 1.5. In another embodiment, the airfoil is shaped and contoured to have a thickness in a range of about fourteen percent to sixteen percent, a Reynolds number in a range of about 1,500,000 to 3,000,000, and a maximum lift coefficient in a range of about 0.7 to 1.5. Another embodiment of the airfoil is shaped and contoured to have a Reynolds in a range of about 1,500,000 to 4,000,000, and a maximum lift coefficient in a range of about 1.0 to 1.5.

  12. Turbine-Turbine Interaction and Performance Detailed (Fact Sheet), NREL Highlights, Science

    SciTech Connect (OSTI)

    Not Available

    2011-05-01T23:59:59.000Z

    Next-generation modeling capability assesses wind turbine array fluid dynamics and aero-elastic simulations.

  13. WIND TURBINE SITING IN AN URBAN ENVIRONMENT: THE HULL, MA 660 KW TURBINE

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    1 WIND TURBINE SITING IN AN URBAN ENVIRONMENT: THE HULL, MA 660 KW TURBINE J. F. Manwell, J. G. Mc turbine at Windmill Point in Hull, Massachusetts represents a high point in the long history of wind, through the installation of a 40 kW Enertech machine in the 1980's to the installation of the new turbine

  14. The Inside of a Wind Turbine

    Office of Energy Efficiency and Renewable Energy (EERE)

    Wind turbines harness the power of the wind and use it to generate electricity. Simply stated, a wind turbine works the opposite of a fan. Instead of using electricity to make wind, like a fan,...

  15. Rugged ATS turbines for alternate fuels

    SciTech Connect (OSTI)

    Wenglarz, R.A.; Nirmalan, N.V.; Daehler, T.G.

    1995-02-01T23:59:59.000Z

    A major national effort is directed to developing advanced turbine systems designed for major improvements in efficiency and emissions performance using natural gas fuels. These turbine designs are also to be adaptable for future operation with alternate coal and biomass derived fuels. For several potential alternate fuel applications, available hot gas cleanup technologies will not likely be adequate to protect the turbine flowpath from deposition and corrosion. Past tests have indicated that cooling turbine airfoil surfaces could ruggedized a high temperature turbine flowpath to alleviate deposition and corrosion. Using this specification. ATS turbine that was evaluated. The initial analyses also showed that two-phase cooling offers the most attractive method of those explored to protect a coal-fueled ATS turbine from deposition and corrosion. This paper describes ruggedization approaches, particularly to counter the extreme deposition and corrosion effects of the high inlet temperatures of ATS turbines using alternate fuels.

  16. Steam Path Audits on Industrial Steam Turbines 

    E-Print Network [OSTI]

    Mitchell, D. R.

    1992-01-01T23:59:59.000Z

    The electric utility industry has benefitted from steam path audits on steam turbines for several years. Benefits include the ability to identify areas of performance degradation during a turbine outage. Repair priorities can then be set...

  17. Parametric design of floating wind turbines

    E-Print Network [OSTI]

    Tracy, Christopher (Christopher Henry)

    2007-01-01T23:59:59.000Z

    As the price of energy increases and wind turbine technology matures, it is evident that cost effective designs for floating wind turbines are needed. The next frontier for wind power is the ocean, yet development in near ...

  18. WINDExchange Webinar: Wind Turbine Recycling and Repowering ...

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

    WINDExchange Webinar: Wind Turbine Recycling and Repowering WINDExchange Webinar: Wind Turbine Recycling and Repowering January 21, 2015 3:00PM to 5:00PM EST Add to calendar What...

  19. Naval Architecture and Marine Engineering

    E-Print Network [OSTI]

    Eustice, Ryan

    knowledge of mathematics, science, and engineering within naval architecture and marine engineering and marine engineering problems; an ability to apply basic knowledge in fluid mechanics, dynamicsNaval Architecture and Marine Engineering Undergraduate Program The University of Michigan #12

  20. Why Condensing Steam Turbines are More Efficient than Gas Turbines

    E-Print Network [OSTI]

    Nelson, K. E.

    statement. however, is relevant to value. GAS TURBINE CYCLE Figure :> shows the enthalpy analysis for a gas turbine cycle employing a heat recovery unit for steam generation. Air enters the compressor where it's boosted to about 190 psi and mixed... of preheaters. boilers and superheaters. [n this example. three levels of steam are produced. Exhaust gases vent up the stack. :1 l.:l MMBtu/hr of electricity is produced. with 70.4"'0 of the heat going to the heat recovery unit. Notice that 22...

  1. Generating Resources Combined Cycle Combustion Turbine

    E-Print Network [OSTI]

    11/17/2014 1 Generating Resources Combined Cycle Combustion Turbine Utility Scale Solar PV Steven doing recently around two key supply-side resource technologies 1. Combined Cycle Combustion Turbine #12;11/17/2014 4 Combined Cycle Combustion Turbine Background Primary Components Gas-fired combustion

  2. Wind Turbines Electrical and Mechanical Engineering

    E-Print Network [OSTI]

    Provancher, William

    Wind Turbines Electrical and Mechanical Engineering Objective · Introduce students to the concept of alternative energy. · Explain the math and scientific principles behind engineering wind turbines. Standards and how it applies to wind energy · About how surface area and shape effects wind turbine efficiency

  3. Computational Aerodynamics and Aeroacoustics for Wind Turbines

    E-Print Network [OSTI]

    wind turbine flows. A few papers deal with applications of Blade Element Momentum (BEM) theory to wind, the BEM technique is employed by industry when designing new wind turbine blades. However, in orderComputational Aerodynamics and Aeroacoustics for Wind Turbines #12;#12;Computational Aerodynamics

  4. Radial-radial single rotor turbine

    DOE Patents [OSTI]

    Platts, David A. (Los Alamos, NM)

    2006-05-16T23:59:59.000Z

    A rotor for use in turbine applications has a radial compressor/pump having radially disposed spaced apart fins forming passages and a radial turbine having hollow turbine blades interleaved with the fins and through which fluid from the radial compressor/pump flows. The rotor can, in some applications, be used to produce electrical power.

  5. Wind Turbine Blockset in Matlab/Simulink

    E-Print Network [OSTI]

    Wind Turbine Blockset in Matlab/Simulink General Overview and Description of the Models Florin Iov, Anca Daniela Hansen, Poul Sørensen, Frede Blaabjerg Aalborg University March 2004 #12;22 Wind Turbine turbine applications. This toolbox has been developed during the research project "Simulation Platform

  6. Computational Analysis of Shrouded Wind Turbine Configurations

    E-Print Network [OSTI]

    Alonso, Juan J.

    Computational Analysis of Shrouded Wind Turbine Configurations Aniket C. Aranake Vinod K. Lakshminarayan Karthik Duraisamy Computational analysis of diuser-augmented turbines is performed using high-dimensional simulations of shrouded wind turbines are performed for selected shroud geometries. The results are compared

  7. Fast Wind Turbine Design via Geometric Programming

    E-Print Network [OSTI]

    Abbeel, Pieter

    Fast Wind Turbine Design via Geometric Programming Warren Hoburg and Pieter Abbeel UC Berkeley turbine aerodynamics have an underlying convex mathematical structure that these new methods can exploit the application of GP to large wind turbine design problems a promising approach. Nomenclature (·)a, (·)t axial

  8. A Fatigue Approach to Wind Turbine Control

    E-Print Network [OSTI]

    A Fatigue Approach to Wind Turbine Control Keld Hammerum Kongens Lyngby 2006 #12;Technical to the turbulent nature of wind, the structural components of a wind turbine are exposed to highly varying loads. Therefore, fatigue damage is a major consideration when designing wind turbines. The control scheme applied

  9. Satoshi Hada Department of Gas Turbine Engineering,

    E-Print Network [OSTI]

    Thole, Karen A.

    Satoshi Hada Department of Gas Turbine Engineering, Mitsubishi Heavy Industries, Ltd., Takasago on Vane Endwall Film-Cooling Turbines are designed to operate with high inlet temperatures to improve. The endwall design considers both an upstream slot, representing the combustor--turbine junction

  10. BUILDING STRONGBUILDING STRONG Turbine Survival Program

    E-Print Network [OSTI]

    BUILDING STRONG®BUILDING STRONG® Turbine Survival Program Northwest Power and Conservation Council of the CRFM's Turbine Survival Program and how it supports the Rehabilitation Process #12;BUILDING STRONG® Turbine Survival Program TSP is an element of the CRFM Program; established to address NMFSs 1995 Biop

  11. Prototype bucket foundation for wind turbines

    E-Print Network [OSTI]

    Prototype bucket foundation for wind turbines -natural frequency estimation Lars Bo Ibsen Morten bucket foundation for wind turbines -natural frequency estimation by Lars Bo Ibsen Morten Liingaard foundation for wind turbines--natural frequency estimation" is divided into four numbered sections

  12. Sandia Wind Turbine Loads Database

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The Sandia Wind Turbine Loads Database is divided into six files, each corresponding to approximately 16 years of simulation. The files are text files with data in columnar format. The 424MB zipped file containing six data files can be downloaded by the public. The files simulate 10-minute maximum loads for the NREL 5MW wind turbine. The details of the loads simulations can be found in the paper: “Decades of Wind Turbine Loads Simulations”, M. Barone, J. Paquette, B. Resor, and L. Manuel, AIAA2012-1288 (3.69MB PDF). Note that the site-average wind speed is 10 m/s (class I-B), not the 8.5 m/s reported in the paper.

  13. Vertical axis wind turbine airfoil

    DOE Patents [OSTI]

    Krivcov, Vladimir; Krivospitski, Vladimir; Maksimov, Vasili; Halstead, Richard; Grahov, Jurij Vasiljevich

    2012-12-18T23:59:59.000Z

    A vertical axis wind turbine airfoil is described. The wind turbine airfoil can include a leading edge, a trailing edge, an upper curved surface, a lower curved surface, and a centerline running between the upper surface and the lower surface and from the leading edge to the trailing edge. The airfoil can be configured so that the distance between the centerline and the upper surface is the same as the distance between the centerline and the lower surface at all points along the length of the airfoil. A plurality of such airfoils can be included in a vertical axis wind turbine. These airfoils can be vertically disposed and can rotate about a vertical axis.

  14. ADVANCED TURBINE SYSTEMS PROGRAM

    SciTech Connect (OSTI)

    Sy Ali

    2002-03-01T23:59:59.000Z

    The market for power generation equipment is undergoing a tremendous transformation. The traditional electric utility industry is restructuring, promising new opportunities and challenges for all facilities to meet their demands for electric and thermal energy. Now more than ever, facilities have a host of options to choose from, including new distributed generation (DG) technologies that are entering the market as well as existing DG options that are improving in cost and performance. The market is beginning to recognize that some of these users have needs beyond traditional grid-based power. Together, these changes are motivating commercial and industrial facilities to re-evaluate their current mix of energy services. One of the emerging generating options is a new breed of advanced fuel cells. While there are a variety of fuel cell technologies being developed, the solid oxide fuel cells (SOFC) and molten carbonate fuel cells (MCFC) are especially promising, with their electric efficiency expected around 50-60 percent and their ability to generate either hot water or high quality steam. In addition, they both have the attractive characteristics of all fuel cells--relatively small siting footprint, rapid response to changing loads, very low emissions, quiet operation, and an inherently modular design lending itself to capacity expansion at predictable unit cost with reasonably short lead times. The objectives of this project are to:(1) Estimate the market potential for high efficiency fuel cell hybrids in the U.S.;(2) Segment market size by commercial, industrial, and other key markets;(3) Identify and evaluate potential early adopters; and(4) Develop results that will help prioritize and target future R&D investments. The study focuses on high efficiency MCFC- and SOFC-based hybrids and competing systems such as gas turbines, reciprocating engines, fuel cells and traditional grid service. Specific regions in the country have been identified where these technologies and the corresponding early adopters are likely to be located.

  15. Assessing underwater noise levels during pile-driving at an offshore windfarm and its potential effects on marine mammals

    E-Print Network [OSTI]

    Aberdeen, University of

    Assessing underwater noise levels during pile-driving at an offshore windfarm and its potential of underwater noise on marine spe- cies, particularly from pile-driving for wind turbines. Environmental population of bottlenose dol- phins. We measured pile-driving noise at distances of 0.1 (maximum broadband

  16. Congrs SHF : Energies Marines Renouvelables 2013, Brest, 09-10 octobre 2013 Zhibin Zhou LISSAGE SUPERCAPACITIF DE LA PUISSANCE PRODUITE

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Control of a Grid-Connected Marine Current Turbine System Using Supercapacitors Zhibin Zhou1,2 , Franck, the power limitation control will be applied. In the second step, Supercapacitor (SC) Energy Storage System, supercapacitor. I. INTRODUCTION During short-time period, swell waves are the main cause for variations

  17. The value of steam turbine upgrades

    SciTech Connect (OSTI)

    Potter, K.; Olear, D.; [General Physics Corp. (United States)

    2005-11-01T23:59:59.000Z

    Technological advances in mechanical and aerodynamic design of the turbine steam path are resulting in higher reliability and efficiency. A recent study conducted on a 390 MW pulverized coal-fired unit revealed just how much these new technological advancements can improve efficiency and output. The empirical study showed that the turbine upgrade raised high pressure (HP) turbine efficiency by 5%, intermediate pressure (IP) turbine efficiency by 4%, and low pressure (LP) turbine efficiency by 2.5%. In addition, the unit's highest achievable gross generation increased from 360 MW to 371 MW. 3 figs.

  18. Mixer-Ejector Wind Turbine: Breakthrough High Efficiency Shrouded Wind Turbine

    SciTech Connect (OSTI)

    None

    2010-02-22T23:59:59.000Z

    Broad Funding Opportunity Announcement Project: FloDesign Wind Turbine’s innovative wind turbine, inspired by the design of jet engines, could deliver 300% more power than existing wind turbines of the same rotor diameter by extracting more energy over a larger area. FloDesign Wind Turbine’s unique shrouded design expands the wind capture area, and the mixing vortex downstream allows more energy to flow through the rotor without stalling the turbine. The unique rotor and shrouded design also provide significant opportunity for mass production and simplified assembly, enabling mid-scale turbines (approximately 100 kW) to produce power at a cost that is comparable to larger-scale conventional turbines.

  19. Evaluating Effects of Stressors from Marine and Hydrokinetic Energy

    SciTech Connect (OSTI)

    Copping, Andrea E.; Blake, Kara M.; Hanna, Luke A.; Brandt, Charles A.; Ward, Jeffrey A.; Brandenberger, Jill M.; Gill, Gary A.; Carlson, Thomas J.; Elster, Jennifer L.; Jones, Mark E.; Watson, Bruce E.; Jepsen, Richard A.; Metzinger, Kurt

    2012-09-30T23:59:59.000Z

    Potential environmental effects of marine and hydrokinetic (MHK) energy development are not well understood, yet regulatory agencies are required to make decisions in spite of substantial uncertainty about environmental impacts and their long-term consequences. An understanding of risks associated with interactions between MHK installations and aquatic receptors, including animals, habitats, and ecosystems, can help define key uncertainties and focus regulatory actions and scientific studies on interactions of most concern. During FY 2012, Pacific Northwest National Laboratory (PNNL) continued to follow project developments on the two marine and hydrokinetic projects reviewed for Environmental Risk Evaluation System (ERES) screening analysis in FY 2011: a tidal project in the Gulf of Maine using Ocean Renewable Power Company TidGenTM turbines and a wave project planned for the coast of Oregon using Aquamarine Oyster surge devices. The ERES project in FY 2012 also examined two stressor–receptor interactions previously identified through the screening process as being of high importance: 1) the toxicity effects of antifouling coatings on MHK devices on aquatic resources and 2) the risk of a physical strike encounter between an adult killer whale and an OpenHydro turbine blade. The screening-level assessment of antifouling paints and coatings was conducted for two case studies: the Snohomish County Public Utility District No. 1 (SnoPUD) tidal turbine energy project in Admiralty Inlet, Puget Sound, Washington, and the Ocean Power Technologies (OPT) wave buoy project in Reedsport, Oregon. Results suggest minimal risk to aquatic biota from antifouling coatings used on MHK devices deployed in large estuaries or open ocean environments. For the strike assessment of a Southern Resident Killer Whale (SRKW) encountering an OpenHydro tidal turbine blade, PNNL teamed with colleagues from Sandia National Laboratories (SNL) to carry out an analysis of the mechanics and biological consequences of different blade strike scenarios. Results of these analyses found the following: 1) a SRKW is not likely to experience significant tissue injury from impact by an OpenHydro turbine blade; and 2) if whale skin behaves similarly to the materials considered as surrogates for the upper dermal layers of whale skin, it would not be torn by an OpenHydro blade strike. The PNNL/SNL analyses could not provide insight into the potential for more subtle changes to SRKWs from an encounter with a turbine, such as changes in behavior, or inform turbine interactions for other whales or other turbines. These analyses were limited by the available time frame in which results were needed and focused on the mechanical response of whale tissues and bone to blade strike. PNNL proposes that analyses of additional turbine designs and interactions with other marine mammals that differ in size, body conformation, and mass be performed.

  20. OPTIMIZATION OF OPERATIONAL CHARACTERISTICS OF SHOTBLASTING TURBINE

    E-Print Network [OSTI]

    Aleš Hribernik; Bojan A?ko; Gorazd Bombek

    A parametric study has been performed in order to optimize the operational characteristics of shotblasting turbine used for surface cleaning of metal products in foundries. The study has been focused on four main parameters: shot velocity, shot distribution, shot mass flow and turbine efficiency. Different turbine designs were experimentally studied which enabled the influence factors to be identified and then quantified by means of comparison of original and modified turbine characteristics. The step-by-step optimization was then performed which resulted in redesigned shotblasting turbine with improved operational characteristics. Up to 35 % higher maximum massflow rate of shot particles has been achieved and turbine efficiency has been improved by more than 6 %. Just slight reduction of shot flow velocity was observed (only 2 %), which confirms an important improvement of shotblasting potentials of new turbine.

  1. ADVANCED GAS TURBINE SYSTEMS RESEARCH

    SciTech Connect (OSTI)

    Unknown

    2000-01-01T23:59:59.000Z

    The activities of the Advanced Gas Turbine Systems Research (AGRSR) program are described in the quarterly report. The report is divided into discussions of Membership, Administration, Technology Transfer (Workshop/Education) and Research. Items worthy of note are presented in extended bullet format following the appropriate heading.

  2. ADVANCED GAS TURBINE SYSTEMS RESEARCH

    SciTech Connect (OSTI)

    Unknown

    2002-02-01T23:59:59.000Z

    The activities of the Advanced Gas Turbine Systems Research (AGTSR) program for this reporting period are described in this quarterly report. The report is divided into discussions of Membership, Administration, Technology Transfer (Workshop/Education), Research and Miscellaneous Related Activity. Items worthy of note are presented in extended bullet format following the appropriate heading.

  3. ADVANCED GAS TURBINE SYSTEMS RESEARCH

    SciTech Connect (OSTI)

    Unknown

    2002-04-01T23:59:59.000Z

    The activities of the Advanced Gas Turbine Systems Research (AGTSR) program for this reporting period are described in this quarterly report. The report is divided into discussions of Membership, Administration, Technology Transfer (Workshop/Education), Research and Miscellaneous Related Activity. Items worthy of note are presented in extended bullet format following the appropriate heading.

  4. Washington University Can the Sound Generated by Modern Wind Turbines

    E-Print Network [OSTI]

    Salt, Alec N.

    Washington University Can the Sound Generated by Modern Wind Turbines Affect the Health of Those turbines haveWind turbines have been getting biggerbeen getting bigger and bigger....and bigger.... Lars Needs Wind turbines are "green" and areWind turbines are "green" and are contributing to our energy

  5. DISCRETE ELEMENT MODELING OF BLADE–STRIKE FREQUENCY AND SURVIVAL OF FISH PASSING THROUGH HYDROKINETIC TURBINES

    SciTech Connect (OSTI)

    Romero Gomez, Pedro DJ; Richmond, Marshall C.

    2014-04-17T23:59:59.000Z

    Evaluating the consequences from blade-strike of fish on marine hydrokinetic (MHK) turbine blades is essential for incorporating environmental objectives into the integral optimization of machine performance. For instance, experience with conventional hydroelectric turbines has shown that innovative shaping of the blade and other machine components can lead to improved designs that generate more power without increased impacts to fish and other aquatic life. In this work, we used unsteady computational fluid dynamics (CFD) simulations of turbine flow and discrete element modeling (DEM) of particle motion to estimate the frequency and severity of collisions between a horizontal axis MHK tidal energy device and drifting aquatic organisms or debris. Two metrics are determined with the method: the strike frequency and survival rate estimate. To illustrate the procedure step-by-step, an exemplary case of a simple runner model was run and compared against a probabilistic model widely used for strike frequency evaluation. The results for the exemplary case showed a strong correlation between the two approaches. In the application case of the MHK turbine flow, turbulent flow was modeled using detached eddy simulation (DES) in conjunction with a full moving rotor at full scale. The CFD simulated power and thrust were satisfactorily comparable to experimental results conducted in a water tunnel on a reduced scaled (1:8.7) version of the turbine design. A cloud of DEM particles was injected into the domain to simulate fish or debris that were entrained into the turbine flow. The strike frequency was the ratio of the count of colliding particles to the crossing sample size. The fish length and approaching velocity were test conditions in the simulations of the MHK turbine. Comparisons showed that DEM-based frequencies tend to be greater than previous results from Lagrangian particles and probabilistic models, mostly because the DEM scheme accounts for both the geometric aspects of the passage event ---which the probabilistic method does--- as well as the fluid-particle interactions ---which the Lagrangian particle method does. The DEM-based survival rates were comparable to laboratory results for small fish but not for mid-size fish because of the considerably different turbine diameters. The modeling framework can be used for applications that aim at evaluating the biological performance of MHK turbine units during the design phase and to provide information to regulatory agencies needed for the environmental permitting process.

