About our project

1. DESIGNAND FABRICATION PROJECT (19ME701)
SRAC OF THERMAL
COLLECTOR SOLAR
DRYER
Submitted by
212220080017 - K.MUNICHARAN.
212220083031- R.PREAM KUMAR.
212220083006 - D.CHARANTEJA.
Guided by
Mr.R.PrakashME, MBA, (PHD)
ASSISTANT PROFESSOR,
MECHANCAL ENGINEERING,
SAVEETHA ENGINEERING COLLEGE.

2. OVERVIEW OF THE PRESENTATION
 ABSTRACT
 INTRODUCTION
 HISTORY OF SOLAR AIR HEATER
 DESIGN, DESCRIPTION AND COMPONENTS OF SOLAR AIR HEATER
 PROCESS OF THE DESIGN
 PERFORMANCE CALCULATION OF SAH
 DESIGN PARAMETERS.
 CONCLUSION

3. ABSTRACT
 An improvised SARC of thermal collector solar dryer was designed and
constructed using locally available and recyclable materials. This step array
rectangular cans of thermal collector by which our aim is to reduce post-
harvest loses, drying time and to increase drier efficiency. This dryer is
designed in such a way that it can absorb maximum solar radiation and convert
it into useful energy, that will rise the drying rate, drying time, colour quality.
This improvised model is totally works by natural convection. There are other
trough collectors, flat plate collector and different type of collectors available.
But our improvised model is different from any of the existing designs, models
in a unique way. Our design is totally modified that it equips maximum amount
of solar energy, additionally we have improvised cylindrical array of aluminium
cans, energy storage material which will conduct the heat that has obtained by
solar energy, also by coating the inner surface by black. By these modifications
our dryer gives maximum efficiency. Our project is designed in a feasible way it
costs 7892/-Rs for us. Our results are estimatedly high compared to
conventional and sun drying.

4. INTRODUCTION
• WHAT IS SOLAR AIR HEATER ?
 Solar air heating is a solar thermal technology in which the energy from the
sun is captured by an absorbing medium and used to heat air.
• HOW DO SOLAR AIR HEATER WORKS ?
 The solar air heaters works by drawing in fresh outside air and circulating
through a maze of black aluminium that has a special selective coating that
absorbs much more heat than it emits.

5. LITERATURE REVIEW
S/NO PAPER NAME AUTHOR NAME FINDINGS
1. Solar Dryers For Food
Applications: Concepts,
Design, And Recent Advances.
Y.Mohana1R.Mohanapriya1T.
Anukiruthika1K.S.YohaJ.A.M
osesPhDC.Anandharamakris
hnanPhD
ELSEVIER PUBLICATIONS
Solar energy
From their results it is clear
information of absorber plate, uses
of absorber plate, classification, In
dryer absorber plate place major
role in contribution of achieving
desired drying rate, drying efficiency
and absorption of solar energy
2. A REVIEW ON NATURAL ENERGY
STORED MATERIALS USED IN
SOLAR DRYERS FOR FOOD
DRYING APPLICATIONS
Vishnuvardhan
ReddyMugiaPritamDasaRama
krishnaBalijepallibChandra
mohanVPa
MendeleyShare
ELSEVIER PUBLICATIONS
Energy storage
From the results it is concluded that
natural energy stored materials used
in solar dyers has drying time-saving
in the range of (9.52-47.2%) than
conventional dyers. The drying
efficiency and thermal efficiency of
the direct solar dryers with natural
energy storage are in the range of
(2.85-42%)

6. 3. RECENT DEVELOPMENTS
IN GREENHOUSE SOLAR
DRYING.
PushpendraSingh,VipinSh
rivastavaaAnilKumarbcELS
ElSEVIER PUBLICATIONS
Renewable and
Sustainable Energy
Reviews
From the results it is
conveyed that
greenhouse solar dryer
which has high colour
quality and taste and
nutritious value, when it
is included with thermal
energy storage materials
the efficiency of dryer is
increased.
4. PERFORMANCE OF
INDIRECT THROUGH PASS
NATURAL CONVECTIVE
SOLAR DRYER WITH
PHASE CHANGE THERMAL
ENERGY STORAGE.
DilipJain,PratibhaTewari
ELSEVIER PUBLICATIONS
Renewable Energy
From the results it is
informated that Thus,
the dyer is effectively
operated for the next 5-
6hours, the temperature
of the drying chamber
was observed 6 degrees
Celsius higher than the
ambient temperature
after sunshine hours till
midnight

