Different lasers use different materials as the active medium. The medium can be either solid, liquid, or gas, and there are advantages for each in the amount of energy that can be stored, ease of handling and storage, secondary safety hazards, cooling properties, and physical characteristics of the laser output. (more…)
There are literally thousands of uses for lasers. One of the largest applications is telecommunications—sending a signal throug ...
The word “laser” is an acronym for “light amplification by the stimulated emission of radiation.” Lasers of all kinds consist o ...
The first known laser was made by Theodore Maiman at Hughes Research Laboratories in Malibu, California, in 1960, but the seeds ...
Several molecular systems have been constructed that mimic various aspects of photosynthesis. Two of these utilize molecular system ...
It is known that laser printers print faster, but swallow a large amount of energy, even if the printer is in the energy saving ...
At present, in the United States and worldwide, motor vehicles are fueled almost exclusively by petroleum based gasoline (or reformulated gasoline) and diesel fuels. Since the first oil price shock in 1973, efforts have been made to seek alternative fuels to displace gasoline and diesel fuels and achieve energy and environmental benefits. Some of the alternative fuels that have been researched and used are liquefied petroleum gas (LPG), compressed natural gas (CNG), liquefied natural gas (LNG), methanol (MeOH), dimethyl ether (DME), Fischer– Tropsch diesel (FTD), hydrogen (H 2 ), ethanol (EtOH), biodiesel, and electricity. Production processes associated with gasoline, diesel, and each of these alternative fuels differ. (more…)
There are different types of vehicle propulsion systems and the transportation fuels that have been studied for their potential ...
Gasoline is used mainly by cars, motorcycles, and light trucks; diesel is used mainly by heavier trucks, buses, and trains. Togethe ...
The energy efficiencies of various fuel production pathways from well to pump. The efficiencies shown are defined as the energy ...
The United States depends heavily on imported oil to fuel its transportation infrastructure. The use of alternative fuel derive ...
Most alternative fuel vehicles on the road today were originally designed for gasoline, but converted for use with an alternative f ...
There are different types of vehicle propulsion systems and the transportation fuels that have been studied for their potential to power the vehicles. Gasoline, CNG, LNG, LPG, methanol, ethanol, and hydrogen can be used in vehicles equipped with conventional spark-ignition (SI) engines. Interest in developing efficient, low-emission, spark-ignition direct-injection (SIDI) engine technologies has heightened in recent years. (more…)
The combination of well-to-pump results and the energy use and emissions associated with vehicle operation (also called the pum ...
It shows Well-to-Wheels Greenhouse Gas emissions of the 23 vehicle/fuel systems. For each system, the bottom bar represents CO2 ...
The spark-ignition and compression-ignition engine and internal combustion engines technologies that are currently employed in ...
The commercialization prospects for fuel cell vehicles depend not only on their performance and cost, but also on how well th ...
At present, in the United States and worldwide, motor vehicles are fueled almost exclusively by petroleum based gasoline (or re ...
The commercialization prospects for fuel cell vehicles depend not only on their performance and cost, but also on how well they can compete with other technology options that address similar market and policy needs. While market forces have not traditionally motivated design change for reasons of environmental performance, customer values and expectations can evolve and such characteristics could grow in importance. However, inherent market conservatism will favor less disruptive ways to address evolving needs, which might be met by improved gasoline and diesel vehicles, including hybrid-electric versions. Yet looking over the long run, particularly the need to substantially reducing greenhouse gas emissions, hydrogen fuel cells may well provide a solution that is superior to other alternatives. (more…)
The primary electric drivetrain components for fuel cell vehicles are the same as those for any electric vehicle: traction motors, ...
Most alternative fuel vehicles on the road today were originally designed for gasoline, but converted for use with an alternative f ...
A fuel cell is an electrochemical device that directly converts a fuel to electricity by means of reactions on the surfaces of ...
There are different types of vehicle propulsion systems and the transportation fuels that have been studied for their potential ...
The most commonly researched and most developed application of using hydrogen as a fuel source is in conjunction with a hydrogen fu ...