  6. Airfoil for a turbine of a gas turbine engine

    DOE Patents [OSTI]

    Liang, George (Palm City, FL)

    2010-12-21T23:59:59.000Z

    An airfoil for a turbine of a gas turbine engine is provided. The airfoil comprises a main body comprising a wall structure defining an inner cavity adapted to receive a cooling air. The wall structure includes a first diffusion region and at least one first metering opening extending from the inner cavity to the first diffusion region. The wall structure further comprises at least one cooling circuit comprising a second diffusion region and at least one second metering opening extending from the first diffusion region to the second diffusion region. The at least one cooling circuit may further comprise at least one third metering opening, at least one third diffusion region and a fourth diffusion region.

  7. Final Turbine and Test Facility Design Report Alden/NREC Fish Friendly Turbine

    Broader source: Energy.gov [DOE]

    The final report provides an overview of the Alden/NREC Fish Friendly turbine design phase, turbine test plan, preliminary test results, costs, schedule, and a hypothetical application at a real world project.

  8. Comparing Single and Multiple Turbine Representations in a Wind Farm Simulation: Preprint

    SciTech Connect (OSTI)

    Muljadi, E.; Parsons, B.

    2006-03-01T23:59:59.000Z

    This paper compares single turbine representation versus multiple turbine representation in a wind farm simulation.

  9. On the Fatigue Analysis of Wind Turbines

    SciTech Connect (OSTI)

    Sutherland, Herbert J.

    1999-06-01T23:59:59.000Z

    Modern wind turbines are fatigue critical machines that are typically used to produce electrical power from the wind. Operational experiences with these large rotating machines indicated that their components (primarily blades and blade joints) were failing at unexpectedly high rates, which led the wind turbine community to develop fatigue analysis capabilities for wind turbines. Our ability to analyze the fatigue behavior of wind turbine components has matured to the point that the prediction of service lifetime is becoming an essential part of the design process. In this review paper, I summarize the technology and describe the ''best practices'' for the fatigue analysis of a wind turbine component. The paper focuses on U.S. technology, but cites European references that provide important insights into the fatigue analysis of wind turbines.

  10. Cooling scheme for turbine hot parts

    DOE Patents [OSTI]

    Hultgren, Kent Goran (Winter Park, FL); Owen, Brian Charles (Orlando, FL); Dowman, Steven Wayne (Orlando, FL); Nordlund, Raymond Scott (Orlando, FL); Smith, Ricky Lee (Oviedo, FL)

    2000-01-01T23:59:59.000Z

    A closed-loop cooling scheme for cooling stationary combustion turbine components, such as vanes, ring segments and transitions, is provided. The cooling scheme comprises: (1) an annular coolant inlet chamber, situated between the cylinder and blade ring of a turbine, for housing coolant before being distributed to the turbine components; (2) an annular coolant exhaust chamber, situated between the cylinder and the blade ring and proximate the annular coolant inlet chamber, for collecting coolant exhaust from the turbine components; (3) a coolant inlet conduit for supplying the coolant to said coolant inlet chamber; (4) a coolant exhaust conduit for directing coolant from said coolant exhaust chamber; and (5) a piping arrangement for distributing the coolant to and directing coolant exhaust from the turbine components. In preferred embodiments of the invention, the cooling scheme further comprises static seals for sealing the blade ring to the cylinder and flexible joints for attaching the blade ring to the turbine components.

  11. Understanding Trends in Wind Turbine Prices Over the Past Decade

    E-Print Network [OSTI]

    Bolinger, Mark

    2012-01-01T23:59:59.000Z

    Dissecting Wind Turbine Costs. ” WindStats Newsletter, vol.A. Laxson. 2006. Wind Turbine Design Cost and Scaling Model.they can impact wind turbine costs but fall mostly outside

  12. Understanding Trends in Wind Turbine Prices Over the Past Decade

    E-Print Network [OSTI]

    Bolinger, Mark

    2012-01-01T23:59:59.000Z

    embodied in wind turbine materials (6.37 GJ/kW) from the3.5-3.7). Wind turbines are material-intensive. Eachmanufacturing these materials into turbine components may

  13. An experimental and numerical study of wind turbine seismic behavior

    E-Print Network [OSTI]

    Prowell, I.

    2011-01-01T23:59:59.000Z

    Y. (1984). “Response of a wind turbine blade to seismic andM. (2006). “Swept wind turbine blade aeroelastic modelingto fatigue for wind turbine blades than earthquake loads. In

  14. A Portable Expert System for Gas Turbine Maintenance 

    E-Print Network [OSTI]

    Quentin, G. H.

    1989-01-01T23:59:59.000Z

    Combustion turbines for electric power generation and industrial applications have steadily increased in size, efficiency and prominence. The newest class of gas turbine-generators coming into service will deliver 150 megawatts, with turbine inlet...

  15. Impacts of Wind Turbine Proximity on Property Values in Massachusetts

    E-Print Network [OSTI]

    Atkinson-Palombo, Carol

    2014-01-01T23:59:59.000Z

    of Techniques for Reduc- tion of Wind Turbine Blade Trailingon Loudness and Annoyance of Wind Turbine Noise. Acta Acus-9(2): 117-144. Impacts of Wind Turbine Proximity on Property

  16. Understanding Trends in Wind Turbine Prices Over the Past Decade

    E-Print Network [OSTI]

    Bolinger, Mark

    2012-01-01T23:59:59.000Z

    Hand, A. Laxson. 2006. Wind Turbine Design Cost and Scalingof a Multi-MegaWatt Wind Turbine. ” Renewable Energy, vol.David. 2008. “Dissecting Wind Turbine Costs. ” WindStats

  17. Dynamic analysis of a 5 megawatt offshore floating wind turbine

    E-Print Network [OSTI]

    Harriger, Evan Michael

    2011-01-01T23:59:59.000Z

    1985. 23. Hau, E. Wind Turbines: Fundamentals, Technologies,for Floating Offshore Wind Turbines. Tech. no. NREL/CP-500-Full-scale Floating Wind Turbine." Statoil, 14 Oct. 2009.

  18. Wind Turbine Manufacturing Process Monitoring

    SciTech Connect (OSTI)

    Waseem Faidi; Chris Nafis; Shatil Sinha; Chandra Yerramalli; Anthony Waas; Suresh Advani; John Gangloff; Pavel Simacek

    2012-04-26T23:59:59.000Z

    To develop a practical inline inspection that could be used in combination with automated composite material placement equipment to economically manufacture high performance and reliable carbon composite wind turbine blade spar caps. The approach technical feasibility and cost benefit will be assessed to provide a solid basis for further development and implementation in the wind turbine industry. The program is focused on the following technology development: (1) Develop in-line monitoring methods, using optical metrology and ultrasound inspection, and perform a demonstration in the lab. This includes development of the approach and performing appropriate demonstration in the lab; (2) Develop methods to predict composite strength reduction due to defects; and (3) Develop process models to predict defects from leading indicators found in the uncured composites.

  19. Gas turbine vane platform element

    DOE Patents [OSTI]

    Campbell, Christian X. (Oviedo, FL); Schiavo, Anthony L. (Oviedo, FL); Morrison, Jay A. (Oviedo, FL)

    2012-08-28T23:59:59.000Z

    A gas turbine CMC shroud plate (48A) with a vane-receiving opening (79) that matches a cross-section profile of a turbine vane airfoil (22). The shroud plate (48A) has first and second curved circumferential sides (73A, 74A) that generally follow the curves of respective first and second curved sides (81, 82) of the vane-receiving opening. Walls (75A, 76A, 77A, 78A, 80, 88) extend perpendicularly from the shroud plate forming a cross-bracing structure for the shroud plate. A vane (22) may be attached to the shroud plate by pins (83) or by hoop-tension rings (106) that clamp tabs (103) of the shroud plate against bosses (105) of the vane. A circular array (20) of shroud plates (48A) may be assembled to form a vane shroud ring in which adjacent shroud plates are separated by compressible ceramic seals (93).

  20. Steam Turbine Materials and Corrosion

    SciTech Connect (OSTI)

    Holcomb, G.H.; Hsu, D.H.

    2008-07-01T23:59:59.000Z

    Ultra-supercritical (USC) power plants offer the promise of higher efficiencies and lower emissions. Current goals of the U.S. Department of Energy’s Advanced Power Systems Initiatives include coal generation at 60% efficiency, which would require steam temperatures of up to 760 °C. In prior years this project examined the steamside oxidation of alloys for use in high- and intermediate-pressure USC turbines. This steamside oxidation research is continuing and progress is presented, with emphasis on chromia evaporation.

  1. Optomechanical conversion by mechanical turbines

    E-Print Network [OSTI]

    Milos Knezevic; Mark Warner

    2014-11-02T23:59:59.000Z

    Liquid crystal elastomers are rubbers with liquid crystal order. They contract along their nematic director when heated or illuminated. The shape changes are large and occur in a relatively narrow temperature interval, or at low illumination, around the nematic-isotropic transition. We present a conceptual design of a mechanical, turbine-based engine using photo-active liquid crystal elastomers to extract mechanical work from light. Its efficiency is estimated to be 40%.

  2. Lightning protection system for a wind turbine

    DOE Patents [OSTI]

    Costin, Daniel P. (Chelsea, VT); Petter, Jeffrey K. (Williston, VT)

    2008-05-27T23:59:59.000Z

    In a wind turbine (104, 500, 704) having a plurality of blades (132, 404, 516, 744) and a blade rotor hub (120, 712), a lightning protection system (100, 504, 700) for conducting lightning strikes to any one of the blades and the region surrounding the blade hub along a path around the blade hub and critical components of the wind turbine, such as the generator (112, 716), gearbox (708) and main turbine bearings (176, 724).

  3. Method and apparatus for wind turbine braking

    DOE Patents [OSTI]

    Barbu, Corneliu (Laguna Hills, CA); Teichmann, Ralph (Nishkayuna, NY); Avagliano, Aaron (Houston, TX); Kammer, Leonardo Cesar (Niskayuna, NY); Pierce, Kirk Gee (Simpsonville, SC); Pesetsky, David Samuel (Greenville, SC); Gauchel, Peter (Muenster, DE)

    2009-02-10T23:59:59.000Z

    A method for braking a wind turbine including at least one rotor blade coupled to a rotor. The method includes selectively controlling an angle of pitch of the at least one rotor blade with respect to a wind direction based on a design parameter of a component of the wind turbine to facilitate reducing a force induced into the wind turbine component as a result of braking.

  4. NOx reduction in gas turbine combustors

    E-Print Network [OSTI]

    Sung, Nak Won

    1976-01-01T23:59:59.000Z

    NOx REDUCTION IN GAS TURBINE COMBUSTORS A Thesis by Nak Won Sung Submitted to the Graduate College of Texas A&M University in partial fullfillment of the requirement for the degree of MASTER OF SCIENCE August 1976 Major Subject: Mechanical... Engineering NOx REDUCTION IN GAS TURBINE COMBUSTORS A Thesis by Nak Won Sung Approved as to style and content by: (Chairman of Committe (Head of Department) (Member) August 1976 "40308 (Member) 1 1. 1 ABSTRACT NOx Reduction in Gas Turbine...

  5. Small Wind Research Turbine: Final Report

    SciTech Connect (OSTI)

    Corbus, D.; Meadors, M.

    2005-10-01T23:59:59.000Z

    The Small Wind Research Turbine (SWRT) project was initiated to provide reliable test data for model validation of furling wind turbines and to help understand small wind turbine loads. This report will familiarize the user with the scope of the SWRT test and support the use of these data. In addition to describing all the testing details and results, the report presents an analysis of the test data and compares the SWRT test data to simulation results from the FAST aeroelastic simulation model.

  6. Wind Turbine Generator System Safety and Function Test Report for the Ventera VT10 Wind Turbine

    SciTech Connect (OSTI)

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

    2012-11-01T23:59:59.000Z

    This report summarizes the results of a safety and function test that NREL conducted on the Ventera VT10 wind turbine. This test was conducted in accordance with the International Electrotechnical Commissions' (IEC) standard, Wind Turbine Generator System Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed.2.0, 2006-03.

  7. Wind Turbine Generator System Safety and Function Test Report for the Entegrity EW50 Wind Turbine

    SciTech Connect (OSTI)

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

    2012-11-01T23:59:59.000Z

    This report summarizes the results of a safety and function test that NREL conducted on the Entegrity EW50 wind turbine. This test was conducted in accordance with the International Electrotechnical Commissions' (IEC) standard, Wind Turbine Generator System Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed.2.0, 2006-03.

  8. Technologies for Evaluating Fish Passage Through Turbines

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

    This document was printed on recycled paper. Technologies for Evaluating Fish Passage Through Turbines M. A. Weiland T. J. Carlson October 2003 Prepared for: Pacific...

  9. Sandia National Laboratories: increasing average wind turbine...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    wind turbine power rating Latest Version of the Composite Materials Database Available for Download On December 3, 2014, in Energy, Materials Science, News, News & Events,...

  10. Improving Wind Turbine Gearbox Reliability: Preprint

    SciTech Connect (OSTI)

    Musial, W.; Butterfield, S.; McNiff, B.

    2007-06-01T23:59:59.000Z

    This paper describes a new research and development initiative to improve gearbox reliability in wind turbines begun at the National Renewable Energy Laboratory (NREL) in Golden, Colorado, USA.

  11. Jet spoiler arrangement for wind turbine

    DOE Patents [OSTI]

    Cyrus, Jack D. (Corrales, NM); Kadlec, Emil G. (Albuquerque, NM); Klimas, Paul C. (Albuquerque, NM)

    1985-01-01T23:59:59.000Z

    An air jet spoiler arrangement is provided for a Darrieus-type vertical axis wind-powered turbine. Air is drawn into hollow turbine blades through air inlets at the ends thereof and is ejected in the form of air jets through small holes or openings provided along the lengths of the blades. The air jets create flow separation at the surfaces of the turbine blades, thereby inducing stall conditions and reducing the output power. A feedback control unit senses the power output of the turbine and controls the amount of air drawn into the air inlets accordingly.

  12. Water turbine system and method of operation

    DOE Patents [OSTI]

    Costin, Daniel P. (Montpelier, VT)

    2011-05-10T23:59:59.000Z

    A system for providing electrical power from a current turbine is provided. The system includes a floatation device and a mooring. A water turbine structure is provided having an upper and lower portion wherein the lower portion includes a water fillable chamber. A plurality of cables are used to couple the system where a first cable couples the water turbine to the mooring and a second cable couples the floatation device to the first cable. The system is arranged to allow the turbine structure to be deployed and retrieved for service, repair, maintenance and redeployment.

  13. Water turbine system and method of operation

    DOE Patents [OSTI]

    Costin, Daniel P.

    2010-06-15T23:59:59.000Z

    A system for providing electrical power from a current turbine is provided. The system includes a floatation device and a mooring. A water turbine structure is provided having an upper and lower portion wherein the lower portion includes a water fillable chamber. A plurality of cables are used to couple the system where a first cable couples the water turbine to the mooring and a second cable couples the floatation device to the first cable. The system is arranged to allow the turbine structure to be deployed and retrieved for service, repair, maintenance and redeployment.

  14. Water turbine system and method of operation

    DOE Patents [OSTI]

    Costin, Daniel P. (Montpelier, VT)

    2009-02-10T23:59:59.000Z

    A system for providing electrical power from a current turbine is provided. The system includes a floatation device and a mooring. A water turbine structure is provided having an upper and lower portion wherein the lower portion includes a water fillable chamber. A plurality of cables are used to couple the system where a first cable couples the water turbine to the mooring and a second cable couples the floatation device to the first cable. The system is arranged to allow the turbine structure to be deployed and retrieved for service, repair, maintenance and redeployment.

  15. Jet spoiler arrangement for wind turbine

    DOE Patents [OSTI]

    Cyrus, J.D.; Kadlec, E.G.; Klimas, P.C.

    1983-09-15T23:59:59.000Z

    An air jet spoiler arrangement is provided for a Darrieus-type vertical axis wind-powered turbine. Air is drawn into hollow turbine blades through air inlets at the end thereof and is ejected in the form of air jets through small holes or openings provided along the lengths of the blades. The air jets create flow separation at the surfaces of the turbine blades, thereby including stall conditions and reducing the output power. A feedback control unit senses the power output of the turbine and controls the amount of air drawn into the air inlets accordingly.

  16. Sandia National Laboratories: Wind Turbine Blade Design

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Wind Turbine Blade Design National Rotor Testbed Functional Scaling Presented at American Institute of Aeronautics and Astronautics 2014 Scitech On April 15, 2014, in Energy,...

  17. Turbine bucket natural frequency tuning rib

    DOE Patents [OSTI]

    Wang, John Zhiqiang (Greenville, SC); Norton, Paul Francis (Greenville, SC); Barb, Kevin Joseph (Halfmoon, NY); Jacala, Ariel Caesar-Prepena (Simpsonville, SC)

    2002-01-01T23:59:59.000Z

    A tuning rib is added preferably in the aft cavity of a cored turbine bucket to alter the bucket's natural frequencies. The tuning rib may be a solid rib or a segmented rib and is particularly suited for altering high order frequency modes such as 2T, 4F and 1-3S. As such, detrimental crossings of natural bucket frequencies and gas turbine stimuli can be avoided to thereby improve the reliability of a gas turbine without impacting other features of the bucket that are important to the performance of the gas turbine.

  18. Evaluation of Turbine Blades Using Computed Tomography

    E-Print Network [OSTI]

    C. Muralidhar; S. N. Lukose; M. P. Subramanian

    2006-01-01T23:59:59.000Z

    Turbine blades are high value castings having complex internal geometry. Computed Tomography has been employed on Turbine blades for finding out defects and internal details. The wall thickness, rib thickness and radius of curvature are measured from the CT slices. The discontinuities including blockages of cooling passages in the cast material can be detected. 3D visualization of the turbine blade provides in extracting its internal features including inaccessible areas nondestructively, which is not possible through conventional NDE methods. The salient features for evaluation of turbine blades using Tomography are brought out.

  19. Sandia National Laboratories: wind turbine blade materials

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    materials Wind-Turbine Blade Materials and Reliability Progress On May 21, 2014, in Energy, Materials Science, News, News & Events, Partnership, Renewable Energy, Research &...

  20. Sandia Energy - Innovative Offshore Vertical-Axis Wind Turbine...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Vertical-Axis Wind Turbine Rotors Home Stationary Power Energy Conversion Efficiency Wind Energy Offshore Wind Innovative Offshore Vertical-Axis Wind Turbine Rotors Innovative...

  1. Technologies for Evaluating Fish Passage Through Turbines | Department...

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

    Technologies for Evaluating Fish Passage Through Turbines Technologies for Evaluating Fish Passage Through Turbines This report evaluated the feasibility of two types of...

  2. New Report States That Hydrokinetic Turbines Have Minimal Environmenta...

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

    Report States That Hydrokinetic Turbines Have Minimal Environmental Impacts on Fish New Report States That Hydrokinetic Turbines Have Minimal Environmental Impacts on Fish August...

  3. An experimental and numerical study of wind turbine seismic behavior

    E-Print Network [OSTI]

    Prowell, I.

    2011-01-01T23:59:59.000Z

    assumes linear material response of the turbine tower evennon-linear material behavior in conjunction with turbinefor design of a turbine. When non-linear material behavior

  4. Sandia National Laboratories: larger and heavier turbine blades...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    larger and heavier turbine blades experience increased edgewise fatigue loading New Material Tests Show Biaxial Laminate Creep Is Important for Large Wind-Turbine Blades On April...

  5. Use of SCADA Data for Failure Detection in Wind Turbines

    SciTech Connect (OSTI)

    Kim, K.; Parthasarathy, G.; Uluyol, O.; Foslien, W.; Sheng, S.; Fleming, P.

    2011-10-01T23:59:59.000Z

    This paper discusses the use of existing wind turbine SCADA data for development of fault detection and diagnostic techniques for wind turbines.

  6. Hydrogen Storage in Wind Turbine Towers: Cost Analysis and Conceptual...

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

    in Wind Turbine Towers: Cost Analysis and Conceptual Design Hydrogen Storage in Wind Turbine Towers: Cost Analysis and Conceptual Design Preprint 34851.pdf More Documents &...

  7. Sandia National Laboratories: test wind turbine blade structures...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    wind turbine blade structures at an intermediate scale Wind-Turbine Blade Materials and Reliability Progress On May 21, 2014, in Energy, Materials Science, News, News & Events,...

  8. Sandia National Laboratories: horizontal-axis wind turbine

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    horizontal-axis wind turbine Study Compares Floating-Platform Options for Offshore Vertical-Axis Wind Turbines On December 3, 2014, in Energy, News, News & Events, Partnership,...

  9. Argonne Researchers Shine "Light" on Origins of Wind Turbine...

    Broader source: Energy.gov (indexed) [DOE]

    Argonne Researchers Shine "Light" on Origins of Wind Turbine Bearing Failures Argonne Researchers Shine "Light" on Origins of Wind Turbine Bearing Failures September 12, 2014 -...

  10. Demonstration of a Variable Phase Turbine Power System for Low...

    Broader source: Energy.gov (indexed) [DOE]

    Demonstration of a Variable Phase Turbine Power System for Low Temperature Geothermal Resources Demonstration of a Variable Phase Turbine Power System for Low Temperature...

  11. SWiFT Turbines Full Dynamic Characterization Opens Doors for...

    Energy Savers [EERE]

    of gravity, moment of inertia, natural frequencies, and mode shapes of each main turbine component tested individually and throughout turbine assembly. The unique nature of...

