Abstract

Sun as a source of energy has long been in the limelight when it comes to sustainable and virtually nonexhaustive means of energy. Fossil fuels due to their limited reserves and environmental toxicity are concluded to be unreliable and injurious to health for the living species on the planet earth. Scientists around the globe are emphasizing on the efficient utilization of renewable energy resources such as solar energy, wind energy, biomass energy, tidal, geothermal etc. due to their unpolluting and renewable nature. Among all these, solar energy is assumed to be the most promising source of unexhaustible energy. Sun light can be converted to usable energy in the form of heat and electricity directly. Solar energy harvesting techniques can be broadly classified into two categories: (1) direct electricity generation using solar photovoltaic panels; (2) indirect conversion using solar thermal collectors. This chapter systematically describes most important solar energy harvesting techniques with elaborated working principles and sub classifications.

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