Water
is the most basic necessity for life yet nearly one billion people in the world
lack access to it. In many developing countries, people walk many miles to
reach a source of water that is not necessarily potable. Not only is distance
and portability an issue, but the average water collecting container in Africa,
the jerry can, weighs over 40 pounds when full. This project proposes to take
on challenges associated with the accessibility and cleanliness of the water in developing
countries by designing and building a filtration system and sidecar that are
portable, durable, and cost-effective.
A centrifugal pump will be used to pull unsafe water out of one holding tank,
pass through a filtration system, and onward into a clean tank while the rider
pedals the bicycle. Both the holding tanks and the filtration system will be
incorporated into the design of the sidecar to provide an entire system that
is portable and can be easily retrofitted to most standard bicycles.
Given
that the design must target a demographic that includes some of the poorest
regions in the world, reliability is one of the primary factors incorporated
into the design. The functionality of the pump and filter system needs to
require as little maintenance as possible. The design must also be
user-friendly as the assumption will be made that users will have no experience
with any vehicle of this type. Once the design is optimized, materials within
the build will be considered to find the most cost-effective method of
manufacturing.
Introduction
The objective of providing pure drinking water throughout the world is one that has
been an ongoing process for the past decades. Although we fully support the
work done by charities such as The Water Project and Water.org, we believe that
it will be a very long time until the water can be provided as a clean source
located locally throughout all developing countries. Therefore, our motivation
was stemmed from the idea of quickly aiding those less fortunate areas, as well
as providing a backup should those regions run into contamination problems
within their local wells. In addition, our solution will exponentially reduce the
time taken to retrieve the water and allow time for more beneficial tasks to
be accomplished in their native area. With our model, we will be able to provide
a working solution that mends the problem until a permanent clean water well
can be produced within that community.
Problem Statement
Developing
countries around the world face debilitating challenges accessing safe and
clean drinking water. Alarming statistics lead to the idea to use a simple
mechanism of transportation that is common in these areas, such as the bicycle,
to help aid their water and sanitation struggles. The goal is to design a
bicycle attachment to purify and transport water from contaminated sources that
are active while the rider is pedaling. This attachment, though not a permanent
solution, would be a contribution to the improvement of their quality of life.
Construction of pedal-powered water purifier
Pedal
operated water purifier consists of the following components:
- Centrifugal pump
- Sprocket
- Bicycle
- Power transmitting unit (Chain drive from rear wheel hub to pump shaft)
- Inlet and outlet tubes of the centrifugal pump
- Bucket of water
- Filter
Centrifugal Pump
Pump
is a device used to raise, compress, or transfer fluids from one place to
another. When a fluid, be it hot or cold, has to be "moved" in the system, pumps are used. In other words, in a more technically appropriate manner,
a pump is a machine which has the function of increasing the total
(mechanical) the energy of a liquid; this means that the pump transfers energy to
the fluid that it receives from the driving motor. Centrifugal pumps are
typically used for large discharge through smaller heads.
Sprocket
Sprockets
are used in bicycles, motorcycles, cars, tracked vehicles, and other machinery
either to transmit rotary motion between two shafts where gears are unsuitable
or to impart linear motion to a track, tape, etc.
Crank Arm
Pedal
The bicycle pedal is the part of a bicycle that the rider pushes with their foot to
propel the bicycle. It provides the connection between the cyclist's foot or
shoe and the crank allowing the leg to turn the bottom bracket spindle and
propel the bicycle's wheels. Pedals usually consist of a spindle that threads
into the end of the crank and a body, on which the footrests or is attached,
that is free to rotate on bearings with respect to the spindle.
Chain Drive
The chain drive is a way of transmitting mechanical power from one place to another. It
is often used to convey power to the wheels of a vehicle, particularly bicycles
and motorcycles. It is also used in a wide variety of machines besides
vehicles.
Belt drive
Belts
are the cheapest utility for power transmission between shafts that may not be
axially aligned. Power transmission is achieved by specially designed belts and
pulleys. The demands on a belt-drive transmission system are large and this has
led to many variations on the theme. They run smoothly and with little noise,
and cushion motor and bearings against load changes, albeit with less strength
than gears or chains.
Pulley
A pulley is a wheel on an axle or shaft that is designed to support movement and
change of direction of a taut cable or belt along its circumference. Pulleys
are used in a variety of ways to lift loads, apply forces, and to transmit
power.
Water filter
A water filter removes impurities from water by means of a fine physical barrier,
a chemical process or a biological process.
![]() |
Pedal Operated Water Purifier |
Working
The
wheel of the bicycle is rotated with the help of a chain driver and driven rim of
the bicycle. The belt drive of the centrifugal pump is connected to the rim of
the bicycle, it also rotates when the rim of the bicycle is rotated with the help of the rotation system. The shaft of the centrifugal pump rpm is depended upon human effort. With the rotation of the great speed, the vacuum is created
in the centrifugal pump and this vacuum in this centrifugal pump suck the water
from the water tank and it passes through the filter clean water discharge
through an outlet with some amount of pressure.
Advantages
- Operated by pedal power and therefore can be used in areas where electricity is irregular or insufficient.
- Simplistic in design, operations, and handling.
Conclusion
After
completing the project, conclude that our project is simple in construction and
compact in size for use. The manufacturing of the machine is easy and the cost of the machine is less.
Pedal Operated Water Purifier | Engineering Project
Reviewed by Admin
on
23:43
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