  12. DOE Seeking Proposals to Advance Distributed Wind Turbine Technology...

    Office of Environmental Management (EM)

    Seeking Proposals to Advance Distributed Wind Turbine Technology and Manufacturing DOE Seeking Proposals to Advance Distributed Wind Turbine Technology and Manufacturing December...

  13. SMART Wind Turbine Rotor: Design and Field Test | Department...

    Broader source: Energy.gov (indexed) [DOE]

    Design and Field Test SMART Wind Turbine Rotor: Design and Field Test This report documents the design, fabrication, and testing of the SMART Wind Turbine Rotor. This work...

  14. Consider Installing High-Pressure Boilers with BackpressureTurbine...

    Broader source: Energy.gov (indexed) [DOE]

    High-Pressure Boilers with Backpressure Turbine-Generators Consider Installing High-Pressure Boilers with Backpressure Turbine-Generators This tip sheet outlines the benefits of...

  15. Testimonials - Partnerships in R&D - Capstone Turbine Corporation...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    R&D - Capstone Turbine Corporation Testimonials - Partnerships in R&D - Capstone Turbine Corporation Addthis Text Version The words Office of Energy Efficiency and Renewable Energy...

  16. Advanced Control Design and Testing for Wind Turbines at the...

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

    Control Design and Testing for Wind Turbines at the National Renewable Energy Laboratory: Preprint Advanced Control Design and Testing for Wind Turbines at the National Renewable...

  17. Sandia Energy - Innovative Offshore Vertical-Axis Wind Turbine...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Innovative Offshore Vertical-Axis Wind Turbine Rotors Home Stationary Power Energy Conversion Efficiency Wind Energy Offshore Wind Innovative Offshore Vertical-Axis Wind Turbine...

  18. Dynamic analysis of a 5 megawatt offshore floating wind turbine

    E-Print Network [OSTI]

    Harriger, Evan Michael

    2011-01-01T23:59:59.000Z

    Offshore wind turbines have the potential to generateuncover potential problems that exist with offshore windwind turbines in operation, this technology has the potential

  19. Method for detecting gas turbine engine flashback

    DOE Patents [OSTI]

    Singh, Kapil Kumar; Varatharajan, Balachandar; Kraemer, Gilbert Otto; Yilmaz, Ertan; Lacy, Benjamin Paul

    2012-09-04T23:59:59.000Z

    A method for monitoring and controlling a gas turbine, comprises predicting frequencies of combustion dynamics in a combustor using operating conditions of a gas turbine, receiving a signal from a sensor that is indicative of combustion dynamics in the combustor, and detecting a flashback if a frequency of the received signal does not correspond to the predicted frequencies.

  20. Energy 101: Wind Turbines - 2014 Update

    SciTech Connect (OSTI)

    None

    2014-05-06T23:59:59.000Z

    See how wind turbines generate clean electricity from the power of wind. The video highlights the basic principles at work in wind turbines, and illustrates how the various components work to capture and convert wind energy to electricity. This updated version also includes information on the Energy Department's efforts to advance offshore wind power. Offshore wind energy footage courtesy of Vestas.

  1. Energy 101: Wind Turbines - 2014 Update

    ScienceCinema (OSTI)

    None

    2014-06-05T23:59:59.000Z

    See how wind turbines generate clean electricity from the power of wind. The video highlights the basic principles at work in wind turbines, and illustrates how the various components work to capture and convert wind energy to electricity. This updated version also includes information on the Energy Department's efforts to advance offshore wind power. Offshore wind energy footage courtesy of Vestas.

  2. Offshore Wind Turbines: Some Technical Challenges

    E-Print Network [OSTI]

    Houlsby, Guy T.

    1 Offshore Wind Turbines: Some Technical Challenges Prof. Guy Houlsby FREng Oxford University House engineers concerned with installation of offshore wind turbines. The author is Professor of Civil University Civil Engineering Offshore wind power · Scale of offshore wind power developments · Engineering

  3. Influence of refraction on wind turbine noise

    E-Print Network [OSTI]

    Makarewicz, Rufin

    2013-01-01T23:59:59.000Z

    A semi-empirical method is applied to calculate the time-average sound level of wind turbine noise generation and propagation. Both are affected by wind shear refraction. Under upwind conditions the partially ensonified zone separates the fully ensonified zone (close to the turbine) and the shadow zone (far away from the turbine). Refraction is described in terms of the wind speed linear profile fitted to the power law profile. The rotating blades are treated as a two-dimensional circular source in the vertical plane. Inside the partially ensonified zone the effective A-weighted sound power decreases to zero when the receiver moves from the turbine toward the shadow zone. The presented results would be useful in practical applications to give a quick estimate of the effect of refraction on wind turbine noise.

  4. Low thermal stress ceramic turbine nozzle

    DOE Patents [OSTI]

    Glezer, Boris (Del Mar, CA); Bagheri, Hamid (San Diego, CA); Fierstein, Aaron R. (San Diego, CA)

    1996-01-01T23:59:59.000Z

    A turbine nozzle vane assembly having a preestablished rate of thermal expansion is positioned in a gas turbine engine and being attached to conventional metallic components. The metallic components having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the turbine nozzle vane assembly. The turbine nozzle vane assembly includes an outer shroud and an inner shroud having a plurality of vanes therebetween. Each of the plurality of vanes have a device for heating and cooling a portion of each of the plurality of vanes. Furthermore, the inner shroud has a plurality of bosses attached thereto. A cylindrical member has a plurality of grooves formed therein and each of the plurality of bosses are positioned in corresponding ones of the plurality of grooves. The turbine nozzle vane assembly provides an economical, reliable and effective ceramic component having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the other component.

  5. Designing an ultrasupercritical steam turbine

    SciTech Connect (OSTI)

    Klotz, H.; Davis, K.; Pickering, E. [Alstom (Germany)

    2009-07-15T23:59:59.000Z

    Carbon emissions produced by the combustion of coal may be collected and stored in the future, but a better approach is to reduce the carbon produced through efficient combustion technologies. Increasing the efficiency of new plants using ultrasupercritical (USC) technology will net less carbon released per megawatt-hour using the world's abundant coal reserves while producing electricity at the lowest possible cost. The article shows how increasing the steam turbine operating conditions for a new USC project in the USA and quantify the potential CO{sub 2} reduction this advanced design makes possible. 7 figs., 3 tabs.

  6. Blade for a gas turbine

    DOE Patents [OSTI]

    Liang, George (Palm City, FL)

    2010-10-26T23:59:59.000Z

    A blade is provided for a gas turbine. The blade comprises a main body comprising a cooling fluid entrance channel; a cooling fluid collector in communication with the cooling fluid entrance channel; a plurality of side channels extending through an outer wall of the main body and communicating with the cooling fluid collector and a cooling fluid cavity; a cooling fluid exit channel communicating with the cooling fluid cavity; and a plurality of exit bores extending from the cooling fluid exit channel through the main body outer wall.

  7. Multiple piece turbine rotor blade

    DOE Patents [OSTI]

    Jones, Russell B; Fedock, John A

    2013-05-21T23:59:59.000Z

    A multiple piece turbine rotor blade with a shell having an airfoil shape and secured between a spar and a platform with the spar including a tip end piece. a snap ring fits around the spar and abuts against the spar tip end piece on a top side and abuts against a shell on the bottom side so that the centrifugal loads from the shell is passed through the snap ring and into the spar and not through a tip cap dovetail slot and projection structure.

  8. Hydrogen Turbines | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently20,000 RussianBy: Thomas P.Department of Energy InternetHydrogen Turbines The

  9. How to Build a Turbine

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC) EnvironmentalGyroSolé(tm) HarmonicbetandEnergy 2010a Wind Turbine

  10. Western Turbine | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTown ofNationwideWTED JumpHills, NewWestbrook, Minnesota:WesternSolargenicsTurbine

  11. Gas Turbines Increase the Energy Efficiency of Industrial Processes 

    E-Print Network [OSTI]

    Banchik, I. N.; Bohannan, W. R.; Stork, K.; McGovern, L. J.

    1981-01-01T23:59:59.000Z

    clean fuel gas for the gas turbine is produced by gasification of coal, are presented. Waste heat from the gasifier and the gas turbine exhaust is converted to high pressure steam for steam turbines. Gas turbines may find application in other industrial...

  12. Loads Analysis of Several Offshore Floating Wind Turbine Concepts

    SciTech Connect (OSTI)

    Robertson, A. N.; Jonkman, J. M.

    2011-10-01T23:59:59.000Z

    This paper presents a comprehensive dynamic-response analysis of six offshore floating wind turbine concepts.

  13. Design of heterogeneous turbine blade Xiaoping Qian, Deba Dutta*

    E-Print Network [OSTI]

    Qian, Xiaoping

    Design of heterogeneous turbine blade Xiaoping Qian, Deba Dutta* Department of Mechanical in turbine drivers push the material capabilities of turbine blades to the limit. The recent development of heterogeneous objects by layered manufacturing offers new potentials for the turbine blades. In heterogeneous

  14. Modelling and Control of an Inverted Pendulum Turbine

    E-Print Network [OSTI]

    Modelling and Control of an Inverted Pendulum Turbine Sergi Rotger Griful Kongens Lyngby 2012 IMM. In this project the feasibility of a new kind of wind turbine is studied. This thesis deals with the achievement of getting a proper mathematical model of a new kind of wind turbine, called the inverted pendulum turbine

  15. A low order model for vertical axis wind turbines

    E-Print Network [OSTI]

    Drela, Mark

    A new computational model for initial sizing and performance prediction of vertical axis wind turbines

  16. Advanced Wind Turbine Controls Reduce Loads (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-03-01T23:59:59.000Z

    NREL's National Wind Technology Center provides the world's only dedicated turbine controls testing platforms.

  17. Doctoral Position Aeroelastic Analysis of Large Wind Turbines

    E-Print Network [OSTI]

    Doctoral Position Aeroelastic Analysis of Large Wind Turbines In the research project "Aeroelastic Analysis Horizontal-axis wind turbine and numerical model. of Large Wind Turbines" funded by the Ger- man involving the in-house Finite-Element CFD code XNS to enable the simulation of wind turbines. The ability

  18. San Nicolas Marine Science

    E-Print Network [OSTI]

    California at Santa Barbara, University of

    College of Creative Studies 555 465 Housing & Residential Services 411 429LOT 3 LOT 9 LOT 7 LOT 23 LOT 27 Lehmann Concert Hall Multi- Cultural Theater Corwin Pavillion University House Centennial House Marine Center for Biodiversity and Ecological Restoration (CCBER) manages and restores the campus natural areas

  19. Biogeography of Marine Algae

    E-Print Network [OSTI]

    Biogeography of Marine Algae David J Garbary, St Francis Xavier University, Antigonish, Nova Scotia and vicariance in establishing distributions and as factors associated with speciation. Since eukaryotic algae. There are many species that are virtually cosmopolitan (e.g. the green alga Enteromorpha intestinalis, the red

  20. Gas fired Advanced Turbine System

    SciTech Connect (OSTI)

    LeCren, R.T.; White, D.J.

    1993-01-01T23:59:59.000Z

    The primary objective of the first phase of the Advanced Gas Turbine System (ATS) program was the concept definition of an advanced engine system that meets efficiency and emission goals far exceeding those that can be provided with today`s equipment. The thermal efficiency goal for such an advanced industrial engine was set at 50% some 15 percentage points higher than current equipment levels. Exhaust emissions goals for oxides of nitrogen (NO{sub x}), carbon monoxide (CO), and unburned hydrocarbons (UH) were fixed at 8 parts per million by volume (ppmv), 20 ppmv, and 20 ppmv respectively, corrected to 15% oxygen (O{sub 2}) levels. Other goals had to be addressed; these involved reducing the cost of power produced by 10 percent and improving or maintaining the reliability, availability, and maintainability (RAM) at current levels. This advanced gas turbine was to be fueled with natural gas, and it had to embody features that would allow it bum coal or coal derived fuels.

  1. SumTime-Turbine: A Knowledge-Based System to Communicate Gas Turbine Time-Series Data

    E-Print Network [OSTI]

    Reiter, Ehud

    SumTime-Turbine: A Knowledge-Based System to Communicate Gas Turbine Time-Series Data Jin Yu of Aberdeen Aberdeen, AB24 3UE, UK {jyu, ereiter, jhunter, ssripada}@csd.abdn.ac.uk Abstract: SumTime-Turbine produces textual summaries of archived time- series data from gas turbines. These summaries should help

  2. 1Design limits and solutions for very large wind turbines Design limits and solutions for very large wind turbines

    E-Print Network [OSTI]

    Leu, Tzong-Shyng "Jeremy"

    #12;#12;1Design limits and solutions for very large wind turbines UpWind Design limits and solutions for very large wind turbines A 20 MW turbine is feasible March 2011 Supported by: #12;March 20112 Photo:Nordex #12;3Design limits and solutions for very large wind turbines Contents 1. UpWind: Summary

  3. Computational Tools to Assess Turbine Biological Performance

    SciTech Connect (OSTI)

    Richmond, Marshall C.; Serkowski, John A.; Rakowski, Cynthia L.; Strickler, Brad; Weisbeck, Molly; Dotson, Curtis L.

    2014-07-24T23:59:59.000Z

    Public Utility District No. 2 of Grant County (GCPUD) operates the Priest Rapids Dam (PRD), a hydroelectric facility on the Columbia River in Washington State. The dam contains 10 Kaplan-type turbine units that are now more than 50 years old. Plans are underway to refit these aging turbines with new runners. The Columbia River at PRD is a migratory pathway for several species of juvenile and adult salmonids, so passage of fish through the dam is a major consideration when upgrading the turbines. In this paper, a method for turbine biological performance assessment (BioPA) is demonstrated. Using this method, a suite of biological performance indicators is computed based on simulated data from a CFD model of a proposed turbine design. Each performance indicator is a measure of the probability of exposure to a certain dose of an injury mechanism. Using known relationships between the dose of an injury mechanism and frequency of injury (dose–response) from laboratory or field studies, the likelihood of fish injury for a turbine design can be computed from the performance indicator. By comparing the values of the indicators from proposed designs, the engineer can identify the more-promising alternatives. We present an application of the BioPA method for baseline risk assessment calculations for the existing Kaplan turbines at PRD that will be used as the minimum biological performance that a proposed new design must achieve.

  4. NEXT GENERATION GAS TURBINE SYSTEMS STUDY

    SciTech Connect (OSTI)

    Benjamin C. Wiant; Ihor S. Diakunchak; Dennis A. Horazak; Harry T. Morehead

    2003-03-01T23:59:59.000Z

    Under sponsorship of the U.S. Department of Energy's National Energy Technology Laboratory, Siemens Westinghouse Power Corporation has conducted a study of Next Generation Gas Turbine Systems that embraces the goals of the DOE's High Efficiency Engines and Turbines and Vision 21 programs. The Siemens Westinghouse Next Generation Gas Turbine (NGGT) Systems program was a 24-month study looking at the feasibility of a NGGT for the emerging deregulated distributed generation market. Initial efforts focused on a modular gas turbine using an innovative blend of proven technologies from the Siemens Westinghouse W501 series of gas turbines and new enabling technologies to serve a wide variety of applications. The flexibility to serve both 50-Hz and 60-Hz applications, use a wide range of fuels and be configured for peaking, intermediate and base load duty cycles was the ultimate goal. As the study progressed the emphasis shifted from a flexible gas turbine system of a specific size to a broader gas turbine technology focus. This shift in direction allowed for greater placement of technology among both the existing fleet and new engine designs, regardless of size, and will ultimately provide for greater public benefit. This report describes the study efforts and provides the resultant conclusions and recommendations for future technology development in collaboration with the DOE.

  5. An acoustic energy framework for predicting combustion- driven acoustic instabilities in premixed gas-turbines

    E-Print Network [OSTI]

    Ibrahim, Zuhair M. A.

    2007-01-01T23:59:59.000Z

    of Engineering for Gas Turbines and Power, 2000. Vol. 122:of Engineering for Gas Turbines and Power, 2000. Vol. 122:in Lean Premixed Gas Turbine Combustors," Journal of

  6. Technology Adoption and Regulatory Regimes: Gas Turbines Electricity Generators from 1980 to 2001

    E-Print Network [OSTI]

    Ishii, Jun

    2004-01-01T23:59:59.000Z

    Scheibel (1997) “Current Gas Turbine Developments and Futurefor Heavy-Duty Gas Turbines,” October 2000. Available onlineNext Evolution of the F Gas Turbine,” April 2001. Available

  7. Economic Impacts of Wind Turbine Development in U.S. Counties

    E-Print Network [OSTI]

    J., Brown

    2012-01-01T23:59:59.000Z

    15 percent)). Cumulative wind turbine capacity installed inper capita income of wind turbine development (measured inour sample, cumulative wind turbine capacity on a per person

  8. Dynamic response analysis of a 900 kW wind turbine subject to ground excitation

    E-Print Network [OSTI]

    Caudillo, Adrian Felix

    2012-01-01T23:59:59.000Z

    powered by wind energy, wind turbines themselves stillWind Energy and Earthquake Activity Wind Turbines areTurbines. Det Norsk Veritas, Copen- hagen and Wind Energy

  9. Prime Movers of Globalization: The History and Impact of Diesel Engines and Gas Turbines

    E-Print Network [OSTI]

    Anderson, Byron P.

    2011-01-01T23:59:59.000Z

    jet airplanes. Gas turbines and diesel engines eventuallyof Diesel Engines and Gas Turbines By Vaclav Smil Reviewedof Diesel Engines and Gas Turbines. Cambridge, MA: The MIT

  10. DOE/SNL-TTU scaled wind farm technology facility : research opportunities for study of turbine-turbine interaction.

    SciTech Connect (OSTI)

    Barone, Matthew Franklin; White, Jonathan

    2011-09-01T23:59:59.000Z

    The proposed DOE/Sandia Scaled Wind Farm Technology Facility (SWiFT) hosted by Texas Tech University at Reese Technology Center in Lubbock, TX, will provide a facility for experimental study of turbine-turbine interaction and complex wind farm aerodynamics. This document surveys the current status of wind turbine wake and turbine-turbine interaction research, identifying knowledge and data gaps that the proposed test site can potentially fill. A number of turbine layouts is proposed, allowing for up to ten turbines at the site.

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

    SciTech Connect (OSTI)

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

    2010-07-01T23:59:59.000Z

    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.

  12. Advanced Micro Turbine System (AMTS) -C200 Micro Turbine -Ultra-Low Emissions Micro Turbine

    SciTech Connect (OSTI)

    Capstone Turbine Corporation

    2007-12-31T23:59:59.000Z

    In September 2000 Capstone Turbine Corporation commenced work on a US Department of Energy contract to develop and improve advanced microturbines for power generation with high electrical efficiency and reduced pollutants. The Advanced MicroTurbine System (AMTS) program focused on: (1) The development and implementation of technology for a 200 kWe scale high efficiency microturbine system (2) The development and implementation of a 65 kWe microturbine which meets California Air Resources Board (CARB) emissions standards effective in 2007. Both of these objectives were achieved in the course of the AMTS program. At its conclusion prototype C200 Microturbines had been designed, assembled and successfully completed field demonstration. C65 Microturbines operating on natural, digester and landfill gas were also developed and successfully tested to demonstrate compliance with CARB 2007 Fossil Fuel Emissions Standards for NOx, CO and VOC emissions. The C65 Microturbine subsequently received approval from CARB under Executive Order DG-018 and was approved for sale in California. The United Technologies Research Center worked in parallel to successfully execute a RD&D program to demonstrate the viability of a low emissions AMS which integrated a high-performing microturbine with Organic Rankine Cycle systems. These results are documented in AMS Final Report DOE/CH/11060-1 dated March 26, 2007.

  13. Combustion modeling in advanced gas turbine systems

    SciTech Connect (OSTI)

    Smoot, L.D.; Hedman, P.O.; Fletcher, T.H.; Brewster, B.S.; Kramer, S.K. [Brigham Young Univ., Provo, UT (United States). Advanced Combustion Engineering Research Center

    1995-12-31T23:59:59.000Z

    Goal of DOE`s Advanced Turbine Systems program is to develop and commercialize ultra-high efficiency, environmentally superior, cost competitive gas turbine systems for base-load applications in utility, independent power producer, and industrial markets. Primary objective of the program here is to develop a comprehensive combustion model for advanced gas turbine combustion systems using natural gas (coal gasification or biomass fuels). The efforts included code evaluation (PCGC-3), coherent anti-Stokes Raman spectroscopy, laser Doppler anemometry, and laser-induced fluorescence.

  14. Gas turbine engines with particle traps

    DOE Patents [OSTI]

    Boyd, Gary L. (Tempe, AZ); Sumner, D. Warren (Phoenix, AZ); Sheoran, Yogendra (Scottsdale, AZ); Judd, Z. Daniel (Phoenix, AZ)

    1992-01-01T23:59:59.000Z

    A gas turbine engine (10) incorporates a particle trap (46) that forms an entrapment region (73) in a plenum (24) which extends from within the combustor (18) to the inlet (32) of a radial-inflow turbine (52, 54). The engine (10) is thereby adapted to entrap particles that originate downstream from the compressor (14) and are otherwise propelled by combustion gas (22) into the turbine (52, 54). Carbonaceous particles that are dislodged from the inner wall (50) of the combustor (18) are incinerated within the entrapment region (73) during operation of the engine (10).

  15. Gas turbine bucket wall thickness control

    DOE Patents [OSTI]

    Stathopoulos, Dimitrios (Glenmont, NY); Xu, Liming (Greenville, SC); Lewis, Doyle C. (Greer, SC)

    2002-01-01T23:59:59.000Z

    A core for use in casting a turbine bucket including serpentine cooling passages is divided into two pieces including a leading edge core section and a trailing edge core section. Wall thicknesses at the leading edge and the trailing edge of the turbine bucket can be controlled independent of each other by separately positioning the leading edge core section and the trailing edge core section in the casting die. The controlled leading and trailing edge thicknesses can thus be optimized for efficient cooling, resulting in more efficient turbine operation.

