Journal of Marine Technology and Environment 2012 Vol. 1

An investigation on the corrosion behavior of aluminum at different sites of sea water in Kuala Terengganu was investigated. The method of corrosion assessment was by the use of potentiodynamic polarization scan (PP) and weight loss test. Aluminum alloy 1508 was employed in this study. This metal was immersed in seawater at different sites of Kuala Terengganu coastal area with different distance from the shore. Results obtained from electrochemical test techniques shown that lower corrosion effect of the metal significantly reduced the corrosion densities (icorr) and corrosion rate. The solution of seawater affects the corrosion rate according to their chemical and physical behavior of the sea water parameter

Many European countries require the skipper of a pleasure craft to be able to provide evidence of his competence. The pleasure craft operator card or boating license permits people operate a pleasure craft. One of the requirements of this license is intended to decrease the number of boat accidents. This paper analysis the regulation of different European Union countries related on recreational boat licensing and states that there is no uniformity at European level in terms of the requirements for sailing in pleasure boats. Thus, licenses that allow navigation in pleasure boats, the theoretical and practical as well as the requirements for obtaining the qualification and training of future skipper, essential for ensuring the safety of these boats are different depending on the member state of the European Union that we are talking about. The paper is divided into following sections: Section 1 describes a brief introduction; Section 2 provides the state of art and current Spanish regulation; Section 3 analysis different European countries regulation; Section 4 proposes the need of an European certificate and finally, Section 5 remarks some conclusions and further research.

The article presents and discusses results obtained from an experimental examination of the general and linear resistances of a pipeline. The impact of the fluid temperature over the friction losses is examined. Satisfactory similarity is encountered by comparing numerical and experimental results. The possibility of head losses optimization by means of temperature change is confirmed.

The article presents and discusses results obtained from a non-isothermal research and modeling of hydraulic linear pipeline resistance. Main objective of the work is to determine the linear resistance coefficients for pipelines of circular cross-section. The effect of the temperature variation is taken into account by the change in the viscosity value of the working fluid (hydraulic oil). The issue of thermal optimization of the flow regime is discussed as a way to reduce the head losses in the pipeline.

The concept of quality and satisfaction related to education services have been discussed enthusiastically in last 30 years. Nowadays, almost all societies and organizations have established their own ISO 9001 – 2000 quality system with a certain accreditation association. Quality standards in maritime education have been exposed with International Convention of STCW 78/95. In quality systems to improve services and expand activities feedbacks and user’s satisfaction should be taken from users of these services. Dokuz Eylul University Maritime Faculty is taking many feedbacks from graduated students. The first version of the instrument used in this paper was developed and adopted from education service quality instrument by NAS (2000). The last version of the instrument, called as “METQUAL”, was developed considering MET needs and “Accreditation Board for Engineering and Technology”. The validity and reliability of “METQUAL” was found satisfying in the pilot studies. In this study, the quality of the education and training service in Maritime Faculty (MF) of Dokuz Eylul University (DEU), Marine Transportation Engineering Department (MTED) is evaluated with the instrument of “Maritime Education and Training Quality” by the graduates from between 1999-2008. At the end of research, the results of faculty’s service quality are presented according to graduates perception of service quality and the activities are explained, which should be done to develop and improve service quality of the faculty.

A thermodinamic model has been used to investigate the combustion performance of a four cylinder direct injection diesel engine fueled by biofuels The numerical simulation was performed at constant speed. The indicated pressure, temperature diagrams are plotted and compared for different fuels. The emissions of soot and nitrous oxide are computed with phenomenological models. The experimental work was also carried out with biodiesel diesel blends, to validate simulation results with experimental results, and observed that the present model is successful in predicting the engine performance with biofuels.

The goal of this paper is to present the results in the development of a methodology to integrate simulation, forecasting and planning to support day by day and long term decisions for operators working in intermodal container terminals. Congestion and increasing cargo dwell times is a common scene in many of the world’s ports. Government authorities such as customs and health may delay containers from reaching their destinations due to inspections. Shipping lines are unconcerned if there is a poor terminal productivity, as long as their vessel sails on time.

This paper presents the advantages of using the composite materials in shipbuilding and marine structure. The volume and number of applications of composite materials have grown steadily, penetrating and conquering also the marine industry. Modern composite materials constitute a significant proportion of the engineered materials market ranging from everyday products to sophisticated applications.

The aluminium and its alloys are widely used in marine applications such as ship hull and its components due to its lightweight and corrosion resistance. The aluminium alloys require special tool and skill to weld due to high thermal conductivity. A research vessel “RV Discovery” is currently being constructed exclusively using 5083-aluminium alloy for University Malaysia Terengganu and the welding properties were investigated. The aluminium welded joint specimens were prepared using the Tungsten Inert Gas (TIG) welding process by certified welders at different current settings. The mechanical characteristics of the welded alloys were carried out for tensile, impact and hardness tests. Further, metallographic examination was conducted to identify and observe the various fusion zones. The results of these tests are presented in this paper. This study revealed that, the different welding current settings in which specimens were prepared remarkably affect the mechanical properties of 5083-aluminium alloy joints.

