Subject:- Renewable Energy Sources

Topic:- Solar Energy

Difficulty:- High

Solar Constant is defined as the energy received form the sun per unit time on a unit area of surface, perpendicular to the direction of propagation of the radiation at the earth's mean distance from the sun outside the atmosphere

• It is denoted by I on and the latest value of I on is $1395 W/M^2$
• World radiation center(WRC) has adapted a value of I on = $13671W/M^2$
• Based on the solar constant the total solar energy incident on the entire globe of earth could be calculated.