Engine Room Research Articles

Appraising young adult built environment researchers training needs in a developing economy: a perspective from stakeholders

PurposeStudies have shown that research is a global innovation’s “engine room.” Therefore, young adult-built environment researchers (YABER), especially in developing countries, need research upskilling and reskilling training for better-integrated outcomes. Evidence shows that research training can improve YABER competencies and proficiencies. In Nigeria, YABER may have had some challenges in training needs. There is a lack of extant literature about the issues facing Nigeria’s YABER upskilling and reskilling training needs. Thus, this study investigated the perceived problems facing YABER and proffered measures to improve their training needs in Nigeria.Design/methodology/approachThe researchers used participants from Edo State, Abuja and Lagos State, Nigeria. This study adopted a qualitative research approach. The researchers accomplished saturation after 40 virtual interviews and adopted a thematic analysis for the primary data.FindingsThe research shows that the built environment research refines current and creates new knowledge. The built environment researchers (trainers and trainees) need training but face challenges. Findings clustered measures to improve quality research publications in the built environment through YABER training into government/regulatory agencies-related, higher education institutions-related and researcher-related measures.Originality/valueThe developed framework and thematic network analysis could be used to stimulate YABER training needs and, by extension, stir Nigeria’s higher education institutions regulatory agencies to upgrade requirements for academic staffers, especially published articles, to be compulsorily Scopus/Web of Sciences indexed for promotion exercise. This is the global best practice, and Nigerian scholars cannot be in isolation. It will form part of this study’s implication and revitalise UNSDG 4.

Experimental study of the effect of the properties of motor oils on the vibration and noise levels of internal combustion engines

The article discusses the results of an experimental study of the effect of the properties of domestic engine oils with copper-based additives produced by Kupper on the vibration and noise levels of marine propulsion systems using the example of a 3D6 diesel engine. 3D6 diesels are representatives that widely cover both the transport and marine sectors of power plants, which explains their choice as an object of research. Increased noise and vibration levels on ships negatively affect crew members and passengers and lead to fatigue and distraction of the watchmen. The engine oil used was standard MS20 oil, which is used for high-speed marine diesel engines and an innovative oil with copper-based additives. Comparative measurements of vibration and noise were carried out on a Yaroslavets-class vessel using an authorized vibration and noise meter of the first class Ecophysics110A. As a result of the study, it was found that vibrations in the most vibro-active modes of operation of the 3D6 diesel engine are reduced by 30–50 % when using oil with copper-based additives. The use of oil with copper-based additives also has an effect on reducing noise in the engine room, but in the high-frequency spectrum with a frequency of more than 1000 Hz. More effectively, engine oil with copper-based additives affects the reduction of the overall noise level in the wheelhouse of the vessel and as a result, an effect of about 3 dB was achieved, which reduces the effect of noise by 1.4 times in terms of physical perception for humans.

Algorithms of training programs for simulator training of ship's engine room personnel

The ship's engine room personnel (mechanics, electromechanics) ensure the technical operation and safe functioning of the ship's power systems. Professional training and retraining of marine specialists of ship's engine rooms is necessary due to the constant improvement of equipment and automation of electric power systems of modern ships. To ensure high-quality training of the ship's engine room team, simulator training is used with a set of modern simulators of ship power plants and electric power systems that meet the standards of the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers. In the course of the study, block diagrams of training algorithms have been developed; program features and examples of their operation have been shown. The obtained algorithms for training on simulators make it possible to implement both the initial training of cadets and the retraining of specialists when improving their qualifications. In the course of simulator practice, the opportunity to develop competencies for working with high-voltage equipment (3–10 kV) of modern ships in accordance with the requirements of the STCW Convention and the STCW Code is of particular importance. Algorithms for training in high-voltage equipment maintenance should be introduced into the educational process to improve the level of qualification of specialists.