That through a period of global economic crisis is a topic on the agenda, but we have to analyze what impact it has on shipping and what measures we take to maintain or why not develop maritime activity in this period. The structural changes that occur in international trade and maritime development have a direct impact on growth and expansion port.

The Coefficient of Performance is a standard criteria for performance analysis of refrigeration cycle. Even if the first law analysis method is widely used to evaluate thermodynamic systems, it deals only with energy conservation. Instead, exergy analysis offers useful indications when the performance improvement is aimed. In this paper it is developed a first and second law analysis. It is studied the influence of different parameters on the Coeficient of Performance and on the exergy efficiency of a two stage vapor compression refrigeration cycle working with ammonia frequently used in fishing industry.

In order to determine the ship’s vulnerability to magnetic detection all sources generating static and alternative magnetic fields must be considered. Besides ship ferromagnetism and induced eddy currents, major sources of magnetic signatures are corrosion related magnetism - giving both static and variable magnetic fields through various mechanisms, and the stray fiels generated by electric circuits onboard. This paper discusses the last two sources, their characteristics, the various processes of generating magnetic fields and the particular methods of reducing the resulting signatures.

In this work the double choice for the dead state in exergy calculations is considered. Energy systems for marine and naval applications cover a wide range of possibilities and the exergetic analysis have proven to be a very useful tool at the previous design stages. Exergetic efficiency calculations of power generating systems allocated on board require a dead state definition as well as the knowledge of ambient conditions at any location defined by latitude and longitude. Temperature, pressure and relative humidity values at sea level all over the world have been estimated by using EdGMC software. Total exergy of ambient air and a methanol/water liquid mixture has been calculated at every latitude and longitude by using a unique dead state and a local dead state. The results obtained with both dead states are compared.

The purpose of this paper is to show a vast range of potential areas for energy efficiency improvement and examine different technologies and possibilities for reduction of energy consumption in ships. A combination of energy efficiency measures is considered as an integrated solution for achieving effective ship operation.

At the beginning of the 20th Century, as humanity entered the age of industrialism there was not a soul asking the question what the effects on the environment would be. However, the negative impacts that have gripped the entire planet are now undisputable, although at that time, because the human activity was negligible so was its impact. This paper focuses on how maritime transport acts as a pollution source, and what can be done to reduce the quantities of pollutants, looking both at the existing technologies and at latest research programs. The Green Ship idea refers to ideal ships that are environment friendly. We will detail this looking from two points of view: The first one is the Green Ship being a vessel that uses alternative means of propulsion, where the internal combustion engine is replaced with electrical engines that use sun charged voltaic batteries, or rotary sails, or sails that are raised to high altitudes. The second idea refers to what can be practically done on board ships to reduce pollution. This includes, improving the quality of fuel or lowering its sulphur content, improving the construction process or methods for ship hulls or engines.

The purpose of this paper is to make investigations at aluminum alloy welded structures in condition of normal welding (TIG-tungsten inert gas welding), and the same procedure but arc-weld is disrupting and makes void spaces into the weld bead. It is very known that aluminum reacts with oxygen despite of using protective argon atmosphere and will cause porosity which decrease strength and ductility.

The paper focuses on the methods and techniques of composing teaching/learning materials for marine engineers who are trained to receive Bachelor Degree. Maritime English language materials meant for communicative activities are linguistically oriented, authentic and highly motivating from the professional point of view. These materials are based on the arrangement principles of English-Russian Dictionary of Maritime Terms developed at ESP department of the Academy. The paper suggests terminographic essays for the language classroom activities as a means of practical work with engineering terms.

The present paperwork is meant to present a new innovative and highly efficient solution for a two compression stages which is the object of a brand new invention Patent. This paperwork is proving that the proposed high efficiency turbocharger is a viable solution to be adopted when the engine manufacturer is looking for extrapower from any existing type of combustion engine. The solution is simple, elegant and compact, which can be realized with the existing technology. By analyzing the numerical simulation we may pull the conclusion that the existence of the second compression stage rotor is greatly improving the output pressure of the device and is consistently shortening the reaction time.

The surface hardening by induction heating has many advantages over other methods of conventional thermal processing. It is known that this method is applied to achieve high hardness in the surface layer maintaining a resilient core. The implementation of the required thermal cycle depends both on the characteristics of the material undergoing processing and of the parameters of the system of induction impact. Some difficulties arise in high-frequency hardening of internal cylindrical surfaces of ferromagnetic joints with relatively small diameters, as there is a pronounced the Ring effect, leading to displacement of the eddy currents in the detail and to reduce the efficiency, and hence the quality of the products. The purpose of this work is to study the technological aspects of the induction hardening of internal rotary surfaces.

The paper shows some theoretical and experimental aspects with reference to the superficial processing using electrical sparking. The tests objective was the superficial processing through sparking process on alloy and non alloy steel samples using a sinter carbide W and Ti electrodes type WCo8, Ti15Co6. The paper shows metallographic analysis on sparking superficial layers. The analysis was made on NEOPHOT 32 (special microscope) and MC-2 and MC-6 (metallographic microscope). Optic metallographic analyses of sparking superficial layers obtained using “hard” carbide electrodes W and Ti sinterysed had as a result a white layer resistant at normal chemical reactive attack on sample surface. Under this layer a transition zone will form which is obvions at hardened proofs and under “hard” working condition.