Wave energy and tidal power
Wave energy
Wave energy benefits the potential- and kinetic energy of wave movement, which is based on the height difference of trough and crest and the rotational energy of water molecule. The usage of wave power in power plants varies. The devices squeeze air or gas, lift the water of the turbine or transfer the kinetic energy to rotational energy. Wave energy may cause some problems which has an effect on many people. Firstly because the technology of wave energy is still an issue. Even though the wave energy is not polluted and it is a renewable natural resource, the problems are born when there aren't enough space for those very big and expensive devices. Secondly, for instance fishermen may lose their job because fishing and traffic by water must be reduced as a result of using wave energy. In addition the normal ecosystem in the sea suffers. Before wave energy can be exploited in more various places it must be developed much more from the current level. Even though wave energy doesn't work perfectly yet, it has many benefits; for instance the pollution free usage and year-round availability.
Ocean wave power energy
Source of the image: http://www.boem.gov/uploadedImages/BOEM/Renewable_Energy_Program/Renewable_Energy_Guide/OPT.jp
Tidal power
Tidal power is an energy form that is based on tides. It converts the energy of tides into useful forms of power, mainly energy. The problems of tidal power is the high cost and limited availability of sites. The sites require sufficiently high tidal ranges or flow velocities, which limits the constructing. There are tidal power plants in use in France, South-Korea, North-Ireland and Norway. The difference in low - and high tide is so small that tidal power isn't profitable in Finland.
The tidal power plant La Rance in FranceThe results of studies showed that:
In the first question: "what is wave energy based on?" 3/7 women answered correct. (potential and kinetic energy.) Half of the men answered correct.In the second question over half women knew where the largest tidal energy powerplant is located. None of the men knew the answer. (South-Korea)
Women thought that the building new wave energy power plants would be an excellent idea and men weren't so excited about the idea.
Both women and men thought that it's a good idea that the energy company Fortum has invested millions of euros on the development of wave energy.
8/11 respondents knew that these type of forms of energy weren't used in Finland.
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