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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

Author-ID : 2556479

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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PERENCANAAN AWAL TATA LETAK GALANGAN KAPAL DI DAERAH KAWASAN LAHAN TERBUKA Meitha Soetardjo; Ede Mehta Wardhana; Ahmad Bisri
TEKNOLOGI DITERAPKAN DAN JURNAL SAINS KOMPUTER Vol 1 No 1 (2018): June
Publisher : Unusa Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33086/atcsj.v1i1.10

Selama beberapa dekade, negara-negara Asia seperti Korea, Jepang dan China telah memimpin industri pembuatan kapal sejak kemunduran di Eropa dan Amerika. Namun, beberapa negara berkembang seperti Indonesia, India, Brazil, dan lain-lain akan masuk juga ke industri perkapalan.Negara-negara berkembang ini menemukan mitra teknis atau penyedia informasi karena mereka berada dalam situasi pengalaman dan teknologi kecil. Kini, perusahaan pengembang galangan kapal dari negara-negara maju pembuatan kapal mendapatkan kesempatan untuk melakukan bisnis rekayasa melawan negara-negara berkembang tersebut......seperti rencana pemodelan klaster industri perkapalan di Surabaya dan sekitarnya.Titik awal dari model bisnis ini adalah untuk pembangunan galangan kapal baru. Model bisnis ini diawali dengan desain layout galangan kapal. Untuk pelaksanaan desain tata letak galangan kapal, dibutuhkan empat jenis komponen rekayasa.Komponen tersebut adalah teknik sipil, teknik bangunan, rekayasa utilitas dan teknik tata letak produksi. Di antara bagian-bagian ini, teknik tata letak produksi paling penting karena hasilnya adalah pondasi dari bagian teknik lainnya dan ini menentukan kapasitas galangan kapal selama siklus operasi kapalUntuk desain tata letak galangan kapal berada di luar jangkauan persyaratan bisnis karena sebagian besar kasus penelitian hanya ada sedikit pertimbangan tentang perkapalan yang nyata.Dalam tulisan ini, desain tata letak galangan kapal untuk tahap awal dilakukan untuk target galangan kapal yang baru direncanakan dengan metode terpadu yang mampu menangani data master aktual dari galangan kapal.Tulisan / penelitian, metode perancangan tata letak ini dibedakan dari penelitian terdahulu karena data produk aktual dari kapal dan data operasi pembuatan kapal aktual digunakan untuk estimasi area.

Modifikasi Desain Sistem Ventilasi Kamar Mesin KMP. Tanjung Sole Hario Pramudito; Alam Bahermasyah; Ede Mehta Wardhana
Jurnal Teknik ITS Vol 8, No 2 (2019)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

KMP. Tanjung Sole merupakan salahsatu kapal (sister ships) yang dibangun untuk melayani rute pelayaran di wilayah Timur Indonesia. Tidak seperti sister ship-nya, pada saat KMP. Tanjung Sole beroperasi terjadi kenaikan temperatur udara kamar mesin yang melebihi ambang batas persyaratan yaitu di atas 45 0C. Perbedaan KMP. Tanjung Sole dengan sister ship-nya hanyalah pada tata letak permesinan di dalam kamar mesin dan desain ducting dari sistem ventilasi kamar mesin. Untuk mencari solusi permasalahan dari KMP. Tanjung Sole tersebut maka dilakukan evaluasi dan simulasi beberapa alternatif desain serta tata letak ducting sistem ventilasi kamar mesin kapal tersebut. Simulasi dilakukan dengan pendekatan CFD (Computational Fluid Dynamic) guna menganalisa sebaran temperatur dan aliran udara ventilasi di dalam kamar mesin, baik sebelum dilakukan perubahan desain ventilasi maupun sesudahnya. Ada tiga alternatif desain sistem ventilasi yang ditawarkan dan dikaji. Dari hasil simulasi yang dilakukan untuk sistem ventilasi terpasang di KMP. Tanjung Sole diperoleh data distribusi temperatur rata-rata udara di dalam kamar mesin adalah sebesar 54,3 °C – mendekati kondisi riil di kapal. Setelah dilakukan perbaikan desain ducting sistem ventilasi maka dengan menggunakan desain alternatif atau variasi 1 temperatur udara di kamar mesin turun menjadi 47,6 °C. Adapun pada variasi 2 dan variasi 3 temperatur udara kamar mesin KMP. Tanjung Sole turun menjadi 43,5 °C yang mana ini berarti sudah memenuhi persyaratan. Perbedaan dari variasi 3 dengan variasi 2 hanya pada adanya ducting penghubung dan damper antara sistem ventilasi sisi kanan dengan sisi kiri kamar mesin yang mana masing-masing disuplai oleh satu fan. Hasil kajian menunjukkan alternatif sistem ventilasi yang paling baik digunakan untuk mengatasi permasalahan temperatur udara kamar mesin KMP. Tanjung Sole adalah model variasi ke-3.

