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All Journal Jurnal Teknik ITS Applied Technology and Computing Science Journal International Journal of Marine Engineering Innovation and Research Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Ede Mehta Wardhana
Departemen Teknik Sistem Perkapalan Institut Teknologi Sepuluh Nopember
Aerospace Engineering Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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Coolbox Design for Traditional Fishing Vessel Using Sengon Wood (Paraserianthes falcataria (L.) Nielsen) Sawdust and Rice Straw Insulation Alam Baheramsyah; Ede Mehta Wardhana; Puteri Ladikha Sihombing
International Journal of Marine Engineering Innovation and Research Vol. 3 No. 2 (2018)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v3i2.6064

Abstract

Increased production of Indonesia catch fish accompanied by increased coolbox using to maintain freshness of fish. The efforts to maintain freshness of fish during this time is use a coolbox made from styrofoam which is not environmental friendly. Therefore, it is need to make cool box with environment friendly material and also effective for fish preservation . In this research, coolbox is modified with insulation based on Sengon wood sawdust (Paraserianthes falcataria (L.) Nielsen) and rice straw. Using the sawdust of sengon wood and dried straw pieces , experiments conducted to get the best composition of insulation, insulation variated with 2 different adhesives, PVAc and polyurethane .The results of the density test and thermal conductivity test, also in terms of preparation of various insulation variations, show that insulation with 66% sawdust of sengon wood; 28% straw; and 6% polyurethane adhesive is the best insulation to be used in coolbox, with thermal conductivity of 0.54 W / mK and density of 0.38 gr / cm3. The experiment in coolbox is done for 24 hours with 48 times data retrieval. Used ice cubes with a mass of 2.0 kilograms and 400 grams tuna fish. The experimental results show the minimum temperature that can be achieved coolbox is -0.1 ° C below the surface of ice .In fish body, the lowest temperature that can be achieved is 3, 2 ° C. While in the coolbox room, the lowest temperature is 19.4 ° C. The results also show coolbox with sengon sawdust and rice straw insulation able to preserving fish for 15 hours, with weight ratio between fish and ice is 1: 5.
Analysis of Palm Fiber and Coconut Coir Usage as Purse Seine Cargo Chamber Insulator Alam Baheramsyah; Ede Mehta Wardhana; Muhammad Azis Husein
International Journal of Marine Engineering Innovation and Research Vol. 3 No. 1 (2018)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v3i1.6068

Abstract

Indonesia's annual marine fish potential of 6.5 million tons is spread over the waters of Indonesia's Exclusive Economic Zone. The constraint of which are often faced by fishermen is the decay that occurs during the storage process in which the fish becomes less fresh when it comes to the fish auction. The decomposition rate of fish after fishing is strongly influenced by fishing techniques, handling techniques, and onboard storage. The cooling or freezing process is the best method chosen for handling the catched fish to maintain its quality and freshness. This study was conducted by modifying the insulation material of purse seine cargo hold using a coolbox made of insulated materials from coconut coir and Palm Fiber. The purpose of this study is to know the influence of coconut coir and Palm Fiber composite insulation to temperature and cooling time in which will be compared with styrofoam insulated coolbox. The study was conducted by testing some specimens which will be selected with the thermal conductivity and lowest density. The compositions which is chosen were coconut coir and Palm Fiber composite that is mixed with polyurethane glue 4:4:1 ratio, having a thermal conductivity of 0.4643 W/mK and a density of 0.18 g/cm3. Coolbox's test using coconut coir and Palm Fiber composite insulation was done using a 400 gram fish as a cooling load and ice that had been destroyed weighing 2 kilograms as a cooling source. Coolbox with coconut coir and Palm Fiber composite insulation has the lowest fish temperature of 0.7oC, while the coolbox with styrofoam insulation has the lowest fish temperature of 1.8oC. In addition, coconut coir and Palm Fiber composite coolbox is able to keep temperature below 20oC for 16,5 hours, while with the same treatment styrofoam insulated coolbox is only able to keep the temperature below 20oC for 16 hours. So it can be concluded the use of coconut coir and Palm Fiber composite is effective as insulation material because it can offset the performance of the insulation styrofoam.
Cooling System Design for Cold Storage of Traditional Fishing Boat Using Insulation from Rice Husk Muhammad Abidin; Alam Baheramsyah; Ede Mehta Wardhana
International Journal of Marine Engineering Innovation and Research Vol. 3 No. 1 (2018)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v3i1.6079

Abstract

Quality of fish is an important factor and determines the high selling price of fish in the market. In achieving that it will require proper handling in the process of cooling the fish before it is sold. To keep the freshness of the fish, fishermen usually use Styrofoam-based coolbox as its isolation. In this study modify coolbox using rice husk which serve as insulation on coolbox. This study aims to determine the effect of insulation using rice husk over time and temperature which will be compared with Styrofoam coolbox. Before the experiment, the first thing to do is to test the composition of rice husk with white cement. Where is the best composition to be used as insulation on coolbox. The tests are thermal conductivity, density, and flexural strength tests. From the test results obtained the best composition of rice husk and white cement is 1: 1 which has a thermal conductivity (0.746 W / mK) and density (0.32 gr / cm3) better than other compositions. In the experiments performed using 3 kg of wet ice it was found that in 24 hours cooling time, the rice husk coolbox had the lowest temperature of 13.5 ° C and the lowest Styrofoam coolbox temperature was 10.6 ° C.
Stress Analysis of Land Subsidence Effect on Header Pipe 12 Inch in LPG Station Semarang Taufik Fajar Nugroho; Ede Mehta Wardhana; Ribhi Naufal Azmi
International Journal of Marine Engineering Innovation and Research Vol. 2 No. 4 (2018)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v2i4.6083

