Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Diesel Fuel

Experimental and Theoretical Study for the Effect of Diesel Fuel Quality Produced in Iraq on Ignition Delay Period

Saadi Turied Kurdi; Hassan Abad al-wahab Anial; Hussein Ahmed Abd Yaqoob

Engineering and Technology Journal, 2016, Volume 34, Issue 12, Pages 2258-2271

An experimental and theoretical investigation to evaluate the effect of diesel fuel produced in Iraq and blended with ethanol of four stroke single cylinder direct injection diesel engine was conducted. This study focused on the development of an empirical ignition delay equations based on engine experimental data and to analyse the dependency of ignition delay on equivalence ratio, engine brake power fraction, effect of engine speed, and cetane number .The experimental measurements was performed at compression ratio of 22:1 at engine speed ranging from 1100 to 2600 rpm with an increment of 500 rpm, and engine torque ranging from 2 to 10 N.m with an increment of 2 N.m. The experimental data from engine during test have been saved on the computerized program (ECA 100, VDAS) connected to the unit.The results show that the empirical equations of delay period are resulted as a function of ignition pressure, ignition temperature, fraction brake power with better agreement with the experimental data than an empirical equations of delay period which are resulted as a function of ignition pressure, ignition temperature, equivalence for all fuels at all speeds. E0 Basra has the highest value of the cylinder pressure with low speed at variable torque. E10 blended fuel has recorded the lowest value of ignition delay period in all speeds. The experiments also show that the ignition delay period has been found to be decreased with increase of cetane number, ignition pressure, ignition temperature, equivalence ratio, and the fraction brake power.

To Prepare Special Formula to be Used as Diesel Fuel

Taghreed M. Hameed; Laith Hamzah Thuaban; Seham Mzher; Aqeel Talip Jafar; Wurood Ali Aboud

Engineering and Technology Journal, 2013, Volume 31, Issue 18, Pages 1-10

The basic idea for this research is summarized in preparing special formula consisting of cut hydrocarbon petroleum with pure water and a combination of surface tension materials and the formula prepared in the form of emulsion (diesel-water) which is being stabilized in storage temperature and at temperatures and colliding pressure during use .The prepared emulsion is used in the interior combustion engines to increase the efficiency of fuel and reducing of toxic gases emissions and contaminated particles.
Iraqi diesel fuel product in" Daura Refinery” was selected and the emulsion was prepared by mixing with gradual addition of water to the diesel containing small amounts of (surface- tension) material. In this research variables and optimum conditions of preparation and their impact on stability were studied such as water/diesel ratio, concentration of surfactants, mixing periods and mixing speeds. The physical properties of formula prepared were measured such as density, viscosity and surface tension. The results show that the optimum conditions of preparation were: 5% water/diesel ratio; 0.2% concentration of surfactants; 3 min. mixing period and 4000 rpm mixing speed.