The experiment was again done by riding cycle with flywheel coupled from 10 m side and noted down the extra distance that is covered by the bicycle. Flywheel it may be noticed that if the frictional torque, f, is constant, then the angular acceleration of the system, 1, is also constant. The method of rotating the flywheel has been adopted from this development. We are familiar with a flywheel from the experiment last week, but this. When energy is extracted from the system, the flywheel s rotational speed is reduced as a consequence of the principle of conservation of energy. Some of the earliest flywheels date back to potters wheels and water wheels in mills. The flywheel consists of a weighty round discmassive wheel fixed with a strong axle projecting on either side. Flywheels resist changes in rotational speed by their moment of inertia. Moment of inertia is the property of the body by virtue of which it resists the change in the state of its angular motion about any axis. In the second part, you will determine the torsion constant of a rod from measurements of t, using a solid disk as a torsion mass.
One end of a cord is loosely looped around the peg and its other end carries the weighthanger. Pdf experiment u4 moment of inertia of flywheels mohdfuad. The values reveal a total gain in energy of about nearly 10 per cent. When energy is extracted from the system, the flywheels rotational speed is reduced as a consequence of the principle of conservation of energy. The radius of the axle of the flywheel can be measured with a caliper.
The moment of inertia of body is defined as the measure of objects resistance to the changes of its rotation. Flywheels eventually stop turning due to friction and air resistance, but if we mount them on very low friction bearings, theyll retain their energy for days at a time. An example of a flywheel is attached to the crankshaft in a car engine which. To study the properties of a compound pendulum, and to determine the acceleration due to gravity by the use of such a pendulum. The two ends of the shaft are mounted with bearings as shown in fig. With this assumption 1 may be measured experimentally. Measuring the moment of inertia of a flywheel 740 words. An iron axle, a heavy wheel, some ropes, a mass, stopwatch, meter scale, slide calipers. With 2 wheeler bike, cycles the free energy generator can be fitted on the sides of a 2 wheeler in such a way that as the vehicle moves the fan start rotating and produces fee energy. Flywheel, ask latest information, flywheel abstract,flywheel report,flywheel presentation pdf,doc,ppt,flywheel technology discussion,flywheel paper presentation. Experiment in this first part of this experiment, you will compute the moments of inertia of a disk and an annulus from measurements of the masses and dimensions. Repeat the procedure several times and obtain mean values for all quantities.
Moment of inertia of flywheel objective the objective of this experiment is to determine the relationship between the angular acceleration of flywheel and the torque producing the acceleration. And a weight of 1n was attached to the shaft of dimensions 1mm length and 36mm diameter. Add values for m, m1, m2 to the rotation spreadsheet. But when we determine g using a simple pendulum, the result is not very accurate because an ideal simple. The acceleration due to gravity is often determined by indirect methods for example, using a simple pendulum or a compound pendulum. The experiment is conducted by recording the time taken for the respective point of mass to being rotated by a fixed load until the. In order to achieve this goal we input a sinusoidal voltage signal to the motorflywheel system and then measured the rotational velocity.
Fly wheel, weight hanger, slotted weights, stop watch, metre scale. In this experiment a flywheel at rest with a mass m hanging in a gravitational field of. Flywheel experiment torque spacetime free 30day trial. The experiment is repeated by changing the value of n and m. Moment of inertia of flywheel experiment ignited minds. Experimental apparatus for the moment of inertia experiment. The overall study is done with various parameters of flywheel to obtain the maximum free energy out of the system. This experimental flywheel uses a frictionless superconducting bearing and spins inside a vacuum chamber to prevent air resistance from slowing it down. The axle is mounted on ball bearings on two fixed supports. Using a photogate to measure the period, we varied the pendulum mass for a fixed length, and varied the pendulum length for a fixed mass. Sworup kanta adhikari kig180707 abstract a lab experiment was conducted to determine the moment of inertia of a flywheel in different configurations. Flywheel energy storage system for microgrids power plant applications, 2015, canada, universite du quebec a chicoutimi, november 3 rd 2018. The amount of energy stored in a flywheel is proportional to the square of its rotational speed and its mass.
The wall at the back of the flywheel had lines spaced at intervals of 0. Modeling and analysis of a flywheel energy storage system. Make a note of the fact that this is the speed to which our final results correct balancing weights will apply. An example of a flywheel is attached to the crankshaft in a car. The flywheel is essentially a mechanical battery as it stores the energy and then discharges.
After fall of the mass, note the number of oscillation of flywheel n2 and corresponding time t2 till the flywheel stopped. Find out the arc lengths of the events ipo, ipc, epo, epc, tpo and tpc. Modeling and analysis of a flywheel energy storage system for voltage sag correction a thesis presented in partial fulfillment of the requirements for the degree of master of science with a major in electrical engineering in the college of graduate studies university of idaho by satish samineni december 2003 major professor. Sep 22, 2017 checking how inertia helps in working even after the load is removed kindly like the video and subscribe our channel for more mechanical engineering related videos for guidance. Mark the openings and closings of the inlet exhaust and transverse ports. Flywheel energy storage fes works by accelerating a rotor to a very high speed and maintaining the energy in the system as rotational energy. Dynamic balancing of rotating machinery experiment technical. Using a rope or thread and scale, find out the circumference of the flywheel. A flywheel with greater mass and dimensions will have bigger power storage. The principle of the flywheel is found in the neolithic spindle and the potters wheel, as well as circular sharpening stones in antiquity the mechanical flywheel, used to smooth out the delivery of power from a driving device to a driven machine and, essentially, to allow lifting water from far greater depths up to 200 metres 660 ft, was first employed by ibn bassal fl. In this experiment, the flywheel rotates freely about a horizontal axis.