  16. Electrical Cost Reduction Via Steam Turbine Cogeneration

    E-Print Network [OSTI]

    Ewing, T. S.; Di Tullio, L. B.

    ELECTRICAL COST REDUCTION VIA STEAM TURBINE COGENERATION LYNN B. DI TULLIO, P.E. Project Engineer Ewing Power Systems, Inc. South Deerfield, Mass. ABSTRACT Steam turbine cogeneration is a well established technology which is widely used... to replace pressure reducing valves with turbine generator sets in applications with flows as low as 4000 pounds of steam per hour. These systems produce electricity for $0.01 to $.02 per kWh (based on current costs of gas and oil); system cost is between...

  17. High efficiency turbine blade coatings.

    SciTech Connect (OSTI)

    Youchison, Dennis L.; Gallis, Michail A.

    2014-06-01T23:59:59.000Z

    The development of advanced thermal barrier coatings (TBCs) of yttria stabilized zirconia (YSZ) that exhibit lower thermal conductivity through better control of electron beam - physical vapor deposition (EB-PVD) processing is of prime interest to both the aerospace and power industries. This report summarizes the work performed under a two-year Lab-Directed Research and Development (LDRD) project (38664) to produce lower thermal conductivity, graded-layer thermal barrier coatings for turbine blades in an effort to increase the efficiency of high temperature gas turbines. This project was sponsored by the Nuclear Fuel Cycle Investment Area. Therefore, particular importance was given to the processing of the large blades required for industrial gas turbines proposed for use in the Brayton cycle of nuclear plants powered by high temperature gas-cooled reactors (HTGRs). During this modest (~1 full-time equivalent (FTE)) project, the processing technology was developed to create graded TBCs by coupling ion beam-assisted deposition (IBAD) with substrate pivoting in the alumina-YSZ system. The Electron Beam - 1200 kW (EB-1200) PVD system was used to deposit a variety of TBC coatings with micron layered microstructures and reduced thermal conductivity below 1.5 W/m.K. The use of IBAD produced fully stoichiometric coatings at a reduced substrate temperature of 600 oC and a reduced oxygen background pressure of 0.1 Pa. IBAD was also used to successfully demonstrate the transitioning of amorphous PVD-deposited alumina to the -phase alumina required as an oxygen diffusion barrier and for good adhesion to the substrate Ni2Al3 bondcoat. This process replaces the time consuming thermally grown oxide formation required before the YSZ deposition. In addition to the process technology, Direct Simulation Monte Carlo plume modeling and spectroscopic characterization of the PVD plumes were performed. The project consisted of five tasks. These included the production of layered periodic microstructures in the coating, the Direct Simulation Monte Carlo (DSMC) modeling of particle transport in the PVD plume, functional graded layer development, the deposition of all layers to form a complete coating, and materials characterization including thermal testing. Ion beam-assisted deposition, beam sharing through advanced digital rastering, substrate pivoting, hearth calorimetry, infrared imaging, fiber optic-enabled optical emission spectroscopy and careful thermal management were used to achieve all the milestones outlined in the FY02 LDRD proposal.

  18. PowerJet Wind Turbine Project

    SciTech Connect (OSTI)

    Bartlett, Raymond J

    2008-11-30T23:59:59.000Z

    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

  19. Wind Turbine Generator System Acoustic Noise Test Report for the Gaia Wind 11-kW Wind Turbine

    SciTech Connect (OSTI)

    Huskey, A.

    2011-11-01T23:59:59.000Z

    This report details the acoustic noise test conducted on the Gaia-Wind 11-kW wind turbine at the National Wind Technology Center. The test turbine is a two- bladed, downwind wind turbine with a rated power of 11 kW. The test turbine was tested in accordance with the International Electrotechnical Commission standard, IEC 61400-11 Ed 2.1 2006-11 Wind Turbine Generator Systems -- Part 11 Acoustic Noise Measurement Techniques.

  20. Turbines

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengthening a

  1. Offshore Wind Turbines Estimated Noise from Offshore Wind Turbine, Monhegan Island, Maine Addendum 2

    SciTech Connect (OSTI)

    Aker, Pamela M.; Jones, Anthony M.; Copping, Andrea E.

    2011-03-01T23:59:59.000Z

    Additional modeling for offshore wind turbines, for proposed floating wind platforms to be deployed by University of Maine/DeepCwind.

  2. Cooled turbine vane with endcaps

    DOE Patents [OSTI]

    Cunha, Frank J. (Avon, CT); Schiavo, Jr., Anthony L. (Ovideo, FL); Nordlund, Raymond Scott (Orlando, FL); Malow, Thomas (Oviedo, FL); McKinley, Barry L. (Chuluota, FL)

    2002-01-01T23:59:59.000Z

    A turbine vane assembly which includes an outer endcap having a plurality of generally straight passages and passage segments therethrough, an inner endcap having a plurality of passages and passage segments therethrough, and a vane assembly having an outer shroud, an airfoil body, and an inner shroud. The outer shroud, airfoil body and inner shroud each have a plurality of generally straight passages and passage segments therethrough as well. The outer endcap is coupled to the outer shroud so that outer endcap passages and said outer shroud passages form a fluid circuit. The inner endcap is coupled to the inner shroud so that the inner end cap passages and the inner shroud passages from a fluid circuit. Passages in the vane casting are in fluid communication with both the outer shroud passages and the inner shroud passages. Passages in the outer endcap may be coupled to a cooling system that supplies a coolant and takes away the heated exhaust.

  3. Second Stage Turbine Bucket Airfoil.

    DOE Patents [OSTI]

    Xu, Liming (Simpsonville, SC); Ahmadi, Majid (Simpsonville, SC); Humanchuk, David John (Simpsonville, SC); Moretto, Nicholas (Clifton Park, NY); Delehanty, Richard Edward (Maineville, OH)

    2003-05-06T23:59:59.000Z

    The second-stage buckets have airfoil profiles substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I wherein Z is a perpendicular distance from a plane normal to a radius of the turbine centerline and containing the X and Y values with the Z value commencing at zero in the X, Y plane at the radially innermost aerodynamic section of the airfoil and X and Y are coordinate values defining the airfoil profile at each distance Z. The X, Y and Z values may be scaled as a function of the same constant or number to provide a scaled-up or scaled-down airfoil section for the bucket.

  4. Airfoil for a gas turbine

    DOE Patents [OSTI]

    Liang, George (Palm City, FL)

    2011-01-18T23:59:59.000Z

    An airfoil is provided for a gas turbine comprising an outer structure comprising a first wall, an inner structure comprising a second wall spaced relative to the first wall such that a cooling gap is defined between at least portions of the first and second walls, and seal structure provided within the cooling gap between the first and second walls for separating the cooling gap into first and second cooling fluid impingement gaps. An inner surface of the second wall may define an inner cavity. The inner structure may further comprise a separating member for separating the inner cavity of the inner structure into a cooling fluid supply cavity and a cooling fluid collector cavity. The second wall may comprise at least one first impingement passage, at least one second impingement passage, and at least one bleed passage.

  5. Static seal for turbine engine

    DOE Patents [OSTI]

    Salazar, Santiago; Gisch, Andrew

    2014-04-01T23:59:59.000Z

    A seal structure for a gas turbine engine, the seal structure including first and second components located adjacent to each other and forming a barrier between high and low pressure zones. A seal cavity is defined in the first and second components, the seal cavity extending to either side of an elongated gap extending generally in a first direction between the first and second components. A seal member is positioned within the seal cavity and spans across the elongated gap. The seal member includes first and second side edges extending into each of the components in a second direction transverse to the first direction, and opposing longitudinal edges extending between the side edges generally parallel to the first direction. The side edges include a groove formed therein for effecting a reduction of gas flow around the seal member at the side edges.

  6. Turbine airfoil to shround attachment

    DOE Patents [OSTI]

    Campbell, Christian X; Morrison, Jay A; James, Allister W; Snider, Raymond G; Eshak, Daniel M; Marra, John J; Wessell, Brian J

    2014-05-06T23:59:59.000Z

    A turbine airfoil (31) with an end portion (42) that tapers (44) toward the end (43) of the airfoil. A ridge (46) extends around the end portion. It has proximal (66) and distal (67) sides. A shroud platform (50) is bi-cast onto the end portion around the ridge without bonding. Cooling shrinks the platform into compression (62) on the end portion (42) of the airfoil. Gaps between the airfoil and platform are formed using a fugitive material (56) in the bi-casting stage. These gaps are designed in combination with the taper angle (44) to accommodate differential thermal expansion while maintaining a gas seal along the contact surfaces. The taper angle (44) may vary from lesser on the pressure side (36) to greater on the suction side (38) of the airfoil. A collar portion (52) of the platform provides sufficient contact area for connection stability.

  7. NEXT GENERATION TURBINE SYSTEM STUDY

    SciTech Connect (OSTI)

    Frank Macri

    2002-02-28T23:59:59.000Z

    Rolls-Royce has completed a preliminary design and marketing study under a Department of Energy (DOE) cost shared contract (DE-AC26-00NT40852) to analyze the feasibility of developing a clean, high efficiency, and flexible Next Generation Turbine (NGT) system to meet the power generation market needs of the year 2007 and beyond. Rolls-Royce evaluated the full range of its most advanced commercial aerospace and aeroderivative engines alongside the special technologies necessary to achieve the aggressive efficiency, performance, emissions, economic, and flexibility targets desired by the DOE. Heavy emphasis was placed on evaluating the technical risks and the economic viability of various concept and technology options available. This was necessary to ensure the resulting advanced NGT system would provide extensive public benefits and significant customer benefits without introducing unacceptable levels of technical and operational risk that would impair the market acceptance of the resulting product. Two advanced cycle configurations were identified as offering significant advantages over current combined cycle products available in the market. In addition, balance of plant (BOP) technologies, as well as capabilities to improve the reliability, availability, and maintainability (RAM) of industrial gas turbine engines, have been identified. A customer focused survey and economic analysis of a proposed Rolls-Royce NGT product configuration was also accomplished as a part of this research study. The proposed Rolls-Royce NGT solution could offer customers clean, flexible power generation systems with very high efficiencies, similar to combined cycle plants, but at a much lower specific cost, similar to those of simple cycle plants.

  8. Advanced controls for floating wind turbines

    E-Print Network [OSTI]

    Casanovas, Carlos (Casanovas Bermejo)

    2014-01-01T23:59:59.000Z

    Floating Offshore Wind Turbines (FOWT) is a technology that stands to spearhead the rapid growth of the offshore wind energy sector and allow the exploration of vast high quality wind resources over coastal and offshore ...

  9. Wind Turbine Drivetrain Condition Monitoring - An Overview

    SciTech Connect (OSTI)

    Sheng, S; Veers, P.

    2011-10-01T23:59:59.000Z

    This paper provides an overview of wind turbine drivetrain condition monitoring based on presentations from a condition monitoring workshop organized by the National Renewable Energy Laboratory in 2009 and on additional references.

  10. How Does a Wind Turbine Work?

    Office of Energy Efficiency and Renewable Energy (EERE)

    Wind turbines operate on a simple principle. The energy in the wind turns two or three propeller-like blades around a rotor. The rotor is connected to the main shaft, which spins a generator to...

  11. Diffuser for augmenting a wind turbine

    DOE Patents [OSTI]

    Foreman, Kenneth M. (North Bellmore, NY); Gilbert, Barry L. (Westbury, NY)

    1984-01-01T23:59:59.000Z

    A diffuser for augmenting a wind turbine having means for energizing the boundary layer at several locations along the diffuser walls is improved by the addition of a short collar extending radially outward from the outlet of the diffuser.

  12. Active load control techniques for wind turbines.

    SciTech Connect (OSTI)

    van Dam, C.P. (University of California, Davis, CA); Berg, Dale E.; Johnson, Scott J. (University of California, Davis, CA)

    2008-07-01T23:59:59.000Z

    This report provides an overview on the current state of wind turbine control and introduces a number of active techniques that could be potentially used for control of wind turbine blades. The focus is on research regarding active flow control (AFC) as it applies to wind turbine performance and loads. The techniques and concepts described here are often described as 'smart structures' or 'smart rotor control'. This field is rapidly growing and there are numerous concepts currently being investigated around the world; some concepts already are focused on the wind energy industry and others are intended for use in other fields, but have the potential for wind turbine control. An AFC system can be broken into three categories: controls and sensors, actuators and devices, and the flow phenomena. This report focuses on the research involved with the actuators and devices and the generated flow phenomena caused by each device.

  13. Biphase Turbine Tests on Process Fluids 

    E-Print Network [OSTI]

    Helgeson, N. L.; Maddox, J. P.

    1983-01-01T23:59:59.000Z

    The Biphase turbine is a device for effectively producing shaft power from two-phase (liquid and gas) pressure let-downs and for separating the resulting phases. No other device is currently available for simultaneously performing these tasks...

  14. Electrical Cost Reduction Via Steam Turbine Cogeneration 

    E-Print Network [OSTI]

    Ewing, T. S.; Di Tullio, L. B.

    1991-01-01T23:59:59.000Z

    years. The availability of this equipment in a packaged system form makes it feasible to replace pressure reducing valves with turbine generator sets in applications with flows as low as 4000 pounds of steam per hour. These systems produce electricity...

  15. Compressor & Steam Turbine Efficiency Improvements & Revamping Opportunities

    E-Print Network [OSTI]

    Hata, S.; Horiba, J.; Sicker, M.

    2011-01-01T23:59:59.000Z

    of the plant and introduce the history of efficiency improvements for compressors and steam turbines in the Petrochemical Industry. Since heat balance configurations affect the plant's steam consumption, the authors will explain several cases of heat balance...

  16. Flexible dynamics of floating wind turbines

    E-Print Network [OSTI]

    Luypaert, Thomas (Thomas J.)

    2012-01-01T23:59:59.000Z

    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 ...

  17. Compressor & Steam Turbine Efficiency Improvements & Revamping Opportunities 

    E-Print Network [OSTI]

    Hata, S.; Horiba, J.; Sicker, M.

    2011-01-01T23:59:59.000Z

    of the plant and introduce the history of efficiency improvements for compressors and steam turbines in the Petrochemical Industry. Since heat balance configurations affect the plant's steam consumption, the authors will explain several cases of heat balance...

  18. Nine Universities Begin Critical Turbine Systems Research

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy announced the selection of ten projects at nine universities under the Office of Fossil Energy’s University Turbine Systems Research Program.

  19. Probabilistic analysis of turbine blade durability

    E-Print Network [OSTI]

    Kountras, Apostolos, 1970-

    2004-01-01T23:59:59.000Z

    The effect of variability on turbine blade durability was assessed for seven design/operating parameters in three blade designs. The parameters included gas path and cooling convective parameters, metal and coating thermal ...

  20. Diffuser Augmented Wind Turbine Analysis Code

    E-Print Network [OSTI]

    Carroll, Jonathan

    2014-05-31T23:59:59.000Z

    Wind Energy is becoming a significant source of energy throughout the world. This ever increasing field will potentially reach the limit of availability and practicality with the wind farm sites and size of the turbine itself. Therefore...

  1. Loss mechanisms in turbine tip clearance flows

    E-Print Network [OSTI]

    Huang, Arthur (Arthur C.)

    2011-01-01T23:59:59.000Z

    Numerical simulations of tip clearance ow have been carried out to dene the loss generation mechanisms associated with tip leakage in unshrouded axial turbines. Mix- ing loss between the leakage, which takes the form of a ...

  2. Building the Basic PVC Wind Turbine

    Broader source: Energy.gov (indexed) [DOE]

    Building the Basic PVC Wind Turbine Grades: 5-8, 9-12 Topic: Wind Energy Owner: Kidwind Project This educational material is brought to you by the U.S. Department of Energy's...

  3. Vertical axis wind turbine control strategy

    SciTech Connect (OSTI)

    McNerney, G.M.

    1981-08-01T23:59:59.000Z

    Early expensive in automatic operation of the Sandia 17-m vertical axis research wind turbine (VAWT) has demonstrated the need for a systematic study of control algorithms. To this end, a computer model has been developed that uses actual wind time series and turbine performance data to calculate the power produced by the Sandia 17-m VAWT operating in automatic control. The model has been used to investigate the influence of starting algorithms on annual energy production. The results indicate that, depending on turbine and local wind characteristics, a bad choice of a control algorithm can significantly reduce overall energy production. The model can be used to select control algorithms and threshold parameters that maximize long-term energy production. An attempt has been made to generalize these results from local site and turbine characteristics to obtain general guidelines for control algorithm design.

  4. Consider Steam Turbine Drives for Rotating Equipment

    SciTech Connect (OSTI)

    Not Available

    2006-01-01T23:59:59.000Z

    This revised ITP tip sheet on steam turbine drives for rotating equipment provides how-to advice for improving the system using low-cost, proven practices and technologies.

  5. Passively cooled direct drive wind turbine

    DOE Patents [OSTI]

    Costin, Daniel P. (Chelsea, VT)

    2008-03-18T23:59:59.000Z

    A wind turbine is provided that passively cools an electrical generator. The wind turbine includes a plurality of fins arranged peripherally around a generator house. Each of the fins being oriented at an angle greater than zero degrees to allow parallel flow of air over the fin. The fin is further tapered to allow a constant portion of the fin to extend beyond the air stream boundary layer. Turbulence initiators on the nose cone further enhance heat transfer at the fins.

  6. A Wood-Fired Gas Turbine Plant

    E-Print Network [OSTI]

    Powell, S. H.; Hamrick, J. T.

    A WOOD-FIRED GAS TURBINE PLANT Sam H. Powell, Tennessee Valley Authority, Chattanooga, Tennessee Joseph T. Hamrick, Aerospace Research Corporation, RBS Electric, Roanoke, VA Abstract This paper covers the research and development of a wood...-fired gas turbine unit that is used for generating electricity. The system uses one large cyclonic combustor and a cyclone cleaning system in series to provide hot gases to drive an Allison T-56 aircraft engine (the industrial version is the 50l-k). A...

  7. Airfoil seal system for gas turbine engine

    DOE Patents [OSTI]

    Diakunchak, Ihor S.

    2013-06-25T23:59:59.000Z

    A turbine airfoil seal system of a turbine engine having a seal base with a plurality of seal strips extending therefrom for sealing gaps between rotational airfoils and adjacent stationary components. The seal strips may overlap each other and may be generally aligned with each other. The seal strips may flex during operation to further reduce the gap between the rotational airfoils and adjacent stationary components.

  8. Design Tools to Assess Hydro-Turbine Biological Performance: Priest Rapids Dam Turbine Replacement Project

    SciTech Connect (OSTI)

    Richmond, Marshall C.; Rakowski, Cynthia L.; Serkowski, John A.; Strickler, Brad; Weisbeck, Molly; Dotson, Curtis L.

    2013-06-25T23:59:59.000Z

    Over the past two decades, there have been many studies describing injury mechanisms associated with turbine passage, the response of various fish species to these mechanisms, and the probability of survival through dams. Although developing tools to design turbines that improve passage survival has been difficult and slow, a more robust quantification of the turbine environment has emerged through integrating physical model data, fish survival data, and computational fluid dynamics (CFD) studies. Grant County Public Utility District (GCPUD) operates the Priest Rapids Dam (PRD), a hydroelectric facility on the Columbia River in Washington State. The dam contains 10 Kaplan-type turbine units that are now almost 50 years old. The Utility District plans to refit all of these aging turbines with new turbines. The Columbia River at PRD is a migratory pathway for several species of juvenile and adult salmonids, so passage of fish through the dam is a major consideration when replacing the turbines. In this presentation, a method for turbine biological performance assessment (BioPA) is introduced. Using this method, a suite of biological performance indicators is computed based on simulated data from a CFD model of a proposed turbine design. Each performance indicator is a measure of the probability of exposure to a certain dose of an injury mechanism. Using known relationships between the dose of an injury mechanism and frequency of injury (dose–response) from laboratory or field studies, the likelihood of fish injury for a turbine design can be computed from the performance indicator. By comparing the values of the indicators from proposed designs, the engineer can identify the more-promising alternatives. We will present application of the BioPA method for baseline risk assessment calculations for the existing Kaplan turbines at PRD that will be used as the minimum biological performance that a proposed new design must achieve.

  9. Fish Passage Assessment of an Advanced Hydropower Turbine and Conventional Turbine Using Blade-strike Modeling

    SciTech Connect (OSTI)

    Deng, Zhiqun; Carlson, Thomas J.; Dauble, Dennis D.; Ploskey, Gene R.

    2011-01-04T23:59:59.000Z

    In the Columbia and Snake River basins, several species of Pacific salmon were listed under the Endangered Species Act of 1973 due to significant declines of fish population. Dam operators and design engineers are thus faced with the task of making those hydroelectric facilities more ecologically friendly through changes in hydro-turbine design and operation. Public Utility District No. 2 of Grant County, Washington, applied for re-licensing from the U.S. Federal Energy Regulatory Commission to replace the 10 turbines at Wanapum Dam with advanced hydropower turbines that were designed to increase power generation and improve fish passage conditions. We applied both deterministic and stochastic blade-strike models to the newly installed turbine and an existing turbine. Modeled probabilities were compared to the results of a large-scale live fish survival study and a sensor fish study under the same operational parameters. Overall, injury rates predicted by the deterministic model were higher than experimental rates of injury while those predicted by the stochastic model were in close agreement with experiment results. Fish orientation at the time of entry into the plane of the leading edges of the turbine runner blades was an important factor contributing to uncertainty in modeled results. The advanced design turbine had slightly higher modeled injury rates than the existing turbine design; however, there was no statistical evidence that suggested significant differences in blade-strike injuries between the two turbines and the hypothesis that direct fish survival rate through the advanced hydropower turbine is equal or better than that through the conventional turbine could not be rejected.

