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114年 - 114-1 交通部航港局_船員岸上晉升訓練及適任性評估_一等輪機長:輪機英文實作評估#128242
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2. 請將以下(a)到(e)有關“Dry Docking Repair Specification”的中文敘述翻譯成英文。
(c) 使用高壓水和合適的清潔劑來清洗風扇葉輪。
相關申論題
(d) 停靠乾塢期間,應將冷卻水連接至船舶的冷凍設備。
#546672
(e) 當船舶抵達乾船塢時,應將1000安培、440伏特的電力連接至岸上電源。
#546673
(a) The efficiency of diesel engines, especially of two-stroke low speed diesels, is almost independent of load over a wide load range. Furthermore, low load running without any limitation is possible down to approximately 20% of maximum continuous rating (MCR), while still ensuring high efficiency and reliability, irrespective of the plant running program. (8%)
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(b) Essentially, diesel engine combustion comprises a series of batch processes, whereas the gas turbine uses continuous combustion. In the batch process, higher initial temperatures and pressures can be used than in the gas turbine, since the exposed components are cooled at the end of each process and between processes. The thermal efficiency can therefore be higher in the diesel than in the gas turbine.
#546675
(c) Each piston stroke constitutes a batch process, and the slower it can be while still maintaining its adiabatic thermodynamic condition, the more efficient it can be. An added advantage of the slow process that takes place in a low speed engine is that the ignition delay which may occur, depending on fuel quality and engine geometry, has less impact on a low speed engine.
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(d) While a low speed engine often gives a longer ignition delay than its medium speed counterpart with the same fuel, the ignition delay is still proportionally shorter in a low speed engine, in terms of degrees of crankshaft angle. This is one of the reasons why a low speed engine is considered more forgiving than other types of machinery when low-quality, low-cost fuels are used.
#546677
1. 火災探測
#546678
2. 轉向選擇裝置
#546679
3. 空氣抽射器
#546680
4. 三相交流馬達
#546681
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