Investigation of diesel and bio-diesel fuel deposits on a hot wall surface by using simplified method test

Mohd Tajuladnan, Mohamad Hazim (2021) Investigation of diesel and bio-diesel fuel deposits on a hot wall surface by using simplified method test. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Deposit formation is a complex phenomenon which causes various problems in the combustion chamber of an engine such as reduce the engine performance, increase the engine emissions, and cause engine damage to the diesel engine. Therefore, the aim of this study is to investigate and analyze the deposit formation of diesel and bio-diesel fuels using a simplified method known as Hot Surface Deposition Test (HSDT). In this investigation, it was carried out by dripping different types of fuel droplets which are diesel and bio-diesel (B20) fuels continuously for 3000 repetitions onto an aluminum alloy sheets with a curved surface as the hot surface plate. The hot surface plate temperature will be set at various temperature which are 250 °C, 357 °C, 450 °C and 600 °C with an impingement interval of 1 and 5 seconds. These intervals are appropriate to simulate between wet and dry condition, respectively which the impingement interval of 1 second is used for wet condition and 5 seconds is used for dry conditions. The dry condition means all volatile components of the first fuel droplet are vaporized or all non-volatile components of the first fuel droplet formed into deposits before the next impingement of the second fuel droplet occur. As for the wet condition, the second impingement of the fuel droplet occurs when the volatile components of the first fuel droplet are not completely vaporized, creating an overlapped state. Based on the results, the amount of mass fuel deposit,

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