this presentation was regarding brief description of solar dryers and their types, and its applications in agriculture.

1. Hello!
I am knightfox

2. Solar Dryer
Device that use solar energy to dry substances

3. Solar energy availability on earth
 The surface receives about 34% of the total solar energy that
solar energy that reaches the earth.
 According to World Meteorological Organization earth surface
receives 120 Watts per sq. meter direct radiance.

4. Need of solar dryer
• Cost effective
• In rainy season and winters due to presence of moisture a foul smell develops
in food grains and there is full possibility of development of pests.
• It make us not to spreading food grains which was required earlier at regular
period of time.
• Drying in the direct sun has the risk of damaging the complete harvest by
rainfall.
• Dehydration of fruits, potatoes, onions and other vegetables

5. How drying can be done?

6. Types of
solar
dryer

7. Direct type

8. Indirect type

9. Active type

10. Passive type
http://www.avinsolar.com/wp-content/uploads/2015/03/dryer4.png

11. Mixed
mode
type

12. Hybrid
solar
dryer

13. Benefits of solar dryer
• Much less time is required for drying as compared to direct drying
because of black body.
• Protection of the drying products from insects but also from birds, dogs,
especially for drying meat and fish.
• The products is hygienic because microorganisms, insects and flies are
killed.
• Protection from rain.
• Protection from pollution by dust etc.
• Protection from the wind which can blow away the food.

14. Drawbacks of solar dryer
• Limited time
• Quality of products are not obtained in some cases.
• High initial cost
• Skilled person required

15. Application of solar dryer
Agricultural
crop drying
Food
processing
industries
Fish and
meat
drying
Dairy
industries
Textile
industries

16. Thanks!
!
Any questions?
You can find me at
kaushalgadariya@gmail.com