GRAVITY LIGHTING SYSTEM

SEMINAR ON

SUBMITTED BY:-RAJAT KASLIWAL(1502103001)Mtech(PIE)

SUBMITTED TO:-

Dr I.A PALANI

INTRODUCTION

In recent times due to effects of pollution and global warming there is a need for generating power from renewable sources. The reason for generating power using gravity is that it is available all over the Earth, abundant and consistent too. In this project, the gravitational energy of a heavy particle is converted to the electrical energy. When the heavy particle falls down from a higher altitude to a lower one,its potential energy is converted into the kinetic energy. Then this energy is converted to electricity by using a synchronous motor.

ABSTRACT Cont.…..

With the increasing of the altitude of the load, the lighting time increases. If load increases, power production also increases, but the lighting time decreases.

THE PROBLEM

20% OF THE WORLD'S POPULATION DO NOT HAVE ACCESS TO ELECTRICITY.THAT'S 1 IN 5 PEOPLE.

With a growing world population, this number is projected to remain the same for the next 20 years. Without electricity, most of these people have no other option but to use kerosene lamps to light their homes.

THE PROBLEM Con….

 A typical lamp is made by taking an empty bottle or tin can, putting a wick in the middle, filling it with fuel and lighting.

SOLUTION

Solution is GRAVITY LIGHT.GravityLight is a gravity-powered lamp

designed by the company Deciwatt for use in developing or thirdworld nations, as a replacement for kerosene lamps. It uses a bag filled with rocks or earth, attached to a cord, which slowly descends similar to the weight drive in a cuckoo clock. This action powers the light for up to thirty minutes

GRAVITY LIGHT

Gravity Light is powered by gravity without the need of a battery, it's also seen by its creators as a superior alternative to solar-powered lamps.

GRAVITY LIGHT

How it works…..???

Potential Energy:- GravityLight is installed to provide a 6ft/ 1.8m drop of a 12kg weight. This weight is lifted and on release starts falling very slowly (about 1mm / second).

Kinetic Energy:-This movement powers a drive sprocket, which rotates very slowly with high torque (force). A polymer geartrain running through the product turns this input into a high speed, low torque output that drives a DC generator at thousands of rotations per minute.

High speed ratio nearly of the order of thousands. N2/N1=n.1000(Approx) Where, N1=RPM of driving gear N2=RPM of driven gear, n=1,2……

How it works….???

The gearing took the kinetic energy from a weighted bag descending at a rate of a millimeter per second to power a dynamo spinning at 2000rpm.

Electricity and Light:- This generates just under a tenth of a watt, a deciwatt, to power an onboard LED and ancillary devices. Given the ever-increasing efficiency of LEDs, this produces a light over 5 times brighter (lux) than a typical open-wick kerosene lamp.Once the weighted bag reaches the floor, which depends on how high it was installed, it is simply lifted to repeat the process.

A typical gravity floor lamp

The electricity powers 10 LED bulbs for 4 hours

The spinning gear spins a generator

Downward motion converts into rotational motion

Attaching five 4.5 kilogram weights

LITERATURE SURVEY

Sir Issac Newton had discovered the phenomenon of gravity near 400 years ago. London researches Martin Riddiford and Jim Reeves who have spent four years for developing gravity light as an off line project. They are using tried and tested manufacture who has the right knowledge to make gravity light. Gravity light is a revolutionary new approach to storing energy and creating illumination. It takes only three seconds to lift the weight which powers gravity light, creating 30 minutes light on its descent.

EXPERIMENTAL ANALYSIS

Designed Gravity Light (SolidWorksDesign)

Fabricated gravity light

EXPERIMENTAL RESULTS

For 1kg of load from a height of 1.45m the input energy is 14.23 J and the output by the generator is 1.62J. Hence the efficiency of gravity powered light is 11.23%. Some observations are made from the gravity light are….Observa

tionWeight (Kg)

Height (feet)

Lighting Time(sec)

1 1 3.5

42

2 1 4 49 3 1

4.5 56

4 1 5 64 5 1

5.5 75Observations of lighting time for different

heights of 1 kg mass

Graph for lighting time (s) vs. height (feet)

RESULTS

Observations of Voltage and current for different masses from a fixed height (3.5 feet)

RESULTS

Graph for current (mA) vs. weight (kg) Graph for voltage (V) vs. weight (kg)

CONCLUSION

Generation of gravity power can be increased by applying much heavier load at the end of bicycle wheel.Though heavy load increases the voltage and current of synchronous motor but it decreases the lighting time of LED. Applying heavy load, it may cause bending to the pipe stand. So a suitable mass must be used to fall it as much long time as possible. If we use 2.5-3 rpm synchronous motor, the lighting time will increase.

In the remote areas, it may play a great important rule for the education as well as fulfilling the demand of the power. Moreover, the power can be stored in the battery so that it may give a great advantage to emergency situation.

THANK YOU