Flashpoint and Flame Spread Analysis of Material Coconut Fiber (Cocus Nucifera) Using Chemical Treatment of Alkali NaOH as a Sound Absorber Material in Ship Alam Baheramsyah; Ede Mehta Wardhana; Nasa dityas Fariz Pradani
International Journal of Marine Engineering Innovation and Research Vol 6, No 1 (2021)
Publisher : Institut Teknologi Sepuluh Nopember

The use of sound absorbers on many ships made from glass wool. Glass wool has a negative impact on health, which can irritate the skin and disrupt the respiratory system. Therefore, it is necessary to have an alternative sound insulation material that is eco-friendly which has capabilities comparable to glass wool, and can also be used as heat insulation on ships. These alternative ingredients are materials from natural fiber. This research made sound absorbers using coconut fiber by soaking fiber into an alkali NaOH solution. Materials are selected based on density, economic value, and ease in the manufacturing process. The sound absorbers are modified using coconut fiber which is given a soaking treatment of alkaline NaOH solution and distilled water with a percentage of 15%. Soaking aims to remove lignin content and improve the mechanical properties of coconut fiber. In this research, 9 variations were made with different compositions. Tests are based on ASTM E84 to determine the flashpoint value and the safe flame spread on the ship. From the test results, it was found that coconut coir material was given a soaking treatment of alkaline NaOH solution with a percentage of 15% for 2 hours with a density of 0.3 gr/cm3 and thickness 30 mm and using a polyurethane adhesive. The time to reach the flashpoint is 20.45 seconds and the average temperature of flame spread is low when compared to other specimens including glass wool. The conclusion obtained is that the sound absorbers are safe when used on a ship.

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 : Institut Teknologi Sepuluh Nopember

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 : Institut Teknologi Sepuluh Nopember

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.

Coolbox Design Modification for Traditional Fishing Vessel Using Sengon Wood Sawdust and Potassium Hydroxide-Soaked Coconut Coir Ede Mehta Wardhana; Alam Baheramsyah; Hilmy Yassar
International Journal of Marine Engineering Innovation and Research Vol 5, No 1 (2020)
Publisher : Institut Teknologi Sepuluh Nopember

This research modified coolbox by mixing sengon wood sawdust and potassium hydroxide-soaked cocofiber. By considering its composition, potassium hydroxide content, and soaking duration, this research was done to find the optimum amount of those three variables to make the best insulator. The best insulator was chosen based on its thermal conductivity, density, and economic value, and the easiness in the making. From the experiment, the chosen composition consists of 30% sengon wood sawdust and 70% potassium hydroxide-soaked cocofiber with content of 15% and soaking duration of 2 hours. With thermal conductivity of 0,352W/mK, density of 0,303gram/cm3, and specimen production cost of Rp607,41, this material was used for composition reference in the making of the coolbox. The experiment of coolbox lasted for 35 hours with 71 temperature data retrievals. The coolbox experiment used 500 gram tuna fish and 2500 gram ice as cooler. The result showed that the lowest temperature for ice inside coolbox was 0,3°C, the lowest temperature of fish was 5°C, and the lowest temperature in coolbox chamber is 17°C. With the ratio of 1:5 for fish and ice, the coolbox insulation using sengon wood sawdust and potassium hydroxide-soaked cocofiber was able to maintain fish temperature below 20°C for 27,5 hours. Meanwhile, the styrofoam coolbox was able to maintain fish with the same condition for 35 hours.

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 : Institut Teknologi Sepuluh Nopember

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).

Cooling System Design for Cold Storage of Traditional Fishing Boat Using Insulation from Rice Husk Muhammad Abidin Abidin; Alam Baheramsyah; Ede Mehta Wardhana
International Journal of Marine Engineering Innovation and Research Vol 3, No 1 (2018)
Publisher : Institut Teknologi Sepuluh Nopember

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.

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 : Institut Teknologi Sepuluh Nopember

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.

Analysis of Gottingen 428 Airfoil Turbine Propeller Design with Computational Fluid Dynamics Method on Gravitational Water Vortex Power Plant Ede Mehta Wardhana; Agoes Santoso; Asep Rahmat Ramdani
International Journal of Marine Engineering Innovation and Research Vol 3, No 3 (2019)
Publisher : Institut Teknologi Sepuluh Nopember

Along with technological development and the increase in human population, the electricity needs are increasing every year. However, 94% of power plant in Indonesia still using fossil fuels that are pollutant and non-renewable. In addition, NASA said that the earth's temperature had risen by 1°C since 1880 and the current carbon dioxide level was the highest in the last 650,000 years. Therefore, Indonesia need to improve, in fact Indonesia is one of the highest emission contributors in the world. Indonesia is not yet 100% electrified, there are still 2,519 villages without electricity. Gravitational Water Vortex Power Plant (GWVPP) which is a micro hydro-power plant may answer the problem, because it is an easy renewable energy to be made and utilized in the NIZ (not interconnected zones) region. This study will examine the changes in the number and shape of the blade, as well as the length of the chord, to know the effect on turbine power so that it can produce higher efficiency at GWVPP. Propeller turbine with a Gottingen 428 airfoil analyzed using Computational Fluid Dynamics (CFD) method. The results show that the number of blades and the length of the chord is inversely proportional to the efficiency of the turbine, and the shape of blade is more efficient when it’s twisted.

Co-Authors Agoes Ahmad Masroeri Agoes Santoso Agoes Santoso Agoes Santoso Ahmad Bisri Ahmad Bisri Alam Baheramsyah Alam Bahermasyah Asep Rahmat Ramdani Bella Puji Darma Samodra Brivo Rafanki Danang Jawara Ditya Farhan Ilyasa Hario Pramudito Hilmy Yassar Juda Imanuel Osvaldo Panggabean Meitha Soetardjo Meitha Soetardjo Meitha Soetardjo Muhammad Abidin Abidin Muhammad Azis Husein Nasa dityas Fariz Pradani Puteri Ladikha Sihombing Ribhi Naufal Azmi Semin Semin Sutopo Purwono Fitri Taufik Fajar Nugroho Wolfgang Busse

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