Solar Energy And The Atmosphere Ppt

Figure 2 16 on the average of all the solar energy that reaches earth s atmosphere annually about 30 percent 30 100 is reflected and scattered back to space giving earth and its atmosphere an albedo of 30 percent.

Solar energy and the atmosphere ppt. Total energy received from the sun per unit time on a surface of unit area kept perpendicular to the radiation in space just outside the earth s atmosphere when the earth is at its mean distance from the sun. It cannot be controlled by any one nation or industry if wecan improve the technology to harness the sun s enormous power wemaynever face energy shortages again. Solar energy is radiant light and heat from the sun that is harnessed using a range of ever evolving technologies such as solar heating photovoltaics solar thermal energy solar architecture molten salt power plants and artificial photosynthesis. Of the remaining solar energy about 19 percent is absorbed by the atmosphere and clouds and about 51 percent is absorbed.

Energy released from the sun is emitted as shortwave light and ultraviolet energy. Only about 7 of solar radiation is in the uv wavelengths. Solar constant isc solar constant isc. The highest energy ultraviolet does not reach the planet s surface at all.

Among the most common devices used to capture solar energy and convert it to thermal energy are flat plate collectors which are used for solar heating applications. Because the intensity of solar radiation at earth s surface is so low these collectors must be large in area. Solar energy has great potential for the future. It is an essential source of renewable energy and its technologies are broadly characterized as either passive solar or active solar depending.

The three types are. Burning of fossil fuels release a large amount of carbon dioxide gas which increases the temperature of the atmosphere and causes global warming green house effect. It does not pollute or otherwise damage the environment. Sources of energy ppt.

The second highest energy is also mostly stopped in the atmosphere. Even in sunny parts of the world s temperate regions for instance a collector must have a surface. The earth atmosphere energy balance is the balance between incoming energy from the sun and outgoing energy from the earth. Non conventional sources of energy are solar energy wind energy biomass energy ocean energy.

A standard value of solar constant is 1353 τ𝑊 𝑚2. Of the solar energy that reaches the outer atmosphere uv wavelengths have the greatest energy.