Renewable Energy Sources 1A2 Geography 29th September 2014 Topics for today’s class… • Why do we need to develop renewable sources of energy? • How many types of renewable energy sources are there? • Which is the most popular source of renewable energy in Ireland? • Will we be getting homework today? Why do we need to develop renewable sources of energy? • • • • • Electricity generated by burning fossil fuels. Coal, peat, oil and gas. Finite/ non-renewable. Conserve fossil fuels Make greater use of renewable energy resources. • Environmental benefits How many types of renewable energy sources are there? • Several, including: Hydroelectric Power (HEP) Solar Energy Geothermal Energy Tidal Energy Wind Energy Hydroelectric Power • Force of falling water turns turbines – generating electricity. • Examples include Inniscarra Dam. • 1953 • ESB • 19 MW Solar Energy • Heat. • Light. • Captured by solar cells in solar panels. • Electricity Geothermal Energy • Water heated when pumped deep into Earth’s crust. • Pumped back to surface – heats homes. • Steam turns turbines – generating electricity. • Iceland. Geothermal Energy Iceland • http://www.youtube.com/watch?v=XRAQrDd uaU0 Tidal Energy • Tides rise and fall. • Turbines turn. • Electricity generated. Which is the most popular source of renewable energy in Ireland? • What do you think? Wind Energy • Moving wind turns turbines – electricity generated. • Popular. • Turbines very big. • “Wind Farms.” • Built out at sea – windy, prevents visual pollution. • Many examples in Ireland. Homework • Page 23. • Question 6, parts (i) (ii) & (iii). • To be completed for tomorrow’s class.