Ce diaporama a bien été signalé.
Le téléchargement de votre SlideShare est en cours. ×

Vikash ppt

Prochain SlideShare
Shadw and eclpse
Shadw and eclpse
Chargement dans…3
×

Consultez-les par la suite

1 sur 9
1 sur 9

Plus De Contenu Connexe

Livres associés

Gratuit avec un essai de 30 jours de Scribd

Tout voir

Livres audio associés

Gratuit avec un essai de 30 jours de Scribd

Tout voir

Vikash ppt

  1. 1. ALBEDO & NET RADIATION VIKASH 191101039 BECHLOR OF SCIENCE IN AGRICULTURE 2ND YEAR TO DR. ROHIT KUMAR , FASE, SGT UNIVERSITY
  2. 2. CONTENT • Solar constant • Albedo • Eaeth’s albedo • Solar radiation • Net radiation • Net radiation example
  3. 3. SOLAR CONSTANT The solar constant is the amount of the incoming solar radiation per unit area, measured on the outer surface of Earth’s atmosphere, in a plane perpendicular to the rays. • Solar Constant for earth S= 1350 W/m2
  4. 4. ALBEDO • Albedo is a fraction of sunlight which is reflected off a planet. • When an object reflects most of the light that hits it, it looks bright and it has a high Albedo. • When an object absorbs most of the light that hits it, it looks dark. Dark objects have low Albedo.
  5. 5. EARTH’S ALBEDO • The average albedo of the earth is about 0.30. • That means that about a third of the solar energy that gets the Earth is reflected out to space and about two thirds is absorbed.
  6. 6. SOLAR RADIATIONS • Solar radiation, often called the solar resource or just sunlight, is a general term for the electromagnetic radiation emitted by the sun. Solar radiation can be captured and turned into useful forms of energy, such as heat and electricity, using a variety of technologies.
  7. 7. NET RADIATION The net radiation is the difference between the radiant energy absorbed and the radiant energy emitted.
  8. 8. NET RADIATION EXAMPLE • From atmosphere 300 W/m2 From surface 600 W/m2 From sun 80 W/m2 Net Radiation 380 W/m2 at surface

×