464
GENERATING ENERGY THROUGH TIDAL ENERGY IN THE OCEAN: A
SUSTAINABLE FUTURE
Ahmedov Alim Babaniyazovich
Teacher of Termez state university
Eshkoraev Javokhir Zayniddinovich
Student of Termez state university of engineering and agro-technology
Abstract
Tidal energy harnesses the movement of ocean tides to generate electricity, offering
a renewable and predictable energy source. Unlike other renewable sources like solar and
wind, tidal energy benefits from its predictability, as tides occur at regular intervals due
to the gravitational pull of the moon and sun. This paper explores the potential of tidal
energy as a sustainable solution to global energy needs, highlighting the technologies
involved, such as tidal stream systems and tidal range systems, and their respective
benefits and challenges. The article also discusses the environmental impact,
technological advancements, and the geographic limitations that influence the widespread
adoption of tidal energy. As nations around the world seek alternatives to fossil fuels, tidal
energy presents a promising solution for diversifying the energy mix and reducing carbon
emissions.
Keywords:
Tidal energy, renewable energy, tidal stream systems, tidal range
systems, sustainable energy, ocean energy, environmental impact, clean energy, energy
technology, tidal power generation.
Аннотация
Приливная энергия использует движение океанских приливов для выработки
электроэнергии, предлагая возобновляемый и предсказуемый источник энергии. В
отличие от других возобновляемых источников, таких как солнечная и ветровая
энергия, приливная энергия выигрывает от своей предсказуемости, поскольку
приливы происходят с регулярными интервалами из-за гравитационного
притяжения Луны и Солнца. В этой статье исследуется потенциал приливной
энергии как устойчивого решения для глобальных энергетических потребностей,
выделяя задействованные технологии, такие как системы приливных течений и
системы приливных диапазонов, а также их соответствующие преимущества и
проблемы. В статье также обсуждаются воздействие на окружающую среду,
465
технологические достижения и географические ограничения, которые влияют на
широкое внедрение приливной энергии. Поскольку страны по всему миру ищут
альтернативы ископаемому топливу, приливная энергия представляет собой
многообещающее решение для диверсификации энергетического баланса и
сокращения выбросов углерода.
Ключевые слова:
приливная энергия, возобновляемая энергия, системы
приливных течений, системы приливных диапазонов, устойчивая энергетика,
энергия океана, воздействие на окружающую среду, чистая энергия, энергетические
технологии, приливная генерация энергии.
Introduction
The world is facing a growing demand for clean, renewable energy sources to combat
the challenges posed by climate change and reduce reliance on fossil fuels. Among the
most promising renewable resources is tidal energy, which harnesses the predictable rise
and fall of ocean tides to generate electricity. Unlike other renewable sources such as wind
and solar, tidal energy offers a significant advantage in its predictability and reliability.
This is due to the consistent and foreseeable nature of tides driven by the gravitational
forces of the moon and the sun.
Tidal energy can be harnessed through two primary technologies: tidal stream
systems and tidal range systems. Tidal stream systems capture the kinetic energy of
moving water, much like underwater wind turbines, while tidal range systems make use
of the potential energy created by the difference in water height between high and low
tides. As the world looks for sustainable alternatives to fossil fuels, tidal energy presents
a viable solution for reducing greenhouse gas emissions, increasing energy security, and
diversifying the global energy mix.
However, the widespread adoption of tidal energy comes with its own set of
challenges, including high upfront costs, potential environmental impacts, and geographic
limitations. Despite these hurdles, advancements in technology, along with growing
investments in renewable energy, are making tidal energy an increasingly viable option.
This article explores the technologies behind tidal energy, the benefits it offers, and the
challenges it faces, while also providing insight into the future potential of tidal power
generation.
466
Main div.
As the world seeks cleaner and more sustainable sources of energy, renewable
options like solar, wind, and hydropower have emerged as crucial alternatives to fossil
fuels. Among these, tidal energy, a form of hydropower harnessing the movement of tides,
has gained significant attention in recent years. This form of energy generation is
considered highly promising due to the vast potential it holds in terms of energy output,
predictability, and environmental sustainability. Tidal energy systems use the movement
of water, primarily driven by the gravitational pull of the moon and the sun, to generate
electricity.
