Use Of Flywheels Research Articles

The Flywheel Paradigm in Team Sports: A Soccer Approach

ABSTRACT Strength training is a key strategy to improve performance and injury prevention in team sports. Accordingly, several methods have been used, although because of the benefits reported after training based on eccentric contractions, the use of flywheel (FW) devices has extended within the periodization of strength training of team sports. However, nowadays, there is no clear consensus about the parameters used to optimize the training effects. This article examines the research behind these claims and attempts to draw evidence-based conclusions as to the practical implications for a precise use of FW with team-sport players, attending to their specific demands and objectives.

MATHEMATICAL MODEL OF ARTIFICIAL ELECTRICAL CAPACITY FOR REDUCING THE PEAK LOAD OF MANOVER HEAT

The possibility of equipping a shunting diesel locomotive with an inert-capacitive energy storage device is being considered, which will smooth the load on the power plant and thereby reduce its power and mass and dimensions. The relatively frequent change in the operating mode of a shunting locomotive determines the efficiency and feasibility of equipping it with an energy storage device. In addition to smoothing the load on the power plant, the drive will allow energy to be recovered during braking, thereby increasing the energy efficiency of the shunting diesel locomotive. The theoretical background for creating an inert-capacitive energy storage device, which is technically designed as a DC machine with a super flywheel, is presented. The use of flywheels on shunting diesel locomotives is justified by virtue of not rigid requirements for the total weight. Another advantage of the locomotive is the presence of an electromechanical transmission, which minimizes the development for it of the considered inert-capacitive drive

Накопитель энергии для транспортно-технологических машин

The possibility of equipping transport-technological machines with an inert-capacitive energy storage device is being considered, which will allow smoothing the load on the power plant and thereby reducing its power and mass and dimensions. The load of a number of transport-technological machines, such as excavators, bulldozers, shunting diesel locomotives, etc., is essentially uneven. The power of their power plant is determined by the peak load. Obviously, most of the time the power plant works in underloaded mode. The aim of the work is to develop a technical solution for compensation of peak loads of transport and technological machines. The research tasks are to build a mathematical model of an inert-capacitive energy storage. The relevance of this study is due to the fact that the use of energy storage will allow to smooth the load on the power plant and thereby reduce its power and mass and dimensions. The relatively frequent change in the mode of operation of transport and technological machines determines the efficiency and feasibility of equipping them with energy storage. In addition to smoothing the load on the power plant, the drive will allow energy to be recovered when braking, thereby increasing the energy efficiency of the machine. The main research methods in the framework of this work are the methods of mathematical modeling and analysis. The methods used allow to obtain a reliable description of the objects under study. The theoretical background for creating an inert-capacitive energy storage device, which is technically designed as a DC machine with a super flywheel, is presented. The use of flywheels on transport-technological machines is justified by virtue of not rigid requirements for the total weight. Another advantage of some transport-technological machines is the presence of an electromechanical transmission, which minimizes the development for them of the considered inert-capacitive drive.

Ground simulations of liquid-filled satellites

Because of earth gravity,liquid fuel tanks cannot be fixed on air-bearing tables to simulate satellite movements in space.This paper describes the use of fly wheels to simulate the sloshing liquid torques for ground simulations.A liquid sloshing model is used to compute the sloshing torques with fly wheels then designed to output the same torques in real time for satellite sloshing liquid simulations.Simulations show that the influences of sampling time,delay,and external moments are well simulated and that an equivalent treatment of the fly wheel dynamics equations can simplify the computations of the fly wheels'angular velocity and the gyro force analysis.

The W estern R iver S teamboat H eroine , 1832–1838, O klahoma, USA : propulsion machinery

This paper completes the description of the western river steamboat Heroine (1832–1838) (Crisman et al. 2013b; Crisman, 2014), with a detailed analysis of the steam propulsion machinery recovered. Heroine's place in the development of steam technology is analysed through historic sources and comparable finds, and the requirements of river navigation explored. Changes to the paddle flange and the short-lived use of flywheels are particularly noted. The many variations in the iron castings and evidence of makeshift repairs provide insight into the material, engineering and economic constraints faced by engine manufacturers and steamboat engineers in the second quarter of the 19th century.

