91 Matching Results

Search Results

Advanced search parameters have been applied.

in subjects: "Flywheels"

open access

Composite-rim flywheel design

The design of a flywheel which incorporates a circumferentially wound rim is described. The design required the selection of materials and configuration for rim and hub, and a means of attaching the rim to the hub. The method used to fabricate prototype flywheels of this design is discussed.

Date: January 1, 1977

Creator: Reedy, E.D. Jr.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Evaluation of selected drive components for a flywheel powered commuter vehicle. Phase I. Final report

The results of tests performed to evaluate the performance of selected high-speed flywheel bearings and shaft seals are reported, and work performed on the development of a high-speed composite flywheel rotor is described. The overall program objective is to develop a composite flywheel system for primary energy storage in a flywheel powered vehicle. These initial tests were intended to evaluate the performance of full-size composite rotor elements, high-speed bearings and shaft seals for that … more

Date: June 30, 1977

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Probabilistic models of the stress-rupture of composite materials: Phase III. Progress report, June 15, 1978-June 14, 1980

The development of static and time dependent models for the failure of composite materials has been pursued. These models are based on the chain-of-bundles probability model for composite failure wherein local load sharing among non-failed fiber elements in a bundle plays a key role. At the outset, it was believed that the static model was well developed in the literature by others, and that work on the time dependent versions could proceed. In these versions, the viscoelasticity of the matrix … more

Date: March 1, 1980

Creator: Phoenix, S.L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Compilation and summary of technical and economic assessments in the field of energy storage

Information is presented which was extracted from various assessments of energy storage technologies conducted during the past four years, primarily under the auspices of the Office of Energy Systems Research and Development (formerly the Division of Energy Storage Systems). A thorough search of the relevant literature was conducted using the DOE/RECON computerized data base and other sources. Only tabular or graphic material was abstracted from the documents. The material has been organized in… more

Date: October 1, 1981

Creator: DeVries, J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Advanced Power Electronic Interfaces for Distributed Energy Systems Part 1: Systems and Topologies

This report summarizes power electronic interfaces for DE applications and the topologies needed for advanced power electronic interfaces. It focuses on photovoltaic, wind, microturbine, fuel cell, internal combustion engine, battery storage, and flywheel storage systems.

Date: March 1, 2008

Creator: Kramer, W.; Chakraborty, S.; Kroposki, B. & Thomas, H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Electric and Hybrid Vehicle System Research and Development Project: hybrid vehicle potential assessment. Volume V. Flywheel systems

The design, operation and calculated performance of a flywheel-electric hybrid vehicle are discussed. Seven different operating strategies are considered. The calculation procedures are described. The results are plotted. (LCL)

Date: September 30, 1979

Creator: Liddle, S. G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Hybrid vehicle potential assessment. Volume 10. Electric and hybrid vehicle cost handbook

The purpose of this interim cost handbood is to provide a consistent single-point source of data and procedures for estimating the costs of electric and hybrid vehicles. These costs include manufacturing, acquisition (purchase price), operating, and life cycle. Each suggested Cost Estimating Relation (CER) presented herein is a result of the compilation of currently existing cost estimates and cost relationships. No independent cost analysis was performed for this handbook, nor was any analysis… more

Date: September 30, 1979

Creator: Heft, R.C. & Heller, S.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Third Generation Flywheels for electric storage

Electricity is critical to our economy, but growth in demand has saturated the power grid causing instability and blackouts. The economic penalty due to lost productivity in the US exceeds $100 billion per year. Opposition to new transmission lines and power plants, environmental restrictions, and an expected $100 billion grid upgrade cost have slowed system improvements. Flywheel electricity storage could provide a more economical, environmentally benign alternative and slash economic losses i… more

Date: February 29, 2008

Creator: Ricci, Michael, R. & Fiske, O. James

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Impact of flywheel-energy-storage technology upon taxicab fleet operation in a large metropolitan city

