The mixing process in this regime is expected to be the shortest during the engine cycle. This regime corresponds to the highest value of the scalar dissipation rate (figure 1b) . In the initial phase of the fuel injection process the scalar dissipation rate does not change significantly, unless a visible heat release rate occurs. Thus, the mixing time during the fuel injection period (SOI to EOI) was assumed to be constant. The longest phase of the Diesel combustion is the diffusive combustion mode represented by regime III in figure 1a.
Since this value is very large for fossil fuels (44,800 for diesel and 46,200 for kerosene), they are an ideal fuel for cars, but also for power stations. Disadvantages of Fossil Fuels: Generally speaking fossil fuels are the most economic and efficient source of energy,
Those three aspects can be the response towards the world concerns if the utilization of gasoline fuel in a car continues in the future without any other alternative fuel to substitute it. Table 1.1 : Advantages Of Biofuel (5) Economic Aspects • Sustainability • Fuel
Using hydrogen energy can help reduce air pollution greenhouse gas emissions that are a product from the use of fossil fuels. The fact that hydrogen leakage is a big problem, on a very large, the leakage of hydrogen can be hazardous to the environment. It can also leak into the atmosphere during the production and transportation of the gas. Hydrogen can increase climate effects, cause ozone depletion in the atmosphere and increase the lifetime of
Fossil Fuels Definition: Fossil fuels are basically compounds of hydrogen and carbon. They are deposited inside the earth . They are formed due to decomposition of remains of buried living organisms by a bacteria in absence of oxygen. Introduction:Fossils of living organisms are the source of fossil fuels. Actually they were formed millions of year ago so that is why they cannot be recycled .Carbon and hydrogen are main component of them.
Future possibilities and environment benefits, there’s a study that it lessen the air pollution by using it. Abundant domestic production, increased resale value and more affordable maintenance. As evidenced in the Environment Protection Agency, natural gas as the cleanest fossil fuel was used in many ways to help reduce the emissions of pollutants into the environment. Burning natural gas than other fossil fuels emits fewer harmful pollutants and increase the reliance on potentially reduces emission of those many harmful pollutants. The use of natural gas does not significantly contribute in the formation of the smog as it emits lower nitrogen oxide and doesn’t have particulate matters.
It will also virtually eliminate sulfur oxides and sulfates which are major contributors to acid rain. Nitrogen oxide emissions may somewhat increase, but can be remedied with newer low-emission diesel engines. Usage of biodiesel will allow a balance to be sought between agriculture, economic development and the
IS BIODIESEL A VIABLE ALTERNATIVE TO DIESEL FROM FOSSIL FUELS FOR TRUCKS AND BUSES? Introduction Biodiesel are a viable alternative to diesel from fossil fuels for trucks and buses engine, this is because they are renewable sources of energy and they are also more ecologically friendly compared to fossil fuels. However, there are major disadvantages for using biodiesels, this includes the “Food Verse Fuel” debate and they also produce more NOx pollutants than compared to diesels and other fossil fuels. However even though being a renewable source of fuel, the most abundant source of biodiesels comes from industry. The conversion of this oil from biodiesels costs a lot of money because it requires the raw oil to be cleansed and also these oils
The EPA and other environmental friendly organizations understand that this pollutants are a problem. At this time, it is not realistic to completely deviate from using gasoline and diesel engine based automobiles because society is extremely dependent on it to function and would need a transition period to move away from it. There have been new innovations that deviate from gasoline and diesel based engines to automobiles that use electricity, batteries and other eco-friendly energy sources. There has also been an effort to improve the quality of the exhausts and engines that use gasoline in other to reduce the toxicity of the exhausts being emitted by the engines.^6 this approach though not a permanent solution is a step in the right direction to reduce the number of pollutants emitted into the atmosphere. For the solution section of this paper, the first suggested solution seeks to set a base for a transitory period into the second solution which is a more permeant