Analysis of indicators for the development of a drawing of the general arrangement of the industrial complex

The article shows the necessity and relevance of creating new ships for cruise routes along the rivers of the Russian Federation. The names of hydrofoils built are listed. It is shown what the designers are guided by when developing a drawing of the general location of the vessel. Some changes in the requirements and recommendations of regulatory documents for the design and construction of new generation vessels compared to ships built in the 60s are given. Some characteristics of ships and the area of hydrofoil vessels, such as Comet 120M, Meteor 120R, Valdai 45R, are presented. A comparative analysis of the indicators for calculating the areas and volumes of the premises of the new generation SEC and ships built in the 60s of the last century is given. Dependency graphs are constructed to estimate the volume of the engine room, the total volume of peaks, and the area of the conning tower of marine and river hydrofoils. Formulas are given for determining the volume of the engine room and the volumes of the forepeak and afterpeak at the initial stage of ship design. Conclusions are drawn about the need for recalculation of the need for recalculation of indicators for calculating the areas and volumes of hydrofoil vessels.

Numerical Simulation Study on the Response of Ship Engine Room Structure Under Fire Based on Thermo-Mechanical Coupling Model

Ship structures may collapse or be severely deformed during a fire. To precisely assess the post-fire structural integrity of ships, in this study, a thermal–mechanical coupling data interface was created, employing a significant eddy simulation algorithm for fire dynamics and a technique to analyze the structural thermal–mechanical coupling reaction. PyroSim was utilized to build a fire scenario, exporting 3D data through the device’s own program, and then the ANSYS thermal–mechanical coupling model was employed to study the spatial temperature distribution under fire-induced conditions. Data from the three-dimensional spatial temperature field served as the boundary condition for the determination of the structural temperature burden. Building on this, an analysis was conducted on the structural response of the intricate two-story interior compartment under fire conditions. The results showed that the location of the fire source and the structural distribution of the mechanical equipment inside the cabin had a great influence on the temperature and combustion heat, followed by the ventilation conditions, while the temperature variations in the parallel dual fuel tanks were greatly influenced by the stack effect. By comparing the stress and strain of the two-layer cabin under normal and fire conditions, the damage and mechanisms associated with important positions in the cabin under fire conditions were revealed.

Optimization Model of Ship Engine Room Electrical Equipment Layout Based on Deep Learning

Optimization Model of Ship Engine Room Electrical Equipment Layout Based on Deep Learning

Simulation Approach as an Educational Tool for Comparing NOx Emission Reductions in Two-Stroke Marine Diesel Engines During Low-Load Operation: Water–Fuel Emulsion vs. Late Injection

Shipping, as the most efficient, cheapest, and most widespread mode of transporting goods, also generates significant exhaust emissions. This has led to the adoption of stringent regulatory restrictions on emissions from ship propulsion systems. Consequently, the education and training of marine engineers can significantly impact their understanding of how emissions are generated and their potential for reduction. The engine room simulator is an indispensable tool in the training of marine engineers. Since operating conditions and parameters have the greatest impact on NOx emissions, this forms the primary focus of this research. This study tests the accuracy and precision of the engine room simulator in simulating emissions and evaluating the influence of operating conditions on them. Furthermore, the implementation and testing of NOx emission reduction technologies are vital for promoting sustainable shipping, ensuring regulatory compliance, and training personnel to support environmentally conscious maritime operations. Using the example of a two-stroke marine diesel engine, the results obtained are compared with test bench data from similar engines. Special emphasis is placed on simulating the operation of a two-stroke diesel engine at low speed, or low load, where secondary NOx reduction methods cannot be used. Therefore, the simulator is tested using two available technologies: water–fuel emulsion and altering the fuel injection timing to reduce NOx emissions. The simulation results for the water–fuel emulsion show high accuracy in predicting NOx emission trends when changing the water content in the emulsion at nominal power. However, at low load, the results show significant deviations. Testing the effect of altering fuel injection timing under low load using the engine room simulator shows significant differences compared to available research. Nonetheless, research on NOx emissions in this engine mode is limited, presenting a potential area for further study. When comparing the results for nominal power operation, the simulation provides more accurate results, particularly in terms of the influence of fuel injection timing on NOx emissions. However, engine tests on the test bench still reveal more substantial changes in emissions than those obtained using the engine room simulator.

