ココナッツ油メチルエステルを着火燃料として用いた二元燃料ディーゼル機関の燃焼特性(熱工学,内燃機関,動力など)

概要

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In order to reduce the emissions of a dual fuel diesel engine fuelling biodiesel as an ignition fuel, the combustion characteristics and exhaust emissions of the dual fuel with coconut oil methyl ester and CNG (C_<CNG>) are investigated by comparing to the dual fuels with rapeseed oil methyl ester/CNG (R_<CNG>) and JIS no. 2 gas oil/CNG (G_<CNG>). The results show that the operable condition of C_<CNG> is almost the same as that of R_<CNG> and G_<CNG>. The dual fuel diesel engine with C_<CNG> can be operated when the equivalence ratio of the intake premixed CNG is about 0.1 to 0.49. The thermal efficiency of C_<CNG> is almost the same as that of R_<CNG> and G_<CNG>. C_<CNG> has lower smoke emissions compared with R_<CNG>. It is concluded that coconut oil biodiesel can be used as an ignition fuel on dual fuel diesel engines.
2009-08-25