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首页> 外文期刊>International Journal of Marine Engineering Innovation and Research >Modelling the Turbocharger Cut Off Application Due to Slow Steaming Operation 12RTA96C-B Engine
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Modelling the Turbocharger Cut Off Application Due to Slow Steaming Operation 12RTA96C-B Engine

机译：由于慢速蒸发操作12RTA96C-B发动机，涡轮增压器造型造型涡轮增压器

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摘要

Out of the total operational costs of a ship, fuel costs account for by far the highest proportion. In view of the global economic situation and the rising oil prices, shipowners and charterers are looking for solutions to cut costs by reducing fuel consumption. Low load operation, also well-known as “slow steaming”, represents the currently most effective and popular measure to cut fuel costs and, in consequence, the total operational costs for increased competitiveness in the market. Low load operation is possible and there is an increasing trend to operate in these very low engine load ranges. As the engines were not designed for this operational condition, various retrofit modifications to the engine can compensate for this. By using low load operation, the reduction of the RPM gives problems when sailing at low speed.? A turbocharger (TC) compresses inlet air to a high pressure and after cooling this compressed air it results in higher mass of air in the cylinder. But when running at a low power load this air reaches temperatures that are too low for an optimal combustion process. One of the solution comes from the company W?rtsil?. They install so called “low steam engine kits”. When this kit is installed it allows the engine operators to cut off one turbocharger of the engine, this result’s in a higher RPM for the operating turbochargers. When the remaining TC’s have a higher RPM their efficiency improves and gives the engine more air for combustion.The goal of this Bachelor thesis is to make a calculation modelling and prove that by switching off one or more turbocharger on the system will improve the efficiency in slow steaming operation. Beside that, this thesis is aims to estimated the performance of the engine in both operation condition.
机译：出于船舶的总运营成本，燃料成本占最高比例。鉴于全球经济形势和油价上涨，船东和租船人正在寻找通过降低燃料消耗来降低成本的解决方案。低负荷运行，也是众所周知的“缓慢蒸汽”，代表目前最有效和最流行的措施，以降低燃料成本，并因此，市场上提高竞争力的总运营成本。低负载操作是可能的，并且在这些非常低发动机负载范围内运行的趋势越来越大。由于发动机没有设计用于该操作状态，因此对发动机的各种改装修改可以补偿这一点。通过使用低负载操作，在低速航行时RPM的减少会出现问题。？涡轮增压器（TC）将入口空气压缩到高压和冷却后，将该压缩空气导致圆柱体中的较高质量的空气。但是，当以低功率负载运行时，该空气达到太低的温度，对于最佳燃烧过程。其中一个解决方案来自公司W？RTSIL ?.他们安装所谓的“低蒸汽机套件”。安装此套件时，允许发动机操作员切断发动机的一个涡轮增压器，此结果在更高的RPM中为操作涡轮增压器。当剩余的TC具有更高的RPM时，它们的效率提高并使发动机更加燃烧。该学士论文的目标是通过关闭系统上的一个或多个涡轮增压器来进行计算建模并证明这将提高效率慢速蒸发操作。除此之外，本论文旨在估计发动机在操作条件下的性能。

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