If the moment of inertia of a body is i and the wheel is rotating around an axle. A fairly realistic analysis of the motion of a flywheel can be made, assuming only that the net frictional torque on a rotating flywheel is constant. Experimental and theoretical investigation of flywheel based energy storage in offgrid power plants using renewables article pdf available in journal of energy engineering 1421. The flywheel was set as shown with the axle of the flywheel straight or parallel. This experiment is an introduction to some basic concepts of rotational dynamics. This will allow you to obtain a measured i from t and h. The force that enables the flywheel to attain such velocities also produces energy to slow down the flywheel s motion. Results that you get using a lower speed can be later verified using higher speeds.
With all the hoohah around the developing nexus between tesla, solarcity and panasonic, the battery subsidies on offer in japan, plus necs buyout of the a123 systems grid energy storage unit from wanxiang, you could be forgiven. Flywheel mounted on axle and supported by bearing, pan, weights, and stop watch. Find the moment of inertia of the table with the iron ring. Wrap the string or thread axle of flywheel for allotted number of turns n14 or 6 or 8. With the mass m of the flywheel by itself measured as 0. To determine the friction torque due to the bearings, t f to determine, experimentally, the moment of inertia, i, for the flywheel. As m falls, its gravitational potential energy is transferred into translational kinetic energy of m, rotational kinetic energy of the flywheel and work done by friction. Repeat procedure from 25 at fixed n1 for different masses e. Nov 26, 2018 moment of inertia of flywheel experiment ignited minds.
Measure the diameter of the axle d and record the mass of the falling weight m. The force that enables the flywheel to attain such velocities also produces energy to slow down the flywheels motion. Aug 10, 2018 moment inertia of a flywheel lab report 1. A fairly realistic analysis of the motion of a flywheel can be made, assuming only that the net frictional torque on a. The moment of inertia apparatus materials 1 table clamp 1 weight hanger mass 50g 1 long metal rod 1 length of. In this experiment, the moment of inertia of flywheel is being studied by variating the point of mass of flywheel.
Note the distance of centre of gravity from the support. Measurement of youngs modulus by bending of beam method. You will place two cylindrical masses at four di erent radii, such that r r1 r2 in each case, on a metallic rod. In performing this experiment, you will develop understanding of. This arrangement is maintained at a distance h from ground level. Moment of inertia of a flywheel by falling weight method. Pdf experimental and theoretical investigation of flywheel. Different configurations included a base wheel b base wheel and outer ring c base wheel and inner disc and d all three together. The flywheel consists of a heavy circular discmassive wheel fitted with a strong axle projecting on either side.
A flywheel with axle mounted some height above floor level, slotted mass on hanger, a cord, a 2m rule and a stop watch. Measurement of moment of inertia of different bodies and proof of parallel axis theorem. The number of rotations n made by the flywheel during this interval is counted. A flywheel is a mechanical device specifically designed to efficiently store rotational energy kinetic energy. The radius of the axie of the flywheel can be measured with a caliper. By using formulae calculate the radius of gyration and moment of inertia. Development of a flywheel system for the determination of.
These measurements in turn give the moment of inertia i as 0. Experimental and theoretical investigation of flywheelbased energy storage in offgrid power plants using renewables article pdf available in journal of energy engineering 1421. According to wikipedia, a flywheel is a spinning mechanized machine utilized to stock and release rotational power flywheels are seen to possess an inertia, termed the moment of inertia which therefore resists alterations in rotational to their speeds, much like the mass inertia of an automotive system prevents its acceleration. Flywheel, ask latest information, flywheel abstract, flywheel report, flywheel presentation pdf,doc,ppt, flywheel technology discussion, flywheel paper presentation. A flywheel is a large disc with a certain mass and dimension depending on the purpose that rotates freely and stores kinetic energy. Theory considering a falling mass, net forcemgf accelerationa hence mamgma fmga provided that a is much greater than g. From the definition of moment of inertia i, 11 imiri i. An experimental pendulum is suspended successively about several axes at different points along its length and the period about each axis is observed. The way to change a flywheels stored energy without changing its mass is by increasing. Find the moment of inertia of the table with the iron disk. The pendulum abstract the goal of this experiment was to determine the effect of mass and length on the period of oscillation of a simple pendulum. Thus flywheel bicycles can help in reducing the overall pedaling power by 10 per cent used in overdrives. In this experiment a flywheel with diameter 300mm and thickness of 74mm was used.
503 598 776 1276 1326 278 1412 1189 1483 171 1211 275 1345 1448 105 14 555 719 541 715 292 1439 1064 1453 1499 673 828 208 438 107 138 1032 944 832