中速ディーゼル機関における低質油の燃焼試験

概要

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According to the recent forecast of a major oil company, the bunker fuel primarily used today, which is based on residual oil from atmospheric distillation, will be replaced in future by that based on residual oil from a thermal cracking process. This report gives the details of an experimental investigation carried out on a four-stroke medium speed diesel engine using degraded fuels. Fuels used for the investigation were as follows: 1. Standard Bunker Fuel - ordinary bunker fuel; used as a reference fuel 2. Degraded Bunker Fuel - based on visbreaker bottom oil 3. Degraded Bunker Fuel - based on fluid catalytic cracked bottom oil 4. Degraded Bunker Fuel - fuel which had caused excessive wear on the piston rings of a low speed two-cycle diesel engine in service. 5. Coal Tar - made by extracting light oil from crude coal tar obtained as a by-product from a coke furnace. Results showed that no major difficulties arose when degraded bunker fuels were burned in a marine diesel engine, notwithstanding the complicated combustion mechanism. However, since the results were obtained from a short term bench test, the authors were unable to determine the long term reliability and durability of marine diesel engines running on degraded fuel.
社団法人日本マリンエンジニアリング学会の論文