Energize the Future with Waves


The ocean provides an abundant source of renewable energy, including wave energy. Hann-Ocean’s wave technology “Drakoo” can generate economic electricity from all scales of waves. Since 2008, the Drakoo has been developed and tested extensively in full-scale in the sea as well as in large-scale wave flumes including the independent Narec’s verification. With our first commercial pilot project (16kWp) delivered in 2013 and after four more years product optimisation, the latest Drakoo WEC is now ready to offer an affordable and sustainable power supply for the offshore industry, coastal developments and remote islands worldwide.

The ocean provides an abundant source of renewable energy, including wave energy. Hann-Ocean’s wave technology “Drakoo” can generate economic electricity from all scales of waves. Since 2008, the Drakoo has been developed and tested extensively in full-scale in the sea as well as in large-scale wave flumes including the independent Narec’s verification. With our first commercial pilot project (16kWp) delivered in 2013 and after four more years product optimisation, the latest Drakoo WEC is now ready to offer an affordable and sustainable power supply for the offshore industry, coastal developments and remote islands worldwide.

Hann-Ocean Energy is a wave technology developer from Singapore. In 2008, a Twin-Chamber Oscillating Water Column Wave Energy Converter (WEC) was invented by Henry Han Lei, the founder of Hann-Ocean. The wave technology was named ‘Drakoo’. Since then, our professional team has been conducting R&D on the proprietary Drakoo wave technology. It has been developed and tested in full-scale in the Singapore sea as well as in Narec’s and Hann-Ocean’s large-scale wave flumes for its performance, reliability and endurance tests. After 9-year development, the latest Drakoo Type-B WEC 10kWp module is now ready for order. We believe that the Drakoo is the most efficient and diversified WEC technology to date. It will set a brand-new technology standard that allows wave energy to meet growing global demand for clean energy.

Why Wave Energy


Wave energy is a vast, untapped resource that could help reduce our reliance on fossil fuels. Like solar and wind power, wave power harnesses energy that comes ultimately from the sun. However, wave power is about ten times and 100 times denser than wind and solar energy respectively (depending on sea locations). Compared to solar and wind, waves are easy to forecast, and unlike solar, wave energy can be harnessed 24/7.

Wave energy is a vast, untapped resource that could help reduce our reliance on fossil fuels. Like solar and wind power, wave power harnesses energy that comes ultimately from the sun. However, wave power is about ten times and 100 times denser than wind and solar energy respectively (depending on sea locations). Compared to solar and wind, waves are easy to forecast, and unlike solar, wave energy can be harnessed 24/7.
The ocean wave is the unexploited greatest potential renewable energy resource in the globe. International Energy Agencies projected the potential of global wave energy to be about 8,000-80,000 TWh per year, and typically 10-60 kW per meter along the coasts. The energy supply in the future will be a mix of multiple types of clean energy sources. The Australian Power Generation Research Institute predicted that wave power generation would account for about 20% of the total power generation by 2050.
The ocean wave is currently not a significant contributor to the total output of clean energy productions. Although various concepts exist, the majority suffers from a relatively low efficiency and is susceptible to breakdowns compared to other more mature clean energy technologies such as wind turbines and solar panels. However, the ocean wave is the unexploited greatest potential renewable energy resource because it is dense, predictable, persistent, and widely available along coastlines and in the deep oceans. To have wave energy widely, we need technology breakthroughs in the energy conversion, which has attracted worldwide research and development efforts. For the goal, Hann-Ocean is dedicated to the sustainable energy technology development.

Three key factors making the wave energy attractive and feasible:

1.
The wave energy flux in terms of kW/m represents the annual average wave power density for a specific sea location. The higher the wave energy flux, the denser the energy resource. Electricity demands of various locations near the coastlines set potentially usable electricity limits. Ideally, wave power production should be located as close as possible to the end-consumers to save the transmission costs and reduce the power loss.
2.
The energy demand and resource for small communities at coastal areas, on remote islands or offshore platforms, make us believe that they will benefit the most from ocean renewable energy generation, especially for those who pay a premium on electricity prices for diesel transport and diesel power generation.
3.
The political factors in the selected areas heavily influence the prospective returns of investments in ocean renewable energy project developments. As a response to the world climate change, many governments have established renewable energy development incentives including grants and feed-in tariffs to promote and accelerate the clean energy development.
In advance of any wave project development, we evaluate the wave energy resource based on the local wave statistics including wave height, period, seasonal distributions, directional probabilities and tidal change. We also carefully analye the local electricity demand, cost of electricity as well as the government incentives at the particular location to identify the most promising sea site for wave energy generation. Utilizing our unique methodology and advanced in-house software, we can deliver an optimal configuration of Drakoo for best economic return.
Highly-denseSustainable
Predictable24/7

Drakoo - the Ultimate Wave Energy Converter


The internationally patented Drakoo wave energy converter can absorb, transform and convert wave energy into electricity while reducing reflective waves in the ocean. The simplicity and optimisation of the Drakoo allow for economic electricity generation from all scales of waves efficiently. It is deployable in both shallow water and deep seas.

The key advantages of Drakoo WEC technology can be expressed by ESSV as follows:

Efficiency
Simplicity
Scalability
Versatility
Drakoo is the most efficient wave energy converter ever devised. It is due to the use of one-way flow checkerboard valves and the direct conversion of hydraulic energy to electrical energy via the Kaplan turbine coupled directly to the permanent magnetic generator. It has been proven by the Drakoo 1kWp prototype tested in Narec UK and the Drakoo 10kWp demonstrator in Hann-Ocean Energy (Nantong, China)
Drakoo is unique due to the simplicity of the energy conversion process and the minimal number of moving parts below the water, including the flexible one-way flow checkerboard valves, and the Kaplan turbine. This simplicity results in low construction cost, low cost of electricity produced and ease of maintenance.
Drakoo can be configured for any wave conditions to produce electricity (from 0.3m up to 5m waves). Its power output can be in the range of 100W (for a single unit) to a few MW (for a large array). Our practical choice of Drakoo array capacity is optimied for life-cycle cost-effectiveness based on the wave statistics and the demand for annual average power of the selected site.
Drakoo has multiple applications in both fixed and floating mode. It can be deployed in shallow or deep waters to supply power to isolated islands. It can also be integrated with breakwaters, floating architectures, or O&G platforms to provide baseload power to the grid. The Drakoo can be easily customized for whatever situation the end user requires.

Drakoo transcends any other alternatives in the wave energy industry with the ESSV.

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