Numerical study of engine room air ventilation systems for landing ship tank class warships in supporting crew comfort and safety

Abstract The air ventilation system is one of the supporting systems in the machinery of a warship. High temperatures in the engine room can lead to an unpleasant atmosphere and, in particular, to heat stress for the operating personnel. This heat stress was caused by the design of the engine room ventilation system not meeting the requirements due to the supply and exhaust fan. Under the given conditions, the air temperature reached 50 °C, higher than the standard 45 °C. Therefore, it was necessary to conduct a thermal analysis and redesign the ventilation system using a 3D CFD (Computational Fluid Dynamic). The parameters included temperature distribution, Hlow distribution, and Hlow velocity in the engine room of the Landing Ship Tank class warship when the engine load reached 50%, 75%, and 100%. The results obtained from the simulation were in the form of quantitative data such as temperature gradients and iso contours of the air in the engine room inside the warship. The data comprised velocity contours, temperature, velocity vectors, streamlines, and particle trajectories in space. The results of the CFD approach showed that the quality of the ventilation system in the engine room inHluences extreme conditions in the engine room.

Redesign the air ventilation system in the engine room 48 meter patrol ship

Abstract The patrol boat with a Length Overall of 48 meters has the main function as a coastal patrol boat. The air ventilation system installed on patrol ships currently reaches an average temperature of 320°K ∼ 345°K with an average speed of 0 ∼ 2.5 m/s and the airflow is not distributed throughout the engine room. The temperature in the engine room is above the ISO 8861:1998 standard where the maximum temperature is 318.15 K (45°C). Based on calculations according to ISO 8861, the total air capacity requirement is 10.806 m3s−1 or 38.901 m3/hour, while the currently installed air blower capacity only has an air capacity of 3.988 m3s−1 or 14.358 m3h−1. The existing air ventilation system consists of 2 air blowers that suck in outside air. Computing Fluid Dynamics (CFD) is used to calculate the temperature distribution of the engine room between the existing ventilation system and the ventilation system based on ISO 8861 calculations. Based on the CFD simulation results, a blower modification with a capacity of more than 10.806 m3s−1 is carried out so air can be distributed throughout the room at an average speed 2.5 ms−1 ∼ 8 ms−1 with engine temperature at a height of 1-2 meters is 303°K ∼ 315°K according to ISO 8861:1998 standards.

Assessing post-fire material degradation: A ship structural analysis case study

Abstract A bulk carrier ship caught fire while loading fertilizer at the dock, originating from generator of auxiliary engine No. 2 portside. It took approximately 12 hours to successfully extinguish the fire. As the consequence of this accident, the ship suffered significant damage to its structure, machinery, and electrical systems in various areas, including the engine room, superstructure and deck house. A comprehensive assessment was conducted to evaluate the structural integrity of the ship, particularly concerning the post-fire material strength degradation, as well as the impacts of using seawater to extinguish the fire. Destructive tests were carried out on eight material samples taken from parts of the structure heavily affected by fire-induced deformation and from areas that were visually affected by the fire accident. The test results show that there is a decrease in strength of the materials, particularly in areas experiencing slow cooling due to the annealing phenomenon. Areas of the structure exposed to water spray during the firefighting process did not exhibit material embrittlement, as no martensite phase was detected in the microstructure. Additionally, the hardness value remained significantly lower than that associated with the martensite phase.

Research on hydrogen diffusion and sensor arrangement strategy in a marine engine room

This paper investigates the diffusion behavior and spatiotemporal concentration distribution of hydrogen in the marine engine room under different leakage conditions. By analyzing the response times and alarm rates of sensors, it identifies the optimal positions for sensor installation. When hydrogen leaks in the upper and lower layer sequentially, the maximum diffusion volumes within 150s are 1804.0 m3 and 2281.9 m3, while the minimum diffusion volumes are 784.7 m3 and 1377.9 m3. These findings reveal significant differences in hydrogen diffusion behavior under different leakage locations and directions. Sensor arrangement recommendations are made for specific height ratios (h/H) where alarm rates are highest and response times shortest. The recommended installation positions are S4∼S6, S11∼S12 at h/H = 0.30, and S6, S12∼S11, S16, S25 at h/H = 0.52, and S3, S19, S2, S5, S10, S14, S20∼S22 at h/H = 0.97, as well as near the interfaces of hydrogen pipelines, valves, and gas equipment interfaces with a high risk of leakage.

