ALTERNATIVE ENERGY (可再生资源).ppt

Hydrogen Hydrogen is used as clean fuel for airplanes, spaceships, and vehicles. Relatively new concepts for alternative energy Algae fuel Biomass briquettes Biogas digestion Biological Hydrogen Production Floating wind farms Making Alternative Energy Mainstream Before alternative energy becomes main-stream there are a few crucial obstacles that it must overcome: First there must be increased understanding of how alternative energies work and why they are beneficial; secondly the availability components for these systems must increase; and lastly the pay-off time must be decreased. For example, electric vehicles (EV) and Plug-in Hybrid Electric Vehicles (PHEV) are on the rise. These vehicles depend heavily on an effective charging infrastructure such as a smart grid infrastructure to be able to implement electricity as mainstream alternative energy for future transportations E N D Alternative energy Offshore wind turbines near Copenhagen DEFINITION Alternative energy is an umbrella term that refers to any source of usable energy intended to replace fuel sources without the undesired consequences of the replaced fuels H I S T O R Y Historians of economies have studied the key transitions to alternative energies and regard the transitions as pivotal in bringing about significant economic change.Prior to shift to an alternative energy, supplies of the dominant energy type became erratic, accompanied by rapid increases in energy prices. 1.Coal as an alternative to wood 2. Petroleum as an alternative to whale oil 3. Alcohol as an alternative to fossil fuels  4. Coal gasification as an alternative to petroleum Common types of alternative energy 1.Solar energy 2.Wind energy 3.Geothermal energy 4.Biofuel and ethanol 5.Hydrogen Introduction Solar energy Solar energy is generating of electricity from the sun. It is split up into two types, thermal and electric energy. These two subgroups mean that they heat up homes (and water) and generat