Abstract
More than 400,000 tons of wastes cooking oil a year are estimated to throw out. Part of them is thrown out to sewage line and then causes water pollution of rivers, lakes and oceans. Using the recycled cooking oil as fuel of engines would be a simultaneous solution of two big problems of the water pollution and energy saving including the reduction of CO_2. In this study, combustion observations of waste cooking oil were made to design a suitable combustion system of a heat-insulated engine fueled with the oil using a rapid compression and expansion machine.
