solar air heater by sumit

•APPLICATION OF SOLAR AIR HEATING

•DESIGN FOR SOLAR AIR HEATING

•EFFACT OF ARTIFICIAL SURFACE ROUGHNESS

Sun Angles

4

Passive

• Direct Solar Gain– South facing large

windows– Floors, walls, ceiling

used to trap heat. The heat is released at night

5

Passive

• Indirect Solar Gain– Thermal storage

materials are placed between the interior habitable space and the sun

– Can use vents in wall to help circulate hot air through room

Solar Cooling System

C 200 0

Air inlet Evaporator

Turbine Compressor

Solar Collector

Condenser

10 kpa

Condenser

Cooling Capacity Qe = 5 kW

HR

other

FUTURE USE OF SOLAR AIR HEATING

USE OF SOLAR AIR HEATING IN

M.H.D(magneto hydro dynamics )

GAME CHANGING IDEA

•As its name implies, magneto hydro dynamics (MHD) is concerned with the flow of a conducting fluid in the presence of magnetic and electric field. •The fluid may be gas at elevated temperatures or liquid metals like sodium or potassium.• When an electric conductor moves across a magnetic field, a voltage is induced in it which produces an electric current.•In MHD generator, the solid conductors are replaced by a gaseous conductor, an ionized gas.

•we can get about 60% efficiency•we want to take that solar radiation and concentrate it•Concentrated solar power systems use various focusing optics, e.g., mirrors or lenses•We’re heating a channel that contains the gas that has material-like caesium that’s easy to ionise

EFFACT OF ARTIFICIAL SURFACEROUGHNESS

•Improvement in the performance of a solar air heater can be done by enhancing the heat transfer. •different artificial roughnesselements are used to enhance the heat transfer rate

energy for creating such turbulence has to comefrom the fan or blower and the excessive power is required to flow air through the duct. Therefore, it is desirable that the turbulence must be created only by artificial surface roughness