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Renewable Energy Sources and Their Advantages and Disadvantages

Explore six different renewable energy sources including geothermal power, marine power, hydropower, wind power, solar power, and biomass. Learn about their origins, how they are exploited, advantages, and disadvantages.

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Renewable Energy Sources and Their Advantages and Disadvantages

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  1. Geothermalpower • Itoriginatesfrom the naturalradioactivedecayof some elements inside the Earth. • It's exploitedthrough the geothermalpowerstations: the vapourmoves a turbine and analternatorconverts the mechanicalenergy in electricity. • In Italy it's particularlyexploited in Tuscany (Pisa, Siena, Grosseto). • Advantages:largeamountofenergy, no environmental impact, recyclablewaste. • Disadvantages:nauseatingsmell, negative landscape impact.

  2. Marine power • Itoriginatesfrom the marine currents, the tides and the oceanwaves. • It's exploitedthroughvariouskindsofpowerstations, whichpresent a communalelement: turbinesconnectedtoalternators. • In rangeofMediterraneancurrents, itprovestobeparticularlyexploitable in the Straitof Messina. • Advantages:largeamountofenergy. • Disadvantages:possibledamageto the marine fauna, significantenvironmental impact.

  3. Hydropower • Itoriginatesfrom the flowsof the rivers and the lakes. • It's exploitedthroughdams and penstocks, wherethere are turbinesconnectedtoalternators. • In Italy itguarantees the 15% of the energydemand and it's the main alternative resourceused. • Advantages: -. • Disadvantages:significantenvironmental impact.

  4. Wind power • Itoriginatesfrom the moving air. • It's exploitedto generate electricitythroughhorizontal-axis or vertical-axeswindturbines. • In Italy itprovestobeparticularlyexploitable in Sardinia, in Sicily, on the Appennino Tosco-Emiliano, on the Appennino in Basilicata and in the area between Campania, Calabria, Molise and Puglia. • Advantages: rare malfunctions. • Disadvantages:possibledamageto the avian fauna, variabilityof the energy production.

  5. Solarpower • Itoriginatesfrom the radiationgeneratedby the thermonuclearfusionreactions inside the solarcore. • It's exploitedthrough the solarthermalpanels, whichheat up a liquid inside them, and the photovoltaicpanels, which generate electricitythroughsemiconductors. • A legislationfavourabletoinstallationofphotovoltaicpanelsbecamelaw in Italy in 19 September 2005. • Advantages:enormousamountofenergy. • Disadvantages: low energy density, high costs, variabilityof the energy production.

  6. Graziella Green Power The company hasrealizedphotovoltaicimplantsbothashore and on buildingsafterabstestosremoval and turnstolocalsuppliersasmuchaspossible. Nowadaysitowns 237.823 installedmodules and produces around 90.000.000 kWh.

  7. Energy frombiomass • Itoriginatesfrombiodegradableproducts, waste and remains. • It's exploitedthroughthermal, chemical or biochemicalconversion. • It's exploited in allItalianterritoryextensively. • Advantages:biodegradablewaste. • Disadvantages: low energy density, needoffertilizers, variabilityof the energy production.

  8. … and remember, lessis more.

  9. Specialthanksto Luca Andreoni

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