Abstract
The present work aims to design and investigate the performance of diesel fuel heating system called Preheater Water System (PWS). The PWS is made of stainless-steel container, copper spiral pipe and electric heater. The container has a diameter of 140 mm and height of 170 mm. The tube has a diameter of 8.5 mm. This system heats the diesel fuel before entering the fuel injector pump. The system utilizes heat from the heat from radiator cooling water and also uses additional electrical heating. The system is equipped with temperature sensor to measure the diesel fuel entering the fuel injector pump. The results show that at engine speed of 800 rpm (idle condition), temperature of the fuel increases 55°C, fuel consumption is 26% more efficient. At medium speed of 1200 rpm, the temperature increases up to 55°C and fuel consumption is 15% less. Meanwhile at the engine speed of 2200 rpm, the temperature rises to 60°C and fuel consumption increases up to 15%. In can be conclude that the PWS works well and the optimum temperature of the diesel fuel is 50°C.
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