Date post: | 31-May-2015 |
Category: |
Engineering |
Upload: | sumit-soni |
View: | 293 times |
Download: | 6 times |
•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