This document describes a proposed design for a road power generator to power highway streetlights. The generator would harness kinetic energy from passing vehicles to power the lights. It consists of a movable plate that oscillates when hit by a car, transferring energy through a pulley system to a permanent magnet DC generator. The generated electricity would be stored in a battery for powering the streetlights. While a single car would generate around 3.47 watts, it is estimated the design could supply over 200 kWh per day for a major highway, helping reduce load on the national power grid. Further research is still needed to optimize the design and energy storage system.

1. University of Mines and
Technology, UMaT,
Tarkwa
Department of Electrical and
Electronic Engineering
DESIGN OF ROAD POWER GENERATOR TO POWER
L/O/G/O HIGHWAY STREETLIGHTS
Presented By Appoh Philip
Supervised By Mr. J. Annan

2. Mode Of
Presentation
11
Problem Definition
2 Project Objectives
3 Scope of Work
4
4 Methods Used
5
Main Work
6 Conclusion And Recommendation

3. Problem Definition
 The Energy demand in the country is at its peak, hence ways
of cutting down power consumption has become a necessity
leading to:
• Load shedding in many parts of our country
• Frequent power outages

4. Project Objectives
 Removing the streetlight loading components from
the national grid by:
• Proposing an alternative source of power for street
lighting

5. Scope of Work
 This project work is limited to the design of road power
generator to power highway streetlights.

6. Methods used
 The study of available relevant literature on
the topic.
 Consultation with the lecturers at the Electrical
and Electronics Engineering Department.
 Discussion among students.
 Autodesk Inventor

7. Main Work
 Overview of Literature
• Innowattech Piezoelectric Generators
• Electricity Generating Road Ribs
• E – Turbine on Highways
 Design of Road Power Generator

8. Overview of Literature
 Innowattech Piezoelectric Generators
Fig 1 Snapshots Representing The Pilot Stages

9. Overview of Literature
Cont ’ d
 Electricity Generating Road Ribs
Fig 2 Road Ribs

10. Overview of Literature
 E turbines on highways ’ d
Cont
Fig 3 E- Turbines On Highways

11. Design Of Road Power
Generator
The road power generator (RPG) is basically a renewable
energy supply system. The RPG consists of four main
components, with each component performing a unique task.
The four major components of the system are:
 Prime mover
 Pulley and Belt drive System
 Permanent Magnet DC Generator
 Battery Storage System

12. Prime Mover
Fig 4.Prime Mover

13. Road Power Generator
Fig 5. Road Power Generator

14. Pulley and Belt Drive System
Pulley
Permanent
DC magnet
generator
Vee- belt
Shaft
Output
terminal
wires
Fig 6.Pulley And Belt Drive System

15. Permanent Magnet DC
Generator
Output
terminal
wires
Casing
Shaft
Fig 7. Permanent Magnet DC Generator

16. Battery Storage System
Fig 8. Lead–acid Battery Storage System

17. Power Generated By One Car
 Assumptions
• Energy is transferred from the prime mover to the generator with no
losses.
Mechanical Energy = Electrical Energy
• The energy imparted does not attenuate with time and assumed to be
constant for a period of time and off at other times.

18. Power Generated By One Car Cont’d
 Parameters
• Average weight of car = 1500 kg
• Weight of movable plate = 2 kg
• Average speed of cars on Accra- Tema Highways = 100 km/hr.
• Oscillation time of movable plate = 10 s
• Distance covered by movable plate = 0.25 m
• Time taken for movable plates to accelerate = 300 s

19. Power Generated By One Car Cont’d
 The impact of a car on the movable plate is assumed to be an
inelastic collision thus,
Momentum of car = momentum of movable plate
1500×100 km/ hr. = velocity of movable plate × 2 kg
Velocity of movable plate = 75,000 km/hr.
= 20833.33 m/s
Acceleration of movable plate = (20833.33 – 0)/300
= 69.44 m/s2
Force of movable plate = mass × acceleration
= 2 × 69.44
= 138 N

20. Power Generated By One Car Cont’d
Energy of movable plate =F×d
= 138× 0.25
= 34.72 J
Power generated = Energy / time of oscillations of movable plate
= 34.72 / 10
= 3.47 W

21. Deductions from Generated Power
• For the Accra – Tema Motorway:
 45,000 cars pass daily (24 Hrs)
 380 lamps (100 W each rated at 24 V)
• KWHrs required:
 380 x 100 x 12 = 456 KWHrs
• KWHrs produced:
 3.47 x 45000 x 0.002777 x 500 = 217 KWHrs

22. CONCLUSION
The road power generator has the potential
to supply power to highway lights and even
store some of the energy for other purposes.

23.  A charge controller to prevent overcharging and overuse
of battery needs to be considered, especially because
the battery is the most expensive single part of the
system.
 Further research work needs to be carried to make this
project a reality.
 Alternative energy storage solutions must be found to
address the problems associated with Lead-acid
batteries.

24. THANK YOU