Abstract

In the process of distributing LPG to all regions in Indonesia, LPG stations have an important role. In operation, LPG stations may have hazards caused by environmental conditions such as pipe fatigue (fatigue) due to geotechnical forces or failure of components in the system. Research case of piping systems used pipe stress analysis. The purpose of this analysis is to know the deflection of the pipe, the loads that occur by the pipe, and the safety of the pipe and its support. This analysis refers to the code or standard ASME B31.3 where the stress analysis is performed using software. In the process of pipe modeling, there are variations of loading such as pressure load variation, wall thickness and elevation of soil degradation value. From the results of calculation and simulation pipe stress analysis using software can be seen that header pipe 12 inch at LPG station of Semarang is NOT stress, so it is safe to be use. The thickness of the pipe allowed for to be unstable when the operating pressure is greater than 0.15 inch, and the operating pressure allowed for the pipe to be unstable at a thickness of 0.4 pipe (schedule 40) is less than 725 Psi (50 Bars).
Heat Transfer Analysis of Thermal Oil Plant on Fuel Oil Tanks of 17500 LTDW Product Oil Tanker Taufik Fajar Nugroho; Wolfgang Busse; Ede Mehta Wardhana; Juda Imanuel Osvaldo Panggabean
International Journal of Marine Engineering Innovation and Research Vol. 2 No. 2 (2018)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v2i2.6119

Abstract

The thermal oil system is one type of heater that widely used on ships. The system is an important system used to heat fuel that will be used for the operation of the main engine, auxiliary engine, and boiler. This system has been installed on 17500 LTDW Product Oil Tanker, MT. Parigi, but not yet tested so that it does not know whether the system is able or not to transfer heat from heating equipment (boiler and economizer) to each fuel tank in accordance with the desired value. Therefore, this research performs an engineering evaluation in term of heat transfer analysis to ensure that the heat transfer process of thermal oil from heating equipment to the fuel tanks is already meeting the required temperature or not. This analysis is done by using thermodynamic equation, namely heat balance equation and heat loss equation. The result shows that the heat transfer of thermal oil to each fuel tank corresponds to the desired value, namely 180oC for the thermal oil inlet temperature to each fuel tank and 140oC for the thermal oil re-enter temperature to the heating equipment.
The Effect of Manhole Form on Double Bottom Ship Construction Rudianto; Ede Mehta Wardhana; Jangka Rulianto; R Puranggo Ganjar Widityo; Ansori
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 2 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i2.6466

Abstract

The ship's hull construction must withstand all loads, be made as light as possible and comply with regulations. The purpose of this study was to determine the maximum strength limit of double bottom ship construction with manhole form variations. Research design for this study; literature studies, field studies, and simulations using ANSYS. The results of the existing double model structure strength values for the maximum stress values in the sagging hogging state are 236.60 MPa and 154.18 MPa. Von Mises stress values are 227.94 MPa and 136.26 MPa. The shear stress values are 131.5 MPa and 77.36 MPa. The maximum deformation is 0.0049 m, and the safety factor is 1.346. The total construction weight is 201.83 metric tons. The best results of the analysis of variation were found in Model B1, which changed the hole ratio from 0.75 to 0.6 and increased the hole dimension by 200 mm. The maximum stress values of Model B1 in the sagging-hogging condition are 186.93 MPa and 141.54 MPa. Von Mises stress values are 238.72 MPa and 184.82 MPa. The shear stress values are 113.37 MPa and 137.42 MPa. The safety factor is 1.337 m, and the maximum deformation is 0.0034 m.
Co-Authors Achmad Taufik Rendi Kisserah Agoes Ahmad Masroeri Agoes Santoso Agoes Santoso Ahmad Bisri Ahmad Bisri Alam aheramsyah Alam Baheramsyah Alam Bahermasyah Ansori Asep Rahmat Ramdani Bella Puji Darma Samodra Brivo Rafanki Danang Jawara Ditya Farhan Ilyasa Hario Pramudito Hilmy Yassar Hilmy Yassar Jangka Ruliyanto Juda Imanuel Osvaldo Panggabean Meitha Soetardjo Meitha Soetardjo Meitha Soetardjo Meitha Soetardjo Muhammad Abidin Muhammad Abidin Abidin Muhammad Azis Husein Muhammad Azis Husein Nasa Dityas Fariz Pradani Nasa dityas Fariz Pradani Puteri Ladikha Sihombing R Puranggo Ganjar Widityo Ribhi Naufal Azmi Ribhi Naufal Azmi Rudianto Semin Semin Semin Sutopo Purwono Fitri Sutopo Purwono Fitri Taufik Fajar Nugroho Wolfgang Busse Wolfgang Busse