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Tidal Energy: A Predictable Source of Clean Power

Tidal Energy


In an era when global energy demand continues to rise each year—driven by urban expansion, industrial growth, and transportation—renewable energy has become a crucial solution for sustainability and environmental conservation. Many people are already familiar with solar and wind power, but there is another promising alternative derived from water that is equally compelling: tidal energy.


Tidal energy is a form of renewable energy that has existed for a long time, yet it is not as widely recognized as other energy sources. Its key advantage is that it is highly predictable. Tidal patterns occur in regular, measurable cycles every day, unlike solar energy, which depends on weather conditions, or wind energy, which can be more variable and uncertain.


What Is Tidal Energy?


Tides are caused by the gravitational forces of the moon and the sun acting on the Earth’s oceans. These forces create periodic rises and falls in sea levels, typically occurring about twice a day. The moon has the greater influence because it is closer to the Earth.


The difference in water levels between high tide and low tide can be harnessed to generate hydroelectric power.


One of the most widely used techniques is the tidal barrage system. This method involves constructing a dam or barrier across a river estuary or bay. During high tide, seawater flows into a basin behind the barrage. When the tide recedes, gates are opened to allow the stored water to flow back out. The movement of water from a higher level to a lower level spins turbines that generate electricity. This approach is an efficient way to produce clean energy from water.


A well-known example is the La Rance Tidal Power Station in France, which has been operating since 1966 with a generating capacity of 240 megawatts. It is considered a pioneering model of modern tidal energy and continues to produce electricity today.


Tidal Energy


Advantages of Tidal Energy


1. No Air PollutionElectricity generation from tidal energy does not emit greenhouse gases like coal or fossil fuels, helping reduce long-term environmental pollution.


2. Renewable and InexhaustibleTides occur naturally every day and do not rely on finite resources, making tidal energy a sustainable power source.


3. Stable and Predictable OutputTidal movements can be calculated with high accuracy, allowing for more reliable energy planning compared to wind or solar power.


4. Does Not Always Require Large Land AreasSome smaller coastal regions with significant tidal ranges can generate substantial electricity without needing vast installations.


Limitations of Tidal Energy

1. Limited Suitable Locations

Effective tidal energy projects require areas with a tidal range of at least 5 meters, which are not common worldwide. For example, Thailand’s average tidal range is only about 2.5 meters, making large-scale investment less viable.


2. High Construction Costs

These projects require significant upfront investment and long construction periods, particularly for dams and supporting infrastructure.


3. Potential Environmental Impacts on Coastal Ecosystems

Building barrages or barriers may disrupt local ecosystems by altering natural water flow, which can affect marine life and coastal vegetation.


The Future of Tidal Energy

Tidal energy is a clean and renewable resource with strong potential for the future. Its predictability, stability, and lack of emissions make it an attractive option for reducing dependence on fossil fuels while protecting the environment.


Although geographical constraints and construction costs remain challenges, advances in technology and innovation may make tidal power more cost-effective and accessible in many countries. With continued development, nations—including Thailand—may one day find new opportunities to harness this reliable source of clean energy.


Greenergy (Thailand) Co., Ltd. has a team of expert engineers ready to provide consultation, design, installation, and lifetime maintenance services.

You can contact us or request a consultation through the following channels:

Phone: Sales Department +66 81 235 6832

LINE: @greenergy


 
 
 
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