The incorporation of flywheel energy storage systems (FESS) into automotive vehicles has been under consideration for some time. Previous studies have suggested that FESS can yield substantial benefits in automotive vehicle operation, particularly for urban driving. An assessment of the impacts resulting from incorporation of FESS into automotive fleets in a large metropolitan city is described. Specifically, the case of taxicab fleet operation within New York City is examined. Unique features … more

Date: January 1, 1981

Creator: Krupka, M.C. & Jackson, S.V.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Railgun power supply system utilizing traction motors and vacuum interrupters

A railgun power supply has been designed that utilizes traction motors, vacuum interrupters and pulse transformers. An assembly of 28 traction motors, which store approximately 75 MJ, energize the primary windings of three pulse transformers at a peak current of 50 kA. At peak current an array of vacuum interrupters disconnects the transformer primary windings and forces the current to flow in the secondary windings. The secondary windings are connected directly to the railgun and require no op… more

Date: January 1, 1985

Creator: Parsons, W. M.; Parker, J. V. & Thullen, P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Flywheel rotor and containment technology development, FY83

The Department of Energy decided to terminate the Flywheel Rotor and Containment Technology Development project during FY 1983. Activities this year included fabrication, inspection, and test evaluation of rotor and containment structures. A peak energy of 700 Wh was stored at an energy density of 70 Wh/kg. In cyclic tests, 10,000 cycles from design speed to half speed were logged without failure. The first test of a lightweight containment structure indicates the need for additional developmen… more

Date: September 12, 1983

Creator: Mohr, P. B. & Walter, C. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Oak Ridge Flywheel Evaluation Laboratory. Annual report, April 1, 1979-September 30, 1979

The Oak Ridge Flywheel Evaluation Laboratory (ORFEL) was assembled, and the initial stages of proof testing were completed in FY 1979. The significant accomplishments for the past year included the establishment of adequate full-time personnel; facility modification to reflect the emphasis on flywheel evaluation over simple testing; and the facility proof test involving two aluminum disk flywheels and one composite flywheel. This report contains details of the FY 1979 program plans for ORFEL, p… more

Date: December 1, 1979

Creator: Steele, R.S. Jr.; Casstevens, J.M. & Sutton, B.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Composite flywheel development completion report, October 1, 1976--September 30, 1977

The UCC-ND Composite Flywheel Development program was initiated at the Oak Ridge Y-12 Plant on May 1, 1976, with the primary objective for the FY 1976--1976T period being the design, fabrication, and testing of a prototype, vehicular-sized, composite flywheel. This initial effort led to the successful testing of the UCC-ND bandwrap flywheel design with a demonstrated energy density performance of 10.1 Wh/lb.

Date: May 1, 1978

Creator: Huddleston, R. L.; Kelly, J. J.; Knight, C. E.; Pollard, R. E. & Post, D. W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Near-term electric test vehicle ETV-2. Phase II. Final report

A unique battery-powered passenger vehicle has been developed that provides a significant improvement over conventional electric vehicle performance, particularly during stop-and-go driving. The vehicle is unique in two major respects: (1) the power system incorporates a flywheel that stores energy during regenerative braking and makes possible the acceleration capability needed to keep up with traffic without reducing range to unacceptable values; and (2) lightweight plastic materials are used… more

Date: April 1, 1981

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Flywheel rotor and containment technology development

The goals of the project are: to develop an economical and practical composite flywheel having an energy density of 88 Wh/kg at failure, an operational energy density of 44 to 55 Wh/kg, and an energy storage capacity of approximately 1 kWh; to determine the suitability of various manufacturing processes for low-cost rotor fabrication; to investigate flywheel and flywheel-systems dynamics; to test and evaluate prototype rotors for use in transportation and stationary applications; and to develop… more

Date: August 11, 1981

Creator: Kulkarni, S.V.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Frequency analysis of a thick-rim flywheel. [NONSAP]

The calculation of natural frequencies of a thick-rim flywheel is presented using two analysis methods: the finite-element method and the transfer matrix method. A listing of the computer program developed using the transfer matrix method is included. The results of the finite-element analyses indicate that the computer programs NONSAP and ADINA are incapable of determining out-of-plane natural frequencies of the flywheel. The results of the analysis using the transfer matrix method are satisfa… more

Date: September 1, 1978

Creator: Fanning, D. N.

