Polish Maritime Research最新文献_第3页

Retrofitting the Bow of a General Cargo Vessel Andevaluating Energy Efficiency Operational Index 改造普通货船船首并评估能效运行指数

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-12-01 DOI: 10.2478/pomr-2023-0054

Yordan Denev

引用次数: 0

Use of the AHP Method for Preference Determination in Yacht Design 在游艇设计中使用 AHP 方法确定偏好

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-12-01 DOI: 10.2478/pomr-2023-0055

Jan Sierzputowski, A. Karczewski, Przemysław Krata

引用次数: 0

Exploration of a Model Thermoacoustic Turbogenerator with a Bidirectional Turbine 探索带双向涡轮的热声涡轮发电机模型

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-12-01 DOI: 10.2478/pomr-2023-0063

V. Korobko, S. Serbin, Huu Cuong Le

{"title":"Exploration of a Model Thermoacoustic Turbogenerator with a Bidirectional Turbine","authors":"V. Korobko, S. Serbin, Huu Cuong Le","doi":"10.2478/pomr-2023-0063","DOIUrl":"https://doi.org/10.2478/pomr-2023-0063","url":null,"abstract":"Abstract The utilisation of the thermal emissions of modern ship power plants requires the development and implementation of essentially new methods of using low-temperature waste heat. Thermoacoustic technologies are able to effectively use low-temperature and cryogenic heat resources with a potential difference of 500–111 K. Thermoacoustic heat machines (TAHMs) are characterised by high reliability, simplicity and environmental safety. The wide implementation of thermoacoustic energy-saving systems is hampered by the low specific power and the difficulties of directly producing mechanical work. An efficient approach to converting acoustic energy into mechanical work entails the utilisation of axial pulse bidirectional turbines within thermoacoustic heat engines. These thermoacoustic turbogenerators represent comprehensive systems that consist of thermoacoustic primary movers with an electric generator actuated by an axial-pulse bidirectional turbine. The development of such a thermoacoustic turbogenerator requires several fundamental issues to be solved. For this purpose, a suitable experimental setup and a 3D computational fluid dynamics (CFD) model of a thermoacoustic engine (TAE) with bidirectional turbines were created. The research program involved conducting physical experiments and the CFD modelling of processes in a TAE resonator with an installed bidirectional turbine. The boundary and initial conditions for CFD calculations were based on empirical data. The adequacy of the developed numerical model was substantiated by the results of physical experiments. The CFD results showed that the most significant energy losses in bidirectional turbines are manifested in the output grid of the turbine.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138989063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Computer-Aided System for Layout of Fire Hydrants on Boards Designed Vessel Using the Particle Swarm Optimization Algorithm 利用粒子群优化算法设计船板上消防栓布局的计算机辅助系统

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-12-01 DOI: 10.2478/pomr-2023-0053

Piotr Gomułka

{"title":"Computer-Aided System for Layout of Fire Hydrants on Boards Designed Vessel Using the Particle Swarm Optimization Algorithm","authors":"Piotr Gomułka","doi":"10.2478/pomr-2023-0053","DOIUrl":"https://doi.org/10.2478/pomr-2023-0053","url":null,"abstract":"Abstract The functional layout of fire safety equipment in technical spaces of ships is a time-consuming process. When designing a ship fire protection system, the designer must manually position each system component in such a way as to meet the requirements of regulations arising from the technical specification, various legal regulations of maritime conventions and classification societies of the vessel to be designed. Layout of fire hydrants assisted by a computer that is based on pre-defined criteria and various constraints could significantly support the designer in working easier and faster. This paper presents a prototype computer-aided design system that enables optimal placement of fire hydrants using the metaheuristic Particle Swarm Optimization (PSO) algorithm. This algorithm was used in Rhinoceros 3D software with its Grasshopper plugin for visualizing the arrangement of fire safety equipment. Various solution arrangements compared with the fire hydrant placement in real ships are illustrated by a case study. Demonstrating how design work can be facilitated and what potential benefits can be achieved are presented as well.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138992686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of the Environmental Impact of the Hull Construction of a Small Vessel Based on LCA 基于生命周期评估的小型船舶船体建造环境影响分析

