Electricity Generation by the Ocean Thermal Energy

Etemadi, Ahmad; Emdadi, Arash; AsefAfshar, Orang; Emami, Yunus

doi:10.1016/j.egypro.2011.10.123

Cited by 44 publications

(18 citation statements)

References 2 publications

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“…Generally, with OTEC technology, the temperature gradient from the ocean surface to deep waters (~1000‐m depth) can be used to convert heat energy into electricity. It functions best when there is a temperature difference of at least 20 °C []. Also, the cold deep waters are available for intake at around 450–750 m, within a short horizontal distance from the coast .…”

Section: Methodsmentioning

confidence: 99%

Regenerative OTEC systems using condenser effluents discharged from three nuclear power plants in South Korea

Park

Kim

et al. 2014

Int. J. Energy Res.

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SUMMARYIn this study, the availability of ocean thermal energy conversion (OTEC) power plant has been evaluated and analyzed with condenser effluents discharge from nuclear power plant. For this, we have also calculated the performance of OTEC power system by various computer programs based on thermodynamical theories. The computer programs are developed for simulation of the closed cycle, regenerative cycle, Kalina cycle, open cycle, and hybrid cycle under equivalent conditions and various working fluids. Among these OTEC cycles, the regenerative cycle with R-134a shows the highest efficiency. It also has used the condenser effluents from the Kori, Wolsong, and Uljin nuclear power plants instead of the surface water to analyze the thermodynamic performance of the OTEC regenerative cycles. The Kori, Wolsong, and Uljin nuclear power plants have shown maximum efficiencies of 5.21%, 5.15%, and 4.83%, respectively. The net powers are 131, 93, and 192 MW at the three locations, respectively.

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Section: Methodsmentioning

confidence: 99%

Regenerative OTEC systems using condenser effluents discharged from three nuclear power plants in South Korea

Park

Kim

et al. 2014

Int. J. Energy Res.

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“…Ocean thermal energy is generated as a consequence of a process that begins with the incidence of solar rays on the sea, increasing its temperature [55]. Sea water allows the rays to penetrate through its surface, being able to increase the temperature of lower layers of sea water.…”

Section: Ocean Thermal Energymentioning

confidence: 99%

What about Marine Renewable Energies in Spain?

Esteban

Espada

Ortega

et al. 2019

JMSE

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Renewable energies play a fundamental role within the current political and social framework for minimizing the impacts of climate change. The ocean has a vast potential for generating energy and therefore, the marine renewable energies are included in the Sustainable Development Goals (SDGs). These energies include wave, tidal, marine currents, ocean thermal, and osmotic. Moreover, it can also be included wind, solar, geothermal and biomass powers, which their main use is onshore, but in the near future their use at sea may be considered. The manuscript starts with a state-of-the-art review of the abovementioned marine renewable energy resources worldwide. The paper continues with a case study focused on the Spanish coast, divided into six regions: (I) Cantabrian, (II) Galician, (III) South Atlantic, (IV) Canary Islands, (V) Southern Mediterranean, and (VI) Northern Mediterranean. The results show that: (1) areas I and II are suitable for offshore wind, wave and biomass; (2) areas III and V are suitable for offshore wind, marine current and offshore solar; area IV is suitable for offshore wind, ocean wave and offshore solar; (3) and area VI is suitable for offshore wind, osmotic and offshore solar. This analysis can help politicians and technicians to plan the use of these resources in Spain. the short and medium term, the high capital cost in the first project of each technology, the lack of experience and environmental aspects, etc. These barriers are smaller or larger depending on each of the oceanic technologies and its current development stage.In recent years, this industry has seen encouraging signs, with some of the technologies showing significant progress. This is the case for offshore wind and tidal energy, which can be considered mature enough to be ready for their commercial development. Regardless, other technologies follow a slower learning curve. Based on this, the forecasts in the short, medium, and long term are not ambitious at all [2]. With the objective of promoting the sector, various initiatives have emerged to take advantage of its energetic potential. One of them is the Implementation Agreement of Oceanic Energy Systems (IEA-OES), which aims to have installed 337 GW of capacity worldwide in 2050, objective difficult to be achieved with current figures.Another key aspect in the development of this type of project is the Levelized Cost of Electricity (LCOE) [3]. LCOE value is very high in the case of prototype projects, having a lot of room for improvement. It is important to take into account that the energy generated must have a competitive cost [4]. On the other hand, the use of green energy has other benefits. In fact, governments must support this type of project with some incentives to help the companies involved, above all in the early stages of the development of those technologies. On the other hand, a better perception of the citizens about marine renewable energy is essential, because nowadays there is a great ignorance of the possibilities of the ocean to offer clean and endles...

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“…In order to operate at lower temperatures, and therefore access a wider range of renewable energy sources, water must be replaced by lower boiling temperature fluids such as alkanes or fluoroalkanes [3], [4]. For example, such fluids are used in organic Rankine cycles (ORC) for applications like geothermal energy conversion, biomass combustion, ocean thermal energy conversion or low grade waste heat recovery [5], [6], [7], [8] or energy storage [9].…”

Section: Introductionmentioning

confidence: 99%

Thermogravitational Cycles: Theoretical Framework and Example of an Electric Thermogravitational Generator Based on Balloon Inflation/Deflation

et al. 2018

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Several studies have combined heat and gravitational energy exchanges to create novel heat engines. A common theoretical framework is developed here to describe thermogravitational cycles which have the same efficiencies as the Carnot, Rankine or Brayton cycles. Considering a working fluid, enclosed in a balloon, inside a column filled with a transporting fluid, the cycle is composed of four steps. Starting from the top of the column, the balloon goes down by gravity, receives heat from a hot source at the bottom, rises and delivers heat to a cold source at the top. Unlike classic power cycles which need

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Electricity Generation by the Ocean Thermal Energy

Cited by 44 publications

References 2 publications

Regenerative OTEC systems using condenser effluents discharged from three nuclear power plants in South Korea

Regenerative OTEC systems using condenser effluents discharged from three nuclear power plants in South Korea

What about Marine Renewable Energies in Spain?

Thermogravitational Cycles: Theoretical Framework and Example of an Electric Thermogravitational Generator Based on Balloon Inflation/Deflation

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