Item Type: Report

Partner: UNT Libraries Government Documents Department

[Top View of a Model Economy Engine's Bronze Flywheels and Belt]

Photograph from The Wesley Pettinger Engine Model Collection. Photograph of the top view of a red model Economy engine's bronze flywheels and belt.

Date: 2011

Item Type: Photograph

Partner: UNT Libraries Special Collections

[Close-Up of the Tops of the Bronze Flywheels on a Model Economy Engine]

Photograph from The Wesley Pettinger Engine Model Collection. Close-up photograph of the tops of the bronze flywheels on a model Economy motor.

Date: 2011

Item Type: Photograph

Partner: UNT Libraries Special Collections

open access

Flywheel energy storage using superconducting magnetic bearings

Storage of electrical energy on a utility scale is currently not practicable for most utilities, preventing the full utilization of existing base-load capacity. A potential solution to this problem is Flywheel Energy Storage (FES), made possible by technological developments in high-temperature superconducting materials. Commonwealth Research Corporation (CRC), the research arm of Commonwealth Edison Company, and Argonne National Laboratory are implementing a demonstration project to advance th… more

Date: April 1, 1994

Creator: Abboud, R. G.; Uherka, K.; Hull, J. & Mulcahy, T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Composite flywheel development, April 1--June 30, 1977

Additional experimental prestressed rim evaluations indicate that this technique should permit near full utilization of Kevlar-49 hoop strength in a prestressed flywheel rim with resultant energy densities up to 44 Wh/lb. A finite-element model of the Deltawrap flywheel was generated, and several analyses were made. Design of the containment assembly hardware is 90% complete.

Date: October 1, 1977

Creator: Huddleston, R. L.; Kelly, J. J. & Knight, C. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

AN ASSESSMENT OF FLYWHEEL HIGH POWER ENERGY STORAGE TECHNOLOGY FOR HYBRID VEHICLES

An assessment has been conducted for the DOE Vehicle Technologies Program to determine the state of the art of advanced flywheel high power energy storage systems to meet hybrid vehicle needs for high power energy storage and energy/power management. Flywheel systems can be implemented with either an electrical or a mechanical powertrain. The assessment elaborates upon flywheel rotor design issues of stress, materials and aspect ratio. Twelve organizations that produce flywheel systems submitte… more

Date: February 1, 2012

Creator: Hansen, James Gerald

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

FVB Energy Inc. Technical Assistance Project

The request made by FVB asked for advice and analysis regarding the value of recapturing the braking energy of trains operating on electric light rail transit systems. A specific request was to evaluate the concept of generating hydrogen by electrolysis. The hydrogen would, in turn, power fuel cells that could supply electric energy back into the system for train propulsion or, possibly, also to the grid. To allow quantitative assessment of the potential resource, analysis focused on operations… more

Date: May 17, 2011

Creator: DeSteese, John G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Inertial and inductive energy storage for fusion systems

Energy storage is necessary for all proposed fusion reactor systems. The plasma physics for confinement and primarily the energy transfer time determine the nature of the storage system. Discharge times vary from 0.7 ms for theta-pinch reactors to one to two seconds for tokamak reactors. Three classes of devices are available for energy storage--inductors, capacitors, and rotating machines. The transfer of the energy from the store imposes unusual switching requirements. The broad requirements … more

Date: January 1, 1976

Creator: Rogers, J. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Capacitive, magnetic, and inertial energy storage and high power switching

Many experimental fusion devices can extract energy directly from the power line, but others must store it temporarily, delivering it finally at a power level far in excess of that available from the utility line. Development work has been carried out at LASL on three different energy storage and delivery systems of this kind, which are designed for use in theta-pinch fusion devices. These can be classified as capacitive, inductive, and inertial systems. We present some of the key features of t… more

Date: January 1, 1977

Creator: Swannack, C. E. & Warren, R. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department