In order to comply with new emission regulation set by IMO (International Maritime Organisation) the international shipping is required to reduce fuel consumption much lower than the current consumption level. As per the IMO new energy efficiency regulations 21 a 300000 DWT tanker built after January 2013 is not permitted to exceed 1 gm of fuel consumption for carrying 1 ton cargo a distance of 1 nautical mile. However, present fuel consumption of a HFO operated diesel engine is much higher than this amount. To address this issue of excess fuel consumption new design solutions are constantly being searched by the marine industry. Among many alternative technology options available the one which is drawing greater attention of ship designers is the waste heat recovery using Combined heat and power (CHP) concept that integrates the production of usable heat and power (electricity), in one single, highly efficient process. CHP systems link the Diesel engines with other heat engines, such as gas and steam turbines. In this paper authors present report of feasibility study of using waste heat recovery to improve fuel efficiency of a proposed diesel powered LNG tanker in future. The primary focus of this paper is to provide a better understanding of the options available for waste heat recovery from slow speed 2 stroke turbocharged diesel engine and its use in various applications on-board ships to improve fuel economy and environmental compliance.
Department of Marine Engineering, Malaysian Maritime Academy, Malaysia
Maritime Technology Program, School of Ocean Engineering (PPKK), UMT, Malaysia
Pusher-Barge System (PBS) in which multiple barges are connected together and pushed by a powerful pusher has been one of important transportations for river services. Yasukawa et al. [1] and Koh et al. [2] conducted captive model tests with various pusher and barge configurations and investigated the maneuverability of PBS. In those studies, they discussed about the maneuvering motion only in calm water. However, considering PBS used in a river in reality, the discussion about maneuverability of PBS in a river flow should be required for the navigation safety. So in this study, the authors aim to investigate maneuverability of PBS in a uniform river flow based on maneuvering simulation. The maneuvering mathematical model was based on MMG model and the uniform river flow velocity was considered into the motion equations. The simulation result shows the ship has a different turning ability between when heading for the upstream and downstream and the amount of drift depends on the barge configurations.
School of engineering, Hiroshima University, Japan
Continuous assessment of aged offshore structures is becoming extremely important to avoid any hazardous consequences throughout their design life. In Malaysian waters where most of the offshore structures are jacket platforms, it was found out that many of these structures are currently operating beyond the design life. With on-going corrosion being taken place, structure reliability and operation will be affected. Therefore, this study focuses on the reassessment of an existing aged offshore jacket platform in Malaysian waters by considering corrosion effect. Pushover analysis is carried out to determine the ultimate strength of the jacket platform by quantifying the Reserve Strength Ratio (RSR) value. To simulate the corrosion effect, two different time-dependent corrosion wastage models are applied to the jacket platform. The results developed in the present study will be useful for future study in predicting and modeling corrosion tolerant for offshore jacket platforms.
Ocean and Ship Technology, Department of Civil and Environmental Engineering, Universiti Teknologi PETRONAS, Perak, Malaysia
School of Ocean Engineering, Universiti Malaysia Terengganu, Terengganu, Malaysia
Graduate School of Engineering Mastership, Pohang University of Science and Technology, Pohang, Republic of Korea
Micro-controller is a system of functional computer in a chip. There are cores of processor in it, memory ( a small number of RAM, program memory, or both of them ) and input-output equipment. The wares like this is combined by Pneumatic system become a series of systems which work by using control system through arduino uno series mechanism that managed by micro-controller, therefore it has regular movement according calibration which used when water of rain wet the sensor. Translation movement from piston could spread the umbrella through valve setting and force calculation and the direction of air flow based on the physics theory, with a minimum of air pressure, then umbrella’s movement managed according with system needs. Pneumatic umbrella could operate with quantity of air usage in single cylinder Q = 0,3925 m/seconds. Single cylinder type is chosen 50 mm as many as one, the length of piston’s step is 500 mm with umbrella’s expanse 3 metres.
Engineering Faculty of Kalimantan Islamic University, Indonesia
One important question appear when design construction completed and before it to be made is how long the lifetime of the construction later. Especially if that involve huge investments. Fatigue testing is the one manner to determine lifetime mainly for the construction where encounter cycle loading still in the range at the elastic of material. Four points bending fatigue testing machine became choice because, in this system, the material test would be in the uniform of bending moment without affected load from direction else that was hoped to predict the fatigue life of material accurately. In addition to design, product, and assembling, these fatigue machine was expected to be used in prediction the fatigue life of much material structure using in Riau Province. There need to be investigated in properly any of approach to predict a useful life of structure such as building, ship bridge due to operational area was a peat water environment of the rivers and a land. In this study focus would be come to predict fatigue life onto material structure while dominant applied in steel construction and ship production.