Shape optimization of a flywheel

The article presents the problem of the use of flywheels as an energy storage. More specifically focused on the issue of the optimal shape for isotropic materials and shapes, for which you can analytically determine the internal stress. The optimality criterion takes into account parameters such as moment of inertia (stored energy) and energy density. Efforts were made to choose a compromise between these two conflicting values, and therefore have been used multi-criteria optimization methods.

Simulations of economical and technical feasibility of battery and flywheel hybrid energy storage systems in autonomous projects

This paper deals with the feasibility of a Renewable Energy Sources (RES)-based stand-alone system for electricity supply based on a Flywheel Energy Storage System (FESS) located on the Greek Island of Naxos. The innovative use of flywheels in parallel connection with electrochemical batteries, as an integrated storage device in the same power plant, was selected to be simulated as it is a necessary buffer covering the load of a typical house. The optimal configuration for the electromechanical connection between the electrochemical batteries and flywheels is also considered in this study. Operational characteristics of the new storage systems were estimated and used in the simulations, while the financial aspects of the projects finalized using hand-made calculations and the HOMER software was used only for the energy calculations. It was found that an off-grid project using advanced and totally “green” technologies is possible and comparable to more conventional RES-based systems, in terms of energy and economical feasibility. Finally, it can be concluded that systems with low price flywheels are equivalent to those with electrochemical batteries.

The use of flywheel asynchronized compensators in a power system

The main properties of asynchronized compensators, including those with a flywheel on the shaft, are considered. Areas of application of electrical-machine flywheel energy stores are suggested. It is shown that asynchronized compensators with a long-term/short-term power ratio of 100/200 MW and a power exchange time of 15 – 30 sec can be used in power systems as a second-mobilization power standby to improve the quality of frequency regulation.

Superconducting magnetic bearings for energy storage flywheels

We are investigating the use of flywheels for energy storage. Flywheel devices need to be of high efficiency and an important source of losses is the bearings. In addition, the requirement is for the devices to have long lifetimes with minimal or no maintenance. Conventional rolling element bearings can and have been used, but a noncontact bearing, such as a superconducting magnetic bearing, is expected to have a longer lifetime and lower losses. We have constructed a flywheel system. Designed to run in vacuum this incorporates a 40 kg flywheel supported on superconducting magnetic bearings. The production device will be a 5 kW device storing 5 kWh of retrievable energy at 50000 rpm. The Cambridge University system is being developed in parallel with a similar device supported on a conventional bearing. This will allow direct performance comparisons. Although superconducting bearings are increasingly well understood, of major importance are the cryogenics and special attention is being paid to methods of packaging and insulating the superconductors to cut down radiation losses. The work reported here is part of a three-year program of work supported by the EPSRC.

Use of Flywheels for Energy Storage

Abstract An effective energy storage system can be used in a variety of ways to improve the utility factor of electric generating plants while greatly reducing their requirement for fossil fuels. An optimum energy storage system would have the following characteristics: installed and operating costs are comparable to equipment which it replaces; design lifetime is 30–50 years; and the system is available over a size range of nearly one million to one without significant compromises in cost effectiveness. Thus such a system could have a large variety of on-site applications, from the smallest electric vehicle to the largest utility's diurnal peaking unit. The system must have size and operating characteristics that permit its being used at any desired location, whether urban, suburban, or rural. It must be capable of automatic remote control and freedom from maintenance. It must have negligible effect on local ecological conditions. It must be capable of being produced in the required quantity without crea...

Application of Power Transistor as a Slip Regulator to DC Shunt and Compound Motors

The use of flywheels in industrial drives economizes many processes to a great extent, and the effective utilization of a flywheel necessitates, in many cases, the artificial speed reduction of motor from zero to full load. This paper demonstrates how a power transistor can be used to achieve this objective in a case where a dc shunt or compound motor is used for the drive.

Flywheel load equalizer

The use of flywheels to equalize the loads on steam engines, punch presses, rolling mills and other machinery of this class has been known for years but its use in connection with electrical machinery for operating hoists, steel rolls, etc., is comparatively new.

Flywheel Load Equalizer

The use of flywheels to equalize the loads on steam engines, punch presses, rolling mills and other machinery of this class has been known for years but its use in connection with electrical machinery for operating hoists, steel rolls, etc., is comparatively new.