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-12-01 DOI: 10.2478/pomr-2023-0058

Jacek Nakielski

引用次数: 0

Transfer Function for a Controllable Pitch Propeller with Added Water Mass 添加水质量的可控螺距螺旋桨的传递函数

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-12-01 DOI: 10.2478/pomr-2023-0060

Volodimir Leshchev, Igor Maslov, Oleksandr Palagin, Andrii Naydyonov

{"title":"Transfer Function for a Controllable Pitch Propeller with Added Water Mass","authors":"Volodimir Leshchev, Igor Maslov, Oleksandr Palagin, Andrii Naydyonov","doi":"10.2478/pomr-2023-0060","DOIUrl":"https://doi.org/10.2478/pomr-2023-0060","url":null,"abstract":"Abstract The relevance of this study lies in the fact that it presents a mathematical model of the dynamics of the propulsion system of a ship that takes into consideration the mass of water added to it. The influence of this phenomenon on the resonant frequencies of the propeller shaft is examined, and a transfer function for a controllable-pitch propeller is obtained for various operating modes. The purpose of the study is to improve the calculation of the dynamic operating modes of a controllable-pitch propeller by examining the features of a visual models. The VisSim software package is used in the study. A visual model is developed that considers the influence of the rotational speed on the value of the rotational inertia attached to the variable-pitch screw of the mass of water, and a special transfer function is proposed. The study shows that a transfer function of this type has a loop enabling negative feedback. An analysis of the operation of the propeller shaft at its resonant frequency is conducted based on the application of frequency characteristics using the transfer functions obtained. We show that in the low-frequency region, a consideration of the added rotational inertia using the proposed transfer function leads to a significant difference compared to the result obtained with the existing calculation method.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139017480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Digital Twin Test-Bench Performance for Marine Diesel Engine Applications 船用柴油机应用中的数字孪管试验台性能

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-12-01 DOI: 10.2478/pomr-2023-0061

D. Minchev, R.A. Varbanets, Oleksandr Shumylo, V.I. Zalozh, N. Aleksandrovska, Pavlo Bratchenko, Thanh Hai Truong

{"title":"Digital Twin Test-Bench Performance for Marine Diesel Engine Applications","authors":"D. Minchev, R.A. Varbanets, Oleksandr Shumylo, V.I. Zalozh, N. Aleksandrovska, Pavlo Bratchenko, Thanh Hai Truong","doi":"10.2478/pomr-2023-0061","DOIUrl":"https://doi.org/10.2478/pomr-2023-0061","url":null,"abstract":"Abstract The application of Digital Twins is a promising solution for enhancing the efficiency of marine power plant operation, particularly their important components – marine internal combustion engines (ICE). This work presents the concept of applying a Performance Digital Twin for monitoring the technical condition and diagnosing malfunctions of marine ICE, along with its implementation on an experimental test-bench, based on a marine diesel-generator. The main principles of implementing this concept involve data transmission technologies, from the sensors installed on the engine to a server. The Digital Twin, also operating on the server, is used to automatically process the acquired experimental data, accumulate statistics, determine the current technical state of the engine, identify possible malfunctions, and make decisions regarding changes in operating programs. The core element of the Digital Twin is a mathematical model of the marine diesel engine’s operating cycle. In its development, significant attention was devoted to refining the fuel combustion model, as the combustion processes significantly impact both the engine’s fuel efficiency and the level of toxic emissions of exhaust gases. The enhanced model differs from the base model, by considering the variable value of the average droplets’ diameter during fuel injection. This influence on fuel vapourisation, combustion, and the formation of toxic components is substantial, as shown. Using the example of calibrating the model to the test results of a diesel engine under 27 operating modes, it is demonstrated that the application of the improved combustion model allows better adjustment of the Digital Twin to experimental data, thus achieving a more accurate correspondence to a real engine.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139019070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strategies for Developing Logistics Centres: Technological Trends and Policy Implications 发展物流中心的战略：技术趋势和政策影响

