טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentChanin Ilya
SubjectResearch of Performance and Emissions (Emphasis on
Nano-Particles) of a Diesel Engine Fed with the
Alternative Renewable Fuel Dimethyl-
Ether (DME)
DepartmentDepartment of Mechanical Engineering
Supervisor Dr. Leonid Tartakovsky


Abstract

Dimethyl-Ether (DME) is an alternative renewable fuel and has a great potential to be a substitute of a conventional diesel fuel. DME can be easily liquefied and stored onboard. It has similar properties of storage and handling as liquefied petroleum gas (LPG).

A vast research was conducted on DME as a substitute for diesel fuel in diesel engines. However, information on impact of DME and its blends with diesel fuel on emission of nanoparticles is still fragmentary.

The purpose of this research is to study the environmental and performance implications of diesel engine feeding with DME in various blends with a conventional diesel fuel (in different weight concentration ratios), and make a comparative analysis with the baseline case of diesel fuel.

The experimental study shows that total particle number concentration of the ultrafine particles in exhaust gas is decreased drastically with the increase of DME content in the fuel blend. For example, at 75% engine load and 3,000 [rpm], total particle number concentrations decreased by 42%, 48% and 68% for DME-20 (20% DME in the blend with diesel fuel), DME-30 and DME-40, respectively in comparison to conventional diesel fuel (DME-00). The total particle mass concentration is decreased dramatically by 76%, 83% and 93% at the same engine operating mode for DME-20, DME-30 and DME-40, respectively in comparison to diesel fuel.

The study shows that at 75% engine load and 3,000 [rpm] NOx emissions of a laboratory diesel engine were drastically reduced by 53%, 62% and 67% for DME-20, DME-30 and DME-40, respectively in comparison to diesel fuel.