Renewable sources of energy.

Renewable EnergyBy Mateusz FoligowskiLászló Molnár andSergejus Ivanovas

Agenda

What is renewable energy?Why do we need these?Types of renewable sourcesConclusion

What is renewable energy?

Generated from:SunlightWaterWindRainTides

Geothermal sourcesBiomass sources

Why do we need these?Lack of non-renewable energy

Coal 150-170 yearsFossil 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!