Morphological analysis of injected sprays of different bio-diesel fuels by using a common rail setup controlled by a programmable electronic system

High fuel efficiency with good fuel economy and low carbon monoxide and hydrocarbon emissions are the essential features that are widely used in light, medium and heavy duty applications. However, high emissions of nitrogen (NOx) oxides and particulate matter (PM) is a major challenge and sometimes perplexing. Researchers have tackled the issues on multi-cylinder engines by adopting the common rail fuel injection systems which employs a multiple injection technique. The present work aims at utilising this for a single cylinder diesel engine. To study its efficacy, a numerical analysis by developing a quasidimensional computational model and coupled with thermodynamic considerations to model heat release rates and emissions of NOx and soot. For this purpose, a computer code was developed in C ++ and validated with the experimental results. Then a split technique was incorporated into the model. It is noted that for a case of 75 (8)

Section: Effective Abatement Of Diesel Engine Emissions With Split Inmentioning

confidence: 96%

Effective abatement of diesel engine emissions with split injections

Ravichettu¹,

Rao²,

Murthy³

2017

“…The preheating of biodiesel at different temperatures reduces the viscosity and surface tension which enhances better fuel injection, improves mixture formation, and thereby better fuel atomisation. From the fuel properties, viscosity can affect fuel flow rate and cause poor fuel atomisation during the combustion process [9][10][11][12]. The use of biodiesel or its blend has effects on fuel droplet formation, vaporisation, and airfuel mixing process due to its higher viscosity [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Performance and emissions of diesel engine fuelled with preheated biodiesel fuel derived from crude palm, jatropha, and waste cooking oils

Khalid¹,

Tajuddin²,

Jaat³

et al. 2022

Biodiesel is typically made by chemically reacting lipids of palm, vegetable, and waste cooking oils and animal fat with an alcohol producing fatty acid esters. Biodiesel is not efficient in cold weather and this is biodiesel's major problem. Viscosity has influences on the fuel flow rate and leads to poor fuel atomisation during the combustion process. The aim of this study is to determine the effects of biodiesel temperature in the range fom 40 °C and 60 °C on engine performance such as torque, brake power, brake mean effective pressure, and fuel consumption. Three types of biodiesel oil were used (crude palm oil (CPO), waste cooking oil (WCO), and jatropha oil) under biodiesel blending ratio of 5vol%. A single cylinder four-stroke engine was used and operated under different load conditions of 0% and 50% and observed emission of CO, CO2, NOx, and HC. The engine operated at 0% and 50% dynamometer load conditions and running speeds of the engine of 800 rpm, 1200 rpm, 1600 rpm, and 2000 rpm. The results of this study showed that the heating temperatures in the range from 40 °C and 60 o C in CPO10 produced the highest brake power as well as torque and BMEP. For the experimental results of exhaust emission, the preheated temperature affected the degradation of the exhaust emission. In addition, preheated biodiesel increased the pressure on the cylinder combustion chamber. It can be concluded that the biodiesel preheated blend influences the performance and emission. For CPO biodiesel, the preheated biodiesel decreased CO and NOx while the standard diesel produced the lower emission of CO2 and HC. WCO biodiesel blend produced a lower emission with increasing fuel temperature.

“…Countries in other regions face severe crisis in bridging the gap between energy demand and fuel supply [2]. Fossil fuel combustion also results in air pollution, acid rain, and build-up of carbon dioxide, thus putting human beings and the environment at risk [3][4][5][6][7]. Among the alternatives to fossil fuels, biofuels such as biogas, alcohols, and biodiesels have received considerable attention due to their renewable nature and their inherent potential to bring down net CO2 emission [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

A review on the purification and use of biogas in compression ignition engines

Feroskhan¹,

Ismail²

2022

Biogas is commonly produced during the decay of organic matter. It is a mixture of methane and some non-combustible gases such as CO2 and H2S. Its viability as a renewable alternative fuel for internal combustion engines can be enhanced by methane enrichment, i.e. removal of the non-combustible constituents. One of the common techniques for using biogas in a compression ignition (CI) engine is to mix it with air in the intake manifold, induct, and compress this mixture and ignite it by injecting a small quantity of diesel or bio-diesel, which is termed as the pilot fuel. This is known as the dual fuel mode. The pilot fuel is injected close to the end of the compression stroke as in a conventional CI engine and the injected fuel quantity depends on the operating condition. An alternative approach is the Homogeneous Charged Compression Ignition (HCCI) mode. Here, a homogeneous mixture of biogas and air is inducted and compressed by the piston until it auto-ignites. While this concept combines the benefits of spark ignition (SI) and CI engines, the onset of combustion cannot be controlled directly. A detailed review of recent research pertaining to biogas purification techniques and operation of CI engines with biogas in dual fuel and HCCI modes is presented in this paper. The effects of various operating parameters on engine performance and emissions, and comparison with conventional diesel fuelled CI engines are discussed. Biogas improves combustion efficiency, NOx, and smoke emissions. However, it reduces brake thermal efficiency, volumetric efficiency, and increases HC and CO emissions. Biogas fuelling of CI engines is recommended for achieving high diesel substitution, especially under high torque operation.