  10. FUEL CELL/MICRO-TURBINE COMBINED CYCLE

    SciTech Connect (OSTI)

    Larry J. Chaney; Mike R. Tharp; Tom W. Wolf; Tim A. Fuller; Joe J. Hartvigson

    1999-12-01T23:59:59.000Z

    A wide variety of conceptual design studies have been conducted that describe ultra-high efficiency fossil power plant cycles. The most promising of these ultra-high efficiency cycles incorporate high temperature fuel cells with a gas turbine. Combining fuel cells with a gas turbine increases overall cycle efficiency while reducing per kilowatt emissions. This study has demonstrated that the unique approach taken to combining a fuel cell and gas turbine has both technical and economic merit. The approach used in this study eliminates most of the gas turbine integration problems associated with hybrid fuel cell turbine systems. By using a micro-turbine, and a non-pressurized fuel cell the total system size (kW) and complexity has been reduced substantially from those presented in other studies, while maintaining over 70% efficiency. The reduced system size can be particularly attractive in the deregulated electrical generation/distribution environment where the market may not demand multi-megawatt central stations systems. The small size also opens up the niche markets to this high efficiency, low emission electrical generation option.

  11. Annual Report: Turbines (30 September 2012)

    SciTech Connect (OSTI)

    Alvin, Mary Anne [NETL] [NETL; Richards, George [NETL] [NETL

    2012-09-30T23:59:59.000Z

    The FY12 NETL-RUA Turbine Thermal Management effort supported the Department of Energy (DOE) Hydrogen Turbine Program through conduct of novel, fundamental, basic, and applied research in the areas of aerothermal heat transfer, coatings development, and secondary flow control. This research project utilized the extensive expertise and facilities readily available at NETL and the participating universities. The research approach includes explorative studies based on scaled models and prototype coupon tests conducted under realistic high-temperature, pressurized, turbine operating conditions. This research is expected to render measurable outcomes that will meet DOE advanced turbine development goals of a 3- to 5-point increase in power island efficiency and a 30 percent power increase above the hydrogen-fired combined cycle baseline. In addition, knowledge gained from this project will further advance the aerothermal cooling and TBC technologies in the general turbine community. This project has been structured to address ? Development and design of aerothermal and materials concepts in FY12-13. ? Design and manufacturing of these advanced concepts in FY13. ? Bench-scale/proof-of-concept testing of these concepts in FY13-14 and beyond. The Turbine Thermal Management project consists of four tasks that focus on a critical technology development in the areas of aerothermal and heat transfer, coatings and materials development, design integration and testing, and a secondary flow rotating rig.

  12. Marine Animal Alert System -- Task 2.1.5.3: Development of Monitoring Technologies -- FY 2011 Progress Report

    SciTech Connect (OSTI)

    Carlson, Thomas J.; Deng, Zhiqun; Myers, Joshua R.; Matzner, Shari; Copping, Andrea E.

    2011-09-30T23:59:59.000Z

    The Marine Animal Alert System (MAAS) in development by the Pacific Northwest National Laboratory is focused on providing elements of compliance monitoring to support deployment of marine hydrokinetic energy devices. An initial focus is prototype tidal turbines to be deployed in Puget Sound in Washington State. The MAAS will help manage the risk of injury or mortality to marine animals from blade strike or contact with tidal turbines. In particular, development has focused on detection, classification, and localization of listed Southern Resident killer whales within 200 m of prototype turbines using both active and passive acoustic approaches. At the close of FY 2011, a passive acoustic system consisting of a pair of four-element star arrays and parallel processing of eight channels of acoustic receptions has been designed and built. Field tests of the prototype system are scheduled for the fourth quarter of calendar year 2011. Field deployment and testing of the passive acoustic prototype is scheduled for the first quarter of FY 2012. The design of an active acoustic system that could be built using commercially available off-the-shelf components from active acoustic system vendors is also in the final stages of design and specification.

  13. Analysis of NOx Formation in a Hydrogen-Fueled Gas Turbine Engine

    E-Print Network [OSTI]

    Samuelsen, GS; Therkelsen, P; Werts, T; McDonell, V

    2009-01-01T23:59:59.000Z

    Turbine Fuel” J. Engr. Gas Turbines and Power, Vol. 127, pp,Test in a Small Gas Turbine,” International Journal ofof Hydrogen in a Small Gas Turbine Combustor,” International

  14. Final Turbine and Test Facility Design Report Alden/NREC Fish...

    Broader source: Energy.gov (indexed) [DOE]

    Final Turbine and Test Facility Design Report AldenNREC Fish Friendly Turbine Final Turbine and Test Facility Design Report AldenNREC Fish Friendly Turbine The final report...

  15. Marin County- Solar Access Code

    Broader source: Energy.gov [DOE]

    Marin County's Energy Conservation Code is designed to assure new subdivisions provide for future passive or natural heating or cooling opportunities in the subdivision to the extent feasible. ...

  16. Energy 101: Marine & Hydrokinetic Energy

    Office of Energy Efficiency and Renewable Energy (EERE)

    See how marine and hydrokinetic technologies harness the energy of the ocean's waves, tides, and currents and convert it into electricity to power our homes, buildings, and cities.

  17. Closed loop air cooling system for combustion turbines

    DOE Patents [OSTI]

    Huber, D.J.; Briesch, M.S.

    1998-07-21T23:59:59.000Z

    Convective cooling of turbine hot parts using a closed loop system is disclosed. Preferably, the present invention is applied to cooling the hot parts of combustion turbine power plants, and the cooling provided permits an increase in the inlet temperature and the concomitant benefits of increased efficiency and output. In preferred embodiments, methods and apparatus are disclosed wherein air is removed from the combustion turbine compressor and delivered to passages internal to one or more of a combustor and turbine hot parts. The air cools the combustor and turbine hot parts via convection and heat is transferred through the surfaces of the combustor and turbine hot parts. 1 fig.

  18. Closed loop air cooling system for combustion turbines

    DOE Patents [OSTI]

    Huber, David John (North Canton, OH); Briesch, Michael Scot (Orlando, FL)

    1998-01-01T23:59:59.000Z

    Convective cooling of turbine hot parts using a closed loop system is disclosed. Preferably, the present invention is applied to cooling the hot parts of combustion turbine power plants, and the cooling provided permits an increase in the inlet temperature and the concomitant benefits of increased efficiency and output. In preferred embodiments, methods and apparatus are disclosed wherein air is removed from the combustion turbine compressor and delivered to passages internal to one or more of a combustor and turbine hot parts. The air cools the combustor and turbine hot parts via convection and heat is transferred through the surfaces of the combustor and turbine hot parts.

  19. Effects of Second-Order Hydrodynamics on a Semisubmersible Floating Offshore Wind Turbine: Preprint

    SciTech Connect (OSTI)

    Bayati, I.; Jonkman, J.; Robertson, A.; Platt, A.

    2014-07-01T23:59:59.000Z

    The objective of this paper is to assess the second-order hydrodynamic effects on a semisubmersible floating offshore wind turbine. Second-order hydrodynamics induce loads and motions at the sum- and difference-frequencies of the incident waves. These effects have often been ignored in offshore wind analysis, under the assumption that they are significantly smaller than first-order effects. The sum- and difference-frequency loads can, however, excite eigenfrequencies of the system, leading to large oscillations that strain the mooring system or vibrations that cause fatigue damage to the structure. Observations of supposed second-order responses in wave-tank tests performed by the DeepCwind consortium at the MARIN offshore basin suggest that these effects might be more important than originally expected. These observations inspired interest in investigating how second-order excitation affects floating offshore wind turbines and whether second-order hydrodynamics should be included in offshore wind simulation tools like FAST in the future. In this work, the effects of second-order hydrodynamics on a floating semisubmersible offshore wind turbine are investigated. Because FAST is currently unable to account for second-order effects, a method to assess these effects was applied in which linearized properties of the floating wind system derived from FAST (including the 6x6 mass and stiffness matrices) are used by WAMIT to solve the first- and second-order hydrodynamics problems in the frequency domain. The method has been applied to the OC4-DeepCwind semisubmersible platform, supporting the NREL 5-MW baseline wind turbine. The loads and response of the system due to the second-order hydrodynamics are analysed and compared to first-order hydrodynamic loads and induced motions in the frequency domain. Further, the second-order loads and induced response data are compared to the loads and motions induced by aerodynamic loading as solved by FAST.

  20. Comparison of Second-Order Loads on a Semisubmersible Floating Wind Turbine: Preprint

    SciTech Connect (OSTI)

    Gueydon, S.; Duarte, T.; Jonkman, J.; Bayati, I.; Sarmento, A.

    2014-03-01T23:59:59.000Z

    As offshore wind projects move to deeper waters, floating platforms become the most feasible solution for supporting the turbines. The oil and gas industry has gained experience with floating platforms that can be applied to offshore wind projects. This paper focuses on the analysis of second-order wave loading on semisubmersible platforms. Semisubmersibles, which are being chosen for different floating offshore wind concepts, are particularly prone to slow-drift motions. The slack catenary moorings usually result in large natural periods for surge and sway motions (more than 100 s), which are in the range of the second-order difference-frequency excitation force. Modeling these complex structures requires coupled design codes. Codes have been developed that include turbine aerodynamics, hydrodynamic forces on the platform, restoring forces from the mooring lines, flexibility of the turbine, and the influence of the turbine control system. In this paper two different codes are employed: FAST, which was developed by the National Renewable Energy Laboratory, and aNySIM, which was developed by the Maritime Research Institute Netherlands. The hydrodynamic loads are based on potential-flow theory, up to the second order. Hydrodynamic coefficients for wave excitation, radiation, and hydrostatic forces are obtained with two different panel codes, WAMIT (developed by the Massachusetts Institute of Technology) and DIFFRAC (developed by MARIN). The semisubmersible platform, developed for the International Energy Agency Wind Task 30 Offshore Code Comparison Collaboration Continuation project is used as a reference platform. Irregular waves are used to compare the behavior of this platform under slow-drift excitation loads. The results from this paper highlight the effects of these loads on semisubmersible-type platforms, which represent a promising solution for the commercial development of the offshore deepwater wind resource.

  1. Wind Turbine Generator System Duration Test Report for the Mariah Power Windspire Wind Turbine

    SciTech Connect (OSTI)

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

    2010-05-01T23:59:59.000Z

    This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project 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 Wind Technology Center (NWTC) as a part of the first round of this project. Duration testing is one of up to five tests that may be performed on the turbines. Other tests include power performance, safety and function, 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. This duration test report focuses on the Mariah Power Windspire wind turbine.

  2. 2009 WIND TURBINE IMPACT STUDY APPRAISAL GROUP ONE 9/9/2009 WIND TURBINE IMPACT STUDY

    E-Print Network [OSTI]

    Fond Du; Lac Counties Wisconsin

    2009-01-01T23:59:59.000Z

    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

  3. Marine and Hydrokinetic Technology (MHK) Instrumentation, Measurement...

    Broader source: Energy.gov (indexed) [DOE]

    workshop brought together over 60 experts in marine energy technologies to disseminate technical information to the marine energy community, and to collect information to help...

  4. ADVANCED TURBINE SYSTEM FEDERAL ASSISTANCE PROGRAM

    SciTech Connect (OSTI)

    Frank Macri

    2003-10-01T23:59:59.000Z

    Rolls-Royce Corporation has completed a cooperative agreement under Department of Energy (DOE) contract DE-FC21-96MC33066 in support of the Advanced Turbine Systems (ATS) program to stimulate industrial power generation markets. This DOE contract was performed during the period of October 1995 to December 2002. This final technical report, which is a program deliverable, describes all associated results obtained during Phases 3A and 3B of the contract. Rolls-Royce Corporation (formerly Allison Engine Company) initially focused on the design and development of a 10-megawatt (MW) high-efficiency industrial gas turbine engine/package concept (termed the 701-K) to meet the specific goals of the ATS program, which included single digit NOx emissions, increased plant efficiency, fuel flexibility, and reduced cost of power (i.e., $/kW). While a detailed design effort and associated component development were successfully accomplished for the 701-K engine, capable of achieving the stated ATS program goals, in 1999 Rolls-Royce changed its focus to developing advanced component technologies for product insertion that would modernize the current fleet of 501-K and 601-K industrial gas turbines. This effort would also help to establish commercial venues for suppliers and designers and assist in involving future advanced technologies in the field of gas turbine engine development. This strategy change was partly driven by the market requirements that suggested a low demand for a 10-MW aeroderivative industrial gas turbine, a change in corporate strategy for aeroderivative gas turbine engine development initiatives, and a consensus that a better return on investment (ROI) could be achieved under the ATS contract by focusing on product improvements and technology insertion for the existing Rolls-Royce small engine industrial gas turbine fleet.

  5. Hydraulic multistage turbine of turbodrill

    SciTech Connect (OSTI)

    Brudny-Chelyadinov, S.J.; Budyansky, V.S.; Filimonov, V.A.

    1987-06-30T23:59:59.000Z

    This patent describes a turbodrill provided with a rock destruction tool for drilling wells, a hydraulic turbine for driving the rock destruction tool under the action of a drilling fluid, comprising: identical stages formed by one stator and one rotor; the stator of one stage; a spacing sleeve of the stator; a ring of the stator incorporating: a hub; a blading formed by a multitude of blades equally spaced on the inside of the hub of the stator ring; a rim secured to the blades at the tips away from the hub, and a flow channel for passing the drilling fluid arranged between the hub and the rim, and accommodating the blading; blades of the blading which, at least in a number of the stator rings from the plurality of stages, are made with an angle of curvature of the chamber line being greater than an acute angle formed by the tangent to this line at the exit of the blading and the axis of drilling fluid flow; the rotor of one state arranged coaxially with the stator; a spacing sleeve of the rotor; and a ring of the rotor.

  6. SNL Researchers Assess Wind Turbine Blade Inspection and Repair...

    Office of Environmental Management (EM)

    Researchers Assess Wind Turbine Blade Inspection and Repair Methods SNL Researchers Assess Wind Turbine Blade Inspection and Repair Methods May 18, 2015 - 5:32pm Addthis A picture...

  7. Structural Monitoring of Wind Turbines using Wireless Sensor Networks

    E-Print Network [OSTI]

    Sweetman, Bert

    on traditional fossil fuel technologies. Conditional monitoring of wind turbines can help to avert unplanned). Technological improvements (e.g. larger, more powerful generation turbines) and federal tax subsidies have

  8. Sandia National Laboratories: vertical-axis wind turbine research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    vertical-axis wind turbine research Sandia Vertical-Axis Wind-Turbine Research Presented at Science of Making Torque from Wind Conference On July 8, 2014, in Computational Modeling...

  9. Reduced Order Structural Modeling of Wind Turbine Blades

    E-Print Network [OSTI]

    Jonnalagadda, Yellavenkatasunil

    2011-10-21T23:59:59.000Z

    Conventional three dimensional structural analysis methods prove to be expensive for the preliminary design of wind turbine blades. However, wind turbine blades are large slender members with complex cross sections. They can be accurately modeled...

  10. Energy Saving in Ammonia Plant by Using Gas Turbine 

    E-Print Network [OSTI]

    Uji, S.; Ikeda, M.

    1981-01-01T23:59:59.000Z

    An ammonia plant, in which the IHI-SULZER Type 57 Gas Turbine is integrated in order to achieve energy saving, has started successful operation. Tile exhaust gas of the gas turbine has thermal energy of relatively high temperature, therefore...

  11. Gas Turbine Technology, Part A: Overview, Cycles, and Thermodynamic Performance 

    E-Print Network [OSTI]

    Meher-Homji, C. B.; Focke, A. B.

    1985-01-01T23:59:59.000Z

    The growth of cogeneration technology has accelerated in recent years, and it is estimated that fifty percent of the cogeneration market will involve gas turbines. To several energy engineers, gas turbine engines present a new and somewhat...

  12. Combustion Gas Turbine Power Enhancement by Refrigeration of Inlet Air 

    E-Print Network [OSTI]

    Meher-Homji, C. B.; Mani, G.

    1983-01-01T23:59:59.000Z

    Combustion gas turbines have gained widespread acceptance for mechanical drive and power generation applications. One key drawback of a combustion turbine is that its specific output and thermal efficiency vary quite significantly with variations...

  13. Gas Turbine Technology, Part B: Components, Operations and Maintenance

    E-Print Network [OSTI]

    Meher-Homji, C. B.; Focke, A. B.

    , single and split shaft. The pros and cons of different types are reviewed. Gas turbine component types - axial and centrifugal compressors and different turbine types, along with combustor types will be discussed. Important considerations during machine...

  14. Forecasting and strategic inventory placement for gas turbine aftermarket spares

    E-Print Network [OSTI]

    Simmons, Joshua T. (Joshua Thomas)

    2007-01-01T23:59:59.000Z

    This thesis addresses the problem of forecasting demand for Life Limited Parts (LLPs) in the gas turbine engine aftermarket industry. It is based on work performed at Pratt & Whitney, a major producer of turbine engines. ...

  15. Energy Saving in Ammonia Plant by Using Gas Turbine

    E-Print Network [OSTI]

    Uji, S.; Ikeda, M.

    1981-01-01T23:59:59.000Z

    An ammonia plant, in which the IHI-SULZER Type 57 Gas Turbine is integrated in order to achieve energy saving, has started successful operation. Tile exhaust gas of the gas turbine has thermal energy of relatively high temperature, therefore...

  16. Multi-hazard Reliability Assessment of Offshore Wind Turbines

    E-Print Network [OSTI]

    Mardfekri Rastehkenari, Maryam 1981-

    2012-12-04T23:59:59.000Z

    A probabilistic framework is developed to assess the structural reliability of offshore wind turbines. Probabilistic models are developed to predict the deformation, shear force and bending moment demands on the support structure of wind turbines...

  17. Data Analytics Methods in Wind Turbine Design and Operations

    E-Print Network [OSTI]

    Lee, Giwhyun

    2013-05-22T23:59:59.000Z

    This dissertation develops sophisticated data analytic methods to analyze structural loads on, and power generation of, wind turbines. Wind turbines, which convert the kinetic energy in wind into electrical power, are operated within stochastic...

  18. Secondary air interaction with main flow in axial turbines

    E-Print Network [OSTI]

    Zlatinov, Metodi B. (Metodi Blagoev)

    2011-01-01T23:59:59.000Z

    Secondary air, known as purge air, is injected through seals in the hub and shroud of axial turbines to prevent hot gas ingestion into the endwall cavities. An investigation into the interaction of purge ow with turbine ...

  19. Characterization of turbine rim seal flow and its sealing effectiveness

    E-Print Network [OSTI]

    Catalfamo, Peter T

    2013-01-01T23:59:59.000Z

    In a gas turbine engine, ingestion of hot gas from the flowpath into the gaps between the turbine rotor and stator can lead to elevated metal temperatures and a deterioration of component life. To prevent ingestion, bleed ...

  20. Interagency Field Test Evaluates Co-operation of Turbines and...

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

    Interagency Field Test Evaluates Co-operation of Turbines and Radar Interagency Field Test Evaluates Co-operation of Turbines and Radar May 1, 2012 - 2:56pm Addthis The Department...

  1. An experimental and numerical study of wind turbine seismic behavior

    E-Print Network [OSTI]

    Prowell, I.

    2011-01-01T23:59:59.000Z

    3.2.1 Description of Test Wind Turbine . . . . . .Figure 1.2: Components of a modern wind turbine . . . . . .Experimental and Numerical Seismic Response of a 65-kW Wind

  2. A doubly-fed permanent magnet generator for wind turbines

    E-Print Network [OSTI]

    Thomas, Andrew J. (Andrew Joseph), 1981-

    2004-01-01T23:59:59.000Z

    Optimum extraction of energy from a wind turbine requires that turbine speed vary with wind speed. Existing solutions to produce constant-frequency electrical output under windspeed variations are undesirable due to ...

  3. advanced turbine engines: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Alan) 2003-01-01 39 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  4. automobile gas turbine: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Alan) 2003-01-01 58 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  5. aviation turbine fuels: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Page Topic Index 141 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  6. advanced turbine design: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and control of wind turbines. Lucy Y. Pao; Kathryn E. Johnson 270 A Silicon-Based Micro Gas Turbine Engine for Power Generation CERN Preprints Summary: This paper reports on our...

  7. advanced turbine systems: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Goebel; Lo Obrecht 43 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  8. advanced gas turbines: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Alan) 2003-01-01 63 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  9. aviation gas turbines: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Alan) 2003-01-01 55 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  10. advanced gas turbine: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Alan) 2003-01-01 63 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  11. aircraft turbine engines: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Alan) 2003-01-01 48 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  12. aircraft gas turbines: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Alan) 2003-01-01 62 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  13. aircraft gas turbine: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Alan) 2003-01-01 62 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  14. aircraft turbine engine: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Alan) 2003-01-01 48 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  15. advanced research turbine: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    a modern wind turbine becomes Paris-Sud XI, Universit de 279 A Silicon-Based Micro Gas Turbine Engine for Power Generation CERN Preprints Summary: This paper reports on our...

  16. aviation gas turbine: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Alan) 2003-01-01 55 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  17. advanced combustion turbines: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mohammad 2014-01-01 7 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  18. axial flow turbines: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Carver, Jeffrey C. 176 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  19. axial flow turbine: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Carver, Jeffrey C. 176 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  20. automotive gas turbine: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Alan) 2003-01-01 56 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  1. aviation turbine fuel: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Page Topic Index 141 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  2. advanced turbine system: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Goebel; Lo Obrecht 43 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  3. aero gas turbine: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Alan) 2003-01-01 56 Development of a catalytic combustion system for the MIT Micro Gas Turbine Engine MIT - DSpace Summary: As part of the MIT micro-gas turbine engine...

