sigmund, ivan, pernille, lema, heidi, luca, sevrin
TRANSCRIPT
Sigmund, Ivan, Pernille, Lema, Heidi, Luca, Sevrin
ContentSolar EnergyWind PowerWater EnergyGeothermal Energy
Solar energy
Different forms of energyThe reason - surface receives about 1400 W/m2About 19% of the total energy
sunlight hits a solar cell
Sunlight hits an absorbing surface
Sunlight strikes a mirror or a fiber optic cable
The map is showing us which countries get the most hours of sunshine each day
Wind energy
Rapid growth predicted in the global wind energy market
Annual new installations worldwide will increase from 20 000 MW to 107 000 MW in the next ten yearsGlobally, there could be some 718 000 MW installed wind capacity by 2017.
Assets Wind does no cost anything
Produces no waste or greenhouse gases.
The land beneath can usually still be used for farming.
Wind farms can be tourist attractions.
A good method of supplying energy to remote areas.
Drawbacks The wind is not always predictable - some days have too little wind and
some days we have too much of it.
Suitable areas for wind farms are often near the coast, where land is expensive.
Some people feel that covering the landscape with these towers is unsightly.
It is a danger for the birds and they can get killed.
Can affect television reception if you live nearby.
Can be noisy. Wind generators have a reputation for making a constant, low noise all the time.
Wind turbine developments on land are quite commonly met with anger from the people the live nearby.
Growth in Global Wind Power Installed Capacity
Top Ten Wind Energy Producing Countries, 2006
The future?
Containerships pulled by huge canvas-already reality!-
The Magenn Air Rotor System (MARS)
Magenn Power plans to ship their first official product, a 10 to 25kW version in the later part of 2009/10.
Geothermal EnergyEnergy is generated from the heat in the
Earth Source of Geothermal Energy:Radioactive Nuclei down in the Earth (70%)Some Energy left from the Earth formationMetorite Impacts
Temperature in the Earth
Regions of Geothermal Energy
Ways to use geothermal Energy Hot Dry Rock Geothermal Heat Pump (works like a Fridge) Direct Water Heating
Pros and ConsAdvantages:Heat Pumps can be used to heat and coolEnvironmentally friendly, little visual pollutionWorks long time (up to 50 years)The energy is always available
DisadvantagesYou need very much money to invest (profitable in the
long term)Installation can be cause of earthquakes (often build
in sensible regions)Its not profitable in every regionEfficiency depends of the quality of the installed
system
water energy plant
Disadvantages with water energy
VegetationFish, animalsVisual PollutionPollution and
destruction of land through construction of dams
Advantages with water energyNo carbon dioxide
release It’s renewable There are large
amounts of water available
Constant availability Can store the waterNo production costThere are always
places where waves are present
Differences
Norways main energy source is pure water energy
But Norway has a big export of fossil fuels
Possibility for water energy
Other water energy typesTidal Energy Wave energy
use energy from themovements under water
Use the energy on the water surface
”Snake”