Mechanical Departement, Engineering Faculty, Universitas Riau, Indonesia
Wing in ground effect craft are becoming promising transportation over the last decade. This paper objectively reviews the current state of knowledge of stability wing in ground effect craft. It encompassed the definition of the phenomenon, the importance of the stability, the area of the studies including aerodynamic during take-off, cruises, and landing. This paper focuses on the stability development of the WIG craft, including recent safety regulation. It also covered a more details on the wing parameters such wing type, anhedral angle, wing tip and endplate. The finding shows that the current developments of the stability criteria still not mature and there is still room for improvement, particularly on transverse or lateral stability of WIG, where it plays important roles in the safety aspect. It is crucial to understand the stability and its component in order to avoid the unforeseen accident.
Faculty of Science and Defense Technology, Universiti Pertahanan Nasional Malaysia, 5700 Kuala Lumpur, Malaysia
Marine Technology Centre, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
Aeronautical Laboratories, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
Drying is a method or process to remove or eliminate some of the water of a substance by evaporating using thermal energy and can be done by various methods such as sun-drying or drying using solar, artificial drying such as oven, spray drying, vacuum drying, etc., and also drying by freezing. Drying by using solar and artificial drying such as with oven and others can be changing the structure, color and nutrients of the dryied material. Freeze vacuum drying method is an optimum process to dry the product without changing the physical and chemical properties of materials, even drying with freeze vacuum drying are can be maintain the structures, nutrient, and colors of original substances. The aim of this research is to develop and analyze a shelf-rise freeze vacuum drying system where the capacity of freeze vacuum drying is 250 gr of dryied product with pressure and temperatures ranging from -70 to -75 mmHg and -5 to -7°C, respectively. Yam bean is used as the product to be dryied by the time variation of freeze vacuum drying process up to 5 hours. This research was result the water content losses in yam bean are up to 80%..
Conversion Energy Laboratory, Mechanical Engineering, Universitas Riau, Indonesia
Power fluctuation of a grid-connected photovoltaic (PV) system can give unnecessary stress and impacts to the point where it is connected. Integration of battery energy storage (BES) system is one feasible way of reducing such stress and impacts. To minimize the output power fluctuation, a hybrid PV/BES system can be developed and controlled so that the total output of the system is smoothed out and dispatched on an hourly basis to the electricity grid. For such a power fluctuation mitigation strategy, lithium-ion battery can be an attractive solution for the battery storage because of its longer lifespan, higher power density and outstanding power discharge performance. This paper presents optimal control of lithium-ion battery-based PV system hourly output power dispatch using the State-of-Charge Feedback (SOC-FB) control strategy. The SOC-FB control system is optimised by using particle swarm optimization algorithm to ensure an optimal dispatch of the PV/BES system while maintaining the BES operational constraints such as SOC limits, charge/discharge current rate, voltage limits and battery capacity at the desired range. Simulation study were carried out using Matlab/Simulink software with the simulation results show acceptable performance of the proposed hybrid PV/BES hourly power dispatch control strategy.
School of Ocean Engineering, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia
Offshore structures are subjected to the nonlinearities of random wave loading due to the drag component of Morison’s force and the effect of current and load intermittency on the members in the splash zone, the response is often non-Gaussian. The most accurate and versatile technique for predicting the statistical properties of extreme responses on such condition is the Monte Carlo (MC) time simulation technique, however it is computationally very demanding as reliable results require a very large number of simulations. In the current finding, modified finite-memory nonlinear system (MFMNS) is much more efficient than the MC time simulation technique. However, no attempt has been made to model the residue between the extreme values from MC time simulation and the approximate MFMNS techniques. Hence, there could be significant improvement in the predicted extreme values for low intensity sea state, thus leading to more accurate predictions of the 100-year responses.
UTM Razak School of Engineering and Advanced Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100 Kuala Lumpur, Malaysia
Under the 10th Malaysia Plan, National Defense University of Malaysia (NDUM) has developed a new naval architecture laboratory to suit the requirement as a niche and boutique university for new knowledge and competencies in defense related disciplines. This paper describes the optimal specification and design of a wave test flume in a confined space. The wave maker was specified with the constraints of limited budget and space, therefore optimization of the generated waves for this particular flume is paramount. The wave flume finally constructed to the specification is capable of producing regular and irregular waves controlled by computer programs, and is able to provide data logging. Result shows that the final design is a result of objective oriented design simplicity, but producing very accurate and effective results for a range of research and studies. The wave flume design also provides a basis to expand the facility to allow towing tests, as and when space allows.
Faculty of science and defense Technology, National Defence University of Malaysia, 57000 Kuala Lumpur Malaysia
Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Skudai, 81310 Johor, Malaysia
Omey Labs Ltd. Unit A5, Naas, Co. Kildare, Ireland
