著者

藤崎 廣 小野 暢三 吉識 雅夫 福田 啓二

出版者

公益社団法人日本船舶海洋工学会

雑誌

造船協會會報 (ISSN:05148499)

巻号頁・発行日

no.82, pp.87-96, 1950-07

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It is said that electrification of the auxiliaries on small cargo ship is more useful than that of steam drive. The O.S.K steamer"Ondo Maru"(680 gross tons) had installed a main diesel engine of 600 B.H.P., steam driven auxiliary engines and an oil burning boiler. The fuel consumption was too much and so the next ship of same type"Mihara Maru"had installed the electric driven auxiliaries of d.c. system, and got good result. These valuable experiences tell us that the electrification is more useful than steam drive. The electrification of the auxiliaries had almost adapted the d.c. system, by the reason that the characteristics for winch and windlass are more suitable than a.c. system. Therefore, the a.c. system for auxiliaries of cargo ship has been disregarded. However, it is considered that the a.c. system for the auxiliaries of small cargo ship is worth studing. Now, our company decided to build two small cargo ships of"F"type (about 510 gross tons) and I am planning the electrification of the a.c. 230 volts, 60 cycles, 3 phase, for the auxiliaries. Here we call, temporarily, the ship less than 500 gross tons, as the"small cargo ship". The ship of"F"type is installed a main Diesel engine of 550 B.H.P. and following auxiliares, The generater for the source of these auxiliaries are two sets of 55 k.v.a. which are drived by a Diesel engine respectively. (a) Winches 4 sets of 15 k.w. (b) Windlass 1 sets of 15 k.w. (c) Capstan 1 sets of 2 k.w. (d) Pumps 6 sets of 0.75 to 5 k.w. There are other electric installations as follows : (a) Room heaters. (b) Ordinary illuminating lamps and navigating lamps etc. (c) Wireless telegraphy. (d) Radio direction finder. (e) Echo sounding equipment. The electrification of winch, windlass and capstan by the induction motors of pole change wound rotor type, shall have many points of consideration. In this paper, it is concluded that the electrification of the auxiliaries on small cargo ship by a.c. system is rather suitable for quick building of ship, and cheapness of equipments and easy maintenance of auxiliaries.