China renewable energy like tidal, wave, solar, wind

 

China is the biggest trading nation in the world with a population of over 1 billion people. It is the fastest growing consumer market and it will continue to be a great demand of energy. In these times rapid growth of it remains a challenge to reduce China’s dependency on fossil fuels. The Environmental effects of a coal-based economy are inevitable and of sustainable energy sources.

 

Despites its dependency on coal, China is the world’s largest investor in renewable energy like tidal, wave, solar, wind etc. Prestigious renewable energy plans illustrate the increasing importance of renewable’s in China’s energy production. Additionally, it is exploring ways to utilize the unlimited and enduring energy sources of the ocean. China has a very long cost line and vast territorial waters containing and abundance of energy.

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The Chinese government places a high emphasis on the development on ocean energy and has included it on the 12th five years plan. Netherland has grown experts in the implementation of highly advanced technologies in, on and near the water, who are dedicatedly working now in China. Coastal engineer from the Netherland, Kees Hulsberger has been working for over 3 decades on coastal water works, studying a map of the North Sea with his colleague Rob Steijin, he stumbled onto a potentially ground – breaking idea to harness the oceans power to our benefits.

 

“Dynamic Tidal Power” is one of the greatest inventions of them, which can be very much effective to generate electricity from marine tide.

 

Dynamic tidal power is designed to generate electric energy from the kinetics of tidal water. A long dam of at least 30 km perpendicular to the coast interacts with the tidal flow to create a hydraulic head. A barrier paralal to the coastline at the far end of the dam givingit a T-Shape amplifies the head on either side of the structure.

 

 

This hydraulic head, together with the shape of the tunnels, results in the acceleration of water that drives the many turbines in the dam “Marcel Stives” is professor of coastal Engineering at the Delft University. He has done intensive research on tidal currents and sees in dynamic tidal power an interesting alternative to traditional tidal power. What makes dynamic tidal power so special is that is uses tide powers but not by extracting energy in a strait leading into a bay or estuary but simply along the coast line.

 

Areas with good potential for the implementation of DTP are relatively shallow, and have tidal currents running parallel to the coast line.

 

Building a 40 km structure out in the open sea is a challenging task but anything can be built with articulated vision, appropriate aspiration and necessary skill and expertise.

 

Power group, a famous international group that works to build tidal energy project, has all capabilities to successfully advice an endeavour of this scale. Collaborating members contribute expertise on the implementation of electric infrastructure, ecological conservation urban planning, hydraulic innovation, and the construction and design of highly advanced turbines.

Significant to making such a high level of energy production possible is the use of highly advanced turbines that are designed especially for these purposes. They work with an extremely bow head, are bi-directional and have a peak output of 5 mw each.

 

    

 

A dam of 40 km in length can accommodate 2000 turbines corresponding to over 10 GW of installed capacity and is enough to supply million of household with sustainable energy.

 

The oceans have vast resources of energy and there are no Co2 emissions as a result of their extraction. They are without pollution and completely renewable. It is the direction for future development for humanity. So, more people should engage in research to further understand ocean energy. In September 2012, China and Dutch government signed an agreement to continue investing in the implementation of Dynamic Tidal Power in China.

 

By combining Chinese and Dutch expertise, the constructing of a Dynamic Tidal Power Dam can be developed into an economically viable and environmentally sustainable investment. With the latest knowledge and technology China sets itself up to achieve its objective of generating more than 15% of its energy from renewable energy sources by the year 2020.

 

Table: “Dynamic Tidal Power” at a glance

Subject

Description

DTP

Dynamic Tidal Power

Main Job

Generating electricity through tidal power

Inventor

Rob Steijn and Kees Hulbergen

Project Cost(30 km Long)

$10 billion

Power generation capacity

8 GW (8000MW)

Annual power generation capacity

23 billion kWh

Annual economic contribution

$1006.25 million

Source: http://www.powerdtp.nl/dtp/default.aspx

 

Advantages of Dynamic Tidal Power

The main benefit from dynamic tidal power is that a single installation could produce anywhere from 8 to 15 gigawatts of power, orders of magnitude more than any other tidal energy system. An 8 GW installation could generate over 20 terawatt-hours of electricity in a year, which is enough for more than three million Europeans. (http://tidalpower.co.uk/dynamic-tidal-power)

The second advantage to DTP is that it is stable. Because it generates power no matter which direction the tide is moving, the system is more continuous than other forms of tidal energy. It is more reliable than any other renewable like solar or wind because the tides are constant, predictable, and not influence by cloud, lack of wind, drought, etc.

Dynamic tidal power doesn’t require a high head. In other words, water levels need not be dramatically higher on one side of the barrage compared to the other to generate the large amounts of power anticipated. This means that many more locations are suitable for DTP than for tidal barrage or tidal stream generators.

Moreover, it is very effective and creates a fish friendly environment so that the biodiversity on the marine coastal area remain the same. There is no co2 emission in producing electricity through DTP plant.

Finally, DTP offers the potential for combined function such as port protection, integration with wind turbines, aquaculture and research facilities, and more.

 

Disadvantages of Dynamic Tidal Power

Of course, dynamic tidal power is not a silver bullet. It has three major disadvantages.

First, DTP is untested, so there is no way to be certain it will work without building a facility. This brings up the second problem, which is cost. A 30 km barrage is a very expensive undertaking and will cost tens of billions of dollars to build before we can even be certain it will work. This is to say nothing of the engineering difficulties associated with building a 30 km dam out into the ocean.

Finally, there is no way to be certain of the environmental impacts of DTP. Overall they are likely to be less than the use of barrage systems, but blocking off large lengths of coastal flow may disrupt mating patterns, migration patterns, and more. The ecologic impact could be tremendous.

 

Conclusion:

In spite of some demerits and barriers, DTP Plant is now becoming very popular in the world for its acceptability and co2 emission free electricity production.  DTP is helpful to the marine coastal biodiversity and causes no harm. There are some countries in the world like China; Korea has already started their works to generate tidal energy through DTP and some countries have taken a long 5th year plan for the future. As a developing country of South Asia, Bangladesh has not take so much effective projects to generate electricity from the renewable energy sources yet, where China is producing more than 15% of total electricity from the renewable sources. So, the government of Bangladesh has to take proper steps to established DTP on the coastal area to fulfill the extra demand of electricity and to keep the power continuity in different important industries, factories and different export oriented sectors.

In this regard, the government should negotiate with the world class coastal engineers of the world to proper survey the coastal area as Bangladesh has a huge probabilities to be a great source of renewable energy along it 1400 long coastal area.