Diffusion of Technology
utilization and usage of the conventional energy resources which leads to
increasing concern of the greenhouse effect and polluting the environment are
forcing engineers and scientists to develop electricity from non-conventional
sources of energy. 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 we designed a methodology wherein gravitational energy is
further amplified in terms of its magnitude by using perpetual motion mechanism
and hence can be successfully transformed into usable electrical energy. The
basic concept of a gravity power generating mechanism is simple.
Since all the sources are limited and non-precise, this enables to shift the
attention towards gravity.
is a dream to meet all energy requirements of the world. But when we have a
light that gives free, clean energy at least the basic requirement of millions
of people will be fulfilled. The vast proportion of existing solutions for heat and
light in remote, off-grid, areas rely on bio-mass (carbon-based fuel sources).
Concerns over ecological impact aside, a reliance on burning biomass for
lighting (specifically oil) is expensive, keeping millions in fuel poverty, is
unhealthy (producing toxic fumes and poor quality light) and dangerous (fire).
Initial Brief for ‘Carbon-Free Kerosene Lamp’ that led directly on to ‘Gravity
Light’: The charity Solar Aid identified kerosene (known in the UK as paraffin)
as the predominant, bio-mass fuel source burned for lighting across developing
African nations. They also identified some obstacles to the adoption of
alternatives to kerosene that seemed to exist.
find an eco-friendly solution for domestic & street light electrification
applications using stored muscular energy in the gravitational potential
the usage of stored muscular energy.
significant amount of power for domestic application.
tested results and mathematically evaluated results are to be compared & if
necessary, the required modifications need to be incorporated.
a working prototype of the concept of electricity generation using
gravitational potential energy.
Concept for Mechanism of
A suitable mechanism for the working of the gravity light was to be
selected. After considering a number of designs and discarding a few we came up
with three major design concepts which can be used for generating electricity.
Following are the concepts: –
Spring Actuated Gravity Lamp
The weight is attached to a rope which is wound over a pulley whose center
consists of a spring which is normally unwound. The spring is fitted onto a
shaft through a slot in the shaft and is wound over the shaft. The winding of
the spring causes the spring to compress under tension and rotate the shaft
along with the winding action. This rotates the pulley and the weight ascends.
After a certain height an initial tension is given to the spring and the spring
starts unwinding slowly at a constant rate depending on the weight attached to
the rope end. The force of the unwinding force rotates the shaft and helps
control the descent rate of the weight. This shaft would be further connected
to a dynamo shaft which will provide us with the required electricity.
Counter Weight Type Gravity
This employs the use of counter weight principle for lowering the weight
and in turn maintains a control on the descent rate of the falling weight. If
the weight to be lifted is ‘x’ then the counterweight that must be added so
that the weight just stars to descend is ‘x+0.9’. The weight will be attached
to the rope of a pulley and this pulley will be mounted over a shaft which will
be connected to the dynamo shaft producing electricity.
Bicycle Wheel Type Gravity
Light This concept is the most practical one out of the
three and it involves a rim of a bicycle wheel from which a shaft protrudes
supported by bearings and has a sprocket onto which a chain of required pitch
and length is mounted. The weight is mounted on one side of the chain and this
is suspended over the sprocket and lifted by mechanical means to a certain
height. The sprocket is given an initial torque and due to the self-weight and
gravity the weight falls down at a controlled decent rate.
Design and Manufacturing
approach for designing the mount, mechanism for suspending the weight and was
kept as simple as possible.
For 1.5 RPM of sprocket
i.e. for every minute the weight descends down by
Therefore, for 15 minutes: 15*0.375=5.6 meters height