Features of Providing Air Temperature and Humidity Parameters in the Engine Room Working Area at Sewage Pumping Stations

Statement of the problem. There is an important task for engineers to improve the working conditions of workers in industrial facilities. The waste water system includes a large number of structures with different temperature and humidity microclimate characteristics. The possibility has been discussed to improve these characteristics by redistributing air flows in the engine room of a city sewage pumping station with PLI panel. Results. There are the results of the temperature and humidity microclimate parameters research in the working area of the engine room at a high-voltage sewage pumping station which is located in Moscow. The author has proved the possibility of use the cooled air from the machine room lower level in a high-voltage pumping station at the machine room main working area. It has been described the calculation features of the heat transfer coefficients in the proposed model for local ventilation at the main technological working area. It has been described the results of temperature and humidity parameters instrumental study in the main working area and the lower level. Conclusion. Thelocal ventilation systems could be used for the working area, where an employee performs repair work of the main technical equipment in a sewage pumping station. The balanced mathematical thermal model includes PLI panel’s potential location.

Vibration optimization methods of dredger engine room

Abstract Due to the large number and heavy weight of equipment, as well as the high center of gravity in the cabin area of dredgers, the concentrated arrangement of equipment is prone to local vibration problems in the cabin area. Additionally, there are many devices that need to be placed under the deck in the cabin area, which imposes significant constraints on the placement of supports. Using the finite element method to analyze the vibration problem of a certain dredger, we studied the influence of different equipment arrangements and structural reinforcement methods on vibration. This allowed us to summarize the characteristics of vibration under different improvement methods, providing feasible solutions for improving the vibration problem in the cabin area of dredgers. After adjusting the equipment layout and reinforcing local structures, the vibration in the dredger’s cabin area ultimately meets the design requirements satisfactorily.

Perancangan Alat Pendeteksi Gerakan Manusia Menggunakan Sensor Passive Infrared Berbasis Arduino ESP32 dengan Tampilan SMS di Ruangan Mesin Kapal

The tool that detects human movement has been designed with a passive infrared sensor based on Arduino ESP32 which can send messages via SMS to the ship's security system. This is the background to the need to improve the security system on ships. The aim of this research is to find out the movement in the ship's engine room. This system can find movements. This tool can detect a maximum distance of 6 m. This system consists of software and hardware that allows sensors to detect human actions. The software uses the C+ language program and is used on the Arduino ESP32. Press the switch to activate this device. A message will be sent to the owner's smartphone if there is movement. Methods and tool system design for applied scientific work that will be carried out using prototype research methods. Prototype research methods are used to produce certain products, and test their effectiveness. The results of the research in this applied scientific work are the level of accuracy of the PIR sensor which detects human movement at a maximum distance of 6 meters and sim800L as a message sender to Android. Beyond that the data is unreadable and invalid.

Application of Safety Procedure As Efforts To Prevent Work Accidents In MT. Serang Jaya Engine Room

Safety Procedure is a formal written safety procedure and contains procedures, identification and obligations to carry it out while working. Not optimal due to lack of understanding of Safety Procedures that pose a risk of work accidents. This study aims to determine the causes and impacts of the non-optimal implementation of Safety Procedures and efforts so that the Safety Procedure can run optimally so as to prevent work accidents in the engine room. The research method used in this study is a qualitative method with a descriptive pattern. Research data sources are obtained from primary and secondary data. Data collection techniques through observation, literature study, interviews and documentation during the time researchers carried out marine practices on the MT ship. Serang Jaya. The data analysis techniques used are by collecting data, reducing data, presenting data and drawing conclusions or verifying data which is also supported by fishbone analysis. Testing the validity of data using the tringulation method. The results stated that the factors of not optimal Safety Procedure due to lack of crew understanding of Safety Procedure, and crew concern for safety as well as lack of supervision and coordination between crew and management are the reasons why Safety Procedure cannot run optimally. The impact of not optimal Safety Procedure is the high risk of work accidents, hampering ship operations, harming the ship or the parties concerned. Efforts that can be made to optimize this are by carrying out Safety meeting activities, Toolbox Meeting, Drill, installing Safety Signs. And always provide counseling related to Safety Procedure in the engine room.

