PEDAL BASED POWER GENERATION

& FLOUR MILL

MADE BY :-------PUSHPENDRA SINGH

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AIM OF THE PROJECT• Producing our own electricity by pedaling an

exercise cycle.

• Saves energy which is used for charging the batteries in conventional inverter system.

• Reduction in electricity bill.

• stationary pedal powered flour mill

• Provides a method for physical exercise besides serving its main purpose.

BLOCK LAYOUT

PEDAL POWERED

BATTERY CHARGER

INTRODUCTION The present design relates to very compact and

easily portable power-generating unit, which besides being used as a power generator.

The power-generating unit is pedal operated. As per the suitability of individual user the height

of the present design can be adjusted. The design enables hands free operation and simultaneously the user can engage himself in other activities like reading, watching TV etc. The user can relax intermittently without stopping the motion of the rotor unit abruptly.

COMPONENTS(POWER GENERATION)

DC Motor (capable of producing enough V to charge battery) Rubber Belt (capable of being fixed to rotor) Old Bicycle Rim Nails Scrap Wood NiMH Battery (4.8 V, 150 mAh) Copper Wire Diode Resistor (120 Ohm) Lengths of wire Alligator clips

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Alternator

Battery

Inverter Circuit

Pedaling 230v ac

BLOCK DIAGRAM

Voltage Level

Indicator

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Our Design(BATTERY CHARGER)

The whole system comprises of:

• An automobile alternator (12V ,35A ) which when pedaled gives dc output which can be used to charge the battery.

• An inverter circuit draws 12v dc from the battery and converts it into 230V ac.

• A battery level indicator is incorporated to avoid overcharging of the battery.

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• Consists of a gear mechanism coupled to an exercise cycle which helps to run the alternator at around 3500rpm with least effort.

• The alternator can charge the Batteries by supplying 10Amp current and 12V continuously.

• Thus the battery can be fully charged in about 3.5hours of pedaling

BLOCK LAYOUT

RECTIFIER UNIT

WORKING CONCEPT The force applied to the pedals gets transmitted to

the rotor unit of power generating device (D.C MOTOR) through chain-sprocket and gear train. The sizes of sprockets and gears are so chosen to achieve suitable rotating speed of the rotor for power generation.

The shape and size of rotor is chosen to act as a flywheel and impart suitable moment of inertia. The electrical power so produced can be fed to a rectifier unit and plurality of electrical connectors in the rectifier unit provides electrical power to various electrical devices.

A DC motor is generally used in applications that require accurate speed control. The motor is connected to a power supply which provides electrical current to the windings (coils) in the rotor. When a current is passed through windings, a magnetic field is produced. This magnetic field causes the rotor to spin therefore creating useful mechanical work.

These windings may also be used to induce a voltage if the reverse action is taken (rotor is manually spun and the DC motor acts as a generator).

This can be explained by Faraday’s Law of Induction which in short states that a voltage is induced by a changing magnetic field. The presence of the magnetic fields makes it possible to produce an electric current and generate power.

RURAL USE For schools (especially boarding schools), meetings, NGO and movement offices, there will be

many people who can easily share the pedaling at night. Put each CFL in a different room or region and people can take turns pedaling. The lights will be ON only when you pedal.

Put one 11 W CFL in each house and connect all of them in parallel to the pedal generator. At night each family or household can take 30 minutes or 45 minutes turns pedaling, lighting all houses as they pedal. If 3 houses are sharing a generator then 3 x 45 Minutes = 2 Hours, 15 Minutes lights for everyone, say from 7-9:15 PM.

URBAN USE If the usage is solely as an exercise cycle and

to demonstrate the principle of alternate energy in urban schools, then instead of the more expensive CFLs you can connect in parallel a few (say 3-4), 12 V, 20-30 W bulbs (that you can get from any auto shop for a few rupees each).

