The document summarizes a student project on water purification using solar energy. It introduces four students who are presenting their project on purifying water in rural Bangladesh using UV light and reverse osmosis powered by solar energy. It explains the need for the project due to lack of access to clean drinking water. It provides block diagrams of the system design, which uses solar panels to charge batteries and power an inverter, UV lamp, and reverse osmosis filter to purify water. The document also describes the various components used, including solar panels, charge controller, batteries, inverter, UV light, and reverse osmosis filter. It explains how each component works and its purpose in the overall system.

1. Welcome
to
Our
Presentation
1

2. University of Asia Pacific
Department of Electrical and Electronic Engineering
Our Project/Thesis
on
Water Purification by Solar Energy
2

3. Presented by
3
Md.Rasheduzzaman Rasel 09108089
Shariful Islam 09108100
Md.Ekhlesur Rahman 09108103
Abul Hasan Emu 09108127

4. Supervised by
4
Naim I. Alamgir
Department of EEE
University ofAsia Pacific

5. Introduction
5
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.

6. Necessity of water purification
6
➢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.

7. Block Diagram of our project
Solar
Panel
Charge
Controller
Battery Inverter
UV
lamp
RO
Dirty
Tank
Pure
Water
Tank
7

8. Miseries period
8

9. Process of water purification
9
➢We used two types of process in our project.
➢Reverse Osmosis (RO).
➢Ultra Violet (UV).

10. 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.
10

11. What types of elements are
removed by RO
➢ More than 99% of dissolved salts(ions).
➢ Dust Particles .
➢ Colloids .
➢ Organics.
➢ Bacteria.
➢ Pyrogens.
➢ And many more.
11

12. 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.
12

13. Electrical characteristic of UV
lamp
13
For 110(v) For 200(v)
V=115 v V=200 v
I=42.6 mA I=48.53 mA
P=3.1 w
Power factor=0.63
P=5.7 w
Power factor=0.57
P=3.83 VAR P=7.74. VAR
P=4.87 VA P=9.87 VA

14. UV germicidal protects
14
➢Bacteria
➢Yeast
➢Mold
Spores
➢Algae
➢E. Coli

15. Why do we use solar panels?
➢Reduce the use of
fossile fuel.
➢Easy Installation
process
➢Easy to carry.
➢Reduce environment
pollution.
15

16. 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.
16

17. Why do we use charge controller
17
➢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)

18. What is Battery?
A battery can change
chemical energy to
electricity by putting
certain chemicals in
contact with each
other in a specific
way.
18

19. Classification of battery
19

20. What is Inverter?
A power inverter is a
device that converts
DC power (also
known as direct
current), to standard
AC power (alternating
current).
20

21. Type of inverter
21
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

22. Equipments of the inverter
22
➢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.

23. IC CD 4047
23

24. Pin configuration of CD-4047
24

25. IC LM358
25

26. Pin Configuration of LM 358
26

27. Transistor TIP 31
27

28. Circuit Diagram of an Inverter
28

29. Inverter
29

30. Output of waveform an inverter
30

31. Value of inverter(input & output)
31
Input voltage : 12 V
Input current: 3.22
mA
Output voltage: 173 V
Output current: 46.54
mA

32. Questions & Answer
Session
32

33. 33

34. 34