  4. Obstacles and Opportunity: Turbine Motorization in Refineries Today

    E-Print Network [OSTI]

    Feng, Hua; Liu, Jinghing; Liu, Xiang; Ahmad, Mushtaq; Deng, Alan

    2012-01-01T23:59:59.000Z

    Steam turbines have been widely used in oil refineries for driving pumps, compressors and other rotary machines. However, in recent years, the authors of this paper have seen substantial turbine motorization projects completed or being planned...

  5. Obstacles and Opportunity: Turbine Motorization in Refineries Today 

    E-Print Network [OSTI]

    Feng, Hua; Liu, Jinghing; Liu, Xiang; Ahmad, Mushtaq; Deng, Alan

    2012-01-01T23:59:59.000Z

    Steam turbines have been widely used in oil refineries for driving pumps, compressors and other rotary machines. However, in recent years, the authors of this paper have seen substantial turbine motorization projects completed or being planned...

  6. Gas Turbine Technology, Part B: Components, Operations and Maintenance 

    E-Print Network [OSTI]

    Meher-Homji, C. B.; Focke, A. B.

    1985-01-01T23:59:59.000Z

    This paper builds on Part A and discusses the hardware involved in gas turbines as well as operations and maintenance aspects pertinent to cogeneration plants. Different categories of gas turbines are reviewed such as heavy duty aeroderivative...

  7. Data Analytics Methods in Wind Turbine Design and Operations 

    E-Print Network [OSTI]

    Lee, Giwhyun

    2013-05-22T23:59:59.000Z

    This dissertation develops sophisticated data analytic methods to analyze structural loads on, and power generation of, wind turbines. Wind turbines, which convert the kinetic energy in wind into electrical power, are operated within stochastic...

  8. Seven Universities Selected To Conduct Advanced Turbine Technology Studies

    Broader source: Energy.gov [DOE]

    Seven universities have been selected by the U.S. Department of Energy to conduct advanced turbine technology studies under the Office of Fossil Energy's University Turbine Systems Research Program.

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

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

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

  10. Water Works! Water Resources Engineering and Turbine Energy

    E-Print Network [OSTI]

    Barrash, Warren

    Water Works! Water Resources Engineering and Turbine Energy Facilitators: Dr. Jairo Hernandez. This energy can be used to generate electricity (dams and turbines), produce mechanical work (wells), as well

  11. WINDExchange Webinar: Small and Distributed Wind Turbine Update...

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

    Webinar: Small and Distributed Wind Turbine Update WINDExchange Webinar: Small and Distributed Wind Turbine Update December 17, 2014 3:00PM to 5:00PM EST Add to calendar Save the...

  12. Field Examples of Axial Cracked Bearings in Wind Turbine Gearboxes...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Field Examples of Axial Cracked Bearings in Wind Turbine Gearboxes Presented by Paul John Baker of FrontierPro Services at the Wind Turbine Tribology Seminar 2014. 141030 Axial...

  13. Gas Turbine Technology, Part A: Overview, Cycles, and Thermodynamic Performance

    E-Print Network [OSTI]

    Meher-Homji, C. B.; Focke, A. B.

    The growth of cogeneration technology has accelerated in recent years, and it is estimated that fifty percent of the cogeneration market will involve gas turbines. To several energy engineers, gas turbine engines present a new and somewhat...

  14. Combustion Gas Turbine Power Enhancement by Refrigeration of Inlet Air

    E-Print Network [OSTI]

    Meher-Homji, C. B.; Mani, G.

    1983-01-01T23:59:59.000Z

    Combustion gas turbines have gained widespread acceptance for mechanical drive and power generation applications. One key drawback of a combustion turbine is that its specific output and thermal efficiency vary quite significantly with variations...

  15. Multi-hazard Reliability Assessment of Offshore Wind Turbines 

    E-Print Network [OSTI]

    Mardfekri Rastehkenari, Maryam 1981-

    2012-12-04T23:59:59.000Z

    A probabilistic framework is developed to assess the structural reliability of offshore wind turbines. Probabilistic models are developed to predict the deformation, shear force and bending moment demands on the support structure of wind turbines...

  16. Advanced turbine systems: Studies and conceptual design

    SciTech Connect (OSTI)

    van der Linden, S.; Gnaedig, G.; Kreitmeier, F.

    1993-11-01T23:59:59.000Z

    The ABB selection for the Advanced Turbine System (ATS) includes advanced developments especially in the hot gas path of the combustion turbine and new state-of-the-art units such as the steam turbine and the HRSG. The increase in efficiency by more than 10% multiplicative compared to current designs will be based on: (1) Turbine Inlet Temperature Increase; (2) New Cooling Techniques for Stationary and Rotating Parts; and New Materials. Present, projected component improvements that will be introduced with the above mentioned issues will yield improved CCSC turbine performance, which will drive the ATS selected gas-fired reference CC power plant to 6 % LHV or better. The decrease in emission levels requires a careful optimization of the cycle design, where cooling air consumption has to be minimized. All interfaces of the individual systems in the complete CC Plant need careful checks, especially to avoid unnecessary margins in the individual designs. This study is an important step pointing out the feasibility of the ATS program with realistic goals set by DOE, which, however, will present challenges for Phase II time schedule of 18 months. With the approach outlined in this study and close cooperation with DOE, ATS program success can be achieved to deliver low emissions and low cost of electricity by the year 2002. The ABB conceptual design and step approach will lead to early component demonstration which will help accelerate the overall program objectives.

  17. Low thermal stress ceramic turbine nozzle

    DOE Patents [OSTI]

    Glezer, B.; Bagheri, H.; Fierstein, A.R.

    1996-02-27T23:59:59.000Z

    A turbine nozzle vane assembly having a preestablished rate of thermal expansion is positioned in a gas turbine engine and is attached to conventional metallic components, the metallic components having a preestablished rate of thermal expansion greater than the preestablished rate of thermal expansion of the turbine nozzle vane assembly. The turbine nozzle vane assembly includes an outer shroud and an inner shroud having a plurality of vanes there between. Each of the plurality of vanes have a device for heating and cooling a portion of each of the plurality of vanes. Furthermore, the inner shroud has a plurality of bosses attached thereto. A cylindrical member has a plurality of grooves formed therein and each of the plurality of bosses are positioned in corresponding ones of the plurality of grooves. The turbine nozzle vane assembly provides an economical, reliable and effective ceramic component having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the other component. 4 figs.

  18. Methods and apparatus for rotor load control in wind turbines

    DOE Patents [OSTI]

    Moroz, Emilian Mieczyslaw

    2006-08-22T23:59:59.000Z

    A wind turbine having a rotor, at least one rotor blade, and a plurality of generators, of which a first generator is configured to provide power to an electric grid and a second generator is configured to provide power to the wind turbine during times of grid loss. The wind turbine is configured to utilize power provided by the second generator to reduce loads on the wind turbine during times of grid loss.

  19. A Portable Expert System for Gas Turbine Maintenance

    E-Print Network [OSTI]

    Quentin, G. H.

    A PORTABLE EXPERT SYSTEM FOR GAS TURBINE MAINTENANCE Or. George H. Quentin Electric Power Research Institute (EPRI) Palo Alto, California ABSTRACT TURBINE CONTROLS GROUND FAULT ADVISOR Combustion turbines for electric power generation..., EPRI has developed The SA.VANT- System. This unique multi-faceted portable unit will apply a broad range of expert systems in the workplace for power plant maintenance, including turbomachinery of all types, but especially for gas turbines. I...

  20. Reliable Gas Turbine Output: Attaining Temperature Independent Performance

    E-Print Network [OSTI]

    Neeley, J. E.; Patton, S.; Holder, F.

    % of the electric system, could create reliability and operational problems. This paper explores the potential for maintaining constant, reliable outputs from gas turbines by cooling ambient air temperatures before the air is used in the compressor section... strides have been made in the development of both aircraft, aircraft-derivative, and industrial gas turbines. The Basic Cycle The basic gas turbine engine consists of a compressor, a combustor, and a turbine in series. The intake air is compressed...

  1. Modal Dynamics of Large Wind Turbines with Different Support Structures

    SciTech Connect (OSTI)

    Bir, G.; Jonkman, J.

    2008-07-01T23:59:59.000Z

    This paper presents modal dynamics of floating-platform-supported and monopile-supported offshore wind turbines.

  2. Closed-loop air cooling system for a turbine engine

    DOE Patents [OSTI]

    North, William Edward (Winter Springs, FL)

    2000-01-01T23:59:59.000Z

    Method and apparatus are disclosed for providing a closed-loop air cooling system for a turbine engine. The method and apparatus provide for bleeding pressurized air from a gas turbine engine compressor for use in cooling the turbine components. The compressed air is cascaded through the various stages of the turbine. At each stage a portion of the compressed air is returned to the compressor where useful work is recovered.

  3. Duration Test Report for the Viryd CS8 Wind Turbine

    SciTech Connect (OSTI)

    Roadman, J.; Murphy, M.; van Dam, J.

    2013-06-01T23:59:59.000Z

    This report summarizes the results of a duration noise test that the National Renewable Energy Laboratory (NREL) conducted on the Viryd CS8 wind turbine. This test was conducted in accordance with Clause 9.4 of the International Electrotechnical Commission's (IEC) standard, Wind turbines - Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed. 2.0:2006-03. NREL researchers evaluated the turbine based on structural integrity and material degradation, quality of environmental protection, and dynamic behavior.

  4. Tempe Transportation Division: LNG Turbine Hybrid Electric Buses

    SciTech Connect (OSTI)

    Not Available

    2002-02-01T23:59:59.000Z

    Fact sheet describes the performance of liquefied natural gas (LNG) turbine hybrid electric buses used in Tempe's Transportation Division.

  5. Dynamic analysis of a 5 megawatt offshore floating wind turbine

    E-Print Network [OSTI]

    Harriger, Evan Michael

    2011-01-01T23:59:59.000Z

    Why offshore wind energy? Offshore wind turbines have theturbine will also uncover potential problems that exist with offshore wind energy.

  6. Understanding Trends in Wind Turbine Prices Over the Past Decade

    E-Print Network [OSTI]

    Bolinger, Mark

    2012-01-01T23:59:59.000Z

    interconnection – both of which are assumed to fall outside of the scope of most turbine supply agreements

  7. Establishment of Small Wind Turbine Regional Test Centers (Presentation)

    SciTech Connect (OSTI)

    Sinclair, K.

    2011-09-16T23:59:59.000Z

    This presentation offers an overview of the Regional Test Centers project for Small Wind Turbine testing and certification.

  8. Designing Micro Wind Turbines for Portable Power Generation Francois Hogan

    E-Print Network [OSTI]

    Barthelat, Francois

    to the design of a wind turbine rotor. Number of blades The number of blades does not have a significant impact on the efficiency of a wind turbine. We have chosen a two blade design because of ease of fabrication in order) (2) · This two blade micro wind turbine meets the optimal specifications to ensure good efficiency

  9. TECHNICALADVANCES IN EPOXY TECHNOLOGY FOR WIND TURBINE BLADE COMPOSITE FABRICATION

    E-Print Network [OSTI]

    TECHNICALADVANCES IN EPOXY TECHNOLOGY FOR WIND TURBINE BLADE COMPOSITE FABRICATION George C. Jacob reliability in many demanding applications including components for aerospace and wind turbine blades. While in operation, wind turbine blades are subjected to significant stresses from their movement, wind and other

  10. Ris-R-1352(EN) Models for Wind Turbines

    E-Print Network [OSTI]

    #12;Contents 1 Preface 5 2 Author's Notes 7 3 Theory of Rods applied to Wind Turbine Blades 9 3 and Eigenvectors 17 3.6 Conclusion 19 3.7 Appendix 21 4 A Mathematical Model for Wind Turbine Blades 23 4 of Freedom for the Cross Section 57 9 Self Excitation of Wind Turbine Blades 59 9.1 Introduction 59 9

  11. A Simplified Morphing Blade for Horizontal Axis Wind Turbines

    E-Print Network [OSTI]

    Boyer, Edmond

    A Simplified Morphing Blade for Horizontal Axis Wind Turbines Weijun WANG , St´ephane CARO, Fouad salinas@hotmail.com The aim of designing wind turbine blades is to improve the power capture ability by adjusting the twist of the blade's root and tip. To evaluate the performance of wind turbine blades

  12. AIAA980057 RELATING TURBULENCE TO WIND TURBINE BLADE LOADS

    E-Print Network [OSTI]

    Sweetman, Bert

    AIAA­98­0057 RELATING TURBULENCE TO WIND TURBINE BLADE LOADS: PARAMETRIC STUDY WITH MULTIPLE that is most useful in estimating fatigue loads on wind turbine blades. The histograms of rainflow counted turbulence measures---can be used to estimate fatigue loads on wind turbine blades. We first de­ scribe

  13. Load Alleviation on Wind Turbine Blades using Variable Airfoil Geometry

    E-Print Network [OSTI]

    Load Alleviation on Wind Turbine Blades using Variable Airfoil Geometry Peter Bjřrn Andersen, Mac Loads, Trailing Edge Flaps, PID control, Signal Noise. 1 Introduction Wind turbine blades are subject to 40% when signal noise is added to the control. Keywords: Wind Turbine, Load Alleviation, Fatigue

  14. Sparkr Blade Test Centre Modal Analysis of Wind Turbine Blades

    E-Print Network [OSTI]

    Sparkćr Blade Test Centre Modal Analysis of Wind Turbine Blades Modal analysis is the process the modes constitute a complete dynamic description of the wind turbine blade. The modes of vibration represent the inherent dynamic properties of the wind turbine blade. The range of applications for modal

  15. AIAA-2004-1184 AN AEROACOUSTIC ANALYSIS OF WIND TURBINES*

    E-Print Network [OSTI]

    , the wind turbine blades can experience large changes in angle of attack associated with sudden large gusts, horizontal axis wind turbines. These blade/inflow/tower wake interactions can result in dynamic stall overAIAA-2004-1184 1 AN AEROACOUSTIC ANALYSIS OF WIND TURBINES* Philip J. Morris, Lyle N. Long

  16. Ultimate strength of a large wind turbine blade

    E-Print Network [OSTI]

    Ultimate strength of a large wind turbine blade Find Mřlholt Jensen Risř-PhD-34(EN) ISBN 978 2008 #12;#12;Author: Find Mřlholt Jensen Title: Ultimate strength of a large wind turbine blade contains a study of the structural static strength of wind turbine blades loaded in flap-wise direction

  17. Heuristics for Balancing Turbine Fans Samir V. Amiouny

    E-Print Network [OSTI]

    Bartholdi III, John J.

    Reiger, 1986. In some cases, such as in the constructionof hydraulic, steam or gas turbines, fan bladesHeuristics for Balancing Turbine Fans Samir V. Amiouny John J. Bartholdi, III John H. Vande Vate April 20, 1997 Abstract We develop heuristics for a problem that models the static balancing of turbine

  18. Design of a Transonic Research Turbine Facility Ruolong Ma*

    E-Print Network [OSTI]

    Morris, Scott C.

    the power generated by the turbine to load-share with a motor to drive a centrifugal compressor which and performance of modern gas-turbine engines. A detailed address of the various opportunities for flow control throughout the gas-turbine engine in terms of their impact on each engine component was given by Lord et al.1

  19. Applications of a Turbomachinery Design Tool for Compressors and Turbines

    E-Print Network [OSTI]

    Cincinnati, University of

    Applications of a Turbomachinery Design Tool for Compressors and Turbines Mark G. Turner University-AXI, is briefly described and demonstrated for applications of a two stage compressor and a three stage turbine web sites. The design system can be used to design multistage compressors and turbines from a small

  20. Gas Turbines Increase the Energy Efficiency of Industrial Processes

    E-Print Network [OSTI]

    Banchik, I. N.; Bohannan, W. R.; Stork, K.; McGovern, L. J.

    1981-01-01T23:59:59.000Z

    It is a well known fact that the gas turbine in a combined cycle has a higher inherent Carnot efficiency than the steam cycle which has been more generally accepted by industry. Unlike steam turbines, gas turbines do not require large boiler feed...

  1. TWO-PHASE FLOW TURBINE FOR COGENERATION, GEOTHERMAL,

    E-Print Network [OSTI]

    TWO-PHASE FLOW TURBINE FOR COGENERATION, GEOTHERMAL, SOLAR AND OTHER APPLICATIONS Prepared For REPORT (FAR) TWO-PHASE FLOW TURBINE FOR COGENERATION, GEOTHERMAL, SOLAR AND OTHER APPLICATIONS EISG://www.energy.ca.gov/research/index.html. #12;Page 1 Two-Phase Flow Turbine For Cogeneration, Geothermal, Solar And Other Applications EISG

  2. Symbolic identification for fault detection in aircraft gas turbine engines

    E-Print Network [OSTI]

    Ray, Asok

    Symbolic identification for fault detection in aircraft gas turbine engines S Chakraborty, S Sarkar and computationally inexpensive technique of component-level fault detection in aircraft gas-turbine engines identification, gas turbine engines, language-theoretic analysis 1 INTRODUCTION The propulsion system of modern

  3. Statistical estimation of multiple faults in aircraft gas turbine engines

    E-Print Network [OSTI]

    Ray, Asok

    415 Statistical estimation of multiple faults in aircraft gas turbine engines S Sarkar, C Rao of multiple faults in aircraft gas-turbine engines, based on a statistical pattern recognition tool called commercial aircraft engine. Keywords: aircraft propulsion, gas turbine engines, multiple fault estimation

  4. Reliable Gas Turbine Output: Attaining Temperature Independent Performance 

    E-Print Network [OSTI]

    Neeley, J. E.; Patton, S.; Holder, F.

    1992-01-01T23:59:59.000Z

    Improvements in gas turbine efficiency, coupled with dropping gas prices, has made gas turbines a popular choice of utilities to supply peaking as well as base load power in the form of combined cycle power plants. Today, because of the gas turbine...

  5. Reduction of Film Coolant in High Pressure Turbines

    E-Print Network [OSTI]

    Wirsum Institute of Power Plant Technology, Steam and Gas Turbines, RWTH Aachen Prof. Dr.-Ing. Ingo RöhleReduction of Film Coolant in High Pressure Turbines Bachelor Thesis in Computational Engineering Institute of Propulsion Technology, German Aerospace Center #12;Abstract Gas turbine development has been

  6. Stochastic Analysis of Wind Turbine Power Curves Edgar Anahua

    E-Print Network [OSTI]

    Peinke, Joachim

    Stochastic Analysis of Wind Turbine Power Curves Edgar Anahua Oldenburg 2007 Zur Homepage der Dissertation #12;#12;Stochastic Analysis of Wind Turbine Power Curves Edgar Anahua Von der Fakult¨at f the wind turbine's power per- formance directly from high frequency fluctuating measurements. In particular

  7. Modelling of transient wind turbine loads during pitch motion

    E-Print Network [OSTI]

    Modelling of transient wind turbine loads during pitch motion Niels.N. Sřrensen, Helge Aa. Madsen In connection with the design of wind turbines and their control algorithms, the transient loads, especially widespread tool in the wind turbine industry, the time constants necessary to describe these problems

  8. Nonlinear Control of a Wind Turbine Sven Creutz Thomsen

    E-Print Network [OSTI]

    Nonlinear Control of a Wind Turbine Sven Creutz Thomsen Kongens Lyngby 2006 #12; Technical describes analysis of various nonlinear control methods for controlling a wind turbine. High speed wind Modeling and analysis 5 2 Model descriptions 7 2.1 Variable speed wind turbine

  9. Nonlinear Control of a Wind Turbine Sven Creutz Thomsen

    E-Print Network [OSTI]

    Nonlinear Control of a Wind Turbine Sven Creutz Thomsen Kongens Lyngby 2006 #12;Technical describes analysis of various nonlinear control methods for controlling a wind turbine. High speed wind descriptions 7 2.1 Variable speed wind turbine . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2 Constant

  10. EFFECTS OF FIBER WAVINESS ON COMPOSITES FOR WIND TURBINE BLADES

    E-Print Network [OSTI]

    EFFECTS OF FIBER WAVINESS ON COMPOSITES FOR WIND TURBINE BLADES J.F. Mandell D.D. Samborsky and L Composite materials of interest for wind turbine blades use relatively low cost fibers, resins and processes WORDS: Composite Materials, Fiber Waviness, Compressive Strength #12;1. INTRODUCTION Wind turbine blades

  11. Danehy Park Wind Turbine Project Preliminary Assessment Report

    E-Print Network [OSTI]

    Danehy Park Wind Turbine Project Preliminary Assessment Report Danehy Park Project Group Wind turbine. Katherine Dykes and Sungho Lee for their leadership, guidance, and feedback. #12;1 Introduction sensors were mounted is marked with a yellow star. #12;2 Turbine Evaluation Set This report evaluates

  12. Ris-R-1209(EN) European Wind Turbine Testing

    E-Print Network [OSTI]

    Risø-R-1209(EN) European Wind Turbine Testing Procedure Developments Task 1: Measurement Method to Verify Wind Turbine Performance Character- istics Raymond Hunter RES Task coordinator Troels Friis assessment and wind turbine power performance testing. A standards maintenance team is revising the current

  13. innovati nWind Turbine Design Innovations Drive Industry Transformation

    E-Print Network [OSTI]

    innovati nWind Turbine Design Innovations Drive Industry Transformation For more than 20 years. Tackling Turbine Blade Inefficiencies In 1984, NREL researchers began investigating problems with wind turbine blade designs. Inefficiency was a significant barrier to lowering the cost of wind energy

  14. Wind Turbine Test \\^ind Matic WM 15S

    E-Print Network [OSTI]

    00 ·2 V. v/ RisoM-2481 Wind Turbine Test \\^ind Matic WM 15S Troels Friis Pedersent The Test Station for Windmills Riso National Laboratory, DK-4000 Roskilde, Denmark July 1986 #12;#12;RIS0-M-2481 WIND TURBINE describes standard measurements performed on a Wind-Matic WM 15S, 55 kW wind turbine. The measurements

