船体および推進器の汚損が推進性能に与える影響-II

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This paper deals with the analyses of many complex variables , which θp(deg.) is propeller pitch angle ; Np(rpm), revolution of propeller ; V(kt), ship speed ; G(kg/h), fuel oil consumption ; Ne(ps), shaft horse power and S(%), propeller slip, based on the service performance of Engine Log-Books of T/V Kakuyo-Maru, Faculty of Fisheries, Nagasaki University, from 1999 to 2001.Following results were obtained. 1) V3/G, fuel oil consumption coefficient was expressed by the following experimental formulae, where H(day) is running hour of main engine. 1999：V3/G=15.2662H－0.1602 2000：V3/G=11.8225H－0.0870 2) Due to advancing of the marine fouling animals of the hull bottom and the propeller blades, the propulsive coefficient ηpc (%) have been deteriorated, since SM increases large up and the presumptive G increases up until 40～50% at the end of year. We should select the most economic operation modes corresponding to the reduction of CO2 emission which is discharged under various operating conditions of the propulsive plant of the vessel.
長崎大学の論文