International Journal of Scientific & Engineering ResearcH

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INTRODUCTION 

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The conventional boiler which runs on the combustion of diesel fuel has been around for two century. The external combustion engine has a huge role in generating steam in a power plant for its speed, high efficiency and the low cost to run [1]. The diesel combustion fuel is industry’s leading prime mover, and will likely remain so for a foreseeable future. To keep using this fuel it has become imperative to improve the fuel consumption and emission characters [2].
Iraqi diesel fuel is characterized by its low cetane number (about 49) and high sulfur content [3]. Several research articles treated this dilemma from several directions as adding metha-nol and ethanol to diesel [3]. Other attempts like adding bio-diesel fuels to diesel [4]-[5], using an alternative way to run the engine like Partially-Premixed (PPCE) [6] or adding gases like hydrogen or natural gas in dual-mode operation [7]-[8]-[9]-[10] were conducted.
Many of experimental studies presented evidence of the bene-fits of magnetic treatment which will enhance the fuel econo-my and reducing exhaust emission. Sanderson [11] showed a method and apparatus for treating liquid fuel in external com-bustion engine by passing it through a magnetic field before mixing it with air in the burner. Fatih & Saber [12] experi-ments revealed that the magnetic effect on the reduction of the fuel consumption was up to 15%, CO concentration reduction was up to 7%. The reduction of NO emission was up to 30%. The reduction of CH4 was up to 40%. The experiment of Faris et. al. [13] comprised the using of permanent magnets with deferent intensities of (2000, 4000, 6000, 8000) Gauss, which were installed in the fuel line of two-stroke engine and study of its impact on gasoline consumption, as well as exhaust gas-es for comparing purpose. The result necessitated conducting some experiments without the use of magnets. The overall performance and exhaust emission tests showed a good out-come, where the rate of reduction in gasoline consumption ranged between (9-14%), and the maximum reduction value at the rate of 14% was obtained using field intensity of 6000 Gauss, as well as the field strength of 8000 Gauss. It was found that 30% and 40% decrements were the percentage of exhaust gas components (CO, HC) respectively, but CO2 percentage increased up to 10%.
Al-Dossary [14] studied the effect of magnetic field on internal combustion engine with unleaded gasoline and found that the effect of magnetic field on CO was the most significant at most engine loads and speeds.
Allawi [15] described the reduction of fuel consumption by using magnetic field, to ensure the complete combustion. This leads to higher maximum thermal efficiency and reduction of emissions by subjecting the fuel to force the magnetic flux of the magnet installed at the entrance of the of fuel manifold, leading to more efficient combustion. From the experimental results, a reduction in the fuel con-sumption (L/h) in compression ignition engine (C.I. engine) was obtained up to (3%), and in brake specific fuel consump-tion (bsfc) up to (2.877%) while the brake thermal efficiency raised by about (3%). The exhaust gas emissions showed a reduction nearly by (13.8 %) of CO, (7.8 %) of CO2 and (10.8%) of HC. Patel et.al [16] studied the effect of magnetic field on the engine performance parameters such as specific fuel con-sumption; break thermal efficiency, exhausts emissions by applying the magnetic field along the fuel line immediately before fuel injector. The strong permanent magnet of strength 2000 gauss is applied to fuel line for magnetic field. The exper-iments are conducted at variable engine load conditions. An exhaust gas analyzer is used to measure the exhaust gas emis-sions such as CO, CO2, HC and NOx. With the application of magnetic field the reduction rate in fuel consumption was about 8% at high loads, the reduction in HC and NOx were about 30% and 27.7 % respectively. The CO emission reduced with the application of magnetic field at high loads. The re-duction in CO2 emissions was about 9.72% at average of all loads by applying a magnetic field. The aim of this paper is to examine the effect of the magnetic field on Iraqi diesel fueled a burner of the boiler and its impact on the fuel consumption as well as emission of exhaust gases.
IJSER International Journal of Scientific & Engineering Research, Volume 7, Issue 2, February-2016 407 ISSN 2229-5518 IJSER © 2016 http://www.ijser.org