Solar desalination System and comparison with basic desalination Model

1. Department of Mechanical Engineering
Seminar on
SOLAR DESALINATION SYSTEM USING
HUMIDIFICATION AND DEHUMIDIFICION
& COMPARITION WITH CONVENTIONAL
MODEL
Presented by
NISHANTH G SHETTY
SHRIKANTH G KOTIAN
SUHAS A
VARUN N NAIK

2. CONTENTS
 Introduction
 Components
 Desalination process
 Testing data and Graph
 Conclusion

3. INTRODUCTION
 Water is available in abundance on earth.
 70% of earth is covered with water .

4. What is Desalination?
 Water desalination processes separate dissolved salts
and other minerals from water.
What is Humidification Process?
 The process in which the moisture is added to the air
without changing its dry bulb (DB) temperature is
called as humidification process.

5. What is Dehumidification Process?
 The process in which the moisture is removed from
the air keeping its dry bulb (DB) temperature constant
is called as the dehumidification process

6. DESALINATION SETUP

7. COMPONENTS
1. Solar air heater
Aluminum duct
Air blower
Reflectors
Solenoid valve

8. 2. Humidifier and Dehumidifier
 Water sprayer
 Pump
 Pipe line
 Saline water
storage tank

9. 3. Electronic Components
Solenoid valve
Thermocouple
Digital display

10. 4. Conventional model
Wooden box
Leakage proof
covering

11. DESALINATION MODEL

12. DESALINATION PROCESS

13.  Air heated to required temperature using air heater
 Hot air passed to Humidifying chamber
 saline water is sprayed over hot air to create humidity
 Humidity is condensed in Dehumidifier
 Distilled water is collected

14. Date
9 am
(0 C)
11 am
(0 C)
1 pm
(0 C)
3 pm
(0 C)
5 pm
(0 C)
Water
collected
(Lit/hr.)
10-02-17 44 56 72 68 57 0.8
15-02-17 43 55 71 67 56 0.7
20-02-17 45 57 73 69 58 0.9
25-02-17 46 58 74 70 59 0.9
05-03-17 40 52 68 64 53 0.7
10-03-17 48 60 76 72 61 1.0
15-03-17 49 61 77 73 62 0.9
20-03-17 47 59 75 71 61 1.1
25-03-17 48 60 76 72 60 1.2
05-04-17 51 63 79 75 63 0.8
10-04-17 50 62 78 72 61 1.2
15-04-17 49 61 77 73 62 1.0
20-04-17 52 64 80 76 63 1.3
25-04-17 51 63 79 75 62 1.2
Conventional model readings:

15. Date
9 am
(0 C)
11 am
(0 C)
1 pm
(0 C)
3 pm
(0 C)
5 pm
(0 C)
Water
collected
(Lit/hr.)
10-02-17 43 59 82 76 61 1.1
15-02-17 40 53 75 69 53 0.5
20-02-17 42 57 79 72 60 1.0
25-02-17 43 62 83 79 65 1.2
05-03-17 37 49 75 69 55 0.45
10-03-17 45 57 82 79 60 1.1
15-03-17 47 62 84 81 70 1.25
20-03-17 44 57 82 79 63 1.15
25-03-17 43 56 79 75 57 1.0
05-04-17 49 65 85 80 68 0.95
10-04-17 48 65 86 81 69 1.35
15-04-17 47 57 83 79 65 0.85
20-04-17 47 65 89 81 71 1.45
25-04-17 48 63 88 81 75 1.35
HDH system readings:

16. Graphical Representations
Testing date: 25-FEB-17
0
10
20
30
40
50
60
70
80
90
9:00
AM
11:00
AM
1:00
PM
3:00
PM
5:00
PM
Conventional model
readings (water temp)
Desalination system
readings (air temp)
WATER COLLECTED
Conventional model: 0.9 lit/hr.
Desalination model: 1.2 lit/hr.

17. Testing date: 15-MAR-17
0
10
20
30
40
50
60
70
80
90
9:00
AM
11:00
AM
1:00
PM
3:00
PM
5:00
PM
Conventional model
readings (water temp)
Desalination system
readings (air temp)
WATER COLLECTED
Conventional model: 0.9 lit/hr.
Desalination model: 1.25 lit/hr.

18. Cloudy weather
Testing date: 25-MAR-17
0
10
20
30
40
50
60
70
80
90
9:00
AM
11:00
AM
1:00
PM
3:00
PM
5:00
PM
Conventional model
readings (water temp)
Desalination system
readings (air temp)
WATER COLLECTED
Conventional model: 1.2 lit/hr.
Desalination model: 1.0 lit/hr.

19. Date
Water collected in
Desalination model
Lit/hr.
Water collected in
Conventional model
lit/hr.
10-02-17 1.1 0.8
15-02-17 0.5 0.7
20-02-17 1.0 0.9
25-02-17 1.2 0.9
05-03-17 0.45 0.7
10-03-17 1.1 1.0
15-03-17 1.25 0.9
20-03-17 1.15 1.1
25-03-17 1.0 1.2
05-04-17 0.95 0.8
10-04-17 1.35 1.2
15-04-17 0.85 1.0
20-04-17 1.45 1.3
25-04-17 1.35 1.2
Desalination model v/s Conventional model

20. 0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
Desalination
model
Conventional
model
Graphical comparison of both the model

21. CONCLUSION
 It is one of the affordable, sustainable and cost
efficient means of producing fresh water
 Solar energy being a renewable energy source is one
of the eco friendly and will be the most sustainable
energy source in future
 Upgraded models can be more energy efficient

22. Thank You