Solar energy provides abundant energy to Earth, with 120 trillion kWh intercepted hourly, meeting global energy demand every 20 minutes. There are two types of solar thermal technologies - passive systems without moving parts that use sunlight for heating, cooling, and lighting, and active systems that require components to transport and transform solar energy into heat and electricity. Solar air heating systems can be classified based on collector type as porous or non-porous, with applications including space heating, crop drying, process heating, and refrigeration.

1. SOLAR AIR HEATING SYSTEMS
-M.A.ARAVINDH
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CGET

2. Solar Energy - An abundant resource!
• 120,000,000,000,000,000 KWh of solar energy
are intercepted by the Earth every hour!
• This amounts to the annual world energy
demand every 20 minutes!

3. SOLAR THERMAL DEVICES
• The simplest and most direct application of
solar energy is the direct conversion of
sunlight into low-temperature heat (up to a
temperature of 212 degrees F).
• two classes of technologies - PASSIVE and
ACTIVE solar energy conversion.

4. PASSIVE
• Passive solar design refers
to the use of the sun’s
energy for the
heating, cooling and daylighting of living spaces.
• Passive systems are
simple, have few moving
parts, no mechanical
systems, and require
minimal maintenance.
ACTIVE
• active solar energy
technologies require the
transport of heat through a
medium and thus need
components to transform
and transfer the solar
energy.
• Energy from active solar
sources has two major
applications – HEAT and
ELECTRICITY

8. Classification based on collector
• Porous Type
– Matrix
– Honeycomb
– Jet plate
• Non Porous Type
– Overflow
– Underflow
– Double flow

10. Honey Comb
Wire Mesh

17. APPLICATIONS
•
•
•
•
SPACE HEATING.
CROP DRYING.
PROCESS HEATING.
REFRIGERATION etc.

18. THANK YOU..
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