  15. Vortex Lattice Modelling of Winglets on Wind Turbine Blades

    E-Print Network [OSTI]

    Vortex Lattice Modelling of Winglets on Wind Turbine Blades Mads Døssing Risø-R-1621(EN) Risø Title: Vortex Lattice Modelling of Winglets on Wind Turbine Blades Departments: Wind Energy Department turbines can be increased by the use of winglets without increasing the swept area. This makes them

  16. Ris R1024EN Design of the Wind Turbine

    E-Print Network [OSTI]

    Ris R1024EN Design of the Wind Turbine Airfoil Family RIS AXX Kristian S. Dahl, Peter Fuglsang Ris National Laboratory, Roskilde, Denmark December 1998 #12;Abstract A method for design of wind turbine turbine. The airfoils are designed to have maximum lift-drag ratio until just below stall, a design lift

  17. Riso-M-2546 g Wind Turbine Test

    E-Print Network [OSTI]

    Riso-M-2546 g Wind Turbine Test Wind Matic WM 17S Troels Friis Pedersen The Test Station for Windmills Riso National Laboratory, DK-4000 Roskilde Denmark April 1986 #12;#12;RIS0-M-2546 WIND TURBINE describes standard measurements performed on a Wind-Matic WM 17S, 75 kW wind turbine. The measurements

  18. SOUND COMPLIANCE MONITORING FOR THE GAMESA WIND TURBINE

    E-Print Network [OSTI]

    Firestone, Jeremy

    SOUND COMPLIANCE MONITORING FOR THE GAMESA WIND TURBINE UD - LEWES, DELAWARE January 2011 ` #12;SOUND COMPLIANCE MONITORING FOR THE GAMESA WIND TURBINE AT THE UNIVERSITY OF DELAWARE LEWES, DELAWARE A Gamesa G90 2.0-MW wind turbine operates at the University of Delaware (UD), Lewes campus on a parcel

  19. A NEW GAS TURBINE ENGINE CONCEPT FOR ELECTRICITY

    E-Print Network [OSTI]

    A NEW GAS TURBINE ENGINE CONCEPT FOR ELECTRICITY GENERATION WITH INCREASED EFFICIENCY AND POWER REPORT (FAR) A NEW GAS TURBINE ENGINE CONCEPT FOR ELECTRICITY GENERATION WITH INCREASED EFFICIENCY://www.energy.ca.gov/research/index.html. #12;Page 1 A New Gas Turbine Engine Concept For Electricity Generation With Increased

  20. IMPLEMENTATION OF WIND TURBINE CONTROLLERS W.E.Leithead

    E-Print Network [OSTI]

    Duffy, Ken

    IMPLEMENTATION OF WIND TURBINE CONTROLLERS D.J.Leith W.E.Leithead Department of Electronic-speed wind turbines are considered, namely, (1) accommodation of the strongly nonlinear rotor aerodynamics derived and extended to cater for all wind turbine configurations. A rigorous stability analysis

  1. Working on new gas turbine cycle for heat pump drive

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    Working on new gas turbine cycle for heat pump drive FILE COPY TAP By Irwin Stambler, Field Editor DO NOT 16 0 REMOVE 16 Small recuperated gas turbine engine, design rated at 13 hp and 27% efficiency of the cycle- as a heat pump drive for commercial installations. Company is testing prototype gas turbine

  2. " *.--S, * b different of the turbine's blades in

    E-Print Network [OSTI]

    Ranganathan, Jai

    The Economist #12;" *.--S, * b different of the turbine's blades in unpre&&l$$ ,and confusing ways. The clutter tbi!3-ba,useson the screen is made worse whe+%e signalb bounced around between different turbines-scaleversion atthe siteof a singlewind turbine. It was ableto show a different

  3. Turbine Burners: Flameholding in Accelerating Flow W. A. Sirignano1

    E-Print Network [OSTI]

    Liu, Feng

    1 Turbine Burners: Flameholding in Accelerating Flow W. A. Sirignano1 , D. Dunn-Rankin2 , F. Liu3 B, Irvine Abstract A review of turbine-burner research and some relevant background issues is presented. Previous work on thermal cycle analysis for augmentative combustion in the passages of the turbine

  4. Disturbance Control of the Hydraulic Brake in a Wind Turbine

    E-Print Network [OSTI]

    Yang, Zhenyu

    Disturbance Control of the Hydraulic Brake in a Wind Turbine Frank Jepsen, Anders Søborg brake in a wind turbine. Brake torque is determined by friction coefficient and clamp force; the latter brake is one1 of the two independent brake systems in a wind turbine. As a consequence of the gearing

  5. ACOUSTIC STUDY OF THE UD / GAMESA WIND TURBINE PROJECT

    E-Print Network [OSTI]

    Firestone, Jeremy

    ACOUSTIC STUDY OF THE UD / GAMESA WIND TURBINE PROJECT LEWES, DELAWARE January 2009 #12;ACOUSTIC STUDY OF THE UNIVERSITY OF DELAWARE / GAMESA WIND TURBINE PROJECT LEWES, DELAWARE Prepared for SUMMARY The University of Delaware (UD), Lewes proposes to locate a Gamesa G90 2.0MW wind turbine

  6. Estimation of Wind Speed in Connection to a Wind Turbine

    E-Print Network [OSTI]

    Estimation of Wind Speed in Connection to a Wind Turbine X. Ma #3; , N. K. Poulsen #3; , H. Bindner y December 20, 1995 Abstract The wind speed varies over the rotor plane of wind turbine making the wind speed on the rotor plane will be estimated by using a wind turbine as a wind measuring device

  7. Mechanisms of amplitude modulation in wind turbine , A. J. Bullmoreb

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Mechanisms of amplitude modulation in wind turbine noise M. Smitha , A. J. Bullmoreb , M. M. Candb produced by wind turbines is inherently time varying. This amplitude modulation is normally due The environmental noise impact of wind turbine generators has to be assessed when planning new installations

  8. Dynamic wind turbine models in power system simulation tool

    E-Print Network [OSTI]

    Dynamic wind turbine models in power system simulation tool DIgSILENT Anca D. Hansen, Florin Iov Iov, Poul Sørensen, Nicolaos Cutululis, Clemens Jauch, Frede Blaabjerg Title: Dynamic wind turbine system simulation tool PowerFactory DIgSILENT for different wind turbine concepts. It is the second

  9. Dynamics and Fatigue Damage of Wind Turbine Rotors

    E-Print Network [OSTI]

    6 3 RiS0-Rr512 Dynamics and Fatigue Damage of Wind Turbine Rotors during Steady Operation Peter OF WIND TURBINE ROTORS DURING STEADY OPERATION Peter Hauge Madsen, Sten Frandsen, William E. Holley-carrying capacity of a wind turbine rotor with respect to short-term strength and material fatigue are presented

  10. Helical Turbine and Fish Safety By Alexander Gorlov, August, 2010

    E-Print Network [OSTI]

    Gorban, Alexander N.

    1 Helical Turbine and Fish Safety By Alexander Gorlov, August, 2010 Abstract The objective of this paper is to describe research using the Helical Turbine for hydropower with particular focus on fish). Correspondingly, the following two conclusions are formulated. Probability of fish kill by kinetic turbines

  11. LIGHTNING EXPOSURE OF WIND TURBINES University of Toronto

    E-Print Network [OSTI]

    Lehn, Peter W.

    LIGHTNING EXPOSURE OF WIND TURBINES Dale Dolan University of Toronto e-mail: dale@ecf.utoronto.ca Abstract This paper applies the electrogeometric model of lightning exposure to a wind turbine to compute. For a typical 45 m wind turbine, the probability of being struck by a downward negative flash, as predicted

  12. Duration Test Report for the Entegrity EW50 Wind Turbine

    SciTech Connect (OSTI)

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

    2012-12-01T23:59:59.000Z

    This report summarizes the results of a duration test that NREL conducted on the Entegrity EW50 wind turbine. This test was conducted in accordance with the International Electrotechnical Commissions' (IEC) standard, Wind Turbine Generator System Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed.2.0, 2006-03.

  13. Dynamic Simulation of DFIG Wind Turbines on FPGA Boards

    E-Print Network [OSTI]

    Zambreno, Joseph A.

    Dynamic Simulation of DFIG Wind Turbines on FPGA Boards Hao Chen, Student Member, IEEE, Song Sun is a friction coefficient. The wind turbine model is based on the relation between the upstream wind speed V w + 1 where p is the air density; Rw is the wind turbine radius; cp (A, (3) is the performance

  14. Detection of aeroacoustic sound sources on aircraft and wind turbines

    E-Print Network [OSTI]

    Twente, Universiteit

    Detection of aeroacoustic sound sources on aircraft and wind turbines Stefan Oerlemans #12;Detection of aeroacoustic sound sources on aircraft and wind turbines S. Oerlemans Thesis University;DETECTION OF AEROACOUSTIC SOUND SOURCES ON AIRCRAFT AND WIND TURBINES PROEFSCHRIFT ter verkrijging van de

  15. Cambridge Danehy Park Wind Turbine Preliminary Project Assessment

    E-Print Network [OSTI]

    Cambridge Danehy Park Wind Turbine Preliminary Project Assessment Overview MIT Wind Energy Projects 4 / 25 2.5 / 25 Rated Wind Speed (m/s) 13 10 14.5 ~15 12 The above turbines were chosen to provide, several recent studies examining birds and wind turbines have observed that most birds usually avoid

  16. Ris-R-1111(EN) Ultimate Loading of Wind Turbines

    E-Print Network [OSTI]

    Risø-R-1111(EN) Ultimate Loading of Wind Turbines Gunner Chr. Larsen, Knut Ronold, Hans E analysis as well as a wind turbine reliability study. In the wind climate analysis, the distribution to analyse wind turbine components with respect to failure in ultimate loading, and in addition to establish

  17. Fast Verification of Wind Turbine Power Summary of Project Results

    E-Print Network [OSTI]

    Fast Verification of Wind Turbine Power Curves: Summary of Project Results by: Cameron Brown ­ s equation on high frequency wind turbine measurement data sampled at one sample per second or more. The aim's Nordtank wind turbine at the Risø site, the practical application of this new method was tested

  18. Development of Wind Turbines Prototyping Software Under Matlab/Simulink

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    204 1 Development of Wind Turbines Prototyping Software Under Matlab/Simulink® Through present the development of a wind turbine prototyping software under Matlab/Simulink® through and the end of 1999, around 75% of all new grid-connected wind turbines worldwide were installed in Europe [3

  19. Control of Wind Turbines for Power Regulation and

    E-Print Network [OSTI]

    Control of Wind Turbines for Power Regulation and Load Reduction Juan Jose Garcia Quirante Kongens regulation and load reduction and their ensemble in a variable-speed wind turbine. The power regulation aspects of mathematical modelling of wind turbines, and especially the control methods suited for power

  20. Scour around an offshore wind turbine W.F. Louwersheimer

    E-Print Network [OSTI]

    Langendoen, Koen

    Scour around an offshore wind turbine MSc Thesis W.F. Louwersheimer January, 2007 Delft University #12;Scour around an offshore wind turbine Delft University of Technology Ballast Nedam - Egmond iii Scour around an offshore wind turbine W.F. Louwersheimer Student number 1067419 January, 2007

  1. Quantifying the hurricane risk to offshore wind turbines

    E-Print Network [OSTI]

    Jaramillo, Paulina

    Quantifying the hurricane risk to offshore wind turbines Stephen Rosea , Paulina Jaramilloa,1. Turbine tower buckling has been observed in typhoons, but no offshore wind turbines have yet been built be destroyed by hurricanes in an offshore wind farm. We apply this model to estimate the risk to offshore wind

  2. RELIABILITY COMPARISON MODELS FOR OFFSHORE WIND TURBINES (OWT)

    E-Print Network [OSTI]

    Bernstein, Joseph B.

    RELIABILITY COMPARISON MODELS FOR OFFSHORE WIND TURBINES (OWT) Yizhou Lu, T. M. Delorm, A. Christou of survivor functions R(t) of drive-trains, after 1 year of operation, between Offshore Wind Turbine (OWT) vs of the reliability of these 5 Types Surrogate failure rate data Onshore wind turbines (OT) 1-1.5MW CONCLUSIONS

  3. Potential Flow Modelling for Wind Turbines Shane Cline

    E-Print Network [OSTI]

    Victoria, University of

    Potential Flow Modelling for Wind Turbines by Shane Cline B.Sc., University of Toledo, 2003 M means, without the permission of the author. #12;ii Potential Flow Modelling for Wind Turbines by Shane potential flow methods are a promising alternative to mainstream wind turbine aerodynamics tools

  4. Design Loads for Wind Turbines using the Environmental Contour Method

    E-Print Network [OSTI]

    Manuel, Lance

    Design Loads for Wind Turbines using the Environmental Contour Method Korn Saranyasoontorn, TX 78712 When interest is in establishing ultimate design loads for wind turbines such that a service). The parametric conditional load distri- butions require extensive turbine response simulations over the entire

  5. Low frequency noise from MW wind turbines --mechanisms of generation

    E-Print Network [OSTI]

    Low frequency noise from MW wind turbines -- mechanisms of generation and its modeling Helge MW wind turbines -- mechanisms of generation and its modeling Department: Department of Wind Energy turbine has been simulated with a noise prediction model from NASA in US. Running the model

  6. Deployment Effects of Marin Renewable Energy Technologies

    SciTech Connect (OSTI)

    Brian Polagye; Mirko Previsic

    2010-06-17T23:59:59.000Z

    Given proper care in siting, design, deployment, operation and maintenance, marine and hydrokinetic technologies could become one of the more environmentally benign sources of electricity generation. In order to accelerate the adoption of these emerging hydrokinetic and marine energy technologies, navigational and environmental concerns must be identified and addressed. All developing hydrokinetic projects involve a wide variety of stakeholders. One of the key issues that site developers face as they engage with this range of stakeholders is that many of the possible conflicts (e.g., shipping and fishing) and environmental issues are not well-understood, due to a lack of technical certainty. In September 2008, re vision consulting, LLC was selected by the Department of Energy (DoE) to apply a scenario-based approach to the emerging wave and tidal technology sectors in order to evaluate the impact of these technologies on the marine environment and potentially conflicting uses. The project’s scope of work includes the establishment of baseline scenarios for wave and tidal power conversion at potential future deployment sites. The scenarios will capture variations in technical approaches and deployment scales to properly identify and characterize environmental impacts and navigational effects. The goal of the project is to provide all stakeholders with an improved understanding of the potential effects of these emerging technologies and focus all stakeholders onto the critical issues that need to be addressed. This groundwork will also help in streamlining siting and associated permitting processes, which are considered key hurdles for the industry’s development in the U.S. today. Re vision is coordinating its efforts with two other project teams funded by DoE which are focused on regulatory and navigational issues. The results of this study are structured into three reports: 1. Wave power scenario description 2. Tidal power scenario description 3. Framework for Identifying Key Environmental Concerns This is the second report in the sequence and describes the results of conceptual feasibility studies of tidal power plants deployed in Tacoma Narrows, Washington. The Narrows contain many of the same competing stakeholder interactions identified at other tidal power sites and serves as a representative case study. Tidal power remains at an early stage of development. As such, a wide range of different technologies are being pursued by different manufacturers. In order to properly characterize impacts, it is useful to characterize the range of technologies that could be deployed at the site of interest. An industry survey informs the process of selecting representative tidal power devices. The selection criteria is that such devices are at an advanced stage of development to reduce technical uncertainties and that enough data are available from the manufacturers to inform the conceptual design process of this study. Further, an attempt is made to cover the range of different technologies under development to capture variations in potential environmental effects. A number of other developers are also at an advanced stage of development including Verdant Power, which has demonstrated an array of turbines in the East River of New York, Clean Current, which has demonstrated a device off Race Rocks, BC, and OpenHydro, which has demonstrated a device at the European Marine Energy Test Center and is on the verge of deploying a larger device in the Bay of Fundy. MCT demonstrated their device both at Devon (UK) and Strangford Narrows (Northern Ireland). Furthermore OpenHydro, CleanCurrent, and MCT are the three devices being installed at the Minas Passage (Canada). Environmental effects will largely scale with the size of tidal power development. In many cases, the effects of a single device may not be measurable, while larger scale device arrays may have cumulative impacts that differ significantly from smaller scale deployments. In order to characterize these effects, scenarios are established at three deployment scales which nom

  7. Meteorological aspects of siting large wind turbines

    SciTech Connect (OSTI)

    Hiester, T.R.; Pennell, W.T.

    1981-01-01T23:59:59.000Z

    This report, which focuses on the meteorological aspects of siting large wind turbines (turbines with a rated output exceeding 100 kW), has four main goals. The first is to outline the elements of a siting strategy that will identify the most favorable wind energy sites in a region and that will provide sufficient wind data to make responsible economic evaluations of the site wind resource possible. The second is to critique and summarize siting techniques that were studied in the Department of Energy (DOE) Wind Energy Program. The third goal is to educate utility technical personnel, engineering consultants, and meteorological consultants (who may have not yet undertaken wind energy consulting) on meteorological phenomena relevant to wind turbine siting in order to enhance dialogues between these groups. The fourth goal is to minimize the chances of failure of early siting programs due to insufficient understanding of wind behavior.

  8. Methods of making wind turbine rotor blades

    DOE Patents [OSTI]

    Livingston, Jamie T. (Pensacola, FL); Burke, Arthur H. E. (Gulf Breeze, FL); Bakhuis, Jan Willem (Nijverdal, NL); Van Breugel, Sjef (Enschede, NL); Billen, Andrew (Daarlerveen, NL)

    2008-04-01T23:59:59.000Z

    A method of manufacturing a root portion of a wind turbine blade includes, in an exemplary embodiment, providing an outer layer of reinforcing fibers including at least two woven mats of reinforcing fibers, providing an inner layer of reinforcing fibers including at least two woven mats of reinforcing fibers, and positioning at least two bands of reinforcing fibers between the inner and outer layers, with each band of reinforcing fibers including at least two woven mats of reinforcing fibers. The method further includes positioning a mat of randomly arranged reinforcing fibers between each pair of adjacent bands of reinforcing fibers, introducing a polymeric resin into the root potion of the wind turbine blade, infusing the resin through the outer layer, the inner layer, each band of reinforcing fibers, and each mat of random reinforcing fibers, and curing the resin to form the root portion of the wind turbine blade.

  9. Load attenuating passively adaptive wind turbine blade

    DOE Patents [OSTI]

    Veers, Paul S. (Albuquerque, NM); Lobitz, Donald W. (Albuquerque, NM)

    2003-01-01T23:59:59.000Z

    A method and apparatus for improving wind turbine performance by alleviating loads and controlling the rotor. The invention employs the use of a passively adaptive blade that senses the wind velocity or rotational speed, and accordingly modifies its aerodynamic configuration. The invention exploits the load mitigation prospects of a blade that twists toward feather as it bends. The invention includes passively adaptive wind turbine rotors or blades with currently preferred power control features. The apparatus is a composite fiber horizontal axis wind-turbine blade, in which a substantial majority of fibers in the blade skin are inclined at angles of between 15 and 30 degrees to the axis of the blade, to produces passive adaptive aeroelastic tailoring (bend-twist coupling) to alleviate loading without unduly jeopardizing performance.

  10. Load attenuating passively adaptive wind turbine blade

    DOE Patents [OSTI]

    Veers, Paul S.; Lobitz, Donald W.

    2003-01-07T23:59:59.000Z

    A method and apparatus for improving wind turbine performance by alleviating loads and controlling the rotor. The invention employs the use of a passively adaptive blade that senses the wind velocity or rotational speed, and accordingly modifies its aerodynamic configuration. The invention exploits the load mitigation prospects of a blade that twists toward feather as it bends. The invention includes passively adaptive wind turbine rotors or blades with currently preferred power control features. The apparatus is a composite fiber horizontal axis wind-turbine blade, in which a substantial majority of fibers in the blade skin are inclined at angles of between 15 and 30 degrees to the axis of the blade, to produces passive adaptive aeroelastic tailoring (bend-twist coupling) to alleviate loading without unduly jeopardizing performance.

  11. Air permitting guidelines for combustion turbine projects

    SciTech Connect (OSTI)

    Macak, J.J. III [Mostardi-Platt Associates, Inc., Elmhurst, IL (United States); Schott, G.A. [Westinghouse Electric Corp., Orlando, FL (United States). Power Generation Business Unit

    1997-09-01T23:59:59.000Z

    Before construction can begin on a new combustion turbine facility, an air permit must be obtained. The air permitting process is generally the critical path permit, often taking in excess of one year to receive final approval. Careful consideration and understanding of combustion turbine operational characteristics and air pollutant emissions will expedite the air permitting process. The purpose of this paper is to identify key issues related to combustion turbine operation that will aid in the preparation of air permit applications. However, before applying for an air permit, a pre-application meeting should be held with the regulatory agency to present an overview of the proposed project, as well as develop the requisite protocols to begin the process.

  12. Industrial Advanced Turbine Systems Program overview

    SciTech Connect (OSTI)

    Esbeck, D.W.

    1995-12-31T23:59:59.000Z

    DOE`s ATS Program will lead to the development of an optimized, energy efficient, and environmentally friendly gas turbine power systems in the 3 to 20 MW class. Market studies were conducted for application of ATS to the dispersed/distributed electric power generation market. The technology studies have led to the design of a gas-fired, recuperated, industrial size gas turbine. The Ceramic Stationary Gas Turbine program continues. In the High Performance Steam Systems program, a 100 hour development test to prove the advanced 1500 F, 1500 psig system has been successfully completed. A market transformation will take place: the customer will be offered a choice of energy conversion technologies to meet heat and power generation needs into the next century.

