Welcome to

Our Presentation

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University of Asia PacificDepartment of Electrical and Electronic Engineering

Our Project/Thesison

Water Purification by Solar Energy

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Presented by

Md.Rasheduzzaman Rasel 09108089

Shariful Islam 09108100

Md.Ekhlesur Rahman 09108103

Abul Hasan Emu 09108127

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Supervised by

Naim I. Alamgir

Department of EEE

University of Asia Pacific

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Introduction

The aim of our project is to purify water by using solar energy in rural areas of Bangladesh. And to purify the water we have used two methods, they are UV and RO process. We are using solar energy because in rural areas the amount of electricity is not sufficient. Sun ray is available in our country and by using this sun ray, we will produce electricity.

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Necessity of water purification

Pure drinking water is essential for human life. According to WHO, 97% population of Bangladesh have the access of water. Water born diseases, such as typhoid, cholera, diarrhea. 2.5 to 15 million children and old people are affected by diarrhea.

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Block Diagram of our project

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Solar Panel

ChargeController

Battery Inverter

UVlamp

RODirtyTank

Pure WaterTank

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Miseries period

Process of water purification

We used two types of process in our project.Reverse Osmosis (RO).Ultra Violet (UV).

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Reverse Osmosis(RO)

What is Reverse Osmosis ?

Reverse Osmosis is a technology that is used to remove a large majority of contaminants from water by pushing the water under pressure through a semi-permeable membrane.

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What types of elements are removed by RO

More than 99% of dissolved salts(ions). Dust Particles . Colloids . Organics. Bacteria. Pyrogens. And many more.

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Ultra Violet (UV)

Ultraviolet, light is an invisible form of electromagnetic radiation that has a shorter wavelength than the light humans can see. It carries more energy than visible light and can sometimes break bonds between atoms and molecules, altering the chemistry of materials exposed to it. UV light can also cause some substances to emit visible light, a phenomenon known as fluorescence.

Electrical characteristic of UV lamp

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For 110(v) For 200(v)

V=115 v V=200 v

I=42.6 mA I=48.53 mA P=3.1 w P=5.7 w

Power factor=0.63 Power factor=0.57

P=3.83 VAR P=7.74. VAR

P=4.87 VA P=9.87 VA

UV germicidal protects

BacteriaYeastMold SporesAlgaeE. Coli

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Why do we use solar panels?

Reduce the use of fossile fuel.

Easy Installation process

Easy to carry. Reduce environment

pollution.

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Charge controller

A charge controller, charge regulator or battery regulator limits the rate at which electric current is added to or drawn from electric batteries.

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Why do we use charge controller

Since the brighter the sunlight, the more voltage the solar cells produce, the excessive voltage could damage the batteries.

There are two types of charge controllers.

1. Pulse width modulation(PWM)

2.Maximum power point tracking(MPPT)

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What is Battery? A battery can change

chemical energy to electricity by putting certain chemicals in contact with each other in a specific way.

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Classification of battery

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What is Inverter?

A power inverter is a device that converts DC power (also known as direct current), to standard AC power (alternating current).

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Type of inverter

Basically there are three types of inverters

1) Square wave Inverters

2) Quasi Square wave or Modified Square wave Inverters

3) True/Pure Sine wave Inverters

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Equipments of the inverter

Since we will purify water using solar energy so we have to produce electricity from sun ray through solar panel. But to collect the electricity we need a inverter .So we have made a 10W square wave inverter . To make inverter we had to collect some equipments likes IC ,Transistor ,Resister , Capacitor, wire PCB Board ,UV lamp, Transformer etc.

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IC CD 4047

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Pin configuration of CD-4047

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IC LM358

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Pin Configuration of LM 358

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Transistor TIP 31

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Circuit Diagram of an Inverter

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Inverter

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Output of waveform an inverter

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Value of inverter(input & output)

Input voltage : 12 VInput current: 3.22 mA

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Output voltage: 173 VOutput current: 46.54 mA

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Questions & Answer Session

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