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All Journal Jurnal Teknik ITS International Journal of Marine Engineering Innovation and Research Jurnal Bluefin Fisheries

Semin Semin

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Author-ID : 2776239

Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Articles

Prediksi Performa Linear Engine Bersilinder Tunggal Sistem Pegas Hasil Modifikasi dari Mesin Konvensional Yamaha RS 100CC Fakka Kodrat Tulloh; Aguk Zuhdi Muhammad Fathallah Fathallah; Semin Semin
Jurnal Teknik ITS Vol 2, No 2 (2013)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Linear engine adalah salah satu inovasi dari engine yang dikembangkan karena memiliki performa yang lebih baik bila dibandingkan dengan mesin konvensional. Peningkatan performa yang dialami karena berkurangnya gaya gesek yang terjadi. Sehingga perlu dilakukan pembuktian untuk mengetahui performa linear engine hasil modifikasi dari mesin konvensional Yamaha RS 100 CC dengan cara memprediksi melalui simulasi. Dalam analisa ini akan dibandingkan performa mesin konvensional dengan linear engine dalam bentuk perbandingan tekanan dengan volume, daya, torque, BSFC, Brake efficiency dalam variasi kecepatan antara 3.2 m/s – 19.2 m/s. Hasil penelitian menunjukan bahwa performa yang dihasilkan linear engine hasil modifikasi tersebut meningkat. Daya maksimal dari linear engine meningkat sekitar 7.2% dari daya sebelumnya 6.9 kW menjadi 7.4 kW. Begitu juga torque yang dihasilkan meningkat menjadi 12.4 N/m , selain itu BSFC dari linear engine mengalami perbaikan sekitar 2 – 10% dari BSFC sebelumnya.

Shaft Twist Moment Analysis of Turbocharger ABB Type VTR 354 Due to Surging Phenomenon Beny Cahyono; Aguk Zuhdi Muhammad Fathallah; Istiqomah Istiqomah; Semin Semin
International Journal of Marine Engineering Innovation and Research Vol 4, No 3 (2019)
Publisher : Institut Teknologi Sepuluh Nopember

Surging is a phenomenon in which the airflow back toward of the compressor side. This case is known by excessive sound or vibration in the turbocharger. The main cause of surging phenomenon is divided into two types, that is failure operation by crew and improper selection turbocharger by the designer. This research identifies the effect of surging on twisting moment of turbocharger shaft ABB type VTR 354 on Niigata 8MG40X engine. The method is using simulation based on Finite Element Method (FEM), start from determining the compressor and turbine torque then preparing the turbocharger shaft and simulation with SolidWorks. It is found that critical area caused by surging is located on compressor seat. The largest torque difference at 50% of the engine load about -1.304 Nm and maximum stress is about 0.015906 Mpa, while the displacement is about 0.0000270028 mm and the maximum strain is about 6.26693e-008 mm/mm. Thus, the shaft material 17NiCrMo6-4 is considered capable of dealing with surging on the turbocharger.

Effect of the Piston Crown Contour on the Fluid Flow of Diesel Engine using Biodiesel B30 Based on Simulation Semin Semin; Beny Cahyono; Taruno Ganggas Daruadji Baskoro
International Journal of Marine Engineering Innovation and Research Vol 5, No 4 (2020)
Publisher : Institut Teknologi Sepuluh Nopember

Diesel engines are categorized into internal combustion engines. On the internal combustion engine, combustion occurs in the combustion chamber. The combustion process requires three main elements: fuel, air, and heat from compression. The combustion process on the internal combustion engine will affect engine performance or emissions. The engine used is Yanmar TF85MH, one cylinder, four-stroke, direct-injection with B30 fuel palm oil. This study analyzes the effect of the piston bowl depth on the resulting fluid flow. To get the data, the author using the ANSYS software. The current piston bowl depth is 15,5 mm. In this study, model variation with addition and reduction of +2, +1, 0, -1, and -2 (in mm). The results of the simulation show that the highest swirl ratio occurs in case 5 with a value of -1,15, the highest temperature occurs in case 4 with a value of 2373˚K, and the highest heat release rate occurs in case 4 with a value of 3,25x108 erg/degree.