The ammeter indicates the current you are supplying or the rate at which calories are being burnt. You can also connect some CFLs in parallel with the auto bulbs if you wish.

4C: OTHER USES OF PEDAL GENERATOR You can run any 12 V device such as mike

system, radio, tape recorder, laptop through 12 V adapter and TV (of 12 V).

If you want to run lower voltage equipment (such as 6 V radio) then use your hands to turn the pedals and do not use the 12 V battery.

To charge lower voltage batteries, use your hand and turn the pedals slowly.

PEDAL POWERED

HAND-FLOUR MILL

INTRODUCTION A simple rule is that most people engaged in

delivering power continuously for an hour or will be more efficient when pedaling rate is in the range of 50-70 rpm.(Wilson D.G. VITA volunteer).

Keeping these limitations of human capabilities in mind the proposed machine consists of three sub systems: (1) The energy unit, (2) Transmission mechanism (3) The process unit.

INTRODUCTION The energy unit basically consists of

conventional bicycle mechanism; the transmission mechanism consists of chain drive running over a pair of sprockets and belt drive running over pulley and stone wheels.

The process unit is a pair of stone wheels mounted over one another where the wheat gets crushed into powered form to produce wheat flour. All these units are assembled on bicycle like structure(seat, saddle, handle etc).

COMPONENT(FLOUR MILL)

Bicycle chain -one and a half

V-belting Cardboard Mortar (16kgs sand and 8kgs cement) Rim tape (rubber strip or tape) Cotter pins (6) The Chain Assembles Flywheel Chassis OF STEELHand Mill

OUR DESIGN(HAND FLOUR MILL)

Drive unit: This is first stage of transmission. The

transmission of power from human to processing unit is carried out in two stages namely chain drive and belt drive. The operators uses his feet & legs to rotate pedal around the crank axel.

1-Front Chain Sprocket , 2-Pedal ,3-Chain ,4-Rear chain sprocket 5-Bearings for belt drive shaft , 7-CrossV Belt, 8-Stonewheels

OUR DESIGN(HAND FLOUR MILL)

Processing Unit:-

In second stage this power is transmitted to stone wheels from pulley with the help of cross belt drive.

Process unit is the one where actual crushing of wheat kernels take place. This process unit basically consists of stone wheel, hopper &the hemispherical collector.

BLOCK LAYOUT

Figure…..Energy unit, Transmission unit, Process unit

WORKING CONCEPT In conventional stone wheel mechanism the intermittent flow is required to get fine output. The same type of arrangements of flow is made in Pedal operated flour mill. It consists of Hopper mechanism in which the grains are

stored. It is having a flow control unit, which is connected by means of mechanical spring to the left hand brakes.

By breaking, the flow may control. The output of the

stone wheel mechanism is collected between a hemispherical collector which is located below the stone wheel mechanism.

RURAL & URBAN USE The main objective behind development of pedal

operated flour mill was on producing cheap, easy to operate system which can be easily fabricated by readily available material and

thus we proposed a simplistic design that can deliver efficient, productive and reliable flour mill which can be used in rural as well as urban areas.

This equipment can be easily operated by semi rather low skilled operator. Further this equipment can easily find its place where there is no or limited power supply.

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ATTRACTIONS OF OUR PROJECT

• Can be used in rural areas where electricity is out of

reach

• Any time charging, even during power failure

• Power Saving

• Reduces electricity bill

• Modified versions can be used for running house hold

applications like television and other appliances.

• Low cost

•  Simple in construction

• Easily operated HAND FLOUR-MILL.

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CONCLUSIONThe above proposed project named “THE PEDAL POWERED

GENERATION ” & “THE PEDAL POWERED FLOUR

MILL” has been designed and materialized on the objective of

providing an alternative source of electricity as well as an

effective mode of FLOUR MILLING. We believe that this

project, if effectively used may be considered as an innovative

and a good solution for the energy crisis as far as a developing

nation like India is concerned.