Solar Energy Incident On Earth

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Solar energy incident on earth.

This energy effectively falls on the cross sectional area of the planet. On a perfectly clear or cloudless day when the sun is directly overhead or at the zenith solar irradiation is still reduced due to absorption 16 and reflection 6 by particles in earth s atmosphere. How to calculate incident solar energy on earth in a given day with a spectral filter. Solar energy is harvested by capturing light for direct photovoltaic conversion into electricity or as thermal energy heat water heating space heating and other uses.

The solar constant is the average extraterrestrial insolation at the edge of the atmosphere. At the earth s surface the energy density is reduced to approximately 1 000 w m2 for a surface perpendicular to the sun s rays at sea level on a clear day 1. Solar energy is incident on the top of earth s atmosphere at the rate of about 1 364 watts on every square meter w m 2. Energy that is absorbed by the earth is not the same as the energy incident on the earth s surface.

Viewed 11k times 1. The earth presents a disc of area nr 2 to the sun therefore the total amount of extraterrestrial insolation incident on the earth is i sc nr 2. 0 begingroup the daily. Of the 340 w m of solar radiation received by the earth an average of 77 w m is reflected back to space by clouds and the atmosphere and 23 w m is reflected by the surface albedo leaving 240 w m of solar energy input to the earth s energy budget.

Solar energy radiation from the sun capable of producing heat causing chemical reactions or generating electricity. Rough estimates of the solar energy available at the earth s surface. From this fact calculate the total rate at which solar energy arrives at earths. The solar constant is a conventional measure of mean tsi at a distance of one astronomical unit au.

This energy effectively falls on the cross sectional area of the planet. This gives the earth a mean net albedo specifically its bond albedo of 0 306. The total amount of solar energy incident on earth is vastly in excess of the world s energy requirements and could satisfy all future energy needs if suitably harnessed. Ask question asked 7 years 3 months ago.

The earth s radius is 6 37 10 6 m. From this fact calculate the total rate at which solar energy arrives at earths. Direct normal irradiance dni or beam.