Saturday, May 15, 2010
SOLAR ENERGY FACT
Solar energy is the most abundant source of energy available to mankind. We will never run out of solar energy unless the sun dies. According to Wikipedia, there will another 7.8 billion years before the sun reach the next phase of evolution. This is the stage in which helium fusion will begin producing carbon and oxygen. By then, human race will either no longer exist or already came up with a solution to scope with the problem.
Beside it availability, it also have many useful characteristics that make it one of the most suitable form of energy. These characteristics are listed below:
Collect & Store:
Like most energy sources, solar energy can be collected and stored in almost any form of storage designed to hold energy. Energy storage like battery is very important if we want to involve solar energy in our modern way of life. We demand energy almost anytime and we expected to be available immediately. This is a problem since solar energy only available during daylight. For this reason, storing energy is a very crucial application. This application is usually integrated into solar photovoltaic system where energy collected and stored almost instantaneously.
In a typical photovoltaic system, sunlight shines upon the photovoltaic modules. Next, solar cells convert light energy into electrical energy producing direct current (DC). This current is stored directly into a battery. Since our home use Alternating Current (AC), an inverter is connected to the battery to convert from DC to AC. With this typical arrangement, solar energy can be effectively used to power our home.
Absorb:
According to the first law of thermodynamic, energy cannot be created or destroyed. Energy can only be transferred from one system or another. This concept spawns the property in which energy can be absorbed by a system or object. As solar energy shine upon the earth, any objects that are exposing to sunlight will have the potential to absorbed energy. For instance, if you leave your car outside on a sunny day it will become hotter as it slowly absorbing solar energy. With this basic property, we are indirectly obtained energy from the sun to power our everyday activities.
Transmit:
An interesting fact about nature is that there is an opposite of everything. If energy can be absorbed then it should be able to transmit. In fact, if no energy is transmitted then there is no energy to absorb. Therefore, the transmit property of energy is also very important.
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