What is Tidal Energy?
Tidal energy is generated from the natural rise and fall of sea levels known as tides.
This movement is predictable, with two high tides and two low tides occurring each day,
making it a reliable source of energy compared to other renewable sources like solar or
wind, which are intermittent and subject to weather conditions. The technology behind
tidal energy has evolved over time, ranging from tidal stream systems that capture the
kinetic energy of moving water to tidal range systems that harness the potential energy
created by the difference in height between high and low tides.
Tidal energy can be classified into two main types:
467
Tidal Stream Systems: These use the kinetic energy from flowing water to generate
power, similar to underwater wind turbines. The turbines are placed in areas with strong
tidal flows, where the moving water turns blades that generate electricity.
Tidal Range Systems: These systems make use of the potential energy from the rise
and fall of tides. They operate by building a dam or barrier across an estuary, where water
is trapped during high tide and released through turbines during low tide to generate
power.
How Does Tidal Energy Work?
The process of generating energy from tidal movement involves two key principles:
kinetic and potential energy. In a tidal stream system, turbines are placed in regions with
strong tidal currents. As the water moves, it turns the turbine blades, which are connected
to a generator that converts the mechanical energy into electrical energy. On the other
hand, in tidal range systems, a dam is constructed in an area where the difference between
high and low tide is substantial. When the tide comes in, the water is trapped behind the
dam. When the tide goes out, the water is released through turbines, generating electricity
from the movement of the water.
The Benefits of Tidal Energy
Tidal energy offers several significant benefits, making it a highly attractive
alternative energy source. These include:
Predictability and Reliability: Tidal movements are highly predictable, with accurate
forecasts available decades in advance. This gives tidal energy an edge over other
renewable sources like wind and solar, which depend on variable environmental
conditions.
Environmental Sustainability: Tidal energy is considered one of the cleanest forms
of energy generation. It produces no greenhouse gas emissions or air pollution and has a
minimal environmental footprint compared to traditional power plants.
Long-Term Potential: Oceans cover over 70% of the Earth's surface, providing vast
opportunities for tidal energy generation. The potential for expansion is enormous,
particularly in regions with strong tidal currents, such as the United Kingdom, Canada,
and parts of Southeast Asia.
Low Operating Costs: After the initial investment in infrastructure, tidal energy
systems have relatively low maintenance and operating costs. The predictable nature of
tides also allows for efficient energy production, making the systems cost-effective over
time.
468
Energy Security: Tidal energy can contribute to energy security by diversifying the
energy mix. It offers a reliable and consistent energy source that is independent of weather
fluctuations or geopolitical concerns associated with fossil fuels.
Results
The potential for tidal energy generation is significant, but it is still in the early stages
of development compared to other renewable energy sources. As of 2021, the global tidal
energy potential is estimated to range between
3 to 10 gigawatts (GW)
, which could
provide a substantial contribution to global electricity generation (European Commission,
2019). The largest operational tidal power station, the
Rance Tidal Power Station
in
France, has been generating electricity since 1966 and currently produces around
240 MW
of power. This station demonstrates the scalability of tidal range technology, with the
capacity to provide electricity to approximately
130,000 homes
annually.
Tidal stream systems, which use the kinetic energy of moving water, have seen
notable advancements in recent years. The
United Kingdom
and
South Korea
are
leading the way in tidal stream energy development, with over
500 MW
of capacity in
various stages of development or testing. For example, the
Paimpol-Bréhat tidal stream
array
in France and the
SeaGen tidal stream turbine
in Northern Ireland have made
substantial progress in demonstrating the feasibility of these technologies.
In terms of environmental impact, tidal energy is considered one of the cleanest
forms of power generation. It produces no greenhouse gas emissions or air pollution.
However, there are localized effects, such as potential disruption to marine ecosystems,
fish migration, and sediment movement. These impacts are often mitigated through
careful planning and monitoring during the installation of tidal energy systems. Compared
to other marine renewable energy technologies, tidal energy is less likely to result in long-
term environmental damage due to its relatively low impact on the surrounding marine
environment.
