alternative fuel.ppt
TRANSCRIPT
Alternative Fuel the term “ alternative fuel “ usually refers to a source of which energy is renewable
the main purpose of fuel is to the store energy , almost all fuels are chemical that store chemical potential Energy. usually in the form of heat for variety of applications,such as powering an engine or heating a bulding.
BiodieselEthanolButanol,chemically
stored electricity ( batteries and fuel cells
)
HydrogenMethaneNatural gasWoodWood gasVegetable oilBiomas andPeanut oil
Gasolyn type biofuels Butanol,as direct re –
placement for gasoline.
Hydrogen internal –
combustion car. E85 – 15% gasoline
85% ethanol blend.
Gasoline type biofuel Hempseed oil fuel or
other straight vege –
table. Biodisel.
In the year 2000,there were about eight million vehicles around the world that ran on alternative fuels,indicating the incre- asing popularity of alternative fuels. There is growing social interest,and an economic and political need for the development of alternative fuel source A primary concern is that the fact that the use of conventional fuels directly contributes to the Global Warning Crisis.
Natural gas- compressed or liquified. Autogas ( LPG,LPgas,Propane ). Synfuel – synthetic fuels. Plug – in hybrid electric vehicle.
Steam engine cars
Coal – oven steam
cars.
Organic waste fuel.
Wood gas on board
gasification.
Electric vehicle.Solar cell-powered or
charged electric cars.Hydrogen fuel cell
liquefied or compressed hydroMAGLEV,with induction
drive ( a variety of electric mass
transit ).Air car,working on compressed air.
Nuclear powered. Rubber band ( stored
energy ). Spring power or
“ wind-up car “ ( stored elastic energy ).
Wind-powered sail cars.
Non conventional oil is
another source
of oil separate from conventional
or traditional
oil sources
include :
Tar sands
Oil shale and
Bitumen
FT process convert carbon dioksida (CO2 )
carbon monoxide (CO),access to
crude oil supplies. It used
today in South Africa
to produce most
of that
country,s diesel from Coal.
Fast breeder reactor are another possibility,as opposed to current LWR
(light water reactor ) which burn the rare Isotope of uranium U-235 ( producing and burning about an amounts of plutonium in the process ).Produce much larger amounts of
plutonium from common U-238 than fission that to produce electricity and thermal heat.
It is relatively easy to start nuclear fusion reactions,which generate large amounts of
energy (cf.thermonuclear weapons).However,to achieve controlled and sustained fusion requires a large amount to obtain the required high temp
electromagnetic confinement.The technology has not yet been developed to
maintain a significant energy gain.
Hydrogen for use as fuel must first be pro- duced using another energy source.One existing method of hydrogen production is steam methane reformation:however,the most common source of methane is natural gas,which is short
supply.Another method of hydrogen production is through electrolysis of water which uses electricity generated from any source,or combination of : fossil fuel,nuclear,and/or renewable energy sources.Biomas or coal
gasification,photoelectrolisis,and genetically modified organisms have also been proposed as means to produce hydrogen.
Liquid Nitrogen.
A liquid nitrogen economy would extract energy from the temperature difference between air and liquid nitrogen.The stirling or engine or cryogenic heat engine offers a way to power such vehicles. A means to generate liquid nitrogen,which is only an energy storage medium,is needed.
Nuclear engineers estimate that the world could derive 400,000
quads ( quadrillon,1015 British thermal units ),or about 420,000
EJ ( Exajoules = 1018joules )of energy ( 1000 years at current levels of consumption,
assuming new technology ) from uranium isotpe 235,if reprocessing
is not employed.As uranium oresupplies are limited,a majority of
this uranium would have to some how be cost- effectively extracted from sea water.But, this technology does not
exist.How ever,at the current technology and consumption,the reserves will last 50 years.