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Renewable alternative energies sources

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    Renewable alternative energies sources- such as solar water and biomass that are more or less continuously made available in a tim from work useful to people nonrenewable alternative energies- energy sources including nuclear and geothermal that are dependent on fuels or a resource that may be used up much faster than it is replenished by natural processes bio fuel- an energy recovered from biomass- organic matter such as plant material – animal waste digestion- poop (waste ) “digested’ by microorganisms to make methane solar thermal

    Passive- architectual designs that enhance absorbation of solar energy by using and adjusting for natural changes that occur throughout the year, w/out mechanical power. Active- requires mechanical power to circulate air, water, or heat is stored until used, ex. pumps etc. Solar collectors- provide space heating or hot water are usually flat parts consisting of a glass covered plate over a black background where an absorbing fluid is circulated throug tubes. solar radiation enters glass + is absorbed by black background Heat is emitted from black material heating fluid circulating in tubes. Phytovadtaic cells- made of thin layers of semi conducts when sunlight hits cells,electrons flow at through wires =energy power tower- collects heat from solar energy and delivers it in form of system to turbines that produce electric power two options: electrolysis (using electricity currents to separate H from H2O requires electricity; or thermal process in which steam combined with natural gas (CH4) remove © leaving (H) depends on fossil fuels + releases some CO2; H can also be produced by gasification of biomass doesn’t depend on conditions (like solar and wind) can be stored in batteries -small scale- designed for individual homes farms small industries – site specific -lare scale big domes pumps turbines

    pros: clean power, no fossil rules, doesn’t pollute atmosphere, produces no radio active waste, is efficient
    cons: flood large areas that could have had other uses; block migration of fish; water falling may pick up NG which mild fishes; dam strap sediment which sand on beaches; people don’t want to turn wild rivers into lake; large surface area ups evaporation. dam built across entrance to bay or estuary as tide rises, dam blocks water then lets it go , turning turbine, when tide stats to go down,wall blocks it, then lets it go, spins turbine limits = site specific, kill birds, use large areas of land , degrade areas of scientific resources advantages- relatively low environmental impact, continued use in certain -wind spins turbine which generates electric it, world leaders = us,germanny, European direct burning to produce electricity or heat H2O and air ; heating of biomass to form gaseous fuel (gasification); and distillation to produce biofuels like ethanol , biofuels, biodiesel or methane -polution and degradation of land, burning air pollution pressure on used resources, cost of growing.. site specific-steam turns turbine, or H2O used to heat or cool a house

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