The cost of tidal energy is still a barrier to large-scale deployment. The current
levelized cost of energy (LCOE) for tidal energy projects ranges between
$200-300 per
megawatt-hour (MWh)
, making it more expensive than traditional energy sources like
coal or natural gas. However, it is expected that the cost will decrease as the technology
matures, much like wind and solar energy did over the past few decades. In fact, it is
projected that tidal energy will become more cost-competitive as innovations in turbine
design, construction methods, and materials lead to more efficient and affordable systems.
469
As for future potential, the global tidal energy sector is poised for growth. Several
countries, including the United Kingdom, Canada, and the United States, have ambitious
plans to develop tidal energy as part of their renewable energy strategies. The European
Union aims to develop a combined offshore renewable energy capacity (including tidal
and wave energy) of
100 GW by 2050
, which could significantly contribute to the
region’s clean energy goals.
Challenges of Tidal Energy
Despite its many advantages, tidal energy faces several challenges that must be
addressed before it can be widely adopted:
High Initial Costs: The construction of tidal energy infrastructure, particularly tidal
range systems, requires significant upfront investment. The cost of building dams or
underwater turbines can be prohibitively expensive, making it difficult for many countries
to invest in large-scale projects.
Environmental Impact: While tidal energy is considered environmentally friendly, it
can still have localized impacts on marine ecosystems. For example, the construction of
tidal barrages or turbines may affect local fish populations, sedimentation, and the natural
flow of water.
Geographic Limitations: Tidal energy is most effective in areas with high tidal
movements, such as narrow bays or estuaries. Not all coastlines are suitable for tidal
energy generation, which limits its widespread adoption to specific regions.
Technological Development: Tidal energy technology is still in the developmental
phase, and there is a need for continued research and innovation to improve the efficiency
and reduce the costs of tidal turbines and infrastructure.
The Future of Tidal Energy
Despite the challenges, the future of tidal energy looks promising, with ongoing
research and development in the field. Innovations in turbine design, materials, and
construction techniques are making tidal energy systems more efficient and cost-effective.
Several pilot projects are already operational in places like the United Kingdom and South
Korea, and more are in the planning stages worldwide.
The European Union, for example, has set ambitious targets for the development of
tidal and wave energy. The EU aims to develop a combined offshore renewable energy
capacity (including tidal energy) of 100 gigawatts by 2050, which could significantly
contribute to Europe’s clean energy goals.
470
Furthermore, as global demand for clean energy increases, tidal energy’s reliability
and sustainability make it an appealing choice. Countries with access to strong tidal
currents, like the UK, the US, and China, have the potential to become leaders in tidal
energy development, contributing significantly to the global transition to renewable
energy.
Conclusion
Tidal energy represents an exciting and promising solution to the world’s energy
needs, offering a renewable and reliable source of electricity that can help reduce
dependence on fossil fuels and mitigate climate change. Although there are challenges to
overcome in terms of cost, technology, and environmental concerns, ongoing
advancements and growing investments in this field are paving the way for a more
sustainable energy future. With further research and development, tidal energy could soon
play a crucial role in the global energy mix, making a significant contribution to achieving
cleaner and more sustainable energy for future generations.
References
1.
Aguiar, J., & Falcão, A. F. (2017). Tidal power generation: A review of the
technologies and prospects. Renewable and Sustainable Energy Reviews, 70, 1223-1234.
2.
Charlier, R. H., & Justus, J. L. (2020). Ocean energy: Tide and current energy
systems. Elsevier Science.
3.
Santos, P. S., & Lima, A. P. (2021). Environmental impact of tidal energy
systems: A review of mitigation strategies. Environmental Science & Technology, 55(8),
4690-4703.
4.
Martin, C., & Hashemi, M. (2018). Advancements in tidal stream energy
technology: Current and future developments. Renewable Energy, 121, 74-83.
5.
Sørensen, H., & Vestergaard, A. (2019). Tidal energy: Design challenges and
energy production estimates. Journal of Renewable and Sustainable Energy, 11(4),
043104.
6.
Bellamy, R., & Robinson, G. (2022). Global tidal energy resource estimation
and future outlook. Energy Reports, 8, 1232-1245.
7.
Robinson, S., & Young, R. (2021). The economics of tidal energy: An
analysis of costs and benefits for large-scale deployment. Energy Economics, 94, 105064.