Comparative Analysis of Piezoelectric Transducers for Low-Power Systems: A Focus on Vibration Energy Harvesting

With advances in technology, the generation of electrical energy through the harvesting of energies dissipated in the form of mechanical vibration, known as power harvesting, has received increasing attention in recent decades. It is undoubtedly an interesting means to power systems with low energy consumption. This research aims to evaluate an energy generation system based on the piezoelectric effect activated by mechanical excitation and develop a system capable of powering devices and sensors for temperature monitoring in a practical situation, such as in an engine room, aiming to ensure its safe operation. Two transducers subjected to vibrational excitation were evaluated, and then an energy generation system using a buck DC-DC converter circuit was assessed. The transducer was connected to the input of the board, the microcontroller to the output, and the LM35 temperature sensor along with the battery was used to ensure the circuit’s autonomy. Additionally, the Attiny85 microcontroller was programmed to perform temperature monitoring tasks in a continuous low-energy-consumption mode. The obtained spectral analysis results showed a maximum generation power of 8.88 mW for the PZT-5H transducer and 3.3 mW for the P5-13B transducer. The use of LTC3588-1 increased the autonomy of the monitoring system by 64.3% and reduced the system’s usage time in cases of temperature anomalies by 50%.

Global Pipe Optimization for Ship Engine Room

Global Pipe Optimization for Ship Engine Room

Coupling CFD and VR for advanced firefighting training in a virtual ship engine room

Firefighting training using virtual reality (VR) technology has still not been used extensively in the maritime industry. One of the reasons lies in the inability of VR to accurately replicate the true dynamics of a fire. However, this shortfall can be effectively addressed by integrating computational fluid dynamics-based (CFD) models of fire spread into VR training simulations, thereby significantly enhancing the realism and educational value of these scenarios. In this study, a scenario of a fire spread inside the ship engine room has been developed. First, as a CFD analysis, whose results were then transferred to the VR environment. That approach has been tested with users who have noted that CFD-based fire gives a more realistic appearance than the generic modelled solely using the game engine.

Exploring the Perceived Ease of Use of an Immersive VR Engine Room Simulator among Maritime Students: A Segmentation Approach

The integration of innovative technologies, such as Virtual Reality (VR), into maritime education presents a substantial challenge but also offers significant potential for enhancing training and knowledge transmission. This study aims to contribute to the existing body of knowledge by providing segmented insights into maritime students’ Perceived Ease of Use (PEU) of an immersive engine room VR simulator. The study analysed a sample of 58 students from the Faculty of Maritime Studies at the University of Rijeka, covering undergraduate, graduate, and specialized maritime education programs. Through hierarchical and non-hierarchical cluster analyses, two distinct segments were identified and named Proactivists and Moderates. The findings reveal significant differences between extracted sub-groups regarding (i) perceived benefits of using the VR engine room simulator in learning and education, (ii) future intention to use the technology, and (iii) overall experience. Study insights can directly aid educators and software developers in enhancing the further implementation of VR technology in maritime education.

Creep assessment of thermoplastic materials for non-structural components in marine engines

The substitution of metals with fiber-reinforced polymers represents a well-established practice in the automotive and aerospace industries, driven by advantages such as cost reduction, weight savings, and environmental benefits. In the marine engineering sector, there is a growing interest in this metal replacement trend, particularly for non-structural components of marine engines that can be produced by adopting proper fiber-reinforced thermoplastic polymers. However, evaluating the suitability of such materials for marine applications necessitates a thorough understanding of their creep behavior, given the demanding operational environments and strict safety standards. The material selection process must intricately consider the material's susceptibility to creep through tailored material design methodologies. Moreover, redesign activities should aim to leverage the material's creep-resistant properties while ensuring adequate strength and simplifying installation procedures. Unfortunately, unlike the automotive industry, testing innovative plastic components in real environments on working engines is quite impossible. Neither engine manufacturers nor owners would allow jeopardizing their machinery by installing technologies not yet certified in a delicate environment such as a ship's engine room. In this context, finite element simulations offer a valuable tool to assess the material's creep performance and validate the proposed design when experimental measurements cannot be performed, hence predicting the component behavior over its intended lifetime. This study aims to exploit finite element analysis to evaluate the creep behavior and suitability for marine engine applications of a fiber-reinforced thermoplastic material, focusing on a camshaft cover of a four-stroke marine engine currently manufactured from aluminum alloy. Through numerical simulations, a commercial 30 % wt GFs/PA6,6 thermoplastic composite emerges as a promising candidate, demonstrating adequate creep resistance while significantly reducing weight, processing costs, and energy consumption. The results obtained from the present study lay the foundations for the adoption of such material-based technology also in the marine engine sector despite the difficulties coming from the peculiarities of this industry.