IF 2 3区工程技术

Polish Maritime Research Pub Date : 2023-12-01 DOI: 10.2478/pomr-2023-0066

Minh Duc Nguyen, Kong Tae Yeon, K. Rudzki, Hoang Phuong Nguyen, Nguyen Dang Khoa Pham

{"title":"Strategies for Developing Logistics Centres: Technological Trends and Policy Implications","authors":"Minh Duc Nguyen, Kong Tae Yeon, K. Rudzki, Hoang Phuong Nguyen, Nguyen Dang Khoa Pham","doi":"10.2478/pomr-2023-0066","DOIUrl":"https://doi.org/10.2478/pomr-2023-0066","url":null,"abstract":"Abstract Logistics centres are currently performing a key function in the development of countries through their ability to regulate goods, markets, and transport. This is shown by the infrastructure, cost, goods flow, and quality of logistical services provided by these centres. Nevertheless, in developing nations or regions with antiquated logistics infrastructure, conventional logistics centres seem to struggle to manage the volume of commodities passing through them, resulting in persistent congestion and an unsteady flow of goods inside these facilities. This issue poses a challenge to the progress of any nation. The emergence of new technology offers a potential avenue to solve the problems inherent in traditional logistics centres. Most prominently, four technologies (the Internet of Things (IoT), Blockchain, Big Data and Cloud computing) are widely applied in traditional logistics centres. This work has conducted a thorough analysis and evaluation of these new technologies in relation to their respective functions and roles inside a logistics centre. Furthermore, this work proposes difficulties in applying new technologies to logistics centres related to issues such as science, energy, cost, or staff qualifications. Finally, future development directions, related to expanding policies in technological applications, or combining each country’s policies for the logistics industry, are carefully discussed.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139023466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Study of Fuel Combustion and Emission Characteristics of Marine Diesel Engines Using Advanced Fuels 采用先进燃料的船用柴油机燃料燃烧与排放特性试验研究

3区工程技术

Polish Maritime Research Pub Date : 2023-09-01 DOI: 10.2478/pomr-2023-0038

Li Changxiong, Yihuai Hu, Zy Yang, Hao Guo

{"title":"Experimental Study of Fuel Combustion and Emission Characteristics of Marine Diesel Engines Using Advanced Fuels","authors":"Li Changxiong, Yihuai Hu, Zy Yang, Hao Guo","doi":"10.2478/pomr-2023-0038","DOIUrl":"https://doi.org/10.2478/pomr-2023-0038","url":null,"abstract":"Abstract In order to explore the potential application of oxygenated fuels, polyoxymethylene dimethyl ethers (PODE), as an alternative fuel for marine diesel engines, the fuel combustion performance and gas emission characteristics of pure diesel oil, diesel-blended PODE, and pure PODE were tested on a marine diesel engine under different running conditions. The experimental results indicate that oxygen consumption can be reduced by diesel-blended PODE and pure PODE. The in-cylinder pressure and exothermic curve were consistent with the trend of diesel oil. Also, the ignition delay of diesel-blended PODE and pure PODE decreased, and the diffusion rate was accelerated, which helped to improve the combustion performance of diesel engines. Diesel blended PODE and pure PODE reduced the particulate matter (PM) emissions by up to 56.9% and 86.8%, respectively, and CO emissions by up to 51.1% and 56.3%, respectively. NOx emissions were gradually decreased with engine load. CO2 emissions were slightly increased, and the effective fuel consumption was increased up to 48% and 132%, respectively. It was shown that PODE could provide comparable power in a marine diesel engine and improve the fuel combustion and gas emission of the engine as a clean alternative fuel for marine diesel engines.","PeriodicalId":49681,"journal":{"name":"Polish Maritime Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135687995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Event-Triggered Adaptive Neural Network Trajectory Tracking Control For Underactuated Ships Under Uncertain Disturbance 不确定扰动下欠驱动船舶事件触发自适应神经网络轨迹跟踪控制

3区工程技术

Polish Maritime Research Pub Date : 2023-09-01 DOI: 10.2478/pomr-2023-0045

Wenxue Su, Qiang Zhang, Yufeng Liu

引用次数: 0