The Earth’s oceans are recurrently heated by the sun and these oceans envelop virtually 70% of the Earth’s surface area. There is a regular temperature variation. This variation in temperature has an enormous quantity of solar energy which can prospectively be controlled for human use. The energy that is renewable and is non-commercial is called the alternate sources of energy. This alternate source of energy comprises in its major category the solar energy which can be highly derived from the broad water masses, that is from the oceans. The rigid confrontation is the act of transforming this energy of the ocean that also gets regenerated from the sun to the daily use in the human periphery. This extraction could be made cost efficient on a large scale. As a result it will supply a resource of renewable energy necessitated to covenant with energy shortages, and other energy problems on earth for the human beings, especially.

There are some non-conventional energy sources; viz, solar energy, solar thermal technology, solar photovoltaic technology, biomass production, wind energy and many of such kinds. Among all this the major contribution made by the oceans is in generating energy by the wind and the heat that gets produced. When the ocean gets forced with the surface temperatures over its huge water body the salinity and the wind gets highly terminalized to form energy. The wind over the ocean gets extremely stressed; as a result there is the dramatic change and drastic formation of energy in the heat flux of the ocean. The Ocean Thermal Energy Conversion, in short it is ‘OTEC’ is the standard acceptance of this phenomenal energy generating device of the renewable solar energy. The presence of OTEC systems has an overall competence of merely 1 to 3%. Whereas the theoretical competence of it in utmost lies between 6 and 7%. The energy transporter, seawater, is free, although it has admittance cost correlated with the pumping materials and pump energy costs. Ocean thermal energy conversion (OTEC) is a technique for producing electricity which utilizes the temperature difference that subsists amid deep and shallow waters to run a heat engine. For any kind of heat engine, the most competent and influential factor is created with the prevalent temperature variation. This temperature variation normally enhances with the decreasing latitude, i.e. in close proximity to the equator, in the tropics. On the other hand, the evaporation of the water checks the surface temperature from exceeding 27˙C, that is to say 80˙F. In addition to this the subsurface water exceptionally falls beneath the temperature of 5˙C. Thus foremost technical challenge that OTEC faces is to produce considerable quantities of power, from the frequently changing ratio of small temperature. The concept of a heat engine is very common in thermodynamics engineering, and much of the energy used by humans passes through a heat engine. A heat engine is a thermodynamic device placed between a high temperature reservoir and a low temperature reservoir. As heat flows from one to the other, the engine converts some of the heat energy to work energy. The notion of a heat engine is incredibly general concept of elaboration in the study of thermodynamics engineering. It has been found that almost all the energy used by humans passes through a heat engine. A heat engine is a thermodynamic piece of equipment set between a high temperature reservoir and a low temperature reservoir. At the same time as heat courses from one to the other, the engine converts some of the heat energy to work energy. This principle is used in steam turbines and internal combustion engines, while refrigerators reverse the direction of flow of both the heat and work energy. Rather than using heat energy from the burning of fuel, OTEC power draws on temperature differences caused by the sun’s warming of the ocean surface. This principle is used in steam turbines and internal combustion engines, while refrigerators reverse the direction of flow of both the heat and work energy. Rather than using heat energy from the burning of fuel, OTEC power draws on temperature differences caused by the sun’s warming of the ocean surface. The single heat cycle appropriate for OTEC, is the Rankine cycle. It uses a low-pressure turbine. Systems might be either closed-cycle or open-cycle. Closed-cycle engines use working fluids that are characteristically considered of as refrigerants such as ammonia or R-134a. Open-cycle engines use the water heat source as the working fluid.
Though the total energy obtainable is one or two orders of magnitude advanced than other ocean energy alternatives such as wave power. However the small size of the temperature difference makes energy withdrawal reasonably easier said than done and costly. This is due to the low thermal efficiency of the upcoming scientific peripheries of energy generators. The massive renewable energy from the ocean has yet not been practiced in any large scale, but it has been estimated that the ocean can give an amount of 7400 exajoules energy per year. If the ocean is activated as the renewable energy resource base than this huge amount of 7400 exajoules will get generated. The tropical oceans absorb a huge amount of 560 trillion gigajoules, ‘GJ’ of solar energy each year. This figure is equivalent to 1,600 times the energy used by the whole world in a year.

Via otecnews

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