ABSTRACT
Energy plays a crucial role in social and economic development. Remarkable increases in oil prices have stimulated research in the renewable energy field as it contributes to the diversity in energy supply. Compared to other types of energy, renewable energy reduces the dependence on fossil fuel resources and carbon emissions to the atmosphere. Nobuyuki (2006) gives the latest data which show that renewable energy technologies provide 13.3% of the energy need around the world (Baños et al., 2010) and will be greatly dependent on the future, considering their sustainability and wide public acceptance. The total incoming solar radiation is about 3.8 million EJ per year, which can meet the entire energy demand if harnessed properly.
