טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentFlor Avner
SubjectUse of Gas as Alternative Fuel for Vehicles in Israel
DepartmentDepartment of Mechanical Engineering
Supervisors Professor Emeritus Yoram Zvirin (Deceased)
Dr. Marcel Gutman


Abstract

Air pollution from road transport is a severe worldwide problem. In Israel, the problem is rapidly augmented, especially in the city centers. This results from rapid increase of the rate of motorization and the lack of adequate traffic infrastructure, relatively high mean vehicles age, rather poor maintenance conditions, Israeli climate conditions, fuels quality, topographic conditions, etc. In this context, it is necessary for Israel to find solutions, for the reduction of transport pollution, including the use of alternative fuels.


The main objective of the research work was to study the possibility of using gas fuel as an alternative for the Israeli transportation fuel market. The work was focused on the substitution of a part of the conventional automotive fuels (gasoline and diesel fuels) by (LPG and/or CNG).  The work underlines that it is necessary to perform a demonstration, before a decision regarding new strategies of introducing alternative fuels is made. For this, design principles have been developed for a fleet test with gas fueled vehicles, to determine the main parameters which will be taken into consideration from the technical, environmental, and economical points of view, adequate for Israel, in order to establish the strategy for introducing gas-powered vehicles in Israel.


A comprehensive literature survey was carried out, on gas fuels, gas engines, fuel systems and infrastructure for refueling, special safety requirements, energetic and environmental implications, cost considerations, etc.


The gas vehicles fleet test (demonstration) program is based on a detailed experimental procedure. It includes criteria for selecting vehicles and routes (driving cycles), measuring methods and systems, analysis and assessments of the results, etc. The method which has been developed allows analyzing the findings by comparing the gas vehicles’ engines performance with that of gasoline and diesel engines, including aspects of pollution, fuel consumption, noise emission, maintenance, operational costs, etc. The results will serve as a tool for the authorities, enabling them to take appropriate decisions about the use of gas as automotive fuel in Israel.