ppt-presentation of practical design and thermal analysis of thermosiphon solar water heating system

• Improving the ability of this renewable energy in Libya by meeting the energy requirements to heat the water of a public building (mosque’s water) for normal day usage.

• Libyan citizen awareness through this project to justify the need for the use of this type of systems that use the sun as an energy source.

• Design each part of the system.

• Fabricate each part of the system.

• Study each part of the system.

• analysis each part of the system.

The principle object of the passive solar water heating project is to:

Review basics of Solar Water Heating process

Area: 1.7 Million square kilometers

Population: 6.5 Million

Main resources: Oil and gas !

There are basically two types of water heating open circle systems:

Passive Systems. Active Systems.

COLLECTOR CONSTRUCTION COSTS 1400 LYD

COLLECTOR CONSTRUCTION COSTS 1400 LYD

TANK CONSTRUCTION COSTS 200 LYD

SUPPORT STAND CONSTRUCTION 200 LYD

TANK CONSTRUCTION COSTS 200 LYD

COLLECTOR CONSTRUCTION COSTS 1400 LYD

SUPPORT STAND CONSTRUCTION 200 LYD

TANK CONSTRUCTION COSTS 200 LYD

COLLECTOR CONSTRUCTION COSTS 1400 LYD

+ 1200 LYD CURREBTED DESGHNS

results on 15th April 2014

start stop

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21:36:00 03:36:00 09:36:00 15:36:00 21:36:00 03:36:00

Irra

dia

tio

n (

w/m

^2

)

14.3

20.6

15.8

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20

25

21:36:00 03:36:00 09:36:00 15:36:00 21:36:00 03:36:00

am

bie

nt

tem

pe

ratu

re (

C*)

Time

Instantaneous efficiency curve based on gross area and mean temperature of heat transfer

y = -7.9955x + 0.7291

R² = 0.9736

y = -6.2599x + 0.5662

R² = 0.9716

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0.000 0.010 0.020 0.030 0.040 0.050 0.060 0.070 0.080 0.090 0.100

ETA

[%]

GR

OSS A

REA

T*M

Instantaneous efficiency curve based on Absorber area and mean temperature of heat transfer

y = -8.5243x + 0.7689

y = -7.0138x + 0.6333

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0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10

TM*SAN-GAKK collector arrayes collector Linear (SAN-GAKK collector) Linear (arrayes collector)

1. Collector siting

2. Collector orientation

3. Collector tilt

4. Collector shading

RESULTS ON 11th May 2014 FROM 06:00 AM TO 06:00 AM NEXT DAY

1719.521

24

31

4751

6459

6467

6157 57

5248.8

3531

28 28 28 28 26 26 25

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6:00 AM 10:48 AM 3:36 PM 8:24 PM 1:12 AM 6:00 AM 10:48 AM

TEM

PER

ATU

RE (

*C )

TIME

Tt,in°C Tst,out°C Taux t,out °C

50 50 50 50 49 50 5154 54 54 54 55 56 56 54 53 51 51 50 50 50 50 50 50 50

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6:00 AM 10:48 AM 3:36 PM 8:24 PM 1:12 AM 6:00 AM 10:48 AM

TEM

PER

ATU

RE (

*C )

TIME

Tt,in°C Tst,out°C Taux t,out °C

17 1821

21.8 22.4 23.5 22 21 1917.5 17.3 16.9 16.9 16.9 16.9 16.9

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6:00 AM 10:48 AM 3:36 PM 8:24 PM 1:12 AM 6:00 AM 10:48 AM

TEM

PER

ATU

RE (

*C )

TIME

Tt,in°C Tst,out°C Taux t,out °C

14.1

31

45

66

73.877.2

79.976

72

64

48

30

20.2 20 18.5 17.415 13.7

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6:00 AM 10:48 AM 3:36 PM 8:24 PM 1:12 AM 6:00 AM 10:48 AM

TEM

PER

ATU

RE (

*C )

TIME

Tp,1 °C Tp,2 °C Tp,3 °C T(p-g) °C Ta °C Tg °C

RESULTS ON 11th May 2014 FROM 06:00 AM TO 06:00 AM NEXT DAY

14.114.8

26

37

5964.4

68 69 70 69

63

55.4

38.7

26

20 19.8 18.3 16.914.5 13.7

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6:00 AM 10:48 AM 3:36 PM 8:24 PM 1:12 AM 6:00 AM 10:48 AM

TEM

PER

ATU

RE (

*C )

TIME

Tp,1 °C Tp,2 °C Tp,3 °C T(p-g) °C Ta °C Tg °C

14.114.5

23

36

5659

6367.2

64

58

46.3

34.35

2420.2 19.7 18.2 16.2 14.2 14.2

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6:00 AM 10:48 AM 3:36 PM 8:24 PM 1:12 AM 6:00 AM 10:48 AM

