Pädagogische Hochschule OÖ



                             W o l f g a n g     Z e c h m e i s t e r



                                  wolfgang.zechmeister@ph-ooe.at











                     Geographic-economic aspects concerning the role of energy



 (This lecture-version is without pictures and videos – the original lecture from 12th Marc 09 had
                              been with pictures an 11 short videos)

                    Prof. Mag. rer. nat.  Wolfgang Zechmeister   (PH OÖ - Linz)

                                           12. 03. 2009

                                 University of Tübingen (Germany)





                                                I. Fossil Fuels

The steam that has passed through the power station's turbines has to be cooled, to condense it
back into water before it can be pumped round again. This is what happens in the huge "cooling
towers" seen at power stations.

Some power stations are built on the coast, so they can and can affect the environment use sea
water to cool the steam instead. However, this warms the sea  ...

                                            Advantages

                                           Disadvantages

                                                I. Fossil Fuels

                                        II. Nuclear Power -
                                energy from splitting Uranium atoms

  Nuclear power is generated using Uranium, which is a metal mined in various parts of the world.
             Some military ships and submarines have nuclear power plants for engines.
Nuclear power produces around 11% of the world's energy needs, and produces huge amounts of energy
    from small amounts of fuel, without the pollution that you'd get from burning fossil fuels.

  Nuclear power stations work in pretty much the same way as fossil fuel-burning stations, except
             that a "chain reaction" inside a nuclear reactor makes the heat instead.
The reactor uses Uranium rods as fuel, and the heat is generated by nuclear fission: neutrons smash
 into the nucleus of the uranium atoms, which split roughly in half and release energy in the form
                                             of heat.
 Carbon dioxide gas or water is pumped through the reactor to take the heat away, this then heats
                                       water to make steam.
                         The steam drives turbines which drive generators.

                                            Advantages

                                           Disadvantages

                                        II. Nuclear Power -
                                energy from splitting Uranium atoms

                                         III. Solar power



                                         III. Solar power

                                          IV. Wind Power

                                            Advantages

                                           Disadvantages

                                          IV. Wind Power

                                         V. Tidal power -
                                        energy from the sea





                                            Advantages

                                           Disadvantages

                                         V. Tidal power -
                                        energy from the sea

                        VI. Hydroelectric power - energy from falling water



                                            Advantages

                                           Disadvantages

                        VI. Hydroelectric power - energy from falling water

VII. Pumped Storage Reservoirs -
storing energy to cope with big demands





                                 VII. Pumped Storage Reservoirs -
                              storing energy to cope with big demands

                                          VII. Wave power





                                          VII. Wave power

                             VIII. Geothermal - heat from underground





                             VIII. Geothermal - heat from underground

                            IX. Biomass - energy from organic materials







                            IX. Biomass - energy from organic materials

                                      Thanks for your regards



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