Marine energy is one of the cleanest types of alternative energies, but it is not produced using fresh water. Marine energy is dependent on tidal waves for generating electricity. Tidal waves are not as reliable as water of the seas and rivers. Therefore, scientists have been looking for a way to produce energy from sea, river and lake water without causing pollution. Continue reading New technology to heat homes through river and sea water
The dynamic equation between sun, earth, wind and water result in the formation of waves, which are unbound sources of energy that come crashing onto the shore. The longer the wind pushes the wave, the stronger it is, in fact the wave will be strong enough to generate enough energy to solve at least 10% of the Earth’s energy crisis.
Wave power is a form of wind power as waves emanate at the center of the sea when low-pressure zones cause ripples. These ripples are fanned by the wind and are carried up to the shore where they break after covering a distance of thousands of miles. The rise and fall of the wave consist of collecting wind energy, which can be harvested by using moving elements. Unlike hydro power, the water itself is not the catalyst here; it is just the agent that harnesses energy.
With the depletion of fossil fuels and ever-growing demand of energy, new sources of renewable energy are needed to be tapped. Tidal energy is one such option. Tidal energy converts energy from tides, i.e. continuous flow of water. Tidal energy was tapped 100s of years ago in waterwheel techniques. In mid and late twentieth century, many countries such as France, China and Canada tried to capture tidal energy. However, high cost- both environmental, as well as financial discouraged their large-scale use.
A Robot called Benjamin is one of the four wave gliders developed by Liquid Robotics, which has travelled more than 3000 nautical miles from San Francisco to Hawaii and broke the record of travelling the longest distance that any unmanned vehicle has covered so far. The wave gliders were let out into the ocean on November 17, 2011 and they have completed the first leg of their journey across the Pacific and now will be embarking on a more ambitious trip, this time covering 5,000 more nautical miles, to reach Australia and Japan. Each of these gliders has a floating buoy, tethered to an underground winged platform and it the motion of waves that paddles the buoy forward.
The Defence Advanced Research Projects Agency and a team of researchers from MBARI lead by Andy Hamilton are working together on project ‘power buoy’ that will supply electricity for oceanographic instruments in Monterey Bay. The basis of the project is to harness wave power and divert it for electricity generation. After nine months of intensive research, Hamilton devised a buoy measuring 2.5m across, hanging in the water it is a massive metal plate 3m wide and 5.5m long. Throughout the team was faced with many challenges working with erratic ocean waves and a complex hydraulic system, these are discussed after the break.
With the world going gaga about environment friendly technology to suffice our daily needs, Scotland is not far behind. Scottish Power Renewables (SPR) has conducted a test on an immersed turbine which can be utilized to harness tidal power to produce electricity. This turbine coined as ‘Andritz Hydro Hammerfest’ has successfully completed its testing period in northern isles of Orkney – in the island of Eday, This will prove to an encouraging step in Scotland’s idea to go green by generating electricity from tidal power as part of the tidal power initiative.
Today with increasing global warming and increasing awareness of other environmental hazards, more and more people across the world are focusing on harnessing natural sources of energy like wind energy. Wave power is a renewable source of energy and is available in abundance. Wind energy provides clean fuel which is environment friendly and does not produce greenhouse gases. And to capitalize on its greener attribute, we have been utilizing ocean waves for centuries.
Energy companies are finding success in efforts to generate power from sea waves. As the search for more alternative energy sources is going wild, an Israel start-up energy company Eco Wave Power has developed two small-scale devices for wave energy. The devices, dubbed the ‘Wave Clapper’ and the ‘Power Wind’ are still under work. The company intends to mass-produce the devices once the final round of testing is successfully over.
With the need for energy growing all around the world, we have to explore newer and better sources of energy. One resource that has been largely untapped till now is the energy from sea and ocean waves. The best thing about this resource is that it is completely natural, green and nonpolluting. Wave energy could well turn out to be the next ‘wave’ of energy production ideas. Here are five innovative systems designed to harvest the power in waves.