One study that does address the peak-oil scenario directly is a 2005 report conducted for the National Energy Technology Laboratory (NETL) entitled “Peaking of World Oil Production: Impacts, Mitigation, and Risk Management” (Hirsch, et al., 2005). This study acknowledged the risk of the peaking of world oil production and investigated strategies to mitigate the impacts. Because NETL is the government’s primary fossil energy research lab, it is not surprising that the report concludes that the way to solve our looming liquid fossil fuel problem is . . . with more fossil fuels. (more…)
Nuclear fission and fusion Research and Development continues to account for nearly half of the total spending by IEA countries, al ...
Transportation is another sector that has increased its relative share of primary energy use. This sector has serious concerns ...
Options for dealing with the threats of climate change include both adaptation to inevitable changes and mitigation, or lessening, ...
ITMA Foundation, a group of researchers formed by Javier Belzunce, José Manuel Artimez, Ana Moran and Ruben Coto, has developed the ...
Do we have the resources? Rudolf Diesel developed the diesel engine which ran on biodiesel vegetable oil in the late 1800s. At the ...
Estimation of the future technical potential of biomass as an energy source is dependent on assumptions with respect to land availability and productivity as well as conversion technologies. With the emergence of energy crops as the major source of biomass fuel, land use conflicts, especially in relation to food production, may arise. However, with efficient agricultural practices, plantations and crops could supply a large proportion of energy needs, with residues playing a smaller role without compromising food production or further intensifying agricultural practices. (more…)
The future development of energy crops, to the level at which they would replace residues as the major bioenergy fuel source, will ...
Bioenergy produced from biomass is sometimes called a carbon-neutral energy source, because the same quantity of carbon released wh ...
The quantification of the actual reduction in green house gases sourcess emissions resulting from the substitution of fossil fu ...
To date, most discussion and research relating to the various of biomass role in mitigating CO2 emissions has been focused around i ...
Over the last decade, the number of countries researching the potential of biomass and bioenergy for energy services rose rapid ...
It shows Well-to-Wheels Greenhouse Gas emissions of the 23 vehicle/fuel systems. For each system, the bottom bar represents CO2 -equivalent emissions of CO2 , CH4 , and N2O, combined with their greenhouse global warming potentials (GWPs). The top bar represents CO2 emissions only. For the two ethanol pathways (corn and cellulosic ethanol), there are some negative emissions. They represent carbon uptake during biomass growth. The carbon is eventually emitted to the air during ethanol combustion air. (more…)
The combination of well-to-pump results and the energy use and emissions associated with vehicle operation (also called the pum ...
There are different types of vehicle propulsion systems and the transportation fuels that have been studied for their potential ...
The spark-ignition and compression-ignition engine and internal combustion engines technologies that are currently employed in ...
The fuel cycle for a given transportation fuel includes the following processes: energy feedstock (or primary energy) product ...
The energy efficiencies of various fuel production pathways from well to pump. The efficiencies shown are defined as the energy ...
If you are not up-to-date with scientific developments, you probably have not have heard of the process of converting gas to liquids. It might not sound like it could apply to many people, but in fact it should appeal to everyone. This newer method of using our natural resources to our advantage could be the key to less reliance on foreign energy sources, resulting in lower natural gas prices. (more…)
Anyone who wants to save money on gas should be interested in the process of underground coal gasification, or UCG. It is an al ...
Natural gas is found mainly in underground reservoirs and in coal beds. Natural gas is a fossil fuel that consist primarily of ...
At present, in the United States and worldwide, motor vehicles are fueled almost exclusively by petroleum based gasoline (or re ...
Coal is an important energy source and energy consumption in United States as well as worldwide. It will remain so for many yea ...
The gradual change in the energy consumption pattern of the United States from 1860 to 1990. In the mid-1800s, biomass, princi ...
The internal combustion engine has dominated the car and light-truck market for over 100 years. Although remarkable improvements have been made over the past 30 years to reduce air pollution problems to nearly zero and to almost double vehicle efficiency, increasing concerns about global warming and energy security are pushing vehicles toward even greater energy efficiency improvements. (more…)
Fuel cell vehicles are being developed because they promise to meet the requirements expected of automobiles in a market increa ...
The leading automotive brands are being focused to produce electric vehicles because they believe they represent a harmony to the e ...
The primary electric drivetrain components for fuel cell vehicles are the same as those for any electric vehicle: traction motors, ...
Mercedes-Benz presented at Geneva Style F800 Concept (the F stands for Mercedes: technology, design and art), a prototype that ...
A fuel cell is an electrochemical device that directly converts a fuel to electricity by means of reactions on the surfaces of ...