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《上海造船》2017,(1)
根据36000dwt多用途船主推进系统任务书和船级社要求,基于船型参数,分别运用HydroC omp软件和Ship Power软件进行船舶阻力计算及对比分析,以获取船舶阻力;基于船舶阻力,运用HydroC omp软件进行船机桨匹配初始设计,以获取主机功率及螺旋桨最佳转速;综合考虑主机功率、螺旋桨最佳转速、初始投资、油耗、质量及功率储备等因素进行主机选型分析,以确定主机型号;基于主机型号及船舶阻力,运用HydroC omp软件进行船机桨匹配终结设计,以获取螺旋桨桨径、螺旋桨平均螺距、螺旋桨盘面比及螺旋桨效率等主要参数;基于船级社规范进行轴系初步设计,以确定轴系轴径并最终完成该船方案设计研究。研究结果表明,该方案设计不仅满足设计任务书要求,还可据此确定主机型号、轴系和螺旋桨的基本参数,完成动力系统的报价,进行主机、轴系毛坯及螺旋桨等长周期零部件的订货。 相似文献
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根据船、机、桨关系,以船舶动力装置的能量传递为基础,基于Matlab/Simulink仿真平台建立主机能效模型。以某内河旅游船舶为研究对象,根据船体与主机参数,利用回归多项式法得到螺旋桨敞水特性曲线。在船舶上安装油耗仪等传感器,采集了主机瞬时油耗、船舶对地航速、对水航速等数据,并计算了主机的实际能效。针对实船采集的数据,分析了航道水流速度的分布特征。基于仿真模型,计算了船舶在不同航道水流速度与对水航速下的主机能效,比较分析了实测数据与仿真结果,并对模型进行了验证。本文研究对于提升船舶的营运能效指数具有实际指导意义。 相似文献
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从节能和减排的角度重点研究主机的选型.通过优化选型,将具有最低燃油消耗量,最低温室气体排放以及最高纯现值的主机选为绿色35000吨散货船的主机.为进一步降低燃油消耗量,通过主机与螺旋桨优化匹配以完成主机的优化选择.优化选择体现在以下四方面:(1)在相同服务航速条件下,采用低转速大直径螺旋桨进一步降低对主机功率的需求; (2)采用低燃油消耗率的主机;(3)采用低的减功率输出方法选择主机,使燃油消耗进一步降低; (4)备选主机的排放要满足IMO及MARPOL 73/78的有关要求.对六种机型进行了对比选择,6S46ME-BSTⅡ型主机因具有最低燃油耗量,最低温室气体排放以及最高纯现值,可作为绿色35000吨散货船的首选主机.该型主机与原来安装的6S42MC7主机相比燃油消耗量的节省可达19.5%. 相似文献
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ABSTRACTAccurately estimating fuel consumption of ships is crucial for shipping companies, port authorities, and environmental protection agencies. The bottom-up approach is becoming increasingly popular because it can estimate ship fuel consumption by accounting for ship activity conditions, such as changes in voyage speed, time, and distance; however, its use is still limited when estimating ship fuel consumption. Ship-specific information, such as the daily fuel consumption rate for main and auxiliary engines for every vessel, is expensive to gather, and generally not collected from private shipping companies. To address this research gap, we develop simplified and composite ship fuel consumption models for ocean-going container ships by size using a regression model. To estimate the fuel consumption models for container ships, we rely on ship activity data, including average speed and sailing time, distance, and actual fuel consumption for main and auxiliary engines. This information is obtained from a major container shipping company in Korea. We estimate and validate the parameters associated with fuel consumption for five different container ship sizes, all of which are smaller than the Post-Panamax container ship (15,000 TEU and above). 相似文献
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[目的]为提升船舶的能源利用率,对多因素影响下的燃料电池/锂电池混合动力船舶能效优化方法进行分析。[方法]基于Matlab/Simulink仿真建模软件,建立对象船舶的能效仿真模型,研究通航环境要素对船舶能效的影响。考虑动力源特性和船舶功率需求,提出基于模糊逻辑的功率分配策略,以优化系统能量流动。然后在此基础上,以系统总能耗最低为优化目标,建立考虑多因素的船舶航速非线性优化模型,采用鲸鱼优化算法开展优化模型动态寻优,并进行不同航行方法和航行时间约束下的能效优化分析。[结果]结果显示,在总航行时间不变的情况下,采用所提的考虑多因素的船舶能效优化方法可以降低船舶5.04%的总能耗和13.16%的燃料电池氢气总消耗。[结论]所述方法对船舶节能减排具有积极的作用,同时对提高船舶续航力和经济性具有重要意义。 相似文献
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《船舶与海洋工程学报》2016,(3)
In recent years, China's increased interest in environmental protection has led to a promotion of energy-efficient dual fuel(diesel/natural gas) ships in Chinese inland rivers. A natural gas as ship fuel may pose dangers of fire and explosion if a gas leak occurs. If explosions or fires occur in the engine rooms of a ship, heavy damage and losses will be incurred. In this paper, a fault tree model is presented that considers both fires and explosions in a dual fuel ship; in this model, dual fuel engine rooms are the top events. All the basic events along with the minimum cut sets are obtained through the analysis.The primary factors that affect accidents involving fires and explosions are determined by calculating the degree of structure importance of the basic events.According to these results, corresponding measures are proposed to ensure and improve the safety and reliability of Chinese inland dual fuel ships. 相似文献
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In recent years, China’s increased interest in environmental protection has led to a promotion of energy-efficient dual fuel (diesel/natural gas) ships in Chinese inland rivers. A natural gas as ship fuel may pose dangers of fire and explosion if a gas leak occurs. If explosions or fires occur in the engine rooms of a ship, heavy damage and losses will be incurred. In this paper, a fault tree model is presented that considers both fires and explosions in a dual fuel ship; in this model, dual fuel engine rooms are the top events. All the basic events along with the minimum cut sets are obtained through the analysis. The primary factors that affect accidents involving fires and explosions are determined by calculating the degree of structure importance of the basic events. According to these results, corresponding measures are proposed to ensure and improve the safety and reliability of Chinese inland dual fuel ships. 相似文献
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准确评估船舶的能效表现是研究船舶性能、优化船舶能效的基础。为准确评估船舶航行状态对船舶航行油耗的影响和船舶的能效表现,以某超大型散货船为研究对象,基于船舶智能能效综合管理系统获取大量船舶航行数据,通过数据处理和特征工程找出影响船舶航行油耗的因素,采用人工神经网络建立船舶航行油耗模型。采用该模型预估船舶在一段航程中的总油耗量,验证该模型在评估船舶航行状态对船舶航行油耗的影响方面的有效性。此外,采用该模型对航程和转速进行优化,验证该模型对能效优化的可行性。 相似文献
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为了探究排气阀晚关对低速船机的详细影响机制,针对一大型二冲程低速船机建立了三维仿真模型并进行了实验验证,在此基础上仿真研究了排气阀晚关对缸内气流、燃烧过程及低速机性能的影响规律和机制。结果表明:随排气阀晚关角度的增加,燃油喷射后的缸内涡流比缓慢增加,着火滞燃期逐渐延长,最高燃烧压力先大幅降低后小幅上升,指示比油耗先大幅增加后小幅减小,NOx比排放先大幅下降后急剧上升。存在一排气阀晚关角度的临界值,当超出该临界值后,排气阀晚关能够明显增强燃料与空气的混合强度,促进缸内燃烧过程,但NOx比排放会急剧增加。 相似文献