  13. Wind Turbine Micropitting Workshop: A Recap

    SciTech Connect (OSTI)

    Sheng, S.

    2010-02-01T23:59:59.000Z

    Micropitting is a Hertzian fatigue phenomenon that affects many wind turbine gearboxes, and it affects the reliability of the machines. With the major growth and increasing dependency on renewable energy, mechanical reliability is an extremely important issue. The U.S. Department of Energy has made a commitment to improving wind turbine reliability and the National Renewable Energy Laboratory (NREL) has started a gearbox reliability project. Micropitting as an issue that needed attention came to light through this effort. To understand the background of work that had already been accomplished, and to consolidate some level of collective understanding of the issue by acknowledged experts, NREL hosted a wind turbine micropitting workshop, which was held at the National Wind Technology Center in Boulder, Colorado, on April 15 and 16, 2009.

  14. Stationary turbine component with laminated skin

    DOE Patents [OSTI]

    James, Allister W. (Orlando, FL)

    2012-08-14T23:59:59.000Z

    A stationary turbine engine component, such as a turbine vane, includes a internal spar and an external skin. The internal spar is made of a plurality of spar laminates, and the external skin is made of a plurality of skin laminates. The plurality of skin laminates interlockingly engage the plurality of spar laminates such that the external skin is located and held in place. This arrangement allows alternative high temperature materials to be used on turbine engine components in areas where their properties are needed without having to make the entire component out of such material. Thus, the manufacturing difficulties associated with making an entire component of such a material and the attendant high costs are avoided. The skin laminates can be made of advanced generation single crystal superalloys, intermetallics and refractory alloys.

  15. Fuel Interchangeability Considerations for Gas Turbine Combustion

    SciTech Connect (OSTI)

    Ferguson, D.H.

    2007-10-01T23:59:59.000Z

    In recent years domestic natural gas has experienced a considerable growth in demand particularly in the power generation industry. However, the desire for energy security, lower fuel costs and a reduction in carbon emissions has produced an increase in demand for alternative fuel sources. Current strategies for reducing the environmental impact of natural gas combustion in gas turbine engines used for power generation experience such hurdles as flashback, lean blow-off and combustion dynamics. These issues will continue as turbines are presented with coal syngas, gasified coal, biomass, LNG and high hydrogen content fuels. As it may be impractical to physically test a given turbine on all of the possible fuel blends it may experience over its life cycle, the need to predict fuel interchangeability becomes imperative. This study considers a number of historical parameters typically used to determine fuel interchangeability. Also addressed is the need for improved reaction mechanisms capable of accurately modeling the combustion of natural gas alternatives.

  16. Wind Turbine Generator System Acoustic Noise Test Report for the ARE 442 Wind Turbine

    SciTech Connect (OSTI)

    Huskey, A.; van Dam, J.

    2010-11-01T23:59:59.000Z

    This test was conducted on the ARE 442 as part of the U.S. Department of Energy's (DOE's) 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 Wind Technology Center (NWTC) as a part of this project. Acoustic noise testing is one of up to five tests that may be performed on the turbines, including duration, safety and function, power performance, and power quality tests. The acoustic noise test was conducted to the IEC 61400-11 Edition 2.1.

  17. Turbine bucket for use in gas turbine engines and methods for fabricating the same

    SciTech Connect (OSTI)

    Garcia-Crespo, Andres

    2014-06-03T23:59:59.000Z

    A turbine bucket for use with a turbine engine. The turbine bucket includes an airfoil that extends between a root end and a tip end. The airfoil includes an outer wall that defines a cavity that extends from the root end to the tip end. The outer wall includes a first ceramic matrix composite (CMC) substrate that extends a first distance from the root end to the tip end. An inner wall is positioned within the cavity. The inner wall includes a second CMC substrate that extends a second distance from the root end towards the tip end that is different than the first distance.

  18. Dual-speed wind turbine generation

    SciTech Connect (OSTI)

    Muljadi, E.; Butterfield, C.P. [National Renewable Energy Lab., Golden, CO (United States)] [National Renewable Energy Lab., Golden, CO (United States); Handman, D. [Flowind Corp., San Rafael, CA (United States)] [Flowind Corp., San Rafael, CA (United States)

    1996-10-01T23:59:59.000Z

    Induction generator has been used since the early development of utility-scale wind turbine generation. An induction generator is the generator of choice because of its ruggedness and low cost. With an induction generator, the operating speed of the wind turbine is limited to a narrow range (almost constant speed). Dual- speed operation can be accomplished by using an induction generator with two different sets of winding configurations or by using a dual output drive train to drive two induction generators with two different rated speeds. With single-speed operation, the wind turbine operates at different power coefficients (Cp) as the wind speed varies. Operation at maximum Cp can occur only at a single wind speed. However, if the wind speed.varies across a wider range, the operating Cp will vary significantly. Dual-speed operation has the advantage of enabling the wind turbine to operate at near maximum Cp over a wider range of wind speeds. Thus, annual energy production can be increased. The dual-speed mode may generate less energy than a variable-speed mode; nevertheless, it offers an alternative which captures more energy than single-speed operation. In this paper, dual-speed operation of a wind turbine is investigated. Annual energy production is compared between single-speed and dual-speed operation. One type of control algorithm for dual-speed operation is proposed. Some results from a dynamic simulation will be presented to show how the control algorithm works as the wind turbine is exposed to varying wind speeds.

  19. Inflow Characterization for Marine and Hydrokinetic Energy Devices. FY-2011: Annual Progress Report

    SciTech Connect (OSTI)

    Richmond, Marshall C.; Durgesh, Vibhav; Thomson, Jim; Polagye, Brian

    2011-06-09T23:59:59.000Z

    The Pacific Northwest National Laboratory (PNNL), in collaboration with the Applied Physics Laboratory at the University of Washington (APL-UW), has carried out a detailed preliminary fluid flow field study at site selected for testing of marine and hydrokinetic turbines using Acoustic Doppler Velocimetry (ADV) measurements, Acoustic Doppler Current Profiler (ADCP) measurements, and Conductivity, Temperature and Depth (CTD) measurements. In FY-2011 these measurements were performed continuously for two weeks, in order to collect data during neap and spring tides, as well as during diurnal tidal variations.

  20. MARINE BIOMASS SYSTEM: ANAEROBIC DIGESTION AND PRODUCTION OF METHANE

    E-Print Network [OSTI]

    Haven, Kendall F.

    2011-01-01T23:59:59.000Z

    flow from an on-site steam turbine to raise the kelp to 45°Ca 1200 Kw electric steam turbine/generator system. CapitalFinally, the waste steam stream from the turbine is used to

  1. Measurement of Oil and Gas Emissions from a Marine Seep

    E-Print Network [OSTI]

    Leifer, Ira; Boles, J R; Luyendyk, B P

    2007-01-01T23:59:59.000Z

    oil-gas separator, and gas flux turbine. B. Image of oil-gaslines connected the turbine to the oil-gas separator andoil. Absent the oil-gas separator, the turbine would have

  2. Variable diameter wind turbine rotor blades

    DOE Patents [OSTI]

    Jamieson, Peter McKeich; Hornzee-Jones, Chris; Moroz, Emilian M.; Blakemore, Ralph W.

    2005-12-06T23:59:59.000Z

    A system and method for changing wind turbine rotor diameters to meet changing wind speeds and control system loads is disclosed. The rotor blades on the wind turbine are able to adjust length by extensions nested within or containing the base blade. The blades can have more than one extension in a variety of configurations. A cable winching system, a hydraulic system, a pneumatic system, inflatable or elastic extensions, and a spring-loaded jack knife deployment are some of the methods of adjustment. The extension is also protected from lightning by a grounding system.

  3. Gas turbine rotor straightening -- Case history

    SciTech Connect (OSTI)

    Mazur, Z.; Kubiak, J. [Inst. de Investigaciones Electricas, Temixco (Mexico); Villela, A.; Orozco, J. [Comision Federal de Electricidad, Mexicali (Mexico)

    1999-11-01T23:59:59.000Z

    Due to catastrophic damage, the turbine-compressor rotor of a gas turbine has been bent 0.62 mm. The in-situ repair process of rotor straightening is fully described. The repair process included the design of special fixtures for placing the rotor vertically and then hydraulically tensioning the rotor bolts for discs disassembling and run-out check by a special rotary equipment. After the repair process the rotor run-out fell within the design limits. Finally the rotor was put back into service. The approach to the in-house repair of the rotor bend has been successful and can be widely recommended for users of turbomachinery.

  4. New Siemens Research Turbine - time lapse

    SciTech Connect (OSTI)

    None

    2009-01-01T23:59:59.000Z

    The National Renewable Energy Laboratory (NREL) and Siemens Energy Inc. recently commissioned a new 2.3 megawatt Siemens wind turbine at NREL's National Wind Technology Center. This video shows a time lapse of the installation. The turbine is the centerpiece of a multi-year project to study the performance and aerodynamics of a new class of large, land-based machines — in what will be the biggest government-industry research partnership for wind power generation ever undertaken in the U.S.

  5. Turbine assembly containing an inner shroud

    DOE Patents [OSTI]

    Bagepalli, Bharat Sampathkumaran (Niskayuna, NY); Corman, Gregory Scot (Ballston Lake, NY); Dean, Anthony John (Scotia, NY); DiMascio, Paul Stephen (Clifton Park, NY); Mirdamadi, Massoud (Niskayuna, NY)

    2000-01-01T23:59:59.000Z

    A turbine assembly having a turbine stator, a ceramic inner shroud, and a first spring. The stator has a longitudinal axis and an outer shroud block with opposing and longitudinally outward facing first and second sides. The first side has a longitudinally outward projecting first ledge and has a first side portion located radially outward of the first ledge. The ceramic inner shroud has a first hook portion longitudinally and radially surrounding the first ledge. The first spring is attached to one of the first side portion and the first hook portion and unattachedly and resiliently contacts the other of the first side portion and the first hook portion.

  6. Dynamic stall on wind turbine blades

    SciTech Connect (OSTI)

    Butterfield, C.P.; Simms, D.; Scott, G. [National Renewable Energy Lab., Golden, CO (United States)] [National Renewable Energy Lab., Golden, CO (United States); Hansen, A.C. [Utah Univ., Salt Lake City, UT (United States)] [Utah Univ., Salt Lake City, UT (United States)

    1991-12-01T23:59:59.000Z

    Dynamic loads must be predicted accurately in order to estimate the fatigue life of wind turbines operating in turbulent environments. Dynamic stall contributes to increased dynamic loads during normal operation of all types of horizontal-axis wind turbine (HAWTs). This report illustrates how dynamic stall varies throughout the blade span of a 10 m HAWT during yawed and unyawed operating conditions. Lift, drag, and pitching moment coefficients during dynamics stall are discussed. Resulting dynamic loads are presented, and the effects of dynamic stall on yaw loads are demonstrated using a yaw loads dynamic analysis (YAWDYN). 12 refs., 22 figs., 1 tab.

  7. Multi-pass cooling for turbine airfoils

    DOE Patents [OSTI]

    Liang, George (Palm City, FL)

    2011-06-28T23:59:59.000Z

    An airfoil for a turbine vane of a gas turbine engine. The airfoil includes an outer wall having pressure and suction sides, and a radially extending cooling cavity located between the pressure and suction sides. A plurality of partitions extend radially through the cooling cavity to define a plurality of interconnected cooling channels located at successive chordal locations through the cooling cavity. The cooling channels define a serpentine flow path extending in the chordal direction. Further, the cooling channels include a plurality of interconnected chambers and the chambers define a serpentine path extending in the radial direction within the serpentine path extending in the chordal direction.

  8. Micro-combustor for gas turbine engine

    DOE Patents [OSTI]

    Martin, Scott M. (Oviedo, FL)

    2010-11-30T23:59:59.000Z

    An improved gas turbine combustor (20) including a basket (26) and a multiplicity of micro openings (29) arrayed across an inlet wall (27) for passage of a fuel/air mixture for ignition within the combustor. The openings preferably have a diameter on the order of the quenching diameter; i.e. the port diameter for which the flame is self-extinguishing, which is a function of the fuel mixture, temperature and pressure. The basket may have a curved rectangular shape that approximates the shape of the curved rectangular shape of the intake manifolds of the turbine.

  9. Turbine airfoil with outer wall thickness indicators

    DOE Patents [OSTI]

    Marra, John J; James, Allister W; Merrill, Gary B

    2013-08-06T23:59:59.000Z

    A turbine airfoil usable in a turbine engine and including a depth indicator for determining outer wall blade thickness. The airfoil may include an outer wall having a plurality of grooves in the outer surface of the outer wall. The grooves may have a depth that represents a desired outer surface and wall thickness of the outer wall. The material forming an outer surface of the outer wall may be removed to be flush with an innermost point in each groove, thereby reducing the wall thickness and increasing efficiency. The plurality of grooves may be positioned in a radially outer region of the airfoil proximate to the tip.

  10. Marine Scotland | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup |JilinLu an Group JumpNew Hampshire:Marin Energy AuthorityMarineMarine

  11. Leaf seal for transition duct in turbine system

    DOE Patents [OSTI]

    Flanagan, James Scott; LeBegue, Jeffrey Scott; McMahan, Kevin Weston; Dillard, Daniel Jackson; Pentecost, Ronnie Ray

    2013-06-11T23:59:59.000Z

    A turbine system is disclosed. In one embodiment, the turbine system includes a transition duct. The transition duct includes an inlet, an outlet, and a passage extending between the inlet and the outlet and defining a longitudinal axis, a radial axis, and a tangential axis. The outlet of the transition duct is offset from the inlet along the longitudinal axis and the tangential axis. The transition duct further includes an interface member for interfacing with a turbine section. The turbine system further includes a leaf seal contacting the interface member to provide a seal between the interface member and the turbine section.

  12. Flexible metallic seal for transition duct in turbine system

    DOE Patents [OSTI]

    Flanagan, James Scott; LeBegue, Jeffrey Scott; McMahan, Kevin Weston; Dillard, Daniel Jackson; Pentecost, Ronnie Ray

    2014-04-22T23:59:59.000Z

    A turbine system is disclosed. In one embodiment, the turbine system includes a transition duct. The transition duct includes an inlet, an outlet, and a passage extending between the inlet and the outlet and defining a longitudinal axis, a radial axis, and a tangential axis. The outlet of the transition duct is offset from the inlet along the longitudinal axis and the tangential axis. The transition duct further includes an interface member for interfacing with a turbine section. The turbine system further includes a flexible metallic seal contacting the interface member to provide a seal between the interface member and the turbine section.

  13. Power Performance Test Report for the SWIFT Wind Turbine

    SciTech Connect (OSTI)

    Mendoza, I.; Hur, J.

    2012-12-01T23:59:59.000Z

    This report summarizes the results of a power performance test that NREL conducted on the SWIFT wind turbine. This test was conducted in accordance with the International Electrotechnical Commission's (IEC) standard, Wind Turbine Generator Systems Part 12: Power Performance Measurements of Electricity Producing Wind Turbines, IEC 61400-12-1 Ed.1.0, 2005-12. However, because the SWIFT is a small turbine as defined by IEC, NREL also followed Annex H that applies to small wind turbines. In these summary results, wind speed is normalized to sea-level air density.

  14. Parametric study on performance of cross-flow turbine

    SciTech Connect (OSTI)

    Joshi, C.B. [Tribhuvan Univ., Kathmandu (Nepal); Seshadri, V.; Singh, S.N. [Indian Inst. of Technology, New Delhi (India)

    1995-04-01T23:59:59.000Z

    In the present experimental study, the effect of blade number, nozzle entry arc, and head on the performance characteristics of a cross-flow turbine have been investigated. It has been observed that the efficiency of the turbine increases with increase in blade number, nozzle entry arc, and head. The present investigation has also shown that there is an optimum number of blades for a given nozzle entry arc beyond which the performance of the cross-flow turbine deteriorates. It has also been shown that cross-flow turbines at higher heads do not behave as pure impulse turbines.

  15. NREL Small Wind Turbine Test Project: Mariah Power's Windspire Wind Turbine Test Chronology

    SciTech Connect (OSTI)

    Huskey, A.; Forsyth, T.

    2009-06-01T23:59:59.000Z

    This report presents a chronology of tests conducted at NREL's National Wind Technology Center on Mariah Power's Windspire 1.2-kW wind turbine and a letter of response from Mariah Power.

  16. Inspection system for a turbine blade region of a turbine engine

    DOE Patents [OSTI]

    Smed, Jan P. (Winter Springs, FL); Lemieux, Dennis H. (Casselberry, FL); Williams, James P. (Orlando, FL)

    2007-06-19T23:59:59.000Z

    An inspection system formed at least from a viewing tube for inspecting aspects of a turbine engine during operation of the turbine engine. An outer housing of the viewing tube may be positioned within a turbine engine using at least one bearing configured to fit into an indentation of a support housing to form a ball and socket joint enabling the viewing tube to move during operation as a result of vibrations and other movements. The viewing tube may also include one or more lenses positioned within the viewing tube for viewing the turbine components. The lenses may be kept free of contamination by maintaining a higher pressure in the viewing tube than a pressure outside of the viewing tube and enabling gases to pass through an aperture in a cap at a viewing end of the viewing tube.

  17. Understanding Trends in Wind Turbine Prices Over the Past Decade

    SciTech Connect (OSTI)

    Bolinger, Mark; Wiser, Ryan

    2011-10-26T23:59:59.000Z

    Taking a bottom-up approach, this report examines seven primary drivers of wind turbine prices in the United States, with the goal of estimating the degree to which each contributed to the doubling in turbine prices from 2002 through 2008, as well as the subsequent decline in prices through 2010 (our analysis does not extend into 2011 because several of these drivers are best gauged on a full-year basis due to seasonality issues). The first four of these drivers can be considered, at least to some degree, endogenous influences – i.e., those that are largely within the control of the wind industry – and include changes in: 1) Labor costs, which have historically risen during times of tight turbine supply; 2) Warranty provisions, which reflect technology performance and reliability, and are most often capitalized in turbine prices; 3) Turbine manufacturer profitability, which can impact turbine prices independently of costs; and 4) Turbine design, which for the purpose of this analysis is principally manifested through increased turbine size. The other three drivers analyzed in this study can be considered exogenous influences, in that they can impact wind turbine costs but fall mostly outside of the direct control of the wind industry. These exogenous drivers include changes in: 5) Raw materials prices, which affect the cost of inputs to the manufacturing process; 6) Energy prices, which impact the cost of manufacturing and transporting turbines; and 7) Foreign exchange rates, which can impact the dollar amount paid for turbines and components imported into the United States.

  18. Pitch-controlled variable-speed wind turbine generation

    SciTech Connect (OSTI)

    Muljadi, E.; Butterfield, C.P.

    2000-03-01T23:59:59.000Z

    Wind energy is a viable option to complement other types of pollution-free generation. In the early development of wind energy, the majority of wind turbines were operated at constant speed. Recently, the number of variable-speed wind turbines installed in wind farms has increased and more wind turbine manufacturers are making variable-speed wind turbines. This paper covers the operation of variable-speed wind turbines with pitch control. The system the authors considered is controlled to generate maximum energy while minimizing loads. The maximization of energy was only carried out on a static basis and only drive train loads were considered as a constraint. In medium wind speeds, the generator and power converter control the wind turbine to capture maximum energy from the wind. In the high wind speed region, the wind turbine is controlled to maintain the aerodynamic power produced by the wind turbine. Two methods to adjust the aerodynamic power were investigated: pitch control and generator load control, both of which are employed to control the operation of the wind turbine. The analysis and simulation shows that the wind turbine can be operated at its optimum energy capture while minimizing the load on the wind turbine for a wide range of wind speeds.

  19. High-temperature turbine technology program. Turbine subsystem design report: Low-Btu gas

    SciTech Connect (OSTI)

    Horner, M.W.

    1980-12-01T23:59:59.000Z

    The objective of the US Department of Energy High-Temperature Turbine Technology (DOE-HTTT) program is to bring to technology readiness a high-temperature (2600/sup 0/F to 3000/sup 0/F firing temperature) turbine within a 6- to 10-year duration, Phase II has addressed the performance of component design and technology testing in critical areas to confirm the design concepts identified in the earlier Phase I program. Based on the testing and support studies completed under Phase II, this report describes the updated turbine subsystem design for a coal-derived gas fuel (low-Btu gas) operation at 2600/sup 0/F turbine firing temperature. A commercial IGCC plant configuration would contain four gas turbines. These gas turbines utilize an existing axial flow compressor from the GE product line MS6001 machine. A complete description of the Primary Reference Design-Overall Plant Design Description has been developed and has been documented. Trends in overall plant performance improvement at higher pressure ratio and higher firing temperature are shown. It should be noted that the effect of pressure ratio on efficiency is significally enhanced at higher firing temperatures. It is shown that any improvement in overall plant thermal efficiency reflects about the same level of gain in Cost of Electricity (COE). The IGCC concepts are shown to be competitive in both performance and cost at current and near-term gas turbine firing temperatures of 1985/sup 0/F to 2100/sup 0/F. The savings that can be accumulated over a thirty-year plant life for a water-cooled gas turbine in an IGCC plant as compared to a state-of-the-art coal-fired steam plant are estimated. A total of $500 million over the life of a 1000 MW plant is projected. Also, this IGCC power plant has significant environmental advantages over equivalent coal-fired steam power plants.

  20. Handling Strategies for Import Containers at Marine Terminals

    E-Print Network [OSTI]

    De Castilho, Bernardo; Daganzo, Carlos F.

    1993-01-01T23:59:59.000Z

    Containers at Marine Terminals Bemardo De Castilho Carlos F.Import Containers at Marine Terminals Bernardo De CastilhoFOR IMPORT AT MARINE TERMINALS CONTAINERS BERNARDO DE