Alternate Way of Electricity Generation from Solar power

Project Abstract / Summary : This paper aims to bring out an alternative technique for electricity generation from solar energy. The main objective is to utilize most solar spectrum both IR and visible, rather than as in existing methods which solemnly depends on any one radiation of the spectrum i.e. visible in case of solar cells and IR in case of thermal plants, which promises to give out maximum utilization and yields comparatively high output. Here, the main process is to convert solar energy to heat energy to the maximum possible amount. Then to utilize the heat converting it to electrical energy by thermoelectric effect i.e. when there is a difference in temperature between two junctions of dissimilar material, electrons pass from one end to another creating electric potential. For conversion to heat to maximum, comes utilizing the enhanced greenhouse effect, wherein the greenhouse gases are put in at very high concentration inside a chamber which is of glass allowing the solar radiation in. This is primarily will be a product for domestic purpose satisfying the needs of every home individually. the efficiency is increased as the 90% of spectrum is converted rather than being only visible or IR as in existing method.
heat buildup by:
Most of solar radiation is between wavelengths of 0.1 and 3 μm. This range of wavelengths includes infrared radiation, visible light and ultraviolet light. Over 90% of the solar radiation reaching the Earth's atmosphere is visible light and near-infrared radiation, with a wavelength range of 0.7 and 1.5 μm. The amount of heat received by the surface is actually much larger which is three times than the amount the surface receives in solar radiation, due to the natural greenhouse effect. When electromagnetic rays reach the bottom of the setup, it heats up. It is known, any object above absolute temperature emits at a wavelength proportional to the fourth power of its temperature hence, emits a longer infrared radiation. This radiation is prevented to go out of the setup by the greenhouse gases. These gases are capable of absorbing these long wavelength radiations. Say,100 units of energy into earth, in which, 44 units reach the surface. But due to the greenhouse, repeated reflection cause 102 units to hit the surface.Molecules which could absorb can also emit at same wavelength and will radiate in all directions, approximately half back inside the setup. By the same time, solar energy is being poured into, along with the re-emitted heat radiation, increasing the net heat to increase, which means there is a net heat accumulated inside the setup. This is been taken as the hot junction while electricity is generated through heat difference.

Why did you choose to work on this project topic : Solar Energy is the non-exhaustible power available at every corner and at all the time. Every requirement on the sides of domestic, industrial, manufacturing, technology, electronics and literally any field can be fulfilled. If surplus energy can be given to all these fields then, human power could do wonders.The efficiency of generation techniques of energy from solar power so far been developed still in the quarter path. Hence, alternate way of utilizing solar power for power generation would bring out a revolution. This paper aims to innovate a new methodology for electricity generation from ever reliable solar energy.

Project Highlights : This proposal is primarily for meeting every energy crisis by harnessing electrical energy from an ever reliable energy by converting it to heat. Any heat can’t be made to electricity at all times as the thermoelectric generators are quite good thermal conductors too. Hence, for power generation this heat used must be from a source which continuously has energy in it. If the increase in temperature is of such a large magnitude and efficient thermo-electric conversion is possible, then the above strategy could make a great impact in the field of energy, thereby in every named field.


Project Category : Electrical / Electronics / Communication
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Institute/College Name: Sri Ramakrishna Engineering College
City: Coimbatore
State: TamilNadu
Participating Team From: Third Year

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