7. HISTORY OF SOLAR AIR HEATER
 Solar heating systems have been in use for many years.
 Solar heat stored in iron was used in 1877 as reported by Daniels and Duffie.
The air blowing over the heated iron was then used to heat a home.
 The first SOLAR AIR HEATER was designed and produced by E.Morse (an
American) in 1881.
 Later this solar air heaters was investigated thoroughly and reported by many
others in 1963,1964,1976 and 1978.
 From different experiments today we see our regular solar air heaters.

8. DESIGN DESCRIPTION
 HIGHER THERMAL EFFICIENCY.
 Less complex design.
 FLEXIBILITY.
 Cheap in construction.
 AFFORDABLE.

9. COMPONENTS
 Glass plate.
 Wooden chamber.
 Soda cans.
 Absorber plate.
 Exhaust fan.

10. DESIGN

11. PROCESS OF DESIGN
 1. gather the tools and materials required to assemble the setup.
 2.Glue or nail the components together to form a structure that was
desired.
 3.part-1 cut the wood by saw by desired dimensions, drill the inlet holes
by hole saw.
 4.part-2 (glass) cut the glass by above mentioned dimensions.
 5.part-3 (side wooden closures) cut the wood by (400x800)mm in
rectangle shape, cut the inclination by making an angle of 23.356
degrees. which will give the solid pillar structure for the entire setup.
same as to be done for identical side of it.
 6.part-4 (soda can holder with honey comb structure) cut the wood of
(400x400)mm by square shape. mark the dimensions on the wood to drill
desired 16 holes. by using hole saw drill the 16 holes on the wood.
 7.part-5 (wall for drying cabinet) cut the wood by 50x40 mm in
rectangular shape by using circular saw. do the same for identical side of
the cabinet.
 8. Part-6 (OUTLET PASSAGE) Cut the wood by 50 x 50 mm in the shape of
square. Create an outlet passage by drilling a hole in the middle of wood
by using circular saw.
 9. Part-7 (CHARGING DOOR) cut the wood for charging door by (40x50mm
in the shape of rectangle.

12.  10. combine the PART-1 and PART-3 by using nails and hammer.
 11.Attach the PART-4 to the combine structure by using nails and
hammer.
 12.Place the PART-2 on the combine structure.
 13.Combine Part-5 with the combined structure by using nails and
hammer.
 14.Place the PART-6 and attach on the top of the PART5.
 15.Attach PART-7 to the combine structure by using nails and hammer.
 16. cross check the combine structure and continue the drying
process.

13. PERFORMANCE CALCULATION OF SRAC OF THERMAL COLLECTOR SOLAR
DRYER

15. TYPES OF AGRICULTURAL PRODUCT
DRIED IN THIS SOLAR AIR HEATER
 GRAINS
• PADDY,WHEAT etc..,
 VEGETABLES
• POTATO,TOMATOES,ONION,GINGER,CARROT etc..,
 FRUITS
• GRAPES,DATES etc..,

16. PARAMETERS VALUE OF THE PARAMETERS
Total size of batch (paddy) 3kg
Amount of moisture to be removed 0.313kg
Total drying time 8 days
Drying rate 6.520x10-3 kg/hr
Quantity of air needed for drying 0.6098kg.
Volume flow rate of air 15.94m3/hr
Wind speed 4.15m/s
Total energy required to remove
moisture
2.99MJ
Collector dimensions (1.3m by 0.5m)
Collector depth 0.4m

17. CONCLSION
 Solar energy which is a free gift from the nature.
 In solar air heater the rapid rate of drying proves its ability to dry food to
keep in safe moisture level in a hygienic environment.
 By using solar dryer, agricultural products will be dried under controlled
conditions of temperatures and humidity.
 Evaluation yet to be completed.
 Design and fabrication is completed