8.1+Energy+degradation+and+power+generation

IB Physics > Energy, Power and Climate Change =8.1 ENERGY DEGRADATION AND POWER GENERATION= ** Aim 7: ** Computer simulations of Sankey diagrams feature here.
 * 8.1 Energy degradation and Power Generation || 8.2 World energy sources || 8.3 Fossil fuel power production || 8.4 Non-fossil fuel power production || 8.5 Greenhouse effect || 8.6 Global warming ||

8.1.1 State that thermal energy may be completely converted to work in a single process, but that continuous conversion of this energy into work requires a cyclical process and the transfer of some energy from the system.

8.1.2 Explain what is meant by degraded energy. Students should understand that, in any process that involves energy transformations, the energy that is transferred to the surroundings (thermal energy) is no longer available to perform useful work. 8.1.3 Construct and analyse energy flow diagrams (Sankey diagrams) and identify where the energy is degraded. It is expected that students will be able to construct flow diagrams for various systems including those described in sub-topics 8.3 and 8.4. 8.1.4 Outline the principal mechanisms involved in the production of electrical power. Students should know that electrical energy may be produced by rotating coils in a magnetic field. In sub-topics 8.2 and 8.3 students look in more detail at energy sources used to provide the energy to rotate the coils.