Analysis of Three Phases Asynchronous Slip Ring Motor Performance Feedback Type 243 Sardono Sarwito; Semin Semin; Achmad Suherman
International Journal of Marine Engineering Innovation and Research Vol 2, No 1 (2017)
Publisher : Institut Teknologi Sepuluh Nopember

Induction motor is an Alternating Current Electric Motor (AC), this motor most widely used. There are two types of rotor on three-phasess asynchronous motor, the squirrel-cage rotor and the slip ring rotor. Every motor has its own characteristic, it have been affect the used of the motor. In this research is aiming to know three-phasess asynchronous slip ring motor performance on unloaded and loaded condition. On its condition, the variation resistance starting from 0Ω - 25Ω. The results of three-phasess asynchronous slip ring motor on unloaded condition having maximum output power 58 W and maximum torque 0.22 Nm in 25Ω of resistance. While in the condition loaded having a maximum Pin 131,5 W, maximum Pout 109,31 W, maximum torque 2,08 Nm and maximum efficiency 95%. The analysis was done by knowing the relation between torque vs speed and efficiency vs load. The result shows that the increasing of motor speed have been give affect the decreasing of motor torque in according with the torque formula. In the other result, it can be seen that increasing of the load, efficiency have been increase

HAZOP Study and SIL Verification of Fuel Gas System in ORF Using IEC 61511 Standard and FTA Method Nurhadi Siswantoro; Dwi Priyanta; Afanda Dwi Ragil Risnavian; M. Badrus Zaman; Trika Pitana; Hari Prastowo; Semin Semin
International Journal of Marine Engineering Innovation and Research Vol 7, No 1 (2022)
Publisher : Institut Teknologi Sepuluh Nopember

Safety is an important aspect of the industrial process. Failure of system and mechanism endanger both human and environmental safety. Safety is obligated to be implemented precisely and thoroughly to prevent failure consequences. One of the preventive implementations is to map out safety devices in the form of SIS (Safety Instrumented System) and other layers of protection. However, to acknowledge this safety device performance used SIL (Safety Integrity Level). This final research is intended to analyze Fuel Gas systems on Onshore Receiving Facilities (ORF). HAZOP (Hazard Operability Study) as process hazard analysis with deviation during the operation so that the risk level is known. SIL verification towards SIL target is SIL-2 refer to IEC 61511 standards by FTA (Fault Tree Analysis) method. From the HAZOP study can be concluded that over-pressure becomes a top hazard to all nodes due to the most severe consequences, the highest likelihood (medium risk). The calculation result of PFDavg is Node 1 (Fuel Gas Scrubber V-6060) is 6,22E-03, Node 2 (Fuel Gas Filter Separator S-6060A) is 1,24E-03, Node 3 (Fuel Gas Filter Separator S-6060B) is 1,24E-03, Node 4 (Fuel Gas Superheater E-6060) is 1,21E-03, and Node 5 (Instrument Gas Receiver V-6070) is 2,23E-03. The conclusion of this research shows that five components of the Fuel Gas System fulfill the SIL-2 target, therefore, doing a re-design to add a safety device is unnecessary

Analysis of the Performance of Diesel Engine Fueled using B50-B100 Biodiesel Based on Simulation Semin Semin; Beny Cahyono; Himmawan Aan Listyanto; Rosli Abu Bakar
International Journal of Marine Engineering Innovation and Research Vol 5, No 3 (2020)
Publisher : Institut Teknologi Sepuluh Nopember

This alternative research fuels in the form of biodiesel from waste cooking oil. In addition, the purpose of this study is to determine the effect of waste cooking oil biodiesel blends in the performance testing of a one-cylinder diesel engine simulation modeling. The method used by the author in this study is to use a simulation method. Performance-based diesel motor performance tests are performed using HSD, and also with variations of used cooking oil biodiesel fuel mixtures. From the performance test results at full load, it was found that the comparison of the value of the power mix of biodiesel waste cooking oil with HSD decreased power. At B50 decreased power (6.38%), B60 (7.6%), B70 (8.9%), B80 (10.2%), B90 (11.4%), and B100 (12.7%) at maximum RPM. The torque value obtained in the biodiesel fuel mixture also decreased compared to HSD in the same cycle. The lowest SFOC value is produced by HSD fuel. SFOC HSD value is lower than cooking oil biodiesel mixture which is higher (6.8%) B50 fuel, up (8.3%) B60, up (9.83%) B70, up (11.4%) B80, up (12.9%) B90, and up (14.5%) B100 at full load and maximum RPM conditions.

Analysis of The Injection Pressure Effect on Single Cylinder Diesel Engine Power with Diesel Fuel-Methanol Blend Aguk Zuhdi Muhammad Fathallah; Adhi Iswantoro; Semin Semin; Beny Cahyono; I Made Ariana; Ananda Rizky Budi Pratama
International Journal of Marine Engineering Innovation and Research Vol 7, No 2 (2022)
Publisher : Institut Teknologi Sepuluh Nopember

