UWE Bristol Engineering showcase 2015

Bader Altamimi
BEng (Hons) Mechanical Engineering
Project Supervisor
Dr Mokhtar Nibouche
Harvesting The Mechanical Energy Of Exercise Machines
Gears specifications:
To double the speed at the output, a gear box designed
specifically for this purpose.
Serial No Pitch circle
Da
Number of
teeth
Module Pressure
Angle
Gear 1 128 32 4 20
Gear 2 96 24 4 20
Gear 3 96 24 4 20
Gear 4 204 36 4 20
Gear 5 204 36 4 20
Gear 6 96 24 4 20
Gear 7 96 24 4 20
Gear 8 64 16 4 20
Solid works Simulation On Gears
The results of the simulation shows the maximum stress
effect on the design and it’s lower than the yield stress ,
with a factor of safety 21.89.
Simulink
In order to evaluate the concept of person powered the power
generation using gym equipment like a treadmill, an investigation is
required to determine the feasibility of the project. The figures shows
the efficient of the output power depending on different operation
speed.
Project summary
This project is about using one type of renewable energy sources to
produce electrical energy. Energy produced from the movement of
persons over a treadmill machine which is a mechanical energy and
was converted into an electrical energy by using a generator. The
generated electrical energy was then used to power other
electrical systems within the sport clubs.
Project Objectives
The aims of this project is to investigate the validity of converting
the waste mechanical energy produces by trainer’s movement on
exercise machines in sport clubs into electrical energy through
using an electrical generator and then using this energy to run
other electrical devices. This can be achieved through
implementing the following objectives:
- Illustrate some of the human made energy sources like
mechanical energy from exercise machines.
- Take the Treadmill as a case study and measure the produced
energy from it.
- Perform a mathematical analysis for the energy convergence.
- Prepared a PDS to identify the treadmill specifications, material,
dimensions and components
- Develop a CAD model for the treadmill specially the mechanical
energy harvesting system.
- Discuss the obtained results to check its validity.
Project Conclusion
Mechanical energy from treadmill was successfully converted into
electricity using an electromagnetic dynamo generator along
coupled with the gear box that elevates the input rotational speed
of the treadmill shaft. The final electrical circuit delivering power to
a heavy duty battery was found to be 300 Watt at its peak.
Furthermore, analysis was done on different mechanical parts used
in the energy harvesting system and factor of safety of those
elements were found.
Some of the items which could be run with
this kind of electricity are:
Electronic Item
Noise Cancelling Headphones 0.1
Fluorescent Bulb 13
Laptop computer 50
Power needed to run from treadmill
(Watt)
Microwave oven 750 – 1100