Ocean's Renewable Power and Review of Technologies: Case Study Waves

Abstract

In last decades, in effect of high price of fossil fuel, environmental pollution due to fossil fuel utilization and greenhouse effect, renewable energy resources are considered as an alternative energy resource to the World s excessive energy demand. Nowadays, different technologies are utilized to energy generation from hydro power, fuel cell and hydrogen, biomass, geothermal, solar thermal, photovoltaic and wind, while the technology for converting ocean powers are still in infancy. The aim of this chapter is to introduce potential renewable power sources of ocean, mostly ocean wave power, as well as available technologies for extracting wave power. Due to high energy amount available in ocean, the issue has a strong importance to investigate. Furthermore there are variety of technologies that are developed for harnessing wave power each of which has an individual mechanism. Harvesting ocean wave power and converting to electrical power is a challenge for marine, mechanical, electrical and control engineers and we hope to give essential information about ocean wave, methods of energy extracting from wave and related electrical equipment. . . OceanThe oceans contain . % of total world water which are covering % of Earth s surface [ ]. "lso the oceans intrinsically are couple with atmosphere via air-water interface and they exchange heat, moisture, momentum and trace constituents by means of air-water interface [ ]. The fundamental processes that transfer energy from atmosphere to ocean are energy input to ocean by wind and net surface heat flux [ ]. Furthermore, ocean absorbs heat of geothermal energy via geothermal vent in ocean bed. So that, oceans are vigorous and ubiquitous sources of renewable energy which contain TWh of energy annually [ ]. Energy in oceans comes in various forms such as tides, surface wave, thermal gradient,

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