Design a Hybrid Solar Bicycle

ME 401
Design a Hybrid Solar Bicycle

Presented By:
Mohannad Al-jandal 423102727
Mosin Al-enezi 423112829
Bandar Al-shamary 423101804
Meshari Al-enezi 422000523
Abdurrahman Al-enezi 421000896

The objective of this design

To convert the solar energy to the electrical energy by using solar cells, then Converting this electrical energy to mechanical energy by using dc motor to run the Bicycle beside the human paddling.

What is solar energy?
Solar power is electricity produced directly from sunlight. Solar thermal power refers to a process where the suns energy heats a working fluid that eventually is used to do work in an engine or a turbine. Solar photovoltaic power (PV) takes advantage of the photovoltaic effect so that when sunlight hits a PV panel, it releases electrons from special layers of silicon and pushes them across an electric field.
These electrons then travel through an external circuit to return to their initial state, and in the process create electric current.

Why solar energy?
- Adding a solar electric system in your home or business is an easy way to take advantage of regional incentives, invest in your home or businesses' value and protect the environment by using clean renewable energy.
Throughout the world, the combination of the price of electricity, available free sunshine, and incentives offered by local and state governments now position grid-connected photovoltaic (PV) as an attractive investment.
- Once considered to be too expensive, today's PV systems produce electricity that has a quantifiable cash value.

How does a solar cell work?

1-Solar Panels convert sunlight directly into electricity.
2-Inverter converts the solar electricity (DC) into household current (AC) that can be used to power loads in the house.
3--System Monitor is an easy-to-read digital meter that shows the homeowner the amount of electricity generated both cumulatively and daily.
4-Utility Meter tracks power usage and production, spinning forward when electricity is used from the grid, and spinning backwards, generating a credit, when the solar system creates more electricity than is used in the house.

Flashlight Beam Analogy

The more perpendicular a flashlight beam is to a wall,
the brighter the beam on the wall, and the less area the beam covers.

Area of ground receiving the ray on flat ground (B)
is larger than area on Sun-facing slope (A).
Thus more energy is received per unit area on the slope.

Advantages:

1- Completely zero-emission.
2- Silent.
3- Renewable.
4- No fuel is consumed therefore the power is "free".
5- Panels warranted for 20-25 years.
6- Extremely simple design with no moving parts
7- Excellent for remote cabins or homes.
8- Independent of utility price fluctuations

Disadvantages:

1- Initial purchase price is high.
2- Storage batteries will need to be replaced after about 3-5 years.

Facts about Solar energy:

A 1 kilowatt home solar system installed costs about 33000SR.
A 1 kilowatt system take 1 day to install.
A sunny location receives about 5.5 hours of sunlight on average throughout the year.
A cloudy location receives about 2.5 hours of sunlight on average throughout the year.

The main components of a solar home system are the solar panel, an inverter, a battery, wiring, and support structure.
A typical silicon cell Solar panel will have a life in excess of 20 years.
A solar energy system can provide electricity 24 hours a day.
Solar modules DO produce electricity on cloudy days.
A typical high power solar module generates 100 Watts and measures about 60 cm by 120 cm

What is SOLAR BIKE?

-These are bicycles to which an electric motor, battery, and a solar panel have been added to assist the human power provided by the rider.
-In competition, solar bikes derive about half of their energy from the rider and half from the electric system.
-Top bikes are averaged more than 40 km/hr.

Why We choose the TRICYLE?
- The idea of this project is to develop this type.
- To let it easer in use.
- more efficient and more comfortable.
- there are many components used in this design for that we will choose the TRICYCEL to overcome the suitable space.
- carrying more component and it help to hold this component safely

NEED ANALYSIS
- The bicycle is one of the important need in transport , some country use the bicycle as alternative of the cars
- There is a wide range of bicycle user, some use the bicycle for transportation, and some use it in racing or just for fun
- The human power is too weak comparing with machine power , and the rider could suffer from a fatigue so there is a need for an additional source of power to solve this problem

- There is a need for a green energy , one kind of this energy is the solar energy. Which is clean and easy to get , specially in our environment.

- Must people, on there drive to work, go less than 70 km the ring and speed of the solar bicycle is perfect for such task? It is cleaner and you never have to buy gas or change the oil.

: Methodology

Methodology

Specifications:
Tricycle wheels, 50.9cm diameter.
Solar panels, 12 volt, 87 W
Motor, dc motor, 12 volt, Maximum load current is 175 mA. Power rating is 1.4 W .
Battery, 12 volt, 70W
Charging time, 10 hr
Maximum speed , 15 km

How it works?
Solar panels transfer energy to 12 volt deep cell batteries located on the bike's frame just below the chair. From there, a small electric motor between the rear wheels powers the bike. The whole system is on a continuous feedback loop, enabling the bike to partially recharge while in use thus extending the bike's range. A simple gearbox located between the motor and the chain gear which gives you variable speed control.
The rider can switch from pedal power to solar power easily, and when not in use, the solar panels continue to recharge the batteries. The motor's maximum is 1/2-horsepower.

Tricycle
Advantages Disadvantages

Morphological analysis

Constrains and obstacles

The high price of solar panel

There is technical difficulty to install the gearbox in bicycle

The DC motor was hard to find and is expensive

We had to weld a steel bar to hold the solar panel and the dc motor

The time

The bicycle structure was not suitable to install the solar panel

Evaluation analysis
Note: 1= bad , 2-not bad ,3= good, 4= vetry good , 5=excellen

Calculation

Thank you