The use of fossil diesel fuels still produces carbon dioxide emissions (CO2), sulphur dioxide (SO2), hydrocarbon emissions (HC), nitrogen oxide (NOx), and high total particles and carbon monoxide (CO). Moreover, the need for transportation of motor vehicles will always increase every year. The emission of exhaust gases resulting from the combustion process can essentially be reduced by improving fuel quality, the homogeneity of the fuel mixture, and regulating proper combustion. There are several ways to reduce exhaust emissions from diesel engines by providing precise injection pressures. This is done to get the perfect combustion. In addition, improving fuel quality is a way to reduce emissions of exhaust gases. Another one is by adding methanol to the diesel. The addition of methanol can reduce the emission of exhaust gas produced. The process of mixing the solar and methanol takes the addition of surfactants to obtain good homogeneity. Testing was conducted using simulation software with engine modeling. The result can be seen in the reduction and the addition of standard pressure 200 bar, that the emulsion fuel in SFOC (specific fuel oil consumption) suffered a decrease and increased by 0.2% and 0.3% at pressure 160 bar and pressure 240 bar. The fuel solution on SFOC suffered a decrease and an increase of 0.3% and 0.25% was produced by pressure 160 bar and pressure 240 bar. The highest NOx is produced by 240 bar injection pressures with Dexlite fuel while the lowest NOx is produced by 160 bar injection pressure with emulsion fuel.

PENGARUH PEMANASAN BAHAN BAKAR PADA MESIN DIESEL TERHADAP KONSUMSI BAHAN BAKAR DENGAN METODE HEAT RECOVERY JACKET COOLER Marinus S. Tappy; Jozua Ch. Huwae; Jefta Ratela; Barokah Barokah; Semin Semin; Yohan Wibisono; Hendra Purnomo
JURNAL BLUEFIN FISHERIES Vol 2, No 1 (2020)
Publisher : Politeknik Kelautan dan Perikanan Bitung

Mesin diesel merupakan salah satu jenis mesin pembakaran internal yang sangat diperlukan dalam kehidupan manusia saat ini. Teknologi mesin diesel terus berkembang hingga saat ini. Namun mesin diesel sangat bergantung pada bahan bakar diesel fosil, sedangkan stok bahan bakar fosil semakin berkurang. Berkaitan dengan fenomena tersebut, maka dilakukan penelitian dengan tujuan mengaplikasikan heat recovery jacket cooler berbasis fuel heater dan menganalisis besarnya konsumsi bahan bakar. Penelitian ini menggunakan metodeeksperimental antara lain pembuatan instalasi fuel heater dan pengukuran konsumsi bahan bakar. Pada percobaan menggunakan bahan bakar biodiesel (B20) dengan variasi temperatur 30oC, 35oC, 40oC, 45oC, dan 50oC. Mesin diesel yang digunakan dalam penelitian ini adalah mesin 4 langkah, 4 silinder, 1500 rpm 18 kVA dan mesin diesel dalam kondisi tanpa beban. Hasil penelitian menunjukkan bahwa semakin tinggi temperatur bahan bakar semakin menurun konsumsinya, sehingga dapat disimpulkan bahwa pemanasan bahan bakar mempengaruhi efisiensi konsumsi bahan bakar.Kata kunci: Mesin Diesel; Konsumsi bahan bakar; Pemanas; Pendinginan Jaket;

The Phenomenon of Biodiesel Heating: Its Effect on Viscosity, Density, and Emission Barokah Barokah; Semin Semin; Beny Cahyono; Bambang Sampurno; Ahmad Ilham Ramadhani; M. Bintang Fikri
International Journal of Marine Engineering Innovation and Research Vol 7, No 4 (2022)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v7i4.14827

Biodiesel fuel is a mixture of diesel oil mixed with vegetable oil (palm). The composition of the mixture affects its properties, especially viscosity and density. The research was conducted to determine the effect of increasing temperature on these properties. By applying several experimental methods, including the ASTM D 445-95 method, the pycnometer method, and the particulate emission test method. The biodiesel test was carried out with variations in temperature of 30oC, 40oC, 50oC, 60oC, and 70oC at room conditions of 24.0oC temperature and 71% humidity. From the temperature variation, the viscosity is 2.23 cSt, 2.61 cSt, 3.1 cSt, 3.7 cSt, and 4.45 cSt. The results of the research prove that the increase in biodiesel temperature affects decreasing viscosity and density which has an impact on reducing particulate emissions.

Co-Authors Adhi Iswantoro Afanda Dwi Ragil Risnavian Ahmad Ilham Ramadhani Ananda Rizky Budi Pratama Bambang Sampurno Barokah Barokah Barokah Barokah Beny Cahyono Cahyono, Beny Dwi Priyanta Fakka Kodrat Tulloh Fathallah, Aguk Zuhdi Muhammad Hari Prastowo Hendra Purnomo Himmawan Aan Listyanto I Made Ariana Istiqomah Istiqomah Jefta Ratela Jozua Ch. Huwae M. Badrus Zaman M. Bintang Fikri Marinus S. Tappy Nurhadi Siswantoro Rosli Abu Bakar Sardono Sarwito Taruno Ganggas Daruadji Baskoro Trika Pitana Yohan Wibisono

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