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Renewable EnergyBy Mateusz FoligowskiLászló Molnár andSergejus Ivanovas
Agenda
What is renewable energy?
Why do we need these?
Types of renewable sources
Conclusion
What is renewable energy?
Generated from:SunlightWaterWindRainTides
Geothermal sourcesBiomass sources
Why do we need these?
Lack of non-renewable energy
Coal 150-170 years
Fossil Fuel 30-40 years
Nuclear energyLong time, but low level of social acceptability
Why do we need these?
Environmental problems
Water pollution
Air pollution
Nuclear waste
Why do we need these?
To avoid disasters
Types of renewable sourcesI. Solar energy
The sun is free, but the solar cells and other equipments are very expensive Varies with the season and weather
Comes from the sun To heat or light buildings, to generate electicity, to heat the hot water Passive and Active solar energy
Types of renewable sourcesII. Wind power
Windmills -> to pump water or grind grain Wind turbines -> to genetare electricity World’s fastest-growing energy technology 1% of the world’s electricity comes from this way It requires big territories
Types of renewable sourcesIII. Hydro power
Renewable due to the water cycle Hydroelectric energy, Micro hydro system, Damless hydro system, Ocean energy
Uses water to power machinery or make elctricity It gives the 20% of the World’s electricity and the 63% of the energy from renewable sources
Types of renewable sourcesIV. Geothermal energy
Obtained by tapping the heat of the Earth Expensive to build, but cheap to operate Dry steam, flash plants, binary plants Hot dry rocks technology Main users: USA, Iceland, Chile, Philippines
Types of renewable sourcesV. Biomass and Biofuel
Material from living, or recently living organisms. Wood, waste, (hydrogen) gas, and alcohol fuels. Biomass is commonly plant matter grown to generate electricity or produce heat.
Using of renewable energies
Thanks for the attention!