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Pv system 2 - Coursework Example

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Pv system 2

Semi conductors are used in photovoltaic cells to provide voltage as a result of light. The semiconductor absorbs the light thereby knocking electrons and letting them flow freely. This is a typical conversion of light to electricity at atomic level. The suns power originates from the fusion of Hydrogen. The proton-proton reaction produces deuterons, which is the nucleus of an isotope of Hydrogen 2 that contains one neutron and one proton as a result of the ejection of the positron and an uncharged neutron form the deuteron forms the nucleus of a deuterium which is a heavy Hydrogen (Hedegus and Luque 79). Deuteron and proton combines to form triton or Helium 3 which is an isotope of Helium. Helium 4 can also be formed through the combination of two Helium 3 to form two protons and Helium 4 or a combination of triton and deuteron that produces energy, neutron and Helium 4. The total energy yielded is 26.7MeV. This may be obtained through calculations based on the atomic mass energy of Helium 4 nucleus (Hedegus and Luque 79)
Part of the radiation is lost to the outer space through radiation as some is scattered by the atmospheric gases. Some of the heat that reaches the earth’s surface has an average intensity termed as solar isolation and ranges between 0.6to 1.0kW/m2. This is mostly absorbed by plants as humans also harness the solar energy to produce electricity (Hedegus and Luque 48).
In the production of electricity, the solar radiations are concentrated by PV cells into a silicon wafer. This is usually done through optical systems concentration may also be done through luminescence (Gratzel 6848). Solar thermal power is an option of generating electricity through solar energy. Solar power is concentrated in solar power towers and focused into a fluid that bares a fluid. The temperature increases and it turns turbines thereby producing electricity.
There are commercially available PV ...Show more

Summary

The power of the sun originates from Hydrogen fusion that results to Helium, gamma rays, energy and both neutrinos, deuterons and positrons. There are other mechanisms through which Hydrogen may be converted to…
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