RENEWABLE ENERGY RESOURCES . FOSSIL FUELS, ELECTRICITY PAST PRESENT & FUTURE. Key Words. Energy – being able to do work. e.g. food gives us energy, so that we can move Fuel - Fuel is anything that is burned or altered to obtain energy. Fuel gauge. Energy.
RENEWABLE ENERGY RESOURCES
FOSSIL FUELS, ELECTRICITY
PAST PRESENT & FUTURE
burned or altered to obtain energy
“Some 2 billion people lack access to electricity and rely on traditional fuel sources such as firewood, kerosene, or biomass for their cooking and heating.”
World electricity generation by energy
Fossil fuels 63%
Generation & Distribution
(US Energy Information Administration, 2004)
Fossil fuels are coal, oil and gas
Coal oil and gas
dead plants and animals over
millions of years.
Comparison of Air Pollution from the Combustion of Fossil Fuels (kilograms of emission per TJ of energy consumed)
Integrated gasification combined-cycle (IGCC)
It is a family of methods for capturing and permanently isolating gases that could contribute to global climate change.
CARBON DIOXIDE SEQUESTRATION
Why Natural Gas?
HEAT EXCHANGE WITHIN EARTH SYSTEMS
Substitute 1400 natural gas electric plants for an equal number of coal-fired facilities
Photo by J.C. Willett (U.S. Geological Survey).
Triple the world’s nuclear electricity capacity by 2055
Graphic courtesy of NRC
Install 20,000 square kilometers for dedicated use by 2054
Photos courtesy of DOE Photovoltaics Program
Install 1 million 2 MW windmills to replace coal-based electricity,
Use 2 million windmills to produce hydrogen fuel
Photo courtesy of DOE
turns a generator to produce electricity
How it works:
and thus drive generators to produce electricity.
Hydro-electric power is renewable. The Sun provides the water by evaporation from the sea, and will continue to do it.
Tidal energy isrenewable. The tides will continue to ebb and flow, and the energy is there for free.
Biofuels & Biomass
Scale up current global ethanol production by 30 times
Photo courtesy of NREL
Biomass isrenewable, as we're going to carry on making waste products. We can always plant and grow more sugar cane and more trees, so those are renewable too.
How it works
Energy Storage Systems
“ The path to the future is neither as rosy as some people hope nor as thorny as others fear, but depends on how effectively we pick out the weeds and nurture the bush as we walk ”