SOLAR BOAT PROJECT

SOLAR BOAT PROJECT

ABSTRACT

THE IMPORTANT OF SOLAR ENERGY

Affordable

Inexhaustible

Reduce Pollution

AIM

To investigate the best shape of solar boat and the speed of the boat

SPECIFIC OBJECTIVE

Invent a Best Solar Boat Design

Increase The Efficiency

FACTOR EFFECTING THE MOVEMENT OF VEHICLE IN WATER

Force

Energy Supply

FORCE THAT ACTING IN MOVEMENT OF BOAT

Lift

Thrust

Weight

Drag

HOW TO INCREASE THE SPEED OF SOLAR BOAT?

Increase the Forward Thrust

Reduce The Drag Force

Balance the Weight And the Lift Force

HYPOTHESIS

Electrical energy produced by solar cells (combination of series and parallel connection ) can be used as a power supply for boat

HOW SOLAR CELLS WORKS

Solar-powered photovoltaic (PV) panels convert the sun's rays into electricity by exciting electrons in silicon cells using the photons of light from the sun.

As the photons of the sunlight beat down upon these cells, they knock theelectrons off the silicon.

The negatively-charged free electrons are preferentially attracted to one side of the silicon cell, which creates an electric voltage

AERODYNAMIC

The word comes from two Greek words:

Aerios = concerning the air

Dynamis = meaning powerful

Aerodynamics is the study of forces and the resulting motion of objects through the fluid ( air/ liquid)

Making a shape smoother and more sleek will improve the lift and drag performance of a shape.

Defined as "reducing a shape's resistance to the flow of fluid."

When the flow becomes turbulent and uneven, sometimes called "dirty flow," as in the top two examples, the resistance of the fluid flow against the object is high.

But by properly shaping the object to maintain a smooth, laminar flow, as in the bottom two cases, that resistance can be substantially reduced. These latter shapes are what we would call streamlined shapes.

STREAMLINING

HOW TO CHOOSE THE SHAPE OF PROPELLER

Diameter

Diameter means the total width of the circle at the blade tips as the propeller spins.

A larger diameter pushes more water and reaches deeper into the water.

So theyre typically used on large, heavy boats or ones with high engine mounting heights.

A smaller diameter is usually used on lighter weight boats.

Number of Blade

Two-bladed propellers are the most common, showing good overall performance, top speed, and efficiency for most applications.

Three and Four blades characteristically provide increased acceleration.

However, three and four blades typically mean more drag on the engine, resulting in lower top speeds.

Blade Surface Area

Blade surface area refers to the total surface of the blades.

The more blade surface area a prop has the more water it pushes, for better hole shot

Cavitations

Cavitations occurs when pressure on the water across the blades surface is reduced to the point of becoming water vapor, forming bubbles.

If these bubbles burst, they can cause a cavitation burn which can deteriorate the propellers surface and cause negative performance issues.

MATERIALS

Plastic Bottle

Compress foam board

Hot Glue Gun

Connecting Wires

Soldering Iron

Motor DC

Solar Cells

Poly Foam Cutter

VARIABLES

Manipulated Variable : The Shape Of Boat

Responding Variable : Speed Of The Boat

Fixed Variable : Arrangement Of Solar Cells and Type Of Solar Cells

Procedure

Combining And Sticking The Parts Of The Solar Boat Body Using The Hot Glue Gun

Procedure

Cut The Behind Of A Bottle And Then Preparing The Propeller

Procedure

Attaching The DC Motor With The Solar Boat Body

procedure

Attaching The Solar Cells To The Boat And Glue The Half Bottle In Front Of The Boat

procedure

Final decoration Of The Boat

ENERGY SUPPLY

Series and parallel combination of solar cell

SIZE OF THE SOLAR BOAT

Length : 32 cm

Wide: 11.5 cm

Height: 9.5 cm

Weight: 119 g

TRIAL SCHEDULE

DateTimeSpeedBrightness 27 July 201512.30 pm20 km/hDim ( hide by the cloud )28 July 201511.45 pm24 km/h28 July 20153.20 pm26 km/hVery bright

RESULT