TEM

PER

ATU

RE (

*C )

TIME

Tp,1 °C Tp,2 °C Tp,3 °C T(p-g) °C Ta °C Tg °C

14.114.5

21

29

5255

5961

60.1 59

48

37.4

2622

19 18.818.517.316.715.914.7 13 13 13.713.7

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6:00 AM 10:48 AM 3:36 PM 8:24 PM 1:12 AM 6:00 AM 10:48 AM

TEM

PER

ATU

RE (

*C )

TIME

Tp,1 °C Tp,2 °C Tp,3 °C T(p-g) °C Ta °C Tg °C

1520

26.832 32 32 33.3

24.220 18.3 17.2

14.5 14 14

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6:00 AM 10:48 AM 3:36 PM 8:24 PM 1:12 AM 6:00 AM 10:48 AM

TEM

PER

ATU

RE (

*C )

TIME

Tp,1 °C Tp,2 °C Tp,3 °C T(p-g) °C Ta °C Tg °C

15 16

17 19

24.5 26.828

24.822.5

19.7 19.5 18 16 14 14 14

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6:00 AM 10:48 AM 3:36 PM 8:24 PM 1:12 AM 6:00 AM 10:48 AM

TEM

PER

ATU

RE (

*C )

TIME

Tp,1 °C Tp,2 °C Tp,3 °C T(p-g) °C Ta °C Tg °C

0 0 0 0

1.2

3

1.1

2.3

6

0 0

7.58

3.054

0

2.52

5.33

0 0 0 0 0 0

0.81.2

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1

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6:0

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M

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M

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M

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M

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M

M,I

N (

KG

)

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M

E(W

)

TIME

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Qg (Aux,t) (KJ) 9881.32

Qg (s,t) (KJ) 10233.028

Q g, USER (KJ) 4855.492233

9881.3210233.028

4855.492233

QL (p-a) (KJ) 4475.880079

QL (Aux,t-a) (KJ) 4057.465484

QL (s,t-a) (KJ) 1539.757018

4475.880079

4057.465484

1539.757018

1.4761041341.599835841

2.1615700952.119713417

1.915165224

0

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1

1.5

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2.5

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TOP

LO

SS C

OEFFIC

IEN

T W

*M^

2*K

PLATE TEMPERATURE (C)

U Top

U Top Linear (U Top)

78.91252698

171.0544482

580.3556317

501.7080452

414.2471142

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Q P

LATE

TO

AIR

LO

SS (K

J)

PLATE TEMPERATURE (C)

0 0 0 0 1.2 3 1.1 2.3 6 0 0 7.58 3.054 0 2.5

0%

100% 100% 100%

66%

87%

100% 100% 100% 100% 100% 100% 100% 100% 100%

So

lar

fra

ctio

n (

%)

mass flow(Kg)

Tp(°C) Ta (°C) Tt,in (°C) Tst,out (°C) Taux t,out (°C) Q LOST (KJ) Q GAINED (KJ) SF

34.3 19.7 19.4 39.8 51.7 403 998.8 80%

From the practical of fabrication and analysis of thermosyphon solar water heating system, I

have learned that how to design the solar water heater for public buildings such as mosques

The prototype of thermosyphon SWHs was constructed using common workshop tools and

machines, that’s a good advantage of this work.

The results give us an idea about the collector’s performance and the collector’s ability to

produce thermal heat to heat the water of the solar storage tank.

Results indicate that the design of the thermosiphon solar water heating system was a success

and satisfactory.

Solar water heating utilizing thermosiphon is attractive, because it eliminates the need for a

circulating pump.We can extract the fact that in hot climates e.g. (Libya) where solar energy is available and

freezing is not a problem, utilizing the solar water heating system using flat plate collector is a

much better option to achieve our purposes, due to its simpler design, and easier installation.

Creation of pulsating flow to investigate its effect on the thermal performance of the collector.

Providing the means to measure solar radiation and wind speed and prefers to be in the same level brighten

solar collector during the test to Estimating the actual performance of thermosyphon solar water heating

system.

Conduct studies on the economic returns of the solar heater.

Reduction of heat losses from the system by using more advance thermal insulation of all components of the

system.

Further work could be contacted upon the aluminium net inserted inside the pipes. This can be accomplished

by folding the net in order to have two or three turns or even to a spiral shaped profile that could probably

contribute more heat to the working fluid. Also the application of metallic foams of different porosities.

halries@ymail.com

If any one have Queries / Questions

Please send to me at